基于证据理论数据融合的双效水印  

DOUBLE EFFECT WATERMARKING ALGORITHM BASED ON DATA FUSION OF EVIDENCE THEORY

作　　者：陈丽萍[1] 姚志强[2] 孔祥增[1] 

机构地区：[1]福建师范大学数学与计算机科学学院,福建福州350007 [2]福建师范大学软件学院,福建福州350007

出　　处：《计算机应用与软件》2011年第8期50-53,161,共5页Computer Applications and Software

基　　金：国家自然科学基金项目(60673014);福建省教育厅B类项目(JB08048)

摘　　要：提出一种新的基于证据理论的数据融合的双效水印算法。首先应用水印公式构造特殊的水印嵌入后条件,根据嵌入系数之间的定性分析提取鲁棒水印;利用嵌入系数之间的定量分析能提取脆弱水印,并能准确定位篡改的区域。其次在嵌入过程中还使用纠错码对水印信息进行调和,把水印重复嵌入到图像信息的不同位置,以便利用纠错码的辅助信息来估计出提取的水印的失真程度,然后结合证据理论对其数据进行融合获得鲁棒水印。实验结果表明其可以抵抗模糊、滤波、锐化、压缩、噪声和剪切等单重以及多重攻击,同时还可准确地定位篡改发生的位置。A novel blind double effect watermarking algorithm of data fusion technology is proposed based on evidence theory.Firstly the watermarking formula is applied to constructing such a special condition after embedding,the robust watermark is extracted by the qualitative analysis among embedding coefficients and the fragile watermark is extracted by quantitative analysis among embedding coefficients,the tempered area is able to be located precisely.Secondly the error correction code is contributed to the reconciliation of the watermark in embedding process,the watermark is repeatedly embedded into different places of image information thus the assistant information of error correction code can be used to estimate the distortion level of the extracted watermarks.After that the evidence theory is then combined to fuse their data to acquire robust watermarks.Experiment results have proved that the algorithm can resist multiple attacks of blurring,filtering,sharpening,compressing,noises and cutting;it can also locate the position where the tamper occurs.

关 键 词：水印 证据理论 数据融合 双效 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]