JPEG compression metric as a quality-aware image transcoding
USITS'99 Proceedings of the 2nd conference on USENIX Symposium on Internet Technologies and Systems - Volume 2
The JPEG still picture compression standard
IEEE Transactions on Consumer Electronics
Identification of bitmap compression history: JPEG detection and quantizer estimation
IEEE Transactions on Image Processing
JPEG compression history estimation for color images
IEEE Transactions on Image Processing
Detecting and extracting the photo composites using planar homography and graph cut
IEEE Transactions on Information Forensics and Security
Software framework for testing JPEG quantization tables for iris recognition
AMERICAN-MATH'12/CEA'12 Proceedings of the 6th WSEAS international conference on Computer Engineering and Applications, and Proceedings of the 2012 American conference on Applied Mathematics
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The quantization tables used for JPEG compression can also be used to help separate images that have been processed by software from those that have not. This loose classification is sufficient to greatly reduce the number of images an examiner must consider during an investigation. As illicit imagery prosecutions depend on the authenticity of the images involved, this capability is an advantage for forensic examiners. This paper explains how quantization tables work, how they can be used for image source identification, and the implications for computer forensics.