| 摘要 |
In a biometrics authentication apparatus, a storage unit stores a dictionary containing biometrics information of a registered person. An information acquisition unit acquires biometrics information of a subject person. An authentication unit authenticates validity of the subject person based on an index representing a degree of similarity between the biometrics information of the dictionary stored in the storage unit and the acquired biometrics information. A dictionary management unit updates the dictionary based on the acquired biometrics information in a first case where the index represents a degree of the similarity higher than a first threshold value, and otherwise creates a new dictionary based on the acquired biometrics information and stores the created new dictionary in the storage unit, in a second case where the index represents a degree of the similarity lower than the first threshold value and higher than a second threshold value which is set lower than the first threshold value. |
