Localization of the Optic Disc Using Red and Green Channels of the Retinal Images

Abstract

Optic disc is the bright yellowish region in a retinal image which always appears approximately circular. Automated analysis of retinal images is necessary for the detection of retinal diseases such as diabetes retinopathy, glaucoma and hypertension. In the automated analysis, localization of optic disc plays an important role because optic disc could be wrongly identified as signs of diseases. In our research work we have introduced a further developed method to localize optic disc more accurately. We have not limited our research to one channel of the retinal image but we have compared the results obtained by taking red and green channels of the retinal images separately for the optic disc localization. Finally our research introduced a novel method for the optic disc localization by using both red and green channels without limiting the research to one channel only. The proposed technique has a overall accuracy of 92.52% which is considerably high compared with analysis done using red and green channels of retinal image separately.