BLOCK CONVERGENCE IN REPEATED TRANSFORM CODING: JPEG-100 FORENSICS, CARBON DATING, AND TAMPER DETECTION

被引：0

作者：

Lai, ShiYue ^{[1
]}

Boehme, Rainer ^{[1
]}

机构：

[1] Univ Munster, Dept Informat Syst, D-48149 Munster, Germany

来源：

2013 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP) | 2013年

关键词：

BLIND MEASUREMENT; COMPRESSION; ARTIFACTS;

D O I：

暂无

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Repeated rounding of sample blocks in alternating domains creates complex convergence paths. We study convergence and block stability for JPEG images compressed with quality factor 100 and derive methods to detect such compression in grayscale bitmap images, to estimate the number of recompressions, to identify the DCT implementation used for compression, and to uncover local tampering if image parts have been compressed with JPEG-100 at least once.

引用

页码：3028 / 3032

页数：5