一种利用相角对加性隐写模型进行分析的方法

Steganalysis of additive modelable information hiding using phase angles

基于图像在加性隐写模型下隐写前后差分直方图离散傅里叶变换与隐写信息离散傅里叶变换间的对应关系,从隐写前后差分直方图离散傅里叶变换相角的变化入手,提取特征,在理论上加以论证并从实验上得到验证。对UCID V2标准图库进行实验,结果表明,本方法对加性隐写模型具有很好的检测效果。

Based on the relationship between the DFT of probability mass function （PMF） of stegonoise and the DFT of diffe-rence histogram of cover image and stegoimage, this paper began with the difference of phase angles which were computed from the DFT of cover imag and stegoimage, then extracted the feature, finally it proved and verified our theory with the experiments. The results of the experiment using the image library of UCID V2 shows that this methord has a good ability to detect the original images from stegoimages which are embeded with additive model.