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Reseach Article

Active Contour without Edges vs GVF Active Contour for Accurate Pupil Segmentation

by Walid Aydi, Nouri Masmoudi, Lotfi Kamoun
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 54 - Number 4
Year of Publication: 2012
Authors: Walid Aydi, Nouri Masmoudi, Lotfi Kamoun
10.5120/8555-2118

Walid Aydi, Nouri Masmoudi, Lotfi Kamoun . Active Contour without Edges vs GVF Active Contour for Accurate Pupil Segmentation. International Journal of Computer Applications. 54, 4 ( September 2012), 25-36. DOI=10.5120/8555-2118

@article{ 10.5120/8555-2118,
author = { Walid Aydi, Nouri Masmoudi, Lotfi Kamoun },
title = { Active Contour without Edges vs GVF Active Contour for Accurate Pupil Segmentation },
journal = { International Journal of Computer Applications },
issue_date = { September 2012 },
volume = { 54 },
number = { 4 },
month = { September },
year = { 2012 },
issn = { 0975-8887 },
pages = { 25-36 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume54/number4/8555-2118/ },
doi = { 10.5120/8555-2118 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:54:50.866454+05:30
%A Walid Aydi
%A Nouri Masmoudi
%A Lotfi Kamoun
%T Active Contour without Edges vs GVF Active Contour for Accurate Pupil Segmentation
%J International Journal of Computer Applications
%@ 0975-8887
%V 54
%N 4
%P 25-36
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Iris localization is a critical step for an iris recognition system because it directly affects the recognition rates. Consequently, in order to have reasonably accurate measures, we should estimate as many iris boundaries as possible which are defined by papillary and ciliary regions. Due to the contraction which is an intrinsic propriety of the pupil and the variations in the shooting angle, the pupil will not be a regular circle. So an active contour is suitable to accurately locate the iris boundaries. In this paper we focused on iris/pupil boundary and we proposed a new algorithm based on an active contour without edges applied in gray level image. First, we develop a new method to locate and fill the corneal reflection which is used not only to remove the highlight points that appear inside the pupil but also as an initial contour generator for the snake. Second, we propose to use the active contour without edges for precise pupil segmentation. This kind of snake can detect objects whose boundaries are not necessarily defined by gradient. Our algorithm seems to be robust to occlusion, specular reflection, variation in illumination and improves its efficiency in precision and time computation compared with AIPF and Gvf active contour. Another advantage is that the initial curve can be anywhere in the image and the contour will be automatically detected. The proposed algorithm is 2. 36 faster than GVF snake-based method for accurate pupil contour detection and integro-differential method with accuracy up to 99. 62% using CASIA iris database V3. 0 and up to 100% with CASIA iris database V1. 0.

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Index Terms

Computer Science
Information Sciences

Keywords

Iris pupil snake specular reflection active contour without edges