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  Global Illumination using Photon Ray Splatting

Herzog, R., Havran, V., Kinuwaki, S., Myszkowski, K., & Seidel, H.-P. (2007). Global Illumination using Photon Ray Splatting. In D. Cohen-Or, & P. Slavik (Eds.), Eurographics 2007 (pp. 503-513). Oxford, UK: Blackwell.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1F5A-F Version Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1F5B-D
Genre: Conference Paper

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 Creators:
Herzog, Robert1, 2, Author           
Havran, Vlastimil1, Author           
Kinuwaki, Shinichi1, Author           
Myszkowski, Karol1, Author           
Seidel, Hans-Peter1, Author           
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1Computer Graphics, MPI for Informatics, Max Planck Society, ou_40047              
2International Max Planck Research School, MPI for Informatics, Max Planck Society, ou_1116551              

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 Abstract: We present a novel framework for efficiently computing the indirect illumination in diffuse and moderately glossy scenes using density estimation techniques. Many existing global illumination approaches either quickly compute an overly approximate solution or perform an orders of magnitude slower computation to obtain high-quality results for the indirect illumination. The proposed method improves photon density estimation and leads to significantly better visual quality in particular for complex geometry, while only slightly increasing the computation time. We perform direct splatting of photon rays, which allows us to use simpler search data structures. Since our density estimation is carried out in ray space rather than on surfaces, as in the commonly used photon mapping algorithm, the results are more robust against geometrically incurred sources of bias. This holds also in combination with final gathering where photon mapping often overestimates the illumination near concave geometric features. In addition, we show that our photon splatting technique can be extended to handle moderately glossy surfaces and can be combined with traditional irradiance caching for sparse sampling and filtering in image space.

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Language(s): eng - English
 Dates: 2008-02-282007
 Publication Status: Issued
 Pages: -
 Publishing info: Oxford, UK : Blackwell
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 356513
Other: Local-ID: C12573CC004A8E26-922F7B2EB5B8D78CC12573C4004C5B93-HerzogEG2007
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Title: Untitled Event
Place of Event: Prague, Czech Republic
Start-/End Date: 2007-09-03 - 2007-09-07

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Title: Eurographics 2007
Source Genre: Proceedings
 Creator(s):
Cohen-Or, Daniel, Editor
Slavik, Pavel, Editor
Affiliations:
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Publ. Info: Oxford, UK : Blackwell
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 503 - 513 Identifier: -

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Title: Computer Graphics Forum
Source Genre: Series
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0167-7055