Schwenk, Karsten ; Behr, Johannes ; Fellner, Dieter W. (2011)
An Error Bound for Decoupled Visibility with Application to Relighting.
Eurographics 2011. Short Papers.
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
Monte 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.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2011 |
| Autor(en): | Schwenk, Karsten ; Behr, Johannes ; Fellner, Dieter W. |
| Art des Eintrags: | Bibliographie |
| Titel: | An Error Bound for Decoupled Visibility with Application to Relighting |
| Sprache: | Englisch |
| Publikationsjahr: | 2011 |
| Verlag: | Eurographics Association |
| Veranstaltungstitel: | Eurographics 2011. Short Papers |
| Kurzbeschreibung (Abstract): | Monte 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. |
| Freie Schlagworte: | Forschungsgruppe Semantic Models, Immersive Systems (SMIS), Business Field: Virtual engineering, Research Area: Confluence of graphics and vision, 3D Computer graphics, Photorealistic rendering, Lighting |
| Fachbereich(e)/-gebiet(e): | 20 Fachbereich Informatik 20 Fachbereich Informatik > Graphisch-Interaktive Systeme |
| Hinterlegungsdatum: | 12 Nov 2018 11:16 |
| Letzte Änderung: | 04 Feb 2022 12:40 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum