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International Journal of Engineering and Manufacturing(IJEM)

ISSN: 2305-3631 (Print), ISSN: 2306-5982 (Online)

Published By: MECS Press

IJEM Vol.6, No.6, Nov. 2016

A Discriminative Statistical Model for Digital Image Forgery Detection

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Author(s)

Amira Baumy, Naglaa. F Soiliman, Mahmoud Abdalla, Fathi Abd El-Samie

Index Terms

Forgery detection;Homomorphic filter;image histogram

Abstract

The headway of modern technology and facility to use processing software leads to tamper and implicate of digital images. This tampering is being performed without leaving any a clear effect noted with the naked eye. The discrimination between different authentic and forged images can be based on its Probability Density Functions (PDFs). This paper introduces a new model for digital image forgery detection. This framework has two main phases; training and testing. In the training phase, the peak is calculated for the derivatives histogram of the illumination components by using homomorphic filter to separate the illumination components on each image. Firstly, the derivative of illumination histogram for authentic and forged images is calculated then the PDFs are estimated for authentic and forged images, finally the threshold is determined. In the testing phase, the determined threshold is tested with realistic dataset followed by using the selected bins for feature calculation in the prediction process. In the final prediction step, a detection and decision process is performed to obtain performance of the new model. This new model is provided a very effective performance. Different color image contrast systems RGB and HIS are studied and utilized for testing our model and compare between each channel for two systems to estimate performance and obtain more sensitive channel.

Cite This Paper

Amira Baumy, Naglaa. F Soiliman, Mahmoud Abdalla, Fathi Abd El-Samie,"A Discriminative Statistical Model for Digital Image Forgery Detection", International Journal of Engineering and Manufacturing(IJEM), Vol.6, No.6, pp.1-14, 2016.DOI: 10.5815/ijem.2016.06.01

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