IJMTES – SEGMENTATION OF OPTIC DISC AND VESSEL BASED OPTIC CUP FOR GLAUCOMA ASSESSMENT

Journal Title : International Journal of Modern Trends in Engineering and Science

Author’s Name : K.Muthusamy,  J.Preethi

Volume 01 Issue o5  Year 2014  

ISSN no:  2348-3121

Page no: 230-235

AbstractGlaucoma is a chronic eye disease that leads to vision loss. In this disease, the optic nerve is progressively damaged. Detection of this Glaucoma is very difficult task and Current tests using intraocular pressure (IOP) are not sensitive enough for population based glaucoma screening. The optic nerve head is also called the optic disc and central bright zone called the optic cup, Optic nerve head assessment in retinal images is more difficult. This paper proposes classification of optic disc based on super pixel and optic cup using vessel bends tracking for glaucoma screening, In optic disc segmentation, histograms is applied to R,G,B,H and S color space, and center surround statistic is calculated  to classify each superpixel as disc or background. A self assessment reliability test is performed to evaluate the quality of the automated optic disc segmentation. In optic cup vessel bends tracking is also included to fine tune the optic cup boundary. Vessel bends are identified using the method of dynamic Region of Support (ROS), optic cup is segmented and also location information is added. Finally segmented optic disc and cup is used to calculate Vertical Cup to Disc Ratio (CDR).  CDR is one of the glaucoma factors and CDR is well accepted and commonly used. If CDR value is high then risk of glaucoma. This method can be useful for automatic segmentation and glaucoma screening.

KeywordsGlaucoma screening, optic disc segmentation, optic cup segmentation, vessel bends, Region Of Support.

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