JPEG文件隐形信息检测算法  

A JPEG steganalysis algorithm

作　　者：潘晓声[1] 黄继风[1] 

机构地区：[1]上海师范大学数理信息学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2005年第3期26-32,共7页Journal of Shanghai Normal University(Natural Sciences)

摘　　要：隐秘信息分析的目的是正确分辨出文件中是否带有隐藏的信息.自然图像和含密图像的DCT系数经过差分之后,它们的直方图会呈现不同的规律,作者以此为特征向量,来检测JPEG图像是否带有隐藏信息.通过对原特征向量进行分析,提取了二次特征,用来估算在JPEC文件中大致所埋的信息量.实验结果表明,这一算法有效.The purpose of image steganalysis is to find out whether the hidden messages exist in images. After differencing DCT coefficients of natural - images and stego - images, their histograms present different laws. This paper regards this as the feature vector to determine whether a hiding message is in the image. Though the analysis of former feature vector, the author extracts a new feature to estimate the amount of hidden information in JPEG. The results of the experiments show our approach is extremely effective.

关 键 词：数字信息隐写术 隐秘分析术 自然图像 含密图像 支持向量机 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]