PROBLEM TO BE SOLVED: To provide a fundus image processing device capable of objectively measuring a blood flow width ratio while eliminating the problem of variations due to a measuring persons subjective view and a measurement place.SOLUTION: A fundus image processing device includes: display means 20 for displaying a fundus image and a graphic for measurement whose outer shape is quadrangular measurement range setting means 40 for setting a measurement range on the basis of the graphic for measurement arranged superimposed on the fundus image on the basis of an external instruction and blood flow region end point specification means 50 for setting a sample to each side at a predetermined interval for two opposed sides of the graphic for measurement, calculating coordinates corresponding to each sample to create a one-dimensional coordinate arrangement, acquiring a corresponding brightness value from the fundus image for each sample in the coordinate arrangement to create a brightness arrangement, creating a differential arrangement, which is an arrangement of a differential brightness value, using a difference value with the brightness value of the adjacent samples using the brightness arrangement, searching for a maximum sample that takes a maximum value and a minimum sample that takes a minimum value for the differential arrangement, and specifying a blood flow region end point on the basis of the maximum sample and the minimum sample.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】 計測者の主観や計測箇所によるバラツキの問題を解消しながら、血流幅比率を客観的に計測することが可能な眼底画像処理装置を提供する。【解決手段】 眼底画像と、外形が四角形である計測用図形を表示する表示手段20、外部指示に基づき、眼底画像に重ねて配置された計測用図形に基づき計測範囲を設定する計測範囲設定手段40、計測用図形の対向する2辺について、各辺に所定の間隔でサンプルを設定し、各サンプルに対応する座標を算出して1次元の座標配列を作成し、座標配列の各サンプルについて、眼底画像より対応する輝度値を取得して輝度配列を作成し、輝度配列を用いて隣接するサンプルの輝度値との差分値を用いて微分輝度値の配列である微分配列を作成し、微分配列に対して最大値をとる最大サンプルと最小値をとる最小サンプルを探索し、最大サンプルと最小サンプルを基に血流領域端点を特定する血流領域端点特定手段50、を有する。【選択図】 図2
