基于二维离散小波变换的彩色图像水印技术研究

摘要

根据人眼的视觉系统特性，利用二维离散小波变换的多分辨率分析特性，提出一种自适应的水印嵌入算法。该水印算法能将一幅标识版权信息的水印图像（灰度图像）嵌入到一幅真彩色图像中。实验结果表明，该算法不但使水印具有不可见性，而且所嵌入的水印对空间几何失真和信号处理等具有较强的鲁棒性。%In view of the human visual system（HVS）, an adaptive watermark embedding algorithm is proposed employing the characteristics of multi-resolution analysis of the two-dimension discrete wavelet transform(DWT). This algorithm embeds a watermark image (grayscale image, which involves the copyright message) into a color image. The experimental results show that not only does this algorithm make the watermark invisible, but the imbeded watermark also has the strong robust upon the geometry distortion in the space and the signal processing etc.