Binary phase-only 1/f joint transform correlator

Tim D. Wilkinson; William A. Crossland

doi:10.1117/12.304791

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23 March 1998 Binary phase-only 1/f joint transform correlator

Tim D. Wilkinson, William A. Crossland

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Proceedings Volume 3386, Optical Pattern Recognition IX; (1998) https://doi.org/10.1117/12.304791
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

We present a new means of creating a binary phase only 1/f joint transform correlator using a ferroelectric liquid crystal spatial light modulator. By using the two-pass technique of the 1/f JTC in combination with a binary phase FLM SLM it is possible to build a mechanically robust correlator with a correlation rate in excess of 2 kHz. By using a checkerboard phase encoded input, it is possible to use the FLC SLM as a binary phase modulator while also avoiding the problem of CCD camera saturation due to zero order. An edge enhancement algorithm is then used on the captured image to produce a suitable image for the second pass through the correlator. The algorithm has been chosen to produce a near perfect binary phase image which results in a correlation plane with greatly suppressed zero order (or dc terms).

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Tim D. Wilkinson and William A. Crossland "Binary phase-only 1/f joint transform correlator", Proc. SPIE 3386, Optical Pattern Recognition IX, (23 March 1998); https://doi.org/10.1117/12.304791

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