Paper Info
Title
JPEG Steganography and Synchronization of DCT Coefficients for a Given Development Pipeline
Abstract
This paper proposes to use the statistical analysis of the correlation between DCT coefficients to design a new synchronization strategy that can be used for cost-based steganographic schemes in the JPEG domain. First, an analysis is performed on the covariance matrix of DCT coefficients of neighboring blocks after a development pipeline similar to the one used to generate BossBase, and applied on a photonic noise. This analysis exhibits (i) a decomposition into 8 disjoint sets of uncorrelated coefficients (4 sets per block used by 2 disjoint lattices) and (ii) the fact that each DCT coefficient is correlated with 38 other coefficients belonging either to the same block or to connected blocks. Using the uncorrelated groups, an embedding scheme can be designed using only 8 disjoint lattices. The proposed embedding scheme relies on ingredients. Firstly, we convert the empirical costs associated to one each coefficient into a Gaussian distribution whose variance is directly computed from the embedding costs. Secondly we derive conditional Gaussian distributions from a multivariate distribution considering only the correlated coefficients which have been already modified by the embedding scheme. This covariance matrix takes into account both the correlations exhibited by the analysis of the covariance matrix and the variance derived from the costs. This synchronization scheme enables to obtain a gain of $P_E$ of at least $7%$ at $QF95$ for an embedding rate close to 0.3 bnzac coefficient using DCTR feature sets for both UERD and JUniward.
Year
DOI
Venue
2020
10.1145/3369412.3395074
IH&MMSec '20: ACM Workshop on Information Hiding and Multimedia Security Denver CO USA June, 2020
DocType
ISBN
Citations 
Conference
978-1-4503-7050-9
1
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Taburet Théo110.34
Bas Patrick210.34
Wadih Sawaya3256.35
Rémi Cogranne454530.57