旋转、平移及尺度不变性小波域第二代水印技术  

Rotation,scale and translation invariant second generation image watermarking in DWT domain

作　　者：张力[1] 肖薇薇[1] 张基宏[1] 

机构地区：[1]深圳大学信息工程学院,深圳518060

出　　处：《深圳大学学报（理工版）》2005年第1期17-21,共5页Journal of Shenzhen University(Science and Engineering)

基　　金：深圳市科技计划资助项目(200336)

摘　　要：提出一种小波域中具有旋转、平移和尺度不变性的第二代图像水印技术.水印信号由原始图像产生,在水印检测前,利用原始图像的矩信息估计水印图像所经过的旋转、平移和尺度变换参数,根据估计参数对水印图像进行相应恢复及水印提取,检测过程不需要原始图像;给出利用原始图像的几何矩和Tchebichef矩进行估计参数的方法.实验表明,该方法精度高,对水印测试软件Stirmark具有很好的鲁棒性.A new scheme of rotation, translation and scaling invariant second generation image watermarking was proposed in this paper. Before dectecting watermark, the parameters of geometric distortions, such as rotation, translation and scaling, were estimated by using the moments of original image, i.e. geometric moments and Tchebichef moments. The watermark was generated from the original image, which was not required during the detection process. Various simulation results have shown that the proposed method is robust against the popular watermark benchmark-Stirmark.

关 键 词：旋转 平移 尺度变换 图像矩 小波域第二代水印技术 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]