一种基于混沌置乱和SVD的小波域盲水印算法

提出了一种基于混沌和奇异值分解相结合的数字水印算法.该算法对原始图像做离散小波变换后得到4个子带,并将低频子带(LL1)分成互不重叠的8×8分块,然后对每一块做奇异值分解,将混沌置乱后的水印信息嵌入每块中最大的奇异值中.实验结果表明,该算法具有较好的不可见性、鲁棒性和安全性.

A watermark algorithm based on chaos permutation and SVD

This paper proposes a digital watermarking algorithm based on chaos permutation and singular value decomposition. By using of discrete wavelet transform, the algorithem divides the original image into four bands, and decomposes the low sub-band into uncovered 8×8 blocks, then decomposes every block with SVD and inserts the watermarking information scrambled by chaos into the largest singular value of each block. Experimental results indicate that the performance of the proposed watermarking algorithm is invisible, robust and secure.