Optic Disk Localization for Gray-Scale Retinal Images Based on Patch Filtering
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In this paper, an optic disk (OD) localization method is proposed for the retinal images based on a novel patch filtering approach. The patch filtering has been performed sequentially based on clustering in two stages. In the first stage, the patches are selected exploiting an ’isotropic’ measure based on the ratio of maximum and minimum eigenvalues of the moment matrix representing the structure tensor. In the second stage, the patch filtering is based on the saliency measure. Finally, the optic disk is located from the centroids of the selected patches. Promising results are obtained for the low-contrast pathological retinal images using STARE database providing high localization accuracy.
KeywordsOptic disk localization Patch filtering Retinal image
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- 8.Osareh, A.: Automated identification of diabetic retinal exudates and the optic disc, Dissertation, University of Bristol (2004)Google Scholar
- 12.Taylor, H.R., Keeffe, J.E.: World blindness: A 21st century perspective. British Journal of Ophthalmology 85, 261–266Google Scholar
- 13.Sekhar, S., Nuaimy, W.A., Nandi, A.K.: Automated localisation of retinal optic disk using Hough transform. In: IEEE Int. Conf. Medical Imaging (2008)Google Scholar
- 16.The STARE project, http://www.ces.clemson.edu/~ahoover/stare