[CPCC] Distinguished Seminar by Prof. Michael W. Marcellin

Hamid Jafarkhani hamidj at uci.edu
Mon Apr 21 11:20:12 PDT 2014


Title: Visually-Lossless JPEG2000 for Interactive Multi-Resolution Delivery of Imagery

Speaker: Michael W. Marcellin

Date: Monday, May 19, 2014

Time: 11:00 AM

Venue: Harut Barsamian Colloquia (Engineering Hall 2430)

ABSTRACT

Visibility thresholds play an important role in finding appropriate quantization step sizes in image and video compression systems. After a brief tutorial on the JPEG2000 standard, we present a method of measuring visibility thresholds for quantization distortion in JPEG2000. A quantization distortion model for each subband is developed based on the statistical characteristics of wavelet coefficients and the dead-zone quantizer of JPEG2000. This is in contrast to previous studies which have assumed uniform quantization distortion. The resulting visibility thresholds are further adjusted for locally changing backgrounds through a visual masking model, and then used to determine the minimum number of coding passes to be included in a JPEG2000 codestream for visually lossless quality. In our experiments, the proposed coding scheme achieves visually lossless coding for 24-bit color images at approximately 20% of the bitrate required for numerically lossless coding.

JPEG2000 inherently supports the display of imagery at various resolutions. When an image is displayed at dif¬ferent resolutions, the spatial frequencies of subbands are changed. Previous JPEG2000 visually lossless algo¬rithms have employed a single set of visibility thresholds optimized for full resolution. This generally results in visually lossless quality at all resolutions, but with significant inefficiencies at less than full resolution. In this talk we discuss a method to minimize the amount of data needed for display at lower resolutions. Specifically, we present a layering strategy which effectively incorporates a different set of visibility thresholds for each resolution. This allows for visually lossless decoding at a variety of resolutions, using only a fraction of the full resolution codestream.

All codestreams produced using the methods described in this talk are fully JPEG2000 Part-I compliant.
Joint work with Han Oh and Ali Bilgin

SPEAKER'S BIOGRAPHY

Michael W. Marcellin was born in Bishop, California, on July 1, 1959. He graduated summa cum laude with the B.S. degree in Electrical Engineering from San Diego State University in 1983, where he was named the most outstanding student in the College of Engineering. He received the M.S. and Ph.D. degrees in Electrical Engineering from Texas A&M University in 1985 and 1987, respectively.

Since 1988, Dr. Marcellin has been with the University of Arizona, where he holds the title of Regents' Professor of Electrical and Computer Engineering, and of Optical Sciences. His research interests include digital communication and data storage systems, data compression, and signal processing. He has authored or coauthored more than two hundred publications in these areas.

Dr. Marcellin is a major contributor to JPEG2000, the emerging second-generation standard for image compression. Throughout the standardization process, he chaired the JPEG2000 Verification Model Ad Hoc Group, which was responsible for the software implementation and documentation of the JPEG2000 algorithm. He is coauthor of the book, JPEG2000: Image compression fundamentals, standards and practice, Kluwer Academic Publishers, 2002. This book serves as a graduate level textbook on image compression fundamentals, as well as the definitive reference on JPEG2000. Dr. Marcellin served as a consultant to Digital Cinema Initiatives (DCI), a consortium of Hollywood studios, on the development of the JPEG2000 profiles for digital cinema.

Professor Marcellin is a Fellow of the IEEE, and is a member of Tau Beta Pi, Eta Kappa Nu, and Phi Kappa Phi. He is a 1992 recipient of the National Science Foundation Young Investigator Award, and a corecipient of the 1993 IEEE Signal Processing Society Senior (Best Paper) Award. He has received teaching awards from NTU (1990, 2001), IEEE/Eta Kappa Nu student sections (1997), and the University of Arizona College of Engineering (2000, 2010). In 2003, he was named the San Diego State University Distinguished Engineering Alumnus. Professor Marcellin is the recipient of the 2006 University of Arizona Technology Innovation Award. He was finalist for the 2012 Arizona Governor's Innovation Awards. From 2001 to 2006, Dr. Marcellin was the Litton Industries John M. Leonis Distinguished Professor of Engineering. He is currently the International Foundation for Telemetering Chaired Professor of Electrical and Computer Engineering at the University of Arizona.



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