Abstract An automatic optic disc localization in retinal images used to screen eye related diseases like diabetic retinopathy. Many techniques are available to detect Optic Disc (OD) in high-resolution retinal images. Unfortunately, there are no efficient methods available to detect OD in low-resolution retinal images. The objective of this research paper is to develop an automated method for localization of Optic Disc in low resolution retinal images. This paper proposes a modified directional matched filter parameters of the retinal blood vessels to localize the center of optic disc. The proposed method was implemented in MATLAB and evaluated both normal and abnormal low resolution retinal images using the subset of Optic Nerve Head Segmentation Dataset (ONHSD) and the success percentage was found to be an average of 96.96% with 23seconds.

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[25] Wu D., Zhang M., Liu J., and Bauman W., “On the Adaptive Detection of Blood Vessels in Retinal Images,” IEEE Transactions on Biomedical Engineering, vol. 53, no. 2, pp. 341- 343, 2006. An Automatic Localization of Optic Disc in Low Resolution Retinal Images ... 7 Murugan Raman has completed his M.E. degree in Embedded System Technologies from Anna University, Coimbatore, India and his B.E.Degree in Anna University Chennai, India. Currently he is pursuing his Ph.D in Anna University, Chennai for the field of Retinal Image analysis. He has 10 years experience in teaching. He is working as Assistant Professor in AMS College of Engineering, Avadi-IAF, Chennai. He published 6 International Journals and presented 5 national conferences & 6 international conference. His research interest includes medical Imaging and Signal Processing. Reeba Korah teaches subjects in Electronics and Communication Engineering and pursues scholarly research in low power VLSI and wireless sensor networks. An alumna of Marathwada University, Aurangabad, Maharastra and Anna University, Chennai, Professor Korah holds a doctoral degree in VLSI and Video Processing from Anna University, Chennai. An accomplished scholar, Professor Korah has published extensively in international, peer reviewed journals, and supervised doctoral scholars. Kavitha Tamilselvan completed her Ph.D in Anna University Chennai, India. She received her M.E. degree in Systems Engineering and Operations Research from Anna University, Chennai. B.E. in Electronics and Communication Engineering from Bharathidasan University, India. Presently she is working as professor in New Prince Shri Bhavani College of Engineering and Technology. Her fields of interests are Wireless Networks, Wireless Sensor Network and information security, etc. She has published 20 papers in national/International conferences and 10 in International Journals.