Automatic Segmentation of Optic Disk in Retinal Images using DWT

In this paper a new method is proposed for automatic segmentation of the Optic Disk (OD) in retinal images. The proposed OD segmentation method is based on Discrete Wavelet Transform (DWT) and morphological operations. This method is evaluated on publicly available standard databases DIARETDB0 and DIARETDB1. The proposed method attained accuracy rate 89.88 % on DIARETDB0 and 91.53% on DIARETDB1 database for localization of the OD. The proposed method achieved OD segmentation average sensitivity and specificity 71.54%, 99.53% and 71.11%, 99.56% on DIARETDB0 and DIARETDB1 databases respectively. Experimental results show the better performance with low computation time over existing OD segmentation methods.