WO2017204591A1 - Dispositif et procédé d'inspection d'étiquette - Google Patents

Dispositif et procédé d'inspection d'étiquette Download PDF

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Publication number
WO2017204591A1
WO2017204591A1 PCT/KR2017/005510 KR2017005510W WO2017204591A1 WO 2017204591 A1 WO2017204591 A1 WO 2017204591A1 KR 2017005510 W KR2017005510 W KR 2017005510W WO 2017204591 A1 WO2017204591 A1 WO 2017204591A1
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WO
WIPO (PCT)
Prior art keywords
light
label
image
absorbing plate
illumination
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.)
Ceased
Application number
PCT/KR2017/005510
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English (en)
Korean (ko)
Inventor
이은석
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.)
Individual
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Individual
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 Individual filed Critical Individual
Priority to CN201780032041.0A priority Critical patent/CN109196334A/zh
Publication of WO2017204591A1 publication Critical patent/WO2017204591A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N2021/1765—Method using an image detector and processing of image signal
    • G01N2021/177—Detector of the video camera type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G01N2021/8812—Diffuse illumination, e.g. "sky"
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G01N2021/8812—Diffuse illumination, e.g. "sky"
    • G01N2021/8816—Diffuse illumination, e.g. "sky" by using multiple sources, e.g. LEDs

Definitions

  • a label inspection apparatus for extracting a label printed on the surface of the object as an image and a label inspection method using the same.
  • Computer vision or machine vision is based on the scattering optics of illumination optics. This can be designed and interpreted as Lambert's Law.
  • the surface of an object that satisfies Lambert's law is called the Lambertian Surface, and it is a reflector having a uniform luminous flux in all directions, and means a completely diffused surface having a constant surface regardless of the viewing angle of reflected light. Lambertian surfaces are predictable and analysable.
  • specular reflection surface that reflects all the light incident on one surface so that the surface is invisible so that information on the surface where the light hits cannot be read.
  • specular reflection surface is not suitable for non-contact visual inspection because it cannot get information of reflected light.
  • inspection and measurement methods for specular reflection surfaces include the measurement of nanoscale microregions using ellipsometry and the microscopic or submicroscale microregions using phase shifting. have.
  • the present invention provides a label inspection apparatus for extracting and inspecting labels, such as patterns and characters, printed on a high glossy / specific surface of an object having a curved specular reflection surface, and a label inspection method using the same.
  • the label inspection device is arranged on the side of the object having a specular reflection surface on the lower surface is arranged to emit light, the illumination irradiates the light to the top.
  • the light absorbing plate is provided on the upper portion of the light to absorb light emitted from the light.
  • the reflector is provided under the object, and light that is not absorbed by the light absorbing plate travels along the side surface of the object to reach the reflector, and the light is reflected from the inner surface of the reflector to be projected onto the lower surface of the object.
  • the light reaching the lower surface of the object is reflected and received by the light receiving lens provided under the reflection shade, and the image received by the light receiving lens is detected by the image sensor provided under the light receiving lens.
  • the label inspection device is characterized by including a lighting controller for adjusting the optimum illumination brightness. And it is characterized in that it further comprises an information processing unit for controlling the operation of the lighting controller, receiving the image detected by the image sensor and inspecting the label printed on the object to detect defects and information.
  • the light absorbing plate is characterized in that it is composed of one or more of the plate to be absorbed by the melting or matte black paint of the fabric is painted.
  • the reflector is characterized in that the inner surface is made of a matte white material, such as white acetal, or a workpiece made of a matte white paint so that the diffused reflection of light is well achieved.
  • a matte white material such as white acetal
  • a workpiece made of a matte white paint so that the diffused reflection of light is well achieved.
  • the specular reflection information by removing the specular reflection information from the object, it is possible to secure high quality image information to increase the recognition efficiency of a label such as a character printed on a curved surface and to effectively detect printing defects of the label. .
  • FIG. 1 is a block diagram of a label inspection apparatus according to an embodiment of the present disclosure.
  • FIG. 2 is a flowchart illustrating a method of inspecting printed matter according to an embodiment of the present disclosure.
  • 3 is a conceptual diagram representing that the angle of reflection varies according to the surface to which light is irradiated.
  • FIG. 4 is a conceptual diagram modeling the bottom shape of a typical plastic injection molding.
  • 5 is a typical image in which specular reflections are photographed.
  • FIG. 6 is an image from which the specular reflection ray photographed using the label inspection apparatus according to an exemplary embodiment of the present disclosure is removed.
  • An embodiment of the present disclosure is to extract an image for inspecting a label such as a pattern or a character printed on a surface of a concave high-gloss material in which diffuse reflection or specular reflection may occur, and light scattered using a reflection shade
  • the present invention relates to a label inspection apparatus and method for illuminating a surface of an object and effectively blocking specular light incident from a curved surface.
  • FIG. 1 is a block diagram of an apparatus for inspecting a label according to an exemplary embodiment of the disclosure.
  • Label inspection apparatus 1 includes an illumination 20, a light absorbing plate 30, a reflection shade 40, a light receiving lens 50, the image sensor 60.
  • the object 10 is a specimen in which a label to be inspected is printed by a label inspection apparatus according to the disclosed contents.
  • the lower part of the object 10 has a curved specular reflection surface, and a label containing information such as letters and patterns is printed on the lower surface of the object 10 having the specular reflection surface.
  • information such as a serial number and a manufacturing date must be managed.
  • a technology of recognizing an image printed on the object 10 and processing an image to extract a label containing such information is required. Do.
  • the illumination 20 is an element that provides a light source around the object 10 to inspect a label printed on the object 10.
  • the vertical portion of the illumination 20 is provided with a light absorbing plate 30 for suppressing the absorption and reflection of light.
  • the light absorbing plate 30 may be composed of a plate having a surface made of a melted or matte black workpiece of the fabric, and suppresses the incident light to be reflected again.
  • the light irradiated from the illumination 20 is emitted toward the light absorbing plate placed on the vertical top of the illumination.
  • LEDs may be used as the illumination 20, and the illumination 20 is preferably directed upward only toward the light absorbing plate.
  • the lamp shade 22 is provided at the bottom of the light to prevent the light from being directly emitted to the lower part of the object 10.
  • the lower portion of the object 10 is provided with a reflection shade 40 having an inverted truncated cone shape, the upper portion of which is wider than the lower surface of the object 10 and narrowed toward the lower portion.
  • Light rays starting from the illumination 20 are diffused and diffused toward the light absorbing plate 30, while some light is impinged on the surface of the object 10 to be diffracted and refracted.
  • Such light is incident on the inner surface of the reflector 40 along the surface of the object 10.
  • Some of the light incident on the reflection shade 40 is hit by the inner surface of the reflection shade 40 again to be reflected and projected to the lower portion of the object 10.
  • the reflection shade 40 is made of a matte white material workpiece, such as white acetal, or a matte white paint is made of a workpiece that is well diffused reflection of light.
  • the reflector 40 is illustrated and described in the shape of a truncated cone, the present invention is not limited thereto.
  • the reflector 40 may reach the lower surface of the object above the reflector.
  • the shape is sufficient, it can be modified and applied in various shapes.
  • the upper portion may be disposed outside the object, and may be configured to be separated into a plurality of surfaces inclined at an angle at which incident light may be reflected to the lower surface of the object on the upper side of the reflector. .
  • An image sensor 60 is provided below the reflection shade 40, and a light receiving lens 50 is disposed between the reflection shade 40 and the image sensor 60.
  • Some of the light rays emitted from the illumination 20 hit the object 10 to be diffracted and refracted to enter the reflector 40 along the surface of the object 10, and a part of the light is reflected by the reflector 40 again to reflect the object ( After reaching the lower surface of 10), the light is reflected again and the light receiving lens 50 receives the light and transmits it to the image sensor 60.
  • the image sensor 60 detects the image received by the light receiving lens 50 and transmits the image to the information processor 80.
  • the lighting 20 may be controlled by the light controller 70 on / off and the brightness of the light. Therefore, the brightness of the light emitted from the light 20 may be controlled by controlling the light controller 70 so that the optimal image is detected by the image sensor 60.
  • the lighting controller 70 may be controlled manually or the operation may be controlled by the information processor 80.
  • the information processor 80 controls the operation of the lighting controller 70.
  • the image sensed by the image sensor 60 is received to recognize a label printed on the object 10.
  • white light may be used for the illumination 20 to obtain a clear label image regardless of the color of the object 10.
  • the image sensor 60 may use an image obtained by photographing a color image.
  • the information processor 80 extracts the background color of the object 10, that is, the color information of the object 10, from the captured color image.
  • the label printed in another color contrasted with the background color processes the color image so that the contrast ratio can be compared with the background color.
  • the corrected color image extracts a clearer label image and inspects the printed label.
  • a clear label image may be extracted by removing the specular reflection occurring at the curved lower surface when inspecting a label printed on the curved surface on the lower surface of the object 10.
  • FIG. 2 is a flowchart illustrating a label inspection method using a label inspection apparatus according to an exemplary embodiment of the present disclosure.
  • the object 10 is positioned on the label inspection device.
  • the object 10 has a curved surface on its lower surface, and a label such as a letter is printed thereon.
  • the illumination 20 is arranged on the side of the object 10, and the light absorbing plate 30 is provided on the illumination 20.
  • Illumination 20 may be made of a white light source, the illumination 20 is irradiated toward the light absorbing plate 30 (S10).
  • Some light that is not absorbed by the light absorbing plate 30 is incident to the reflection shade 40 provided below the object 10 along the side surface of the object 10.
  • the light incident on the reflection shade 40 is reflected on the inner surface of the reflection shade 40 and is projected onto the bottom surface of the object 10 (S20).
  • the light projected on the lower surface of the object 10 is reflected again to reach the image sensor 60 by the light receiving lens 50 provided under the reflector 40 to take an image (S30).
  • the image sensor 60 may acquire a color image by the white light illumination 20.
  • the background color of the object 10 is checked by processing the color image photographed by the image sensor 60 (S40).
  • the color image is processed to contrast the background color and the contrast ratio of the label printed in a color different from that of the object 10, that is, the background color.
  • the label may be more clearly extracted, and thus, the label image displayed on the bottom surface of the object 10 is extracted (S50).
  • inspection information may be obtained from the extracted label image to manage and inspect the object.
  • one embodiment disclosed herein is to reflect the scattered light on the surface of the specular reflection using a reflection shade and to generate an image from which the specular reflection is removed to effectively inspect the printed label.
  • Figure 3 is a conceptual diagram representing that the angle of reflection changes depending on the surface to which light is irradiated, and shows the shape of the reflective surface and the movement path of the light.
  • Circular reflectors reflect light uniformly and are condensed, scattered and scattered inside the circle.
  • light is reflected parallel to the geometric axis of the reflecting surface, and the elliptical reflecting surface is uniformly diffusely reflected, so that it is focused, scattered, and scattered outside of the circle.
  • Figure 4 is a conceptual diagram modeling the shape of the bottom surface (lower surface) in a typical plastic injection container or glass bottle. It can be seen that it is made in a concave shape to withstand the pressure in the container, this shape is very similar to the shape of a circular to parabolic or oval. In addition, in the case of a plastic injection molding, the casting hole of the mold is located at the center of the shape, and thus the shape of the double shape is obtained.
  • Disclosed herein is to reflect the scattered light on the printed label using a reflector, to obtain an image from which the specular light is removed to effectively inspect the label printed on the specular surface.
  • FIG. 6 is an image from which the specular reflection ray photographed using the label inspection apparatus according to an exemplary embodiment of the present disclosure is removed. Compared with the image of FIG. 5, it is confirmed that the printed label is white and difficult to be recognized due to the specular reflection on the curved surface, so that the specular reflection is removed to clearly recognize the label.
  • the contents disclosed in the present specification allow the scattered light to strike the surface of the object so as to block the specular reflection incident from the concave curved surface, so that the reflector is not condensed by the surface shape to create an uneven image that appears.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

La présente invention concerne un dispositif d'inspection d'étiquette pour extraire et inspecter une étiquette imprimée sur une surface spéculaire présentant une irrégularité, et un procédé d'inspection d'étiquette utilisant celui-ci. Le dispositif d'inspection d'étiquette comporte un éclairage d'émission de lumière agencé sur un côté d'un objet ayant une surface spéculaire sur une surface inférieure de celui-ci, et l'éclairage émet la lumière vers le haut. Une plaque d'absorption de lumière est disposée au-dessus de l'éclairage et absorbe la lumière émise par l'éclairage. Un réflecteur est disposé sous l'objet, et la lumière, qui n'a pas été absorbée par la plaque d'absorption de lumière, se propage le long d'une surface latérale de l'objet, arrive au niveau du réflecteur, et est réfléchie par la surface interne du réflecteur de façon à être projetée sur la surface inférieure de l'objet. La lumière, qui est arrivée à la surface inférieure de l'objet, est réfléchie par celle-ci et est reçue par une lentille de réception de lumière disposée sous le réflecteur. Une image reçue par la lentille de réception de lumière est détectée par un capteur d'image disposé sous la lentille de réception de lumière.
PCT/KR2017/005510 2016-05-26 2017-05-26 Dispositif et procédé d'inspection d'étiquette Ceased WO2017204591A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780032041.0A CN109196334A (zh) 2016-05-26 2017-05-26 标签检查装置及方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160064839A KR101829366B1 (ko) 2016-05-26 2016-05-26 라벨 검사 장치 및 방법
KR10-2016-0064839 2016-05-26

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WO2017204591A1 true WO2017204591A1 (fr) 2017-11-30

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PCT/KR2017/005510 Ceased WO2017204591A1 (fr) 2016-05-26 2017-05-26 Dispositif et procédé d'inspection d'étiquette

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KR (1) KR101829366B1 (fr)
CN (1) CN109196334A (fr)
WO (1) WO2017204591A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1054807A (ja) * 1996-08-08 1998-02-24 Kirin Techno Syst:Kk 壜の口側面の検査装置
JPH1131225A (ja) * 1997-07-10 1999-02-02 Toshiba Corp ラベル等の検出装置および検出処理装置
JP2003075292A (ja) * 2001-06-14 2003-03-12 Tomey Corp 透明体の検査装置および検査方法
JP2005337894A (ja) * 2004-05-27 2005-12-08 Ishida Co Ltd ラベル検査装置および検査方法
JP2010151473A (ja) * 2008-12-24 2010-07-08 Kirin Techno-System Co Ltd ねじ口壜の検査装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2738300B2 (ja) 1994-06-20 1998-04-08 白柳式撰果機株式会社 塊状青果物のカメラ選別機に用いる間接照明型多面撮影装置
DE102006047150B4 (de) * 2006-10-05 2013-01-17 Krones Aktiengesellschaft Inspektionsvorrichtung für Behältnisse
JP2008281477A (ja) 2007-05-11 2008-11-20 Asahi Soft Drinks Co Ltd ラベル検査方法
JP5608925B2 (ja) * 2013-01-24 2014-10-22 東洋ガラス株式会社 ガラスびんの印刷検査装置
JP2014190868A (ja) * 2013-03-27 2014-10-06 Ccs Inc 光照射装置
US9467609B2 (en) * 2013-05-10 2016-10-11 Mettler-Toledo, LLC Machine vision inspection systems and methods and aperture covers for use therewith
CN105445194B (zh) * 2015-12-28 2018-12-25 天津大学 针对高反射物体的附着规则图案的光源装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1054807A (ja) * 1996-08-08 1998-02-24 Kirin Techno Syst:Kk 壜の口側面の検査装置
JPH1131225A (ja) * 1997-07-10 1999-02-02 Toshiba Corp ラベル等の検出装置および検出処理装置
JP2003075292A (ja) * 2001-06-14 2003-03-12 Tomey Corp 透明体の検査装置および検査方法
JP2005337894A (ja) * 2004-05-27 2005-12-08 Ishida Co Ltd ラベル検査装置および検査方法
JP2010151473A (ja) * 2008-12-24 2010-07-08 Kirin Techno-System Co Ltd ねじ口壜の検査装置

Also Published As

Publication number Publication date
KR20170133707A (ko) 2017-12-06
CN109196334A (zh) 2019-01-11
KR101829366B1 (ko) 2018-02-14

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