EP1358468A1 - Procede et dispositif de controle de la qualite de coloration et/ou de brillant de tissus ou de materiaux analogues - Google Patents

Procede et dispositif de controle de la qualite de coloration et/ou de brillant de tissus ou de materiaux analogues

Info

Publication number
EP1358468A1
EP1358468A1 EP02708298A EP02708298A EP1358468A1 EP 1358468 A1 EP1358468 A1 EP 1358468A1 EP 02708298 A EP02708298 A EP 02708298A EP 02708298 A EP02708298 A EP 02708298A EP 1358468 A1 EP1358468 A1 EP 1358468A1
Authority
EP
European Patent Office
Prior art keywords
color
template
image
values
spectral
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.)
Withdrawn
Application number
EP02708298A
Other languages
German (de)
English (en)
Inventor
Patrick Herzog
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.)
Color Aix Perts GmbH
Original Assignee
Color Aix Perts GmbH
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 Color Aix Perts GmbH filed Critical Color Aix Perts GmbH
Publication of EP1358468A1 publication Critical patent/EP1358468A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/462—Computing operations in or between colour spaces; Colour management systems
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters
    • 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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction
    • 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
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • 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
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J2003/466—Coded colour; Recognition of predetermined colour; Determining proximity to predetermined colour

Definitions

  • the invention relates to a method and a device for testing the color and / or gloss quality of fabrics and similar materials
  • the invention is therefore initially based on the object of providing a method for carrying out color tests on templates which, while avoiding the abovementioned disadvantages, provides reproducible measurement results which are similar to those of a visual color test, but at least come so close to them that their deviations are objectified, test results that are actually visually determined lie within the permissible tolerance limits for these.
  • the invention is based on the knowledge that the differences that arise in the known color measurement methods or the known color measurement devices from the result of a visual assessment are based on a plurality of facts that are to be seen therein first are that the color distance formulas used here do not represent human color vision with sufficient accuracy, so that there are different tolerance thresholds which depend, for example, on the position in the color space and also on the direction of the color deviation. Since these different tolerance thresholds also differ from substance type to substance type and are also not known, they would have to be determined experimentally for each substance type. Since this is practically impossible, the difference between the achievable measurement result and the visual observation cannot be eliminated.
  • Color measuring devices always follow one of the standard geometries due to their structure, while a person is not able to view the templates under an exact standard geometry throughout their entire daily working hours. While color measuring devices therefore always provide an objective measurement result, the result of the visual observation is always dependent on the current viewing conditions and thus subjectively influenced or subjectively influenceable.
  • UV light ultraviolet light
  • Daylight simulator tubes usually emit a considerable amount of UV Light off. This leads to substances with optical brighteners
  • Substances are used that look different in visual observation than when measured.
  • Color measuring devices work either with directional or with diffuse
  • both the fluorescent tubes used in the visual inspection and the daylight simulators emit both directed light and a significant proportion of diffuse
  • a white image original with a known spectral reflection factor is placed on an object table and illuminated by means of a light source whose spectral properties are known;
  • a digital image recorder preferably a multispectral image recording system with a plurality of spectral filters that can be introduced into the optical beam path, or by means of an electronically tunable filter, the white image original is recorded and digitized;
  • Each channel of the white image recording is opened when the Shutter of the image sensor made a black picture;
  • the template to be measured is placed and illuminated by the light source;
  • the template is recorded and digitized by means of the digital image sensor;
  • the values of the white image original and the black images are included in the digital values of the original in order to eliminate inhomogeneities and the spectral properties of the light source and to produce a corrected image;
  • the areas to be evaluated are determined using the digital image of the template
  • the reconstruction of the reflection spectra of the respective areas of the digitized and corrected image is carried out using a suitable method, which is based on the known spectral properties of the image recorder, the spectral filter, the white image original and the illumination;
  • the reflection spectra are multiplied separately for each area by the spectral radiation distribution of one or more types of light and by the spectral sensitivities of a human viewer (e.g. normal spectral value curves) and integrated over the visible area of the spectrum;
  • the color values XYZ obtained in this way are transformed into a suitable color space adapted to human color perception, such as CIELAB, L.
  • the CIELAB color values are compared with the CIELAB color values of a reference template determined according to the same method and according to a color distance formula adapted to human color perception, e.g. B. DELTA-E, CIE94, CMC or CIE2000, optionally broken down according to the components contributing to the color difference, such as brightness, chroma, hue, mathematically evaluated;
  • the color difference for one or more types of light or its subcomponents is / are compared with a predetermined tolerance threshold, which may differ for the subcomponents, exceeding the tolerance threshold leading to the output of an error message.
  • the measuring system according to the invention is an image processing system
  • colored patterned substances can also be checked, in which the respective color-related image areas are separated and measured separately by suitable image processing algorithms and compared with the reference template.
  • An apparatus for carrying out the method according to the invention has a multispectral image recording system for recording and digitizing both the white image original and the original as well as a data processing device with a memory in which comparative values of a reference template can be called up, the data processing device in turn having means for: a) the values the white picture original and the black pictures in the include digital values of the template in order to eliminate inhomogeneities and the spectral properties of the light source in order to generate a corrected image of the template; b) use the digital image of the template to determine those areas that are to be evaluated; c) averaging all digital values of the corrected image separately for each area and channel; d) to carry out the reconstruction of the reflection spectra of the respective areas of the digitized and corrected image using a suitable method based on the known spectral properties of the image recorder, the spectral filter, the white image original and the illumination, from the averaged values of all channels; e) multiply the reflection spectra separately for each area with the spectral radiation distribution of one or
  • the device for carrying out the method according to the invention has a multispectral image recording system in the form of a digital image sensor of a multispectral scanner, which is provided with several light sources for illuminating an object table, which serves to record both the white image template and the template to be measured. Both the white image template and the template to be measured are preferably recorded on this in a horizontal position, but it is of course possible to change the recording position as desired.
  • a digital camera is arranged above the object table and is assigned a device for modifying the spectral properties of the entire system. This device can be, for example, a mechanical filter changer that brings the spectral filters of the image recorder into its beam path in a predeterminable order; but it can also be an electronically tunable optical filter.
  • light sources in addition to halogen lamps, especially fluorescent tubes.
  • Light sources with different proportions of directed and diffuse light can also be used.
  • Xenon lamps designed as static or flash lamps can also be used as the light source.
  • the spectral properties of the light source used for recording / measurement are eliminated by channel-wise white balance.
  • a white image template with a known spectral reflection factor that is as homogeneous as possible, as good as possible and diffusely reflecting is recorded once or at certain intervals and used to correct the individual channels.
  • the position of both the light sources, the template to be measured and the camera can be varied.
  • the respective position can be fixed for a series of measurements, or change in parts during a measurement, so that all the more information about the template to be measured, in particular its gloss behavior, is obtained.
  • Area sensors with, for example, 2000 x 3000 pixels can be used as digital image recorders, as can line sensors that are mechanically adjusted in order to "scan" the entire original to be measured. NEN ".
  • Multispectral scanners take color-free image acquisition.
  • the software can be designed in such a way that a certain area of the image is only evaluated automatically or with the help of a user after the multispectral image has been recorded and displayed on the screen, or a previously set area is recorded within the entire recording area during the recording. Since a large number of pixels and thus spectral individual measurements are available, averaging can be carried out over the respective selected area, which serves to reduce the noise, but also for averaging over a sufficiently large area of the structured template to be measured. By modifying the optics, it is also possible to adapt to roughly patterned templates.
  • the spectra are reconstructed using software, using one of various scientifically published methods, with only possible details having to be adapted to the specific circumstances.
  • the geometry of lighting - template - measurement / camera is adjusted to the geometry of lighting - template - eye used for visual inspection.
  • a standard geometry e.g. 45/0 or d / 89
  • a standard geometry is just as little used as any other circular or purely diffuse symmetry of the measurement.
  • the template can be rotated about a vertical or horizontal axis and then measured again, or the position of the light source can be changed between the measurements, or several light sources arranged at different locations can be switched on one after the other and used for the measurement, or the position of the image sensor can be changed between the measurements, or several image sensors can be used.
  • the light used for viewing can be included in the mathematical color distance calculation.
  • either the UV light of the light source is filtered out, or the same light source is used for measurement as for the visual inspection.
  • the light source used for the measurement contains directed and diffuse components as in the visual control; this is achieved by using the same light source as in the visual inspection or by a device that partially diffuses directed light.
  • the multispectral recording system is designed for the simultaneous processing of many (e.g. 2000 x 3000) measuring points, averaging can also take place over quite large areas, so that even patterned samples can be measured reproducibly.
  • the method according to the invention can be integrated "online" into the production process both in the manufacturing process of fabrics or similar materials and in the production of garments. In this way it is achieved, for example, in the manufacture of the substances that color defects can be detected even during production, so that it is not necessary to produce a certain quantity of defective substances before color defects are detected.
  • 1 shows a front view of the device for the continuous or area-wise checking of a fabric web. during their manufacture; 2 shows a diagrammatic representation of an integrated multispectral scanner;
  • a digital image sensor in the form of a multispectral scanner 3 of a multispectral image recording system is arranged downstream of the outlet point of a fabric web 1 from a production system 2.
  • the multispectral scanner 3 has a plurality, for example 16, spectral filters, not shown, which can be introduced into its beam path in a predeterminable order.
  • the white image template (not shown in detail) can be placed on the fabric web 1, which also serves as an object table and is guided over a dancer roller arrangement 4. At its outlet end, the fabric web 1 is guided over a deflection roller, which is not described in more detail, and is paneled on a fabric carriage 6 by means of a rocker 5.
  • the multispectral scanner 3 is assigned a plurality of light sources 7, which serve in its recording area both for illuminating the white image original and the fabric web 1.
  • the multispectral scanner 3 is connected via a data line 8 to the computer 9 of a data processing device 10, so that the digitized and possibly transformed values of the recordings of both the white image original and the material web 1 can be fed to the computer 9 and compared with the corresponding data of a reference original.
  • the result of the comparison and, if appropriate, also the data of relevant intermediate results can then be displayed on the screen 11 of the data processing device 10 and the corresponding data can be reproducibly stored in its memory.
  • the corresponding data can be printed out as a measurement protocol using a printer 12.
  • both the data of the result and the relevant interim results are stored so that they can be retrieved, they can be forwarded to the remote colorimetrically calibrated viewing stations either via online or on-demand via appropriate data transmission lines, so that they can be viewed there at the same time or later to also visually evaluate the fabric produced and, if necessary, to compare it with a reference template also displayed on a screen.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (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)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour sa mise en oeuvre, en vue d'effectuer des essais de coloration sur des modèles, procédé selon lequel, en utilisant un système de traitement d'images au moyen d'algorithmes appropriés de traitement d'images, des domaines d'images correspondants au point de vue coloration sont séparés les uns des autres et comparés avec des modèles de références, ce qui permet d'obtenir des résultats de mesure reproductibles égalant ceux d'un contrôle de coloration visuel, et au moins si proches de ceux-ci que leurs écarts par rapport à des résultats d'essai déterminés visuellement et objectivés tombent dans des limites de tolérance admissibles.
EP02708298A 2001-01-21 2002-01-17 Procede et dispositif de controle de la qualite de coloration et/ou de brillant de tissus ou de materiaux analogues Withdrawn EP1358468A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10102612 2001-01-21
DE10102612A DE10102612A1 (de) 2001-01-21 2001-01-21 Verfahren und Vorrichtung zur Prüfung der Farb-und/oder Glanz-Qualität von Stoffen oder ähnlichen Materialien
PCT/EP2002/000443 WO2002057752A1 (fr) 2001-01-21 2002-01-17 Procede et dispositif de controle de la qualite de coloration et/ou de brillant de tissus et de materiaux analogues

Publications (1)

Publication Number Publication Date
EP1358468A1 true EP1358468A1 (fr) 2003-11-05

Family

ID=7671264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708298A Withdrawn EP1358468A1 (fr) 2001-01-21 2002-01-17 Procede et dispositif de controle de la qualite de coloration et/ou de brillant de tissus ou de materiaux analogues

Country Status (4)

Country Link
EP (1) EP1358468A1 (fr)
AU (1) AU2002242681A1 (fr)
DE (1) DE10102612A1 (fr)
WO (1) WO2002057752A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE10121984B4 (de) * 2001-04-27 2012-09-13 Color Aixperts Gmbh Verfahren und Vorrichtung zur visuell optimierten Darstellung von Farbbildern auf Bildschirmen und/oder deren Vergleich mit Originalen oder gedruckten Bildern
ES2204282B1 (es) * 2002-04-24 2005-07-16 Universidad Publica De Navarra Elaboracion y uso de patrones para la evaluacion visual de alimentos.
WO2005012858A1 (fr) * 2003-08-01 2005-02-10 Tubitak Uekae Dispositif de mesure de couleur et de differences de couleur, et procede associe mis en oeuvre au moyen de ce dispositif
DE102006038615A1 (de) * 2006-08-17 2008-02-21 Massen Machine Vision Systems Gmbh Überwachung der Qualität von gemusterten, insbesondere räumlich gekrümmten Oberflächen
DE112008003190B4 (de) 2007-11-23 2023-02-16 Volkswagen Ag Verfahren und Vorrichtung zur Qualitätskontrolle einer Oberfläche
DE102008033064B4 (de) * 2008-07-15 2013-04-25 Eva Lübbe Verfahren zur Messung des Farbabstandes
CN101799328B (zh) 2009-02-10 2011-11-09 致茂电子股份有限公司 建构光源测量对照表的方法、光源测量方法及系统
CN106004021A (zh) * 2016-06-06 2016-10-12 淮南市鸿裕工业产品设计有限公司 坯布印花机的色系筛选装置
CN106757639B (zh) * 2016-12-14 2018-11-02 盐城工学院 一种具备染色功能的整经机及整经方法
IT201700042506A1 (it) * 2017-04-18 2018-10-18 Btsr Int Spa Metodo, sistema e sensore per rilevare una caratteristica di un filo tessile o metallico alimentato ad una macchina operatrice
EP3666968A3 (fr) * 2018-12-11 2020-07-08 TEXMA S.r.l. Procédé et appareil de fabrication d'un échantillon de tissu conçu pour contrôler l'uniformité des couleurs et d'autres caractéristiques techniques
CN110672209A (zh) * 2019-10-24 2020-01-10 福建屹立智能化科技有限公司 一种经编布匹色差在线检测方法
CN111272673A (zh) * 2020-03-23 2020-06-12 泸州麦穗智能科技有限公司 非纯色布匹色差检测系统及检测方法
CN117073842B (zh) * 2023-07-21 2024-03-29 武汉纺织大学 基于纹理特征加权校正的纺织面料照相测色方法和系统

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US5850472A (en) * 1995-09-22 1998-12-15 Color And Appearance Technology, Inc. Colorimetric imaging system for measuring color and appearance
KR100748844B1 (ko) * 1999-10-05 2007-08-13 아크조 노벨 엔.브이. 전자 촬상 장치에 의한 색 매칭 방법
WO2001028224A2 (fr) * 1999-10-13 2001-04-19 Cambridge Research & Instrumentation Inc. Systeme d'imagerie colorimetrique

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Also Published As

Publication number Publication date
WO2002057752A8 (fr) 2002-09-26
WO2002057752A1 (fr) 2002-07-25
AU2002242681A1 (en) 2002-07-30
DE10102612A1 (de) 2003-05-15

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