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Time-varying clustering for local lighting and material design
HUANG PeiJie1,2; GU YuanTing1,2; WU XiaoLong1,2; CHEN YanYun3; WU EnHua1,2,4
2009-03-01
Source PublicationScience in China, Series F: Information Sciences
ISSN1009-2757
Volume52Issue:3Pages:445-456
Other Abstract

This paper presents an interactive graphics processing unit (GPU)-based relighting system in which local lighting condition, surface materials and viewing direction can all be changed on the fly. To support these changes, we simulate the lighting transportation process at run time, which is normally impractical for interactive use due to its huge computational burden. We greatly alleviate this burden by a hierarchical structure named a transportation tree that clusters similar emitting samples together within a perceptually acceptable error bound. Furthermore, by exploiting the coherence in time as well as in space, we incrementally adjust the clusters rather than computing them from scratch in each frame. With a pre-computed visibility map, we are able to efficiently estimate the indirect illumination in parallel on graphics hardware, by simply summing up the radiance shoots from cluster representatives, plus a small number of operations of merging and splitting on clusters. With relighting based on the time-varying clusters, interactive update of global illumination effects with multi-bounced indirect lighting is demonstrated in applications to material animation and scene decoration. © 2009 Science in China Press and Springer-Verlag GmbH.

KeywordGlobal Illumination Gpu Lighting Design Local Lighting Material Design Photorealistic Image Synthesis Time-varying Clustering
DOIhttps://doi.org/10.1007/s11432-009-0059-z
URLView the original
Indexed BySCI
Language英语
WOS Research AreaComputer Science
WOS SubjectComputer Science, Information Systems
WOS IDWOS:000264106500006
PublisherSCIENCE PRESS, 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
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Cited Times [WOS]:1   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
Affiliation1.State Key Lab of Computer Science, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China;
2.Graduate University of Chinese Academy of Sciences, Beijing 100190, China;
3.Autodesk, Inc., Shanghai 200122, China;
4.Department of Computer and Information Science, University of Macau, Macao
Recommended Citation
GB/T 7714
HUANG PeiJie,GU YuanTing,WU XiaoLong,et al. Time-varying clustering for local lighting and material design[J]. Science in China, Series F: Information Sciences,2009,52(3):445-456.
APA HUANG PeiJie,GU YuanTing,WU XiaoLong,CHEN YanYun,&WU EnHua.(2009).Time-varying clustering for local lighting and material design.Science in China, Series F: Information Sciences,52(3),445-456.
MLA HUANG PeiJie,et al."Time-varying clustering for local lighting and material design".Science in China, Series F: Information Sciences 52.3(2009):445-456.
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