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Detecting Optic Disc on Asians by Multiscale Gaussian Filtering
Joint Authors
You, Jane
Karray, Fakhreddine
Zhang, Bob
Source
International Journal of Biomedical Imaging
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-26
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The optic disc (OD) is an important anatomical feature in retinal images, and its detection is vital for developing automated screening programs.
Currently, there is no algorithm designed to automatically detect the OD in fundus images captured from Asians which are larger and have thicker vessels compared to Caucasians.
In this paper, we propose such a method to complement current algorithms using two steps: OD vessel candidate detection and OD vessel candidate matching.
The first step is achieved with multiscale Gaussian filtering, scale production, and double thresholding to initially extract the vessels' directional map of various thicknesses.
The map is then thinned before another threshold is applied to remove pixels with low intensities.
This result forms the OD vessel candidates.
In the second step, a Vessels' Directional Matched Filter (VDMF) of various dimensions is applied to the candidates to be matched, and the pixel with the smallest difference designated the OD center.
We tested the proposed method on a new database consisting of 402 images from a diabetic retinopathy (DR) screening programme consisting of Asians.
The OD center was successfully detected with an accuracy of 99.25% (399/402).
American Psychological Association (APA)
Zhang, Bob& You, Jane& Karray, Fakhreddine. 2012. Detecting Optic Disc on Asians by Multiscale Gaussian Filtering. International Journal of Biomedical Imaging،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-493822
Modern Language Association (MLA)
Zhang, Bob…[et al.]. Detecting Optic Disc on Asians by Multiscale Gaussian Filtering. International Journal of Biomedical Imaging No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-493822
American Medical Association (AMA)
Zhang, Bob& You, Jane& Karray, Fakhreddine. Detecting Optic Disc on Asians by Multiscale Gaussian Filtering. International Journal of Biomedical Imaging. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-493822
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-493822