Image inspection device, image inspection method, and image inspection program
The image inspection apparatus facilitates efficient image inspection by generating reference images in parallel with image formation, addressing the complexity and time issues of existing methods.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- KONICA MINOLTA INC
- Filing Date
- 2026-03-25
- Publication Date
- 2026-06-25
Smart Images
Figure 2026104869000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to an image inspection apparatus, an image inspection method, and an image inspection program.
Background Art
[0002] Conventionally, the quality of a printed matter has been inspected by comparing a pre-registered reference image with an inspection image obtained by reading the printed matter to be inspected. For example, in Patent Document 1, in the case of the proof mode for confirming the finished product, an image derived from the original image used for printing is used as the reference image. In subsequent actual printing, when reading a printed matter that has been visually confirmed by the user to have no abnormality in the proof mode, the read image data obtained at that time is used. In the case of the proof mode for confirming the finished product, an image derived from the original image used for printing is used as the reference image. In subsequent actual printing, when reading a printed matter that has been visually confirmed by the user to have no abnormality in the proof mode, the read image data obtained at that time is used. In subsequent actual printing, when reading a printed matter that has been visually confirmed by the user to have no abnormality in the proof mode, the read image data obtained at that time is used.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] In the technique of Patent Document 1, the user's processing for generating the reference image used for actual printing is complicated, and it is necessary to prepare the reference image in advance and then execute the actual printing. In the technique of Patent Document 1, the user's processing for generating the reference image used for actual printing is complicated, and it is necessary to prepare the reference image in advance and then execute the actual printing.
[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide an image inspection apparatus, an image inspection method, and an image inspection program that can further shorten the time required for the processing from the generation of the reference image to the image inspection as compared with the prior art. The present invention has been made in view of the above circumstances, and an object thereof is to provide an image inspection apparatus, an image inspection method, and an image inspection program that can further shorten the time required for the processing from the generation of the reference image to the image inspection as compared with the prior art. The present invention has been made in view of the above circumstances, and an object thereof is to provide an image inspection apparatus, an image inspection method, and an image inspection program that can further shorten the time required for the processing from the generation of the reference image to the image inspection as compared with the prior art.
Means for Solving the Problems
[0006] The above objectives of the present invention are achieved by the following means.
[0007] (1) A reference image generation unit that generates a reference image used for inspecting an image formed on a recording medium, , An image inspection unit that inspects the image formed on the recording medium based on the aforementioned reference image, A reception unit that accepts the specification of the timing for generating the reference image, An image inspection device having the following features.
[0008] (2) According to the generation timing received by the reception unit, the reference image generation unit generates a base The image inspection apparatus according to (1) above, comprising a control unit for controlling the generation of a quasi-image.
[0009] (3) The image forming unit further comprises an image forming unit that forms the image on the recording medium based on the original image. , The generation timing includes a first timing which is before image formation by the image forming unit, Image examination as described in (1) above, including a second timing different from the first timing. Device.
[0010] (4) The second timing includes the timing during image formation by the image forming unit. , the image inspection device described in (3) above.
[0011] (5) Based on the acceptance of the second timing specification, the original image A control unit that controls the transmission to the reference image generation unit and the image forming unit. The image inspection apparatus according to (3) or (4) above, further comprising the above.
[0012] (6) The control unit generates the reference image by the reference image generation unit and the image formation The unit is made to form the image on the recording medium in parallel, as described in (5) above. Inspection device.
[0013] (7) A control unit that controls generation of a reference image by the reference image generation unit according to the generation timing received by the reception unit. The control unit determines whether generation of the reference image for the x-th page by the reference image generation unit has completed before inspection of the x-th page when the designation of the second timing is received, for the image inspection device according to (3) or (4) above. When the control unit receives the designation of the second timing, when performing inspection on a sheet on which an image is formed based on the original image of the x-th page out of 1 to n pages by the image inspection unit, whether generation of the reference image for the x-th page by the reference image generation unit has completed, the image inspection device according to (3) or (4) above.
[0014] (8) A control unit that controls generation of a reference image by the reference image generation unit according to the generation timing received by the reception unit. The control unit determines whether the reference image for the x-th page by the reference image generation unit has already been generated and storage of the reference image in the storage unit has completed before inspection of the x-th page when the designation of the second timing is received, for the image inspection device according to (3) or (4) above. When the control unit receives the designation of the second timing, when performing inspection on a sheet on which an image is formed based on the original image of the x-th page out of 1 to n pages by the image inspection unit, the control unit determines whether the reference image for the x-th page by the reference image generation unit has already been generated, and whether storage of the reference image in the storage unit has completed, before inspection of the x-th page. the image inspection device according to (3) or (4) above.
[0015] (9) A control unit that controls generation of a reference image by the reference image generation unit according to the generation timing received by the reception unit, wherein when the control unit receives the designation of the first timing, before the image forming unit forms an image, it is used for inspection by the image inspection unit. Registered Determine whether a completed reference image has been specified, as described in (3) or (4) above. Image inspection device.
[0016] (10) Reference image generation for generating reference images used for inspecting images formed on recording media. Step and, Image inspection step: Inspecting the image formed on the recording medium based on the reference image. and, A receiving station that accepts the specification of the timing for generating the reference image in the aforementioned reference image generation step. Top, Image inspection methods, including those mentioned above.
[0017] (11) Reference image generation system for generating reference images used for inspecting images formed on recording media. Step and, Image inspection step: Inspecting the image formed on the recording medium based on the reference image. and, A receiving station that accepts the specification of the timing for generating the reference image in the aforementioned reference image generation step. Top, An image inspection program that causes a computer to perform a process that includes [specific details]. [Effects of the Invention]
[0018] The image inspection apparatus according to the present invention generates a reference image used for inspecting an image formed on a recording medium. A reference image generation unit and a unit that detects the image formed on the recording medium based on the reference image. It comprises an image inspection unit that performs the inspection and a reception unit that receives the specification of the timing for generating the reference image. This method shortens the time required for processing from the generation of reference images to image inspection. Cut. [Brief explanation of the drawing]
[0019] [Figure 1]This figure shows a schematic configuration of a printing system including an image inspection device according to the first embodiment. [Figure 2] This is a block diagram showing the hardware configuration of an image inspection device. [Figure 3] This is a schematic diagram illustrating the processing of image inspection. [Figure 4] This is a schematic diagram showing the flow of each data. [Figure 5] This schematic diagram shows the time-series process of acquiring the original image, generating the reference image, forming the inspection image, and inspecting the inspection image when the first timing is specified. [Figure 6A] This is an example of an operation screen used to explain the second timing specification. [Figure 6B] This is an example of the operation screen that appears following Figure 6A. [Figure 6C] This is an example of an operation screen used to explain the specification of the first timing. [Figure 6D] This is an example of the operation screen that appears following Figure 6C. [Figure 6E] This is an example of the operation screen that appears following Figure 6D. [Figure 6F] This is an example of an operation screen used to explain the specification of the first timing. [Figure 6G] This is an example of the operation screen that appears following Figure 6F. [Figure 7] This is a flowchart showing the processing steps for the image inspection method. [Figure 8A] This flowchart shows the processing procedure in the first inspection mode, which follows Figure 7. [Figure 8B] This is a subroutine flowchart showing the process for determining the completion of the reference image. [Figure 9] This flowchart shows the processing procedure in the second inspection mode, which follows Figure 7. [Figure 10] This is a subroutine flowchart illustrating the process of generating a reference image. [Figure 11] This is a subroutine flowchart illustrating the image inspection process. [Modes for carrying out the invention]
[0020] Embodiments of the present invention will be described below with reference to the attached drawings. However, the present invention The scope is not limited to the embodiments disclosed. The same reference numerals are used, and redundant explanations are omitted. Provided from one or more embodiments of the present invention. The advantages and features are fully understood from the detailed description and attached drawings provided below. Furthermore, the attached drawings are provided for illustrative purposes only and do not represent the scope of the present invention. It is not intended to be a rule or regulation.
[0021] Figure 1 shows an image inspection apparatus 100 and a printing system 100 including the same according to the first embodiment. Figure 1 shows the schematic configuration of 0. Figure 2 shows the hardware configuration of the image inspection device 100. This is a lock diagram. As shown in Figure 1, the printing system 1000 consists of a terminal device 80 and one or more The above image inspection device 100 is included, and these are connected by a network 90.
[0022] The terminal device 80 is, for example, a personal computer, a tablet device, or a smartphone. These are possible. Terminal device 80 includes a printer for converting document data into a print job. The driver is installed. Terminal device 80 operates the image inspection device 100. It is used by users such as operators. The printer driver responds to user instructions. Therefore, the print controller 13 of the image inspection device 100 (see Figure 2 below) can handle this. It generates print jobs in a specific format and sends the print jobs to the image inspection device via the network 90. Send to 100. The terminal device 80 is also equipped with a display and shows the inspection results of the printed material (inspection). The product results (good / defective products), images of defective printed materials, etc., can be displayed.
[0023] A print job is, for example, a PDL (Page Description Language). e) Print data in format (hereinafter also referred to as original image data or original image) and job settings Includes fixed information (hereinafter referred to as job settings). The original image is, for example, from page 1 to page n. This includes the original image. Job settings include, for example, the number of pages, the number of copies, and the type of paper (recording medium). This includes print settings such as size, basis weight, and single-sided / double-sided printing. Job settings also include inspection criteria. The number of items is included. The inspection conditions include whether or not image inspection is performed (inspection setting on / off), and image inspection If "Yes" is selected, the types of the first and second inspection modes are also included. This may include inspection area specification information (described later). Furthermore, in the second inspection mode, The path information (file directory information) that specifies the file of the registered reference image to be used is Included. Users can enable inspection (turn on inspection settings) in the printing system 1. An image inspection instruction can be issued for 000. The inspection conditions are set via the printer driver. Settings can be configured via the operation screen displayed by the user (for example, Figure 6A described later).
[0024] (Image inspection device 100) The image inspection device 100 is also called an image forming system. The image inspection device 100 is mutual The image forming apparatus 10, paper feeder 20, and inspection unit 3 are mechanically and electrically connected to it. This includes a purging device 40 and a post-treatment device 50.
[0025] (Overview of inspection unit 30) Details of the inspection unit 30 will be described later, but the inspection unit 30 is a recording medium (paper It has a reference image generation unit 311 that generates a reference image used for inspecting the image formed on ). The reference image generation unit 311 generates a reference image based on the original image. Also, the inspection unit 30 has an image inspection unit 312 that inspects the image formed on the paper based on a reference image. The image forming apparatus 10 (image forming unit 16) forms an image on paper based on the original image. The image inspection unit 312 reads the image on the paper based on the original image and then reads the inspection image obtained. By comparing it with a reference image generated based on the same original image, the image on the paper can be inspected. ru.
[0026] (Image forming apparatus 10) The image forming apparatus 10 processes the paper that has been fed and transported from the upstream paper feeder 20, Image formation is performed. The image forming apparatus 10 also processes the paper fed from its paper feeding section. Then, image formation is performed.
[0027] As shown in Figure 2, the image forming apparatus 10 consists of a main unit control unit 11, a storage unit 12, and a print control unit. Roller 13, paper feeding unit 14, transport unit 15, image forming unit 16, operation panel 17, and communication unit It comprises 19. These components are connected via signal lines such as buses for exchanging signals. They are connected to each other. Note that in Figure 2, the storage unit 12 and the printer in the image forming apparatus 10 are shown. The connection lines to some components such as the controller 13 have been omitted. Similarly, some connecting lines between components have been omitted.
[0028] (Main unit control 11) The main control unit 11 is composed of a CPU, ROM, RAM, etc., and the ROM and the memory described later By executing the program stored in section 12, various processes are performed and the program Therefore, it controls each part of the device and performs various calculations. The main control unit 11 is the printer control unit. 111, Inspection unit control unit 112, Other device control unit 113, Timing specification reception unit 115 It functions as a data transmission unit 116 and an inspection area reception unit 117. Details of each sub-function This will be described later. The main control unit 11 works in cooperation with the control unit 31 of the inspection unit 30, etc., to perform image inspection. This controls the entire device 100.
[0029] (Storage unit 12) The memory unit 12 is an auxiliary memory such as a hard disk that stores various programs and data in advance. It consists of memory units. Furthermore, memory unit 12 also functions as page memory (see memory unit 32 described later). (The same applies to the other.)
[0030] (Print controller 13) The print controller 13 receives an indicator from the terminal device 80 via the network 90. The system analyzes the print job, performs processes such as color conversion, screening, and rasterization, and then processes the bit A tomap-formatted original image is generated. The generated original image is transmitted to the control unit 31. The print controller 13 functions as a document image acquisition unit.
[0031] The print controller 13 receives print jobs from terminal devices 80, etc., via the communication unit 19. Receive. The received print job contains the original image (also called the original image data) Print data (mainly in PDL format) and job information describing print settings such as the type of paper to be used. The report includes the following. The print controller 13 prints the print data to the page based on the print settings. Rasterization (RIP) is performed to convert the data into a bitmap format. The processed RIP image is temporarily stored in the image memory inside the print controller 13. The RIP image in the image memory is stored in the compressed memory area of the page memory of the storage unit 12. It is saved temporarily. During normal printing, the RIP image is saved in the compressed memory area. The data is decompressed by a compression / decompression IC and then processed through a writing unit to form an image as the original document image. It is sent to section 16 and printing is performed.
[0032] (Paper feeding section 14, transport section 15) The paper feeding unit 14 is equipped with multiple paper trays. The transport unit 15 is equipped with a transport path. The path consists of multiple pairs of conveying rollers provided along the conveying path, and these pairs of conveying rollers It includes a drive motor (not shown) that drives it. The paper feed unit 14 is loaded in the paper feed tray. It is equipped with a feed roller that feeds out the top sheet of paper among the multiple sheets placed inside the paper tray. The paper is fed one sheet at a time to the downstream transport path.
[0033] (Image forming unit 16) The image forming unit 16 forms an image, for example, by an electrophotographic method. The image forming unit 16 is Y Each of the basic colors (yellow), M (magenta), C (cyan), and K (black) It consists of a corresponding writing section (laser exposure section), a photosensitive drum, and toners and carriers of each color. The system includes a developing unit that contains a two-component developer, etc. The image forming unit 16 also includes an intermediate turntable. It comprises a photo-receiving belt, a secondary transfer unit, and a fixing unit. Each color developer processes the photoreceptor drum. The formed toner images are superimposed on an intermediate transfer belt and transported in the secondary transfer section. The toner is transferred to the paper. The toner image on the paper is heated and pressurized in the fuser unit downstream. It is then fixed onto the paper.
[0034] (Control panel 17) The control panel 17 includes a touchscreen, numeric keypad, start button, stop button, etc. The control panel 17 displays the status of the image forming apparatus 10 or the image inspection apparatus 100. It is used for inputting various settings and instructions from the user. Also, the inspection unit 30 The system displays the test results and accepts input for setting test conditions and execution instructions.
[0035] (Communications Section 19) The communication unit 19 communicates with various devices such as PCs on the network, or with other devices 20, 30, etc. It is an interface for that purpose.
[0036] (Sub-functions 111-117) (Printer control unit 111) When a print job is input, the printer control unit 111 processes the print job of the input print job. The print job is executed based on the job configuration information (hereinafter referred to as "job configuration"). The job involves the control panel 17 and terminal equipment such as a network-connected PC operated by the user. The input is generated based on instructions sent from the 80, etc. Additionally, the job settings include print settings and inspection conditions. This includes items. Print settings include double-sided / single-sided printing, paper type, post-processing conditions, etc. Details regarding the inspection conditions will be described later, but for example, they can be set using the operation screen shown in Figure 6A below. ru.
[0037] The printer control unit 111 controls the paper feeding unit 14 and the transport unit 15, thereby controlling the paper feeding It controls paper transport. The printer control unit 111 also controls the image forming unit 16 and sets An image is formed on the paper according to the image formation conditions.
[0038] The inspection unit control unit 112 receives an execution instruction request (inspection instruction) from the printer control unit 111. The inspection unit 30 is controlled accordingly.
[0039] The other device control unit 113 controls the paper feed device 20, the purge device 40, and the post-processing device 50. The control unit 113 communicates with the paper feeder 20 to determine which paper to use. It transmits and receives information such as tray and paper transport timing. The other device control unit 113 communicates to the purge device 40. Paper transport timing, specification of main and sub transport paths for the paper to be transported, and post-processing device 5 Sends post-processing setting information for setting to 0, etc.
[0040] (Timing specification reception unit 115) The timing specification reception unit 115 accepts the specification of the generation timing of the reference image. The control unit 11 generates a reference image based on the received generation timing, using the reference image generation unit 311. It controls the generation of images or the generation timing. The generation timing is a first timing and This includes a second timing that is different from the first timing. The first timing is the image forming device This is before image formation by the device 10 (or image forming unit 16). The second timing is, for example, Image formation is in progress. More specifically, image formation, and based on multi-page manuscript images. When generating a reference image, the generation of the reference image is started while the image is being formed. , of the multi-page document image, the paper feeding section 14 for the first page of the image formation paper From the start of paper feeding until the image formation by the image forming unit 16 on the last page of paper is completed This continues until the image is removed from the image forming unit 16. An example of the first timing will be described later (Figure 5).
[0041] (First inspection mode, second inspection mode) In the embodiments described below, the timing of generating the reference image is at the first timing. Some image inspections support a second inspection mode. Also, the timing of generating the reference image is the second time The image inspection, which is timed, corresponds to the first inspection mode. It accepts the first and second inspection modes. Examples will be discussed later (Figure 4A, etc.).
[0042] In the first examination mode, the system can accept instructions to perform the examination before the generation of the reference image is complete. It can also be said that... In the first inspection mode, the image forming unit 16 based on the original image processes the paper... In parallel with the image formation processing of the image to be inspected, the reference image generation unit 31 generates a reference image based on the same original image. The reference image generation process according to step 1 is executed.
[0043] In the second examination mode, after the process of generating the reference image is completed, the instruction to perform the examination is received. It can also be said that this is possible. In the second inspection mode, the reference image generation unit 31 is generated based on the original image. The reference image generation process according to step 1 is executed, and then an instruction to perform an inspection using this image is received. The inspection is performed by doing so. Alternatively, in the second inspection mode, a reference image that has already been registered is used. The test is performed. In the latter case, a new reference image is generated and registered for the test, This includes both cases where a registered reference image is reused.
[0044] (Data transmission unit 116) The data transmission unit 116 transmits the original image to the image forming unit 16 and the inspection unit 30 (especially the reference image). It transmits to the image generation unit 311). In particular, the data transmission unit 116 performs the inspection in the first inspection mode. In response to the receipt, the original image is processed by the image forming unit 16 and the inspection unit 30 (especially the reference image processing unit). It is sent to the adult section 311). For example, in response to acceptance of the first inspection mode inspection execution, data The transmission unit 116 immediately sends the original image to both the image forming unit 16 and the reference image generation unit 311. They are transmitted simultaneously. In addition, the data transmission unit 116 receives the request to execute the first inspection mode. Accordingly, the original image is transmitted to the image forming unit 16. The data transmission unit 116 also receives the second reception. In response to the department's acceptance of the request to perform inspection in the second inspection mode, the original image is sent to the image forming unit 16. I believe.
[0045] (Inspection area reception section 117) The inspection area reception unit 117 (a) designation of inspection exclusion areas, and (b) designation of inspection areas ( The following information will be collectively referred to as "inspection area specification information" and will be accepted. The attachment unit 117 transmits the received inspection area specification information to the reference image generation unit 311. The area specification information is defined along the target area range (main scanning direction (X direction) and sub-scanning direction (Y direction)). It is described by its XY coordinate position and its contents. The area range is, for example, a rectangular area. (a (b) Areas designated as inspection exclusion areas will not be subject to inspection. The designated area will be subject to inspection. In the area designated as an inspection area, a different type of inspection will be performed than usual. This is also possible. For example, if the original image contains a photograph of a face, and the area containing the skin of the face is treated as follows: The inspection level of the barcode is set strictly. Also, when specifying the inspection area, the barcode There are specific requirements. The original image may contain barcodes (1D, 2D), in this case. In the inspection area where a barcode is specified, the image within the inspection area is decoded. Next, we check if the barcode printing is correct.
[0046] (Paper feeder 20) The paper feeding device 20 shown in Figures 1 and 2 has a paper feeding section and a transport section similar to those of the image forming apparatus 10. It is equipped with a transport unit, a paper feeding unit, a control unit, a storage unit, and a communication unit. (None of which are shown) are provided, and these are connected via signal lines such as buses for exchanging signals. They are interconnected.
[0047] (Inspection unit 30) Next, the inspection unit 30 will be described. As shown in Figure 2, the inspection unit 30 controls It comprises a control unit 31, a memory unit 32, an image reading unit 33, a transport unit 34, a communication unit 39, etc. Control unit 3 1. The storage unit 32, the transport unit 34, and the communication unit 39 are each part of the image forming apparatus 10 described above. The main control unit 11, storage unit 12, transport unit 15, and communication unit 19 have the same hardware configuration. Therefore, the explanation is omitted.
[0048] The image reading unit 33 is, for example, a CCD (Charge Coupled Device) The image sensor reads the paper (printed material) being transported along the transport path. The control unit 31 According to the reading instructions from the inspection unit control unit 112, the image is transported from the image forming apparatus 10. The scanner is controlled to read the image (inspection image) formed on the submitted paper. Furthermore, the control unit 31 processes the analog image signal output from the image reading unit 33. Various processes such as color processing, A / D conversion processing, and shading processing are performed to create a digital image (reading) Generate image data.
[0049] (Control Unit 31) The control unit 31 functions as a reference image generation unit 311 and an image inspection unit 312.
[0050] The reference image generation unit 311 is acquired by the image forming apparatus 10 (particularly the print controller 13). Based on the original image, the following various processes are performed to generate a reference image.
[0051] The reference image generation unit 311 and the image inspection unit 312 perform their respective reference image generation processes and image inspection processes. The inspection process may be configured with separate CPUs so that it can be performed in parallel. The control unit 31 is composed of multiple CPUs. Alternatively, the CPU of the control unit 31 is a multi-CPU. A multicore CPU is applied. If it is a multicore CPU, the reference image generation unit 311 is used. The formation and processing of inspection images in the image inspection unit 312 are assigned to a separate core, and separate cores are used. This allows for the simultaneous generation of reference images, the formation of inspection images, and the inspection process.
[0052] (Reference image generation unit 311) The reference image generation unit 311 performs various processing on the original image regarding position, resolution, color, etc. A reference image is generated by performing the following steps. The reference image generation unit 311, for example, combines the reference image and the read image ( To allow comparison between the content (content) of the inspection image, the content of the original image is extracted from the original image. The positional information of the content portion can be extracted and added to or embedded in the reference image. In other words, the reference image generated by the reference image generation unit 311 is used for image detection based on the reference image. Alignment information used to align reference images and inspection images when performing an examination (alignment It has (also called functional features). Furthermore, the alignment information includes image contour information and This includes reference information. Furthermore, the reference image generated by the reference image generation unit 311 is as described above. Based on the inspection area designation information received by the inspection area reception unit 117, the inspection area and inspection exclusion area It has region information related to the area. Furthermore, the reference image generation unit 311 has image reading unit 33( The scanner can adjust the resolution of the original image to match its resolution and generate a reference image. Furthermore, the reference image generation unit 311 uses the color space (for example, RG) adopted by the image reading unit 33. The color space of the original image data can be converted to match B) and a reference image can be generated.
[0053] The reference image generation unit 311 does not use the original image as is for the following reasons. In theory, the scanned image (inspection image) generated by reading the image formed on the paper is the original The image and content appear to match. However, the markings formed on the paper... When scanning images, variations in the paper transport path and the scanner can cause problems. Due to various factors such as misalignment of the reading position, color reproduction, and differences in paper type, the original image may differ from the image. This can lead to errors in the inspection image. Furthermore, the resolution of the scanner can also affect the result. Errors may occur in the original image. Therefore, simply comparing the inspection image with the original image is not advisable. Therefore, errors are likely to occur, and the inspection image can be examined by simply comparing the inspection image with the original image. It is not practical to inspect it. Therefore, in this embodiment, the reference image generation unit 311 generates an inspection image To allow for comparison with the image, various processing steps were applied to the original image in terms of position, resolution, color, etc. It is configured to generate a reference image and compare the reference image with the examination image. Because the inspection images are compared appropriately, the printed materials can be inspected with high accuracy.
[0054] (Image Inspection Department 312) The image inspection unit 312 performs image inspection based on reference images. More specifically, image inspection Unit 312 acquires a reference image and a read image, and compares the reference image and the read image page by page. By comparing them, the inspection image formed on the paper is examined.
[0055] Figure 3 is a schematic diagram illustrating the image inspection process. The image inspection unit 312, for example, For each pixel, the difference (error) in pixel values between the reference image and the inspection image is calculated, and according to the magnitude of the difference... The quality of the inspection images is determined. The difference is calculated page by page, object by object, or region. This can be done region by region. For example, if the difference is calculated page by page, then the pixels within each page... If the sum of the differences is less than the specified value, the inspection result will be "Good", and if the sum of the differences is less than the specified value If the value is greater than or equal to the specified value, the inspection result will be "defective". Also, for each object, When calculating the difference for each region, the difference is the pixel value within the selected object or region. The system can be configured to output either a "good" or "bad" inspection result depending on the total value.
[0056] The control unit 31 determines that the printed material is a good product if the inspection result of the inspection image is "good". If the inspection result of the inspection image is "defective," the printed material is determined to be a defective product. The result is sent to the main unit control unit 11.
[0057] (Purge device 40) The purging device 40 is provided with a branching section of the transport path, and the main transport path leads to the post-processing device 50. A sub-transport path is provided, leading to a purge tray (located above the purge device 40 in Figure 1). For example, paper that has been determined to be of poor quality by the inspection unit 30 is discharged into the purge tray. It will be released.
[0058] (Post-treatment device 50) The post-processing device 50 receives from the upstream image forming apparatus 10 according to the print job settings. The paper is processed and discharged. The post-processing device 50 has an output tray and a post-processing tray. It includes a processing unit and a transport path. The post-processing device 50 also includes a control unit, a storage unit, a transport unit and It is equipped with a communication unit (not shown in the figure), which uses signal lines such as buses to exchange signals. They are interconnected via a post-processing unit. The post-processing unit performs stapling on the image-formed paper. The process involves at least one post-processing step, such as punching, cutting, folding, and binding.
[0059] (Data flow in the image inspection device 100) Figure 4 shows the image formation and image inspection processes in the image inspection apparatus 100 shown in Figure 2. This is a schematic diagram showing the flow of data.
[0060] The main control unit 11 receives job settings (not shown) and original documents from the print controller 13. The image is retrieved. The source image is a RIP image, which is a rasterized version of the print data. The original image is saved in page memory. Job settings include information such as inspection conditions and print settings. This includes: The examination conditions include whether or not imaging tests are performed, and if imaging tests are performed, further This includes the types of the first and second inspection modes. Furthermore, in the second inspection mode, the type used This includes path information (file directory information) that specifies the file of the registered reference image. In the example in Figure 4, the first inspection mode is primarily selected as the job setting. Let me explain. Also, in the example in Figure 4, the original image is n print data from page 1 to page n. It will be explained as being composed of T.
[0061] In the first inspection mode, the main control unit 11 (data transmission unit 116) uses the page memory. The original image stored in is simultaneously sent to both the image forming unit 16 and the reference image generation unit 311. Send.
[0062] The reference image generation unit 311 generates 1 to n pages based on the received original image (pages 1 to n). Reference images 1 to n are generated in order and stored in the memory unit 32.
[0063] As shown in Figure 4, x is a value that starts at 1 and increments up to page n. The forming unit 16 forms images on the paper sequentially from page 1 to n. x is the current page value. be.
[0064] The image reading unit 33 reads the transported paper (x pages) and generates a read image. The read image is then sent via page memory as the xth page of the examination images. It is sent to the image inspection unit 312. Also, the reference image x of the corresponding x-th page is stored in the memory unit 32 or The image is then sent to the image inspection unit 312 via page memory.
[0065] The image inspection unit 312 compares the acquired reference image with the inspection image to determine the inspection image The control unit 31 (image inspection unit 312) then checks the inspection results of the inspection image. Output to unit 11. Note that in the example shown in Figure 3, the reference image generated by the reference image generation unit 311 is used. The image shows an example of data stored in the memory unit 32, but the image is stored in the memory unit 12 of the image forming apparatus 10. It may also be shown that the main control unit 11 and the control unit 31 are separate components. As explained, they may be configured as a single unit. That is, the control unit 31 may be integrated into the main control unit 11. It's okay.
[0066] Here, the timing specification reception unit 115 accepts the execution of the first inspection mode. If this occurs, the reference image generation unit 311 generates a reference image and the image forming unit 16 generates an image shape The formation of the (inspection) image is performed in parallel. Figure 5 shows the case where a second timing is specified. Acquisition of original image, generation of reference image, formation of inspection image, and inspection of inspection image in the process This is a schematic diagram showing each process in chronological order. Figure 5 shows the following processes from top to bottom. (Process 1) The main unit control unit 11 acquires the original image. (Process 2) Generation of a reference image by the reference image generation unit 311. (Process 3) Formation of an image of the object to be inspected by the image forming apparatus 10 (image forming unit 16). (Process 4) The image inspection unit 312 performs inspection using the inspection image and the reference image. Furthermore, Figure 5 shows the printing and inspection processes for a total of 8 pages of original document images, assuming n=8. Regarding processes 3 and 4, the description of the processes from page 3 and 4 onwards is omitted. In Figure 5, the image formation process includes preparation for printing. This refers to the feeding of paper by the paper feed device 20 or paper feed unit 14 for the first page of paper, and the image This includes data processing such as rasterization by the forming apparatus 10.
[0067] As shown in Figure 5, the reference image is generated by the reference image generation unit 311 and the image forming unit 16 The formation of the examination images (image formation) is performed in parallel. Specifically, the basic images on pages 1 to 8 are formed in parallel. The process of generating a preliminary image and the image formation by the image forming unit 16 are performed in parallel.
[0068] (Image examination method) The image inspection method according to this embodiment will be described below with reference to Figures 6A to 11.
[0069] First, the setting of the inspection conditions for image inspection in this embodiment will be explained. Figures 6A-6A 6G is an operation screen (operation screen s1~) for setting the inspection conditions for image inspection and issuing execution commands. s7) This is the print settings other than the inspection conditions for print job job1, and the original image. The selection is made via other operation screens (not shown in the diagram). Operation screens s1 to s7 are P The terminal device 80 or control panel 17 on which the linter driver is installed will be displayed. In operation screens s1, s3, etc., the user selects either radio button b1 or b2. It can be selected. Also, if the user selects b2, they can further select b21, b22, or You can choose one of the following.
[0070] (Second timing) Refer to Figures 6A and 6B to explain the second timing specification. Figure 6A shows the operation diagram. Buttons b1 (and b3) on surface s1 correspond to the first reception unit. The user operates On screen s1, select button b1 and press the job start button b3. The timing specification reception unit 115 of the image inspection device 100 receives the reference image generated by the reference image generation unit 311. Before the generation of the quasi-image is complete, the system receives an execution instruction from the image inspection unit 312 (first inspection). (Mode). Upon receiving an execution instruction, the image inspection apparatus 100 performs image formation, and This immediately performs an inspection on the generated image. The operation screen s2 shown in Figure 6B is shown in Figure This screen appears after the operation screen s1 of 6A. The user clicks the job start button b3. By pressing the button, the timing specification reception unit 115 receives an instruction to execute the inspection in the first inspection mode. In response, the operation screen s2 indicating that the first inspection mode has been accepted is displayed. .
[0071] (First timing) Refer to Figures 6C to 6E to explain the first timing specification (part 1). Figure 6 Button b2 (and b21, and b5 (on operation screen s4)) on operation screen s3 of C. This corresponds to the first timing specification. The user selects button b2, and then the button Select b21 and press the registration start button b4. This will start the basic The quasi-image generation unit 311 generates a new reference image based on the original image, and the generated reference The image is registered in the storage unit 32, etc. Once registered, the operation screen s4 shown in Figure 6D is displayed. The user presses the job start button b5 on the operation screen s4. This initiates the image inspection. The timing specification reception unit 115 of the device 100 receives the reference image generated by the reference image generation unit 311. After completion, the image inspection unit 312 receives an instruction to perform the inspection. (See Figure 6E) Operation screen s5 is the screen that appears following operation screen s4 in Figure 6D. Timing specification When the reception unit 115 receives an instruction to execute the second inspection mode, the operation screen s5 is displayed. It will be shown.
[0072] Next, we will refer to Figures 6F to 6G and explain the first timing specification (part 2). In the operation screen s7 of Figure 6G, buttons b2, b22, and b7 are in the first timing. The user selects buttons b2 and b22 on the operation screen s6, and then selects... Press the select button bb6. This will bring up a screen where the user can specify the file path. A pop-up window (not shown) appears, allowing you to specify the file of a reference image that you previously generated and registered. This reference image file is stored, for example, in storage unit 32 (or storage unit 12). In the operation screen s7 of Figure 6G, the specified reference image (path of the reference image) is displayed in the display field b60. As shown, the user presses the job start button b7 on the operation screen s7. Therefore, the timing specification reception unit 115 of the image inspection device 100 is determined by the reference image generation unit 311. After the generation of the reference image is completed, the image inspection unit 312 receives an instruction to perform the inspection. The second inspection mode can also be started by pressing the job start button b7 on the operation screen s7. An operation screen s5 is displayed, indicating that the execution command has been received. Next, refer to Figures 7 to 9. The settings and implementation of the image inspection conditions received via the operation screens shown in Figures 6A to 6G. This section explains image examinations according to the instructions given.
[0073] (Image examination method) Figures 7 to 9 are flowcharts showing the image inspection method.
[0074] (Step S11) The image inspection device 100 receives a print job. The print job contains the original image (print data). This includes job settings such as inspection conditions. In the following, the original image is processed in the same way as in the example in Figure 4. This explanation assumes that the file contains image data for multiple pages, from page 1 to page n.
[0075] (Step S12) The control unit 11 of the image inspection device 100 refers to the inspection conditions described in the job settings. This determines whether or not the inspection setting is enabled. The control unit 11, if it is to perform the inspection (YES), Proceed to step S13. If the test is not performed (NO), terminate the process (END). In this case, the print job is subjected to normal image formation without image inspection. Yes, but I will omit the explanation.
[0076] (Step S13) The control unit 11 of the image inspection device 100 receives the reference image from the timing specification reception unit 115. The timing of image generation is determined. The timing specification reception unit 115 receives a notification from the user. The specified setting is the first inspection mode, and the timing of the generation of the reference image is the second timing If the specified option is "G", proceed to Figure 8 (indicated by the circled "A" in the figure). On the other hand, the user - The timing specification receiving unit 115 receives a specification which is the second inspection mode and the first If it is a timing issue, then proceed to the process shown in Figure 9 (indicated by the circled "B" in the figure). Second The instruction to execute the test, which includes specifying the timing, is received via the operation screen s1 in Figure 6A, as described above. This is an execution instruction that has been attached, and it is the first test mode. A test with a specified first timing. The execution instructions are as described above, on the operation screens s3 and s4 in Figures 6C to 6D, or in Figures 6F to 6. These are execution instructions received on the G operation screens s6 and s7, and represent the second inspection mode.
[0077] Refer to Figure 8A. In Figure 8A (and similarly in Figure 9), the process enclosed by the dashed line on the left is The process performed on the image forming apparatus 10 side, and the process enclosed by the dashed line on the right side, is performed by the inspection unit. This is a process performed on the T30 side. The processing on the inspection unit side in steps S24 to S26 may be carried out in parallel. The image forming unit 16 performs image formation, and the reference image generation unit 311 performs reference image generation. This is done occasionally. For example, as shown in Figure 5, the first page of the inspection image by the image forming unit 16 In parallel with the formation process, the reference image generation unit 311 generates reference images for pages 3 and 4. Furthermore, the processing in step S25 and the processing in steps S27 and S28 are carried out in parallel. It may be carried out in the following way. For example, as shown in Figure 5, in step S25, the reference image generation unit 31 Step 1 generates the reference image on page 5, and simultaneously, step S27 generates the paper to be inspected. The data is read, and in step S28, the image inspection unit 312 inspects the inspection image.
[0078] (Step S21) The image forming unit 16 of the image forming apparatus 10 receives original images (1 to n).
[0079] (Step S215) The control unit 31 performs a reference image generation completion determination process 1 (hereinafter) before the image inspection (step S28). The system performs a judgment process (or judgment process 1, etc.). Figure 8B shows a subroutine illustrating the judgment process. This is a flowchart. The decision-making process described here will be explained later.
[0080] (Step S22) The image forming unit 16 forms an image on the paper based on the original image. x has an initial value of 1. This is a value that increments up to page n. The image forming unit 16 processes pages 1 to n sequentially. Next, an image is formed on the paper. x is the current page value. Note that the control unit 11 (or control Section 31) generates reference images for all pages (pages 1 to n), and then the image forming unit 16 processes the image. Image formation may be facilitated.
[0081] (Step S23) The image forming apparatus 10 forms an image on paper and transports the image-formed paper to the inspection unit 30. do.
[0082] (Step S24) The inspection unit 30 receives the document image. The control unit 31 processes the received document image into pages. It is stored in memory or storage unit 32.
[0083] (Step S25) The reference image generation unit 311 generates a reference image based on the original image. Figure 10 shows the reference image. This is a subroutine flowchart illustrating the image generation process.
[0084] (Step S601) The reference image generation unit 311 reads out the original image stored in the page memory or storage unit 32. vinegar.
[0085] (Step S602) The reference image generation unit 311 performs resolution conversion and color gamut conversion processing on the original image, and converts it. Obtain subsequent image data (a temporary reference image). This image data is obtained in step S603 below. The image becomes the reference image after processing with S605.
[0086] (Step S603) If the reference image generation unit 311 has inspection area specification information (YES), it proceeds to step S6. Proceed to step 03. If not found (NO), skip step S603. In this way, the inspection area The specified information is not necessarily used in all image examinations and may be omitted. The inspection area specification information is included in the inspection condition information. As mentioned above, there is a specification for the inspection area and a specification for the area to be excluded from inspection.
[0087] (Step S604) The reference image generation unit 311 sets the inspection area specification information in the reference image.
[0088] (Step S605) The reference image generation unit 311 extracts alignment features from the reference image. The features used include image contour information and edge information. This completes the processing shown in Figure 10. , return to the original process (return).
[0089] (Step S26) Refer to Figure 8 again. Here, the control unit 31 inks x if not all pages have been completed. Rement and perform step S25 on the next page. Meanwhile, all pages are finished. If so (YES), that is, the generation of reference images up to page n (x=n) is complete. If so, proceed to the next step S265. As described above, the process in step S25 This can also be performed in parallel with the processing in steps S27 and S28.
[0090] (Step S265) Here, the control unit 31 performs the determination process 2 before the image inspection (step S28).
[0091] (Step S501) The control unit 31 determines whether the reference image on page x is stored in the storage unit 32. The reference image for page x has already been generated in the memory unit 32 of section 31, and is stored in the memory unit 32. If (YES), the process in Figure 8B is terminated and the process returns to Figure 8A. The control unit 31 then... If the determination process in step S215 is 1, the processes from step S22 onwards are executed, and step S2 If the determination process is 65, then the process from step S27 onwards is executed. On the other hand, if the reference image is If the data is not stored in the memory unit 32, the control unit 31 proceeds to step S502. This situation occurs because the generation of the reference image may not be completed in time. This is for the following reasons: The processing time for generating the reference image depends on the content of the original image and the inspection area. It changes depending on the amount of fixed information. Therefore, the processing time for generating the reference image is different from the image formation processing time. It may be longer than that. Another example here is that the reference image on page x is already You could also check if it has already been generated and is ready.
[0092] (Step S502) The control unit 31 and the main unit control unit 11 perform processing according to the determination process.
[0093] If the determination process 1 is performed, the main control unit 11 determines the image forming apparatus 1 for page x. The image forming apparatus 10 waits for the paper feeding timing to be 0. The process is delayed, or the registration roller in the image forming unit 16 holds the paper for an extra predetermined time. It causes this to happen. Also, if a waiting process occurs, the operation panel 17, etc., will display that it is in a waiting state. ru.
[0094] If the process goes through judgment process 2, the control unit 31 determines that the image on page x cannot be inspected. Since it is already formed on the paper or is in the process of being formed, the xth page of the paper will be used as waste paper. The control unit 11 determines the purge tray to be discharged by the purge device 40 for page x. Page processing is performed. The control unit 11 also performs recovery printing on this x page. Furthermore, the control unit 11 displays an error message, such as the occurrence of waste paper, on the operation panel 17, etc. To show.
[0095] (Step S27) The image reading unit 33 of the inspection unit 30 reads the image of the object to be inspected that has been transported from the image forming apparatus 10. The paper (page x) is read and an image is generated. This image is used as an inspection image. I can stay.
[0096] (Step S28) The image inspection unit 312 then reads and generates the x-th page inspection image in step S27. The inspection is performed. Figure 11 is a subroutine flowchart showing the image inspection process. .
[0097] (Step S701) The image inspection unit 312 stores the x-th page reference in the storage unit 32 or page memory. Load the image.
[0098] (Step S702) The image inspection unit 312 compares the reference image on page x with the same page x generated in step S27. Align the inspection images of the eye. Alignment is performed using the reference image extracted in step S604. Image inspection is performed by matching the features of an image with the features of an image being examined. The part 312, by matching the features, performs a coordinate transformation or coordinate shift on the position of the two images. Place them side by side.
[0099] (Steps S703, S704) The image inspection unit 312 checks the corresponding pixel values of the reference image and the inspection image after alignment. The difference is calculated, and the quality of the inspection image is determined based on the magnitude of the difference. This completes the process shown in Figure 11. The process is terminated and the user returns to the original process (return).
[0100] (Step S29) Refer to Figure 8 again. Here, the image inspection device 100 will not complete all pages unless x Increment the value and repeat the process from step S22 onwards. Meanwhile, after all pages have been completed... If (YES), that is, if the check up to page n (x=n) has been completed, then End of processing. The above completes the image inspection process in the first inspection mode. Next, Figure Refer to section 9 for a description of the second inspection mode.
[0101] (Second inspection mode) Figure 9 is a flowchart showing the second inspection mode, which follows Figure 7. The second inspection mode is the first timing specification as explained in Figures 6C to 6E, and the This explanation assumes that an instruction to perform image inspection based on the specified conditions has been received. Specifically, it is explained below. In Figure 9, a new reference image is registered, and then image inspection is performed using this image. .
[0102] (Steps S41, S42) The inspection unit 30 receives the document image. The control unit 31 stores the received document image in the storage unit. Save to 32.
[0103] (Steps S43, S44) The reference image generation unit 311 generates a reference image based on the original image. The processing here is as follows: Steps S25 and S26 are the same, and the subroutine flowchart shown in Figure 10 is used. A reference image is generated. Once the generation of the reference image is complete, the timing specification reception unit 11 Step 5 displays the operation screen s4 as shown in Figure 6D.
[0104] (Step S45) The timing specification reception unit 115 processes the image inspection if there is an instruction to start the image inspection (YES). Proceed to step S46. Here, the instruction to start execution is given by the user on the operation screen s4. This occurs when the job start button d5 is pressed. This is because the reference image is processed before image formation. This corresponds to receiving the specification of a first timing for generating a reference image by the generation unit 311. ru.
[0105] (Steps S46-S51) The process described here involves transporting the image-formed paper from the image forming apparatus 10 to the inspection unit 30. This is the same process as steps S21 to S23 in Figure 8, so the explanation is omitted.
[0106] (Steps S49-S50) The image inspection processing by the inspection unit 30 here is performed in steps S27 to S29 of Figure 8. The process is similar, so the explanation will be omitted.
[0107] Thus, the image inspection apparatus according to this embodiment is used for inspecting images formed on a recording medium. A reference image generation unit generates a reference image, and based on the reference image, shapes the recording medium The image inspection unit inspects the generated images, and the receiving unit accepts the specification of the timing for generating the reference image. It has an attachment part and a reference image generation unit. It has a control unit that controls the generation of the reference image. By specifying the timing, the time required for processing leading up to image inspection can be reduced. In particular, the second If the timing for generating the reference image is specified during image formation, then the image This can shorten the time required for processing leading up to image inspection.
[0108] The configuration of the inspection unit 30 described above, and the image inspection apparatus 100 equipped therewith, is as follows: In describing the features of the above embodiment, the main configuration has been explained, It is not limited to the above, and various modifications can be made within the scope of the patent claims. Also, general images This does not preclude the configurations of an image forming apparatus. The scope of the present invention is as described in the attached claims. It should be interpreted within the scope of [the relevant term].
[0109] (modified version) The image inspection device 100 may include a terminal device 80 equipped with a display unit. 80 is provided with a timing specification reception unit 115, and the operation screen s1, s displayed on the display unit Based on the third-order system, the system accepts the specification of the reference image formation timing and the instruction to perform the inspection.
[0110] Furthermore, in the inspection unit 30 and the image inspection device 100 according to the above-described embodiment... The means and methods for performing various processes can be realized by either dedicated hardware circuits or programmed computers. The above program may be provided by a computer-readable recording medium such as a USB memory or a DVD (Digital Versatile Disc)-ROM, or may be provided online via a network such as the Internet. In this case, the program recorded on the computer-readable recording medium is usually transferred and stored in a storage unit such as a hard disk. Also, the above program may be provided as a single application software or incorporated into the software of the device as one of its functions. This is possible by either dedicated hardware circuits or programmed computers. The above program may be provided by a computer-readable recording medium such as a USB memory or a DVD (Digital Versatile Disc)-ROM, or may be provided online via a network such as the Internet. In this case, the program recorded on the computer-readable recording medium is usually transferred and stored in a storage unit such as a hard disk. Also, the above program may be provided as a single application software or incorporated into the software of the device as one of its functions. For example, it may be provided by a computer-readable recording medium such as a USB memory or a DVD (Digital Versatile Disc)-ROM, or may be provided online via a network such as the Internet. In this case, the program recorded on the computer-readable recording medium is usually transferred and stored in a storage unit such as a hard disk. Also, the above program may be provided as a single application software or incorporated into the software of the device as one of its functions. the Internet. In this case, the program recorded on the computer-readable recording medium is usually transferred and stored in a storage unit such as a hard disk. Also, the above program may be provided as a single application software or incorporated into the software of the device as one of its functions. transferred and stored in a storage unit such as a hard disk. Also, the above program may be provided as a single application software or incorporated into the software of the device as one of its functions. The above program may be provided as a single application software or incorporated into the software of the device as one of its functions.
Explanation of Signs
[0111] 1000 Printing system 100 Image inspection device 10 Image forming device 11 Main body control unit 111 Printer control unit 112 Inspection unit control unit 113 Other device control unit 115 Inspection execution instruction reception unit 116 Data transmission unit 117 Inspection area reception unit 12 Storage unit 13 Print controller 14 Paper feeding unit 15 Conveying unit 16 Image forming unit 17 Operation panel 19 Communication unit 20 Paper feeding device 30 Inspection unit 31 Control unit 311 Reference image generation unit 312 Image inspection unit 32 Storage unit 33 Image reading unit 34 Conveying section 39 Communications Department 40. Purge device 50 Post-processing equipment
Claims
1. A reference image generation unit that generates a reference image used for inspecting an image formed on a recording medium, An image inspection unit that inspects the image formed on the recording medium based on the aforementioned reference image, A reception unit that accepts the specification of the timing for generating the reference image, An image inspection device having the following features.
2. According to the generation timing received by the reception unit, the reference image generation unit generates a reference image The image inspection apparatus according to claim 1, having a control unit that controls the generation of [something].
3. The system further includes an image forming unit that forms the image on the recording medium based on the original image, The generation timing is a first timing which is before image formation by the image forming unit, The image inspection apparatus according to claim 1, including a second timing different from the first timing. Place.
4. The second timing includes the timing during image formation by the image forming unit, The image inspection apparatus described in item 3.
5. Based on the acceptance of the second timing specification, the original image is transferred to the reference image. A control unit that controls the transmission to the image generation unit and the image forming unit. The image inspection apparatus according to claim 3 or 4, further comprising the above.
6. The control unit generates the reference image by the reference image generation unit and the image forming unit The image inspection apparatus according to claim 5, which causes the formation of the image on the recording medium to be performed in parallel. 。
7. According to the generation timing received by the reception unit, the reference image generation unit generates a reference image It has a control unit that controls the generation of, When the control unit receives the second timing specification, The aforementioned image inspection unit forms an image based on the document image of page x out of pages 1 to n. When performing an inspection on a form, Whether or not the generation of the reference image for page x by the reference image generation unit has been completed is determined. The image inspection apparatus according to claim 3 or claim 4, which makes a determination before inspecting the x-th page.
8. According to the generation timing received by the reception unit, the reference image generation unit generates a reference image It has a control unit that controls the generation of, When the control unit receives the second timing specification, The aforementioned image inspection unit forms an image based on the document image of page x out of pages 1 to n. When performing an inspection on a form, The control unit has determined that the reference image for page x has already been generated by the reference image generation unit. And whether or not the storage of the reference image in the storage unit is complete is checked before the x-th page inspection. An image inspection apparatus according to claim 3 or claim 4, which makes a determination.
9. According to the generation timing received by the reception unit, the reference image generation unit generates a reference image It has a control unit that controls the generation of, When the control unit receives the first timing specification, Before the image is formed by the image forming unit, a registration is used for inspection by the image inspection unit. The image according to claim 3 or claim 4, which determines whether a completed reference image has been specified or not. Inspection device.
10. A reference image generation step for generating a reference image used for inspecting an image formed on a recording medium, and 、 Image inspection step: Inspecting the image formed on the recording medium based on the reference image. and, A receiving station that accepts the specification of the timing for generating the reference image in the aforementioned reference image generation step. Top, Image inspection methods, including those mentioned above.
11. A reference image generation step for generating a reference image used for inspecting an image formed on a recording medium, and 、 Image inspection step: Inspecting the image formed on the recording medium based on the reference image. and, A receiving station that accepts the specification of the timing for generating the reference image in the aforementioned reference image generation step. Top, An image inspection program that causes a computer to perform a process that includes [specific details].