JPH104468A - Image forming device - Google Patents

Abstract

(57) [Problem] To provide an image forming apparatus capable of accurately detecting an abnormal portion in a unit of a circuit board with a simple configuration and greatly reducing an operation load. In an abnormality detection mode of an image forming apparatus, an integration register on an input side and an output side of each image processing unit when a reference image processing unit performing normal operation is attached to each image processing unit of an image processing unit. Of the integration processing data and the integration processing data of the integration registers on the input and output sides of each image processing unit when the image processing unit to be measured is mounted are arranged in a predetermined format according to the color and the type of image processing. The inspection data sheet printed at the same time is created, and by comparing the corresponding integrated processing data,
Correction unit 2a, color correction unit 2b, editing unit 2c, filter / gradation processing unit 2d, and printer γ
It becomes possible to accurately and promptly determine which of the correction units 2e has an abnormal circuit board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus, and more particularly, to an image forming apparatus having a function of detecting an abnormality in an image processing unit.

[0002]

2. Description of the Related Art In an image forming apparatus such as a copying machine, an abnormality occurs in a board on which an image forming operation is performed, and when a circuit board constituting the board is replaced, the abnormality occurs in any part of the board. Needs to be identified and the corresponding circuit board needs to be replaced.

[0003] For this reason, conventionally, a service technician brought back one or a plurality of boards considered to be abnormally operated from a service site, and brought the board back to an image forming apparatus of the same model which normally operates. Were mounted one by one instead of a normal board, and a board that malfunctioned was identified.

Then, an oscilloscope or a logic analyzer is connected to a predetermined inspection point of the board which is determined to be abnormal in the image forming apparatus, and the image forming apparatus is operated to perform waveform observation and numerical output, and Detecting which circuit board has an abnormality is performed.

On the other hand, in order to detect this kind of abnormality,
JP-A-3-297262 discloses that a display device and a digitizer interactively create a corresponding two-dimensional pattern according to the contents of an inspection and supply the two-dimensional pattern to an image forming apparatus to be inspected. Discloses an inspection apparatus for an image processing system capable of detecting an abnormality up to a board unit.

[0006]

In a conventional image forming apparatus abnormality inspection, a board which seems to be operating abnormally is brought back, replaced with a corresponding board of a normally operating image forming apparatus, and replaced with a corresponding board. In the method of specifying a board with an abnormal operation by performing formation, a service technician needs to make a large number of copies to judge a board that performs an abnormal operation, which makes the judgment work complicated, and especially a full color In the case of an image forming apparatus, copy cost becomes a problem.

Further, an oscilloscope or a logic analyzer is connected to the board determined to be operating abnormally, and the image forming apparatus is operated to perform waveform observation and numerical output. In the method of detecting whether an abnormality has occurred, the number of measurement points is large and the detection operation takes time.

On the other hand, the method disclosed in Japanese Patent Application Laid-Open No. Hei 3-297262 can identify a board that operates abnormally, but requires installation of a device having a complicated configuration, and the equipment cost is problematic. In addition, even if a board that operates abnormally can be specified, it is necessary to further detect which circuit board has an abnormality using an oscilloscope or a logic analyzer.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described current situation of detecting abnormalities in an image forming apparatus. An object of the present invention is to provide an image forming apparatus that can accurately detect a substrate unit.

[0010]

According to one aspect of the present invention, there is provided an image reading section for reading an original to be read and outputting image data, and an image data output from the image reading section. An image processing unit having a plurality of image processing units for performing image processing in corresponding image processing processes, and a writing unit for printing image data image-processed by the image processing unit. An image forming apparatus that performs image formation of the image processing unit, and is provided in each of the plurality of image processing units, and is provided in each of the plurality of image processing units. Output integration means for integrating the output image data of the corresponding image processing unit, and integration processing data of the input integration means and the output integration means. Storage means, an abnormality detection mode setting means for setting an abnormality detection mode for performing image formation for abnormality detection, and when the abnormality detection mode is set, data stored in the storage means are printed by the writing unit. And control means for performing the operation.

[0011] Similarly, in order to achieve the above object, according to a second aspect of the present invention, in accordance with the first aspect of the present invention, data stored in the storage means printed by the writing unit is stored in an image processing unit. It is characterized in that format creating means for arranging in a predetermined format corresponding to each type and color is provided.

According to a third aspect of the present invention, an image reading section for reading an original to be read and outputting image data and an image data output from the image reading section correspond to each other. An image processing unit having a plurality of image processing units for performing image processing in an image processing process to be performed, and a writing unit for printing image data subjected to image processing by the image processing unit. A plurality of image processing units, each of which is provided in each of the plurality of image processing units, and which is provided in each of the plurality of image processing units. Output integration means for performing integration processing of output image data of the image processing unit;
First storage means for storing integration processing data of the input integration means and the output integration means when the reference image processing unit is mounted, and integration of the input integration means and the output integration means when the measured image processing unit is mounted Second storage means for storing processing data, abnormality detection mode setting means for setting an abnormality detection mode for performing image formation for abnormality detection, and when the abnormality detection mode is set, the first storage means Control means for simultaneously printing the data stored in the second storage means in the writing unit.

[0013] Similarly, in order to achieve the above object, the present invention according to claim 4 is different from the invention according to claim 3 in that the first storage means and the second storage means which are printed by the writing unit.
And a format creation unit for arranging the data stored in the storage unit in a predetermined format in accordance with the type and color of the image processing.

[0015] Similarly, in order to achieve the above object, the invention according to claim 5 is different from the invention according to claim 3 or 4 in that the data stored in the first storage means and the data stored in the second storage means are different from each other.
And an abnormality notifying means for determining whether an abnormality has occurred by comparing the data with the data stored in the storage means and notifying the image processing unit determined to be abnormal.

Similarly, in order to achieve the above object, the invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the original to be read in the abnormality detection mode is a first-stage original. It is a pattern generator provided in the image processing unit.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration of a main part of the present embodiment, FIG. 2 is a block diagram showing a configuration of a main part of a γ-ray correction unit of the present embodiment, and FIG.
FIG. 4 is an explanatory diagram showing a format of copy data in the abnormality detection mode according to the embodiment.

In the present embodiment, as shown in FIG. 1, image data B of a read original read by a color scanner is read.
An image processing unit 2 that performs image processing in a plurality of image processing processes is connected to an output terminal of the image reading unit 1 that simultaneously outputs (Blue), G (Green), and R (Red). A writing unit 3 for printing image data output from the image processing unit 2 is connected to the terminal.

The image processing unit 2 is provided with a plurality of image processing units each of which performs a corresponding image processing and is constituted by a circuit board, and is connected to the image reading unit 1 as a first stage image processing unit. A gamma correction unit 2 that converts linear reflectance image data B, G, and R output from the reading unit 1 into linear density image data B ′, G ′, and R ′.
a is connected.

The gamma correction unit 2a includes image data B ', G', and R 'output from the gamma correction unit 2a.
To image data Bk (Black) used for copying,
C (Cyan), M (Magenta), Y (Yell)
ow), and an editing unit 2c that performs editing processing such as scaling is connected to the color correction unit 2b.

The editing unit 2c is connected to a filter / gradation processing unit 2d that outputs input data as it is in character processing and performs gradation processing and output in photographic processing. In the text area, the low-density part is white and the middle-to-high-density part is darkened, so that the display is sharp. Gamma correction unit 2 that corrects the image so that it looks smooth
e is connected and the writing unit 3 is connected to the printer γ correction unit 2e.
Is connected.

The gamma correction unit 2a of the present embodiment includes:
As shown in FIG. 2, there is provided a γ table memory 10B having an input terminal tB1 for image data B and storing γ correction data for converting the image data B into image data B ′.
The γ table memory 10B includes an output terminal tB2 for image data B ′, an input terminal tB1 is connected to an integration register 11B for performing an input image data integration process, and an output terminal tB2 is used for integrating output image data. An integration register 12B for processing is connected.

Similarly, the gamma correction unit 2a is provided with an input terminal tG1 for image data G, and a gamma table memory 10G for storing gamma correction data for converting the image data G into image data G '. γ table memory 10
G has an output terminal tG2 for image data G ', an input terminal tG1 is connected to an integration register 11G for performing integration processing of input image data, and an output terminal tG2 is an integration register for performing integration processing of output image data. The register 12G is connected.

Similarly, the gamma correction unit 2a is provided with a gamma table memory 10R having an input terminal tR1 for image data R and storing gamma correction data for converting the image data R into image data R '. γ table memory 10
R has an output terminal tR2 for image data R ', an input terminal tR1 is connected to an integration register 11R for performing integration processing of input image data, and an output terminal tR2 is configured to perform integration for performing integration processing of output image data. The register 12R is connected.

The integration registers 11B, 12B, 1
The 1G, 12G, 11R, 12R, and γ table memories 10B, 10G, 10R are connected via a bus B to a CPU (not shown) that controls the entire operation. This C
The PU is provided with a setting switch for an abnormality detection mode, and an operation panel through which a service technician performs input during various operations is connected to the PU. Further, the accumulation registers 11B, 12B, 11G,
A memory is connected to store integration processing data obtained by performing integration processing on 12G, 11R, and 12R.

In this embodiment, the color correction unit 2b,
The editing unit 2c, the filter / gradation processing unit 2d, and the printer γ correction unit 2e also basically have the same configuration as the already described γ correction unit 2a,
A table memory in which processing data necessary for each image processing is stored is provided, an input terminal of the table memory is connected to an integration register that performs integration processing of input image data, and an output terminal of the table memory is An integration register for integrating output image data is connected, and the table memory and each integration register are connected via a bus B to a CP.
U, and the CPU is connected to a memory for storing integration processing data obtained by integration processing of integration registers connected to the input terminal and output terminal of each unit.

When the setting switch on the operation panel is operated and the abnormality detection mode is set, the CPU of this embodiment operates as a γ correction unit 2a, a color correction unit 2b, and an editing unit 2c of the image processing unit 2. For each of the filter / gradation processing unit 2d and the printer γ correction unit 2e, the integration processing data in the integration register on the input terminal side and the integration register on the output terminal side are read from the memory and printed on the writing unit 3. There is provided a control means for causing the writing unit 3 to arrange data stored in the memory in a predetermined format in accordance with the type and color of image processing.

The operation of this embodiment having such a configuration will be described. When performing a normal image forming operation, when a document to be read is set in the apparatus and a start button on the operation panel is operated, image data B, G, and R read by the scanner are output from the image reading unit 1. Is input to the γ correction unit 2a. The γ correction unit 2a converts the linear reflectance image data B, G, and R into linear density image data B ′,
Convert to G ', R'.

The image data B ', G', R 'output from the gamma correction unit 2a are
In the color correction unit 2b, the image data B ′, G ′, and R ′ are converted into image data Bk (Black), C (Cyan), M
(Magenta) and Y (Yellow).

[0029]

(Equation 1)

In equation (1), the coefficients r, g, b and the constant d are automatically switched in accordance with the hue division planes of the B, G, R data. The coefficients r, g, b and the constant d are switched to predetermined values.

The image data Bk, C, M, and Y output from the color correction unit 2b are edited by the editing unit 2c.
The editing unit 2c performs editing processing such as scaling on the image data Bk, C, M, and Y based on an editing command from the CPU, and performs editing processing on the image data Bk, C, M and Y are filter / gradation processing units 2
is input to d.

The filter / gradation processing unit 2d outputs the input data as it is at the time of character processing to the edited image data Bk, C, M, and Y, and expresses the gradation in block units at the time of photographic processing. Apply gradation processing,
Image data Bk, C,
M and Y are input to the printer γ processing unit 2e.

In the printer γ correction unit 2e, in the character area, the low density portion is white and the middle density portion to the high density portion are darker with respect to the image data Bk, C, M, Y subjected to the filter / gradation processing. Then, correction is performed so that a clear display is performed, and correction is performed such that the low density portion, the intermediate density, and the high density appear continuously and smoothly in the photographic area.

In this way, the image data Bk, C,
M and Y are input to the writing unit 3, and the writing unit 3 performs a printing operation on the read original based on the image data Bk, C, M, and Y on which the printer γ correction has been performed, and performs an image forming operation. Ends.

Next, an abnormality detecting operation according to the present embodiment will be described. The service technician brings the normally operating γ correction unit 2a, color correction unit 2b, editing unit 2c, filter / gradation processing unit 2d, and printer γ correction unit 2e circuit board as a standard image processing unit to provide a service site. In the image forming apparatus according to the present embodiment, the circuit boards of the γ correction unit 2a, the color correction unit 2b, the editing unit 2c, the filter / gradation processing unit 2d, and the printer γ correction unit 2e which normally operate are set. Also, the original to be read is set in the apparatus, and the setting switch on the operation panel is operated to set the abnormality detection mode.

When the apparatus is started by this operation, the CP
The document to be read is read by the image reading unit 1 in accordance with the instruction of U, and the image data Bk, C, M, and Y
Reading processing and image processing are performed, and γ
Correction unit 2a, color correction unit 2b, editing unit 2c, filter / gradation processing unit 2d, and printer γ
The integration processing of the image data is performed by the integration register on the input terminal side and the integration register on the output terminal side of the correction unit 2e, and the obtained integration processing data is sequentially stored in the memory.

In this manner, when the four reading processes and the image processing, the integration process in the integration register, and the storage of the integration process data in the memory are completed, the respective stored data are stored in the memory by the command of the CPU. Are read out, and the stored data read out are arranged in a format 20 having a format as shown in FIG. 3 according to the type and color of the image processing by the format creating means.

Then, the writing unit 3 is controlled by a command from the CPU.
Is activated, and in a predetermined format 20 created by the format creating means, the integration processing data at the input terminal side and the integration processing data at the output terminal side of each image processing unit during normal operation are converted into the respective color and image data. It is printed in association with the type of processing.

Next, the service technician turns off the power of the image forming apparatus according to the present embodiment, and operates the standard image processing units (γ correction unit 2a, color correction unit 2b, edit unit 2c, filter unit (Circuit boards of the gradation processing unit 2d and the printer γ correction unit 2e)
Is removed from the apparatus, and the image processing units to be measured (the circuit boards of the γ correction unit 2a, the color correction unit 2b, the editing unit 2c, the filter / gradation processing unit 2d, and the printer γ correction unit 2e) mounted before replacement are removed. Attach and return the device to its original state.

In this state, the same original to be read is set in the apparatus, the power is turned on, the setting switch is operated, the abnormality detection mode is set, and the abnormality detection operation is started.

In this abnormality detecting operation, the reading process and the image processing are performed four times on the image data Bk, C, M, and Y on the original to be read in accordance with the command of the CPU in the same manner as the previous time. Γ correction unit 2a, color correction unit 2b, editing unit 2c, filter / gradation processing unit 2d, and integration register and output terminal on the input terminal side of the printer γ correction unit 2e, which are image processing units to be measured of the image processing unit 2. The image data is integrated by the integration register on the side, and the obtained integration processing data is sequentially stored in the memory.

As described above, when four reading processes and image processes are completed using the measured image processing unit, C
Each storage data is read from the memory by the instruction of the PU, and the stored storage data is read by the format creation means in accordance with the type and color of the image processing.
Format 20 as shown in FIG. 3 as before.
It is arranged in.

Then, the writing section 3 operates according to a command from the CPU, and corresponds to the input side and the output side of each image processing unit in a predetermined format 20 created by the format creating means, and corresponds to each color. The integrated processing data of each integrated register is printed.

In this manner, when the standard image processing unit that normally operates is mounted, the integration processing data of the integration register on the input terminal side and the integration processing data on the output terminal side of each image processing unit is color-coded. The reference data sheet printed in a predetermined format 20 corresponding to different and image processing types, and the integration processing data in the integration register on the input terminal side and the integration register on the output terminal side of the image processing unit to be measured have the same format. The inspection data sheet printed in step (a) is created, and the two are compared by a service technician, so that the γ correction unit 2a, the color correction unit 2b, the editing unit 2c, the filter / gradation processing unit of the image processing unit 2 It is accurately determined which of the circuit board 2d and the printer γ correction unit 2e is abnormal.

As described above, according to the present embodiment, the service technician sets the abnormality detection mode at the service site by mounting the reference image processing unit which carries out normal operation to the apparatus. Thereby, the integration processing of the image data is performed by the integration registers respectively connected to the input terminal and the output terminal of the reference image processing unit, the obtained integration processing data is stored in the memory, and the integration read out from the memory is performed. A reference data sheet is created in which the processing data is printed in a predetermined format 20 according to the type of image processing and the color.

Next, the reference image processing unit is removed from the apparatus, and an abnormality inspection mode is set with the image processing unit to be measured mounted on the apparatus.
An inspection data sheet is printed in which the integration processing data of the integration registers respectively connected to the input terminal and the output terminal of the image processing unit to be measured are printed in the same format. By comparing the integrated processing data with the paper in association with the type of image processing and the color, the γ correction unit 2a, the color correction unit 2b, the editing unit 2c,
It is possible to accurately and promptly determine on-site whether the circuit board corresponding to the filter / gradation processing unit 2d or the printer γ correction unit 2e is abnormal.

[Second Embodiment] A second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an explanatory diagram showing a format of copy data in the abnormality detection mode according to the present embodiment.

In the present embodiment, when a reference image processing unit that performs a normal operation is mounted as a memory connected to the CPU, the γ correction unit 2a, the color correction unit 2b, the editing unit 2c, the filter A first memory for storing integration processing data obtained by an integration register connected to the input terminal and output terminal of the gradation processing unit 2d and the printer γ correction unit 2e; Γ correction unit 2a, color correction unit 2b, editing unit 2 mounted on the unit 2.
c, a second storage of integration processing data obtained by an integration register connected to the input and output terminals of the filter / gradation processing unit 2d and the printer γ correction unit 2e.
Memory.

Further, in the present embodiment, the CPU is provided with the image processing unit 2 corresponding to the case where the standard image processing unit which normally operates and the case where the image processing unit to be measured are mounted in the abnormality detection mode. Correction unit 2
a, color correction unit 2b, editing unit 2c, filter / gradation processing unit 2d, and printer γ correction unit 2
Control means is provided for reading integration processing data in the integration register on the input terminal side and the integration register on the output terminal side of e from the first memory and the second memory, respectively, and causing the writing unit 3 to print simultaneously. The data stored in the first memory and the second memory printed by the writing unit 3 is
There is provided a format creating means for arranging in a predetermined format corresponding to each type and color of image processing.

The structure of the other parts of the present embodiment is the same as that of the first embodiment already described, and will not be described again.

An abnormality detection operation according to the present embodiment will be described. In the present embodiment, first, the service technician determines that the γ correction unit 2a and the color correction unit 2b operate normally.
With the circuit boards of the editing unit 2c, the filter / gradation processing unit 2d, and the printer γ correction unit 2e set in the apparatus as a standard image processing unit, and with the original to be read set in the apparatus, set the setting switch on the operation panel. Operate to set the abnormality detection mode.

When the apparatus is started in this state, the original to be read is read by the image reading section 1 in accordance with a command from the CPU.
The reading processing and the image processing are performed four times for each color of the image data Bk, C, M, and Y, and the γ correction unit 2a, the color correction unit 2b, the editing unit 2c,
The integration processing of the image data is performed by the integration register on the input terminal side and the integration register on the output terminal side of the filter / gradation processing unit 2d and the printer γ correction unit 2e, and the obtained integration processing data is sequentially stored in the first memory. Is done.

Next, the service technician turns off the power of the apparatus, and replaces the standard image processing unit with the γ correction unit 2a, which is the image processing unit to be measured, which was mounted on the apparatus before the standard image processing unit was mounted. Color correction unit 2
b, editing unit 2c, filter / gradation processing unit 2
d and the circuit board of the printer γ correction unit 2e are mounted on the apparatus. In this state, the same original to be read is set on the apparatus, the power is turned on, the setting switch is operated to set the abnormality detection mode, and the abnormality detecting operation is performed. To start.

In this abnormality detecting operation, the image data Bk, C, M, and Y are read four times for the original to be read in accordance with a command from the CPU in the same manner as when the standard image processing unit is mounted. Image processing is performed, and the γ correction unit 2a, the color correction unit 2b,
The integration register on the input terminal side and the integration register on the output terminal side of the editing unit 2c, the filter / gradation processing unit 2d, and the printer gamma correction unit 2e perform integration processing of image data, and obtain integrated processing data. Are sequentially stored in the second memory.

In this way, the integration processing when the reference image processing unit that normally operates and the integration processing when the image processing unit to be measured are mounted are completed, and the obtained integration processing data is stored in the first memory and the second memory. When the storage in the second memory is completed, the respective storage data is read from the first memory and the second memory by the command of the CPU, and the read storage data is converted into the type and color of the image processing by the format creating means. Correspondingly, they are arranged in a format 21 having a format as shown in FIG.

Then, the writing unit 3 is controlled by a command from the CPU.
Is activated, and in the predetermined format 21 created by the format creating means, each time when the reference image processing unit is mounted and when the measured image processing unit is mounted, each corresponding to the type and color of the image processing unit. An inspection sheet on which the integration processing data of the integration register is printed at the same time is created.

The other operation of the present embodiment is the same as the operation of the first embodiment already described, and will not be described again.

According to the present embodiment, the integration processing data in the integration registers on the input side and the output side of each image processing unit when the reference image processing unit is mounted, and each image processing when the image processing unit to be measured is mounted. Inspection data sheets in which the integration processing data in the integration registers on the input side and the output side of the unit are arranged in a predetermined format 21 corresponding to the color and image processing types and simultaneously printed are created. By comparing the corresponding integrated processing data, a circuit board corresponding to any of the γ correction unit 2a, the color correction unit 2b, the editing unit 2c, the filter / gradation processing unit 2d, and the printer γ correction unit 2e of the image processing unit 2 Can be accurately and promptly determined as to whether or not is abnormal.

[Third Embodiment] A third embodiment of the present invention will be described. In the present embodiment, the storage data of the first memory and the storage data of the second memory corresponding to the storage data are preset in the CPU in the second embodiment described above. Compare with the predetermined criteria,
An abnormality notification unit is provided for determining the abnormality of the corresponding image processing unit and for notifying the image processing unit determined to be abnormal.

The structure of the other parts of the present embodiment is the same as that of the second embodiment already described, and therefore, will not be described repeatedly.

In the present embodiment, the integration processing in the integration registers on the input and output sides of each image processing unit is performed according to a command from the CPU when the reference image processing unit is mounted and when the measured image processing unit is mounted. As shown in FIG. 4, when the data is simultaneously printed in the format 21 corresponding to the color and the image processing type, the abnormality notifying means is used when the reference image processing unit is mounted and when the measured image processing unit is mounted. The integrated processing data corresponding to the time is compared with a predetermined reference set in advance to determine whether an abnormality has occurred, and an inspection sheet having an abnormal operation mark printed in a column of the integrated processing data determined to be abnormal is created. Is done.

For this purpose, by reading the image processing unit corresponding to the column marked with the abnormal operation of the created inspection sheet, the γ correction unit 2 of the image processing unit 2 is read.
a, color correction unit 2b, editing unit 2c, filter / gradation processing unit 2d, and printer γ correction unit 2
It is determined which of the circuit boards e is abnormal.

The other operation of the present embodiment is the same as the operation of the second embodiment already described, and will not be described again.

As described above, according to the present embodiment, the second
In addition to the effects obtained in the embodiment, the integration processing data in the integration registers on the input side and the output side of each image processing unit when the reference image processing unit is mounted and when the image processing unit to be measured is mounted. , Predetermined format 2
In the inspection sheet printed at the same time in step 1, an abnormal operation mark is added to the column of integrated processing data determined to be abnormal by the abnormality notification means, so that the γ correction unit 2a and the color correction unit of the image processing unit 2 2b, editing unit 2
c, it is possible to quickly and accurately detect which of the circuit board corresponding to the filter / gradation processing unit 2d and the printer γ correction unit 2e is abnormal without any artificial detection error.

In each of the embodiments, the case where the copy operation of the original to be read is not performed in the abnormality detection mode has been described. However, the present invention is not limited to each embodiment, and the image processing unit is not limited thereto. It is also possible to configure to copy the document to be read together with the copy of the integration processing data.

Further, in each embodiment, in the abnormality detection mode, a case has been described in which abnormality detection is performed using a document to be read selected by a service technician. However, the present invention is limited to each embodiment. Instead, a pattern generator is provided in the first stage image processing unit, and in the abnormality detection mode, abnormality detection is performed using this pattern generator, simplifying the detection operation, and based on a common pattern,
It is also possible to adopt a configuration in which abnormality detection is performed more accurately.

[0067]

According to the first aspect of the present invention, in the abnormality detection mode, the control means is provided in each of the plurality of image processing units, and integrates input image data or output image data of the corresponding image processing unit. The stored data is read out from the storage means in which the integration processing data of the input integration means and the output integration means are stored, and is printed by the writing section by the control means. And a print of the stored data when the image processing unit to be measured is mounted, and comparing the generated prints, it is possible to selectively detect an abnormal image processing unit.

According to the second aspect of the present invention, in addition to the effect obtained by the first aspect of the present invention, by the format creating means, the data stored in the storage means printed by the writing unit is determined by the type of image processing and Since the data is arranged in a predetermined format corresponding to each color, it is possible to accurately determine the type of image processing and the color of the stored data to be printed, and to efficiently perform the abnormality detection processing.

According to the third aspect of the present invention, in the abnormality detection mode, the control means is provided in each of the plurality of image processing units, and performs integration processing of input image data or output image data of the corresponding image processing unit. A first storage unit that is provided for the input integration unit and the output integration unit and stores integration processing data when the reference image processing unit is mounted;
The integration processing data when the reference image processing unit is mounted is stored from the storage means, and the integration processing data when the measurement image processing unit is mounted is stored from the second storage means. The integration processing data when the measurement image processing unit is mounted Are read and printed simultaneously by the writing unit by the control means, so that an abnormal image processing unit can be accurately and quickly selected and detected.

According to the fourth aspect of the present invention, in addition to the effect obtained by the third aspect of the present invention, the first storage means and the second storage means printed by the writing unit by the format creation means are provided. Since the stored data is arranged in a predetermined format according to the type and color of the image processing, the type and color of the image processing of the stored data to be printed are accurately determined, and the abnormality detection processing is efficiently performed. It is possible to do.

According to the fifth aspect of the present invention, in addition to the effects obtained by the third or fourth aspect of the present invention, the abnormality notification means stores the data stored in the first storage means and the second storage means. An abnormality is determined by comparing with the stored data of the image processing unit, and a designation notification of the image processing unit determined to be abnormal is performed. Therefore, the abnormal image processing unit is accurately notified, and the detection of the abnormality is artificially detected. Without the need to do so quickly and accurately.

According to the sixth aspect of the present invention, in addition to the effects obtained by the first aspect of the present invention, the pattern generator provided in the first stage image processing unit in the abnormality detection mode. Is used as an original to be read, and the image formation for abnormality detection is performed, so that the operation of abnormality detection is simplified, and more accurate abnormality detection can be performed based on a common reference pattern.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a main part of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a main part of the γ-ray correction unit of the embodiment.

FIG. 3 is an explanatory diagram showing a format of copy data in an abnormality detection mode according to the embodiment;

FIG. 4 is an explanatory diagram showing a format of copy data in an abnormality detection mode according to the second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 image reading unit 2 image processing unit 2a gamma correction unit 2b color correction unit 2c editing unit 2d filter / gradation processing unit 2e printer gamma correction unit 3 writing unit 10B, 10G, 10R gamma table memory 11B, 11G, 11R integration register 12B, 12G, 12R accumulation register

Claims (6)

[Claims] An image reading unit that reads an original to be read and outputs image data; and a plurality of image processing units that perform image processing on image data output from the image reading unit in corresponding image processing processes. An image forming apparatus, comprising: an image processing unit; and a writing unit that prints image data that has been subjected to image processing by the image processing unit. The image forming apparatus forms an image of the read document, and is provided in each of the plurality of image processing units. Input integration means for performing integration processing of input image data of the corresponding image processing unit; output integration means provided in each of the plurality of image processing units and performing integration processing of output image data of the corresponding image processing unit. A storage unit for storing integration processing data of the input integration unit and the output integration unit; and an abnormality detection mode for forming an image of abnormality detection. An abnormality detection mode setting means for constant, when the abnormality detection mode is set, the data stored in the storage means, the image forming apparatus characterized by a control means for printing by the writing unit. 2. The image forming apparatus according to claim 1,
An image forming apparatus, comprising: a format creating unit that arranges data stored in the storage unit printed by the writing unit in a predetermined format according to a type and a color of image processing. 3. An image reading unit for reading an original to be read and outputting image data, and a plurality of image processing units for performing image processing on the image data output from the image reading unit in corresponding image processing processes. An image forming apparatus, comprising: an image processing unit; and a writing unit that prints image data that has been subjected to image processing by the image processing unit. The image forming apparatus forms an image of the read document, and is provided in each of the plurality of image processing units. Input integration means for performing integration processing of input image data of the corresponding image processing unit; output integration means provided in each of the plurality of image processing units and performing integration processing of output image data of the corresponding image processing unit. A first storage unit for storing integration processing data of the input integration unit and the output integration unit when the reference image processing unit is mounted; Second storage means for storing integration processing data of the input integration means and the output integration means when the image processing unit is mounted; abnormality detection mode setting means for setting an abnormality detection mode for performing image formation for abnormality detection; An image forming apparatus comprising: a control unit configured to simultaneously print data stored in the first storage unit and the second storage unit in the writing unit when the abnormality detection mode is set. 4. An image forming apparatus according to claim 3,
A format creating unit is provided for arranging the data stored in the first storage unit and the second storage unit printed by the writing unit in a predetermined format in accordance with the type and color of image processing. An image forming apparatus. 5. The image forming apparatus according to claim 3, wherein an abnormality is determined by comparing data stored in said first storage means with data stored in said second storage means. An image forming apparatus provided with an abnormality notifying unit for notifying a designated image processing unit determined to be abnormal. 6. The image forming apparatus according to claim 1, wherein the document to be read in the abnormality detection mode is a pattern generator provided in a first-stage image processing unit. Characteristic image forming apparatus.