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Applied Optics 35 (26) (1996) 5267-5274
Implementation of arbitrary real-valued correlation filters for the shadow-casting incoherent correlator
Vincent Laude 1, Pierre Chavel 2, Philippe Réfrégier 1, 3
(1996)

We describe an incoherent correlator, based on the shadow-casting principle, that is able to implement any real-valued linear correlation filter. The correlation filter and the input image are displayed on commercial liquid-crystal television ~LCTV! panels. Although it cannot handle high-resolution images, the incoherent correlator is lensless, compact, low cost, and uses a white-light source. A bipolar technique is devised to represent any linear filter, computed from a single reference image or composite, in the correlator. We demonstrate experimentally the efficiency of the design in the case of optimal trade-off ~OT! filters and optimal trade-off synthetic discriminant function ~OT-SDF! filters
1 :  Thomson-CSF Laboratoire Central de Recherches
Thomson
2 :  Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO)
Institut d'Optique Graduate School (IOGS) – CNRS : UMR8501 – Université Paris XI - Paris Sud
3 :  Institut FRESNEL (IF)
CNRS : UMR6133 – Université de Provence - Aix-Marseille I – Université Paul Cézanne - Aix-Marseille III – Ecole Centrale de Marseille
lcf-scop
Informatique/Recherche d'information
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