DE10132625A1 - Process, computer program product and device system for visually checking image data - Google Patents

Process, computer program product and device system for visually checking image data

Info

Publication number
DE10132625A1
DE10132625A1 DE10132625A DE10132625A DE10132625A1 DE 10132625 A1 DE10132625 A1 DE 10132625A1 DE 10132625 A DE10132625 A DE 10132625A DE 10132625 A DE10132625 A DE 10132625A DE 10132625 A1 DE10132625 A1 DE 10132625A1
Authority
DE
Germany
Prior art keywords
file
comparison
difference
reference
pixels
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Withdrawn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
DE10132625A
Other languages
German (de)
Inventor
Manfred Maurer
Joachim Joos
Andre 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.)
Oce Printing Systems 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
Priority to DE10132625A priority Critical patent/DE10132625A1/en
Publication of DE10132625A1 publication Critical patent/DE10132625A1/en
Application status is Withdrawn legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00002Diagnosis, testing or measuring; Detecting, analysing or monitoring not otherwise provided for
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/0002Inspection of images, e.g. flaw detection
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/0002Inspection of images, e.g. flaw detection
    • G06T7/0004Industrial image inspection
    • G06T7/001Industrial image inspection using an image reference approach
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/97Determining parameters from multiple pictures
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00Indexing scheme for image data processing or generation, in general
    • G06T2200/24Indexing scheme for image data processing or generation, in general involving graphical user interfaces [GUIs]
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00Indexing scheme for image analysis or image enhancement
    • G06T2207/30Subject of image; Context of image processing
    • G06T2207/30108Industrial image inspection
    • G06T2207/30144Printing quality

Abstract

The invention relates to a method, a computer program product and a device system for visually checking image data. DOLLAR A With the method according to the invention, 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 essentially be displayed on a screen of a comparison system, the pixels which differ between the image data and reference data being marked.

Description

  • The invention relates to a method, computer program product and device system for visually checking print data.
  • The quality of a printed matter is made up of three essentials Influencing factors determined: From printing technology, from used paper and from electronic processing the print data.
  • The print data is rasterized to display halftones, which are also often referred to as gray values. An overview of known rest techniques can be found in "The Printer Book Technology and Technologies" of the OPS high-performance printer printing technologies, publisher and editor: Dr. Gerd Goldmann, Edition 5 a, October 2000, ISBN 3-00-001019-X in Chapter 6.
  • Screening devices are used to screen the print data provided by hardware circuits and / or Software modules can be displayed. The screening techniques are subject to constant development and will open up adapted to different special applications. New developed or modified grid devices must tested whether they rasterize image data correctly.
  • It was common to test a new grid device, one reference file rasterized with the raster device print it out and one with another To compare the raster device generated expression. This Method is very error-prone, tiring and time-consuming especially if the reference file is more than 10,000 Test pages included.
  • To simplify this process, Oce Printing Systems GmbH has developed a computer program system called "Pricont", with which the test pages are not printed out on paper, but are saved on a computer system as screened TIFF files. The TIFF files can then be viewed on the computer system using known image processing programs, such as Adobe Photoshop 2.5 ®.
  • These known image editing programs have functions on which difference images are generated. With this Function, two comparison files are compared and in the Difference image just set the pixels that either only in one or the other comparison file are included. Are the two image data to be compared Similar to what is usually the case, it contains that Difference image only thin lines that are difficult to to assign appropriate characters and patterns in the original image are. These are well known image editing programs not suitable for a large number of test pages to compare with each other. It is also very expensive extensive comparison files with known Process and compare image processing programs.
  • There is therefore a significant need to provide funds with which rastered image data quickly and easily can be compared.
  • This need is not only for grid devices for Printing devices, but also for any other Image data of electrical processing devices. Such Facilities are used, for example, in the archiving system used for which print data from a print data format in a pixel-based or rasterized image format converted and this converted data one Archiving system and / or the point by point Control unit of a printer are supplied. Corresponding devices and methods are, for example, from the US 5,940,584 and WO 99/12337 A2. With this System it is possible to get a precise copy of printed Data or data prepared for printing in one Archive storage. In addition to the image data Initiation data formed, which in the archiving system together with the image data can be saved to a later retrieval of the documents in the archive system enable.
  • A corresponding printing device goes out, for example EP 0 771 437 B1. This printing device has one Print module with a usable width of at least that twice the bandwidth of a narrow record carrier. The printing module creates two webs of the Record carrier performed, the two tracks Are sections of a long path of the record carrier, which are coupled to each other via a turning module, so that the record carrier first in the print module with a certain color or predetermined page is printed and then again in the same print module with a different color printed on another side.
  • The invention has for its object a method Computer program product and a device system for visual Checking print data to create which one large number of comparison files quickly and easily can be compared.
  • The object is achieved with a method according to claim 1 Computer program product according to claim 17 and one Device system according to claim 19 solved. advantageous Embodiments of the invention are in the corresponding Subclaims specified.
  • According to the method according to the invention, at least one Comparison file with rastered image data with at least one Reference file compared with rastered image data, where it is determined whether between the reference file and the Comparison file there is a difference. If such Difference is found, a difference file created in which the difference is shown.
  • Through this procedure, the automatically on a device system is executable, the image and reference file automatically compared and any differences in represented at least one difference file so it is possible a large amount of rasterized image data quickly and easy to compare with reference image data.
  • According to a preferred embodiment, this is done Find a difference by comparing the Data units of the comparison file with which the Reference file, where the data units, the data units of the computer system that is used when executing the procedure is used to match. Such data units are typically data words with a length of 8 bits, 16 bits, 32 bit or 64 bit. Such a comparison of the data words can be done with basic commands from the processor of the Computers implement and run at very high Speed so that it can be quickly determined whether there is a difference between the comparison file and the Reference file is available.
  • If there is a difference between the comparison file and the Reference file is found, then a preferred one Embodiment of the invention the difference in such a way Difference file represented that the pixels that both set in the comparison file as well as in the reference file are set or displayed with a standard color and the pixels that are only in the reference file are shown with a first comparison color and the pixels that are only in the comparison file are shown with a second comparison color become.
  • A is preferably used in the method according to the invention Log file created in which the location of the differences specified and, if applicable, the number of there distinguishing pixels can be saved.
  • According to the invention, the comparison file can be compared edited with the reference file, for example the pixels shifted or the entire display is rotated.
  • According to a further preferred embodiment, the differing pixels of a statistical analysis be subjected and if they are not within a predetermined range a predetermined threshold number exceed as no difference become.
  • The invention is explained in more detail below using the example of attached drawings explained. In which show:
  • Fig. 1 is a print production and archiving system in a block diagram,
  • Fig. 2 is a simplified process flow in a print production and archiving system,
  • Fig. 3 workflow in a document processing system,
  • Fig. 4 control components in a print production system,
  • Fig. 5 shows a system for verifying image data, which is a simplified schematic representation shown in a block diagram,
  • Fig. 6 is a method of checking image data, which is a simplified schematic representation illustrated in a flow chart,
  • Fig. 7 is a schematic representation of the comparison principle,
  • Fig. 8 shows a window for selecting the files to be compared
  • Fig. 9 is a copy of a screen display in which a plurality files are automatically compared with one another
  • Fig. 10 is a copy of a screen showing the result of the comparison through the barrel of FIG. 9,
  • 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 that has been generated by comparing the reference file shown in FIG. 11 and the comparison file shown in FIG. 12,
  • Fig. 14, the pictorial representation of a further differential file,
  • Fig. 15-20 window for additional options and features of the inventive method,
  • Fig. 21 schematically illustrates the structure of a printing apparatus,
  • Fig. 22 is a window with special features of the inventive method for the in Fig. 21 shown printing apparatus,
  • Fig. 23, a window can be set in which the functions for statistical analysis, and
  • Fig. 24 is a detail of a difference file in an enlarged view for explaining the analysis function.
  • In Fig. 1, a high-capacity printing system 1 is shown in which various system components via a data network 2, which may be a local area network (Local Area Network, LAN) or a larger network (Wide Area Network, WAN). At least one client terminal 3 is attached to the network 2 , on which print jobs, ie files containing image data, can be generated. The terminal 3 is a computer known per se (e.g. personal computer PC) with a connected screen 3 a.
  • 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 is controlled by a suitable operating system control such as MVS, BS2000 or VSE. Control functions and displays can be carried out on the main frame 4 via the screen 4 a 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 in turn is connected to a second tape reader 10 and a screen 8 a. In addition to the 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 16 b for the production of archive stores 16 , z. B. with a writing device for optical disks (CD-ROM, DVD), magnetic disks (magnetic disks), tape storage, cassette storage, "write once read many" (WORM) devices, or for other, non-erasable memory, are connected. The archive system 16 works mainly with the archive server 9 . The additional devices 9 , 16 and 14 connected to them can be operated via additional screens 9 a, 16 a and 14 a and optionally also connections to other components connected to the network 2 can be established.
  • Fig. 2 shows the 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 provided by an operator via an administrator unit 21 . 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 computer 4 . The spooler 20 then outputs a spool file 22 and feeds it to the printer 6 and / or an archiving component 23 . 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 or in AFP format. In the course of archiving, 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 can access the archive component 23 in particular via a network, for example also via the Internet, the access being able to be used by browser technologies known per se, such as the browser Microsoft Internet Explorer® or the Netscape Communicator®.
  • In FIG. 3, four basic stages for processing document data in a document production system are shown with attached printing system. In 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 generating a document with an application software (third party software), for example by a word processing system, a graphic image generation system, an office scanner which scans paper originals or the like. In a second application (legacy application), existing document data can be in the form of an AFP data stream (AFPapplication) or a format that is not further specified (legacy application). In a second processing stage "preparation", the respective data for the subsequent output steps (distribution printing) are processed. A control system (PLC) is used for this, with which the three processing stages are coordinated in the form of a production process. It comprises the three components for the three processing steps. In the first component 45 (SPS-CIS), 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.
  • A distribution module "SPS-Rooter" 25 is used to distribute the print data to various output channels. With the distribution module 25 , 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 29 a, 29 b, 29 c. In particular, special printing systems for outputting the print data in a network (in particular a network of printing devices connected via the Internet) 29 c or via a local central printing system 29 b located at a specific location can be used. 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 includes a control system 33 and a printer 34 . The control system has a print job manager 35 , which processes incoming print jobs (print jobs) of different formats (AFP, PS, PCL, PDF) and provides them with a job ticket (.TIC), in which those for processing the print job necessary accompanying data 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 .
  • 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 42 a, 42 b. The display module is a software module that converts the PIXEL file either unchanged in TIFF format to the display program 42 a or into another format (e.g. PDF) and, if necessary, with regard to other parameters, such as. B. the offset depending on the folding, the paper shrinkage corrected to the display program 42 b.
  • 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 shown by the display programs 42 a and 42 b. A raster device 43 is located in the printer 34 , 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 rasterizer 43 rasterizes the print data stream and forwards it to a character generator 44 which, for. B. consists of an LED comb and exposed a photoconductor drum 45 according to the rasterized print data. With the help of the exposed photoconductor drum 45 , a paper sheet 46 is printed.
  • 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. B. the paper feed devices is connected.
  • 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 display generated with the display programs 42 a, 42 b is identical to a potential printout on paper.
  • Fig. 5 shows a system for visually verifying image data, in particular compressed data, comprising a print job generator 51, a rasterizer 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. In the context of the present invention, the term image file also includes any text file. The rasterizer 52 converts the comparison file into print data by rasterization, which can either be printed on paper at the printer 53 or converted into a TIFF file using the TIFF generator 54 . This TIFF file is either fed to the archive system 55 and stored there or 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 performing 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. In addition to these reference files, the original files on which the reference files are based are stored, which 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 rasterized by the raster device 52 . 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. These 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.
  • The method for comparing the comparison files containing the rastered image data with the reference files is shown schematically simplified in the flowchart in FIG. 6.
  • This process begins with step S1. In step S2 the comparison file is subjected to preprocessing. The comparison file can be sized, aligned and Format of the reference files can be adjusted. This will be below explained in more detail.
  • The method sequence then goes to step S3, with which a comparison file and a reference file are compared and it is determined whether there is a difference. This comparison of the files (comparison file, reference file) is carried out 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.
  • In step S4 it is queried whether such a difference is present, d. H. whether the comparison file differs from the respective Reference file differs. If so, where is in Step. 55 created a difference file. The difference file has the same format as the comparison file. Everyone The pixel of the difference file corresponds to one Pixel of the comparison file and the reference file, the the same position in the through the respective files described images. Are in the difference file the pixels are set with a standard color, both in the reference as well as in the comparison file are set. The pixels that are only in the reference file and not in the Comparison files are set in the difference file shown with a first comparison color and the Pixels that are only in the comparison file and not in the Reference file are set, are in the difference file with a second comparison color. Typically the standard color is black and the comparison colors are blue and red.
  • After the difference file has been created, step S6 turns on Inserted an entry in a log file in which the name of the Difference file and the number of pixels of the Comparison file that is different from the reference file distinguish is included.
  • In step S7, it is queried whether another comparison file can be compared with another reference file. Is this If the result of this query is yes, the process proceeds back to step S3, so that steps S3 to S7 can be executed again according to the description above. If the query in step S4 shows that none Difference between the comparison file and reference file the process flow goes directly to the step S7 over without creating a difference file and a Entry is added to the log file.
  • If the query in 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 a comparison file could be compared with a reference file, the corresponding difference file is displayed on the screen. Otherwise, a list with the difference files is displayed, so that the user can also select a difference file for display on the screen.
  • The method is ended in step S9.
  • Fig. 7 shows schematically the principle for creating the difference file. Here, a comparison file 59 a is compared with a reference file 60 a in the comparison system 56 . The comparison file 59 a and the reference file 60 a each contain a rasterized image in TIFF format. In the comparison system 56 , the pixels of the comparison file 59 a and the reference file 60 a are compared in pairs. This is shown schematically by corresponding sections of bitmaps 59 a / 1 and 60 a / 1 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 63 a is set with a standard color (pixel 64 ). The standard color is usually black or gray. If a pixel in the comparison file is not set, although it is set in the reference file, the corresponding pixel 65 in the difference file is set in a first comparison color (for example blue). If a pixel is only set in the comparison file, but not in the reference file, this pixel 66 is set in the difference file 63 a in a second comparison color (e.g. red).
  • The method described above is by the applicant realized by means of a computer program product. The following are functions of this computer program product explained in more detail.
  • Fig. 8 shows a window of a display on the screen 57 of the comparison system 56, with a reference file and a reference file can be selected. A button 67 is shown in this window. When they are operated, the method according to the invention for comparing the files specified in the window is carried out.
  • As has been explained above, several comparison files can also be compared with several reference files with the method according to the invention. Batch programs are provided for this purpose, which automatically compare several files. Such a batch program is shown in FIG. 9, wherein window 68 is also shown, which is displayed when the batch program is executed. According to this window, the file 00018FOM.TIFF, which is stored in a directory \ agfatest \ PS235.600 \ SPECIAL, is compared with a file 00018FOM.TIFF, which is stored in the directory \ agfatest3 \ PS235.600 \ SPECIAL. The difference file is 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 display shown in FIG. 10. 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. For each difference file, the number of pixels that differ in the comparison file from the reference file are also given. Clicking on one of the difference files displays its content in window 70 . In an illustration of FIG. 10 in the window 70 of the difference file 00018FOd.TIF is illustrated. 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.
  • In the difference 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 shown in red in the difference file (pixels 72 ). In the black / white representation according to FIG. 13, the pixels 71 , 72 are shown darker than the other pixels set in gray color.
  • FIG. 14 shows a further difference image which 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 due to a change in the characters at the edges of individual characters. The corresponding pixels are again shown blue (pixels 71 ) and red (pixels 72 ) in the original representation.
  • By viewing the corresponding colored representation on the screen 57 , 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.
  • Some functions and options of the computer program product according to the invention are explained in more detail below. In the preprocessing according to step S2 in FIG. 6, the pages of the comparison file and / or reference file can be cut if they do not match in format with the other file. This can be determined by selecting a predefined paper format or by entering appropriate size information. These sizes are pixel elements (pels = pixelelements). The size information is shown in inches for control purposes. With these size specifications, the width and the height of the paper as well as an offset in the X and Y directions can be specified.
  • Furthermore, 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 being entered in the window shown in FIG. 16 can. The direction (up, down, left, right) can also be selected.
  • In a preferred embodiment, when moving the comparison file, the reference file in one shown different color, so the user can see the two Align files as closely as possible can. Furthermore, turning the Image data of the comparison file in a predetermined direction be provided by a predetermined amount.
  • When looking at the content of a difference file, the distance between two pixels can be measured. The corresponding window is shown in FIG. 17, in which the distance in the horizontal and vertical directions is given in pixels (pel), inches and cm.
  • The standard color (print (ident.)), First comparison color (reference (track A)) and the second comparison color (comparison (track B)) can be set by the user in the window shown in FIG. 18. Here you can also set whether the TIFF files are saved uncompressed or compressed.
  • Other important functions can be set on the window shown in FIG. 19. Here you can select whether a log file is generated, whether difference images should not be saved, whether the comparison files should be deleted if there is no error and whether an additional difference log file is generated. In this embodiment, the log file has additional information and the difference log file only contains the file names of the difference files and the number of different pixels.
  • When comparing the comparison files with reference files described above, it is advisable to exclude certain areas from the comparison. For this purpose, up to seven fade-out windows can be activated, the position and size of which can be defined individually in the window shown in FIG. 20. Such areas include, for example, date variables, which are updated at the time of printing or screening and thus differ.
  • Furthermore, 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. 21. 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 . To the intermediate support 111, the various units for the electrophotographic process are grouped. 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 medium 110 . To remove the residual toner after development and transfer printing, a cleaning station 116 is provided, with a cleaning brush integrated therein with an 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 operation.
  • Furthermore, 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 feeding device 121 arranged downstream of the fixing station with guide rollers for feeding the recording medium 110 to an internal stacking device 122/1 or external to a arranged outside of the printing device staple or other post-processing means 122/2. Starting from an internal 123/1 or external 123/2 storage area, the tape-shaped recording medium 110 is fed via feed rollers 124 to a swiveling paper dividing device of the transfer station 115 .
  • The transport of the record carrier takes place via a transport device 125 assigned to the transfer printing station 115 in the form of conveyor belts 126 provided with pins, which, guided by drive shafts 127 , engage in the perforation on the edge of the record carrier 110 . In the housing area of the printing device in a receiving area for the internal supply stack 123/1 a turning device 128 is arranged with which the recording medium is turned over to the back-side printing, after printing the front side and the transfer station can be fed to 115 again.
  • The turning device 128 is connected to the fixing station 118 via a return channel 129 .
  • This electrographic printing device is suitable for printing on recording media with different bandwidths. For this purpose, 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 record carrier 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 guided 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 run this record carrier web twice through the transfer printing station 115 in such a way that the front is printed in each case. This is useful, for example, for 2-color printing (highlight color printing), whereby the base color (black) is printed on the first pass through the transfer printing station, the highlight color color from the other pass.
  • To check the printout on such a device, the program according to the invention has a special function which can be set using the window shown in FIG. 22. In this window, a page with the entire width of the transfer printing station 15 is shown under "page cropping". As explained above, this page can be divided into two tracks (Track A, Track B). The two webs are defined by the distance to the left edge of the entire page and its page width. You can also specify how much sheet there is between printing on a specific sheet on web A and printing on web B. In addition, it can be determined whether a single sheet mode (single), in which only one record carrier web is passed through the transfer printing station 15 , a double sheet mode, in which the paper web is passed through the transfer printing station 15 twice with a reversal to duplex printing, or whether there is a color mode in which the paper web is guided twice through the transfer station 15 with the same side and is printed with two different colors. You can also specify whether the front is printed on web A (track A) or on web B (track B). Once this information has been entered in full, the print image composed of two comparison files (excerpt files) with both color separations can be displayed on the screen in the case of a color print, so that the user can also check the complete print image. According to a preferred embodiment, 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.
  • If the printing device from FIG. 21 is used for duplex printing, ie with the paper web being turned over, 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 in a different color or a different brightness than the printed image the front is shown. The simultaneous display of the front and back enables the user to check that the printout is in register.
  • The two printed images of webs A and B can thus be combined with one another on the screen display. However, 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 printed images in the Two-color printing or duplex printing allows one in particular simple and quick visual check on this special printing device. This function can also applied regardless of comparison with a reference file become.
  • Another very advantageous function of the computer program according to the invention is referred to as statistical analysis. To explain this function, reference is made to the difference file shown in FIG. 14, in which only minor differences between the comparison file and the reference file are shown. It can often make sense that such minor differences are not considered errors. Here, the difference file is analyzed to determine whether the differences shown therein within predetermined sections exceed a predetermined threshold number of changed pixels. If this is not the case, then these sections with a few differing pixels are assessed as no difference. These sections are preferably rectangles 73 ( FIG. 24), the size of which can be specified by the user ( FIG. 23).
  • It can also be determined whether only pixels added to the reference file or only missing pixels compared to the reference file or all changing pixels are to be taken into account. During the analysis, the correspondingly changed pixels within each section or rectangle 73 are then counted. If their number is not greater than the threshold value, this section is assessed in such a way that there is no difference or no change in the pixels in this section. With this method, the entire area of the difference file is divided into corresponding sections and each section is assessed separately.
  • If the analysis of the entire difference file reveals that all sections or rectangles 73 are to be assessed as having no difference, 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.
  • With the computer program described above, a Print data stream, whose rasterized image data on pages one TIFF file each are mapped, with corresponding Compare reference files. Such a print data stream can span a few thousand pages. This procedure serves especially for testing newly developed or modified raster devices for rasterizing image data. With the method according to the invention and the corresponding Computer programs can process large amounts of data quickly be checked visually and corresponding errors on the Raster device are detected.
  • The invention can be briefly summarized as follows:
    The invention relates to a method, a computer program product and a device system for visually checking image data.
  • With the method according to the invention, 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 REFERENCES 1 high-performance printing system
    2 data network
    3 terminal
    3 a screen
    4 main frame
    4 a screen
    5 tape reader
    6 high performance printers
    7 printers
    8 print servers
    8 a screen
    9 archive servers
    9 a screen
    10 tape reader
    11 connection
    12 connection.
    13 printers
    14 printers
    14 a screen
    15 local network
    16 archive stores
    16 a screen
    16 b Appendix
    20 spoolers
    21 Administrator unit
    22 Spool file
    23 Archiving component
    24 workplace
    25 distribution module
    26 e-commerce module
    27 display module
    28 archiving system
    29 a Print production system
    29 b Print production system
    29 c print production system
    30 monitoring modules
    33 control system
    34 printers
    35 Print job manager
    36 control module
    37 Print production program
    38 print data stream converter
    39 grid arrangement
    40 archive
    41 display module
    42 a Display program
    42 b Display program
    43 grid arrangement.
    44 character generator
    45 photoconductor drum
    46 sheets of paper
    47 data memories
    48 BUC controllers
    49 Control panel
    50 units
    51 Print job generator
    52 grid arrangement
    53 printers
    54 TIFF generator
    55 Archive system
    56 comparison system
    57 screen
    58 input unit
    59 a comparison file
    59 a / 1 bitmap
    59 b Comparison file
    59 c comparison file
    60 a reference file
    60 a / 1 bitmap
    60 b reference file
    60 c reference file
    61 pixels
    62 pixels
    63 a difference file
    63 b difference file
    63 c difference file
    63 pixels
    64 pixels
    65 pixels
    66 pixels
    67 button
    68 windows
    69 windows
    70 windows
    71 pixels
    72 pixels
    73 cutout, rectangle
    110 record carriers
    111 intermediate supports
    112 charging device, charging corotron
    113 LED character generator, imaging device
    114 developer station
    115 transfer station
    116 cleaning station
    117 Unloading device, unloading corotron
    118 fuser
    119 fuser roller
    120 pressure roller
    121 Feed device with guide rollers
    122 storage space for stacks
    122/1 internal stacking means
    122/2 external stacker
    123/1 internal storage area, pile
    123/2 external storage region, Stack
    124 Paper divider with feed rollers
    125 Transport device
    126 conveyor belt
    127 drive shaft
    128 turning device
    129 return duct
    130 paper inlet channel
    131 paper outlet channel

Claims (19)

1. A method for visually checking image data by comparing at least one comparison file ( 59 a) with rastered image data with at least one reference file ( 60 a) with rastered image data, it being determined whether between the reference file ( 60 a) and the comparison file ( 59 a) there is a difference, and if a difference is found, at least one difference file ( 63 a) is created in which the difference is shown.
2. The method according to claim 1, characterized, that finding a difference by one Comparison of data units one to run the Process used computer system takes place.
3. The method according to claim 1 or 2, characterized in that to create the difference file ( 63 a), the comparison file ( 59 a) and the reference file ( 60 a) is compared page by page, pixels of the comparison file ( 59 a) with pixels of the reference file ( 60 a), which are arranged in the same position on the respective side, and the corresponding image points are set with a standard color in the difference file ( 63 a) if they are both in the comparison file ( 59 a) and in the reference file ( 60 a) are set, and are set with a first comparison color if they are only set in the reference file ( 60 a), and are set with a second comparison color if they are only set in the comparison file ( 59 a) ,
4. The method according to any one of claims 1 to 3, characterized in that with the creation of the difference file ( 63 a) a log file is created, in which information about the location of the / the differences (s) are stored and the number of differing Pixels can be saved. 5. The method according to claim 4, characterized in that the information about the location of the / the differences (s) are the respective side of the / the differences (s).
6. The method according to any one of claims 1 to 3, characterized in that for each pair of comparison file ( 59 a) and reference file ( 60 a) to be compared, a difference file ( 63 a) is created if there is a difference, and with the creation the difference file (63 a) in a log file have from the reference file (60 a) discriminating comparison file (59 a) and / or the differential files (63 a) and the number of differing pixels are stored.
7. The method according to any one of claims 1 to 6, characterized in that the pixels of the comparison file ( 59 a) or reference file ( 60 a) before determining a difference and before comparing by a predetermined amount in a predetermined direction with respect to their position be moved to one side.
8. The method according to any one of claims 1 to 7, characterized in that the pixels of the comparison file ( 59 a) or reference file ( 60 a) before determining a difference and comparing a rotation by a predetermined amount in a predetermined direction with respect to them Position on one side.
9. The method according to claim 7 or 8, characterized in that for moving or rotating the pixels, the pixels of the comparison file ( 59 a) and the reference file ( 60 a) are displayed on a computer screen in two different colors.
10. The method according to any one of claims 1 to 9, characterized, that predetermined areas of the comparison file at Compare with the reference file not taken into account become.
11. The method according to any one of claims 1 to 10, characterized in that the difference file is analyzed to determine whether the differences shown therein exceed a predetermined threshold number of changed pixels within predetermined sections ( 73 ) of the image represented by the difference file, and if not if so, the comparison is judged to have no difference.
12. The method according to claim 11, characterized in that the size of the predetermined cutouts ( 73 ) and the number of thresholds are adjustable.
13. The method according to claim 12, characterized, that the predetermined cutouts are rectangles.
14. The method according to any one of claims 1 to 13, characterized, that before finding a difference and that Compare the comparison file with a reference file the comparison file from two extract files is composed, each of the pixels of a Include data describing the color separation.
15. The method according to claim 14, characterized, that the data of the separation file, its color separation first is printed, corresponding to a paper shrinkage be mapped.
16. The method according to any one of claims 1 to 15, characterized in that a reference file with a plurality of pages or a plurality of reference files are used to test a raster device ( 52 ) for rastering image data by the image data on which the reference files are based with the Raster device ( 52 ) are rasterized and stored in one or more comparison files and then the comparison file (s) is / are automatically compared according to the method according to one of claims 1 to 12 with the reference file (s).
17. Computer program product that is loaded and running on a computer a procedure according to one of the causes previous claims.
18. Computer program product according to claim 17, which on a Disk is recorded.
19. Device system for visually checking image data with a comparison system ( 56 ) having a screen ( 57 ), a print job generator ( 51 ), a raster device ( 52 ), the computer program product according to claim 17 being stored and executable on the comparison system.
20. Device system according to claim 19, characterized in that the device system has a device ( 54 ) connected downstream of the raster device 52 for formatting the rastered image data into a standard picture format.
DE10132625A 2001-07-05 2001-07-05 Process, computer program product and device system for visually checking image data Withdrawn DE10132625A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10132625A DE10132625A1 (en) 2001-07-05 2001-07-05 Process, computer program product and device system for visually checking image data

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10132625A DE10132625A1 (en) 2001-07-05 2001-07-05 Process, computer program product and device system for visually checking image data
EP02743261A EP1405499A1 (en) 2001-07-05 2002-07-03 Method, computer program product and device system for visually checking image data
PCT/EP2002/007390 WO2003005701A1 (en) 2001-07-05 2002-07-03 Method, computer program product and device system for visually checking image data

Publications (1)

Publication Number Publication Date
DE10132625A1 true DE10132625A1 (en) 2003-01-23

Family

ID=7690723

Family Applications (1)

Application Number Title Priority Date Filing Date
DE10132625A Withdrawn DE10132625A1 (en) 2001-07-05 2001-07-05 Process, computer program product and device system for visually checking image data

Country Status (3)

Country Link
EP (1) EP1405499A1 (en)
DE (1) DE10132625A1 (en)
WO (1) WO2003005701A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1496681A1 (en) * 2003-07-11 2005-01-12 Axalto S.A. A method for printing an image on a support
DE102007015097A1 (en) * 2007-03-29 2008-10-02 Heidelberger Druckmaschinen Ag Colorimeter with coordinate adjustment
US10102223B2 (en) 2012-05-02 2018-10-16 Eyec Gmbh Apparatus and method for comparing two files containing graphics elements and text elements

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187376A (en) * 1990-12-20 1993-02-16 Toshiba Kikai Kabushiki Kaisha Print monitoring apparatus with data processing
DE19723369A1 (en) * 1997-06-04 1998-12-10 Bitex Gmbh Image identification method for detecting difference between two images
WO1999012337A2 (en) * 1997-08-29 1999-03-11 OCé PRINTING SYSTEMS GMBH Method and device for electronic archiving of a computer data flow
EP0771437B1 (en) * 1994-07-15 1999-07-07 Océ Printing Systems GmbH Multifunctional printing system of modular design
US5940584A (en) * 1994-03-11 1999-08-17 Oce Printing Systems Gmbh Method and apparatus for electronically filing documents prepared by a computer
DE19940879A1 (en) * 1999-08-27 2001-03-08 Innomess Elektronik Gmbh Device and procedure for comparison of a digitized print image with a reference image for automatic quality control so that if error values exceed a threshold value an alarm is generated to inform print machine operators

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9022710D0 (en) * 1990-10-18 1990-11-28 Crosfield Electronics Ltd Methods and apparatus for testing image processing apparatus
US5625766A (en) * 1995-05-11 1997-04-29 Creo Products Inc. Software based proofing method for double sided printing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187376A (en) * 1990-12-20 1993-02-16 Toshiba Kikai Kabushiki Kaisha Print monitoring apparatus with data processing
US5940584A (en) * 1994-03-11 1999-08-17 Oce Printing Systems Gmbh Method and apparatus for electronically filing documents prepared by a computer
EP0771437B1 (en) * 1994-07-15 1999-07-07 Océ Printing Systems GmbH Multifunctional printing system of modular design
DE19723369A1 (en) * 1997-06-04 1998-12-10 Bitex Gmbh Image identification method for detecting difference between two images
WO1999012337A2 (en) * 1997-08-29 1999-03-11 OCé PRINTING SYSTEMS GMBH Method and device for electronic archiving of a computer data flow
DE19940879A1 (en) * 1999-08-27 2001-03-08 Innomess Elektronik Gmbh Device and procedure for comparison of a digitized print image with a reference image for automatic quality control so that if error values exceed a threshold value an alarm is generated to inform print machine operators

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1496681A1 (en) * 2003-07-11 2005-01-12 Axalto S.A. A method for printing an image on a support
WO2005006731A2 (en) * 2003-07-11 2005-01-20 Axalto S.A. A method for checking the information to be printed on intermediate supports manufactured for printing an image on a final support
WO2005006731A3 (en) * 2003-07-11 2005-03-03 Axalto Sa A method for checking the information to be printed on intermediate supports manufactured for printing an image on a final support
DE102007015097A1 (en) * 2007-03-29 2008-10-02 Heidelberger Druckmaschinen Ag Colorimeter with coordinate adjustment
US10102223B2 (en) 2012-05-02 2018-10-16 Eyec Gmbh Apparatus and method for comparing two files containing graphics elements and text elements

Also Published As

Publication number Publication date
EP1405499A1 (en) 2004-04-07
WO2003005701A1 (en) 2003-01-16

Similar Documents

Publication Publication Date Title
US8390833B2 (en) Generating workflow data corresponding to process icons
US7180623B2 (en) Method and apparatus for print error recovery
US7612919B2 (en) Printing apparatus and control method
US6927865B1 (en) Information processing apparatus and method utilizing print previews, and computer-readable storage medium
KR100928747B1 (en) The information processing apparatus having a print preview feature,
CN100514274C (en) Printing control method and apparatus
JP4834256B2 (en) Information processing apparatus, print data generation method, print control program, and storage medium
EP1359514A2 (en) Printing of variable data with the aid of variants
CN100511028C (en) Image forming system and image forming apparatus
JP4532798B2 (en) Document processing apparatus and method
JP2004192248A (en) Document processor and document processing method
JP4785303B2 (en) Print control apparatus, print control method, and program
CN100401735C (en) Document processing method and apparatus
US8218190B2 (en) Document processing apparatus and method
EP1293930A2 (en) Information processing apparatus and method
CA2048577C (en) Electronic printing system for printing multiple up images
EP1257894B1 (en) Method and apparatus for tab printing
US8681367B2 (en) Print control method and apparatus
JP4298146B2 (en) Information processing apparatus and method for generating print data
JP2004164105A (en) Printing control program
JP2005311477A (en) Document processor and control method thereof, and computer program
US7969593B2 (en) Printing apparatus, control method therefor, job processing method, printing system, and program
US8014013B2 (en) Systems and methods for segmenting pages and changing settings for graphical elements in printing
CN102016784B (en) Print control apparatus and print control method
US7688459B2 (en) Document processing method

Legal Events

Date Code Title Description
8130 Withdrawal