From Image Recovery to Video Transmission

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• Professor Aggelos K. Katsaggelos, Northwestern University, Department of EECS, Evanston, IL 60208
• Tuesday 17 November 2009, 14:00-15:00
• Room 403a.

If you have a question about this talk, please contact Glenys Benson.

In this presentation, work performed at the Image and Video Processing Laboratory will be described. Special attention will be paid to two topics, that of image and video recovery and video transmission.  With respect to the first topic, there is a plethora of image and video processing applications in which information is lost due to acquisition, processing, or transmission. These applications include astronomical imaging, commercial and entertainment photography, medical imaging, and molecular and cellular bio-imaging. A recovery problem is then required to be solved, according to which an estimate of the original scene is obtained based on the observed data and prior knowledge about the original image and the degradation process. Examples of such problems include image and video restoration, super-resolution, the removal of compression and transmission artifacts, compressive sensing and light field estimation in computational photography. We describe in detail some of the recent advances and outstanding challenges in image recovery utilizing a Bayesian framework.  With respect to the second topic, supporting video communication over lossy channels such as wireless networks is a challenging task due to the stringent quality of service (QoS) required by video applications and the many channel impairments. Two important QoS characteristics for video are the degree of signal distortion and the transmission delay. In this presentation we consider a cross-layer resource-utility allocation and scheduling framework for balancing the requirements of different applications. We describe some of the opportunities and challenges in designing and developing video communication systems.

Bio:  Prf. Katsaggelos received the Diploma degree in electrical and mechanical engineering from the Aristotelian University of Thessaloniki, Greece, in 1979 and the M.S. and Ph.D. degrees both in electrical engineering from the Georgia Institute of Technology, in 1981 and 1985, respectively. In 1985, he joined the Department of Electrical Engineering and Computer Science at Northwestern University, where he is currently professor. He was the holder of the Ameritech Chair of Information Technology 1997-2003. He is also the Director of the Motorola Center for Seamless Communications, a member of the Academic Affiliate Staff at NorthShore University Health System, a faculty affiliate in the Department of Linguistics and an academic appointee at the Argonne National Laboratory.

This talk is part of the COMMSP Seminar series.

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