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

Mohammad S. Alam; Jehad Khoury

doi:10.1117/12.404784

19 October 2000 Photorefractive-material-based pattern recognition using fringe-adjusted correlation

Mohammad S. Alam, Jehad Khoury

Proceedings Volume 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI; (2000) https://doi.org/10.1117/12.404784
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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.

Citation Download Citation

Mohammad S. Alam and Jehad Khoury "Photorefractive-material-based pattern recognition using fringe-adjusted correlation", Proc. SPIE 4110, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VI, (19 October 2000); https://doi.org/10.1117/12.404784

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