Inspection system and inspection method

Abstract

The objective is to provide an inspection system, a processing device, a control method for the inspection system, and a program that enable rapid inspection of printed materials. [Solution] The inspection system 1000 performs inspection on printed materials. The inspection system 1000 includes a data acquisition means (video I / F 254) that acquires print data that becomes printed material through printing, and a branching means (image branching unit 250) that branches the destination to which the print data acquired by the data acquisition means is sent to a first destination where a first process is performed to make the print data a reference image data that will serve as the basis for inspection, and a second destination where a second process is performed to print the print data and obtain a printed material that will be compared with the reference image data as the target of inspection.

Description

Technical Field

[0001] The present invention relates to an inspection system, a processing device, a control method for an inspection system, and a program.

Background Art

[0002] An image forming apparatus generates a printed matter by printing an image on a sheet based on image data. In particular, an image forming apparatus used in commercial printing may print a large number of copies or pages as a printed matter. Further, the quality of the printed matter may be inspected. In this case, in an inspection apparatus, a read image obtained by reading the printed matter with a scanner or the like is compared with a reference image, and the quality of the printed matter is inspected based on the comparison result. Further, the reference image needs to be registered in the inspection apparatus at the time of quality inspection. For example, Patent Document 1 describes an apparatus that generates a reference image registration job for registering a reference image.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when using the apparatus described in Patent Document 1, in addition to generating a reference image registration job, a job for forming an image to be inspected is separately required. Thus, since the two jobs are generated independently, there is a problem that the inspection of the printed matter is prolonged. In particular, when printing a large number of copies or pages as a printed matter, the inspection of the printed matter tends to be significantly prolonged.

[0005] The present invention has been made in view of the above problems. An object of the present invention is to provide an inspection system, a processing device, a control method for an inspection system, and a program capable of quickly inspecting a printed matter. [Means for solving the problem]

[0006] To achieve the above objective, the present invention provides an inspection system for performing inspections on printed materials, comprising: data acquisition means for acquiring print data that will become the printed material through printing; and branching means for branching the destination to which the print data acquired by the data acquisition means is transmitted to a first destination where a first process is performed to make the print data a reference image data that will serve as the basis for the inspection; and a second destination where a second process is performed to print the print data and obtain the printed material that will be compared with the reference image data as the subject of the inspection. [Effects of the Invention]

[0007] According to the present invention, printed materials can be inspected quickly. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing the overall configuration of the inspection system according to the first embodiment. [Figure 2] This is a block diagram showing the hardware configuration of an image forming apparatus, inspection unit, high-capacity stacker, inspection apparatus, information processing apparatus, and reference image generation apparatus. [Figure 3] This is a schematic diagram showing the internal configuration of the image forming apparatus, inspection unit, and high-capacity stacker. [Figure 4] This is a diagram showing the screen displayed on an information processing device. [Figure 5] This is a diagram showing the screen displayed on the inspection device. [Figure 6] This is a sequence diagram showing the processes performed between an information processing device, a reference image generation device, an image forming device, and an inspection device. [Figure 7] This is a block diagram showing the hardware configuration of an image forming apparatus, inspection unit, large-capacity stacker, inspection apparatus, information processing apparatus, and reference image generation apparatus according to the second embodiment. [Figure 8]This is a sequence diagram showing the processes performed between an information processing device, a reference image generation device, an image forming device, and an inspection device. [Figure 9] This is a sequence diagram showing the processing performed between the information processing device, the reference image generation device, and the image forming device according to the third embodiment. [Modes for carrying out the invention]

[0009] The embodiments of the present invention will be described in detail below with reference to the drawings. However, the configurations described in the following embodiments are merely illustrative, and the scope of the present invention is not limited to the configurations described in each embodiment. For example, each part constituting the present invention can be replaced with any configuration that can perform a similar function. In addition, any configuration may be added. Furthermore, any two or more configurations (features) from each embodiment can be combined.

[0010] <First Embodiment> The first embodiment will be described below with reference to Figures 1 to 6. Figure 1 is a schematic diagram showing the overall configuration of the inspection system according to the first embodiment. The inspection system 1000 shown in Figure 1 is a system for inspecting printed materials. The printed material is not particularly limited and may be, for example, a booklet with multiple pages, a single sheet of printed material, etc. The inspection system 1000 includes an image forming apparatus (first apparatus) 101, an inspection unit 105, a large-capacity stacker 106, an inspection device (print inspection apparatus) 107, an information processing device (third apparatus) 108, and a reference image generation device (second apparatus) 109. The image forming apparatus 101, the inspection device 107, the information processing device 108, and the reference image generation device 109 are configured separately from each other. The inspection unit 105 and the large-capacity stacker 106 are built into the image forming apparatus 101. The image forming apparatus 101 and the reference image generation device 109 are connected via a cable 111. The information processing device 108 and the reference image generation device 109 are connected via cable 110. The inspection device 107 and the reference image generation device 109 are connected via cable 112. The inspection device 107 and the inspection unit 105 are connected via cable 113. The image forming apparatus 101 has a UI panel 102, a paper feed deck 103, and an optional deck 104. The UI panel 102 has a function to accept user operations and a function to display a screen. The paper feed deck 103 stores printing paper (hereinafter sometimes simply referred to as "paper"). The optional deck 104 has a three-tiered paper feed deck, and printing paper is stored in each tier. The image forming apparatus 101 performs print output based on various input data, such as print data transmitted from the information processing device 108. In this embodiment, the printing method in the image forming apparatus 101 is an electrophotographic method, but it is not limited to this, and may be, for example, an inkjet method, an offset method, etc. The image forming apparatus 101 is not particularly limited, and for example, a multi-function peripheral (MFP) can be used. Furthermore, the image forming apparatus 101 may incorporate a stapler, folding machine, binding machine, etc.

[0011] The image forming apparatus 101 incorporates an inspection unit 105 and a large-capacity stacker 106, which are connected to each other via a communication cable, which is an internal bus. The inspection unit 105 receives the printed material output from the image forming apparatus 101. The inspection unit 105 then acquires image data (print data) for inspecting the printed material for the presence or absence of abnormal images. An "abnormal image" is an image that degrades the quality of the printed material. Abnormal images are not particularly limited and include, for example, round abnormal images (dots) that occur when colorant adheres to unintended areas during printing, and linear abnormal images (streaks) that result from insufficient colorant adhering to intended areas. The image data acquired by the inspection unit 105 is transferred to the inspection device 107. The inspection device 107 inspects the printed material for the presence or absence of abnormal images based on the image data from the inspection unit 105. The inspection result is transmitted to the inspection unit 105. In this embodiment, the inspection is performed by the inspection device 107, but is not limited to this. For example, it may be performed by an inline inspection machine that performs image formation, inspection, post-processing, and paper output in an integrated manner. A display 115 is connected to the inspection device 107. The display 115 is, for example, a liquid crystal display and has the function of receiving user operations and the function of displaying the screen. The large-capacity stacker 106 has a main tray and a top tray. The main tray can hold several thousand sheets of printed paper. The large-capacity stacker 106 can also receive the output paper inspected by the inspection unit 105 and switch the paper output destination based on the inspection results of the inspection unit 105.

[0012] The reference image generation device 109 generates a reference image (reference image data) based on the RIP image received from the information processing device 108. The reference image generation device 109 also has a branching function. The "branching function" is a function that branches the destination of the image data to two destinations. One of the two destinations (hereinafter referred to as the "first destination") is the image processing unit 259 of the reference image generation device 109. The other destination (hereinafter referred to as the "second destination") is the image forming apparatus 101. Both the first and second destinations can acquire the same image data. The information processing device 108 generates a print job. This print job is transmitted from the information processing device 108 to the image forming apparatus 101 via the reference image generation device 109. The image forming apparatus 101 performs the process of printing on paper based on the print job. A display 114 is also connected to the information processing device 108. The display 114 is, for example, a liquid crystal display and has the function of receiving user input and the function of displaying a screen.

[0013] Figure 2 is a block diagram showing the hardware configuration of the image forming apparatus, inspection unit, large-capacity stacker, inspection device, information processing device, and reference image generation device. As shown in Figure 2, the image forming apparatus 101 has a CPU 201, RAM 202, UI panel 203, paper feed deck I / F 204, and storage unit 205. The image forming apparatus 101 also has a video I / F 206, NW_I / F (network interface) 207, accessory I / F 208, engine I / F 209, paper feed deck 211, and printer engine (printing means) 210. These hardware components of the image forming apparatus 101 are connected to each other via a system bus 212 so that they can communicate with one another. The CPU 201 is a computer that performs control and calculations in each part of the image forming apparatus 101. The CPU 201 executes programs stored in the storage unit 205 and loaded into the RAM 202. These programs include, for example, control programs (programs) that cause the CPU 201 to execute each process (control method of the inspection system). This control program is not limited to being stored in the image forming apparatus 101; it may also be stored in other devices, or distributed across multiple devices. RAM 202 is a type of volatile memory that can be directly accessed from the CPU 201. RAM 202 is also used as the work area or other temporary data storage area of ​​the CPU 201. The storage unit 205 functions as a temporary storage area and work memory during the operation of the image forming apparatus 101.

[0014] The engine I / F 209 communicates with the printer engine 210. The paper feed deck I / F 204 communicates with the paper feed deck 211. The paper feed deck 211 consists of the paper feed deck 103 and the optional deck 104. The UI panel 203 is included in the UI panel 102 and is a user interface for performing general operations of the image forming apparatus 101. In this embodiment, the UI panel 203 has a capacitive touch panel. The NW_I / F 207 is connected to the NW_I / F 257 of the reference image generation device 109 via cable 213 and communicates between the reference image generation device 109 and the image forming apparatus 101.

[0015] The video I / F 206 is connected to the video I / F 256 of the reference image generation device 109 via the video cable 241, and communicates image data between the image forming device 101 and the reference image generation device 109. The accessory I / F 208 is connected to the accessory I / F 214 of the inspection unit 105 and the accessory I / F 220 of the large capacity stacker 106 via the cable 225. Thereby, communication between the image forming device 101 and the inspection unit 105 and communication between the image forming device 101 and the large capacity stacker 106 become possible.

[0016] The inspection unit 105 includes an accessory I / F 214, an inspection device I / F 215, a CPU 216, a RAM 217, a photographing unit (reading means) 218, and a storage unit 261, and these hardware components are communicably connected to each other via the system bus 219. The CPU 216 loads the program stored in the storage unit 261 into the RAM 217. Then, the CPU 216 operates the program to perform control and calculation in each part within the inspection unit 105. The RAM 217 is a type of volatile memory device that can be directly accessed by the CPU 216. Also, the RAM 217 is used as a work area for the CPU 216 or other temporary data storage areas. The storage unit 261 functions as a temporary storage area and a work memory during the operation of the inspection unit 105. The inspection device I / F 215 is connected to the inspection unit I / F 231 of the inspection device 107 via the cable 249. Thereby, communication between the inspection unit 105 and the inspection device 107 becomes possible. The photographing unit 218 has a photographing function equipped with, for example, a contact image sensor (hereinafter referred to as "CIS"). The photographing unit 218 photographs the printing paper passing through the inspection unit 105. This photographed image is transmitted to the inspection device 107 via the inspection device I / F 215. The purpose of transmitting the photographed image is for inspection of the printed matter by the inspection device 107. Note that in the photographing unit 218, instead of the CIS, other types of sensors such as a CCD image sensor can be used.

[0017] The high-capacity stacker 106 includes an accessory interface 220, a CPU 221, RAM 222, a paper output unit 223, and a storage unit 248. These hardware components are connected to each other via a system bus 224 for communication. The CPU 221 loads programs stored in the storage unit 248 into the RAM 222. The CPU 221 then runs the programs to perform control and calculations in each part of the high-capacity stacker 106. The RAM 222 is a type of volatile memory that can be directly accessed by the CPU 221. The RAM 222 is also used as the CPU 221's work area or other temporary data storage area. The storage unit 248 functions as a temporary storage area and work memory during the operation of the high-capacity stacker 106. Reference images are also stored in the storage unit 248. The paper output unit 223 controls the paper output operation to the main tray and top tray, and monitors the stacking status of the main tray and top tray.

[0018] The inspection device 107 includes a CPU 226, a RAM (storage medium) 227, a storage unit 228, and a display unit 245. The inspection device 107 also includes an inspection device I / F 231, a NW_I / F 232, and an image processing unit (inspection processing unit) 246. These hardware components of the inspection device 107 are connected to each other via a system bus 230 so as to be communicable. The CPU 226 loads a program stored in the storage unit 228 into the RAM 227. Then, the CPU 226 operates the program to perform control and arithmetic operations in each part of the inspection device 107. The RAM 227 is a type of volatile storage device that can be directly accessed by the CPU 226. Also, the RAM 227 is used as a work area for the CPU 226 or other temporary data storage areas. The storage unit 228 functions as a temporary storage area and a work memory during the operation of the inspection device 107. The display unit 245 is included in the display 115 and receives user operations on the inspection device 107 or displays the state of the inspection device 107. The image processing unit 246 reads the reference image from the reference image generation device 109 and the scan image (scan image data) from the inspection unit 105, and compares these images with each other. Then, the image processing unit 246 inspects the presence or absence of defects in the printed matter based on this comparison result. Hereinafter, the case where the inspection result is defect-free may be referred to as "inspection result GOOD", and the case where the inspection result is defective may be referred to as "inspection result NG".

[0019] The information processing device 108 is the source of print data for the reference image generation device 109. The information processing device 108 has a video I / F 233, a CPU 234, RAM 235, a storage unit 236, and an NW_I / F 237, and these hardware components are connected to each other via a system bus 239 so that they can communicate with one another. The CPU 234 loads the program stored in the storage unit 236 into the RAM 235. The CPU 234 then runs the program to perform control and calculations in each part of the information processing device 108. The RAM 235 is a type of volatile memory that can be directly accessed by the CPU 234. The RAM 235 is also used as the CPU 234's work area or other temporary data storage area. The storage unit 236 functions as a temporary storage area and work memory during the operation of the information processing device 108. NW_I / F237 is connected to NW_I / F255 of the reference image generation device 109 via cable 247, and enables communication between the reference image generation device 109 and the information processing device 108. Video I / F233 is connected to video I / F254 of the reference image generation device 109 via video cable 290, and enables communication of image data between the reference image generation device 109 and the information processing device 108.

[0020] The reference image generation device 109 is a processing device (bridge device) that processes image data that will become the printed material to be inspected. The reference image generation device 109 includes an image branching unit (branching means) 250, a CPU 251, RAM (storage medium) 252, a storage unit 253, a video I / F (data acquisition means) 254, a video I / F 256, an NW_I / F 257, an NW_I / F 258, and an image processing unit 259. These hardware components of the reference image generation device 109 are connected to each other via a system bus 260 so that they can communicate with one another. The CPU 251 loads the program stored in the storage unit 253 into the RAM 252. The CPU 251 then runs the program to perform control and calculations in each part of the reference image generation device 109. The RAM 252 is a type of volatile storage device that can be directly accessed by the CPU 251. The RAM 252 is also used as the CPU 251's work area or other temporary data storage area. The memory unit 253 functions as a temporary storage area and work memory for the reference image generation device 109. The NW_I / F 255 is connected to the NW_I / F 237 of the information processing device 108 via cable 247 to facilitate communication between the reference image generation device 109 and the information processing device 108. The NW_I / F 257 is connected to the NW_I / F 207 of the image forming apparatus 101 via cable 213 to facilitate communication between the reference image generation device 109 and the image forming apparatus 101. The NW_I / F 258 is connected to the NW_I / F 232 of the inspection device 107 via cable 249 to facilitate communication between the reference image generation device 109 and the inspection device 107.

[0021] The video interface 254 is connected to the video interface 233 of the information processing device 108 via the video cable 290, and communicates image data between the reference image generation device 109 and the information processing device 108. This allows image data to be acquired from the information processing device 108 prior to branching in the image branching unit 250, which will be described later (data acquisition step). This image data is input to the image branching unit 250. The image branching unit 250 has a signal branching circuit equipped with a buffer circuit that includes one input unit and two output units. This allows the image data input to the input unit to be branched into two signals (branching step). One of the two signals is output from one of the two output units to the image processing unit 259, which is the first transmission destination. The other signal is output from the other output unit via the video interface 256 to the video interface 206 of the image forming apparatus 101, which is the second transmission destination. The image data output to the first and second destinations is the same data, but the image data output to the first destination is used for generating a reference image, and the image data output to the second destination is used as print data to be printed. The image processing unit 259 receives image data from the image branching unit 250. The image processing unit 259 performs image processing on this image data, such as color space conversion, resolution conversion, and image compression. This generates a reference image that serves as the basis for inspection. The reference image is stored in the RAM 252. The reference image is also read from the RAM 252 and transmitted to the inspection device 107 via the NW_I / F 258. In this embodiment, the connection interface connecting the image forming apparatus 101, the reference image generation device 109, and the information processing device 108 was one NW_I / F and one video I / F, but is not limited to this. For example, the connection interface may be an I / F that has the function of at least one NW_I / F and the function of at least one video I / F.

[0022] Figure 3 is a schematic diagram showing the internal configuration of the image forming apparatus, inspection unit, and high-capacity stacker. As shown in Figure 3, the image forming apparatus 101 has a built-in paper feed deck 103. In the paper feed deck 103, only the top sheet of printing paper is separated and transported to the paper transport path 305. The image forming apparatus 101 also has developing stations 301 to 304, an intermediate transfer belt 306, and a fixing unit 308. Developing station 301 forms a toner image using yellow (Y) toner. Developing station 302 forms a toner image using magenta (M) toner. Developing station 303 forms a toner image using cyan (C) toner. Developing station 304 forms a toner image using black (K) toner. Each toner image is first transferred to the intermediate transfer belt 306. The intermediate transfer belt 306 rotates clockwise in Figure 3. Each toner image on the intermediate transfer belt 306 is transferred to the printing paper transported from the paper transport path 305 at the secondary transfer position 307.

[0023] The fuser unit 308 has a pressure roller and a heating roller, and as the printing paper passes between these rollers, the toner on the printing paper can be melted and pressed. This fixes the toner image to the printing paper. After passing through the fuser unit 308, the printing paper passes through the paper transport path 309 and is transported to the paper transport path 312. Depending on the printing paper, further toner image fixing may be required. In this case, the printing paper that has passed through the fuser unit 308 is transported to the second fuser unit 310. The second fuser unit 310 can perform additional melting and pressing. After that, the printing paper passes through the paper transport path 311 and is transported to the paper transport path 312. Furthermore, when printing on both sides of the printing paper, the printing paper that has passed through the fuser unit 308 is transported to the paper reversal path 313 and reversed. After that, the printing paper is transported to the double-sided transport path 314, where the toner image is transferred to the back side at the secondary transfer position 307.

[0024] The inspection unit 105 has two imaging units 218, CIS315 and CIS316, which are positioned opposite each other. CIS315 is a sensor that reads the image of the top surface of the printed paper. CIS316 is a sensor that reads the image of the bottom surface of the printed paper. When the printed paper transported on the paper transport path 317 reaches a predetermined position, the inspection unit 105 scans (reads) the printed paper using CIS315 and CIS316. This scanned image is transmitted to the inspection device 107 via the inspection device I / F 215 and accessory I / F 220. The inspection device 107 determines whether or not there are defects in the scanned image. This determination result is transmitted to the inspection unit 105. The CPU 216 transmits this determination result to the large-capacity stacker 106.

[0025] The high-capacity stacker 106 has a main tray 324 for stacking printing paper. Printing paper that has passed through the inspection unit 105 is transported through the paper transport path 319 into the high-capacity stacker 106. The printing paper is then transported through the paper transport path 322 and stacked on the main tray 324. The high-capacity stacker 106 also has a top tray 320 as an output tray. Printing paper (printed material) in which defects are detected by the inspection device 107 is discharged to the top tray 320. When printing paper is to be output to the top tray 320, it is transported from the paper transport path 319 to the top tray 321. The high-capacity stacker 106 has a reversing unit 323 for reversing the printing paper. The reversing unit 323 is used when stacking printing paper on the main tray 324. The reversal in the reversal unit 323 allows the orientation of the printing paper when it is loaded onto the main tray 324 to be the same as the orientation of the printing paper when it is loaded into the large-capacity stacker 106; in other words, the orientation can be made the same.

[0026] Figure 4 shows a screen displayed on the information processing device. The operation screen 400 shown in Figure 4 is displayed on the display 114 of the information processing device 108 when printing is instructed to the image forming apparatus 101. The operation screen 400 includes buttons 401 to 406 and a print condition display unit 407. Button 401 is for selecting the color during printing, that is, whether to print in color or in black and white. The result of this selection is displayed on the print condition display unit 407. Button 402 is for selecting the printing surface, that is, whether to print on one side or on both sides. Button 403 is for selecting the type of printing paper to be used. The result of this selection is displayed on the print condition display unit 407. Button 404 is for selecting the destination for the printed output. In addition, the number of copies can be set by operating the numeric keypad (not shown). This number of copies is displayed on the print condition display unit 407. By pressing (operating) button 405 while selection conditions have been set using buttons 401 to 404, printing will start according to each selection condition. By pressing button 406 while selection conditions have been set using buttons 401 to 404, each selection condition will be canceled, the display of operation screen 400 will be suppressed, and another predetermined initial screen will be displayed.

[0027] Figure 5 shows a screen displayed on the inspection device. The inspection result screen 500 shown in Figure 5 is displayed on the display (notification means) 115 of the inspection device 107 during inspection. The inspection result screen 500 includes an image display unit 501, an inspection result display unit 502, and a status display unit 503. The image display unit 501 displays the scanned image read by the inspection unit 105. The scanned image is updated for each page of the printed material. In the case of an inspection result of NG, markings may be added to the scanned image displayed on the image display unit 501 to allow identification of the areas where the inspection result was NG. The inspection result display unit 502 displays (notifies) information regarding the inspection results (processing results in the second process), such as the number of inspections completed, the number of inspection results of NG, the inspection result NG rate, and the type of inspection result of NG. This allows for a detailed understanding of the inspection results. The status display unit 503 displays the status of the inspection, such as "Waiting (Waiting for inspection execution)", "Executing (Inspection execution in progress)", and "Inspection completed".

[0028] Figure 6 is a sequence diagram showing the processes performed between the information processing device, the reference image generation device, the image forming device, and the inspection device. The execution of each process in the sequence diagram shown in Figure 6 begins when button 405 (see Figure 4) is pressed. As shown in Figure 6, in step S601, the CPU 234 of the information processing device 108 sends job information to the image forming device 101 when button 405 on the operation screen 400 displayed on the display 114 is pressed. The job information includes, for example, the number of pages in the printed material, information about the paper used for printing the printed material, settings for the inspection conditions of the printed material, and information about the destination of the printed material's output.

[0029] In step S602, the CPU 201 of the image forming apparatus 101 receives the job information transmitted in step S601. As a result, the image forming apparatus 101 prepares to accept a print job. The job information is stored in the RAM 202 until the print job is completed. The CPU 201 also transmits the job information to the reference image generation device 109.

[0030] In step S603, the CPU 251 of the reference image generation device 109 receives the job information transmitted in step S602. As a result, the reference image generation device 109 prepares to accept a print job. The CPU 251 sends (responds to) the image forming device 101 with information indicating that the job information has been received.

[0031] In step S604, the CPU 201 of the image forming apparatus 101 receives information indicating that it has received the job information transmitted in step S603. The CPU 201 transmits the response result of the job information from the reference image generation device 109, that is, information indicating that the job information has been received by the reference image generation device 109, to the information processing device 108.

[0032] In step S605, the CPU 234 of the information processing device 108 receives the response result sent in step S604. The CPU 234 starts sending the image data included in the print job to the reference image generation device 109. This image data is the data that will become a printed document when printed. The printed document will have multiple pages. Image data transmission is performed for each image data that forms one page.

[0033] In step S606, the CPU 251 of the reference image generation device 109 receives the image data transmitted in step S605. This image data is input to the image branching unit 250. As described above, the image data input to the image branching unit 250 is branched by the image branching unit 250 to two destinations, a first destination and a second destination, and transmitted. The first destination is the image processing unit 259. The image processing unit 259 can receive the image data. The second destination is the image forming apparatus 101. The image forming apparatus 101 can receive the same image data as the image data received by the image processing unit 259.

[0034] In step S607, the CPU 251 of the reference image generation device 109 controls the image processing unit 259 to generate a reference image by performing image processing on the image data received by the image processing unit 259. The reference image is stored in the RAM 252.

[0035] In step S608, the CPU 251 of the reference image generation device 109 transmits the reference image generated in step S607 to the inspection device 107.

[0036] In step S609, the CPU 226 of the inspection device 107 receives the reference image transmitted in step S608.

[0037] In step S610, the CPU 226 of the inspection device 107 stores the reference image received in step S609 in the storage unit 228. This registers the reference image for inspection. Hereafter, steps S607 to S610 (the part enclosed by the dashed line [a] in Figure 6) will be referred to as the "first process" in which processing using the image data as the reference image is performed. The parts and means that perform the first process can be referred to as the "first execution means". This first execution means is also the first transmission destination in which the first process is performed.

[0038] In step S611, the CPU 251 of the reference image generation device 109 transmits image data to the second destination, the image forming device 101.

[0039] In step S612, the CPU 201 of the image forming apparatus 101 receives the image data transmitted in step S611. This image data has a CRC value attached to it. The CRC value is generated from the image data when it is transferred from the information processing device 108 in step S605, and is used to detect whether or not an error occurred during the image data transfer. The CPU 201 determines whether the value calculated from the image data received in step S612 matches the CRC value. If it is determined that they match, the CPU 201 determines that no data error occurred during the transfer, and associates the job information stored in the RAM 202 in step S602 with the image data received in step S612 to create a print job. On the other hand, if it is determined that they do not match, it determines that a data error occurred during the transfer, and requests the information processing device 108 to retransmit the image data. As a result, the reference image generation device 109 retransmits the image data retransmitted from the information processing device 108 to the image forming apparatus 101. The CPU 251 then receives image data from the information processing device 108 and deletes any stored image data (image data containing errors) that has become unnecessary as a result of receiving the image data.

[0040] In step S613, the CPU 201 of the image forming apparatus 101 controls the printer engine 210 to start printing based on the print job.

[0041] In step S614, the CPU 216 of the inspection unit 105 built into the image forming apparatus 101 uses a paper detection sensor (not shown) on the paper transport path 317 to determine whether or not the printing paper has reached the paper transport path 317. If the determination in step S614 indicates that the printing paper has reached the path, the process proceeds to step S615. On the other hand, if the determination in step S614 indicates that the printing paper has not reached the path, the process remains in a waiting state at step S614.

[0042] In step S615, the CPU 216 of the inspection unit 105 reads the image of the printed paper passing through the paper transport path 317 using CIS 315 and CIS 316.

[0043] In step S616, the CPU 216 of the inspection unit 105 transmits the scanned image read in step S615 to the inspection device 107.

[0044] In step S617, the CPU 226 of the inspection device 107 receives the scan image transmitted in step S616.

[0045] In step S618, the CPU 226 of the inspection device 107 controls the image processing unit (inspection means) 246 to compare the reference image stored in the storage unit 228 in step S610 with the scanned image received in step S617. This allows the presence or absence of defects in the printed material to be checked. For example, if the inspection result is found to be free of defects, i.e., the inspection result is judged to be GOOD, the printed material is ejected into the main tray 324. If the inspection result is found to be defective, i.e., the inspection result is judged to be NG, the printed material is ejected into the top tray 320.

[0046] In step S619, the CPU 226 of the inspection device 107 displays the result of the inspection process in step S618 (inspection result) on the inspection result display unit 502 of the inspection result screen 500 (see Figure 5). This notifies the user of the inspection result (processing result in the second process), allowing them to understand the result. Steps S605 to S619 are repeated until the last page of the print job. After processing of the last page is completed, the CPU 226 displays "Inspection Complete" on the status display unit 503 of the inspection result screen 500. Hereinafter, steps S613 to S619 (the part enclosed by the dashed line [b] in Figure 6) are referred to as the "second process," which performs inspection by comparing the scanned image obtained by reading the printed material obtained as the object of inspection with a reference image. The parts and means that execute the second process can be referred to as the "second execution means." This second execution means is also the second transmission destination to which the second process is executed. Furthermore, the branching function of the aforementioned reference image generation device 109 allows the transmission destination of a single image data to be split into a first destination and a second destination. This enables the first processing at the first destination and the second processing at the second destination to be executed in parallel (see Figure 6). This parallel execution eliminates the waiting time that would otherwise be required to wait for the print inspection to begin until the reference image is generated and saved. This elimination of waiting time allows the print inspection to begin quickly.

[0047] Furthermore, the inspection system 1000 may also perform a determination at the image branching unit 250 as to whether the transmission of image data to the first destination has been completed, and whether the transmission of image data to the second destination has been completed. This determination is performed, for example, by the CPU (determination means) 251 of the reference image generation device 109. If, as a result of this determination, it is determined that the transmission of image data to the second destination has not been completed, the video I / F 254 of the reference image generation device 109 acquires the image data again from the information processing device 108, which is the source of the image data. The image data acquired by the video I / F 254 is then transmitted to both the first and second destinations. This makes it possible to prepare both a reference image and a scanned image for inspection.

[0048] <Second Embodiment> The second embodiment will be described below with reference to Figures 7 and 8, focusing on the differences from the previously described embodiment, and omitting similar explanations. Figure 7 is a block diagram showing the hardware configuration of the image forming apparatus, inspection unit, large-capacity stacker, inspection apparatus, information processing apparatus, and reference image generation apparatus according to the second embodiment. As shown in Figure 7, the reference image generation apparatus 109 has an image branching unit 250 to an image processing unit 259, and further has a power supply control unit 2200. The main power supply of the reference image generation apparatus 109 uses a power supply such as 24V or 12V, and generates logic power supplies such as 5V, 3.3V, and 2.5V to power the image branching unit 250 to the image processing unit 259 via the power supply control unit 2200. The power supply control unit 2200 is connected to the CPU 201 of the image forming apparatus 101 via a signal line 2201 so as to be able to communicate. As a result, the power supply control unit 2200 can receive the first Ready signal output by the CPU 201 of the image forming apparatus 101. In this case, the power supply control unit 2200 turns the logic power ON / OFF. The "first Ready signal" is a signal output to notify that the image forming apparatus 101 is ready to output an image. The first Ready signal turns on the main power to the reference image generation apparatus 109. This starts up the image branching unit 250 to the image processing unit 259.

[0049] Figure 8 is a sequence diagram showing the processes performed between the information processing device, the reference image generation device, the image forming device, and the inspection device. The execution of each process in the sequence diagram shown in Figure 8 begins when the main power switch (main switch) of the image forming device 101 is pressed. As shown in Figure 8, in step S801, power is supplied to each part of the image forming device 101 when the main power switch of the image forming device 101 is pressed and turned ON.

[0050] In step S802, the CPU 201 of the image forming apparatus 101 starts the startup process for the entire image forming apparatus 101. The startup process is not particularly limited and may include, for example, the execution of software on the CPU 201 and the confirmation of the status of each part of the image forming apparatus 101.

[0051] In step S803, the CPU 201 of the image forming apparatus 101 determines whether the startup process has been completed successfully. If the determination in step S803 indicates that the startup process has been completed successfully, the process proceeds to step S804. On the other hand, if the determination in step S803 indicates that the startup process has not been completed successfully, the process remains in step S803 and waits.

[0052] In step S804, the CPU 201 of the image forming apparatus 101 transmits a first Ready signal to the power control unit 2200 of the reference image generation apparatus 109.

[0053] In step S805, the CPU 251 of the reference image generation device 109 controls the power supply control unit 2200 to receive the first Ready signal transmitted in step S804.

[0054] In step S806, the CPU 251 of the reference image generation device 109 controls the power supply control unit 2200 to turn on the power supply of the reference image generation device 109. This "power supply" refers to the logic power supplies such as 5V, 3.3V, and 2.5V used for system control of the reference image generation device 109. The power supply control unit 2200 switches the DC-DC converter, which generates the logic power supply from a power supply such as 24V or 12V, from the OFF state to the ON state.

[0055] In step S807, the CPU 251 of the reference image generation device 109 starts a startup process. The startup process is not particularly limited and may include, for example, starting the image branching unit 250 or the image processing unit 259. The image branching unit 250 and the image processing unit 259 process the image data. For this reason, it is also conceivable that a separate image processing IC or an image data-dedicated IC using an FPGA, etc., may be used in addition to the CPU 251. In this case, a startup process for the image data-dedicated IC is required, and it is preferable that the CPU 251 is notified when the startup is complete.

[0056] In step S808, the CPU 251 of the reference image generation device 109 determines whether the startup process has been completed successfully. If the determination in step S808 indicates that the startup process has been completed successfully, the process proceeds to step S809. On the other hand, if the determination in step S808 indicates that the startup process has not been completed successfully, the process remains in step S808 and waits.

[0057] In step S809, the CPU 251 of the reference image generation device 109 transmits a second Ready signal to the information processing device 108.

[0058] In step S810a, the CPU 234 of the information processing device 108 receives the second Ready signal transmitted in step S809. This allows the CPU 234 to determine that the image forming apparatus 101 and the reference image generation apparatus 109 are both in a state (Ready state) where they can perform the processing from step S810b onward.

[0059] In step S810b, the CPU 234 of the information processing device 108 determines whether button 405 on the operation screen 400 displayed on the display 114 has been pressed, that is, whether or not printing has been instructed to start. If the determination in step S810b is that button 405 has been pressed, the process proceeds to step S811. On the other hand, if the determination in step S810b is that button 405 has not been pressed, the process remains in step S810b and waits.

[0060] Steps S811 to S829 are the same as steps S601 to S619 in the sequence diagram shown in Figure 6.

[0061] As described above, in this embodiment, when the power supply of the image forming apparatus 101 is switched from the OFF state to the ON state, a first Ready signal is transmitted to the reference image generation device 109 as information relating to this fact. As a result, the power supply of the reference image generation device 109 is switched from the OFF state to the ON state. Then, when the power supply of the reference image generation device 109 is switched from the OFF state to the ON state, a second Ready signal is transmitted to the information processing device 108 as information relating to this fact. As a result, the inspection system 1000 can determine that the image forming apparatus 101 and the reference image generation device 109 are each in a state where they can execute the processing from step S810b onward.

[0062] <Third Embodiment> The third embodiment will be described below with reference to Figure 9, focusing on the differences from the previously described embodiment, and omitting explanations of similar matters. In this embodiment, the operation of the image forming apparatus 101, information processing apparatus 108, and reference image generation apparatus 109 during the execution of a print job when no inspection of the printed material is performed will be described. Figure 9 is a sequence diagram showing the processing performed between the information processing apparatus, reference image generation apparatus, and image forming apparatus according to the third embodiment. As shown in Figure 9, steps S901 to S910b are executed in order. Steps S901 to S910b are the same as steps S8012 to S810b in the sequence diagram shown in Figure 8. If, as a result of the judgment in step S910b, it is determined that button 405 has been pressed, the process proceeds to step S911. In step S911, the CPU 234 of the information processing apparatus 108 transmits job information to the image forming apparatus 101. In this embodiment, the print inspection setting is set to not perform inspection (image inspection). This setting information is included in the job information.

[0063] In step S912, the CPU 201 of the image forming apparatus 101 receives the job information transmitted in step S911. This causes the image forming apparatus 101 to prepare to accept a print job. The job information is stored in the RAM 202 until the print job is completed. The CPU 201 also transmits the job information to the reference image generation device 109.

[0064] In step S913, the CPU 251 of the reference image generation device 109 receives the job information transmitted in step S912. As a result, the reference image generation device 109 prepares to accept a print job.

[0065] In step S914, the CPU 251 of the reference image generation device 109 performs an image processing stop operation because the job information received in step S913 includes setting information that does not perform print inspection settings. "Image processing stop operation" refers to the process of stopping the reference image generation function. The method of stopping this function is not particularly limited and includes, for example, deactivating the reference image generation function, stopping the power supply to the image processing unit 259, and stopping image transmission from the image branching unit 250 to the image processing unit 259. In addition, power consumption can be reduced by stopping the image processing function. After stopping the image processing function, the CPU 251 sends information to the image forming apparatus 101 indicating that job information has been received.

[0066] In step S915, the CPU 201 of the image forming apparatus 101 receives information indicating that it has received the job information transmitted in step S914. The CPU 201 transmits the response result of the job information from the reference image generation apparatus 109 to the information processing apparatus 108.

[0067] In step S916, the CPU 234 of the information processing device 108 receives the response result sent in step S915. The CPU 234 starts sending the image data included in the print job to the reference image generation device 109. This image data is the data that will become the printed material when printed. The image data is transmitted for each image data that forms one page of the printed material.

[0068] In step S917, the CPU 251 of the reference image generation device 109 receives the image data transmitted in step S916. This image data is input to the image branching unit 250. As mentioned above, the image data input to the image branching unit 250 can be branched and transmitted to two destinations, a first destination and a second destination, by the image branching unit 250. However, in this embodiment, since the print inspection setting is not performed, transmission to the first destination is omitted.

[0069] In step S918, the CPU 251 of the reference image generation device 109 transmits image data to the second destination, the image forming device 101.

[0070] In step S919, the CPU 201 of the image forming apparatus 101 receives the image data (print job) transmitted in step S918.

[0071] In step S920, the CPU 201 of the image forming apparatus 101 controls the printer engine 210 to start printing based on the image data received in step S919.

[0072] As described above, in this embodiment, if the inspection of the printed material is stopped, the generation of the reference image (execution of the first process) can also be stopped. This prevents the generation of unnecessary reference images.

[0073] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications and changes are possible within the scope of its gist. The present invention can also be realized by supplying a program that implements one or more of the functions of the above embodiments to a system or device via a network or storage medium, and by having one or more processors in the computer of that system or device read and execute the program. Furthermore, the present invention can also be realized by a circuit (e.g., an ASIC) that implements one or more functions.

[0074] Each embodiment of the disclosure includes the following configurations, methods, and programs. (Configuration 1) An inspection system for inspecting printed materials, A data acquisition means for acquiring print data that will become the printed material through printing, An inspection system characterized by comprising branching means for branching the destination to which the print data acquired by the data acquisition means is sent to a first destination where a first process is performed to make the print data a reference image data that serves as the basis for the inspection, and a second destination where a second process is performed to print the print data and obtain a printed object that is compared with the reference image data as the object of the inspection. (Configuration 2) The inspection system according to Configuration 1, characterized in that the second process obtains scanned image data of the printed material obtained as the object of inspection by reading the printed material. (Configuration 3) The inspection system according to Configuration 2, characterized in that, in the second process, the scan image data and the reference image data are compared during the inspection. (Configuration 4) A printing means for printing the print data, A reading means for reading the printed material on which the print data has been printed using the printing means, The system comprises an inspection means for performing the aforementioned inspection, The inspection system according to configuration 3, characterized in that, in the second process, the printed material is acquired by the printing means, the scanned image data is acquired by the reading means, and the scanned image data and the reference image data are compared and inspected by the inspection means. (Configuration 5) A first apparatus having the printing means, The system comprises a second device, which is configured separately from the first device and has the data acquisition means and the branching means, The inspection system according to configuration 4, characterized in that the power supply of the second device is configured to switch from the OFF state to the ON state when the power supply of the first device is switched from the OFF state to the ON state. (Configuration 6) A third device which is the source of the print data, The inspection system according to configuration 5, characterized in that the second device is configured to transmit information to the third device when the power supply of the second device is switched from an OFF state to an ON state. (Configuration 7) The inspection system according to any one of Configurations 1 to 6, wherein the branching means has a signal branching circuit equipped with a buffer circuit that includes one input unit and two output units, and the print data input to the input unit is branched into two signals, one of the two signals is output from one of the two output units to the first transmission destination, and the other signal is output from the other output unit to the second transmission destination. (Configuration 8) An inspection system according to any one of Configurations 1 to 7, characterized by comprising determination means for determining whether the transmission of the print data to the first recipient has been completed and whether the transmission of the print data to the second recipient has been completed. (Configuration 9) The inspection system according to Configuration 8, characterized in that, as a result of the determination by the determination means, it is determined that the transmission of the print data to the second destination has not been completed, the data acquisition means acquires the print data again from the source of the print data, and the print data is transmitted to the first destination and the second destination. (Configuration 10) An inspection system according to any one of Configurations 1 to 9, comprising a first execution means for executing the first process as a first transmission destination, and a second execution means for executing the second process as a second transmission destination. (Configuration 11) The inspection system according to Configuration 10, characterized in that the first process and the second process are executed in parallel. (Configuration 12) The inspection system according to Configuration 10 or 11, characterized by comprising a notification means for notifying the processing result in the second process. (Configuration 13) The inspection system according to any one of Configurations 10 to 12, characterized in that the first execution means stops executing the first process when the second execution means stops the inspection. (Configuration 14) A processing device for processing print data that will become a printed document to be inspected, The processing apparatus is characterized by comprising branching means for branching the destination to which the print data is sent into a first destination where a first process is performed to make the print data a reference image data that serves as the basis for the inspection, and a second destination where a second process is performed to print the print data and obtain a printed object that is compared with the reference image data as the subject of the inspection. (Configuration 15) The processing apparatus according to Configuration 14, wherein the branching means has a signal branching circuit equipped with a buffer circuit that includes one input unit and two output units, and the print data input to the input unit is branched into two signals, one of the two signals is output from one of the two output units to the first transmission destination, and the other signal is output from the other output unit to the second transmission destination. (Configuration 16) The processing apparatus according to Configuration 14 or 15, characterized in that it includes a data acquisition means for acquiring the print data prior to branching in the branching means. (Configuration 17) The processing apparatus according to any one of Configurations 14 to 16, characterized by comprising an execution means for performing the first processing. (Method 1) A method for controlling an inspection system that performs inspection on printed materials, A data acquisition step to acquire print data that will become the printed material through printing, A control method for an inspection system, characterized by having a branching step that branches the destination to which the print data acquired in the data acquisition step is sent into a first destination to which a first process is performed to make the print data a reference image data that serves as the basis for the inspection, and a second destination to which a second process is performed to print the print data and obtain a printed object that is compared with the reference image data as the object of the inspection. (Program 1) A program characterized by causing a computer to execute the control method described in Method 1. [Explanation of symbols]

[0075] 101 Image forming apparatus 109 Reference Image Generator 210 Printer Engine 218 Photography Department 246 Image Processing Unit 250 Image branching point 254 Video I / F 1000 inspection systems

Claims

1. An inspection system for inspecting printed materials, A data acquisition means for acquiring print data that will become the printed material through printing, An inspection system characterized by comprising branching means for branching the destination to which the print data acquired by the data acquisition means is sent to a first destination where a first process is performed to make the print data a reference image data that serves as the basis for the inspection, and a second destination where a second process is performed to print the print data and obtain a printed object that is compared with the reference image data as the object of the inspection.

2. The inspection system according to claim 1, characterized in that the second process involves reading the printed material obtained as the object of inspection to obtain scanned image data of the printed material.

3. The inspection system according to claim 2, characterized in that the second process involves comparing the scanned image data with the reference image data during the inspection.

4. A printing means for printing the aforementioned print data, A reading means for reading the printed material on which the print data has been printed using the printing means, The system comprises an inspection means for performing the aforementioned inspection, The inspection system according to claim 3, characterized in that in the second process, the printed material is acquired by the printing means, the scanned image data is acquired by the reading means, and the scanned image data and the reference image data are compared and inspected by the inspection means.

5. The first apparatus having the printing means, The system comprises a second device, which is configured separately from the first device and has the data acquisition means and the branching means, The inspection system according to claim 4, characterized in that the power supply of the second device is configured to switch from the OFF state to the ON state when the power supply of the first device is switched from the OFF state to the ON state.

6. The device includes a third device which is the source of the aforementioned print data, The inspection system according to claim 5, characterized in that the second device is configured to transmit information to the third device when the power supply of the second device is switched from an OFF state to an ON state.

7. The inspection system according to claim 1, wherein the branching means has a signal branching circuit equipped with a buffer circuit that includes one input unit and two output units, and the print data input to the input unit is branched into two signals, one of the two signals is output to the first transmission destination from one of the two output units, and the other signal is output to the second transmission destination from the other output unit.

8. The inspection system according to claim 1, further comprising determination means for determining whether the transmission of the print data to the first recipient has been completed, and determining whether the transmission of the print data to the second recipient has been completed.

9. The inspection system according to claim 8, characterized in that, as a result of the determination by the determination means, if it is determined that the transmission of the print data to the second destination has not been completed, the data acquisition means acquires the print data again from the source of the print data, and the print data is transmitted to the first destination and the second destination.

10. The inspection system according to claim 1, further comprising: a first execution means for executing the first process, which serves as the first transmission destination; and a second execution means for executing the second process, which serves as the second transmission destination.

11. The inspection system according to claim 10, characterized in that the first process and the second process are performed in parallel.

12. The inspection system according to claim 10, further comprising a notification means for notifying the processing result in the second process.

13. The inspection system according to claim 10, characterized in that the first execution means stops executing the first process when the second execution means stops the inspection.

14. A processing device that processes print data that will become a printed document to be inspected, The processing apparatus is characterized by comprising branching means for branching the destination to which the print data is sent into a first destination where a first process is performed to make the print data a reference image data that serves as the basis for the inspection, and a second destination where a second process is performed to print the print data and obtain a printed object that is compared with the reference image data as the subject of the inspection.

15. The processing apparatus according to claim 14, wherein the branching means has a signal branching circuit equipped with a buffer circuit that includes one input unit and two output units, and the print data input to the input unit is branched into two signals, one of the two signals is output from one of the two output units to the first transmission destination, and the other signal is output from the other output unit to the second transmission destination.

16. The processing apparatus according to claim 14, further comprising a data acquisition means for acquiring the print data prior to branching in the branching means.

17. The processing apparatus according to claim 14, further comprising execution means for performing the first processing.

18. A method for controlling an inspection system that performs inspections on printed materials, A data acquisition step to acquire print data that will become the printed material through printing, A control method for an inspection system, characterized by having a branching step that branches the destination to which the print data acquired in the data acquisition step is sent into a first destination to which a first process is performed to make the print data a reference image data that serves as the basis for the inspection, and a second destination to which a second process is performed to print the print data and obtain a printed object that is compared with the reference image data as the object of the inspection.

19. A program characterized by causing a computer to execute the control method described in claim 18.

Images