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

Authors:
R. García;C. Ureña;M. Sbert
Affiliations:
Universitat de Girona, Spain {rgarcia@ima.udg.edu, mateu@ima.udg.edu};Universidad de Granada, Spain curena@ugr.es;Universitat de Girona, Spain {rgarcia@ima.udg.edu, mateu@ima.udg.edu}
Venue:
Computer Graphics Forum
Year:
2012

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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. © 2012 Wiley Periodicals, Inc.