VQ域信息隐藏检测算法

Detection of VQ Based Information Hiding

随着信息隐藏技术的发展，基于矢量量化（VQ）的信息隐藏的方法逐渐增多．本文提出了一种VQ域隐藏信息检测方法，首先通过全局搜索在已经解码的无压缩图像中恢复量化码书，然后应用聚类分析的思想将矢量空间中相近的码字归类以判断是否存在隐藏信息，最后根据各个码字的出现概率估计嵌入信息的长度．实验表明，本文提出的算法对隐藏信息的存在性有很高的识别率，对信息量的估计也比较准确．

With the development of information hiding technique, some algorithms based on vector quantization have been proposed. In this paper,we present a detection method for the VQ based information hiding algorithm. This method uses the exhaustive search to retrieve the codebook, and then use clustering of codewords to decide if the image contains stegano information and estimate the length of it. The experiment proves the validity of the method.