LIVING BODY INFORMATION REGISTRATION METHOD, BIOMETRICS AUTHENTICATION METHOD, AND BIOMETRICS AUTHENTICATION APPARATUS
First Claim
1. A living body information registration method executed by a computer, the method comprising:
- extracting vein data and characteristic amounts from a captured image which is living body information; and
registering the extracted vein data and the extracted characteristic amounts,the characteristic amounts including;
a first vein characteristic amount which is a frequency component obtained by characterizing periodicity of veins by performing a Fourier transform on a vein image obtained by reducing the vein data;
a second vein characteristic amount which is an angle component obtained by characterizing a direction of a vein by performing a Fourier transform on the vein image;
a third vein characteristic amount which is a curvature direction component obtained by characterizing a direction of a curvature of a vein of the vein image;
a fourth vein characteristic amount which is a segment direction component obtained by characterizing a direction of a vein segment obtained by dividing a vein of the vein image; and
a fifth vein characteristic amount which is a vein amount obtained by characterizing an amount of veins included in the vein image.
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Accused Products
Abstract
A vein authentication apparatus registers vein data and vein characteristic amounts, determines comparison order at vein data identification time by sorting records in descending order of degree of similarity on the basis of vein characteristic amounts for comparison and the registered vein characteristic amounts, and makes vein data comparison in accordance with the comparison order. The vein authentication apparatus uses 32 frequencies obtained by performing a Fourier transform, 12 angles obtained by performing a Fourier transform, curvature directions in 36 angle areas, segment directions in 18 angle areas, and a vein amount as the vein characteristic amounts. By doing so, the accuracy of comparison order is improved and a comparison using a record for which a degree of similarity is low can be omitted. As a result, the speed of a comparison process and the maximum number of pieces of living body information which can be registered can be increased.
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Citations
15 Claims
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1. A living body information registration method executed by a computer, the method comprising:
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extracting vein data and characteristic amounts from a captured image which is living body information; and registering the extracted vein data and the extracted characteristic amounts, the characteristic amounts including; a first vein characteristic amount which is a frequency component obtained by characterizing periodicity of veins by performing a Fourier transform on a vein image obtained by reducing the vein data; a second vein characteristic amount which is an angle component obtained by characterizing a direction of a vein by performing a Fourier transform on the vein image; a third vein characteristic amount which is a curvature direction component obtained by characterizing a direction of a curvature of a vein of the vein image; a fourth vein characteristic amount which is a segment direction component obtained by characterizing a direction of a vein segment obtained by dividing a vein of the vein image; and a fifth vein characteristic amount which is a vein amount obtained by characterizing an amount of veins included in the vein image.
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2. A biometrics authentication method executed by a computer, the method comprising:
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extracting vein data and characteristic amounts from a captured image which is living body information; acquiring registered vein data and registered characteristic amounts in each record registered in advance; calculating scores indicative of rough degrees of similarity from the extracted characteristic amounts and the acquired registered characteristic amounts; determining comparison order from a result of sorting the scores; and comparing the vein data with the registered vein data in accordance with the determined comparison order, the characteristic amounts and the registered characteristic amounts including; a first vein characteristic amount which is a frequency component obtained by characterizing periodicity of veins by performing a Fourier transform on a vein image obtained by reducing the vein data; a second vein characteristic amount which is an angle component obtained by characterizing a direction of a vein by performing a Fourier transform on the vein image; a third vein characteristic amount which is a curvature direction component obtained by characterizing a direction of a curvature of a vein of the vein image; a fourth vein characteristic amount which is a segment direction component obtained by characterizing a direction of a vein segment obtained by dividing a vein of the vein image; and a fifth vein characteristic amount which is a vein amount obtained by characterizing an amount of veins included in the vein image. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A biometrics authentication apparatus for authenticating a user by living body information, the apparatus comprising:
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an imaging device configured to capture an image of the user'"'"'s veins; a vein database configured to store vein data and characteristic amounts included in the image which is the living body information and which is captured by the imaging device as registered vein data and registered characteristic amounts; and one or more processors configured to perform a procedure comprising; extracting the vein data and the characteristic amounts from the image, the characteristic amounts including; a first vein characteristic amount which is a frequency component obtained by characterizing periodicity of veins by performing a Fourier transform on a vein image obtained by reducing the vein data; a second vein characteristic amount which is an angle component obtained by characterizing a direction of a vein by performing a Fourier transform on the vein image; a third vein characteristic amount which is a curvature direction component obtained by characterizing a direction of a curvature of a vein of the vein image; a fourth vein characteristic amount which is a segment direction component obtained by characterizing a direction of a vein segment obtained by dividing a vein of the vein image; and a fifth vein characteristic amount which is a vein amount obtained by characterizing an amount of veins included in the vein image; registering the extracted vein data and the extracted characteristic amounts in the vein database as the registered vein data and the registered characteristic amounts; acquiring the registered vein data and the registered characteristic amounts from the vein database; calculating scores indicative of rough degrees of similarity from the extracted characteristic amounts and the registered characteristic amounts acquired, and determining comparison order from a result of sorting the scores; and comparing the extracted vein data with the registered vein data acquired in accordance with the determined comparison order.
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Specification