中文摘要：

提出一种基于双相位编码的单通道彩色图像加密方法.在该方法中,将彩色图像转换到HSI空间,I分量即可作为相位编码的原始待加密图像;而采用双随机相位加密技术对S分量加密后得到的相息图,与H分量一起构成了对I分量加密的双相位.由于双随机相位加密技术有很高的安全性,在不知密钥的情况下解出S分量几乎是不可能的,由此保证了彩色图像加密的安全性.模拟实验结果证明了该方法的有效性.

英文摘要：

In this paper,a new method of encrypting a color image in one channel based on double-phase encoding is presented. In this method,the colors of a color image are converted from RGB to HSI,so the I component can be used as the original image which could be encoded with double-phase. The kinoform of S is obtained by using double-random phase encryption and the H component can be used as the two phases. It is difficult to recover the S component if the phase keys are not available,because double-random phase encoding is robust to blind retrieval trials,so the security of the method proposed is guaranteed. Computer simulations are presented to illustrate the efficiency of this method.