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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.
Bibliographic citation for this report: [plain text] [BIB] [BibTeX] [Refer]
Or copy and paste:
Hany Farid, "Digital Image Ballistics from JPEG Quantization: A Followup Study." Dartmouth Computer Science Technical Report TR2008-638, December 2008.
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