EP1405499A1 - Procede, produit-programme informatique et systeme d'appareils servant a la verification visuelle de donnees d'image - Google Patents

Procede, produit-programme informatique et systeme d'appareils servant a la verification visuelle de donnees d'image

Info

Publication number
EP1405499A1
EP1405499A1 EP02743261A EP02743261A EP1405499A1 EP 1405499 A1 EP1405499 A1 EP 1405499A1 EP 02743261 A EP02743261 A EP 02743261A EP 02743261 A EP02743261 A EP 02743261A EP 1405499 A1 EP1405499 A1 EP 1405499A1
Authority
EP
European Patent Office
Prior art keywords
file
comparison
difference
pixels
files
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Withdrawn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
EP02743261A
Other languages
German (de)
English (en)
Inventor
Manfred Maurer
Joachim Joos
André HELMS
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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 Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP1405499A1 publication Critical patent/EP1405499A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00002—Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G06T7/001—Industrial image inspection using an image reference approach
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/97—Determining parameters from multiple pictures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00—Indexing scheme for image data processing or generation, in general
    • G06T2200/24—Indexing scheme for image data processing or generation, in general involving graphical user interfaces [GUIs]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30144—Printing quality

Definitions

  • the invention relates to a method, computer program product and device system for visually checking print data.
  • the quality of a print product is determined by three key factors: the printing technology, the paper used and the electronic preparation of the print data.
  • the print data is rasterized to represent halftones, which are also often referred to as gray values.
  • raster devices are provided which are implemented by hardware circuits and / or
  • Difference image only sets the pixels that are only contained in one or the other comparison file. If the two image data to be compared are similar, which is usually the case, the difference image contains only thin lines which are difficult to assign to the corresponding characters and patterns in the original image.
  • These known image processing programs are therefore not very suitable for comparing a large number of test pages with one another. In addition, it is very expensive to create extensive comparison files with known ones
  • a corresponding printing device can be found, for example, in EP 0 771 437 B1.
  • This printing device has a printing module with a usable width of at least twice the bandwidth of a narrow recording medium. Two webs of the recording medium are guided through the printing module, the two webs being sections of a long web of the recording medium which are coupled to one another via a turning module, so that the recording medium is first printed with a specific color or predetermined page in the printing module and then again in same print module is printed with a different color on another side.
  • DE 197 23 369 AI discloses a method and a system for visually recognizing the differences between image contents. It is assumed that two image contents that are largely identical are very difficult to distinguish visually from one another. For this reason, it is proposed to display the two image contents alternately, as a result of which the differences appear flashing and are therefore easily recognizable.
  • a pressure monitoring device is known from US Pat. No. 5,187,376 A, in which printed images are examined and deviations the image information from target image information is sensed. In the event of image errors, characteristic data such as the defect position, the time of the defect occurrence, the name of the current paper roll are recorded and stored in a memory. This data makes it easier to find faulty images.
  • DE 199 40 879 A1 discloses a method and a device for the automated comparison of printed images on printing presses.
  • the image is compared using a series of parameter sets, each of which contains indicators for different types of errors.
  • An error message is output via preset tolerance values if a tolerance value has been exceeded in the image comparison.
  • the invention has for its object to provide a method, a computer program product and a device system for the visual inspection of print data, with which a large number of comparison files can be compared quickly and easily.
  • Reference file compared with rastered image data it being determined whether there is a difference between the reference file and the comparison file. If such a difference is found, a difference file is created in which the difference is shown.
  • this method which can be carried out automatically on a device system, the image and reference file are automatically compared and any differences are shown in at least one difference file, so that it is possible to quickly and easily compare a large amount of rastered image data with reference image data.
  • the difference is determined by comparing the data units of the comparison file with which the
  • Reference file the data units corresponding to the data units of the computer system used in executing the method.
  • Such data units are typically data words with a length of 8 bits, 16 bits, 32 bits or 64 bits.
  • Such a comparison of the data words can be implemented with basic commands of the processor of the computer and runs at a very high speed, so that it can be quickly determined whether there is a difference between the comparison file and the reference file.
  • the difference is represented in the difference file in such a way that the pixels that are set both in the comparison file and in the reference file are set with a standard color or are displayed, and the pixels that are only set in the reference file are displayed with a first comparison color and the pixels that are only set in the comparison file are displayed with a second comparison color.
  • a log file is preferably created, in which the location of the differences and, if appropriate, the number of the different pixels are stored.
  • the comparison file can be processed before the comparison with the reference file, for example the pixels being shifted or the entire representation being rotated.
  • the differing pixels can be subjected to a statistical analysis and, if they do not exceed a predetermined number of thresholds within a predetermined range, can be assessed as not justifying any difference.
  • FIG. 1 shows a print production and archive system in a block diagram
  • FIG. 2 shows a simplified process flow in a print production and archive system
  • FIG. 3 work processes in a document processing system
  • FIG. 4 control components in a print production system
  • FIG. 5 shows a system for checking image data, which is shown schematically in simplified form in a block diagram
  • FIG. 6 shows a method for checking image data, which is shown schematically simplified in a flow chart
  • FIG. 7 shows a schematic illustration of the comparison principle
  • FIG. 8 shows a window for selecting the files to be compared
  • FIG. 9 shows a copy of a screen display in which several files are automatically compared with one another
  • Figure 10 is a copy of a screen representation of the
  • FIG. 11 the pictorial representation of a reference file
  • FIG. 12 the pictorial representation of a comparison file
  • FIG. 13 the pictorial representation of a difference file, which was generated by comparing the reference file according to FIG. 11 and the comparison file according to FIG. 12,
  • FIG. 14 the pictorial representation of another
  • Figure 21 schematically shows the structure of a printing device
  • Figure 22 shows a window with special functions of the method according to the invention for the printing device shown in Figure 21
  • Figure 23 shows a window in which the Statistical analysis functions can be set
  • FIG. 24 shows an enlarged detail of a difference file
  • Data network 2 which can be a local area network (LAN) or a larger network (wide area network, WAN).
  • At least one client terminal 3 is attached to the network 2, to which print jobs, i.e. Files containing image data can be generated.
  • Terminal 3 is a computer known per se (e.g. personal computer PC) with a connected screen 3a.
  • the print jobs can optionally also be generated on a main computer (main frame) 4 and / or data from the main frame 4 can be inserted into the print job.
  • the main frame 4 of the data center will have a suitable one Operating system control such as MVS, BS2000 or VSE controlled. Control functions and displays can be carried out on the main frame 4 via the screen 4a connected to it.
  • a tape reader 5 and a first high-performance printer 6 are also connected directly to the main computer 4 (main frame).
  • a second printer 7, a print server 8 and an archive server 9 are also connected to the data network 2.
  • the print server 8 is in turn connected to a second tape reader 10 and a screen 8a.
  • connection 11 between the print server 8 and the main data network 2 the print server 8 is connected via the connection 12 to a second, local network 15, to which further printers 13, 14 are connected.
  • the print server 8 and the printer 14 can optionally with a system 16b for the production of archive stores 16, z. B. with a writing device for optical storage disks (CD-ROM, DVD), magnetic storage disks (magnetic disks), tape storage, cassette storage, "write once read many” (WORM) devices, or for other non-erasable storage devices.
  • the archive system 16 However, it mainly works together with the archive server 9.
  • the additional devices 9, 16 and 14 connected to them can be operated via additional screens 9a, 16a and 14a and optionally also connections to other components connected to the network 2 can be established.
  • FIG. 2 shows basic components for archiving.
  • the data stream emitted by the host computer 4 is collected in a spooler 20, parameters of the spooler 20 being entered or entered by an operator via an administrator unit 21. to be provided .
  • the spooler 20 is installed as a software program in the print server 8 or in the host computer 4. It uses various devices (interfaces, memory, bus system) of the server 8 and / or the host
  • the spooler 20 then outputs a spool file 22 and passes it to the printer 6 and / or one Archiving component 23 to. From there, the individual documents can be displayed on workplaces 24 or printed out again.
  • the spool file can be transmitted in various data formats, for example in line data format (Line Data) or in AFP format.
  • line Data Line Data
  • AFP AFP
  • the documents are saved with all the information they need so that they can be retrieved and duplicated at any time in the original print quality, even if the computer system environment or the print environment has changed at a later point in time.
  • the workstations 24 may access the archive component 23 in particular via a network, such as via the Internet, the access this technology browser such as Microsoft Internet Explorer ® or Netscape Communicator ® can be used by known per se.
  • FIG. 3 shows four basic stages for processing document data in a document production system with a connected printing system.
  • a first phase generation
  • document or image data are generated or read into the document data system. This can happen in three ways, namely on the one hand by creating a document with an application software (third party
  • the incoming data streams are standardized to a uniform format (AFP), the data is indexed, enriched with control data, resource data is generated, the data stream is re-sorted / consolidated, and finally the data streams are segmented so that they are output-specific subsequent output steps (distribution, printing) can be carried out at high speed.
  • AFP uniform format
  • resource data is generated
  • the data stream is re-sorted / consolidated
  • the data streams are segmented so that they are output-specific subsequent output steps (distribution, printing) can be carried out at high speed.
  • a distribution module "SPS-Rooter” 25 is used to distribute the print data to different output channels.
  • the data can optionally be fed to systems for electronic transmission, for example by e-mail, in an e-commerce module 26, a display module " Online browsing "27, an archiving system 28 or print production systems 29a, 29b, 29c.
  • special printing systems can be used to output the printing data in a network (in particular a network of printing devices connected via the Internet) 29c or via a local central printing system 29b located at a specific location.
  • the process stages of processing, distribution and possibly printing are monitored by monitoring modules 30.
  • Fig. 4 shows schematically simplified the structure of the control components in a print production system.
  • the print production system comprises a control system 33 and a printer 34.
  • the control system has a print-ob manager 35, which processes incoming print jobs (print jobs) of different formats (AFP, PS, PCL, PDF) and with a job ticket (.TIC ) in which the accompanying data required for processing the print job are stored.
  • the print job manager 35 forwards the print jobs to a control module 36 (ODS: Order Distribution System), which forwards the print jobs to a print production program 37 or a print data stream converter 38.
  • ODS Order Distribution System
  • the print data converted by the print data stream converter 38 into the IPDS print data stream is fed to a raster device 39, in which it is rasterized and converted into a PIXEL file, which is, for example, in TIFF format.
  • the PIXEL file can be stored in an archive 40 or can be displayed via a display module 41 by means of a display program 42a, 42b.
  • the display module is a software module that converts the PIXEL file either unchanged in TIFF format to the display program 42a or in another format (eg PDF) and, if necessary, with regard to further parameters, such as, for example, the offset as a function of the folding, the paper shrinkage corrected forwards to the display program 42b.
  • This display module 41 has connections to the control module 36 and to the raster device 39, which schematically show that a user can correct the print data by viewing the PIXEL files represented by the display programs 42a and 42b.
  • a raster device 43 which can receive a print data stream either directly from the print data stream converter 38 or a print data stream from the display module.
  • the raster device 43 rasterizes the print data stream and forwards it to a character generator 44 which, for. B. consists of an LED comb and exposes a photoconductor drum 45 in accordance with the rasterized print data.
  • a sheet of paper 46 is printed using the exposed photoconductor drum 45.
  • the raster device can access a data memory 47 in which the printing parameters of the printer 34 are stored. These printing parameters can be changed using a BUC controller 48 (Basic Unit Controller), which is equipped with a control panel 49 and units 50, such as, for example. the paper feed devices.
  • BUC controller 48 Basic Unit Controller
  • the raster device 39 of the control system 33 is a functionally identical replica of the raster device 43 of the printer 34. This ensures that the representation generated with the display programs 42a, 42b is identical to a potential printout on paper.
  • FIG. 5 shows a system for visually checking image data, in particular print data, which has a print job generator 51, a raster device 52, a printer 53, a TIFF generator 54, an archive system 55 and a comparison system 56.
  • the raster device corresponds to the raster devices 39 and 43 described above.
  • the print job generator is represented by any image or text generation program running on a commercially available computer system.
  • the print job generator generates an image file containing image data, which is referred to below as a comparison file.
  • image file also includes any
  • the rasterizer 52 converts the comparison file into print data by rasterizing, which can either be printed on paper at the printer 53 or converted into a TIFF file by means of the TIFF generator 54.
  • This TIFF file is either fed to the archive system 55 and stored there or is fed to the comparison system 56 by comparing the comparison file with a reference file.
  • the comparison system 56 is a computer system with a special computer program product for carrying out the comparison.
  • the comparison system 56 has a screen 57 and an input unit 58.
  • the comparison system 56 is coupled to the print job generator 51.
  • Reference files containing rastered image data are stored on the comparison system.
  • the reference files are based stored original files that have been converted to the reference files by a raster process.
  • the original files are sent to the print job generator 51, which converts the original files into comparison files.
  • the comparison files are from the
  • Raster device 52 rasterized.
  • the comparison files thus contain rastered image data which can be used as print data for driving the printer 53.
  • This rasterized image data can also be converted by the TIFF generator 54 into comparison files in TIFF format.
  • TIFF files are either stored in the archive system 55 or, if they are to be compared with the reference files, fed to the comparison system 56 by carrying out a corresponding comparison.
  • step S2 the comparison file is subjected to preprocessing.
  • the size, orientation and format of the reference files can be adjusted here. This is explained in more detail below.
  • step S3 a comparison file and a reference file are compared and it is determined whether there is a difference.
  • This comparison is made of files (comparison file,
  • Reference file is performed by comparing the data units used in the computer system used for the comparison system 56.
  • Such data units are data words with a length of 8 bits, 16 bits, 32 bits or 64 bits. The length of the data words depends on the architecture and CPU of the computer system. Such data words can be compared very quickly, so that the determination of whether there is a difference or not can be made very quickly.
  • step S4 a query is made as to whether there is such a difference, i.e. whether the comparison file differs from the respective reference file. If this is the case, a difference file is created in step S5.
  • the difference file has the same format as the comparison file.
  • Each pixel of the difference file corresponds to a pixel of the comparison file and the reference file, which has the same position on the images described by the respective files.
  • the pixels are set with a standard color, which are set in both the reference and the comparison file.
  • the pixels that are only set in the reference file and not in the comparison file are shown in the difference file with a first comparison color and the pixels that are only set in the comparison file and not in the reference file are shown in the difference file with a second comparison color shown.
  • the standard color is black and the comparison colors are blue and red.
  • step S6 After the difference file has been created, an entry is made in a log file in step S6, which contains the name of the difference file and the number of pixels of the comparison file which differ from the reference file.
  • step S7 it is queried whether a further comparison file is to be compared with a further reference file. If the result of this query is yes, the method sequence goes back to step S3, so that steps S3 to S7 are carried out again in accordance with the above description. If the query in step S4 shows that none
  • the process sequence goes directly to the step S7 without creating a difference file and adding an entry to the log file.
  • step S7 shows that no further comparison file can be compared with a reference file
  • the results of the comparison are displayed on the screen 57. If only one comparison file was to compare it with a reference file, so 'the appropriate difference file is displayed on the screen. Otherwise, a list with the difference files is displayed so that the
  • FIG. 7 schematically shows the principle for creating the difference file.
  • a comparison file 59a is compared with a reference file 60a in the comparison system 56.
  • the comparison file 59a and the reference file 60a each contain a rasterized image in TIFF format.
  • the comparison system 56 compares the pixels of the comparison file 59a and the reference file 60a in pairs. This is shown schematically by corresponding sections of bitmaps 59a / l and 60a / l in FIG. 7, which each show the set pixels 61 and the non-set pixels 62.
  • the pixels, which are each arranged in the same position in the images represented by the comparison file or reference file, are compared in pairs. If these pixels are set both in the comparison file and in the reference file, the corresponding pixel in the difference file 63a is set with a standard work (pixel 64).
  • the standard color is usually black or gray.
  • the corresponding pixel 65 in the difference file is set in a first comparison color (for example blue).
  • a first comparison color for example blue.
  • this image point 66 is set in the difference file 63a in a second comparison color (for example red).
  • FIG. 8 shows a window of a display on the screen 57 of the comparison system 56, with which a reference file and a comparison file can be selected.
  • a button 67 is shown in this window. When they are actuated, the method according to the invention for comparing the files specified in the window is carried out.
  • ⁇ agfatest ⁇ PS235.600 ⁇ SPECIAL is compared to a file 00018FOM.TIFF which is stored in the directory ⁇ agfatest3 ⁇ PS235.600 ⁇ SPECIAL.
  • Difference files are not yet created, which is why the corresponding field is free.
  • This window also shows statistics on the processing of the files to date, which shows the total number of files or pages to be compared. In the present case there are 49 pages. 17 pages have already been completed. The result of this run is shown in the screen representation shown in FIG.
  • This screen display has a window 69 for displaying the content of the log file and the window 70 for displaying the content of a difference file.
  • the log file contains the file names of all difference files, which are present as TIFF files in the present exemplary embodiment. Furthermore, the number of pixels (pixels) that differ in the comparison file from the reference file are given for each difference file. Clicking on one of the difference files displays its content in window 70. 10, the difference file 00018FOd.TIF is shown in window 70. The complete representation of this difference file is shown in FIG. 13. FIG. 11 shows the content of the corresponding reference file and FIG. 12 shows the content of the corresponding comparison file.
  • the pixels that are set both in the reference file and in the comparison file are shown in gray color.
  • the pixels that are only set in the reference file are shown in blue in the difference file (pixels 71).
  • the pixels that are only set in the comparison file are in the
  • Difference file shown in red color (pixels 72).
  • the pixels 71, 72 are shown darker than the other pixels set in gray color.
  • FIG. 14 shows a further difference image that was generated by comparing a reference file and a comparison file, the reference file and the comparison file essentially showing the same characters, with differences resulting from a change in the characters at the edges of individual characters.
  • the corresponding pixels are in the The original representation is again shown in blue (pixels 71) and red (pixels 72).
  • the user can quickly and easily recognize that the differences between the reference file and the comparison file are due to the new design of the characters and that this should not be assessed as an error in the raster device.
  • the pixels of the comparison file and / or reference file can be shifted up, down, left and right during the preprocessing, the number of lines or pixels by which the pixels are shifted can be entered in the window shown in FIG. 16 ,
  • the direction (up, down, left, right) can also be selected.
  • the comparison file when the comparison file is moved, the reference file is simultaneously displayed in a different color, so that the user matches the two files as closely as possible can. Furthermore, the rotation of the image data of the comparison file in a predetermined direction by a predetermined amount can be provided as an additional option.
  • the distance between two pixels can be measured.
  • the corresponding window is shown in FIG. 17, in which the distance in the horizontal and in the vertical direction is indicated in pixels (pels), inches and cm.
  • the standard color print (ident.)
  • First comparison color reference (track A)
  • second comparison color compare (track B)
  • the program according to the invention has special functions for an electrographic printing device for printing on tape-shaped recording media 110 of different bandwidth, as shown in FIG.
  • Such a printing device is known from EP 771 437 B1 or the corresponding US Pat. No. 5,790,924, to which full reference is made and which is incorporated by reference into the present application.
  • This printing device contains an electromotive driven photoconductor drum as intermediate carrier 111.
  • the various units for the electrophotographic process are grouped around the intermediate carrier 111. These are essentially: a charging device 112 in the form of a charging corotron for charging the intermediate carrier 111; a character generator 113 with a light-emitting diode comb for character-dependent exposure of the intermediate carrier 111, which extends over the entire usable width of the intermediate carrier 111; a developer station 114 for coloring the character-dependent charge image on the intermediate carrier 111 with the aid of a one- or two-component developer mixture; a transfer printing station 115, which extends over the width of the intermediate carrier 111 and with which the toner images are transferred to the recording carrier 110.
  • a cleaning station 116 is provided, with a cleaning brush integrated therein with the associated suction device and a discharge device 117.
  • the intermediate carrier 111 is driven by an electric motor and moved in the direction of the arrow in the printing mode.
  • the printing device contains a fixing station 118 arranged downstream of the transfer printing station 115 in the transport direction of the recording medium, which is designed as a thermal printing fixing station, with a heated fixing roller 119 with associated pressure roller 120, and a feed device 121 arranged downstream of the fixing station with guide rollers for feeding the recording medium 110 to one internal stacking device 122/1 or to an external stacking or other post-processing device 122/2 arranged outside the printing device.
  • the tape-shaped recording medium 110 is started from an internal 123/1 or external 123/2 storage area via feed rollers
  • the recording medium is transported via a transport device assigned to the transfer printing station 115
  • a turning device 128 is arranged in a receiving area for the internal supply stack 123/1, with which the recording medium can be turned for printing on the back after printing on the front and can be fed to the transfer station 115 again.
  • the turning device 128 is connected to the fixing station 118 via a return channel 129.
  • the intermediate carrier 111 (photoconductor drum) has a usable width which corresponds to the largest possible recording medium width (for example a wide recording medium with a width corresponding to the format DIN A3 landscape). This width corresponds to twice the A4 width. It is thus possible to arrange two narrower recording medium webs in the DIN A4 format alongside one another in the area of the transfer printing station 115.
  • the fixing station 118 and the other electrophotographic units, such as developer station 114, character generator 113, cleaning station 116 are designed in accordance with this usable width. In the transfer printing station 115, two narrow recording medium webs can thus be arranged next to one another and transported.
  • These two record carrier webs can be coupled to one another via the turning device 128 in such a way that a single record carrier web is led twice through the transfer printing station 115, it being printed, for example, once on the front side and once on the rear side. Likewise, it is possible to guide this record carrier web twice through the transfer printing station 115 in such a way that the front side is printed in each case. This is useful, for example, in the case of 2-color printing (highlight color printing), the base color (black) being printed on the first pass through the transfer printing station, the highlight color color being printed on the other pass.
  • the program according to the invention has a special function which can be set using the window shown in FIG.
  • a page with the entire width of the transfer printing station 15 is shown under "page cropping".
  • this page can be divided into two webs (Track A, Track B). The two webs are separated by the distance to The left margin of the entire page and its page width can be defined, as well as how much sheet there is between the printing of a certain sheet on the web A and the printing on the web B.
  • a single sheet mode (Single) is used for where only one record carrier web is passed through the transfer station 15, a double sheet mode in which the paper web is passed through the transfer station 15 twice with a reversal to duplex printing or whether there is a color mode in which the paper web is passed through the transfer station 15 twice with the same side and is printed with two different colors and you can also specify whether the front side is on web A ( Track A) or on web B (track B) is printed.
  • the print image composed of two comparison files (separation files) with both color separations can be displayed on the screen with a color print, whereby the user can also check the complete print image.
  • the paper shrinkage after the first printing process on the recording medium is taken into account, according to which the second printout is made on a correspondingly smaller paper sheet. For this purpose, the image data of the second printing process are mapped accordingly.
  • the printed image of the front side can be displayed on the screen together with the printed image of the rear side, the printed image of the rear side preferably being displayed in a different color or a different brightness than the printed image on the front side.
  • the two printed images of webs A and B can thus be combined with one another on the screen.
  • the comparison with a reference file is carried out separately for each print image on web A and web B in the manner described above with reference to FIG. 6.
  • This simultaneous display of the two print images in two-color printing or in duplex printing allows a particularly simple and quick visual inspection with this special printing device.
  • This function can also be used regardless of the comparison with a reference file.
  • Excerpts with a few differing pixels are rated as no difference. These sections are preferably rectangles 73 (FIG. 24), the size of which can be specified by the user (FIG. 23).
  • the corresponding difference file is assessed as having no difference and can be deleted.
  • the corresponding entries in the log file or in the log difference file are deleted.
  • the difference image shown in FIG. 14 can thus be assessed as having no difference with a specific setting of the statistical analysis and is then not considered in a comparison.
  • the computer program described above is used to compare a print data stream, the rasterized image data of which is mapped onto a TIFF file at a time, with corresponding reference files.
  • a print data stream can comprise several thousand pages.
  • This method is used in particular for testing newly developed or modified raster devices for rasterizing image data. With the method according to the invention and the corresponding computer program, a large amount of data can be quickly checked visually and errors in the raster device can be detected accordingly.
  • the invention relates to a method, a computer program product and a device system for visually checking image data.
  • image data can be compared page by page with reference images. If there is a difference between the image data and the reference data, this is stored in a difference file.
  • the difference file can be displayed on a screen of a comparison system, the pixels which differ between the image data and reference data being marked. LIST OF REFERENCE NUMBERS

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  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

L'invention concerne un procédé, un produit-programme informatique et un système d'appareils servant à la vérification visuelle de données d'image. Le procédé de la présente invention permet de comparer des données d'image avec des données de référence page par page. En cas de différence entre les données d'image et les données de référence, cette différence est enregistrée dans un fichier "différence". Ce fichier "différence" peut être affiché sensiblement sur un écran d'un système de comparaison, les points d'image qui diffèrent entre les données d'image et les données de référence étant repérés.
EP02743261A 2001-07-05 2002-07-03 Procede, produit-programme informatique et systeme d'appareils servant a la verification visuelle de donnees d'image Withdrawn EP1405499A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10132625A DE10132625A1 (de) 2001-07-05 2001-07-05 Verfahren, Computerprogrammprodukt und Gerätesystem zum visuellen Überprüfen von Bilddaten
DE10132625 2001-07-05
PCT/EP2002/007390 WO2003005701A1 (fr) 2001-07-05 2002-07-03 Procede, produit-programme informatique et systeme d'appareils servant a la verification visuelle de donnees d'image

Publications (1)

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EP1405499A1 true EP1405499A1 (fr) 2004-04-07

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EP02743261A Withdrawn EP1405499A1 (fr) 2001-07-05 2002-07-03 Procede, produit-programme informatique et systeme d'appareils servant a la verification visuelle de donnees d'image

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EP (1) EP1405499A1 (fr)
DE (1) DE10132625A1 (fr)
WO (1) WO2003005701A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP1496681A1 (fr) * 2003-07-11 2005-01-12 Axalto S.A. Procédé d'imprimation d'une image sur un support
DE102007015097A1 (de) * 2007-03-29 2008-10-02 Heidelberger Druckmaschinen Ag Farbmessgerät mit Koordinatenabgleich
DK2321012T3 (en) 2008-08-20 2018-12-03 Solasia Pharma K K ORGANIC RELATIONS AND PROCEDURES FOR TREATING CANCER
DE102012008512A1 (de) 2012-05-02 2013-11-07 Eyec Gmbh Vorrichtung und Verfahren zum Vergleich zweier Grafik- und Textelemente enthaltenden Dateien
DE102019208448A1 (de) * 2019-06-11 2020-12-17 Robert Bosch Gmbh Verfahren zur Überprüfung eines Geräts oder einer Maschine
CN114863147B (zh) * 2022-05-30 2023-05-02 中科芯云图像视觉技术(北京)有限公司 一种拼大版印刷图像的智能比对方法、系统及其应用

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GB9022710D0 (en) * 1990-10-18 1990-11-28 Crosfield Electronics Ltd Methods and apparatus for testing image processing apparatus
US5187376A (en) * 1990-12-20 1993-02-16 Toshiba Kikai Kabushiki Kaisha Print monitoring apparatus with data processing
DE4408327A1 (de) * 1994-03-11 1995-09-28 Sietec Systemtechnik Gmbh & Co Verfahren und Gerät zur elektronischen Archivierung der von einem Rechner aufbereiteten Dokumente
JP2000510959A (ja) * 1994-07-15 2000-08-22 オーセ プリンティング システムズ ゲゼルシャフト ミット ベシュレンクテル ハフツング モデユール構造のマルチ機能を有するプリンタ
US5625766A (en) * 1995-05-11 1997-04-29 Creo Products Inc. Software based proofing method for double sided printing
DE19723369A1 (de) * 1997-06-04 1998-12-10 Bitex Gmbh Verfahren zur visuellen Erkennung der Unterschiede zwischen zwei Bildinhalten
ATE240015T1 (de) * 1997-08-29 2003-05-15 Oce Printing Systems Gmbh Verfahren und gerät zur elektronischen archivierung eines computer-datenstroms
DE19940879A1 (de) * 1999-08-27 2001-03-08 Innomess Elektronik Gmbh Verfahren und Vorrichtung zum automatisierten Vergleich von Druckbildern an Druckmaschinen

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See references of WO03005701A1 *

Also Published As

Publication number Publication date
DE10132625A1 (de) 2003-01-23
WO2003005701A1 (fr) 2003-01-16

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