彩色图像盲数字水印新算法的研究

提出了一种基于彩色图像亮度分量的DCT域下的数亨水印算法．该算法利用丁密钥和水印之问的对应关系，将二值图像作为水印嵌入到彩色图像亮度分量的DCT域系数中，提取过程无需使用原始图像，实现了隐藏信息的肓检测．实验结果表明：该算法不仅具有较好的透明性，而且对于如JPEG压缩、几何剪切、高通滤波等攻击均具有较好的鲁棒性．

A new algorithm for blind color image watermarking

In this paper a new digital watermark algorithm based on DCT region luminance component of color image is proposed. The algorithm adopts the relation between a secret key and watermark to embed the binary image into DCT coefficients of color image luminance components as watermark. The watermark can be extracted without the original image and implements blind extraction of the hidden information. Experimental results show that the proposed watermarking scheme is good in transparency and robustness against various attacks such as JPEG compression, geometrie clipping,and high pass filtering etc.