alexa A Image Forensics Analysis by Using DST, Fuzzy and Bayesian Approaches
ISSN ONLINE(2320-9801) PRINT (2320-9798)

International Journal of Innovative Research in Computer and Communication Engineering
Open Access

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Special Issue Article

A Image Forensics Analysis by Using DST, Fuzzy and Bayesian Approaches

 
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Abstract

A Forensic Image is often accompanied by a calculated Hash signature to validate that the image is an exact duplicate of the original. It is mainly focus on detection of artifacts introduced by single processing tool. Hence making it necessary for developing several for detection of artifacts. In this paper we introduce different theoretical frameworks, based on Dempster-Shafer’s Theory of Evidence, Fuzzy Theory and Bayesian decision fusion respectively, to perform the fusion of heterogeneous, incomplete or conflicting outputs of forensic algorithms. These models are easily expandable to an arbitrary number of tools, do not require tools output to be probabilistic and take into account available information about tools reliability. To validate the proposed approaches, we carried out some experiments addressing a simple yet realistic scenario in which three forensic tools exploit different artifacts introduced by double JPEG compression to detect cut and paste tampering within a specified region of an image. The results we obtained are encouraging, especially when compared with the performance of a simple decision method based on the binary OR operator.

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