基于不同DCT对齐的双JPEG压缩检测技术  

Double JPEG Compression Detection Based on Different DCT Alignment

作　　者：侯贵松 HOU Guisong(Institute of Quantitative&Technological Economics(IQTE),Chinese Academy of Social Sciences,CASS,Beijing 100732,China)

机构地区：[1]中国社会科学院数量经济与技术经济研究所,北京100732

出　　处：《自动化与仪器仪表》2022年第9期50-53,共4页Automation & Instrumentation

基　　金：河北重点研发计划项目:基于大数据综合分析应用的大气环境监控预警及溯源评估系统开发与应用示范(20313701D)。

摘　　要：JPEG图像在各个领域应用广泛,因此,JPEG图像的篡改检测在取证中起着重要作用。在创建数字伪造时,一个图像通常与几个部分组合,合成部分可能会留下原始图像的痕迹。目前已经提出了一些成功的方法来检测具有相同DCT变换块的双JPEG压缩,但如果是移位的,对应的检测就会变得困难。为此,提出了一种检测不同DCT变换块下双JPEG压缩的方法。该算法基于JPEG压缩引起的DCT系数特征,提出了循环移位版本的思想。经过实验取得了不错的检测效果。JPEG image is widely used in various fields, so JPEG image tampering detection plays an important role in forensics. When creating digital forgery, an image is usually combined with several parts, and the composite part may leave traces of the original image. Some successful methods have been proposed to detect dual JPEG compression with the same DCT transform block, but the corresponding detection will become difficult if it is shifted. Therefore, we propose a new method to detect the double JPEG compression under different DCT transform blocks. Based on DCT coefficients caused by JPEG compression, the idea of cyclic shift version is proposed. After the experiment has achieved good detection results.

关 键 词：数字取证 双重JPEG压缩 DCT对齐 循环移位 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]