基于多小波变换和分块SVD的彩色图像水印算法

提出了一种基于多小波变换和分块SVD的非盲水印算法。选择彩色图像的饱和度分量作为水印的嵌入域，水印为有意义的灰度图像，水印经Arnold置乱后被嵌入到饱和度分量多小波变换的不同中频区域中。实验证明，该算法不仅对噪声、JPEG压缩、剪切及Photoshop处理具有很好的鲁棒性，而且能抵抗旋转、放缩和平移等几何攻击。

A Color Image Watermarking Algorithm Based onMulti-Wavelet Transform and Block-SVD

A non-blind watermarking algorithm is proposed based on multi-wavelet transform and block singular value decomposition. Choosing the saturation component of a color image as the watermark embedding domain, the watermark is a meaningful grayscale image. After Arnold scrambling, watermark is embedded into the different mid-frequency regions of the saturation component which through multi-wavelet transform. The examples demonstrate that the algorithm not only has good robustness to the noise, JPEG compression, shear and Photoshop processing , but also can resist to some geometric attacks such as rotation, scale and translation.