Digital image forgery detection techniques: a survey

From the early days, images are being generally accepted as a proof of occurrence of the past events. The availability of low cost hardware and software tools makes easy to create and manipulate digital images with no obvious traces. With this consequence the Digital Image Forgeries are growing at an alarming rate in different application fields and have made negative marking to accept the integrity and authenticity of the digital images. Technology has been innovated to check the originality of the digital images. Researchers have proposed various techniques in this field in recent years. This survey attempts to cover the techniques that have been proposed for exposing digital image forgeries.