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The global techniques color code the datasets to provide an overview, while the local techniques can be used for a localized examination and for determining precise information about the deviation between datasets.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 313, "image_height": 313, "name": "TR-186-2-07-12-image.PNG", "type": "image/png", "size": 130027, "path": "Publication:TR-186-2-07-12", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/TR-186-2-07-12-image.PNG", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/TR-186-2-07-12-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 607, 611, 166 ], "number": "TR-186-2-07-12", "research_areas": [], "keywords": [ "Comparison", "Variance" ], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 313, "image_height": 313, "name": "TR-186-2-07-12-image.PNG", "type": "image/png", "size": 130027, "path": "Publication:TR-186-2-07-12", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/TR-186-2-07-12-image.PNG", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/TR-186-2-07-12-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "TR-186-2-07-12-paper.pdf", "type": "application/pdf", "size": 10723653, "path": "Publication:TR-186-2-07-12", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/TR-186-2-07-12-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/TR-186-2-07-12-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-12/", "__class": "Publication" }, { "id": "weidlich_2007_almfs", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Arbitrarily Layered Micro-Facet Surfaces", "date": "2007-12", "abstract": "In this paper we present a method to combine several micro-facet based surface layers into a single unified, expressive BRDF model that is easy to use. The restriction to micro-facet based layers constitutes no loss of generality, since both perfectly specular and perfectly diffuse surfaces can be seen as limit cases of the micro-facet approach.\r\n\r\nSuch multi-layered surfaces can be used to re-create the appearance of a wide range of different materials, and yield good results without having to perform explicit sub–surface scattering computations. This is achieved through suitable approximations and simplifications of the scattering within the simulated layered surface, while still taking absorption and total internal reflection into account. We also discuss the corresponding probability distribution function that is needed for sampling purposes, and investigate how the flexibility of this new approach is best put to use. ", "authors_et_al": false, "substitute": null, "main_image": { "description": "Sample object that uses several of the surface models described in the paper", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 460, "image_height": 430, "name": "weidlich_2007_almfs-image.jpg", "type": "image/jpeg", "size": 39058, "path": "Publication:weidlich_2007_almfs", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/weidlich_2007_almfs-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/weidlich_2007_almfs-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 567, 192 ], "booktitle": "GRAPHITE 2007", "isbn": "978-1-59593-912-8", "lecturer": [ 567 ], "location": "Perth, Australia", "pages_from": "171", "pages_to": "178", "publisher": "ACM", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "Sample object that uses several of the surface models described in the paper", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 460, "image_height": 430, "name": "weidlich_2007_almfs-image.jpg", "type": "image/jpeg", "size": 39058, "path": "Publication:weidlich_2007_almfs", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/weidlich_2007_almfs-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/weidlich_2007_almfs-image:thumb{{size}}.png" }, { "description": "Full conference paper", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "weidlich_2007_almfs-paper.pdf", "type": "application/pdf", "size": 2314063, "path": "Publication:weidlich_2007_almfs", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/weidlich_2007_almfs-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/weidlich_2007_almfs-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/weidlich_2007_almfs/", "__class": "Publication" }, { "id": "patel_daniel_2007_IRSD", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Illustrative Rendering of Seismic Data", "date": "2007-11", "abstract": "In our work we present techniques for illustrative rendering of interpreted seismic volume data by adopting elements from geology book illustrations. We also introduce combined visualization techniques of interpreted and uninterpreted data for validation, comparison and interdisciplinary communication reasons. We introduce the concept of smooth transitions between these two semantical levels. To achieve this we present transfer functions that map seismic volume attributes to 2D textures that flow according to a deformation volume describing the buckling and discontinuities of the layers of the seismic data.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 1436, "image_height": 644, "name": "patel_daniel_2007_IRSD-.jpg", "type": "image/jpeg", "size": 344126, "path": "Publication:patel_daniel_2007_IRSD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 616, 668, 669, 166 ], "booktitle": "Proceeding of Vision Modeling and Visualization 2007", "date_from": "2007-11-07", "date_to": "2007-11-09", "editor": "Hendrik. Lensch, Bodo Rosenhahn, H.P. Seidel", "journal": "Vision, Modelling and Visualization", "lecturer": [ 616 ], "location": "Saarbrücken, Germany", "pages_from": "13", "pages_to": "22", "research_areas": [ "IllVis" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 1436, "image_height": 644, "name": "patel_daniel_2007_IRSD-.jpg", "type": "image/jpeg", "size": 344126, "path": "Publication:patel_daniel_2007_IRSD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-:thumb{{size}}.png" }, { "description": null, "filetitle": "Ill. rendering if seismic data", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1436, "image_height": 644, "name": 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175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-Illustrative rendering:thumb{{size}}.png" }, { "description": "movie clip of application in use", "filetitle": "movie clip", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 1436, "preview_image_height": 644, "name": "patel_daniel_2007_IRSD-movie clip.avi", "type": "video/x-msvideo", "size": 39037160, "path": "Publication:patel_daniel_2007_IRSD", "preview_name": "patel_daniel_2007_IRSD-movie clip:preview.png", "preview_type": "image/png", "preview_size": 576188, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-movie clip.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-movie clip:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-movie clip:video.mp4" }, { "description": null, "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 1492, "preview_image_height": 3468, "name": "patel_daniel_2007_IRSD-paper.pdf", "type": "application/pdf", "size": 14016071, "path": "Publication:patel_daniel_2007_IRSD", "preview_name": "patel_daniel_2007_IRSD-paper:preview.png", "preview_type": "image/png", "preview_size": 3369232, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/patel_daniel_2007_IRSD-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/patel_daniel_2007_IRSD/", "__class": "Publication" }, { "id": "heinzl-2007-sem", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Surface Extraction from Multi-Material Components for Metrology using Dual Energy CT", "date": "2007-11", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1054, "image_height": 1095, "name": "heinzl-2007-sem-.png", "type": "image/png", "size": 806035, "path": "Publication:heinzl-2007-sem", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/heinzl-2007-sem/heinzl-2007-sem-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/heinzl-2007-sem/heinzl-2007-sem-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 611, 613, 166 ], "date_from": "2007-10-28", "date_to": "2007-11-01", "event": "IEEE Visualization", "issn": "1077-2626 ", "journal": "IEEE Transaction on Visualization and Computer Graphics", "lecturer": [ 611 ], "location": "Sacramento, USA", "number": "6", "pages_from": "1520", "pages_to": "1527", "volume": "13", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1054, "image_height": 1095, "name": "heinzl-2007-sem-.png", "type": "image/png", "size": 806035, "path": "Publication:heinzl-2007-sem", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/heinzl-2007-sem/heinzl-2007-sem-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/heinzl-2007-sem/heinzl-2007-sem-:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "heinzl-2007-sem-paper.pdf", "type": 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Since this technique needs to integrate\nover a hemisphere it was first only used in offline rendering tools.\nHowever, the increasing resources of modern graphics hardware,\nenable us to render ambient occlusion in realtime. The goal of this\nreport is to describe the most popular techniques with respect to\nrealtime rendering. First we introduce how ambient occlusion is\ndefined and then we will explain and categorize the presented techniques.\n", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 736 ], "number": "TR-186-2-07-13", "research_areas": [ "Rendering" ], "keywords": [ "ambient occlusion", " global illumination", "real time" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "knecht-2007-ao-paper.pdf", "type": "application/pdf", "size": 3440621, "path": "Publication:knecht-2007-ao", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/knecht-2007-ao/knecht-2007-ao-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/knecht-2007-ao/knecht-2007-ao-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/knecht-2007-ao/", "__class": "Publication" }, { "id": "CHARALAMBOS-2007-HLOD", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Optimized HLOD Refinement Driven by Hardware Occlusion Queries", "date": "2007-11", "abstract": "We present a new method for integrating hierarchical levels of detail (HLOD) with occlusion culling. The algorithm refines the HLOD hierarchy using geometric criteria as well as the occlusion information. For the refinement we use a simple model which takes into account the possible distribution of the visible pixels. The traversal of the HLOD hierarchy is optimized by a new algorithm which uses spatial and temporal coherence of visibility. We predict the HLOD refinement condition for the current frame based on the results from the last frame. This allows an efficient update of the front of termination nodes as well as an efficient scheduling of hardware occlusion queries. Compared to previous approaches, the new method improves on speed as well as image quality. The results indicate that the method is very close to the optimal scheduling of occlusion queries for driving the HLOD refinement.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 624, "image_height": 457, "name": "CHARALAMBOS-2007-HLOD-.png", "type": "image/png", "size": 8177, "path": "Publication:CHARALAMBOS-2007-HLOD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 621, 198, 193, 686 ], "booktitle": "Advances in Visual Computing (Third International Symposium on Visual Computing -- ISVC 2007)", "date_from": "2007-11-26", "date_to": "2007-11-28", "editor": "Bebis, G.; Boyle, R.; Parvin, B.; Koracin, D.; Paragios, N.; Tanveer, S.-M.; Ju, T.; Liu, Z.; Coquillart, S.; Cruz-Neira, C.; Möller, T.; Malzbender, T.", "isbn": "978-3-540-76855-9", "lecturer": [ 621 ], "location": "Lake Tahoe, Nevada/California", "pages_from": "106", "pages_to": "117", "publisher": "Springer", "series": "Lecture Notes in Computer Science, volume 4841", "research_areas": [ "Rendering" ], "keywords": [ "occlusion queries", "levels of detail", "occlusion culling" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 624, "image_height": 457, "name": "CHARALAMBOS-2007-HLOD-.png", "type": "image/png", "size": 8177, "path": "Publication:CHARALAMBOS-2007-HLOD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-:thumb{{size}}.png" }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "CHARALAMBOS-2007-HLOD-Preprint.pdf", "type": "application/pdf", "size": 1524313, "path": "Publication:CHARALAMBOS-2007-HLOD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-Preprint:thumb{{size}}.png" }, { "description": "Video for the paper", "filetitle": "video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 720, "preview_image_height": 576, "name": "CHARALAMBOS-2007-HLOD-video.avi", "type": "video/x-msvideo", "size": 46642670, "path": "Publication:CHARALAMBOS-2007-HLOD", "preview_name": "CHARALAMBOS-2007-HLOD-video:preview.png", "preview_type": "image/jpeg", "preview_size": 8215, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-video:video.mp4" }, { "description": "Visualization of the error metric", "filetitle": "vis", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2553, "image_height": 1381, "name": "CHARALAMBOS-2007-HLOD-vis.png", "type": "image/png", "size": 885003, "path": "Publication:CHARALAMBOS-2007-HLOD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-vis.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/CHARALAMBOS-2007-HLOD-vis:thumb{{size}}.png" } ], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/CHARALAMBOS-2007-HLOD/", "__class": "Publication" }, { "id": "zotti-2007-hdr", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Measuring Light Pollution with a Calibrated High Dynamic Range All-Sky Image Acquisition System", "date": "2007-10", "abstract": "Combining series of exposures with different exposure times made with a digital SLR camera and a fish-eye lens allow to create high-resolution images that contain the full dynamic\nrange of daylight, including the Sun, usable as scene background and for skylight illumination computation purposes. These High Dynamic Range (HDR) images can also be calibrated with a luminance meter, so the image\ndata contain meaningful values, and the system becomes a measuring device. At night, long-time exposures can be combined, and the setup, once fine-calibrated with a Sky Quality\nMeter or another low-level light measuring device, becomes a valuable tool to provide absolute values of sky brightness. Using data from\nthe astronomical literature, false-colour plots of sky luminance can be created that closely match visual estimation of visible stellar magnitudes.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222 ], "address": "Bled", "booktitle": "DARKSKY2007 - 7th European Symposium for the Protection of the Night Sky", "date_from": "2007-10-05", "date_to": "2007-10-06", "editor": "Andrej Mohar", "lecturer": [ 222 ], "location": "Bled", "research_areas": [], "keywords": [ "HDR imaging", "Light Pollution", "Skylight" ], "weblinks": [], "files": [ { "description": "", "filetitle": "Paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "zotti-2007-hdr-Paper.pdf", "type": "application/pdf", "size": 3126570, "path": "Publication:zotti-2007-hdr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-hdr/zotti-2007-hdr-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-hdr/zotti-2007-hdr-Paper:thumb{{size}}.png" }, { "description": "", "filetitle": "Presentation", "main_file": false, "use_in_gallery": false, "access": "public", "name": "zotti-2007-hdr-Presentation.pdf", "type": "application/pdf", "size": 1097068, "path": "Publication:zotti-2007-hdr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-hdr/zotti-2007-hdr-Presentation.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-hdr/zotti-2007-hdr-Presentation:thumb{{size}}.png" } ], "projects_workgroups": [ "Skydome" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-hdr/", "__class": "Publication" }, { "id": "kohlmann-2007-livesync", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "LiveSync: Deformed Viewing Spheres for Knowledge-Based Navigation", "date": "2007-10", "abstract": "Although real-time interactive volume rendering is available even for very large data sets, this visualization method is used quite rarely in the clinical practice. We suspect this is because it is very complicated and time consuming to adjust the parameters to achieve meaningful results. The clinician has to take care of the appropriate viewpoint, zooming, transfer function setup, clipping planes and other parameters. Because of this, most often only 2D slices of the data set are examined. Our work introduces LiveSync, a new concept to synchronize 2D slice views and volumetric views of medical data sets. Through intuitive picking actions on the slice, the users define the anatomical structures they are interested in. The 3D volumetric view is updated automatically with the goal that the users are provided with expressive result images. To achieve this live synchronization we use a minimal set of derived information without the need for segmented data sets or data-specific pre-computations. The components we consider are the picked point, slice view zoom, patient orientation, viewpoint history, local object shape and visibility. We introduce deformed viewing spheres which encode the viewpoint quality for the components. A combination of these deformed viewing spheres is used to estimate a good viewpoint. Our system provides the physician with synchronized views which help to gain deeper insight into the medical data with minimal user interaction.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 788, "image_height": 636, "name": "kohlmann-2007-livesync-image.jpg", "type": "image/jpeg", "size": 127751, "path": "Publication:kohlmann-2007-livesync", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 605, 161, 162, 166 ], "date_from": "2007-10-28", "date_to": "2007-11-01", "event": "IEEE Visualization 2007", "journal": "IEEE Transactions on Visualization and Computer Graphics", "lecturer": [ 605 ], "location": "Sacramento, California, USA", "note": "to be presented at IEEE Visualization 2007", "number": "6", "pages_from": "1544", "pages_to": "1551", "volume": "13", "research_areas": [], "keywords": [ "linked views", "interaction", "medical visualization", "navigation", "viewpoint selection" ], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 788, "image_height": 636, "name": "kohlmann-2007-livesync-image.jpg", "type": "image/jpeg", "size": 127751, "path": "Publication:kohlmann-2007-livesync", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "kohlmann-2007-livesync-paper.pdf", "type": "application/pdf", "size": 10306194, "path": "Publication:kohlmann-2007-livesync", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-paper:thumb{{size}}.png" }, { "description": "", "filetitle": "slides", "main_file": false, "use_in_gallery": false, "access": "public", "name": "kohlmann-2007-livesync-slides.zip", "type": "application/x-zip", "size": 22827882, "path": "Publication:kohlmann-2007-livesync", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-slides.zip", "thumb_image_sizes": [] }, { "description": "", "filetitle": "video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 1296, "preview_image_height": 960, "name": "kohlmann-2007-livesync-video.avi", "type": "video/x-msvideo", "size": 39098560, "path": "Publication:kohlmann-2007-livesync", "preview_name": "kohlmann-2007-livesync-video:preview.png", "preview_type": "image/jpeg", "preview_size": 84524, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/kohlmann-2007-livesync-video:video.mp4" } ], "projects_workgroups": [ "diagvis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/", "__class": "Publication" }, { "id": "bruckner-2007-EDF", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Enhancing Depth-Perception with Flexible Volumetric Halos", "date": "2007-10", "abstract": "Volumetric data commonly has high depth complexity which makes it difficult to judge spatial relationships accurately. There are many different ways to enhance depth perception, such as shading, contours, and shadows. Artists and illustrators frequently employ halos for this purpose. In this technique, regions surrounding the edges of certain structures are darkened or brightened which makes it easier to judge occlusion. Based on this concept, we present a flexible method for enhancing and highlighting structures of interest using GPU-based direct volume rendering. Our approach uses an interactively defined halo transfer function to classify structures of interest based on data value, direction, and position. A feature-preserving spreading algorithm is applied to distribute seed values to neighboring locations, generating a controllably smooth field of halo intensities. These halo intensities are then mapped to colors and opacities using a halo profile function. Our method can be used to annotate features at interactive frame rates.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Volume rendering of a human skull using volumetric halos", "filetitle": "Human Skull", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 734, "image_height": 734, "name": "bruckner-2007-EDF-Human Skull.jpg", "type": "image/jpeg", "size": 49210, "path": "Publication:bruckner-2007-EDF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Human Skull.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Human Skull:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 161, 166 ], "date_from": "2007-10-28", "date_to": "2007-11-01", "event": "IEEE Visualization 2007", "journal": "IEEE Transactions on Visualization and Computer Graphics", "lecturer": [ 161 ], "location": "Sacramento, California, USA", "number": "6", "pages_from": "1344", "pages_to": "1351", "volume": "13", "research_areas": [], "keywords": [ "volume rendering", "illustrative visualization", "halos" ], "weblinks": [], "files": [ { "description": "Volume rendering of a human skull using volumetric halos", "filetitle": "Human Skull", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 734, "image_height": 734, "name": "bruckner-2007-EDF-Human Skull.jpg", "type": "image/jpeg", "size": 49210, "path": "Publication:bruckner-2007-EDF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Human Skull.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Human Skull:thumb{{size}}.png" }, { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "bruckner-2007-EDF-Paper.pdf", "type": "application/pdf", "size": 16960434, "path": "Publication:bruckner-2007-EDF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Paper:thumb{{size}}.png" }, { "description": "Demonstration video", "filetitle": "Video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 768, "preview_image_height": 768, "name": "bruckner-2007-EDF-Video.avi", "type": "video/x-msvideo", "size": 37617126, "path": "Publication:bruckner-2007-EDF", "preview_name": "bruckner-2007-EDF-Video:preview.png", "preview_type": "image/jpeg", "preview_size": 36770, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/bruckner-2007-EDF-Video:video.mp4" } ], "projects_workgroups": [ "exvisation" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-EDF/", "__class": "Publication" }, { "id": "fizimayer-2007-art", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "A Real-Time Cloud Animation and Illumination Method", "date": "2007-10", "abstract": "Over the last years, real-time rendering, especially for virtual environments as can be seen in most computer games, became more and more important. As the capabilities of graphics hardware continuously increases, the expectations of users regarding to visual quality are also increasing relativly fast.\r\n\r\nCompared to the rapid development in many fields of computer graphics, a very important element for real-time outdoor scene rendering has been almost completely disregarded. Clouds can highly improve the visual quality of a scene due to their complex structure, the beautiful colors as well as their formation and movement. Because of the computational effort to render animated and dynamically lit clouds, it has been impossible for consumer graphics adapters to draw them and simultaneously keep the framerate high enough. Although there are many methods which allow drawing clouds in outdoor environments fast enough, all of them have some restrictions eighter in movement, lighting or formation.\r\n\r\nThis thesis will examine how plausible cloud animation can be done in real time on consumer graphics hardware and how the animation results can be used to render high-quality, dynamically lit, volumetric clouds with relativly high frame rates. Since high-quality solutions already exist for non-real-time rendering applications and they are almost completely computed on the CPU, which is not acceptable for most games since the CPU is very often already at peak load, methods will be discussed to adapt those algorithms to be performed on the GPU, while also some new improvements will be presented.\r\n\r\nThe thesis first gives an overview of state-of-the-art of cloud rendering algorithms for real-time as well as for non-real-time rendering. Then, we will try to adapt parts of these techniques to work in interactive environments at high framerates while all significant characteristics of the non-real-time methods like cloud formation, extinction, movement and dynamic lighting will still be preserved.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 688 ], "supervisor": [ 190, 193 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "fizimayer-2007-art-thesis.pdf", "type": "application/pdf", "size": 26281136, "path": "Publication:fizimayer-2007-art", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/fizimayer-2007-art/fizimayer-2007-art-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/fizimayer-2007-art/fizimayer-2007-art-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/fizimayer-2007-art/", "__class": "Publication" }, { "id": "termeer-2007-covicad", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "CoViCAD: Comprehensive Visualization of Coronary Artery Disease", "date": "2007-10", "abstract": "We present novel, comprehensive visualization techniques for the diagnosis of patients with Coronary Artery Disease using segmented cardiac MRI data. We extent an accepted medical visualization technique called the bull’s eye plot by removing discontinuities, preserving the volumetric nature of the left ventricular wall and adding anatomical context. The resulting volumetric bull’s eye plot can be used for the assessment of transmurality. We link these visualizations to a 3D view that presents viability information in a detailed anatomical context. We combine multiple MRI scans (whole heart anatomical data, late enhancement data) and multiple segmentations (polygonal heart model, late enhancement contours, coronary artery tree). By selectively combining different rendering techniques we obtain comprehensive yet intuitive visualizations of the various data sources.", "authors_et_al": false, "substitute": null, "main_image": { "description": "3D model of the heart annotated with viability data", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 618, "image_height": 877, "name": "termeer-2007-covicad-image.png", "type": "image/png", "size": 320323, "path": "Publication:termeer-2007-covicad", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 606, 647, 679, 459, 575, 166 ], "journal": "IEEE Transactions on Visualization and Computer Graphics (accepted for publication)", "lecturer": [ 606 ], "number": "6", "volume": "13", "research_areas": [], "keywords": [ "VBEP", "viability", "late enhancement", "Cardiac MRI", "bull" ], "weblinks": [], "files": [ { "description": "3D model of the heart annotated with viability data", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 618, "image_height": 877, "name": "termeer-2007-covicad-image.png", "type": "image/png", "size": 320323, "path": "Publication:termeer-2007-covicad", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "termeer-2007-covicad-paper.pdf", "type": "application/pdf", "size": 7366407, "path": "Publication:termeer-2007-covicad", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-paper:thumb{{size}}.png" }, { "description": "", "filetitle": "video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 512, "preview_image_height": 384, "name": "termeer-2007-covicad-video.avi", "type": "video/x-msvideo", "size": 19198352, "path": "Publication:termeer-2007-covicad", "preview_name": "termeer-2007-covicad-video:preview.png", "preview_type": "image/png", "preview_size": 123651, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/termeer-2007-covicad-video:video.mp4" } ], "projects_workgroups": [ "COMRADE" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/termeer-2007-covicad/", "__class": "Publication" }, { "id": "roch-2007-rtt", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Real-Time Tone Mapping Using Selective Rendering", "date": "2007-10", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 598 ], "supervisor": [ 190 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "roch-2007-rtt-thesis.pdf", "type": "application/pdf", "size": 1976495, "path": "Publication:roch-2007-rtt", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/roch-2007-rtt/roch-2007-rtt-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/roch-2007-rtt/roch-2007-rtt-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/roch-2007-rtt/", "__class": "Publication" }, { "id": "Kehrer-2007-Mas", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Integrating Interactive Visual Analysis of Large Time Series Data into the SimVis System", "date": "2007-10", "abstract": "Massive amounts of complex time-dependent information arise in various areas of business, science and engineering. These time series datasets commonly result from the measurement, modeling or the simulation of dynamic processes and contain multiple attributes changing over time. Examples are meteorological data, climate data, financial data, census data, or medical data, to name a few.\r\n\r\nIn this thesis the CurveView for the enhanced interactive visual analysis of multidimensional and large time series data is presented. Two approaches are proposed, one for the interactive visual representation of the data, and so-called brushing techniques allowing the user to select certain interesting subsets of the data (i.e., features) in an intuitive and interactive way. The goals are to enable analysts to gain insight into their data sets, to create, verify or reject hypotheses based on the data, and to explore the temporal evolution of different attributes in order to detect expected structures and to discover unexpected features. The presented solution is integrated into SimVis, a multiple-views system for the visual analysis of time-dependent simulation results.\r\n\r\nThe data is visualized using focus+context visualization techniques: important or selected portions of the data (focus) are visually accented, while the rest of the data (context) is shown in a less prominent style. In doing so, enhanced navigation and orientation is provided to the user. By the application of customizable transfer functions, general data trends, visual structures and patterns can be emphasized even within dense regions of the visualization. On the other hand, so-called outliers, which denote time series in low populated areas of the display or important (ie, brushed) data items hidden in regions of context information, are discriminable in the visualization. By the application of binning techniques large amounts of time-dependent information are transformed into a reduced but still meaningful representation which can be depicted at interactive frame rates.\r\n\r\nFurthermore, interactive brushing techniques are provided to the user for analysis purposes. Thus, complex time-dependent features can be specified by applying fuzzy classification to the time series data. Two kinds of brushes exist in the CurveView: similarity-based brushes where time series are classified according to their similarity to a user-defined pattern directly sketched in the view; and time step brushes, which select time series running through a certain area of the view. In SimVis, the interrelations between the specified features in multiple time-dependent dimensions can be analyzed visually using multiple linked views that show different attributes (i.e., dimensions) of the data.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 690, "image_height": 648, "name": "Kehrer-2007-Mas-image.jpg", "type": "image/jpeg", "size": 101131, "path": "Publication:Kehrer-2007-Mas", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/Kehrer-2007-Mas-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/Kehrer-2007-Mas-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 983 ], "supervisor": [ 176 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 690, "image_height": 648, "name": "Kehrer-2007-Mas-image.jpg", "type": "image/jpeg", "size": 101131, "path": "Publication:Kehrer-2007-Mas", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/Kehrer-2007-Mas-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/Kehrer-2007-Mas-image:thumb{{size}}.png" }, { "description": "", "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Kehrer-2007-Mas-Thesis.pdf", "type": "application/pdf", "size": 10222257, "path": "Publication:Kehrer-2007-Mas", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/Kehrer-2007-Mas-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/Kehrer-2007-Mas-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kehrer-2007-Mas/", "__class": "Publication" }, { "id": "Rautek-2007-SLI", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Semantic Layers for Illustrative Volume Rendering", "date": "2007-10", "abstract": "Direct volume rendering techniques map volumetric attributes (e.g., density, gradient magnitude, etc.) to visual styles. Commonly this mapping is specified by a transfer function. The specification of transfer functions is a complex task and requires expert knowledge about the underlying rendering technique. In the case of multiple volumetric attributes and multiple visual styles the specification of the multi-dimensional transfer function becomes more challenging and non-intuitive.\nWe present a novel methodology for the specification of a mapping from several volumetric attributes to multiple illustrative visual styles. \nWe introduce semantic layers that allow a domain expert to specify the mapping in the natural language of the domain. \nA semantic layer defines the mapping of volumetric attributes to one visual style. \nVolumetric attributes and visual styles are represented as fuzzy sets.\nThe mapping is specified by rules that are evaluated with fuzzy logic arithmetics. The user specifies the fuzzy sets and the rules without special knowledge about the underlying rendering technique. Semantic layers allow for a linguistic specification of the mapping from attributes to visual styles replacing the traditional transfer function specification.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "Rautek-2007-SLI-image.jpg", "type": "image/jpeg", "size": 81669, "path": "Publication:Rautek-2007-SLI", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 488, 161, 166 ], "date_from": "2007-10-28", "date_to": "2007-11-01", "event": "IEEE Visualization 2007", "journal": "IEEE Transactions on Visualization and Computer Graphics", "lecturer": [ 488 ], "location": "Sacramento, California, USA", "note": "to be presented at IEEE Visualization 2007", "number": "6", "pages_from": "1336", "pages_to": "1343", "volume": "13", "research_areas": [ "IllVis" ], "keywords": [ "Illustrative Visualization", "Volume Visualization", "Focus+Context Techniques" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "Rautek-2007-SLI-image.jpg", "type": "image/jpeg", "size": 81669, "path": "Publication:Rautek-2007-SLI", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Rautek-2007-SLI-paper.pdf", "type": "application/pdf", "size": 11683201, "path": "Publication:Rautek-2007-SLI", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-paper:thumb{{size}}.png" }, { "description": null, "filetitle": "video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 1600, "preview_image_height": 1144, "name": "Rautek-2007-SLI-video.avi", "type": "video/x-msvideo", "size": 24765278, "path": "Publication:Rautek-2007-SLI", "preview_name": "Rautek-2007-SLI-video:preview.png", "preview_type": "image/jpeg", "preview_size": 29347, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/Rautek-2007-SLI-video:video.mp4" } ], "projects_workgroups": [ "exvisation" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-SLI/", "__class": "Publication" }, { "id": "guerrero-2008-dip", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Approximative Real-time Soft Shadows and Diffuse Reflections in Dynamic Scenes", "date": "2007-10", "abstract": "This thesis describes a method for approximative soft shadows and diffuse reflections in dynamic scenes, based on a method by Ren et al. [32]. An overview of precomputed radiance transfer and spherical harmonics is also presented, as well as a short introduction to global illumination. The proposed method uses a low-order spherical harmonics basis to represent incident radiance and visibility on the hemisphere of a receiver point. Diffuse reflecting geometry and shadow casting geometry is represented as sets of spheres. The spheres of an object approximate its shape and diffuse surface color as seen from any viewpoint. In a first pass, the direct illumination of an object is projected to its spheres and stored along with an approximation of the diffuse surface color as SH vectors defined over the surface of each sphere. In a second pass, the average color and the visibility for each sphere at a receiver point is found. The product of average color and visibility is used to approximate the incident radiance from diffuse reflections. Using a sphere set approximation instead of actual geometry for both soft shadows and diffuse reflections allows us to compute the visibility and diffuse reflections of an object on the fly at runtime. This text also describes a GPU implementation of the method and discusses obtained results. Interactive performance with relatively smooth framerates of over 20 fps is achieved for moderately complex scenes.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 800, "image_height": 600, "name": "guerrero-2008-dip-image.jpg", "type": "image/jpeg", "size": 99766, "path": "Publication:guerrero-2008-dip", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/guerrero-2008-dip-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/guerrero-2008-dip-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 627 ], "supervisor": [ 356 ], "research_areas": [], "keywords": [ "precomputed radiance transfer", "indirect illumination", "global illumination" ], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 800, "image_height": 600, "name": "guerrero-2008-dip-image.jpg", "type": "image/jpeg", "size": 99766, "path": "Publication:guerrero-2008-dip", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/guerrero-2008-dip-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/guerrero-2008-dip-image:thumb{{size}}.png" }, { "description": "Diploma Thesis", "filetitle": "thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "guerrero-2008-dip-thesis.pdf", "type": "application/pdf", "size": 4082515, "path": "Publication:guerrero-2008-dip", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/guerrero-2008-dip-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/guerrero-2008-dip-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/guerrero-2008-dip/", "__class": "Publication" }, { "id": "zotti-2007-eg", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Tangible Heritage: Production of Astrolabes on a Laser Engraver", "date": "2007-09", "abstract": "The astrolabe, an analog computing device, used to be the iconic\n instrument of astronomers during the Middle Ages. It allowed a\n multitude of operations of practical astronomy which were otherwise\n cumbersome to perform in an epoch when mathematics had apparently\n almost been forgotten. Usually made from wood or sheet metal, a\n few hundred instruments, mostly from brass, survived until today and\n are valuable \n museum showpieces. This paper explains a procedural modelling\n approach for the construction of the classical kinds of astrolabes,\n which allows a wide variety of applications from plain explanatory\n illustrations to 3D models, and even the production of working\n physical astrolabes usable for public or classroom demonstrations.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Astrolabe Front", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 560, "image_height": 624, "name": "zotti-2007-eg-.png", "type": "image/png", "size": 255700, "path": "Publication:zotti-2007-eg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/zotti-2007-eg-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/zotti-2007-eg-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222 ], "booktitle": "EG2007 Cultural Heritage Papers", "date_from": "2007-09-03", "date_to": "2007-09-07", "editor": "David B. Arnold and Andrej Ferko", "issn": "1017-4656", "lecturer": [ 222 ], "location": "Prague", "organization": "Eurographics", "pages_from": "41", "pages_to": "48 (colorplate:p60)", "publisher": "Eurographics", "research_areas": [ "Modeling" ], "keywords": [ "Cultural Heritage", "Astronomy", "Astrolabe", "Procedural Modelling" ], "weblinks": [], "files": [ { "description": "Astrolabe Front", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 560, "image_height": 624, "name": "zotti-2007-eg-.png", "type": "image/png", "size": 255700, "path": "Publication:zotti-2007-eg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/zotti-2007-eg-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/zotti-2007-eg-:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "zotti-2007-eg-paper.pdf", "type": "application/pdf", "size": 4690498, "path": "Publication:zotti-2007-eg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/zotti-2007-eg-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/zotti-2007-eg-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-eg/", "__class": "Publication" }, { "id": "bruckner-2007-STF", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Style Transfer Functions for Illustrative Volume Rendering", "date": "2007-09", "abstract": "Illustrative volume visualization frequently employs non-photorealistic rendering techniques to enhance important features or to suppress unwanted details. However, it is difficult to integrate multiple non-photorealistic rendering approaches into a single framework due to great differences in the individual methods and their parameters. In this paper, we present the concept of style transfer functions. Our approach enables flexible data-driven illumination which goes beyond using the transfer function to just assign colors and opacities. An image-based lighting model uses sphere maps to represent non-photorealistic rendering styles. Style transfer functions allow us to combine a multitude of different shading styles in a single rendering. We extend this concept with a technique for curvature-controlled style contours and an illustrative transparency model. Our implementation of the presented methods allows interactive generation of high-quality volumetric illustrations.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Illustrative volume rendering of a human head using style transfer functions", "filetitle": "Head", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 875, "image_height": 1062, "name": "bruckner-2007-STF-Head.png", "type": "image/png", "size": 1499331, "path": "Publication:bruckner-2007-STF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Head.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Head:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 161, 166 ], "date_from": "2007-09-03", "date_to": "2007-09-07", "event": "Eurographics 2007", "journal": "Computer Graphics Forum", "lecturer": [ 161 ], "location": "Prague, Czech Republic", "note": "Eurographics 2007 3rd Best Paper Award", "number": "3", "pages_from": "715", "pages_to": "724", "volume": "26", "research_areas": [ "IllVis" ], "keywords": [ "illustrative visualization", "transfer functions", "volume rendering" ], "weblinks": [], "files": [ { "description": "Illustrative volume rendering of a human head using style transfer functions", "filetitle": "Head", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 875, "image_height": 1062, "name": "bruckner-2007-STF-Head.png", "type": "image/png", "size": 1499331, "path": "Publication:bruckner-2007-STF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Head.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Head:thumb{{size}}.png" }, { "description": "Illustrative volume rendering of a human head using style transfer functions", "filetitle": "Human Head", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 875, "image_height": 1062, "name": "bruckner-2007-STF-Human Head.png", "type": "image/png", "size": 1499331, "path": "Publication:bruckner-2007-STF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Human Head.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Human Head:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "bruckner-2007-STF-Paper.pdf", "type": "application/pdf", "size": 13426711, "path": "Publication:bruckner-2007-STF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Paper:thumb{{size}}.png" }, { "description": "Demonstration video", "filetitle": "Video", "main_file": false, "use_in_gallery": false, "access": "public", "name": "bruckner-2007-STF-Video.avi", "type": "", "size": 45491680, "path": "Publication:bruckner-2007-STF", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/bruckner-2007-STF-Video.avi", "thumb_image_sizes": [] } ], "projects_workgroups": [ "exvisation" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bruckner-2007-STF/", "__class": "Publication" }, { "id": "toth-2007-ndd", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "N-dimensional Data-Dependent Reconstruction Using Topological Changes", "date": "2007-09", "abstract": "We introduce a new concept for a geometrically based feature preserving reconstruction\r\ntechnique of n-dimensional scattered data. Our goal is to generate\r\nan n-dimensional triangulation, which preserves the high frequency regions via\r\nlocal topology changes. It is the generalization of a 2D reconstruction approach\r\nbased on data-dependent triangulation and Lawson‘s optimization procedure.\r\nThe definition of the mathematic optimum of the reconstruction is given. We\r\ndiscuss an original cost function and a generalization of known functions for\r\nthe n-dimensional case.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 288, "image_height": 196, "name": "toth-2007-ndd-image.jpg", "type": "image/jpeg", "size": 46901, "path": "Publication:toth-2007-ndd", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/toth-2007-ndd-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/toth-2007-ndd-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 582, 171, 583, 166 ], "booktitle": "Proceedings of TopoInVis 2005, Topology-based Methods in Visualization", "date_from": "2005-09-29", "date_to": "2005-09-30", "editor": "H. Hauser, H. Hagen, H. Theisel", "lecturer": [ 582 ], "location": "Budmerice, Slovakia", "note": "Konferenz hat 2005 stattgefunden, Proceeding ist allerdings erst 2007 erschienen", "pages_from": "183", "pages_to": "198", "publisher": "Springer", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 288, "image_height": 196, "name": "toth-2007-ndd-image.jpg", "type": "image/jpeg", "size": 46901, "path": "Publication:toth-2007-ndd", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/toth-2007-ndd-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/toth-2007-ndd-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "toth-2007-ndd-paper.pdf", "type": "application/pdf", "size": 7344349, "path": "Publication:toth-2007-ndd", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/toth-2007-ndd-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/toth-2007-ndd-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "PVG" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/toth-2007-ndd/", "__class": "Publication" }, { "id": "viola-2007-ort", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "On the Role of Topology in Focus+Context Visualization", "date": "2007-09", "abstract": "In this paper three types of visualization scenarios are discussed, where topology\r\nimproves the readability of particular visualization results. The \frst type\r\ncombines topology information represented by simple graphical primitives\r\nwith other forms of visual representations. The second type uses the topology\r\ninformation to de\fne the relevance of objects within the data. The relevance\r\nis re\r\nected in the visualization by applying the cut-away concept. The third\r\ntype of visualizations is based on the change of topology of the underlying\r\ndata to increase visibility of the most interesting information. Every type\r\nhandles topology in a di\u000berent way. This illustrates various roles of topology\r\nin scienti\fc visualization.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 287, "image_height": 216, "name": "viola-2007-ort-image.jpg", "type": "image/jpeg", "size": 72798, "path": "Publication:viola-2007-ort", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/viola-2007-ort-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/viola-2007-ort-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171, 166 ], "booktitle": "Proceedings of TopoInVis 2005, Topology-based Methods in Visualization", "date_from": "2005-09-29", "date_to": "2005-09-30", "editor": "H. Hauser, H. Hagen, H. Theisel", "lecturer": [ 171 ], "location": "Budmerice, Slovakia", "note": "Konferenz hat 2005 stattgefunden, Proceeding ist allerdings erst 2007 erschienen", "pages_from": "171", "pages_to": "181", "publisher": "Springer", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 287, "image_height": 216, "name": "viola-2007-ort-image.jpg", "type": "image/jpeg", "size": 72798, "path": "Publication:viola-2007-ort", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/viola-2007-ort-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/viola-2007-ort-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "viola-2007-ort-paper.pdf", "type": "application/pdf", "size": 8081327, "path": "Publication:viola-2007-ort", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/viola-2007-ort-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/viola-2007-ort-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/viola-2007-ort/", "__class": "Publication" }, { "id": "TR-186-2-07-09", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Rendering Imperfections: Dust, Scratches, Aging,...", "date": "2007-09", "abstract": "In order to incrase the realism of an image or a scene in a computergraphics application, so-called imperfections are often used during rendering. These are techniques which add details like dirt, scratches, dust or aging effects to the models and textures.\n\nRealism is improved through imperfections since computer generated models are usually too perfect to be accepted as realistic by human observers. By making them, for example, dusty and scratched, people can imagine them being part of their real world much more easily.\n\nThis article gives an overview of currently used imperfections techniques and algorithms. Topics like textures, scratches, aging, dust, weathering, lichen growth and terrain erosion are covered.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 678, 193 ], "number": "TR-186-2-07-09", "research_areas": [ "Rendering" ], "keywords": [ "scratches", "dust", "imperfections", "aging" ], "weblinks": [], "files": [ { "description": null, "filetitle": "TR", "main_file": true, "use_in_gallery": false, "access": "public", "name": "TR-186-2-07-09-TR.pdf", "type": "application/pdf", "size": 3109169, "path": "Publication:TR-186-2-07-09", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-09/TR-186-2-07-09-TR.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-09/TR-186-2-07-09-TR:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-09/", "__class": "Publication" }, { "id": "bauchinger-2007-mre", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Designing a Modern Rendering Engine", "date": "2007-08", "abstract": "The development of real-time rendering applications has become one of the most difficult software engineering areas due to the number and complexity of the needed techniques and algorithms involved. These software projects have in common that they need to structure the data in the main memory, process it and send it to the graphics device for rendering in an efficient way. These recurring and complex algorithms are provided by so called rendering engines to allow faster development of real-time rendering applications.\r\n\r\nThis thesis describes the concepts and design decisions which form the basis for the development of the rendering engine presented in this document. Detailed information is provided on the interface to the graphics device, a novel effect framework and the implemented graph structures allowing efficient data traversal.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 681 ], "supervisor": [ 193 ], "research_areas": [], "keywords": [ "game engines", "real-time rendering", "shader programming" ], "weblinks": [], "files": [ { "description": "", "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "bauchinger-2007-mre-Thesis.pdf", "type": "application/pdf", "size": 3048916, "path": "Publication:bauchinger-2007-mre", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bauchinger-2007-mre/bauchinger-2007-mre-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/bauchinger-2007-mre/bauchinger-2007-mre-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/bauchinger-2007-mre/", "__class": "Publication" }, { "id": "haidacher-2007-idr", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Importance-Driven Rendering in Interventional Imaging", "date": "2007-08", "abstract": "In this thesis a combined visualization of dense clinical data like 3D CTA (Computed Tomography\r\nAngiography) combined with co-registered real-time images of medical intervention\r\napplications is presented. The main challenge here is to provide a merged visualization that\r\nallows su\u001ecient spatial perception of the important parts, as derived from the pre-operative\r\ndata, while not occluding the information in the real-time image embedded within the volume.\r\nThis work presents a new approach of importance de\u001cnition for volumetric data and how\r\nthis importance can be used to create a feature-emphasized visualization. Furthermore the\r\nviewpoint and the position of the intervention image is used to generate a contextual cutaway\r\nwhich in\u001duences the density of the visualization to avoid an occlusion of the real-time image\r\nby less important parts of the volumetric data.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "Result image (CTA)", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 506, "image_height": 448, "name": "haidacher-2007-idr-Result image (CTA).jpg", "type": "image/jpeg", "size": 95562, "path": "Publication:haidacher-2007-idr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (CTA).jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (CTA):thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 597 ], "supervisor": [ 166, 171 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "Importance Control", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 393, "image_height": 493, "name": "haidacher-2007-idr-Importance Control.jpg", "type": "image/jpeg", "size": 97756, "path": "Publication:haidacher-2007-idr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Importance Control.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Importance Control:thumb{{size}}.png" }, { "description": "", "filetitle": "Masterthesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "haidacher-2007-idr-Masterthesis.pdf", "type": "application/pdf", "size": 5496178, "path": "Publication:haidacher-2007-idr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Masterthesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Masterthesis:thumb{{size}}.png" }, { "description": "", "filetitle": "Result image (CT)", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 509, "image_height": 436, "name": "haidacher-2007-idr-Result image (CT).jpg", "type": "image/jpeg", "size": 98729, "path": "Publication:haidacher-2007-idr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (CT).jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (CT):thumb{{size}}.png" }, { "description": "", "filetitle": "Result image (CTA)", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 506, "image_height": 448, "name": "haidacher-2007-idr-Result image (CTA).jpg", "type": "image/jpeg", "size": 95562, "path": "Publication:haidacher-2007-idr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (CTA).jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (CTA):thumb{{size}}.png" }, { "description": "", "filetitle": "Result image (MRI)", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 768, "image_height": 768, "name": "haidacher-2007-idr-Result image (MRI).jpg", "type": "image/jpeg", "size": 274057, "path": "Publication:haidacher-2007-idr", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (MRI).jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Result image (MRI):thumb{{size}}.png" }, { "description": "", "filetitle": "Video", "main_file": true, "use_in_gallery": false, "access": "public", "preview_image_width": 700, "preview_image_height": 526, "name": "haidacher-2007-idr-Video.avi", "type": "video/x-msvideo", "size": 7069324, "path": "Publication:haidacher-2007-idr", "preview_name": "haidacher-2007-idr-Video:preview.png", "preview_type": "image/jpeg", "preview_size": 41677, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/haidacher-2007-idr-Video:video.mp4" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/haidacher-2007-idr/", "__class": "Publication" }, { "id": "matkovic-2007-clv", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Color Lines View: An Approach to Visualization of Families of Function Graphs", "date": "2007-07", "abstract": "Data sets often include information that can be represented\r\nas a mapping that describes how a dependent variable\r\ndepends on an independent variable. Such a mapping,\r\nusually represented as a function graph, can be parameterized\r\nto provide a family of function graphs. The\r\nchallenge is how to efficiently aggregate individual function\r\ngraph views to represent the whole family and allow\r\nvisual analysis and search for patterns. We propose a novel\r\nview, called the color lines view, which provides a two dimensional,\r\nrectangular view where each line represents a\r\nsingle function graph. The points on the line correspond to\r\nvalues of the independent variable. The point colors represent\r\nthe value of the dependent variable. The lines, placed\r\nnext to each other in parallel, show a family of function\r\ngraphs. The color lines view offers sorting and brushing\r\nfeatures which support visual analysis procedures that are\r\ndifficult to perform with previously existing views.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 7833, "image_height": 4937, "name": "matkovic-2007-clv-.jpg", "type": "image/jpeg", "size": 1573063, "path": "Publication:matkovic-2007-clv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/matkovic-2007-clv-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/matkovic-2007-clv-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 235, 581, 756, 176 ], "booktitle": "Proceedings of 11th International Conference Information Visualization", "date_from": "2007-07-02", "date_to": "2007-07-06", "lecturer": [ 756 ], "location": "Zürich, Schweiz", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 7833, "image_height": 4937, "name": "matkovic-2007-clv-.jpg", "type": "image/jpeg", "size": 1573063, "path": "Publication:matkovic-2007-clv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/matkovic-2007-clv-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/matkovic-2007-clv-:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "matkovic-2007-clv-paper.pdf", "type": "application/pdf", "size": 4944878, "path": "Publication:matkovic-2007-clv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/matkovic-2007-clv-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/matkovic-2007-clv-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-clv/", "__class": "Publication" }, { "id": "roos-2007-mcp", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Multipath Curved Planar Reformation of the Peripheral Arterial Tree in CT Angiography", "date": "2007-07", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 690, 164, 691, 689, 167, 692, 162, 693, 166 ], "journal": "Journal Radiology", "number": "1", "pages_from": "281", "pages_to": "290", "volume": "244", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "roos-2007-mcp-paper.pdf", "type": "application/pdf", "size": 958853, "path": "Publication:roos-2007-mcp", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/roos-2007-mcp/roos-2007-mcp-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/roos-2007-mcp/roos-2007-mcp-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/roos-2007-mcp/", "__class": "Publication" }, { "id": "Konyha_2007_SCV", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive Visual Analysis of a Timing Chain Drive Using Segmented Curve View and other Coordinated Views", "date": "2007-07", "abstract": "A timing chain drive transfers motion from the engine's\r\ncrankshaft to the camshaft that operates the valves. The\r\ndesign process of timing chain drives involves computer\r\nsimulation of many design variants in order to \u0002nd an optimum.\r\nMost of the simulation results can be represented\r\nas families of function graphs (data series). Previously,\r\nthe analysis of those results was based on static 2D diagrams\r\nand animated 3D visualizations. They were suitable\r\nfor the detailed analysis of a few simulation variants, but\r\nnot for the comparison of many cases. In this paper we\r\npropose a new approach to the analysis based on coordinated\r\nlinked views and advanced brushing features. Our\r\nproposed method supports the interactive analysis of many\r\ndesign variants. We introduce a novel view, called segmented\r\ncurve view, which can display distributions in families\r\nof function graphs. The segmented curve view combines\r\nindividual function graphs where for a \u0002xed value\r\nof the independent variable, a bar extends from minimum\r\nto maximum values across the family of function graphs.\r\nEach bar is divided into segments (bins) with a color that\r\nrepresents the number of function graphs with the value\r\nin that segment. In the case study, we demonstrate that\r\nthe new view combined with “traditional” views provides\r\na strong support for the interactive visual exploration and\r\nanalysis of a real world timing chain design problem.", "authors_et_al": false, "substitute": null, "main_image": { "description": "3D view of chain driwe and linked views used in analysis", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 316, "image_height": 445, "name": "Konyha_2007_SCV-image.jpg", "type": "image/jpeg", "size": 128182, "path": "Publication:Konyha_2007_SCV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/Konyha_2007_SCV-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/Konyha_2007_SCV-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 756, 235, 581, 710, 580, 176 ], "booktitle": "Proccedings of 5th International Conference on Coordinated & Multiple Views in Exploratory Visualization", "date_from": "2007-07", "date_to": "2007-07", "lecturer": [ 756 ], "location": "Zuerich", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "Download paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Konyha_2007_SCV-Download paper.pdf", "type": "application/pdf", "size": 1715774, "path": "Publication:Konyha_2007_SCV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/Konyha_2007_SCV-Download paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/Konyha_2007_SCV-Download paper:thumb{{size}}.png" }, { "description": "3D view of chain driwe and linked views used in analysis", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 316, "image_height": 445, "name": "Konyha_2007_SCV-image.jpg", "type": "image/jpeg", "size": 128182, "path": "Publication:Konyha_2007_SCV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/Konyha_2007_SCV-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/Konyha_2007_SCV-image:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Konyha_2007_SCV/", "__class": "Publication" }, { "id": "matkovic-2007-uml", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Evolutional Insights from UML and Source Code Versions using Information Visualization and Visual Analysis", "date": "2007-06", "abstract": "Risks associated with producing todays software applications\r\nare increasingly linked with size and complexity —\r\njust too many aspects of software to fit in the head of even\r\nthe most talented software engineer. Understanding software\r\nentails more than browsing the source code or reviewing\r\nthe models in the other software artifacts. We use information\r\nvisualization and visual analysis techniques to parse\r\ndata sets generated from UML and Java SDK source code\r\nversions to examine patterns. This visual perspective provides\r\nrelevant insights and additional navigation opportunities\r\nfor software engineers during development and maintenance\r\nactivities.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 708, 581, 709, 235 ], "booktitle": "Proceedings of the 4th International Workshop on Visualizing Software for Understanding and Analysis, VisSoft 2007", "date_from": "2007-06-25", "date_to": "2007-06-26", "lecturer": [ 235 ], "location": "Banff, Canada", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "matkovic-2007-uml-paper.pdf", "type": "application/pdf", "size": 7340206, "path": "Publication:matkovic-2007-uml", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-uml/matkovic-2007-uml-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-uml/matkovic-2007-uml-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-uml/", "__class": "Publication" }, { "id": "Habel_2007_RTT", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Physically Based Real-Time Translucency for Leaves", "date": "2007-06", "abstract": "This paper presents a new shading model for real-time rendering of plant leaves that reproduces all important attributes of a leaf and allows for a large number of leaves to be shaded. In particular, we use a physically based model for accurate subsurface scattering on the translucent side of directly lit leaves. For real-time rendering of this model, we formulate it as an image convolution process and express the result in an efficient directional basis that is fast to evaluate. We also propose a data acquisition method for leaves that uses off-the-shelf devices.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Physically based translucency on a tree", "filetitle": "Screenshot", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1018, "image_height": 742, "name": "Habel_2007_RTT-Screenshot.png", "type": "image/png", "size": 986183, "path": "Publication:Habel_2007_RTT", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Screenshot.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Screenshot:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 618, 670, 193 ], "booktitle": "Rendering Techniques 2007 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2007-06-25", "date_to": "2007-06-27", "editor": "Jan Kautz and Sumanta Pattanaik", "isbn": "978-3-905673-52-4", "lecturer": [ 618 ], "location": "Grenoble, France", "organization": "Eurographics", "pages_from": "253", "pages_to": "263", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "Realtime Rendering", " Natural Scene Rendering", "Physically Based Rendering", "Natural Phenomena" ], "weblinks": [], "files": [ { "description": "Albedo, translucency, normal, HL2-basis and thickness maps", "filetitle": "Leaf textures", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Habel_2007_RTT-Leaf textures.zip", "type": "application/x-zip", "size": 39225136, "path": "Publication:Habel_2007_RTT", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Leaf textures.zip", "thumb_image_sizes": [] }, { "description": "Physically Based Real-Time Translucency for Leaves", "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Habel_2007_RTT-Preprint.pdf", "type": "application/pdf", "size": 8379881, "path": "Publication:Habel_2007_RTT", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Preprint:thumb{{size}}.png" }, { "description": "Physically based translucency on a tree", "filetitle": "Screenshot", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1018, "image_height": 742, "name": "Habel_2007_RTT-Screenshot.png", "type": "image/png", "size": 986183, "path": "Publication:Habel_2007_RTT", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Screenshot.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Screenshot:thumb{{size}}.png" }, { "description": "Video and Screenshots", "filetitle": "Video", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Habel_2007_RTT-Video.zip", "type": "application/x-zip", "size": 70074419, "path": "Publication:Habel_2007_RTT", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/Habel_2007_RTT-Video.zip", "thumb_image_sizes": [] } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_RTT/", "__class": "Publication" }, { "id": "JESCHKE-2007-ISC", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive Smooth and Curved Shell Mapping", "date": "2007-06", "abstract": "Shell mapping is a technique to represent three-dimensional surface details. This is achieved by extruding the triangles of an existing mesh along their normals, and mapping a 3D function (e.g., a 3D texture) into the resulting\nprisms. Unfortunately, such a mapping is nonlinear. Previous approaches perform a piece-wise linear approximation\nby subdividing the prisms into tetrahedrons. However, such an approximation often leads to severe artifacts.\nIn this paper we present a correct (i.e., smooth) mapping that does not rely on a decomposition into tetrahedrons. We present an efficient GPU ray casting algorithm which provides correct parallax, self-occlusion, and silhouettes, at the cost of longer rendering times. The new formulation also allows modeling shells with smooth curvatures using Coons patches within the prisms. Tangent continuity between adjacent prisms is guaranteed, while the\nmapping itself remains local, i.e. every curved prism content is modeled at runtime in the GPU without the need\nfor any precomputation. This allows instantly replacing animated triangular meshes with prism-based shells.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 356, 407, 193 ], "booktitle": "Rendering Techniques 2007 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2007-06-25", "date_to": "2007-06-27", "editor": "Jan Kautz and Sumanta Pattanaik", "isbn": "978-3-905673-52-4", "lecturer": [ 356 ], "location": "Grenoble, France", "organization": "Eurographics", "pages": "10", "pages_from": "351", "pages_to": "360", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "Display algorithms", "Shading" ], "weblinks": [], "files": [ { "description": null, "filetitle": "additional images", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 882, "preview_image_height": 545, "name": "JESCHKE-2007-ISC-additional images.pdf", "type": "application/pdf", "size": 5691735, "path": "Publication:JESCHKE-2007-ISC", "preview_name": "JESCHKE-2007-ISC-additional images:preview.png", "preview_type": "image/jpeg", "preview_size": 393544, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-additional images.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-additional images:thumb{{size}}.png" }, { "description": "A shell-mapped cube", "filetitle": "cube", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1428, "image_height": 755, "name": "JESCHKE-2007-ISC-cube.jpg", "type": "image/jpeg", "size": 567817, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-cube.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-cube:thumb{{size}}.png" }, { "description": "A shell-mapped and environment-mapped sphere", "filetitle": "EnvMapI", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1018, "image_height": 759, "name": "JESCHKE-2007-ISC-EnvMapI.jpg", "type": "image/jpeg", "size": 160109, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-EnvMapI.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-EnvMapI:thumb{{size}}.png" }, { "description": "Closeup of a shell-mapped and environment-mapped sphere", "filetitle": "EnvMapII", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1190, "image_height": 521, "name": "JESCHKE-2007-ISC-EnvMapII.jpg", "type": "image/jpeg", "size": 551482, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-EnvMapII.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-EnvMapII:thumb{{size}}.png" }, { "description": "Mapping between prisms in texture and world space", "filetitle": "Mapping", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1190, "image_height": 485, "name": "JESCHKE-2007-ISC-Mapping.jpg", "type": "image/jpeg", "size": 416777, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-Mapping.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-Mapping:thumb{{size}}.png" }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "JESCHKE-2007-ISC-Preprint.pdf", "type": "application/pdf", "size": 8140215, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-Preprint:thumb{{size}}.png" }, { "description": "Correct shadowing with shell mapping", "filetitle": "shadow", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1004, "image_height": 761, "name": "JESCHKE-2007-ISC-shadow.jpg", "type": "image/jpeg", "size": 578643, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-shadow.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-shadow:thumb{{size}}.png" }, { "description": "Shell mapped teapot with different textures", "filetitle": "teapots", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2430, "image_height": 1503, "name": "JESCHKE-2007-ISC-teapots.jpg", "type": "image/jpeg", "size": 2023239, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-teapots.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-teapots:thumb{{size}}.png" }, { "description": "Tiger model with a furry shell map", "filetitle": "tiger", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1178, "image_height": 635, "name": "JESCHKE-2007-ISC-tiger.jpg", "type": "image/jpeg", "size": 851634, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-tiger.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-tiger:thumb{{size}}.png" }, { "description": "A shell-mapped torus", "filetitle": "torus", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 948, "image_height": 723, "name": "JESCHKE-2007-ISC-torus.jpg", "type": "image/jpeg", "size": 223018, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-torus.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-torus:thumb{{size}}.png" }, { "description": "Inside view in a torus with different shell maps applied", "filetitle": "torusinside", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2537, "image_height": 1947, "name": "JESCHKE-2007-ISC-torusinside.jpg", "type": "image/jpeg", "size": 3282879, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-torusinside.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-torusinside:thumb{{size}}.png" }, { "description": "Shell mapped torus. Left: smooth mapping. Right: curved mapping.", "filetitle": "TorusSmoothCurved", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1981, "image_height": 995, "name": "JESCHKE-2007-ISC-TorusSmoothCurved.jpg", "type": "image/jpeg", "size": 1382791, "path": "Publication:JESCHKE-2007-ISC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-TorusSmoothCurved.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-TorusSmoothCurved:thumb{{size}}.png" }, { "description": null, "filetitle": "video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 880, "preview_image_height": 763, "name": "JESCHKE-2007-ISC-video.mov", "type": "video/quicktime", "size": 31996834, "path": "Publication:JESCHKE-2007-ISC", "preview_name": "JESCHKE-2007-ISC-video:preview.png", "preview_type": "image/jpeg", "preview_size": 374545, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-video.mov", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/JESCHKE-2007-ISC-video:video.mp4" } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/JESCHKE-2007-ISC/", "__class": "Publication" }, { "id": "Scherzer-2007-PCS", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Pixel-Correct Shadow Maps with Temporal Reprojection and Shadow Test Confidence", "date": "2007-06", "abstract": "Shadow mapping suffers from spatial aliasing (visible as blocky shadows) as well as temporal aliasing (visible as flickering). Several methods have already been proposed for reducing such artifacts, but so far none is able to provide satisfying results in real time.\n\nThis paper extends shadow mapping by reusing information of previously rasterized images, stored efficiently in a so-called history buffer. This buffer is updated in every frame and then used for the shadow calculation. In combination with a special confidence-based method for the history buffer update (based on the current shadow map), temporal and spatial aliasing can be completely removed. The algorithm converges in about 10 to 60 frames and during convergence, shadow borders are sharpened over time. Consequently, in case of real-time frame rates, the temporal shadow adaption is practically imperceptible. The method is simple to implement and is as fast as uniform shadow mapping, incurring only the minor speed hit of the history buffer update. It works together with advanced filtering methods like percentage closer filtering and more advanced shadow mapping techniques like perspective or light space perspective shadow maps.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Pixel-correct shadow maps as a result of using a shadow map (size 10242) with shadow test confidence together with a history buffer. Note that projection and perspective aliasing are completely removed.", "filetitle": "image1", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1576, "image_height": 1024, "name": "Scherzer-2007-PCS-image1.png", "type": "image/png", "size": 1924365, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image1.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image1:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 452, 356, 193 ], "booktitle": "Rendering Techniques 2007 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2007-06-25", "date_to": "2007-06-27", "editor": "Jan Kautz and Sumanta Pattanaik", "isbn": "978-3-905673-52-4", "lecturer": [ 452 ], "location": "Grenoble, France", "organization": "Eurographics", "pages_from": "45", "pages_to": "50", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "shadow mapping" ], "weblinks": [], "files": [ { "description": "Pixel-correct shadow maps as a result of using a shadow map (size 10242) with shadow test confidence together with a history buffer. Note that projection and perspective aliasing are completely removed.", "filetitle": "image1", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1576, "image_height": 1024, "name": "Scherzer-2007-PCS-image1.png", "type": "image/png", "size": 1924365, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image1.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image1:thumb{{size}}.png" }, { "description": "In this figure we used our new shadow mapping technique (PCSM) toshow that even scenarios were projection aliasing is the dominant source of error, we can produce the correct shadowing solution.", "filetitle": "image2", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1576, "image_height": 1024, "name": "Scherzer-2007-PCS-image2.png", "type": "image/png", "size": 1857584, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image2.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image2:thumb{{size}}.png" }, { "description": "In this figure we used our new shadow mapping technique (PCSM) toshow that even scenarios were projection aliasing is the dominant source of error, we can produce the correct shadowing solution.", "filetitle": "image3", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1576, "image_height": 1024, "name": "Scherzer-2007-PCS-image3.png", "type": "image/png", "size": 783356, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image3.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image3:thumb{{size}}.png" }, { "description": "New fragments (shown in red) without history that result from a camera translation.", "filetitle": "image4", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1280, "image_height": 684, "name": "Scherzer-2007-PCS-image4.png", "type": "image/png", "size": 619467, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image4.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-image4:thumb{{size}}.png" }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Scherzer-2007-PCS-Preprint.pdf", "type": "application/pdf", "size": 8878009, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-Preprint:thumb{{size}}.png" }, { "description": null, "filetitle": "video", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Scherzer-2007-PCS-video.wmv", "type": "text/plain", "size": 30221796, "path": "Publication:Scherzer-2007-PCS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/Scherzer-2007-PCS-video.wmv", "thumb_image_sizes": [] } ], "projects_workgroups": [ "CROSSMOD" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Scherzer-2007-PCS/", "__class": "Publication" }, { "id": "TR-186-2-07-07", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "The Event Tunnel: Interactive Visualization of Complex Event Streams for Business Process Pattern Analysis", "date": "2007-05", "abstract": "Event-based systems are gaining increasing popularity for building loosely coupled and distributed systems. Since business processes are becoming more interconnected and event-driven, event-based systems fit well for supporting and monitoring business processes. In this paper, we present an event-based business intelligence tool, the Event Tunnel framework. It provides an interactive visualization of event streams to support business analysts in exploring business cases and business processes. The visualization is based on the metaphor of considering the event stream as a cylindrical tunnel, which is presented to the user from multiple perspectives. In the Event Tunnel, relevant business events are laid out and depicted for analysts. The information of single events is encoded in event glyphs that allow for a selective mapping of event attributes to colors, size and position. Different policies for the placement of the events in the tunnel as well as a clustering mechanism generate various views on historical event data. The event tunnel is able to display the relationships between events. This facilitates users to discover root causes and causal dependencies of event patterns. Our framework couples the event-tunnel visualization with query tools that allow users to search for relevant events within a data repository. Using query, filter and highlighting operations the analyst can navigate through the Event Tunnel until the required information or event patterns become visible. We demonstrate our approach with use cases from the fraud management and logistics domain.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 714, "name": "TR-186-2-07-07-.png", "type": "image/png", "size": 461051, "path": "Publication:TR-186-2-07-07", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/TR-186-2-07-07-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/TR-186-2-07-07-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 665, 666, 667, 166 ], "number": "TR-186-2-07-07", "research_areas": [], "keywords": [ "business process visualization", "query-driven visualization", "complex event processing" ], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 714, "name": "TR-186-2-07-07-.png", "type": "image/png", "size": 461051, "path": "Publication:TR-186-2-07-07", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/TR-186-2-07-07-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/TR-186-2-07-07-:thumb{{size}}.png" }, { "description": "", "filetitle": "technical report", "main_file": true, "use_in_gallery": false, "access": "public", "name": "TR-186-2-07-07-technical report.pdf", "type": "application/pdf", "size": 1956382, "path": "Publication:TR-186-2-07-07", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/TR-186-2-07-07-technical report.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/TR-186-2-07-07-technical report:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-07/", "__class": "Publication" }, { "id": "MATTAUSCH-2007-OSP", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Optimized Subdivisions for Preprocessed Visibility", "date": "2007-05", "abstract": "This paper describes a new tool for preprocessed visibility. It puts together view space and object space partitioning in order to control the render cost and memory cost of the visibility description generated by a visibility solver. The presented method progressively refines view space and object space subdivisions while minimizing the associated render and memory costs. Contrary to previous techniques, both subdivisions are driven by actual visibility information. We show that treating view space and object space together provides a powerful method for controlling the efficiency of the resulting visibility data structures.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 735, "image_height": 880, "name": "MATTAUSCH-2007-OSP-.png", "type": "image/png", "size": 210985, "path": "Publication:MATTAUSCH-2007-OSP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 326, 198, 194, 193 ], "booktitle": "Proceedings of Graphics Interface 2007", "date_from": "2007-05-28", "date_to": "2007-05-30", "editor": "Christopher G. Healey and Edward Lank", "isbn": "978-1-56881-337-0", "lecturer": [ 326 ], "location": "Montreal, Canada", "pages_from": "335", "pages_to": "342", "publisher": "Canadian Human-Computer Communications Society", "research_areas": [ "Rendering" ], "keywords": [ "visibility preprocessing", "potentially visible sets", "view cells" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 735, "image_height": 880, "name": "MATTAUSCH-2007-OSP-.png", "type": "image/png", "size": 210985, "path": "Publication:MATTAUSCH-2007-OSP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-:thumb{{size}}.png" }, { "description": null, "filetitle": "Graphics Interface Slides", "main_file": false, "use_in_gallery": false, "access": "public", "name": "MATTAUSCH-2007-OSP-Graphics Interface Slides.ppt", "type": "application/msword", "size": 7805440, "path": "Publication:MATTAUSCH-2007-OSP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-Graphics Interface Slides.ppt", "thumb_image_sizes": [] }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "MATTAUSCH-2007-OSP-Preprint.pdf", "type": "application/pdf", "size": 2519208, "path": "Publication:MATTAUSCH-2007-OSP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/MATTAUSCH-2007-OSP-Preprint:thumb{{size}}.png" } ], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MATTAUSCH-2007-OSP/", "__class": "Publication" }, { "id": "balabanian-2007-ant", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Sonar Explorer: A New Tool for Visualization of Fish Schools from 3D Sonar Data", "date": "2007-05", "abstract": "We present a novel framework for analysis and visualization of fish schools in 3D sonar surveys. The 3D sonar\r\ntechnology is new and there have not been applications to visualize the data in 3D. We have created an application\r\ncalled Sonar Explorer that satisfies the requirements of domain scientists. Sonar Explorer provides easy\r\nand intuitive semi-automatic fish school tracking and survey map generation. The overall pipeline is described\r\nand all pipeline stages relevant for visualization are highlighted. We present techniques to deal with 3D sonar\r\ndata specifics: highly anisotropic volume data aligned on a curvilinear grid. Domain scientists provide initial\r\nimpressions on interaction and outlook.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 397, "image_height": 275, "name": "balabanian-2007-ant-image.jpg", "type": "image/jpeg", "size": 25071, "path": "Publication:balabanian-2007-ant", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/balabanian-2007-ant-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/balabanian-2007-ant-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 673, 171, 674, 675, 166 ], "booktitle": "Data Visualization - EuroVis 2007", "date_from": "2007-05-23", "date_to": "2007-05-25", "editor": "K. Museth, T. Möller, A. Ynnerman", "isbn": "9783905673456", "lecturer": [ 673 ], "location": "Norköpping, Schweden", "pages_from": "155", "pages_to": "162", "publisher": "IEEE", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 397, "image_height": 275, "name": "balabanian-2007-ant-image.jpg", "type": "image/jpeg", "size": 25071, "path": "Publication:balabanian-2007-ant", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/balabanian-2007-ant-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/balabanian-2007-ant-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "balabanian-2007-ant-paper.pdf", "type": "application/pdf", "size": 540559, "path": "Publication:balabanian-2007-ant", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/balabanian-2007-ant-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/balabanian-2007-ant-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/balabanian-2007-ant/", "__class": "Publication" }, { "id": "malik-2007-FP", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Feature Peeling", "date": "2007-05", "abstract": "We present a novel rendering algorithm that analyses the ray profiles along the line of sight. The profiles are subdivided according to encountered peaks and valleys at so called transition points. The sensitivity of these transition points is calibrated via two thresholds. The slope threshold is based on the magnitude of a peak following a valley, while the peeling threshold measures the depth of the transition point relative to the neighboring rays. This technique separates the dataset into a number of feature layers. The user can scroll through the layers inspecting various features from the current view position. While our technique has been inspired by opacity peeling approach, we demonstrate that we can reveal detectable features even in the third and fourth layers for both CT and MRI datasets.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1024, "image_height": 1024, "name": "malik-2007-FP-.png", "type": "image/png", "size": 450032, "path": "Publication:malik-2007-FP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 607, 196, 166 ], "address": "Favoritenstrasse 9-11 / E186, A-1040 Wien, Austria", "booktitle": "Proceedings of Graphics Interface 2007", "isbn": "978-1-56881-337-0", "lecturer": [ 607 ], "pages_from": "273", "pages_to": "280", "publisher": "A K Peters Ltd", "research_areas": [], "keywords": [ "volume visualization", "ray analysis", "feature peeling" ], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1024, "image_height": 1024, "name": "malik-2007-FP-.png", "type": "image/png", "size": 450032, "path": "Publication:malik-2007-FP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "malik-2007-FP-paper.pdf", "type": "application/pdf", "size": 20190827, "path": "Publication:malik-2007-FP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-paper:thumb{{size}}.png" }, { "description": "", "filetitle": "Video", "main_file": false, "use_in_gallery": false, "access": "public", "name": "malik-2007-FP-Video.avi", "type": "", "size": 11972096, "path": "Publication:malik-2007-FP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/malik-2007-FP-Video.avi", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/malik-2007-FP/", "__class": "Publication" }, { "id": "WIMMER-2007-RTR", "type_id": "habilthesis", "tu_id": null, "repositum_id": null, "title": "Real-Time Rendering", "date": "2007-05", "abstract": "Real-time rendering is concerned with the display of computer-generated images at rates which let a human observer believe that she is looking at a smooth animation. This thesis deals with several contributions to the field of real-time rendering that improve either the performance of rendering algorithms or the quality of the displayed images.\n\nLight-Space Perspective Shadow Maps improve the quality of real-time rendering by providing better looking shadow rendering, one of the most popular research topics in real-time rendering. Conversely, Coherent Hierarchical Culling and Guided Visibility Sampling improve the performance of real-time rendering through visibility culling. One is designed for runtime computation and the other for preprocessing. Finally, real-time rendering is extended from traditional polygon rendering to a new type of dataset that has recently gained importance, namely point clouds, especially huge datasets that cannot be loaded into main memory.\n\n", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 576, "image_height": 187, "name": "WIMMER-2007-RTR-.png", "type": "image/png", "size": 11119, "path": "Publication:WIMMER-2007-RTR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/WIMMER-2007-RTR-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/WIMMER-2007-RTR-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193 ], "date_end": "2007", "date_start": "2001", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 576, "image_height": 187, "name": "WIMMER-2007-RTR-.png", "type": "image/png", "size": 11119, "path": "Publication:WIMMER-2007-RTR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/WIMMER-2007-RTR-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/WIMMER-2007-RTR-:thumb{{size}}.png" }, { "description": null, "filetitle": "Habilitation Thesis", "main_file": false, "use_in_gallery": false, "access": "public", "name": "WIMMER-2007-RTR-Habilitation Thesis.pdf", "type": "application/pdf", "size": 18506289, "path": "Publication:WIMMER-2007-RTR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/WIMMER-2007-RTR-Habilitation Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/WIMMER-2007-RTR-Habilitation Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-RTR/", "__class": "Publication" }, { "id": "burns-2007-fea", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Feature Emphasis and Contextual Cutaways for Multimodal Medical Visualization", "date": "2007-05", "abstract": "Dense clinical data like 3D Computed Tomography (CT) scans can be visualized together with real-time imaging\nfor a number of medical intervention applications. However, it is difficult to provide a fused visualization that\nallows sufficient spatial perception of the anatomy of interest, as derived from the rich pre-operative scan, while\nnot occluding the real-time image displayed embedded within the volume.\nWe propose an importance-driven approach that presents the embedded data such that it is clearly visible along\nwith its spatial relation to the surrounding volumetric material. To support this, we present and integrate novel\ntechniques for importance specification, feature emphasis, and contextual cutaway generation.\nWe show results in a clinical context where a pre-operative CT scan is visualized alongside a tracked ultrasound\nimage, such that the important vasculature is depicted between the viewpoint and the ultrasound image, while a\nmore opaque representation of the anatomy is exposed in the surrounding area.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 325, "image_height": 308, "name": "burns-2007-fea-image.jpg", "type": "image/jpeg", "size": 39551, "path": "Publication:burns-2007-fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 676, 597, 677, 171, 166 ], "booktitle": "Proceedings of Eurographics / IEEE VGTC Symposium on Visualization (EuroVis 2007)", "date_from": "2007-05-23", "date_to": "2007-05-25", "editor": "K. Museth, T. Möller, A. Ynnerman", "isbn": "9783905673456", "lecturer": [ 676 ], "location": "Norköpping, Schweden", "pages_from": "275", "pages_to": "282", "publisher": "IEEE", "research_areas": [ "MedVis" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 325, "image_height": 308, "name": "burns-2007-fea-image.jpg", "type": "image/jpeg", "size": 39551, "path": "Publication:burns-2007-fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "burns-2007-fea-paper.pdf", "type": "application/pdf", "size": 11414491, "path": "Publication:burns-2007-fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-paper:thumb{{size}}.png" }, { "description": null, "filetitle": "presentation", "main_file": false, "use_in_gallery": false, "access": "public", "name": "burns-2007-fea-presentation.pdf", "type": "application/pdf", "size": 16305663, "path": "Publication:burns-2007-fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-presentation.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-presentation:thumb{{size}}.png" }, { "description": null, "filetitle": "videos", "main_file": false, "use_in_gallery": false, "access": "public", "name": "burns-2007-fea-videos.zip", "type": "application/zip", "size": 21424680, "path": "Publication:burns-2007-fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/burns-2007-fea-videos.zip", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/burns-2007-fea/", "__class": "Publication" }, { "id": "GIEGL-2007-FVS", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Fitted Virtual Shadow Maps", "date": "2007-05", "abstract": "Too little shadow map resolution and resulting undersampling artifacts, perspective and projection aliasing, have long been a fundamental problem of shadowing scenes with shadow mapping.\n\nWe present a new smart, real-time shadow mapping algorithm that virtually increases the resolution of the shadow map beyond the GPU hardware limit where needed. We first sample the scene from the eye-point on the GPU to get the needed shadow map resolution in different parts of the scene. We then process the resulting data on the CPU and finally arrive at a hierarchical grid structure, which we traverse in kd-tree fashion, shadowing the scene with shadow map tiles where needed.\n\nShadow quality can be traded for speed through an intuitive parameter, with a homogeneous quality reduction in the whole scene, down to normal shadow mapping. This allows the algorithm to be used on a wide range of hardware.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 976, "image_height": 938, "name": "GIEGL-2007-FVS-.png", "type": "image/png", "size": 804604, "path": "Publication:GIEGL-2007-FVS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/GIEGL-2007-FVS-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/GIEGL-2007-FVS-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 402, 193 ], "booktitle": "Proceedings of Graphics Interface 2007", "date_from": "2007-05-28", "date_to": "2007-05-30", "editor": "Christopher G. Healey and Edward Lank", "isbn": "978-1-56881-337-0", "lecturer": [ 402 ], "location": "Montreal, Canada", "pages_from": "159", "pages_to": "168", "publisher": "Canadian Human-Computer Communications Society", "research_areas": [ "Rendering" ], "keywords": [ "real-time shadowing", "shadows", "shadow maps", "large environemnts" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 976, "image_height": 938, "name": "GIEGL-2007-FVS-.png", "type": "image/png", "size": 804604, "path": "Publication:GIEGL-2007-FVS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/GIEGL-2007-FVS-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/GIEGL-2007-FVS-:thumb{{size}}.png" }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "GIEGL-2007-FVS-Preprint.pdf", "type": "application/pdf", "size": 5719113, "path": "Publication:GIEGL-2007-FVS", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/GIEGL-2007-FVS-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/GIEGL-2007-FVS-Preprint:thumb{{size}}.png" } ], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-FVS/", "__class": "Publication" }, { "id": "TR-186-2-07-08", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Illustrative rendering of seismic data", "date": "2007-05", "abstract": "We present multi attribute texture transfer functions for the generation of seismic illustrations. We render seismic data in the style of geological textbook illustrations by combining illustratively rendered axis aligned slices with volume rendering. We have extended the transfer function concept to map volume attributes to 2D textures that flow according to a deformation volume describing the buckling and discontinuites of the layers of the seismic data. Faults in the seismic layers are represented by texture disruptions. \n", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1492, "image_height": 2630, "name": "TR-186-2-07-08-.jpg", "type": "image/jpeg", "size": 319353, "path": "Publication:TR-186-2-07-08", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/TR-186-2-07-08-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/TR-186-2-07-08-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 616, 668, 669, 166 ], "number": "TR-186-2-07-08", "research_areas": [ "IllVis" ], "keywords": [ "Seismic illustration", "Texture transfer function", "Texture mapping" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1492, "image_height": 2630, "name": "TR-186-2-07-08-.jpg", "type": "image/jpeg", "size": 319353, "path": "Publication:TR-186-2-07-08", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/TR-186-2-07-08-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/TR-186-2-07-08-:thumb{{size}}.png" }, { "description": "Techniques for rendering seismic data in the style of geological illustrations are investigated", "filetitle": "Ill. rendering of seismic data", "main_file": true, "use_in_gallery": true, "access": "public", "preview_image_width": 1492, "preview_image_height": 2630, "name": "TR-186-2-07-08-Ill. rendering of seismic data.pdf", "type": "application/pdf", "size": 3545846, "path": "Publication:TR-186-2-07-08", "preview_name": "TR-186-2-07-08-Ill. rendering of seismic data:preview.png", "preview_type": "image/jpeg", "preview_size": 319353, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/TR-186-2-07-08-Ill. rendering of seismic data.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/TR-186-2-07-08-Ill. rendering of seismic data:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-08/", "__class": "Publication" }, { "id": "TR-186-2-07-06", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Surface Extraction from Multi-Material Components for Metrology using Dual Energy CT", "date": "2007-05", "abstract": "This paper describes a novel method for creating surface\r\nmodels of multi-material components using dual energy\r\ncomputed tomography (DECT). Application scenario\r\nfor the presented work is metrology and dimensional\r\nmeasurement of multi-material components in industrial\r\nhigh resolution 3D X-Ray computed tomography\r\n(3DCT). The basis of this method is the dual source\r\n/ dual exposure technology using the different X-Ray\r\nimaging modalities of a high precision micro-focus and\r\na high energy macro-focus X-Ray source.\r\nThe presented work aims at combining the advantages\r\nof both X-Ray modalities in order to facilitate dimensional\r\nmeasurement of multi-material components with\r\nhigh density material within low density material. We\r\npropose a pipeline model using image fusion and local\r\nsurface extraction technologies: A prefiltering step reduces\r\ndata inherent noise. For image fusion purposes\r\nthe datasets have to be registered to each other. In the fusion\r\nstep the benefits of each modality are combined. So\r\nthe structure of the specimen is taken from the low precision,\r\nblurry, high energy dataset while the sharp edges\r\nare adopted and fused into the resulting image from the\r\nhigh precision, crisp, low energy dataset. In the final\r\nstep a reliable surface model is calculated of the fused\r\ndataset, which locally adapts the surface model by moving\r\nsurface vertices in the direction of the corresponding\r\npoint normal to a position with maximum gradient magnitude.\r\nThe major contribution of this paper is the development\r\nof a specific workflow for dimensional measurement of multi-material industrial components from high resolution\r\nindustrial CT data. Several algorithms are extended\r\nto take two data sources with complementary strengths\r\nand weaknesses into account. The presented workflow\r\nis crucial for the following visual inspection of deviations.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 512, "image_height": 512, "name": "TR-186-2-07-06-.jpg", "type": "image/jpeg", "size": 108503, "path": "Publication:TR-186-2-07-06", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/TR-186-2-07-06-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/TR-186-2-07-06-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 611, 613, 166 ], "number": "TR-186-2-07-06", "research_areas": [], "keywords": [ "DECT image fusion", "local surface extraction", "metrology", "Dual Energy CT", "dimensional measurement", "variance comparison" ], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 512, "image_height": 512, "name": "TR-186-2-07-06-.jpg", "type": "image/jpeg", "size": 108503, "path": "Publication:TR-186-2-07-06", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/TR-186-2-07-06-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/TR-186-2-07-06-:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "TR-186-2-07-06-paper.pdf", "type": "application/pdf", "size": 1805191, "path": "Publication:TR-186-2-07-06", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/TR-186-2-07-06-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/TR-186-2-07-06-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "PVG" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-06/", "__class": "Publication" }, { "id": "LEHNINGER-2007-SSV", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Simulation von städtischem Verkehr", "date": "2007-04", "abstract": "The task of this thesis is the simulation of urban traffic.\r\n\r\nFor this purpose the traffic library TrafLib was developed. TrafLib is a multi-agent, micro simulation for urban traffic. It is suitable for visualisation, e.g. urban visualisation software, driving simulators, computer games, virtual reality software, and so on. It enhances them and makes them more attractive.\r\n\r\nTrafLib requires a road-network in the form of an input file. The input file must contain the description of roads and crossings, and optionally traffic lights and traffic signs. Additionally to the own file description format, the format of VRMG is also supported. VRMG is a program for creating geometry of large road-networks.\r\n\r\nThe problem of traffic calculation is solved by handling traffic rules according to the Highway Code and the “Car-Following-Theory”. The vehicles are modelled as autonomous agents. Human characteristics are imitated by three different types of driving-behaviour (cautious, normal, aggressive).\r\n\r\nThe movement of the vehicles takes place on 1-dimensional lanes. This reduces the flexibility a little, but simplifies the calculation a lot.\r\n\r\nTrafLib is able to simulate more than 5000 vehicles on a road network of the size of 3 times 3 km in real-time on a standard-PC.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 684 ], "supervisor": [ 193 ], "research_areas": [], "keywords": [ "traffic simulation", "real-time rendering" ], "weblinks": [], "files": [ { "description": "", "filetitle": "thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "LEHNINGER-2007-SSV-thesis.pdf", "type": "application/pdf", "size": 1537458, "path": "Publication:LEHNINGER-2007-SSV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LEHNINGER-2007-SSV/LEHNINGER-2007-SSV-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/LEHNINGER-2007-SSV/LEHNINGER-2007-SSV-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LEHNINGER-2007-SSV/", "__class": "Publication" }, { "id": "GIEGL-2007-QV1", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Queried Virtual Shadow Maps", "date": "2007-04", "abstract": "Shadowing scenes by shadow mapping has long suffered from the fundamental problem of undersampling artifacts due to too low shadow map resolution, leading to so-called perspective and projection aliasing.\n\nIn this paper we present a new real-time shadow mapping algorithm capable of shadowing large scenes by virtually increasing the resolution of the shadow map beyond the GPU hardware limit.\n\nWe start with a brute force approach that uniformly increases the resolution of the whole shadow map. We then introduce a smarter version which greatly increases runtime performance while still being GPU-friendly. The algorithm contains an easy to use performance/quality-tradeoff parameter, making it tunable to a wide range of graphics hardware.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 894, "image_height": 348, "name": "GIEGL-2007-QV1-.jpg", "type": "image/jpeg", "size": 91003, "path": "Publication:GIEGL-2007-QV1", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/GIEGL-2007-QV1-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/GIEGL-2007-QV1-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 402, 193 ], "address": "New York, NY, USA", "booktitle": "Proceedings of ACM SIGGRAPH 2007 Symposium on Interactive 3D Graphics and Games", "date_from": "2007-04-30", "date_to": "2007-05-02", "isbn": "978-1-59593-628-8", "lecturer": [ 618 ], "location": "Seattle, WA", "pages_from": "65", "pages_to": "72", "publisher": "ACM Press", "research_areas": [ "Rendering" ], "keywords": [ "shadow maps", "shadows", "real-time shadowing", "large environemnts" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 894, "image_height": 348, "name": "GIEGL-2007-QV1-.jpg", "type": "image/jpeg", "size": 91003, "path": "Publication:GIEGL-2007-QV1", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/GIEGL-2007-QV1-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/GIEGL-2007-QV1-:thumb{{size}}.png" }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "GIEGL-2007-QV1-Preprint.pdf", "type": "application/pdf", "size": 8511263, "path": "Publication:GIEGL-2007-QV1", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/GIEGL-2007-QV1-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/GIEGL-2007-QV1-Preprint:thumb{{size}}.png" } ], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-QV1/", "__class": "Publication" }, { "id": "MANTLER-2007-DMBBC", "type_id": "poster", "tu_id": null, "repositum_id": null, "title": "Displacement Mapped Billboard Clouds", "date": "2007-04", "abstract": "This paper introduces displacement mapped billboard clouds (DMBBC), a new image-based rendering primitive for the fast display of geometrically complex objects at medium to far distances. The representation is based on the well-known billboard cloud (BBC) technique, which represents an object as several textured rectangles in order to dramatically reduce its geometric complexity. Our new method uses boxes instead of rectangles, each box representing a volumetric part of the model. Rendering the contents of a box is done entirely on the GPU using ray casting. DMBBCs will often obviate the need to switch to full geometry for closer distances, which is especially helpful for scenes that are densely populated with complex objects, e.g. for vegetation scenes. We show several ways to store the volumetric information, with different tradeoffs between memory requirements and image quality. In addition we discuss techniques to accelerate the ray casting algorithm, and a way for smoothly switching between DMBBCs for medium distances and BBCs for far distances.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 654, "image_height": 518, "name": "MANTLER-2007-DMBBC-.jpg", "type": "image/jpeg", "size": 109174, "path": "Publication:MANTLER-2007-DMBBC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/MANTLER-2007-DMBBC-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/MANTLER-2007-DMBBC-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 407, 356, 193 ], "date_from": "2007-04-30", "date_to": "2007-05-02", "event": "Symposium on Interactive 3D Graphics and Games", "research_areas": [ "Rendering" ], "keywords": [ "rendering acceleration", "billboard clouds", "image-based rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 654, "image_height": 518, "name": "MANTLER-2007-DMBBC-.jpg", "type": "image/jpeg", "size": 109174, "path": "Publication:MANTLER-2007-DMBBC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/MANTLER-2007-DMBBC-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/MANTLER-2007-DMBBC-:thumb{{size}}.png" }, { "description": "pdf", "filetitle": "poster", "main_file": true, "use_in_gallery": false, "access": "public", "name": "MANTLER-2007-DMBBC-poster.pdf", "type": "application/pdf", "size": 9963258, "path": "Publication:MANTLER-2007-DMBBC", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/MANTLER-2007-DMBBC-poster.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/MANTLER-2007-DMBBC-poster:thumb{{size}}.png" } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/MANTLER-2007-DMBBC/", "__class": "Publication" }, { "id": "shi-2007-pla", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Path Line Attributes - an Information Visualization Approach to Analyzing the Dynamic Behavior of 3D Time-Dependent Flow Fields", "date": "2007-03", "abstract": "We describe an approach to visually analyzing the dynamic behavior of 3D\r\ntime-dependent flow fields by considering the behavior of the path lines. At\r\nselected positions in the 4D space-time domain, we compute a number of local\r\nand global properties of path lines describing relevant features of them. The\r\nresulting multivariate data set is analyzed by applying state-of-the-art information\r\nvisualization approaches in the sense of a set of linked views (scatter\r\nplots, parallel coordinates, etc.) with interactive brushing and focus+context\r\nvisualization. The selected path lines with certain properties are integrated\r\nand visualized as colored 3D curves. This approach allows an interactive exploration\r\nof intricate 4D flow structures. We apply our method to a number\r\nof flow data sets and describe how path line attributes are used for describing\r\ncharacteristic features of these flows.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 711, 712, 176, 713, 235, 714, 312 ], "booktitle": "Proceedings of TopoInVis 2007", "date_from": "2007-03-04", "date_to": "2007-03-06", "lecturer": [ 711 ], "location": "Leipzig, Germany", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "shi-2007-pla-paper.pdf", "type": "application/pdf", "size": 3323873, "path": "Publication:shi-2007-pla", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/shi-2007-pla/shi-2007-pla-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/shi-2007-pla/shi-2007-pla-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/shi-2007-pla/", "__class": "Publication" }, { "id": "GIEGL-2007-UNP", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Unpopping: Solving the Image-Space Blend Problem for Smooth Discrete LOD Transitions", "date": "2007-03", "abstract": "This paper presents a new, simple and practical algorithm to avoid artifacts when switching between discrete levels of detail (LOD) by smoothly blending LOD representations in image space. We analyze the alternatives of conventional alpha-blending and so-called late-switching (the switching of LODs markusquote{far enough} from the eye-point), widely thought to solve the LOD switching discontinuity problem, and conclude that they either do not work in practice, or defeat the concept of LODs. In contrast we show that our algorithm produces visually pleasing blends for static and animated discrete LODs, for discrete LODs with different types of LOD representations (e.g. billboards and meshes) and even to some extent totally different objects with similar spatial extent, with a very small runtime overhead.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "Unpopping", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1181, "image_height": 351, "name": "GIEGL-2007-UNP-Unpopping.png", "type": "image/png", "size": 37823, "path": "Publication:GIEGL-2007-UNP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/GIEGL-2007-UNP-Unpopping.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/GIEGL-2007-UNP-Unpopping:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 402, 193 ], "issn": "0167-7055", "journal": "Computer Graphics Forum", "number": "1", "pages_from": "46", "pages_to": "49", "volume": "26", "research_areas": [ "Rendering" ], "keywords": [ "popping", "LOD switching", "levels of detail", "real-time rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "GIEGL-2007-UNP-Preprint.pdf", "type": "application/pdf", "size": 142827, "path": "Publication:GIEGL-2007-UNP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/GIEGL-2007-UNP-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/GIEGL-2007-UNP-Preprint:thumb{{size}}.png" }, { "description": null, "filetitle": "Unpopping", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1181, "image_height": 351, "name": "GIEGL-2007-UNP-Unpopping.png", "type": "image/png", "size": 37823, "path": "Publication:GIEGL-2007-UNP", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/GIEGL-2007-UNP-Unpopping.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/GIEGL-2007-UNP-Unpopping:thumb{{size}}.png" } ], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/GIEGL-2007-UNP/", "__class": "Publication" }, { "id": "brandstaetter-2007-vosd", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Visualization of Online Sales Databases", "date": "2007-02", "abstract": "Information Visualization today offers a wide range of techniques and approaches that\r\ncan be used to visualize and analyze business data. For the task of visualizing online sales\r\ndatabases of a hardware vendor, this thesis discusses two fields of interest and presents\r\nexemplary solutions to certain objectives of analysis. On the one hand it will deal with\r\nthe visualization of users’ interaction in an online shop (Clickstream Visualization), presenting\r\nmeans of usage-data collection, its analysis and preparation as well as visualization.\r\nThereby, a prototype is developed that generates node-link diagrams of users’\r\nclickstreams. On the other hand this thesis introduces the novel approach of Parallel\r\nCoordinated Hierarchies – a linked view consisting of a Hierarchical List and Parallel Coordinates\r\nplots for every hierarchy, visualizing sales data like turnover and contribution\r\ngrouped by attributes like time and location. As the evaluation of the concepts showed,\r\nboth prototypes’ capabilities allowed greater insights in business data than tools already\r\nin use and facilitated advanced business analyses to a great extent.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 349, "image_height": 178, "name": "brandstaetter-2007-vosd-jpg.jpg", "type": "image/jpeg", "size": 40189, "path": "Publication:brandstaetter-2007-vosd", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/brandstaetter-2007-vosd-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/brandstaetter-2007-vosd-jpg:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 658 ], "supervisor": [ 166 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 349, "image_height": 178, "name": "brandstaetter-2007-vosd-jpg.jpg", "type": "image/jpeg", "size": 40189, "path": "Publication:brandstaetter-2007-vosd", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/brandstaetter-2007-vosd-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/brandstaetter-2007-vosd-jpg:thumb{{size}}.png" }, { "description": "", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "brandstaetter-2007-vosd-pdf.pdf", "type": "application/pdf", "size": 8167400, "path": "Publication:brandstaetter-2007-vosd", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/brandstaetter-2007-vosd-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/brandstaetter-2007-vosd-pdf:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/brandstaetter-2007-vosd/", "__class": "Publication" }, { "id": "TR-186-2-07-03", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Feature Peeling", "date": "2007-02", "abstract": "We present a novel rendering algorithm that analyses the ray profile along the line of sight during rendering and cuts it into layers, according to the peaks and valleys found, which we call transition points. The sensitivity of these transition points is calibrated via two thresholds. The slope threshold influences the magnitude of a peak following a valley, while the peeling threshold measures the depth of the transition point relative to the neighboring rays. This technique separates the dataset into a number of feature layers. The user can scroll through the layers inspecting various features from the current view position. While our technique has been inspired by opacity peeling approach [14], we demonstrate that we can reveal detectable features even in the third and forth layers for both, CT and MRI datasets.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 483, "image_height": 483, "name": "TR-186-2-07-03-.png", "type": "image/png", "size": 114535, "path": "Publication:TR-186-2-07-03", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/TR-186-2-07-03-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/TR-186-2-07-03-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 607, 196, 166 ], "number": "TR-186-2-07-03", "research_areas": [], "keywords": [ "transfer function", "volume visualization", "feature peeling", "ray analysis" ], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 483, "image_height": 483, "name": "TR-186-2-07-03-.png", "type": "image/png", "size": 114535, "path": "Publication:TR-186-2-07-03", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/TR-186-2-07-03-.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/TR-186-2-07-03-:thumb{{size}}.png" }, { "description": "", "filetitle": "Feature Peeling", "main_file": false, "use_in_gallery": false, "access": "public", "name": "TR-186-2-07-03-Feature Peeling.pdf", "type": "application/pdf", "size": 3170163, "path": "Publication:TR-186-2-07-03", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/TR-186-2-07-03-Feature Peeling.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/TR-186-2-07-03-Feature Peeling:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-03/", "__class": "Publication" }, { "id": "Ulbricht-2007-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Usability of Digital Cameras for Verifying Physically Based Rendering Systems ", "date": "2007-01-16", "abstract": "Das Ziel dieser Arbeit war es, eine einfache Szene so zu modellieren und zu rendern, dass sie so ident wie möglich zu einer digitalen Photographie ist. Dabei war klar, dass es viele Hindernisse zu überwinden galt, und den hauptsächlichen Wissensgewinn erhofften wir aus dem Verständnis für diese vielen kleinen Schritte zu erzielen. Schließlich stellten sich die Hindernisse noch umfangreicher dar als angenommen, und so schränkte sich das Thema auf die Verwendbarkeit digitaler Kameras für die Problemstellung inklusive die notwendigen Bearbeitungsschritte zur Vergleichbarkeit der Werte ein. Dabei entstand auch eine neue Methode entwickelt um die Abweichung der menschlichen Wahrnehmung von der Sensorik einer Kamera zu kompensieren. ", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 225 ], "date_end": "2007-01", "date_start": "2002-11", "rigorosum": "2007-01-16", "supervisor": [ 190, 192 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Ulbricht-2007-thesis-pdf.pdf", "type": "application/pdf", "size": 50564087, "path": "Publication:Ulbricht-2007-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Ulbricht-2007-thesis/Ulbricht-2007-thesis-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Ulbricht-2007-thesis/Ulbricht-2007-thesis-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Ulbricht-2007-thesis/", "__class": "Publication" }, { "id": "vucini_erald-2007-FRI", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Face Recognition under Varying Illumination", "date": "2007-01", "abstract": "This paper proposes a novel pipeline to develop a Face Recognition System robust to illumination variation. We consider the case when only one single image per person is available during the training phase. In order to utilize the superiority of Linear Discriminant Analysis (LDA) over Principal Component Analysis (PCA) in regard to variable illumination, a number of new images illuminated from different directions are synthesized from a single image by means of the Quotient Image. Furthermore, during the testing phase, an iterative algorithm is used for the restoration of frontal illumination of a face illuminated from any arbitrary angle. Experimental results on the YaleB database show that our approach can achieve a top recognition rate compared to existing methods and can be integrated into real time face recognition system.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "preview_image_width": 109, "preview_image_height": 116, "name": "vucini_erald-2007-FRI-Paper.pdf", "type": "application/pdf", "size": 588683, "path": "Publication:vucini_erald-2007-FRI", "preview_name": "vucini_erald-2007-FRI-Paper:preview.png", "preview_type": "image/jpeg", "preview_size": 4941, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/vucini_erald-2007-FRI/vucini_erald-2007-FRI-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/vucini_erald-2007-FRI/vucini_erald-2007-FRI-Paper:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 636, 637, 166 ], "address": "University of West Bohemia, Univerzitni 8, Box 314, CZ 306 14 Plzen, Czech Republic", "booktitle": "15th WSCG 2007", "date_from": "2007-01-29", "date_to": "2007-02-01", "editor": "Vaclav Skala", "isbn": "978-80-86943-01-5", "lecturer": [ 636 ], "location": "Plzen, Czech Republic", "note": "Full Paper", "organization": "WSCG", "pages_from": "57", "pages_to": "64", "publisher": "University of West Bohemia", "series": "WSCG’2007 Full Papers Proceedings", "research_areas": [], "keywords": [ "Dimensionality Reduction", "Face Recognition", "Image Synthesis", "Illumination Restoration" ], "weblinks": [], "files": [ { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "preview_image_width": 109, "preview_image_height": 116, "name": "vucini_erald-2007-FRI-Paper.pdf", "type": "application/pdf", "size": 588683, "path": "Publication:vucini_erald-2007-FRI", "preview_name": "vucini_erald-2007-FRI-Paper:preview.png", "preview_type": "image/jpeg", "preview_size": 4941, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/vucini_erald-2007-FRI/vucini_erald-2007-FRI-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/vucini_erald-2007-FRI/vucini_erald-2007-FRI-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "PVG" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/vucini_erald-2007-FRI/", "__class": "Publication" }, { "id": "TR-186-2-07-01", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Displacement Mapped Billboard Clouds", "date": "2007-01", "abstract": "This paper introduces displacement mapped billboard clouds (DMBBC), a new image-based rendering primitive for the fast display of geometrically complex objects at medium to far distances.\nThe representation is based on the well-known billboard cloud (BBC) technique, which represents an object as several textured rectangles in order to dramatically reduce its geometric complexity.\nOur new method uses boxes instead of rectangles, each box representing a volumetric part of the model. Rendering the contents of a box is done entirely on the GPU using ray casting. DMBBCs will often obviate the need to switch to full geometry for closer distances, which is especially helpful for scenes that are densely populated with complex objects, e.g. for vegetation scenes. We\nshow several ways to store the volumetric information, with different\ntradeoffs between memory requirements and image quality. In addition we discuss techniques to accelerate the ray casting algorithm, and a way for smoothly switching between DMBBCs for\nmedium distances and BBCs for far distances.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 407, 356, 193 ], "number": "TR-186-2-07-01", "research_areas": [ "Rendering" ], "keywords": [ "rendering acceleration", "billboard clouds", "image-based rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": true, "access": "public", "preview_image_width": 654, "preview_image_height": 518, "name": "TR-186-2-07-01-paper.pdf", "type": "application/pdf", "size": 7250838, "path": "Publication:TR-186-2-07-01", "preview_name": "TR-186-2-07-01-paper:preview.png", "preview_type": "image/jpeg", "preview_size": 304209, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-01/TR-186-2-07-01-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-01/TR-186-2-07-01-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/TR-186-2-07-01/", "__class": "Publication" }, { "id": "zotti-2007-wscg", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "A Critical Review of the Preetham Skylight Model", "date": "2007-01", "abstract": "The Preetham skylight model is currently one of the most widely used\n analytic models of skylight luminance in computer graphics.\n Despite its widespread use, very little work has been carried out to verify the results generated by the model, both in terms of the luminance patterns it generates, and in terms of numerical reliability and stability.\n\nWe have implemented the model in Mathematica, visualise and discuss those parameter ranges which exhibit problematic behaviour, and compare the computed luminance values with references from literature, especially the 15 standard skylight distributions of the CIE 2003 Standard General Sky.\n\nWe also performed luminance measurements on real cloudless skies, and compare these measurements to the predictions of the model.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 694, "image_height": 556, "name": "zotti-2007-wscg-image.png", "type": "image/png", "size": 12841, "path": "Publication:zotti-2007-wscg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/zotti-2007-wscg-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/zotti-2007-wscg-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222, 192, 190 ], "booktitle": "WSCG ", "date_from": "2007-01-29", "date_to": "2007-02-01", "editor": "Vaclav Skala", "isbn": "978-80-86943-02-2", "lecturer": [ 222 ], "location": "Plzen", "pages_from": "23", "pages_to": "30", "publisher": "University of West Bohemia", "research_areas": [ "Rendering" ], "keywords": [ "Verification", "Skylight" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 694, "image_height": 556, "name": "zotti-2007-wscg-image.png", "type": "image/png", "size": 12841, "path": "Publication:zotti-2007-wscg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/zotti-2007-wscg-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/zotti-2007-wscg-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "zotti-2007-wscg-paper.pdf", "type": "application/pdf", "size": 1608608, "path": "Publication:zotti-2007-wscg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/zotti-2007-wscg-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/zotti-2007-wscg-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "Skydome" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-wscg/", "__class": "Publication" }, { "id": "Kohlmann-2007-EBV", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Evaluation of a Bricked Volume Layout for a Medical Workstation based on Java", "date": "2007-01", "abstract": "Volumes acquired for medical examination purposes are constantly increasing in size. For this reason, the computer’s memory is the limiting factor for visualizing the data. Bricking is a well-known concept used for rendering large data sets. The volume data is subdivided into smaller blocks to achieve better memory utilization. Until now, the vast majority of medical workstations use a linear volume layout. We implemented a bricked volume layout for such a workstation based on Java as required by our collaborative company partner to evaluate different common access patterns to the volume data. For rendering, we were mainly interested to see how the performance will differ from the traditional linear volume layout if we generate images of arbitrarily\r\noriented slices via Multi-Planar Reformatting (MPR). Furthermore, we tested access patterns which are crucial for segmentation issues like a random access to data values and a simulated region growing. Our goal was to find out if it makes sense to change the volume layout of a medical workstation to benefit from bricking. We were also interested to identify the tasks where\r\nproblems might occur if bricking is applied. Overall, our results show that it is feasible to use a bricked volume layout in the stringent context of a medical workstation implemented in Java.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "mpr-views", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 600, "image_height": 474, "name": "Kohlmann-2007-EBV-mpr-views.jpg", "type": "image/jpeg", "size": 93449, "path": "Publication:Kohlmann-2007-EBV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/Kohlmann-2007-EBV-mpr-views.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/Kohlmann-2007-EBV-mpr-views:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 605, 161, 162, 166 ], "date_from": "2007-01-29", "date_to": "2007-02-01", "event": "WSCG 2007", "issn": "1213-6972", "journal": "Journal of WSCG", "lecturer": [ 605 ], "location": "Plzen, Czech Republic", "number": "1-3", "pages_from": "83", "pages_to": "90", "volume": "15", "research_areas": [], "keywords": [ "MPR", "Bricked Volume Layout", "Medical Visualization", "Medical Workstation" ], "weblinks": [], "files": [ { "description": "", "filetitle": "mpr-views", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 600, "image_height": 474, "name": "Kohlmann-2007-EBV-mpr-views.jpg", "type": "image/jpeg", "size": 93449, "path": "Publication:Kohlmann-2007-EBV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/Kohlmann-2007-EBV-mpr-views.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/Kohlmann-2007-EBV-mpr-views:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Kohlmann-2007-EBV-paper.pdf", "type": "application/pdf", "size": 1375913, "path": "Publication:Kohlmann-2007-EBV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/Kohlmann-2007-EBV-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/Kohlmann-2007-EBV-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "diagvis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Kohlmann-2007-EBV/", "__class": "Publication" }, { "id": "Habel_2007_IAG", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Instant Animated Grass", "date": "2007-01", "abstract": "This paper introduces a technique for rendering animated grass in real time. The technique uses front-to-back compositing of implicitly defined grass slices in a fragment shader and therefore significantly reduces the overhead associated with common vegetation rendering systems. We also introduce a texture-based animation scheme that combines global wind movements with local turbulences. Since the technique is confined to a fragment shader, it can be easily integrated into any rendering system and used as a material in existing scenes. ", "authors_et_al": false, "substitute": null, "main_image": { "description": "grass screenshot", "filetitle": "grass_screenshot", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 768, "name": "Habel_2007_IAG-grass_screenshot.jpg", "type": "image/jpeg", "size": 454916, "path": "Publication:Habel_2007_IAG", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-grass_screenshot.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-grass_screenshot:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 618, 193, 356 ], "date_from": "2007-01-29", "date_to": "2007-02-02", "event": "WSCG", "issn": "1213-6972", "journal": "Journal of WSCG", "lecturer": [ 618 ], "location": "Plzen, CZ", "note": "ISBN 978-80-86943-00-8", "number": "1-3", "pages_from": "123", "pages_to": "128", "volume": "15", "research_areas": [ "Rendering" ], "keywords": [ "Real-time Rendering", "Natural Scene Rendering", "Natural Phenomena", "GPU Programming" ], "weblinks": [], "files": [ { "description": "grass screenshot", "filetitle": "grass_screenshot", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 768, "name": "Habel_2007_IAG-grass_screenshot.jpg", "type": "image/jpeg", "size": 454916, "path": "Publication:Habel_2007_IAG", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-grass_screenshot.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-grass_screenshot:thumb{{size}}.png" }, { "description": "HLSL implementation of the grass shader", "filetitle": "grass_shader", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Habel_2007_IAG-grass_shader.HLSL", "type": "text/plain", "size": 7169, "path": "Publication:Habel_2007_IAG", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-grass_shader.HLSL", "thumb_image_sizes": [] }, { "description": "Textures used in the paper", "filetitle": "grass_textures", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Habel_2007_IAG-grass_textures.zip", "type": "application/x-zip", "size": 11590868, "path": "Publication:Habel_2007_IAG", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-grass_textures.zip", "thumb_image_sizes": [] }, { "description": "Video of instant animated grass", "filetitle": "instant_animated_grass", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Habel_2007_IAG-instant_animated_grass.wmv", "type": "text/plain", "size": 27782156, "path": "Publication:Habel_2007_IAG", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-instant_animated_grass.wmv", "thumb_image_sizes": [] }, { "description": null, "filetitle": "Preprint", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Habel_2007_IAG-Preprint.pdf", "type": "application/pdf", "size": 7083923, "path": "Publication:Habel_2007_IAG", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-Preprint.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/Habel_2007_IAG-Preprint:thumb{{size}}.png" } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_2007_IAG/", "__class": "Publication" }, { "id": "groeller-2007-vis", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Visualization -- I see it my way", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2007-05-22", "event": "NorVis 2007", "location": "University of Bergen, Norway", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2007-vis/", "__class": "Publication" }, { "id": "beck-2007-melk", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Licht aus der Finsternis", "date": "2007", "abstract": "Vor 550 Jahren, am 3.9.1457, beobachteten Georg von Peuerbach und Johannes Regiomontanus in Melk eine totale Mondfinsternis. 300 Jahre später lud Georg Mathias Bose zu einem Jubiläumssymposium nach Wittenberg, da in seinen Augen durch diese Beobachtung die Astronomie wiedererweckt worden war. Was war an dieser - gar nicht besonders langen - Mondfinsternis so besonders?\r\n\r\nDer Vortrag gibt Einblick in die Schätze der Bibliothek Melk, Verbindungen zwischen Melk und der Wiener Universität, und Methoden und Instrumente der mittelalterlichen Astronomie (mit Demonstrationen an Instrument-Nachbauten).", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 682, 222 ], "date_from": "2007-09-23", "event": "Vortragsabend", "location": "Stift Melk", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/beck-2007-melk/", "__class": "Publication" }, { "id": "zotti-2007-PhD", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Computer Graphics in Historical and Modern Sky Observations", "date": "2007", "abstract": "This work describes work done in three areas of research where sky observations meet\ncomputer graphics. The whole topic covers several millennia of human history\nand posed combined challenges from fields including archaeology, astronomy,\ncultural heritage, digital image processing and computer graphics.\n\nThe first part presents interdisciplinary work done in the fields of\narchaeo-astronomy, visualisation and virtual reconstruction. A novel diagram\nhas been developed which provides an intuitive, easy visualisation to\ninvestigate archaeological survey maps for evidence of astronomically\nmotivated orientation of buildings. This visualisation was developed and first\napplied to a certain class of neolithic circular structures in Lower Austria\nin order to investigate the idea of solar orientation of access doorways.\nThis diagram and its intuitive interpretation allowed the author to set up a new\nhypothesis about practical astronomical activities in the middle neolithic\nperiod in central Europe.\n\nHow virtual reconstructions of these buildings characteristic for a short time\nduring the neolithic epoch can be combined with the excellent sky simulation\nof a modern planetarium to communicate these results to a broader audience is\ndescribed thereafter.\n\nThe second part of this work describes a certain class of historical scientific\ninstruments for sky observations and its reconstruction with methods of\ncomputer graphics.\nLong after the stone age, in the Middle Ages, the astrolabe was the most celebrated\ninstrument for celestial observations and has been explained in contemporary\nliterature, usually with the help of precomputed tables for a certain size or\nkind of instrument. Today, historical exhibitions frequently present one of\nthese instruments, but its various applications are hard to explain to the\ngeneral audience without hands-on demonstration.\nFor this challenge from the cultural heritage domain,\nan approach using the idea of procedural modelling is presented. Here, a\ncomputer graphics model is not statically drawn but specified by parametrised\nplotting functions, which can then be repeatedly executed with different\nparameters to create the final model. This approach is demonstrated to provide\na very flexible solution which can immediately be applied to specific needs\njust by tweaking a few parameters, instead of having to repetitively draw the whole model manually.\nFrom the two-dimensional procedural model, 3D models can be easily created,\nand even the production of wooden instruments on a Laser engraver/plotter is\ndemonstrated.\n\nThe third and longest part deals with methods of sky simulation and rendering\nin the domain of computer graphics. In this discipline, modelling of skylight\nand atmospheric effects has developed tremendously over the last two decades,\nwhich is covered by an extensive survey of literature from the computer\ngraphics and also atmosphere physics domains.\n\nThe requirements of physically correct or at least plausible rendering include\nrealistic values for sky brightness. Measurements performed with a luminance\nmeter on a clear sky in order to verify the currently most widely used\nanalytic skylight model [Preetham 1999] shows however its limited\napplicability.\n\nThere are two classical groups of clear-sky models: numerical simulations of\nscattering in the atmosphere, and fast analytical models. Recently, another\nmethod for more realistic looking skylight models has been developed: digital\nimages taken with a fisheye lens are combined into high dynamic range images\nwhich can be used for scene illumination and as sky background. These\nimages can be calibrated by photometric measurements of absolute luminance\nvalues. Long-time exposures allow to apply this system to quantitative\ninvestigations of sky brightness, sky colours, and also nocturnal light pollution by artificial\nillumination. Results and other applications of the system are described, and\nthe pipeline for creating such images is described in the appendix.\n\nThis work closes with some notes of future directions of research.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222 ], "date_end": "2007-11", "date_start": "2005-01", "supervisor": [ 190, 192 ], "research_areas": [ "Rendering" ], "keywords": [ "Astrolabe", "Archaeo-Astronomy", "Skydome Visualisation", "Cultural Heritage", "Sky Measurements" ], "weblinks": [], "files": [ { "description": null, "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "zotti-2007-PhD-pdf.pdf", "type": "application/pdf", "size": 54148272, "path": "Publication:zotti-2007-PhD", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-PhD/zotti-2007-PhD-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-PhD/zotti-2007-PhD-pdf:thumb{{size}}.png" } ], "projects_workgroups": [ "Skydome" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/zotti-2007-PhD/", "__class": "Publication" }, { "id": "Buerger-2007-cmv", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive cross-detector analysis of vortical flow data", "date": "2007", "abstract": "In this paper we discuss the application of multiple\r\nlinked views for advanced vortex investigation in flow data. Local\r\nfeature detectors and additional measures integrate into an\r\ninteractive flow feature detection system based on multiple linked\r\nviews. We discuss how linking and brushing of derived feature\r\ninformation can lead to increased performance in interactive feature\r\nanalysis. In a case study we demonstrate how the possibility to\r\nintegrate the information of multiple detectors leads to sound\r\nunderstanding of vortex type features. Enhanced credibility and\r\ncombined advantages of several detectors can be achieved by uniting\r\nthe results of multiple feature detectors in multiple coordinated\r\nviews.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Multiple views and smooth brushing for vortex analysis", "filetitle": "Figure1", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1978, "image_height": 1028, "name": "Buerger-2007-cmv-Figure1.png", "type": "image/png", "size": 441549, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure1.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure1:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 661, 662, 212, 176 ], "booktitle": "Proceedings of CMV 2007", "lecturer": [ 661 ], "pages_from": "98", "pages_to": "110", "publisher": "IEEE", "research_areas": [], "keywords": [ "Multiple Views", "Vortex", "Flow Visualization", "Multiple Detectors" ], "weblinks": [], "files": [ { "description": "Multiple views and smooth brushing for vortex analysis", "filetitle": "Figure1", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1978, "image_height": 1028, "name": "Buerger-2007-cmv-Figure1.png", "type": "image/png", "size": 441549, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure1.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure1:thumb{{size}}.png" }, { "description": "Combining multiple detectors using linked views", "filetitle": "Figure2", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2000, "image_height": 855, "name": "Buerger-2007-cmv-Figure2.png", "type": "image/png", "size": 123363, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure2.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure2:thumb{{size}}.png" }, { "description": "PQ-Plot", "filetitle": "Figure3", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2000, "image_height": 739, "name": "Buerger-2007-cmv-Figure3.png", "type": "image/png", "size": 567462, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure3.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure3:thumb{{size}}.png" }, { "description": "Correlating several detectors", "filetitle": "Figure4", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1981, "image_height": 900, "name": "Buerger-2007-cmv-Figure4.png", "type": "image/png", "size": 763819, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure4.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure4:thumb{{size}}.png" }, { "description": "Feature localization analysis", "filetitle": "Figure5", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1995, "image_height": 887, "name": "Buerger-2007-cmv-Figure5.png", "type": "image/png", "size": 851641, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure5.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure5:thumb{{size}}.png" }, { "description": "Analysis of the tumbling motion inside the combustion chamber", "filetitle": "Figure6", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2000, "image_height": 666, "name": "Buerger-2007-cmv-Figure6.png", "type": "image/png", "size": 458780, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure6.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure6:thumb{{size}}.png" }, { "description": "Further investigation of optimal mixing", "filetitle": "Figure7", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2000, "image_height": 662, "name": "Buerger-2007-cmv-Figure7.png", "type": "image/png", "size": 383182, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure7.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure7:thumb{{size}}.png" }, { "description": "Analysis of gasket vortices", "filetitle": "Figure8", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2661, "image_height": 942, "name": "Buerger-2007-cmv-Figure8.png", "type": "image/png", "size": 1044524, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure8.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure8:thumb{{size}}.png" }, { "description": "Interactive comparision of two vortices", "filetitle": "Figure9", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 2604, "image_height": 935, "name": "Buerger-2007-cmv-Figure9.png", "type": "image/png", "size": 459481, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure9.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Figure9:thumb{{size}}.png" }, { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Buerger-2007-cmv-Paper.pdf", "type": "application/pdf", "size": 1446532, "path": "Publication:Buerger-2007-cmv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/Buerger-2007-cmv-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "PVG" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-cmv/", "__class": "Publication" }, { "id": "Buerger-2007-eurovis", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Integrating Local Feature Detectors in the Interactive Visual Analysis of Flow Simulation Data", "date": "2007", "abstract": "We present smooth formulations of common vortex detectors that allow\r\na seamless integration into the concept of interactive visual\r\nanalysis of flow simulation data. We express the originally binary\r\nfeature detectors as fuzzy-sets that can be combined using the\r\nlinking and brushing concepts of interactive visual analysis. Both\r\ninteraction and visualization gain from having multiple detectors\r\nconcurrently available and from the ability to combine them. An\r\napplication study on automotive data reveals how these vortex\r\ndetectors combine and perform in praxis.", "authors_et_al": false, "substitute": null, "main_image": { "description": "A glyph based visualization of flow through a cooling jacket. The design of the casket causes a strong vortex that increases mixing of hot and cold fluid.", "filetitle": "Vortex", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 800, "image_height": 535, "name": "Buerger-2007-eurovis-Vortex.jpg", "type": "image/jpeg", "size": 83021, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Vortex.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Vortex:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 661, 662, 1303, 212, 176 ], "booktitle": "Proceedings of Eurographics/ IEEE-VGTC Symposium on Visualization 2007", "editor": "K. Museth, T. Möller, A. Ynnerman", "isbn": "9783905673456", "lecturer": [ 661 ], "pages_from": "171", "pages_to": "178", "research_areas": [], "keywords": [ "Interactive visual analysis", "Fuzzy classifier", "Vortex detector", "Cooling jacket" ], "weblinks": [], "files": [ { "description": "Combination of smooth featrue detectors and interactive visual analysis", "filetitle": "Figure1", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 6575, "image_height": 2346, "name": "Buerger-2007-eurovis-Figure1.png", "type": "image/png", "size": 1225837, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure1.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure1:thumb{{size}}.png" }, { "description": "Major components of flow through the cooling jacket", "filetitle": "Figure2", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 680, "image_height": 452, "name": "Buerger-2007-eurovis-Figure2.jpg", "type": "image/jpeg", "size": 44965, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure2.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure2:thumb{{size}}.png" }, { "description": "A feature based focus+context visualizaion showing regions of near stagnant, hot flow with medium to high levels of the lambda2 vortex detector", "filetitle": "Figure3", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 3756, "image_height": 1275, "name": "Buerger-2007-eurovis-Figure3.png", "type": "image/png", "size": 1512644, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure3.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure3:thumb{{size}}.png" }, { "description": "Turbulent region behind cooling jacket gasket", "filetitle": "Figure4", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 3693, "image_height": 1250, "name": "Buerger-2007-eurovis-Figure4.png", "type": "image/png", "size": 1989001, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure4.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Figure4:thumb{{size}}.png" }, { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Buerger-2007-eurovis-Paper.pdf", "type": "application/pdf", "size": 799517, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Paper:thumb{{size}}.png" }, { "description": "Presentation given at EuroVis07 Conference", "filetitle": "Presentation", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Buerger-2007-eurovis-Presentation.pdf", "type": "application/pdf", "size": 3151315, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Presentation.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Presentation:thumb{{size}}.png" }, { "description": "This video shows basic ideas and results and demonstrates the interactiveness of the approach.", "filetitle": "Video", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Buerger-2007-eurovis-Video.avi", "type": "", "size": 9312914, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Video.avi", "thumb_image_sizes": [] }, { "description": "A glyph based visualization of flow through a cooling jacket. The design of the casket causes a strong vortex that increases mixing of hot and cold fluid.", "filetitle": "Vortex", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 800, "image_height": 535, "name": "Buerger-2007-eurovis-Vortex.jpg", "type": "image/jpeg", "size": 83021, "path": "Publication:Buerger-2007-eurovis", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Vortex.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/Buerger-2007-eurovis-Vortex:thumb{{size}}.png" } ], "projects_workgroups": [ "PVG" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Buerger-2007-eurovis/", "__class": "Publication" }, { "id": "buerger-2007-star", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Visualization of Multi-variate Scientific Data", "date": "2007", "abstract": "In this state-of-the-art report we discuss relevant research works related to the visualization of complex, multi-variate data. We focus on ''non-classical'' approaches, i.e. approaches which haven't been discussed in previous related reports, and we highlight techniques which potentially lead towards new directions in visualization research. We discuss how different techniques take effect at specific stages of the visualization pipeline and how they apply to multi-variate data sets being composed of scalars, vectors, and tensors. We\r\n also provide a categorization of these techniques in the aim for a better\r\n overview of related approaches. In the second part of this paper we take a\r\n look at recent techniques that are useful for the visualization of complex data\r\n sets either because they are general purpose or because they can be adapted to specific\r\n problems.", "authors_et_al": false, "substitute": null, "main_image": { "description": "Visualization research is developing from classical 3D structured scalar visualization. the use of techniques that allow the visualization of time-dependent, complex and multi-variate data in a useful way will be a key to successful visualization applications in the future.", "filetitle": "Figure1", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 308, "image_height": 196, "name": "buerger-2007-star-Figure1.jpg", "type": "image/jpeg", "size": 11681, "path": "Publication:buerger-2007-star", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure1.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure1:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 661, 176 ], "booktitle": "EuroGraphics 2007 State of the Art Reports (STARs)", "isbn": "1017-4656", "lecturer": [ 672 ], "pages_from": "117", "pages_to": "134", "research_areas": [], "keywords": [ "scientific data", "multi-variate data" ], "weblinks": [], "files": [ { "description": "Visualization research is developing from classical 3D structured scalar visualization. the use of techniques that allow the visualization of time-dependent, complex and multi-variate data in a useful way will be a key to successful visualization applications in the future.", "filetitle": "Figure1", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 308, "image_height": 196, "name": "buerger-2007-star-Figure1.jpg", "type": "image/jpeg", "size": 11681, "path": "Publication:buerger-2007-star", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure1.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure1:thumb{{size}}.png" }, { "description": "Six examples of how to deal with multi-dimensional data-sets: (a) traditional (b) deriving additional quantities (c) linking brushing and other SimVis related techniques (d) data intermixing (e) layering rendered images (f) a well-combined visualization technique using all relevant data and derivations.", "filetitle": "Figure2", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1276, "image_height": 993, "name": "buerger-2007-star-Figure2.png", "type": "image/png", "size": 101436, "path": "Publication:buerger-2007-star", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure2.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure2:thumb{{size}}.png" }, { "description": "An example of combined attribute and volumetric views. The 3D view shows the location of data points in space with pressure mapped to color. A 2D slice shows the velocity close to the eye of the storm. Two attribute views (scatterplot of velocity vs. cloud density and histogramm of temperature) are used to select which cells are shown.", "filetitle": "Figure3", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 1110, "image_height": 1108, "name": "buerger-2007-star-Figure3.png", "type": "image/png", "size": 214688, "path": "Publication:buerger-2007-star", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure3.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Figure3:thumb{{size}}.png" }, { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "buerger-2007-star-Paper.pdf", "type": "application/pdf", "size": 1362494, "path": "Publication:buerger-2007-star", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Paper:thumb{{size}}.png" }, { "description": "The slides as presented at EuroGraphics 2007 (not including videos)", "filetitle": "Slides (Updated)", "main_file": true, "use_in_gallery": false, "access": "public", "name": "buerger-2007-star-Slides (Updated).ppt", "type": "application/msword", "size": 24508416, "path": "Publication:buerger-2007-star", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/buerger-2007-star-Slides (Updated).ppt", "thumb_image_sizes": [] } ], "projects_workgroups": [ "PVG" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/buerger-2007-star/", "__class": "Publication" }, { "id": "WIMMER-2007-GAR", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Gametools: Advanced Rendering Effects for Next-Gen Engines", "date": "2007", "abstract": "The GameTools Project is an EU project from the 6th Framework Programme that brings together leading European computer graphics experts from universities in Austria, France, Hungary and Spain with European industrial partners from the fields of computer game development and virtual reality to create next generation real-time 3D libraries for Geometry, Visibility and Global Illumination for the PC platform, with an extension to consoles PS2, XBox, PS3, XBox 360 planned.\n\nWith the project now completed after 3 years, this talk will introduce you to the advanced technology available partly as Open Source, partly under licensing. The project comprises technologies such as continuous multiresolution models for animated characters, massive tree rendering, robust PVS generation for visiblity determination of arbitrarily large game levels, and real-time global illumination effects such as soft shadows, real-time radiosity, caustics, cloud rendering, and many more.\n\nThe effects created in the GameTools project are available as plugins that can be incorporated into any game engine, and are demonstrated with the Open Source Ogre engine.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193 ], "date_from": "2007-08-20", "date_to": "2007-08-22", "event": "Games Convention Developers Conference 2007", "location": "Leipzig, Germany", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/WIMMER-2007-GAR/", "__class": "Publication" }, { "id": "Wenigwieser2007", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Convolution Shadow Maps", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 720 ], "supervisor": [ 452 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Wenigwieser2007/", "__class": "Publication" }, { "id": "daubner-2007-HDR", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "HDR Capturing Tool for Canon EOS Digital SLRs", "date": "2007", "abstract": "This camera remote control program for MS Windows can be used to take time-triggered series of photographs with different exposure times to be later combined into HDR (high dynamic range) images. Works with Canon EOS 1D (several models), 20D, 5D, 350D. ", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 671 ], "supervisor": [ 222 ], "research_areas": [], "keywords": [ "Canon EOS Digital SLR", "Remote Control", "Software", "High Dynamic Range" ], "weblinks": [], "files": [ { "description": "Software and Documentation", "filetitle": "canonHDRcapture", "main_file": false, "use_in_gallery": false, "access": "public", "name": "daubner-2007-HDR-canonHDRcapture.zip", "type": "application/x-zip", "size": 2557394, "path": "Publication:daubner-2007-HDR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/daubner-2007-HDR/daubner-2007-HDR-canonHDRcapture.zip", "thumb_image_sizes": [] }, { "description": "", "filetitle": "User Manual", "main_file": true, "use_in_gallery": false, "access": "public", "name": "daubner-2007-HDR-User Manual.pdf", "type": "application/pdf", "size": 96376, "path": "Publication:daubner-2007-HDR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/daubner-2007-HDR/daubner-2007-HDR-User Manual.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/daubner-2007-HDR/daubner-2007-HDR-User Manual:thumb{{size}}.png" } ], "projects_workgroups": [ "Skydome" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/daubner-2007-HDR/", "__class": "Publication" }, { "id": "giegl-2007-pcg", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Practical Computer Graphics Research, Game Development and the European GameTools Project", "date": "2007", "abstract": "Computer graphics today plays an important role in 3D computer and video\ngame creation, since all the images which are presented to the player are\nbased on principles and algorithms devised from computer graphics research.\n\nOne important aspect with regards to the believability and consecutively immersion\nof players within game worlds are shadows. Creating high-quality dynamic\nshadows in real-time is still a very open field of research. One real-time\nshadowing approach that is very appealing due to its apparent elegant simplicity\nis shadow mapping. The term \"apparent\" is used deliberately here, since\nthe elegance of shadow mapping comes at a price, namely the discretization\nof the first-hit visibility problem to a grid storing occluder depth information with\nregards to the light source. In practice this often leads to shadowing artifacts,\ndue to too little information being available to answer the visibility query with\nenough accuracy. In this thesis, a new family of shadow mapping algorithms\nis presented, which address the problem of the shadow map not containing\nenough information, This is done without requiring a shadow map grid too\nlarge to be stored in memory and which cannot be filled with depth information\nin real time. Based on a basic brute-force approach, two smart algorithms\nare presented, which work in a manner adaptive to the resolution requirements\nof the scene, speeding up the process by at least an order of magnitude.\n\nAnother problem with relevance to the practical application of computer graphics\nto games is how to render a large number of objects fast enough to give the\nplayer a high level of responsiveness (and thereby, again, immersion). Noticing\nthat due to perspective shortening objects farther away from the player do not\nneed as much detail as objects which are nearer, computer graphics has come\nup with the concept of level of detail (LOD), where farther away objects use\nsimpler representations; if done correctly, this leads to a large increase in rendering\nspeed. While LOD has been studied extensively in computer graphics,\none problem of the LOD technique dominating practical application, discrete\nLOD, has been largely ignored: In discrete LOD the simpler representations\nof an object are, as the name implies, discrete, i.e. they exist independently\nof each other. Switching between representations of different complexity by\nsimply switching the representation in use leads to a disruptive discontinuity in\nplayer perception. This thesis presents a practical algorithm, that addresses\nthis problem.\n\nLinked to this research in the computer graphics fields of shadows and level\nof detail, is the case study of the GameTools Project, a Europe-wide project,\nfunded by the European Union, which had as its agenda to bring the results\nof current computer graphics research done within the project to European\ngame developing companies and companies from neighboring fields. The author\nholds the position of Community Manager within the GameTools Project,\nand presents an overview over the project and a more detailed view of his work\nas Community Manager.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 402 ], "date_end": "2007-06", "date_start": "2004-09", "reviewer_1": [ 190 ], "reviewer_2": [ 206 ], "rigorosum": "2007-06-12", "supervisor": [ 193 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "Late draft - final version only available in print from the TU Wien library", "filetitle": "draft", "main_file": true, "use_in_gallery": false, "access": "public", "name": "giegl-2007-pcg-draft.pdf", "type": "application/save", "size": 37402433, "path": "Publication:giegl-2007-pcg", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/giegl-2007-pcg/giegl-2007-pcg-draft.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/giegl-2007-pcg/", "__class": "Publication" }, { "id": "groeller-2006-ivt", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Illustrative Visualization Techniques", "date": "2007", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2006-11-22", "event": "Kolloquiumam Inst. f. Informatik", "location": "Universität Rostock, Deutschland", "research_areas": [ "IllVis" ], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2006-ivt/", "__class": "Publication" }, { "id": "groeller-2007-csu", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Computational Science -- Überblick und eigene Forschungsleistungen", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2007-10-10", "event": "eingeladener Gastvortrag an der Fakultät für Informatik", "location": "Technische Universität Wien", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2007-csu/", "__class": "Publication" }, { "id": "tut-vis-2007", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "IEEE Visualization Tutorial on Illustrative Display and Interaction in Visualization", "date": "2007", "abstract": "The area of illustrative visualization is concerned with developing methods to enhance the\ndepiction of scientific data based on principles founded in traditional illustration. The\nillustration community has century-long experience in adapting their techniques to human\nperceptual needs in order to generate an effective depiction which conveys the desired\nmessage. Thus, their methods can provide us with important insights into visualization\nproblems.\nIn this tutorial, the concepts in illustrative visualization are reviewed. An important aspect here\nis interaction: while traditional illustrations are commonly only presented as static images,\ncomputer-assisted visualization enables interactive exploration and manipulation of complex\nscientific data. Only by coupling illustrative visualization with effective interaction techniques\nits full potential can be exploited.\nThe tutorial starts with a general introduction into the area of illustrative visualization. The\nconcept of importance-driven visualization and its applications are presented. Then we proceed with a discussion how traditional abstraction techniques can be applied in an\ninteractive context using importance-based methods. This ranges from low-level appearance\nto smart viewpoint-dependent visibility techniques such as cutaways or exploded views.\nFurther advanced manipulation strategies are discussed in the third part. The use\ndeformations to enhance visibility of certain features while providing context or to abstract the\nstructure of a complex objects through direct interaction with the data is examined. As many\nof the presented methods rely on a separation of focus and context, i.e., the important\nstructures in the data have been identified, the tutorial discusses approaches for selecting\nobjects of interest in a three-dimensional environment using intuitive sketch-based interfaces.\nSince the effectiveness of a user-interface is heavily dependent on the previous knowledge of\nthe user, the last part of the tutorial examines the concept of layering interfaces based on\nuser expertise. Finally, the application of illustrative display and interaction techniques for\nnon-traditional modalities such as mobile devices concludes the tutorial.\n\nIEEE Visualization 2007 Tutorial Page: http://vis.computer.org/vis2007/session/tutorials.html#t7\n\nSee also previous tutorials on Illustrative Visualization:\n\nIEEE Visualization 2006 Tutorial on Illustrative Visualization for Science and Medicine\nhttp://www.cg.tuwien.ac.at/research/publications/2006/tut-vis-2006/\n\nEurographics 2006 Tutorial on Illustrative Visualization for Science and Medicine http://www.cg.tuwien.ac.at/research/publications/2006/tut-eg-2006/\n\nSIGGRAPH 2006 Course on Illustrative Visualization for Science and Medicine http://www.cg.tuwien.ac.at/research/publications/2006/tut-siggraph-2006/\n\nIEEE Visualization 2005 Tutorial on Illustrative Visualization http://www.cg.tuwien.ac.at/research/publications/2005/Viola-vistutillustrativevis/\n\nEurographics 2005 Tutorial on Illustrative Visualization http://www.cg.tuwien.ac.at/research/publications/2005/eg-tut2005-iv/ \n", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 612, "image_height": 952, "name": "tut-vis-2007-.jpg", "type": "image/jpeg", "size": 124087, "path": "Publication:tut-vis-2007", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/tut-vis-2007/tut-vis-2007-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/tut-vis-2007/tut-vis-2007-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171, 161, 565, 564, 694 ], "research_areas": [ "IllVis" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 612, "image_height": 952, "name": "tut-vis-2007-.jpg", "type": "image/jpeg", "size": 124087, "path": "Publication:tut-vis-2007", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/tut-vis-2007/tut-vis-2007-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/tut-vis-2007/tut-vis-2007-:thumb{{size}}.png" } ], "projects_workgroups": [ "exvisation" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/tut-vis-2007/", "__class": "Publication" }, { "id": "groeller-2007-fci", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Focus+Context in Illustrative Visualization", "date": "2007", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2007-06-13", "event": "Keynote talk at TPCG 07", "location": "University of Wales, Bangor, UK", "research_areas": [ "IllVis" ], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2007-fci/", "__class": "Publication" }, { "id": "groeller-2007-mva", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Medical Visualization: Articular Cartilage Visualization and other Examples", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2007-02-23", "event": "Bergen Bildebehandlings Gruppe (BBG) Seminar", "location": "Dep. of Mathematics, University of Bergen, Norway", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2007-mva/", "__class": "Publication" }, { "id": "neumann-2006-gamma", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Accurate Display Gamma Functions based on Human Observation", "date": "2007", "abstract": "This paper describes an accurate method to obtain the\nTone Reproduction Curve (TRC) of display devices without using\na measurement device. It is an improvement of an existing technique\nbased on human observation, solving its problem of numerical instability\nand resulting in functions in log--log scale which correspond better\nto the nature of display devices.\nWe demonstrate the effiency of our technique on different monitor\ntechnologies, comparing it with direct measurements using a\nspectrophotometer.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 300, "image_height": 280, "name": "neumann-2006-gamma-image.png", "type": "image/png", "size": 6781, "path": "Publication:neumann-2006-gamma", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/neumann-2006-gamma-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/neumann-2006-gamma-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 232, 191, 177, 222, 190 ], "issn": "0361-2317", "journal": "Color Research & Applications", "note": "2006 angenommen, 2007 erschienen", "number": "4", "pages_from": "310", "pages_to": "319", "volume": "32", "research_areas": [ "Rendering" ], "keywords": [ "Generalized Gamma Function", "Colour Reproduction", "Display Measurement", "Human Visual System", "Spatial Vision" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 300, "image_height": 280, "name": "neumann-2006-gamma-image.png", "type": "image/png", "size": 6781, "path": "Publication:neumann-2006-gamma", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/neumann-2006-gamma-image.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/neumann-2006-gamma-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "neumann-2006-gamma-paper.pdf", "type": "application/pdf", "size": 457864, "path": "Publication:neumann-2006-gamma", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/neumann-2006-gamma-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/neumann-2006-gamma-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "realreflect" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/neumann-2006-gamma/", "__class": "Publication" }, { "id": "groeller-2007-visII", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Visualization -- I see it my way II", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2007-07-26", "event": "Seminar: Scientific Visualization", "location": "Dagstuhl, Deutschland", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2007-visII/", "__class": "Publication" }, { "id": "groeller-2007-vws", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Visualization with Style", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2007-11-02", "event": "Distinguished Lecture Series", "location": "Scientific Computing and Imaging Institute, University of Utah", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/groeller-2007-vws/", "__class": "Publication" }, { "id": "Habel_07_xms", "type_id": "xmascard", "tu_id": null, "repositum_id": null, "title": "X-mas 2007", "date": "2007", "abstract": "Die gezeigte Szene ist mit einer Poisson-gefilterten Shadow Map \ndynamisch beleuchtet und wird mittels DirectX 10 dargestellt. \nDie Tanne besteht aus insgesamt 60.032 teilweise transparenten Dreiecken.\n\nAlle Oberflächen sind mit Normal Maps versehen, \ndie bei der Tanne und dem schneebedeckten Gelände \nmit multi-bounce Ambient Occlusion kombiniert werden. \nEin modifizierter Reinhard Tone Mapper mit Glare-Filter \nsorgt für eine realistische Darstellung bei 60 Bildern pro Sekunde.\n\n\n\nThe shown scene is dynamically lit with a Poisson-filtered shadow map \nand displayed using DirectX 10. The fir tree consists of 60,032 partly transparent triangles. \nAll surfaces are normal mapped, which is combined with multi-bounce ambient occlusion \nfor the fir tree and the snow-covered terrain. \nA modified Reinhard tone mapper with a glare filter realistically displays the scene at 60 frames per second.", "authors_et_al": false, "substitute": null, "main_image": { "description": "xmas card front", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 722, "name": "Habel_07_xms-image.jpg", "type": "image/jpeg", "size": 306325, "path": "Publication:Habel_07_xms", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/Habel_07_xms-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/Habel_07_xms-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 618 ], "research_areas": [ "Rendering" ], "keywords": [ "x-mas" ], "weblinks": [], "files": [ { "description": null, "filetitle": "Christmas card", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Habel_07_xms-Christmas card.pdf", "type": "application/pdf", "size": 27810588, "path": "Publication:Habel_07_xms", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/Habel_07_xms-Christmas card.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/Habel_07_xms-Christmas card:thumb{{size}}.png" }, { "description": "xmas card front", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 722, "name": "Habel_07_xms-image.jpg", "type": "image/jpeg", "size": 306325, "path": "Publication:Habel_07_xms", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/Habel_07_xms-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/Habel_07_xms-image:thumb{{size}}.png" } ], "projects_workgroups": [ "Treelumination", "xmas" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Habel_07_xms/", "__class": "Publication" }, { "id": "Knecht_Schwaerzler_2008_ash", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Soft Shadows Using Adaptive Subdivision", "date": "2007", "abstract": "We render soft shadows using shadow mapping and adaptive subdivision of the light source based on the visibility difference between adjacent light source samples.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "startscreen", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 773, "image_height": 599, "name": "Knecht_Schwaerzler_2008_ash-startscreen.jpg", "type": "image/jpeg", "size": 101993, "path": "Publication:Knecht_Schwaerzler_2008_ash", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-startscreen.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-startscreen:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 678, 736 ], "matrikelnr": "0325222 / 0326294", "note": "1", "supervisor": [ 326 ], "research_areas": [], "keywords": [ "Shadow Mapping", "Real Time Rendering", "Soft Shadows" ], "weblinks": [], "files": [ { "description": "", "filetitle": "manual + executable", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 773, "preview_image_height": 599, "name": "Knecht_Schwaerzler_2008_ash-manual + executable.zip", "type": "application/x-zip", "size": 8826786, "path": "Publication:Knecht_Schwaerzler_2008_ash", "preview_name": "Knecht_Schwaerzler_2008_ash-manual + executable:preview.png", "preview_type": "image/jpeg", "preview_size": 101993, "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-manual + executable.zip", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-manual + executable:thumb{{size}}.png" }, { "description": "", "filetitle": "source code", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Knecht_Schwaerzler_2008_ash-source code.zip", "type": "application/x-zip", "size": 9973500, "path": "Publication:Knecht_Schwaerzler_2008_ash", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-source code.zip", "thumb_image_sizes": [] }, { "description": "", "filetitle": "startscreen", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 773, "image_height": 599, "name": "Knecht_Schwaerzler_2008_ash-startscreen.jpg", "type": "image/jpeg", "size": 101993, "path": "Publication:Knecht_Schwaerzler_2008_ash", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-startscreen.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/Knecht_Schwaerzler_2008_ash-startscreen:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Knecht_Schwaerzler_2008_ash/", "__class": "Publication" }, { "id": "LIPP-2007-CGA", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Interactive Computer Generated Architecture", "date": "2007", "abstract": "The creation of visually convincing architectural models using traditional modeling methods is a labor intensive task. Procedural modeling techniques strive to reduce the manual work an artist has to perform when modeling architecture. In previous work, those techniques were successfully applied to the creation of architecture. However, previous methods have a limited usability, as they are based on text editing. This makes modeling unintuitive and diminishes the advantages of procedural modeling.\n\nTherefore, methods to interactively create procedural architecture, using a graphical user interface, are explored in this thesis. As interactivity also requires real-time rendering performance, methods to accelerate the generation of architecture are investigated. Further, the thesis provides a detailed report on previous procedural architecture generation techniques.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 576, "image_height": 338, "name": "LIPP-2007-CGA-.jpg", "type": "image/jpeg", "size": 89121, "path": "Publication:LIPP-2007-CGA", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/LIPP-2007-CGA-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/LIPP-2007-CGA-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 680 ], "date_end": "2007", "date_start": "2007", "matrikelnr": "0125260", "supervisor": [ 193 ], "research_areas": [ "Modeling" ], "keywords": [ "computer generated architecture", "procedural modeling" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 576, "image_height": 338, "name": "LIPP-2007-CGA-.jpg", "type": "image/jpeg", "size": 89121, "path": "Publication:LIPP-2007-CGA", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/LIPP-2007-CGA-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/LIPP-2007-CGA-:thumb{{size}}.png" }, { "description": null, "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "LIPP-2007-CGA-Thesis.pdf", "type": "application/pdf", "size": 10045616, "path": "Publication:LIPP-2007-CGA", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/LIPP-2007-CGA-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/LIPP-2007-CGA-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "GAMEWORLD" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LIPP-2007-CGA/", "__class": "Publication" }, { "id": "Selig-2007-VegAnim", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Vorberechnete interaktive physikalisch-basierte Animation von Vegetation am Beispiel Gras", "date": "2007", "abstract": "In dieser Arbeit wird ein Ansatz zur Simulation der Bewegung von Vegetation (Gräser, Sträucher und Bäumen) vorgestellt. Die Hauptneuerung in diesem Verfahren ist die Trennung der Berechnung der Bewegungen (Präprozess) von der tatsächlichen Durchführung der Animation (Laufzeitsystem). Durch diese Teilung muss der Präprozess nicht in Echtzeit ablaufen, wodurch aufwendigere physikalisch-basierte Berechnungen möglich werden. Der Laufzeitprozess benutzt die vorberechneten Daten, um die Bewegung der Vegetation durchzuführen. Die Visualisierung wird durch Anwendung der Daten auf Billboards umgesetzt.\n\nBeim Präprozess wird besonderes Gewicht auf den modularen Aufbau gelegt, wodurch eine leichte Anpassung an verschiedene Szenarien möglich wird. Der Präprozess gliedert sich in drei Hauptkomponenten. Der erste Bereich ist das parametrisierte 3D-D0L-System zur Erstellung der Vegetation, welche zu Simulationszwecken in Partikelsysteme überführt werden. Der zweite Bereich betrifft die normalverteilte 4D-Perlinnoisestruktur zur Simulation verschieden wirkender Kräfte. Zusammengeführt werden diese beiden Bereiche in einem dynamischen Feder-Dämpfer-Masse-System zur Berechnung der Bewegungsdaten. Die Speicherung erfolgt in einer visuell kontrollierbaren 3D-Textur.\n\nMit dieser Anordnung ist es möglich, realistische Vegetationsbewegungen zu erstellen, aktuelle Probleme des ‚State of the Art’ zu lösen und diese in einer schnell zugreifbaren Datenstruktur für verschiedene Anwendungen zu erhalten.\n", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 620 ], "supervisor": [ 356 ], "research_areas": [], "keywords": [ "Vegetation Animation", "L-Systems" ], "weblinks": [], "files": [ { "description": "Masters thesis", "filetitle": "thesis", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Selig-2007-VegAnim-thesis.pdf", "type": "application/pdf", "size": 3281338, "path": "Publication:Selig-2007-VegAnim", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Selig-2007-VegAnim/Selig-2007-VegAnim-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Selig-2007-VegAnim/Selig-2007-VegAnim-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Selig-2007-VegAnim/", "__class": "Publication" }, { "id": "Luksch_2007_RHR", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Realtime HDR Rendering", "date": "2007", "abstract": "High dynamic range rendering in realtime graphics has increased the visual quality of realtime scenes essentially.\r\nThere are several techniques of HDR-Rendering. This work summarizes the theoretical background and results\r\nof previous works. A ready-to-use HDR rendering library has been developed that integrates seamlessly into the\r\nopen source graphics engine Ogre3D. Further a comparison that show the advantages and disadvantages\r\nof different techniques in a realtime rendered scene has been made.", "authors_et_al": false, "substitute": null, "main_image": { "description": "HDR_Screenshot", "filetitle": "HDR_Screenshot", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 768, "name": "Luksch_2007_RHR-HDR_Screenshot.PNG", "type": "image/png", "size": 497211, "path": "Publication:Luksch_2007_RHR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/Luksch_2007_RHR-HDR_Screenshot.PNG", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/Luksch_2007_RHR-HDR_Screenshot:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 659 ], "supervisor": [ 618 ], "research_areas": [], "keywords": [ "HDR", "Realtime Rendering" ], "weblinks": [], "files": [ { "description": "HDR_Screenshot", "filetitle": "HDR_Screenshot", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1024, "image_height": 768, "name": "Luksch_2007_RHR-HDR_Screenshot.PNG", "type": "image/png", "size": 497211, "path": "Publication:Luksch_2007_RHR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/Luksch_2007_RHR-HDR_Screenshot.PNG", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/Luksch_2007_RHR-HDR_Screenshot:thumb{{size}}.png" }, { "description": "Realtime HDR Rendering( Ogre Wiki", "filetitle": "RealtimeHDR ", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Luksch_2007_RHR-RealtimeHDR .pdf", "type": "application/pdf", "size": 5200434, "path": "Publication:Luksch_2007_RHR", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/Luksch_2007_RHR-RealtimeHDR .pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/Luksch_2007_RHR-RealtimeHDR :thumb{{size}}.png" } ], "projects_workgroups": [ "Treelumination" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Luksch_2007_RHR/", "__class": "Publication" }, { "id": "mantler-2007-rtv", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Interactive Vegetation Rendering", "date": "2007", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 407 ], "date_end": "2007-03", "date_start": "2003-06", "supervisor": [ 176, 190 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "mantler-2007-rtv-pdf.pdf", "type": "application/pdf", "size": 68288941, "path": "Publication:mantler-2007-rtv", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/mantler-2007-rtv/mantler-2007-rtv-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/mantler-2007-rtv/mantler-2007-rtv-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/mantler-2007-rtv/", "__class": "Publication" }, { "id": "matkovic-2007-iva", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Interactive Visual Analysis for Engineering Applications", "date": "2007", "abstract": "Visualization has been used in engineering applications from its early days. Traditionally, scientific visualization techniques were\r\nextensively used in this field. We in VRVis have started to combine various visualization techniques and applying them to\r\nengineering data. From the data point of view, we deal with two different kinds of data. The first one comes from 3D CFD\r\nsimulation, and the second one follows an unusual data model which will be described. This data comes from a series of 1D CFD\r\nsimulations. It is a special case of multidimensional data. The main difference is that certain dimensions can contain mappings\r\n(1D, 2D, ... functions) and not only scalar values as basic items. We will present various innovative interactive visualization\r\ntechniques applied to such a model. The curve view, segmented curve view and color lines view are only a subset of these. [...]", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 235 ], "date_from": "2007-05-21", "date_to": "2007-05-22", "event": "NorVis 2007", "location": "Bergen, Norwegen", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/matkovic-2007-iva/", "__class": "Publication" }, { "id": "riegler_topal_2007", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Soft Shadow Maps with Backprojection", "date": "2007", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 722, 723 ], "supervisor": [ 452 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/riegler_topal_2007/", "__class": "Publication" }, { "id": "mattausch-2007-iav", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "1.\tAdaptive Visibility-Driven View Cell Construction", "date": "2007", "abstract": "We present a new method for the automatic partitioning of view space into a multi-level view cell hierarchy. We use a cost-based model in order to minimize the average rendering time. Unlike previous methods, our model\ntakes into account the actual visibility in the scene, and the partition is not restricted to planes given by the scene geometry. We show that the resulting view cell hierarchy works for different types of scenes and gives lower average rendering time than previously used methods.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 326 ], "date_from": "2007-12", "event": "Konversatorium", "location": "Prague University of Technology", "research_areas": [ "Rendering" ], "keywords": [ "visibiility", "view cells" ], "weblinks": [], "files": [], "projects_workgroups": [ "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/mattausch-2007-iav/", "__class": "Publication" }, { "id": "Rautek-2007-O3D", "type_id": "poster", "tu_id": null, "repositum_id": null, "title": "Caricaturistic Visualization of Deformation Data Based on High Density Point Clouds", "date": "2007", "abstract": "Modern deformation monitoring techniques offer possibilities to measure and analyze deformation processes in detail. There are various different sensor systems on the market that can be used in these application fields, each having specific features in terms of accuracy, robustness, user interaction, operational range, measurement speed and frequency, resolution, or other relevant parameters. The selection of an appropriate sensor system for a particular application is not trivial.\r\n\r\nIn recent years research on image-based measurement systems and laser scanners has gained increasing interest – in many cases a combination of different sensors has advantages over a single-sensor system (e.g. different accuracy and reliability classes, different measurement range, etc.).\r\n\r\nThe point clouds produced by such systems potentially consist of a vast number of points. One of the main problems concerning the analysis and interpretation of deformation measurements is the visualization of the data respectively of the underlying deformation. In this paper we present the application of the recently developed caricaturistic visualization method to deformation data based on high density point clouds. Caricaturistic visualization depicts the deformation data in an exaggerated way. The exaggeration of the deformation accents subtle deviations and supports the viewer for the correct interpretation of the underlying deformation. We show results for facade deformation data as well as for landslide data.\r\n", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 512, "image_height": 416, "name": "Rautek-2007-O3D-.jpg", "type": "image/jpeg", "size": 257841, "path": "Publication:Rautek-2007-O3D", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/Rautek-2007-O3D-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/Rautek-2007-O3D-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 488, 664, 166 ], "booktitle": "8th Conference on Optical 3-D Measurement Techniques, Zurich, Switzerland", "date_from": "2007-07-09", "date_to": "2007-07-12", "research_areas": [], "keywords": [ "Point Cloud", "Deformation Measurement", "Visualization" ], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 512, "image_height": 416, "name": "Rautek-2007-O3D-.jpg", "type": "image/jpeg", "size": 257841, "path": "Publication:Rautek-2007-O3D", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/Rautek-2007-O3D-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/Rautek-2007-O3D-:thumb{{size}}.png" }, { "description": "", "filetitle": "poster", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Rautek-2007-O3D-poster.pdf", "type": "application/pdf", "size": 9353734, "path": "Publication:Rautek-2007-O3D", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/Rautek-2007-O3D-poster.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/Rautek-2007-O3D-poster:thumb{{size}}.png" } ], "projects_workgroups": [ "exvisation" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/Rautek-2007-O3D/", "__class": "Publication" } ]