EP2011651B1 - System zur Inspektion eines Druckbildes - Google Patents

System zur Inspektion eines Druckbildes Download PDF

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Publication number
EP2011651B1
EP2011651B1 EP08166931A EP08166931A EP2011651B1 EP 2011651 B1 EP2011651 B1 EP 2011651B1 EP 08166931 A EP08166931 A EP 08166931A EP 08166931 A EP08166931 A EP 08166931A EP 2011651 B1 EP2011651 B1 EP 2011651B1
Authority
EP
European Patent Office
Prior art keywords
region
image
display area
evaluation unit
operating
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.)
Expired - Lifetime
Application number
EP08166931A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2011651A1 (de
Inventor
Jörn SACHER
Harald Willeke
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer 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.)
Filing date
Publication date
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Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of EP2011651A1 publication Critical patent/EP2011651A1/de
Application granted granted Critical
Publication of EP2011651B1 publication Critical patent/EP2011651B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/0036Devices for scanning or checking the printed matter for quality control

Definitions

  • the invention relates to a system for inspecting a printed image according to the preamble of claim 1.
  • a device for detecting printing errors or other errors in a printing machine wherein at least two cameras with a different image resolution at the output of the printing operation in the production direction of a web or a sheet are arranged one behind the other and send their respective output signal to a computer, wherein a screen and a Keyboard are connected to the computer, wherein in the production direction first camera, preferably a synchronized in their image recording with the production speed of the printing machine line scan, a coarser resolution than the subsequent second camera, preferably a CCD area camera, of the first in the direction of production camera recorded images of non-printed or printed in uniform color zones of the web or sheet that control in the direction of production second camera by their displacement transversely to the direction of production, these zones no longer to record systematically, but to record high-resolution images of zones in which the first camera in the production direction has already detected an error, wherein an image taken by the first camera or by the second camera can be displayed on the screen and by operating the keyboard respectively is comparable
  • a method and a device for controlling or regulating operations of a printing machine wherein at least one image pickup device is directed to the surface of a printed product, wherein the image pickup device delivers the surface of the printed product reproducing image information of a control and regulating circuit and wherein on a with the screen connected to the open-loop and closed-loop control circuit can be displayed individually or in sub-images, a target image, an actual image and a difference image, wherein, in the case of an impermissible deviation of the actual image from the target image determined by a comparison device of the control and regulation circuit. Picture an error signal can be output.
  • the helm belongs to a computerized system for quality control and quality control of printed matter produced by a printing press.
  • the control station has, for example, a multiplicity of different operating elements for controlling a color metering system arranged in the printing press in a console or a keyboard belonging to the control station.
  • the quality control is carried out densitometrically or spectrophotometrically.
  • the control station offers a printer the possibility of checking printed copies taken from current production and of making corrections deemed necessary by operating control elements.
  • the invention has for its object to provide a system for inspecting a printed image.
  • the achievable with the present invention consist in particular that a working during production without specimen removal system for inspection of a printed image is provided in its parameterization and in its user interface flexible and application-related preferably alone with integrated in the display area input device and adjustable is comfortable to use. All information required for a particular user group is clearly structured and clearly displayed on the same display area.
  • the system is easily expandable to perform control tasks. Defects in the quality of print images produced by the system during the inspection are displayed and preferably logged during the inspection and, if necessary, automatically lead to the marking or ejection of these defective print images by the system.
  • the single FIGURE shows a highly simplified representation of a display device 01, an evaluation unit 02, an image sensor 03 and several with a printing machine 06 applied to a print carrier 07 printed images 04.
  • the printing machine 06 is z. B. as a rotary printing machine with at least one printing unit, wherein the printing unit has at least one at least one printing plate-carrying forme cylinder (not shown) and cooperating with the forme cylinder transfer cylinder 21.
  • the transfer cylinder 21 is employed against a parallel to its axis A impression cylinder 22, wherein the impression cylinder 22 may be formed as a second transfer cylinder, which in turn cooperates with at least one associated therewith another forme cylinder (not shown).
  • the print carrier 07 is z. As a sheet 07 or a web of material 07, preferably a web 07.
  • the printing machine 06 prints either on a continuous web 07 in the transport direction T successive sequence of printed images 04 or printed a sequence of printed sheets 07 each with at least one print image 04 , wherein the printed sheets 07 are transported in the transport direction T.
  • the image sensor 03 z. B. a color camera 03, preferably a digital semiconductor camera 03 with at least one CCD chip, is directed with its image pickup area 23 on the print substrate 07, wherein the image pickup area 23 of the image sensor 03 at least partially images a printed image 07 applied to the print substrate 04.
  • the image sensor 03 is arranged, for example, at the output of the last printing unit of the printing press 06 in the direction of transport T of the print carrier 07.
  • the image sensor 03 detects z. B. the entire width B of the print carrier 07, wherein the width B of the print carrier 07 extends transversely to the transport direction T.
  • the image sensor 03 supplies an electronically evaluable image of at least part of a printed image 04, but preferably of the entire width B of the printed substrate 07, wherein along the width B of the print substrate 07 at least one print image 04 is applied to the print substrate 07.
  • the image sensor 03 is embodied as an area camera 03 or as a line camera 03, which in each case has an optical device 33, in particular an objective 33, suitable for detecting the desired image recording area 23.
  • An alternative arrangement of the image sensor 03 is that this is not directly downstream of the printing unit, but in one of the printing press 06, which arranged by the printing machine 06 printed images 04 and / or processing device or machine (not shown) is arranged.
  • the evaluation unit 02 which is designed in particular as a program-controlled, electronic computing system 02 and z. B. is located in a belonging to the printing machine 06 control station, receives via a data link 24, z. B. a data line 24, with the recorded image correlated data by the image sensor 03 transmits this data to the evaluation unit 02 or at least retrievable holds.
  • the data correlated with the recorded image are processed in such a way that the image can be displayed on a display surface 08 of the display device 01.
  • the display device 01 and the evaluation unit 02 are preferably connected to one another via a bidirectional data transmission path 31 or data line 31.
  • the image sensor 03, the evaluation unit 02 and the display device 01 together form a system for inspecting at least part of a print image 04 applied to a print substrate 07.
  • the functionality of this system can also be extended to control tasks, as will be explained below ,
  • the evaluation unit 02 is associated with a memory 26 in which data of at least part of the recorded images and / or data can be stored over part of a captured image.
  • the stored data at least the data of a particular image, serves as a reference in comparison with data from continuously updated images.
  • the connection between the evaluation unit 02 and the memory 26 is in a bidirectional data transmission path 27, z. B. data line 27.
  • comparing the data of a currently recorded image with the data of a previously recorded image or a stored reference image can be in the current printing process z.
  • a Passer verifiable ie the intended accuracy
  • the individual partial colors have in the overprint in multi-color printing. Dot gain, register accuracy as well as register accuracy play an important role in multicolor printing.
  • the print image 04 can be qualitatively judged on the basis of an identifying feature characterizing the print image 04 by checking either the recognition feature alone or the print image 04 together with the recognition feature by comparison with a reference image as to whether the recognition feature or print image 04 has the recognition feature belong to a particular class of recognition features or printed images 04, whether the recognition feature has a certain geometric contour and / or a specific relative arrangement to at least one further recognition feature.
  • These tests are preferably fault tolerant, d. H. the assessment is carried out taking into account permissible tolerance limits.
  • the evaluation unit 02 can be equipped with at least one output, from which the positioning command is transmitted via a data transmission path 28 to an actuating drive 29 influencing the printing process in the printing machine 06.
  • Such actuator 29 is z. B. in conjunction with a belonging to the printing unit inking unit or dampening unit, a circumferential register, a page register or a diagonal adjustment for at least one of the forme cylinder relative to its associated transfer cylinder 21 is provided.
  • the output of the evaluation unit 02 can also be used to a lighting device (not shown) for the image sensor 03, z. B. to activate a flash lamp to trigger or turn off.
  • the display device 01 has a graphics-capable display surface 08 with a plurality of differently controllable by the evaluation unit 02, window-like areas 09; 11; 12; 13; 14, wherein a first area 09 optionally displays a currently recorded image, a previously recorded image or a reference image and a second area 11 at least one input field 16; 17 and / or a control panel 18; 19 for setting and / or operation of the evaluation unit 02 and / or for setting and / or operation of the printing machine 06 has.
  • the system can be set with regard to at least one parameter, a function exerted by the system can be called up and / or triggered and / or a positioning command to be issued by the evaluation unit 02 can be input into the system or selected from a set of provided positioning commands.
  • the display device 01 and the evaluation unit 02 can be designed such that in the first area 09 continuously recorded images are displayed. As soon as a currently recorded image reveals that the imaged print image 04 exceeds at least one previously set permissible tolerance limit with regard to its quality to be assessed, the display of this image becomes, so to speak frozen by stopping the display of continuously recorded images. In a variant of this embodiment, the display stops at an image that exceeds at least a previously set allowable tolerance limit, at least for a preferably adjustable duration, before the display of the continuously recorded images is continued with the then currently recorded image.
  • the duration for stopping the display can be z. B. 5 to 15 seconds, preferably 10 seconds.
  • a printed image 04 whose evaluated image indicates that it exceeds a permissible tolerance limit with regard to its quality to be assessed can be identified by means of a marking device (not shown) connected to the system and / or discharged by a conveyor (not shown), wherein the system can be set such that the evaluation unit 02 automatically triggers the marking of the printed image 04 by the marking device and / or the discharge by the conveyor upon detection of exceeding an allowable tolerance limit by the evaluation unit 02 z.
  • B. at its output sends a corresponding control command.
  • the conditions for triggering this control command are preferably selectable and adjustable on the display surface 08.
  • a third region 12 is provided on the display surface 08, wherein the third region 12 displays at least one designation of the evaluation unit 02 and / or a job currently being processed in the printing press 06. Also, in this third area 12 z. Example, whether the current job has undergone a change in its parameters relevant to the printing process.
  • the display area 08 can also have a fourth area 13, the fourth area 13 having at least one menu with a menu structure which opens at its selection with at least one function for operating and / or setting the evaluation unit 02 and / or for operating and / or setting the Printing machine 06 has.
  • the selectable in the fourth area 13 of the display area 08 from a menu function thus relates to z. B. setting up a new with the printing press 06 too processing or changing or editing an existing job, the second area 11 of the display area 08 depending on the selection made in the menu, a fixed sequence of input fields 16; 17 and / or control panels 18; 19 for setting and / or operation of the evaluation unit 02 and / or for setting and / or operation of the printing press 06 pretends.
  • a user is guided with respect to a functionality to be set in the system and / or the printing press 06, in that all settings required for the desired functionality are queried consistently one after the other, with a subsequent query requiring a response to the previous query.
  • an image stored in the memory 26 z. B. selectable by means of the displayable in the fourth region 13 of the display area 08 menu and in the first area 09 of the display surface 08 can be brought to the display.
  • Another in the fourth area 13 in the menu selectable function can, for.
  • Example to set one or more allowable tolerance limits for assessing the quality of the printed images 06 generated by the printing machine 04 or to put the system by an orderly shutdown of its functions out of service, the latter is preferably executable only at a standstill of the printing press 06 and its Completion is indicated by the system by a corresponding message. It is advantageous for a quality characteristic to be assessed, in which an allowable tolerance limit is to be defined, to deposit a number of different sensitivity levels in the evaluation unit 02, for example, B. between five and twenty sensitivity levels, preferably ten sensitivity levels.
  • a fifth region 14 can be provided on the display surface 08, the fifth region 14 indicating at least one status of the evaluation unit 02 and / or the printing press 06. Status displays in this fifth area 14 may, for. B. in the form of a pictogram.
  • the display surface 08 the first area 09 and the second Area 11 arranged side by side and at least two of the five areas 09; 11; 12; 13; 14, preferably all five areas 09; 11; 12; 13; 14, at the same time.
  • the third, fourth and fifth regions 12; 13; 14 are preferably each formed in a line shape, wherein the display surface 08 displays at least the fourth region 13 and the fifth region 14 permanently.
  • the first area 09 of the display area 08 is video-capable and capable of displaying a sequence of several successive pictures in quick succession.
  • the first area 09 of the display surface 08 is thus capable of sequentially displaying images of print images 04 printed on the print substrate 07 or at least of parts of the printed images 04 printed on the print substrate 07 with the image sensor 03 sequentially in a sequence such as that completely or at least partially by the image sensor 03 fixed with respect to the printing press stationary image images 04 due to the transport speed of the print carrier 07, the image pickup area 23 of the image sensor 03 pass.
  • An image playback frequency of the first region 09 of the display surface 08 is therefore at least as large as an image recording frequency of the image sensor 03. According to the transport speed of the print carrier 07 can be such.
  • This film-like display of the printed images 04 has the advantage that z. B. color deviations of their tendency to be quickly recognizable, even if at a display speed of several frames per second, the single print image 04 is no longer discretely inspectable for operators of the printing press.
  • the display of a sequence of printed images 04 also visualizes in which areas of the successively printed printed images 04 such color deviations occur, so that the inking unit can be tracked zonally in its inking.
  • Such an initiated adjustment of zone screws of the inking is then turn after a short time for the operator of the Printing machine in the running in the first area 09 of the display surface 08 film of the print images 04 by a reversal in the tendency of the color deviation recognizable.
  • the electronic control of the display surface 08 is to be designed such that video signals can be processed and displayed.
  • the control must z. B. can process a sufficiently large signal bandwidth at a high speed.
  • the display surface 08 has at least one touch-sensitive field for operation and / or adjustment of the evaluation unit 02 and / or the printing press 06, wherein in particular in the second region 11, the input field 16; 17 and / or the control panel 18; 19 are configured for setting and / or operation of the evaluation unit 02 and / or for setting and / or operation of the printing press 06 as a touch-sensitive field.
  • the display surface 08 is thus preferably designed as a touch screen.
  • the display device 01 and / or the evaluation unit 02 have at least two operating modes, the operating modes being in a different design of the display surface 08 and / or in the scope, ie in particular in the number of displays shown on the display surface 08 and / or or in the scope of the operation and / or adjustment of the evaluation unit 02 and / or the printing machine 06 differ.
  • a change from a currently set operating mode to a larger operating range with respect to the displays and / or the operation and / or the setting of the evaluation unit 02 and / or the printing press 06 preferably depends on the proof of an authorization, this proof z.
  • the order of the displayed on the display surface 08 input fields 16; 17 and / or panels 18; 19 may depend on the currently set mode because z. B. in a certain mode not enabled input fields 16; 17 and / or panels 18; 19 preferably not even displayed or locked in this mode, so that with the input fields 16; 17 and / or control panels 18; 19 otherwise connected Function is not executable.
  • the operating modes differ z. Example is that in one mode only necessary to execute a print job functions are displayed, whereas in another mode z. B. all settings of the system up to the settings of the image sensor 03 and those of the printing press 06 are changeable.
  • the system in particular the display surface 08, has a function to prevent an unintentional or erroneous input on an input field 16; 17 and / or control panel 18; 19 and / or to cancel or delete an erroneous selection from the menu displayed in the fourth area 13 of the display area 08.
  • Also stored in the memory 26 data that are no longer needed are completely or partially z. B. by the operation of a specific control panel 18; 19 erasable.
  • the display surface 08 can in particular in its fifth region 14 z. For example, indicate how many printed images 04 have been produced in total and / or how many well-rated images 04 of the printing machine 06 at a current order already.
  • a z. B. with the displayable in the fourth area 13 of the display area 08 menu callable statistics function can bring information about a single image and / or multiple images for display. This information may preferably be stored in the memory 26 for a limited time and / or be able to be printed and printed there on the basis of a command that can be input to the system to a printer (not shown) connected to the evaluation unit 02.
  • the evaluation unit 02 advantageously has an operating system which supports a method for inter-process communication, which is designed to exchange complex data structures.
  • the operating system may be Windows NT4.0 ⁇ (or higher) or Windows 2000 ⁇ (or higher), and communication may be in accordance with the COM (Common Object Model) / DCOM (Distributed Component Object Model) standard.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Image Processing (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Image Analysis (AREA)
  • Television Signal Processing For Recording (AREA)
EP08166931A 2003-05-02 2004-04-30 System zur Inspektion eines Druckbildes Expired - Lifetime EP2011651B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10319771A DE10319771B4 (de) 2003-05-02 2003-05-02 System zur Inspektion eines Druckbildes
EP04730545.3A EP1620265B2 (de) 2003-05-02 2004-04-30 System zur inspektion eines druckbildes

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP04730545.3A Division EP1620265B2 (de) 2003-05-02 2004-04-30 System zur inspektion eines druckbildes
EP04730545.3A Division-Into EP1620265B2 (de) 2003-05-02 2004-04-30 System zur inspektion eines druckbildes

Publications (2)

Publication Number Publication Date
EP2011651A1 EP2011651A1 (de) 2009-01-07
EP2011651B1 true EP2011651B1 (de) 2009-07-15

Family

ID=33394073

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08166931A Expired - Lifetime EP2011651B1 (de) 2003-05-02 2004-04-30 System zur Inspektion eines Druckbildes
EP04730545.3A Expired - Lifetime EP1620265B2 (de) 2003-05-02 2004-04-30 System zur inspektion eines druckbildes

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP04730545.3A Expired - Lifetime EP1620265B2 (de) 2003-05-02 2004-04-30 System zur inspektion eines druckbildes

Country Status (8)

Country Link
US (1) US7664294B2 (ja)
EP (2) EP2011651B1 (ja)
JP (1) JP2006525145A (ja)
CN (1) CN100395107C (ja)
AT (1) ATE427217T1 (ja)
DE (3) DE10319771B4 (ja)
ES (1) ES2321616T3 (ja)
WO (1) WO2004096547A2 (ja)

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EP2011651A1 (de) 2009-01-07
EP1620265B1 (de) 2009-04-01
DE502004009270D1 (de) 2009-05-14
US20060230358A1 (en) 2006-10-12
EP1620265A2 (de) 2006-02-01
US7664294B2 (en) 2010-02-16
DE10319771B4 (de) 2005-03-17
ES2321616T3 (es) 2009-06-09
CN1784308A (zh) 2006-06-07
DE502004009772D1 (de) 2009-08-27
CN100395107C (zh) 2008-06-18
ATE427217T1 (de) 2009-04-15
WO2004096547A3 (de) 2004-12-23
EP1620265B2 (de) 2017-10-25
DE10319771A1 (de) 2004-11-25
JP2006525145A (ja) 2006-11-09

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