一种有效抵抗裁剪攻击的小波域盲水印算法  

A Blind Wavelet-Based Watermarking with Robust for Image Cropping

作　　者：王沛[1] 

机构地区：[1]上海师范大学数理信息学院,上海200234

出　　处：《电子与信息学报》2005年第7期1039-1042,共4页Journal of Electronics & Information Technology

基　　金：上海市教育委员会科学项目(04DC33)资助课题

摘　　要：该文提出了一种有效抵抗裁剪攻击的小波域盲水印算法,能从小的图像块上检测出水印。首先将图像进行小波变换,选择两个所需要的子带,利用相邻特征平均值和奇偶判决法在两个子带上各自重复内嵌一半水印,在水印检测过程中不需要原始图像。实验结果表明,该算法具有较好的透明性,对各种攻击有较强的鲁棒性,尤其是明显增强了小波域水印在面临裁剪攻击和联合攻击时的鲁棒性。A blind wavelet-based watermarking algorithm with robust for image cropping is proposed. The original image is transformed using wavelet transform and the watermarks are embedded in two selected subbands according to neighboring symbol's mean value and odd-even adjugement rule. This is a blind watermarking algorithm which can confirm the copyright without original image. Experimental results and attack analysis show that the watermark algorithm proposed in this paper is transparent and robust to various attacks. In particular, the robustness of wavelet domain watermarking to cropping attack and incorporating attacks is increased.

关 键 词：数字水印 小波变换 邻居特征平均值 奇偶判决法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]