Color Image Steganalysis Based On Steerable Gaussian Filters Bank

Hasan Abdulrahman 1 Marc Chaumont 2 Philippe Montesinos 1 Baptiste Magnier 1
2 ICAR - Image & Interaction
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : This article deals with color images steganalysis based on machine learning. The proposed approach enriches the features from the Color Rich Model by adding new features obtained by applying steerable Gaussian filters and then computing the co-occurrence of pixel pairs. Adding these new features to those obtained from Color-Rich Models allows us to increase the detectability of hidden messages in color images. The Gaussian filters are angled in different directions to precisely compute the tangent of the gradient vector. Then, the gradient magnitude and the derivative of this tangent direction are estimated. This refined method of estimation enables us to unearth the minor changes that have occurred in the image when a message is embedded. The efficiency of the proposed framework is demonstrated on three stenographic algorithms designed to hide messages in images: S-UNIWARD, WOW, and Synch-HILL. Each algorithm is tested using different payload sizes. The proposed approach is compared to three color image steganal-ysis methods based on computation features and Ensemble Classifier classification: the Spatial Color Rich Model, the CFA-aware Rich Model and the RGB Geometric Color Rich Model.
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Hasan Abdulrahman, Marc Chaumont, Philippe Montesinos, Baptiste Magnier. Color Image Steganalysis Based On Steerable Gaussian Filters Bank. IH&MMSec: Information Hiding and Multimedia Security, Jun 2016, Vigo, Galicia, Spain. pp.109-114, ⟨10.1145/2909827.2930799⟩. ⟨hal-01374101⟩

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