Journal of Digital Image Processing and Computer Vision

Authors: Priyanka Jeswani, Manisha Kumari Rajoriya, Kanika Sharma

Abstract: In Internet world, there is a need for copyright protection of digital content. Even if it is a video files uploaded over websites. Watermarking algorithms have a basic requirement that the watermark should be imperceptible to avoid being detected and not cause visible distortion to the viewer. In this paper we aim to present a survey of two different techniques on digital image watermarking. Digital watermarking is used as a key solution to make the data transferring secure from illegal interferences. Digital watermark techniques are used in various areas such as copyright protection, broadcast monitoring and owner identification. In this paper we mainly discussed about two methods by frequency domain and spatial domain. In frequency domain such as DCT, DWT the watermark is inserted into transformed coefficients of image giving more information hiding capacity and more robustness against watermarking attacks. In spatial domain, watermark is inserted directly by modifying the pixel values of host image.