基于约化上 Hessenberg 矩阵的图像数字水印算法

摘要

针对图像数字水印算法计算量和稳健性二者之间的矛盾提出了一种水印算法。将图像作为矩阵约化为上 H矩阵，利用 H 矩阵的一些系数是图像信息的内在表示且计算中得到的矩阵 Uk具有对称性和正交性，然后给出水印嵌入算法。仿真实验表明论文算法在计算量和稳健性方面优于传统的 DCT 水印算法。%In order to solve the contradiction between the computational cost and robustness of the image digital water‐marking algorithm ,an image digital watermarking algorithm was proposed .The image as matrix was reduced to upper H matrix ,Using the coefficient of H matrix was the internal representation of image information and with symmetry and or‐thogonal of the matrix Uk was obtained in the process of calculation .Then the watermark embedding algorithm was presen‐ted .Compared with the traditional DCT algorithm ,simulation experiments showed the computational cost and robustness of the algorithm was better than that of the original algorithm .