JPH05309082A - Dry finger detecting method for fingerprint recognizing/ discriminating device - Google Patents

Dry finger detecting method for fingerprint recognizing/ discriminating device

Info

Publication number
JPH05309082A
JPH05309082A JP4163301A JP16330192A JPH05309082A JP H05309082 A JPH05309082 A JP H05309082A JP 4163301 A JP4163301 A JP 4163301A JP 16330192 A JP16330192 A JP 16330192A JP H05309082 A JPH05309082 A JP H05309082A
Authority
JP
Japan
Prior art keywords
finger
dry
wet
fingerprint
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4163301A
Other languages
Japanese (ja)
Inventor
Yoshihide Matsumura
喜秀 松村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MATSUMURA ELECTRON KK
OTEIASU KK
Original Assignee
MATSUMURA ELECTRON KK
OTEIASU KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MATSUMURA ELECTRON KK, OTEIASU KK filed Critical MATSUMURA ELECTRON KK
Priority to JP4163301A priority Critical patent/JPH05309082A/en
Publication of JPH05309082A publication Critical patent/JPH05309082A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

PURPOSE:To measure a dry or wet state of a finger, and to simplify the fingerprint detection by providing an electrode in the part of the ball of a finger, and measuring a resistance value by this electrode, in a fingerprint detecting part. CONSTITUTION:A finger 2 is placed on a fingerprint detecting part 1, and also, a resistance value is converted to a voltage value by a resistance value detecting electrode 3, and it is converted to a digital signal by an A/D converter or a comparator 4, and decided by a CPU 5. In this case, in the fingerprint detecting part, it takes time for a dry finger or a wet finger, to make a decision. Therefore, in order to prevent it, it is necessary to pay attention to a fact that a finger is dry or wet. By such a measurement, a fingerprint detection failure caused by a fact that a finger is dry or wet is decided, and a wasteful deciding time is eliminated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、指の乾燥又は濡れによ
る指紋検出不良を判定し、無駄な判定時間を無くす事
と、操作者に判定に必要な指の状態を指示する事が可能
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to determine a fingerprint detection failure due to dryness or wetness of a finger, eliminate wasteful determination time, and instruct the operator of the finger state necessary for the determination. is there.

【０００２】[0002]

【従来の技術】従来は、指が乾燥又は濡れている時も判
定に入ってしまい無駄な判定を行っていた。2. Description of the Related Art Conventionally, even when a finger is dry or wet, the determination is started and useless determination is performed.

【０００３】[0003]

【発明が解決しようとする課題】指紋検出部において、
乾燥している指又は濡れている指は、判定に時間がかか
ってしまう点である。In the fingerprint detecting section,
A dry finger or a wet finger is a point where determination takes time.

【０００４】[0004]

【課題を解決する為の手段】指が乾燥又は濡れているか
を検出する為に、電極を用いその抵抗値により電圧検出
しＡ／Ｄコンバータ又はコンパレータにより、その抵抗
値を検出し判定するかしないかをＣＰＵが決定する事を
可能としている。[Means for Solving the Problems] In order to detect whether a finger is dry or wet, a voltage is detected by the resistance value of an electrode, and the resistance value is detected by an A / D converter or a comparator. It is possible for the CPU to decide whether or not.

【０００５】[0005]

【実施例】指紋検出部に指を置き、尚且つ抵抗値検
出電極にて抵抗値を電圧値に変換し、Ａ／Ｄコンバー
タ又はコンパレータにてデジタル信号にし、ＣＰＵ
にて判定する。[Example] A finger is placed on the fingerprint detection unit, and the resistance value is converted into a voltage value by the resistance value detection electrode, and converted into a digital signal by the A / D converter or the comparator, and the CPU
Determine with.

【０００６】[0006]

【発明の効果】以上説明したように指紋検出部におい
て、乾燥している指又は濡れている指の判定時間の無駄
が無くなり、指紋を検出する事が簡単に行う事が可能と
なる。As described above, in the fingerprint detecting section, waste of determination time for a dry finger or a wet finger is eliminated, and it is possible to easily detect a fingerprint.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の１実施例の図である。FIG. 1 is a diagram of one embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１．指紋検出部 ２．指 ３．抵抗値検出電極 ４．抵抗値測定用Ａ／Ｄコンバータ又はコンパレータ ５．ＣＰＵユニット 1. Fingerprint detector 2. Finger 3. Resistance detection electrode 4. 4. A / D converter or comparator for resistance value measurement CPU unit

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 指紋検出部において、乾燥している指
又は濡れている指は、指紋を検出する事が難しく判定に
時間がかかってしまう、これを防止する為と、操作者に
指が乾燥又は濡れている事の注意が必要である。この為
に、指の腹の部分に電極を設け、この電極にて抵抗値を
測定し乾燥又は、濡れ具合を測定することを可能として
いる。1. In the fingerprint detection unit, it is difficult to detect a fingerprint with a dry finger or a wet finger, and it takes a long time to make a judgment. In order to prevent this, the operator's finger is dried. Or be careful of being wet. For this reason, an electrode is provided on the part of the finger pad, and it is possible to measure the resistance value and measure the dryness or wetness with this electrode.
JP4163301A 1992-05-12 1992-05-12 Dry finger detecting method for fingerprint recognizing/ discriminating device Pending JPH05309082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4163301A JPH05309082A (en) 1992-05-12 1992-05-12 Dry finger detecting method for fingerprint recognizing/ discriminating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4163301A JPH05309082A (en) 1992-05-12 1992-05-12 Dry finger detecting method for fingerprint recognizing/ discriminating device

Publications (1)

Publication Number Publication Date
JPH05309082A true JPH05309082A (en) 1993-11-22

Family

ID=15771229

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4163301A Pending JPH05309082A (en) 1992-05-12 1992-05-12 Dry finger detecting method for fingerprint recognizing/ discriminating device

Country Status (1)

Country Link
JP (1) JPH05309082A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7606398B2 (en) 2001-12-07 2009-10-20 Idex Asa Sensor for measurement for wet and dry fingers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7606398B2 (en) 2001-12-07 2009-10-20 Idex Asa Sensor for measurement for wet and dry fingers

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