Copyright Protection Of Multimedia Documents: From Theory To Application

Transmission, manipulation and storage of images in digital format is rapidly becoming an everyday practice. Desktop publishing, digital libraries, image databases and the World Wide Web are only some of the application areas that are strongly related to digital imaging technology. The new digital, networked environment necessitates the development of robust and trustworthy encryption, authentication and copyright protection techniques. In this paper we describe a general framework for image copyright protection through image watermarking. In particular we present the main features of an efficient watermarking scheme, discuss robustness issues and describe the three main stages of a watermarking algorithm namely watermark generation, embedding and detection. 1 INTRODUCTION The rapid evolution of digital technology makes the development of reliable and robust schemes for protecting digital still images, audio and video from piracy a matter of urgency. Piracy attacks include illegal acc..