JP2018088620A - Image forming apparatus, image reading device, information processing apparatus, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent wrong detection of abnormality in an image on a transfer medium.SOLUTION: An image forming apparatus comprises: an image forming part that forms an image on a transfer medium; an image reading part that reads the image on the transfer medium; and a control part that controls the image forming part. The control part has a function to acquire a first reading result that is a result of reading of the image on the transfer medium with the image reading part and analyze the image, and when determining through the analysis that the read image has abnormality and the abnormality is a predetermined abnormality, performs processing to remove the abnormality in the image reading part. The control part acquires a second reading result that is a result of reading of the image on the transfer medium with the image reading part after the removal processing and analyzes the image on the basis of the second reading result, and further determines the abnormality in the image on the transfer medium that is read to bring out the first reading result according to the state of the abnormality in the analysis.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an image forming apparatus, an image reading apparatus, an information processing apparatus, and a program capable of analyzing an image based on a result of reading an image on a transfer medium.

In the field of image forming apparatuses, image quality adjustment and image abnormality determination are performed using read image data obtained by reading a sheet image. For example, an adjustment image is printed on a paper insertion sheet or cutting margin, and the image is adjusted by reading it, or the read image and the image data for printing are compared, and the printed images do not match. There is known an apparatus capable of determining abnormality in some cases. Also, when an adjustment image is read, the abnormality of the image can be determined based on the inability to adjust.
If it is determined that the image is abnormal, the error is detected, and output is stopped or the error paper is discharged to a different discharge destination.

On the other hand, in this apparatus, since the image is read while conveying the paper, dust and paper dust easily adhere to the image reading unit. If dust or paper dust adheres to the image reading unit, even if there is no abnormality in the printed image, an image due to dust or paper dust is included in the scanned image, and analysis is performed based on this scanned image. It is determined that there is an abnormality in the image.
Therefore, a method has been proposed in which, when an abnormality is detected in the read image, it is determined whether the abnormality in the read image is caused by dirt or the like on the reading unit.
For example, in Patent Document 1, when a read image includes a vertical stripe, the reading glass is moved and read again, and the cause of the vertical stripe is analyzed based on a change in the vertical stripe position in the read image before and after the movement. ing.

JP 2014-200062 A

  However, although the technique described in Patent Document 1 identifies the cause of the vertical stripe of the read image, the operation after determining that the vertical stripe of the read image is caused by an abnormality of the reading glass. Is not listed. For this reason, when the cause of the error is an abnormality on the scanner side, there is a problem that the paper erroneously detected as an error is treated as it is.

  The present invention has been made in view of the above circumstances, and relates to an image forming apparatus, an image reading apparatus, an information processing apparatus, and a program capable of preventing erroneous detection of an abnormality in an image on a transfer medium.

That is, among the image forming apparatuses of the present invention, the first form is
An image forming unit for forming an image on a transfer medium;
A control unit for controlling the image forming unit,
The control unit has a function of acquiring a first reading result obtained by reading an image on the transfer medium by an image reading unit and analyzing the image;
When the image read in the analysis has an abnormality, and it is determined that the abnormality is a predetermined abnormality, a process for removing the abnormality in the image reading unit is performed, and the image reading unit after the removal process performs processing on the transfer medium. The second reading result obtained by reading the image is acquired, the image is analyzed based on the second reading result, and the transfer medium that is the target of the first reading result is analyzed according to the abnormal state in the analysis. It is further characterized in that an abnormality in the image is further determined.

  According to another aspect of the invention of the image forming apparatus, in the image forming apparatus of the above aspect, the predetermined abnormality may be caused by an abnormality of the image reading unit.

  The invention of an image forming apparatus of another form is characterized in that, in the image forming apparatus of the above form, the predetermined abnormality is an image that is not based on image forming image data and is continuous in the transfer medium transport direction.

  According to another aspect of the image forming apparatus of the present invention, in the image forming apparatus of the above aspect, the control unit detects a predetermined abnormal portion in the first reading result at the same position in the second reading result. Otherwise, it is determined that there is no abnormality in the image on the transfer medium that is the target of the first reading result.

  According to another aspect of the image forming apparatus of the present invention, in the image forming apparatus of the above aspect, the control unit has no abnormality in the image in the analysis of the second reading result, and the abnormality in the first reading result is the image. When it is determined that the image is caused by an abnormality in the reading unit, it is determined that there is no abnormality in the image on the transfer medium that is the target of the first reading result.

  The image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the aspect described above, the processing for removing the abnormality relates to the removal of deposits in the reading path of the image reading unit.

  The invention of another form of the image forming apparatus is characterized in that, in the image forming apparatus of the above form, the deposit is transfer medium waste.

  An image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the aspect described above, the control unit performs the processing for removing an abnormality between pages.

  According to another aspect of the invention of the image forming apparatus, in the image forming apparatus of the above aspect, if there is a predetermined abnormality in the image in the first reading result on the transfer medium, the reading result is analyzed in the subsequent image. The process of removing the abnormality is performed without performing the process, and the image after the process is read to obtain a second reading result.

  An image forming apparatus according to another aspect is characterized in that, in the image forming apparatus according to the above aspect, the transfer medium is a continuous transfer medium.

  The image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the above aspect, the control unit issues notification about an image that has not been analyzed.

  The image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the aspect, the control unit outputs an image that has not been analyzed in the notification after the end of the job.

  According to another aspect of the image forming apparatus of the present invention, in the image forming apparatus of the above aspect, when the control unit determines that there is an abnormality in both the first reading result and the second reading result, An abnormality process is performed.

  According to another aspect of the invention of the image forming apparatus, in the image forming apparatus of the above aspect, the control unit performs a predetermined abnormality process when the abnormality in the first reading result is an abnormality other than the predetermined abnormality. Features.

  The image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the aspect described above, the control unit stops outputting a job as the predetermined abnormality process.

  The image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the aspect described above, the control unit determines that the transfer medium is spoiled as the predetermined abnormality process.

  The image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus of the above aspect, the control unit notifies the user as the predetermined abnormality process.

  An image forming apparatus according to another aspect of the invention is characterized in that, in the image forming apparatus according to the aspect described above, the notification prompts cleaning or / and inspection of the image reading unit.

The image forming apparatus according to another aspect of the invention has a discharge switching unit that can switch the discharge destination of the transfer medium between a normal discharge destination and a defective discharge destination in the image forming apparatus of the above aspect,
The control unit performs output by switching the transfer medium discharge destination to a defective discharge destination as predetermined abnormality processing.

An image forming apparatus according to another aspect of the invention includes a storage unit that stores data in a readable manner in the image forming apparatus of the above aspect,
The control unit stores, in the storage unit, a page that is finally determined to be abnormal by reading.

  The invention of another form of the image forming apparatus is characterized in that in the image forming apparatus of the above form, the analysis of the image is for detection of drooling or image quality adjustment.

  The image forming apparatus according to another aspect of the present invention is the image forming apparatus according to the above aspect, wherein the control unit prints the reading result read by the image reading unit and the print image data of the job in the analysis of the droop detection. The image is compared with an image to determine the presence or absence of an abnormality.

Of the image reading apparatus of the present invention, the first form is:
An image reading unit that reads an image on a transfer medium and obtains a reading result;
A reading control unit for controlling the image reading unit,
The reading control unit has a function of acquiring a first reading result obtained by reading an image on the transfer medium by an image reading unit and analyzing the image, and the image read in the analysis has a predetermined abnormality When the determination is made, a process for removing the abnormality in the image reading unit is performed, a second reading result obtained by reading the image on the transfer medium by the image reading unit after the removing process is obtained, and the second reading result is obtained. An image is analyzed based on the image, and an abnormality of the image on the transfer medium that is a target of the first reading result is further determined according to an abnormality state in the analysis.

Of the information processing apparatus of the present invention, the first embodiment is an information processing apparatus having an information processing control unit that controls an image reading unit that reads an image on a transfer medium,
The information processing control unit has a function of acquiring a first reading result obtained by reading an image on the transfer medium by an image reading unit and analyzing the image, and the image read in the analysis has a predetermined abnormality. If the image reading unit determines that the image reading unit has removed the abnormality in the image reading unit, the image reading unit after the removing process acquires the second reading result obtained by reading the image on the transfer medium, and the second reading result. The image is analyzed based on the above, and the abnormality of the image on the transfer medium that is the target of the first reading result is further determined according to the abnormal state in the analysis.

Of the programs of the present invention, the first form is a program executed by a computer that controls an image reading unit that reads an image on a transfer medium,
Obtaining a first reading result obtained by reading an image on a transfer medium;
Analyzing an image based on the first reading result;
Determining whether the image read in the analysis has a predetermined abnormality;
Performing a process of removing the abnormality in the image reading unit when there is a predetermined abnormality;
Obtaining a second reading result obtained by reading an image on a transfer medium by the image reading unit after the removal process;
Analyzing an image based on the second reading result;
And further determining the abnormality of the image on the transfer medium that is the target of the first reading result in accordance with the state of abnormality in the analysis.

  According to the present invention, it is possible to prevent erroneous detection of an abnormality in an image on a transfer medium.

1 is a diagram illustrating a mechanical outline of an image forming apparatus according to an embodiment of the present invention. Similarly, it is a figure which shows an electrical block diagram. Similarly, it is a diagram for explaining a read image when dust adheres to the sensor of the image reading unit. Similarly, it is a flowchart which shows the procedure of the deviation analysis in a reading result, and a subsequent process. It is a flowchart which shows the procedure of the deviation analysis in the reading result in the other form of this invention, and a subsequent process. Similarly, it is a flowchart which shows the procedure of the deviation analysis in the reading result in further another form, and a subsequent process. Similarly, it is a diagram for explaining a read image when dust adheres to the sensor of the image reading unit when reading an image on roll paper. Similarly, it is a flowchart which shows the procedure of the deviation analysis in the reading result in further another form, and a subsequent process. Similarly, it is a flowchart which shows the procedure of the deviation analysis in the reading result in further another form, and a subsequent process.

(Embodiment 1)
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the image forming apparatus 1 includes a large-capacity paper feeding device 40, a device main body 10, a reading device 20, and a post-processing device 30 in order from the upstream side in the paper transport direction. Each apparatus is electrically and mechanically connected, and can convey and communicate paper between the apparatuses.
Note that the number and types of apparatuses in the image forming apparatus 1 are not limited to the above configuration, and other apparatuses may be connected, and the image forming apparatus 1 is configured by the apparatus main body 10 and the reading apparatus 20. Further, the image forming apparatus 1 may be configured by only the apparatus main body 10. When an image forming apparatus is configured by a part of the above apparatus, the image forming system may be configured together with other apparatuses.

  The large-capacity paper feeding device 40 has a configuration capable of storing paper, and the paper in the large-capacity paper feeding device 40 can be conveyed to the apparatus main body 10. In this embodiment, the paper corresponds to the transfer medium of the present invention. In the present invention, the transfer medium is not limited to paper, and may be made of, for example, plastic or cloth. Alternatively, a continuous transfer medium such as roll paper or continuous form paper can be used.

  The apparatus main body 10 includes an automatic document feeder (ADF) 14 at the top of the housing. An automatic document feeder (ADF) 14 feeds a document, and the fed document is read by a scanner unit not shown in FIG.

  The apparatus main body 10 further includes an operation unit 140 at the upper part of the housing. The operation unit 140 includes an LCD 141 having a touch panel. Information can be displayed on the LCD 141, and operation input can be received through the touch panel of the LCD 141. Furthermore, the operation unit can be configured with a mouse, a keyboard, or the like, and can be configured separately from the display unit.

  A paper feed tray 12 is provided on the lower side inside the housing of the apparatus main body 10. The paper feed tray 12 has a plurality of paper feed stages. Each paper feed stage stores paper, and the paper can be transported to the transport path 13. The paper corresponds to the transfer medium of the present invention.

The apparatus main body 10 has a conveyance path 13, and is connected to the upstream large-capacity paper feeding device 40 and the conveyance path 23 of the image reading apparatus 20.
An image forming unit 11 is provided in the middle of the conveyance path 13. The image forming unit 11 has a photoconductor 11a for each color (cyan (C), magenta (M), yellow (Y), and black (K)). It has a charger, LD, and developer. Further, the image forming unit 11 includes an intermediate transfer belt 11b to which an image on the photoreceptor 11a is transferred, and a secondary transfer unit 11c that transfers the image on the intermediate transfer belt 11b to a sheet.

A fixing device 11d for fixing the sheet on which the image is formed is disposed around the conveyance path 13 on the downstream side of the secondary transfer portion 11c.
The image forming unit 11 includes the above-described photoreceptor 11a, a charger (not shown), an LD, a developing unit, an intermediate transfer belt 11b, a secondary transfer unit 11c, a fixing unit 11d, and the like. The image forming unit may be one that forms an image in a single color, or may be an image forming unit that can print only a single color.

  Further, in the conveyance path 13, a reverse conveyance path 13a is branched on the downstream side of the fixing device 11d. A downstream conveyance path 13c is branched from the reverse conveyance path 13a, and a retreat conveyance path 13b is branched on the downstream side. The reverse conveyance path 13a joins the conveyance path 13 on the upstream side of the image forming unit 11 on the downstream side after the evacuation conveyance path 13b branches, and the reverse conveyance path 13c branches on the reverse conveyance path 13a. It merges with the conveyance path 13 on the downstream side of the position.

When only the face surface switching is performed, the sheet conveyed to the reverse conveyance path 13a is once sent to the retreat conveyance path 13b and then reversely moved to the downstream conveyance path 13c. The sheet sent to the downstream conveyance path 13c is conveyed downstream through the conveyance path 13 with the face surface being switched.
When the paper is reversed and circulated to the image forming unit 11, the paper is once sent from the reverse conveyance path 13 a to the retreat conveyance path 13 b, and then reversely moved and sent to the reverse conveyance path 13 a on the downstream side. An image is formed on the back side of the sheet by joining the conveyance path 13 on the upstream side.

  The control unit 100 of the apparatus main body 10 controls the entire image forming apparatus 1 and includes a CPU, a program executed by the CPU, a storage unit serving as a parameter and a work area, and the like. It also has a function of receiving an image reading result and analyzing the image. Further, the determination of whether the image read in the analysis is abnormal, the determination of whether the abnormality is a predetermined abnormality, the execution of the process for removing the abnormality in the image reading unit, the transfer medium by the image reading unit after the removal process The reading result obtained by reading the upper image is obtained, the image is analyzed based on the reading result, and the abnormality of the image on the transfer medium that is the target of the first reading result according to the abnormal state in the analysis Can be further determined. The program executed by the control unit 100 includes the program of the present invention, and the hardware of the control unit 100 corresponds to the computer shown in the present invention.

A reading device 20 (hereinafter appropriately referred to as ICCU) is connected to the paper discharge side of the apparatus main body 10. The conveyance path 13 of the apparatus main body 10 is connected to the conveyance path 23 of the reading device 20.
The reading device 20 includes an image reading unit 24 near the middle of the conveyance path 23. The image reading unit 24 is constituted by a line sensor such as a CMOS sensor or a CCD sensor, and can read an image on a sheet conveyed through the conveyance path 23 and transmit the read image data to the control unit 100 as a read result.
In this embodiment, the image reading unit is described as being included in the image forming apparatus. However, the image reading unit has an image reading unit outside the image forming apparatus, and the image forming apparatus can acquire the reading result of the image reading unit. For example, the image reading apparatus may be connected inline to the image forming apparatus, or the image reading unit and the image forming apparatus may be connected via a network or the like so that the reading result can be transmitted to the image forming apparatus. Good. The reading result may be acquired by storing the reading result in a removable recording medium and connecting the recording medium to the image forming apparatus.

  Further, a cleaning unit (not shown) is provided around the image reading unit 24, and the cleaning unit can clean the sensor of the image reading unit 24. The method for cleaning the sensor is not particularly limited as the present invention, and examples include cleaning with a brush, cleaning with gas injection or vibration, and the like. Paper dust and the like attached to the sensor can be removed by any of these methods, and a plurality of cleaning functions may be provided. The cleaning unit can perform simple cleaning that performs cleaning in a short time, and can clean the sensor between the conveyed sheets. In this embodiment, the reading device 20 corresponds to the image reading device of the present invention.

  In the conveyance path 23, the reverse conveyance path 23 a is branched, and both ends of the reverse conveyance path 23 a are connected to the conveyance path 23 so as to sandwich the image reading unit 24. Further, the retreat conveyance path 23b is branched on the downstream side in the conveyance direction of the reverse conveyance path 23a. The reverse conveyance path 23 a joins the conveyance path 22 downstream of the branch point of the retreat conveyance path 23 b and upstream of the image reading unit 24.

  When performing both-side reading, the paper that has passed through the image reading unit 24 is sent from the conveyance path 23 to the reverse conveyance path 23a and is evacuated to the retreat conveyance path 23b, and then returned to the reverse conveyance path 23a on the downstream side. Then, in the state where the face surface is switched, the reversal conveyance path 23 a is sent in the forward direction and is circulated to the conveyance path 23. The front and back sides of the circulated paper are reversed, and the image printed on the surface opposite to the surface previously read by the image reading unit is read by the image reading unit 24.

Note that when only one-side image reading is performed and the face surface is not switched, the transport path 23 is transported straight without being sent to the reverse transport path 23a.
Further, the image reading unit 24 may be arranged on the front and back sides of the sheet conveyance surface so that images on the front and back surfaces of the sheet can be read at once without reversing the sheet.
The post-processing device 30 is connected to the downstream side of the reading device 20, and the downstream side of the transport path 23 provided in the reading device 20 is connected to the transport path 33 of the post-processing device 30.

The conveyance path 33 of the post-processing device 30 is branched in the middle and connected to the first paper discharge unit 31 and the second paper discharge unit 32, and post-processing is performed in the middle of the conveyance path 33 leading to the second paper discharge unit 32. A portion 34 is provided. The post-processing unit 34 executes predetermined post-processing. Examples of post-processing include appropriate processing such as stapling, punching, and booklet processing. Paper that is not subjected to post-processing is discharged to the first paper discharge unit 31.
The paper sent in the transport path 23 is sent to the transport path 33 of the post-processing device 30 and is discharged to the first paper discharge unit 31 without performing post-processing, or predetermined post-processing in the post-processing unit 34. Are discharged to the second paper discharge unit 32. The post-processing unit 34 may perform a plurality of post-processing.
Further, the post-processing device 30 can change the paper discharge destination depending on whether the output paper is scraped. For example, a normal sheet having no abnormality can be discharged to the second sheet discharge unit 32, and a sheet detected as a scraped sheet can be discharged to the first sheet discharge unit 31.

  Although the above embodiment has been described on the assumption that color image formation is performed, the image forming apparatus may include a single color image forming unit.

Next, control blocks of the image forming apparatus 1 will be described with reference to FIG.
FIG. 2 is a circuit block diagram of the image forming apparatus 1 that functions as a digital multi-function peripheral (copier / printer / scanner) according to the present embodiment, and a diagram illustrating a network configuration of the image forming system. In FIG. 2, the control configuration other than the apparatus main body 10 is omitted.

  The image forming apparatus 1 includes a digital copier body and an image processing unit (print & scanner controller) 160. The digital copier body includes a control block 110, a scanner unit 130, an operation unit 140, and a printer unit 150. An image processing unit (print & scanner controller) 160 processes image data input from an external device such as the external device 4 through the LAN 3 or outputs image data obtained by the scanner unit 130 to an external device such as the external device 4 through the LAN 3. Enable transfer to device.

  The external device 4 can be used as a device that functions as a terminal or a device that manages the image forming apparatus 1. The external device 4 includes an external device control unit 400 that controls the external device 4 and a display operation unit 410 that performs display operations. The external device control unit 400 can be configured by a CPU, a program for operating the CPU, a storage unit, and the like. The external device control unit 400 can also perform information processing by communicating with the image forming apparatus 1. In this case, the external device control unit 400 is connected to the image forming apparatus and handles information related to the image forming apparatus. The external device 4 can function as an information processing control unit, and corresponds to the information processing device of the present invention. Further, the information processing apparatus may function as a management apparatus that controls the image forming apparatus, or may control image formation of the image forming apparatus 1. The network 3 may be used as a WAN in addition to the LAN, and may be wireless or wired.

The external device control unit 400 analyzes the image reading result to determine whether there is an abnormality, a process for removing the abnormality in the image reading unit, and a second reading result obtained by reading the image on the transfer medium by the image reading unit after the removing process And analyzing the image based on the second reading result, and further determining the abnormality of the image on the transfer medium that is the target of the first reading result according to the abnormal state in the analysis, The program executed by the device control unit 400 corresponds to the program of the present invention.
Therefore, in this case, the hardware of the information processing control unit corresponds to the computer of the present invention.
The program of the present invention may be stored in a portable storage unit or the like for distribution and movement, or may be stored in the storage unit of the external device control unit 400 through a network or the like. Also good.

The control block 110 has a PCI bus 112, and a DRAM control IC 111 is connected to the PCI bus 112. The DRAM control IC is connected to the DRAM control IC 161 of the image processing unit (print & scanner controller) 160 via the PCI bus 112.
Further, an image memory 120 including a compression memory 121 and a page memory 122 is connected to the DRAM control IC 111. The compression memory 121 is a memory for storing job management information and compressed image data such as a document. The page memory 122 is a memory for temporarily storing uncompressed image data to be printed before image formation. is there.

  An HDD 127 is connected to the PCI bus 112. The HDD 127 can store information and stores jobs generated by the image forming apparatus 1 and the external apparatus 4 connected to the image processing unit (print & scanner controller) 160. The HDD 127 can store a plurality of jobs. Each job includes information on the entire job, information in units of pages, image data, and printing conditions. Also, the job printing conditions may include information such as real-time abnormality determination ON / OFF setting information and the type of paper to be printed.

The control block 110 includes a control CPU 113, and a DRAM control IC 111 is connected to the control CPU 113.
A ROM 114 and a nonvolatile memory 115 are connected to the control CPU 113. The nonvolatile memory 115 stores programs executed by the control CPU 113, setting data in the image forming apparatus, process control parameters including image forming conditions, and the like.

The nonvolatile memory 115 further includes a program, a program for performing abnormality determination described later, a parameter for abnormality detection, a program and parameters for determining whether an abnormality of the read image is caused by an abnormality of the image reading unit, an image A program for cleaning and inspecting the reading unit 24 is stored so that it can be referred to. Data in the nonvolatile memory 115 may be readable and writable. A part or all of these contents may be stored in the ROM 114, the HDD 127, the RAM, or the like. Further, the non-volatile memory 115 and the HDD 127 can store page information of the paper that has been scraped. In this case, the nonvolatile memory 115 and the HDD 127 correspond to the storage unit of the present invention.
In the ROM 114, a program for causing the control CPU 113 to execute a predetermined operation is readable. The program may be provided from the outside and stored in a nonvolatile memory, an HDD, or the like. The program of the present invention may be stored in a portable storage unit or the like for distribution and movement, or may be stored in the storage unit of the external device control unit 400 through a network or the like. Also good.

  The control CPU 113 can read the nonvolatile data stored in the ROM 114 and the nonvolatile memory 115, and can write desired data in the nonvolatile memory 115 as nonvolatile data. The control CPU 113 controls the operation of each unit of the image forming apparatus 1 according to the setting data.

The control CPU 113 controls the entire image forming apparatus 1, and constitutes the control unit 100 of the present invention together with a program stored in the ROM 114, the nonvolatile memory 115, and the like.
The control CPU 113 performs control for performing adjustment of the image forming apparatus, acquisition of in-machine information of the image forming apparatus, and the like in addition to control for acquisition of image data and image output.
Further, an IO 128 is connected to the control CPU 113 so that signals from various sensors in the image forming apparatus 1 can be acquired, and an image reading result in the image reading unit 24 can be acquired through the IO 128.

  The scanner unit 130 includes a CCD 131 that performs optical reading and a scanner control unit 132 that controls the entire scanner unit 130. The scanner control unit 132 is connected to the control CPU 113 so that serial communication is possible. The CCD 131 is connected to a reading processing unit 116, and the reading processing unit 116 is connected to a compression IC. The reading processing unit 116 processes image data read by the CCD 131, and the compression IC 118 performs image data compression processing. The compression IC 118 is connected to the DRAM control IC 111.

  The operation unit 140 includes an LCD 141 and an operation unit control unit 142 that controls the entire operation unit. The operation unit 140 serves as both a display unit and an operation unit. The operation unit control unit 142 is connected to the control CPU 113 so as to be capable of serial communication. The operation unit control unit 142 can transmit information input from the operation unit 140 to the control CPU 113 and can display a predetermined image according to a command from the control CPU 113.

  The operation unit 140 can perform settings related to each unit of the image forming apparatus 1, and the control CPU 113 controls image formation, sheet conveyance, and post-processing based on the setting contents. Further, the operation unit 140 sets machine settings such as print settings and operation control conditions in the image forming apparatus 1, settings related to output, settings of paper information of each paper feed tray (size, paper type), and output mode settings. (For example, the normal copy mode and the confirmation copy mode), a setting including OnOff for real-time abnormality determination of a job, an instruction for image quality adjustment, and the like are possible. The operation unit 140 can display desired information, such as setting contents and notifications. Therefore, when the paper is scraped, it is possible to display on the operation unit 140 a message to that effect or to prompt the user to clean or inspect the image reading unit.

  Further, the decompression IC 125 is connected to the DRAM control IC 111, and the write processing unit 126 is connected to the decompression IC 125. The decompression IC 125 decompresses the compressed image data. The write processing unit 126 is connected to the LD 151A (laser diode) of the printer unit 150, and processes write data used for the operation of the LD 151A. The printer unit 150 also includes a printer control unit 152 that controls the entire printer unit 150 (paper feeding, image formation, paper discharge, post-processing, etc.). The printer control unit 152 is connected to the image control CPU 113. Yes. The printer control unit 152 controls the printer unit 150 in accordance with a control command from the control CPU 113.

  When the image processing unit (print & scanner controller) 160 uses the image forming apparatus as a network printer or a network scanner, the image forming apparatus 1 receives image data or the like from the external device 4 connected to the LAN 3, The image data acquired by the scanner unit 130 is transmitted to the external device 4 or the like.

  In the image processing unit (print & scanner controller) 160, an image memory (DRAM) 162 is connected to the DRAM control IC 161. The image memory (DRAM) 162 is constituted by a DRAM or the like. In the image processing unit (print & scanner controller) 160, a DRAM control IC 161, a controller control CPU 163, a LAN interface 165, and an HDD 166 are connected to a common bus. The controller control CPU 163 controls the entire image processing unit (print & scanner controller) 160. The LAN interface 165 is connected to the LAN 3.

Next, the basic operation of the image forming apparatus 1 will be described.
First, a procedure for storing image data in the image forming apparatus 1 will be described.
First, a case where the image forming apparatus 1 reads an image with the scanner unit 130 to generate image data will be described.
First, the control CPU 113 issues a command to the scanner unit 130 based on an operation input from the operation unit 140. In the scanner unit 130, the scanner control unit 132 that has received a command from the control CPU 113 controls the operation of the CCD 131, and the CCD 131 optically reads an image from a document. In this case, the document may be read by the automatic document feeder (ADF) 14. Alternatively, an original image may be read by placing an original on the platen glass.

  The image read by the CCD 131 is subjected to data processing by the reading processing unit 116, and the processed image data is compressed by the compression IC 118 by a predetermined method, and the compressed image data is compressed by the DRAM control IC 111 to the compressed memory. 121. Further, when storing in the HDD 127, the image data stored in the compression memory 121 is stored in the HDD 127 via the DRAM control IC 111.

Secondly, a case where image data is acquired from the outside will be described.
The image data is input to the image forming apparatus 1 via the LAN 3. Examples of input image data include data generated by an application program of the external device 4 and data generated by another image forming apparatus. The image data is received by the LAN interface 165 of the image processing unit (print & scanner controller) 160 and temporarily stored in the image memory (DRAM) 162 or the HDD 166 by the DRAM control IC 161. The data once stored is transferred to the DRAM control IC 111 of the copier main body via the PCI bus 112 and then temporarily stored in the page memory 122. The data stored in the page memory 122 is sequentially sent to the compression IC 118 via the DRAM control IC 111 and subjected to compression processing, and stored in the compression memory 121 via the DRAM control IC 111. When storing the compressed data in the HDD 127, the data stored in the compression memory 121 is stored in the HDD 127 via the DRAM control IC 111.

Next, a case where image formation is performed in the image forming apparatus 1 will be described.
When printing is performed by the image forming apparatus 1, the image data stored in the compression memory 121 is sent to the decompression IC 125 via the DRAM control IC 111, and the data is decompressed by the decompression IC 125. When image data stored in the HDD 127 is output as an image, the image data is temporarily stored in the compression memory 121 via the DRAM control IC 111, and then the image data is sent to the decompression IC 125 via the DRAM control IC 111. In the decompression IC 125, the data is decompressed.

Data decompressed by the decompression IC 125 is sent to the write processing unit 126, and write data is generated in the write processing unit 126. The writing data is sent to the LD 151A by the printer unit 150, and writing to the photoconductor 11a is performed by the LD 151A based on the writing data. In the printer unit 150, the printer control unit 152 that receives a command from the control CPU 113 controls each unit such as the main body sheet feeding unit 12, the large capacity sheet feeding device 40, the conveyance path 13, and the image forming unit 11. As a result, the printer unit 150 sequentially performs image formation, transfer to paper, fixing, conveyance to the post-processing apparatus 30 through the conveyance path, post-processing by the post-processing apparatus 30, paper discharge, etc. Is called.
As the image data, data stored in advance in a storage unit such as the nonvolatile memory 115 or the HDD 127 can be used.

  Next, an operation for determining an image abnormality based on read image data obtained by reading an image on a sheet, and an operation when it is determined that the abnormality is a false detection will be described.

  In the image forming apparatus 1, it is possible to determine whether there is an abnormality in the image on the paper by reading the output with the reading device 20 and comparing the read data with the print image data. If there is a difference compared to the print data, it is determined as abnormal, and the output is detected as a scrap.

  However, since the scanned image data is affected by dust adhering to the sensor or scanner glass, even if dust such as paper dust adheres to the sensor, even if there is no problem with the output, the scanned image data A streak-like image remains and it is determined that it is sag.

  Therefore, in this embodiment, when it is determined that the abnormality of the read image acquired by the image reading unit 24 may be caused by the abnormality of the image reading unit 24, the image defect due to dust on the sensor is detected. Considering the possibility, a simple cleaning of the sensor is performed before the next output is read. After that, the image of the next output product is read by the sensor after cleaning, and if no streak-like dirt is detected at the same position as the previous image data in the read image of the next output product, the previous image data is also dust on the sensor. It is determined that the error has occurred, and the previous image data is stored as normal.

If streaks are detected at the same position after cleaning, it is determined that there is no false detection due to dust that can be removed on the sensor, and the previous image data and the currently read image data are stored as errors. . Examples of the stain due to the abnormality of the image reading unit 24 include an image continuous in the sheet conveyance direction, for example, a streak-like stain.
Cleaning the sensor corresponds to the abnormality removing operation of the present invention. The sensor cleaning method is not particularly limited in the present invention, and a desired cleaning method can be adopted as long as it can be performed in a short time, for example, by brushing or gas blowing. Can do.

FIG. 3 is a diagram for explaining a read image when dust such as paper dust is attached to the line sensor of the image reading unit 24.
In FIG. 3, as the job is executed, the sheets P1, P2, P3, and P4 are successively conveyed in order, and after the sheet P1 passes through the line sensor, dust G such as paper dust adheres to the sensor. Shows the state. If the image on the paper P2 is read in this state, the read image includes streak-like stains L. In FIG. 3, the streak-like stain L is drawn on the paper, but actually, the stain on the paper does not exist, and the read image has the streak-like stain L continuous in the paper transport direction. .

  In this embodiment, when streak-like stain L is detected in the read image in the reading result of the paper P2, the sensor is simply cleaned between pages (between paper), and then the image on the paper P3 is read and read. Determine whether there is an abnormality in the image. If the streak-like stain L is detected in the image reading result of the paper P3, the apparatus is stopped due to a mechanical error. When the streak-like stain L is not detected and it is determined that there is no problem, it is determined that there is no problem (defect detection) because it is determined that the sensor is affected by dust. Accordingly, it is determined that the image on the sheet P2, which is the immediately preceding sheet, is not distorted.

If the above determination is made during job output, the output operation is continued. Thereby, the fall of productivity can be prevented. Also, after the job is output, the image on the paper P2 is not stored as a scrap. Thereby, for example, when the read image is displayed on the preview screen, it can be prevented from being displayed as an error.
In the example of FIG. 3, the reading result on the sheet P2 corresponds to the first reading result of the present invention, and the reading result on the sheet P3 corresponds to the second reading result of the present invention.

A detailed procedure of the above operation will be described based on the flowchart of FIG. The following operations are executed under the control of the control unit or the information processing control unit.
A shear analysis is performed as the job is printed (step s1). In the deviation analysis, the read image read by the image reading unit is compared with the print image in the print image data of the job, and a deviation determination is performed based on whether they are the same. The former corresponds to the first reading result of the present invention. It is determined whether or not a mismatch has been detected because they do not match (step s2; the same applies hereinafter). If both are the same and no sag is detected (step s2, No), the procedure is terminated.
If a scrap is detected in step s2 (step s2, Yes), it is determined whether the scrap is likely to be caused by dust (step s3). The determination is made based on whether the stain on the read image is a streak along the paper conveyance direction. If there is no possibility that the scrap is caused by dust (step s3, No), the current page is determined to be scrap (step s9), and the procedure is terminated. The above procedure can be repeated for each page.

If it is determined in step s3 that there is a possibility that the dust is caused by dust (step s3, Yes), the sensor is simply cleaned (step s4), and the image of the next page is read to perform the deviation analysis (step s3). s5) It is determined whether or not the next page has been detected (step s6). When it is not detected that the error has occurred (step s6, No), it is determined that the previous page is not an error (step s10), and the process ends.
On the other hand, if a gap is detected (step s6, Yes), it is determined whether a stain at the same position as the previous page is detected (step s7). If it is a stain at the same position as the previous page (step s7, Yes), it is determined that the previous page and the current page are errors (step s8), and the procedure ends. If it is not dirty at the same position as the previous page (step s7, No), it is determined that the current page is scraped (step s9), and the procedure ends.

  In the above-described embodiment, it is desirable to clean the sensor between sheets, but it is not always necessary to clean between sheets. For example, it may be configured such that the conveyance of the paper is once stopped and cleaning is performed in the meantime. Further, without reading the image on the paper P3, the sensor may be cleaned in the meantime to resume reading from the paper P4 and restart the determination.

(Embodiment 2)
In the above-described embodiment, it is determined whether the cause of the sag is due to dust that can be removed by the image reading unit 24. However, in the case of a system that detects sag in real time, the image reading is performed after the operation of the first embodiment is performed. When it is determined that there is a false detection due to dust on the sensor of the unit 24, the output process is continued, and when it is determined that there is no false detection due to dust on the sensor, the paper is determined to be scraped and the output process is performed. It is possible to cancel and warn and notify the user to clean and check each part. The warning or notification to the user may be performed by displaying a message on the operation unit 140 or the display / operation unit 410 of the external device 4 or may be notified to other devices by communication via a network or the like. Good. The stop of the output process and the warning or notification to the user correspond to the predetermined abnormality process in the present invention.

FIG. 5 is a flowchart showing a detailed procedure of the above operation. The following operations are executed under the control of the control unit or the information processing control unit.
If the analysis of the deviation is performed based on the read image obtained by reading the image on the sheet (step s11), it is determined whether the deviation is detected (step s12). If no error has been detected (step s12, No), the procedure is terminated.
On the other hand, if a file is detected (step s12, Yes), it is determined whether the file is caused by dust (step s13). The determination is made based on, for example, whether the read image is streaked. If the error is not caused by dust (step s13, No), the output process is stopped (step s20), a message that the current page is error is displayed on the panel of the operation display unit 140 (step s21), and the process is performed. finish. The display location of the message is not particularly limited.

On the other hand, if it is determined in step s13 that there is a possibility that the dust is caused by dust (step s13, Yes), simple cleaning of the sensor is performed (step s14), and the next page is analyzed (step s13). Step s15), it is determined whether a failure has been detected on the next page (step s16). If no error is detected (No in step s16), the procedure is terminated. On the other hand, if a gap is detected (step s16, Yes), the output process is stopped (step s17), and it is detected whether the detected dirt is the same position as the previous page (step s18). If it is dirty at the same position as the previous page (step s18, Yes), a message prompting the sensor to be cleaned is displayed on the panel or the like (step s19), and the procedure ends.
On the other hand, if it is not dirty at the same position as the previous page (step s18, No), a message that the current page is jarring is displayed on the panel (step s21), and the procedure is terminated. The display location of the message is not particularly limited, and the display may be performed on the operation display unit 140 or may be performed on the display operation unit 410 of the external device 4.

(Embodiment 3)
In the case of a system that detects an error in real time and switches the output tray when it is determined to be an error, the output destination is changed depending on whether the error is a false detection caused by dust on the sensor. You may do it. For example, based on the above-described embodiment, after determining whether the detected deviation is a false detection due to dust on the sensor, if it is determined that the detection is a false detection due to dust on the sensor, the output processing is continued as usual. If it is determined that it is not a false detection due to dust on the sensor, and the output destination can be switched in the transport path between the image reading device and the paper discharge tray, Is output to the output tray. For example, in the case of erroneous detection, the paper is discharged to the second paper discharge unit 32 as usual, and in the case of no false detection, the paper is discharged to the first paper discharge unit.
If the output destination cannot be switched at the end of the image reading unit, the same processing as in the second embodiment is performed.

FIG. 6 is a flowchart showing a detailed procedure of the above operation. The following operations are executed under the control of the control unit or the information processing control unit.
First, it is determined whether the output destination can be switched downstream of the image reading unit (step s31).
When the output destination cannot be switched (No in step s31), the flow of FIG. 5 is performed. If the output destination can be switched (step s31, Yes), the analysis of the error is performed (step s32), and it is determined whether the error is detected (step s33). In this embodiment, the post-processing unit 30 can switch the paper discharge destination between the first paper discharge unit and the second paper discharge unit.
The detection of the error is performed by comparing the input image data and the read image data. If no error is detected (No at step s33), the procedure is terminated.
If a scrap is detected in step s33 (step s33, Yes), it is determined whether there is a possibility that the scrap is caused by dust (step s34). The determination is made based on whether the read image is streaked. If the scrap is not caused by dust (Step s34, No), the output destination of the current page is switched to the tray for the scrap (Step s41), and the procedure ends.

On the other hand, when it is determined in step s34 that there is a possibility of dust-causing dust (step s34, Yes), simple cleaning of the sensor is performed (step s35), and the image of the next page is read and the error analysis is performed. (Step s36).
Thereafter, it is determined whether or not the next page has been detected (step s37). If no error has been detected (No at step s37), the process ends. In this case, it is determined that the previous page is not a scrap and is discharged to a normal output destination.
On the other hand, if a gap is detected on the next page (step s37, Yes), the output process is stopped (step s38), and it is determined whether a stain at the same position as the previous page is detected (step s39). If it is dirty at the same position as the previous page (step s39, Yes), it is determined that the previous page and the current page are scraped, and the output destination of the previous page and the current page is switched to the tray for the scraping (step) s40). On the other hand, if it is not dirty at the same position as the previous page (step s39, No), it is determined that the previous page is not spoiled but the current page is spoiled, and the output destination of the current page is switched to the spear tray (step s41). ) To finish the procedure.

(Embodiment 4)
In the first to third embodiments, a sheet is assumed. However, when a similar problem occurs in continuous paper such as roll paper, the interval between pages is shorter than that of the sheet, and the interval between images It is usually difficult to clean the sensor. Further, if the machine is stopped, it is necessary to cut the roll paper, which generates unnecessary scrap paper, and there are problems such as troublesome resumption of conveyance.

FIG. 7 shows image reading and image reading results when dust G such as paper dust adheres to the sensor during reading of an image formed on continuous paper.
After the image I1 on the roll paper RP is read by the line sensor of the image reading unit 24, dust G such as paper dust adheres to the sensor, so that a line L appears in the read image after the image I2.
In this embodiment, when streak-like dirt is detected in an image read by the image reading device in a machine that handles roll paper, the next page is not read, and the sensor can be cleaned during that time. Thereafter, reading is resumed on the next page, and streak-like contamination is detected. If no streak is detected, the process continues as a false detection due to dust adhering to the sensor. If streaks are detected, the output process is stopped, and abnormal processes such as prompting the user to clean and inspect each part are performed.

The detailed procedure of the above operation will be described based on the flowchart of FIG. The following operations are executed under the control of the control unit or the information processing control unit.
Analysis of the deviation is performed based on the read image obtained by reading the image on the sheet (step s51), and it is determined whether the deviation is detected (step s52). If no error has been detected (No at step s52), the flow ends.
If a scrap is detected (step s52, Yes), it is determined whether there is a possibility of a scrap due to dust attached to the sensor (step s53). The determination is made based on whether the read image is streaked. When it is determined that there is no possibility of the error due to dust (step s53, No), the output process is stopped (step s61), and a message that the current page is error is displayed on the panel (step s62).

On the other hand, if it is determined that there is a possibility that the dust is caused by dust (step s53, Yes), the analysis of the next page is stopped (step s54), and the sensor is simply cleaned (step s55). When the analysis is stopped, the image reading may be stopped.
After simple cleaning of the sensor, the deviation analysis of the next page is performed (step s56), and it is determined whether the deviation is detected (step s57). If no error is detected (No at step s57), it is determined that the previous page is not error, and the flow ends. On the other hand, if a gap is detected (step s57, Yes), the output process is stopped (step s58), and it is determined whether a stain at the same position as the previous page is detected (step s59). If a stain at the same position as the previous page is detected (step s59, Yes), a message prompting the sensor to be cleaned is displayed on the panel (step s60), and the flow is terminated. On the other hand, if a stain at a position different from the previous page is detected (No at step s59), a message that the current page is jarred is displayed on the panel (step s62), and the flow is terminated.

(Embodiment 5)
In the fourth embodiment, the page immediately after the detection of the streak-like stain is not read, and the sensor is cleaned during that time. Analysis may be performed by performing additional printing of pages that have not been read later. In this case, the user may be notified that additional printing has been performed. As a result, it is possible to make a judgment on all pages.

FIG. 9 is a flowchart showing a detailed procedure of the above operation. The following operation is executed by the control unit of the image forming apparatus.
First, the analysis of the deviation is performed based on the read image obtained by reading the image on the sheet (step s71), and it is determined whether the deviation is detected (step s72). If no error has been detected (No at step s72), the flow ends.
On the other hand, if a scrap is detected (step s72, Yes), it is determined whether there is a possibility of a scrap due to dust attached to the sensor (step s73). The determination is made based on, for example, whether the read image is streaked. If it is determined that there is no possibility of the error due to sensor dust (step s73, No), the output process is stopped (step s81), and a message that the current page is error is displayed on the panel (step s82).

On the other hand, if it is determined that there is a possibility of a sag due to sensor dust (step s73, Yes), the analysis of the next page is stopped (step s74), and the sensor is simply cleaned (step s75). Then, the deviation analysis of the pages is performed one after another (step s76), and it is determined whether the deviation is detected (step s77). If no error is detected (No in step s77), a page that has not been analyzed in step s74 is added to be output at the end of the job (step s83).
On the other hand, if a gap is detected in step s77 (step s77, Yes), the output process is stopped (step s78), and it is determined whether a stain at the same position as the previous page is detected (step s79). When a stain at the same position as the previous page is detected (step s79, Yes), a message prompting the sensor to be cleaned is displayed on the panel (step s80), and the flow is terminated. On the other hand, when a stain at a position different from the previous page is detected (step s79, No), a message that the current page is jarring is displayed on the panel (step s82), and the flow is terminated.

  Although each operation of the first to fifth embodiments has been described as being performed by the control unit of the image forming apparatus 1 or the information processing control unit of the information processing apparatus, a reading control unit is provided in the reading apparatus, and the reading control is performed. A process of acquiring a first reading result obtained by reading an image on a transfer medium by an image reading unit and analyzing the image, and determining that the image read in the analysis has a predetermined abnormality. Processing for removing abnormalities in the image capturing section, obtaining a second reading result obtained by reading the image on the transfer medium by the image reading section after the removal processing, analyzing the image based on the second reading result, and performing the analysis In accordance with the abnormal state, the processing for further determining the abnormality of the image on the transfer medium that is the target of the first reading result may be performed. The processing result can be notified to the control unit of the image forming apparatus, and the control unit can perform abnormality processing. In this case, the reading apparatus may be incorporated in the image forming apparatus or may be connected inline to the image forming apparatus. Furthermore, it is possible to adopt a form in which the image forming apparatus is not mechanically connected.

  As mentioned above, although this invention was demonstrated based on the said embodiment and attached drawing, the scope of the present invention is not limited to the content of description of the said embodiment, Unless it deviates from the scope of the present invention, the said embodiment Appropriate changes to can be made.

1 Image forming device 3 LAN
4 External Device 10 Device Main Body 11 Image Forming Unit 20 Reading Device 24 Image Reading Unit 30 Post-Processing Device 34 Post-Processing Unit 100 Control Unit 113 Control CPU
115 Nonvolatile memory 127 HDD
400 External device control unit G Garbage P1, P2, P3, P4 Paper I1, I2, I3, I4 Image RP Roll paper

Claims (25)

An image forming unit for forming an image on a transfer medium;
A control unit for controlling the image forming unit,
The control unit has a function of acquiring a first reading result obtained by reading an image on the transfer medium by an image reading unit and analyzing the image;
When the image read in the analysis has an abnormality, and it is determined that the abnormality is a predetermined abnormality, a process for removing the abnormality in the image reading unit is performed, and the image reading unit after the removal process performs processing on the transfer medium. The second reading result obtained by reading the image is acquired, the image is analyzed based on the second reading result, and the transfer medium that is the target of the first reading result is analyzed according to the abnormal state in the analysis. An image forming apparatus characterized by further determining an abnormality in the image.   The image forming apparatus according to claim 1, wherein the predetermined abnormality may be caused by an abnormality of the image reading unit.   The image forming apparatus according to claim 1, wherein the predetermined abnormality is an image that is not based on image forming image data and that is continuous in a transfer medium conveyance direction.   If the predetermined abnormal portion in the first reading result is not detected at the same position in the second reading result, the control unit detects the image on the transfer medium that is the target of the first reading result. The image forming apparatus according to claim 2, wherein it is determined that there is no abnormality.   When the control unit determines that there is no abnormality in the image in the analysis of the second reading result and the abnormality in the first reading result is caused by the abnormality of the image reading unit, the target of the first reading result The image forming apparatus according to claim 1, wherein the image on the transfer medium is determined to be normal.   The image forming apparatus according to claim 1, wherein the process of removing an abnormality relates to the removal of an adhering substance in a reading path of the image reading unit.   The image forming apparatus according to claim 6, wherein the deposit is transfer medium waste.   The image forming apparatus according to claim 1, wherein the control unit performs the process of removing an abnormality between pages.   On the transfer medium, when there is a predetermined abnormality in the image as a result of the first reading, the subsequent image is subjected to the processing for removing the abnormality without analyzing the reading result, and is read in the image after the processing. The image forming apparatus according to claim 1, wherein the second reading result is obtained.   The image forming apparatus according to claim 9, wherein the transfer medium is a continuous transfer medium.   The image forming apparatus according to claim 9, wherein the control unit notifies an image that has not been analyzed of a reading result.   12. The image forming apparatus according to claim 11, wherein, in the notification, the control unit outputs an image that has not been analyzed after the end of the job.   The said control part performs a predetermined | prescribed abnormality process, when it determines with there being abnormality in both the said 1st reading result and the said 2nd reading result, The any one of Claims 1-12 characterized by the above-mentioned. The image forming apparatus described in 1.   The image forming apparatus according to claim 1, wherein the control unit performs a predetermined abnormality process when the abnormality in the first reading result is an abnormality other than the predetermined abnormality. .   The image forming apparatus according to claim 13, wherein the control unit stops outputting a job as the predetermined abnormality process.   The image forming apparatus according to claim 13, wherein the control unit determines that the transfer medium is scraped as the predetermined abnormality process.   The image forming apparatus according to claim 13, wherein the control unit notifies a user as the predetermined abnormality process.   The image forming apparatus according to claim 17, wherein the notification prompts cleaning or / and inspection of the image reading unit. It has a discharge switching part that can switch the transfer medium discharge destination between normal discharge destination and defective discharge destination,
The image forming apparatus according to claim 13, wherein the control unit performs output by switching a transfer medium discharge destination to a defective discharge destination as predetermined abnormality processing. A storage unit for storing data in a readable manner;
The image forming apparatus according to claim 1, wherein the control unit stores, in the storage unit, a page that is finally determined to be abnormal by reading.   21. The image forming apparatus according to claim 1, wherein the analysis of the image is for detection of droop or image quality adjustment.   The control unit is configured to determine whether or not there is an abnormality by comparing a reading result read by the image reading unit and a print image in the print image data of the job in the analysis of the deviation detection. Item 22. The image forming apparatus according to Item 21. An image reading unit that reads an image on a transfer medium and obtains a reading result;
A reading control unit for controlling the image reading unit,
The reading control unit has a function of acquiring a first reading result obtained by reading an image on the transfer medium by an image reading unit and analyzing the image, and the image read in the analysis has a predetermined abnormality When the determination is made, a process for removing the abnormality in the image reading unit is performed, a second reading result obtained by reading the image on the transfer medium by the image reading unit after the removing process is obtained, and the second reading result is obtained. An image reading apparatus comprising: analyzing an image based on the image; and further determining an abnormality of the image on the transfer medium that is a target of the first reading result according to an abnormality state in the analysis. An information processing apparatus having an information processing control unit that controls an image reading unit that reads an image on a transfer medium,
The information processing control unit has a function of acquiring a first reading result obtained by reading an image on the transfer medium by an image reading unit and analyzing the image, and the image read in the analysis has a predetermined abnormality. If the image reading unit determines that the image reading unit has removed the abnormality in the image reading unit, the image reading unit after the removing process acquires the second reading result obtained by reading the image on the transfer medium, and the second reading result. An image processing apparatus that analyzes an image based on the image and further determines an abnormality of the image on the transfer medium that is the target of the first reading result according to an abnormality state in the analysis. . A program executed by a computer that controls an image reading unit that reads an image on a transfer medium,
Obtaining a first reading result obtained by reading an image on a transfer medium;
Analyzing an image based on the first reading result;
Determining whether the image read in the analysis has a predetermined abnormality;
Performing a process of removing the abnormality in the image reading unit when there is a predetermined abnormality;
Obtaining a second reading result obtained by reading an image on a transfer medium by the image reading unit after the removal process;
Analyzing an image based on the second reading result;
And a step of further determining the abnormality of the image on the transfer medium which is the target of the first reading result in accordance with the state of abnormality in the analysis.

Images