An effective iris localization method through enhancement of boundary detail

Authors:
Sai Jiang;Gang Xiao;Fei Gao;Hui-Qiang Lv;Yuan-Ming Zhang
Affiliations:
College of Information Engineering, Zhejiang University of Technology, HangZhou, Zhejiang Province, China;College of Information Engineering, Zhejiang University of Technology, HangZhou, Zhejiang Province, China;College of Information Engineering, Zhejiang University of Technology, HangZhou, Zhejiang Province, China;College of Information Engineering, Zhejiang University of Technology, HangZhou, Zhejiang Province, China;College of Information Engineering, Zhejiang University Of Technology, HangZhou, Zhejiang Province, China
Venue:
ACOS'06 Proceedings of the 5th WSEAS international conference on Applied computer science
Year:
2006

Citing 2
Cited 1

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Image transmission through incoherent optical fiber bundle: methods for optimization and image quality improvement

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Abstract

The personal identification based on biometric has received much achievement nowadays, iris recognition is regarded as a potential one for its high reliability and accuracy. In iris recognition system, localization of the iris determine the accuracy of the iris recognition result, which also becomes the fundamental preprocessing of iris recognition. In this paper, we present an improved inner and outer iris localization method and a method for iris image quality assessment. For the boundary of an iris can be considered to be circle and the intensity of the pupil distributes equably, this paper presents a geometrical method based on circle vertical bisector intersection points to localize iris inner boundary and the center of the circle. As the boundary of the iris and sclera is usually blurry, the paper also proposes a method based on outer boundary details enhancement and finally the Hough transform operator is carried to localize the outer boundary of iris. Experiment results prove the arithmetic is stable, efficient and speedy.