[ { "id": "LEHNINGER-2007-SSV", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Simulation von städtischem Verkehr", "date": "2007-04", "abstract": "The task of this thesis is the simulation of urban traffic.\r\n\r\nFor this purpose the traffic library TrafLib was developed. TrafLib is a multi-agent, micro simulation for urban traffic. It is suitable for visualisation, e.g. urban visualisation software, driving simulators, computer games, virtual reality software, and so on. It enhances them and makes them more attractive.\r\n\r\nTrafLib requires a road-network in the form of an input file. The input file must contain the description of roads and crossings, and optionally traffic lights and traffic signs. Additionally to the own file description format, the format of VRMG is also supported. VRMG is a program for creating geometry of large road-networks.\r\n\r\nThe problem of traffic calculation is solved by handling traffic rules according to the Highway Code and the “Car-Following-Theory”. The vehicles are modelled as autonomous agents. Human characteristics are imitated by three different types of driving-behaviour (cautious, normal, aggressive).\r\n\r\nThe movement of the vehicles takes place on 1-dimensional lanes. This reduces the flexibility a little, but simplifies the calculation a lot.\r\n\r\nTrafLib is able to simulate more than 5000 vehicles on a road network of the size of 3 times 3 km in real-time on a standard-PC.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 684 ], "supervisor": [ 193 ], "research_areas": [], "keywords": [ "traffic simulation", "real-time rendering" ], "weblinks": [], "files": [ { "description": "", "filetitle": "thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "LEHNINGER-2007-SSV-thesis.pdf", "type": "application/pdf", "size": 1537458, "path": "Publication:LEHNINGER-2007-SSV", "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LEHNINGER-2007-SSV/LEHNINGER-2007-SSV-thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2007/LEHNINGER-2007-SSV/LEHNINGER-2007-SSV-thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2007/LEHNINGER-2007-SSV/", "__class": "Publication" }, { "id": "bittner-2005-egsr", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Fast Exact From-Region Visibility in Urban Scenes", "date": "2005-06", "abstract": "We present a fast exact from-region visibility algorithm for 2.5D\nurban scenes. The algorithm uses a hierarchical subdivision of\nline-space for identifying visibility interactions in a 2D\nfootprint of the scene. Visibility in the remaining vertical\ndimension is resolved by testing for the existence of lines\nstabbing sequences of virtual portals. Our results show that exact\nanalytic from-region visibility in urban scenes can be computed at\ntimes comparable or even superior to recent conservative methods. ", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1179, "image_height": 962, "name": "bittner-2005-egsr-image.jpg", "type": "image/jpeg", "size": 44941, "path": "Publication:bittner-2005-egsr", "url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/bittner-2005-egsr-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/bittner-2005-egsr-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 198, 194, 193 ], "booktitle": "Rendering Techniques 2005 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2005-06-29", "date_to": "2005-07-01", "editor": "Kavita Bala and Philip Dutré", "isbn": "3-905673-23-1", "lecturer": [ 198 ], "location": "Konstanz, Germany", "organization": "Eurographics", "pages_from": "223", "pages_to": "230", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "real-time rendering", "visibility" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1179, "image_height": 962, "name": "bittner-2005-egsr-image.jpg", "type": "image/jpeg", "size": 44941, "path": "Publication:bittner-2005-egsr", "url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/bittner-2005-egsr-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/bittner-2005-egsr-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "bittner-2005-egsr-Paper.pdf", "type": "application/pdf", "size": 3449376, "path": "Publication:bittner-2005-egsr", "url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/bittner-2005-egsr-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/bittner-2005-egsr-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz", "GameTools" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2005/bittner-2005-egsr/", "__class": "Publication" }, { "id": "Bittner-2004-CHC", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Coherent Hierarchical Culling: Hardware Occlusion Queries Made Useful", "date": "2004-09", "abstract": "We present a simple but powerful algorithm for optimizing the usage of hardware occlusion queries in arbitrary complex scenes. Our method minimizes the number of issued queries and reduces the delays due to the latency of query results. We reuse the results of the occlusion queries from the last frame in order to initiate and schedule the queries in the next frame. This is done by processing nodes of a spatial hierarchy in front-to-back order, interleaving occlusion queries with the rendering of certain previously visible nodes. The proposed scheduling of the queries makes use of spatial and temporal coherence of visibility. Despite its simplicity, the algorithm achieves good culling efficiency for scenes of various characteristics. The implementation of the algorithm is straightforward, and it can be easily integrated in existing real-time rendering packages using various spatial data structures.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 160, "image_height": 96, "name": "Bittner-2004-CHC-image.jpg", "type": "image/jpeg", "size": 7299, "path": "Publication:Bittner-2004-CHC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/Bittner-2004-CHC-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/Bittner-2004-CHC-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 198, 193, 451, 190 ], "date_from": "2004-08-30", "date_to": "2004-09-03", "event": "EUROGRAPHICS 2004", "issn": "0167-7055", "journal": "Computer Graphics Forum", "lecturer": [ 193 ], "location": "Grenoble, France", "note": "Proceedings EUROGRAPHICS 2004", "number": "3", "pages_from": "615", "pages_to": "624", "volume": "23", "research_areas": [ "Rendering" ], "keywords": [ "occlusion query", "visibility", "real-time rendering", "occlusion culling" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 160, "image_height": 96, "name": "Bittner-2004-CHC-image.jpg", "type": "image/jpeg", "size": 7299, "path": "Publication:Bittner-2004-CHC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/Bittner-2004-CHC-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/Bittner-2004-CHC-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Bittner-2004-CHC-Paper.pdf", "type": "application/pdf", "size": 1105728, "path": "Publication:Bittner-2004-CHC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/Bittner-2004-CHC-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/Bittner-2004-CHC-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Bittner-2004-CHC/", "__class": "Publication" }, { "id": "Wimmer-2004-LSPM", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Light Space Perspective Shadow Maps", "date": "2004-06", "abstract": "In this paper, we present a new shadow mapping technique that improves the quality of perspective and uniform shadow maps. Our technique uses a perspective transform specified in light space which allows treating all lights as directional lights and does not change the direction of the light sources. This gives all the benefits of the perspective mapping but avoids the problems inherent in perspective shadow mapping like singularities in post-perspective space, missed shadow casters etc. Furthermore, we show that both uniform and perspective shadow maps distribute the perspective aliasing error that occurs in shadow mapping unequally over the available z-range. We therefore propose a transform that equalizes this error and gives equally pleasing results for near and far viewing distances. Our method is simple to implement, requires no scene analysis and is therefore as fast as uniform shadow mapping.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 928, "image_height": 464, "name": "Wimmer-2004-LSPM-image.jpg", "type": "image/jpeg", "size": 82022, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193, 452, 190 ], "booktitle": "Rendering Techniques 2004 (Proceedings Eurographics Symposium on Rendering)", "date_from": "2004-06-21", "date_to": "2004-06-23", "editor": "Alexander Keller and Henrik W. Jensen", "isbn": "3-905673-12-6", "lecturer": [ 193 ], "location": "Norrköping, Sweden", "organization": "Eurographics", "pages_from": "143", "pages_to": "151", "publisher": "Eurographics Association", "research_areas": [ "Rendering" ], "keywords": [ "shadows", "real-time rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 928, "image_height": 464, "name": "Wimmer-2004-LSPM-image.jpg", "type": "image/jpeg", "size": 82022, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image2", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image2.png", "type": "image/png", "size": 1431490, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image2.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image2:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image3", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image3.png", "type": "image/png", "size": 1980010, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image3.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image3:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image4", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image4.png", "type": "image/png", "size": 1483549, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image4.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image4:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image5", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image5.png", "type": "image/png", "size": 686732, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image5.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image5:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image6", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image6.png", "type": "image/png", "size": 2590946, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image6.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image6:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image7", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image7.png", "type": "image/png", "size": 1193897, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image7.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image7:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image8", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image8.png", "type": "image/png", "size": 3005053, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image8.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image8:thumb{{size}}.png" }, { "description": "A scene shadowed with Light Space Perspective Shadow Maps.", "filetitle": "image9", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2048, "image_height": 1480, "name": "Wimmer-2004-LSPM-image9.png", "type": "image/png", "size": 3173467, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image9.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-image9:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wimmer-2004-LSPM-Paper.pdf", "type": "application/pdf", "size": 3297954, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-Paper:thumb{{size}}.png" }, { "description": null, "filetitle": "Revised version", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Wimmer-2004-LSPM-Revised version.pdf", "type": "application/pdf", "size": 3328886, "path": "Publication:Wimmer-2004-LSPM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-Revised version.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/Wimmer-2004-LSPM-Revised version:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wimmer-2004-LSPM/", "__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": "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": "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": "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": "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": "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": "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": "Bittner-2001-Vis", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Visibility Preprocessing for Urban Scenes using Line Space Subdivision", "date": "2001-10", "abstract": "We present an algorithm for visibility preprocessing of urban environments. The algorithm uses a subdivision of line space to analytically calculate a conservative potentially visible set for a given region in the scene. We present a detailed evaluation of our method including a comparison to another recently published visibility preprocessing algorithm. To the best of our knowledge the proposed method is the first algorithm that scales to large scenes and efficiently handles large view cells.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1276, "image_height": 948, "name": "Bittner-2001-Vis-image.jpg", "type": "image/jpeg", "size": 262662, "path": "Publication:Bittner-2001-Vis", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/Bittner-2001-Vis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/Bittner-2001-Vis-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 198, 194, 193 ], "booktitle": "Proceedings of Pacific Graphics 2001 (Ninth Pacific Conference on Computer Graphics and Applications)", "editor": "Bob Werner", "isbn": "0-7695-1227-5", "lecturer": [ 198 ], "location": "Tokyo, Japan", "pages_from": "276", "pages_to": "284", "publisher": "IEEE Computer Society Press", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1276, "image_height": 948, "name": "Bittner-2001-Vis-image.jpg", "type": "image/jpeg", "size": 262662, "path": "Publication:Bittner-2001-Vis", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/Bittner-2001-Vis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/Bittner-2001-Vis-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Bittner-2001-Vis-Paper.pdf", "type": "application/pdf", "size": 2616610, "path": "Publication:Bittner-2001-Vis", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/Bittner-2001-Vis-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/Bittner-2001-Vis-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-Vis/", "__class": "Publication" }, { "id": "Wonka-2001-Ins", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Instant Visibility", "date": "2001-09", "abstract": "We present an online occlusion culling system which computes visibility in parallel to the rendering pipeline. We show how to use point visibility algorithms to quickly calculate a tight potentially visible set (PVS) which is valid for several frames, by shrinking the occluders used in visibility calculations by an adequate amount. These visibility calculations can be performed on a visibility server, possibly a distinct computer communicating with the display host over a local network. The resulting system essentially combines the advantages of online visibility processing and region-based visibility calculations, allowing asynchronous processing of visibility and display operations. We analyze two different types of hardware-based point visibility algorithms and address the problem of bounded calculation time which is the basis for true real-time behavior. Our results show reliable, sustained 60 Hz performance in a walkthrough with an urban environment of nearly 2 million polygons, and a terrain flyover.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 150, "image_height": 100, "name": "Wonka-2001-Ins-image.jpg", "type": "image/jpeg", "size": 3588, "path": "Publication:Wonka-2001-Ins", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/Wonka-2001-Ins-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/Wonka-2001-Ins-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 194, 193, 195 ], "date_from": "2001-09-05", "date_to": "2001-09-07", "event": "EUROGRAPHICS 2001", "issn": "0167-7055", "journal": "Computer Graphics Forum", "lecturer": [ 194, 193 ], "location": "Manchester, UK", "note": "Günther Enderle [Best Paper] Award, Best Student Paper Award. A. Chalmers and T.-M. Rhyne (eds.), Proceedings EUROGRAPHICS 2001", "number": "3", "pages_from": "411", "pages_to": "421", "volume": "20", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 150, "image_height": 100, "name": "Wonka-2001-Ins-image.jpg", "type": "image/jpeg", "size": 3588, "path": "Publication:Wonka-2001-Ins", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/Wonka-2001-Ins-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/Wonka-2001-Ins-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wonka-2001-Ins-Paper.pdf", "type": "application/pdf", "size": 1606737, "path": "Publication:Wonka-2001-Ins", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/Wonka-2001-Ins-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/Wonka-2001-Ins-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wonka-2001-Ins/", "__class": "Publication" }, { "id": "Wimmer-2001-Poi", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Point-Based Impostors for Real-Time Visualization", "date": "2001-06", "abstract": "We present a new data structure for encoding the appearance of a geometric model as seen from a viewing region (view cell). This representation can be used in interactive or real-time visualization applications to replace a complex model by an impostor, maintaining high quality rendering while cutting down rendering time. Our approach relies on an object-space sampled representation similar to a point cloud or a layered depth image, but introduces two fundamental additions to previous techniques. First, the sampling rate is controlled to provide sufficient density across all possible viewing conditions from the specified view cell. Second, a correct, antialiased representation of the plenoptic function is computed using Monte Carlo integration. Our system therefore achieves high quality rendering using a simple representation with bounded complexity. We demonstrate the method for an application in urban visualization.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 250, "image_height": 155, "name": "Wimmer-2001-Poi-image.jpg", "type": "image/jpeg", "size": 12891, "path": "Publication:Wimmer-2001-Poi", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/Wimmer-2001-Poi-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/Wimmer-2001-Poi-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193, 194, 195 ], "booktitle": "Rendering Techniques 2001 (Proceedings Eurographics Workshop on Rendering)", "editor": "Steven J. Gortler and Karol Myszkowski", "isbn": "3-211-83709-4", "lecturer": [ 193 ], "organization": "Eurographics", "pages_from": "163", "pages_to": "176", "publisher": "Springer-Verlag", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 250, "image_height": 155, "name": "Wimmer-2001-Poi-image.jpg", "type": "image/jpeg", "size": 12891, "path": "Publication:Wimmer-2001-Poi", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/Wimmer-2001-Poi-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/Wimmer-2001-Poi-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wimmer-2001-Poi-Paper.pdf", "type": "application/pdf", "size": 2348210, "path": "Publication:Wimmer-2001-Poi", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/Wimmer-2001-Poi-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/Wimmer-2001-Poi-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Wimmer-2001-Poi/", "__class": "Publication" }, { "id": "HUMMEL-2001-MSE", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Modellierung von Straßen für Echtzeitvisualisierung", "date": "2001", "abstract": "Diese Diplomarbeit ist die theoretische Abhandlung von VRMG, einem Softwareprojekt, das im\nRahmen des praktischen Teiles der Arbeit realisiert wurde und die Modellierung von Terrain und\nStraßen virtueller Städte zum Zwecke der Echzeit-Visualisierung bewerkstelligt. Ausgehend von\nden Vermessungsdaten in Form von geografischen Höhenwerten und dem Straßennetz, das als\nStraßengraph vorliegt, werden alle Schritte zur Umsetzung dieser Rohdaten in Geometriedaten für\ndie separate Modellerstellung des Terrains und der Straßenzüge behandelt. Der Schwerpunkt der\nArbeit liegt auf dem Anwendungsfall – Stadtstraßen. Somit umfaßt VRMG zahlreiche Elemente\nfür den Aufbau von Straßen, wie sie typischerweise im Stadtbereich zu finden sind. Dadurch ist es\nmöglich, zahlreiche Straßen-Konfigurationen aus der Realität nachzubilden. Das Terrain wird als\nkonventioneller, Regulärer-Raster erfaßt. Nach der Berechnung der Straßen- bzw.\nHöhenfeldgeometrie, die auf Grundlage von Beschreibungsfiles zur Eingabe der spezifischen\nParameter erfolgt, liegt das Ergebnis dieses Schrittes in polygonaler Repräsentationsform vor.\nDadurch, daß die Modell-Geometrie vorzugsweise für Echtzeitanwendungen eingesetzt wird, ist\ndie Aufbereitung der polygonalen Repräsentation durch Nachfolgeoperationen zur Optimierung\nder Geometrie bedeutsam. Durch die Verfahren der Delaunay-Triangulierung und des Triangle-\nStripping werden die Polygone mittels Dreieckszerlegung tesseliert und dadurch in eine Form\ngebracht, die die derzeitigen 3D-Hardwarebeschleunigerchips unterstützen. Das endgültige\nResultat wird als Szenegraph, der als Baumstruktur die Geometrie- und Texturierungdaten in\nhierarchischer Form aufnimmt, gespeichert und für die Verwendung, etwa als\nSimulationsumgebung, zur Verfügung gestellt.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 641 ], "date_end": "2001", "date_start": "2000", "matrikelnr": "0000000", "supervisor": [ 194 ], "research_areas": [ "Modeling" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "HUMMEL-2001-MSE-Thesis.pdf", "type": "application/pdf", "size": 1580567, "path": "Publication:HUMMEL-2001-MSE", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/HUMMEL-2001-MSE/HUMMEL-2001-MSE-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/HUMMEL-2001-MSE/HUMMEL-2001-MSE-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/HUMMEL-2001-MSE/", "__class": "Publication" }, { "id": "wonka-2000-VisP", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Visibility Preprocessing with Occluder Fusion for Urban Walkthroughs", "date": "2000-06", "abstract": "This paper presents an efficient algorithm for occlusion culling of urban environments. It is conservative and accurate in finding all significant occlusion. It discretizes the scene into view cells, for which cell-to-object visibility is precomputed, making on-line overhead negligible. Unlike other precomputation methods for view cells, it is able to conservatively compute all forms of occluder interaction for an arbitrary number of occluders. To speed up preprocessing, standard graphics hardware is exploited and occluder occlusion is considered. A walkthrough application running an 8 million polygon model of the city of Vienna on consumer-level hardware illustrates our results.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 780, "image_height": 390, "name": "wonka-2000-VisP-image.jpg", "type": "image/jpeg", "size": 97349, "path": "Publication:wonka-2000-VisP", "url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/wonka-2000-VisP-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/wonka-2000-VisP-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 194, 193, 202 ], "booktitle": "Rendering Techniques 2000 (Proceedings Eurographics Workshop on Rendering)", "editor": "Bernard Péroche and Holly Rushmeier", "isbn": "3-211-83535-0", "lecturer": [ 194, 193 ], "location": "held in Brno, Czech Republic, June 26-28, 2000", "organization": "Eurographics", "pages_from": "71", "pages_to": "82", "publisher": "Springer-Verlag Wien New York", "research_areas": [ "Rendering" ], "keywords": [ "Visibility determination", "image-based rendering.", "occluder occlusion", "occluder fusion", "urban environments", "walkthrough", "real-time graphics", "shadow algorithms", "occlusion culling" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 780, "image_height": 390, "name": "wonka-2000-VisP-image.jpg", "type": "image/jpeg", "size": 97349, "path": "Publication:wonka-2000-VisP", "url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/wonka-2000-VisP-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/wonka-2000-VisP-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "wonka-2000-VisP-Paper.pdf", "type": "application/pdf", "size": 1164825, "path": "Publication:wonka-2000-VisP", "url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/wonka-2000-VisP-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/wonka-2000-VisP-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/wonka-2000-VisP/", "__class": "Publication" }, { "id": "Wimmer-1999-FWIb", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Fast Walkthroughs with Image Caches and Ray Casting", "date": "1999-12", "abstract": "We present an output-sensitive rendering algorithm for accelerating walkthroughs of large, densely occluded virtual environments using a multi-stage Image Based Rendering Pipeline. In the first stage, objects within a certain distance are rendered using the traditional graphics pipeline, whereas the remaining scene is rendered by a pixel-based approach using an Image Cache, horizon estimation to avoid calculating sky pixels, and finally, ray casting. The time complexity of this approach does not depend on the total number of primitives in the scene. We have measured speedups of up to one oder of magnitude.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193, 402, 202 ], "issn": "0097-8493", "journal": "Computers and Graphics", "number": "6", "pages_from": "831", "pages_to": "838", "volume": "23", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIb/", "__class": "Publication" }, { "id": "Wimmer-1999-FWIa", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Fast Walkthroughs with Image Caches and Ray Casting", "date": "1999-06", "abstract": "We present an output-sensitive rendering algorithm for accelerating walkthroughs of large, densely occluded virtual environments using a multi-stage Image Based Rendering Pipeline. In the first stage, objects within a certain distance are rendered using the traditional graphics pipeline, whereas the remaining scene is rendered by a pixel-based approach using an Image Cache, horizon estimation to avoid calculating sky pixels, and finally, ray casting. The time complexity of this approach does not depend on the total number of primitives in the scene. We have measured speedups of up to one oder of magnitude.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 774, "image_height": 580, "name": "Wimmer-1999-FWIa-image.jpg", "type": "image/jpeg", "size": 101454, "path": "Publication:Wimmer-1999-FWIa", "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIa/Wimmer-1999-FWIa-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIa/Wimmer-1999-FWIa-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 193, 402, 202 ], "booktitle": "Virtual Environments '99. Proceedings of the 5th Eurographics Workshop on Virtual Environments", "editor": "Michael Gervautz and Dieter Schmalstieg and Axel Hildebrand", "isbn": "3-211-83347-1", "lecturer": [ 193 ], "organization": "Eurographics", "pages_from": "73", "pages_to": "84", "publisher": "Springer-Verlag Wien", "research_areas": [ "Rendering" ], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 774, "image_height": 580, "name": "Wimmer-1999-FWIa-image.jpg", "type": "image/jpeg", "size": 101454, "path": "Publication:Wimmer-1999-FWIa", "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIa/Wimmer-1999-FWIa-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIa/Wimmer-1999-FWIa-image:thumb{{size}}.png" } ], "projects_workgroups": [ "UrbanViz" ], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Wimmer-1999-FWIa/", "__class": "Publication" } ]