The automatic measurement of papilla excavation in fundus images
Abstract
Background: Fundus images contain visual information that can help an ophthalmologist diagnose several diseases, including glaucoma. The latter can be easily detected by measuring the optic disc cup in fundus images. The optic disc cup is defined as a C/D ratio, a ratio between the cup diameter and the optic disc diameter.
Methods: In this paper we present a system for an automatic optic disc detection and an automatic C/D measurement which facilitates glaucoma diagnosis made by the ophthalmologist. We have used standard computer vision methods and modified some of them to obtain better results.
Results and conclusions: Described methods were tested on a set of 39 fundus images. Optic disc area was successfully detected in 33 cases. Detection of cupping was 100% successful. The results are very promising and represent a good startingpoint for further development in computer-assisted diagnostics.
Downloads
References
Li H, Chutatape O. Fundus image features extraction. Proceedings of the 22nd Annual EMBS International Conference; 2000 July 23-28; Chicago, USA.
Chernov N, Lesort C. Least squares fitting of circles and lines. January 1, 2003. Dosegljivo na: http://arxiv.org/abs/cs/0301001
Gander W, Golub GH, Strebel R. Least-squares fitting of circles and ellipses. Dosegljivo na: http://www.ulb.ac.be/assoc/bms/Bulletin/sup962/gander.pdf
Kanski JJ. Clinical ophthalmology. Second ed. London: Butterworth-Heinemann; 1993.
Čupak K. Oftalmologija. Zagreb: Nakladni zavod Globus; 1994.
The Author transfers to the Publisher (Zdravniški vestnik/Slovenian Medical Journal) all economic copyrights following form Article 22 of the Slovene Copyright and Related Rights Act (ZASP), including the right of reproduction, the right of distribution, the rental right, the right of public performance, the right of public transmission, the right of public communication by means of phonograms and videograms, the right of public presentation, the right of broadcasting, the right of rebroadcasting, the right of secondary broadcasting, the right of communication to the public, the right of transformation, the right of audiovisual adaptation and all other rights of the author according to ZASP.
The aforementioned rights are transferred non-exclusively, for an unlimited number of editions, for the term of the statutory
The Author can make use of his work himself or transfer subjective rights to others only after 3 months from date of first publishing in the journal Zdravniški vestnik/Slovenian Medical Journal.
The Publisher (Zdravniški vestnik/Slovenian Medical Journal) has the right to transfer the rights, acquired parties without explicit consent of the Author.
The Author consents that the Article be published under the Creative Commons BY-NC 4.0 (attribution-non-commercial) or comparable licence.
