基于小波变换和Tucker分解的彩色图像数字水印

提出了一种通过小波变换和Tucker分解将水印信息同时嵌入彩色图像R、G、B通道的水印算法。首先对彩色图像R、G、B三通道进行小波变换，然后将获得的三个低频系数构成三阶张量，再经过Tucker分解后获得核心张量，通过在核心张量中嵌入水印信息使得水印信息扩散到原彩色图像的R、G、B三个分量中。通过实验表明，本算法对于压缩、噪声、滤波、缩放等攻击具有一定的鲁棒性，并与在同样嵌入规则下，直接将Tucker分解应用于彩色图像的算法比较，该算法具有更好的稳定性。

Color image watermark based on DWT and Tucker decomposition

This paper proposed a new color image watermarking algorithm based on DWT and Tucker decomposition. Applied DWT to R,G,B channel correspondingly, and used three low frequent coefficients to construct a 3-level tensor. Embedding the watermark into the core tensor, which got form Tucker decomposition, could diffuse the watermark into R,G,B. The experiment results indicate that this algorithm is robust to compress,noise,filter and geometric distortion. And the algorithm is better than the only Tucker based color image algorithm in a certain extent.