A review on Optic Disc and Cup Segmentation
K. Manju1, R.S.Sabeenian1 and A.Surendar21Department of Electronics and Communication Engineering Sona college of technology Salem, Tamil Nadu.
2Department of Electronics and Communication Engineering, Vignan’s University, Guntur.
Corresponding Author E-mail: Manju.kandaswamy@gmail.com
Abstract: Human eye is considered to be the most beautiful creation of god which is affected by 3 deadliest diseases. These diseases cause irreversible vision loss. They are listed as Cataract, Diabetic retinopathy and Glaucoma. Cataract is age related eye disease. Diabetic retinopathy is caused due to increase of sugar in blood level. DR is found only in people who have sugar. Glaucoma is caused by increase in the intraocular pressure. This pressure is to maintained in the range 12-22mmHg. This pressure is increased if the fluid inside the eye gets clotted inside the eye. This clot causes an acute or wide angle between the iris and cornea. This determine the type of glaucoma. There are three methods used to identify glaucoma by ophthalmologist. They are cup to disc ratio, ISTN value and intraocular pressure. In this paper we analyze different techniques used to calculate CDR value and ISTH value. We have found that adaptive threshold segmenting after histogram and smoothing operation provide us better results. They are fast in calculation and would help in early detection of glaucoma by the ophthalmologist.
Keywords: CDR; ISTN value; Glaucoma; Intraocular pressure Back to TOC