Biometrics authentication method biometrics authentication device and blood vessel image reading device
First Claim
1. A biometrics authentication device, which uses blood vessel images of a body to perform individual authentication, comprising:
- an image capture device, which captures images of blood vessels in the body;
a temperature detector, which detects the temperature of the body;
an IC card reader/writer, which reads/writes an IC card which is stored characteristic data of blood vessel image of a user and the temperature at the time of registration of the blood vessel image characteristic data; and
a control unit, which extracts the blood vessel image characteristic data from the captured blood vessel images and verifies captured the blood vessel image characteristic data against the blood vessel image characteristic data registered in the IC card in a verification processing, wherein the control unit detects the temperature during capture of the blood vessel image from the temperature detector, and distinguishes the cause of a verification error from the difference in the temperature detected at the time of the image capture and the temperature at the time of registration in the IC card.
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Abstract
A biometrics authentication device, which uses blood vessel images of a human body to perform individual authentication, performs verification processing according to a detected body temperature. A temperature sensor, which detects the temperature of a body, is provided in a blood vessel image capture device. The temperature at the time of registration of a blood vessel image is stored together with the blood vessel image, and the temperature of the body at the time of use (at the time of verification) is detected; the temperature difference at the time of registration and at the time of use is reflected in the verification processing, and when there is a verification error, the cause of the verification error is judged from the temperatures at the time of registration and at the time of use. Whether a verification error is due to temperature can be easily distinguished.
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Citations
20 Claims
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1. A biometrics authentication device, which uses blood vessel images of a body to perform individual authentication, comprising:
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an image capture device, which captures images of blood vessels in the body;
a temperature detector, which detects the temperature of the body;
an IC card reader/writer, which reads/writes an IC card which is stored characteristic data of blood vessel image of a user and the temperature at the time of registration of the blood vessel image characteristic data; and
a control unit, which extracts the blood vessel image characteristic data from the captured blood vessel images and verifies captured the blood vessel image characteristic data against the blood vessel image characteristic data registered in the IC card in a verification processing, wherein the control unit detects the temperature during capture of the blood vessel image from the temperature detector, and distinguishes the cause of a verification error from the difference in the temperature detected at the time of the image capture and the temperature at the time of registration in the IC card. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A biometrics authentication method, which uses blood vessel images of a body to perform individual authentication, comprising the steps of:
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capturing an image of blood vessels in the body using an image capture device;
detecting the temperature of the body, using a temperature detector;
reading the characteristic data of a blood vessel image of a user and the temperature at the time of registration of the blood vessel image characteristic data from an IC card;
extracting the blood vessel image characteristic data from the captured blood vessel image and verifying the blood vessel image characteristic data against the blood vessel image characteristic data registered on the IC card in a verification processing; and
detecting the temperature at the time of capture of the blood vessel image from the temperature detector, and of distinguishing the cause of a verification error from the difference between the temperature detected at the time of the image capture and the temperature at the time of registration in the IC card. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A blood vessel image reading device, used in a biometrics authentication device which verifies a captured image of blood vessels in a body against a registered blood vessel image to perform individual authentication, comprising:
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an image capture unit which captures images of blood vessels in the body; and
a temperature detector which detects the temperature of the body, for reflection in the verification. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification