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检索条件"机构=Science and Technology Center for Computer Graphics and Scientific Visualization"

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Punctuated simplification of man-made objects

Punctuated simplification of man-made objects

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作者： Jang, Justin Wonka, Peter Ribarsky, William Shaw, Christopher D. Georgia Institute of Technology GVU Center College of Computing Atlanta GA 30332 United States Arizona State University PRISM Dept. of Computer Science and Engineering Tempe AZ 85287 United States UNC Charlotte CS Dept. Charlotte Visualization Center Charlotte NC 28223 United States Simon Fraser University Surrey School of Interactive Arts and Technology 14-660 Central City Tower 13450 102 Ave Surrey BC V3T 5X3 Canada Graphics Visualization and Usability Center Georgia Institute of Technology PRISM Lab. ASU Department of Information Technology UNC Charlotte Charlotte Visualization Center IEEE Visualization and Graphics Technical Committee School of Interactive Arts and Technology Simon Fraser University Surrey

We present a simplification algorithm for manifold polygonal meshes of plane-dominant models. Models of this type are likely to appear in man-made environments. While traditional simplification algorithms focus on generality and smooth meshes, the approach presented here considers a specific class of man-made models. By detecting and classifying edge loops on the mesh and providing a guided series of binary mesh partitions, our approach generates a series of simplified models, each of which better respects the semantics of these kinds of models than conventional approaches do. A guiding principle is to eliminate simplifications that do not make sense in constructed environments. This, coupled with the concept of "punctuated simplification", leads to an approach that is both efficient and delivers high visual quality. Comparative results are given.

关键词： Object oriented programming

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SQUEEZE: fast and progressive decompression of triangle meshes

SQUEEZE: fast and progressive decompression of triangle mesh...

引用

computer graphics International

作者： R. Pajarola J. Rossignac Information & Computer Science University of California Irvine USA Graphics Visualization & Usability Center College of Computing Georgia Institute of Technology USA

An ideal triangle mesh compression technology would simultaneously support the following objectives: (1) progressive refinements of the received mesh during decompression, (2) nearly optimal compression ratios for both geometry and connectivity, and (3) in-line, real-time decompression algorithms for hardware or software implementations. Because these three objectives impose contradictory constraints, previously reported efforts have focused primarily on one (sometimes two) of these objectives. The SQUEEZE technique introduced in this paper addresses all three constraints simultaneously, and attempts to provide the best possible compromise. For a mesh of T triangles, SQUEEZE compresses the connectivity to 3.7T bits, which is competitive with the best progressive compression techniques reported so far. The geometric prediction error encoding technique introduced in this paper leads to a geometry compression that is improved by 20% over that of previous schemes. Our initial implementation on a 300-MHz CPU achieved a decompression rate of up to 46,000 triangles per second. SQUEEZE downloads a model through a number of successive refinement stages, providing the benefit of progressivity.

关键词： Hardware Encoding Bandwidth Geometry Image coding Shape Solid modeling computer science computer graphics visualization

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Illustrative visualization

Illustrative visualization

引用

VIS 05: IEEE visualization 2005, Proceedings

作者： Viola, Ivan Gröller, Meister E. Hadwiger, Markus Bühler, Katja Preim, Bernhard Sousa, Mario Costa Ebert, David S. Stredney, Don Kanitsar, Armin Bruckner, Stefan Grimm, Sören Svakhine, Nikolai A. Jang, Yun Gaithert, Kelly Tietjen, Christian Krüger, Arno Peitgen, Heinz-Otto Isenberg, Tobias Hintze, Jana Hertel, Ilka Strauß, Gero Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Department of Simulation and Graphics University of Magdeburg Germany Department of Computer Science University of Calgary Canada School of Electrical and Computer Engineering Purdue University United States Ohio Supercomputer Center United States Institute of Computer Graphics and Algorithms Vienna University of Technology Austria VRVis Research Center Vienna Austria Electrical and Computer Engineering Purdue University United States IEEE Austria Department of Computer Science University of Calgary Canada Department of Computer Science Computer Graphics Research Lab. University of Calgary Canada Purdue University United States Ohio Supercomputer Center United States University of Texas Austin United States Interface Laboratory United States Biomedical Applications United States Department of Simulation and Graphics Otto-von-Guericke-University of Magdeburg Germany Otto-von-Guericke-University of Magdeburg FIN/ISG Germany Institute for Simulation and Graphics Department for Computer Science Otto-von-Guericke-University of Magdeburg Universitaetsplatz 2 39106 Magdeburg Germany Center for Medical Diagnosic Systems and Visualization Universitaetsallee 29 28359 Bremen Germany Department of Simulation and Graphics Otto-von-Guericke University of Magdeburg Germany ENT Department University Hospital of Leipzig Germany

ISBN: (纸本)0780394623

The tutorial presents state-of-the-art visualization techniques inspired by traditional technical and medical illustrations. Such techniques exploit the perception of the human visual system and provide effective visual abstractions to make the visualization clearly understandable. Visual emphasis and abstraction has been used for expressive presentation from prehistoric paintings to nowadays scientific and medical illustrations. Many of the expressive techniques used in art are adopted in computer graphics, and are denoted as illustrative or non-photorealistic rendering. Different stroke techniques, or brush properties express a particular level of abstraction. Feature emphasis or feature suppression is achieved by combining different abstraction levels in illustrative rendering. Challenges in visualization research are very large data visualization as well as multi-dimensional data visualization. To effectively convey the most important visual information there is a significant need for visual abstraction. For less relevant information the dedicated image space is reduced to enhance more prominent features. The discussed techniques in the context of scientific visualization are based on iso-surfaces and volume rendering. Apart from visual abstraction, i.e., illustrative representation, the visibility of prominent features can be achieved by illustrative visualization techniques such as cut-away views or ghosted views. The structures that occlude the most prominent information are suppressed in order to clearly see more interesting parts. A different smart way to provide information on the data is using exploded views or other types of deformation. Furthermore intuitive feature classification via 3D painting and manipulation with the classified data including label placement is presented. Discussed non-photorealistic and illustrative techniques from visualization and graphics are shown from the perspective as tools for illustrators from medicine, botany, archeology

关键词： visualization

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Automating interface evaluation 94

Automating interface evaluation

引用

Conference Companion on Human Factors in Computing Systems

作者： Michael D. Byrne D. Wood Piyawadee Sukaviriya James D. Foley David Kieras Graphics Visualization and Usabitity Center Georgia Institute of Technology Atlanta GA Electrical Engineering and Computer Science Department University of Michigan Ann Arbor MI

No abstract available.

ISBN: (纸本)9780897916516

No abstract available.

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Head-tracked orbital viewing: an interaction technique for immersive virtual environments 96

Head-tracked orbital viewing: an interaction technique for i...

引用

Proceedings of the 9th annual ACM symposium on User interface software and technology

作者： David R. Koller Mark R. Mine Scott E. Hudson Graphics Visualization & Usability Center College of Comuputing Georgia Institute of Technology Atlanta GA Department of Computer Science University of North Carolira Chapel Hill NC

No abstract available.

ISBN: (纸本)9780897917988

No abstract available.

关键词： interaction metaphors head-tracking viewpoint selection steering virtual environments

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Integrating visualization support into distributed computing systems

Integrating visualization support into distributed computing...

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International Conference on Distributed Computing Systems

作者： B. Topol J.T. Stasko V. Sunderam Graphics Visualization and Usability Center College of Computing Georgia Institute of Technology Atlanta GA USA Department of Math and computer Science Emory University Atlanta GA USA

visualization and animation tools may become extremely important aids in the understanding, verification, and performance tuning of parallel computations. Presently, however, the use of visualization has had only a limited use for enhancing parallel computation. We hypothesize that one of the primary reasons for the limited use of visualization tools in parallel program development is the difficulty of acquiring the information necessary to drive the visual display. Our approach to this impediment focuses on integrating visualization support directly into a distributed computing system. Central to this integration is the addition of a logical clock that prevents the timestamps of events from violating causality. The implementation requires the "piggybacking" of a negligible amount of extra header information on system messages and the impact on performance is minimal. This results in a system that produces useful visualizations with no extra effort required by the applications programmer. Also integrated into the distributed system is support which simplifies the creation of programmer-defined, application-specific visualizations, unique to each new parallel program developed.

关键词： visualization Distributed computing Concurrent computing Animation Drives Displays Impedance Clocks Programming profession

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CyberDesk: automated integration of desktop and network services 97

CyberDesk: automated integration of desktop and network serv...

引用

Proceedings of the ACM SIGCHI Conference on Human factors in computing systems

作者： Andrew Wood Anind Dey Gregory D. Abowd School of Computer Science The University of Birmingham Edgbaston Birmingham B15 2TT UK Graphics Visualization & Usability Center Georgia Institute of Technology Atlanta GA

No abstract available.

ISBN: (纸本)9780897918022

No abstract available.

关键词： adaptive interfaces

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CyberDesk: a framework for providing self-integrating context-aware services 98

CyberDesk: a framework for providing self-integrating contex...

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Proceedings of the 3rd international conference on Intelligent user interfaces

作者： Anind K. Dey Gregory D. Abowd Andrew Wood Graphics Visualization & Usability Center Georgia Institute of Technology Atlanta GA School of Computer Science The University of Birmingham Edgbaston Birmingham B15 2TT UK

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CyberDesk: a framework for providing self-integrating ubiquitous software services 97

CyberDesk: a framework for providing self-integrating ubiqui...

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Proceedings of the 10th annual ACM symposium on User interface software and technology

作者： Anind K. Dey Gregory Abowd Mike Pinkerton Andrew Wood Graphics Visualization & Usability Center Georgia Institute of Technology Atlanta GA School of Computer Science The University of Birmingham Edgbaston Birmingham B15 2TT UK

No abstract available.

ISBN: (纸本)9780897918817

No abstract available.

关键词： software components future computing environments automated integration adaptive interfaces dynamic integration ubiquitous services context-aware computing

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FluidPlaying: Efficient Adaptive Simulation for Highly Dynamic Fluid

FluidPlaying: Efficient Adaptive Simulation for Highly Dynam...

引用

Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW), IEEE Conference on

作者： Sinuo Liu Xiaojuan Ban Sheng Li Haokai Zeng Xiaokun Wang Yanrui Xu Fei Zhu Guoping Wang Graphics & Interaction Lab National Biomedical Imaging Center School of Computer Science Peking University School of Intelligence Science and Technology University of Science and Technology Beijing Beijing Engineering Technology Research Center of Virtual Simulation and Visualization Peking University Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)

We present FliudPlaying, a novel dynamic level-based spatially adaptive simulation method that can handle highly dynamic fluid efficiently. To capture the subtle detail of the fluid surface, the high-resolution simulation is performed not only at the free surface but also at those regions with high vorticity levels and velocity difference levels. To minimize the density error, an online optimization scheme is used when increasing the resolution by particle splitting. We also proposed a neighbor-based splash enhancement to compensate for the loss of dynamic details. Compared with the high-resolution simulation baseline, our method can achieve over 3× speedups while consuming only less than 10% computational resources. Furthermore, our method can make up for the loss of high-frequency details caused by the spatial adaptation, and provide more realistic dynamics in particle-based fluid simulation.

关键词： Solid modeling Adaptation models Three-dimensional displays Fluid dynamics Computational modeling Conferences Virtual reality

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