Volume rendering for irregular grids with culling effectively occluded cells

Residential College	false
Status	已發表Published
	Volume rendering for irregular grids with culling effectively occluded cells
	Sun W.W.; Wu E.H.
	2001-03-01
Source Publication	Jisuanji Xuebao/Chinese Journal of Computers
ISSN	02544164
Volume	24 Issue:3 Pages:292-295
Abstract	In object-order volume rendering, it is possible that some image area become opaque when some cells are projected. Those cells whose projections are within opaque image area have no contribution to result image. In this paper, an algorithm for culling cells occluded is proposed to accelerate volume rendering for irregular data set. Irregular data set is rendered by incremental slicing. During rendering we use an average opacity buffer by averaging the opacity buffer with a box filter with the size, which equals to the maximum among the distances respectively corresponding to the maximal distance from the gravity of each cell to its vertices, the value of pixel in this average opacity buffer represents the average opacity of all pixels within a neighborhood of the dimensions with the size of box filter. Then, the visibility of each cell can be determined by indexing the value of the gravity projection of the cell in the average opacity buffer. If the value of the gravity projection of a cell in the average opacity buffer equals to 1.0, the cell is fully occluded, accordingly culled, or if partially occluded, accordingly projected. Thus, the amount of data needed to be processed can be reduced and volume rendering is accelerated.
Keyword	Culling Irregular grids Occluded cell Volume rendering
URL	View the original
Language	英語English
Fulltext Access	View Full-Text via Scopus
Document Type	Journal article
Collection	University of Macau
Affiliation	Institute of Software Chinese Academy of Sciences
Recommended Citation GB/T 7714	Sun W.W.,Wu E.H.. Volume rendering for irregular grids with culling effectively occluded cells[J]. Jisuanji Xuebao/Chinese Journal of Computers, 2001, 24(3), 292-295.
APA	Sun W.W.., & Wu E.H. (2001). Volume rendering for irregular grids with culling effectively occluded cells. Jisuanji Xuebao/Chinese Journal of Computers, 24(3), 292-295.
MLA	Sun W.W.,et al."Volume rendering for irregular grids with culling effectively occluded cells".Jisuanji Xuebao/Chinese Journal of Computers 24.3(2001):292-295.

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