基于Arnold变换和Lorenz混沌系统的彩色水印图像加密算法

摘要

This algorithm uses the Arnold transformation and the color image scrambling definition, to solve the Lorenz chaos system's dynamic equation, to obtain three chaos sequences. Then it carries on scrambling processing after Arnold scrambling's each color component. The simulation experiment result indicated that this algorithm has overcome the Arnold transformation and the Lorenz chaos system's shortcoming, can resist many kinds of attacks, enables the high security of the colored watermark image.%该算法利用Arnold变换以及彩色图像的置乱度定义,求解Lorenz混沌系统的动力学方程,得到三个混沌序列:然后对Arnold置乱后的每个颜色分量进行置乱处理,仿真实验结果表明,该算法克服了Arnold变换和Lorenz混沌系统的缺点,能够抵抗多种攻击,使彩色水印图像具有较高的安全性.