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US 7,352,448 B2Granted
Personal identification system
AssigneeHitachi, Ltd.
InventorsMiyuki Kono, Shin-ichiro Umemura, Takafumi Miyatake, Kunio Harada, Yoshitoshi Ito, Hironori Ueki
Life of this patent
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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.
Claims17
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.
2 more elements
A vessel pattern extracting method comprising the steps of:
- 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.
2 more elements
Dependencies are inferred from the claim text.