Passive detection of doctored JPEG image via block artifact grid extraction
Passive detection of doctored JPEG image via block artifact grid extraction
复制标题
DOI：
10.1016/j.sigpro.2009.03.025
复制
发表时间：
2009-09-01
影响因子：
4.4
通讯作者：
Yu, Nenghai
中科院分区：
文献类型：
--
作者：
Li, Weihai;Yuan, Yuan;Yu, Nenghai
已经注意到，在通过复制-粘贴操作对对象进行内插或隐藏时，由JPEG压缩过程中的分块处理引起的块伪影网格(BAG)通常是不匹配的。本文采用一种新的提取算法对袋子进行盲提取，然后通过标记过程检测出异常袋子。那么，网格不匹配或网格空白的现象就可以作为此类取证的痕迹。实验结果表明，该方法能够有效地对这些轨迹进行标注。(C)2009爱思唯尔B.V.保留所有权利。
It has been noticed that the block artifact grids (BAG), caused by the blocking processing during JPEG compression, are usually mismatched when interpolating or concealing objects by copy-paste operations. In this paper, the BAGs are extracted blindly with a new extraction algorithm, and then abnormal BAGs can be detected with a marking procedure. Then the phenomenon of grid mismatch or grid blank can be taken as a trail of such forensics. Experimental results show that our method can mark these trails efficiently. (C) 2009 Elsevier B.V. All rights reserved.