JP2005059383A - Printing deviation detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a detecting accuracy of a printing deviation in printed matter which is printed and issued. <P>SOLUTION: A printing deviation detector 20 detects a reference mark M1 formed beforehand on a printing sheet from a read image in a CPU 21 and a printing mark M2 printed by a printer 10 if the image of a printed ticket surface printed by the printer 10 is read in an image reader 20a, and calculates an amount of the printing deviation based on the the detected positions of the detected reference mark and the printing mark. If this amount of the printed deviation falls within a tolerance range, the printed ticket surface is judged to be normal printing, while if the amount of the printed deviation is out of the tolerance range, the printing ticket surface is judged to be a printing error, and is discharged to a different sheet delivery tray. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a print misalignment detection apparatus that detects a print misalignment in a printed material.

  Conventionally, in a printing device that prints and issues securities such as bills and checks, the printing position is changed from the normal position that should be printed due to equipment factors such as printer conveyance failure, paper feed roller wear, registration roller failure, etc. There was a problem that it might shift.

  FIG. 14 is a diagram showing an example of a check printed ticket surface. As shown in FIG. 14, in the check, a printing standard that a region called “exchange box frame” must be provided at a predetermined distance from the paper edge at the upper right part of the ticket surface is defined by law. If printing misalignment occurs for the reason described above, the “exchange frame” area is not printed at a predetermined position.

In order to solve this problem, a reference image for detecting a printing misalignment is prepared in advance. A securities issuing device for sorting has been developed (see, for example, Patent Document 1). In this device, if the reference image is exactly the same as the actual ticket, the condition for detecting printing misalignment becomes very strict, so the thickness of the character font of the reference image is set to be thicker than the actual thickness of the character on the ticket. An allowable range of printing misalignment is set.
Japanese Patent Laid-Open No. 10-278394

  However, as described above, when setting the allowable range of print misalignment by setting the thickness of the character font of the reference image, if the character thickness is set thin and the condition for detecting print misalignment is strict, Even if there is a slight print misalignment that can be tolerated with the eyes of the user, or if there is a misalignment in reading the image even though there is no print misalignment, it is selected as an error. Therefore, if the thickness of the character is set thick and the print misalignment detection condition is relaxed, only dust and scratches can be detected. As described above, in the conventional printing apparatus, it is difficult to set the print misalignment detection condition, and the print misalignment cannot be detected in a fine unit, and thus appropriate sorting cannot be performed.

  In addition, when printing misalignment is detected in the printing apparatus, there are various restrictions on mounting various sensors for detecting misprinting in the printing apparatus, which cannot be realized by a simple method.

  The subject of this invention is improving the detection precision of the printing shift in printed matter.

  According to the first aspect of the present invention, a reference mark for detecting printing misalignment is provided in advance on the printing paper, and the printing mark for detecting the printing requirement and the printing position is printed on the printing paper by the printing apparatus. A print misalignment detection apparatus that detects a print misalignment in the printed material later, an image reading unit that reads an image of the printed material on which printing requirements and print marks are printed on the printing paper, and a reading that is read by the image reading unit A position detection unit that detects a position of the reference mark and the print mark from the image; and a print shift detection unit that detects a print shift in the printed material based on the detected position of the reference mark and the print mark. It is characterized by that.

  According to the first aspect of the present invention, the image of the printed matter is read, the reference mark and the print mark are detected from the read image, and the printing deviation is detected based on the detection position of each mark. A fine print misalignment amount can be calculated from the position information of the mark, and a print misalignment can be accurately detected even if it is a subtle misalignment. Therefore, it is possible to improve the detection accuracy of the printing blur in the printed matter.

  In the present embodiment, an image of a printed matter printed by a printing apparatus is read, and a reference mark previously provided on a printing paper and a printing mark printed by the printing apparatus are detected from the read image. The amount of printing deviation is calculated based on the detected position of the reference mark and the printed mark, and if the amount of printing deviation is outside the allowable range, the printed matter is determined as a printing error and is output to a different discharge tray from the printed matter that has been normally printed. An example of paper discharge will be described.

First, the configuration will be described.
FIG. 1 shows a print issuing system 100 configured to include a print misalignment detection apparatus 20 according to the present embodiment. As shown in FIG. 1, the print issuance system 100 includes a printing apparatus 10 and a print deviation detection apparatus 20. Note that a route R in FIG. 1 indicates a transport route for printing paper.

  In this embodiment, an example is described in which securities are printed and issued as printed matter. However, the printed matter is not particularly limited and may be other than securities. In particular, it is very effective to apply the present invention to printed matter such as various certificates such as resident's cards, official documents, and the like that cause trouble due to misprinting.

First, the printing apparatus 10 will be described.
The printing apparatus 10 includes a paper feeding unit 11 and a printer unit 12. The printing device 10 conveys printing paper accommodated in the paper feeding unit 11 to the printer unit 12, and prints printing requirements to be described on the bill face of the securities in the printer unit 12. It prints on paper.

  FIG. 2 shows an example of print paper for securities accommodated in the paper supply unit 11. Fig. 2 (a) is a single-sided printing paper used when printing securities one by one. Fig. 2 (b) shows two securities at the same time for faster printing. This is a two-sided printing paper used for printing. These printing papers are composed of a white background copy portion and a book portion on which a tint block pattern is printed in advance, and each printing paper has an identification code C for identifying a paper type such as a check or a bill. Pre-formed.

  The identification code C is a code for OCR (Optical character recognition), and includes two black squares for code detection and an identification number indicating a paper type sandwiched between the two squares. Of the two black squares, the upper square is used as a reference mark M1 for detecting a printing misalignment.

  In this embodiment, an example in which the identification code C and the reference mark M1 are used together will be described. However, the reference mark M1 may be provided separately from the identification code C. Further, although the reference mark M1 is an example of a substantially black square, the shape and color of the mark are not particularly limited as long as the mark image can be detected in the image read from the printed ticket surface. The same applies to print marks described later.

In FIG. 3, the sheet surface requirement is printed in order to distinguish it from the printing sheet on which the sheet surface requirement is printed on the one-sided printing sheet shown in FIG. An example of a print sheet is referred to as a print ticket surface (that is, a printed matter). As shown in FIG. 3, the card surface requirements are printed on the copy portion and the book portion, and a print mark M2 for detecting a printing misalignment is printed on the upper left portion as compared with the reference mark M1.
In this way, the printed ticket surface on which the ticket surface requirement and the print mark M <b> 2 are printed in the printer unit 12 of the printing apparatus 10 is conveyed toward the printing deviation detection device 20.

Next, the print misalignment detection apparatus 20 will be described.
As shown in FIG. 1, the print misalignment detection device 20 includes an image reading unit 20 a (a circled portion in FIG. 1) and a paper discharge unit 20 b, and an image of a printed voucher printed by the printing device 10. Is read by the image reading unit 20a, and a printing deviation is detected from the image, and a printing voucher surface having a printing error and a normal printing voucher surface are selected and discharged to the paper discharge unit 20b.

FIG. 4 is a diagram illustrating an internal configuration of the image reading unit 20a.
As shown in FIG. 4, the image reading unit 20 a is an image reading unit, and includes a sensor a <b> 1 that detects passage of a print ticket, an image sensor a <b> 2 that reads an image, an image processing board a <b> 3 that performs image signal processing, and shading. It consists of a sheet a4. The shading sheet a4 is formed at a position facing the image sensor a2 in the conveyance path of the print ticket surface in order to detect the paper edge portion of the print ticket surface in the read image.

  At the time of image reading, when the sensor a1 detects that the printed ticket surface is conveyed, the image sensor a2 performs image reading of the printed ticket surface, and the read image signal is output to the image processing board a3. Then, when various image processing is performed on the image signal in the image processing board a3 and converted into digital image data, the image data is output to a control system described later.

  The paper discharge unit 20b is configured to include a plurality of paper discharge trays such as a tray that accommodates a print ticket surface that is determined to have been printed normally and a tray that accommodates a print ticket surface that is determined to have a printing error. .

Next, the internal configuration of the print misalignment detection apparatus 20 will be described with reference to FIG.
As shown in FIG. 5, the print misalignment detection apparatus 20 includes a CPU (Central Processing Unit) 21, an input unit 22, a display unit 23, a communication unit 24, a RAM (Random Access Memory) 25, a storage unit 26, and an image reading unit 20a. , I / F (Interface) 27, and is connected to the printing apparatus 10 via the I / F 27. Hereinafter, each component will be described, but since the image reading unit 20a has been described above, the description thereof is omitted here.

  The CPU 21 stores, in addition to the system program stored in the storage unit 26, a ticket surface determination processing program (see FIG. 9) according to the present invention, a print deviation detection processing program (see FIG. 10) included in the ticket surface determination processing program, and the like. The processing operation is comprehensively controlled in cooperation with the program.

  The CPU 21 performs a print deviation detection process in the ticket face determination process, and performs image analysis on the image of the print ticket face read by the image reading unit 20a to detect a print deviation. Then, it is determined whether or not the detected printing deviation of the print ticket surface is within the allowable range. If it is determined to be within the allowable range, the print ticket surface is determined to be normal printing, and if it is determined to be out of the allowable range, the print ticket surface is determined. Is determined as a printing error, and the printed ticket surface is sorted into a normal printing tray and a printing error tray and discharged.

  In the print misalignment detection process, the edge of the sheet of paper is detected from the read image of the print ticket according to the print misalignment detection parameters stored in the setting file 261 described later, and the inclination of the edge is detected. At this time, if the inclination is outside the allowable range, the image area in the detection execution range set in the setting file 261 is cut out from the read image, and the cut out image area is rotationally corrected by the amount of the edge inclination. Next, when the print mark M2 and the reference mark M1 are detected within the detection execution range and the position coordinate values are acquired, the detected positions of the print mark M2 and the reference mark M1, the print mark set in the setting file 261, and The amount of printing deviation is calculated by comparing with the normal position of the reference mark.

  That is, by cooperation between each program and the CPU 21, it is possible to realize position detection means, print deviation detection means, determination means, edge detection means, inclination detection means, and correction means.

  The input unit 22 includes a keyboard having numeric keys, character keys, and various function keys, and outputs an operation signal corresponding to the operated key to the CPU 11. In addition, it is good also as a structure provided with pointing devices, such as a mouse | mouth and the touchscreen comprised integrally with the display part 23. FIG.

  The display unit 23 is composed of an LCD (Liquid Crystal Display) or the like, and displays various display information such as a processing result by the CPU 21, an operation screen, and a screen for notifying a detection result of printing deviation.

  The communication unit 24 includes a communication interface such as a network interface card or a modem, and transmits / receives information to / from an external device on the communication network.

  The RAM 25 forms a work area for temporarily storing various programs executed by the CPU 21 and data related to these programs.

  The storage unit 26 is configured by a magnetic or optical recording medium or a semiconductor memory, and stores a sheet surface determination processing program, a printing deviation detection processing program, data processed by each program, and the like in addition to the system program.

The storage unit 26 stores therein a setting file 261 and a print deviation detection history file 262.
The setting file 261 is a file in which various detection parameters for detecting printing misalignment are stored. In the setting file 261, as shown in FIG. 6, the standard position 1a of the reference mark, the normal position 1b of the print mark, the allowable range 1c of printing deviation, the edge of the printing paper, and the like for each type of securities such as checks and bills. Stored are various detection parameter items such as a detection range 1d, a print sheet inclination detection parameter 1e, a detection execution range 1f, and a mark detection parameter 1g.

Hereinafter, each detection parameter will be described.
The normal position 1a of the reference mark stores the coordinate value of the position coordinate of the reference mark on the printed ticket surface printed at the normal printing position (hereinafter referred to as the normal position). For example, when the read image of the printed ticket printed at the regular position is an image as shown in FIG. 7, the coordinate value “(S1x, S1y) = (26) of the reference mark PreM1 with the upper left end point of the read image as the origin. 528) "is stored in the normal position 1a of the reference mark. Similarly, in the normal position 1b of the print mark, the position coordinate value of the print mark on the printed ticket surface printed at the normal position is stored. In the example of FIG. 7, the coordinate value “( S2x, S2y) = (52, 40) "is stored.

  In the allowable range 1c of printing misalignment, a threshold value for determining a printing ticket surface as a printing error based on the calculated amount of printing misalignment, for example, “(x, y) = (8, 2)” or the like is stored. A deviation up to ± 8 and a deviation of up to ± 2 in the y direction are acceptable. Further, the edge detection range 1d of the printing paper includes coordinate values indicating image areas for detecting the edge of the paper on the printed voucher when printing deviation is detected, for example, “EDGEX: 72-1655, EDGEY: 100-190. ", Etc. are stored, indicating that edge detection is performed in the range of 72 to 1655 in the x direction and in the range of 100 to 190 in the y direction.

  The inclination detection parameter 1e stores a threshold value for detecting the inclination of the print ticket surface, for example, “x = 1500, y = 15”. If the inclination of the print ticket surface exceeds the inclination 15/1500, the print ticket surface is inclined. It is determined and rotation correction is performed. The detection execution range 1f stores coordinate values indicating the range of the image area in which the printing misalignment is detected, that is, the print mark M2 and the reference mark M1 are detected. For example, “TURNX = 72-1655, TURNY = 100− In the case of 280 ″, print misregistration is detected only in the image region in the range of x direction 72 to 1655 and y direction of 100 to 280.

  The mark detection parameter 1g stores parameter data indicating conditions for detecting the reference mark M1 and the print mark M2 from the print ticket surface. For example, when “x = 2, y = 20” is indicated, When an image area in which 20 consecutive dots are continuous for 2 dots or more is detected, the image area is detected as an image of a reference mark or a print mark.

  The print misalignment detection history file 262 is a file in which a history of print misalignment detection results is stored. In the print misalignment detection history file 262, as shown in FIG. 8, the detection date 2a (for example, “2003/04/08 10:38:41” indicating year / month / day / hour / minute / second etc.) The detected position 2b of the detected print mark (for example, “(I2x, I2y) = (190, 201)” indicating the position coordinates), the detection position 2c of the reference mark (for example, “(I1x, I1y indicating the position coordinates) ) = (164, 691) ”, etc.), a displacement amount 2d of the print displacement calculated from the print mark and the reference mark (for example,“ (Dx, Dy) = (0, − 2) "etc.), each item information of the image data 2d (for example," error01.img "etc.) in which the file name of the read image of the printed ticket is stored when it is determined as a printing error is stored.

  That is, the storage unit 26 can realize normal position storage means, allowable range storage means, and history storage means.

Next, the operation in the present embodiment will be described.
FIG. 9 is a flowchart for explaining a bill surface determination process executed by the print misalignment detection apparatus 20. This ticket face determination process is a process of detecting a printing deviation on the printing ticket face of the securities printed and issued by the printing apparatus 10 and selecting a normal note face and a printing error ticket face based on the printing deviation amount.

  In the ticket face determination process shown in FIG. 9, first, when a ticket face requirement is printed on the printing paper in the printing apparatus 10 (step S1), the printing deviation detection apparatus 20 starts a printing deviation detection program for detecting a printing deviation ( Step S2).

  Next, when the printing voucher printed and issued in the printing apparatus 10 is conveyed to the printing misalignment detection apparatus 10 and it is detected that the printing voucher is conveyed by the sensor a1 of the image reading unit 20a, the printing voucher is detected by the image sensor a2. Image reading is started, and image data is generated on the image processing board a3 (step S3).

  When the image reading is started, the CPU 21 acquires various detection parameters necessary for print misalignment detection from the setting file 261 (step S4), and proceeds to print misalignment detection processing in step S5.

The print misalignment detection process will be described with reference to FIG.
In the print misalignment detection process shown in FIG. 10, first, the CPU 21 determines whether or not the read image data of the print ticket surface has been normally acquired from the image reading unit 20a (step S101). If the read image data is not acquired (step S101; N), it is determined that a printing error has occurred in the printing apparatus 10, and instruction information for instructing to stop the printing operation is output to the printing apparatus 10. Then, when the printing operation is stopped in the printing apparatus 10 (step S102), this process is terminated. On the other hand, when the read image data of the print ticket surface is normally acquired (step S101; Y), the paper edge of the print ticket surface is detected from the read image acquired by the CPU 21 (step S103).

FIG. 11 shows an example of a read image.
Since the image reading unit 20a is provided with the shading sheet a4, as shown in FIG. 11, the shadow of the sheet on the printed ticket surface appears as a black line on the read image. Therefore, based on the edge detection range parameters acquired from the setting file 261, an image region in which black dots are continuous in a line shape within the edge detection range is detected as a paper edge portion of the print ticket surface. In the read image shown in FIG. 11, the upper left end point of the read image is set as the origin, and the position of each dot constituting the image is indicated by coordinates.

  When the edge of the paper on the printed ticket surface is detected, the inclination is calculated from the dots constituting the detected edge, and the inclination of the printed ticket surface is detected (step S104). Then, the calculated inclination is compared with the inclination detection parameter acquired from the setting file 261, and the inclination of the printing paper is within an allowable range depending on whether the calculated inclination exceeds the inclination calculated from the inclination detection parameter. It is determined whether it is within (step S105). For example, when the inclination detection parameter is (x, y) = (15, 1500) and the detected edge has an inclination of 1000 dots in the x direction and 12 dots in the y direction, the inclination calculated from the inclination detection parameter Is 10/1000, and the slope of the edge is 12/1000, so that it is determined that it is out of the allowable range.

  When it is determined that the inclination of the print ticket surface is outside the allowable range (step S105; N), based on the detection execution range parameter acquired from the setting file 262, an image area within the detection execution range is cut out, The rotation is corrected by the angle at which the cut out image area is inclined (step S106). For example, when the detection execution range is set to TURNX = 72-280 and TURNY = 100-1655, as shown in FIG. 12, the x direction is in the range of 72 to 280 and the y direction is in the range of 100 to 1655. The area is cut out and only the cut out image area is rotationally corrected. After the rotation correction, the process proceeds to step S107.

  On the other hand, when it is determined that the inclination of the printing paper is within the allowable range (step S105; Y), the process proceeds to step S107, and the detection is performed based on the parameter of the detection execution range acquired from the setting file 262. The print mark M2 is detected in the image area within the execution range. That is, as shown in FIG. 12, an image area within the detection execution range is cut out, and mark detection is executed within the image area.

  The print mark M2 is detected according to the mark detection parameter acquired from the setting file 262. For example, when the mark detection parameter is set to (x, y) = (2, 20), as shown in FIG. 13, 20 or more rows in the x direction are continuous rows of black dots in the y direction. The detected image area is detected as a print mark. Such a detection method is because, as shown in FIG. 13, when a mark that appears to be a regular square to the human eye is enlarged, a regular square is not necessarily formed, and some dots are missing. This is because the surface is unevenly formed due to excessive addition. By performing the mark detection by the detection method as described above, it is possible to accurately detect the print mark M2 even if some noise is generated.

  When the print mark M2 is detected, the position coordinate values (I2x, I2y) are stored in the print misalignment detection history file 262, and then the reference mark M1 is detected from the image area cut out in the detection execution range ( Step S108). The detection of the reference mark M1 is started from a position separated from the detection position of the print mark M2 by a predetermined distance so that the print mark M2 is not erroneously detected, and is detected according to the mark detection parameter similarly to the print mark M1. . The detected position coordinate values (I1x, I1y) of the reference mark M1 are stored in the print misalignment detection history file 262.

In this manner, when the positions of the print mark M2 and the reference mark M1 are detected from the read image, a deviation amount from the normal position is calculated based on the detected positions of the marks M1 and M2 (step S109).
First, from the coordinate values of the normal position (S1x, S1y) of the reference mark PreM1 and the normal position (S2x, S2y) of the print mark PreM2 acquired from the setting file 262 during normal printing, the x direction of each mark PreM1, PreM2 and The position difference (Sx, Sy) in the y direction is calculated by the following equations 1 and 2.
Difference in x direction Sx = S1x−S2x (1)
Difference in y direction Sy = S1y−S2y (2)

Next, the position coordinates of the reference mark M1 and the print mark M2 detected from the read image are read from the print misalignment detection history file 262, and the difference between the positions of the marks M1 and M2 in the x and y directions (Ix, Iy ) Is calculated by the following formulas 3 and 4.
Difference in x direction Ix = I1x−I2x (3)
Difference in y direction Iy = I1y−I2y (4)

Then, from the difference between the positions (Sx, Sy) of the marks PreM1 and PreM2 during normal printing and the difference (Ix, Iy) between the positions of the marks M1 and M2 in the read image, the x direction and the y direction from the normal position. The amount of deviation (Dx, Dy) is calculated by the following equations 5 and 6.
Deviation amount Dx = Ix−Sx in the x direction (5)
Deviation amount in the y direction Dy = Iy−Sy (6)

When the deviation amounts (Dx, Dy) are calculated, the process proceeds to step S6 shown in FIG.
In step S6, the parameter of the allowable range of printing deviation acquired from the setting file 261 is compared with the calculated deviation amount to determine whether the printing deviation is within the allowable range. If the print deviation exceeds the allowable range in either the x direction or the y direction, it is determined that the print deviation exceeds the allowable range. For example, when the allowable range of printing deviation is set to ± 8 in the x direction and ± 2 in the y direction, and the calculated deviation amount is (Dx, Dy) = (0, −3), the y direction is Since the allowable range is exceeded, it is determined that the printing misalignment is outside the allowable range.

  If it is determined that the print misalignment exceeds the allowable range (step S6; N), the print ticket surface on which this print misalignment has been detected is determined as a print error, and the print ticket surface is free of print errors in the paper discharge unit 20b. The paper is discharged to a paper tray (step S7). At this time, a message notifying that a printing error has occurred due to printing misalignment is displayed on the display unit 23.

  Next, the read image data of the print ticket face determined to be a printing error is stored in the storage unit 26, and the file name of the image data is stored in the print deviation detection history file 262 (step S8). When the print misregistration detection history is stored, the reissue processing of the securities corresponding to the error is started (step S9), and the process returns to step S2 to repeat the detection of the print misalignment for the reissued print ticket face.

  On the other hand, if the printing misalignment is within the allowable range (step S6; Y), it is determined that the print ticket surface from which the misprinting has been detected is normal printing, and the print ticket surface is ejected by the paper ejection unit 20b for normal printing. The sheet is discharged onto the tray (step S10), and this process is terminated.

  As described above, after printing by the printing apparatus 10, the image on the printed ticket surface is read, and the position of the reference mark M1 printed on the printing paper in advance and the position of the print mark M2 printed at the time of printing are detected and set. Since the print misalignment amount is calculated from the normal positions of the reference mark PreM1 and the print mark PreM2 stored in the file 261 and the reference mark and print mark detection position detected from the read image, there is a subtle misalignment amount. Also, it is possible to accurately detect printing misalignment. If the calculated printing deviation amount is within the allowable range, it is determined that the print ticket surface is normal printing, and if the printing deviation amount is outside the allowable range, the printing ticket surface is determined as a printing error and discharged to a different discharge tray. Therefore, appropriate selection can be performed by setting an allowable range according to the user's request.

  Accordingly, it is possible to improve the accuracy of detecting a printing deviation in a printed material that has been printed and issued. In particular, it is very effective to detect printing misalignment accurately and finely in printed matter with high added value, such as the above-mentioned securities such as checks.

  Further, when the positions of the reference mark M1 and the print mark M2 are detected from the read image on the print ticket surface, the detection is performed only in the image area within the detection execution range including the image of the reference mark M1 and the print mark M2. Detection can be performed more efficiently and in a shorter time than when mark detection is performed on the entire image.

  Also, when detecting printing misalignment, the edge portion of the paper is detected from the read image of the printing ticket surface, the inclination of the printing ticket surface is detected from the edge portion, and the image is rotationally corrected by the inclination amount. It is possible to prevent erroneously detecting a printing voucher face that has been inclined as a printing deviation, and to further improve the accuracy of detecting a printing deviation. Further, at the time of rotation correction, rotation correction is performed only on the image area within the detection execution range including the images of the reference mark M1 and the print mark M2, so that correction can be performed in a shorter time than rotation correction on the entire read image. it can.

  Since the printing ticket surface is successively conveyed from the printing apparatus 10, it is possible to improve the detection accuracy of printing deviation while maintaining high-speed printing by reducing the time required for detecting printing deviation as described above. It becomes possible.

  Further, various data such as the position coordinates of the detected reference mark M1 and the print mark M2, the calculated printing deviation amount, and the image data of the read image are stored in the printing deviation detection history file 262 as the detection result of the printing deviation. Therefore, the operator can check the history of detection results of printing misalignment at any time.

It is a figure which shows the system configuration | structure of the printing issue system 100 containing the printing misalignment detection apparatus 20 in embodiment to which this invention is applied. It is a figure which shows the example of the printing paper of securities. It is a figure which shows the printing paper on which the ticket surface requirement was printed. 2 is a diagram illustrating an internal configuration of an image reading unit 20a of a print misalignment detection apparatus 20. FIG. 2 is a diagram illustrating an internal configuration of a print misalignment detection apparatus 20. FIG. 6 is a diagram illustrating a data configuration example of a setting file 261. FIG. It is a figure which shows the read image of the printing paper in which the ticket surface requirement was printed in the regular position. 6 is a diagram illustrating a data configuration example of a print misalignment detection history file 262. FIG. 5 is a flowchart for explaining a ticket face determination process executed by the print misalignment detection apparatus 20. 4 is a flowchart for explaining print misalignment detection processing executed by the print misalignment detection apparatus 20. It is a figure which shows the read image of the printed ticket surface actually printed. It is a figure which shows a mode that an image area | region is cut out in the set detection execution range. It is a figure explaining the detection method of a mark. It is a figure explaining the printing shift which arises in the conventional printing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Print issuing system 10 Printing apparatus 11 Paper supply part 12 Printer part 20 Printing misalignment detection apparatus 20a Image reading part a1 Sensor a2 Image sensor a3 Image processing board a4 Shading sheet 20b Paper discharge part 21 CPU
22 Input unit 23 Display unit 24 Communication unit 25 RAM
26 Storage Unit 261 Setting File 262 Print Misalignment Detection History File 27 I / F
PreM1 Normal position reference mark PreM2 Normal position print mark M1 Reference mark detected from the read image M2 Print mark detected from the read image

Claims (7)

A reference mark for detecting a printing misalignment is provided in advance on the printing paper, and after the printing mark for detecting the printing requirements and the printing position is printed on the printing paper by the printing apparatus, the printing misalignment in the printed matter is detected. A printing misalignment detection device,
Image reading means for reading an image of a printed matter on which printing requirements and printing marks are printed on the printing paper;
Position detection means for detecting the position of the reference mark and the print mark from the read image read by the image reading means;
A print misalignment detecting means for detecting a print misalignment in the printed material based on the detected reference mark and the detected position of the print mark;
A printing misalignment detection apparatus comprising:   The print misalignment detection apparatus according to claim 1, wherein the position detection unit cuts out an image area including a reference mark and a print mark, and detects the reference mark and the print mark in the cut-out image area. . A normal position storage means for storing a reference mark and a normal position of the print mark when printing is performed at a normal print position;
The printing misalignment detecting unit compares the reference mark and the detected position of the print mark detected by the position detecting unit with the normal position of the reference mark and the print mark stored in the normal position storing unit, 3. A print misalignment detection apparatus according to claim 1, wherein a print misalignment from the printer is detected. Tolerance storage means for storing the tolerance of printing misalignment;
A determination unit that determines, when the printing deviation detected by the printing deviation detection unit exceeds the allowable range of printing deviation stored in the allowable range storage unit, as a printing error for the printed matter in which the printing deviation is detected;
The printing misalignment detection apparatus according to any one of claims 1 to 3, further comprising: Edge detecting means for detecting the edge of the paper of the printed material from the read image read by the image reading means;
Inclination detecting means for detecting the inclination of the printed matter from the edge of the paper of the printed matter detected by the edge detecting means;
Correction means for rotationally correcting the read image by the amount of inclination detected by the inclination detection means;
The printing misalignment detection apparatus according to any one of claims 1 to 4, further comprising:   The print deviation detection apparatus according to claim 5, wherein the correction unit cuts out an image area including a reference mark and a print mark from the read image, and performs rotation correction on the cut-out image area.   The print misalignment detection apparatus according to any one of claims 1 to 6, further comprising a history storage unit that stores a history of a print misalignment detection result by the print misalignment detection unit.

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