一种抗几何变换攻击的矢量数据盲水印算法  

A Blind Watermarking Algorithm for Vector Data Against Geometric Transformation Attack

作　　者：王云飞[1] 赵婧 王拓[1] 崔伟宏[1] 

机构地区：[1]中国科学院遥感应用研究所,北京100101 [2]北京四维图新科技股份有限公司,北京100028

出　　处：《计算机工程》2013年第1期136-139,共4页Computer Engineering

摘　　要：现有的矢量数据水印算法较难抵抗几何变换攻击。为此,提出一种针对线图层和面图层的矢量数据盲水印算法。利用Douglas-Peucker压缩算法提取矢量数据地物的特征点并计算地物特征点之间的距离比值,按阈值对比值序列进行划分,根据水印信息将特征点移动到相应的奇偶间隔之中,由此实现水印的嵌入。实验结果证明,该算法具有较好的不可感知性,对随机噪声、数据裁剪、数据压缩和几何变换等攻击具有较强的鲁棒性。Current watermarking algorithms for vector data are not resistant to geometric transformation attacks.This paper proposes a new blind watermarking algorithm.Douglas-Peucker compression is made to extract feature point.The ratio of the length between feature points is calculated and the ratio sequence is divided by the threshold.According to the watermark information,the feature point is moved to the odd or even interval.Experimental results show that the algorithm is fairly good in imperceptibility and robust to random noise,map cutting,data compression,geometric transformation attack and so on.

关 键 词：数字水印 几何变换攻击 几何不变域 特征点 Douglas-Peucker压缩算法 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]