Title :
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
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;
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
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.804304
