摘要
以多级小波变换,奇异值分解为基础,一种新的可以同时抵抗几何变换及噪声攻击的图像数字水印算法被提出。首先对水印图像先做加密处理,将原始图像进行多级小波分解,然后对其低频部分进行奇异值分解,并把已加密的水印信息嵌入其中。实验结论和攻击测试表明:该算法不仅具有较好的不可感性,而且与相近算法相比,该方法可以同时抗击几何变换,如旋转、剪切、镜像,及叠加噪声如椒盐、高斯噪声等外界攻击,并具有很好的鲁棒性。
A new digital image watermarking algorithm based on Disperse Wavelet Transform and Singular Value Decomposition is proposed. The first step is to encrypt the watermarking image. Then, using Disperse Wavelet Transform to analyze the original image. At the end, based on block Singular Value Decomposition, a new algorithm for embedding the watermarking into the low frequency part is proposed. Compared with other similar watermarking algorithms reported in the literatures, the experiment based on this algorithm demonstrates that the watermark is robust to the geometry transform （rotate, crop）and the common signal processing techniques including salt and pepper noise.
出处
《计算机仿真》
CSCD
2008年第4期87-90,共4页
Computer Simulation
