双随机相位加密中相息图的优化设计

Optimization of kinoform in double-random-phase encryption

采用基于记忆的模拟退火法对双随机相位加密中的相息图进行优化设计 ,并用该法分别对一个二元图像和一个灰度图像进行了模拟实验 .实验结果表明 ,在不增大设计冗余度的情况下 ,运用该方法可降低相息图和密钥的相位量化带来的误差 ,得到与原加密图像质量几乎相同的解密图像 .

In this paper, the design of kinoforms in double-random-phase encryption method is optimized by the memory-based simulated annealing technique, which is applied to the simulation experiment of a binary image and an image with gray levels. The results of the experiments show that, without increasing the abundance of design, the errors caused by the quantization of phases of kinoform and key is decreased, and almost the same image quality as the original one is obtained as a decoded image by the proposed method.