一种图像内容可恢复的脆弱水印算法  

Fragile watermarking algorithm with capability of restoring image contents

作　　者：潘蓉[1] 田玉敏[1] 董萱[1] 

机构地区：[1]西安电子科技大学计算机学院,陕西西安710071

出　　处：《华中科技大学学报（自然科学版）》2012年第7期67-70,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61070045);国家部委预研基金资助项目;中央高校基本科研业务费专项资金资助项目;陕西省自然科学基础计划资助项目(2010JM8011)

摘　　要：提出一种图像内容可恢复的脆弱水印算法,采用数字签名的MD5算法提取分块图像的特征值生成水印.在恢复系统中,恢复比特来源于原图压缩后的数据并将此数据嵌入到图像的最低有效位以实现自恢复.实验结果表明:该算法简单,安全性高,不但具有检测篡改的能力,而且能够对被篡改区域进行修复;对局部发生的篡改可以有效地检测和精确定位,能够有效地抵抗拼贴攻击.A fragile watermarking algorithm used to restore the image content was proposed,which could not only detect tampering,but also restore the tampered area.The generation of the watermark was based on the eigenvalues of the blocks of an image using MD5algorithm of digital signature.In the recovery mechanism,the recovery bits generated from the compressed original image were embedded into the least significant bits（LSB）of the image.Experimental results demonstrate that this algorithm is simple and secure which can effectively detect and precisely locate the tampering in the local area,and also detect collage-attack effectively.

关 键 词：图像认证 水印算法 脆弱性水印 自嵌入水印 水印信息 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]