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Proceedings Paper

Efficient joint transform processor
Author(s): Mohammad S. Alam
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Paper Abstract

An efficient joint transform processor, called the phase- encoded fringe-adjusted joint transfer correlator (PFJTC) is proposed which employs phase encoding and nonlinear Fourier plane apodization for optimizing the correlation performance. For input scenes involving multiple identical targets, existing JTCs require multi-step on-line processing to eliminate the false alarms and other artifacts. The proposed PFJTC eliminates the possibility of false target detection by eradicating the false correlation peaks, and alleviates the effects of noise and other artifacts, in just one step thus ensuring higher processing speed. The phase encoding operation and the Fourier plane apodization does not have any detrimental effect on the processing speed. This technique ensures better utilization of space- bandwidth-product by using separate input and reference planes and by yielding only one peak per target instead of a pair of peaks produced by alternate JTCs. An all-optical implementation for the PFJTC technique is proposed and computer simulation results are presented.

Paper Details

Date Published: 31 March 2000
PDF: 12 pages
Proc. SPIE 4043, Optical Pattern Recognition XI, (31 March 2000); doi: 10.1117/12.381584
Show Author Affiliations
Mohammad S. Alam, Univ of Alabama/Tuscaloosa (United States)


Published in SPIE Proceedings Vol. 4043:
Optical Pattern Recognition XI
David P. Casasent; Tien-Hsin Chao, Editor(s)

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