BIB-VERSION:: CS-TR-v2.0
ID:: ncstrl.dartmouthcs//TR2006-583
ENTRY:: September 05, 2006
ORGANIZATION:: Dartmouth College, Computer Science
TITLE:: Digital Image Ballistics from JPEG Quantization
TYPE:: Technical Report (paper)
REVISION:: 1
AUTHOR:: Farid, Hany
DATE:: September 2006
RETRIEVAL:: For a paper copy, email <reports@cs.dartmouth.edu>
RETRIEVAL:: For a paper copy, write to
       Technical Report Librarian
       Department of Computer Science
       Dartmouth College
       6211 Sudikoff Laboratory
       Hanover, NH 03755-3510
       USA
RETRIEVAL:: PDF at http://www.cs.dartmouth.edu/reports/TR2006-583.pdf
ABSTRACT:: 
Most digital cameras export images in the JPEG file format.  This
lossy compression scheme employs a quantization table that controls
the amount of compression achieved.  Different cameras typically
employ different tables.  A comparison of an image's quantization
scheme to a database of known cameras affords a simple technique for
confirming or denying an image's source.  Similarly, comparison to a
database of photo-editing software can be used in a forensic setting
to determine if an image was edited after its original recording.
END:: ncstrl.dartmouthcs//TR2006-583