Detecting Blood Vessel Measurement Points on a Fundus Image using the Last Diagnosed Image

Abstract

The artery-vein diameter ratio on ocular fundus images is checked during medical check-ups, because it is an index for high blood pressure. Detection of the measurement points is one of the problems in automating this task. We propose a method of detecting the measurement points. In this method, the region most similar to that around the measurement points on the diagnosed fundus image for the same patient is searched. The search region is limited by rough registration using the optic disk, which can be automatically detected. The method was tested using 114 sample measurement points pointed out by medical doctors, and all were correctly detected.