Improved variance shadow maps based on non-linear wrapping

Residential College	false
Status	已發表Published
	Improved variance shadow maps based on non-linear wrapping
	Lv W.1; Liu X.1; Wu E.1
	2008-12-01
Source Publication	Journal of Information and Computational Science
ISSN	15487741
Volume	5 Issue:6 Pages:2415-2421
Abstract	Variance shadow maps algorithm reduces aliasing by pre-filtering the depth texture from which an occlusion probability up-bound is computed. But for scenes with high depth complexity this method is unable to correctly describe the visibilities and can bring on light area in shadow regions which is called light bleeding. This paper presents a method to reduce the light bleeding problem by computing two occlusion probability up-bounds. One is the origin variance shadow maps bound and the other bound is got by the wrapped depth value which is mapped by a non-linear high order power function. During rendering, we take the minimum of the two bounds. Results show that this method can reduce both light bleeding which is introduced by variance shadow map and the shadow edge discontinuity problem which is caused by the wrapped method. © 2008 Binary Information Press December 2008.
Keyword	Anti-aliasing Shadow maps Variance shadow maps
URL	View the original
Language	英語English
Fulltext Access	View Full-Text via Scopus
Document Type	Journal article
Collection	University of Macau
Affiliation	1.Institute of Software Chinese Academy of Sciences 2.Universidade de Macau 3.University of Chinese Academy of Sciences
Recommended Citation GB/T 7714	Lv W.,Liu X.,Wu E.. Improved variance shadow maps based on non-linear wrapping[J]. Journal of Information and Computational Science, 2008, 5(6), 2415-2421.
APA	Lv W.., Liu X.., & Wu E. (2008). Improved variance shadow maps based on non-linear wrapping. Journal of Information and Computational Science, 5(6), 2415-2421.
MLA	Lv W.,et al."Improved variance shadow maps based on non-linear wrapping".Journal of Information and Computational Science 5.6(2008):2415-2421.

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