A filter 41 for extracting directional features corresponding to directions different from each other from the input image and a filter 41 for extracting directional features corresponding to directions different from each other from the input image and an overall luminance value of the directional feature corresponding to the predetermined direction among the plurality of directional features extracted from the filter 41 An orthogonal filter 42 for increasing the overall luminance value of the directional feature corresponding to the direction orthogonal to the directional feature corresponding to the predetermined direction and outputting the other directional characteristics as it is, Directional feature generation processing units 43 to 45 for generating omni-directional features according to the directional feature of the non-directional feature stored in the storage unit, a collating processing unit for obtaining similarity between the non-directional feature and the registered omnidirectional feature stored in the storage unit And a determination unit for determining whether or not the user is the principal using the similarity, thereby configuring the biometric authentication device.入力される画像からそれぞれ互いに異なる方向に対応する指向的特徴を抽出するフィルタ41と、フィルタ41から抽出される複数の指向的特徴のうち、所定方向に対応する指向的特徴の全体の輝度値を下げ、所定方向に対応する指向的特徴に直交する方向に対応する指向的特徴の全体の輝度値を上げ、その他の指向的特徴をそのまま出力する直交フィルタ42と、直交フィルタ42から出力される複数の指向的特徴により無指向的特徴を生成する無指向的特徴生成処理部43~45と、無指向的特徴と記憶部に記憶されている登録無指向的特徴との類似度を求める照合処理部と、類似度を用いて、本人であるか否かの判定を行う判定部とを備えて生体認証装置を構成する。
