Importance sampling for volumetric illumination of flames

doi:10.1016/j.cag.2011.01.001

CORC > 计算技术研究所 > 中国科学院计算技术研究所 > 中国科学院计算技术研究所期刊论文 > 英文

	Importance sampling for volumetric illumination of flames
	Zhang, Yingping 1,2; Zhu, Dengming 2; Qiu, Xianjie 2; Wang, Zhaoqi 2
刊名	COMPUTERS & GRAPHICS-UK
	2011-04-01
卷号	35 期号:2 页码:312-319
关键词	Volumetric illumination Effective radiance Effective mean radiance Clustering Importance sampling
ISSN号	0097-8493
DOI	10.1016/j.cag.2011.01.001
英文摘要	Physically based rendering of scenes with volumetric illumination of flames remains a challenging problem due to the complexity of their heterogeneous radiative properties. Current bidirectional importance sampling strategies have been focusing on emissive light sources without anisotropic extinction. In this paper, we present an efficient importance sampling method for volumetric light sources with anisotropic extinction. According to the radiative properties of flames, we separate the computation of anisotropic extinction from the evaluation of illumination inside flames and utilize cluster-based hierarchies to rapidly estimate them. To exploit the coherence of radiative voxels, we also propose a new similarity metric to aggregate voxels into clusters. For each pixel to be shaded, we use these clusters to rapidly approximate the importance function of voxels, and draw final illumination samples from clusters. Our results show that this approach substantially reduces the variance of images when rendering scenes with flames. (C) 2011 Elsevier Ltd. All rights reserved.
资助项目	National Key Technology RD Program[2008BAI50B07] ; NSFC-Guangdong[U0935003]
WOS研究方向	Computer Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000289395900015
内容类型	期刊论文
源URL	[http://119.78.100.204/handle/2XEOYT63/12909]
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Zhang, Yingping
作者单位	1.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China 2.Chinese Acad Sci, Inst Comp Technol, Virtual Real Lab, Beijing 100864, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yingping,Zhu, Dengming,Qiu, Xianjie,et al. Importance sampling for volumetric illumination of flames[J]. COMPUTERS & GRAPHICS-UK,2011,35(2):312-319.
APA	Zhang, Yingping,Zhu, Dengming,Qiu, Xianjie,&Wang, Zhaoqi.(2011).Importance sampling for volumetric illumination of flames.COMPUTERS & GRAPHICS-UK,35(2),312-319.
MLA	Zhang, Yingping,et al."Importance sampling for volumetric illumination of flames".COMPUTERS & GRAPHICS-UK 35.2(2011):312-319.