PROBLEM TO BE SOLVED: To increase the measuring accuracy in a shorter time when measuring the diameter of a fundus blood vessel at a plurality of positions of the vessel at the same time from a fundus image.SOLUTION: A fundus image analysis apparatus comprises: blood vessel region extraction means for extracting a blood vessel region from a fundus image blood vessel running line extraction means for extracting blood vessel running lines representing a running state of blood vessels on the basis of the blood vessel region extracted by the blood vessel region extraction means first shortest distance calculation means for calculating the shortest distance in a first direction from a point on a blood vessel running line to a non-blood vessel region, or a region other than the blood vessel region second shortest distance calculation means for calculating the shortest distance in a second direction different from the first direction from the point on the blood vessel running line to the non-blood vessel region and shortest-distances-in-two-directions summing means for calculating the information about blood vessel diameters by summing up the first shortest distance in the first direction calculated by the first shortest distance calculation means and the second shortest distance in the second direction calculated by the second shortest distance calculation means.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】眼底画像から眼底血管の複数箇所の径を同時に計測する際に、短い時間でかつより正確に径を算出する。【解決手段】眼底画像から血管領域を抽出する血管領域抽出手段と、血管領域抽出手段で抽出した血管領域に基づいて血管の走行状態を表す血管走行線を抽出する血管走行線抽出手段と、血管走行線上の点から血管領域以外の領域である非血管領域までの第一の方向の最短距離を算出する第一の最短距離算出手段と、血管走行線上の点から前記非血管領域までの前記第一の方向とは異なる第二の方向の最短距離を算出する第二の最短距離算出手段と、第一の最短距離算出手段で算出した第一の方向の最短距離と第二の最短距離算出手段で算出した第二の方向の最短距離とを加算して血管径に関する情報を算出する二方向最短距離加算手段と、を有する眼底画像解析装置とする。【選択図】図1
