With the rapid development of multimedia technology and availability of powerful digital media editing tools such as Photoshop, PIXLR etc., it is possible to manipulate (or forge) digital images very easily. For humans, it becomes very difficult to identify visually whether the image is original or manipulated. The detection of image forgery is very important because an image carry’s a lot of important information and can be used as legal evidence in medical imaging, image forensics, news media, and the court of law and in many other fields. There are many techniques to manipulate the digital images such as copy-move, image splicing, resampling and soon. Among them, the common form of image forgery is copy move forgery. In this paper reviews of the various copy-move digital image forgery detection techniques are presented.
