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CGI
1999
IEEE

Volume Decimation of Irregular Tetrahedral Grids

10 years 2 months ago
Volume Decimation of Irregular Tetrahedral Grids
Rendering highly complex models can be time and space prohibitive, and decimation is an important tool in providing simplifications. A decimated model may replace the original entirely or provide level-of-detail approximations. Here we present and evaluate, quantitatively and qualitatively, methods for rapidly decimating volumetric data defined on a tetrahedral grid. Results are compared using both direct volume rendering and isosurface rendering. A mass-based and a density-based decimation error metric are compared, and the mass-based metric is found to be superior. Grid surface vertices are decimated using a geometric error metric, as well as one of the data-based error metrics. Images produced using direct volume rendering and isosurface extraction on grids that are decimated approximately 80% are nearly indistinguishable from similar images using the non-decimated grids, and even at 95% decimation, the rendered images have few artifacts. Rendering speed-up depends upon the rendere...
Allen Van Gelder, Vivek Verma, Jane Wilhelms
Added 02 Aug 2010
Updated 02 Aug 2010
Type Conference
Year 1999
Where CGI
Authors Allen Van Gelder, Vivek Verma, Jane Wilhelms
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