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Reduction of the correlation sensitivity to the changes of the input illumination by a post processing based on the
Christophe Minetti1, Frank Dubois, Jean-Claude Legros
1Université Libre de Bruxelles, Service de Chimie-Physique EP CP 165/62, Brussels, Belgium. cminetti@ulb.ac.be
Applied Optics
|June 21, 2002
Abstract:
Linear-correlation amplitude changes when the intensity level of the input image is modified. As recognition is often based on the correlation-peak level, a change of the input illumination may result in a false recognition. We propose an illumination-change compensation by a post processing of the correlation distribution that is based on statistical measures of the correlation histograms. The theoretical background and simulation results are provided in the frame of an actual application in biology.