The disclosed biometric authentication system acquires registered biometric information in a position, orientation and form suitable for authentication without placing a large burden on the user. To this end, the biometric authentication system is provided with a biometric image acquisition unit, an evaluation unit, an evaluation value extraction unit, and a registered biometric information storage unit. The evaluation unit evaluates each of the multiple biometric images acquired by the biometric image acquisition unit for each of multiple evaluation criteria and outputs, as the evaluation result for each of said evaluation criterion, the evaluation values indicating the degree to which the biometric images match the evaluation criterion. From the evaluation values of the biometric images outputted by the evaluation unit, the evaluation value extraction unit extracts for each evaluation condition the evaluation values that indicate a degree of matching greater than or equal to a prescribed evaluation threshold value. Furthermore, if multiple evaluation values are extracted for the same evaluation criterion, the evaluation value with the highest degree of matching for that evaluation criterion is selected. The registered biometric information storage unit stores, as registered biometric information of the authenticated subject, biometric images corresponding to the evaluation values extracted by the evaluation value extraction unit.L'invention porte sur un système d'authentification biométrique qui acquiert des informations biométriques enregistrées dans une position, une orientation et une forme appropriées pour une authentification sans incommoder fortement l'utilisateur. À cette fin, le système d'authentification biométrique comprend une unité d'acquisition d'image biométrique, une unité d'évaluation, une unité d'extraction de valeur d'évaluation et une unité de stockage d'informations biométriques enregistrées. L'unité d'évaluation évalue chacune des multiples im
