Biometric information registration apparatus and biometric information registration method

1. A biometric information registration apparatus, comprising:

a biometric information sensor configured to acquire a fingerprint image from a plurality of fingers in association with one ID;

a processor configured to generate feature data used for verification from the fingerprint image, to generate characteristic data used for calculation of a similarity between the plurality of fingers from the fingerprint image, to calculate the similarity between the plurality of fingers by comparing the characteristic data, and to determine whether the feature data is registrable based on the similarity, the characteristic data indicating a size of a fingerprint of the fingerprint image, a likelihood of the fingerprint image being a type of fingerprint pattern, a quality of the fingerprint image, a width of a ridge of the fingerprint image, or a distance between ridges of the fingerprint image or any combination thereof; and

a memory configured to store the feature data in association with the ID when the feature data is registrable.

2. The biometric information registration apparatus according to claim 1 , wherein

the memory further stores the characteristic data in association with the feature data;

the biometric information sensor acquires additional biometric information from a finger that is identical with or different from the plurality of fingers after the memory stores the feature data and the characteristic data;

the processor generates feature data from the additional biometric information, generates characteristic data from the additional biometric information, calculates similarity by comparing the characteristic data stored in the memory with the characteristic data generated from the additional biometric information, determines whether the feature data generated from the additional biometric information is registrable based on the similarity between the characteristic data stored in the memory and the characteristic data generated from the additional biometric information, and registers the feature data generated from the additional biometric information in the memory in association with the ID when the feature data generated from the additional biometric information is registrable.

3. The biometric information registration apparatus according to claim 2 , wherein

the memory further stores a generation date in association with the characteristic data, the generation date being a date on which the characteristic data used for calculation of the similarity between the plurality of fingers is generated, and

the processor changes a calculation method of calculating the similarity based on the generation date stored in the memory and a generation date of the characteristic data generated from the additional biometric information.

4. The biometric information registration apparatus according to claim 1 , wherein

the processor determines that the feature data is registrable when the similarity is greater than a threshold.

5. A biometric information registration method, comprising:

acquiring a same type of biometric information from a plurality of fingers in association with one ID;

generating by a processor feature data used for verification from the biometric information;

generating by the processor characteristic data used for calculating a similarity between the plurality of fingers from the biometric information, the characteristic data indicating a size of a fingerprint of the fingerprint image, a likelihood of the fingerprint image being a type of fingerprint pattern, a quality of the fingerprint image, a width of a ridge of the fingerprint image, or a distance between ridges of the fingerprint image or any combination thereof;

calculating by the processor the similarity between the plurality of fingers by comparing the characteristic data; and

determining by the processor whether the feature data is registrable based on the similarity and registering the feature data in a memory in association with the ID when the feature data is registrable.

6. The biometric information registration method according to claim 5 , wherein

the registering the feature data in the memory further registers the characteristic data in the memory in association with the feature data,

the biometric information registration method further comprises:

acquiring additional biometric information from a finger that is identical with or different from the plurality of fingers after the memory stores the feature data and the characteristic data;

generating by the processor feature data from the additional biometric information;

generating by the processor characteristic data from the additional biometric information;

calculating by the processor similarity by comparing the characteristic data stored in the memory and the characteristic data generated from the additional biometric information; and

determining by the processor whether the feature data generated from the additional biometric information is registrable based on the similarity between the characteristic data stored in the memory and the characteristic data generated from the additional biometric information, and registering the feature data generated from the additional biometric information in the memory in association with the ID when the feature data generated from the additional biometric information is registrable.

7. The biometric information registration method according to claim 6 , wherein

the registering the feature data in the memory further registers a generation date in association with the characteristic data, the generation date being a date on which the characteristic data used for calculation of the similarity between the plurality of fingers is generated, and

the processor changes a calculation method of calculating the similarity based on the generation date stored in the memory and a generation date of the characteristic data generated from the additional biometric information.

8. The biometric information registration method according to claim 5 , wherein

the determining whether the feature data is registrable determines that the feature data is registrable when the similarity is greater than a threshold.

9. A non-transitory computer-readable recording medium having stored therein a biometric information registration program causing a computer to execute a process comprising:

acquiring a same type of biometric information from a plurality of fingers in association with one ID;

generating feature data used for verification from the biometric information;

generating characteristic data used for calculating a similarity between the plurality of fingers from the biometric information, the characteristic data indicating a size of a fingerprint of the fingerprint image, a likelihood of the fingerprint image being a type of fingerprint pattern, a quality of the fingerprint image, a width of a ridge of the fingerprint image, or a distance between ridges of the fingerprint image or any combination thereof;

calculating the similarity between the plurality of fingers by comparing the characteristic data; and

determining whether the feature data is registrable based on the similarity and registering the feature data in a memory in association with the ID when the feature data is registrable.