Digital Image Forensic: A Brief Review

Abstract

24300 images per minute. In most of the cases, these contents are making life easy in some sense. This digital era is also providing high quality image editing applications/softwares that can make changes in images and videos easily. The motivation of these changes may possibly be used to create some rumor, which can influence political, corporate, legal, and personal issues. This demands forensic analysis of images to prove their originality. Previously, when the source is confirmed, the image integrity can be authenticated using digital signature or digital watermark and it is generally called active forensic analysis. Most of the time, the source of an image is unknown, i.e., only the image itself is available to analyze. This type of forensic analysis is called blind or passive. In current scenario, the techniques based on passive forensic analysis are more relevant. In this review article, we emphasis on passive forensic analysis techniques [1-11] and their challenges.