PROBLEM TO BE SOLVED: To acquire an excellent blood vessel diameter measurement result even in a blood vessel whose blood column reflection is strong.SOLUTION: An eyeground image analysis device includes: pixel value acquisition means for acquiring a pixel value of each pixel in an eyeground image of an eye to be examined gradient intensity calculation means for calculating gradient intensity from the acquired pixel value means for generating an image for blood vessel extraction for generating an image for blood vessel extraction for extracting a blood vessel in the eyeground image based on the pixel value acquired by the pixel value acquisition means and the gradient intensity calculated by the gradient intensity calculation means.COPYRIGHT: (C)2016,JPO&INPIT【課題】血柱反射が強い血管においても良好な血管径計測結果を得る。【解決手段】眼底画像の解析装置に対して、被検眼の眼底画像における各画素の画素値を取得する画素値取得手段と、取得した画素値から勾配強度を算出する勾配強度算出手段と、画素値取得手段により取得した画素値と勾配強度算出手段により算出した勾配強度とに基づいて眼底画像における血管を抽出するための血管抽出用画像を生成する血管抽出用画像生成手段と、を配する。【選択図】図1
