EP0741026A2 - Procédé d'inspection d'images et d'alimentation en encre dans des produits imprimés d'une machine d'impression - Google Patents

Procédé d'inspection d'images et d'alimentation en encre dans des produits imprimés d'une machine d'impression Download PDF

Info

Publication number: EP0741026A2
Authority: EP; European Patent Office
Prior art keywords: error; color; type; image data; printing
Prior art date: 1995-05-04
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.): Granted

Application number

EP96105187A

Other languages

German (de)

English (en)

Other versions

EP0741026B1 (fr

EP0741026A3 (fr

Inventor

Wolfgang Geissler

Bernd Kistler

Werner Dr. Huber

Harald Bucher

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.)

Heidelberger Druckmaschinen AG

Original Assignee

Heidelberger Druckmaschinen AG

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.)

1995-05-04

Filing date

1996-04-01

Publication date

1996-11-06

1996-04-01 Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG

1996-11-06 Publication of EP0741026A2 publication Critical patent/EP0741026A2/fr

1998-03-25 Publication of EP0741026A3 publication Critical patent/EP0741026A3/fr

2001-02-21 Application granted granted Critical

2001-02-21 Publication of EP0741026B1 publication Critical patent/EP0741026B1/fr

2016-04-01 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
- B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply

Definitions

the invention relates to a method for image inspection and color guidance on print products of a printing press, the actual image data of the print images of the print products preferably being determined in online operation and compared with target image data for error detection.
a method of the type mentioned at the outset is apparent from US Pat. No. 5,187,376.
the print images of the continuously produced print products are examined for errors in the ongoing production operation by means of an optical detection device. This is done by obtaining actual image data from the print images of the print products and comparing them with target image data.
the target image data originate from an error-free image original, so that an error can be inferred from the comparison mentioned when a deviation occurs between the actual and target data.
a deviation that occurs indicates that there is an error, but it is fundamentally not clear what type of error it is. If various available measures were taken to correct the error without the exact type of error being known, this can lead to problems in the production run.
the invention has for its object to provide a method for image inspection and color guidance on print products of a printing press, in which a purposeful and reliable in terms of the printing process error detection or error correction takes place.
This object is achieved in that if an error occurs before a change in the color guide is checked whether a cause other than the color guide is possible for the deviation due to the type of error. If a deviation of the image data that indicates an error is determined by the target / actual comparison, then a corrective measure is carried out in a targeted manner in such a way that there is a high probability of being excluded before a change in the color guidance, in particular the implementation of a color control can that the determined deviation has a cause other than the color guide. All known printing errors, such as slugs, registers, colors, dampness, stenciling, ions, sliding, duplicating, transfer registers, etc. come into consideration as other causes of error.
the color control tries to compensate for this pressure disturbance by changing the zone opening, the effects cannot be foreseen; they can lead to instability in the control process, but without the elimination of errors.
the color control activated, for example by adjusting the color zone.
a type of fault analysis is carried out, in which different, predetermined criteria are used in succession for fault type detection, preferably systematically. Certain criteria are therefore specified for each type of error, which are used for systematic troubleshooting, so that the type of the present error can be predicted with a high degree of probability. If the type of error has been determined, a corrective action can definitely be taken.
an error correction measure is carried out in accordance with the determined type of error. If there is a high likelihood of a certain error, only the intended, specific measure is taken to remedy the situation.
the type of error is ambiguous, the type of error that has the greatest probability is assumed to be present. So if several of the above-mentioned criteria are met when determining the type of fault, this may result in a clear determination of the type of fault difficult combinations of criteria must be used. Certain combinations of the criteria provide information about the type of error, whereby additional aids such as the probability calculation can be used to achieve the greatest possible accuracy in determining the type of error.
an optical detection device which can be arranged, for example, in the delivery or in the area of the impression cylinder of the last printing unit of the printing press, the continuously freshly printed sheets are detected with regard to the printed images of the printed products, actual image data being determined and being fed to electronics, in particular a computer .
the procedure is to identify defective sheets.
the determined actual image data are compared with target image data.
the target image data are stored in the computer. They represent an ok sheet, i.e. an error-free printed copy.
a deviation is found in the target / actual comparison, it can be determined on the one hand which sheet or which sheet has this deviation and on the other hand the location of the deviation in the printed image can also be traced, i.e. the defective sheets and also the locations of the defects can, for example, be revealed to the printer be shown on a display.
Possible causes of errors can be: slugs, lint, registers, sliding, duplicating, paper type, paper color, lighting, glass fiber defects, distance between sheet and measuring bar of the optical detection device, moisture, no or too little color, paper transport, no paper, dirty optics, stripes, temporary Color changes, for example due to changes in speed, etc.
the invention is based on the fact that certain measures can be uncritical when eliminating errors and others can be very critical for the printing process, so that the critical troubleshooting measures can only be carried out if it is ensured that another type of error is not present. Color management is critical in the printing process, so that color management changes are the last measure to be taken when troubleshooting.
Optics dirty or defective optical path (the optical detection device)
Another possibility is to link the type of error and the measuring location or further variables or auxiliary variables in a matrix (FIG. 2). Once the matrix has been created, the probability of a particular type of error can be determined and in this way the error that has the greatest probability of occurring can be determined.
a temporal component in the error type analysis, for example by capturing the image data or the difference values over several sheets, so that their chronological history flows into the error assessment.
the flow chart shown in FIG. 1 illustrates the procedure for the type of fault analysis. It can be seen that whenever a criterion is met, the next type of error is passed on until finally - as the last measure - a color control measure is taken. It is assumed that the printed images of the printed products are mentally divided into zones according to the zonal division of the inking unit, with mental separations taking place transversely to these zones, so that individual fields arise. Measurement locations of the optically working detection device. If a color field reports a color deviation during production due to a deviation in the mentioned target-actual comparison, then - before the color control is activated - it must be excluded with a high degree of probability that the change in the measured value has a cause other than the color guide.
step 9 the evaluation is carried out, in the event of an error according to step 10, a message is given or, if there are no errors, a transition is made to step 11.
step 9 it is also possible to check whether the measured image data periodically scatter in the time range, for example that every second or third sheet has an error, this can be caused by duplication.
the mean values remain relatively constant, but the color control could be called up due to single value tolerance violations. Since such effects are noticeable in a significant increase in the scatter, for example the last 16 or 64 measured values, such a cause of error can be excluded or identified by checking this scatter.
step 11 the field of a zone is compared with similar fields of the same zone.
Step 14 relates to the comparison of fields of one zone with fields of neighboring zones. Since measurement / control fields are selected for each zone and for each color, the equivalent fields of one or more neighboring zones can be used for checking in the event of an error message in one zone. A color deviation in one zone must be observed in a weakened form in the neighboring zone.
step 23 which activates the color control if there is no error to date, that is to say if no error has been found in the preceding steps (step 24).
the cause of the error is automatically analyzed and output or corrected for a quick rectification of sources of error and to avoid waste.
the knowledge available from the process engineering know-how of the printing process is implemented in search strategies and evaluation algorithms, their sequential application or parallel linkage to allow a conclusion on the cause of the error if an error occurs.
FIG. 2 shows a matrix as has already been defined above. Possible errors are shown on one axis and phenomena occurring on the other axis during the measurement. In order to analyze an error with a sufficiently high probability, the ascertained phenomena are preferably automatically evaluated. A cross in the matrix means that this phenomenon has occurred. A dash means that the phenomenon is not present. The greater the number of phenomena to be assigned in the case of an error, or the more reliably a phenomenon can be linked to an error, the greater the likelihood that the correct error will be determined. Furthermore, it can be said that with an increasing number of relevant measured variables in the matrix, an error assignment can be made more clearly and reliably.
the measurement is carried out in three color channels (X, Y, Z), each with a CCD element; if one of them fails, this is noticeable for all measured values, ie a cross should be entered in the "Hardware" line in each box in the matrix, equivalent to the "no paper” line.
the matrix must therefore be expanded to include the columns: X values, Y values, Z values, because a CCD defect is only noticeable in one of these columns.

Landscapes

Engineering & Computer Science (AREA)
Quality & Reliability (AREA)
Inking, Control Or Cleaning Of Printing Machines (AREA)
Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Spectrometry And Color Measurement (AREA)
Accessory Devices And Overall Control Thereof (AREA)

EP96105187A 1995-05-04 1996-04-01 Procédé d'inspection d'images et d'alimentation en encre dans des produits imprimés d'une machine d'impression Expired - Lifetime EP0741026B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19516354A DE19516354A1 (de)	1995-05-04	1995-05-04	Verfahren zur Bildinspektion und Farbführung an Druckprodukten einer Druckmaschine
DE19516354		1995-05-04

Publications (3)

Publication Number	Publication Date
EP0741026A2 true EP0741026A2 (fr)	1996-11-06
EP0741026A3 EP0741026A3 (fr)	1998-03-25
EP0741026B1 EP0741026B1 (fr)	2001-02-21

Family

ID=7761056

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP96105187A Expired - Lifetime EP0741026B1 (fr)	1995-05-04	1996-04-01	Procédé d'inspection d'images et d'alimentation en encre dans des produits imprimés d'une machine d'impression

Country Status (3)

Country	Link
US (1)	US6373964B1 (fr)
EP (1)	EP0741026B1 (fr)
DE (2)	DE19516354A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US7059245B2 (en)	2002-04-03	2006-06-13	Heidelberger Druckmaschinen Ag	Method of controlling printing presses
WO2010020569A2 (fr) *	2008-08-21	2010-02-25	Koenig & Bauer Aktiengesellschaft	Procédé de réglage des couleurs d'une machine à imprimer
WO2010020564A2 (fr) *	2008-08-21	2010-02-25	Koenig & Bauer Aktiengesellschaft	Procédé de contrôle de la vraisemblance d'au moins une valeur de mesure déterminée dans une machine à imprimer

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US7187795B2 (en)	2001-09-27	2007-03-06	Cummins-Allison Corp.	Document processing system using full image scanning
DE10023270C2 (de) *	2000-05-12	2002-09-12	Kraus Software Gmbh	Verfahren zur Regelung von digitalen Farbdruckeinrichtungen
US20040017578A1 (en) *	2002-07-25	2004-01-29	Gallant John M.	Method of detecting bad dots in print zone
US7017492B2 (en)	2003-03-10	2006-03-28	Quad/Tech, Inc.	Coordinating the functioning of a color control system and a defect detection system for a printing press
US7627141B2 (en) *	2003-04-25	2009-12-01	Quad/Tech, Inc.	System and method for measuring color on a printing press
US8441700B2 (en)	2003-04-25	2013-05-14	Quad/Tech, Inc.	Image processing of a portion of multiple patches of a colorbar
US20040213436A1 (en) *	2003-04-25	2004-10-28	Quad/Tech, Inc.	System and method for measuring color on a printing press
US6850827B1 (en) *	2003-09-02	2005-02-01	Glenn H. Morris, Sr.	Rearward viewing system for use with vehicles
DE102004009271A1 (de) *	2004-02-26	2005-09-15	Man Roland Druckmaschinen Ag	Verfahren zur Farbregelung an Druckmaschinen
US20050226466A1 (en) *	2004-04-06	2005-10-13	Quad/Tech, Inc.	Image acquisition assembly
KR100609912B1 (ko) *	2004-08-26	2006-08-09	삼성전자주식회사	기판검사장치 및 그 제어방법
CN1749005A (zh) *	2004-09-13	2006-03-22	海德堡印刷机械股份公司	印刷开始前最优化的油墨配给
US7510624B2 (en) *	2004-12-17	2009-03-31	Applied Materials, Inc.	Self-cooling gas delivery apparatus under high vacuum for high density plasma applications
US8213688B2 (en) *	2006-05-24	2012-07-03	Heidelberger Druckmaschinen Ag	Method and apparatus for operating printing presses
DE102006053788A1 (de) *	2006-11-15	2008-05-21	Giesecke & Devrient Gmbh	Verfahren zur Erkennung von Verschmutzungen im Bereich von Farbübergängen auf Wertdokumenten und Mittel zur Durchführung des Verfahrens
US7548030B2 (en) *	2007-03-29	2009-06-16	Microsemi Corp.—Analog Mixed Signal Group Ltd.	Color control for dynamic scanning backlight
US7812297B2 (en) *	2007-06-26	2010-10-12	Microsemi Corp. - Analog Mixed Signal Group, Ltd.	Integrated synchronized optical sampling and control element
DE102008031995B4 (de)	2007-07-26	2021-04-01	Heidelberger Druckmaschinen Ag	Automatische Bildfehlerkorrektur mittels neuer Druckplatten
WO2009113055A2 (fr) *	2008-03-13	2009-09-17	Microsemi Corp. - Analog Mixed Signal Group, Ltd.	Dispositif de commande de couleur pour luminaire
TW201004477A (en) *	2008-06-10	2010-01-16	Microsemi Corp Analog Mixed Si	Color manager for backlight systems operative at multiple current levels
DE102009033905A1 (de)	2008-08-22	2010-02-25	Heidelberger Druckmaschinen Ag	Farbwerks- und Feuchtwerksanalyse
US8324830B2 (en) *	2009-02-19	2012-12-04	Microsemi Corp.—Analog Mixed Signal Group Ltd.	Color management for field-sequential LCD display
CN103879142B (zh) *	2014-02-21	2016-06-08	南通大学	嵌入式丝网印花机印刷质量自动检测***
DE102014004556A1 (de) *	2014-03-31	2015-10-01	Heidelberger Druckmaschinen Ag	Verfahren zur Prüfung der Zuverlässigkeit der Fehlererkennung eines Bildinspektionsverfahrens
DE102017216260A1 (de) *	2017-09-14	2019-03-14	Heidelberger Druckmaschinen Ag	Bildinspektion von Druckerzeugnissen mit Fehlerklassen
CN111311537A (zh) *	2019-11-28	2020-06-19	中国印钞造币总公司	缺陷检测装置及检测方法
EP3878653A1 (fr) *	2020-03-11	2021-09-15	Heidelberger Druckmaschinen AG	Inspection comprenant une classification d'erreurs

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DE4023329A1 (de) *	1990-07-21	1992-02-06	Polygraph Contacta Gmbh	Einrichtung zur kontrolle und steuerung der qualitaet von druckerzeugnissen
EP0522301A1 (fr) *	1991-07-10	1993-01-13	MAN Roland Druckmaschinen AG	Procédé de surveillance et de réglage du processus d'impression, en particulier dans les machines à imprimer en offset
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1995
- 1995-05-04 DE DE19516354A patent/DE19516354A1/de not_active Withdrawn
1996
- 1996-04-01 EP EP96105187A patent/EP0741026B1/fr not_active Expired - Lifetime
- 1996-04-01 DE DE59606450T patent/DE59606450D1/de not_active Expired - Lifetime
- 1996-05-06 US US08/643,596 patent/US6373964B1/en not_active Expired - Lifetime

Patent Citations (3)

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Publication number	Priority date	Publication date	Assignee	Title
DE4023329A1 (de) *	1990-07-21	1992-02-06	Polygraph Contacta Gmbh	Einrichtung zur kontrolle und steuerung der qualitaet von druckerzeugnissen
US5187376A (en) *	1990-12-20	1993-02-16	Toshiba Kikai Kabushiki Kaisha	Print monitoring apparatus with data processing
EP0522301A1 (fr) *	1991-07-10	1993-01-13	MAN Roland Druckmaschinen AG	Procédé de surveillance et de réglage du processus d'impression, en particulier dans les machines à imprimer en offset

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US7059245B2 (en)	2002-04-03	2006-06-13	Heidelberger Druckmaschinen Ag	Method of controlling printing presses
DE10312998B4 (de) *	2002-04-03	2015-07-09	Heidelberger Druckmaschinen Ag	Lernende Farbführung
WO2010020569A2 (fr) *	2008-08-21	2010-02-25	Koenig & Bauer Aktiengesellschaft	Procédé de réglage des couleurs d'une machine à imprimer
WO2010020564A2 (fr) *	2008-08-21	2010-02-25	Koenig & Bauer Aktiengesellschaft	Procédé de contrôle de la vraisemblance d'au moins une valeur de mesure déterminée dans une machine à imprimer
WO2010020569A3 (fr) *	2008-08-21	2010-05-27	Koenig & Bauer Aktiengesellschaft	Procédé de réglage des couleurs d'une machine à imprimer
WO2010020564A3 (fr) *	2008-08-21	2010-07-01	Koenig & Bauer Aktiengesellschaft	Procédé de contrôle de la vraisemblance d'au moins une valeur de mesure déterminée dans une machine à imprimer
US8100057B2 (en)	2008-08-21	2012-01-24	Koenig & Bauer Aktiengesellschaft	Method for regulating the ink in a printing press
US8176847B2 (en)	2008-08-21	2012-05-15	Koenig & Bauer Aktiengesellschaft	Method for assessing the plausibility of at least one measured value determined in a printing press

Also Published As

Publication number	Publication date
DE19516354A1 (de)	1996-11-07
US6373964B1 (en)	2002-04-16
EP0741026B1 (fr)	2001-02-21
EP0741026A3 (fr)	1998-03-25
DE59606450D1 (de)	2001-03-29

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Publication	Publication Date	Title
EP0741026B1 (fr)	2001-02-21	Procédé d'inspection d'images et d'alimentation en encre dans des produits imprimés d'une machine d'impression
DE102015207566B3 (de)	2016-04-14	Verfahren zur Detektion ausgefallener Druckdüsen in Inkjet-Drucksystemen
DE4335351C2 (de)	2003-04-30	Verfahren und Vorrichtung zur Kompensation von Passerabweichungen in einer Offsetrotationsdruckmaschine
DE69319219T3 (de)	2004-05-06	Vorrichtung und Verfahren zum Prüfen von Drucksachen
EP0357987B1 (fr)	1995-04-05	Procédé de contrôle et/ou de commande du mouillage dans une machine d'impression offset
DE4005558A1 (de)	1991-09-19	Verfahren zur prozessdiagnose einer rotationsdruckmaschine anhand von remissionen von vollton- und rastertonfeldern
EP3456535B1 (fr)	2021-04-21	Inspection d'image des produits imprimés avec des classes d'erreur
DE102014116201A1 (de)	2016-05-12	Vorrichtung und Verfahren zur Kontrolle von Direktdruckmaschinen
DE4335350A1 (de)	1995-04-20	Verfahren und Vorrichtung zur Ermittlung von Passerabweichungen bei mehrfarbigen, in einer Druckmaschine erstellten Druckprodukten
DE10319770A1 (de)	2004-12-09	Verfahren zur Regelung der Farbdichte einer von einer Druckmaschine auf einem Druckträger aufgebrachten Farbe und Vorrichtung zur Regelung verschiedener für den Druckprozess einer Druckmaschine relevanter Parameter
EP1738325A1 (fr)	2007-01-03	Procede pour evaluer la qualite d'un imprime produit par une machine d'impression
EP0356705B1 (fr)	1993-10-20	Lecture de données pour un dispositif de réglage de l'encre
DE102010009961A1 (de)	2010-09-30	Inlinefarbregelung in Druckmaschinen
DE3140760A1 (de)	1982-08-12	"verfahren zur korrektur von abweichungen der einfaerbung und feuchtung an offsetdruckmaschinen"
EP1759844B2 (fr)	2019-04-24	Procédé pour corriger l'impression
DE19518660C2 (de)	1997-10-09	Verfahren zur Einstellung einer Feuchtmittelmenge
EP3871892B1 (fr)	2022-02-09	Détection pour minimiser les déchets
DE102008000031B4 (de)	2014-07-10	Verfahren zur Kontrolle einer Anordnung von an Formzylindern einer Druckmaschine angeordneten Druckformen
EP1727679A2 (fr)	2006-12-06	Procede d'identification d'un exemplaire individuel a image imprimee de qualite defectueuse sur une matiere imprimee comportant plusieurs exemplaires
EP0987110B1 (fr)	2002-01-16	Procédé pour évaluer la qualité d'un matériau traité
DE102018217476A1 (de)	2019-05-23	Variable Druckdüsentestmuster
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