A Simple and Fast Algorithm for the Automatic Localization of Optic Disc in Digital Fundus Retinal Images

摘要

Locating the Optic Disc (OD) is of critical importance in a retinal analysis system. This paper presents a fast algorithm for the automatic localization of OD in digital fundus retinal images. OD localization follows the Blood Vessel Detection (BVD). A morphology based approach is proposed for BVD. OD is localized by exploiting the property that it is a bright region and the density of blood vessels is high in this region. The algorithm has been tested on 100 normal and 480 diseased retinal images achieving success rates 100% and 93.75% with average execution times of 9 seconds and 17 seconds respectively, thereby demonstrating the speed, robustness and accuracy of the proposed method.