Conference Papers

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Author: search.filters.author.Almazroa, A.Subject: search.filters.subject.Image Segmentation

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    Optic disc segmentation using circular hough transform and curve fitting
    (Institute of Electrical and Electronics Engineers Inc., 2015) Gopalakrishnan, A.; Almazroa, A.; Raahemifar, K.; Lakshminarayanan, V.
    We present a technique to segment the optic disc (OD) boundary from a color retinal fundus image. The technique used involves the extraction and removal of blood vessels using a top hat transform and an inpainting process. Then, a circular Hough transform is applied to the detected edges to obtain a coarse boundary of the OD and following which probable points of the optic disc are fed to a curve fitting algorithm which uses a higher order polynomial to draw the final boundary of the optic disc. The optic disc segmentation is a crucial part in estimating the CDR (Cup-to-disc ratio) which can be used as an early indicator of glaucoma and for following the progression/remission of the disease. © 2015 IEEE.