Digital Image Forensics
- When?
- Wednesday 1 August 2007, 14:00 to 15:00
- Where?
- 39BB02
- Open to:
- Staff, Students
Professor Yun Q Shi, New Jersey Institute of Technology
Abstract:
In our digital age, digital media have been being massively produced, easily manipulated, and swiftly transmitted to almost anywhere in the world at anytime. While the great convenience has been appreciated, information assurance has become an urgent and critical issue faced by the digital world. The data hiding, cryptography, and combination of both have been shown not sufficient in many applications. Digital data forensics, which gathers evidence of data composition, origin, and history, is hence called for. Although this new research field is still in its infancy stage, it has started to attract increasing attention from the multimedia-security research community.
In this tutorial, firstly, blind and passive image splicing/tampering detection is addressed. After pointing out the urgency of this task, the state-of-the-art technologies are presented. The existing problems and future research subjects are discussed. Secondly, the issue of detection of JPEG compression history for bmp images is addressed. It is shown that a generalized Benford law, also known as the first digit law, can play an important role in this forensics task. For example, it can be effectively used for JPEG double compression detection. Finally, other tasks in forensics are briefly discussed.
Notes:
Professor Yun Q Shi joined the Department of Electrical and Computer Engineering at the New Jersey Institute of Technology since 1987. He obtained his B.S. degree and M.S. degree from the Shanghai Jiao Tong University, Shanghai, China; his M.S. and Ph.D. degrees from the University of Pittsburgh, P.A.. He is a leading researcher in the field of multimedia security, contributing in the region of 200 authored and co-authored papers in top ranking conferences and journals, 18 patents and 1 book. He is also a Fellow of the IEEE. Professor Shi is currently visiting the Department of Computing, University of Surrey sponsored by the Royal Society's North America Short Visits Grant. From more biographical information please refer to http://web.njit.edu/~shi/.
