利用HVS特性的DCT数字水印算法

DCT Digital Watermark Algorithm By Using HVS

利用人眼视觉系统HVS(Human Visual System)的特性,提出了一种基于DCT变换域的数字水印方案。在保证图像视觉质量的前提下,合理分配嵌入的水印能量,尽可能提高嵌入水印在任一局部的分量强度。本算法将这几种敏感度特征结合起来,使其自适应地调节嵌入的强度,在保证了图像视觉质量的同时,也使嵌入的水印达到了最佳的鲁棒性。

Using the characteristic of human eye vision system HVS （Human Visual System）, this article proposed one kind of digital watermark plan based on DCT transformation territory. Under guaranteeing image vision quality,it inserts watermark energy with rational distribution,and enhances the inserting watermark as far as possible in any partial component intensity. Therefore this article unifies these kinds of sensitivity characteristic, adjusts its auto-adapted intensity of inserting.as guaranteeing image vision quality, it also enabled the inserting watermark to achieve the best robustness.