一种半易损图像水印认证技术  

Semi-Fragile Watermarking Scheme for Image Authentication

作　　者：卢正鼎[1] 杨双远[1] 

机构地区：[1]华中科技大学计算机科学与技术学院,湖北武汉430074

出　　处：《小型微型计算机系统》2005年第9期1640-1642,共3页Journal of Chinese Computer Systems

基　　金：信息产业部电子信息产业发展基金资助;科技部科技型中小企业创新基金(04C26214201284)资助.

摘　　要：提出了一种用于图像完整性认证的半易损数字水印算法,利用原始图像的HVS特性,将二值图像生成的水印信号嵌入到变换后的DCT系数中.检测器能够从接收到的水印图像中提取出水印图像,并且定位受到攻击的图像位置.实验结果表明,该算法具有较好抗JPEG压缩鲁棒性和识别被篡改的区域能力.A semi-fragile watermarking scheme for image authentication is proposed in this paper. Taking a binary pattern image as the watermark, The scheme embeds the watermark into DCT coefficients of each 8 ＊ 8 pixels size block of the host image by using the technique of the HVS. The extractor can not only extract the watermark signal but also locate the possible region which is balefully modified for the watermarked image. The experimental results demonstrate our algorithm is robust against JPEG compression and excellent for detecting the modified region.

关 键 词：数字水印 HVS 半易损 图像认证 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]