Volume decimation of irregular tetrahedral grids

被引:0
|
作者
Van Gelder, A [1 ]
Verma, V [1 ]
Wilhelms, J [1 ]
机构
[1] Univ Calif Santa Cruz, Dept Comp Sci, Santa Cruz, CA 95064 USA
来源
COMPUTER GRAPHICS INTERNATIONAL, PROCEEDINGS | 1999年
关键词
computer graphics; scientific visualization; direct volume rendering; decimation; level-of-detail; irregular grids;
D O I
暂无
中图分类号
TP31 [计算机软件];
学科分类号
081202 ; 0835 ;
摘要
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-derail 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 renderer used.
引用
收藏
页码:222 / +
页数:10
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