Image Forgery can be largely divided into two sub categories: (1) Copy Move Forgery (2) Image Splicing
Copy Move Forgery
Copy Move forgery is a process of making a composite picture by cutting some object from image and adding it to the same image.
Image Splicing
Image Splicing is a process of making a composite picture by cutting some object from image and adding it to the some other image.
Image Splicing is comparatively harder to detect than copy move forgery because it is easy to detect similar contours of object in the same image as they will have the same texture,transitions(curves and lines),size,etc whereas in case of image splicing different objects are introduced with different texture and image feature complexity,hence making it difficult to detect. In next article ,we will be discussing about image splicing detection procedure.