In-Depth DCT Coefficient Distribution Analysis for First Quantization Estimation

08/07/2020
by   Sebastiano Battiato, et al.
43

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.

READ FULL TEXT
research
04/10/2021

Q-matrix Unaware Double JPEG Detection using DCT-Domain Deep BiLSTM Network

The double JPEG compression detection has received much attention in rec...
research
12/01/2020

Boosting CNN-based primary quantization matrix estimation of double JPEG images via a classification-like architecture

The problem of estimation of the primary quantization matrix in double J...
research
06/23/2018

Robust Image Identification for Double-Compressed JPEG Images

It is known that JPEG images uploaded to social networks (SNs) are mostl...
research
07/15/2020

Image De-Quantization Using Generative Models as Priors

Image quantization is used in several applications aiming in reducing th...
research
01/31/2021

A Machine Learning Approach to Optimal Inverse Discrete Cosine Transform (IDCT) Design

The design of the optimal inverse discrete cosine transform (IDCT) to co...
research
02/02/2021

Image Splicing Detection, Localization and Attribution via JPEG Primary Quantization Matrix Estimation and Clustering

Detection of inconsistencies of double JPEG artefacts across different i...
research
06/28/2016

Adaptive Training of Random Mapping for Data Quantization

Data quantization learns encoding results of data with certain requireme...

Please sign up or login with your details

Forgot password? Click here to reset