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Proceedings Paper

Binary phase-only 1/f joint transform correlator
Author(s): Tim D. Wilkinson; William A. Crossland
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Paper 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).

Paper Details

Date Published: 23 March 1998
PDF: 5 pages
Proc. SPIE 3386, Optical Pattern Recognition IX, (23 March 1998); doi: 10.1117/12.304791
Show Author Affiliations
Tim D. Wilkinson, Cambridge Univ. (United Kingdom)
William A. Crossland, Cambridge Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 3386:
Optical Pattern Recognition IX
David P. Casasent; Tien-Hsin Chao, Editor(s)

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