一种基于压缩图像的反取证方法  

Anti-forensic method based on image compression

作　　者：程格平[1] 王毅[1] 

机构地区：[1]湖北文理学院数学与计算机科学学院,湖北襄阳441053

出　　处：《计算机时代》2015年第9期12-13,16,共3页Computer Era

基　　金：湖北省教育厅青年教师深入企业项目(XD2014244);湖北省自然科学基金项目(2014CFB634);襄阳市研究与开发计划项目

摘　　要：图像处理软件的广泛使用使数字图像的篡改和伪造变得更加容易,这给图像数据的安全性带来严重影响。数字图像取证是解决这个问题的关键技术,逐渐成为研究热点。反取证技术能够有效降低或消除取证技术的检测效果,尚没有得到应有的重视。提出一种针对JEPG压缩的反取证技术,通过在压缩图像的DCT系数中添加适当的噪声移除量化块效应,从而去除图像取证的检测证据。实验结果表明,所提出的方法能够明显降低JEPG图像取证方法的检测性能。The widespread use of image processing software makes it easy to tamper and counterfeit a digital image, which will lead to serious influence to the security of image data. The digital image forensics is the key technology to solve the problem and is gradually becoming the research focus. Anti-forensics technology can effectively reduce or eliminate the detection effect of the forensics, but it has not been paid due attention. In this paper, an anti-forensics technology is proposed for JEPG compression,which removes the quantization blocking artifacts by adding appropriate noise to the DCT coefficients in a compressed image, so as to eliminate forensic detection evidence of the image. The experimental results show that the proposed method can significantly reduce the detection performance of the JEPG image forensics.

关 键 词：压缩图像 图像取证 反取证技术 量化效应 检测性能 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]