一个多分辨率的图像水印方案

图像经小波多级分解后，各子图包含了原图像的不同信息，通过用伪随机实数修改中高频细节子图中较大的小波系数值，本文提出了一个基于小波变换的多分辨率静态灰度图像水印嵌入和检测方案。对水印图像进行退化处理模拟实验表明，嵌入的水印具有很好的鲁棒性。同时，水印的检测仅需涉及到相关的几个细节子图，减少了计算量，加快了检测速度。

A SCHEME FOR MULTIRESOLUTION IMAGE WATERMARKING

Sub-images contain different information when the original image decomposed with wavelet. By modifying the larger wavelet coefficients of middle-high frequency range detail sub-images with pseudo-random sequence of real numbers, the paper proposes a scheme for static gray image watermarking embedding and detection based on wavelet multiresolution transform. The experimental results show that the embedding watermarking is robust enough and the watermarking detection is only relevant to some detail sub-images, it simplifies and accelerates the algorithm.