Photorefractive correlators for optical pattern recognition and object motion measurement: Some improved techniques

被引：0

作者：

Tripathi, R ^{[1
]}

Singh, K ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Photon Grp, New Delhi 110016, India

来源：

SELECTED PAPERS FROM PHOTONICS INDIA '98 | 1999年 / 3666卷

关键词：

joint-transform correlator; photorefractive crystal; wavelet transform; speckle metrology;

D O I：

10.1117/12.347983

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper reports the outcome of research studies carried out by us in the area of Optical Pattern Recognition. We describe experimental realization of two kinds of all-optical nonlinear photorefractive (PR) joint transform correlators. One method uses a controllable beam-fanning nonlinearity and the other uses an incoherent erasure beam in PR wave-mixing. An experimental technique has been demonstrated to achieve high pattern discrimination using a bank of wavelet filters. Correlation technique has further been extended to real-time object motion measurement.

引用

页码：598 / 605

页数：8

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