Biometric authentication apparatus, biometric authentication method, and program
First Claim
1. A biometric authentication apparatus comprising:
- a vein image extraction unit for emitting a light having a predetermined wavelength to a finger portion and extracting a vein image showing positions of veins from an image including veins in the obtained finger portion;
a vein image dividing unit for dividing the vein image extracted by the vein image extraction unit into a plurality of partial regions;
a vein pixel counting unit for counting the number of pixels corresponding to the veins in each of the partial regions divided by the vein image dividing unit;
a vector generation unit for arranging, in a predetermined order, count results of the respective partial regions provided by the vein pixel counting unit, and generating a vein distribution vector, which is a numerical sequence representing a degree of distribution of the veins in the vein image; and
an authentication unit for authenticating the vein distribution vector generated by the vector generation unit, based on a registered vein distribution vector, which is a vein distribution vector registered in advance.
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Abstract
There is provided a biometric authentication apparatus including a vein image extraction unit for extracting a vein image showing positions of veins from an image including veins in a finger portion, a vein image dividing unit for dividing the extracted vein image into a plurality of partial regions, a vein pixel counting unit for counting the number of pixels corresponding to the veins in each of the divided partial regions, a vector generation unit for arranging, in a predetermined order, count results of the respective partial regions, and generating a vein distribution vector, which is a numerical sequence representing a degree of distribution of the veins in the vein image, and an authentication unit for authenticating the vein distribution vector generated by the vector generation unit, based on a registered vein distribution vector, which is a vein distribution vector registered in advance.
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Citations
9 Claims
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1. A biometric authentication apparatus comprising:
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a vein image extraction unit for emitting a light having a predetermined wavelength to a finger portion and extracting a vein image showing positions of veins from an image including veins in the obtained finger portion; a vein image dividing unit for dividing the vein image extracted by the vein image extraction unit into a plurality of partial regions; a vein pixel counting unit for counting the number of pixels corresponding to the veins in each of the partial regions divided by the vein image dividing unit; a vector generation unit for arranging, in a predetermined order, count results of the respective partial regions provided by the vein pixel counting unit, and generating a vein distribution vector, which is a numerical sequence representing a degree of distribution of the veins in the vein image; and an authentication unit for authenticating the vein distribution vector generated by the vector generation unit, based on a registered vein distribution vector, which is a vein distribution vector registered in advance. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A biometric authentication method comprising the steps of:
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emitting a light having a predetermined wavelength to a finger portion and extracting a vein image showing positions of veins from an image including veins in the finger portion from which the image has been obtained; dividing the extracted vein image into a plurality of partial regions; counting the number of pixels corresponding to the veins in each of the generated partial regions; arranging, in a predetermined order, count results of the respective partial regions, and generating a vein distribution vector, which is a numerical sequence representing a degree of distribution of the veins in the vein image; and authenticating the vein distribution vector generated in the step of generating the vector, based on a registered vein distribution vector, which is a vein distribution vector registered in advance.
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9. A program causing a computer to realize:
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a vein image extraction function for emitting a light having a predetermined wavelength to a finger portion and extracting a vein image showing positions of veins from an image including veins in the finger portion from which the image has been obtained; a vein image dividing function for dividing the vein image extracted by the vein image extraction function into a plurality of partial regions; a vein pixel counting function for counting the number of pixels corresponding to the veins in each of the partial regions divided by the vein image dividing function; a vector generation function for arranging, in a predetermined order, count results of the respective partial regions provided by the vein pixel counting function, and generating a vein distribution vector, which is a numerical sequence representing a degree of distribution of the veins in the vein image; and an authentication function for authenticating the vein distribution vector generated by the vector generation function, based on a registered vein distribution vector, which is a vein distribution vector registered in advance.
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Specification