Detection of Lesions and Feature Extraction for Diabetic Retinopathy

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue IV, April 2018 | ISSN 2321–2705

Detection of Lesions and Feature Extraction for Diabetic Retinopathy

   Anjali.A.Kunghatkar¹, M.S.Panse²

 Student¹, M.Tech Electronics and Telecommunication, Professor²
Department of Electrical Engineering, Veermata Jijabai Technological Institute, Mumbai, Maharashtra, India

Abstract – Detection of Diabetic Retinopathy (DR) in early stage is essential to avoid complete blindness. The retinal fundus images of the patients are procured by capturing the fundus of the eye with a digital fundus camera. Fundus Images should be pre-processed to remove the noise, preserve the edges of an image, and enhance the image quality for carrying out further image analysis. This paper provides various pre-processing techniques for detection of DR. The abnormalities in retinal fundus images due to DR are Lesions which includes Microaneurysms, Hemorrhages, exudates and blood vessels. In this study canny’s edge detector is used for detection of Lesions and features are extracted.

Keywords- Fundus, Lesions, Canny’s edge detector, Median filter.

I. INTRODUCTION

Diabetic retinopathy is damage to the retina, specifically blood vessels in the retina, caused by complications of diabetes mellitus. Diabetic retinopathy can eventually lead to blindness if left untreated. The retina is light sensitive membrane that covers the back of the eye. If diagnosed and treated early blindness is usually preventable. In diabetic patients due to increase of glucose level in blood there will be rupturing of the small blood vessels called capillaries in the eye. Due to this the blood leaks into the retina of the eye. The abnormal features related to DR which can be found can be microaneurysms, hemorrhages, hard exudates, cotton wool spots etc. The presence of any of the abnormal features helps in classifying the stage of the disease. The first stage of retinopathy is known as Non-Proliferative Retinopathy (NPDR). In NPDR stage, various features like micro-aneurysms, haemorrhages, soft exudates cotton wool spots are present. Depending upon number of these features the classification is performed. Accordingly, Non-proliferative stage can be categorized as Mild, Moderate, and Severe. In PDR stage, new abnormal blood vessels are formed at very high rate. This may result in severe vision loss [1]

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