基于Arnold变换和双混沌序列的二值图像置乱算法

Binary Image Scrambling Scheme Based on Arnold Transformation and Two Chaotic Sequences

提出一种基于Arnold变换和双混沌序列的二值图像置乱算法。首先使用Arnold变换扰乱像素间的逻辑联系,并使用中间截取法取得Logistic和Hybrid两个离散化的混沌序列中间序列部分,再用两个取得的序列与图像作"异或"处理来修改图像的像素值。仿真实验结果证明,该算法可有效地实现二值图像的加密,密钥空间大;加密后的图像,像素分布均匀,安全性好。

A binary image scrambling scheme based on Arnold transformation and two chaotic sequences is proposed. First Arnold transformation is used to disrupt the logical links between pixels, and the intercepting method is used to get two intermediate sequences from Logistic and Hybrid chaotic sequences discretized, then the two sequences and the image are processed by XOR operation for the purpose of changing pixel value. The simulation results show that the algorithm can effectively achieve binary image encryption and it has more key space. The encrypted image has uniform distribution of pixets and good security.