[ { "id": "Bittner-2003-Exa", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Exact Regional Visibility Using Line-Space Partitioning", "date": "2003", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 198, 199, 266 ], "journal": "Computers & Graphics", "number": "4", "pages_from": "569", "pages_to": "580", "volume": "27", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2003/Bittner-2003-Exa/", "__class": "Publication" }, { "id": "Bittner-2001-ERV", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Exact Regional Visibility using Line Space Partitioning", "date": "2001-03", "abstract": "We present a new technique for exact and output sensitive\ndetermination of visibility from a polygonal region in the plane. It\nuses hierarchical partitioning of line space, that provides\ncomprehensive description of visibility for a set of occluders.\nTo the best of our knowledge, it is the first exact regional\nvisibility algorithm suitable for visibility preprocessing of large\nscenes of unspecific type. We have evaluated the implementation on\n scenes with various visibility characteristics.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 198, 199 ], "number": "TR-186-2-01-06", "pages_from": "1", "pages_to": "13", "research_areas": [], "keywords": [ "projective geometry", "Plücker coordinates", "kD--tree", "BSP--tree", "line--space", "visibility" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Bittner-2001-ERV-paper.gz", "type": "application/octet-stream", "size": 817662, "path": "Publication:Bittner-2001-ERV", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-ERV/Bittner-2001-ERV-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Bittner-2001-ERV/", "__class": "Publication" }, { "id": "Prikryl-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Perceptually Driven Radiosity", "date": "2001", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 199 ], "date_end": "2001-06", "date_start": "1997-06", "supervisor": [ 190 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Prikryl-thesis-pdf.pdf", "type": "application/pdf", "size": 2061518, "path": "Publication:Prikryl-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Prikryl-thesis/Prikryl-thesis-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2001/Prikryl-thesis/Prikryl-thesis-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2001/Prikryl-thesis/", "__class": "Publication" }, { "id": "Havran-2000-SCR", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Statistical Comparison of Ray-Shooting Efficiency Schemes", "date": "2000-05", "abstract": "In this report we present an experimental efficiency\nstudy of spatial subdivision schemes for ray-shooting\nacceleration. Presented results are part of our\neffort to find the long-discussed best efficiency\nscheme from the statistical point of view. We propose\nfour testing procedures evaluating the ray-shooting\nalgorithm properties. We use these methods to\nproduce hardware independent statistics for different\nray-shooting acceleration schemes that have been\nreimplemented following the published literature. We\ndefine the the minimal set of parameters to be\nreported as well as scene invariants, parameters that\nstay the same regardless of the acceleration scheme\nused. The main results of first 1440 measurements\nfor 30 scenes from the SPD database and 12\nacceleration methods are reported. We also attempt to\noutline a method that suggests the most suitable\nacceleration scheme based on the scene complexity\n analysis of a given scene.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 203, 199, 190 ], "number": "TR-186-2-00-14", "pages_from": "1", "pages_to": "13", "research_areas": [], "keywords": [ "ray-tracing", "best efficiency scheme", "acceleration schemes", "spatial subdivision", "ray-shooting" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Havran-2000-SCR-paper.gz", "type": "application/octet-stream", "size": 216887, "path": "Publication:Havran-2000-SCR", "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Havran-2000-SCR/Havran-2000-SCR-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Havran-2000-SCR/", "__class": "Publication" }, { "id": "Prikryl-2000-Imp", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Importance-Driven Hierarchical Stochastic Ray Radiosity", "date": "2000", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190, 199, 389 ], "note": "In Proceedings of the 8th International Conference in Central Europe on Computer Graphics, Visualization and Interactive Digital Media'2000 (ed. V. Skala), vol.short comm. pp. 100-106, University of West Bohemia, Czech Republic, February 2000", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2000/Prikryl-2000-Imp/", "__class": "Publication" }, { "id": "Hladuvka-2000-CTF", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Overview of Perceptually-Driven Radiosity Methods", "date": "1999-12", "abstract": "Despite its popularity among researchers the radiosity\nmethod still suffers of some disadvantages over other\nglobal illumination methods. Besides the fact that the\noriginal method allows only for solving the global\nillumination of environments consisting of purely\ndiffuse surfaces, the method is rather computationally\ndemanding. In the search for possible speed-up\ntechniques one of the possibilities is to take also the\ncharacteristic features of the human visual\nsystem. Being aware of how the human visual perception\nworks, one may compute the radiosity solution to lower\naccuracy in terms of physically based error metrics, but\nbeing sure that the physically correct solution won't\nbring any improvements in the image for the human\nobserver. In the following report we briefly summarize\nachievements in the radiosity research in the past years\nand present the state of the art in perceptual\napproaches used in computer graphics nowadays. We will\ngive an overview of known tone-mapping and\nperceptually-based image comparison techniques that can\nbe used in the scope of the radiosity method to further\nspeed up the computational process. In the second part\nof the report we concentrate on known radiosity methods\nthat already use these perceptual approaches to predict\ndifferent visible errors of the result of the radiosity\ncomputation. We will not speak about importance-driven\nradiosity solutions, as those methods are based on using\ngeometric visibility rather than on using human\n perception-aware techniques.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 199, 190 ], "number": "TR-186-2-99-26", "pages_from": "1", "pages_to": "17", "research_areas": [], "keywords": [ "perception", "image difference", "tone-mapping", "radiosity" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Hladuvka-2000-CTF-paper.gz", "type": "application/octet-stream", "size": 132262, "path": "Publication:Hladuvka-2000-CTF", "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Hladuvka-2000-CTF/Hladuvka-2000-CTF-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Hladuvka-2000-CTF/", "__class": "Publication" }, { "id": "Prikryl-1999-PDT", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Importance-Driven Hierarchical Stochastic Ray Radiosity", "date": "1999-10", "abstract": "We present a hierarchical Monte-Carlo radiosity\nalgorithm driven by the view importance. Using this\nquantity it is possible to concentrate the\ncomputational effort on solution in the immediate\nenvironment of the observer, trading the low\nsolution quality in invisible areas for better\nquality in areas that are visible for the\nobserver. This is achieved by modifying the sampling\nprobabilities of scene elements so that more samples\nare concentrated in the area of high importance and\nby extending the subdivision oracle function so that\nthe subdivision is coarser in areas of low\n importance.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 199, 389, 190 ], "number": "TR-186-2-99-22", "pages_from": "1", "pages_to": "7", "research_areas": [], "keywords": [ "view potential", "view importance", "hierarchical refinement", "hierarchy", "radiosity", "Monte-Carlo" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Prikryl-1999-PDT-paper.gz", "type": "application/octet-stream", "size": 365279, "path": "Publication:Prikryl-1999-PDT", "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Prikryl-1999-PDT/Prikryl-1999-PDT-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Prikryl-1999-PDT/", "__class": "Publication" }, { "id": "Prikryl-1999-PDTX", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Perceptually-Driven Termination for Stochastic\n Radiosity", "date": "1999-01", "abstract": "This technical report presents a heuristic\nperceptually-based termination criterion for a\nstochastic radiosity algorithms. The proposed\ncriterion makes it possible to terminate the\niterative radiosity simulation as soon as any\nfurther changes of the radiosity solution are\npredicted not to be noticed by the human\nobserver. We use tone mapping operators and\nperceptually uniform CIE L*u*v* colour space to\narrive at the difference of displayed values. In\norder to decide when to stop the iterations of the\nradiosity method, we evaluate the least squares fit\n of a power function to the error distribution data.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 199, 190 ], "number": "TR-186-2-99-01", "pages_from": "1", "pages_to": "9", "research_areas": [], "keywords": [ "termination prediction", "radiosity", "human perception" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Prikryl-1999-PDTX-paper.gz", "type": "application/octet-stream", "size": 283240, "path": "Publication:Prikryl-1999-PDTX", "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Prikryl-1999-PDTX/Prikryl-1999-PDTX-paper.gz", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Prikryl-1999-PDTX/", "__class": "Publication" }, { "id": "Prikryl-1999-Per", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "Perceptually Driven Termination for Stochastic Radiosity.", "date": "1999", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190, 199 ], "note": "Proceedings of WSCG´99, pp. 418-425, Univ.of Plzen, 1999.", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1999/Prikryl-1999-Per/", "__class": "Publication" }, { "id": "Neumann-1998-The", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "The Constant Radiance Term", "date": "1998", "abstract": null, "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 177, 190, 199, 232 ], "note": "In Machine, Graphics and Vision, No. 7(3), pp.535-549, Polish Academy of Sciences, Warsaw, 1998.", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/1998/Neumann-1998-The/", "__class": "Publication" } ]