[ { "id": "Theussl-2002-RSH", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Reconstruction Schemes for High Quality Raycasting of the Body-Centered Cubic Grid", "date": "2002-12", "abstract": "The body-centered cubic (BCC) grid has received attention\r\nin the volume visualization community recently due to its\r\nability to represent the same data with almost 30\\% fewer\r\nsamples as compared to the Cartesian cubic (CC) grid.\r\nIn this paper we present several resampling strategies for\r\nraycasting BCC grids. These strategies range from 2D\r\ninterpolation in planes to piece-wise linear (barycentric)\r\ninterpolation in a tetrahedral decomposition of the grid\r\nto trilinear and sheared trilinear interpolation. We compare\r\nthem to raycasting with comparable resampling techniques in the\r\ncommonly used CC grid in terms of computational complexity and\r\n visual quality.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 175, 326, 196, 166 ], "number": "TR-186-2-02-11", "pages_from": "1", "pages_to": "9", "research_areas": [], "keywords": [ "interpolation", "body-centered cubic grid", "raycasting" ], "weblinks": [], "files": [ { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Theussl-2002-RSH-paper.pdf", "type": "application/pdf", "size": 783454, "path": "Publication:Theussl-2002-RSH", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Theussl-2002-RSH/Theussl-2002-RSH-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Theussl-2002-RSH/Theussl-2002-RSH-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Theussl-2002-RSH/", "__class": "Publication" }, { "id": "neumann-2002-globcon", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The Global Contrast Factor", "date": "2002-11", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 177, 235, 190 ], "booktitle": "Seminar on Computer Graphics and Visualization", "editor": "E. Carling, A. Hast", "location": "Gavle, Sweden", "organization": "University of Gavle", "pages_from": "108", "pages_to": "119", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/neumann-2002-globcon/", "__class": "Publication" }, { "id": "Hadwiger-2002-Fas", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Fast and Flexible High-Quality Texture Filtering With Tiled High-Resolution Filters", "date": "2002-11", "abstract": "Current graphics hardware offers only very limited\r\nsupport for convolution operations, which is primarily\r\nintended for image processing. The input and\r\noutput sample grids have to coincide, making it impossible\r\nto use these features for more general filtering\r\ntasks such as image or texture resampling. Furthermore,\r\nmost hardware employs linear interpolation\r\nfor texture reconstruction purposes, incurring\r\nnoticeable artifacts. Higher-order interpolation via\r\ngeneral convolution is able to remove most of these\r\nartifacts. Real-time applications currently do not\r\nconsider higher-order filtering due to lack of hardware\r\nsupport. We present algorithms for extremely\r\nfast convolution on graphics hardware. This framework\r\ncan be used for general convolution tasks,\r\nbut is especially suited to substituting the native bilinear\r\nor tri-linear interpolation currently used for\r\ntexture magnification, while still achieving frame\r\nrates of up to 100 frames per second for full screen\r\nfiltering with bi-cubic interpolation.", "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": 202, "name": "Hadwiger-2002-Fas-image.jpg", "type": "image/jpeg", "size": 3996, "path": "Publication:Hadwiger-2002-Fas", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/Hadwiger-2002-Fas-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/Hadwiger-2002-Fas-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 226, 171, 175, 176 ], "booktitle": "Vision, Modeling and Visualization 2002", "pages_from": "155", "pages_to": "162", "publisher": "Akademische Verlagsgesellschaft Aka GmbH, Berlin", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 200, "image_height": 202, "name": "Hadwiger-2002-Fas-image.jpg", "type": "image/jpeg", "size": 3996, "path": "Publication:Hadwiger-2002-Fas", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/Hadwiger-2002-Fas-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/Hadwiger-2002-Fas-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Hadwiger-2002-Fas-Paper.pdf", "type": "application/pdf", "size": 7403232, "path": "Publication:Hadwiger-2002-Fas", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/Hadwiger-2002-Fas-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/Hadwiger-2002-Fas-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hadwiger-2002-Fas/", "__class": "Publication" }, { "id": "Csebfalvi-2002-SBICG", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Smooth Shape-Based Interpolation using the Conjugate Gradient Method", "date": "2002-08", "abstract": "In this paper a novel technique for smooth shape-based interpolation of volume data\r\nis introduced.\r\nPreviously simple linear interpolation of signed\r\ndistance maps has been used in practice. As it will be shown, this approach\r\nresults in artifacts, since sharp edges appear along the original slices.\r\nIn order to obtain a smooth 3D implicit function generated\r\nby interpolating 2D distance maps, we use a global interpolation method instead of a\r\nhigher order local technique. The global curvature of the implicit function representing\r\nan isosurface is minimized using an iterative conjugate gradient method.\r\nBecause of the iterative approach the user can easily control the trade-off between\r\nthe smoothness of the isosurface and the computational cost of the refinement.\r\nAs opposed to previous techniques, like variational interpolation, our method can\r\ngenerate a reasonably good approximation of the ideal solution in a significantly\r\n shorter time.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 233, 177, 162, 166 ], "number": "TR-186-2-02-10", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "shape-based interpolation", "conjugate gradient method", "volume rendering" ], "weblinks": [], "files": [ { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Csebfalvi-2002-SBICG-paper.gz", "type": "application/octet-stream", "size": 953100, "path": "Publication:Csebfalvi-2002-SBICG", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Csebfalvi-2002-SBICG/Csebfalvi-2002-SBICG-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Csebfalvi-2002-SBICG/", "__class": "Publication" }, { "id": "Wallisch-2002-INF", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Information Highlighting by Color Dependent Depth Perception with Chromo-Stereoscopy", "date": "2002-07", "abstract": "Due to characteristics of the human visual system different colors induce different\ndepth perception. This chromo-stereoscopy has been already used for 3D data to enhance\na third spatial dimension. We propose to use chromo-stereoscopy for 2D abstract data.\nColor coding introduces a depth cue which encodes relevance with chromo-stereoscopy.\nThe focus information literally stands out as compared to the context information.\nWe applied this technique on two-dimensional graphs and multi-layer representations.\n Our approach can also be easily combined with other focus+context methods.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 181, 182, 162, 166 ], "number": "TR-186-2-02-08", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "animation", "multi-layer", "graphs", "focus+context", "chromo-stereoscopy" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wallisch-2002-INF-paper.pdf", "type": "application/pdf", "size": 756342, "path": "Publication:Wallisch-2002-INF", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Wallisch-2002-INF/Wallisch-2002-INF-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Wallisch-2002-INF/", "__class": "Publication" }, { "id": "Jeschke-2002-TDMR", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Textured Depth Meshes for Real-Time Rendering of Arbitrary Scenes", "date": "2002-06", "abstract": "This paper presents a new approach to generate textured depth\nmeshes (TDMs), an impostor-based scene representation that can be\nused to accelerate the rendering of static polygonal models. The\nTDMs are precalculated for a fixed viewing region (view cell).\n\nThe approach relies on a layered rendering of the scene to produce\na voxel-based representation. Secondary, a highly complex polygon\nmesh is constructed that covers all the voxels. Afterwards, this\nmesh is simplified using a special error metric to ensure that all\nvoxels stay covered. Finally, the remaining polygons are resampled\nusing the voxel representation to obtain their textures.\n\nThe contribution of our approach is manifold: first, it can handle\npolygonal models without any knowledge about their structure.\nSecond, only scene parts that may become visible from within the\nview cell are represented, thereby cutting down on impostor\ncomplexity and storage costs. Third, an error metric guarantees\nthat the impostors are practically indistinguishable compared to\nthe original model (i.e. no rubber-sheet effects or holes appear\nas in most previous approaches). Furthermore, current graphics\nhardware is exploited for the construction and use of the\nimpostors.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 282, "image_height": 202, "name": "Jeschke-2002-TDMR-image.jpg", "type": "image/jpeg", "size": 14976, "path": "Publication:Jeschke-2002-TDMR", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-TDMR/Jeschke-2002-TDMR-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-TDMR/Jeschke-2002-TDMR-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 356, 193 ], "booktitle": "Rendering Techniques 2002 (Proceedings Eurographics Workshop on Rendering)", "date_from": "2002-06-26", "date_to": "2002-06-28", "editor": "Paul Debevec and Simon Gibson", "isbn": "1-58133-534-3", "lecturer": [ 356 ], "location": "Pisa, Italy", "organization": "Eurographics", "pages_from": "181", "pages_to": "190", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "Rendering", "Walkthrough", "Computer Graphics", "Impostors" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 282, "image_height": 202, "name": "Jeschke-2002-TDMR-image.jpg", "type": "image/jpeg", "size": 14976, "path": "Publication:Jeschke-2002-TDMR", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-TDMR/Jeschke-2002-TDMR-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-TDMR/Jeschke-2002-TDMR-image:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-TDMR/", "__class": "Publication" }, { "id": "Neumann-2002-Fea", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Feature-Preserving Volume Filtering", "date": "2002-05", "abstract": "In this paper a feature-preserving volume filtering method is presented. The basic idea is to minimize a three-component global error function penalizing the density and gradient errors and the curvature of the unknown filtered function. The optimization problem leads to a large linear equation system defined by a sparse coefficient matrix. We will show that such an equation system can be efficiently solved in frequency domain using fast Fourier transformation (FFT). For the sake of clarity, first we illustrate our method on a 2D example which is a dedithering problem. Afterwards the 3D extension is discussed in detail since we propose our method mainly for volume filtering. We will show that the 3D version can be efficiently used for elimination of the typical staircase artifacts of direct volume rendering without losing fine details. Unlike local filtering techniques, our novel approach ensures a global smoothing effect. Previous global 3D methods are restricted to binary volumes or segmented iso-surfaces and they are based on area minimization of one single reconstructed surface. In contrast, our method is a general volume-filtering technique, implicitly smoothing all the iso-surfaces at the same time. Although the strength of the presented algorithm is demonstrated on a specific 2D and a specific 3D application, it is considered as a general mathematical tool for processing images and volumes.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 718, "image_height": 717, "name": "Neumann-2002-Fea-image.jpg", "type": "image/jpeg", "size": 96628, "path": "Publication:Neumann-2002-Fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/Neumann-2002-Fea-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/Neumann-2002-Fea-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 177, 233, 171, 179, 166 ], "booktitle": "Data Visualization 2002", "pages_from": "105", "pages_to": "114", "publisher": "ACM", "research_areas": [], "keywords": [ "antialiasing, noise filtering", "derivative and gradient estimation", "feature-preserving smoothing", "direct volume rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 718, "image_height": 717, "name": "Neumann-2002-Fea-image.jpg", "type": "image/jpeg", "size": 96628, "path": "Publication:Neumann-2002-Fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/Neumann-2002-Fea-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/Neumann-2002-Fea-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Neumann-2002-Fea-Paper.pdf", "type": "application/pdf", "size": 835899, "path": "Publication:Neumann-2002-Fea", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/Neumann-2002-Fea-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/Neumann-2002-Fea-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Neumann-2002-Fea/", "__class": "Publication" }, { "id": "Jeschke-2002-LEMA", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Layered Environment-Map Impostors for Arbitrary Scenes", "date": "2002-05", "abstract": "This paper presents a new impostor-based approach to\naccelerate the rendering of very complex static scenes. The scene\nis partitioned into viewing regions, and a layered impostor\nrepresentation is precalculated for each of them. An optimal\nplacement of impostor layers guarantees that our representation is\nindistinguishable from the original geometry. Furthermore the\nalgorithm exploits common graphics hardware both during\npreprocessing and rendering. Moreover the impostor representation\nis compressed using several strategies to cut down on storage\n space.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1272, "image_height": 1272, "name": "Jeschke-2002-LEMA-image.jpg", "type": "image/jpeg", "size": 163229, "path": "Publication:Jeschke-2002-LEMA", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-LEMA/Jeschke-2002-LEMA-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-LEMA/Jeschke-2002-LEMA-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 356, 193, 357 ], "booktitle": "Proceedings of Graphics Interface 2002", "date_from": "2002-05-27", "date_to": "2002-05-29", "editor": "Wolfgang Stürzlinger and Michael McCool", "isbn": "1-56881-183-7", "lecturer": [ 356 ], "location": "Calgary, CA", "pages_from": "1", "pages_to": "8", "publisher": "AK Peters Ltd.", "research_areas": [ "Rendering" ], "keywords": [ "virtual environments", "environment maps", "impostors", "walkthroughs", "image-based rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1272, "image_height": 1272, "name": "Jeschke-2002-LEMA-image.jpg", "type": "image/jpeg", "size": 163229, "path": "Publication:Jeschke-2002-LEMA", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-LEMA/Jeschke-2002-LEMA-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-LEMA/Jeschke-2002-LEMA-image:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Jeschke-2002-LEMA/", "__class": "Publication" }, { "id": "Masterthesis-Viola", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Applications of Hardware-Accelerated Filtering in Computer Graphics", "date": "2002-04", "abstract": "Two of the most important issues of computer graphics – especially in raster graphics and volume\r\nvisualisation – are sampling and reconstruction. These operations must fulfill particular conditions\r\nof sampling theory in order to be able to represent arbitrary continuous functions by discrete samples\r\nand reconstruct them from these samples without significant information loss. Several approaches\r\nfor high-quality reconstruction have been introduced to the computer graphics community. These\r\napproaches are mostly implemented in software, possible only as pre-process step. The only two\r\nways of reconstruction that are usually fast enough for real-time rendering are nearest neighbor and\r\nlinear interpolation filtering, but the quality of these filtering processes is often not sufficient.\r\nThis work summarizes the hardware-based methods that exploit the features of today’s graphics\r\nchips for filtering tasks. These methods are divided in two parts, i.e., high-resolution filtering and\r\nimage processing. Both methods are based on the distribution principle of convolution known from\r\nsplatting based volume rendering algorithms and they share the same general principle. The difference\r\nis in the implementation of the algorithms themselves.\r\nHigh-resolution filtering employs high-order filters in order to improve the quality of resampling\r\ntremendously. The implemented algorithms exploit symmetry or separability properties to make the\r\nfiltering more efficient. We compare it to the existing, natively supported solution, i.e., linear interpolation\r\nto our filtering implementation using higher order filters. This is shown in various application\r\nareas like surface-texturing, and solid-texturing, animated textures, or derivative filtering; at interactive\r\nframerates.\r\nThe image processing algorithms are simplified general filtering algorithms to increase effciency\r\nand performance. We show the usability on smoothing and edge detection, the important operations of\r\nimage processing and pattern recognition. We combine this techniques together with other hardware\r\nfeatures to provide hardware-accelerated artistic rendering techniques. These are also presented in a\r\nrendering system that provides non-photorealistic rendering effects.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 571, "image_height": 475, "name": "Masterthesis-Viola-image.jpg", "type": "image/jpeg", "size": 38111, "path": "Publication:Masterthesis-Viola", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/Masterthesis-Viola-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/Masterthesis-Viola-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171 ], "note": "1", "supervisor": [ 166 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 571, "image_height": 475, "name": "Masterthesis-Viola-image.jpg", "type": "image/jpeg", "size": 38111, "path": "Publication:Masterthesis-Viola", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/Masterthesis-Viola-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/Masterthesis-Viola-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Masterthesis-Viola-Thesis.pdf", "type": "application/pdf", "size": 6332164, "path": "Publication:Masterthesis-Viola", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/Masterthesis-Viola-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/Masterthesis-Viola-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Masterthesis-Viola/", "__class": "Publication" }, { "id": "kanitsar-2002-CPRX", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "CPR - Curved Planar Reformation", "date": "2002-03", "abstract": "Visualization of tubular structures such as blood vessels is an\nimportant topic in medical imaging. One way to display tubular\nstructures for diagnostic purposes is to generate longitudinal\ncross-sections in order to show their lumen, wall, and surrounding\ntissue in a curved plane. This process is called Curved Planar\nReformation (CPR). We present three different methods to generate\nCPR images. A tube-phantom was scanned with Computed Tomography (CT)\nto illustrate the properties of the different CPR methods. Furthermore\nwe introduce enhancements to these methods: thick-CPR, rotating-CPR\n \t\t and multi-path-CPR.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 162, 164, 165, 189, 166 ], "number": "TR-186-2-02-06", "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-2002-CPRX-paper.pdf", "type": "application/pdf", "size": 2153735, "path": "Publication:kanitsar-2002-CPRX", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/kanitsar-2002-CPRX/kanitsar-2002-CPRX-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/kanitsar-2002-CPRX/", "__class": "Publication" }, { "id": "kanitsar-2002-Chr", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Christmas Tree Case Study: Computed Tomography as a Tool for Mastering Complex Real World Objects with Applications in Computer Graphics", "date": "2002-03", "abstract": "We report on using computed tomography (CT) as a model acquisition\ntool for complex objects in computer graphics. Unlike other modeling\nand scanning techniques the complexity of the object is irrelevant in\nCT, which naturally enables to model objects with, for example,\nconcavities, holes, twists or fine surface details. Once the data is\nscanned, one can apply post-processing techniques aimed at its further\nenhancement, modification or presentation. For demonstration purposes\nwe chose to scan a Christmas tree which exhibits high complexity which\nis difficult or even impossible to handle with other\ntechniques. However, care has to be taken to achieve good scanning\nresults with CT. Further, we illustrate the post-processing by means\nof data segmentation and photorealistic as well as non-photorealistic\n\t\t surface and volume rendering techniques.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 162, 175, 184, 170, 459, 233, 187, 188, 172, 165, 189, 164, 190, 166 ], "number": "TR-186-2-02-07", "pages_from": "1", "pages_to": "4", "research_areas": [], "keywords": [ "volume visualization", "computed tomography", "modeling" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "kanitsar-2002-Chr-paper.pdf", "type": "application/pdf", "size": 2000473, "path": "Publication:kanitsar-2002-Chr", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/kanitsar-2002-Chr/kanitsar-2002-Chr-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/kanitsar-2002-Chr/", "__class": "Publication" }, { "id": "Hey-2001-Imp", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Real-Time Rendering of Globally Illuminated Soft Glossy Scenes With Directional Light Maps", "date": "2002-03", "abstract": "Directional light maps allow to display globally illuminated static scenes with soft glossy surfaces at interactive frame-rates. They store the spatially and directionally varying incoming light at a surface in form of textures for a global set of incoming light directions. The directional light maps can be generated in a photon tracing preprocessing step. During a walkthrough they are used to render the globally illuminated surfaces with graphics hardware.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 200, 190 ], "number": "TR-186-2-02-05", "pages_from": "1", "pages_to": "6", "research_areas": [], "keywords": [ "light map", "hardware acceleration", "interactive walkthrough", "glossy surface", "global illumination", "real-time rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Hey-2001-Imp-paper.pdf", "type": "application/pdf", "size": 441836, "path": "Publication:Hey-2001-Imp", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hey-2001-Imp/Hey-2001-Imp-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hey-2001-Imp/", "__class": "Publication" }, { "id": "Artusi-2002-NRE", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "New Realistic Tone mapping Algorithm", "date": "2002-02", "abstract": "To properly reproduce a highy dynamic\nrange image on a graphic display system is a harder problem than is\ncommonly acknowledged. The last years have seen great progress in\nthis area, and for non-interactive tone mapping problems adequate\nlevels of realism have already been demonstrated, namely through the\nmultiscale model of adaptation of Pattanaik et al.. Unfortunately,\nthe high computational cost of their methods has so far precluded\ntheir use for the purposes of real-time rendering, and they have also\nbeen confined to single images without a temporal dependency.\nConversely, the work of Tumblin et al. have demonstrated time\ndependency and interactivity for tone mapping techniques, but at the\ncost of significantly reduced realism. In this report we present a\nnew high-quality time-dependent tone mapping algorithm which is\ncomparable to the work of Pattanaik et al. in terms of visual\nrealism, and demonstrate its viability on a number of test\n scenes.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191, 192 ], "number": "TR-186-2-02-03", "pages_from": "1", "pages_to": "6", "research_areas": [], "keywords": [ "Human Visual system", "Color sensitivity", "Visual acuity", "Glare", "Time-Dependency" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Artusi-2002-NRE-paper.pdf", "type": "application/pdf", "size": 406148, "path": "Publication:Artusi-2002-NRE", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Artusi-2002-NRE/Artusi-2002-NRE-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Artusi-2002-NRE/", "__class": "Publication" }, { "id": "TR-186-2-02-04", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "An Error Metric for Layered Environment Map Impostors", "date": "2002-02", "abstract": "Impostors are image-based primitives commonly used to replace complex geometry in order to accelerate the\nrendering of large virtual environments. This paper describes\na “layered impostor technique” used for representing distant scene-parts when seen from a bounded viewing region. A special layer placement is derived\nwhich bounds the geometric error introduced by parallaxes to a defined value. In combination with a special\ntechnique for image generation, a high-quality impostor representation without image artifacts can be obtained.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 819, "image_height": 318, "name": "TR-186-2-02-04-image.jpg", "type": "image/jpeg", "size": 83442, "path": "Publication:TR-186-2-02-04", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/TR-186-2-02-04-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/TR-186-2-02-04-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 356, 193 ], "number": "TR-186-2-02-04", "research_areas": [ "Rendering" ], "keywords": [ "impostors, real-time rendering, virtual" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 819, "image_height": 318, "name": "TR-186-2-02-04-image.jpg", "type": "image/jpeg", "size": 83442, "path": "Publication:TR-186-2-02-04", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/TR-186-2-02-04-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/TR-186-2-02-04-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Technical report", "main_file": true, "use_in_gallery": false, "access": "public", "name": "TR-186-2-02-04-Technical report.pdf", "type": "application/pdf", "size": 400627, "path": "Publication:TR-186-2-02-04", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/TR-186-2-02-04-Technical report.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/TR-186-2-02-04-Technical report:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/TR-186-2-02-04/", "__class": "Publication" }, { "id": "Artusi-2002-NRT", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "New Real-Time Tone mapping Algorithm", "date": "2002-01", "abstract": "The conversion from real-world to\ndisplay luminance is known as tone-mapping, and the goals of the\nso-called tone mapping operator are to reproduce visibility and the\noverall impression of brightness, contrast and color. To truly\nrealize this means to employ a very complex algorithm that exactly\nsimulates how the human visual system is working. Due to its\ncomplexity, such a simulation cannot be used inside a real-time\napplication. This means that realistic tone mapping models so far\ncould not be used in interactive rendering applications, and that one\nhad to resort to simpler, less convincing techniques in this case. We\ndemostrate a new approach with which it is finally possible to use a\n realistic tone mapping model in a real time.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191, 192 ], "number": "TR-186-2-02-02", "pages_from": "1", "pages_to": "5", "research_areas": [], "keywords": [ "Texture Mapping", "Rendering Systems", "Reflectance & Shading Models", "Image-Based Rendering", "Graphics Systems", "Computer Vision", "Color" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Artusi-2002-NRT-paper.pdf", "type": "application/pdf", "size": 367637, "path": "Publication:Artusi-2002-NRT", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Artusi-2002-NRT/Artusi-2002-NRT-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Artusi-2002-NRT/", "__class": "Publication" }, { "id": "Hauser-2002-SSI", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Smart surface interrogation for advanced visualization techniques", "date": "2002-01", "abstract": "Highly elaborated visualization techniques that are\nbased on surfaces often are independent from the\norigin of the surface data. Nevertheless, most of the\nrecently presented advanced visualization methods\nwere developed for a specific type of surface\nalthough principally applicable to generic\nsurfaces. In this paper we discuss a unified surface\ninterrogation model which provides generic access to\nsurface properties up to degree two, i.e., surface\npoint locations, normals, and curvature properties,\n(almost) regardless of the origin of the\nsurface. Surface types and interrogation algorithms\nare compared and summarized. At the end of this paper\nwe present an object-oriented implementation of this\n\t\t model, called SMURF.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 176, 175, 197, 166 ], "number": "TR-186-2-02-01", "pages_from": "1", "pages_to": "10", "research_areas": [], "keywords": [ "surface properties", "surfaces", "visualization" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Hauser-2002-SSI-paper.pdf", "type": "application/pdf", "size": 765074, "path": "Publication:Hauser-2002-SSI", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hauser-2002-SSI/Hauser-2002-SSI-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Hauser-2002-SSI/", "__class": "Publication" }, { "id": "Dorfmueller-Ulhaas-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Optical Tracking - From User Motion To 3D Interaction", "date": "2002", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 201 ], "date_end": "2002-12", "date_start": "2000-10", "supervisor": [ 190, 202 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Dorfmueller-Ulhaas-thesis-pdf.pdf", "type": "application/pdf", "size": 7602301, "path": "Publication:Dorfmueller-Ulhaas-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Dorfmueller-Ulhaas-thesis/Dorfmueller-Ulhaas-thesis-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/Dorfmueller-Ulhaas-thesis/Dorfmueller-Ulhaas-thesis-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Dorfmueller-Ulhaas-thesis/", "__class": "Publication" }, { "id": "Bartroli-2002-Pro", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Projected Slabs: Approximation of Perspective projection and Error Analysis", "date": "2002", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 459, 165, 166 ], "journal": "Journal of Visualization and Computer Animation", "number": "5", "pages_from": "253", "pages_to": "262", "volume": "12", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/Bartroli-2002-Pro/", "__class": "Publication" }, { "id": "xmas-2002", "type_id": "xmascard", "tu_id": null, "repositum_id": null, "title": "X-Mas 2002", "date": "2002", "abstract": "Der Blick auf Wien wurde Hartmann Schedels Weltchronik (1493) entnommen.\r\n\r\nDas Motiv \"Die Könige folgen dem Stern\" findet sich im Atlas Catalan der Bibliothèque Nationale de France (14. Jahrhundert). Es wurde für die Karte etwas überarbeitet.\r\n\r\nDie drei Buchstaben stehen für die Initialen der Magoi (gr.: Meister).\r\n\r\nDer Himmel basiert auf einem Screenshot von VRMoSS, dem Virtual Reality Model of the Solar System, entwickelt für das EU-Projekt \"ASH\" (http://www.ashproject.org, jetzt http://www.virtualcontrolroom.org). Es stellt den Blick auf den abendlichen Westhimmel im November des Jahres 7 v.u.Z. dar, an dem eine Konjunktion von Jupiter (Königsstern der chaldäischen Astrologie) und Saturn (Stern der Juden) vor dem Hintergrund der Fische (der Region Palästina zugeordnet) sichtbar war. Dieses Ereignis ist eine der besten natürlichen Erklärungen für den Biblischen \"Stern der Weisen\". Die Planeten sind stark vergrößert dargestellt. Der Lichtkegel des Zodiakallichts (an interplanetarem Staub gestreutes Sonnenlicht) wurde während der Nachbearbeitung eingefügt.\r\n\r\nDas Gesamtbild wurde mit GIMP, dem freien GNU Image Manipulation Programm, erstellt. \r\n\r\nIdee, Materialien: Attila Neumann, Georg Zotti, Alexander Wilkie und andere.\r\nVRMoSS, Ausführung: Georg Zotti (2002) \r\n\r\n\r\nThe lower part of the image is a woodcut of Vienna taken from Hartmann Schedel's Chronicle Of The World (1493).\r\n\r\nThe image \"The Kings Follow the Star\" was taken from the Atlas Catalan, Bibliothèque Nationale de France (14th Century) and slightly modified. According to central European tradition, one of the kings was a Moor.\r\n\r\nThe three letters represent the initials of the Magi (gr.: Master).\r\n\r\nThe sky image is a screenshot from VRMoSS (Virtual Reality Model of the Solar System), developed at our institute for the EU project \"ASH\" (http://www.ashproject.org, now http://www.virtualcontrolroom.org). It represents the evening sky of mid-November of the year 7 B.C.E., showing the close conjunction of Jupiter (star of the kings in Chaldean astrology) and Saturn (star of the Jews) - both greatly enlarged - in the constellation of Pisces (the fishes; related to Palestine), which is one of the best natural explanations of the biblical story of the star followed by the magi (\"wise men\" or \"kings\"). The light cone of the Zodiacal Light (sunlight reflected by dust in the Solar System) has been added during the postprocessing.\r\n\r\nThe image has been composed with GIMP, the free GNU Image Manipulation Program.\r\n\r\nIdea, material: Attila Neumann, Georg Zotti, Alexander Wilkie, and others.\r\nVRMoSS, artwork: Georg Zotti (2002) ", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1280, "image_height": 995, "name": "xmas-2002-image.tif", "type": "image/tiff", "size": 2032078, "path": "Publication:xmas-2002", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/xmas-2002/xmas-2002-image.tif", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/xmas-2002/xmas-2002-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222, 232, 192 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1280, "image_height": 995, "name": "xmas-2002-image.tif", "type": "image/tiff", "size": 2032078, "path": "Publication:xmas-2002", "url": "https://www.cg.tuwien.ac.at/research/publications/2002/xmas-2002/xmas-2002-image.tif", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2002/xmas-2002/xmas-2002-image:thumb{{size}}.png" } ], "projects_workgroups": [ "xmas" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2002/xmas-2002/", "__class": "Publication" }, { "id": "Buehler-2002-Fas", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Fast and Reliable Plotting of Implicit Curves", "date": "2002", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, 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