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Department of Computer Science Seminar
2012 Series

An Analysis of IrisCode and its Applications

Dr. Adams Wai Kin Kong
Assistant Professor
Nanyang Technological University

Date: November 20, 2012 (Tuesday)
Time: 10:30 - 11:30 am
Venue: SCT909, Cha Chi Ming Science Tower, Ho Sin Hang Campus

IrisCode representing an iris image based on coarse Gabor phase is the most influential iris recognition algorithm. A thorough understanding of IrisCode is essential, because over 100 million persons have been enrolled by this algorithm and many biometric personal identification and template protection methods have been developed based on IrisCode. In this talk, I will show the following points: IrisCode is a clustering algorithm with four prototypes and a compression algorithm; the Gabor function can be regarded as a phase-steerable filter; the locus of a Gabor function is a two-dimensional ellipse with respect to a phase parameter and can often be approximated by a circle; the bitwise hamming distance can be considered a bitwise phase distance; and Gabor filters can be utilized as a Gabor atom detector, and the magnitude and phase of a target Gabor atom can be approximated by the magnitude and phase of the corresponding Gabor response. The impacts of these theoretical findings on privacy and security will also be discussed.

Dr. Adams Wai Kin Kong received the B.Sc. degree with Scholastic Award from the Hong Kong Baptist University, the M.Phil. degree from the Hong Kong Polytechnic University and the Ph.D. degree from the University of Waterloo, Canada. Currently, he is an assistant professor at the Nanyang Technological University, Singapore and director of the Forensics and Security Laboratory. His papers have been published in TPAMI, TIP, TIFS, TSMC, TCSVT, CVPR and Pattern Recognition and cited over 2000 times. One of his papers was selected as a spotlight paper by TPAMI and another one was selected as Honorable Mention by Pattern Recognition. With his students, he received Honeywell Best Student Paper Award in The IEEE Fifth International Conference on Biometrics: Theory, Applications and Systems, 2012. In the summer of 2008, he served as an expert witness to the U.S. Department of Justice for a case of child sexual abuse. He has developed seven patents; four of his patents have been approved, and the others have been filed. His research interests include biometrics, forensics, image processing and pattern recognition.

********* ALL INTERESTED ARE WELCOME ***********
(For enquiry, please contact Computer Science Department at 3411 2385)
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Department of Computer Science, Hong Kong Baptist University
Hong Kong Baptist University