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Coupling theory is employed to analyze coupling gain and a new optical system is proposed for image edge enhancement, in which the ordinarily discarded background light is recycled as a pump source to amplify the signal light. We demonstrate the principle of optical correlation and compare the discrimination capability of two kinds of correlators by computer simulation. The results show that edge enhancement preprocessing can improve discrimination capability effectively. 相似文献
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边缘增强新方法及在联合变换相关器中的应用 总被引:3,自引:2,他引:1
基于耦合理论定义并推导出耦合增益系数g,分析耦合增益系数g随TL和r的变化.提出图像边缘增强的新光学系统,该系统利用背景信号增强边缘信号,具有高输出效率和高亮度的优点.设计并构建出该光学系统,并利用CCD获得手骨的边缘增强图像.论证了光相关原理,模拟边缘增强和非边缘增强字母E的三维相关分布,并比较了两种相关器的分辨率Iac和半高宽(FWHM).分析表明:边缘增强预处理能有效提高相关器的性能. 相似文献
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