Title:
【発明の名称】生体識別装置
Document Type and Number:
Japanese Patent JP2947234
Kind Code:
B2
Abstract:
When a finger 8 is put on a fingerprint input sensor 1, it is held in contact with living body potential deriving electrodes 21 and 22. In addition, a finger portion near the first joint is held in contact with a living body grounding electrode 3 to ground the living body. With the finger 8 pushed against the fingerprint input sensor 1 for inputting the fingerprint, finger muscle potentials signals 101 to 103 are obtained from these electrodes. A living body data measuring unit 4 takes differences of these finger muscle potentials for one another, and outputs the result as living body data potential data 104. A living body data analyzing unit 5 analyzes the potential data and frequency data of the living body potential difference data 104, and outputs analysis data 105. A living body discriminating unit 6 makes a determination, from the analysis data 105, as to whether the finger 8 is a finger of living body or a replica finger.
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Inventors:
FUKUZUMI SHINICHI
Application Number:
JP20340497A
Publication Date:
September 13, 1999
Filing Date:
July 29, 1997
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
G06T1/00; G06K9/00; G06T7/00; G07C9/00; A61B5/0488; (IPC1-7): G06T7/00; G06T1/00
Domestic Patent References:
| JP7308308A | ||||
| JP21243A |
Attorney, Agent or Firm:
Tadashi Wakabayashi (4 others)