STUDY OF VARIOUS DETECTION TECHNIQUES OF TAMPERED REGIONS IN DIGITAL IMAGE FORENSICS S. Priyadarshini 1 and Dr. S. Miruna Joe Amali 2 I. INTRODUCTION Digital images serve as deciding factors now-a-days for many crucial applications. For instance, they extend their hands in identifying the responsibilities in a crime scene, road accidents etc. They are manipulated illegally for varied intentions with the availability of various softwares, thus leading to the accelerated misuse of those softwares. Digital images that are transmitted through less secure channels are also a source of image alteration. Digital images are often manipulated for illegal needs rather than for legal purposes. Digital watermarking was imposed to diminish the above mentioned threats. But it can't be used to prove the authenticity of an image and its pristine nature cannot be validated. Forgeries in digital images may be done through various ways like performing copy - move forgeries, splicing attacks (to add/remove any component from the image, duplicating certain regions of the image, altering in physical inconsistencies like lighting of geometric features, objects, shadows etc.) Various methods that are available to detect and localize the tampered regions are discussed. Section II elaborates the various methods and their pros and cons. Section III summaries the various methods and conclusion is given in section IV. 1 Department of Computer Science and Engineering K.L.N. College of Engineering, Sivagangai, Tamil Nadu, India 2 Department of Computer Science and Engineering K.L.N. College of Engineering, Sivagangai, Tamil Nadu, India International Journal of Latest Trends in Engineering and Technology Vol.(7)Issue(4), pp.248-253 DOI: http://dx.doi.org/10.21172/1.74.034 e-ISSN:2278-621X Abstract- Availability of various image editing software both online and offline has tremendously proliferated. This has greatly increased the incidences of digital images manipulation for various intentions. Thereby, causing increased threat to the originality and authenticity of the digital images. Originality of digital images is mandatory for many applications like in military, medical etc. There are various detection techniques in the literature for the identification of tampered images. The focus of this paper is to present a review on the various techniques available to find out the manipulated regions in the digital image. Various techniques are described and focus on their comparison according to the properties like tamper detection, localization, selective or strict authentication is performed. Keywords – Random walk, First digit features, Salient object detection, Photo Response Non-Uniformity, splicing attacks.