Authors
T.N.C. Doan, Florent Retraint, T.H. Thai, Cathel Zitzmann,
Title
Quality factor estimation of JPEG compressed images
In
2016 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2016 - Proceedings
Pages
104–108
Publisher
Institute of Electrical and Electronics Engineers Inc.
Year
2017
Publisher's URL
http://dx.doi.org/10.1109/GlobalSIP.2016.7905812
Indexed by
Abstract
The goal of the paper is to present a new approach to estimate the quality factor value for a JPEG image. This approach is based on the statistical model of variance of blocks 8 × 8 for JPEG images. The variance model follows Gamma distribution, characterized by two parameters which are used to calculate a distance between the first and the second compressions. The distance in case of compressing images twice with the same value of quality factor is exploited as characterized fingerprint for quality factor identification of a JPEG image. Experiments with simulated and real images highlight the relevance of the proposed approach. © 2016 IEEE.
Affiliations
Offprint