| 摘要: |
| 基于可见性避免了对不可见体元的合成操作,是提高体绘制速度的有效方法.为此提出了一种方法,根据体元基于体元面的相邻性及累积非透明度没有饱和的像素来挑选体元进行处理.这使得投影成像方法能有效地避免处理不可见体元.该方法不仅适用于平行投影和透视投影的成像运算,而且能处理各种规则场和非规则场. |
| 关键词: 可见性 色彩合成 投影 体绘制 科学计算可视化. |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(69903009);Research Grant of University of Macau基金资助项目(RG009/99-00S/WEH/FST) |
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| Projective Volume Rendering by Selecting Voxels Based on Visibility |
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WANG Wen cheng,WEI Li ping,WU En hua
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| Abstract: |
| It is efficient to accelerate volume rendering by avoiding compositing invisible voxels. As for this, a method is proposed in this paper to select voxels to render by the neighboring relation between voxels and the accumulated opacity at pixels, which can efficiently exclude invisible voxels in the rendering process. This method is suitable for both parallel and perspective projections, and it can treat both regular and irregular volumes. |
| Key words: visibility color composition projection volume rendering scientific visualization |
