A Methodological Review on Copy-Move Forgery Detection for Image Forensics

Copy-Move forgery is the very prevalent form of image tampering. The powerful image processing tools available freely helps even the naive to tamper with images. A copy-move forgery is performed by copying a region in an image and pasting it in the same image most probably after applying some form of post-processing on the region like rotation, blurring, scaling, double JPEG compression etc. This makes it difficult to develop one common technique to detect copy-move forgery. As a result a considerable number of methods have been developed in view to detect different forms of copy-move forgeries. Those techniques can be classified generally as block based techniques and keypoint based techniques. This paper presents an extensive survey on the very recent methods developed for copy-move forgery detection. A Methodological Review on Copy-Move Forgery Detection for Image Forensics