A New Robust Watermarking Algorithm for Vector Data  

作　　者：ZHANG Lei YAN Dashun JIANG Shujuan SHI Tingting 

机构地区：[1]College of Computer Science and Engineering, Zhongkai University of Agriculture and Engineer, Guangzhou 510225, Guangdong, China [2]School of Computer Science and Technology, China University of Mining and Technology, Xuzhou 221008, Jiangsu, China

出　　处：《Wuhan University Journal of Natural Sciences》2010年第5期403-407,共5页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation of China (40401038)

摘　　要：Because the existing vector data watermarking algorithm is insufficiently robust for compression and cropping,and has no sufficient control on map deformation,a new watermarking algorithm was proposed in this paper.Its main features are：① it selected feature points and non-feature points from the sequence of Douglas,and then embedded watermarking points by wavelet transform,which is based on layer segmentation;② it enhanced the map deformation control design.Furthermore,it increased the map graphic deformation control design.The algorithm was applied to experimental data,and the test results showed that the algorithm had good robustness on graphics geometric transformation,the addition,deletion and cropping of points in graph layers.Also,the graph distortion had been well controlled.Because the existing vector data watermarking algorithm is insufficiently robust for compression and cropping,and has no sufficient control on map deformation,a new watermarking algorithm was proposed in this paper.Its main features are：① it selected feature points and non-feature points from the sequence of Douglas,and then embedded watermarking points by wavelet transform,which is based on layer segmentation;② it enhanced the map deformation control design.Furthermore,it increased the map graphic deformation control design.The algorithm was applied to experimental data,and the test results showed that the algorithm had good robustness on graphics geometric transformation,the addition,deletion and cropping of points in graph layers.Also,the graph distortion had been well controlled.

关 键 词：vector graphics Douglas Puck transform wavelet transform blind watermarking ROBUST 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]