Abstract

A polychromatic pattern recognition using a color LCTV based joint-transform correlator (JTC) is presented. This technique uses a color liquid crystal panel with a polychromatic coherent source, by which a set of color joint-transform spectra can be captured by a polychromatic CCD camera. By simply duplicating the set of color joint-transform spectra patterns on the color liquid crystal panel, a set of color correlation peaks can be attained by polychromatic illumination. One of the major features of the polychromatic detection is the exploration of the spectra content. Since a programmable color LCTV is used in the proposed system, it is easy to make the system adaptive. Moreover, the proposed polychromatic JTC offers the advantage of simplicity of operation, in which the strengthen alignment problems can be avoided. Experimental demonstrations of the proposed adaptive polychromatic JTC are provided. We have shown that the spatial content of target can indeed be detected.

© 1992 Optical Society of America