Classification and Comparison of Digital Image Watermarking Techniques

Abstract — Watermarking is a technique to hide information inside digital media so that any unauthorized person can’t access it. It is a very important field which helps to protect copywrite digital material. This is exponentially growing field in today’s world as information sharing has become much easier due to internet. Many researchers are studying and researching in this field. Using this technique, digital data that is watermarked can be accessed and modified by authorized person only. There are different techniques available so far for watermarking in digital image. This paper provides analytical survey on digital image watermarking based on their representation domain. Comparison has been made between frequency domain and spatial domain