基于图像纹理特征的变容量可逆水印算法  

Variable Capacity Reversible Watermarking Algorithm Based on Image Texture Feature

作　　者：李晓静[1] 郭飞燕[1] 马海英[2] Li Xiaojing;Guo Feiyan;Ma Haiying(Department of Art and Design,Jiyuan Vocational and Technical College,Henan 459000,China;College of Computer Science and Technology,Nantong University,Nantong 226019,China)

机构地区：[1]济源职业技术学院艺术设计系,河南济源459000 [2]南通大学计算机科学与技术学院,江苏南通226019

出　　处：《科技通报》2017年第10期98-103,124,共7页Bulletin of Science and Technology

基　　金：国家自然科学基金(61402244);2015年度河南省高等学校青年骨干教师资助计划(2015GGJS-282)

摘　　要：为了提高含水印图像的质量和篡改恢复质量,提出了一种变容量数字水印篡改恢复算法。该算法首先将图像分为2×2的图像块,根据图像的纹理特性生成不同长度的检测水印和附加水印,然后分别基于不同的密钥将其嵌入到图像块的不同位置;篡改检测时,采用分层篡改检测的方案定位被篡改图像块,并应用提取出的双重水印重构图像块结构和纹理特征,实现图像信息恢复。实验表明,该算法不但能提高含水印图像质量、篡改定位精度和恢复质量,而且能够有效抵抗均值攻击和拼贴攻击。To improve the quality of the watermark image and tampering content recovery,this paper proposed a variable-payload digital watermarking algorithm for tampering detection and contentrecovery.Firstly,the original image was divided into blocks with the size of.The detection watermark and additional watermark with different length were generated based on image texture feature.Then,they were embedded in different locations in the image block based on different keys.As the authentication,the tamper blocks were detected by hierarchical tampering detection.The Image information was recovered according to the image block structure and texture feature reconstructed.Experimental results show that the proposed scheme can not only improve the quality of watermark image,the positioning accuracy of tampering and the quality of recovery,but also resist attack such as the mean attack and the collage attack.

关 键 词：二维超混沌映射 数字水印 篡改检测 内容恢复 变容量 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]