Back to results
US 6,813,010 B2Granted
Personal identification system
AssigneeHitachi, Ltd.
InventorsMiyuki Kono, Shin-ichiro Umemura, Takafumi Miyatake, Kunio Harada, Yoshitoshi Ito, Hironori Ueki
Life of this patent
Estimating the term…
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.
Claims10
A personal identification system comprising:
- a light source that shines a light on an imaging region of a living body;
- an imaging unit that detects a transmitted light from the imaging region for capturing an image of the living body;
- and
- an image processing unit that extracts blood vessel patterns of the living body from the image, transformed by said imaging unit, for comparison with blood vessel patterns registered in advance,
- wherein an amount of light shined from said light source is optimized by adjusting an amount of input current to the light source or a shining time duration of the light source until a light intensity of a joint of the living body on the captured image becomes equal to a light intensity reference value.
2 more elements
Dependencies are inferred from the claim text.