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Optics Letters

Optics Letters


  • Vol. 25, Iss. 21 — Nov. 1, 2000
  • pp: 1567–1569

Homomorphic cameo filter for pattern recognition that is invariant with changes in illumination

Henri H. Arsenault and Daniel Lefebvre  »View Author Affiliations

Optics Letters, Vol. 25, Issue 21, pp. 1567-1569 (2000)

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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.

© 2000 Optical Society of America

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(110.2970) Imaging systems : Image detection systems
(150.2950) Machine vision : Illumination
(200.4740) Optics in computing : Optical processing

Henri H. Arsenault and Daniel Lefebvre, "Homomorphic cameo filter for pattern recognition that is invariant with changes in illumination," Opt. Lett. 25, 1567-1569 (2000)

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