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Neural Computation

June 1, 2002, Vol. 14, No. 6, Pages 1371-1392
(doi: 10.1162/089976602753712981)
© 2002 Massachusetts Institute of Technology
A Bayesian Approach to the Stereo Correspondence Problem
Article PDF (1.29 MB)

I present a probabilistic approach to the stereo correspondence problem. Rather than trying to find a single solution in which each point in the left retina is assigned a partner in the right retina, all possible matches are considered simultaneously and assigned a probability of being correct. This approach is particularly suitable for stimuli where it is inappropriate to seek a unique partner for each retinal position—for instance, where objects occlude each other, as in Panum's limiting case. The probability assigned to each match is based on a Bayesian analysis previously developed to explain psychophysical data (Read, 2002). This provides a convenient way to incorporate constraints that enable the ill-posed correspondence problem to be solved. The resulting model behaves plausibly for a variety of different stimuli.