Optimization of a binary filter by direct binary search algorithm for rotation-invariant JTC

J. A. Butt; T. D. Wilkinson; W. A. Crossland

doi:10.1117/12.504504

23 October 2003 Optimization of a binary filter by direct binary search algorithm for rotation-invariant JTC

J. A. Butt, T. D. Wilkinson, W. A. Crossland

Proceedings Volume 5202, Optical Information Systems; (2003) https://doi.org/10.1117/12.504504
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

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.

Citation Download Citation

J. A. Butt, T. D. Wilkinson, and W. A. Crossland "Optimization of a binary filter by direct binary search algorithm for rotation-invariant JTC", Proc. SPIE 5202, Optical Information Systems, (23 October 2003); https://doi.org/10.1117/12.504504

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