[ { "id": "Straka-2003-Bon", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Bone Segmentation in CT-Angiography Data Using a Probabilistic Atlas", "date": "2003-11", "abstract": "Automatic segmentation of bony structures in CT angiography datasets is an essential pre-processing step necessary for most visualization and analysis tasks. Since traditional density and gradient operators fail in non-trivial cases (or at last require extensive operator work), we propose a new method for segmentation of CTA data based on a probabilistic atlas. Sorting densities and masks of previously manually segmented tissues to the atlas can constitute a statistical information base for latter accurate segmentation. In order to eliminate dimensional and anatomic variability of the atlas input datasets, these have to be spatially normalized (registered) first by applying a non-rigid transformation. After this transformation, densities and tissue masks are statistically processed (e.g. averaged) within the atlas. Records in the atlas can be later evaluated for estimating the probability of bone tissue in a voxel of an unsegmented dataset.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2003-Bon-.pdf", "type": "application/pdf", "size": 747482, "path": "Publication:Straka-2003-Bon", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Bon/Straka-2003-Bon-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Bon/Straka-2003-Bon-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 168, 236, 170, 164, 166 ], "booktitle": "Vision, Modeling and Visualization", "pages_from": "505", "pages_to": "512", "publisher": "VMV", "research_areas": [], "keywords": [ "Knowledge Based Segmentation", "CT Angiography", "Probabilistic Atlas", "Thin-Plate Spline", "Distance Fields", "Histogram Classficication" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2003-Bon-.pdf", "type": "application/pdf", "size": 747482, "path": "Publication:Straka-2003-Bon", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Bon/Straka-2003-Bon-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Bon/Straka-2003-Bon-:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Bon/", "__class": "Publication" }, { "id": "Straka-2003-CTA", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "3D Watershed Transform Combined with a Probabilistic Atlas for Medical Image Segmentation", "date": "2003-11", "abstract": "Recent advances in medical imaging technology using multiple detector-row computed tomography (CT) provide volumetric datasets with unprecedented spatial resolution. This has allowed for CT to evolve into an excellent non-invasive vascular imaging technology, commonly referred to as CT-angiography. Visualization of vascular structures from CT datasets is demanding, however, and identification of anatomic objects in CT-datasets is highly desirable. Density and/or gradient operators have been used most commonly to classify CT data. In CT angiography, simple density/gradient operators do not allow precise and reliable classification of tissues due to the fact that different tissues (e.g. bones and vessels) possess the same density range and may lie in close spatial vicinity. We hypothesize, that anatomic classification can be achieved more accurately, if both spatial location and density properties of volume data are taken into account. We present a combination of two well-known methods for volume data processing to obtain accurate tissue classification. 3D watershed transform is used to partition the volume data in morphologically consistent blocks and a probabilistic anatomic atlas is used to distinguish between different kinds of tissues based on their density.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 168, 169, 170, 164, 166 ], "number": "TR-186-2-03-13", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "Histogram Classification", "Thin-Plate-Spline", "Probabilistic Atlas", "Knowledge Based Segmentation", "CT Angiography" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2003-CTA-paper.pdf", "type": "application/pdf", "size": 656919, "path": "Publication:Straka-2003-CTA", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-CTA/Straka-2003-CTA-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-CTA/", "__class": "Publication" }, { "id": "La Cruz-2003-AECX", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Accuracy Evaluation of Different Centerline Approximations of Blood Vessels", "date": "2003-11", "abstract": "Accurate determination of the central vessel axis is a prerequisite for automated arteries diseases visualization and quantification. In this paper we present an evaluation of different methods used to approximate the centerline of the vessel in a phantom simulating the peripheral arteries. Six algorithms were used to determine the centerline of a synthetic peripheral arterial vessel. They are based on: ray casting technique using thresholds and maximum gradient-like stop criterion, pixel motion estimation between successive images called block matching, center of gravity and shape based segmentation. The Randomized Hough Transform and ellipse fitting using Lagrange Multiplier have been used as shape based segmentation techniques, fitting an elliptical shape to a set of points. The synthetic data simulate the peripheral arterial tree (aorta-to-pedal). The vessel diameter changes along the z-axis from about 0.7 to about 23 voxels. The data dimension is 256x256x768 with voxel size 0.5x0.5x0.5mm. In this data set the centerline is known and an estimation of the error is calculated in order to determine how precise a given method is and to classify it accordingly.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 168 ], "number": "TR-186-2-03-12", "pages_from": "1", "pages_to": "11", "research_areas": [], "keywords": [ "Medical Visualization", "Vessel Segmentation", "Centerline Detection" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "La Cruz-2003-AECX-paper.pdf", "type": "application/pdf", "size": 1706086, "path": "Publication:La Cruz-2003-AECX", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/La Cruz-2003-AECX/La Cruz-2003-AECX-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/La Cruz-2003-AECX/", "__class": "Publication" }, { "id": "La Cruz-2003-AEC", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Accuracy Evaluation of Different Centerline Approximations of Blood Vessels", "date": "2003-11", "abstract": "Accurate determination of the central vessel axis is a prerequisite for automated arteries diseases visualization and quantification. In this paper we present an evaluation of different methods used to approximate the centerline of the vessel in a phantom simulating the peripheral arteries. Six algorithms were used to determine the centerline of a synthetic peripheral arterial vessel. They are based on: ray casting technique using thresholds and maximum gradient-like stop criterion, pixel motion estimation between successive images called block matching, center of gravity and shape based segmentation. The Randomized Hough Transform and ellipse fitting using Lagrange Multiplier have been used as shape based segmentation techniques, fitting an elliptical shape to a set of points. The synthetic data simulate the peripheral arterial tree (aorta-to-pedal). The vessel diameter changes along the z-axis from about 0.7 to about 23 voxels. The data dimension is 256x256x768 with voxel size 0.5x0.5x0.5mm. In this data set the centerline is known and an estimation of the error is calculated in order to determine how precise a given method is and to classify it accordingly.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 168 ], "number": "TR-186-2-03-12", "pages_from": "1", "pages_to": "TR-186-2-03-13Paper.pdf", "research_areas": [], "keywords": [ "Medical Visualization", "Vessel Segmentation", "Centerline Detection" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "La Cruz-2003-AEC-paper.pdf", "type": "application/pdf", "size": 1706086, "path": "Publication:La Cruz-2003-AEC", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/La Cruz-2003-AEC/La Cruz-2003-AEC-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/La Cruz-2003-AEC/", "__class": "Publication" }, { "id": "Bruckner-2003-The", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The Inverse Warp: Non-Invasive Integration of Shear-Warp Volume Rendering into Polygon Rendering Pipelines", "date": "2003-11", "abstract": "In this paper, a simple and efficient solution for combining shear-warp volume rendering and the hardware graphics pipeline is presented. The approach applies an inverse warp transformation to the Z-Buffer, containing the rendered geometry. This information is used for combining geometry and volume data during compositing. We present applications of this concept which include hybrid volume rendering, i.e., concurrent rendering of polygonal objects and volume data, and volume clipping on convex clipping regions. Furthermore, it can be used to efficiently define regions with different rendering modes and transfer functions for focus+context volume rendering. Empirical results show that the approach has very low impact on performance.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 300, "name": "Bruckner-2003-The-image.jpg", "type": "image/jpeg", "size": 16513, "path": "Publication:Bruckner-2003-The", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 161, 202, 176, 166 ], "booktitle": "Workshop on Vision, Modeling and Visualization", "editor": "T. Ertl, B. Girod, G. Greiner, H. Niemann, H.-P. Seidel, E. Steinbach, R. Westermann", "isbn": "3898380483", "pages_from": "529", "pages_to": "536", "publisher": "infix", "research_areas": [], "keywords": [ "focus+context techniques", "clipping", "hybrid volume rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 300, "name": "Bruckner-2003-The-image.jpg", "type": "image/jpeg", "size": 16513, "path": "Publication:Bruckner-2003-The", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Bruckner-2003-The-Paper.pdf", "type": "application/pdf", "size": 818840, "path": "Publication:Bruckner-2003-The", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Paper:thumb{{size}}.png" }, { "description": null, "filetitle": "Polygonal cone and polygonal sphere (DivX)", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 128, "preview_image_height": 128, "name": "Bruckner-2003-The-Polygonal cone and polygonal sphere (DivX).avi", "type": "video/x-msvideo", "size": 5707776, "path": "Publication:Bruckner-2003-The", "preview_name": "Bruckner-2003-The-Polygonal cone and polygonal sphere (DivX):preview.png", "preview_type": "image/png", "preview_size": 8759, "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Polygonal cone and polygonal sphere (DivX).avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Polygonal cone and polygonal sphere (DivX):thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Polygonal cone and polygonal sphere (DivX):video.mp4" }, { "description": null, "filetitle": "Polygonal cone and volumetric sphere (DivX)", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 128, "preview_image_height": 128, "name": "Bruckner-2003-The-Polygonal cone and volumetric sphere (DivX).avi", "type": "video/x-msvideo", "size": 5657088, "path": "Publication:Bruckner-2003-The", "preview_name": "Bruckner-2003-The-Polygonal cone and volumetric sphere (DivX):preview.png", "preview_type": "image/png", "preview_size": 8913, "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Polygonal cone and volumetric sphere (DivX).avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Polygonal cone and volumetric sphere (DivX):thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Polygonal cone and volumetric sphere (DivX):video.mp4" }, { "description": null, "filetitle": "Volumetric Head and Polygonal Sphere (DivX)", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 128, "preview_image_height": 128, "name": "Bruckner-2003-The-Volumetric Head and Polygonal Sphere (DivX).avi", "type": "video/x-msvideo", "size": 2213888, "path": "Publication:Bruckner-2003-The", "preview_name": "Bruckner-2003-The-Volumetric Head and Polygonal Sphere (DivX):preview.png", "preview_type": "image/png", "preview_size": 18711, "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Volumetric Head and Polygonal Sphere (DivX).avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Volumetric Head and Polygonal Sphere (DivX):thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/Bruckner-2003-The-Volumetric Head and Polygonal Sphere (DivX):video.mp4" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bruckner-2003-The/", "__class": "Publication" }, { "id": "Viola-2003-Har", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Hardware-Based Nonlinear Filtering and Segmentation using High-Level Shading Languages.", "date": "2003-10", "abstract": "Non-linear filtering is an important task for volume analysis. This\r\npaper presents hardware-based implementations of various nonlinear\r\nfilters for volume smoothing with edge preservation. The\r\nCg high-level shading language is used in combination with latest\r\nPC consumer graphics hardware. Filtering is divided into pervertex\r\nand per-fragment stages. In both stages we propose techniques\r\nto increase the filtering performance. The vertex program\r\npre-computes texture coordinates in order to address all contributing\r\ninput samples of the operator mask. Thus additional computations\r\nare avoided in the fragment program. The presented fragment\r\nprograms preserve cache coherence, exploit 4D vector arithmetic,\r\nand internal fixed point arithmetic to increase performance. We\r\nshow the applicability of non-linear filters as part of a GPU-based\r\nsegmentation pipeline. The resulting binary mask is compressed\r\nand decompressed in the graphics memory on-the-fly.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 200, "image_height": 188, "name": "Viola-2003-Har-image.jpg", "type": "image/jpeg", "size": 8841, "path": "Publication:Viola-2003-Har", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/Viola-2003-Har-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/Viola-2003-Har-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171, 162, 166 ], "booktitle": "Proceedings of IEEE Visualization 2003", "editor": "G. Turk, J. van Wijk, K. Moorhead", "isbn": "0780381203", "pages_from": "309", "pages_to": "316", "publisher": "IEEE", "research_areas": [], "keywords": [ "Hardware Acceleration", "Segmentation", "Non-linear Filtering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 200, "image_height": 188, "name": "Viola-2003-Har-image.jpg", "type": "image/jpeg", "size": 8841, "path": "Publication:Viola-2003-Har", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/Viola-2003-Har-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/Viola-2003-Har-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Viola-2003-Har-Paper.pdf", "type": "application/pdf", "size": 325326, "path": "Publication:Viola-2003-Har", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/Viola-2003-Har-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/Viola-2003-Har-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Viola-2003-Har/", "__class": "Publication" }, { "id": "Bittner-2003-Vis", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Visibility in Computer Graphics", "date": "2003-09", "abstract": "Visibility computation is crucial for computer\ngraphics from its very beginning. The first visibility algorithms in\ncomputer graphics aimed to determine visible surfaces in a synthesized\nimage of a 3D scene. Nowadays there are many different visibility\nalgorithms for various visibility problems. We propose a new taxonomy\nof visibility problems that is based on a classification according to\nthe problem domain. We provide a broad overview of visibility problems\nand algorithms in computer graphics grouped by the proposed\ntaxonomy. The paper surveys visible surface algorithms, visibility\nculling algorithms, visibility algorithms for shadow computation,\nglobal illumination, point-based and image-based rendering, and global\nvisibility computations. Finally, we discuss common concepts of\nvisibility algorithm design and several criteria for the\nclassification of visibility algorithms.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 198, 194 ], "issn": "0265-8135", "journal": "Environment and Planning B: Planning and Design", "number": "5", "pages_from": "729", "pages_to": "756", "volume": "30", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bittner-2003-Vis/", "__class": "Publication" }, { "id": "Artusi-2003-Col", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Novel Colour Printer Characterization Model", "date": "2003-07", "abstract": "A key problem in multimedia systems is the faithful reproduction of color. One of the main reasons why this is a complicated issue are the different color reproduction technologies used by the various devices; displays use easily modeled additive color mixing, while printers use a subtractive process, the characterization of which is much more complex than that of self--luminous displays.\r\n\r\nIn order to resolve these problems several processing steps are necessary, one of which is accurate device characterization. Our study examines different learning algorithms for one particular neural network technique which already has been found to be useful in related contexts -- namely radial basis function network models -- and proposes a modified learning algorithm which improves the colorimetric characterization process of printers.\r\n\r\nIn particular our results show that is possible to obtain good performance by using a learning algorithm that is trained on only small sets of color samples, and use it to generate a larger look--up table (LUT) through use of multiple polynomial regression or an interpolation algorithm. We deem our findings to be a good start point for further studies on learning algorithms used in conjunction with this problem.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191, 192 ], "issn": "1017-9909", "journal": "Journal of Electronic Imaging", "number": "3", "pages_from": "448", "pages_to": "458", "volume": "12", "research_areas": [], "keywords": [ "neural network", "Colorimetric characterization", "Radial basis function" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Artusi-2003-Col-paper.pdf", "type": "application/pdf", "size": 169403, "path": "Publication:Artusi-2003-Col", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Col/Artusi-2003-Col-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Col/Artusi-2003-Col-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Col/", "__class": "Publication" }, { "id": "PIRINGER-2003-HBOQ", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Occlusion Culling Using Hardware-Based Occlusion Queries", "date": "2003-07", "abstract": "Today, a major challenge of computer graphics is the generation of realistic images at rates that arouse the impression of fluid motion in the viewer. Of central importance in this context is the application of specialized hardware, which has experienced an impressive evolution in recent years, increasing both speed and functionality in a significant fashion. However, displaying complex scenes like whole cities requires dealing with such an amount of data, that dedicated acceleration algorithms are still necessary in order to cope with the tight temporal constraints. In doing so, methods for detecting invisible parts of the scenery play a key role. A particular challenge is classifying those objects in an efficient way which are invisible due to being entirely occluded by other objects in front of them. Although this visibility problem belongs to the classical tasks of computer graphics, just recently introduced extensions to the graphics hardware permit the design of new algorithms with fascinating opportunities, but also requirements that have been of no concern to previous approaches.\r\n\r\nThis master thesis deals with the task of developing an efficient algorithm for solving the visibility problem for arbitrary scenes, which is tailored towards the NV_occlusion_query OpenGL extension, in different ways:\r\n\r\nOne method approximates the potential occlusion within a given scenery from a certain viewpoint by constructing a directed acyclic graph, which is in turn used to be able to issue as many occlusion queries as possible in a concurrent fashion. Several extensions amend and improve the core algorithm by employing a more equal load balancing and exploiting both temporal and spatial coherence. Finally, this approach is extended by incorporating an appropriate spatial hierarchy.\r\n\r\nAlthough this technique is by and large significantly superior to rendering without occlusion culling, the obtained results are not satisfactory in every respect. Therefore, a second approach is proposed that does not rely on any graph. This hierarchical algorithm depends entirely on the visibility classification of previous frames and stresses thus the aspect of temporal coherence. Even though it is considerably simpler than the first approach, it yields superior and generally convincing results.\r\n\r\nBoth approaches are conservative (which means that they do not affect the correctness of the resulting image), but can easily be modified in a way that permits to trade off quality for speed by tolerating precisely definable mistakes.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 451 ], "supervisor": [ 193 ], "research_areas": [], "keywords": [ "real-time rendering", "occlusion queries", "occlusion culling" ], "weblinks": [], "files": [ { "description": "", "filetitle": "thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "PIRINGER-2003-HBOQ-thesis.pdf", "type": "application/pdf", "size": 1448952, "path": "Publication:PIRINGER-2003-HBOQ", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/PIRINGER-2003-HBOQ/PIRINGER-2003-HBOQ-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/PIRINGER-2003-HBOQ/PIRINGER-2003-HBOQ-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/PIRINGER-2003-HBOQ/", "__class": "Publication" }, { "id": "Wonka-2003-Ins", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Instant Architecture", "date": "2003-07", "abstract": "This paper presents a new method for the automatic modeling of architecture. Building designs are derived using split grammars, a new type of parametric set grammar based on the concept of shape. The paper also introduces an attribute matching system and a separate control grammar, which offer the flexibility required to model buildings using a large variety of different styles and design ideas. Through the adaptive nature of the design grammar used, the created building designs can either be generic or adhere closely to a specified goal, depending on the amount of data available.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 402, "image_height": 300, "name": "Wonka-2003-Ins-image.jpg", "type": "image/jpeg", "size": 21690, "path": "Publication:Wonka-2003-Ins", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 194, 193, 195, 287 ], "date_from": "2003-07-27", "date_to": "2003-07-31", "doi": "10.1145/882262.882324", "event": "ACM SIGGRAPH 2003", "issn": "0730-0301", "journal": "ACM Transaction on Graphics", "lecturer": [ 194, 193 ], "location": "San Diego, USA", "note": "Proceedings ACM SIGGRAPH 2003", "number": "3", "pages_from": "669", "pages_to": "677", "volume": "22", "research_areas": [ "Modeling" ], "keywords": [ "architecture", "shape grammars", "urban environments", "modeling", "real-time simulation", "building design" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 402, "image_height": 300, "name": "Wonka-2003-Ins-image.jpg", "type": "image/jpeg", "size": 21690, "path": "Publication:Wonka-2003-Ins", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wonka-2003-Ins-Paper.pdf", "type": "application/pdf", "size": 14620279, "path": "Publication:Wonka-2003-Ins", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-Paper:thumb{{size}}.png" }, { "description": null, "filetitle": "Small video", "main_file": false, "use_in_gallery": false, "access": "public", "preview_image_width": 320, "preview_image_height": 480, "name": "Wonka-2003-Ins-Small video.avi", "type": "video/x-msvideo", "size": 1359128, "path": "Publication:Wonka-2003-Ins", "preview_name": "Wonka-2003-Ins-Small video:preview.png", "preview_type": "image/jpeg", "preview_size": 15354, "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-Small video.avi", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-Small video:thumb{{size}}.png", "video_mp4": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/Wonka-2003-Ins-Small video:video.mp4" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wonka-2003-Ins/", "__class": "Publication" }, { "id": "Artusi-2003-CCG", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "L’importanza del Colore in Computer Graphics", "date": "2003-07", "abstract": "Il colore rappresenta un’importante caratteristica, della realtá, di particolare interesse per molte applicazioni come: fotografia e stampa digitale, computer graphics, film restoration, color science ecc. Nonostante questo, molto spesso non viene presa in considerazione nel modo adeguato. La conseguenza di questo, é una rappresentazione non corretta della scena, dal punto di vista qualitativo, che molto spesso non é adeguata per gli scopi prefissati.\nLa Computer Graphics, é una di quelle applicazioni in cui la componente colore é di particolare importanza. Ma per molto tempo una sua non corretta rappresentazione é stata usata. Solo negli ultimi anni sono state intorodotte diverse metodologie, giá in uso in Colore Science. In questo articolo verrá presentato il processo di integrazione della componente colore in Computer Graphics, e i suoi aspetti importanti.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191 ], "journal": "DDD_IL COLORE Rivista trimestrale Disegno e Design Digitale", "number": "5", "volume": "2", "research_areas": [], "keywords": [ "Colorimetric characterization", "Computer Graphics", "Colour", "Gamut Mapping" ], "weblinks": [], "files": [ { "description": null, "filetitle": "Italian paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Artusi-2003-CCG-Italian paper.pdf", "type": "application/pdf", "size": 409766, "path": "Publication:Artusi-2003-CCG", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-CCG/Artusi-2003-CCG-Italian paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-CCG/Artusi-2003-CCG-Italian paper:thumb{{size}}.png" } ], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-CCG/", "__class": "Publication" }, { "id": "Wimmer-2003-RTE", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Rendering Time Estimation for Real-Time Rendering", "date": "2003-06", "abstract": "This paper addresses the problem of estimating the rendering time for a real-time simulation. We study different\nfactors that contribute to the rendering time in order to develop a framework for rendering time estimation. Given\na viewpoint (or view cell) and a list of potentially visible objects, we propose several algorithms that can give\nreasonable upper limits for the rendering time on consumer hardware. This paper also discusses several implementation\nissues and design choices that are necessary to make the rendering time predictable. Finally, we lay\nout two extensions to current rendering hardware which would allow implementing a system with constant frame\nrates.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 484, "image_height": 388, "name": "Wimmer-2003-RTE-image.jpg", "type": "image/jpeg", "size": 28960, "path": "Publication:Wimmer-2003-RTE", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/Wimmer-2003-RTE-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/Wimmer-2003-RTE-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193, 194 ], "booktitle": "Rendering Techniques 2003 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2003-06-25", "date_to": "2003-06-27", "editor": "Per Christensen and Daniel Cohen-Or", "isbn": "3-905673-03-7", "lecturer": [ 193 ], "location": "Leuven, Belgium", "organization": "Eurographics", "pages_from": "118", "pages_to": "129", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "graphics hardware", "real-time rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 484, "image_height": 388, "name": "Wimmer-2003-RTE-image.jpg", "type": "image/jpeg", "size": 28960, "path": "Publication:Wimmer-2003-RTE", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/Wimmer-2003-RTE-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/Wimmer-2003-RTE-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wimmer-2003-RTE-Paper.pdf", "type": "application/pdf", "size": 2433769, "path": "Publication:Wimmer-2003-RTE", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/Wimmer-2003-RTE-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/Wimmer-2003-RTE-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Wimmer-2003-RTE/", "__class": "Publication" }, { "id": "matkovic-2003-wuka", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The 3D Wunderkammer, An Indexing by Placing Approach to the Image Storage and Retriveal", "date": "2003-06", "abstract": "The explosion of storage media size, and spreading of the\r\ninternet in the last decade resulted in a huge amount of images\r\nand multimedia material an average user has to deal\r\nwith. Traditional use of filenames and directories is just not\r\nsufficient any more. In contrast to the keywording and some\r\nkind of content based image retrieval, we introduce a novel\r\napproach of storing and retrieving images, and other multimedia\r\nmaterial using indexing by placing mechanism. The\r\nidea is to let the user place the images in the 3D environment,\r\nwhere the user can find the images easily again. The\r\nimages can be collected, modified, grouped together,... The\r\nprinciples described in the paper are implemented in the 3D\r\nWunderkammer system which is a multi-user client-server\r\napplication. The server is completely written in Java and\r\nthe client runs in a standard Web browser with a standard\r\nVRML plug-in.", "authors_et_al": false, "substitute": null, "main_image": { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 190, "image_height": 110, "name": "matkovic-2003-wuka-jpg.jpg", "type": "image/jpeg", "size": 23113, "path": "Publication:matkovic-2003-wuka", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/matkovic-2003-wuka-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/matkovic-2003-wuka-jpg:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 235, 630, 450, 26, 586 ], "booktitle": "Proceedings of Theory and Practice of Computer Graphics (TPCG) 2003", "date_from": "2003-06-03", "date_to": "2003-06-05", "isbn": "0769519423", "lecturer": [ 235 ], "location": "Birmingham, UK", "organization": "University of Birmingham ", "publisher": "IEEE Computer Society Press,U.S. ", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 190, "image_height": 110, "name": "matkovic-2003-wuka-jpg.jpg", "type": "image/jpeg", "size": 23113, "path": "Publication:matkovic-2003-wuka", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/matkovic-2003-wuka-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/matkovic-2003-wuka-jpg:thumb{{size}}.png" }, { "description": "paper", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "matkovic-2003-wuka-pdf.pdf", "type": "application/pdf", "size": 1103795, "path": "Publication:matkovic-2003-wuka", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/matkovic-2003-wuka-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/matkovic-2003-wuka-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/matkovic-2003-wuka/", "__class": "Publication" }, { "id": "Artusi-2003-Del", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Delivering Interactivity to Complex Tone Mapping Operators", "date": "2003-06", "abstract": "The accurate display of high dynamic range images requires the application of complex tone mapping operators. These operators are computationally costly, which prevents their usage in interactive applications. We propose a general framework that delivers interactive performance to an important subclass of tone mapping operators, namely global tone mapping operators. The proposed framework consists of four steps: sampling the input image, applying the tone mapping operator, tting the point-sampled tone mapping curve, and reconstructing the tone mapping curve for all pixels of the input image. We show how to make use of recent graphics hardware while keeping the advantage of generality by performing tone mapping in software. We demonstrate the capabilities of our method by accelerating several common global tone mapping operators and integrating the operators in a real-time rendering application.", "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": 768, "name": "Artusi-2003-Del-image.jpg", "type": "image/jpeg", "size": 140358, "path": "Publication:Artusi-2003-Del", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/Artusi-2003-Del-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/Artusi-2003-Del-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191, 198, 193, 192 ], "booktitle": "Rendering Techniques 2003 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2003-06-25", "date_to": "2003-06-27", "editor": "Per Christensen and Daniel Cohen-Or", "isbn": "3-905673-03-7", "lecturer": [ 191 ], "location": "Leuven, Belgium", "organization": "Eurographics", "pages_from": "38", "pages_to": "44", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 768, "name": "Artusi-2003-Del-image.jpg", "type": "image/jpeg", "size": 140358, "path": "Publication:Artusi-2003-Del", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/Artusi-2003-Del-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/Artusi-2003-Del-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Artusi-2003-Del-Paper.pdf", "type": "application/pdf", "size": 16156109, "path": "Publication:Artusi-2003-Del", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/Artusi-2003-Del-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/Artusi-2003-Del-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "realreflect" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Artusi-2003-Del/", "__class": "Publication" }, { "id": "Kanitsar-2003-ADV", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Advanced Curved Planar Reformation: Flattening of Vascular Structures", "date": "2003-05", "abstract": "Traditional volume visualization techniques may provide incomplete clinical information needed for many\napplications in medical visualization. Especially in the area of vascular visualization important features\nsuch as the patent lumen of a diseased vessel segment may not be visible. Curved Planar Reformation (CPR)\nhas proven to be an acceptable practical solution. Existing CPR techniques, however, still have diagnostically\nrelevant limitations. In this paper we introduce two advanced methods for efficient vessel visualization,\nbased on the concept of CPR. Both methods benefit from relaxation of spatial coherence in favor of improved\nfeature perception. We present a new technique to visualize the interior of a vessel in a single image. A\nvessel is re-sampled along a spiral around the vessel central axis. The helical spiral depicts the vessel\nvolume. Furthermore, a method to display an entire vascular tree without mutually occluding vessels is\npresented. Minimal rotations around the branching points of a vessel tree eliminate occlusions. For each viewing\n direction the entire vessel structure is visible.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 162, 165, 164, 166 ], "number": "TR-186-2-03-08", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "curved planar reformation", "vessel analysis", "computed tomography angiography" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Kanitsar-2003-ADV-paper.pdf", "type": "application/pdf", "size": 2427747, "path": "Publication:Kanitsar-2003-ADV", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Kanitsar-2003-ADV/Kanitsar-2003-ADV-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Kanitsar-2003-ADV/", "__class": "Publication" }, { "id": "Mattausch-2003-SIE", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Strategies for Interactive Exploration of 3D Flow Using Evenly-Spaced Illuminated Streamlines", "date": "2003-04", "abstract": "This paper presents several strategies to\r\ninteractively explore 3D flow. Based on a fast\r\nilluminated streamlines algorithm, standard graphics\r\nhardware is sufficient to gain interactive rendering\r\nrates. Our approach does not require the user to\r\nhave any prior knowledge of flow features. After the\r\nstreamlines are computed in a short preprocessing\r\ntime, the user can interactively change appearance\r\nand density of the streamlines to further explore the\r\nflow. Most important flow features like velocity or\r\npressure not only can be mapped to all available\r\nstreamline appearance properties like streamline\r\nwidth, material, opacity, but also to streamline\r\ndensity. To improve spatial perception of the 3D\r\nflow we apply techniques based on animation, depth\r\ncueing, and halos along a streamline if it is crossed\r\nby another streamline in the foreground. Finally, we\r\nmake intense use of focus+context methods like magic\r\nvolumes, region of interest driven streamline\r\nplacing, and spotlights to solve the occlusion\r\n problem.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 326, 175, 176, 166 ], "number": "TR-186-2-03-04", "pages_from": "1", "pages_to": "10", "research_areas": [], "keywords": [ "3D flow visualization", "illuminated streamlines", "interactive exploration", "focus+context visualization" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Mattausch-2003-SIE-paper.pdf", "type": "application/pdf", "size": 739785, "path": "Publication:Mattausch-2003-SIE", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-SIE/Mattausch-2003-SIE-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-SIE/", "__class": "Publication" }, { "id": "Mattausch-2003-Str", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Strategies for Interactive Exploration of 3D Flow Using Evenly-Spaced Illuminated Streamlines", "date": "2003-04", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 326, 175, 176, 166 ], "booktitle": "Proceedings of Spring Conference on Computer Graphics", "editor": "K. Joy", "isbn": "158113861x", "pages_from": "213 ", "pages_to": "222", "publisher": "SCCG", "research_areas": [], "keywords": [ "flow visualization", "streamlines", "focus and context" ], "weblinks": [], "files": [], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-Str/", "__class": "Publication" }, { "id": "Knapp-2003-SAT", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Semi-Automatic Topology Independent Contour-Based 2 1/2 D Segmentation Using Live-Wire", "date": "2003-03", "abstract": "In general three-dimensional segmentation algorithms assume\nobjects to have connected homogeneous regions. However in some\ncases objects are defined by a fuzzy boundary surface and consist\nof an inhomogeneous internal structure. In the following a new\nthree-dimensional segmentation technique exploiting the contour\ndetection capabilities of live-wire is proposed: The algorithm\nconsists of two basic steps. First contours are outlined by the\nuser on a small number of planar cross-sections through the object\nusing live-wire. Second the traced contours are used for\nreconstructing the object surface automatically in each slice\nusing live-wire again. This user-friendly segmentation algorithm\nis independent from object topology as the topology is implicitly\n defined during the reconstruction process.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 172, 162, 166 ], "number": "TR-186-2-03-06", "pages_from": "1", "pages_to": "10", "research_areas": [], "keywords": [ "connectivity graph", "image processing", "live-wire", "segmentation" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Knapp-2003-SAT-paper.gz", "type": "application/x-empty", "size": 0, "path": "Publication:Knapp-2003-SAT", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Knapp-2003-SAT/Knapp-2003-SAT-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Knapp-2003-SAT/", "__class": "Publication" }, { "id": "Ulbricht-2003-TanX", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Tangible Augmented Reality for Computer Games", "date": "2003-02", "abstract": "In this paper we attempt to demonstrate that Tangible\r\nAugmented Reality is a highly effective environment for certain types\r\nof multiplayer computer games. We show the usefulness of this user\r\ninteraction paradigm through both theoretical argumentation and\r\npresentation of our prototype system. During the development of this\r\nsystem we evaluated several variants of the interaction techniques\r\nnecessary for the game, and we discuss the relative merits of some of\r\n them in this paper.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 576, "image_height": 424, "name": "Ulbricht-2003-TanX-.jpg", "type": "image/jpeg", "size": 116096, "path": "Publication:Ulbricht-2003-TanX", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-TanX/Ulbricht-2003-TanX-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-TanX/Ulbricht-2003-TanX-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 225, 202 ], "number": "TR-186-2-03-02", "pages_from": "1", "pages_to": "5", "research_areas": [], "keywords": [ "User Interface Design", "3D-Interaction", "Tangible User Interface", "Augmented Reality" ], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 576, "image_height": 424, "name": "Ulbricht-2003-TanX-.jpg", "type": "image/jpeg", "size": 116096, "path": "Publication:Ulbricht-2003-TanX", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-TanX/Ulbricht-2003-TanX-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-TanX/Ulbricht-2003-TanX-:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Ulbricht-2003-TanX-paper.gz", "type": "application/octet-stream", "size": 910640, "path": "Publication:Ulbricht-2003-TanX", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-TanX/Ulbricht-2003-TanX-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-TanX/", "__class": "Publication" }, { "id": "Zotti-2003-AMP", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "A Multi-Purpose Virtual Reality Model of the Solar System (VRMoSS)", "date": "2003-02", "abstract": "This paper describes the development of the 3D graphics part of an\nastronomical education installation for school children, called the\nVirtual Control Room, as part of the ASH project (IST-1999-10859). The\ncontent is a very detailed model of our Solar System, which can be\nused with an augmented reality interface or remote controlled with an\n external XML capable control application.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222, 237 ], "number": "TR-186-2-03-01", "pages_from": "1", "pages_to": "10", "research_areas": [ "Modeling" ], "keywords": [ "Astronomy and Space Education", "Educational Application", "Augmented Reality" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Zotti-2003-AMP-paper.gz", "type": "application/octet-stream", "size": 5215236, "path": "Publication:Zotti-2003-AMP", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Zotti-2003-AMP/Zotti-2003-AMP-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Zotti-2003-AMP/", "__class": "Publication" }, { "id": "zotti-2003-ash", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The ASH Virtual Reality Model of the Solar System (VRMoSS)", "date": "2003", "abstract": "This paper describes the development of the 3D graphics part of an astronomical education installation for school children, called the Virtual Control Room. The content is a very detailed model of the Solar System, which can be used with an augmented reality interface or remote controlled with an external XML capable control application.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222, 237 ], "address": "Anaheim, Calgary, Zurich", "booktitle": "Proc. of the Third IASTED Int. Conf. on Visualization, Imaging, and Image Processing", "editor": "M. H. Hamza", "isbn": "0-88986-382-2", "lecturer": [ 222 ], "organization": "IASTED", "pages_from": "964", "pages_to": "969", "publisher": "ACTA Press", "research_areas": [ "Modeling" ], "keywords": [ "Augmented Reality", "Educational Application", "Astronomy and Space Education" ], "weblinks": [], "files": [], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/zotti-2003-ash/", "__class": "Publication" }, { "id": "Mattausch-2003-ISL", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Evenly-Spaced Illuminated Streamlines in 3D", "date": "2003", "abstract": "http://www.cg.tuwien.ac.at/courses/projekte_old/vis/finished/OMattausch/Flow3DWeb/index.htm", "authors_et_al": false, "substitute": null, "main_image": { "description": "Screenshot", "filetitle": "picture", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 704, "image_height": 547, "name": "Mattausch-2003-ISL-picture.jpg", "type": "image/jpeg", "size": 70810, "path": "Publication:Mattausch-2003-ISL", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-picture.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-picture:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 326 ], "supervisor": [ 175 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "Flow3D Binaries", "filetitle": "binaries", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Mattausch-2003-ISL-binaries.zip", "type": "application/x-zip", "size": 68781, "path": "Publication:Mattausch-2003-ISL", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-binaries.zip", "thumb_image_sizes": [] }, { "description": "Documentation", "filetitle": "documentation", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Mattausch-2003-ISL-documentation.zip", "type": "application/x-zip", "size": 337137, "path": "Publication:Mattausch-2003-ISL", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-documentation.zip", "thumb_image_sizes": [] }, { "description": "Screenshot", "filetitle": "picture", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 704, "image_height": 547, "name": "Mattausch-2003-ISL-picture.jpg", "type": "image/jpeg", "size": 70810, "path": "Publication:Mattausch-2003-ISL", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-picture.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-picture:thumb{{size}}.png" }, { "description": "Smog dataset", "filetitle": "picture2", "main_file": true, "use_in_gallery": true, "access": "public", "image_width": 466, "image_height": 440, "name": "Mattausch-2003-ISL-picture2.jpg", "type": "image/jpeg", "size": 47576, "path": "Publication:Mattausch-2003-ISL", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-picture2.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-picture2:thumb{{size}}.png" }, { "description": "Flow3D Sourcecode", "filetitle": "source", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Mattausch-2003-ISL-source.zip", "type": "application/x-zip", "size": 1663453, "path": "Publication:Mattausch-2003-ISL", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/Mattausch-2003-ISL-source.zip", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Mattausch-2003-ISL/", "__class": "Publication" }, { "id": "Konyha-2003-Int", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive 3D Visualization of Rigid Body Systems", "date": "2003", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 756, 235, 176 ], "booktitle": "Proceedings of IEEE Visualization", "editor": "G. Turk, J. van Wijk, K. Moorhead", "isbn": "0780381203", "pages_from": "539", "pages_to": "546", "publisher": "IEEE", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Konyha-2003-Int/", "__class": "Publication" }, { "id": "neumann-2003-color", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Color Appearance in Multispectral Radiosity", "date": "2003", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 418, "image_height": 395, "name": "neumann-2003-color-image.jpg", "type": "image/jpeg", "size": 36189, "path": "Publication:neumann-2003-color", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/neumann-2003-color-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/neumann-2003-color-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 177, 457, 232, 207 ], "booktitle": "Proceedings on the 2nd Hungarian Computergraphics and Geometry Conference", "editor": "L. Szirmay-Kalos, G. Renner", "isbn": "9634207669", "pages_from": "183", "pages_to": "194", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 418, "image_height": 395, "name": "neumann-2003-color-image.jpg", "type": "image/jpeg", "size": 36189, "path": "Publication:neumann-2003-color", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/neumann-2003-color-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/neumann-2003-color-image:thumb{{size}}.png" }, { "description": null, "filetitle": "PDF", "main_file": true, "use_in_gallery": false, "access": "public", "name": "neumann-2003-color-PDF.pdf", "type": "application/pdf", "size": 485386, "path": "Publication:neumann-2003-color", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/neumann-2003-color-PDF.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/neumann-2003-color-PDF:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/neumann-2003-color/", "__class": "Publication" }, { "id": "Psik-2003-IPI", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The Invisible Person: Advanced Interaction Using an Embedded Interface", "date": "2003", "abstract": " We describe an advanced user interface enabling even playing games in an immersive virtual environment. There are no common input devices, users presence in the environment, movements, and body postures are only available tools for interacting with totally hidden computer. Furthermore, a publicly accessible installation in the Vienna Museum of Technology implementing such an advanced environment is described. In this installation computers are totally hidden, and it is one of the most popular exhibits in the museum, which has been accessed by more than 200,000 visitors since September 1999.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 26, 235, 453, 454, 234 ], "booktitle": " Proceedings of Eurographics/Frauenhofer IAO Workshop on Virtual Environments 2003", "location": "New York, NY", "organization": "Eurographics", "pages_from": "29", "pages_to": "37", "series": " Proceedings of Eurographics", "research_areas": [], "keywords": [ "museum installation", "user interface", "digital character", "virtual environment", "interactive" ], "weblinks": [], "files": [ { "description": null, "filetitle": "full paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Psik-2003-IPI-full paper.pdf", "type": "application/pdf", "size": 681152, "path": "Publication:Psik-2003-IPI", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Psik-2003-IPI/Psik-2003-IPI-full paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Psik-2003-IPI/Psik-2003-IPI-full paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Psik-2003-IPI/", "__class": "Publication" }, { "id": "Straka-2003-3DW", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "3D Watershed Transform Combined with a Probabilistic Atlas for Medical Image Segmentation", "date": "2003", "abstract": " Recent advances in medical imaging technology using multiple detector-row computed tomography (CT) provide volumetric datasets with unprecedented spatial resolution. This has allowed for CT to evolve into an excellent non-invasive vascular imaging technology, commonly referred to as CT-angiography. Visualization of vascular structures from CT datasets is demanding, however, and identification of anatomic objects in CT-datasets is highly desirable. Density and/or gradient operators have been used most commonly to classify CT data. In CT angiography, simple density/gradient operators do not allow precise and reliable classification of tissues due to the fact that different tissues (e.g. bones and vessels) possess the same density range and may lie in close spatial vicinity. We hypothesize, that anatomic classification can be achieved more accurately, if both spatial location and density properties of volume data are taken into account. We present a combination of two well-known methods for volume data processing to obtain accurate tissue classification. 3D watershed transform is used to partition the volume data in morphologically consistent blocks and a probabilistic anatomic atlas is used to distinguish between different kinds of tissues based on their density.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2003-3DW-.pdf", "type": "application/pdf", "size": 1481982, "path": "Publication:Straka-2003-3DW", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-3DW/Straka-2003-3DW-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-3DW/Straka-2003-3DW-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 168, 169, 170, 166, 164 ], "booktitle": "MIT 2003", "journal": "Journal of Medical Informatics & Technologies", "research_areas": [], "keywords": [ "Thin-Plate-Spline", "Knowledge Based Segmentation Probabilist", "CT Angiography", "Histogram Classification" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2003-3DW-.pdf", "type": "application/pdf", "size": 1481982, "path": "Publication:Straka-2003-3DW", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-3DW/Straka-2003-3DW-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-3DW/Straka-2003-3DW-:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-3DW/", "__class": "Publication" }, { "id": "Straka-2003-Apr", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "A probabilistic atlas of the lower extremity arterial tree for perpheral CT angiography", "date": "2003", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 170, 168, 169, 166, 164 ], "booktitle": "European Congress of Radiology", "publisher": "ECR", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "PDF", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2003-Apr-PDF.pdf", "type": "application/pdf", "size": 10487, "path": "Publication:Straka-2003-Apr", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Apr/Straka-2003-Apr-PDF.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Apr/Straka-2003-Apr-PDF:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Straka-2003-Apr/", "__class": "Publication" }, { "id": "Theussl-2003-Rec", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Reconstruction issues in volume visualization", "date": "2003", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 175, 336, 187, 166 ], "booktitle": "Data Visualization: The state of the art", "editor": "F. Post, G. Nielson, G.P. Bonneau", "isbn": "1402072597", "pages_from": "109", "pages_to": "124", "publisher": "Kluwer Academic Publishers", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Theussl-2003-Rec/", "__class": "Publication" }, { "id": "Ulbricht-2003-Tan", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Tangible Augmented Reality for Computer Games", "date": "2003", "abstract": "In this paper we attempt to demonstrate that Tangible Augmented Reality is a highly effective environment for certain types of multiplayer computer games. We show the usefulness of this user interaction paradigm through both theoretical argumentation and presentation of our prototype system. During the development of this system we evaluated several variants of the interaction techniques necessary for the game, and we discuss the relative merits of some of them in this paper.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 225, 202 ], "booktitle": "Proceedings of the Third IASTED International Conference on Visualization, Imaging and Image Processing", "isbn": "ISBN: 0889863822", "lecturer": [ 1305 ], "note": "http://www.cg.tuwien.ac.at/~cu/tangibleAR/", "pages_from": "950", "pages_to": "954", "publisher": "ACTA Press", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Ulbricht-2003-Tan/", "__class": "Publication" }, { "id": "viola-2003-hbn", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Hardware-Based Nonlinear Filtering and Segmentation using High-Level Shading Languages Visualization", "date": "2003", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171 ], "date_from": "2003-10-23", "event": "Visualization", "location": "Seattle, USA", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "slides", "main_file": true, "use_in_gallery": false, "access": "public", "name": "viola-2003-hbn-slides.ppt", "type": "application/msword", "size": 1370112, "path": "Publication:viola-2003-hbn", "url": "https://www.cg.tuwien.ac.at/research/publications/2003/viola-2003-hbn/viola-2003-hbn-slides.ppt", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/viola-2003-hbn/", "__class": "Publication" }, { "id": "xmas-2003", "type_id": "xmascard", "tu_id": null, "repositum_id": null, "title": "X-Mas 2003", "date": "2003", "abstract": "25 Jahre Computergraphik an der TU Wien\r\n\r\nGeschichte ist eng mit Personen verbunden. Die Geschichte der Computergraphik an der Technischen Universität Wien begann unabhängig voneinander an zwei Instituten. In beiden Fällen entstanden die ersten Diplomarbeiten im Jahr 1978. Eine Initiative begann mit Johann Weiß, der sich mit dem Tracken von Lichtstiften beschäftigte, und Georg Stonawski, der eine Diplomarbeit über GKS schrieb. Die zweite Initiative kam von Prof. Wilhelm Barth, der die zwei Diplomanden Emanuel Wenger und Edwin Scherzer die Programmiersprache Pascal um graphische Elemente erweitern ließ. Im Jahr 1980 begann Werner Purgathofer zusammen mit einigen anderen bei Prof. Barth als Assistent und schloss 1984 seine Dissertation ab. Anschließend baute er zusammen mit Michael Gervautz und anderen eine Computergraphik-Arbeitsgruppe auf, die hauptsächlich im Bereich Rendering aktiv war. Als Werner Purgathofer 1988 Professor wurde, stellte er M. Eduard Gröller ein, der die Arbeitsgruppe für Visualisierung gründete. 1990 wurde das Institut in \"Institut für Computergraphik\" umbenannt, 1991 organisierte die Gruppe die Jahrestagung der Eurographics in der Wiener Hofburg. Bald danach begann Michael Gervautz im Bereich Virtual Reality zu forschen, woraufhin er 1998 die Spinoff-Firma \"Imagination\" gründete und Dieter Schmalstieg die Leitung der Virtual Reality-Gruppe übernahm. Anfang 2000 gründete das Institut zusammen mit anderen ein Kompetenzzentrum für Virtual Reality und Visualisierung (VRVis), in dem jetzt Georg Stonawski Geschäftsführer und Helwig Hauser wissenschaftlicher Direktor sind. Nach diesen 25 Jahren arbeiten heute in Wien mehr als 100 Personen im Bereich innovativer Computergraphik.\r\n\r\nDie Karte wurde unter Verwendung von Adobe Illustrator und Photoshop auf einem Apple iBook produziert. Für die Farbkalibration des bei der Herstellung der physischen Karten verwendeten Druckers wurde die Software ProfileMaker von Gretag Macbeth verwendet.\r\n\r\nIdee: Werner Purgathofer\r\nBilder: Der Meister, Emanuel Wenger, Michael Gervautz, Robert F. Tobler, Michael Feda, Christoph Traxler, Michael Wimmer, Alexander Wilkie, Helwig Hauser, Anton L. Fuhrmann und das Kollektiv der Visualisierungsgruppe\r\nHerstellung: Alexander Wilkie \r\n\r\n\r\n25 Years of Computer Graphics at the TU Vienna\r\n\r\nHistory is strongly connected to people. The history of Computer Graphics at the Vienna University of Technology began independently at two institutes. In both cases the first diploma theses were written in 1978. One initiative was started by Johann Weiss, who implemented the tracking of a light pen, and Georg Stonawski, who wrote a thesis about GKS. The second initiative was by Prof. Wilhelm Barth, who worked with the two diploma students Emanuel Wenger and Edwin Scherzer on extending the programming language Pascal with graphical elements. Amongst others, Werner Purgathofer started to work as an assistant of Prof. Barth in 1980, and finished his PhD in 1984. Together with Michael Gervautz and other colleagues, he then built up a Computer Graphics group that was active mainly in the area of Rendering. When Werner Purgathofer became Professor in 1988, he employed M. Eduard Gröller, who in turn founded a Visualisation research group. In 1990 the institute was renamed to \"Institute of Computer Graphics\", in 1991 the group organized the annual Eurographics conference in the Vienna Hofburg. Soon after that, Michael Gervautz started research in the area of Virtual Reality, which led to the founding of the spin-off company \"Imagination\" in 1998. Since then, the Virtual Reality group was led by Dieter Schmalstieg. Together with others, the institute created a competence center for Virtual Reality and Visualisation (VRVis) in January 2000, of which Georg Stonawski is the CEO and Helwig Hauser is the scientific director. After these 25 years, there are now more than 100 people in Vienna working in the field of innovative Computer Graphics.\r\n\r\nThe card was produced using Adobe Illustrator and Photoshop on an Apple iBook. The colour calibration of the printer used for the production of the pysical cards was performed using Gretag Macbeth ProfileMaker software.\r\n\r\nIdea: Werner Purgathofer\r\nImages by: The Master, Emanuel Wenger, Michael Gervautz, Robert F. Tobler, Michael Feda, Christoph Traxler, Michael Wimmer, Alexander Wilkie, Helwig Hauser, Anton L. 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