In-Depth DCT Coefficient Distribution Analysis for First Quantization Estimation

• URL: http://arxiv.org/abs/2008.03206v1
• Date: Fri, 7 Aug 2020 14:46:10 GMT
• Title: In-Depth DCT Coefficient Distribution Analysis for First Quantization Estimation
• Authors: Sebastiano Battiato (1), Oliver Giudice (1), Francesco Guarnera (1), Giovanni Puglisi (2) ((1) University of Catania, (2) University of Cagliari)
• Abstract summary: First Quantization Estimation (FQE) could be performed in order to obtain source camera model identification (CMI) In this paper, a method able to estimate the first quantization factors for JPEG double compressed images is presented, employing a mixed statistical and Machine Learning approach.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The exploitation of traces in JPEG double compressed images is of utter importance for investigations. Properly exploiting such insights, First Quantization Estimation (FQE) could be performed in order to obtain source camera model identification (CMI) and therefore reconstruct the history of a digital image. In this paper, a method able to estimate the first quantization factors for JPEG double compressed images is presented, employing a mixed statistical and Machine Learning approach. The presented solution is demonstrated to work without any a-priori assumptions about the quantization matrices. Experimental results and comparisons with the state-of-the-art show the goodness of the proposed technique.

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