Patent ID: 8351664

Claim:
A biometric authentication device configured to detect feature information of a biologic object in order to authenticate the biologic object, comprising: a detection unit configured to detect an image having the feature information from a part of the biologic object; an accommodation unit configured to accommodate such that the part of the biologic object is adapted to the detection unit; an extraction unit configured to extract the feature information from the image; and a determination unit configured to determine whether the extraction unit extracts the feature information necessary for an authentication; wherein the accommodation unit is configured to accommodate a card-type recording medium configured to provide alternative information alternative to the feature information, such that the card-type recording medium is faced to the detection unit, with the part of biologic object absent; and wherein when the determination unit determines that the extraction unit does not extract the feature information necessary for the authentication, the detection unit is configured to detect the alternative information from the card-type recording medium.