JPH07220054A - Detection part for surface rugged pattern measurer and its utilizing method - Google Patents

Detection part for surface rugged pattern measurer and its utilizing method

Info

Publication number
JPH07220054A
JPH07220054A JP3297194A JP3297194A JPH07220054A JP H07220054 A JPH07220054 A JP H07220054A JP 3297194 A JP3297194 A JP 3297194A JP 3297194 A JP3297194 A JP 3297194A JP H07220054 A JPH07220054 A JP H07220054A
Authority
JP
Japan
Prior art keywords
transparent solid
pressing
measured
air
image
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
JP3297194A
Other languages
Japanese (ja)
Inventor
Chiaki Fujii
千秋 藤井
Original Assignee
Chiaki Fujii
千秋 藤井
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 Chiaki Fujii, 千秋 藤井 filed Critical Chiaki Fujii
Priority to JP3297194A priority Critical patent/JPH07220054A/en
Publication of JPH07220054A publication Critical patent/JPH07220054A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To provide the detection part for surface rugged pattern measurer and its utilizing method which facilitate detection of a surface rugged pattern of a fingerprint, an object, or the like to improve the identification precision. CONSTITUTION:With respect to the surface rugged pattern measurer where illuminating light is thrown to the inside of a transparent solid body 1 having a refractive index higher than that of air and the intensity distribution of light reflected to the transparent solid body side by a face 2, to which an object 4 to be measured is pressed, of the transparent solid body is optically detected by a photodetector group 3, the transparent solid body or an adjacent support body of the object 4 are oscillated in such direction that the interval between the face 2 and the object 4 is changed, and volatile liquid and air are sprayed to the face 2 of the transparent solid body or/and the object 4.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は指紋や物体の表面おうと
つ模様を自動的に測定又は同定する表面おうとつ模様測
定器の検出部の構造及びその活用方法に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a detecting portion of a surface-dying pattern measuring device for automatically measuring or identifying a surface-dying pattern of a fingerprint or an object and a method of utilizing the same.
【0002】[0002]
【従来の技術】例えば指紋の同定の例では、従来技術と
してガラス板の表面に指を押圧して位置決めし、ガラス
板の反対面からこれを読みとるいくつかの方法が提案さ
れている。しかしこれらのいずれの方法でも指紋の検出
が不確実であり、繰り返しの精度が悪いばかりでなく、
個人差が著しく大きかった。その原因としてガラス板面
や対象とする指面の水分や油脂分の違いや汚れや、一画
面で全体が鮮明な画像は得にくいことなどが考えられる
が、この問題を克服する技術の提案は装置全体の改善や
解析・計算手法の改善がほとんどで、計算や装置が複雑
なものとなっている。
2. Description of the Related Art For example, in the case of identifying a fingerprint, as a conventional technique, several methods have been proposed in which a finger is pressed against the surface of a glass plate to position the finger and the finger is read from the opposite surface of the glass plate. However, not only is the detection of fingerprints uncertain by either of these methods, and the accuracy of repetition is poor,
The individual difference was extremely large. Possible causes are differences in water and oil content on the glass plate surface and the target finger surface, stains, and it is difficult to obtain a clear image on a single screen, but we have proposed a technology to overcome this problem. Most of the improvements were in the overall equipment and analysis / calculation methods, and the calculations and equipment were complicated.
【0003】[0003]
【発明が解決しようとする課題】本発明は指紋や物体等
の表面おうとつ模様の検出を容易にし、広い範囲にわた
って画像を鮮明にし、同定精度を向上する表面おうとつ
模様測定器の検出部及びその活用方法を提供することを
目的とする。
DISCLOSURE OF THE INVENTION The present invention facilitates the detection of surface droopy patterns such as fingerprints and objects, makes the image clear over a wide range, and improves the identification accuracy. The purpose is to provide the utilization method.
【0004】[0004]
【課題を解決するための手段】本発明は次のように構成
される。 (1)照明光を空気よりも屈折率の高い透明固体内部へ
送ってこの透明固体の被測定物押圧面でその透明固体側
へ反射される光の強度分布を受光素子群により光学的に
検出するように構成する表面おうとつ模様測定器におい
て、透明固体またはこれに隣接する被測定物支持体がそ
の被測定物押圧面と被測定物との間隔を変化する方向に
振動する構造とすること、そしてこの透明固体の被測定
物押圧面又は被測定物又はその両方に向かって揮発性液
体と空気を噴射する構造とすることを特徴とする表面お
うとつ模様測定器の検出部である。
The present invention is constructed as follows. (1) Illumination light is sent to the inside of a transparent solid having a higher refractive index than air, and the intensity distribution of the light reflected to the transparent solid side by the surface of the transparent solid pressed against the object to be measured is optically detected by the light receiving element group. In the surface dimple pattern measuring device configured as described above, a structure in which the transparent solid or the object support adjacent to it is vibrated in a direction in which the distance between the object pressing surface and the object is changed The detection unit of the surface pattern measuring device is characterized in that the volatile liquid and the air are ejected toward the object-pressing surface of the transparent solid or the object or both of the objects.
【0005】例えば図1または図2に示すような照明光
を空気よりも屈折率の高い透明固体内部1へ送ってこの
透明固体の被測定物押圧面2でその透明固体側へ反射さ
れる光の強度分布を受光素子群3により光学的に検出す
るように構成する表面おうとつ模様測定器において、透
明固体(図1)またはこれに隣接する被測定物支持体及
びこれに支持される被測定物(図2)がその被測定物押
圧面2と被測定物4との間隔や接触面積を変化する方向
に振動する構造とする。透明固体の被測定物押圧面また
はこれに隣接する被測定物支持体を振動させるには、例
えば公知の電磁的手段やカムの回転などの機械的手段を
用いることができる。揮発性液体としてはエタノールや
メタノールなど被測定物に無害で洗浄力が強く、即乾性
で安価な溶剤が望ましく、これに他の添加剤や水を混入
させることができる。噴射する空気は揮発性液体の揮発
乾燥を促進させるために除湿しておくか昇温して用いる
のが望ましい。揮発性液体や空気の配管は途中までは分
岐されているが、噴射ノズル部5では合流して空気を揮
発性液体の噴射に利用することが望ましい。また測定環
境は温度や湿度を所定の条件に整えることが望ましい。
For example, the illumination light as shown in FIG. 1 or FIG. 2 is sent to the inside 1 of a transparent solid having a refractive index higher than that of air, and the light reflected by the object pressing surface 2 of this transparent solid toward the transparent solid side. In the surface dimple pattern measuring device configured to optically detect the intensity distribution of the light by the light receiving element group 3, the transparent solid (FIG. 1) or an object support adjacent to the transparent solid and the object to be measured supported by the same. The object (FIG. 2) vibrates in a direction in which the distance between the object pressing surface 2 and the object 4 and the contact area change. In order to vibrate the object pressing surface of the transparent solid or the object support adjacent to the object pressing surface, known mechanical means such as electromagnetic means or cam rotation can be used. As the volatile liquid, a solvent such as ethanol or methanol which is harmless to the object to be measured, has a strong detergency, is quick-drying and is inexpensive, and other additives and water can be mixed therein. It is desirable to dehumidify or raise the temperature of the jetted air in order to accelerate the volatilization and drying of the volatile liquid. Although the volatile liquid and air pipes are partially branched, it is desirable that the jet nozzle unit 5 joins and use the air for jetting the volatile liquid. In addition, it is desirable that the measurement environment be adjusted to a predetermined temperature and humidity.
【0006】本発明では透明固体またはこれに隣接する
被測定物支持体がその被測定物押圧面2と被測定物4と
の間隔を変化する方向に振動する構造とすることによっ
て、例えば指を極めて短時間に複数回繰り返して被測定
物押圧面に押圧することができ、人が繰り返し指を押圧
する効果を生じさせることができるが、本発明には繰り
返しによって生じる被測定物の位置ずれを最小限にする
優れた効果がある。透明固体の被測定物押圧面2又は被
測定物4又はその両方の表面に揮発性液体を吹き付けて
これらを洗浄して汚れによる外乱を除去し、測定条件を
調整する。また両者の接触面の濡れ面積が大きな状態か
ら小さないわゆる乾燥状態まで意図的に広範囲に変化さ
せる。このとき空気の吹き付けと透明固体の振動による
両者間の間隔変化や接触状態変化により両者間の濡れ面
積を短時間に減少して測定時間を短縮し、測定条件を広
範囲に変化させる多くの情報を取込むことができる。こ
のように両者の接触面を濡れた状態から乾いた状態まで
変化させて画像を記録すれば、この間の両者の接触状態
の変化を克明に精度良く記録することが可能となる。す
なはちこの中から最適画像を選択することや濡れ部と乾
き部の境界付近に現れる微妙な画像変化を高精度で検出
して、この移動する境界部の高精度の画像を合成して画
面全体を高精度化するこが可能になる。なお本発明では
濡れ部の画像を鮮明化するために、図1に示すように透
明個体の被測定物押圧面2の照明光入射角Aを揮発性液
体による濡れがない場合に全反射が生じる角度以上と
し、揮発性液体による濡れがある場合にはその揮発性液
体側へ光が進入できる角度とするのが望ましい。こうす
ることによって揮発性液体による濡れが無い部分は入射
光が全反射し、濡れている部分は部分反射されるので、
反射光の強さによって両者が明瞭に区分でき、画像の明
暗2値化が短時間で簡単にできるようになる。
According to the present invention, a transparent solid or an object support adjacent to the transparent solid vibrates in a direction in which the distance between the object pressing surface 2 and the object 4 is changed so that, for example, a finger is moved. It is possible to repeatedly press the object pressing surface a plurality of times in an extremely short time, and it is possible to produce the effect that a person repeatedly presses a finger. It has the excellent effect of minimizing it. The volatile liquid is sprayed on the surface of the transparent solid to be pressed against the object to be measured 2 or the surface of the object to be measured 4 or both of them to remove disturbances due to dirt and adjust measurement conditions. Further, the wetted area of the contact surfaces of the two is intentionally changed in a wide range from a large state to a small so-called dry state. At this time, the amount of information that changes the measurement conditions over a wide range can be shortened by reducing the wetted area between the two in a short time due to the change in the distance between the two and the change in the contact state due to the blowing of air and the vibration of the transparent solid. Can be captured. In this way, when the image is recorded by changing the contact surfaces of the two from the wet state to the dry state, it is possible to record the change in the contact state of the two during this time with high accuracy. In other words, selecting the optimum image from among these and detecting subtle image changes that appear near the boundary between the wet part and the dry part with high accuracy, synthesizing the high-precision image of this moving boundary part and displaying it. It is possible to improve the accuracy of the whole. In the present invention, in order to make the image of the wet portion clear, total reflection occurs when the illumination light incident angle A of the transparent object pressure surface 2 is not wet by the volatile liquid as shown in FIG. It is desirable that the angle is equal to or larger than the angle, and that the light can enter the side of the volatile liquid when it is wet by the volatile liquid. By doing this, the incident light is totally reflected on the part that is not wet by the volatile liquid, and the wet part is partially reflected.
The two can be clearly distinguished by the intensity of the reflected light, and the light and dark binarization of the image can be easily performed in a short time.
【0007】(2)照明光を空気よりも屈折率の高い透
明固体内部へ送ってこの透明固体の被測定物押圧面でそ
の透明固体側へ反射される光の強度分布を受光素子群に
より光学的に検出するように構成する表面おうとつ模様
測定器において、透明固体またはこれに隣接する被測定
物支持体がその被測定物押圧面と被測定物4との間隔を
変化する方向に振動する構造とし、そしてこの透明固体
の被測定物押圧面又は被測定物又はその両方に向かって
揮発性液体と空気を噴射する構造とする表面おうとつ模
様測定器の検出部を用いて、被測定物の同一位置の表面
おうとつ模様の時間変化の影響を示す一連の画像を作成
して、これらの画像を比較解析合成して必要情報を抽出
することを特徴とする表面おうとつ模様測定器の活用方
法である。
(2) Illumination light is sent to the inside of a transparent solid having a refractive index higher than that of air, and the intensity distribution of the light reflected to the transparent solid side by the object pressing surface of the transparent solid is optically analyzed by a light receiving element group. In the surface irregular pattern measuring device configured to detect automatically, the transparent solid or the object support adjacent thereto vibrates in the direction in which the distance between the object pressing surface and the object 4 changes. A structure, and a structure in which a volatile liquid and air are jetted toward the object pressing surface of the transparent solid or the object to be measured, or both of them, using the detection part of the surface dagger pattern measuring device. Utilization of surface diaper pattern measuring instrument characterized by creating a series of images showing the effect of time variation of surface diaper pattern at the same position in Is the way.
【0008】本発明では前述の表面おうとつ模様測定器
の検出部を用いて、被測定物4の同一位置の表面おうと
つ模様の時間変化の影響を示す一連の画像を作成して、
これらの画像を比較解析合成して必要情報を抽出するこ
とができる。本発明では被測定物4の表面おうとつ模様
を精度良く測定するために、透明固体の被測定物押圧面
2と被測定物4の測定面に外乱となる汚れを揮発性液体
と空気を吹き付けることによって除去して両者の表面状
態を検査に適した所定の状態に調整する。そして両者の
接触面の濡れの条件である液体の付着量と押圧力の両方
を短時間に広範囲に変化させる。すなはち透明固体また
はこれに隣接する被測定物支持体がその被測定物押圧面
2と被測定物4との間隔を変化する方向に振動して、図
3に示すように時間とともに両者の押圧力を周期的に変
化させ、両者の接触面積を同様に変化させる。そして前
記のように透明固体の被測定物押圧面2又は被測定物4
又はその両方に向かって揮発性液体と空気を噴射して、
図4に示すように両者の間の濡れ面積を時間とともに変
化させる。これらの効果を利用することによって被測定
物4の同一位置の表面おうとつ模様の時間変化の影響を
示す一連の画像を作成して、これらの画像を比較解析合
成した特徴の明瞭な高精度の画像を抽出することができ
るようになる。このように両者の接触面を濡れた状態か
ら乾いた状態まで変化させることによって、この間の両
者の接触状態の変化を克明に精度良く記録することを可
能となる。すなはちこの多くの画像の中から最適画像を
選択することができるし、連続する静止画像間の変化か
らその特徴を抽出することができるし、濡れ部と乾き部
の境界付近や、接触部と非接触部の境界付近のリング状
域に現れる精細な画像や微妙な画像変化を高精度で検出
してその特徴を抽出明確化し、この静止画像間で移動す
る境界部の高精度の画像を合成して高精度画像域を画面
全体に広げることや、その特徴を広範囲にわたって明確
にし、かつ抽出することも可能になる。本発明ではこの
ような画像の比較解析合成は1回の指挿入中に行えるた
め、人力によって複数回指を挿入して測定する場合より
も位置ずれが著しく小さいために画像合成が容易であ
り、画像精度が高く、指挿入検査時間や判定時間も著し
く短くて済む利点が得られる。本発明の方法により例え
ば指紋同定では、あらかじめ登録した指紋の模様と同じ
印刷物や人造指による指紋等の偽造品を、濡れの変化状
態や濡れ部と乾き部の境界部の変化状況の差異によって
判別して排除することができる。また被測定物の動的な
形状変化や表面状況変化をとらえることもでき、これも
同定精度の向上に用いることができる。
In the present invention, a series of images showing the influence of the temporal change of the surface irregular pattern at the same position of the object 4 to be measured are created by using the detecting portion of the surface irregular pattern measuring device described above.
Necessary information can be extracted by comparing, analyzing, and synthesizing these images. In the present invention, in order to measure the surface irregular pattern of the DUT 4 with high accuracy, the volatile liquid and air are sprayed on the transparent pressing surface 2 of the DUT and the measuring surface of the DUT 4 as a disturbance to cause disturbance. Then, the surface conditions of the both are adjusted to a predetermined condition suitable for the inspection. Then, both the liquid adhesion amount and the pressing force, which are the conditions for wetting the contact surfaces of the two, are changed over a wide range in a short time. That is, the transparent solid or the object support adjacent to it vibrates in the direction in which the distance between the object pressing surface 2 and the object 4 changes, and as shown in FIG. The pressing force is periodically changed, and the contact area between the two is also changed. Then, as described above, the pressing surface 2 or the measured object 4 which is a transparent solid is measured.
Or by injecting volatile liquid and air towards both,
As shown in FIG. 4, the wetted area between the two is changed with time. By utilizing these effects, a series of images showing the influence of the time-dependent change of the surface drooping pattern at the same position of the DUT 4 is created, and these images are compared, analyzed and synthesized with a clear and high-precision characteristic. You will be able to extract images. By changing the contact surfaces of the two from the wet state to the dry state in this way, it is possible to accurately and accurately record the change in the contact state between the two. The optimum image can be selected from many images, and its features can be extracted from the changes between consecutive still images, and the vicinity of the boundary between wet and dry parts and the contact part can be extracted. The precise images and subtle image changes that appear in the ring-shaped region near the boundary between the non-contact part and the non-contact part are detected with high accuracy to clarify and extract their characteristics, and a high-precision image of the boundary part that moves between these still images is displayed. It is also possible to combine them to expand the high-precision image area over the entire screen, and to clarify and extract the features over a wide range. In the present invention, since such comparative analysis / synthesis of images can be performed during one finger insertion, the positional displacement is remarkably smaller than that in the case of manually inserting and measuring a plurality of fingers, and thus image synthesis is easy. The advantages are that the image accuracy is high and the finger insertion inspection time and the determination time are extremely short. According to the method of the present invention, for example, in fingerprint identification, a printed matter having the same pattern as a fingerprint registered in advance or a counterfeit product such as a fingerprint made by an artificial finger is discriminated by a change state of wetness or a change state of a boundary portion between a wet portion and a dry portion. Can be eliminated. Further, it is possible to detect a dynamic shape change or surface condition change of the object to be measured, which can also be used for improving the identification accuracy.
【0009】(3)照明光を空気よりも屈折率の高い透
明固体内部へ送ってこの透明固体の被測定物押圧面でそ
の透明固体側へ反射される光の強度分布を受光素子群に
より光学的に検出するように構成する表面おうとつ模様
測定器において、透明固体またはこれに隣接する被測定
物支持体がその被測定物押圧面と被測定物との間隔を変
化する方向に振動する構造とし、そしてこの透明固体の
被測定物押圧面又は被測定物又はその両方に向かって揮
発性液体と空気を噴射する構造とする表面おうとつ模様
測定器の検出部を用いて、被測定物の同一位置の表面お
うとつ模様の時間変化の影響を示す一連の画像を作成し
て、これらの画像を比較解析合成して必要情報を抽出す
ること、そして被測定物に噴射した揮発性液体又はその
気体を含む流体を成分分析してあらかじめ登録された情
報と対比し一致を判定することを特徴とする表面おうと
つ模様測定器の活用方法である。
(3) Illumination light is sent to the inside of a transparent solid having a refractive index higher than that of air, and the intensity distribution of the light reflected to the transparent solid side by the object pressing surface of this transparent solid is optically analyzed by a light receiving element group. In a surface dimple pattern measuring device configured to detect automatically, a structure in which a transparent solid or an object support adjacent to the transparent object vibrates in a direction in which the distance between the object pressing surface and the object changes And the surface of the transparent solid pattern measuring device having a structure in which a volatile liquid and air are jetted toward the object-pressing surface of the transparent solid or the object-to-be-measured or both, and the object-to-be-measured is measured. Create a series of images showing the effect of time-dependent changes in the surface of the same pattern, and extract the necessary information by comparing, analyzing, and synthesizing these images, and the volatile liquid sprayed on the measured object or its Fluid containing gas And min analysis, a method utilizing a surface uneven pattern measuring device, characterized in that to determine the contrast consistent with previously registered information.
【0010】本発明では前述の方法に加えて、被測定物
4に噴射した揮発性液体又はその気体を含む流体を成分
分析することを特徴とする表面おうとつ模様測定器の活
用方法である。分析機器としては公知の迅速分析機器類
を用いることができる。揮発性液体の多くは油脂分など
の有機物の溶解度が高いので、指等の被測定物4の洗浄
効果が大きく、この溶液等を成分分析することによっ
て、個体によって特徴のある成分をあらかじめ登録され
ている成分と比較し、その同定精度を向上することがで
きる。また生体特有の成分の有無を判定することによっ
て生体の判定とみなし、偽造品を排除することができ
る。本発明では好ましくは図1に示す光学的温度測定装
置7によって被測定物4の温度変化を測定して、あらか
じめ登録されている温度変化と比較し、その同定精度を
向上することができ、また生体特有の温度変化と対比す
ることによって生体であるか否かを判定することができ
る。被測定物の温度の絶対値はその時の気候や室温など
の環境条件に大きく影響されて同定に重要な情報は得難
いが、揮発性液体と空気を噴射して濡れから乾きにかわ
る過程を物理的振動をともなう環境で温度変化として評
価すれば、その温度変化の形態から被測定物の同定に重
要な情報を得ることができる。例えば噴射する空気の温
度や速度や流量や、被測定物の接触する透明固体の温度
が一定の場合には、揮発性液体の気化熱による抜熱効果
と物理的振動に伴う発熱効果の相反する効果が被測定物
表層部に生じ、その温度変化には被測定物の特徴が現れ
る。
In addition to the above-mentioned method, the present invention is a method of utilizing a surface dent pattern measuring device characterized by performing a component analysis of a fluid containing a volatile liquid or its gas sprayed onto the object to be measured 4. As the analytical instrument, known rapid analytical instruments can be used. Since many volatile liquids have high solubility of organic substances such as oil and fat, they have a great cleaning effect on the DUT 4 such as a finger. By analyzing the components of this solution, characteristic components are registered in advance by individuals. It is possible to improve the identification accuracy as compared with the component having Further, by determining the presence or absence of a component peculiar to a living body, it can be regarded as a living body determination, and a counterfeit product can be excluded. In the present invention, preferably, the temperature change of the DUT 4 is measured by the optical temperature measuring device 7 shown in FIG. 1 and compared with the temperature change registered in advance to improve the identification accuracy thereof. By comparing with the temperature change peculiar to the living body, it can be determined whether or not it is the living body. The absolute value of the temperature of the DUT is greatly affected by environmental conditions such as climate and room temperature at that time, and it is difficult to obtain important information for identification, but the process of changing from wet to dry by spraying volatile liquid and air is physically If it is evaluated as a temperature change in an environment accompanied by vibration, it is possible to obtain important information for identifying the object to be measured from the form of the temperature change. For example, when the temperature, speed, and flow rate of the air to be jetted, and the temperature of the transparent solid contacting the object to be measured are constant, the heat removal effect due to the heat of vaporization of the volatile liquid and the heat generation effect due to physical vibration are contradictory. The effect occurs in the surface layer of the object to be measured, and the characteristic of the object to be measured appears in the temperature change.
【0011】(4)照明光を空気よりも屈折率の高い透
明固体内部へ送ってこの透明固体の被測定物押圧面でそ
の透明固体側へ反射される光の強度分布を受光素子群に
より光学的に検出するように構成する表面おうとつ模様
測定器において、透明固体またはこれに隣接する被測定
物支持体がその被測定物押圧面と被測定物との間隔を変
化する方向に振動する構造とし、そしてこの透明固体の
被測定物押圧面又は被測定物又はその両方に向かって揮
発性液体と空気を噴射する構造とする表面おうとつ模様
測定器の検出部を用いて、被測定物の表面模様の画像を
明暗の2値に分けた画像と、この画像から抽出した複数
の特徴点間で構成する位置関係図とをマスター画像とし
て作成して登録すること、そしてその後に被測定物から
前記と同条件のもとで明暗の2値に分けた画像と、この
画像から抽出した複数の特徴点間で構成する位置関係図
を作成して、両画像の特徴点の位置関係が最も合致する
位置を含めてその画像の一方が他方から位置がずれる方
向に振動させて透過光量の最大値または最小値または両
者の差分を求め、この透過光量値の一以上が所定の値に
達した場合を一致とみなす表面おうとつ模様測定器の活
用方法である。
(4) Illumination light is sent to the inside of a transparent solid having a refractive index higher than that of air, and the intensity distribution of the light reflected to the transparent solid side by the object pressing surface of the transparent solid is optically analyzed by the light receiving element group. In a surface dimple pattern measuring device configured to detect automatically, a structure in which a transparent solid or an object support adjacent to the transparent object vibrates in a direction in which the distance between the object pressing surface and the object changes And the surface of the transparent solid pattern measuring device having a structure in which a volatile liquid and air are jetted toward the object-pressing surface of the transparent solid or the object-to-be-measured or both, and the object-to-be-measured is measured. Create and register as a master image an image obtained by dividing the image of the surface pattern into two values, light and dark, and a positional relationship diagram composed of a plurality of feature points extracted from this image, and then from the measured object. Under the same conditions as above Create a positional relationship diagram composed of the image divided into light and dark binary values and a plurality of feature points extracted from this image, and include that position including the position where the positional relationship of the feature points of both images best matches. One is oscillated in a direction displaced from the other to obtain the maximum or minimum value of the transmitted light amount or the difference between the two, and the case where one or more of the transmitted light amount values reaches a predetermined value is regarded as coincident. This is how to use the pattern measuring device.
【0012】例えば前述の技術に続いて、被測定物の表
面模様の画像を明暗の2値に分けた画像と、この画像か
ら抽出した複数の特徴点間で構成する位置関係図とをマ
スター画像として作成して登録する。特徴点は例えば指
紋の場合には隆起線の交差点や終点または断点や渦紋の
中心や皺や傷あとなど他と異なる点を選ぶ。そして例え
ば隣接する3特徴点間で三角形等の単純図形を描きマス
ター画像上に描いて保管する。その後に同定すべき被測
定物から前記と同条件のもとで明暗の2値に分けた画像
と、この画像から抽出した複数の特徴点間で構成する位
置関係図をマスター画像と同様に作成する。そして単純
図形、例えば特徴点を結んだ三角形、の中から両画像の
合同の単純図形を選んで重ね合わせ、特徴点の位置関係
が最も近づく位置を振動範囲に含めて両画像の位置がず
れる方向に振動させて、例えば図5に示すような透過光
量の最大値Lまたは最小値Sまたは両者の差分(L−
S)を求める。この透過光量値の一以上があらかじめ定
めた値に達した場合を一致とみなす。ここで透過光量は
計算値を用いることができる。こうすることによって特
徴点の位置関係のみならず、生地の微細なおうとつの一
致度を物理的性質を含めて短時間に精度良く評価できる
ようになる。
For example, following the above-mentioned technique, an image obtained by dividing the image of the surface pattern of the object to be measured into two values, light and dark, and a positional relationship diagram composed of a plurality of characteristic points extracted from this image are master images. Create and register as. In the case of a fingerprint, for example, in the case of a fingerprint, different points such as intersections, end points or break points of ridges, centers of swirl patterns, wrinkles and scratches are selected. Then, for example, a simple figure such as a triangle is drawn between three adjacent feature points and drawn on the master image and stored. Similar to the master image, create an image of the measured object to be identified after that, which is divided into light and dark binary under the same conditions as above, and a positional relationship diagram composed of multiple feature points extracted from this image. To do. Then, select a congruent simple figure of both images from a simple figure, for example, a triangle connecting the characteristic points, and superimpose it, and the position where the positional relationship of the characteristic points is closest is included in the vibration range And the maximum value L or the minimum value S of the transmitted light amount as shown in FIG. 5 or the difference (L−
S) is calculated. The case where one or more of the transmitted light amount values reaches a predetermined value is regarded as coincidence. Here, a calculated value can be used as the transmitted light amount. By doing so, not only the positional relationship of the feature points, but also the degree of coincidence between the fine dough of the cloth and the physical properties can be accurately evaluated in a short time.
【0013】本発明は指紋のほか芸術品や工業製品等の
同定に用いることができ、あらかじめ情報を登録した磁
気カードや写真やコンピュータデータと組み合わせれば
同定の精度は向上する。また被測定物が長期間にわたっ
て繰り返し同定される場合には、例えば測定データを用
いて学習し、経時変化に追従する被測定物の実態に応じ
た判定基準情報を与えることができる。また精度の高い
履歴を残すことや将来の特性変化の予測も可能になり、
ひいては時間とともに変化する被測定物の実態に即応し
た精度の高い同定を可能にできる。
The present invention can be used for identifying art objects, industrial products, etc. in addition to fingerprints, and the accuracy of identification can be improved by combining with magnetic cards, photographs and computer data in which information is registered in advance. When the object to be measured is repeatedly identified over a long period of time, it is possible to learn by using, for example, measurement data, and to provide judgment reference information according to the actual condition of the object to be measured, which follows changes with time. In addition, it becomes possible to leave a highly accurate history and predict future characteristic changes,
As a result, it is possible to perform highly accurate identification that immediately corresponds to the actual condition of the measured object that changes with time.
【0014】[0014]
【発明の効果】本発明により指紋や物体等の表面おうと
つ模様の検出を容易にし、広い範囲にわたって画像を鮮
明にし、同定精度を向上する表面おうとつ模様測定器の
検出部及びその活用方法を提供することが可能になる。
According to the present invention, it is possible to provide a detection unit of a surface-dwelling-pattern measuring device and a method of utilizing the same, which facilitates detection of a surface-dwelling pattern of a fingerprint, an object, etc., makes an image clear over a wide range, and improves identification accuracy. It will be possible to provide.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の構成概念説明図であり、透明固体を振
動させる場合である。
FIG. 1 is an explanatory view of a configuration concept of the present invention, in which a transparent solid is vibrated.
【図2】本発明の構成概念説明図であり、被測定物を振
動させる場合である。
FIG. 2 is an explanatory diagram of a configuration concept of the present invention, which is a case where a measured object is vibrated.
【図3】本発明における押圧力の変化説明図である。FIG. 3 is an explanatory diagram of changes in pressing force according to the present invention.
【図4】本発明における濡れ面積の変化説明図である。FIG. 4 is an explanatory diagram of changes in wetted area in the present invention.
【図5】本発明における透過光量の変化説明図である。FIG. 5 is an explanatory diagram of changes in the amount of transmitted light in the present invention.
【符号の説明】[Explanation of symbols]
1 透明固体内部 2 透明固体の被測定物押圧面 3 受光素子群 4 被測定物 5 噴射ノズル部 6 振動装置 7 光学的温度測定装置 8 光源 A 照射光の入射角、反射角 L 透過光量の最大値 S 透過光量の最小値 1 Transparent Solid Inside 2 Transparent Solid Pressing Surface of Object to be Measured 3 Light-Receiving Element Group 4 Object to be Measured 5 Jet Nozzle Unit 6 Vibration Device 7 Optical Temperature Measuring Device 8 Light Source A Incident and Reflection Angle of Irradiated Light L Maximum Transmitted Light Amount Value S Minimum amount of transmitted light
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 G06T 7/00 // G01B 11/24 C ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location G06T 7/00 // G01B 11/24 C

Claims (4)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 照明光を空気よりも屈折率の高い透明固
    体内部へ送ってこの透明固体の被測定物押圧面でその透
    明固体側へ反射される光の強度分布を受光素子群により
    光学的に検出するように構成する表面おうとつ模様測定
    器において、透明固体またはこれに隣接する被測定物支
    持体がその被測定物押圧面と被測定物との間隔を変化す
    る方向に振動する構造とすること、そしてこの透明固体
    の被測定物押圧面又は被測定物又はその両方に向かって
    揮発性液体と空気を噴射する構造とすることを特徴とす
    る表面おうとつ模様測定器の検出部。
    1. An intensity distribution of light reflected by the illumination light is sent to the inside of a transparent solid having a higher refractive index than that of the air by the object pressing surface of the transparent solid by the light receiving element group. In the surface dimple pattern measuring device configured to detect, the transparent solid or the object support adjacent to this is a structure that vibrates in a direction in which the distance between the object pressing surface and the object is changed. And a structure for injecting a volatile liquid and air toward the object pressing surface of the transparent solid or the object to be measured, or both of them.
  2. 【請求項2】 照明光を空気よりも屈折率の高い透明固
    体内部へ送ってこの透明固体の被測定物押圧面でその透
    明固体側へ反射される光の強度分布を受光素子群により
    光学的に検出するように構成する表面おうとつ模様測定
    器において、透明固体またはこれに隣接する被測定物支
    持体がその被測定物押圧面と被測定物との間隔を変化す
    る方向に振動する構造とし、そしてこの透明固体の被測
    定物押圧面又は被測定物又はその両方に向かって揮発性
    液体と空気を噴射する構造とする表面おうとつ模様測定
    器の検出部を用いて、被測定物の同一位置の表面おうと
    つ模様の時間変化の影響を示す一連の画像を作成して、
    これらの画像を比較解析合成して必要情報を抽出するこ
    とを特徴とする表面おうとつ模様測定器の活用方法。
    2. The intensity distribution of the light reflected by the illumination light is sent to the inside of the transparent solid having a higher refractive index than that of the air by the surface of the transparent solid to be pressed by the light receiving element group. In the surface dimple pattern measuring device configured to detect, the transparent solid or the object support adjacent to this is a structure that vibrates in the direction in which the distance between the object pressing surface and the object is changed. , And the surface of the transparent solid having a structure for injecting a volatile liquid and air toward the pressing surface of the measured object or the measured object or both, and Create a series of images showing the effect of the time-dependent change of the surface surface pattern
    A method for utilizing a surface dent pattern measuring device, which is characterized by comparing, analyzing, and synthesizing these images to extract necessary information.
  3. 【請求項3】 照明光を空気よりも屈折率の高い透明固
    体内部へ送ってこの透明固体の被測定物押圧面でその透
    明固体側へ反射される光の強度分布を受光素子群により
    光学的に検出するように構成する表面おうとつ模様測定
    器において、透明固体またはこれに隣接する被測定物支
    持体がその被測定物押圧面と被測定物との間隔を変化す
    る方向に振動する構造とし、そしてこの透明固体の被測
    定物押圧面又は被測定物又はその両方に向かって揮発性
    液体と空気を噴射する構造とする表面おうとつ模様測定
    器の検出部を用いて、被測定物の同一位置の表面おうと
    つ模様の時間変化の影響を示す一連の画像を作成して、
    これらの画像を比較解析合成して必要情報を抽出するこ
    と、そして被測定物に噴射した揮発性液体又はその気体
    を含む流体を成分分析してあらかじめ登録された情報と
    比較して一致を判定することを特徴とする表面おうとつ
    模様測定器の活用方法。
    3. The intensity distribution of the light reflected by the illumination light is sent to the inside of the transparent solid having a higher refractive index than that of the air by the object pressing surface of the transparent solid by the light receiving element group. In the surface dimple pattern measuring device configured to detect, the transparent solid or the object support adjacent to this is a structure that vibrates in the direction in which the distance between the object pressing surface and the object is changed. , And the surface of the transparent solid having a structure for injecting a volatile liquid and air toward the pressing surface of the measured object or the measured object or both, and Create a series of images showing the effect of the time-dependent change of the surface surface pattern
    These images are compared, analyzed and synthesized to extract the necessary information, and the fluid containing the volatile liquid or its gas sprayed on the object to be measured is subjected to component analysis and compared with the information registered in advance to determine a match. A method of utilizing the surface diaper pattern measuring device characterized in that
  4. 【請求項4】 照明光を空気よりも屈折率の高い透明固
    体内部へ送ってこの透明固体の被測定物押圧面でその透
    明固体側へ反射される光の強度分布を受光素子群により
    光学的に検出するように構成する表面おうとつ模様測定
    器において、透明固体またはこれに隣接する被測定物支
    持体がその被測定物押圧面と被測定物との間隔を変化す
    る方向に振動する構造とし、そしてこの透明固体の被測
    定物押圧面又は被測定物又はその両方に向かって揮発性
    液体と空気を噴射する構造とする表面おうとつ模様測定
    器の検出部を用いて、被測定物の表面模様の画像を明暗
    の2値に分けた画像と、この画像から抽出した複数の特
    徴点間で構成する位置関係図とをマスター画像として作
    成して登録すること、そしてその後に被測定物から前記
    と同条件のもとで明暗の2値に分けた画像と、この画像
    から抽出した複数の特徴点間で構成する位置関係図を作
    成して、両画像の特徴点の位置関係が最も近づく位置を
    含めてその画像の一方が他方から位置がずれる方向に振
    動させて透過光量の最大値または最小値または両者の差
    分を求め、この透過光量値の一以上が所定の値に達した
    場合を一致とみなす表面おうとつ模様測定器の活用方
    法。
    4. An illumination light is sent to the inside of a transparent solid having a refractive index higher than that of air, and the intensity distribution of the light reflected to the side of the transparent solid by the object pressing surface of the transparent solid is optically detected by a light receiving element group. In the surface dimple pattern measuring device configured to detect, the transparent solid or the object support adjacent to this is a structure that vibrates in the direction in which the distance between the object pressing surface and the object is changed. , And the surface of the transparent solid having a structure for injecting a volatile liquid and air toward the measurement object pressing surface or the measurement object or both, and the surface of the measurement object An image in which a pattern image is divided into two values, bright and dark, and a positional relationship diagram formed between a plurality of feature points extracted from this image are created and registered as a master image, and thereafter, the above-mentioned image is measured from an object to be measured. Under the same conditions as One of the images is created by including an image divided into two values of darkness and a positional relationship diagram composed of a plurality of feature points extracted from this image, including the position where the positional relationship of the feature points of both images is closest. Is oscillated in a direction displaced from the other to obtain the maximum or minimum value of the transmitted light amount or the difference between the two, and if one or more of the transmitted light amount values reaches a predetermined value, it is regarded as a coincidence. How to use the vessel.
JP3297194A 1994-02-06 1994-02-06 Detection part for surface rugged pattern measurer and its utilizing method Pending JPH07220054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3297194A JPH07220054A (en) 1994-02-06 1994-02-06 Detection part for surface rugged pattern measurer and its utilizing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3297194A JPH07220054A (en) 1994-02-06 1994-02-06 Detection part for surface rugged pattern measurer and its utilizing method

Publications (1)

Publication Number Publication Date
JPH07220054A true JPH07220054A (en) 1995-08-18

Family

ID=12373791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3297194A Pending JPH07220054A (en) 1994-02-06 1994-02-06 Detection part for surface rugged pattern measurer and its utilizing method

Country Status (1)

Country Link
JP (1) JPH07220054A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1019764A (en) * 1996-07-03 1998-01-23 Autom Syst Res:Kk Concentration measuring apparatus
JP2002049913A (en) * 2000-08-02 2002-02-15 Nec Corp Device and method for authenticating fingerprint
JP2006512153A (en) * 2002-12-26 2006-04-13 モトローラ・インコーポレイテッド Method and apparatus for unevenness detection
JP2017187481A (en) * 2016-03-30 2017-10-12 ニッタ株式会社 Device and method for contact surface observation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1019764A (en) * 1996-07-03 1998-01-23 Autom Syst Res:Kk Concentration measuring apparatus
JP2002049913A (en) * 2000-08-02 2002-02-15 Nec Corp Device and method for authenticating fingerprint
JP2006512153A (en) * 2002-12-26 2006-04-13 モトローラ・インコーポレイテッド Method and apparatus for unevenness detection
JP2017187481A (en) * 2016-03-30 2017-10-12 ニッタ株式会社 Device and method for contact surface observation

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