Automated localisation of optic disc in retinal colour fundus image for assisting in the diagnosis of glaucoma

Latifah Listyalina,Widhia Kz Oktoeberza,Hanung Adi Nugroho,Sunu Wibirama

doi:10.21924/cst.2.1.2017.43

Latifah Listyalina, Widhia Kz Oktoeberza + Show 2 more

Open Access

https://doi.org/10.21924/cst.2.1.2017.43

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Abstract

Optic disc (OD), especially its diameter together with optic cup diameter can be used as a feature to diagnose glaucoma. This study contains two main steps for optic disc localisation, i.e. OD centre point detection and OD diameter determination. Centre point of OD is obtained by finding brightness pixel value based on average filtering. After that, OD diameter is measured from the detected optic disc boundary. The proposed scheme is validated on 30 healthy and glaucoma retinal fundus images from HRF database. The results are compared to the ground truth images. The proposed scheme obtains evaluation result (E) for healthy and glaucoma images is 0.23 and 0.21, respectively. These results indicate successful implementation of automated OD localisation by detecting OD centre point and determining OD diameter.

Highlights

There are some retinal related diseases and common causes of early visual loss and blindness such as diabetic retinopathy, age-related macular degeneration (ARMD) and glaucoma
The description of the used of optic disc centre point candidate is focused on its application as a feature of glaucoma diseases
A developed algorithm for optic disc localisation on healthy and unhealthy colour fundus images to facilitate the diagnosis of glaucoma has been described

Summary

Introduction

There are some retinal related diseases and common causes of early visual loss and blindness such as diabetic retinopathy, age-related macular degeneration (ARMD) and glaucoma. Glaucoma is the second leading cause of blindness after refractive and cataract errors [1]. This disease is a neurodegenerative eye condition that is irreversible. Probability and specific criteria of glaucoma progression can be diagnosed by measuring cup to disc ratio (CDR), since the enlargement in the cupping of optic nerve head (ONH) corresponds to the increased ganglion cell death. High risk or severe stage of glaucoma is determined by the ratio value of optic cup to optic disc is greater than 0.65 [5, 6]

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