A simple boundary extraction technique for irregular pupil localization with orthogonal polynomials

Authors:
R. Krishnamoorthi;G. Annapoorani
Affiliations:
Image Research and Information Science Laboratory, Department of Computer Science and Engineering, Bharathidasan Institute of Technology, Anna University of Technology, Tiruchirappalli 620 024, In ...;Image Research and Information Science Laboratory, Department of Computer Science and Engineering, Bharathidasan Institute of Technology, Anna University of Technology, Tiruchirappalli 620 024, In ...
Venue:
Computer Vision and Image Understanding
Year:
2012

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Abstract

A simple boundary extraction technique for irregular pupil boundary localization is proposed in this paper by designing a new Where-to-go approach that extracts the irregular pupil boundary points from the edge map. Initially, the input eye image is subjected to the orthogonal polynomials model and then Hartley's statistical hypothesis testing is employed to separate out the responses towards noise from those towards strong edges in the eye image. Then the proposed boundary extraction technique is employed to extract the pupil boundary points perfectly and it is independent of the specific eye image characteristics such as pupil deformation, poor contrast, poor brightness, etc. The proposed approach is adaptable to all monochrome databases and exhibits encouraging results when compared with the existing techniques.