Abstract：The accurate detection of optic disc is important for the accurate detection of other features of retinal fundus images such as blood vessels and microaneurysm. This paper presents an optic disc detection method which combines brightness and circularity characteristics of optic disc. Based on the detection method, the fundus images would be preprocessed firstly. Then the mathematical morphology operation is introduced to remove the interference of blood vessels, and threshold segmentation is used to identify the potential optic disc regions. Then the authentic optic disc regions would be detected according to the area and circularity characteristics of optic disc. Experimental results shows that the algorithm owns high localization accuracy and fast localization speed.
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