基于混沌自适应滤波器的图像加密算法

Chaotic Adaptive Filter Based Color Image Encryption Algorithm

针对现有基于混沌系统的图像加密算法密钥敏感度性能较差的问题,提出一种基于混沌非线性自适应滤波器的彩色图像加密算法。首先,将明文图像分解为3个颜色通道,分别进行非线性滤波处理;然后,将明文像素分别进行置乱变换、线性与非线性变换三次变换,从而获得了较好的置乱效果与直方图均匀性。仿真对比实验结果表明,本方法具有强安全性,密钥敏感度远优于现有基于混沌系统的图像加密算法。

Aimed at the problem that the existing chaotic system based image encryption algorithm does not have good performance in key sensitivity, a chaotic non-linear adaptive filter based color image encryption algorithm is proposed. Firstly, the plaintext image is decomposed into three color channels, which are non-linear filtered separately; then, the plaintext pixels are processed by scrambling transformation, linear transformation and non-linear transformation, leading to a better scrambling effect and Histogram uniformity are realized. Simulation comparison experiment results show that, the proposal has hard security feature, the key sensitivity is better than the existing chaotic based image encryption algorithms.