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检索条件"任意字段=Proceedings of the 11th Indian Conference on Computer Vision, Graphics and Image Processing"

共 557 条记录，以下是401-410 订阅

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Simulating wax crayons 11

Simulating wax crayons

引用

11th Pacific conference on computer graphics and Applications

作者： Rudolf, D Mould, D Neufeld, E Univ Saskatchewan Dept Comp Sci Saskatoon SK S7N 0W0 Canada

ISBN: (纸本)0769520286

We present a physically-inspired model of wax crayons, which synthesizes drawings from collections of user-specified strokes. Paper is represented by a height-field texture, and a crayon is modelled with a 2D mask that evolves as it interacts with the paper. the amount of wax deposition is computed based on the crayon contact profile, contact force, and friction. Previously deposited wax is smeared by crayon action, based on wax softness and contact information. the distributed wax is rendered using a simplified Kubelka-Monk model, which approximates light transmittance and scattering effects.

关键词： Computational modeling computer science Friction Geometry image processing Light scattering Painting Petroleum Rendering (computer graphics) Shape

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Interactive visualization of complex real-world light sources 11

Interactive visualization of complex real-world light source...

引用

11th Pacific conference on computer graphics and Applications

作者： Granier, X Goesele, M Heidrich, W Seidel, HP Univ British Columbia Vancouver BC V5Z 1M9 Canada

ISBN: (纸本)0769520286

Interactive visualization of complex, real-world light sources has so far not been feasible. In this paper, we present an hardware accelerated direct lighting algorithm based on a recent high quality light source acquisition technique. By introducing an approximate reconstruction of the exact model, a multi-pass rendering approach, and a compact data representation, we are able to achieve interactive frame rates. the method is part of the processing pipeline from light source acquisition to high quality lighting of a virtual world.

关键词： local illumination light source modeling hardware rendering image-based rendering physically-based modeling and acquisition

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Iso-splatting: A point-based alternative to isosurface visualization 11

Iso-splatting: A point-based alternative to isosurface visua...

引用

11th Pacific conference on computer graphics and Applications

作者： Co, CS Hamann, B Joy, KI Univ Calif Davis Dept Comp Sci CIPIC Davis CA 95616 USA

ISBN: (纸本)0769520286

We present a new approach to isosurface visualization that we call "iso-splatting." We use point primitives for representing and rendering isosurfaces. the method consists of two steps. In the first step, point samples are generated throughout the volumetric domain of a scalar function. In the second step, these points are projected onto the isosurface of interest. We render the resulting point set using a surface splatting algorithm. the method can be extended to out-of-core or parallel environments. Our results show that this method can offer much greater time and space efficiency when compared with standard triangle-based methods, thereby supporting higher levels of interactivity. Parts of the algorithm can be accelerated using graphics hardware. One key advantage of this approach is that, since extraction computations are divided into two smaller phases, work can be distributed to exploit all available resources.

关键词： Acceleration Computational geometry computer science Fuels graphics Hardware image processing Isosurfaces Rendering (computer graphics) Visualization

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proceedings - Pacific conference on computer graphics and Applications

Proceedings - Pacific Conference on Computer Graphics and Ap...

引用

11th Pacific conference on computer graphics and Applications, PG 2003

ISBN: (纸本)0769520286

the proceedings contain 61 papers. the topics discussed include: computer graphics in its fifth decade: ferment at the foundations;machine learning for computer graphics: a manifesto and tutorial;freeform shape representations for efficient geometry processing;data-driven computer graphics;lightweight face relighting;efficient rendering of local subsurface scattering;interactive visualization of complex real-world light sources;variance invariant adaptive temporal supersampling for motion blurring;illustration watermarks for vector graphics;interactive modeling of tree bark;skinning Catmull-Clark subdivision surfaces with incompatible cross-sectional curves;dynamic sculpting and deformation of point set surfaces;interactive global and local deformations for virtual clay;a painting interface for interactive surface deformations;and non-photorealistic rendering and content-based image retrieval.

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Database integration and remote accessibility in a distributed vision-based surveillance system 11

Database integration and remote accessibility in a distribut...

引用

11th Euromicro conference on Parallel, Distributed and Network-Based processing

作者： Jorge, P Moreno, DL Sánchez, E Barro, S Univ Santiago de Compostela Dept Elect & Computac Fac Fis Grp Sistemas Intelixentes Santiago De Compostela 15706 Spain

ISBN: (纸本)0769518753

In this paper we present the integration of database and remote accessibility in a distributed surveillance system. We focus on the flexibility and scalability of the system, as well as the design and implementation possibilities of readily available free software components. What is more, we discuss the main issues encountered during the development stage and propose feasible solutions for them.

关键词： computer architecture Connectors Distributed computing Distributed databases Humans image analysis image databases Motion detection Software architecture Surveillance

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Proscenium: A framework for spatio-temporal video editing

Proscenium: A framework for spatio-temporal video editing

引用

2003 Multimedia conference - proceedings of the 11th ACM International conference on Multimedia, MM'03

作者： Bennett, Eric P. McMillan, Leonard University of North Carolina Chapel Hill

We present an approach to video editing where movie sequences are treated as spatio-temporal volumes that can be sheered and warped under user control. this simple capability enables new video editing operations that support complex postproduction modifications, such as object removal and/or changes in camera motion. Our methods do not rely on complicated and error-prone image analysis or computer vision methods. Moreover, they facilitate an editing approach to video that is similar to standard image-editing tasks. Central to our system is a movie representation framework called Proscenium that supports efficient queries and operations on spatio-temporal volumes while maintaining the original source content. We have adopted a graph-based lazy-evaluation model in order to support interactive visualizations, complex data modifications, and efficient processing of large spatio-temporal volumes.

关键词： Video signal processing

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Group theoretical Invariants in Color image processing

Group Theoretical Invariants in Color Image Processing

引用

Final Program and proceedings of the IS and T and SID - 11th Color Imaging conference: Color Science and Engineering:Systems, Technologies, Applications

作者： Lenz, Reiner Tran, Linh Viet Bui, thanh Hai Department of Science and Technology Linköping University SE-60174 Norrköping Sweden

Many image formation processes are complex interactions of several sub-processes and the analysis of the resulting images requires often to separate the influence of these sub-processes. An example is the formation of a color image which depends on the illumination, the properties of the camera and the objects in the scene, the imaging geometry and many other factors. Color constancy algorithms try to separate the influence of the illumination and the remaining factors and are thus typical examples of the general strategy. An important tool used by these methods are invariants ie. features that do not depend on the state of one (or several) of the sub-processes involved. Illumination invariants are thus features that are independent of illumination changes and depend only on the remaining factors such as material and camera properties. We introduce transformation groups as the descriptors of the sub-processes mentioned above. We then show how they can be used to calculate the number of independent invariants for a given class of transformations. We also show that the theory is constructive in the sense that there are symbolic mathematics packages that can find the invariants as solutions to systems of partial differential equations. We illustrate the general theory with applications from color computer vision. We will describe the construction of invariants from the dichromatic and the Kubelka-Munk reflection models in detail. Space does not permit us to describe the detailed derivation of illumination invariants from PCA models of illumination spectra but it can be shown that the construction of the invariants follows the same mathematical procedure.

关键词： Color image processing

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Iso-splatting: a point-based alternative to isosurface visualization

Iso-splatting: a point-based alternative to isosurface visua...

引用

Pacific conference on computer graphics and Applications

作者： C.S. Co B. Hamann K.I. Joy Center for Image Processing and Integrated Computing (CIPIC) Department of Computer Science University of California USA

关键词： Isosurfaces Visualization Rendering (computer graphics) Computational geometry Fuels image processing computer science Acceleration graphics Hardware

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Simulating wax crayons

Simulating wax crayons

引用

Pacific conference on computer graphics and Applications

作者： D. Rudolf D. Mould E. Neufeld Department of Computer Science University of Saskatchewan Canada

We present a physically-inspired model of wax crayons, which synthesizes drawings from collections of user-specified strokes. Paper is represented by a height-field texture, and a crayon is modeled with a 2D mask that evolves as it interacts with the paper. the amount of wax deposition is computed based on the crayon contact profile, contact force, and friction. Previously deposited wax is smeared by crayon action, based on wax softness and contact information. the distributed wax is rendered using a simplified Kubelka-Monk model, which approximates light transmittance and scattering effects.

关键词： Computational modeling Light scattering Shape Rendering (computer graphics) image processing Geometry computer science Friction Petroleum Painting

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Interactive visualization of complex real-world light sources

Interactive visualization of complex real-world light source...

引用

Pacific conference on computer graphics and Applications

作者： X. Granier M. Goesele W. Heidrich H.-P. Seidel University of British Columbia Vancouver Canada MPI Informatik Saarbrucken Germany

Interactive visualization of complex, real-world light sources has so far not been feasible. We present a hardware accelerated direct lighting algorithm based on a recent high quality light source acquisition technique. By introducing an approximate reconstruction of the exact model, a multi-pass rendering approach, and a compact data representation, we are able to achieve interactive frame rates. the method is part of the processing pipeline from light source acquisition to high quality lighting of a virtual world.

关键词： Light sources Data visualization Hardware Rendering (computer graphics) Lighting Optical filters Acceleration image reconstruction Pipelines Optical feedback

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