Combined Correlated and Importance Sampling in Direct Light Source Computation and Environment Mapping
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Date
2004
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association and Blackwell Publishing, Inc
Abstract
This paper presents a general variance reduction method that is a quasi-optimal combination of correlated and importance sampling. The weights of the combination are selected automatically in order to keep the merits of both importance and correlated sampling. The proposed sampling method is used for efficient direct light source computation of large area sources and for the calculation of the reflected illumination of environment maps. Importance sampling would be good in these cases if the sources are hidden, while correlated sampling is efficient if the sources are fully visible. The proposed method automatically detects the particular case and provides results that inherit the advantages of both techniques.
Description
@article{10.1111:j.1467-8659.2004.00790.x,
journal = {Computer Graphics Forum},
title = {{Combined Correlated and Importance Sampling in Direct Light Source Computation and Environment Mapping}},
author = {Szecsi, Laszlo and Sbert, Mateu and Szirmay-Kalos, Laszlo},
year = {2004},
publisher = {The Eurographics Association and Blackwell Publishing, Inc},
ISSN = {1467-8659},
DOI = {10.1111/j.1467-8659.2004.00790.x}
}