Personal identification system
First Claim
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1. A personal identification apparatus comprising:
- a light source that radiates light onto a finger of a person to be identified;
an imaging unit which captures a transmitted light from the finger irradiated by the light of the light source; and
an image processing unit which extracts a vessel pattern of the finger in accordance with an image which has been captured by the imaging unit;
wherein an amount of light of the light of the light source is arranged to be controlled in accordance with information on a position within the finger to be irradiated by the light, and the image processing unit extracts the vessel pattern in accordance with the image having been captured with the light whose amount has been controlled.
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Abstract
A personal identification system, which uses a vein pattern of a finger, optimizes the amount of light of a light source based on a captured finger image and emphasizes the vein pattern during image processing for identification.
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Citations
17 Claims
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1. A personal identification apparatus comprising:
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a light source that radiates light onto a finger of a person to be identified; an imaging unit which captures a transmitted light from the finger irradiated by the light of the light source; and an image processing unit which extracts a vessel pattern of the finger in accordance with an image which has been captured by the imaging unit; wherein an amount of light of the light of the light source is arranged to be controlled in accordance with information on a position within the finger to be irradiated by the light, and the image processing unit extracts the vessel pattern in accordance with the image having been captured with the light whose amount has been controlled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A vessel pattern extracting method comprising the steps of:
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irradiating a finger to be imaged with a light from a light source provided within a persona identification apparatus; imaging the light transmitted from the finger through a window provided within the persona identification apparatus; and extracting vessel pattern for a personal identification operation; wherein an amount of light of the light source is arranged to be controlled in accordance with information on a position within the finger to be irradiated, and wherein the vessel pattern is extracted based on the vessel patterns with the light whose amount has been controlled.
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Specification