摘要
提出一种基于像素置乱技术的多重双随机相位加密法,对该加密法中像素置乱操作的原理进行了阐述,并且提出在光学上实现像素置乱操作和解置乱操作的途径.在计算机上模拟实现了该加密法,并且得到很好的加密解密结果.仿真结果证实仅用部分加密图像来解密也能够得到原图像,并且得到随着待解密的加密图像像素的增加,解密图像的信号能量、噪声以及信噪比的变化曲线.最后分析比较了该加密法与双随机相位加密法,得到该加密法与双随机相位加密法相比具有更高的保密性,而且解密图像的信噪比也不会因为引入像素置乱操作而降低.
A novel encryption based on iterative double random phase encoding and pixel scrambling technology is proposed. The principle of pixel scrambling method is described, and good results are given by numerical simulation used the proposed method. It is shown from numerical simulation that the original image can been reconstructed only when part of the encrypted image is used by this method. The relationship curves of the energy, noise and SNR of the decoded image via the pixels number of the decrypting image is given. By comparing the proposed method with the double random phase encryption, it comes to the conclusions that this method has better performance than the double random phase encryption, and the SNR of the decoded image will not decrease due to pixel scrambling. Finally an optical approach to realize the pixel scrambling is also proposed.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第7期1069-1073,共5页
Acta Photonica Sinica
基金
西北工业大学研究生创业种子基金资助(z20040064)
关键词
图像加密
像素置乱
双随机相位加密
密钥
Image encryption
Pixel scrambling
Double random phase encryption
Secret key
