基于分形理论的小波域水印模型  

Watermarking model in wavelet domain based on fractal theory

作　　者：孙建国[1] 张国印[1] 门朝光[1] 姚爱红 曹刘娟 

机构地区：[1]哈尔滨工程大学计算机科学与技术学院,哈尔滨150001

出　　处：《吉林大学学报（工学版）》2011年第1期203-208,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：中国高校基础研究基金项目(HEucF061006)

摘　　要：提出一种基于小波变换与分形编码技术相结合的矢量地图零水印模型。通过小波变换获得地图的低频系数块,利用分形相似计算获得与该低频系数块匹配的图像子块,将图像子块通过拼贴生成零水印并提交第三方版权认证机构备案。实验表明:该水印模型受几何攻击后的平均误码率为文中同类算法的0.6,且能够抵制IBM攻击。A zero-watermarking model of vector map based on the Discrete Wavelet Transform （DWT） and fractal coding technology was proposed. By wavelet transformation, the map blocks with low- frequency coefficient can be captured. Then the matched domain blocks can be obtained through fractal similarity computation. The zero-watermark, consisted of the domain blocks and range blocks, was submitted to the third-party authentication agency as a back-up. Experiment results show that under the geometric transformation attacks, the average error coding rate of the proposed watermarking model is 0.6, lower than other mentioned models, and the model is capable of resisting the IBM attacks.

关 键 词：计算机应用 矢量地图 零水印 小波 分形 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]