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DC poleHodnotaJazyk
dc.contributor.authorSzirmay-Kalos, László
dc.contributor.authorGyörgy, Antal
dc.contributor.authorSbert, Mateu
dc.contributor.editorSkala, Václav
dc.date.accessioned2013-03-07T07:02:23Z
dc.date.available2013-03-07T07:02:23Z
dc.date.issued2005
dc.identifier.citationJournal of WSCG. 2005, vol. 13, no. 2, p. 49-56.en
dc.identifier.issn1213–6964 (online)
dc.identifier.issn1213–6980 (CD-ROM)
dc.identifier.issn1213–6972 (hardcover)
dc.identifier.urihttp://wscg.zcu.cz/WSCG2005/Papers_2005/Journal/!WSCG2005_Journal_Final.pdf
dc.identifier.urihttp://hdl.handle.net/11025/1454
dc.description.abstractThis paper proposes a new random walk strategy that minimizes the variance of the estimate using statistical estimations of local and global features of the scene. Based on the local and global properties, the algorithm decides at each point whether a Russian-roulette like random termination is worth performing, or on the contrary, we should split the path into several child paths. In this sense the algorithm is similar to the go-with-the-winners strategy invented in general Monte Carlo context. However, instead of establishing thresholds to make decisions, we compute the number of child paths on a continuous level and show that Russian roulette can be interpreted as a kind of splitting using fractional number of children. The new method is built into a path tracing algorithm, and a minimum cost heuristic is proposed for choosing the number of rejected rays. Comparing it with the classical path tracing approach we concluded that the new method reduced the variance significantly.en
dc.format8 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherVáclav Skala - UNION Agencycs
dc.relation.ispartofseriesJournal of WSCGen
dc.rights© Václav Skala - UNION Agencycs
dc.subjectglobální osvětlenícs
dc.subjectnáhodná procházkacs
dc.subjectMonte Carlocs
dc.titleGo with the winners strategy in path tracingen
dc.typečlánekcs
dc.typearticleen
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.subject.translatedglobal illuminationen
dc.subject.translatedrandom walken
dc.subject.translatedMonte Carloen
dc.type.statusPeer-revieweden
Vyskytuje se v kolekcích:Volume 13, Number 1-3 (2005)

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