联合变换实现子波变换的理论分析

Theory Analysis of Optical Wavelet Transform Using Joint Transform Correlator

首次提出用联合变换相关的概念，把Ｈａａｒ子波和ＲＯｂｅｒｔｓ滤波器分别与目标图像一起作为联合图像，实现对目标图像的子被交换，提取出目标的角、边及边沿增强等特征．并设计了一套由计算机控制的光学联合子波变换系统，可实现对目标“真实”的光学子波变换．还给出了数值模拟结果．

Optical wavelet transform (WT) with joint transform correlator (JTC) was described in this Paper. Haar wavelets and Roberts filters, respectively, were put together with an object image as a joint image. At the output plane of the JTC, the WT of the object was obtained, the features, such as corners, edges, sharpening images, of the object were extracted. These features will be useful in post- pattern recognition. A programmable optiCal joint wavelet transform system was proposed in this paper, which can be used to realize 'true' WT of an object image. Digital simulation results are provided.