一种抗几何失真的水印校正方法研究  

ON ANTI-GEOMETRICAL DISTORTIONS METHOD OF WATERMARKING CORRECTION

作　　者：张晓黎[1] 

机构地区：[1]上海对外贸易学院,上海201600

出　　处：《计算机应用与软件》2009年第7期14-16,共3页Computer Applications and Software

基　　金：国家自然科学基金项目(40372027)

摘　　要：几何攻击会使大多数水印算法监测器失效,从而制约了水印技术的实用性。提出一种基于特征点集和Hausdorff距离的抗旋转和缩放攻击的数字水印检测校正方法。算法利用水印图像受攻击前后的小波域特征点集和点集之间的Hausdorff距离来估计图像所经历的几何失真。实验证明,算法性能稳定、精度高、可校正较大强度的联合几何失真。Geometric attacks are to fail most of the monitors of watermarking algorithm and which restrains the practicality of watermarking technique. The paper presents a novel detecting and correcting method for digital watermarking, it is based on feature point sets and Hansdofff distance and is of against rotation and scaling attacks. The method estimates the geometrical distortions the image experienced by using the Hausdoff distance between feature points＇ geometry sets before and after the watermarking image being attacked in wavelet domains. The experiments prove that the algorithm has stable and precise performance, and can correct highly intense geometric distortions.

关 键 词：特征点集 HAUSDORFF距离 几何失真 数字水印 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术] TP391.41[自动化与计算机技术—计算机科学与技术]