中国激光, 1996, 23 (8): 741, 网络出版: 2006-12-04
利用光折变全息术实现的光学子波变换
Optical Wavelet Transform with Photorefractive Holographic Matched Filtering
光学子波变换 Haar模板 光折变匹配滤波 optical wavelet transform Haar mask photorefractive holographic matched filter
摘要
提出了用镀膜方法制备Haar模板,用光折变晶体记录子波函数的全息匹配滤波器,在一个无焦成像系统中实现了二维子波变换。给出了简要的理论分析和实验结果。
Abstract
An optical implementation of Haar wavelet transform is presented. In this method, Haar wavelet mask is prepared by thin film coating, holographic matched filters of wavelet functions are recorded in a piece of photorefractive crystal, and confocal optical systems are used as a correlator with zoom lens. A brief theoretical analysis and experimental results are given. This optical wavelet transform possesses some evident advantages, such as, simple and real- time operation, high resolution and high light efficiency, and large dada capacity.
康辉, 许剑, 战元龄, 张铁群. 利用光折变全息术实现的光学子波变换[J]. 中国激光, 1996, 23(8): 741. 康辉, 许剑, 战元龄, 张铁群. Optical Wavelet Transform with Photorefractive Holographic Matched Filtering[J]. Chinese Journal of Lasers, 1996, 23(8): 741.
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