Non‐ideal iris segmentation using anisotropic diffusion. Issue 2 (1st March 2013)

• Record Type: Journal Article
• Authors: Wan, Hong‐Lin; Li, Zhi‐Cheng; Qiao, Jian‐Ping; Li, Bao‐Sheng
• Is Part Of: IET image processing. Volume 7:Issue 2(2013)
• Page Start: 111
• Page End: 120
• Publication Date: 2013-03-01
• Subjects: image segmentation -- iris recognition -- statistical analysis; nonideal iris segmentation -- anisotropic diffusion -- iris recognition -- circle‐based iris segmentation -- Laplace pyramid -- morphologic operation -- curve evolution -- order statistical filter -- sclera; image segmentation -- iris recognition -- statistical analysis; nonideal iris segmentation -- anisotropic diffusion -- iris recognition -- circle‐based iris segmentation -- Laplace pyramid -- morphologic operation -- curve evolution -- order statistical filter -- sclera; Image processing -- Periodicals; 621.36705
• DOI: 10.1049/iet-ipr.2012.0084
• Languages: English
• ISSNs: 1751-9659

Abstract

Abstract : Iris segmentation is critical for iris recognition. In this study, the authors present a circle‐based iris segmentation method for non‐ideally captured iris by employing anisotropic diffusion. Our proposal consists of two component steps by which interior and exterior boundaries are localised, respectively. To save computational load, Laplace pyramid (LP) framework is incorporated into both steps. During the first step, when iris has been decomposed into the coarse level by LP, reflections will be removed by anisotropic diffusion and morphologic operations. In the second step, the authors present the innovated curve evolution to detect exterior boundary. Moreover, order statistical filters are employed to enhance the contrast of iris and sclera. Experimental results depict a high correct ratio of segmentation that is more than 96.90% thereby validating the proposed approach.