Block convergence in repeated transform coding: JPEG-100 forensics, carbon dating, and tamper detection.
Lai ShiYue, Böhme Rainer
Zusammenfassung
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.
Publikationstyp
Forschungsartikel in Sammelband (Konferenz)
Begutachtet
Ja
Publikationsstatus
Veröffentlicht
Jahr
2013
Konferenz
IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2013
Konferenzort
Vancouver, BC, Canada
Erste Seite
3028
Letzte Seite
3032
Verlag
IEEE
Sprache
Englisch
ISSN
1520-6149
DOI