Fusing shrinking and expanding active contour models for robust IRIS segmentation

Nguyen Thanh, Kien, Fookes, Clinton B., & Sridharan, Sridha (2010) Fusing shrinking and expanding active contour models for robust IRIS segmentation. In Boashash, Boualem, Hamila, Ridha, Salleh, Sheikh Hussain Shaikh, & Bakar, Syed Abd Rahman Abu (Eds.) Proceedings of 10th International Conference on Information Science, Signal Processing and their Applications, IEEE, Renaissance Hotel, Kuala Lumpur, pp. 185-188.

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The performance of iris recognition systems is significantly affected by the segmentation accuracy, especially in non- ideal iris images. This paper proposes an improved method to localise non-circular iris images quickly and accurately. Shrinking and expanding active contour methods are consolidated when localising inner and outer iris boundaries. First, the pupil region is roughly estimated based on histogram thresholding and morphological operations. There- after, a shrinking active contour model is used to precisely locate the inner iris boundary. Finally, the estimated inner iris boundary is used as an initial contour for an expanding active contour scheme to find the outer iris boundary. The proposed scheme is robust in finding exact the iris boundaries of non-circular and off-angle irises. In addition, occlusions of the iris images from eyelids and eyelashes are automatically excluded from the detected iris region. Experimental results on CASIA v3.0 iris databases indicate the accuracy of proposed technique.

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ID Code: 31501
Item Type: Conference Paper
Refereed: Yes
Keywords: Iris Segmentation, Iris Recognition, Active Contour Model, Snake, Shrinking and Expanding Active Contour Model
DOI: 10.1109/ISSPA.2010.5605546
ISBN: 9781424471652
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > INFORMATION SYSTEMS (080600)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2010 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 24 Mar 2010 23:10
Last Modified: 29 Feb 2012 14:28

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