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Proceedings Paper

Optimization of a binary filter by direct binary search algorithm for rotation-invariant JTC
Author(s): J. A. Butt; T. D. Wilkinson; W. A. Crossland
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Paper Abstract

An optimum training process using a direct binary search algorithm for synthesising a spatial domain binary filter to implement in the joint transform correlator (JTC) architecture is presented. The major advantage of the proposed filter are rotation invariance, higher discriminability for similar targets, and convenience for optical implementation in the JTC using a Ferroelectric over silicon SLM as a binary phase modulator. Results of the invariant filter are presented for classical JTC, DC free JTC using phase shifting technique, and for the binarised JTC by applying edge-enhancement and mean thresholding at the JPS. Testing so far, shows that binary filter is able to distinguish between target and anti-target images for all these cases.

Paper Details

Date Published: 23 October 2003
PDF: 10 pages
Proc. SPIE 5202, Optical Information Systems, (23 October 2003); doi: 10.1117/12.504504
Show Author Affiliations
J. A. Butt, Cambridge Univ. (United Kingdom)
T. D. Wilkinson, Cambridge Univ. (United Kingdom)
W. A. Crossland, Cambridge Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 5202:
Optical Information Systems
Bahram Javidi; Demetri Psaltis, Editor(s)

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