Digital Watermarking

When?

Wednesday 24 October 2007, 14:00 to 15:00

Where?

39BB02

Open to:

Staff, Students

Abstract:

Digital watermarking is a technique which allows a picece of secret information, called digital watermark, to be embedded in a piece of media, such as digital audio, video, or image signals and documents, in order to provide various types of security to the host media. A digital watermark is a sequence of binary or bipolar bits taking the forms of copyright ntoices, media authentication code (MAC), digital signature of the media owner or the media itself, or some kind of IDs, depending on its application. Digital watermarking finds applications in the areas of copyright protection (e.g., owner identification, transaction tracking / fingerprinting, copy control), multimedia authentication and integrity verification, broadcasting monitoring, etc. During the talk, firstly, the general idea of digital watermarking is depicted. Secondly, a taxonomy of digital watermarking techniques according to various characteristics of applications and requirements is presented. Finally, examples are demonstrated to reinforce the general idea.

Notes:

Chang-Tsun Li received the Ph.D. degree in computer science from the University of Warwick in 1998. He was an associate professor of the Department of Electrical Engineering at National Defense University, Taiwan, during 1999-2002 and a visiting professor of the Department of Computer Science at U.S. Naval Postgraduate School in the second half of 2001. He is currently an associate professor of the Department of Computer Science at the University of Warwick. His research interests include multimedia security, bioinformatics, image processing, pattern recognition, computer vision and content-based image retrieval. He has involved in the organisation of a number of international conferences and workshops and also served as member of the international program committees for several international conferences.