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Computer Graphics
- Simplification and Multiresolution Modeling of Polygonal Surfaces
- Applications of Morse Theory and Catastrophe Theory to Computer Graphics
- Real-Time Procedural Solid Texturing
- Image-based Modeling and Rendering
^ Simplification and Multiresolution Modeling of Polygonal Surfaces
M. Garland*
University of Illinois
Extremely precise polygonal surface models are now widely available, in large part due to advances in scanning technology. Models of this complexity, perhaps several million polygons, frequently contain far more detail than required for the target application. This project is focused on the design and implementation of efficient algorithms for the automatic simplification of highly detailed polygonal surface models into faithful approximations containing fewer polygons. Using such simplification algorithms, researchers can also construct new multiresolution representations for surfaces that allow the application to treat an object at many different levels of detail.
^ Applications of Morse Theory and Catastrophe Theory to Computer Graphics
J. C. Hart,* T. Fleury
Evans-Sutherland Computer Corporation
jch@cs.uiuc.edu
This project investigates techniques for detecting, analyzing, and controlling the topology of shapes during the modeling process.
^ Real-Time Procedural Solid Texturing
J. C. Hart,* N. Carr
Evans-Sutherland Computer Corporation; University of Illinois
jch@cs.uiuc.edu
This project has developed a new technique for simulating the procedural solid textures in real-time on recent consumer graphics cards, thus improving the realism of graphics used for video games, virtual environments, and modeling/animation software. Procedural solid textures simulate the appearance of objects sculpted from wood and stone and are also useful for modeling clouds, water, fire, and planets.
^ Image-based Modeling and Rendering
Y. Yu*
University of Illinois
This research includes image-based modeling and rendering, texture synthesis, detail modeling, and simulation. This work on image-based modeling and rendering tries to extend its manipulability in terms of lighting and scene composition. Work on texture synthesis leads to algorithms for 3-D textures which have both spatially varying height and reflectance. Research on the details focuses on both geometric and appearance models that account for all visual effects introduced by intermediate and microstructure level details. Past research resulted in development of segmentation techniques for organizing points from laser range images into coherent objects and a well-known technique for simultaneously recovering reflectance models of multiple objects from photographs of the objects in a scene that accounts for both the direct illumination of the objects from light sources as well as the indirect illumination from light reflected by neighboring objects. Research extends to investigation of techniques to recover the appearance of complex materials such as skin to make more convincing synthetic pictures of humans.
