基于zernike矩图像区域复制篡改认证

分析了区域复制篡改图像的特征，提出了运用zernike 矩的不变性对自然图像区域复制篡改进行认证.对于尺寸较大的篡改图像运用小波变换得到低频子图像，把低频子图像分割为一系列图像子块，对子块序列图像分别进行zernike矩分析并判断图像区域是否复制篡改.将各个相邻复制篡改的子块进行区域合并.实验结果表明，本文的篡改认证方法既克服了噪声对认证的影响又解决了几何变换对认证的影响.

Tamper authentication by region duplication based on zernike moments

This paper analyzes region duplication to tamper with characteristics of picture and proposes tamper authentication by region duplication based on invariability of zernike moments. It is proposed that using wavelet transform to obtain low frequency sub-image for bigger tampered picture that is divided into a series of sub-block, judging regions whether they are tampered with duplication, and merging neighboring tampered sub-block lastly. The experimentations indicate that the method can not only overcome the influence of noise,but also solve the influence of geometry transform to authentication.