【摘要】 利用人眼视觉特性，提出一种基于对比度灵敏矩阵的图像盲水印方案．该水印算法以随机产生的二值序列为水印，在ＤＣＴ域计算各个图像分块的视觉敏感性值，根据视觉敏感性值的大小自适应地调整水印嵌入强度．实验结果表明，水印算法对ＪＰＥＧ压缩、图像平滑、图像锐化、图像加噪等处理具有较好的抵御能力．更多还原

【Abstract】 A blind watermarking scheme for digital image based on Contrast Sensitivity Matrix (CSM) is proposed in this paper. Taking random generated bipolar series as a watermark, the scheme embeds it into DCT coefficients of each 8x8 pixels size block of an image adaptively according to the block’s visual sensitivity value. Experimental results show that the watermark can resist certain kinds of image processing like JPEG compression, Gaussian noise addition, sharping and smoothing etc.更多还原