基于系数关系的小波域彩色图像水印方法

提出了一种小波域图像水印方法,该方法首先对YUV彩色空间中图像的亮度分量Y进行降采样,划分为四个子图像。利用四个子图像的对应低频系数大小关系实现水印的嵌入。而水印的提取是通过判别四个子图像的对应低频系数大小关系来完成的。实验结果表明该方法对抗诸如JPEG压缩、旋转、缩放、锐化等攻击具有较好的鲁棒性。

Color Image Watermarking Scheme in Wavelet Domain Based on Support Vector Machines

A wavelet domain image watermarking method is presented in this paper.The luminance component Y of color image in YUV color space is subsampled and divided into four sub-image.Then,the watermark embedding is realized by applying the greater and lesser correlation of corresponding low-frequency coefficient between four sub-images.On the other hand,the watermark extraction is achieved through judging the correlation between corresponding low-frequency coefficient of four sub-images.Experimental results show that the proposed method has good performance and the robustness to resist common attacks such as JPEG,rotation,scaling,sharping and so on.