Extraction of the optic disk boundary in digital fundus images

Author

Mendels, F. ; Heneghan, C. ; Harper, P.D. ; Reilly, R.B. ; Thiran, J.-Ph.

Author_Institution

Signal Process. Lab., Swiss Fed. Inst. of Technol., Lausanne, Switzerland

Volume

2

fYear

1999

fDate

36434

Abstract

The methods of active contours (“snakes”) and level sets were applied to images of the retina in order to locate the outer boundary of the optic disk. A gradient-vector-flow based active contour was used as it performed well over a large range of initial conditions. Images were pre-processed to lessen the influence of blood vessels on boundary detection. Both active contours and level set methods accurately located the correct boundary; level set methods were computationally more intensive

Keywords

blood vessels; edge detection; eye; medical image processing; optical images; vectors; active contours method; blood vessels´ influence lessening; computationally intensive methods; digital fundus images; gradient-vector-flow based active contour; level set methods; level sets; medical diagnostic imaging; optic disk boundary extraction; outer boundary location; preprocessed images; Active contours; Biomedical imaging; Blood vessels; Equations; Image converters; Level set; Optical propagation; Optical sensors; Retina; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint

Conference_Location

Atlanta, GA

ISSN

1094-687X

Print_ISBN

0-7803-5674-8

Type

conf

DOI

10.1109/IEMBS.1999.804304

Filename

804304