Diagnosis of Diabetic Retinopathy through Slit Lamp Images

Abstract

A new system is developed for the diagnosis of diabetic retinopathy. It is developed with the help of slit lamp biomicroscopic retinal images. The results are compared with digital fundus image using image processing techniques. The slit lamp, offering users both space savings and cost advantages. By using slit lamp biomicroscopic equipment with an ordinary camera, users can reduce the cost more than 30 times compared to digital fundus camera. The fundus examination was performed on human volunteers with a hand held contact or non-contact lens (90D).The lens providing an extremely wide field of view and better image resolution. The slit lamp equipment is used to examine, treat (with a laser), and photograph (with a camera) of the retina. A digital camera is permitted to capture the image and store this image by using slit lamp, each photograph have small potion of the entire retinal image. The individual slit lamp biomicroscopic fundus images are aligned and blended with block matching algorithm to develop an entire retinal image same as the fundus camera image and detect optic disk, blood vessel ratio from the images. This image can be used for the diagnosis of diabetic retinopathy.