PROBLEM TO BE SOLVED: To provide a method for evaluating a skin state objectively with a high degree of precision.SOLUTION: A method for evaluating a skin state includes a first process for acquiring a histogram of the strength of a color element of each pixel in an evaluation object area from an image of a photograph of a skin surface, and a second process for calculating (1) a value of (a)/(b) which is obtained by dividing a maximum value (a) of the frequency of the histogram by a difference (b) between a maximum value and a minimum value of the strength of the color element, or (2) a value of a sum (Σ(f(x)*x)) of products of the frequency of the histogram (f(x)) and the strength of the color element (x).COPYRIGHT: (C)2014,JPO&INPIT【課題】肌の状態を、客観的、かつ精度良く評価できる方法を提供する。【解決手段】肌表面の撮影画像から評価対象領域の各画素の色要素の強さのヒストグラムを得る第1工程と、(1)ヒストグラムの頻度の最大値(a)を、色要素の強さの最大値と最小値との差(b)で除した値(a)/(b)値を求めるか、又は(2)ヒストグラムの頻度(f(x))と色要素の強さ(x)との積の和(Σ(f(x) * x))の値を求める第2工程を含む、肌の状態の評価方法。【選択図】図3
