Review of Digital Image Forgery Detection

Abstract

Forgery in digital images can be done by manipulating the digital image to conceal some meaningful or useful information of the image. It can be much difficult to identify the edited region from the original image in various cases. In order to maintain the integrity and authenticity of the image, the detection of forgery in the image is necessary. Adaption of modern lifestyle and advanced photography equipment has made tempering of digital image easy with the help of image editing soft wares. It is thus important to detect such image tempering operations. Different methods exist in literature that divide the suspicious image into overlapped blocks and extract some features from the images to detect the type of forgery that exist in the image. The image forgery detection can be done based on object removal, object addition, unusual color modifications in the image. Many existing techniques are available to overcome this problem but most of these techniques have many limitations. Images are one of the powerful media for communication. In this paper a survey of different types of forgery and digital image forgery detection has been focused.