Finger vein authentication apparatus and finger vein authentication method
First Claim
Patent Images
1. A finger vein authentication apparatus comprising:
- a lens array including a plurality of photo-receiving lenses arranged in an array;
a plurality of near-infrared illumination sources placed along opposed ends of the lens array to illuminate a part of a finger with near-infrared light;
an image pickup device to create a picked-up image of a vein based on the near-infrared light scattered inside the finger, transmitted through the vein and gathered by the lens array, the image pickup device creating two kinds of picked-up images by performing line scanning in both of a first direction along an alignment direction of the near-infrared illumination sources and a second direction orthogonal to the first direction and along a lengthwise direction of the finger;
a vein pattern extraction unit to extract vein patterns respectively from the two kinds of picked-up images;
an authentication unit to authenticate the extracted two kinds of vein patterns; and
an imaging range detection unit to detect a relative position of an imaging range of the finger by using at least one of a crease pattern near a first joint and a crease pattern near a second joint of the finger existing in at least one of the two kinds of vein patterns.
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Abstract
A finger vein authentication apparatus includes an image pickup device that creates two kinds of picked-up images by performing line scanning in both of a direction along a lengthwise direction of a finger and a direction orthogonal to the lengthwise direction of the finger, and an imaging range detection unit that detects a relative position of an imaging range of the finger by using at least one of a crease pattern near a first joint and a crease pattern near a second joint of the finger existing in at least one of two kinds of vein patterns.
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Citations
7 Claims
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1. A finger vein authentication apparatus comprising:
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a lens array including a plurality of photo-receiving lenses arranged in an array; a plurality of near-infrared illumination sources placed along opposed ends of the lens array to illuminate a part of a finger with near-infrared light; an image pickup device to create a picked-up image of a vein based on the near-infrared light scattered inside the finger, transmitted through the vein and gathered by the lens array, the image pickup device creating two kinds of picked-up images by performing line scanning in both of a first direction along an alignment direction of the near-infrared illumination sources and a second direction orthogonal to the first direction and along a lengthwise direction of the finger; a vein pattern extraction unit to extract vein patterns respectively from the two kinds of picked-up images; an authentication unit to authenticate the extracted two kinds of vein patterns; and an imaging range detection unit to detect a relative position of an imaging range of the finger by using at least one of a crease pattern near a first joint and a crease pattern near a second joint of the finger existing in at least one of the two kinds of vein patterns. - View Dependent Claims (2, 3, 4, 5)
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6. A finger vein authentication method comprising the steps of:
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illuminating a part of a finger with near-infrared light; gathering the near-infrared light scattered inside the finger and transmitted through a vein by a lens array including a plurality of photo-receiving lenses arranged in an array; creating two kinds of picked-up images by imaging the near-infrared light scattered inside the finger, transmitted through the vein and gathered by the lens array with use of an image pickup device that performs line scanning in both of a direction along a lengthwise direction of the finger and a direction orthogonal to the lengthwise direction of the finger; extracting vein patterns respectively from the two kinds of picked-up images; detecting a relative position of an imaging range of the finger by using at least one of a crease pattern near a first joint and a crease pattern near a second joint of the finger existing in at least one of the two kinds of vein patterns; and authenticating the extracted two kinds of vein patterns.
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7. A finger vein authentication apparatus comprising:
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a lens array including a plurality of photo-receiving lenses arranged in an array; a plurality of near-infrared illumination sources placed along opposed ends of the lens array to illuminate a part of a finger with near-infrared light; an image pickup device to create a picked-up image of a vein based on the near-infrared light scattered inside the finger, transmitted through the vein and gathered by the lens array, the image pickup device creating a picked-up image by performing line scanning in at least one of a first direction along an alignment direction of the near-infrared illumination sources and a second direction orthogonal to the first direction and along a lengthwise direction of the finger; a vein pattern extraction unit to extract a vein pattern from the picked-up image; an authentication unit to authenticate the extracted vein pattern; and an imaging range detection unit to detect a relative position of an imaging range of the finger by using at least one of a crease pattern near a first joint and a crease pattern near a second joint of the finger extracted from the vein pattern.
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Specification