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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 (MPI-I-2007-4-007). Saarbrücken, Germany: Max-Planck-Institut für Informatik.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-1F57-6 Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-13B6-4
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 Urheber:
Herzog, Robert1, 2, Autor           
Havran, Vlastimil1, Autor           
Kinuwaki, Shinichi1, Autor           
Myszkowski, Karol1, Autor           
Seidel, Hans-Peter1, Autor           
Affiliations:
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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 Zusammenfassung: We present a novel framework for efficiently computing the indirect illumination in diffuse and moderately glossy scenes using density estimation techniques. A vast majority of existing global illumination approaches either quickly computes an approximate solution, which may not be adequate for previews, or performs a much more time-consuming computation to obtain high-quality results for the indirect illumination. Our method improves photon density estimation, which is an approximate solution, 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. Our novel lighting computation is derived from basic radiometric theory and requires only small changes to existing photon splatting approaches. 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 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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Sprache(n): eng - English
 Datum: 2008-03-272007
 Publikationsstatus: Erschienen
 Seiten: 66 p.
 Ort, Verlag, Ausgabe: Saarbrücken, Germany : Max-Planck-Institut für Informatik
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 Identifikatoren: eDoc: 356502
Anderer: Local-ID: C12573CC004A8E26-88919E23BF524D6AC12573C4005B8D41-HerzogReport2007
Reportnr.: MPI-I-2007-4-007
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Titel: Research Report
Genre der Quelle: Reihe
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