Biometrics information registration method, biometrics authentication method, biometrics information registration device and biometrics authentication device

A biometrics authentication method for causing a computer to execute a process comprising:

• extracting vein data representing a vein image and a feature amount from an image obtained by an image obtainment unit;
• narrowing down a plurality of pieces of registered vein data stored in the storage unit on the basis of a comparison result between the extracted feature amount and a registered feature amount stored in the storage unit, and obtaining a degree of similarity between the pieces of registered vein data that were narrowed down and the extracted vein data;
• and
• determining whether or not a subject is a person to be authenticated, on the basis of the obtained degree of similarity, wherein
• the feature amount includes a first feature amount representing a relationship between two of a plurality of segments obtained by vectorizing the vein image.

A biometrics information registration device comprising:

• a feature amount extraction unit to extract vein data representing a vein image and a feature amount from an image obtained by an image obtainment unit;
• and
• a feature amount registration unit to make a storage unit store the vein data and the feature amount extracted by the feature amount extraction unit, wherein
• the feature amount includes a first feature amount representing a relationship between two of a plurality of segments obtained by vectorizing the vein image.

A biometrics authentication device comprising:

• a feature amount extraction unit to extract vein data representing a vein image and a feature amount from an image obtained by an image obtainment unit;
• a matching unit to narrow down a plurality of pieces of registered vein data stored in the storage unit on the basis of a comparison result between the feature amount extracted by the feature amount extraction unit and a registered feature amount stored in the storage unit, and obtaining a degree of similarity between the pieces of registered vein data that were narrowed down and the vein data extracted by the feature amount extraction unit;
• and
• a determination unit to determine whether or not a subject is a person to be authenticated, on the basis of the degree of similarity obtained by the matching unit, wherein
• the feature amount includes a first feature amount representing a relationship between two of a plurality of segments obtained by vectorizing the vein image.

A non-transitory computer-readable recording medium which records a program for causing a computer to execute a process comprising:

• extracting vein data representing a vein image and a feature amount from an image obtained by an image obtainment unit;
• and
• making a storage unit store the extracted vein data and feature amount, wherein
• the feature amount includes a first feature amount representing a relationship between two of a plurality of segments obtained by vectorizing the vein image.

A non-transitory computer-readable recording medium which records a program for causing a computer to execute a process comprising:

• extracting vein data representing a vein image and a feature amount from an image obtained by an image obtainment unit;
• narrowing down a plurality of pieces of registered vein data stored in the storage unit on the basis of a comparison result between the extracted feature amount and a registered feature amount stored in the storage unit, and obtaining a degree of similarity between the pieces of registered vein data that were narrowed down and the vein data extracted by the feature amount extraction unit;
• and
• determining whether or not a subject is a person to be authenticated, on the basis of the obtained degree of similarity, wherein
• the feature amount includes a first feature amount representing a relationship between two of a plurality of segments obtained by vectorizing the vein image.