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题名	practical hybrid pre-filtering shadow maps
作者	Lv Weiwei ; Liu Xuehui ; Lu Jian ; Wu Enhua
答辩日期	2009
关键词	antialiasing algorithm depth texture exponential shadow map occlusion value prefiltering algorithm variance shadow map antialiasing filtering theory image texture
出版地	345 E 47TH ST, NEW YORK, NY 10017 USA
出版者	2009 11TH IEEE INTERNATIONAL CONFERENCE ON COMPUTER-AIDED DESIGN AND COMPUTER GRAPHICS, PROCEEDINGS
英文摘要	Both exponential shadow maps and variance shadow maps arc efficient shadow maps anti-aliasing algorithms based on pre-filtering, but exponential shadow maps will cause light bleeding, float overflow and penumbra discontinuity problems and variance shadow maps also have serious light bleeding problem. All these prevent their individual use in practice especially in large virtual environment such as games. This paper presents a hybrid method by storing three values in the depth texture: depth, squared depth and exponential depth. From these values we calculate two occlusion values using exponential and variance shadow maps respectively. A minimum of the two occlusion values is taken as the final result. This can efficiently eliminate the problems of the two methods and can be widely used in practice.
公开日期	2011-03-20
资助信息	IEEE, Natl Nat Sci Fdn China, Zhejiang Prov
出处	Proceedings - 2009 11th IEEE International Conference on Computer-Aided Design and Computer Graphics, CAD/Graphics 2009
内容类型	学位论文
源URL	[http://124.16.136.157/handle/311060/8238]
专题	软件研究所_计算机科学国家重点实验室 _学位论文
推荐引用方式 GB/T 7714	Lv Weiwei,Liu Xuehui,Lu Jian,et al. practical hybrid pre-filtering shadow maps[D]. 2009.

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