We present a single-channel system for color image recognition that is based on a joint-transform correlator setup. The color images are encoded as phase and amplitude functions, inspired from the Munsell color representation. A real-time implementation of the new codification method can be achieved by the use of a spatial light modulator operating in phase-only modulation mode. We determine the optimal codification for a linear color-phase code. Its performance is compared with a conventional multichannel correlator by means of computer simulations. Experimental results are also presented.
© 1996 Optical Society of America
David Mendlovic, Meir Deutsch, Carlos Ferreira, and Javier García, "Single-channel polychromatic pattern recognition by the use of a joint-transform correlator," Appl. Opt. 35, 6382-6389 (1996)