Optical wavelet feature extraction using a multiple-input phase-only encoded joint-transform correlator

摘要

We describe an optical joint-transform correlator (JTC) that uses phase-only encoded inputs, for multi-scale wavelet feature extraction. The analysis of the JTC is extended to multiple phase-only encoded inputs which allowed combinations of cmss-correlations between input images to produce a multi-scale wavelet transform under certain conditions. In addition, we compare the results of phase-encoding to that of amplitude-encoding. Using multiple-input phase encoding allows' feature extraction to be performed with wavelets described in the spatial domain.