Multiple Scattering Approximation in Heterogeneous Media by Narrow Beam Distributions

Fast realistic rendering of objects in scattering media is still a challenging topic in computer graphics. In presence of participating media, a light beam is repeatedly scattered by media particles, changing direction and getting spread out. Explicitly evaluating this beam distribution would enable...

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Vydáno v:Computer graphics forum Ročník 35; číslo 7; s. 373 - 382
Hlavní autoři: Shinya, Mikio, Dobashi, Yoshinori, Shiraishi, Michio, Kawashima, Motonobu, Nishita, Tomoyuki
Médium: Journal Article
Jazyk:angličtina
Vydáno: Oxford Blackwell Publishing Ltd 01.10.2016
Témata:
Analysis
Approximation
Beams (radiation)
Categories and Subject Descriptors (according to ACM CCS)
Computer graphics
Estimating techniques
Exact solutions
I.3.3 [Computer Graphics]: Picture/Image Generation
Image processing systems
Light
Mathematical analysis
Media
Rendering
Scattering
Studies
ISSN:0167-7055, 1467-8659
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Popis
Shrnutí:Fast realistic rendering of objects in scattering media is still a challenging topic in computer graphics. In presence of participating media, a light beam is repeatedly scattered by media particles, changing direction and getting spread out. Explicitly evaluating this beam distribution would enable efficient simulation of multiple scattering events without involving costly stochastic methods. Narrow beam theory provides explicit equations that approximate light propagation in a narrow incident beam. Based on this theory, we propose a closed‐form distribution function for scattered beams. We successfully apply it to the image synthesis of scenes in which scattering occurs, and show that our proposed estimation method is more accurate than those based on the Wentzel‐Kramers‐Brillouin (WKB) theory.
Bibliografie:Supporting InformationSupporting Information
istex:9524D06D3E393123FCF352D29C450B9B050B9C92
ark:/67375/WNG-J7VJ3480-R
ArticleID:CGF13034
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0167-7055
1467-8659
DOI:10.1111/cgf.13034