Technical Report Number
The lossy JPEG compression scheme employs a quantization table that controls the amount of compression achieved. Because 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. This report describes the analysis of quantization tables extracted from 1,000,000 images downloaded from Flickr.com.
Dartmouth Digital Commons Citation
Farid, Hany, "Digital Image Ballistics from JPEG Quantization: A Followup Study" (2008). Computer Science Technical Report TR2008-638. https://digitalcommons.dartmouth.edu/cs_tr/320