నైరూప్య

Identification of Cup-Disk Ratio for Glaucoma Prone Eyes

Niladri Halder, Dibyendu Roy, Arnab Chattaraj, Tanumoy Chowdhury

In the framework of completely computer assisted diagnosis of glaucoma, an advanced algorithm that identifies the optic cup and optic disk, determines the radius by segmenting out the optic cup and disk and calculates the ratio of the optic cup to disk radius in fundus images of the macula is presented and discussed in this paper. The parameters of thecup to disk ratio in the optic disk region of retina are hallmark of glaucoma detection and allow itsdetection with a high sensitivity. Since detection of the ratio of optic cup to disk radius is asignificant diagnostic task, a major role is being handled by the computer assistance. The optic disk has been found by using red color space image as the optic disk is brighter considering to the other macula region and the contours are identified by means of morphological reconstruction techniques. The detection of optic cup has been done by using the green color space image. The optic disc and the optic cup have been detected by means of thresholding and morphological reconstruction technique.