一种DCT域的鲁棒性水印算法  

A Robust Watermarking Algorithm Base on DCT Domain

作　　者：王标[1] 刁振琦[1] 韩忠美[1] 张晓利[1] 唐伟跃[1] 

机构地区：[1]郑州大学物理工程学院,河南郑州450001

出　　处：《河南机电高等专科学校学报》2011年第2期17-19,共3页Journal of Henan Mechanical and Electrical Engineering College

摘　　要：鲁棒性、嵌入容量和掩蔽性是衡量数字水印算法性能的重要指标,一个可行的水印算法要在满足具体要求的情况下协调三者的关系使其达到相对平衡的状态。文中介绍了一种通过修改8点DCT变换后高频系数来调制嵌入水印的算法,给出了相应的误差控制方案。仿真实验表明,该算法嵌入容量较大并具有很好的掩蔽性,对噪声、滤波、剪切、量化等攻击具有较强的鲁棒性。Robustness, embedding capacity and masking property are the important indexes for measuring a dig- ital watermarking algorithm, a feasible watermarking algorithm should coordinate the relationship between them when meeting a specific requirement. The paper presents a watermarking algorithm of image based on DCT domain. The algorithm does eight block integer DCT transform to the original image and embeds hiding information through modif ying the transformed highest frequency coefficient, and the corresponding error control scheme is given. Experimental results show that this algorithm has large capacity and better invisible quality ,it has and strong robustness to noise, wave filtering, crop, quantification .

关 键 词：鲁棒性水印 一维DCT 高相关性 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]