| 利用DFT相位的矢量地理空间数据水印方法 |
| |
| 引用本文： | 王奇胜,朱长青,许德合.利用DFT相位的矢量地理空间数据水印方法[J].武汉大学学报(信息科学版),2011(5). |
| |
| 作者姓名： | 王奇胜 朱长青 许德合 |
| |
| 作者单位： | 信息工程大学测绘学院;南京师范大学虚拟地理环境教育部重点实验室;华北水利水电学院资源与环境学院; |
| |
| 基金项目： | 国家863计划资助项目(2006AA12Z223,2009AA12Z228) |
| |
| 摘 要： | 基于矢量地理空间数据自身的特点,运用离散傅立叶变换(DFT)技术研究了基于DFT相位的矢量地理空间数据数字水印算法。由于DFT相位的较小变化也会导致原始数据的较大改变,因此引入自相关检测来辅助判定数字水印的存在。实验表明,DFT相位水印算法在抗矢量地理空间数据处理中常见的删点、数据格式转换、平移、旋转等攻击方面具有较好的效果,并且针对浮点型数据的效果要明显优于整数型数据的结果。
|
| 关 键 词： | 矢量地理空间数据 版权保护 数字水印 离散傅立叶变换 稳健性 |
Watermarking Algorithm for Vector Geo-spatial Data Based on DFT Phase |
| |
| WANG Qisheng, ZHU Changqing XU Dehe.Watermarking Algorithm for Vector Geo-spatial Data Based on DFT Phase[J].Geomatics and Information Science of Wuhan University,2011(5). |
| |
| Authors: | WANG Qisheng ZHU Changqing XU Dehe |
| |
| Institution: | WANG Qisheng1,2 ZHU Changqing2 XU Dehe3(1 Institute of Surveying and Mapping,Information Engineering University,66 Middle Longhai Road,Zhengzhou 450052,China)(2 Key Laboratory of Virtual Geographic Environment,Nanjing Normal University,1 Wenyuan Road,Nanjing 210054,China)(3 Institute of Resources and Environment,North China University of Water Resources and Electric Power,36 Beihuan Road,Zhengzhou 450011,China) |
| |
| Abstract: | Based on the theory of discrete Fourier transform(DFT) and the characteristic of vector geo-spatial data for digital watermarking,a watermarking algorithm for vector geo-spatial data is studied by DFT phase.Because the little change of DFT phase can cause the big change of original data,the autocorrelation detection is used to assist for extracting digital watermarking.The experimental results show that the proposed algorithm is robust to the attack of vertex deletion,data format transformation,translation,... |
| |
| Keywords: | vector geo-spatial data copyright protection digital watermarking discrete Fourier transformation robustness |
| 本文献已被 CNKI 等数据库收录！ |
|
