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Proceedings Paper

Photorefractive-material-based pattern recognition using fringe-adjusted correlation
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Paper Abstract

The application of photorefractive materials has shown remarkable promise over the last two decades for various computation-intensive information processing applications such as pattern recognition. In this paper, we explore various two-beam coupling and four-wave mixing architectures and algorithms for all-optical implementation of real time pattern recognition techniques suing photorefractive materials. The application of novel concepts such as the incoherent-erasure fringe-adjusted joint transform correlation, obscured target detection, heterogeneous correlation and nonlinear compansive noise reduction for enhancing the correlation performance are discussed in detail. The trade-offs between various performance criteria such as correlation peak intensity, efficiency and noise performance has been investigated.

Paper Details

Date Published: 19 October 2000
PDF: 12 pages
Proc. SPIE 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI, (19 October 2000); doi: 10.1117/12.404784
Show Author Affiliations
Mohammad S. Alam, Univ. of Alabama (United States)
Jehad Khoury, Lartec, Inc. (United States)


Published in SPIE Proceedings Vol. 4110:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI
Shizhuo Yin; Francis T. S. Yu, Editor(s)

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