Optic disc localization in fundus images

Fundus images are suitable for automatic evaluation in the current clinical practice. The detection and localization of important areas such as the vascular bed, yellow spot (fovea) and optical disc are necessary for following pathological changes detection. After image preprocessing we use very rapid method based on gradients called Fast radial symmetry transform — FRST to find approximately circular (elliptical) shape of optic disc. We compare the results achieved by this method with results of two other detecting methods for circular to elliptical objects, Hough transform and Histogram method using template.