MULTIPLE-INPUT JOINT TRANSFORM CORRELATOR FOR WAVELET FEATURE-EXTRACTION

We describe a joint transform correlator (JTC) that uses multiple inpu t images encoded in the spatial domain for multiwavelet feature extrac tion. We extend the theory of a JTC to multiple inputs, which enables various combinations of cross-correlations between input images to be performed. Furthermore, we provide experimental results for four input s with an optically addressed spatial light modulator in the Fourier p lane. In addition, it is possible that the space-bandwidth product for multiwavelet feature extraction can be made the same as for a two-inp ut JTC. (C) 1998 Society of Photo-Optical instrumentation Engineers.