JP2013251611A - Image processing apparatus, control method of the same, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing apparatus, a control method of the same, and a program which suppress the retention of a printed matter waiting an inspection.SOLUTION: An image processing apparatus 101 discriminates by printing processing whether an image to be printed on a recording medium is a color image. If discriminating the image in the affirmative, the apparatus 101 adjusts the timing of performing printing image data generation processing, reference image processing, printing processing, scan image acquisition processing, and quality determination processing so as to perform the printing processing, scan image acquisition processing, and quality determination processing after performing the printing image data generation processing and reference image processing.

Description

  The present invention relates to an image processing apparatus, a control method therefor, and a program.

  Conventionally, digital printing technology based on electrophotographic technology called print-on-demand has become common, mainly in the printing industry, and it is required to maintain the print quality and efficiently produce the required amount of printed matter. Yes.

  In recent years, there has been a demand for efficiently creating printed matter that maintains print quality even in a normal office.

  With regard to this print quality, conventionally, in the inspection of the image quality of a printed output, it has been common for an operator to visually confirm the printed output. For this reason, it depends on the sensory evaluation by the operator, and there is a possibility that the inspection level may vary. In addition, the inspection time depends on the skill level of the operator, and there is a limit to shortening the inspection time because it depends on the hand.

  In recent years, therefore, an apparatus for inspecting the image quality of printed output has been devised. As such a device, a device that detects a printing error, ink spillage, or dirt by reading a printed output product that has been printed with a scanner or camera and comparing the image data of the printed image with the scanned scan data has been proposed. (For example, refer to Patent Document 1).

  In this patent document, a printed output that has been printed is read with a scanner or camera, scanned using the image data of the printed image as a reference, and compared with the scanned data of the printed output, and printed when a printing error is detected. It is stated to stop.

JP 2003-94627 A

  However, in the above-mentioned patent document, the image data of the print image is compared with the data stored as a reference, and the image data generation of the print image, the printing operation, the scan operation of the printed output, and the processing of the comparison operation are performed. No mention of timing.

  As described above, when inspecting the quality of a printing unit on which an image is printed, depending on the timing of processing, a deviation occurs between the timing of printing and the timing of inspection, and as a result, the printed matter waiting for inspection stays. There was a problem.

  An object of the present invention is to provide an image processing apparatus, a control method therefor, and a program that suppress the retention of printed matter waiting for inspection.

  In order to achieve the above object, an image processing apparatus according to claim 1 is generated by a generation unit that performs print image data generation processing for generating print image data for printing an image on a recording medium, and generated by the generation unit. Printing means for performing printing processing for printing an image indicated by print image data on the recording medium; and reading the image from the recording medium on which the image has been printed by the printing means, whereby the image printed on the recording medium is A scan image acquisition unit for performing a scan image acquisition process for acquiring a scan image to be displayed, and a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit Reference image generation means for performing reference image processing to be generated and acquired by the scanned image acquisition means. Comparing the scanned image and the reference image generated by the reference image generating unit, thereby performing a quality determining process for determining the quality of the image printed on the recording medium by the printing unit; A determination unit that determines whether an image printed on the recording medium is a color image by the printing process, and when the determination unit determines affirmatively, the print image data generation process and the reference image process are performed. After that, the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process are performed so as to perform the print process, the scan image acquisition process, and the quality determination process. And arbitration means for arbitrating the timing of performing the above.

  ADVANTAGE OF THE INVENTION According to this invention, the image processing apparatus which suppresses that the printed matter waiting for a test | inspection stays, its control method, and a program can be provided.

1 is a diagram showing a schematic configuration of an image processing system including an image processing apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a schematic configuration of an image forming controller and an image inspection controller that control the image processing apparatus in FIG. 1. It is a figure which shows the mechanical structure of the image printing unit in FIG. 1, an image inspection unit, and a finishing unit. It is a figure for demonstrating the scanning method of the test | inspection scanner in FIG. It is a figure for demonstrating the determination method of the image comparison determination part in FIG. It is a flowchart which shows the procedure of the arbitration process performed by the image test | inspection controller in FIG. 3 is a flowchart showing a procedure of print image data generation processing executed by the image forming controller in FIG. 2. It is a flowchart which shows the procedure of the image test | inspection process performed by the image test | inspection controller in FIG. It is a figure which shows the example of a screen which displayed that the image test result was OK on the test | inspection display part of FIG. It is a figure which shows the example of a screen which displayed that the image test result was NG on the test | inspection display part of FIG. It is a figure which shows the timing chart at the time of performing the image inspection process by parallel processing of five monochrome images. It is a figure which shows the timing chart at the time of performing an image test | inspection process by a sequential process of five color images. It is a figure which shows the timing chart at the time of performing an image inspection process by a parallel process when the total time of a reference image process and an image comparison determination process becomes more than printing time. It is a flowchart which shows the procedure of the arbitration process in 2nd Embodiment performed by the image test | inspection controller in FIG. It is a flowchart which shows the procedure of the arbitration process in 3rd Embodiment performed by the image test | inspection controller in FIG. It is a flowchart which shows the procedure of the arbitration process in 4th Embodiment performed by the image test | inspection controller in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram showing a schematic configuration of an image processing system 100 including an image processing apparatus 101 according to an embodiment of the present invention.

  In FIG. 1, the image processing system 100 includes an image processing apparatus 101, a print server 106, and PCs 107 and 108, which are connected via a LAN 105.

  The image processing apparatus 101 includes an image printing unit 102, an image inspection unit 103, and a finishing unit 104.

  The image printing unit 102 processes an image and prints it on a recording medium. In the following description, the recording medium is assumed to be paper. The image inspection unit 103 performs image inspection processing on the paper on which the image is printed. Then, the finishing unit 104 discharges the paper on which the image inspection process has been performed by the image inspection unit 103.

  Accordingly, when printing is executed by the image processing apparatus 101, an inspection of an image printed on paper is performed inline, and the printed matter is discharged.

  Therefore, the image processing apparatus 101 is an image processing apparatus that realizes so-called in-line image inspection that consistently performs printing, image inspection, and finishing.

  In the image processing system 100, the user can request printing from the PC 107 or PC 108 to the image processing apparatus 101 via the print server 106.

  FIG. 2 is a diagram showing a schematic configuration of the image forming controller 201 and the image inspection controller 210 that control the image processing apparatus 101 in FIG.

  In FIG. 2, the image forming controller 201 includes a LAN control unit 203, a RIP processing unit 204, an operation unit 205, an image formation control unit 206, a memory unit 207, a print image processing unit 208, a mechanism process control unit 209, and an inspection scanner 217. Consists of.

  The LAN control unit 203 controls LAN communication. Specifically, image data (for example, PDL data) is received from the LAN 105, and various image data of the image processing apparatus 101 and information on the image processing apparatus are transmitted to the LAN 105.

  The RIP processing unit 204 decodes the input PDL data and develops it into RIP data used for printing. The operation unit 205 includes an operation panel for a user to perform various operations and a display unit for displaying operation information.

  An image formation control unit 206 controls each unit of the image formation controller 201. The memory unit 207 also has a data memory that stores PDL data, print image data, and the like, and a program memory that stores a control program. The print image data is image data for printing an image on paper.

  The print image processing unit 208 corresponds to a generation unit that performs print image data generation processing for generating print image data for printing an image on paper.

  The mechanism process control unit 209 corresponds to a printing unit for printing an image, and performs print processing for printing an image indicated by the print image data generated by the print image processing unit 208 on paper. Further, the mechanism process control unit 209 performs printing and recording paper control in the image printing unit 102, the image inspection unit 103, and the finishing unit 104 constituting the image processing apparatus 101 when printing an image on paper.

  In other words, the mechanism process control unit 209 performs print control on paper and paper transport mechanism control in print processing in the image printing unit 102, image inspection processing in the image inspection unit 103, and paper discharge processing in the finishing unit 104. Do.

  The inspection scanner 217 reads image printed on the paper in the image inspection unit 103 to obtain image data indicating the image printed on the paper. The inspection scanner 217 according to the present embodiment is an image scanner including a light source for reading and a line sensor, and scans paper to read an image. Further, it is assumed that the reading resolution of the line sensor is 600 dpi.

  The image inspection controller 210 includes an inspection operation unit 211, a memory unit 212, a reference image processing unit 213, an inspection display unit 214, a print inspection processing timing adjustment unit 215, and an inspection control unit 216.

  Further, the image inspection controller 210 includes a scan image processing unit 218, an image comparison / determination unit 220, a scan image storage unit 221, and a reference image storage unit 222.

  The scan image processing unit 218 performs image processing for inspecting the image data obtained by the inspection scanner 217 by the image comparison determination unit 220. Specifically, the image processing here is resolution conversion processing, scanner characteristic correction processing, or the like. The image data processed by the scan image processing unit 218 is expressed as a scan image. The scan image processing unit 218 and the inspection scanner 217 serve as a scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating an image printed on paper by reading the image from the paper on which the image is printed. Correspond.

  The inspection operation unit 211 includes an operation panel on which a user performs various operations related to image inspection. The memory unit 212 stores various processing programs performed by the image inspection controller 210.

  The reference image processing unit 213 performs image processing for using the print image data as comparison data for comparison with the scanned image. Specifically, the image processing here includes descreen processing for converting print image data from a binary image to a multi-value image, gradation correction, resolution conversion processing, and the like. The verification data is simply expressed as a reference image in the following description. Also, the paper on which the image is printed is expressed as a printed matter. The reference image processing unit 213 corresponds to a reference image generation unit that performs reference image processing for generating a reference image for comparison with a scanned image acquired from the generated print image data.

  The inspection display unit 214 displays the image inspection result for the user. When performing image inspection, the print inspection processing timing arbitration unit 215 performs inspection control processing for controlling the timing of executing print image data generation processing and image inspection processing, either “parallel processing” or “sequential processing”. Decide on either side.

  The inspection control unit 216 controls each unit of the image inspection controller 210. The image comparison determination unit 220 corresponds to the quality determination unit, and performs a quality determination process for determining the quality of the printed image by comparing the scanned image and the reference image.

  The scan image storage unit 221 stores a scan image when the image comparison determination unit 220 makes a determination. The reference image storage unit 222 stores a reference image.

  A communication line 223 is a communication line for the image formation control unit 206 and the inspection control unit 216 to exchange information. The information communicated here includes print setting information set by the image formation control unit 206, inspection setting information set by the inspection control unit 216, and the like. The communication line 223 may be a LAN cable or the like, and is determined as appropriate in accordance with a communication protocol that the image formation control unit 206 and the inspection control unit 216 can handle.

  In this embodiment, the image formation control unit 206 and the inspection control unit 216 are connected one-to-one. However, one or more image inspections are performed for each of one or more image formation controllers. A controller may be connected.

  FIG. 3 is a diagram showing a mechanical configuration of the image printing unit 102, the image inspection unit 103, and the finishing unit 104 in FIG.

  In FIG. 3, a laser exposure unit 302 causes a light beam such as a laser beam modulated according to print image data to enter a rotating polygon mirror (polygon mirror) 303 that rotates at a constant angular velocity, and is reflected on the photosensitive drum 305 as reflected scanning light. Irradiate. The image processing apparatus 101 is provided with four development units for printing in cyan (C), magenta (M), yellow (Y), and black (K), and there are four photosensitive drums. Here, the description is made using the photosensitive drum 305.

  In the image forming unit 304, the photosensitive drum 305 is driven to rotate, the photosensitive drum 305 is charged by the charger of the image forming unit 304, and the latent image formed on the photosensitive drum 305 is developed with toner.

  Then, the toner image is transferred to the paper transported by the transport belt 306, and the minute toner remaining on the photosensitive drum 305 without being transferred is collected.

  As described above, the four development units arranged in the order of CMYK sequentially perform magenta, yellow, and black image forming operations after a predetermined time has elapsed from the start of image formation in the cyan station. With this timing control, a full-color toner image without color misregistration is recorded during recording.

  Note that the image processing apparatus 101 assumes color image printing, but is not limited to this, and may be an image forming apparatus equipped with only a black developing unit.

  The fixing unit 308 includes a combination of a roller and a belt, and includes a heat source such as a halogen heater. The toner transferred onto the paper by the image forming unit 304 is melted and fixed by heat and pressure. A conveyance belt 307 conveys paper from the image forming unit 304 to the fixing unit 308.

  The paper feed unit 309 is provided with a recording paper storage unit 310 therein. A typical example of the recording paper storage unit 310 is a so-called recording paper cassette or paper deck.

  There may be one recording paper storage unit 310 or a plurality of recording paper storage units 310 so that various types of recording media can be stored in order to use a plurality of types of recording media. When printing is performed, one sheet is separated from the recording medium stored in the recording paper storage unit 310 and is transported to the image forming unit 304 by the transport roller 311.

  A paper discharge roller 312 discharges paper from the image printing unit 102. Accordingly, the paper that is pulled out from the recording paper storage unit 310, transferred with toner, and fixed by the fixing unit 308 is discharged by the paper discharge roller 312.

  A paper feed roller 314 receives the paper discharged from the image printing unit 102 and feeds it to the image inspection unit 103. The conveyance belt 315 conveys the paper fed by the paper feed roller 314.

  The inspection scanner 217 scans the paper transported by the transport belt 315 and reads an image printed on the paper. A conveyance belt 317 conveys paper. A paper discharge roller 318 discharges paper from the image inspection unit 103.

  The paper feed roller 320 receives the paper discharged from the image inspection unit 103 and feeds it to the finishing unit 104.

  The paper discharge separator 321 sorts the paper discharge destination. The paper discharge roller 322 discharges paper to the paper discharge tray 323. On the other hand, the paper discharge roller 324 discharges paper to the paper discharge tray 325.

  Note that the print control and recording sheet control in the image printing unit 102, the image inspection unit 103, and the finishing unit 104 are all performed by the mechanism process control unit 209 in FIG.

  In addition, as shown in FIG. 3, the image processing apparatus 101 performs in-line that performs printing, inspection, and discharge control based on the inspection result on a sheet of paper in real time in the process of discharging the printed matter. It is an image inspection device.

  FIG. 4 is a diagram for explaining a scanning method of the inspection scanner 217 in FIG.

  In FIG. 4, the inspection scanner 217 includes a light source 603 and a scan sensor 605.

  When the printed material 601 is conveyed by the conveying belt 315, the printed material 601 reaches the inspection scanner 217, and the printed material 601 moves and the image on the paper surface is scanned by the inspection scanner 217.

  At this time, the inspection control unit 216 controls the inspection scanner 217 via the scan image processing unit 218 to cause the light source 603 to emit light, and the scan sensor 605 acquires image data.

  In the present embodiment, the reading resolution of the scan sensor 605 of the inspection scanner 217 is 600 dpi. Accordingly, the resolution in the main scanning direction during scanning is 600 dpi.

  Further, the scan image processing unit 218 performs image processing so that the resolution in the conveyance direction of the printed material 601, that is, the resolution in the sub-scanning direction is also 600 dpi.

  In addition, the scan image processing unit 218 can correct even when a mechanical shift or distortion occurs due to the skew or misalignment of the printed material 601.

  FIG. 5 is a diagram for explaining a determination method of the image comparison determination unit 220 in FIG.

  In FIG. 5, a reference image and a scanned image are shown.

  The image comparison / determination unit 220 performs resolution conversion in the reference image processing unit 213 and the scan image processing unit 218, respectively, and performs matching between the reference image and the scan image matched with the inspection resolution using a bitmap.

  That is, the image comparison / determination unit 220 divides the reference image and the scan image into a plurality of 5 × 5 pixel blocks as shown in the figure, and the density in RGB or CMYK for each pixel in each pixel block. Make a comparison.

  Whether to perform comparison with RGB or CMYK can be changed according to the image. For example, in the case of a color image, the comparison is performed in RGB, and in the case of a monochrome image, CMYK (K only). Compare with.

  The reference image and the scan image shown in the figure represent a part of the monochrome image. Further, the density data in the pixel is multi-value data from 0 to 255. Therefore, the comparison value is obtained by the following formula.

Comparison value = [Scanned image density data value] − [Reference image density data value]
Then, the absolute value of the comparison value is compared with a predetermined allowable density difference. As a result, if the absolute value of the comparison value <allowable density difference, the pixel is determined to be OK, and otherwise it is determined to be NG.

  For example, if the allowable density difference is set to 40, the image density data value of the pixel 703 is 255, and the image density data value of the pixel 704 is 0, the absolute value of the comparison value is | 0-255 | Since it is larger than the allowable density difference of 40, the corresponding pixel is determined to be NG.

  In this way, the same quality determination process is repeated for each pixel in the pixel block of 5 × 5 pixels, and an OK determination rate for each pixel block is obtained. The OK determination rate for each pixel block is compared with a preset OK determination threshold.

  For example, when the OK determination threshold value is specified at 80% and the number of NG pixels in the block is one pixel, the determination rate (96%)> OK determination threshold value (80%). Is determined OK.

  This determination is performed on the entire surface of the printed matter, and if all blocks are determined OK, it is determined to be OK, and if even one block has NG, it is determined to be NG.

  Since the comparison of image data is performed for each pixel in a 5 × 5 image block, the number of pixels to be compared increases as the resolution of the image at the time of comparison increases. Therefore, the number of comparison repetitions increases. That is, the higher the image resolution at the time of image comparison, the longer the time required for determination.

  As described above, the image comparison / determination unit 220 divides each of the scan image and the reference image into a plurality of regions, and compares the density of the pixels included in the divided regions to thereby compare the quality of the image printed on the paper. Quality determination processing is performed to determine In the present embodiment, there is an accuracy level indicating the accuracy in the inspection. The accuracy level includes “standard” for performing a normal level inspection and “high resolution” for performing a more accurate inspection.

  The accuracy level indicates how fine an image defect is detected when the image is inspected.

  For example, if a typographical error or omission of characters at the time of printing, omission of a relatively large area of a graphic or ruled line, or contamination of a large printed area is detected, a highly accurate inspection is not necessary.

  On the other hand, when detecting small spots, blurring of a character, figure, or small area of a ruled line, a more accurate inspection is required.

  The accuracy level depends on the inspection resolution of the reference image and the scanned image in the image inspection controller 210.

  The number of pixels included in the area is higher in “high resolution” than in “standard”. In the case of “Standard”, the printed matter waiting for inspection does not stay even in parallel processing, but in the case of “High resolution”, the printed matter waiting for inspection stays in parallel processing. ing.

  As described above, the accuracy level in the present embodiment is set to either “standard” for performing a normal level inspection or “high resolution” for performing a higher accuracy inspection.

  FIG. 6 is a flowchart showing the procedure of the arbitration process executed by the image inspection controller 210 in FIG.

  In FIG. 6, when inspection settings are input (step S401), it is determined whether or not to perform image inspection (step S402). The inspection setting includes a setting for not performing an image inspection and a setting for performing an image inspection. In the inspection setting, the above-described accuracy level is also set.

  If the image inspection is not performed as a result of the determination in step S402 (NO in step S402), the image forming control unit 206 is notified that the image inspection is not performed (step S403), and the process is terminated.

  On the other hand, when the image inspection is performed as a result of the determination in step S402 (YES in step S402), the image forming control unit 206 is notified that the image inspection is performed (step S404).

  Next, a print setting notification for processing by the print image processing unit 208 is received from the image formation control unit 206 (step S405). Here, the print setting when processed by the print image processing unit 208 is information indicating whether the print image data is a color image or a monochrome image. This information is also information indicating whether the reference image is a color image or a monochrome image.

  Next, it is determined whether the print image data is a color image (step S406). This step S406 corresponds to a determination means for determining whether or not the image printed on the paper is a color image.

  If the result of determination in step S406 is that the print image data is a color image (YES in step S406), the inspection control processing is determined as sequential processing (step S407), and the process proceeds to step S409. In step S407, the timing of performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is adjusted so that the process is sequentially performed when the color image is positively determined. Corresponds to mediation means.

  On the other hand, if the result of determination in step S406 is that the print image data is not a color image (NO in step S406), the inspection control processing is determined to be parallel processing (step S408).

  As described above, when a negative determination is made, the timing for performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is adjusted so as to perform parallel processing.

  Then, the determined inspection control process is notified to the image formation control unit 206 (step S409), and this process ends.

  FIG. 7 is a flowchart showing a procedure of print image data generation processing executed by the image forming controller 201 in FIG.

  In FIG. 7, when a print instruction is issued from the LAN control unit 203 or the operation unit 205 (YES in step S411), the image inspection setting is received from the image inspection controller 210 (step S412). This image inspection setting indicates whether or not to perform image inspection.

  Next, it is determined whether or not image inspection is performed (step S413). If the result of determination in step S413 is that image inspection is not performed (NO in step S414), normal printing processing that is neither sequential processing nor parallel processing is performed (step S414), and this processing ends.

  On the other hand, when the image inspection is performed as a result of the determination in step S413 (YES in step S414), the above-described print setting notification is transmitted to the image inspection controller 210 (step S415). Thereafter, the inspection control process determined from the image inspection controller 210 is notified.

  Next, it is determined whether the notified inspection control process is a sequential process (step S416). As a result of the determination in step S416, when the notified inspection control process is a sequential process (YES in step S416), the print image data generation process is performed in a sequential process (step S418), and this process ends.

  On the other hand, as a result of the determination in step S416, when the notified inspection control processing is not sequential processing (NO in step S416), the print image data generation processing is performed in parallel processing (step S417), and this processing ends.

  When the above-described print image data generation processing is sequentially performed, generation of print image data and transfer to the image inspection controller 210 are performed all at once. On the other hand, when print image data generation processing is performed in parallel, generation of print image data and transfer to the image inspection controller 210 are performed page by page.

  FIG. 8 is a flowchart showing a procedure of image inspection processing executed by the image inspection controller 210 in FIG.

  In FIG. 8, print image data is received from the image forming controller 201 (step S501), and the reference image processing unit 213 processes the print image data (step S502). The reference image storage unit 222 stores the reference image obtained from the print image data by this image processing (step S503).

  On the other hand, the image formation control unit 206 controls the mechanism process control unit 209 to perform printing. By sequentially transporting the printed matter to the image inspection unit 103, the inspection scanner 217 scans the printed matter according to the accuracy level.

  Thereby, the scan image processing unit 218 acquires image data obtained by the scan (step S504). Next, the scan image processing unit 218 performs image processing on the image data obtained by the scan (step S505), and the scan image storage unit 221 stores the scan image obtained from the image data by this image processing (step S506).

  Next, the inspection control unit 216 transfers the reference image and the scanned image to the image comparison determination unit 220, so that the image comparison determination unit 220 performs image comparison determination (step S507).

  Next, the inspection control unit 216 notifies the image formation control unit 206 of the result (OK or NG) of the image comparison determination obtained by the image comparison determination unit 220 (step S508).

  Then, the inspection control unit 216 determines whether the image comparison determination result is OK (step S509). As a result of the determination in step S509, if the image comparison determination result is OK (YES in step S509), it is displayed on the inspection display unit 214 that the image inspection result is OK (step S510), and this process is terminated.

  On the other hand, as a result of the determination in step S509, if the image comparison determination result is NG (NO in step S509), it is displayed on the inspection display unit 214 that the image inspection result is NG (step S511), and this process ends. To do.

  FIG. 9 is a diagram showing an example of a screen displaying that the image inspection result is OK on the inspection display unit 214 in FIG.

  In FIG. 9, the result display area 801 indicates that the image inspection result is OK. Further, the scan image 802 displays the scan image stored by the scan image storage unit 221 in step S503. A confirmation button 803 is a button for the user to confirm. When the confirmation button 803 is pressed, this screen is erased as if the user confirmed the result.

  FIG. 10 is a view showing an example of a screen displaying that the image inspection result is NG on the inspection display unit 214 of FIG.

  FIG. 10 is a display example when the scan image is NG because there is a stain (black dot).

  In FIG. 10, the result display area 801 indicates that the image inspection result is NG. Similarly to FIG. 9, a scanned image 802 and a confirmation button 803 are also displayed.

  An enlarged display 903 enlarges the periphery of the pixel block that has become NG. Further, a stain 904 indicates a stain (black dot) generated due to printing failure.

  Reference numeral 905 denotes a button for the user to confirm, and when the button 905 is pressed, the display is erased as if the user confirmed the result.

  FIG. 11 is a timing chart when image inspection processing is performed on five (5 pages) monochrome images by parallel processing.

  The timing chart in FIG. 11 shows the timing of print image data generation, printing, printed matter scanning, and image inspection processing, and the printing speed is 120 ppm and the interval between vertical lines is 100 ms. Further, the time required between sheets is included in the printing time for the sake of simplicity. The printing speed, the interval between vertical lines, and the time required between sheets are the same in the timing charts of FIGS.

  First, at the timing when the first print image data generation is completed, the image forming controller 201 starts generating the second print image data.

  In addition, the mechanism process control unit 209 starts printing the first sheet at the timing when the first print image data generation is completed.

  Furthermore, the first reference image processing is started at the timing when the first print image data generation is completed. The reference image processing in the timing chart includes both reception of the reference image by the inspection control unit 216 and reference image processing by the reference image processing unit 213. This reference image processing includes reception and reference image processing as well in the timing charts of FIGS. 12 and 13 described later.

  Next, the mechanism process control unit 209 starts printing the second sheet because the generation of the print image data for the second sheet is completed at the timing when the first sheet is printed.

  The inspection scanner 217 starts scanning the first printed matter at the timing when the first sheet is printed. The scan of printed matter in the timing chart includes the time for scan image processing in the scan image processing unit 218. The fact that this printed matter scan includes scan image processing is the same in the timing charts of FIGS.

  Next, the image comparison / determination unit 220 performs the first image inspection process at the timing when the first printed material scan is completed, and when this is completed, the first sheet printing and the image inspection process are completed. Similar to the first sheet, the process up to the fifth sheet is performed.

  As described above, the parallel processing performs print image data generation processing, print processing, scan image acquisition processing, reference image processing, and quality determination processing in parallel.

  FIG. 12 is a diagram showing a timing chart when image inspection processing is performed by sequentially processing five (5 pages) color images.

  In FIG. 12, since the image forming controller 201 performs the sequential processing, the image forming controller 201 first generates all five print image data and the reference image processing in the reference image processing unit 213 in a lump.

  After the print image data generation and the reference image processing are all finished, only printing performed by the mechanism process control unit 209, scanning of the printed matter by the inspection scanner 217, and image comparison determination by the image comparison determination unit 220 are performed one by one. Pipeline in parallel.

  First, at the timing when the first print image data generation is completed, the image forming controller 201 starts generating the second print image data.

  Also, the first reference image processing is started at the timing when the first print image data generation is completed.

  Since the generation of print image data for the second sheet has already been completed at the timing when the first reference image process is completed, the reference image processing unit 213 starts the second reference image process.

  Similarly, third print image data generation, reference image processing, fourth print image data generation, reference image processing, fifth print image data generation, and reference image processing are performed.

  Next, the mechanism process control unit 209 starts printing the first sheet at the timing when the fifth reference image processing is completed. Then, the mechanism process control unit 209 starts printing the second sheet at the timing when the first sheet is printed.

  The inspection scanner 217 starts scanning the first printed matter at the same timing when the first sheet is printed.

  Next, the image comparison / determination unit 220 performs the first image comparison / determination process at the timing when the second printed matter scan is completed, and when this is finished, the first sheet's printing and image inspection process are completed.

  Similarly to the first sheet, the second sheet is printed, the printed material is scanned, and the image comparison is determined. The third sheet is printed, the printed material is scanned, and the image is compared.

  Further, the fourth printing, printed matter scanning, and image comparison determination processing are performed, and the fifth printing, printed matter scanning, and image comparison determination processing are performed. This completes the printing and image inspection processing for five color images.

  As described above, in the sequential processing, the print processing, the scan image acquisition processing, and the quality determination processing are performed after the print image data generation processing and the reference image processing are performed.

  Here, the time charts of FIGS. 11 and 12 are compared. In the case of monochrome image printing and image inspection processing, the time required for reference image processing is relatively short because the processed image is a light monochrome image.

  Thus, if the total time of the reference image processing and the image comparison determination processing for the same page is equal to or shorter than the printing time, the image inspection processing can be performed following the printing speed as shown in FIG. 11, and the inspection result can be reflected in real time. it can.

  On the other hand, in the case of color image printing and image inspection processing, the amount of data processed by a color image is larger than that of a monochrome image, so the time required for reference image processing and reference image transfer is relatively long. End up.

  When the total time of the reference image processing and the image comparison determination processing for the same page exceeds the printing time, first, print image data generation and reference image processing are performed in advance as shown in FIG.

  Next, by performing printing, printed matter scanning, and image comparison / determination processing after the completion, image inspection processing can be performed following the printing speed, and inspection results can be reflected in real time.

  FIG. 13 is a timing chart when the image inspection process is performed in parallel when the total time of the reference image process and the image comparison determination process exceeds the printing time.

  This timing chart does not implement the present invention, and shows an example of parallel processing when the total time of the reference image processing and the image comparison determination processing is equal to or longer than the printing time.

  In FIG. 13, first print image data generation, printing, printed material scan, reference image processing, and image comparison determination processing are performed. In the same manner, print image data generation for up to the fifth sheet, printing, printed matter scan, reference image processing, and image comparison determination processing are performed.

  As described above, when the total time of the reference image processing and the image comparison determination processing for the same sheet exceeds the printing time, the inspection speed cannot follow the printing speed.

  Then, as the number of sheets increases, a difference occurs between the timing when printing is finished and the timing when the inspection result is output, and the inspection result cannot be reflected in real time.

  According to the above-described embodiment, when the print image data is a color image that requires processing time as compared with the case of a monochrome image, the inspection control processing is determined as sequential processing. In comparison, it is possible to suppress stagnating printed matter waiting for inspection.

[Second Embodiment]
In the second embodiment, a modification of the arbitration process in FIG. 6 will be described. Other configurations are the same as those of the first embodiment.

  FIG. 14 is a flowchart showing the procedure of the arbitration process in the second embodiment executed by the image inspection controller 210 in FIG.

  14 is substantially different from FIG. 6 in that step S1308 is newly added. The print setting received in step S1305 is information indicating whether the print image data is a color image or a monochrome image, but information indicating the print resolution of the print image data is further added.

  Therefore, if the result of determination in step S1306 is that the print image data is not a color image (NO in step S1306), it is determined whether the print resolution is 1200 dpi or higher (step S1308). Step S1308 corresponds to a determination unit that determines whether or not the printing resolution in the printing process is equal to or higher than a predetermined resolution. The predetermined resolution is 1200 dpi in the present embodiment. However, since the resolution varies depending on the performance of the apparatus, a resolution applicable to the apparatus is appropriately determined through experiments or the like.

  If the result of determination in step S1308 is that the print resolution is 1200 dpi or higher (YES in step S1308), the inspection control processing is determined as sequential processing (step S1307).

  In step S1307, when an affirmative determination is made that 1200 dpi or more, the timing for performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is adjusted so as to perform sequential processes. Corresponds to mediation means.

  On the other hand, if the result of determination in step S1308 is that the print resolution is less than 1200 dpi (NO in step S1308), the inspection control processing is determined to be parallel processing (step S1309). As described above, when a negative determination is made, the timing for performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is adjusted so as to perform parallel processing.

  According to the above-described embodiment, when the print resolution is equal to or higher than the predetermined resolution, the inspection control process is determined as the sequential process, so that the printed matter waiting for the inspection stays in comparison with the case where the parallel processing is performed. Can be suppressed.

[Third Embodiment]
In the third embodiment, a modification of the arbitration process in FIG. 6 will be described. Other configurations are the same as those of the first embodiment.

  FIG. 15 is a flowchart showing the procedure of the arbitration process in the third embodiment executed by the image inspection controller 210 in FIG.

  15 is substantially different from FIG. 6 in that the content of determination in step S1406 is different and step S1408 is newly added. The print setting received in step S1405 is information indicating whether the print image data is a color image or a monochrome image, but information indicating the print resolution of the print image data is further added.

  In the third embodiment, when the RIP processing unit 204 develops RIP data, a low-resolution thumbnail image to be displayed on the display unit of the operation unit 205 may be generated. It is.

  Therefore, it is determined whether or not the image forming controller 201 has a thumbnail image corresponding to the print image data to be subjected to the image inspection process indicated by the print setting received in step S1405 (step S1406).

  If the result of determination in step S1406 is that there is no thumbnail image (NO in step S1407), the inspection control processing is determined as sequential processing (step S1407).

  On the other hand, if the result of determination in step S1406 is that a thumbnail image exists (YES in step S1407), it is determined whether or not the accuracy level in the inspection setting input in step S1401 is standard (step S1408). Step 1408 corresponds to a determination unit that determines whether or not the number of pixels included in the region is equal to or greater than a predetermined value. In the case of the present embodiment, this predetermined value is the number of pixels when the accuracy level is high resolution, but differs depending on the performance of the device. Determine as appropriate.

  If it is determined in step S1408 that the accuracy level is not standard and the resolution is high (NO in step S1408), the process proceeds to step S1407. Therefore, step S1407 corresponds to the arbitrating means. That is, when an affirmative determination is made that the number of pixels included in the region is equal to or greater than a predetermined value, a print image data generation process, a reference image process, a print process, a scan image acquisition process, and a sequential process are performed. Arbitrate the timing of quality judgment processing.

  On the other hand, if the result of determination in step S1408 is that the accuracy level is standard (YES in step S1408), the inspection control processing is determined to be parallel processing (step S1409). As described above, when a negative determination is made, the timing for performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is adjusted so as to perform parallel processing.

  According to the above-described embodiment, when the number of pixels included in the region is equal to or greater than a predetermined value, the inspection control process is determined as a sequential process. It is possible to prevent the waiting printed matter from staying.

[Fourth Embodiment]
In the fourth embodiment, a modification of the arbitration process in FIG. 6 will be described. Other configurations are the same as those of the first embodiment.

  FIG. 16 is a flowchart showing the procedure of the arbitration process in the fourth embodiment executed by the image inspection controller 210 in FIG.

  16 is substantially different from FIG. 6 in that step S1506 is added and the determination content in step S1507 is different. The print setting received in step S1505 is information indicating whether the print image data is a color image or a monochrome image, but information indicating the print resolution of the print image data is further added.

  Therefore, first, the image inspection processing time is calculated (step S1506). The image inspection processing in the image inspection processing time indicates reference image processing and image comparison determination processing. The calculation of the image inspection processing time is determined almost uniquely by the inspection setting input in step S1501 and the contents of the print instruction to the image forming controller 201.

  Next, it is determined whether or not the image inspection processing time is equal to or longer than the printing time (step S1507). Step S1507 corresponds to a determination unit that determines whether the time required for the reference image processing and the quality determination processing is equal to or longer than the time required for the printing process.

  If it is determined in step S1507 that the image inspection processing time is equal to or longer than the printing time (YES in step S1507), the inspection control processing is determined as sequential processing (step S1508). In step S1508, when an affirmative determination is made in step S1507, the timing of performing the print image data generation process, the reference image process, the print process, the scanned image acquisition process, and the quality determination process is adjusted so as to perform sequential processes. Corresponds to mediation means.

  On the other hand, if the result of determination in step S1507 is that the image inspection processing time is less than the printing time (NO in step S1507), the inspection control processing is determined as parallel processing (step S1509). As described above, when a negative determination is made, the timing for performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is adjusted so as to perform parallel processing.

  According to the above-described embodiment, when the time required for the reference image processing and the quality determination processing is equal to or longer than the time required for the printing processing, the inspection control processing is determined to be sequential processing. In comparison, it is possible to suppress the retention of printed matter waiting for inspection.

  The second to fourth embodiments described above are modifications to the determination method of the inspection control process in the first embodiment. In addition to the above-described modification, for example, the inspection control process may be determined based on the communication speed of the connected network. For example, if the communication speed is higher than a predetermined speed, the inspection control process is determined as parallel processing, and if the communication speed is lower than the predetermined speed, the inspection control process is determined as sequential processing.

  In addition, as described with reference to FIG. 1, the image printing unit, the image inspection unit, and the finishing unit are physically separable, and therefore, each unit can be connected to more models. Therefore, the inspection control process may be determined according to the printing speed of the image printing unit. For example, if the printing speed of the image printing unit is higher than a predetermined speed, the inspection control processing is determined as parallel processing, and if the printing speed is less than the predetermined speed, the inspection control processing is determined as sequential processing. .

  Further, the inspection control process may be determined based on whether or not a print process that reduces the performance of the image processing apparatus is performed, such as when multiple pages are printed on a single sheet of paper or when an inserter is used. Good. For example, when print processing that lowers the performance of the image processing apparatus is performed, the inspection control processing may be determined as parallel processing, and otherwise, the inspection control processing may be determined as parallel processing.

  According to the embodiment described above, it is possible not only to suppress stagnating printed matter waiting for inspection but also to display the inspection result on the inspection display unit 214 in real time.

(Other embodiments)
The present invention is also realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, etc.) of the system or apparatus reads the program code. It is a process to be executed. In this case, the program and the storage medium storing the program constitute the present invention.

DESCRIPTION OF SYMBOLS 100 Image processing system 101 Image processing apparatus 102 Image printing unit 103 Image inspection unit 104 Finishing unit 204 RIP processing part 205 Operation part 206 Image formation control part 207, 212 Memory part 208 Print image processing part 209 Mechanism process control part 211 Inspection operation part 213 Reference image processing unit 214 Inspection display unit 215 Print inspection processing timing arbitration unit 216 Inspection control unit 217 Inspection scanner 218 Scan image processing unit 220 Image comparison determination unit 221 Scan image storage unit 222 Reference image storage unit

Claims (13)

Generation means for performing print image data generation processing for generating print image data for printing an image on a recording medium;
Printing means for performing a printing process for printing an image indicated by the print image data generated by the generation means on the recording medium;
A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading an image from the recording medium on which the image is printed by the printing unit;
Reference image generation means for performing reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition means from the print image data generated by the generation means;
A quality determination for determining the quality of the image printed on the recording medium by the printing unit by comparing the scanned image acquired by the scanned image acquiring unit and the reference image generated by the reference image generating unit. Quality judgment means for processing;
Determining means for determining whether an image printed on the recording medium is a color image by the printing process;
When a positive determination is made by the determination unit, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An image processing apparatus comprising: mediation means for mediating timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. Generation means for performing print image data generation processing for generating print image data for printing an image on a recording medium;
Printing means for performing a printing process for printing an image indicated by the print image data generated by the generation means on the recording medium;
A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading an image from the recording medium on which the image is printed by the printing unit;
Reference image generation means for performing reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition means from the print image data generated by the generation means;
A quality determination for determining the quality of the image printed on the recording medium by the printing unit by comparing the scanned image acquired by the scanned image acquiring unit and the reference image generated by the reference image generating unit. Quality judgment means for processing;
A discriminating means for discriminating whether or not a printing resolution in the printing process is equal to or higher than a predetermined resolution;
When a positive determination is made by the determination unit, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An image processing apparatus comprising: mediation means for mediating timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. Generation means for performing print image data generation processing for generating print image data for printing an image on a recording medium;
Printing means for performing a printing process for printing an image indicated by the print image data generated by the generation means on the recording medium;
A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading an image from the recording medium on which the image is printed by the printing unit;
Reference image generation means for performing reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition means from the print image data generated by the generation means;
By dividing each of the scan image acquired by the scan image acquisition unit and the reference image generated by the reference image generation unit into a plurality of regions, and comparing the density of pixels included in the divided regions, Quality determination means for performing a quality determination process for determining the quality of an image printed on the recording medium;
A discriminating means for discriminating whether or not the number of pixels included in the region in the quality judgment processing is a predetermined value or more;
When a positive determination is made by the determination unit, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An image processing apparatus comprising: mediation means for mediating timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. Generation means for performing print image data generation processing for generating print image data for printing an image on a recording medium;
Printing means for performing a printing process for printing an image indicated by the print image data generated by the generation means on the recording medium;
A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading an image from the recording medium on which the image is printed by the printing unit;
Reference image generation means for performing reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition means from the print image data generated by the generation means;
A quality determination for determining the quality of the image printed on the recording medium by the printing unit by comparing the scanned image acquired by the scanned image acquiring unit and the reference image generated by the reference image generating unit. Quality judgment means for processing;
Determining means for determining whether the time required for the reference image processing and the quality determination processing is equal to or longer than the time required for the print processing;
When a positive determination is made by the determination unit, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An image processing apparatus comprising: mediation means for mediating timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing.   When a negative determination is made by the determination unit, the arbitration unit performs the print image data generation process, the print process, the scan image acquisition process, the reference image process, and the quality determination process in parallel. 5. The timing of performing the print image data generation process, the reference image process, the print process, the scan image acquisition process, and the quality determination process is arbitrated. 6. Image processing apparatus. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand A quality determination unit that performs a quality determination process for determining a quality of an image printed on the recording medium by the printing unit by comparing the reference images generated by ,
A determination step of determining whether an image printed on the recording medium is a color image by the printing process;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. A control method comprising: an arbitration step that mediates timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand A quality determination unit that performs a quality determination process for determining a quality of an image printed on the recording medium by the printing unit by comparing the reference images generated by ,
A determination step of determining whether or not a printing resolution in the printing process is equal to or higher than a predetermined resolution;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. A control method comprising: an arbitration step that mediates timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand The quality of the quality determination process for determining the quality of the image printed on the recording medium by dividing each of the reference images generated by the above into a plurality of areas and comparing the density of the pixels included in the divided areas An image processing apparatus control method comprising a determination unit,
A determination step of determining whether or not the number of pixels included in the region in the quality determination process is greater than or equal to a predetermined value;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. A control method comprising: an arbitration step that mediates timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand A quality determination unit that performs a quality determination process for determining a quality of an image printed on the recording medium by the printing unit by comparing the reference images generated by ,
A determination step of determining whether the time required for the reference image processing and the quality determination processing is equal to or longer than the time required for the print processing;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. A control method comprising: an arbitration step that mediates timing for performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand A control method for an image processing apparatus, comprising: a quality determination unit that performs a quality determination process for determining a quality of an image printed on the recording medium by the printing unit by comparing the reference images generated by A program for executing the program,
The control method is:
A determination step of determining whether an image printed on the recording medium is a color image by the printing process;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An arbitration step for arbitrating the timing of performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand A control method for an image processing apparatus, comprising: a quality determination unit that performs a quality determination process for determining a quality of an image printed on the recording medium by the printing unit by comparing the reference images generated by A program for executing the program,
The control method is:
A determination step of determining whether or not a printing resolution in the printing process is equal to or higher than a predetermined resolution;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An arbitration step for arbitrating the timing of performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand The quality of the quality determination process for determining the quality of the image printed on the recording medium by dividing each of the reference images generated by the above into a plurality of areas and comparing the density of the pixels included in the divided areas A program for causing a computer to execute a control method of an image processing apparatus including a determination unit,
The control method is:
A determination step of determining whether or not the number of pixels included in the region in the quality determination process is greater than or equal to a predetermined value;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An arbitration step for arbitrating the timing of performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing. A generation unit that performs print image data generation processing that generates print image data for printing an image on a recording medium, and a print processing that prints an image indicated by the print image data generated by the generation unit on the recording medium A scan image acquisition unit that performs a scan image acquisition process of acquiring a scan image indicating the image printed on the recording medium by reading the image from the recording medium on which the image is printed by the printing unit; A reference image generation unit that performs reference image processing for generating a reference image for comparison with the scan image acquired by the scan image acquisition unit from the print image data generated by the generation unit; and the scan image acquisition The scanned image acquired by the means, and the reference image generating hand A control method for an image processing apparatus, comprising: a quality determination unit that performs a quality determination process for determining a quality of an image printed on the recording medium by the printing unit by comparing the reference images generated by A program for executing the program,
The control method is:
A determination step of determining whether the time required for the reference image processing and the quality determination processing is equal to or longer than the time required for the print processing;
When an affirmative determination is made in the determination step, the print image data generation process and the reference image process are performed, and then the print process, the scanned image acquisition process, and the quality determination process are performed. An arbitration step for arbitrating the timing of performing image data generation processing, the reference image processing, the printing processing, the scanned image acquisition processing, and the quality determination processing.

Images