随机相位加密中相息图的优化

Optimization of Kinoform in Random Phase Encryption

采用有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,并应用本方法对指纹像进行了模拟实验。实验结果表明,运用该方法,在不增大设计冗余度的情况下,可进一步降低相息图的量化带来的误差,使解密图像的质量得到进一步提高。

The design of kinoforms in double-random phase encryption method was optimized by the memory-based simulated annealing technique, which was applied to the simulation experiment of a fingerprint image. The results of the experiments show that, without increasing of abundance of design, the errors caused by the quantization of kinoform is decreased with the proposed method and the quality of the decrypted images can be improved.