title: Homomorphic cameo filter for pattern recognition that is invariant with changes in illumination.
abstract: We introduce a new matched filter method that yields correlation peaks that are invariant with changes in the illumination of any targets. A scene containing objects at unknown locations is first subjected to a logarithmic transformation that changes the multiplicative constant to an additive background, which is then discriminated against by means of a composite filter containing a cameo of the true target and a term with which to discriminate against other false targets. Experimental results are shown.
authors: Centre d'Optique, Photonique et Laser, Départment de Physique, Université Laval, Quebec G1K 7P4, Canada.
authors: H H
authors: HH
authors: Arsenault
authors: D
authors: D
authors: Lefebvre