Completely Contactless Finger Knuckle Detection and Identification for Real World Applications

By Ajay Kumar, The University of Hong Kong, Hong Kong.


Finger knuckle patterns are highly unique and correlated with the anatomy of fingers that involve a complex interaction of finger phalanx bones, tissues, and interphalangeal joints. Such patterns are increasingly employed for forensic identification, by the FBI and other law enforcement departments in the world, especially when knuckle patterns are only the piece of available evidence to identify the suspects. Unrelenting hygienic concerns to stop the spread of COVID19 and the wide availability of smartphones have attracted renewed attention to developing completely contactless finger knuckle identification capabilities. During this talk, our discussion will focus to uncover enormous potential from various finger knuckle patterns for completely contactless and online personal identification. We will also discuss the stability of knuckle patterns, from a database acquired at several years of intervals, among individuals from different age groups. The effectiveness of knuckle minutiae and other feature extraction algorithms will also be analyzed. Experimental results from contactless finger knuckle databases, including those from over 700 different subjects, will also be presented. During this talk, I will also present a live demonstration of the world’s first completely contactless and online finger-knuckle identification system which has been developed at PolyU.


Ajay Kumar received a Ph.D. degree from The University of Hong Kong, Hong Kong, in 2001. He was an Assistant Professor with the Department of Electrical Engineering, IIT Delhi, Delhi, India, from 2005 to 2007. He is currently working as a Professor with the Department of Computing, The Hong Kong Polytechnic University. His current research interests are in biometrics with an emphasis on hand biometrics, vascular biometrics, iris, and multimodal biometrics. He holds seven U.S. patents, and has authored a book on ‘Contactless 3D Fingerprint Identification’. He is currently serving on the Editorial Board of IEEE Transactions on Pattern Analysis and Machine Intelligence and was on the Editorial Board of the IEEE Transactions on Information Forensics and Security from 2010-2013. Dr. Ajay Kumar served on the program committees of several international conferences, recently as an area chair for ECCV 2022, CVPR 2022-2019, and program chair for CVPR 2013-2022 Biometrics Workshops. He has also served as the General Co-Chair of the IJCB 2014 (Tampa), ISBA 2015 (Hong Kong), and General Chair for WIFS 2018 held in Hong Kong. Dr. Kumar has served on the IEEE Biometrics Council as the vice president for publications from 2011-2015, and currently serving as its President. He is a Fellow of IAPR and IEEE.

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