JPH09102839A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily judge a defective block in an image processing system board without a cost. SOLUTION: An image processing part 2 is provided with a θ-correction block 21, a color correction block 22, an editing block 23, a filter and gradation block 211, a printer θ-correction block 25 and a selector 26. The selector 26 outputs correction data which is supplied from the printer γ-correction block 25 to a writing part 3 at the time of normal printing. In the meantime, input data of the γ-correction block 21 and output image data of the respective blocks 21-24 are supplied to the selector 26. When the hard-check of the image processing part 2 is executed, the selector 26 outputs image data of an instruction block by changing-over supplied respective kinds of image data. Thus, image data from the instruction block is recognized by a copy.

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 identifying a defective portion of an image processing system.

[0002]

2. Description of the Related Art Image forming apparatuses such as today's color copying machines are widely used in offices, factories, homes and the like. In such an image forming apparatus, the image processing unit
It is composed of various processing units such as correction processing, color correction processing, editing processing, filter / gradation processing, printer γ correction processing, etc. An expensive board (LSI + peripheral circuit) is used for each of these processing sections. . Therefore, when a trouble such as an abnormal image occurs in the image processing unit, it is necessary to identify on which board the trouble has occurred and at which part of the board to repair or replace the defective board. . In such a case, conventionally, a serviceman has brought back one or more boards that are considered defective.
Then, when there are a plurality of boards, one board which seems to be defective is attached to a normal machine one by one, and it is confirmed whether the board operates normally or a normal copy is made, and the defective board is specified. Furthermore, in order to identify the defective part of the defective board,
It is also practiced to connect an oscilloscope or logic analyzer to an appropriate place, operate a machine, and observe a waveform to inspect it. Furthermore, JP-A-3-2972
Japanese Patent Laid-Open No. 62-62 proposes a special inspection device that can inspect up to a board unit.

[0003]

As described above, various inspection methods have been conventionally adopted for the trouble of the image processing section, but there are the following problems. In other words, the serviceman takes back boards that seem to be defective, attaches one defective board to a normal machine one by one, and confirms whether it operates normally or makes a normal copy. The board had to be judged, which was a troublesome task. In addition, this method can only determine the quality of each board. Further, when the image processing apparatus is intended for full color, the copy cost for inspection is high and uneconomical.

On the other hand, in the inspection using an oscilloscope or a logic analyzer, it is necessary to make a judgment by observing a waveform, and there are many observation points, so that there is a problem that it is very difficult to judge the quality. Further, in the method of preparing a special inspection device disclosed in Japanese Patent Laid-Open No. 3-297262, it is necessary to prepare the inspection device in advance, and it is only possible to make a pass / fail judgment for each board. In other words, even if the inspection device was manufactured with great effort, it was not possible to specify which part of the board by the quality judgment up to the board unit.

Therefore, the present invention has been made in order to solve the above-mentioned problems of the prior art, and which block (LS) in the board of the image processing system can be performed without increasing the cost.
An object of the present invention is to provide an image forming apparatus having a function of easily determining whether I) is defective.

[0006]

According to a first aspect of the present invention, an image processing unit configured by an image reading unit for reading an original image and a plurality of processing blocks, and processing the image data read by the image reading unit. The image forming apparatus includes: a writing unit that writes the image data processed by the image processing unit; and an output unit that outputs the output data of each processing block of the image processing unit to the writing unit. To achieve the above object. According to the second aspect of the present invention, an image reading unit that reads an original image, an image processing unit that includes a plurality of processing blocks, processes the image data read by the image reading unit, and processes the image processing unit. Writing unit for writing the processed image data, a display unit for displaying the image data processed by the image processing unit, and an output unit for outputting the output data of each processing block of the image processing unit to the display unit. And (3) are provided in the image forming apparatus to achieve the above object.

According to the third aspect of the invention, the image reading section for reading the original image and a plurality of processing blocks are provided.
An image processing unit that processes the image data read by the image reading unit, a writing unit that writes the image data processed by the image processing unit, and an area that generates an area signal for switching the processing for each area. The image forming apparatus is provided with a signal generating unit and a pattern generator for each processing block of the image processing unit, and an output unit for outputting the pattern of each processing block to the writing unit for each area. To achieve. According to a fourth aspect of the present invention, an image reading unit that reads an original image, an image processing unit that includes a plurality of processing blocks, processes the image data read by the image reading unit, and performs processing by the image processing unit. A writing unit for writing the processed image data, a display unit for displaying the image data processed by the image processing unit, an area signal generation unit for generating an area signal for switching the processing for each area, and the image. The above-described object is achieved by providing the image forming apparatus with a pattern generator for each processing block of the processing unit and an output unit for outputting the pattern of each processing block to the display unit for each area.

According to a fifth aspect of the present invention, the image reading section for reading the original image and a plurality of processing blocks are provided.
An image processing unit for processing the image data read by the image reading unit, a writing unit for writing the image data processed by the image processing unit, and a display for displaying the image data processed by the image processing unit. Means, a detachable area signal generating means for generating an area signal for switching processing for each area, and a pattern generator for each processing block of the image processing unit, and a pattern of each processing block for each area. The above-described object is achieved by providing the image forming apparatus with an output unit that outputs to the writing unit. According to a sixth aspect of the present invention, an image reading unit that reads an original image, an image processing unit that includes a plurality of processing blocks, processes the image data read by the image reading unit, and the image processing unit processes the image data. The image forming apparatus is provided with a writing unit for writing the generated image data, a pattern generator and a pattern matching function for each processing block of the image processing unit, and an output unit for outputting the result of the pattern matching. To achieve the above purpose.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the image forming apparatus of the present invention will be described in detail below with reference to FIGS. First, an outline of a color copying machine as an image forming apparatus of this embodiment will be described. An original image is read by a color image reading device, and its color information, for example, Red (R), Green (G), Blue (B) is read.
Is converted into an electric image signal. This converted RGB
By subjecting the signal to color correction processing or the like in the image processing unit, Bl
ack (Bk), Cyan (C), Magenta
(M), Yellow (Y). This is output to a color image recording device to obtain a color copy. Image data (for example, Bk) of one color can be obtained by one reading operation (simultaneous R, G, B) of the color image reading device. Therefore, by repeating the reading operation four times, the reading is sequentially performed.
Image data of colors (Bk, C, M, Y) is visualized by a color image storage device, and these are superposed to form a full-color image of four colors.

FIG. 1 is a block diagram showing the structure of the image forming apparatus. As shown in FIG. 1, the image forming apparatus includes an image reading unit 1, an image processing unit 2, and a writing unit 3. The image reading unit 1 includes a color scanner (not shown), and outputs the document image data B, G, R read by the color scanner to the image processing unit 2 at the same time. The manuscript image data B, G, and R are subjected to various kinds of processing in the image processing section 2 and then output to the writing section 3.

The image processing unit 2 has a plurality of processing blocks, a γ correction block 21, a color correction block 22, an editing block 23, a filter / gradation block 24, and a printer γ.
The correction block 25 and the selector 26 are provided.
The γ correction block 21 is adapted to convert the images B, G, R (for example, linear reflectance) output from the image reading unit 1 into density linear R ′, G ′, B ′, and the converted data. Are supplied to the color correction block 22.

The color correction block 22 is adapted to perform color correction / color conversion processing. That is, the image reading unit 1
The document image data read by is B, G, R,
Since a copy is printed with each of Bk, C, M, and Y toners, inks, or ink ribbons, image data R ', G', B'to image data B
It is designed to be converted into k, C, M and Y. here,
The coefficients r, g, b and the constant d are automatically switched depending on the hue division plane of the R, G, B data. Further, when converting an arbitrary color into a desired color, the coefficients and constants are switched to predetermined values.

In the image editing block 23, the image data Bk, C, M and Y supplied from the color correction block 22.
For (1), various editing processing such as scaling is performed according to the editing instruction, and the filter / gradation processing block 24 of the next stage is executed.
To be supplied. The filter / gradation block 24 performs through for character processing (outputs the input data as it is) and performs known gradation processing (gradation expression in block units) for photo processing and outputs the result to the printer γ correction block 25. ing.

In the printer .gamma. Correction block 25, the low density portion is white and the middle to high density portion is dark so that the character area can be clearly seen. The photographic area is corrected so that it looks smooth from low density areas to middle and high density areas. The printer γ correction block 25 supplies the corrected data to the selector 26.

The selector 26 outputs the correction data supplied from the printer γ correction block 25 to the writing section 3 in the case of normal printing processing. The selector 26 receives input data (R, G, and R) from the γ correction block 21 as well as from the printer γ correction block 25.
B) and the image data (R ', G', B '), BkCMY (1), BkCM output from each block 21-24.
Y (2) and BkCMY (3) are supplied. When performing a hard check of the image processing unit 2, each image data (R, G, B), (R ', G',
B '), BkCMY (1), BkCMY (2), BkC
By switching MY (3) by the selector 26, the image data of the instruction block is output to the writing unit 3. As a result, the image data output from the instruction block can be confirmed by copying.

It should be noted that the selector 26 can be used for one copy process.
It is also possible to form the output screen data of all the blocks into one copy by automatically switching. Here, the switching can be easily generated by the sub-scanning synchronization signal (color scanner moving direction) and the main-scanning synchronization signal (direction vertical to the color scanner moving direction), and a description thereof will be omitted.

Next, a second embodiment will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be appropriately omitted. As shown in FIG. 3, in the second embodiment, the selector 5 connectable to the image processing unit 2 is provided separately from the image processing unit 2.
It has. The selector 5 includes a γ correction block 2
1 input data (R, G, B) and each block 21-2
4 output image data (R ', G', B '), B
kCMY (1), BkCMY (2), BkCMY (3)
Are being supplied. Of the supplied image data, the selector 5 outputs the image data of the instruction block to the writing unit 3 via the selector 26 in the image processing unit 2.

That is, the selector 5 is connected to the image processing unit 2 only when the hard check of the image processing unit 2 is performed. As a result, the image data output from each block is input to the selector 5, the selector 5 switches to output the image data of the instruction block, the output data is input again to the image processing unit 2, and the selector 26 instructs. By outputting the image data of the block to the writing unit 3,
The image data output from the instruction block can be confirmed by copying. Similarly, the output image data of all blocks can be formed into one copy by automatically switching the selector 5 in one copy process.

Next, a third embodiment will be described with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be appropriately omitted. In the third embodiment, an image can be edited for each area, and the image forming apparatus includes an image display device for this editing. The image forming apparatus further includes a display editor 4 as shown in FIG.

In the image processing unit 2, the output data BkCMY from the printer γ correction block 25 is sent to the writing unit 3.
(4) is supplied directly. Further, the image processing unit 2 further includes a thinning processing unit 27. Then, in the selector 26 of the image processing unit 2, as in the first embodiment, the input data (R, G, B) of the γ correction block is input.
And output data (R ',
G ', B'), BkCMY (1), BkCMY (2),
BkCMY (3) and BkCMY (4) are supplied, and the image data of the instruction block is supplied to the thinning processing unit 27. The thinning-out processing unit 27 thins out the supplied image data and then supplies it to the display editor 4.

In the third embodiment, the γ correction block 21, the color correction block 22, the editing block 23, the filter / gradation block 24, the printer γ correction block 25, and the writing in the image reading unit 1 during the copy operation are performed. The process of the unit 3 is the same as that described with reference to FIG.

The operation at the time of area editing in the third embodiment will be described. First, the image reading unit 1 reads a document image. The read original image is corrected in the γ correction block 21 according to the display of the display editor 4, thinned out in the thinning block 27 through the selector 26, output to the display editor 4, and the result is displayed. . The reason for thinning out image data is as follows. That is, the resolution of the copying machine is high (for example, 4
00 dpi), if an attempt is made to hold all the data as it is, an enormous memory is required, resulting in high cost.
Therefore, in order to reduce the memory, it is thinned out to about 100 dpi, output to the display editor 4, stored in the memory in the display editor 4, and the stored content is displayed.

Next, the area is designated by touching the area to be changed on the screen with coordinate indicating means (not shown) such as a touch pen (the touch panel is on the screen). Then, specify the content you want to change (for example,
The color is converted to red by the color conversion process). The above series of operations is displayed on the screen as a menu or the like. The instruction operation is completed,
When copy start switching is pressed, the series of operation contents are notified to the image processing unit 2, and parameters are set according to the operation contents. After the parameter setting is completed, image reading by the color scanner of the image reading unit 1 is started, and a series of copying operations are started. Here, although the area signal is not shown in the figure (for example, when it is desired to enable eight types of area switching, three signal lines can be identified, and therefore three signal lines are input to each block. ), Is input from the area control block to each block, and automatically switches for each designated area. Each block switches the parameter by looking at this area signal and performs desired processing.

On the other hand, when performing a hard check of the image processing unit 2, the image data (R, G, B) input to the γ correction block 21 and the image data (R ', R', output from each of the blocks 21 to 25). G ', B'), BkCMY (1),
BkCMY (2), BkCMY (3), BkCMY
(4) is switched by the selector 26, the image data of the instruction block is thinned out by the thinning block 27, then output to the display editor 4, and the result is displayed by the display editor 4. However, by automatically switching the selector 26 by one reading operation,
The output image data of all blocks can be displayed on one screen. Here, the switching can be easily generated by the sub-scanning synchronizing signal and the main scanning synchronizing signal, or an area signal may be used.

Next, a fourth embodiment will be described with reference to FIG. In this embodiment, the first and third
The same parts as those of the embodiment will be designated by the same reference numerals, and the description thereof will be appropriately omitted. As shown in FIG. 5, in the fourth embodiment, a selector 6 and a thinning processing unit 7 are provided separately from the image processing unit 2. The selector 6 is connectable to the image processing unit 2, and the thinning-out processing unit 7 is connectable to both the selector 6 and the image processing unit 2. Similar to the selector 26 of the third embodiment, the selector 6 has input data (R, G, B) of the γ correction block 21 and image data (R ′, G ′) output from each of the blocks 21 to 24. , B '), BkCMY
(1), BkCMY (2), BkCMY (3), BkC
MY (4) is supplied.

In the image forming apparatus of the fourth embodiment, the image processing unit 2 and the thinning processing unit 7 are normally connected without the selector 6, and the output data of the γ correction block 21 is directly connected to the thinning processing unit 7. . The image data output from each block is input to the selector 6 by inserting the selector 6 between the image processing unit 2 and the thinning processing unit 7 only when the hard check of the image processing unit 2 is performed. In step 6, the image data of the instruction block is switched to be output, and in the thinning block 7, the thinning process is performed and the result is output to the display editor 4, and the result is displayed. Similarly, the output image data of all blocks is set to 1 by automatically switching the selector 6 by one reading operation.
It can also be displayed on the screen.

Next, a fifth embodiment will be described with reference to FIGS. 6 and 7. Also in this embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be appropriately omitted. FIG. 6 is a block diagram showing the configuration of the fifth embodiment. As shown in FIG. 6, the image processing unit 2 includes an area signal generation block 28. The area signal generation block 28 has a bitmap memory for the maximum size of the original (or paper), and when area processing is not performed, "0" is written in the bitmap memory. There is.
Further, unlike the first embodiment, each of the blocks 21 to 25 of the image processing unit 2 has a built-in test pattern. As the test pattern, for example, a gradation pattern or a lattice pattern is built in.

In the fifth embodiment, during a normal copy operation (when the area processing in this embodiment is not performed)
The processes of the image reading unit 1, the γ correction block 21, the color correction block 22, the editing block 23, the filter / gradation block 24, the printer γ correction block 25, and the writing unit 3 are substantially the same as those in the first embodiment. Is. In the area signal generation block 28, "0" is written in the bitmap memory when the area processing is not performed. Therefore, the data written in the bitmap memory during the copy operation, that is, "0" is written in each of the blocks 21 to 25. Is output. Also,
When the area is designated by the coordinate designation, the area number is assigned to the designated area (here, 4 bits, that is, 0 to 15 can be assigned) and written in the bitmap memory. As a result, the data written in the bit map memory of the area signal generation block 28 during the copy operation is output to each block in synchronization with the image data input to each block.

Next, a case where a hard check of the image processing unit 2 in the fifth embodiment is performed will be described. First, the area number is written in the bit map memory of the area signal generation block 28. That is, as shown in FIG. 7, the area is divided into six areas, and area numbers are assigned to each area (0
~ 5).

The respective areas are as follows. In the area 0, the image of the mode set to be popular on the operation panel is output. That is, the parameters are set in each block so that the designated image can be obtained. The built-in test pattern of the γ correction block 21 is output to the area 1. That is, the γ correction block 21 outputs the built-in pattern,
In the other blocks, the parameters are set so that the same processing as in area 0 is performed. A built-in test pattern of the color correction block 22 is output to the area 2. That is, the hood correction block 22 outputs the built-in pattern, and the parameters are set so that the other blocks perform the same processing as in the area 0. The built-in test pattern of the edit block 23 is output to the area 3. That is, the parameters are set so that the edit block 23 outputs the built-in pattern and the other blocks perform the same processing as in the area 0. A built-in test pattern of the filter / gradation block 24 is output to the area 4. That is, the filter / gradation block 24 outputs the built-in pattern, and the parameters are set so that the other blocks perform the same processing as in the area 0. Area 5 has printer γ block 2
5 built-in test patterns are output. That is, the parameters are set so that the printer γ block 25 outputs the built-in pattern, and the other blocks perform the same processing as in area 0.

When a copy is instructed, the above data written in the bit map memory of the area signal generation block 28 is output to each block in synchronization with the read image, so that the parameters are switched for each area and one sheet of paper is used. The read image and the test pattern result of each block of the image processing unit 2 are copied for each area shown in FIG.

Next, a sixth embodiment will be described with reference to FIG. In the sixth embodiment, an image forming apparatus equipped with an image display device for area editing will be described. The same parts as those in the fifth embodiment are designated by the same reference numerals, and the description thereof will be appropriately omitted. The image processing unit 2 in the sixth embodiment further includes a thinning processing unit 27 in addition to the fifth embodiment,
The thinning processing unit 27 includes a printer γ correction block 2
The image data BrCMY (4) after being processed in 5 is supplied. The thinning processing unit 27 is connected to the display editor 4, and its function and processing are the same as those in the third embodiment.

During the copy operation, the processing of the pattern and area signal generation block 28 incorporated in each block of the image processing unit 2 is the same as that of the fifth embodiment. When editing the area, first, the original image is read. That is, the document image read from the image reading unit 1 is converted into the γ correction block 2
1, the color correction block 22, the editing block 23, the filter / gradation block 24, and the printer γ correction block 25 output to the display editor 4 and display the result. Here, when there is a hard check instruction of the image processing unit 2, the parameters of the blocks 21 to 24 of the image processing unit 2 are set and the area number of the bit map memory of the area signal generation block 28 is written. This is the same as described in the fifth embodiment.

Then, the original image is read. At this time, the data written in the bitmap memory is output to each block in synchronization with the read image.
Parameters are switched for each area, and thinning block 2
The data is thinned out at 7 and output to the display editor 4, and the result is displayed. Therefore, as shown in FIG. 7, the read image and the test pattern result of each block of the image processing unit 2 are displayed for each area.

Next, a seventh embodiment will be described with reference to FIG. The seventh embodiment is an embodiment in the case where the area signal generation unit can be connected to the image processing unit 2 in an image forming apparatus without area editing. The image processing unit 2
The area signal generation block 28 is configured to be connectable, and the area signal from the connected area signal generation block 28 is input to each of the blocks 21 to 25.

Image reading unit 1 during copy operation, γ correction block 21, color correction block 22, editing block 23, filter / gradation block 24, printer γ correction block 2
5. The processing of the writing unit 3 is the same as that described in the first embodiment. When performing a hard check of the image processing unit 2, after the area signal generation unit 8 is connected to the image processing unit 2, the parameter setting of each block 21 to 25 of the image processing unit 2 and the bitmap of the area signal generation unit 8 are performed. Write the memory area number. This is the same as described in the fifth embodiment. The area number may be written in advance. Then, when a copy instruction is given, the above-mentioned data written in the bitmap memory is output to each block in synchronization with the read image, so the parameters are switched for each area and read on one sheet for each area shown in FIG. The image and the test pattern result of each block of the image processing unit 2 are copied.

Next, an eighth embodiment will be described with reference to FIG. Each block of the image processing unit 2 (21 to 25)
Has a built-in test pattern and pattern matching function. Here, the test pattern is a gradation pattern (or a grid pattern). As the pattern matching method, the added value of the test pattern data output from the previous stage (this is calculated in advance from the test pattern data for each block) and the added value of the test pattern data input to the subsequent stage (this is (Detected by the block in the subsequent stage), and if they are equal, it is determined as a good product, and if they are different, it is determined as a defective product.

Now, the image reading section 1 in the copying operation, the γ correction block 21, the color correction block 22, and the editing block 2
3, the filter / gradation block 24, the printer γ correction block 25, and the writing unit 3 are the same as those described with reference to FIG. When performing a hard check of the image processing unit 2,
A test pattern is output for each block of the image processing unit 2, the blocks in the subsequent stage of each block add the test patterns, and the result is sent to the control block 9 which controls the image processing unit 2. The control block 9 compares the addition value sent from each block with the addition value stored in advance, and if all are equal, it is a good product, and if there is an inequality, a defective product and a defective block (unequal pre-stage and post-stage blocks). To report. The notification method is displayed on the display unit (not shown) of the operation panel.

In each of the embodiments described above, a gradation pattern (or a grid pattern) is used as a test pattern.
However, any test pattern may be used.

[0040]

According to the image forming apparatus of the first aspect, since the image data output from each processing block of the image processing unit can be directly copied and output, the determination is not limited to the non-defective product and the defective product for each image processing board. Instead, it is possible to judge whether each block is a good product or a defective product. According to the image forming apparatus of the second aspect, in the image forming apparatus including the display device, the image data output from each book in the image processing board is displayed on the display device to display the image data in units of the image processing board. Not only the determination of good products and defective products, but also the determination of good products and defective products in block units can be performed, and there is no need to make unnecessary copies. According to the image forming apparatus of the third aspect, the test pattern is built in each block in the image processing board so that the area can be switched. Therefore, the selector required in the first and second aspects is unnecessary. Moreover, since the test pattern output results of all blocks can be obtained in one copy, it is not limited to the judgment of good products and defective products in image processing board units, but also the judgment of good products and defective products in block units can be judged at a glance. it can. According to the image forming apparatus of the fourth aspect, in the image forming apparatus including the display device, the test pattern is built in each block in the image processing board so that the area can be switched. Since the selectors required in claims 1 and 2 are not required and the test pattern output results of all blocks can be displayed at one time,
It is not limited to the judgment of good products and defective products in image processing board units,
It is possible to judge at a glance whether each block is good or bad,
Furthermore, there is no need to make useless copies. According to the image forming apparatus of claim 5, if the test pattern is built in each block in the image processing board and the area signal can be input to each block, only the area switching board is mounted. Since the test pattern output results of all blocks can be obtained in one copy, it is possible to judge at a glance whether a good product or a defective product is a block unit, not just a good product and a defective product of an image processing board. According to the image forming apparatus of the sixth aspect, if the test pattern and the pattern matching function are built in each block in the image processing board, the pattern matching results match and do not match, and the image processing board is regarded as a good product. It is not only possible to judge defective products, but it is also possible to automatically judge good products and defective products in block units.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an image forming apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing conversion formulas for obtaining image data Bk, C, M, and Y from image data R ′, G ′, and B ′ in the image forming apparatus.

FIG. 3 is a block diagram showing a configuration of an image forming apparatus according to the second embodiment.

FIG. 4 is a block diagram showing a configuration of an image forming apparatus according to the third embodiment.

FIG. 5 is a block diagram showing the configuration of an image forming apparatus according to the fourth embodiment.

FIG. 6 is a block diagram showing a configuration of an image forming apparatus according to the fifth embodiment.

FIG. 7 is an explanatory diagram showing area numbers of sheets divided into six in the fifth embodiment.

FIG. 8 is a block diagram showing a configuration of an image forming apparatus according to the sixth embodiment.

FIG. 9 is a block diagram showing a configuration of an image forming apparatus according to the seventh embodiment.

FIG. 10 is a block diagram showing a configuration of an image forming apparatus according to the eighth embodiment.

FIG. 3

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image reading unit 2 Image processing unit 21 γ correction block 22 Color correction block 23 Editing block 24 Filter / gradation block 25 Printer γ correction block 26 Selector 27 Decimation processing unit 28 Area signal generation unit 3 Writing unit 4 Display editor 5 , 6 Selector 7 Decimation processor 8 Area signal generator 9 Control block

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[Procedure amendment]

[Submission date] February 9, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an image forming apparatus according to a first embodiment of the present invention.

FIG. 2 is the same as the above, in the image forming apparatus, image data R
It is explanatory drawing showing the conversion formula for obtaining image data Bk, C, M, and Y from ', G', and B '.

FIG. 3 is a block diagram showing a configuration of an image forming apparatus according to the second embodiment.

FIG. 4 is a block diagram showing a configuration of an image forming apparatus according to the third embodiment.

FIG. 5 is a block diagram showing the configuration of an image forming apparatus according to the fourth embodiment.

FIG. 6 is a block diagram showing a configuration of an image forming apparatus according to the fifth embodiment.

FIG. 7 is an explanatory diagram showing area numbers of sheets divided into six in the fifth embodiment.

FIG. 8 is a block diagram showing a configuration of an image forming apparatus according to the sixth embodiment.

FIG. 9 is a block diagram showing a configuration of an image forming apparatus according to the seventh embodiment.

FIG. 10 is a block diagram showing a configuration of an image forming apparatus according to the eighth embodiment.

[Description of Reference Signs] 1 image reading unit 2 image processing unit 21 γ correction block 22 color correction block 23 editing block 24 filter / gradation block 25 printer γ correction block 26 selector 27 thinning processing unit 28 area signal generation unit 3 writing unit 4 Display editor 5 and 6 Selector 7 Decimation processor 8 Area signal generator 9 Control block

Claims (6)

[Claims] 1. An image reading unit for reading an original image, an image processing unit including a plurality of processing blocks, for processing image data read by the image reading unit, and image data processed by the image processing unit. An image forming apparatus, comprising: a writing unit that writes the data; and an output unit that outputs output data of each processing block of the image processing unit to the writing unit. 2. An image reading unit for reading a document image, an image processing unit including a plurality of processing blocks, for processing image data read by the image reading unit, and image data processed by the image processing unit. And a display unit for displaying the image data processed by the image processing unit, and an output unit for outputting the output data of each processing block of the image processing unit to the display unit. An image forming apparatus comprising: 3. An image reading unit for reading a document image, an image processing unit including a plurality of processing blocks, which processes image data read by the image reading unit, and image data processed by the image processing unit. And a pattern generator for each processing block of the image processing unit, and an area signal generating unit for generating an area signal for switching processing for each area. An image forming apparatus comprising: an output unit that outputs a pattern to a writing unit. 4. An image reading unit for reading a document image, an image processing unit including a plurality of processing blocks, for processing image data read by the image reading unit, and image data processed by the image processing unit. A writing unit for writing the data, a display unit for displaying the image data processed by the image processing unit, an area signal generation unit for generating an area signal for switching the processing for each area, and each of the image processing units. An image forming apparatus comprising: a pattern generator for each processing block; and an output unit for outputting a pattern of each processing block to a display unit for each area. 5. An image reading unit for reading an original image, an image processing unit including a plurality of processing blocks, for processing image data read by the image reading unit, and image data processed by the image processing unit. A writing unit for writing the data, a display unit for displaying the image data processed by the image processing unit, a detachable area signal generation unit for generating an area signal for switching the processing for each area, and the image processing An image forming apparatus, comprising: a pattern generator for each processing block of each unit; and output means for outputting the pattern of each processing block to a writing unit for each area. 6. An image reading unit for reading an original image, an image processing unit including a plurality of processing blocks, for processing image data read by the image reading unit, and image data processed by the image processing unit. An image forming apparatus comprising: a writing unit for writing a pattern, a pattern generator and a pattern matching function for each processing block of the image processing unit, and an output unit for outputting a pattern matching result. .