基于二维Arnold变换的图像双置乱算法

IMAGE TWICE-SCRAMBLING ALGORITHM BASED ON TWO-DIMENSIONAL ARNOLD TRANSFORMS

Arnold变换在图像置乱中具有较为广泛的应用。对Arnold变换矩阵在图像置乱中的应用进行了分析,并在此基础上提出了基于二维Arnold变换的双置乱算法,其中将二维Arnold变换同时用于位置置乱和灰度置乱,既改变了图像的纹理信息又改变了图像的统计信息。实验结果表明,该算法简单、安全,在少量的置乱迭代次数下即可达到较好的置乱效果。

Arnold transform has wide applications in image scrambling.The application of Arnold transformation matrix in image scrambling is analysed in this paper,a twice-scrambling algorithm based on two-dimensional Arnold transforms is proposed.In the algorithm,two-dimensional Arnold transformation is applied in location scrambling and gray-scale scrambling simultaneously,this changes the texture information and the statistical information of the image both.Experimental results show that the algorithm is simple and secure,and can achieve preferable good scrambling effect in smaller number of scrambling iterations.