Description and Solution of an Unreported Intrinsic Bias in Photon Mapping Density Estimation with Constant Kernel

This paper presents an analysis of the irradiance estimator often used in photon mapping algorithms and concludes that the classical approach with a constant kernel overestimates the correct value. We propose a new estimator that solves this problem and provide both theoretical and empirical studies...

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Vydané v:	Computer graphics forum Ročník 31; číslo 1; s. 33 - 41
Hlavní autori:	García, R., Ureña, C., Sbert, M.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Oxford, UK Blackwell Publishing Ltd 01.02.2012
Predmet:	Algorithms Analysis Computer graphics Density Empirical analysis Estimators F.2.2 [Analysis of Algorithms and Problem Complexity]: Non-numerical Algorithms and Problems G.3 [Probability and Statistics] I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism Image processing systems Kernels Mapping Mathematical models Photons Studies
ISSN:	0167-7055, 1467-8659
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Popis
Shrnutí:	This paper presents an analysis of the irradiance estimator often used in photon mapping algorithms and concludes that the classical approach with a constant kernel overestimates the correct value. We propose a new estimator that solves this problem and provide both theoretical and empirical studies to verify it.
Bibliografia:	ArticleID:CGF2081 istex:060A693554540703E3384BEE563323EE4AB8093B ark:/67375/WNG-M353470G-Q ObjectType-Article-1 SourceType-Scholarly Journals-1 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	0167-7055 1467-8659
DOI:	10.1111/j.1467-8659.2011.02081.x