基于自适应图像块组合的无损图像认证算法  

Lossless image authentication algorithm based on adaptive combinations of image basic blocks

作　　者：罗剑高[1] 韩国强[2] 沃焱[2] 李向阳[1] 

机构地区：[1]广东农工商职业技术学院计算机系,广东广州510507 [2]华南理工大学计算机科学与工程学院,广东广州510006

出　　处：《通信学报》2012年第6期64-72,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(61070090;61003270);国家自然科学基金广东省联合基金资助项目(U1035004);中央高校基本科研业务费重点基金资助项目(2012ZZ0066);广东省重大科技专项基金资助项目(2010A080402005)~~

摘　　要：现有基于分块的无损图像认证算法在图像认证块划分方面存在不足。为此,提出一种基于自适应分块组合的无损图像认证算法。算法中的认证块由基本分块根据原图像特征和水印图像保真度要求自适应组合而成,认证信息用数字签名技术产生,以无损水印方式嵌入,同时以多次嵌入方式实现图像编号的顽健传送,利用图像编号和认证块编号防止矢量量化攻击。理论分析与实验结果表明该算法篡改定位能力强于现有无损图像认证算法,且适应性强,能抗矢量量化攻击。As the existing block-wise lossless image authentication algorithms were inadequate in the division of image authentication blocks,a novel lossless image authentication algorithm based on adaptive combinations of image basic blocks was proposed.The image authentication block was composed of some basic image blocks by the source image characteristics and requirements of watermarking image fidelity,and the authentication code was generated by a digital signature algorithm and embedded into the authentication block via a lossless watermarking algorithm.Moreover,the robust transmission of the image ID was achieved via multi-embedding,and using the ID and authentication block ID the image authentication algorithm could prevent vector quantizationattack.Theoretical analyses and experimental results demonstrate that the algorithm not only improves the existing tamper localization accuracy but also has strong adaptability and can resist vector quantization attack.

关 键 词：无损图像认证 可逆图像认证 无损图像水印 可逆图像水印 篡改定位 矢量量化攻击 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]