Investigational Study of Image Forensic Applications, Techniques and Research Directions

In the age of information and internet technology, images and videos having superior usage in various applications either for information sharing or authentication. The task of image manipulation has been simplified by the advances in digital imaging techniques. Nowadays many image editing tools can alter the features of an image, which is impossible to notice by naked eyes. Therefore the Reliability of digital images is undermined. The credibility of the digital images is an important issue because digital images are used in various applications like in military, law enforcement, intelligence, surveillance, etc. Three most common forgery types are splicing, copy/move and retouching. There is an area called image forensic which is having a similar notion as cryptanalyst, which is aimed to find the tampering in an image; it's nature, and its location. Many techniques and algorithms have been proposed such as cryptography, digital watermarking, and digital signatures. The aim of the paper is to present a survey and comparisons of the various image authentication methods. Keywordst-Digital watermarking, Digital Image Processing Image forensic, Image Retouching ,Image splicing,