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dc.contributor.authorSchwenk, Karstenen_US
dc.contributor.authorFellner, Dieter W.en_US
dc.contributor.editorN. Avis and S. Lefebvreen_US
dc.date.accessioned2014-02-06T15:44:02Z
dc.date.available2014-02-06T15:44:02Z
dc.date.issued2011en_US
dc.identifier.issn1017-4656en_US
dc.identifier.urihttp://dx.doi.org/10.2312/EG2011/short/025-028en_US
dc.description.abstractMonte Carlo estimation of direct lighting is often dominated by visibility queries. If an error is tolerable, the calculations can be sped up by using a simple scalar occlusion factor per light source to attenuate radiance, thus decoupling the expensive estimation of visibility from the comparatively cheap sampling of unshadowed radiance and BRDF. In this paper we analyze the error associated with this approximation and derive an upper bound. We demonstrate in a simple relighting application how our result can be used to reduce noise by introducing a controlled error if a reliable estimate of the visibility is already available.en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): Computer Graphics [I.3.7]: Three-Dimensional Graphics and Realismen_US
dc.titleAn Error Bound for Decoupled Visibility with Application to Relightingen_US
dc.description.seriesinformationEurographics 2011 - Short Papersen_US


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