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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 to verify it

This work has been supported by the research projects coded TIN2007-68066-C04-01 and TIN2010-21089-C03-01 (Spanish Commission for Science and Technology), by grants VALTEC09-2-0118 and 2009SGR643 (Catalan Government) and by FEDER funding from the European Union

© Computer Graphics Forum, 2012, vol. 31, núm., p. 33-41

Wiley

Author: García Hernandez, Rubén Jesús
Ureña, Carlos
Sbert, Mateu
Date: 2012
Abstract: 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
This work has been supported by the research projects coded TIN2007-68066-C04-01 and TIN2010-21089-C03-01 (Spanish Commission for Science and Technology), by grants VALTEC09-2-0118 and 2009SGR643 (Catalan Government) and by FEDER funding from the European Union
Format: application/pdf
ISSN: 0167-7055 (versió paper)
1467-8659 (versió electrònica)
Document access: http://hdl.handle.net/10256/11675
Language: eng
Publisher: Wiley
Collection: MICINN/PN 2011-2013/TIN2010-21089-C03-01
MEC/PN 2007-2010/TIN2007-68066-C04-01
AGAUR/2009-2014/2009 SGR-643
CIDEM/2009-2012/VALTEC09-2-0118
Reproducció digital del document publicat a: http://dx.doi.org/10.1111/j.1467-8659.2011.02081.x
Articles publicats (D-IMA)
Is part of: © Computer Graphics Forum, 2012, vol. 31, núm., p. 33-41
Rights: Tots els drets reservats
Subject: Kernel, Funcions de
Kernel functions
Infografia
Computer graphics
Funcional de densitat, Teoria del
Density functionals
Title: Description and solution of an unreported intrinsic bias in photon mapping density estimation with constant kernel
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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