一种基于ACF的抗几何失真水印算法  

An Watermarking Algorithm Resisting to Geometrical Distortion Based on ACF

作　　者：胡爱娜[1] 李陶深[1] 兰红星[2] 

机构地区：[1]广西大学计算机与电子信息学院 [2]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《微电子学与计算机》2007年第9期102-105,共4页Microelectronics & Computer

基　　金：广西留学回国人员科学基金(桂科回0342001)

摘　　要：提出一种改进的基于自参考概念和空间模板的自相关函数特性的数字水印算法。算法中的嵌入模板既可以标识变换的参数,也可以标识移动的坐标,以便于评估几何失真程度和提高水印恢复的效率。本算法在水印的鲁棒性和不可察觉性之间寻找一个平衡点,并在水印检测时实现盲检测。实验结果表明,该算法可以从全局和局部或非线性几何攻击中恢复失真,是实用和有效的。A new algorithm improving watermarking robustness based on a self-reference concept and exploits special autocorrelation features （ACF） of a spatial template is proposed in this paper. The embedding template in algorithm allows identifying both the transformation parameters and translation coordinates ,so that can estimate distortions and maximize watermark recovery effectiveness. The algorithm has found a good balance between the robustness and imperceptible of the algorithm, and realized the blind detection. Experiment results show that this algorithm can restore distortion caused by global and local or no-linear geometrical attack, and it is practical and effective.

关 键 词：数字水印 几何攻击 自相关函数 嵌入模板 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]