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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Veröffentlicht in:Computer graphics forum Jg. 31; H. 1; S. 33 - 41
Hauptverfasser: García, R., Ureña, C., Sbert, M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Oxford, UK Blackwell Publishing Ltd 01.02.2012
Schlagworte:
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
Online-Zugang:Volltext
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Beschreibung
Zusammenfassung: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.
Bibliographie: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
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2011.02081.x