JPH1070627A - Image processor and copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly replace a faulty circuit by specifying a faulty part of a circuit for image processing and informing the located part of the circuit to a service center. SOLUTION: Circuit parts 200, 214 of an image processor 111 are configured on separate boards, and a route passing through the circuit part 214 and a route not passing through the circuit part 214 are set for processing routes of image signals received from an A/D converter section 202, data of a prescribed pattern are processed by the processing routes and the presence of a fault in the circuit parts 200, 214 is discriminated based on the processing result. The discrimination result is sent to an external equipment installed to a service center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an image processing apparatus and a copying apparatus.

[0002]

2. Description of the Related Art Conventionally, an image processing apparatus such as a copying machine having a plurality of image processing circuit boards has a function as to whether or not the image processing circuit board is broken when an abnormality occurs in an output image. It is difficult to judge whether or not, and to specify a failed board.

[0003] Therefore, first, the user finds an abnormality in the image, then the user contacts the service center, and the serviceman checks the failure at the site, and then returns the part or device to the service center for repair. Later, a step was needed to deliver it to the user.

[0004]

Therefore, there is a disadvantage that it takes time from the occurrence of an abnormality in the output image of the image processing apparatus to the normal state.

An object of the present invention is to provide an image processing apparatus and a copying apparatus which can specify a circuit to be replaced among a plurality of image processing circuits and promptly notify an external apparatus installed in a service center or the like. It is in.

[0006]

According to the present invention, there is provided an image processing apparatus having a plurality of processing routes for processing image data, a changing means for changing the processing route, and generating predetermined test image data. Generating means for supplying the test image data to the processing route, control means for changing the processing route by the changing means, and flowing the test image data generated by the generating means to the plurality of processing routes; A determination unit that determines a failure location based on the test image data flowing from each of the processing routes; and a transmission unit that transmits a determination result of the determination unit to an external device.

A copying apparatus according to the present invention comprises a reading means capable of reading an image of a document, a recording means capable of recording an image, and processing of image data read from the reading means to output recording data to the recording means. Changing means for changing the processing route, generating means for generating predetermined test image data and supplying the test image data to the processing route, and the changing means Control means for changing the processing route, and flowing the test image data generated by the generating means to the plurality of processing routes; and a failure portion based on the test image data flowing from each of the processing routes. It is characterized by comprising a determining means and a transmitting means for transmitting a result of the determination by the determining means to an external device.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

First Embodiment Hereinafter, a color image forming apparatus according to a first embodiment of the present invention will be described.

(Overall Configuration) FIG. 1 is a schematic sectional view of a color image forming apparatus of the present embodiment.

A document 109 is placed on a platen glass 110 and is exposed and scanned by an exposure lamp 101,
The reflected light image from the original 109 is reflected by the reflection mirrors 103 and 10.
4 through a lens 105 through a full-color sensor 106
To obtain a color separation image signal. The color-separated image signal passes through the A / D conversion / amplification unit 107, is processed by the image processing unit 111, and then enters the laser driver 112.

A photosensitive drum 119, which is an image carrier, is rotatably supported in the direction of an arrow. Around the photosensitive drum 119, four developing units 128, 129, and 13 of different colors are provided.
0, 131 are arranged. In the laser exposure optical system,
The image signal is converted into an optical signal by a laser output unit 115 driven by a laser driver 112. Then, the converted laser light is reflected by the polygon mirror 116, passes through the lens 117 and the mirror 118, and passes through the photosensitive drum 1
It is projected on the 19th surface.

When forming an image in the printer unit, first, the photosensitive drum 119 is rotated in the direction of the arrow, and a light image for each separation color is irradiated on the photosensitive drum 119 to form a latent image.

Next, by operating a predetermined developing device, the latent image on the photosensitive drum 119 is developed, and a toner image based on a resin is formed on the photosensitive drum 119.

Further, the toner image on the photosensitive drum 119 is transferred to a recording material supplied to a position facing the photosensitive drum 119. The recording material is supplied from a recording material cassette 126 or 127 to a position facing the photosensitive drum 119 via the transport system 120 and the transfer drum 122.
As the transfer drum 122 is rotated, the toner image on the photosensitive drum is transferred onto the recording material carried on the transfer drum 122.

In this manner, a desired number of color images are transferred to the recording material, and a full-color image is formed. In the case where a full-color image is formed, when the transfer of the four color toner images is completed in this way, the recording material is separated from the transfer drum 119 and the fixing device 123 having the fixing rollers 124 and 125.
Is discharged to the tray 132 via the.

Further, the present apparatus can communicate with an external device by the I / F unit 113. For example, by connecting to a commercially available modem unit, it is possible to communicate with a personal computer at a service base of a copying machine using a public telephone line.

The I / F unit 113 shown in FIG. 1 is connected to the I / F conversion unit 150, and can communicate with the external device 151 via the I / F conversion unit 150. I / F
The conversion unit 150 is a known circuit that converts the serial communication of the CPU in the copying apparatus into a public telephone line standard. The external device 151 is installed at a service center or the like.

FIG. 2 is a block diagram for explaining the image processing unit 111 of FIG. In FIG. 2, portions 200 and 214 surrounded by dotted lines are image processing circuits formed on separate substrates.

Reference numeral 201 denotes a three-line CCD for separating reflected light from a document and converting the reflected light into an electric signal, which corresponds to the full-color sensor 106 in FIG. 202 is a CCD 201
A to convert analog RGB signals from
1 is an A / D conversion amplifying unit 1 in FIG.
07. The shading correction unit 203 uses the CC
The sensitivity of each pixel of D201 is corrected to correct the inclination of the light amount of the light source. The A / D converter 202 outputs R
(Red), G (green) and B (blue) signals are 8
It is output as a bit digital image signal.

In the CCD 201, three CCD line sensors for R (red), G (green), and B (blue) are respectively arranged at a certain distance, and digital signals from these CCD line sensors are provided. The image signal is a signal having a time shift generated by the spatial shift, and such a time shift is corrected in the three-line connection unit 204 in FIG.

The input masking unit 205 includes a CCD 201
Is performed to correct the RGB spectral characteristics to the standard RGB space. The LOG conversion unit 206 is a look-up table composed of a RAM, and includes R (red), G
(Green) and B (blue) luminance signals
(Cyan), M (magenta), and Y (yellow) are converted into density signals.

The masking / UCR unit 207 performs an operation of removing dust from the input C (cyan), M (magenta), and Y (yellow) density signals to the color of toner used for print recording, and Bk ( Black) signal. An F value correction unit 208 is a correction table for correcting a density value (F value) for each color in accordance with designation of a density to be printed. A scaling unit 209 is a scaling circuit that changes the size of an image. is there.

(Control Unit) The control unit 211 in FIG.
It is in the I / F unit 113 in the middle. FIG. 3 is a block diagram of the control unit 211.

Reference numeral 301 denotes a microcomputer (hereinafter referred to as "CPU") for controlling the apparatus.
01 read signal CPU-RD * and CPU 31
A write signal CPU-WR * of 0 is output. Also, C
PU-Dat is a data bus of CPU 301, CPU-A
dr is an address bus of the CPU 301. 302 is
RO storing a program for operating CPU 301
M and 303 are RAMs used as work areas for executing various programs, and 304 is an input / output port (hereinafter referred to as “I / O port”) connected to the CPU 301. ADD-IN signal, CPU-ACC signal, SH-
ACC signal, VO / SMP * signal, PG signal, COLO
The R signal is a signal output from the I / O port 304. Further, a serial communication controller 309 for performing serial communication with an external device is connected to the CPU 301.

The communication signal 320 of the serial communication controller 309 of FIG. 3 is input / output through the I / F converter 150 of FIG. That is, the serial communication controller 30
9 is connected to the external device 151 via the I / F converter 150.

Reference numeral 306 denotes a basic clock V for processing an image.
An oscillator for generating CLK, whose output is frequency-divided by a frequency dividing circuit 307 by four becomes VCLK. Also,
VCLK is counted by the counter 308, and a synchronizing signal LSYNC for each line as shown in FIG. 6 is generated.

In FIG. 2, reference numeral 210 denotes a tristate buffer. When the ADD-IN signal is "1", the output of the tristate buffer 210 becomes high impedance, and the image signal is transmitted to the masking / UCR unit 20.
7, image processing unit 213, tri-state buffer 21
2, and flows in the order of the F value correction unit 208. Conversely, ADD-I
When the N signal is “0”, the image signal is masking / UC
The flow flows in the order of the R unit 207, the tristate buffer 210, and the F value correction unit 208. The image processing unit 213 is a unit that performs processing such as extracting an outline of an image.

(Shading Correction Unit) The shading correction unit 203 in FIG. 2 corrects the sensitivity of each pixel of the CCD 201 and corrects the inclination of the light amount of the light source as described above. 4A, a block 401 for a signal of Red (Red) as shown in FIG. 4A, a block 402 for a signal of Green (Green) as shown in FIG.
It comprises a block 403 for a Blue signal as shown in FIG. 3C, and each of the blocks 401 to 403 is composed of exactly the same circuit except that the input signal is different.

FIG. 5 is a detailed block diagram of the block 401 for the Red signal.

In FIG. 5, reference numeral 504 denotes a multiplier;
The output data of M503 is multiplied by the input image data R1. In the normal copy mode, VO / SMP * is “1” and SH-ACC is “0”. At that time, the output of the counter 506 input from the A terminal of the selector 502 is input as the address of the RAM 503. RA
A value corresponding to the correction value for each pixel is written in M503 in advance by the CPU 301. When reading and writing data in the RAM 503 by the CPU 301, the SH-ACC
To “1”. When the SH-ACC is set to “1”, the selectors 501, 502, 508, and 509 are respectively connected to the B terminal and the Y terminal, and the RAM 503 has the CPU address bus CPU-Adr and the CPU data bus CPU-Da.
t is connected, and the CPU-RD * and CPU-WR * signals can be input.

When SH-ACC is "0" and VO / SMP * is "0", while LSYNC is "0", RAM 50
3 is input to the RE * terminal and “0” is input to the WE * terminal.
1 data is written. Thereafter, SH-ACC is set to “1”, and the CPU 301 reads this data and rewrites the data in the RAM 503 to a correction value for each pixel.

When the PG is "0", it is in the normal copy mode, and the output of the multiplier 504 is set to R2 as the selector 50.
5 is output. When VO / SMP * is “1” and PG is “1”, the data in the RAM 403 is output from the selector 505 as it is. Therefore, if data of a predetermined pattern is written in the RAM 503 by the CPU 301, the RAM 503 can function as a pattern generator. For example, if data from "0" to "255" is repeatedly written to all addresses in order from address 0 of the RAM 503, data from "0" to "255" is repeatedly output as R2.

Similar to the Red signal block 401 in FIG. 5, the Green and Blue signal blocks 402 and 403 are constituted, and their input image data are denoted by G1 and B1. Output G
2, B2.

(Magnifier) In a digital full-color copying machine, magnification in the main scanning direction is controlled by controlling writing and reading of image data to and from magnification memories (RAM) 217 and 218 (see FIG. 2). Done in In other words, if the same image data is continuously read from the memory, the image is enlarged, and if the image data to be written to the memory is thinned out and written, the image is reduced. The address generator 222 is a counter, and generates an address for the RAMs 217 and 218. Signals for controlling writing and reading of the RAMs 217 and 218 are input to the W / R * terminals.

When the CPU-ACC becomes "1", the selectors 221, 219, and 216 are connected to the B terminal and the Y terminal.
Adr, CPU data bus CPU-Dat are connected,
In addition, CPU-RD * can be input. Therefore, when the CPU-ACC is set to “1” at the time of self-diagnosis or the like,
The CPU 301 can read the data in the scaling RAM 218.

(Self-diagnosis operation) The self-diagnosis is performed at the time of turning on the power and while waiting for the machine to wait up. The procedure will be described with reference to the flowcharts of FIGS.

First, in step S701, SH-ACC is set to "1", and in step S702, data from "0" to "255" are sequentially repeated from address 0 of the shading correction RAM of the shading correction unit 203 to all addresses. Write it down. This data constitutes a test chart for diagnosis. The shading correction RAM 503 in FIG. 5 is for Red (Red), and is for Green.
RAM for n (green), R for Blue (blue)
AM is similarly present in 402 and 403 of FIGS. 4B and 4C, respectively. FIG. 1 shows all the addresses (for 5000 pixels) of the shading correction RAM.
Data from 0 to 255 is repeatedly written as 1, for example.

In step S703, VO / SMP * is set to “1”, PG is set to “1”, and “0” is changed to “25”.
5 "is repeatedly output to the three-line connection unit 204 as R2, G2, and B2.

In step S704, the three-line connection unit 2
04, an input masking unit 205, a LOG conversion unit 206,
The masking / UCR unit 207, the image processing unit 213, the F value correction unit 208, and the scaling unit 209 are set so that each input data is output as it is without correction, image processing, scaling, and the like. This setting enables a failure location to be found by checking whether data written to the shading correction unit 203 at the time of self-diagnosis matches data written to the scaling RAM 218.

As an example, the masking / UCR unit 207
A method for setting the input data to be output as it is without correction will be described.

The masking / UCR unit 207 in FIG.
The bit COLOR signal is input. This COLOR
The signal is output from the I / O port 304 in FIG.
Generates M '(magenta), C' (cyan), Y '(yellow), and BK (black) signals in sequence from the M (magenta), C (cyan), and Y (yellow) signals input to. In this case, it is a signal for switching the output color in a frame sequential manner. That is, when the COLOR signal is “0”, the M ′ (magenta) signal is “1”, the C ′ (cyan) signal is “1”, the Y ′ (yellow) signal is “2”, and the BK signal is “3”. (Black) signal is output.
Masking / UCR section 207 generates M ', C', Y ', and BK signals for the input signal by the following operation.

[0042]

M ′ = aM × M + bM × C + cM × Y + dM × BK C ′ = aC × M + bC × C + cC × Y + dC × BK Y ′ = aY × M + bY × C + cY × Y + dY × BK BK = min (M, C, Y) Therefore, in the self-determination mode,

[0043]

## EQU2 ## aM = bC = cY = 1, bM = cM = aC = cC = aY = bY = dM = dC = d
By setting Y = 0,

[0044]

It is assumed that M '= M C' = C Y '= Y

Next, in step S705, ADD-
Set IN to “1”. If the ADD-IN signal is set to “1”, the signal passes through the image processing unit 213.

Then, in step S706, COL
OR is set to “0” so that the M signal is output from the output of the masking / UCR unit 207. In this state,
In step S707, CPU-ACC is set to “1”, and the CPU 301 reads the image data written in the scaling RAM 218 in step S708. In step S709, if the data read by the CPU 301 is a repetition of “0” to “255”,
It is determined that both 0 and 214 are normal, and step S7
Proceed to 10. If an abnormality is found in the data read by the CPU 301, the process proceeds to step S720.

Next, in step S710, the CPU-ACC
Is set to “0”, and COLOR is set to “1” in step S711.
The C signal is output from the output of the masking / UCR unit 207. Then, in step S712, C
PU-ACC is set to “1”, and the image data written in the scaling RAM 218 in step S713 is
Read. Then, in a step S714, it is determined whether or not the read image data is normal.

If it is determined in step S714 that it is normal, the process proceeds to step S715, and if it is determined that it is abnormal, the process proceeds to step S720.

In step S715, the CPU-AC
C is set to “0”, and in step S716, COLOR
Is set to “2” so that the Y signal is output from the output of the masking / UCR unit 207. Then, step S7
At step S17, CPU-ACC is set to "1".
The image data written to the scaling RAM 218 by CP
U301 reads. Then, in step S719,
It is determined whether or not the read image data is normal. If normal, the process proceeds to step S740, where it is determined that there is no abnormality in all the boards, and the self-diagnosis ends. If it is determined in step S719 that the state is abnormal, the process proceeds to step S720.

Here, steps S709, S714, S
The determination method in 719 will be described.

At the time of self-determination, 401, 402,
As shown in FIG. 11, “0” to “2” are assigned to all addresses (for 5000 pixels) of each RAM existing in the 403.
55 "are repeatedly written. Therefore, from the shading correction unit 203 in FIG.
For each of the G and B signals, data from "0" to "255" is repeatedly output as shown in FIG. R for zooming
The data written in the AM 218 is stored in the scaling RAM 21.
The data from "0" to "255" should be repeated in order from 0 in the address 8.

If any data that differs from the expected data is found, it is determined that the substrate is abnormal. For example, if the relationship of the address data in the scaling RAM 218 is as shown in FIG. 13, it can be determined that the board is normal. However, as shown in FIG. 14, if the address 3 should contain "3" as data, but if data other than "3", for example, data 200, is contained, the board is abnormal. to decide. This determination method is common to steps S709, S714, and S719 and steps S725, S732, and S737 described later.

At step S720 in FIG. 8, the CPU-AC
Set C to “0”. Next, in step S721, ADD-
IN is set to “0”. If the ADD-IN signal is "0", no signal passes through the image processing unit 213, and the masking / UC
The output signal of R section 207 is directly input to F value correction section 208.

In step S722, COLOR is set to "0", and M is output from the output of the masking / UCR unit 207.
Make the signal output. Then, Step S72
3, the CPU-ACC is set to "1", the data in the scaling RAM is read in step S724, and RA is read in step S725.
It is determined whether the data of M is normal or abnormal. If it is determined in step S719 that there is an abnormality, step S72 is performed.
In step S727, it is determined that there is an abnormality in the substrate 200, and in step S727, the abnormality of the substrate 200 is notified, and the self-diagnosis ends. However, if it is determined in step S725 that it is normal, the process proceeds to step S728.

In step S728, the CPU-AC
C is set to “0”, and then COL is set in step S716.
The OR is set to “1” so that the C signal is output from the output of the masking / UCR unit 207. Then, the CPU-ACC is set to “1” in step S730, and the CPU 301 reads the image data written in the scaling RAM 218 in step S731. Then, in a step S732, it is determined whether or not the read image data is normal. If normal, the process proceeds to step S733, and if it is determined in step S732 that it is abnormal, the process proceeds to step S726. Then, in step S726, it is determined that there is an abnormality in the substrate 200, and in step S727, the abnormality of the substrate 200 is notified, and the self-diagnosis ends.

In step S733, the CPU-AC
C is set to “0”, and then COL is set in step S734.
OR is set to “2” so that the Y signal is output from the output of the masking / UCR unit 207. Then, in a step S735, the CPU-ACC is set to “1”, and in a step S7
The image data written in the scaling RAM 218 at 36 is stored in C
PU 301 reads. Then, in a step S737, it is determined whether or not the read image data is normal. If it is normal, the process proceeds to step S738, where it is determined that the abnormality has occurred in the substrate 214, and in step S739, the substrate 2
The abnormality of 14 is notified, and the self-diagnosis ends. Step S
If it is determined in step 737 that it is abnormal, step S
Proceed to 726. Then, in step S726, the substrate 200
Is determined to be abnormal, the process proceeds to step S727, and an abnormality of the substrate 200 is notified, and the self-diagnosis ends.

As a result of the self-diagnosis as described above,
If 4,200 abnormalities are found, step S72
7. In step S739, the external device 1 of the service center of the copier is notified via the public telephone line using the I / F unit 113 that the substrates 214 and 200 are abnormal.
Contact 51. At this time, since it is specified which board has a defect, the number of boards arranged by the service person for replacement is minimized, and the replacement time is shortened.

[Second Embodiment] In a configuration similar to that of the first embodiment described above, if the self-diagnosis is set to be performed automatically when the power is turned on, there is a concern that the startup of the machine may be delayed. Is done. In such a case, it is also possible to start the self-diagnosis in response to an instruction from a service base during a time zone such as midnight when the user hardly uses the apparatus.

The procedure corresponding to such a case is shown in the flowcharts of FIGS. In FIG. 9, first,
In step S801, a communication command is checked. If it is determined in step S802 that there is an instruction to start self-diagnosis, the process proceeds to step S701, and if not, the process returns to step S801.

Steps up to step S719 are the same as those in the first embodiment. In step S803 in FIG. 9, it is determined that all the boards are normal, and in step S804, the fact that all the boards are normal is notified to the external device 515, and the self-diagnosis ends. Step S in FIG.
Steps 720 to 739 are the same as in the first embodiment described above.

In this embodiment, since the instruction to start the self-diagnosis is an instruction from the external device 515, the external device 515 is notified whether the self-diagnosis result is normal or abnormal. After completion of the self-diagnosis, step S801 is executed.
Check the communication command again.

By performing the self-diagnosis in this way, for example, if there is an abnormality, the substrate is replaced the next morning, so that the stop of the apparatus for the user can be minimized.

[0063]

As described above, according to the present invention,
The processing route of the image data is changed, the predetermined test image data is processed, the faulty part in the image processing circuit is specified from the processing result, and the fault is notified to an external device, thereby exchanging with the service sensor. It is possible to promptly notify the circuit to be performed, and to quickly respond to a failure.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an entire copying machine as a first embodiment of the present invention.

FIG. 2 is a block diagram of a control unit in the image processing unit and the I / F unit shown in FIG.

FIG. 3 is a block diagram of a control unit in the I / F unit shown in FIG.

4A, 4B, and 4C are block diagrams of the shading correction unit shown in FIG.

FIG. 5 is a configuration diagram of a Red signal block shown in FIG. 4;

FIG. 6 is an explanatory diagram of a synchronization signal.

FIG. 7 is a flowchart illustrating a self-diagnosis operation according to the first embodiment of the present invention.

FIG. 8 is a flowchart for explaining a self-diagnosis operation in the first embodiment of the present invention.

FIG. 9 is a flowchart illustrating a self-diagnosis operation according to the second embodiment of the present invention.

FIG. 10 is a flowchart illustrating a self-diagnosis operation according to the second embodiment of the present invention.

FIG. 11 is an explanatory diagram of data written in a shading correction unit shown in FIG. 1;

12 is an explanatory diagram of data output from the shading correction unit shown in FIG.

FIG. 13 is an explanatory diagram of data written in a scaling RAM shown in FIG. 2;

FIG. 14 is a scaling RAM of FIG. 2 after passing through a failure point;
FIG. 4 is an explanatory diagram of data written in a.

[Explanation of symbols]

 150 IF conversion section 151 External device 200 Main board 201 CCD 202 A / D converter section 203 Shading correction section 204 3-line connection section 205 Input masking section 206 LOG conversion section 207 Masking / UCR section 208 F value correction section 209 Zoom section 210, 212, 220 Tri-state buffer 213 Image processing unit 214 Image processing board 215 Inverter 216, 219, 221 Selector 217, 218 RAM 222 Address generation unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Nobuyuki Watanabe 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Shinobu Arimoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Kia Within Non Co., Ltd. (72) Inventor Akiko Kanno 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shingo Kitamura 3-30-2, Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Atsushi Noguchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (72) Inventor Kazuhito Ohashi 3-30-2 Shimomaruko 3-chome, Ota-ku, Tokyo Inside Canon Inc. (72 Inventor Tetsuya Nakamura 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc.

Claims (11)

[Claims] 1. An image processing apparatus having a plurality of processing routes for processing image data, a changing unit for changing the processing route, generating predetermined test image data, and supplying the test image data to the processing route. Generating means; controlling means for changing the processing route by the changing means; and flowing the test image data generated by the generating means to the plurality of processing routes; and the test image flowing from each of the processing routes. An image processing apparatus comprising: a determination unit that determines a failure location based on data; and a transmission unit that transmits a determination result of the determination unit to an external device. 2. The processing route includes a plurality of processing circuits, the processing circuits are formed on a plurality of substrates, and the determination unit determines whether or not the processing circuit has a failure for each of the substrates. The image processing apparatus according to claim 1, wherein: 3. The image processing apparatus according to claim 1, further comprising a receiving unit that receives, via a communication unit, an instruction for causing the control unit and the determination unit to function. 4. The image processing apparatus according to claim 1, wherein the generation unit reads out the contents of a memory for shading correction of the image data as the test image data. 5. The processing route is composed of a plurality of processing circuits, and the determination unit determines the plurality of processing circuits based on the contents of a scaling memory into which image data processed by the processing circuits is written. The image processing apparatus according to claim 1, wherein a failure is determined. 6. The image processing apparatus according to claim 1, wherein the processing route includes a plurality of processing circuits, and the plurality of processing circuits process color image data. 7. The processing route according to claim 1, wherein the processing route includes a plurality of processing circuits, and the plurality of processing circuits are circuits that process image data read from a reading unit that reads an image. Image processing device. 8. The processing route is constituted by a plurality of processing circuits, wherein the plurality of processing circuits are circuits that process the image data and output recording data to a recording unit that records an image. The image processing apparatus according to claim 1. 9. The image processing apparatus according to claim 1, further comprising setting means for setting the test image data to be output as it is without being processed in the processing route. 10. The processing route is for sequentially processing image data for each color component, and the control unit is configured to cause the test image data to flow through the plurality of processing routes for each color component. Item 1
An image processing apparatus according to claim 1. 11. A reading device capable of reading an image of a document, a recording device capable of recording an image, and a plurality of processing routes for processing image data read from the reading device and outputting recording data to the recording device. Changing means for changing the processing route; generating means for generating predetermined test image data and supplying the test image data to the processing route; and changing the processing route by the changing means. Control means for causing the test image data generated by the generation means to be changed and flowing through the plurality of processing routes; and determining means for determining a failure location based on the test image data flowing from each of the processing routes. And a transmission unit for transmitting a result of the determination by the determination unit to an external device.