An Active Approach based on Independent Component Analysis for Digital Image Forensics

Advancements in digital imaging technologies has elevated many new issues and challenges concerning the authenticity and integrity of digital images. Digital images can now be easily captured and edited for creating forgery without leaving any obvious clues of such operations. These capabilities undermine the credibility of digital images in all aspects. Digital image forensics is has gained tremendous importance in last one decade among the research community. Digital Image Forensics (DIF) aims at determining the origin and potential authenticity of a digital images. One of the fundamental problems digital image forensics techniques attempt to solve is the identification of the source of a digital image. In case if the image is challenged in the court of the law it is very important to prove and identify the original image from the tampered and forged one. In this paper we present an active approach which is based on Independent Component Analysis (ICA). The experiments carried out proves that the ICA can be used as an effective and robust tool for identifying the original image from the forged one. Keywords— digital image forensics, image forgery, image security, Image Authentication, Active Forgery detection.