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
Research article in proceedings (conference)
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