Block convergence in repeated transform coding: JPEG-100 forensics, carbon dating, and tamper detection.

Lai ShiYue, Böhme Rainer


Abstract
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.



Publication type
Conference Paper

Peer reviewed
Yes

Publication status
Published

Year
2013

Conference
IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2013

Venue
Vancouver, BC, Canada

Start page
3028

End page
3032

Publisher
IEEE

Language
English

ISSN
1520-6149

DOI