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信用卡、证件以及商标等都需要安全稳定的防伪标志。目前社会上的很多防伪标志因为技术含量低而经常被伪造，给国家、企业或个人造成巨大损失。于是，一种为防伪光学图像保密和作安全检查的技术就成为这个领域里的热门。利用两个随机相位掩模将振幅识别的初始图像编码为复振幅稳定的白光噪音，从而使仅对光强敏感的探测器无法接收，以达到保密的目的。对保密的光学图像进行安全检验的方法则是利用光学４Ｆ系统或联合变换相关器对图像进行解码或识别。这种方法具有很强的抗盲卷积性质，是一种简便稳妥而实用的图像保密和安全检查方法，在广大的国家安全和商业保密领域里具有很大的发展潜力。
Credit cards, documents and trademarks all need security and stability of the security signs. At present, many anti-counterfeiting signs in the society are often forged because of their low technical content, causing huge losses to the country, enterprises or individuals. As a result, a security technology for security and security of optical image security has become a hot spot in this area. Two random phase masks are used to encode the initial image of amplitude recognition into white light noise with complex amplitudes, so that the detector sensitive to light intensity can not be received for security purposes. The security inspection of confidential optical images is based on the use of optical 4F systems or joint transform correlators to decode or recognize the images. This method has a strong anti-blind convolution property, is a simple and safe and practical method of image security and security checks in the vast field of national security and commercial secrets have great potential for development.