JPH0295351A - Finger image input device - Google Patents

Finger image input device

Info

Publication number
JPH0295351A
JPH0295351A JP63246216A JP24621688A JPH0295351A JP H0295351 A JPH0295351 A JP H0295351A JP 63246216 A JP63246216 A JP 63246216A JP 24621688 A JP24621688 A JP 24621688A JP H0295351 A JPH0295351 A JP H0295351A
Authority
JP
Japan
Prior art keywords
finger
contact
prism
image information
input device
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
JP63246216A
Other languages
Japanese (ja)
Inventor
Masahiro Takeda
昌弘 竹田
Satoshi Uchida
智 内田
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP63246216A priority Critical patent/JPH0295351A/en
Publication of JPH0295351A publication Critical patent/JPH0295351A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To surely input satisfactory image information by inclining an abutting surface, onto which the belly surface of a finger abuts, in the lengthwise direction of the finger. CONSTITUTION:A prism 3 of a finger image input deice 11 is arranged so that, for an abutting surface 5 of a finger 1, the tip side of a finger 1 is lowered by an inclination at, for example, 45 deg. along a direction to ride on the finger 1, and the positions of an illuminating means 7 and a television camera 9 to the prism 3 are arranged as indicated in a drawing. By giving a force so as to draw the finger to a foreground side at the time of placing the finger 1 on to the abutting surface 5 by a user, the belly surface of the finger 1 works so as to be vertically pressed to the abutting surface 5, thereby, adherence between the finger 1 and abutting surface 5 is made high, and the satisfactory image information can be obtained.

Description

【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、指の腹面の画像情報から個人識別を行なう装
置等に適用される指画像入力装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a finger image input device that is applied to a device or the like that performs personal identification from image information on the pad of a finger.

（従来の技術） 従来、本人確認は、カードや暗証番号等を使用して行わ
れていた。しかし、カードの場合紛失や盗難を生ずるこ
とがあり、暗証番号の場合は、暗証番号を忘れることが
あるという不都合を有している。(Prior Art) Conventionally, identity verification has been performed using a card, a personal identification number, or the like. However, in the case of a card, it may be lost or stolen, and in the case of a personal identification number, there is a problem that the personal identification number may be forgotten.

そこで、近時、個人の身体的な特徴を用いた認証方式が
種々開発されている。その一つに、指紋や指の関節間長
等の指の特徴に基づいて認証する方式がある。この指の
特徴に基づ＜ｇ置方式にあっては、高精度のＩＦｉＥを
行なう上で、指の良好な画像情報を得る必要があり、−
船釣には例えば第３図に示す如き方法による。この方法
では、指１の腹面をプリズム３の当接面５に密着させる
と指１の皮膚の凹凸によって光の全反射の条件が変わる
原理を利用して、照明手段７およびブレビカメラ９を当
接面５に対し第３図に示す如く配置し、プリズム３から
の全反射光と拡散光によって形成される指１の画像をテ
レビカメラ９でＩｌｌするのである。この方法によると
、指１が乾いている場合には、指１の凸部分の密着性が
悪くなり、画像のコントラストが低下するが、指１を適
度な力でプリズム３の当接面５に押しつけているうちに
、指１の表面の発汗作用により指１が適度に湿ってきて
凸部分の密着性が良くなるとともに、画像のコントラス
トが向上し、結果として良好な画像情報を得ることがで
きる。Therefore, recently, various authentication methods using an individual's physical characteristics have been developed. One such method is authentication based on finger characteristics such as fingerprints and finger joint length. Based on this characteristic of the finger, in the <g position method, it is necessary to obtain good image information of the finger in order to perform high-precision IFiE.
For boat fishing, for example, a method as shown in FIG. 3 is used. This method utilizes the principle that when the belly surface of the finger 1 is brought into close contact with the abutting surface 5 of the prism 3, the conditions for total reflection of light change depending on the unevenness of the skin of the finger 1, and the illuminating means 7 and the blurry camera 9 are brought into contact with each other. It is arranged as shown in FIG. 3 with respect to the surface 5, and an image of the finger 1 formed by the total reflection light and diffused light from the prism 3 is captured by a television camera 9. According to this method, if the finger 1 is dry, the adhesion of the convex part of the finger 1 will be poor and the contrast of the image will be reduced. While pressing, the finger 1 becomes moderately moist due to sweating on the surface of the finger 1, improving the adhesion of the convex portion and improving the contrast of the image, resulting in good image information. .

（発明が解決しようとする課題） ところで、上述した方法では、良好な画像情報を得る一
トで、指１の腹面全体をプリズム３の当接面５に適切に
密着する必要がある。しかし、当接面５が第３図に示す
如く水平状態にあると、指１の腹面全体を当接面５に押
しつけにクク２、このために指１の当接面５への密着性
が悪化し、得られる画像情報の質が低下するおそれがあ
った。(Problems to be Solved by the Invention) In the above-described method, it is necessary to properly bring the entire belly surface of the finger 1 into close contact with the contact surface 5 of the prism 3 in order to obtain good image information. However, when the abutment surface 5 is in a horizontal state as shown in FIG. There was a risk that the quality of the obtained image information would deteriorate.

本発明は上記に鑑みてなされたもので、その目的として
は、良好な画像情報の入力を確実にした指画像入力装置
を提供することにある。The present invention has been made in view of the above, and an object of the present invention is to provide a finger image input device that ensures input of good image information.

［発明の構成］ （課題を解決するための手段） 上記目的を達成するため、当接手段に当接された指の腹
面の画像情報を入力する装置において、本発明は、前記
当接手段における指の腹面の当接面が指の長手方向に傾
斜していることを要旨とする。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a device for inputting image information of the pad of a finger that is in contact with a contact means. The gist is that the contact surface of the pad of the finger is inclined in the longitudinal direction of the finger.

また、本発明は、当接手段に当接された指の腹面の画像
情報を入力する装置において、前記当接手段における指
の腹面の当接面が、凸曲面であることを要旨とする。Further, the present invention provides a device for inputting image information of the pad surface of a finger that is in contact with a contact means, in which the contact surface of the pad surface of the finger in the contact means is a convex curved surface.

さらに、本発明は、当接手段に当接された指の腹面の画
像情報を入力する装置において、前記当接手段における
指の腹面の当接面が指の長手方向に傾斜し、且つ凸曲面
であることを要旨とする。Furthermore, the present invention provides a device for inputting image information of the pad surface of a finger that is in contact with a contact means, in which the contact surface of the pad surface of the finger in the contact means is inclined in the longitudinal direction of the finger, and has a convex curved surface. The gist is that

（作用） 本発明に係る指画像入力装置にあっては、指の腹面を当
接させる当接面を、指の長手方向に傾斜させるおよび／
または凸曲面とすることで、指を当接面に押しつけやす
くした。(Function) In the finger image input device according to the present invention, the contact surface that contacts the pad surface of the finger is inclined in the longitudinal direction of the finger and/or
Alternatively, by making it a convex curved surface, it is easier to press the finger against the contact surface.

（実施例） 以下、図面を用いて本発明の詳細な説明する。(Example) Hereinafter, the present invention will be explained in detail using the drawings.

第１図は、本発明の一実施例に係る指画像入力装置１１
を示す図である。その特徴としては、プリズム３を、指
１の当接面５が指１を乗せる方向に沿って例えば４５度
の傾斜をもって指１の先端側が下がるように配置したこ
とにある。なお、プリズム３に対する照明手段７および
テレビカメラ９の相対配置位置としては従来と同様であ
る。FIG. 1 shows a finger image input device 11 according to an embodiment of the present invention.
FIG. Its feature is that the prism 3 is arranged such that the contact surface 5 of the finger 1 is inclined at, for example, 45 degrees along the direction in which the finger 1 is placed so that the tip side of the finger 1 is lowered. Note that the relative positions of the illumination means 7 and the television camera 9 with respect to the prism 3 are the same as in the prior art.

したがって、本実施例によれば、利用者としては指１を
当接面５に置く際に指１を手前側に引き寄せるように力
を加えることで、指１の腹面が当接面５に垂直に押しつ
けられるように働くので、指１と当接面５との密着性が
高（良好な画像情報を得ることができる。Therefore, according to this embodiment, when the user places the finger 1 on the contact surface 5, by applying force to draw the finger 1 toward the user, the pad surface of the finger 1 is perpendicular to the contact surface 5. Since the contact surface 5 acts as if pressed against the finger 1, the contact between the finger 1 and the contact surface 5 is high (good image information can be obtained).

なお、本実施例では、当接面５を指１の先端側が下がる
ようにしたが、逆に指１の付は根側が下がるようにして
もよい。すなわち、当接面５を前方に傾斜させる方法は
、利用者にとって指１を置く位置がおおむね自分の胸の
位置よりも低い場合により適しているのに対し、胸の位
置よりも高い場合には、当接面５は、後方（指゛の付は
根側）に傾斜している方が入力し易くなる場合も考えら
れるためである。特に指紋のみを入力する場合がこれに
該当する。In this embodiment, the abutment surface 5 is arranged such that the tip side of the finger 1 is lowered, but conversely, the base side of the finger 1 may be lowered. In other words, the method of tilting the contact surface 5 forward is more suitable when the position where the user places the finger 1 is lower than the user's chest level, whereas it is more suitable when the position where the finger 1 is placed is higher than the user's chest position. This is because input may be easier if the abutment surface 5 is sloped backward (with the finger attached to the root side). This is particularly the case when only a fingerprint is input.

第２図は、本発明の他の実施例に係る指画像入力装置ｉ
￥１３を示す図である。その特徴としては、指１の当接
面１５が凸曲面に形成されているプリズム１７を用い、
このプリズム１７を当接面１５が指１を乗せる方向に沿
って指１の先端側が下がるように配置したことにある。FIG. 2 shows a finger image input device i according to another embodiment of the present invention.
It is a diagram showing ¥13. Its features include the use of a prism 17 in which the contact surface 15 of the finger 1 is formed into a convex curved surface;
This prism 17 is arranged such that the abutting surface 15 is placed so that the tip of the finger 1 is lowered along the direction in which the finger 1 is placed.

なお、プリズム１７に対する照明手段７およびテレビカ
メラ９の相対配置位置としては従来と同様である。Note that the relative positions of the illumination means 7 and the television camera 9 with respect to the prism 17 are the same as in the prior art.

したがって、本実施例によれば、利用者としては指１を
当接面１５に置く際に指１を手前側に引き寄せるように
力を加えることで、指１の腹面が当接面５に垂直に押し
つけられるように働き、加えて当接面１５が凸曲面とな
っているので、指１と当接面１５との密着性が高く良好
な画像情報を得ることができる。Therefore, according to this embodiment, when the user places the finger 1 on the contact surface 15, by applying force to draw the finger 1 toward the user, the pad surface of the finger 1 is perpendicular to the contact surface 5. In addition, since the contact surface 15 is a convex curved surface, the contact between the finger 1 and the contact surface 15 is high, and good image information can be obtained.

なお、本実施例では、当接面１５を指１の先端側が下が
るようにしたが、前述した理由と同様に逆に指１の付は
根側が下がるようにしてもよい。In this embodiment, the abutting surface 15 is arranged such that the tip side of the finger 1 is lowered, but the base side of the finger 1 may be lowered conversely for the same reason as described above.

また、当接面１５が凸曲面に形成されていることから、
場合によってはプリズム１７自体を傾斜させなくても密
着性を確保できる。In addition, since the contact surface 15 is formed into a convex curved surface,
In some cases, adhesion can be ensured without tilting the prism 17 itself.

さらに、上述した２つの実施例におけるプリズム３．１
７に対する照明手段７およびテレビカメラ９の配置状況
としては、これに限定されるものではなく、例えば照明
手段とテレビカメラがプリズムの同じ面側に配置される
方法でもよい。Furthermore, the prism 3.1 in the two embodiments described above
The arrangement of the illumination means 7 and the television camera 9 with respect to the prism 7 is not limited to this, and for example, the illumination means and the television camera may be arranged on the same side of the prism.

また、上述した２つの実施例では、指を当接する手段と
してプリズムを用いる場合について説明したが、当接手
段は特にプリズムに限定されるものではなく、指の腹面
の凹凸の状態を入力できる条件を満たせば、プリズム以
外の当接手段を使用することも可能である。Further, in the two embodiments described above, a case was explained in which a prism is used as a means for abutting the finger, but the abutting means is not particularly limited to a prism, and the conditions are such that the state of the unevenness of the pad surface of the finger can be input. It is also possible to use contact means other than prisms as long as the following conditions are satisfied.

［発明の効渠］ 以上説明したように、本発明によれば、本発明に係る指
画像入力装置にあっては、指の腹面を当接させる当接面
を、指の長手方向に傾斜させるおよび／または凸曲面と
することで、指を当接面に押しつけやすくしたので、良
好な画像情報を確実に入力することができる。[Effects of the Invention] As explained above, according to the present invention, in the finger image input device according to the present invention, the contact surface that contacts the pad surface of the finger is inclined in the longitudinal direction of the finger. And/or the convex curved surface makes it easier to press the finger against the contact surface, making it possible to reliably input good image information.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示す図、第２図は本発明の
他の実施例を示す図、第３図は、従来例を示す図である
。 １・・・指 ３・・・プリズム ５・・・当接面 ７・・・照明手段 ９・・・テレビカメラ １１・・・指画像入力装置 １３・・・指画像入力装置 １５・・・当接面 １７・・・プリズムFIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing another embodiment of the present invention, and FIG. 3 is a diagram showing a conventional example. 1... Finger 3... Prism 5... Contact surface 7... Illumination means 9... Television camera 11... Finger image input device 13... Finger image input device 15... Contact surface 17...prism

Claims (3)

【特許請求の範囲】[Claims] （１）当接手段に当接された指の腹面の画像情報を入力
する装置において、前記当接手段における指の腹面の当
接面が指の長手方向に傾斜していることを特徴とする指
画像入力装置。(1) A device for inputting image information of the pad surface of a finger that is in contact with a contact means, characterized in that the contact surface of the pad surface of the finger in the contact means is inclined in the longitudinal direction of the finger. Finger image input device. （２）当接手段に当接された指の腹面の画像情報を入力
する装置において、前記当接手段における指の腹面の当
接面が、凸曲面であることを特徴とする指画像入力装置
。(2) A finger image input device for inputting image information of the pad surface of a finger that is in contact with a contact means, wherein the contact surface of the pad surface of the finger in the contact means is a convex curved surface. . （３）当接手段に当接された指の腹面の画像情報を入力
する装置において、前記当接手段における指の腹面の当
接面が指の長手方向に傾斜し、且つ凸曲面であることを
特徴とする指画像入力装置。(3) In a device for inputting image information of the pad surface of a finger in contact with a contact means, the contact surface of the pad surface of the finger in the contact means is inclined in the longitudinal direction of the finger and is a convex curved surface. A finger image input device characterized by:
JP63246216A 1988-09-30 1988-09-30 Finger image input device Pending JPH0295351A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63246216A JPH0295351A (en) 1988-09-30 1988-09-30 Finger image input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63246216A JPH0295351A (en) 1988-09-30 1988-09-30 Finger image input device

Publications (1)

Publication Number Publication Date
JPH0295351A true JPH0295351A (en) 1990-04-06

Family

ID=17145243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63246216A Pending JPH0295351A (en) 1988-09-30 1988-09-30 Finger image input device

Country Status (1)

Country Link
JP (1) JPH0295351A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008029630A1 (en) 2006-09-07 2008-03-13 Olympus Medical Systems Corp. Encapsulated endoscope

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008029630A1 (en) 2006-09-07 2008-03-13 Olympus Medical Systems Corp. Encapsulated endoscope

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