基于遗传算法的抗几何攻击图像水印方案  

Geometric invariant image watermark scheme using genetic algorithm

作　　者：张晓亮[1] 金聪[1] 

机构地区：[1]华中师范大学计算机科学系,武汉430079

出　　处：《电子测量技术》2009年第3期102-105,共4页Electronic Measurement Technology

摘　　要：现有的大部分鲁棒图像水印算法很难抵抗几何攻击,其原因是同步信息被破坏。因此只要在提取水印前使同步信息得到恢复,水印即可成功提取。本文采用仿射不变特征点匹配方法估计图像所经历的几何变换参数,其中特征点匹配通过遗传算法实现。水印嵌入过程是自适应的,且实现了盲提取。实验表明,本文提出的方法对多数攻击,尤其对几何攻击有很好的鲁棒性。Geometric attacks are very simple to defeat the most existing robust image watermark algorithms because synchronous information lost. So the watermark can be extracted successfully if the probe image recovered before extracting. In this paper, affine invariant points of original and probe image are computed to estimate the geometric parameters. The points matching are realized by genetic algorithm. It actualizes self-adaptive embedding and blind extraction. This method shows its robustness to various attacks by experiments, especially to geometric attacks.

关 键 词：几何攻击 仿射不变 特征点 遗传算法 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]