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ACM Transactions on Graphics (TOG), Volume 26 Issue 2, June 07

Distinctive regions of 3D surfaces
Philip Shilane, Thomas Funkhouser
Article No.: 7
DOI: 10.1145/1243980.1243981

Selecting the most important regions of a surface is useful for shape matching and a variety of applications in computer graphics and geometric modeling. While previous research has analyzed geometric properties of meshes in isolation, we select...

Natural shadow matting
Heung-Yeung Shum, Tai-Pang Wu, Chi-Keung Tang, Michael S. Brown
Article No.: 8
DOI: 10.1145/1243980.1243982

This article addresses the problem of natural shadow matting, the removal or extraction of natural shadows from a single image. Because textures are maintained in the shadowless image after the extraction process, our approach produces some...

Lighting with paint
Adam Finkelstein, R. Keith Morley, Frank Battaglia, Fabio Pellacini
Article No.: 9
DOI: 10.1145/1243980.1243983

Lighting is a fundamental aspect of computer cinematography that involves the placement and configuration of lights to establish mood and enhance storytelling. This process is labor intensive as artists repeatedly adjust the parameters of a large...

Adaptive sampling of reflectance fields
Hans-Peter Seidel, Volker Blanz, Martin Fuchs, Hendrik P.A. Lensch
Article No.: 10
DOI: 10.1145/1243980.1243984

Image-based relighting achieves high quality in rendering, but it requires a large number of measurements of the reflectance field. This article discusses sampling techniques that improve on the trade-offs between measurement effort and...

Volume illustration using wang cubes
David S. Ebert, Benjamin Mora, Martin Kraus, Wei Qiao, Aidong Lu
Article No.: 11
DOI: 10.1145/1243980.1243985

To create a new, flexible system for volume illustration, we have explored the use of Wang Cubes, the 3D extension of 2D Wang Tiles. We use small sets of Wang Cubes to generate a large variety of nonperiodic illustrative 3D patterns and texture,...

Velocity-based shock propagation for multibody dynamics animation
Kenny Erleben
Article No.: 12
DOI: 10.1145/1243980.1243986

Multibody dynamics are used in interactive and real-time applications, ranging from computer games to virtual prototyping, and engineering. All these areas strive towards faster and larger scale simulations. Particularly challenging are...