Automatic Localization of the Optic Disc Center in Retinal Images based on Angle Detection in Curvature Scale Space

1. Introduction

Retinal imaging is increasingly used in large scale, to studies for detection of glaucoma, diabetic retinopathy age-related macular degeneration and cardiovascular disease.When an ophthalmologist uses an ophthalmoscope to look into the eye, he sees the viewof the retina represented in (Figure 1). Retina is the innermost layer of the eye and composed of many important anatomical features. The main structures of a fundus retinal image were defined as the OD, fovea, and blood vessels. The optic nerve is one of the most important organs in the human retina. The localization of the ODis the first step of most identification, segmentation, diagnosing some diseases on retinal images such as diabetic retinopathy (A. Dehghani, 2012) and retinal recognition (M Ortega1, 2009). Detection of the optic nerve is a key preprocessing component for the automatic extraction of the anatomical structures of the retina (X. Zhu, 2010).

Figure 1.

Retina as seen through an opthalmoscope