Paper Info
Title
A Novel Edge-Map Creation Approach for Highly Accurate Pupil Localization in Unconstrained Infrared Iris Images
Abstract
AbstractIris segmentation in the iris recognition systems is a challenging task under noncooperative environments. The iris segmentation is a process of detecting the pupil, iris’s outer boundary, and eyelids in the iris image. In this paper, we propose a pupil localization method for locating the pupils in the non-close-up and frontal-view iris images that are captured under near-infrared (NIR) illuminations and contain the noise, such as specular and lighting reflection spots, eyeglasses, nonuniform illumination, low contrast, and occlusions by the eyelids, eyelashes, and eyebrow hair. In the proposed method, first, a novel edge-map is created from the iris image, which is based on combining the conventional thresholding and edge detection based segmentation techniques, and then, the general circular Hough transform (CHT) is used to find the pupil circle parameters in the edge-map. Our main contribution in this research is a novel edge-map creation technique, which reduces the false edges drastically in the edge-map of the iris image and makes the pupil localization in the noisy NIR images more accurate, fast, robust, and simple. The proposed method was tested with three iris databases: CASIA-Iris-Thousand (version 4.0), CASIA-Iris-Lamp (version 3.0), and MMU (version 2.0). The average accuracy of the proposed method is 99.72% and average time cost per image is 0.727źsec.
Year
DOI
Venue
2016
10.1155/2016/4709876
Periodicals
Field
DocType
Volume
Iris recognition,Computer vision,Computer science,Segmentation,Edge detection,Specular reflection,Pupil,Hough transform,Artificial intelligence,Thresholding
Journal
2016
Issue
ISSN
Citations 
1
2090-0147
1
PageRank 
References 
Authors
0.37
17
3
Name
Order
Citations
PageRank
Vineet Kumar119626.07
Abhijit R. Asati2135.70
Anu Gupta383.99