摘要
为提高算法抵抗拼贴攻击的能力,本文结合块相关思想提出一种二值图像认证算法.该算法首先将每个图像块中的像素点分为"可翻转"和"不可翻转"两类,将"不可翻转"像素点Hash生成水印信息,用其替代相应映射块的"可翻转"像素点实现水印嵌入.通过比较图像块重构水印及提取水印的一致性判断该图像块的真实性,并结合各图像块邻域篡改特征进一步提高篡改检测性能.实验结果表明,该算法不仅提高了在替换、添加、删除攻击下的篡改检测性能,而且能够有效抵抗拼贴攻击.
To improve the ability against collage attack, a watermarking scheme for binary image authentication is proposed by introducing dependence of blocks in this paper. In the proposed algorithm, all pixels in each block are divided into the flipped pixels and the unflipped ones. The watermark information of each block is generated by hashing the unfiipped pixels of it, and embedded in the flipped pixels of the corresponding mapping block. The authenticity of each block is detected by comparing the consistency between the reconstructed watermark and the extracted one. The neighborhood tampering feature is used to improve the tamper detection performance. Experimental results show that the proposed algorithm can not only improve the performance of tamper detection in the general tampering such as replace, add, delete, etc., but also effectively resist collage attack.
出处
《自动化学报》
EI
CSCD
北大核心
2014年第6期1184-1190,共7页
Acta Automatica Sinica
基金
国家自然科学基金(61373180
60970122)
中央高校基本科研业务专项基金资助(SWJTU09CX039
SWJTU10CX09)
西藏自治区科技计划项目资助~~
关键词
二值图像
拼贴攻击
块相关
邻域篡改特征
Binary image, collage attack, block correlation, neighborhood tampering feature
