用计算全息制作改进的Mexican-hat子波匹配滤波器实现二维光学子波变换

Realization of 2 D Optical Wavelet Transform Using a Mexican hat Wavelet Matched Filter Modified by Computer generated Holography

提出了应用计算全息制作改进的Ｍｅｘｉｃａｎ－ｈａｔ子波匹配滤波器，在一个光学４ｆ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，实验结果与计算机模拟完全一致。

This paper describes a improved Mexican hat wavelet transform with an optical 4f correlator. An optically modified Mexican hat wavelet matched filter is created by the use of computer generated holography (CGH). Experimental results for 1 D and 2 D wavelet transform are obtained. The experimental results accord with the numerical results of ref. very well. The main advantage of the proposed method lies in that any types of wavelet matched filters can be fabricated and their 2 D wavelet transform can be realized.