BLOCK BASED IMAGE FORGERY DETECTION TECHNIQUES

Since the day o f an advent of the internet and the World Wide Web digital images started playing an important role in exchanging ideas and sharing the information. Today it’s hard to imagine the world of web without digital images right from simple personal web page to g iant web applications. Mobile applications like WhatsApp also became the important means of the communication on which very often multimedia content is used to spread the word. But at the same time these digital images are vulnerable in the sense that, it can be easily manipulated to conceal or change the meaning. It could be dangerous, if these forgeries been done with malicious intentions. Hence it’s very important to know and prove the authenticity of the digital images. From last few years, research com munity is contributing towards addressing this issue. In this survey paper we are presenting a review on copy - move forgery detection by dividing the image into the block of particular size and processing these blo cks to identify the forgeries