[ { "id": "knapp_michael_2004_MAS", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Memory Allocation Strategies for Large Volumetric Data-Sets", "date": "2004-12", "abstract": "Since the development of medical three dimensional imaging devices\r\nin the 1970s, volumetric data processing has tremendously gained in\r\nimportance. With the growing size of the data-sets, exhausting the\r\ncapabilities of the hardware of its time, methods for efficient\r\nvolumetric data processing have been always a hot topic. In this\r\ndiploma thesis two approaches for processing large volumetric\r\ndata-sets are presented. Both approaches utilize a block volume for\r\nstoring the data. Further data compression and out-of-core\r\nprocessing are incorporated. Efficiency is achieved by processing\r\nonly the required portion of data while omitting the non-related\r\ndata having no effect on the intended result of the algorithm. This\r\nis supported by utilization of the knowledge about access patterns\r\nof the algorithm. Also methods for optimizing the efficiency by\r\nexploiting architectural properties of the computer hardware are\r\npresented.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1815, "image_height": 1368, "name": "knapp_michael_2004_MAS-image.jpg", "type": "image/jpeg", "size": 264037, "path": "Publication:knapp_michael_2004_MAS", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/knapp_michael_2004_MAS-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/knapp_michael_2004_MAS-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 172 ], "supervisor": [ 160 ], "research_areas": [], "keywords": [ "volume processing", "large data" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 1815, "image_height": 1368, "name": "knapp_michael_2004_MAS-image.jpg", "type": "image/jpeg", "size": 264037, "path": "Publication:knapp_michael_2004_MAS", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/knapp_michael_2004_MAS-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/knapp_michael_2004_MAS-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "knapp_michael_2004_MAS-Thesis.pdf", "type": "application/pdf", "size": 8551553, "path": "Publication:knapp_michael_2004_MAS", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/knapp_michael_2004_MAS-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/knapp_michael_2004_MAS-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp_michael_2004_MAS/", "__class": "Publication" }, { "id": "Neum04Hig", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "High-resolution Depth and Reflectance Map Estimation in Underwater Imaging", "date": "2004-12", "abstract": "This paper describes \r\na novel technique to simultaneously determining the threedimensional\r\ngeometry and reflectance map of a scene in underwater\r\nimaging. Underwater light is affected\r\nby an exponential wavelenght-dependent absorption\r\nand undesired scattering effects. These special conditions\r\nmake image and video processing a difficult task in participating\r\nmedia. It is shown how to use this disturbing\r\nabsorption effect to find a new way to accurately estimate\r\nthe scene depth-map and multispectral reflectivities.\r\nThe process requires the acquisition of a multispectral image\r\nof the underwater scenario with the appropriate camera\r\nand lightsource arrangement. The algorithm has been tested\r\non several synthetic images for different noise levels. The\r\npromising results show that the technique provides accurate\r\nand stable results.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 177, 460, 461, 232 ], "number": "TR-186-2-04-14", "research_areas": [], "keywords": [ "Underwater Imaging", "Depth Map" ], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04Hig/", "__class": "Publication" }, { "id": "Neumann-2004-HOB", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Human Observation Based Generalized Gamma Functions", "date": "2004-12", "abstract": "This paper describes an accurate method to obtain the\nTone Reproduction Curve (TRC) of display devices without using\na measurement device. It is an improvement of an existing technique\nbased on human observation, solving its problem of numerical instability\nand resulting in functions in log--log scale which correspond better\nto the nature of display devices.\nWe demonstrate the effiency of our technique on different monitor\ntechnologies, comparing it with direct measurements using a\nspectrophotometer.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Neumann-2004-HOB-.pdf", "type": "application/pdf", "size": 205123, "path": "Publication:Neumann-2004-HOB", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neumann-2004-HOB/Neumann-2004-HOB-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neumann-2004-HOB/Neumann-2004-HOB-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 232, 191, 177, 222, 190 ], "number": "TR-186-2-04-13", "research_areas": [], "keywords": [ "Display Measurement", "Human Visual System", "Spatial Vision" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Neumann-2004-HOB-.pdf", "type": "application/pdf", "size": 205123, "path": "Publication:Neumann-2004-HOB", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neumann-2004-HOB/Neumann-2004-HOB-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neumann-2004-HOB/Neumann-2004-HOB-:thumb{{size}}.png" } ], "projects_workgroups": [ "realreflect" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neumann-2004-HOB/", "__class": "Publication" }, { "id": "LaCruz2004", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Non-linear Model Fitting to Parameterize Diseased Blood Vessels", "date": "2004-10", "abstract": "Accurate estimation of vessel parameters is a prerequisite for automated visualization and analysis of normal and diseased blood vessels. The objective of this research is to estimate the dimensions of lower extremity arteries, imaged by computed tomography (CT). The vessel is modeled using an elliptical or cylindrical structure with specific dimensions, orientation and blood vessel mean density. The model separates two homogeneous regions: Its inner side represents a region of density for vessels, and its outer side a region for background. Taking into account the point spread function (PSF) of a CT scanner, a function is modeled with a Gaussian kernel, in order to smooth the vessel boundary in the model. A new strategy for vessel parameter estimation is presented. It stems from vessel model and model parameter optimization by a nonlinear optimization procedure (the Levenberg-Marquardt technique). The method provides center location, diameter and orientation of the vessel as well as blood and background mean density values. The method is tested on synthetic data and real patient data with encouraging results.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 600, "image_height": 600, "name": "LaCruz2004-image.jpg", "type": "image/jpeg", "size": 30878, "path": "Publication:LaCruz2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/LaCruz2004-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/LaCruz2004-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 168, 167, 169, 170, 166, 164 ], "booktitle": "IEEE Visualization 2004", "editor": "IEEE", "isbn": "0-7803-8788-0", "location": "Austin, Texas", "organization": "Institute of Computer Graphics and Algorithms, Vienna University of Technology", "pages_from": "400", "pages_to": "393", "publisher": "IEEE", "research_areas": [], "keywords": [ "Visualiyation", "Segmentation", "Blood Vessel Detection" ], "weblinks": [], "files": [ { "description": null, "filetitle": "alacruzVIS2004", "main_file": true, "use_in_gallery": false, "access": "public", "name": "LaCruz2004-alacruzVIS2004.pdf", "type": "application/pdf", "size": 1806922, "path": "Publication:LaCruz2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/LaCruz2004-alacruzVIS2004.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/LaCruz2004-alacruzVIS2004:thumb{{size}}.png" }, { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 600, "image_height": 600, "name": "LaCruz2004-image.jpg", "type": "image/jpeg", "size": 30878, "path": "Publication:LaCruz2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/LaCruz2004-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/LaCruz2004-image:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz2004/", "__class": "Publication" }, { "id": "Mlejnek-2004-ITVAC", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive Thickness Visualization of Articular Cartilage", "date": "2004-10", "abstract": "This paper describes a method to visualize the thickness of curved\r\nthin objects. Given the MRI volume data of articular cartilage,\r\nmedical doctors investigate pathological changes of the thickness.\r\nSince the tissue is very thin, it is impossible to reliably map\r\nthe thickness information by direct volume rendering. Our idea is\r\nbased on unfolding of such structures preserving their thickness.\r\nThis allows to perform anisotropic geometrical operations (e.g.,\r\nscaling the thickness). However, flattening of a curved structure\r\nimplies a distortion of its surface. The distortion problem is\r\nalleviated through a focus-and-context minimization approach.\r\nDistortion is smallest close to a focal point which can be\r\ninteractively selected by the user.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 462, "image_height": 209, "name": "Mlejnek-2004-ITVAC-image.jpg", "type": "image/jpeg", "size": 29611, "path": "Publication:Mlejnek-2004-ITVAC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/Mlejnek-2004-ITVAC-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/Mlejnek-2004-ITVAC-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 179, 459, 166 ], "booktitle": "Proceedings of Visualization 2004", "pages_from": "521", "pages_to": "527", "research_areas": [], "keywords": [ "visualization in medicine", "applications of visualization" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 462, "image_height": 209, "name": "Mlejnek-2004-ITVAC-image.jpg", "type": "image/jpeg", "size": 29611, "path": "Publication:Mlejnek-2004-ITVAC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/Mlejnek-2004-ITVAC-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/Mlejnek-2004-ITVAC-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Mlejnek-2004-ITVAC-paper.pdf", "type": "application/pdf", "size": 3435318, "path": "Publication:Mlejnek-2004-ITVAC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/Mlejnek-2004-ITVAC-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/Mlejnek-2004-ITVAC-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "COMRADE" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Mlejnek-2004-ITVAC/", "__class": "Publication" }, { "id": "doleisch-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Visual Analysis of Complex Simulation Data using Multiple Heterogenous Views", "date": "2004-10", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 212 ], "date_end": "2004-10", "date_start": "2000-09", "supervisor": [ 166, 176 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "doleisch-thesis-pdf.pdf", "type": "application/pdf", "size": 50612099, "path": "Publication:doleisch-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/doleisch-thesis/doleisch-thesis-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/doleisch-thesis/doleisch-thesis-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/doleisch-thesis/", "__class": "Publication" }, { "id": "grimm-2004-arefined", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "A Refined Data Addressing and Processing Scheme to Accelerate Volume Raycasting", "date": "2004-10", "abstract": "Most volume rendering systems based on CPU volume raycasting still suffer from inefficient CPU utilization and high memory usage. To target these issues we present a new technique for efficient data addressing. Furthermore, we introduce a new processing scheme for volume raycasting which exploits thread-level parallelism—a technology now supported by commodity computer architectures.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 274, "name": "grimm-2004-arefined-image.jpg", "type": "image/jpeg", "size": 24183, "path": "Publication:grimm-2004-arefined", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/grimm-2004-arefined-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/grimm-2004-arefined-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 160, 161, 162, 166 ], "booktitle": "Computer & Graphics, Vol. 28 (5)", "isbn": "0097-8493", "issn": "0097-8493", "journal": "Computers & Graphics", "number": "5", "pages_from": "719", "pages_to": "729", "volume": "28", "research_areas": [], "keywords": [ "Volume Raycasting, Bricking, Parallel Co" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 274, "name": "grimm-2004-arefined-image.jpg", "type": "image/jpeg", "size": 24183, "path": "Publication:grimm-2004-arefined", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/grimm-2004-arefined-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/grimm-2004-arefined-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "grimm-2004-arefined-Paper.pdf", "type": "application/pdf", "size": 292031, "path": "Publication:grimm-2004-arefined", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/grimm-2004-arefined-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/grimm-2004-arefined-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-arefined/", "__class": "Publication" }, { "id": "GRIMM-2004-FDMX-P", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Flexible Direct Multi-Volume Rendering in Interactive Scenes", "date": "2004-10", "abstract": "In this paper we describe methods to efficiently visualize multiple ntersecting volumetric objects. We introduce the concept of V-Objects. V-Objects represent abstract properties of an object connected to a volumetric data source. We present a method to perform direct volume rendering of a scene comprised of an arbitrary number of possibly intersecting V-Objects. The idea of our approach is to distinguish between regions of intersection, which need costly multi-volume processing, and regions containing only one V-Object, which can be processed using a highly efficient brick-wise volume traversal scheme. Using this method, we achieve significant performance gains for multi-volume rendering. We show possible medical applications, such as surgical planning, diagnosis, and education.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "GRIMM-2004-FDMX-P-image.jpg", "type": "image/jpeg", "size": 30770, "path": "Publication:GRIMM-2004-FDMX-P", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/GRIMM-2004-FDMX-P-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/GRIMM-2004-FDMX-P-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 160, 161, 162, 166 ], "booktitle": "Vision, Modeling, and Visualization (VMV)", "location": "Stanford, USA", "pages_from": "386", "pages_to": "379", "research_areas": [], "keywords": [ "multi volume rendering", "medical visualization", "volume raycasting" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "GRIMM-2004-FDMX-P-image.jpg", "type": "image/jpeg", "size": 30770, "path": "Publication:GRIMM-2004-FDMX-P", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/GRIMM-2004-FDMX-P-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/GRIMM-2004-FDMX-P-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "GRIMM-2004-FDMX-P-Paper.pdf", "type": "application/pdf", "size": 1785611, "path": "Publication:GRIMM-2004-FDMX-P", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/GRIMM-2004-FDMX-P-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/GRIMM-2004-FDMX-P-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-FDMX-P/", "__class": "Publication" }, { "id": "grimm-2004-memory", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Memory Efficient Acceleration Structures and Techniques for CPU-based Volume Raycasting of Large Data", "date": "2004-10", "abstract": "Most CPU-based volume raycasting approaches achieve high performance by advanced memory layouts, space subdivision, and excessive pre-computing. Such approaches typically need an enormous amount of memory. They are limited to sizes which do not satisfy the medical data used in daily clinical routine. We present a new volume raycasting approach based on image-ordered raycasting with object-ordered processing, which is able to perform high-quality rendering of very large medical data in real-time on commodity computers. For large medical data such as computed tomographic (CT) angiography run-offs (512x512x1202) we achieve rendering times up to 2.5 fps on a commodity notebook. We achieve this by introducing a memory efficient acceleration technique for on-the-fly gradient estimation and a memory efficient hybrid removal and skipping technique of transparent regions. We employ quantized binary histograms, granular resolution octrees, and a cell invisibility cache. These acceleration structures require just a small extra storage of approximately 10%. ", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "grimm-2004-memory-image.jpg", "type": "image/jpeg", "size": 54582, "path": "Publication:grimm-2004-memory", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/grimm-2004-memory-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/grimm-2004-memory-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 160, 161, 162, 166 ], "booktitle": "Proceedings IEEE/SIGGRAPH Symposium on Volume Visualization and Graphics", "editor": "D. Silver, T. Ertl, C. Silva", "isbn": "0-7803-8781-3", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "Three-Dimensional Graphics and Realism," ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "grimm-2004-memory-image.jpg", "type": "image/jpeg", "size": 54582, "path": "Publication:grimm-2004-memory", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/grimm-2004-memory-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/grimm-2004-memory-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "grimm-2004-memory-Paper.pdf", "type": "application/pdf", "size": 582605, "path": "Publication:grimm-2004-memory", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/grimm-2004-memory-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/grimm-2004-memory-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-memory/", "__class": "Publication" }, { "id": "Viola-2004-ImpX2", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Importance-Driven Volume Rendering", "date": "2004-10", "abstract": "This paper introduces importance-driven volume rendering as a\r\nnovel technique for automatic focus and context display of volumetric\r\ndata. Our technique is a generalization of cut-away views,\r\nwhich – depending on the viewpoint – remove or suppress less important\r\nparts of a scene to reveal more important underlying information.\r\nWe automatize and apply this idea to volumetric data.\r\nEach part of the volumetric data is assigned an object importance\r\nwhich encodes visibility priority. This property determines which\r\nstructures should be readily discernible and which structures are\r\nless important. In those image regions, where an object occludes\r\nmore important structures it is displayed more sparsely than in those\r\nareas where no occlusion occurs. Thus the objects of interest are\r\nclearly visible. For each object several representations, i.e., levels of\r\nsparseness, are specified. The display of an individual object may\r\nincorporate different levels of sparseness. The goal is to emphasize\r\nimportant structures and to maximize the information content in the\r\nfinal image.\r\nThis paper also discusses several possible schemes for level of\r\nsparseness specification and different ways how object importance\r\ncan be composited to determine the final appearance of a particular\r\nobject.", "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": 244, "name": "Viola-2004-ImpX2-image.jpg", "type": "image/jpeg", "size": 12593, "path": "Publication:Viola-2004-ImpX2", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/Viola-2004-ImpX2-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/Viola-2004-ImpX2-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171, 162, 166 ], "booktitle": "Proceedings of IEEE Visualization 2004", "isbn": "0780387880", "pages_from": "139", "pages_to": "145", "publisher": "H. Rushmeier, G. Turk, J. van Wijk", "research_areas": [], "keywords": [ "view-dependent visualization", "non-photorealistic techniques", "level-of-detail techniques", "focus+context techniques", "volume rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 250, "image_height": 244, "name": "Viola-2004-ImpX2-image.jpg", "type": "image/jpeg", "size": 12593, "path": "Publication:Viola-2004-ImpX2", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/Viola-2004-ImpX2-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/Viola-2004-ImpX2-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Viola-2004-ImpX2-Paper.pdf", "type": "application/pdf", "size": 10556380, "path": "Publication:Viola-2004-ImpX2", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/Viola-2004-ImpX2-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/Viola-2004-ImpX2-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-ImpX2/", "__class": "Publication" }, { "id": "StrakaVis2004", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The VesselGlyph: Focus & Context Visualization in CT-Angiography", "date": "2004-10", "abstract": "Reliable and complete blood-vessel segmentation is still a challenging problem. This is especially true in the presence of morphologic changes resulting from atherosclerotic diseases. In this paper we take advantage of partially segmented data with approximately identified vessel centerlines to comprehensively visualize the diseased peripheral arterial tree. We introduce the VesselGlyph as an abstract notation for novel focus & context visualization techniques of tubular structures such as contrast-medium enhanced arteries in CT-Angiography (CT-A). The proposed techniques combine direct volume rendering (DVR) and curved planar reformation (CPR) within a single image. The VesselGlyph consists of several regions where different rendering methods are used. Region type, the used visualization method and region parameters depend on the distance from the vessel centerline and on viewing parameters as well. By selecting proper rendering techniques for different regions, vessels are depicted in a naturally looking and undistorted anatomic context. In this paper we furthermore present a way how to implement the proposed techniques in software and by means of modern 3D graphics accelerators.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 618, "image_height": 750, "name": "StrakaVis2004-image.jpg", "type": "image/jpeg", "size": 91043, "path": "Publication:StrakaVis2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/StrakaVis2004-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/StrakaVis2004-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 347, 168, 169, 170, 166, 164 ], "booktitle": "IEEE Visualization 2004", "editor": "IEEE", "location": "Austin, Texas", "organization": "Commision for Scientific Visualization, Austrian", "pages_from": "392", "pages_to": "385", "publisher": "IEEE", "research_areas": [], "keywords": [ "focus & Context Technique", "Direct Volume Rendering", "Curved Planar Reformation", "Vessel Visualization" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "StrakaVis2004-.pdf", "type": "application/pdf", "size": 1060701, "path": "Publication:StrakaVis2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/StrakaVis2004-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/StrakaVis2004-:thumb{{size}}.png" }, { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 618, "image_height": 750, "name": "StrakaVis2004-image.jpg", "type": "image/jpeg", "size": 91043, "path": "Publication:StrakaVis2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/StrakaVis2004-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/StrakaVis2004-image:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/StrakaVis2004/", "__class": "Publication" }, { "id": "grimm-2004-volume", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "VOTS: VOlume doTS as a Point-Based Representation of Volumetric Data", "date": "2004-09", "abstract": "We present Volume dots (Vots), a new primitive for volumetric data modelling, processing, and rendering. Vots\r\nare a point-based representation of volumetric data. An individual Vot is specified by the coefficients of a Taylor\r\nseries expansion, i.e. the function value and higher order derivatives at a specific point. A Vot does not only\r\nrepresent a single sample point, it represents the underlying function within a region. With the Vots representation\r\nwe have a more intuitive and high-level description of the volume data. This allows direct analytical examination\r\nand manipulation of volumetric datasets. Vots enable the representation of the underlying scalar function with\r\nspecified precision. User-centric importance sampling is also possible, i.e., unimportant volume parts are still\r\npresent but represented with just very few Vots. As proof of concept, we show Maximum Intensity Projection based\r\non Vots.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "grimm-2004-volume-image.jpg", "type": "image/jpeg", "size": 23114, "path": "Publication:grimm-2004-volume", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/grimm-2004-volume-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/grimm-2004-volume-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 160, 161, 162, 166 ], "issn": "0167-7055", "journal": "Computer Graphics Forum", "number": "3", "pages_from": "668", "pages_to": "661", "volume": "23", "research_areas": [], "keywords": [ "Graphics Data Structures and Data Types" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "grimm-2004-volume-image.jpg", "type": "image/jpeg", "size": 23114, "path": "Publication:grimm-2004-volume", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/grimm-2004-volume-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/grimm-2004-volume-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "grimm-2004-volume-Paper.pdf", "type": "application/pdf", "size": 2257047, "path": "Publication:grimm-2004-volume", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/grimm-2004-volume-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/grimm-2004-volume-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/grimm-2004-volume/", "__class": "Publication" }, { "id": "konyha-2004-ela", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Visualization of Elastic Body Dynamics for Automotive Engine Simulations", "date": "2004-09", "abstract": "Simulation of engine dynamics is a well established field of\r\nwork in the automotive industry. We have worked closely\r\nwith one of the companies developing industry-leading\r\nsoftware for dynamic simulation of cranktrains to improve\r\nthe model creation in their product. We have extended the\r\nmodeler with a 3D preview of the engine which enables\r\nusers to view a more direct representation of the design,\r\nthereby improving the pace and efficiency of their work.\r\nThe data sets resulting from the simulation are vast. Previously,\r\nanalysis could only be performed using 2D charts\r\nonly. As a result of our co-operation it is now possible to\r\ninspect the simulation results in an interactive 3D visualization\r\nenvionment.", "authors_et_al": false, "substitute": null, "main_image": { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 236, "image_height": 178, "name": "konyha-2004-ela-jpg.jpg", "type": "image/jpeg", "size": 30432, "path": "Publication:konyha-2004-ela", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/konyha-2004-ela-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/konyha-2004-ela-jpg:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 756, 580, 235, 585 ], "booktitle": "Proceedings of IASTED Visualization, Imaging, and Image Processing, VIIP 2004", "date_from": "2004-09-06", "date_to": "2004-09-08", "editor": "Prof. Juan J. Villanieva", "isbn": "0-88986-454-3", "lecturer": [ 756 ], "location": "Marbella, Spain", "publisher": "ACTA Press", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 236, "image_height": 178, "name": "konyha-2004-ela-jpg.jpg", "type": "image/jpeg", "size": 30432, "path": "Publication:konyha-2004-ela", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/konyha-2004-ela-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/konyha-2004-ela-jpg:thumb{{size}}.png" }, { "description": "paper", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "konyha-2004-ela-pdf.pdf", "type": "application/pdf", "size": 1011361, "path": "Publication:konyha-2004-ela", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/konyha-2004-ela-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/konyha-2004-ela-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/konyha-2004-ela/", "__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": "binder-2004-supp", "type_id": "journalpaper_notalk", "tu_id": null, "repositum_id": null, "title": "Supporting Configurability in a Tangibly Augmented Environment for Design Students", "date": "2004-07", "abstract": "In many environments, the landscape of space and artefacts is evolving and changing with the tasks at hand. Integrating digital media and computation in these environments has to take into account the fact that people will configure space functions and tools according to the situation, organising use in unexpected ways. In this article, we present and discuss how the issue of configurability is dealt with, in a series of field trials with design students. The aim of these trials was to construct, for architecture and interaction design students, a mixed-media environment for inspirational learning. The results include physical infrastructure in space and in furniture as integral parts of the interaction technology and the creation of composite representations called ldquomixed objectslsquorsquo, which blend digital and non-digital media in one design artefact. Configurability has to be supported at different levels (infrastructures, artefacts, functions) and across the physical and digital realms.", "authors_et_al": false, "substitute": null, "main_image": { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 349, "image_height": 264, "name": "binder-2004-supp-jpg.jpg", "type": "image/jpeg", "size": 31529, "path": "Publication:binder-2004-supp", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/binder-2004-supp-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/binder-2004-supp-jpg:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 638, 639, 249, 640, 235, 26, 586 ], "issn": "1617-4909", "journal": "Personal and Ubiquitous Computing", "number": "5", "pages_from": "310", "pages_to": "325", "volume": "8", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 349, "image_height": 264, "name": "binder-2004-supp-jpg.jpg", "type": "image/jpeg", "size": 31529, "path": "Publication:binder-2004-supp", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/binder-2004-supp-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/binder-2004-supp-jpg:thumb{{size}}.png" }, { "description": "paper", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "binder-2004-supp-pdf.pdf", "type": "application/pdf", "size": 628015, "path": "Publication:binder-2004-supp", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/binder-2004-supp-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/binder-2004-supp-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/binder-2004-supp/", "__class": "Publication" }, { "id": "Wilkie-2004-AMS", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "An Analytical Model for Skylight Polarisation", "date": "2004-06", "abstract": "Under certain circumstances the polarisation state of the illumination can have a significant influence on the appearance of scenes; outdoor scenes with specular surfaces -- such as water bodies or windows -- under clear, blue skies are good examples of such environments. In cases like that it can be essential to use a polarising renderer if a true prediction of nature is intended, but so far no polarising skylight models have been presented.\n \nThis paper presents a plausible analytical model for the polarisation of the light emitted from a clear sky. Our approach is based on a suitable combination of several components with well-known characteristics, and yields acceptable results in considerably less time than an exhaustive simulation of the underlying atmospheric scattering phenomena would require.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 480, "image_height": 640, "name": "Wilkie-2004-AMS-image.jpg", "type": "image/jpeg", "size": 231746, "path": "Publication:Wilkie-2004-AMS", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/Wilkie-2004-AMS-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/Wilkie-2004-AMS-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 192, 216, 225, 222, 190 ], "booktitle": "Proceedings of the Eurographics Symposium on Rendering", "editor": "Alexander Keller and Henrik Wann Jensen ", "isbn": "3-905673-12-6", "lecturer": [ 192 ], "pages_from": "387", "pages_to": "399", "publisher": "?", "research_areas": [ "Rendering" ], "keywords": [ "skylight rendering", "polarisation" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Wilkie-2004-AMS-.pdf", "type": "application/pdf", "size": 8088113, "path": "Publication:Wilkie-2004-AMS", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/Wilkie-2004-AMS-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/Wilkie-2004-AMS-:thumb{{size}}.png" }, { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 480, "image_height": 640, "name": "Wilkie-2004-AMS-image.jpg", "type": "image/jpeg", "size": 231746, "path": "Publication:Wilkie-2004-AMS", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/Wilkie-2004-AMS-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/Wilkie-2004-AMS-image:thumb{{size}}.png" } ], "projects_workgroups": [ "Skydome" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Wilkie-2004-AMS/", "__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, 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"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": 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"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": "bruckner-2004-EVV", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Efficient Volume Visualization of Large Medical Datasets", "date": "2004-05", "abstract": "The size of volumetric datasets used in medical environments is increasing at a rapid pace. Due to excessive pre-computation and memory demanding data structures, most current approaches for volume visualization do not meet the requirements of daily clinical routine. In this diploma thesis, an approach for interactive high-quality rendering of large medical data is presented. It is based on image-order raycasting with object-order data traversal, using an optimized cache coherent memory layout. New techniques and parallelization strategies for direct volume rendering of large data on commodity hardware are presented. By using new memory efficient acceleration data structures, high-quality direct volume rendering of several hundred megabyte sized datasets at sub-second frame rates on a commodity notebook is achieved.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 300, "name": "bruckner-2004-EVV-image.jpg", "type": "image/jpeg", "size": 18530, "path": "Publication:bruckner-2004-EVV", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 161 ], "supervisor": [ 160 ], "research_areas": [], "keywords": [ "volume rendering", "large data" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 300, "name": "bruckner-2004-EVV-image.jpg", "type": "image/jpeg", "size": 18530, "path": "Publication:bruckner-2004-EVV", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Short Version", "main_file": false, "use_in_gallery": false, "access": "public", "name": "bruckner-2004-EVV-Short Version.pdf", "type": "application/pdf", "size": 1527888, "path": "Publication:bruckner-2004-EVV", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-Short Version.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-Short Version:thumb{{size}}.png" }, { "description": null, "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "bruckner-2004-EVV-Thesis.pdf", "type": "application/pdf", "size": 4819243, "path": "Publication:bruckner-2004-EVV", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/bruckner-2004-EVV-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/bruckner-2004-EVV/", "__class": "Publication" }, { "id": "matt-masterthesis", "type_id": "masterthesis", "tu_id": null, "repositum_id": null, "title": "Practical Reconstruction Schemes and Hardware-Accelerated Direct Volume Rendering on Body-Centered Cubic Grids", "date": "2004-05", "abstract": "It is well known in the signal-processing community that the Body-Centered Cubic grid is the\r\noptimal sampling grid in 3D. In volume visualization, the Cartesian grid is by far the most popular\r\ntype of grid because it is convenient to handle. But it requires 29.3% more samples than\r\nthe Body-Centered Cubic grid. In order to convince people used to Cartesian grids for years of\r\nthe advantages of Body-Centered Cubic grids, we must prove their usability in many different\r\nvolume rendering algorithms. Further we have to show that we get a performance gain without\r\nor with only slight loss of image quality compared to Cartesian grids. Therefore we introduce\r\nseveral practical reconstruction schemes on Body-Centered Cubic grids, which are very general\r\nand can be used in a number of applications and tasks.\r\nTogether with the development of powerful and flexible consumer graphics hardware, interactive\r\nhardware-accelerated volume rendering algorithms gain popularity. Rendering performance\r\nbecomes a big issue, which can be a strong argument in favour of Body-Centered Cubic\r\ngrids. We adapted some of the most popular volume rendering approaches exploiting hardwareacceleration\r\nto Body-Centered Cubic grids: both 2D and 3D texture-based volume rendering\r\nand the projected tetrahedra algorithm. At least partly we succeeded in achieving a performance\r\ngain on our new grid and further produced some impressive rendering results comparable to the\r\nCartesian grid version.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 513, "image_height": 512, "name": "matt-masterthesis-image.jpg", "type": "image/jpeg", "size": 26831, "path": "Publication:matt-masterthesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/matt-masterthesis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/matt-masterthesis-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 326 ], "note": "1", "supervisor": [ 166 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 513, "image_height": 512, "name": "matt-masterthesis-image.jpg", "type": "image/jpeg", "size": 26831, "path": "Publication:matt-masterthesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/matt-masterthesis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/matt-masterthesis-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Thesis", "main_file": true, "use_in_gallery": false, "access": "public", "name": "matt-masterthesis-Thesis.pdf", "type": "application/pdf", "size": 7844071, "path": "Publication:matt-masterthesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/matt-masterthesis-Thesis.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/matt-masterthesis-Thesis:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matt-masterthesis/", "__class": "Publication" }, { "id": "matkovic-2004-tang", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Tangible Image Query", "date": "2004-05", "abstract": "This paper introduces a tangible user interface for browsing\r\nand retrieving images from an image database. The basis\r\nfor the query to the image database is a color layout sketch,\r\nwhich is used by the underlying query algorithm to find the\r\nbest matches. The users are provided with colored cubes of\r\nvarious sizes (1.5 to 4 cm) and colors (8 base colors). The\r\nusers can place and arrange the colored cubes on a small\r\ntable to create a color layout sketch. Multiple users can use\r\nthis interface to collaborate in an image query. To evaluate\r\nthe benefits of the interface, it is compared to a traditional\r\nGUI application in which the users use a mouse to create a\r\ncolor layout sketch.", "authors_et_al": false, "substitute": null, "main_image": { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 258, "image_height": 198, "name": "matkovic-2004-tang-jpg.jpg", "type": "image/jpeg", "size": 42116, "path": "Publication:matkovic-2004-tang", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/matkovic-2004-tang-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/matkovic-2004-tang-jpg:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 235, 26, 586, 190 ], "booktitle": "Proceedings of Smart Graphics 2004", "date_from": "2004-05-23", "date_to": "2004-05-25", "lecturer": [ 235 ], "location": "Banff, Canada", "publisher": "Springer", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 258, "image_height": 198, "name": "matkovic-2004-tang-jpg.jpg", "type": "image/jpeg", "size": 42116, "path": "Publication:matkovic-2004-tang", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/matkovic-2004-tang-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/matkovic-2004-tang-jpg:thumb{{size}}.png" }, { "description": "paper", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "matkovic-2004-tang-pdf.pdf", "type": "application/pdf", "size": 576896, "path": "Publication:matkovic-2004-tang", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/matkovic-2004-tang-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/matkovic-2004-tang-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-tang/", "__class": "Publication" }, { "id": "alacruzVisSym2004", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Accuracy Evaluation of Diferent Centerline Approximations of Blood Vessels", "date": "2004-05", "abstract": " Accurate determination of the central vessel axis is a prerequisite for automated arteries diseases visualization and quantification. In this paper we present an evaluation of different methods used to approximate the centerline of the vessel in a phantom simulating the peripheral arteries. Six algorithms were used to determine the centerline of a synthetic peripheral arterial vessel. They are based on: ray casting technique using thresholds and maximum gradient-like stop criterion, pixel motion estimation between successive images called block matching, center of gravity and shape based segmentation. The Randomized Hough Transform and ellipse fitting using Lagrange Multiplier have been used as shape based segmentation techniques, fitting an elliptical shape to a set of points. The synthetic data simulate the peripheral arterial tree (aorta-to-pedal). The vessel diameter changes along the z-axis from about 0.7 to about 23 voxels. The data dimension is 256x256x768 with voxel size 0.5x0.5x0.5mm. In this data set the centerline is known and an estimation of the error is calculated in order to determine how precise a given method is and to classify it accordingly.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "alacruzVisSym2004-.pdf", "type": "application/pdf", "size": 1484850, "path": "Publication:alacruzVisSym2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/alacruzVisSym2004/alacruzVisSym2004-.pdf", "thumb_image_sizes": [] }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 168 ], "booktitle": "Symposium on Visualization 2004", "editor": "EUROGRAPHICS / IEEE TCGV", "location": "Konstanz, Germany", "organization": "Institute of Computer Graphics and Algorithms, Vienna University of Technology", "pages_from": "120", "pages_to": "115", "publisher": "IEEE", "research_areas": [], "keywords": [ "Center Line Detection", "Vessel Segmentation", "Medical Visualization" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": true, "use_in_gallery": false, "access": "public", "name": "alacruzVisSym2004-.pdf", "type": "application/pdf", "size": 1484850, "path": "Publication:alacruzVisSym2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/alacruzVisSym2004/alacruzVisSym2004-.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/alacruzVisSym2004/", "__class": "Publication" }, { "id": "Viola-2004-GPU", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "GPU-based Frequency Domain Volume Rendering", "date": "2004-04", "abstract": "Frequency domain volume rendering (FVR) is a volume\r\nrendering technique with lower computational complexity\r\nas compared to other techniques. In this paper\r\nthe FVR algorithm is accelerated by factor of 17\r\nby mapping the rendering stage to the GPU. The overall\r\nhardware-accelerated pipeline is discussed and the\r\nchanges according to previous work are pointed out. The\r\nthree-dimensional transformation into frequency domain\r\nis done in a pre-processing step. The rendering step is\r\ncomputed completely on the GPU. First the projection\r\nslice is extracted. Four different interpolation schemes\r\nare used for resampling the slice from the data represented\r\nby a 3D texture. The extracted slice is transformed\r\nback into the spatial domain using the inverse\r\nFast Fourier or Fast Hartley Transform. The rendering\r\nstage is implemented through shader programs running\r\non programmable graphics hardware achieving highly interactive\r\nframerates.", "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": 200, "name": "Viola-2004-GPU-image.jpg", "type": "image/jpeg", "size": 10116, "path": "Publication:Viola-2004-GPU", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/Viola-2004-GPU-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/Viola-2004-GPU-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171, 162, 166 ], "booktitle": "Proceedings of SCCG 2004", "isbn": "80-223-1730-6", "note": "second-best paper award!", "pages_from": "49", "pages_to": "58", "research_areas": [], "keywords": [ "Fourier Transform", "Fourier Volume Rendering", "Hardware Acceleration" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 200, "image_height": 200, "name": "Viola-2004-GPU-image.jpg", "type": "image/jpeg", "size": 10116, "path": "Publication:Viola-2004-GPU", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/Viola-2004-GPU-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/Viola-2004-GPU-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Viola-2004-GPU-Paper.pdf", "type": "application/pdf", "size": 1225586, "path": "Publication:Viola-2004-GPU", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/Viola-2004-GPU-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/Viola-2004-GPU-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Viola-2004-GPU/", "__class": "Publication" }, { "id": "zotti-2004-stone", "type_id": "poster", "tu_id": null, "repositum_id": null, "title": "Stone-Age Monumental Circular Ditch Systems", "date": "2004-04", "abstract": "Exhibition on Virtual Reconstructions in Cultural Heritage, now online at http://www.visibleart.net/artwork.php?artid=197 .", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222, 249, 479, 480 ], "date_from": "2004-04-22", "date_to": "2004-04-24", "event": "Spring Conference on Computer Graphics 2004", "location": "Budmerice, Slovakia", "research_areas": [], "keywords": [ "archeo-astronomy", "virtual reconstruction" ], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/zotti-2004-stone/", "__class": "Publication" }, { "id": "Straka-2004-TVG", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "The VesselGlyph: Focus & Context Visualization in CT-Angiography", "date": "2004-04", "abstract": "Reliable and complete blood-vessel segmentation is still a challenging problem. This is especially true in the presence of morphologic changes resulting from atherosclerotic diseases. In this paper we take advantage of partially segmented data with approximately identified vessel centerlines to comprehensively visualize the diseased peripheral arterial tree.\r\nWe introduce the VesselGlyph as an abstract notation for novel focus & context visualization techniques of tubular structures such as contrast-medium enhanced arteries in CT-Angiography (CT-A). The proposed techniques combine direct volume rendering (DVR) and curved planar reformation (CPR) within a single image. The VesselGlyph consists of several regions where different rendering methods are used. Region type, the used visualization method and region parameters depend on the distance from the vessel centerline and on viewing parameters as well. By selecting proper rendering techniques for different regions, vessels are depicted in a naturally looking and undistorted anatomic context.\r\nIn this paper we furthermore present a way how to implement the proposed techniques in software and by means of modern 3D graphics accelerators.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 618, "image_height": 750, "name": "Straka-2004-TVG-image.jpg", "type": "image/jpeg", "size": 91043, "path": "Publication:Straka-2004-TVG", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/Straka-2004-TVG-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/Straka-2004-TVG-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 347, 168, 169, 170, 166, 164 ], "number": "TR-186-2-04-04", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "vessel visualization.", "focus & context technique", "curved planar reformation", "direct volume rendering" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 618, "image_height": 750, "name": "Straka-2004-TVG-image.jpg", "type": "image/jpeg", "size": 91043, "path": "Publication:Straka-2004-TVG", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/Straka-2004-TVG-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/Straka-2004-TVG-image:thumb{{size}}.png" }, { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2004-TVG-paper.pdf", "type": "application/pdf", "size": 5201440, "path": "Publication:Straka-2004-TVG", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/Straka-2004-TVG-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/Straka-2004-TVG-paper:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-TVG/", "__class": "Publication" }, { "id": "LaCruz-2004-NMF", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Non-linear Model Fitting to Parameterize Diseased Blood Vessels", "date": "2004-04", "abstract": "Accurate estimation of vessel parameters is a prerequisite for automated visualization and analysis of normal and diseased blood vessels. The objective of this research is to estimate the dimensions of lower extremity arteries, imaged by computed tomography (CT).\nThe vessel is modeled using an elliptical or cylindrical structure with specific dimensions, orientation and blood vessel mean density. The model separates two homogeneous regions: Its inner side represents a region of density for vessels, and its outer side a region for background. Taking into account the point spread function (PSF) of a CT scanner, a function is modeled with a Gaussian kernel, in order to smooth the vessel boundary in the model. A new strategy for vessel parameter estimation is presented. It\nstems from vessel model and model parameter optimization by a nonlinear optimization procedure (the Levenberg-Marquardt technique). The method provides center location, diameter and orientation of the vessel as well as blood and background mean density values. The method is tested on synthetic data and real patient data with encouraging results.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 168, 167, 169, 170, 166, 164 ], "number": "TR-186-2-04-05", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "Diseased Blood Vessel Detection", "Segmentation", "Visualization" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "LaCruz-2004-NMF-paper.pdf", "type": "application/pdf", "size": 3123971, "path": "Publication:LaCruz-2004-NMF", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz-2004-NMF/LaCruz-2004-NMF-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/LaCruz-2004-NMF/", "__class": "Publication" }, { "id": "GRIMM-2004-PPC", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Parallel Peeling of Curvilinear Grids", "date": "2004-04", "abstract": "In this paper we present a novel hybrid CPU-GPU approach for rendering\r\ncurvilinear grids. Visibility sorting is accomplished by parallel\r\npeeling cells off the grid, utilizing an active cell peeling front. In\r\neach step, we compute the ray-cell intersection coordinates on the\r\nGPU, perform accurate volume integration (CPU), and determine\r\nthe set of active cells for the next iteration (GPU). The approach\r\nrequires only standard graphics capabilities and can therefore be\r\nused on any commodity PC, including laptops. Furthermore, the\r\nmain memory requirements are negligible since the required data\r\nstructures are minimal.\r\nThe main advantage of our algorithm is that we exploit hardware\r\nacceleration for the expensive visibility sorting which is bene-\r\nficial over time due to the faster performance increase of GPUs over\r\nCPUs. Due to the simplicity of the algorithm and its low requirements\r\non preprocessing and main memory, it is well suited for thin\r\nclients. Last but not least, the approach could easily be extended to\r\nirregular grids using tetrahedra.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "GRIMM-2004-PPC-image.jpg", "type": "image/jpeg", "size": 14796, "path": "Publication:GRIMM-2004-PPC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/GRIMM-2004-PPC-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/GRIMM-2004-PPC-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 160, 345, 162, 166 ], "number": "TR-186-2-04-07", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "Raycasting", "Volume Rendering", "Visibility Sorting", "Curvilinear grids", "Depth Sorting" ], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 512, "image_height": 512, "name": "GRIMM-2004-PPC-image.jpg", "type": "image/jpeg", "size": 14796, "path": "Publication:GRIMM-2004-PPC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/GRIMM-2004-PPC-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/GRIMM-2004-PPC-image:thumb{{size}}.png" }, { "description": "", "filetitle": "Paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "GRIMM-2004-PPC-Paper.pdf", "type": "application/pdf", "size": 3432004, "path": "Publication:GRIMM-2004-PPC", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/GRIMM-2004-PPC-Paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/GRIMM-2004-PPC-Paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/GRIMM-2004-PPC/", "__class": "Publication" }, { "id": "alacruzECR2004", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Accuracy of Automated Centerline Approximation Algorithms for Lower Extremity Vessels in CTA Phantom", "date": "2004-03", "abstract": "Purpose: The accurate determination of the central vessel axis is a prerequisite for automated visualization (curved planar reformation) and quantitation. The purpose of this work was to assess the accuracy of different algorithms for automated centerline detection in a phantom simulating the peripheral arterial tree.\r\nMethods and Material: Six algorithms were used to determine the centerline of a synthetic peripheral arterial vessel (aorto-to-pedal arteries, diameter 18-0.6mm) dataset (256x256x600, voxel size 0.5x0.5x0.5mm). They are ray-casting/thresholding (RCT), ray-casting/maximum gradient (RCMG), block matching (BM), fitting to ellipse (FE), center of gravity (CoG), and Randomized Hough transform (RHT). Gaussian noise whith a sigma: 0, 5 and 10 was used to observe the accuracy of the method under noise influence The accuracy of automatic centerline determination was quantified by measuring the error-distance between the derived centerlines, and the known centerline course of the synthetic dataset.\r\nResults: BM demonstrated unacceptable performance in large vessels (>5mm) when the shift used was less than 3 voxels. RCMG demonstrated a greater error (mean of the error 4.73mm) in large diameter (>15mm) vessels than in small diameter (<15mm) vessels (mean of the error 0.64mm). Because RHT and FE use Canny edge detector preprocessing, both are sensitive to noise. CoG and RCT keep the mean of the error-distance significantly smaller (0.7mm and 0.9mm respectively) than all other algorithms.\r\nConclusion: CoG and RCT algorithms provide the most efficient centerline approximation over a wide range of vessel diameters. ", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 168, 167, 169, 170, 166, 164 ], "booktitle": "European Congres of Radiology", "location": "Vienna, Austria", "organization": "Institute of Computer Graphics and Algorithms, Vienna University of Technology", "research_areas": [], "keywords": [ "Medical Visualization", "Vessel Segmentation", "Centerline Detection" ], "weblinks": [], "files": [], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/alacruzECR2004/", "__class": "Publication" }, { "id": "matkovic-2004-sens", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "The Sensitive Sample", "date": "2004-03", "abstract": "This paper describes Sensitive Samples - everyday artifacts\r\nturned into tangible user interfaces, while preserving\r\ntheir original look. The solution presented is inexpensive\r\nand is build on fairly simple technology. The system supports\r\nmultiple samples simultaneously. Sensitive Samples\r\nwere tested at the Academy of Fine Arts in Vienna. Various\r\nobjects, ranging from a simple paper cube up to complex architecture\r\nmodels were turned into sensitive samples. The\r\ntechnical realization and two application examples - The\r\nControl Cube and Materialkammer - are described in the\r\npaper. The Control Cube can be used to trigger six different\r\nactions. Materialkammer describes an inspirational\r\nlearning environment where architecture students can get\r\nfamiliar with materials in an unconventional way.", "authors_et_al": false, "substitute": null, "main_image": { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 155, "image_height": 145, "name": "matkovic-2004-sens-jpg.jpg", "type": "image/jpeg", "size": 23385, "path": "Publication:matkovic-2004-sens", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/matkovic-2004-sens-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/matkovic-2004-sens-jpg:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 235, 26, 586 ], "booktitle": "Proceedings of Beyond Wand and Glove Based Interaction 2004", "date_to": "2004-03-28", "lecturer": [ 26 ], "location": "Chicago, USA", "publisher": "IEEE", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "image", "filetitle": "jpg", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 155, "image_height": 145, "name": "matkovic-2004-sens-jpg.jpg", "type": "image/jpeg", "size": 23385, "path": "Publication:matkovic-2004-sens", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/matkovic-2004-sens-jpg.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/matkovic-2004-sens-jpg:thumb{{size}}.png" }, { "description": "paper", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "matkovic-2004-sens-pdf.pdf", "type": "application/pdf", "size": 771409, "path": "Publication:matkovic-2004-sens", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/matkovic-2004-sens-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/matkovic-2004-sens-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/matkovic-2004-sens/", "__class": "Publication" }, { "id": "knapp-2004-semi", "type_id": "journalpaper", "tu_id": null, "repositum_id": null, "title": "Semi-Automatic Topology Independent Contour-Based 2 1/2 D Segmentation Using Live-Wire", "date": "2004-02", "abstract": "In general three-dimensional segmentation algorithms assume objects to have connected homogeneous regions.\r\nHowever in some cases objects are defined by a fuzzy boundary surface and consist of an inhomogeneous\r\ninternal structure. In the following a new three-dimensional segmentation technique exploiting the contour\r\ndetection capabilities of live-wire is proposed. The algorithm consists of two basic steps. First contours are\r\noutlined by the user on a small number of planar cross-sections through the object using live-wire. Second the\r\ntraced contours are used for reconstructing the object surface automatically in each slice using live-wire again.\r\nThis user-friendly segmentation algorithm is independent from object topology as the topology is implicitly\r\ndefined during the reconstruction process.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "name": "knapp-2004-semi-.pdf", "type": "application/pdf", "size": 6051784, "path": "Publication:knapp-2004-semi", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-semi/knapp-2004-semi-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-semi/knapp-2004-semi-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 172, 162, 166 ], "booktitle": "Journal of WSCG, Vol. 12, Number 2", "isbn": "1213-6972", "issn": "1213-6972", "journal": "Journal of WSCG", "lecturer": [ 172 ], "number": "2", "pages_from": "229", "pages_to": "236", "volume": "12", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "name": "knapp-2004-semi-.pdf", "type": "application/pdf", "size": 6051784, "path": "Publication:knapp-2004-semi", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-semi/knapp-2004-semi-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-semi/knapp-2004-semi-:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-semi/", "__class": "Publication" }, { "id": "Straka-2004-BSA", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Bone Segmentation in CT-Angiography Data Using a Probabilistic Atlas", "date": "2004-01", "abstract": "Automatic segmentation of bony structures in CT angiography datasets is an essential pre-processing step necessary for most visualization and analysis tasks. Since traditional density and gradient operators fail in non-trivial cases (or at least require extensive operator work), we propose a new method for segmentation of CTA data based on a probabilistic atlas. Storing densities and marks of previously manually segmented tissues to the atlas can constitute a statistical information base for latter accurate segmentation. In order to eliminate dimensional and anatomic variability of the atlas input datasets, these have to be spatially normalized (registered) first by applying a non-rigid transformation. After this transformation, densities and tissue masks are statistically processed (e.g averaged) within the atlas. Records in the atlas can be later evaluated for estimating the probability of bone tissue in a voxel of an unsegmented dataset.", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 167, 168, 236, 170, 164, 166 ], "number": "TR-186-2-04-01", "pages_from": "1", "pages_to": "8", "research_areas": [], "keywords": [ "Histogram Classification", "Distance Fields", "Thin-Plate Spline", "Probabilistic Atlas", "Knowledge Based Segmentation", "CT Angiography" ], "weblinks": [], "files": [ { "description": null, "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Straka-2004-BSA-paper.pdf", "type": "application/pdf", "size": 747482, "path": "Publication:Straka-2004-BSA", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-BSA/Straka-2004-BSA-paper.pdf", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Straka-2004-BSA/", "__class": "Publication" }, { "id": "Kanitsar-2004-Dia", "type_id": "techreport", "tu_id": null, "repositum_id": null, "title": "Diagnostic Relevant Visualization of Vascular Structures", "date": "2004-01", "abstract": "Traditional volume visualization techniques sometimes provide incomplete\r\nclinical information needed for applications in medical visualization.\r\nIn the area of vascular visualization important features such as the lumen of a\r\ndiseased vessel segment may not be visible. One way to display vascular structures\r\nfor diagnostic purposes is to generate longitudinal cross-sections in order to\r\nshow their lumen, wall, and surrounding tissue in a curved plane. Curved planar\r\nreformation (CPR) has proven to be an acceptable practical solution. We discuss\r\nfour different methods to generate CPR images from single vessel segments: Projected\r\nCPR, stretched CPR, straightened CPR, and helical CPR. Furthermore we\r\ninvestigate three different methods for displaying vascular trees: Multi-path projected\r\nCPR, multi-path stretched CPR, and untangled CPR. The principle concept\r\nof each method is discussed and detailed information for the realization is given.\r\n In addition the properties, advantages and disadvantages of each method are summarized.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 482, "image_height": 470, "name": "Kanitsar-2004-Dia-image.jpg", "type": "image/jpeg", "size": 39068, "path": "Publication:Kanitsar-2004-Dia", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/Kanitsar-2004-Dia-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/Kanitsar-2004-Dia-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 162, 164, 165, 166 ], "number": "TR-186-2-04-02", "pages_from": "1", "pages_to": "20", "research_areas": [], "keywords": [ "curved planar reformation", "computed tomography angiography", "vessel analysis" ], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 482, "image_height": 470, "name": "Kanitsar-2004-Dia-image.jpg", "type": "image/jpeg", "size": 39068, "path": "Publication:Kanitsar-2004-Dia", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/Kanitsar-2004-Dia-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/Kanitsar-2004-Dia-image:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Kanitsar-2004-Dia-paper.pdf", "type": "application/pdf", "size": 2996860, "path": "Publication:Kanitsar-2004-Dia", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/Kanitsar-2004-Dia-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/Kanitsar-2004-Dia-paper:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-2004-Dia/", "__class": "Publication" }, { "id": "neumann-2004-ipm", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Interactive Perception Based Model for Characterization of Display device", "date": "2004-01", "abstract": "This paper describes a simple to use, yet accurate way to obtain the Tone Reproduction Curve (TRC) of display devices without the use of a measurement device. Human vision is used to compare a series of dithered color patches against interactively changeable homogeneously colored display areas. Results comparing this method with spectrophotometer measurements are given for three monitors.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 300, "name": "neumann-2004-ipm-image.jpg", "type": "image/jpeg", "size": 8374, "path": "Publication:neumann-2004-ipm", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/neumann-2004-ipm-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/neumann-2004-ipm-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 232, 191, 222, 177, 190 ], "booktitle": "Color Imaging IX: Processing, Hardcopy, and Applications IX", "isbn": "0819451967", "location": "San Jose, California, USA", "organization": "IST&SPIE", "research_areas": [], "keywords": [ "Display Measurement", "Human Visual System" ], "weblinks": [], "files": [ { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 300, "image_height": 300, "name": "neumann-2004-ipm-image.jpg", "type": "image/jpeg", "size": 8374, "path": "Publication:neumann-2004-ipm", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/neumann-2004-ipm-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/neumann-2004-ipm-image:thumb{{size}}.png" }, { "description": null, "filetitle": "Interactive Perception Based Display Characterization", "main_file": true, "use_in_gallery": false, "access": "public", "name": "neumann-2004-ipm-Interactive Perception Based Display Characterization.pdf", "type": "application/pdf", "size": 479599, "path": "Publication:neumann-2004-ipm", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/neumann-2004-ipm-Interactive Perception Based Display Characterization.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/neumann-2004-ipm-Interactive Perception Based Display Characterization:thumb{{size}}.png" } ], "projects_workgroups": [ "realreflect" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-ipm/", "__class": "Publication" }, { "id": "Redey-2004-SRLR", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Self-referencing languages revisited", "date": "2004", "abstract": "Paradoxes, particularly Tarski's liar paradox, represent an ongoing challenge have long attracted special interest. There have been numerous attempts to give either a formal or a more realistic resolution to this area based on natural logical intuition or\ncommon sense. \n\nThe present semantic analysis of the problem components concludes that the traditional language of logic fails to detect Tarski's paradox, since the formalised version of a liar sentence does not represent a correct definition. Neither the formal language, nor the logical system is deficient in this respect. Only natural language statements cannot be interpreted adequately by traditional language of logic. ", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Redey-2004-SRLR-.pdf", "type": "application/pdf", "size": 108117, "path": "Publication:Redey-2004-SRLR", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Redey-2004-SRLR/Redey-2004-SRLR-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Redey-2004-SRLR/Redey-2004-SRLR-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 478, 232 ], "booktitle": "Proceedings of the First Workshop on Philosophy and Informatics (WSPI 2004)", "date_from": "2004-03", "editor": "Büchel, G, Klein, B", "location": "Cologne", "pages_from": "105", "pages_to": "111", "research_areas": [], "keywords": [ "Tarski paradox", "Language of logic" ], "weblinks": [], "files": [ { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Redey-2004-SRLR-.pdf", "type": "application/pdf", "size": 108117, "path": "Publication:Redey-2004-SRLR", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Redey-2004-SRLR/Redey-2004-SRLR-.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Redey-2004-SRLR/Redey-2004-SRLR-:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Redey-2004-SRLR/", "__class": "Publication" }, { "id": "purgathofer-2004-neue", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Neue Methoden für Computergraphik in Echtzeit", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 190 ], "date_from": "2004-05-15", "event": "Erste Österreichische Forschungstage", "location": "Vienna, Austria", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "rend" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/purgathofer-2004-neue/", "__class": "Publication" }, { "id": "groeller-2004-sci", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Scientific Visualization Techniques and Applications", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2004-10-15", "event": "Cyber College/ CSAM Colloquium Series", "location": "Little Rock", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/groeller-2004-sci/", "__class": "Publication" }, { "id": "groeller-2004-imp", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Importance-Driven Image Generation in Scientific Visualization", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2004-11-09", "event": "Informatics Colloquium", "location": "Brno", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/groeller-2004-imp/", "__class": "Publication" }, { "id": "viola-2004-gbf", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "GPU-Based Frequency Domain Volume Rendering", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171 ], "date_from": "2004-04-15", "event": "SCCG", "location": "Budmerice", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "slides", "main_file": false, "use_in_gallery": false, "access": "public", "name": "viola-2004-gbf-slides.ppt", "type": "application/msword", "size": 873472, "path": "Publication:viola-2004-gbf", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/viola-2004-gbf/viola-2004-gbf-slides.ppt", "thumb_image_sizes": [] } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/viola-2004-gbf/", "__class": "Publication" }, { "id": "groeller-2004-efficient", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Efficient Volume Visualization of Large Medical Datasets", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 166 ], "date_from": "2004-09-23", "event": "VRVis Forum", "location": "Wien, Austria", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/groeller-2004-efficient/", "__class": "Publication" }, { "id": "viola-2004-idv", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Importance-Driven Volume Rendering", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 171 ], "date_from": "2004-10-13", "event": "IDVR", "location": "Austin, USA", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "data", "main_file": true, "use_in_gallery": false, "access": "public", "name": "viola-2004-idv-data.zip", "type": "application/x-zip", "size": 17304308, "path": "Publication:viola-2004-idv", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/viola-2004-idv/viola-2004-idv-data.zip", "thumb_image_sizes": [] } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/viola-2004-idv/", "__class": "Publication" }, { "id": "Artusi-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Real time tone Mapping", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 677, "image_height": 325, "name": "Artusi-thesis-image.jpg", "type": "image/jpeg", "size": 31688, "path": "Publication:Artusi-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Artusi-thesis/Artusi-thesis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Artusi-thesis/Artusi-thesis-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 191 ], "date_end": 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Only the eyes were added using 2D image processing.\r\n\r\nThe hat dataset is a distance field computed from a geometric model. The beard has been created by sculpting 3D Perlin noise. The gecko dataset is a X-ray computed tomography scan performed by the University of Veterinary Medicine Vienna.\r\n\r\nNo animals were harmed during the production of this image.\r\nDER WEIHNACHTSGECKO\r\n\r\nDas Bild wurde mit Direct Multi-Volume Rendering einer Szene bestehend aus drei verschiedenen Datensätzen erstellt. Nur die Augen wurden mit 2D Bildverarbeitung hinzugefügt.\r\n\r\nDie Mütze ist ein Distanzfeld, welches aus einem geometrischen Modell berechnet wurde. Der Bart wurde durch Sculpting von 3D Perlin Noise erzeugt. Der Gecko Datensatz ist eine Röntgencomputertomographie-Aufnahme, die von der Veterinärmedizinische Universität Wien durchgeführt wurde.\r\n\r\nBei der Erstellung dieses Bildes wurden keine Tiere verletzt.", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2096, "image_height": 1538, "name": "xmas-2004-image.jpg", "type": "image/jpeg", "size": 287354, "path": "Publication:xmas-2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/xmas-2004-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/xmas-2004-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 161 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "card", "main_file": false, "use_in_gallery": false, "access": "public", "name": "xmas-2004-card.pdf", "type": "application/pdf", "size": 3016739, "path": "Publication:xmas-2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/xmas-2004-card.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/xmas-2004-card:thumb{{size}}.png" }, { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 2096, "image_height": 1538, "name": "xmas-2004-image.jpg", "type": "image/jpeg", "size": 287354, "path": "Publication:xmas-2004", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/xmas-2004-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/xmas-2004-image:thumb{{size}}.png" } ], "projects_workgroups": [ "xmas" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/xmas-2004/", "__class": "Publication" }, { "id": "zotti-2004-stein", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Steinzeitliche Kreisgrabenanlagen in Niederösterreich", "date": "2004", "abstract": "Die Untersuchung der Tor-Orientierung von 28 jungsteinzeitlichen Kreisgrabenanlagen (4800-4500 v.Chr.) ergab durchwegs Ausrichtungen zu bestimmten Auf- und Untergangspunkten der Sonne (z.B. Sonnwenden) und 4 ausgewählter Sterne, denen kalendarische Bedeutung zuzuordnen ist. ", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 222 ], "date_from": "2004-12-04", "event": "5. 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"thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Hadwiger-thesis/Hadwiger-thesis-pdf:thumb{{size}}.png" } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Hadwiger-thesis/", "__class": "Publication" }, { "id": "neumann-2004-aip", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "aIPBMfCoDD", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 232 ], "date_from": "2004-01-15", "event": "?", "location": "San Jose", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "slides", "main_file": true, "use_in_gallery": false, "access": "public", "name": "neumann-2004-aip-slides.ppt", "type": "application/msword", "size": 524800, "path": "Publication:neumann-2004-aip", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-aip/neumann-2004-aip-slides.ppt", "thumb_image_sizes": [] } ], "projects_workgroups": [ "realreflect" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/neumann-2004-aip/", "__class": "Publication" }, { "id": "haidacher-2004-FVV", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Merkmals-Visualisierung für Volumsdaten", "date": "2004", "abstract": "In diesem Paper werden Methoden vorgestellt, welche das Direct Volume Rendering (DVR) unterstutzen. Sie sollen vor allem dazu dienen, innere Strukturen und wichtige Details besser darzustellen. Die Methode Depth of Field adaptiert den Effekt der Tiefenunscharfe aus der Fotographie fur die Volumsvisualisierung. Der Fokusbereich wird dabei scharf dargestellt und je nach Entfernung in Blickrichtung vom Fokuspunkt und Linsenstarke, wird der jeweilige Bereich unscharfer dargestellt. Die Methode fuhrt dazu, dass der Benutzer schneller auf die wichtigen Teile des Datensatzes hingewiesen wird.\n\nDie weiteren Methoden beschaftigen sich mit der Darstellung der inneren Struktur von Objekten. Die Methode\ndes Focus+Context teilt dabei den Datensatz in einen Fokus und einen Kontextbereich. Objektteile, welche im Fokusbereich liegen, werden mittels DVR und den dazugehorigen Transferfunktionen gerendert. Der Rest\n wird mit einer nicht photorealistischen Methode gerendert, welche nur die Umrisse der Objekte darstellt. Bei 3D Dithering wird der Inhalt von gleichmaßig verteilten Wurfeln mit den vorgegebenen Transferfunktionen gerendert und vom dazwischen liegendem Rest werden nur die Konturen oder gar nichts dargestellt. Die\n letzte Methode, Magic Lamp, rendert Teile des Objektes mit DVR und den normalen Transferfunktionen nur\n dann, wenn deren Gradient nahezu parallel zu einer einstellbaren Richtung ist. Die restlichen Teile des\n Objekts werden wieder nur durch ihre Konturen dargestellt.\n\nhttp://www.cg.tuwien.ac.at/courses/projekte_old/vis/finished/MHaidacher/index.html", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 313, "image_height": 205, "name": "haidacher-2004-FVV-.jpg", "type": "image/jpeg", "size": 54397, "path": "Publication:haidacher-2004-FVV", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/haidacher-2004-FVV/haidacher-2004-FVV-.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/haidacher-2004-FVV/haidacher-2004-FVV-:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 597 ], "supervisor": [ 171 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": null, "filetitle": "", 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"Publication" }, { "id": "Neum04GCM", "type_id": "inproceedings", "tu_id": null, "repositum_id": null, "title": "Gamut Clipping and Mapping based on Coloroid System", "date": "2004", "abstract": "The paper presents novel techniques based on the Coloroid color system which hitherto has not been applied to gamut mapping. The introduced methods described are hue preserving and use three gravity centers in a hue-dependent way. Two of the gravity centers are shifted toward the direction of ‘negative saturation’, and can be used for regions of bright and dark colors, while a third gravity center is used for saturated colors. \r\nAfter a short survey of gamut mapping an introduction to the Coloroid describes concisely its features and formulas. Then a simple color clipping rule is presented applicable to any rendering applications. A gamut mapping method will be defined mapping from a generic input image to an RGB display. Other variations of the method describe RGB-CYMK transformation and also cross-media mapping for known input and output gamut boundaries. \r\nThe introduced methods apply hue and chroma dependent lightness compression. They can be applied in realistic computer graphics and digital photography as well as in printing technologies. They are straightforward to implement and have low computational costs.", "authors_et_al": false, "substitute": null, "main_image": { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 600, "image_height": 600, "name": "Neum04GCM-image.jpg", "type": "image/jpeg", "size": 93650, "path": "Publication:Neum04GCM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/Neum04GCM-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/Neum04GCM-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 177, 232 ], "booktitle": "Proceedings of Second European Conference on Colour in Graphics, Imaging and Vision", "pages_from": "548", "pages_to": "555", "research_areas": [], "keywords": [ "Coloroid Color System", "Gamut Clipping", "Gamut Mapping", "Human Perception" ], "weblinks": [], "files": [ { "description": null, "filetitle": "Gamut Clipping and Mapping", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Neum04GCM-Gamut Clipping and Mapping.pdf", "type": "application/pdf", "size": 434136, "path": "Publication:Neum04GCM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/Neum04GCM-Gamut Clipping and Mapping.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/Neum04GCM-Gamut Clipping and Mapping:thumb{{size}}.png" }, { "description": null, "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 600, "image_height": 600, "name": "Neum04GCM-image.jpg", "type": "image/jpeg", "size": 93650, "path": "Publication:Neum04GCM", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/Neum04GCM-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/Neum04GCM-image:thumb{{size}}.png" } ], "projects_workgroups": [ "realreflect" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Neum04GCM/", "__class": "Publication" }, { "id": "meseth-2004-hqr", "type_id": "misc", "tu_id": null, "repositum_id": null, "title": "High Quality Rendering of Reflectance Data", "date": "2004", "abstract": "The tutorial will introduce the basic terminology, show techniques for acquisition of reflectance properties of both synthetic and real-world materials, present common representations for reflectance properties and will elaborate on rendering techniques both for real-time and offline applications. While the tutorial gives an overview over existing techniques for most aspects, selected topics will be described in much more detail.\r\nIn addition to describing acquisition, storage and rendering of reflectance properties, related areas will be covered. In fact, texturing and parameterization, texture- and BTF synthesis and tone mapping represent techniques which are inevitable to achieve really photorealistic results and are therefore required by every system that aims at using reflectance properties. Here, as well, an overview over the research areas will be given, existing techniques will de described and selected topics will be elaborated on in more detail.\r\n", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 698, 701, 699, 697, 191, 192, 222, 700, 190 ], "note": "Tutorial auf CGI 2004", "research_areas": [], "keywords": [], "weblinks": [], "files": [], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/meseth-2004-hqr/", "__class": "Publication" }, { "id": "Kanitsar-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Curved Planar Reformation for Vessel Visualization", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 424, "image_height": 330, "name": "Kanitsar-thesis-image.jpg", "type": "image/jpeg", "size": 49132, "path": "Publication:Kanitsar-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/Kanitsar-thesis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/Kanitsar-thesis-image:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 162 ], "date_end": "2004-01", "date_start": "2001-03", "supervisor": [ 166 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "image", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 424, "image_height": 330, "name": "Kanitsar-thesis-image.jpg", "type": "image/jpeg", "size": 49132, "path": "Publication:Kanitsar-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/Kanitsar-thesis-image.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/Kanitsar-thesis-image:thumb{{size}}.png" }, { "description": "", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Kanitsar-thesis-pdf.pdf", "type": "application/pdf", "size": 14168623, "path": "Publication:Kanitsar-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/Kanitsar-thesis-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/Kanitsar-thesis-pdf:thumb{{size}}.png" } ], "projects_workgroups": [ "ADAPT" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kanitsar-thesis/", "__class": "Publication" }, { "id": "Kleber-2004-TFE", "type_id": "studentproject", "tu_id": null, "repositum_id": null, "title": "Transfer-Function Editor mit erweiterteten Möglichkeiten", "date": "2004", "abstract": " Das Programm \"TF-Editor\" ermöglicht ein 'Direct Volume Rendering' von Volums-Datensätzen, wobei zwei unterschiedliche Dateiformate unterstützt werden.\r\n\r\nDer Benutzer kann anhand zweier möglicher Darstellungsarten Transfer-Functions definieren, und anhand dieser die Datensätze rendern. Weiters gibt es noch die Möglichkeit anhand einer Kugel auf dessen Oberfläche die Häufigkeit der Gradienten mittels Color Mapping aufgetragen wird, jene Gradienten auszuwählen, die gerendert werden sollen. Zusätzlich gibt es noch die Möglichkeit, die Länge der selektierten Gradienten festzulegen (Im Bild nicht sichtbar). Dadurch kann zb ein Rauschen entfernt werden. Die einzelnen Funktionen des Programms werden im Benutzerhandbuch genau erklärt. \r\n\r\nhttp://www.cg.tuwien.ac.at/courses/projekte_old/vis/finished/FKleber/index.html", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "picture", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 818, "image_height": 427, "name": "Kleber-2004-TFE-picture.jpg", "type": "image/jpeg", "size": 61204, "path": "Publication:Kleber-2004-TFE", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-picture.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-picture:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 601 ], "supervisor": [ 179 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "handbook", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Kleber-2004-TFE-handbook.pdf", "type": "application/pdf", "size": 101401, "path": "Publication:Kleber-2004-TFE", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-handbook.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-handbook:thumb{{size}}.png" }, { "description": "", "filetitle": "paper", "main_file": false, "use_in_gallery": false, "access": "public", "name": "Kleber-2004-TFE-paper.pdf", "type": "application/pdf", "size": 324644, "path": "Publication:Kleber-2004-TFE", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-paper.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-paper:thumb{{size}}.png" }, { "description": "", "filetitle": "picture", "main_file": false, "use_in_gallery": true, "access": "public", "image_width": 818, "image_height": 427, "name": "Kleber-2004-TFE-picture.jpg", "type": "image/jpeg", "size": 61204, "path": "Publication:Kleber-2004-TFE", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-picture.jpg", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/Kleber-2004-TFE-picture:thumb{{size}}.png" } ], "projects_workgroups": [ "vis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Kleber-2004-TFE/", "__class": "Publication" }, { "id": "Laramee-2004-thesis", "type_id": "phdthesis", "tu_id": null, "repositum_id": null, "title": "Interactive 3D Flow Visualization Based on Textures and Geometric Primitives", "date": "2004", "abstract": "This thesis presents research in the area of flow visualization. The theoretical framework is based on the notion that flow visualization methodology can be classified into four main areas: direct, geometric, texture-based, and feature-based flow visualization. Our work focuses on the direct, geometric, and texture-based categories, with special emphasis on texture-based approaches.\r\n\r\nAfter presenting the state-of-the-art, we discuss a technique for resampling of CFD simulation data. The resampling tool addresses both the perceptual problems resulting from a brute force hedgehog visualization and flow field coverage problems. These challenges are handled by giving the user control of the resolution of the resampling grid in object space and giving the user precise control of where to place the vector glyphs.\r\n\r\nAfterward, we present a novel technique for visualization of unsteady flow on surfaces from computational fluid dynamics. The method generates dense representations of time-dependent vector fields with high spatio-temporal correlation. While the 3D vector fields are associated with arbitrary triangular surface meshes, the generation and advection of texture properties is confined to image space. Frame rates of up to 60 frames per second are realized by exploiting graphics card hardware. We apply this algorithm to unsteady flow on boundary surfaces of, large, complex meshes from computational fluid dynamics composed of more than 200,000 polygons, dynamic meshes with time-dependent geometry and topology, as well as medical data. We also apply texture-based flow visualization techniques to isosurfaces. The result is a combination of two well known scientific visualization techniques, namely iso-surfacing and texture-based flow visualization, into a useful hybrid approach.\r\n\r\nNext we describe our collection of geometric flow visualization techniques including oriented streamlines, streamlets, a streamrunner tool, streamcomets, and a real-time animated streamline technique. We place special emphasis on necessary measures required in order for geometric techniques to be applicable to real-world data sets.\r\n\r\nIn order to demonstrate the use of all techniques, we apply our direct, geometric, and texture-based flow visualization techniques to investigate swirl and tumble motion, two flow patterns found commonly in computational fluid dynamics (CFD). Our work presents a visual analysis of these motions across three spatial domains: 2D slices, 2.5D surfaces, and 3D. ", "authors_et_al": false, "substitute": null, "main_image": { "description": "", "filetitle": "thesis-cover", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 587, "image_height": 605, "name": "Laramee-2004-thesis-thesis-cover.png", "type": "image/png", "size": 658381, "path": "Publication:Laramee-2004-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/Laramee-2004-thesis-thesis-cover.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/Laramee-2004-thesis-thesis-cover:thumb{{size}}.png" }, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 221 ], "date_end": "2004-12", "date_start": "2001-07", "supervisor": [ 176 ], "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "pdf", "main_file": true, "use_in_gallery": false, "access": "public", "name": "Laramee-2004-thesis-pdf.pdf", "type": "application/pdf", "size": 43104438, "path": "Publication:Laramee-2004-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/Laramee-2004-thesis-pdf.pdf", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/Laramee-2004-thesis-pdf:thumb{{size}}.png" }, { "description": "", "filetitle": "thesis-cover", "main_file": false, "use_in_gallery": false, "access": "public", "image_width": 587, "image_height": 605, "name": "Laramee-2004-thesis-thesis-cover.png", "type": "image/png", "size": 658381, "path": "Publication:Laramee-2004-thesis", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/Laramee-2004-thesis-thesis-cover.png", "thumb_image_sizes": [ 16, 64, 100, 175, 300, 600 ], "thumb_url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/Laramee-2004-thesis-thesis-cover:thumb{{size}}.png" } ], "projects_workgroups": [ "VRVis" ], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/Laramee-2004-thesis/", "__class": "Publication" }, { "id": "knapp-2004-fic", "type_id": "talk", "tu_id": null, "repositum_id": null, "title": "Final contours", "date": "2004", "abstract": "", "authors_et_al": false, "substitute": null, "main_image": null, "sync_repositum_override": null, "repositum_presentation_id": null, "authors": [ 172 ], "date_from": "2004-01-15", "event": "ES WSCG talk", "location": "Plzen", "research_areas": [], "keywords": [], "weblinks": [], "files": [ { "description": "", "filetitle": "slides", "main_file": false, "use_in_gallery": false, "access": "public", "name": "knapp-2004-fic-slides.ppt", "type": "application/msword", "size": 5884416, "path": "Publication:knapp-2004-fic", "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-fic/knapp-2004-fic-slides.ppt", "thumb_image_sizes": [] } ], "projects_workgroups": [], "url": "https://www.cg.tuwien.ac.at/research/publications/2004/knapp-2004-fic/", "__class": "Publication" } ]