Image judgment system and image forming device

Abstract

To efficiently and quickly determine an image quality state and grasp a symptom that a user feels is a problem.SOLUTION: An image determination system includes an image forming apparatus and an information processing apparatus. The image forming apparatus prints a standard document including a pattern image. The image forming apparatus prints a check area including a check item of the image quality of a printed matter, within the standard document. The image forming apparatus reads the printed standard document and generates standard document data. The image forming apparatus transmits the generated standard document data to the image processing apparatus. The image processing apparatus recognizes the check item selected in the check area, based on the received standard document data.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to an image determination system that prints an original for image quality determination (diagnosis) and determines the state of image quality based on image data of the original, and also to an image forming apparatus that prints the original for image quality determination. [Background technology]

[0002] In image forming devices, changes in image quality may occur over the course of use. The symptoms that appear due to changes in image quality vary, and differ from device to device (individual). Furthermore, there are various causes for changes in image quality. In order to confirm, reduce, and improve noticeable symptoms (problems), an image (test chart) may be printed to determine the current state of image quality of the image forming device.

[0003] Patent Document 1 describes a system that includes a server and an image forming device, and analyzes an output image to diagnose the image forming device. Specifically, the image forming device analyzes the image features of each page included in the job during image formation for the job, associates the analyzed image features with each page, and stores them. During diagnosis of the image forming device, the image forming device accepts a selection from a user of a page included in the job in which an abnormality has occurred in the output image as a result of image processing, selects one or more charts from a plurality of diagnostic charts using the image features associated with the selected page, outputs the selected chart, receives from the user whether an abnormality has occurred in the output image of the output chart, reads the output image of the chart in which an abnormality has occurred, and transmits the read image of the chart to the server. The server analyzes the image of the chart and estimates the state of the image forming device. Attempts to reduce the number of printed test charts (Patent Document 1: Claim 1, see

[0008] ). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-167302 A Summary of the Invention [Problem to be solved by the invention]

[0005] Image forming devices are sometimes installed in companies, offices, and government offices. A user (customer) may enter into a maintenance contract with a maintenance company for the image forming device used for business purposes. Conventionally, if a user feels there is a problem with the image quality, the user contacts the maintenance company. Upon receiving this contact, a maintenance person (serviceman) with specialized knowledge is dispatched. The serviceman diagnoses the image forming device and, if necessary, performs repair work such as part replacement.

[0006] In recent years, as described in Patent Document 1, there are cases where it is confirmed remotely whether there is a problem with image quality and what symptoms (problems) are actually occurring. For example, an image forming device prints a specified printout, image data of the printout is sent to a server, and the server performs diagnosis based on the image data. Image quality problems appearing in the printout can be confirmed in advance before a service technician visits. For problems confirmed remotely, the service technician can prepare parts necessary for repair before the visit. The service technician brings the prepared parts with him when he visits.

[0007] However, the symptoms that the user feels are problematic (symptoms of concern) may not appear on the printed materials used for diagnosis. For example, the symptoms of concern may not always occur. The service technician may only be able to identify the user's concerns after talking to the user and listening to what the user has to say. Furthermore, if the service technician has not brought the parts to improve the symptoms of concern with him / her, he / she must return to the company to get the parts or have them ordered. This lengthens the time it takes to resolve the symptoms of concern. There is a problem in that even if the image quality is diagnosed remotely in advance, it may not be possible to shorten the time that the image quality is problematic.

[0008] The system described in Patent Document 1 estimates the state of the image forming device based on image data of a diagnostic chart. However, the system described in Patent Document 1 cannot fully grasp the symptoms that the user feels are problematic. Therefore, the technology described in Patent Document 1 cannot solve the above problem.

[0009] In consideration of the above problems, the present invention makes it possible to simultaneously obtain image data for judging image quality and information indicating symptoms that the user is concerned about, thereby efficiently and quickly judging the state of image quality and understanding the symptoms that the user is concerned about. [Means for solving the problem]

[0010] The image assessment system according to the present invention includes an image forming device and an information processing device. The image forming device prints a standard document including a pattern image for assessing the state of image quality in printing. The image forming device prints a check area including check items for the image quality of a printed matter within the standard document. The image forming device reads the printed standard document and generates standard document data which is image data of the standard document. The image forming device transmits the generated standard document data to the information processing device. The information processing device receives the standard document data. The information processing device recognizes the check items selected in the check area based on the received standard document data. Effect of the Invention

[0011] According to the present invention, the information processing device can simultaneously obtain image data for image quality assessment and information indicating symptoms of concern to the user, and can efficiently and quickly assess the state of image quality while grasping the user's concerns about image quality. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram illustrating an example of an image assessment system according to an embodiment. [Diagram 2] FIG. 1 illustrates an example of an image forming apparatus according to an embodiment. [Diagram 3] FIG. 1 illustrates an example of an image forming apparatus according to an embodiment. [Figure 4] FIG. 1 is a diagram illustrating an example of an information processing apparatus according to an embodiment. [Diagram 5] FIG. 4 is a diagram illustrating an example of a process performed by the image forming apparatus according to the embodiment. [Figure 6] FIG. 2 is a diagram showing an example of a standard document according to the embodiment; [Figure 7] FIG. 13 is a diagram illustrating an example of a check region according to the embodiment. [Figure 8] FIG. 4 is a diagram illustrating an example of processing of the information processing device according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an image assessment system 100 and an image forming apparatus 1 according to an embodiment will be described with reference to Fig. 1 to Fig. 8. The elements of the configuration, arrangement, and the like described in the description of the present embodiment do not limit the scope of the invention and are merely illustrative examples.

[0014] (Image assessment system 100) An example of an image assessment system 100 according to an embodiment will be described with reference to Fig. 1. Fig. 1 is a diagram showing an example of an image assessment system 100 according to an embodiment.

[0015] The image assessment system 100 includes at least one image forming device 1 and at least one information processing device 2. The image assessment system 100 may include a plurality of information processing devices 2. Also, as shown in FIG. 1, the image assessment system 100 may include a plurality of image forming devices 1. The image forming device 1 and the information processing device 2 are communicatively connected via a wireless or wired communication network. Communication can be performed between the image forming device 1 and the information processing device 2.

[0016] The image forming apparatus 1 is a printing device such as a multifunction device or a printer. The information processing device 2 is a computer. The information processing device 2 is, for example, a server. The information processing device 2 can collect data from the image forming apparatus 1. For example, the information processing device 2 can collect image data from the image forming apparatus 1 and determine the state of image quality based on the image data.

[0017] (Image forming device 1) Next, an example of the image forming apparatus 1 according to the embodiment will be described with reference to Fig. 2 and Fig. 3. Fig. 2 and Fig. 3 are diagrams showing an example of the image forming apparatus 1 according to the embodiment. In the following, an example in which the image forming apparatus 1 is a multifunction peripheral will be described.

[0018] 2, the image forming apparatus 1 includes a control unit 10, a storage unit 11, and an operation panel 12. Furthermore, as shown in FIGS. 1 and 2, the image forming apparatus 1 includes a document transport unit 13, a scanner unit 14 (image reading unit), a print control unit 15 (engine control unit), and a printer unit 16.

[0019] The control unit 10 includes a control circuit 10a, an image data generation circuit 10b, an image processing circuit 10c, and a communication circuit unit 10d. For example, the control unit 10 is a board including circuits and elements. The control circuit 10a performs processing and calculations related to jobs. For example, the control circuit 10a is a CPU. The image data generation circuit 10b processes an analog image signal output by the image sensor 14b of the scanner unit 14 after reading a document. For example, the image data generation circuit 10b includes an A / D conversion circuit. Based on the analog image signal, the image data generation circuit 10b generates image data of the read document.

[0020] The image processing circuit 10c is an integrated circuit for image processing. For example, the image processing circuit 10c is an ASIC. The image processing circuit 10c performs image processing of image data. For example, the image processing circuit 10c generates image data for printing. The image processing circuit 10c can also generate files containing image data. The communication circuit unit 10d includes a communication control circuit and a communication memory. The communication control circuit controls communication based on communication software stored in the communication memory. The communication circuit unit 10d communicates with the information processing device 2. Note that the communication circuit unit 10d can also communicate with computers (PCs, servers) other than the information processing device 2.

[0021] The image forming apparatus 1 includes a RAM, a ROM, and a storage as a memory unit 11. The storage is either an HDD or an SSD, or both. Based on the programs and data in the memory unit 11, the control unit 10 controls each unit.

[0022] The operation panel 12 accepts setting operations by the user. The operation panel 12 includes a display panel 12a, a touch panel 12b, and hard keys 12c. The control unit 10 displays messages, setting screens, and operation images on the display panel 12a. For example, the operation images are buttons, keys, and tabs. Based on the output of the touch panel 12b, the control unit 10 recognizes the operation image that has been operated. The hard keys 12c include a start key and a numeric keypad. The touch panel 12b and the hard keys 12c accept setting operations (operations related to jobs) by the user. Based on the output of the operation panel 12, the control unit 10 recognizes the setting contents.

[0023] The document transport unit 13 transports the set document toward the reading glass 14a (first contact glass). The scanner unit 14 includes an image sensor 14b and a lamp 14c. The scanner unit 14 reads the document being transported. The image reading device can also read a document set on a document table 14d (second contact glass). The scanner unit 14 reads the document and outputs an analog image signal. The image data generation circuit 10b converts the analog image signal and generates document image data.

[0024] Printer unit 16 includes paper feed unit 16a, first paper transport unit 16b, second paper transport unit 16c, image forming unit 16d, and fixing unit 16e. Print control unit 15 includes a print control circuit (engine CPU) and print control memory (engine memory). Based on instructions from control unit 10 and the programs and data stored in the print control memory, the print control circuit controls the operation of printer unit 16 and the transport of paper. Print control unit 15 controls the operation of paper feed unit 16a, first paper transport unit 16b, second paper transport unit 16c, image forming unit 16d, and fixing unit 16e.

[0025] The paper feed unit 16a supplies paper. The paper feed unit 16a includes a paper cassette 16f and a paper feed roller 16g. The paper cassette 16f stores paper (sheets). The paper feed roller 16g sends out the paper. During a print job, the print control circuit 15a causes one of the paper feed units 16a to supply paper. The first paper transport unit 16b includes a first paper transport path 16h. The first paper transport unit 16b includes multiple guide plates. The paper passes through a path defined by the guide plates. The first paper transport unit 16b transports the paper from the paper feed unit 16a to the image forming unit 16d. The first paper transport unit 16b includes a first paper transport motor and multiple first paper transport roller pairs 16i. The first paper transport motor rotates the first paper transport roller pair 16i. The rotating first paper transport roller pair 16i feeds the paper to the image forming unit 16d.

[0026] The image forming section 16d forms an image (toner image) on the transported paper. The image forming section 16d includes image forming units 16Bk, 16Y, 16C, and 16M for four colors, an exposure device 16j, and an intermediate transfer unit. Each image forming unit 16 includes a photosensitive drum, a charging device, and a developing device. The image forming unit 16Bk forms a black image, the image forming unit 16Y forms a yellow image, the image forming unit 16C forms a cyan image, and the image forming unit 16M forms a magenta image.

[0027] The intermediate transfer unit includes an intermediate transfer belt 16k, a secondary transfer roller 16m, an intermediate drive roller 16n, intermediate driven rollers 16p, 16q, and four primary transfer rollers 16r. The intermediate transfer belt 16k is endless. The intermediate transfer belt 16k is wound around each roller. The intermediate transfer belt 16k receives the primary transfer of the toner image from the photosensitive drum. The toner images of each color are superimposed. The secondary transfer roller 16m performs the secondary transfer of the toner image onto the paper. The nip between the secondary transfer roller 16m and the intermediate transfer belt 16k is the position where the toner image is placed on the paper.

[0028] The paper that has passed through secondary transfer roller 16m enters fixing unit 16e. Fixing unit 16e includes a heater and a fixing roller. Print control unit 15 causes the fixing roller to heat and pressurize the paper onto which the toner image has been transferred. Second paper transport unit 16c transports the paper that has passed through fixing unit 16e toward the discharge tray. Second paper transport unit 16c includes a second paper transport motor and a second paper transport roller pair 16s. The second paper transport motor rotates the second paper transport roller pair 16s.

[0029] (Information processing device 2) Next, an example of the information processing device 2 according to the embodiment will be described with reference to Fig. 4. Fig. 4 is a diagram showing an example of the information processing device 2 according to the embodiment.

[0030] The information processing device 2 includes a processing unit 20, an information storage unit 21, a display 22, an input device 23, and an information communication circuit unit 24. The processing unit 20 is a board (control board) including a control circuit (CPU). The processing unit 20 performs calculations and processing. The processing unit 20 controls the operation of the information processing device 2. The information storage unit 21 includes a RAM 21a, a ROM 21b, and a storage 21c. For example, the storage is a hard disk drive (HDD). The information storage unit 21 can store data and software in a non-volatile manner. Details of the data and software stored in the information storage unit 21 will be described later.

[0031] For example, the display 22 includes a liquid crystal panel or an organic EL panel. The processing unit 20 displays a screen and information on the display 22. For example, the input device 23 is a keyboard and a mouse. The input device 23 accepts operations by the user. Based on the output of the input device 23, the processing unit 20 recognizes the operation content. The information communication circuit unit 24 communicates with the image forming apparatus 1 and the communication device 3 via a communication network. The processing unit 20 stores data received from the image forming apparatus 1 by the information communication circuit unit 24 in the information storage unit 21. The information storage unit 21 stores data for maintenance (adjustment) of the image forming apparatus 1. The processing unit 20 causes the information communication circuit unit 24 to transmit data to be transmitted to the image forming apparatus 1 to the image forming apparatus 1. The processing unit 20 also causes the information communication circuit unit 24 to transmit data to be transmitted to the communication device 3 to the communication device 3.

[0032] (Processing of image forming device 1) Next, an example of processing of the image forming apparatus 1 according to the embodiment will be described with reference to Figs. 5 to 7. Fig. 5 is a diagram showing an example of processing of the image forming apparatus 1 according to the embodiment. Fig. 6 is a diagram showing an example of a standard document 4 according to the embodiment. Fig. 7 is a diagram showing an example of a check area 5 according to the embodiment.

[0033] In the image forming apparatus 1, jobs can be executed. For example, copy jobs and scan / send jobs can be performed. In addition to these jobs, the image forming apparatus 1 can utilize an image quality status determination mode. The image quality status determination mode is a mode for diagnosing (determining, inspecting) the image quality status of the image forming apparatus 1. An example of processing in the image quality status determination mode of the image forming apparatus 1 will be described below with reference to Figs. 5 to 7.

[0034] First, when using the image quality status determination mode (when determining the status of the image forming apparatus 1), the user starts the status determination application 11a. The status determination application 11a is installed in the storage of the memory unit 11 of the image forming apparatus 1. The status determination application 11a is software including a program for executing each process in the image quality status determination mode. The status determination application 11a can be started by operating the operation panel 12. Based on the started status determination application 11a, the control unit 10 (control circuit 10a) executes each process.

[0035] The start of FIG. 5 is the time when the control unit 10 starts processing in response to the start of the state determination application 11a. First, the control unit 10 causes the printer unit 16 to print the standard document 4 (step #11). The control unit 10 stores the standard document printing image data 11b in a non-volatile manner (see FIG. 3). The control unit 10 causes the printer unit 16 to print the standard document 4 based on the standard document printing image data 11b. For example, the control unit 10 causes the standard document 4 to be printed out on A3 paper or A4 paper. Based on the standard document printing image data 11b, the control unit 10 causes the standard document 4 including a pattern image and a check area 5 to be printed. The pattern image is an image for determining the state of image quality in printing. The check area 5 is an area in which check items 6 are printed. The check items 6 are predetermined items for checking problematic symptoms in terms of image quality of printed matter.

[0036] Fig. 6 shows an example of a standard document 4 according to an embodiment. In Fig. 6, a rectangle including characters at the center position in the sub-scanning direction of the standard document 4 is a check area 5. Fig. 7 is an enlarged view of the check area 5. Fig. 7 shows an example in which eight check items 6 are arranged (described) in the check area 5: density abnormality, color reproduction abnormality, fog, color spots / black streaks, color streaks / white streaks, color misalignment, magnification abnormality, and offset. The number of check items 6 arranged may be more or less than the above eight.

[0037] The control unit 10 prints a combination of the check item 6 (item name) and the check box 61 within the check area 5. That is, the check item 6 and the check box 61 are printed inside the check area 5. The shape of the check box 61 is, for example, a square or rectangle. The shape of the check box 61 may be any other shape.

[0038] A plurality of types of pattern images are printed around the check area 5. For example, a first pattern image 71, a second pattern image 72, a third pattern image 73, a fourth pattern image 74, a fifth pattern image 75, a sixth pattern image 76, a seventh pattern image 77, an eighth pattern image 78, a ninth pattern image 79, a tenth pattern image 710, and an eleventh pattern image 711 are printed.

[0039] The first pattern image 71 is an image in which four band-shaped, rectangular patch images 71a extending in the sub-scanning direction are arranged in the main scanning direction. The first pattern image 71 is an image in which four rectangles (patch images 81) of black, magenta, cyan, and yellow are grouped together. The second pattern image 72 is an image in which four band-shaped, rectangular patch images 82 extending in the main scanning direction are arranged in the sub-scanning direction. The third pattern image 73 is also an image in which four band-shaped, rectangular patch images 83 extending in the main scanning direction are arranged in the sub-scanning direction. The second pattern image 72 and the third pattern image 73 are also images in which four rectangles of black, magenta, cyan, and yellow are grouped together.

[0040] The fourth pattern image 74 includes a plurality of squares (may be rectangles). For example, the control unit 10 prints different colors inside each square 84. The control unit 10 places color materials (toners) of two or more colors inside the squares 84. For convenience, only one of the plurality of squares 84 is labeled in FIG. 6.

[0041] The fifth pattern image 75, the sixth pattern image 76, and the seventh pattern image 77 each include a plurality of black lines extending in the main scanning direction. In the standard document printing image data 11b, the black lines are arranged in the sub-scanning direction at equal intervals. The fifth pattern image 75 includes a plurality of magenta color lines extending in the main scanning direction. The sixth pattern image 76 includes a plurality of cyan color lines extending in the main scanning direction. The seventh pattern image 77 includes a plurality of yellow color lines extending in the main scanning direction. Each color line is paired with one black line (details will be described later).

[0042] The eighth pattern image 78 is an image in which a plurality of black, magenta, cyan, and yellow rectangles (patch images 88) are arranged in the main scanning direction. The ninth pattern image 79 is also an image in which a plurality of black, magenta, cyan, and yellow rectangles (patch images 89) are arranged in the main scanning direction. The tenth pattern image 710 is also an image in which a plurality of black, magenta, cyan, and yellow rectangles (patch images 810) are arranged in the main scanning direction. The eleventh pattern image 711 is also an image in which a plurality of black, magenta, cyan, and yellow rectangles (patch images 811) are arranged in the main scanning direction.

[0043] Fig. 6 is an example of the standard document 4. The standard document 4 may include an image other than the pattern image exemplified in Fig. 6. In addition, Fig. 6 shows the standard document 4 for a color printer, but in a monochrome printer, a standard document 4 for a monochrome printer is used.

[0044] After printing the standard manuscript 4, the control unit 10 causes the display panel 12a to display a reading guide screen for the printed standard manuscript 4 (step #12). For example, the control unit 10 causes a message to be displayed within the reading guide screen. For example, the control unit 10 causes a message to be displayed notifying the user that the printed standard manuscript 4 should be set on the scanner unit 14 (document table 14d). In addition, the control unit 10 causes the display panel 12a to display a message notifying the user that a start button provided on the operation panel 12 should be operated after setting of the standard manuscript 4 is completed.

[0045] The user checks (puts a check mark) the check box 61 of the symptom of concern (the problem that the user feels is occurring) among the check items 6 in the check area 5. After entering the check, the user places the printed standard manuscript 4 on the manuscript table 14d.

[0046] When the start button (hard key 12c) is operated, the control unit 10 makes the scanner unit 14 read the printed standard document 4 (step #13). The data of the state determination application 11a includes setting value data. The setting value data is data that defines the setting values ​​for reading the standard document 4. For example, the setting value data includes settings for reading at the highest resolution, reading in color, and reading at 100% magnification. Based on the setting value of the setting value data, the control unit 10 makes the standard document 4 read. The user does not need to set the reading. Based on the analog image signal output by the scanner unit 14, the control unit 10 generates standard document data 40 (step #14). The standard document data 40 is image data of the standard document 4 (an image file obtained by reading the standard document 4).

[0047] Then, the control unit 10 transmits the status determination data to the information processing device 2 (step #15). The status determination data includes the generated standard manuscript data 40. The destination (address) of the information processing device 2 (destination) is registered in advance in the status determination application 11a. The control unit 10 may also include information related to the source device in the status determination data. For example, the control unit 10 may include information such as the address, manufacturing number, serial number, model name, user name registered in the image forming device 1, and the address of the maintenance company and person in charge (serviceman) registered in the image forming device 1 in the status determination data.

[0048] (Processing of information processing device 2) Next, an example of processing of the information processing device 2 according to the embodiment will be described with reference to Fig. 8. Fig. 8 is a diagram showing an example of processing of the information processing device 2 according to the embodiment.

[0049] The start of Fig. 8 is the point at which the information processing device 2 receives the status determination data. The information storage unit 21 (storage 21c) may store the received standard manuscript data 40 (status determination data) in a non-volatile manner (see Fig. 4). The processing unit 20 of the information processing device 2 recognizes the check item 6 selected in the check area 5 based on the standard manuscript data 40 included in the status determination data (step #21). The processing unit 20 recognizes the check item 6 with the check box 61 checked as the selected check item 6. The processing unit 20 also recognizes the check item 6 with the check box 61 not checked as the unselected check item 6.

[0050] The number of check boxes 61 arranged in the main scanning direction in the check area 5 is fixed. The arrangement order of the check items 6 in the main scanning direction is also predetermined. The position of the check area 5 is also predetermined. Therefore, the processing unit 20 may recognize a rectangle included in the arrangement position of the check area 5 in the standard manuscript data 40 as a check box 61. Then, the processing unit 20 recognizes the check items 6 corresponding to each rectangle (check box 61).

[0051] Then, the processing unit 20 recognizes the number of high-density pixels (pixels darker than a predetermined value) in the check box 61 (rectangle). The processing unit 20 recognizes the check box 61 in which the number of high-density pixels exceeds a predetermined check threshold as a checked check box 61. The processing unit 20 recognizes the check item 6 corresponding to the checked check box 61 as a selected check item 6. On the other hand, the processing unit 20 recognizes the check box 61 in which the number of high-density pixels is equal to or less than the check threshold as an unchecked check box 61. The processing unit 20 recognizes the check item 6 corresponding to the unchecked check box 61 as an unselected check item 6. Note that the processing unit 20 may determine whether or not the check box 61 is checked using another method.

[0052] Furthermore, the processing unit 20 judges the state of image quality of the image forming apparatus 1 based on the pattern image included in the received standard document data 40 (step #22). The processing unit 20 may judge the state of image quality for the following check item 6. Note that the processing unit 20 may also judge the presence or absence of symptoms (problems) other than the check item 6.

[0053] (1) Concentration abnormality The amount of toner applied (toner density per unit area) determines the darkness of the printed matter. In a dark portion, the toner density per unit area is high, and in a light portion, the toner density per unit area is low. Then, the difference between the density to be printed and the density of the actual print may become large. Then, the processing unit 20 may determine whether or not a problem (symptom) of density abnormality occurs. For example, based on the first pattern image 71, the second pattern image 72, and the third pattern image 73, the processing unit 20 determines whether or not a density abnormality occurs. For example, a density determination reference value is previously determined for each strip-shaped rectangle (patch image 81, 82, 83) included in the first pattern image 71, the second pattern image 72, and the third pattern image 73. Then, the processing unit 20 calculates the average value of pixel values ​​for each strip-shaped rectangle. The processing unit 20 determines a color having a density abnormality problem when the difference between the average value and the density determination reference value is outside a predetermined density tolerance range. The processor 20 determines that a color having a difference between the average value and the reference value for density determination that is within the density tolerance range is a color that has no density abnormality. Note that the processor 20 may determine whether or not the density is abnormal by other methods.

[0054] (2) Color Reproduction Abnormalities In printing, various colors are reproduced by overlapping toners of multiple colors. A problem may occur in which the difference between the color to be reproduced and the color actually printed becomes large. The processing unit 20 may determine whether or not a problem (symptom) of color reproduction abnormality occurs. For example, the processing unit 20 determines whether or not a color reproduction abnormality occurs based on the fourth pattern image 74. For example, a reference value for color reproduction judgment is predetermined for each square 84 of the fourth pattern image 74. Then, the processing unit 20 calculates an average value of pixel values ​​for each square 84. The processing unit 20 recognizes a square 84 in which the difference between the average value and the corresponding reference value for color reproduction judgment is outside the predetermined color reproduction tolerance range. The processing unit 20 determines that the color of the toner used to print the square 84 outside the color reproduction tolerance range is a color with a color reproduction abnormality problem. When the difference between the average value and the corresponding reference value for color reproduction judgment is within the color reproduction tolerance range for all squares, the processing unit 20 determines that there is no color reproduction abnormality problem. Note that the processing unit 20 may determine whether or not there is a color reproduction problem by other methods.

[0055] (3) Covering Fog is, for example, an abnormality in which excess toner is thinly deposited on a printed matter. The processing unit 20 may determine whether or not a fog problem (symptom) occurs. Based on the standard manuscript data 40, the processing unit 20 determines whether or not fog occurs. For example, the processing unit 20 focuses on a background (white) area outside the pattern image of the standard manuscript data 40. The processing unit 20 focuses on a part of the white area and obtains an average value of pixel values ​​included in the focused area. When the obtained average value is a pixel value darker than a predetermined reference value for fog determination, the processing unit 20 determines that there is a fog problem. When the obtained average value is a pixel value lighter than the reference value for fog determination, the processing unit 20 determines that there is no fog problem. Note that the processing unit 20 may determine whether or not there is a fog problem by other methods.

[0056] (4) Color and black spots The color point abnormality is an abnormality where a magenta, cyan, or yellow point larger than a certain size is unintentionally printed. The black point abnormality is an abnormality where a black point larger than a certain size is unintentionally printed. The processing unit 20 may determine whether or not a color point or black point abnormality has occurred. The processing unit 20 determines whether or not there is a color point or black point in the standard document data 40. The processing unit 20 recognizes a cluster of magenta, cyan, yellow, or black pixels larger than a certain size as a color point or black point. When there is a color point or black point, the processing unit 20 determines that there is a problem with the color point or black point. When there is no color point or black point, the processing unit 20 determines that there is no problem with the color point or black point. The processing unit 20 may determine whether or not there is a problem with the color point or black point by using another method.

[0057] (5) Colored streaks / white streaks The color streak is a black, magenta, cyan, or yellow line. The white streak is a white line. The white streak is caused by the color material (toner) not being applied to the part where it should be applied. Both the color streak and the white streak are symptoms in which a line (unnecessary line) not present in the standard document printing image data 11b appears. The processing unit 20 may then determine whether or not an abnormality in the color streak or white streak has occurred. The processing unit 20 determines whether or not the standard document data 40 includes a color streak or white streak not present in the standard document printing image data 11b. When it is determined that the standard document data 40 includes a color streak or white streak, the processing unit 20 determines that there is a problem with the color streak or white streak. When it is determined that the standard document data 40 does not include a color streak or white streak, the processing unit 20 determines that there is no problem with the color streak or white streak. The processing unit 20 may determine the presence or absence of an abnormality in the color streak or white streak by another method.

[0058] (6) Color shift Color misalignment is a problem where a color that is not in the image data (a misaligned color) is printed due to a misalignment in the overlapping positions of colors. For example, when overlapping four colors that extend in the main scanning direction and are one dot wide in the sub-scanning direction, if only magenta is misaligned by five dots in the sub-scanning direction, the magenta line will be drawn five dots away from the three color lines. This magenta line is a line that is not in the image data. Color misalignment can also be thought of as a misalignment in the drawing positions of each color (the positions where toner is placed).

[0059] Then, the processing unit 20 may determine whether or not there is a color misregistration problem. For example, based on the fifth pattern image 75, the sixth pattern image 76, and the seventh pattern image 77, the processing unit 20 determines the degree of misregistration of each color relative to black. In the standard document printing image data 11b, in the fifth pattern image 75, the sixth pattern image 76, and the seventh pattern image 77, only one set of black lines and color lines that serves as a reference is a straight line. In the other combinations, the positions of the color lines in the sub-scanning direction relative to the black lines are different. Then, the processing unit 20 recognizes combinations in which the black lines and color lines are in a straight line in the standard document data 40. Based on the recognized combinations of straight lines, the processing unit 20 recognizes whether or not there is a misregistration in the position of each of magenta, cyan, and yellow relative to black in the sub-scanning direction, and the amount and direction of misregistration if there is a misregistration. On the other hand, the processing unit 20 determines that there is no color misregistration problem when the combination in which the black lines and color lines are in a straight line is the reference combination for any of the colors magenta, cyan, and yellow. The processing unit 20 may determine the presence or absence of color shift, the amount of color shift, and the direction of shift by using other methods.

[0060] (7) Abnormal magnification The magnification abnormality is an abnormality in which the pitch of one dot or multiple dots in the paper is not uniform, resulting in a variation that exceeds the allowable range. The processing unit 20 may then determine whether or not there is a magnification abnormality. For example, the processing unit 20 determines whether or not there is a problem with magnification abnormality based on the eighth pattern image 78, the ninth pattern image 79, the tenth pattern image 710, and the eleventh pattern image 711. In the standard document printing image data 11b, the size of the rectangles (patch images 88, 89, 810, 811) of each color in the eighth pattern image 78, the ninth pattern image 79, the tenth pattern image 710, and the eleventh pattern image 711 is fixed (reference size). The processing unit 20 checks the size of the rectangles of each color. For example, it recognizes the size of the rectangles of each color in the main scanning direction. The processing unit 20 determines that a color in which the difference between the predetermined reference size and the recognized size is outside a predetermined magnification allowable range is a color that has a problem with magnification abnormality. When the difference between the recognized size and the reference size is within the magnification tolerance for all rectangle sizes, the processing unit 20 determines that there is no problem with magnification anomaly. The processing unit 20 may determine the presence or absence of a problem with magnification anomaly by using another method.

[0061] (8) Offset Offset refers to a situation where part of the previous print content is printed on a subsequent sheet of paper. Part of the previous print content appears on the print like an afterimage. The more severe the symptom, the lower the image quality of the print. Here, since there is no image data of the print before the printing of the standard manuscript 4, it may be difficult for the information processing device 2 (processing unit 20) to determine whether or not an offset abnormality has occurred. Therefore, the processing unit 20 may not determine whether or not an offset abnormality problem has occurred. In this way, for some check items 6, the processing unit 20 may not make a determination based on the standard manuscript data 40.

[0062] Next, the processing unit 20 recognizes the different items among the check items (step #23). The different items are check items 6 that are recognized as selected in the check area 5, but are judged to be no problem based on the judgment based on the pattern image. These are check items 6 where there is a discrepancy between the user's opinion and the judgment result of the pattern image of the standard manuscript data 40. It is necessary to check the occurrence frequency of the selected check items 6 on the actual machine. Note that when there are no check items 6 that correspond to the different items, the processing unit 20 judges that there are no different items.

[0063] Furthermore, the processing unit 20 recognizes matching items among the check items (step #24). A matching item is a check item 6 that is recognized as being selected in the check area 5 and is determined to be problematic based on the pattern image. It is possible to extract check items 6 that are highly in need of repair. Note that when there is no check item 6 that corresponds to the matching item, the processing unit 20 determines that there is no matching item.

[0064] The processing unit 20 also recognizes undetermined items (step #25). An undetermined item is a check item 6 that has been recognized as selected in the check area 5 but has not been determined based on the pattern image. For example, if the offset check item 6 is checked, the processing unit 20 recognizes the offset check item 6 as an undetermined item. Symptoms that the user is concerned about can be recognized. When there is no check item 6 that corresponds to an undetermined item, the processing unit 20 determines that there are no undetermined items.

[0065] The processing unit 20 causes the information communication circuit unit 24 to transmit the judgment result of the image quality state of the image forming device 1 based on the pattern image, the different items, the matching items, and the unjudged items to the communication device 3 corresponding to the image forming device 1 (step #26). For example, the processing unit 20 transmits information on the check items 6 judged to have a problem and the colors judged to have a problem in the check items 6 judged to have a problem as the judgment results.

[0066] When it is determined that there are no different items, the processing unit 20 notifies the communication device 3 corresponding to the image forming device 1 that there are no different items. When it is determined that there are no matching items, the processing unit 20 notifies the communication device 3 corresponding to the image forming device 1 that there are no matching items. When it is determined that there are no undetermined items, the processing unit 20 notifies the communication device 3 corresponding to the image forming device 1 that there are no undetermined items.

[0067] The communication device 3 corresponding to the image forming device 1 is, for example, a PC of a company in charge of maintenance of the image forming device 1. The communication device 3 corresponding to the image forming device 1 may also be a communication device 3 (for example, a smartphone) carried by a maintenance staff member of the image forming device 1. The processing unit 20 may transmit the state determination data to the address of the maintenance staff member of the image forming device 1 that was attached to the state determination data.

[0068] Furthermore, the processing unit 20 may attach information for identifying the image forming device 1 to the information on the determination result, the different items, the matching items, and the undetermined items. For example, the processing unit 20 may attach information such as the manufacturing number, serial number, model name, and user name of the image forming device 1.

[0069] The processing unit 20 also causes the information communication circuit unit 24 to transmit the different items, matching items, and undetermined items together with the determination result of the image quality state of the image forming device 1 based on the pattern image to the image forming device 1 that transmitted the standard document data 40 (step #27). The information transmitted to the image forming device 1 may be the same as that transmitted to the communication device 3. The determination result can also be notified to the user.

[0070] Furthermore, the processing unit 20 updates the statistical data 25 (step #28). The information storage unit 21 stores the statistical data 25 in a non-volatile manner. The information processing device 2 receives standard manuscript data 40 from a plurality of image forming devices 1. The statistical data 25 is data summarizing the number of times each check item 6 was selected in the check area 5 for each model. If there is a selected check item 6 in the check area 5 of the standard manuscript data 40, the processing unit 20 updates the statistical data 25. Specifically, the processing unit 20 adds 1 to the number (value) of the selected check item 6 in the statistical data 25 for the model of the image forming device 1 that received the standard manuscript data 40.

[0071] The statistical data 25 may include the number of times a symptom determined to be problematic based on the pattern image for each model. If there is a symptom determined to be problematic based on the pattern image of the standard manuscript data 40, the processing unit 20 may update the statistical data 25. Specifically, the processing unit 20 adds 1 to the value of the number of times a symptom determined to be problematic for the model of the image forming device 1 that received the standard manuscript data 40 in the statistical data 25. This makes it possible to obtain data that is useful for understanding symptoms that are likely to occur for each model.

[0072] In this manner, the image judgment system 100 according to the embodiment includes an image forming apparatus 1 and an information processing apparatus 2. The image forming apparatus 1 prints a standard manuscript 4 including a pattern image for judging the state of image quality in printing. The image forming apparatus 1 prints a check area 5 including check items 6 for the image quality of the printed matter within the standard manuscript 4. The image forming apparatus 1 reads the printed standard manuscript 4 and generates standard manuscript data 40 which is image data of the standard manuscript 4. The image forming apparatus 1 transmits the generated standard manuscript data 40 to the information processing apparatus 2. The information processing apparatus 2 receives the standard manuscript data 40. The information processing apparatus 2 recognizes the check items 6 selected in the check area 5 based on the received standard manuscript data 40.

[0073] This allows the check items 6 (check areas 5) to be printed on the standard manuscript 4. The user simply writes on the standard manuscript 4 so that the selected check items 6 are clear. Information indicating the symptoms that the user finds problematic (symptoms of concern) is transmitted to the information processing device 2. The information processing device 2 can simultaneously obtain image data (pattern image) for determining the image quality state and data indicating the symptoms of concern (check items 6). In other words, the information processing device 2 can determine and diagnose the state of the image forming device 1 based on the pattern image. Moreover, by recognizing the selected check items 6, the symptoms that the user is concerned about can also be grasped at the same time.

[0074] It is possible to grasp the symptoms that the user is concerned about without directly speaking with the user. It is possible to accurately grasp the symptoms that the user is concerned about before visiting the user. It may be possible to grasp problems that are not shown in the standard manuscript data 40. Therefore, it is possible to fully grasp the state of the image forming apparatus 1 and the user's concerns before the visit. As a result, it is possible to grasp all replacement parts required for maintenance before the visit. The service person will not have to return to the company to get replacement parts. The time required for maintenance is shortened. Therefore, the time during which there are problems with image quality can be shortened.

[0075] The image forming apparatus 1 prints a combination of a check item 6 and a check box 61 in the check area 5. The information processing apparatus 2 recognizes a check item 6 with a checked check box 61 as a selected check item 6. The information processing apparatus 2 recognizes a check item 6 with an unchecked check box 61 as an unselected check item 6. This allows the user to select the check item 6 simply by checking the check box 61. In other words, the check item 6 can be easily selected. Furthermore, the information processing apparatus 2 can accurately recognize whether the check item 6 is selected or not, simply by checking whether it is checked or not.

[0076] The information processing device 2 judges the state of image quality in printing by the image forming device 1 based on the pattern image included in the received standard document data 40. This makes it possible to judge (diagnose) the state of the image forming device 1, the presence or absence of problematic symptoms in terms of image quality, and the currently occurring symptoms based on the image data of the printout of the standard document 4. The state of the image forming device 1 can be grasped.

[0077] The information processing device 2 judges whether or not there is a problem with the check item 6 based on the pattern image. The information processing device 2 recognizes a difference item, which is a check item 6 that was recognized as selected but was determined to be no problem based on the pattern image. This makes it possible to clarify the check item 6 (symptom of concern) selected by the user, which could not be recognized in the pattern image. It is understood that the symptom of concern does not necessarily occur. It is possible to grasp problems with image quality that are thought not to occur all the time.

[0078] The information processing device 2 transmits the difference items to the communication device 3 corresponding to the image forming device 1. This makes it possible to notify the company or serviceman in charge of maintaining the image forming device 1 of the difference items. Information useful for inspection and repair can be delivered to the serviceman. Here, the communication device 3 corresponding to the image forming device 1 may be a PC of the maintenance company of the image forming device 1, or may be a portable communication device 3 (mobile phone, smartphone) carried by the serviceman.

[0079] The information processing device 2 judges whether or not there is a problem with the check item 6 based on the pattern image. The information processing device 2 recognizes matching items, which are check items 6 that have been recognized as selected and have been judged to have a problem in the judgment based on the pattern image. This makes it possible to grasp symptoms (problems) that the user is concerned about and that are also prominently shown in the standard manuscript data 40. It is possible to reliably grasp problems with image quality that need to be repaired.

[0080] The information processing device 2 transmits the matching items to the communication device 3 corresponding to the image forming device 1. This makes it possible to notify the matching items to a company or serviceman in charge of maintenance of the image forming device 1. Information useful for inspection and repair can be delivered to the serviceman.

[0081] The information processing device 2 receives standard document data 40 from multiple image forming devices 1. The information processing device 2 counts the number of times each check item 6 is selected in the check area 5 for each model. This makes it possible to obtain statistical data for the selected check items 6. It is possible to grasp the frequency of selection for each model and each check item 6. It is possible to obtain statistical data that is useful for adjusting the timing of maintenance, such as early replacement of parts related to check items 6 that are likely to be selected. It also becomes easier to grasp problems (symptoms) that should be addressed as a priority. It is possible to obtain statistical data that is useful for the development of the image forming device 1.

[0082] The image forming apparatus 1 according to the present invention includes a printer unit 16, a scanner unit 14, a communication circuit unit 10d, and a control unit 10. The printer unit 16 prints a standard document 4 including a pattern image for judging the state of image quality of a printed matter. The scanner unit 14 reads the printed standard document 4. The communication circuit unit 10d transmits standard document data 40, which is image data generated by reading the standard document 4, to the information processing device 2. The control unit 10 causes the printer unit 16 to print a check area 5 in the standard document 4, in which a check item 6 for the image quality of a predetermined printed matter is arranged. This makes it possible to print the check item 6 (check area 5) on the standard document 4. The user only needs to add writing to the standard document 4 so that the selected check item 6 can be identified. Then, the image forming apparatus 1 transmits the judgment image (pattern image) and information indicating the symptom of concern to the information processing device 2. The information processing device 2 can simultaneously acquire the pattern image and information indicating the symptom of concern.

[0083] Although an embodiment of the present invention has been described above, the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. [Industrial Applicability]

[0084] The present invention can be used in a system including an image forming apparatus and an information processing apparatus. [Explanation of symbols]

[0085] 100 Image judgment system 1 Image forming device 10 Control section 10d Communication circuit section 14 Scanner section 16 Printer section 2 Information processing device 3 Communication device 4 Standard manuscript 5 Check area 6 Check items 61 Check boxes 71 First pattern image (pattern image) 72 Second pattern image (pattern image) 73 Third pattern image (pattern image) 74 4th pattern image (pattern image) 75 5th pattern image (pattern image) 76 6th pattern image (pattern image) 77 7th pattern image (pattern image) 78 8th pattern image (pattern image) 79 9th pattern image (pattern image) 710 10th pattern image (pattern image) 711 11th pattern image (pattern image)

Claims

1. An image forming apparatus and an information processing apparatus are provided, The image forming apparatus includes: Printing a standard document including a pattern image for judging the state of image quality in printing; A check area including check items for the image quality of the print is printed in the standard document; The printed standard document is read, and standard document data, which is image data of the standard document, is generated. Generate the data, Transmitting the generated standard document data to the information processing device; The information processing device includes: receiving the standard manuscript data; Recognizing the check item selected in the check area based on the received standard manuscript data; determining a state of image quality in printing by the image forming apparatus based on the pattern image included in the received standard document data; determining whether or not there is a problem with the check item based on the pattern image; The image judgment system recognizes a difference item, which is a check item that is recognized as having been selected but is judged to be no problem based on the pattern image.

2. The image judgment system according to claim 1 , wherein the information processing device transmits the difference items to a communication device.

3. An image forming apparatus and an information processing apparatus are provided, The image forming apparatus includes: Printing a standard document including a pattern image for judging the state of image quality in printing; A check area including check items for the image quality of the print is printed in the standard document; The printed standard document is read, and standard document data, which is image data of the standard document, is generated. Generate the data, Transmitting the generated standard document data to the information processing device; The information processing device includes: receiving the standard manuscript data; Recognizing the check item selected in the check area based on the received standard manuscript data; determining a state of image quality in printing by the image forming apparatus based on the pattern image included in the received standard document data; determining whether or not there is a problem with the check item based on the pattern image; An image judgment system that recognizes a matching item, which is a check item that has been recognized as selected and has been judged to be problematic based on the pattern image.

4. The image judgment system according to claim 3 , wherein the information processing device transmits the matching items to a communication device.

5. An image forming apparatus and an information processing apparatus are provided, The image forming apparatus includes: Printing a standard document including a pattern image for judging the state of image quality in printing; A check area including check items for the image quality of the print is printed in the standard document; The printed standard document is read, and standard document data, which is image data of the standard document, is generated. Generate the data, Transmitting the generated standard document data to the information processing device; The information processing device includes: receiving the standard manuscript data; Recognizing the check item selected in the check area based on the received standard manuscript data; receiving the standard document data from a plurality of the image forming apparatuses; An image judgment system that counts the number of times each check item is selected in the check area for each model.

6. The image forming apparatus includes: Printing a combination of the check items and check boxes in the check area; The information processing device includes: Recognizing the check item whose check box is checked as the selected check item; The image assessment system according to any one of claims 1 to 5, wherein the check items whose check boxes are not checked are recognized as the check items that are not selected.

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