| 摘要 |
A biometric authentication apparatus includes a storage unit which stores first shape data representing a shape of biometric information of a registered user's hand with fingers at a first posture, a first index representing the first posture, second shape data representing a shape of biometric information of the hand with the fingers at a second posture, and a second index representing the second posture; a posture specification unit which calculates a third index representing a third posture of fingers of a user's hand captured in biometric image; a biometric information extraction unit which generates third shape data representing a shape of biometric information of the user's hand captured in the biometric image; a correction unit which obtains corrected shape data by correcting the first or the second shape data to cancel a shape difference of the biometric information due to a difference between the third posture and the first or the second posture according to a ratio of a difference between the third index and the first or the second index to a difference between the first and the second indexes; and a matching unit which matches the third shape data and the corrected shape data. |
