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Revista EIA

Print version ISSN 1794-1237

Abstract

SANCHEZ TORRES, Germán; ESPINOSA BEDOYA, Albeiro  and  FERNANDO CEBALLOS, Yony. OPTIC DISC DETECTION IN RETINAL IMAGES USING AN EVOLUTION STRATEGY (µ+λ). Rev.EIA.Esc.Ing.Antioq [online]. 2014, n.21, pp.55-66. ISSN 1794-1237.

In this paper we show an optic disk (OD) detection approach based on evolution strategy (ES). The approach has two main steps: Coarse detection and contour edges refinement. Coarse detection estimates an approximated position using a ES in which each individual has a fitness function based on the bright pixels amount and the vasculature structure edge pixels quantity inside a circle. The contour edge refinement uses a geometrical approach to circle deformation in order to adjust the edge circle with OD edges. For this, the pixel with the largest intensity value variation along a normal line is considered. The proposed approach was evaluated using the STARED and DIAREDB public repository, processing normal and disease patient states retinal images. The results show that the proposed method identifies the optic disk position with an accuracy of 96 %.

Keywords : Evolution Strategies; Optic Disk; Retinal Images; Retinopathy.

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