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Optimal Absorption Probabilities for Random Walk Radiosity

✍ Scribed by Mateu Sbert

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 108 KB
Volume: 62
Category: Article
ISSN: 1524-0703
DOI: 10.1006/gmod.1999.0513

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✦ Synopsis

In this paper we study random walk estimators for radiosity with generalized absorption probabilities. That is, a path will either die or survive on a patch according to an arbitrary probability. The estimators studied so far, the infinite path length estimator and the finite path length one, can be considered as particular cases. Practical applications of the random walks with generalized probabilities are given. A necessary and sufficient condition for the existence of the variance is given, together with a heuristic to be used in practical cases. The optimal probabilities are also found for the case when we are interested in the whole scene and are equal to the reflectivities.

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