提出了一种基于对角占优阵的频域水印算法,实现数字产品版权认证。在宿主图像DCT域构造严格对角占优阵并进行LU分解,之后在U阵中进行二值图像水印嵌入。嵌入过程中利用Logistic混沌序列对水印置乱加密,检测过程为盲检测。实验分析表明,该算法具有良好的不可见性、鲁棒性和安全性。
A digital watermarking algorithm is proposed based on diagonally dominant matrixes in the frequency domain to complete digital products' copyright certification. Binary image watermarks that are scrambled by Logistic chaotic encryption are embedded into the U matrix by LU decomposition in DCT domain. It is a blind detection algorithm. Simulation experiments show the new algorithm with good invisibility, robustness and security.