基于Arnold置乱和离散傅立叶变换的图像加密算法

Image Encryption Algorithm Based on Arnold Image-Scrambling and Discrete Fourier Transform

提出了一种新的基于Arnold图像置乱和离散傅立叶变换相结合的数字水印算法。首先将原始图像划分子块,对每一图像块进行DFT变换,将二值水印图像用Arnold变换置乱,然后按一定规则把水印信息分散嵌入到数字产品中。本算法复杂度较低,实用性较强。仿真结果证明其具有较好的鲁棒性和透明性以及抗JPEG压缩、旋转和噪声干扰能力。

A new digital watermark algofithrn based on Arnold image scrambling and discrete Fourier transform was represented. The watermark information is scrambled firstly and then embedded into the digital images with a certain method. Various attack tests were carried out, and the results show that this algorithm was of efficiency, good transparency and robustness.