Abstract

In this modern world, digital computing plays an important role in representing information as digital images. Due to the considerable improvement in imaging technologies the convenience, cleverness and transmission of digital images is easy today. However, the image editing technology is also being used for manipulating digital images and creating forgeries that are difficult to distinguish from authenticated photographs. Copy move forgery is a type of forgery in digital image forensics. A Gaussian filtering technique along with EM algorithm is proposed in this paper to detect the copy move forged area and its performance is compared with the block based method and keypoint based method. The parameters like precision and recall values are evaluated and plotted.