基于颜色梯度特性的彩色图像隐写分析  

Reliable steganalysis of color images based on color gradient sequence

作　　者：綦科[1,2] 张大方[1] 谢冬青[2] 

机构地区：[1]湖南大学计算机通信学院,湖南长沙410082 [2]广州大学计算机科学与教育软件学院,广东广州510006

出　　处：《通信学报》2011年第1期27-36,共10页Journal on Communications

基　　金：国家高技术研究发展计划("863"计划)基金资助项目(2009AA012420);国家自然科学基金资助项目(60673156);广东省自然科学基金资助项目(9151009001000059)~~

摘　　要：基于彩色图像任意2个颜色通道间梯度方向随机序列及颜色梯度和随机序列的振荡特性在隐写前后均有明显变化的特征,提出了一种基于颜色梯度特性的彩色图像盲隐写分析算法。算法应用HHT(Hilbert-Huang transform)提取4个序列在隐写前后的内在振荡特征差异,构建基于Hilbert谱的特征向量,采用SVM分类器进行分类判别。实验表明,该算法误检率低,检测性能优于现有彩色图像隐写分析算法,可以实现彩色图像隐写的可靠检测。Based on the difference between the vibrations of color gradient orientation sequences and color gradient sum sequences of stego images and those of images without hiding message,a novel reliable steganalysis of color images was presented which major in the analysis of these two categories of color gradient sequences,which could distill the differ-ences of the vibrations of them.The Hilbert-Huang transform based characteristic vectors were constructed and the SVM classifier was used to classification.The experimental results have shown that the proposed method realizes the reliable steganalysis of color images with higher correct rate,shorter vectors and lower false positive rate comparing with tradi-tional color image steganalysis algorithms.

关 键 词：彩色图像隐写分析 MUMFORD-SHAH模型 颜色梯度和序列 颜色梯度方向序列 HHT 

分 类 号：TP911.73[自动化与计算机技术]