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Proceedings Paper

Optic disc segmentation: level set methods and blood vessels inpainting
Author(s): A. Almazroa; Weiwei Sun; Sami Alodhayb; Kaamran Raahemifar; Vasudevan Lakshminarayanan
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Paper Abstract

Segmenting the optic disc (OD) is an important and essential step in creating a frame of reference for diagnosing optic nerve head (ONH) pathology such as glaucoma. Therefore, a reliable OD segmentation technique is necessary for automatic screening of ONH abnormalities. The main contribution of this paper is in presenting a novel OD segmentation algorithm based on applying a level set method on a localized OD image. To prevent the blood vessels from interfering with the level set process, an inpainting technique is applied. The algorithm is evaluated using a new retinal fundus image dataset called RIGA (Retinal Images for Glaucoma Analysis). In the case of low quality images, a double level set is applied in which the first level set is considered to be a localization for the OD. Five hundred and fifty images are used to test the algorithm accuracy as well as its agreement with manual markings by six ophthalmologists. The accuracy of the algorithm in marking the optic disc area and centroid is 83.9%, and the best agreement is observed between the results of the algorithm and manual markings in 379 images.

Paper Details

Date Published: 13 March 2017
PDF: 7 pages
Proc. SPIE 10138, Medical Imaging 2017: Imaging Informatics for Healthcare, Research, and Applications, 1013806 (13 March 2017); doi: 10.1117/12.2254174
Show Author Affiliations
A. Almazroa, King Abdullah International Medical Research Ctr. (Saudi Arabia)
Univ. of Michigan (United States)
Weiwei Sun, Wuhan Univ. (China)
Sami Alodhayb, Bin Rushed Ophthalmic Ctr. (Saudi Arabia)
Kaamran Raahemifar, Ryerson Univ. (Canada)
Vasudevan Lakshminarayanan, Univ. of Waterloo (Canada)

Published in SPIE Proceedings Vol. 10138:
Medical Imaging 2017: Imaging Informatics for Healthcare, Research, and Applications
Tessa S. Cook; Jianguo Zhang, Editor(s)

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