A Brief Introduction to Digital Watermarking

From Last few year, internet became the first priority of everyone. It is a very easy and fast way to transfer and access data and information throughout the world. This information basically in the form of digital data (text, images, audio, video). Everyone using internet for their personal or professional use. Due to this it is important to protect user data from unauthorized access. When we talk about copy right protection means unauthorized person claim that copied data is created by him. What we do at that time? How can we prove that we are the right owner of data? to overcome this problem Digital watermarking mechanism is used in since to protect data from illegal copies or illegal distribution. It is a art of hiding information into digital data in a way , unauthorized person can’t access or copy that data for misuse. Data which is insert into digital media is called watermark. It is a information (any label, citations, author name, id) about data. the proposed paper is an analysis of new enhancements in digital image watermarking techniques in both spatial domain and transform domain. Key wordsTransform domain, Digital image watermarking, DCT, DWT, DFT, SVD, spatial domain.