Authentication device and authentication method
AssigneeFujitsu Limited
InventorsSoichi Hama, Satoshi Maeda, Yukihiro Abiko
Life of this patent
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Abstract
An authentication device includes an illumination device, a camera, and a processor configured to obtain, by capturing by the camera, an image including a subject illuminated with light of the illumination device, extract a target region from the obtained image, and perform determination that processing related to authentication is not allowed when the target region includes a first part of a first luminance value having a difference not less than a threshold value from a second luminance value of a second part of the target region.
Claims17
An authentication device comprising:
- an illumination device;
- a camera;
- and
- a processor coupled to the camera and the processor configured to
- obtain, by capturing by the camera, an image including a subject illuminated by light from the illumination device,
- extract a target region of the subject from the obtained image, and
- in response that a difference between a first luminance value and a second luminance value is greater than a threshold, determine that the subject included in the image is not a living body to dismiss a result of processing related to authentication for the subject, the first luminance value being a luminance value based on a first part in the extracted target region, the second luminance value being a luminance value based on a second part in the extracted target region, the first part being a part other than the second part in the extracted target region.
A computer-implemented authentication method comprising:
- obtaining, by capturing by a camera, an image including a subject illuminated by light from an illumination device;
- extracting a target region of the subject from the obtained image;
- and
- in response that a difference between a first luminance value and a second luminance value is greater than a threshold, determining that the subject included in the image is not a living body to dismiss a result of processing related to authentication for the subject, the first luminance value being a luminance value based on a first part in the extracted target region, the second luminance value being a luminance value based on a second part in the extracted target region, the first part being a part other than the second part in the extracted target region.
A non-transitory computer-readable medium storing authentication program instructions executable by one or more computers, the authentication program instructions comprising:
- one or more instructions for obtaining, by capturing by a camera, an image including a subject illuminated by light from an illumination device;
- one or more instructions for extracting a target region of the subject from the obtained image;
- and
- one or more instructions for performing, in response that a difference between a first luminance value and a second luminance value is greater than a threshold, a determination that the subject included in the image is not a living body to dismiss a result of processing related to authentication for the subject, the first luminance value being a luminance value based on a first part in the extracted target region, the second luminance value being a luminance value based on a second part in the extracted target region, the first part being a part other than the second part in the extracted target region.
Dependencies are inferred from the claim text.