Optical wavelet transform by the phase-only joint-transform correlator

被引：17
|
作者：
Erbach, PS [1 ]
Gregory, DA [1 ]
Yang, XY [1 ]
机构：
[1] UNIV NEW ORLEANS, DEPT ELECT ENGN, NEW ORLEANS, LA 70148 USA
来源：
APPLIED OPTICS | 1996年 / 35卷 / 17期
关键词：
optical correlator; wavelet transform; liquid-crystal televisions; phase-only spatial light modulators;
D O I：
10.1364/AO.35.003117
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A method is presented that performs the optical wavelet transform with liquid-crystal televisions as spatial light modulators operating only on the phase of the incident coherent light. The architecture is the joint-transform correlator, and the wavelets and the image to be transformed are encoded in the input plane of the system. The mathematical formalism describing the adaptation of the joint-transform correlator to the wavelet transform is given and extended to the operation of the phase-only joint-transform correlator. A new wavelet is described for two-dimensional image processing, and experimental results are presented for optical wavelet transforms done in real time by use of this wavelet in the phase-only joint-transform-correlator architecture. The analysis is extended to multiwavelet (multispectral) analysis by the joint-transform correlator, and simulation results are given. Finally, experimental results with the phase-only joint-transform correlator applied to multiwavelet analysis are presented. (C) 1996 Optical Society of America
引用
收藏
页码：3117 / 3126
页数：10
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