基于DWT-SVD域的鲁棒数字图像水印算法

Robust Digital Image Watermarking Algorithm Based on DWT-SVD

提出了一种基于DWT-SVD域的鲁棒数字图像水印算法。该算法利用灰度图像作为水印,将其置乱加密后再进行SVD分解,然后将分解得到的奇异值嵌入到图像小波变换后的各频带的奇异值之中,水印嵌入强度随频带不同而不同。仿真实验结果表明,该算法对于常见的信号处理、JPEG压缩和几何失真具有较高的鲁棒性。

This paper introduces a robust digital image watermarking algorithm based on DWT - SVD. A gray image that has been dealt with by shuffle is made singular value decomposition firstly. After decomposing the cover image into four bands, the SVD is applied to each band, and embed the same watermark data by modifying the singular values. Simulation results show that high robustness can be obtained under the attack of normal signal processing, JPEG compression and geometric distortion.