JP2000201275A - Picture processor, its control method and picture processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picture processor which can control the picture quality of a printed picture so that it appears equal to an original picture and to provide its control method and a picture processing system. SOLUTION: Original picture data in a print memory 71 are printed/outputted on recording paper. The recording paper is read by a scanner and the obtained data are stored in a scanner memory 72 as test picture data. A comparison operation part 73 stores differential data between original picture data and test picture data in a differential memory 74. A correction operation part 75 stores a correction memory 76 with correction data obtained by correcting original picture data on the basis of differential data. Thus, picture quality similar to original picture data can be obtained in the printed picture by printing and outputting correction data again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, a control method therefor, and an image processing system. For example, the present invention relates to an image processing apparatus having image recording means and image reading means, a control method therefor, and an image processing system. .

[0002]

2. Description of the Related Art Generally, in an image processing system in which an image created by a monitor display in an information processing device such as a computer is output to a printing device such as a color printer and printed, a print image is particularly a color image which is expected by a user. Often far apart in taste. That is, the image quality of the printed image differs from the original image desired by the user.

In such a case, the user changes settings of a printer driver for controlling the output of the printer on the computer, for example, parameters such as saturation, density, and resolution so that the print image approaches the display image (original image). To make corrections. Then, by printing and outputting again by the printer, a print image of an appropriate color could be obtained.

[0004]

However, the setting of the printer driver in the conventional image processing system is manually performed by the user. Therefore, the user needs a technique based on intuition and experience when setting the printer driver, and cannot easily pursue the image quality of the print image. Therefore, it takes enormous amount of time and effort to obtain a desired image quality substantially equal to the original image in the printed image.

[0005] In addition, when even one of the plurality of recording agents is insufficient during printing, particularly in a color printer, only printed matter having insufficient image quality is obtained. In such a case, it is naturally necessary to replenish the missing recording agent, but in order to obtain an appropriate printed matter, printing is performed again on a new recording sheet after the replenishment of the recording agent, and the defective image is printed on the recording sheet. Was forced to revolt.

The present invention has been made to solve the above-described problem, and provides an image processing apparatus, a control method thereof, and an image processing system capable of controlling a print image to have the same image quality as an original image. The purpose is to:

It is another object of the present invention to provide an image processing apparatus, a control method thereof, and an image processing system that enable appropriate printing on recording paper on which defective printing has been performed.

[0008]

As one means for achieving the above object, the image processing apparatus of the present invention has the following arrangement.

That is, recording means for recording an image on a recording medium, reading means for reading the image on the recording medium, first holding means for holding image data recorded by the recording means, and reading means A second holding unit for holding the image data read by the method, and extraction for extracting difference information between the image data held in the first holding unit and the image data held in the second holding unit. Means, correction means for correcting image data held in the first holding means based on the extracted difference information to create correction data, and holding means in the first holding means by the recording means After reading the recording medium on which the image data is recorded by the reading means, and controlling the correction means to record the correction data created by the correction means on the recording medium by the recording means. And having a, the.

[0010] Further, recording means for recording an image on a recording medium, reading means for reading the image on the recording medium, first holding means for holding image data recorded by the recording means, and reading means A second holding unit for holding the image data read by the method, and extraction for extracting difference information between the image data held in the first holding unit and the image data held in the second holding unit. Means for reading, by the reading means, a recording medium on which the image data held in the first holding means is recorded by the recording means, and then storing the image data based on the difference information extracted by the extracting means. And control means for controlling recording on the recording medium according to (1).

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described below in detail.

<First Embodiment> FIG. 1 is an external perspective view of a personal computer (hereinafter, referred to as a personal computer) which is an image processing apparatus of the present embodiment. The personal computer according to the present embodiment is a notebook personal computer having both a scanner function and a printer function.
However, the present invention is not limited to the configuration of the personal computer shown in FIG.

In FIG. 1, a personal computer 1 includes a personal computer body 10 for performing image processing according to the present embodiment, a monitor 11 as an image display device, a keyboard 12 as an input device,
A scanner 13 as an image reading device and a printer 14 as an image recording device are provided. Although not shown in FIG. 1,
It is also possible to provide the personal computer 1 with communication means for performing data communication with other devices based on a predetermined protocol.

In the personal computer 1, the recording paper 15 is inserted from the lower front of the keyboard 12 and discharged from the rear of the monitor 11.

The scanner 13 of the present embodiment is, for example,
The printer 14 is a color scanner that optically reads a document image in RGB.
This is an inkjet printer that records an image using color inks. The scanner 13 and the printer 14 have the same housing, and by using the color scanner head and the recording head interchangeably, the functions of both can be exhibited. For example, the image can be read in RGB and read by YMC.
And can be printed out on the recording paper 15.

FIG. 2 is a block diagram showing a functional configuration of the personal computer 1. The personal computer 10 includes application software 101 such as a word processor, a spreadsheet, and an Internet browser, and an OS (Operating).
System 102), a scanner driver 103 for processing image data input by the scanner 13, and various drawing commands (image drawing command, text drawing command, graphics drawing command) indicating output images issued to the OS 102 by the application 101. A printer driver 104 that processes and creates print data; and a video driver 105 that processes various drawing commands issued by the application 101 and displays them on the monitor 11.
Has as software.

The personal computer main body 10 includes a central processing unit CPU 108, a hard disk HD 107, a random access memory RAM 109, a read only memory ROM as various hardware on which the software can operate.
110 and the like.

As an example of the personal computer main body 10 shown in FIG. 2, for example, PC-A manufactured by IBM, which is widely spread, is used.
Microsoft compatible with T compatible personal computer
It is conceivable that Windows 95 of the company is used as an OS, a desired application capable of printing is installed, and the monitor 11 is connected to the scanner 13 and the printer 14.

In the personal computer 10, the image data read by the scanner 13 is stored in the scanner memory on the RAM 109 secured by the scanner driver 103. Then, the read image data is displayed on the monitor 11.
Can be displayed.

In the personal computer 10, an application 101 is further executed based on a display image displayed on the monitor 11.
, Text data classified as text such as characters,
Output image data is created using graphics data classified as graphics such as figures, image image data classified as natural images, and the like. When printing out the output image data, the application 1
01 issues a print output request to the OS 102, and issues a graphics drawing instruction group indicating an output image composed of a graphics rendering instruction to the graphics data portion and an image rendering instruction to the OS 102 to the OS 102. OS10
2 receives an output request from the application and issues a rendering command group to the printer driver 104 corresponding to the output printer.

The printer driver 104 processes a print request and a drawing command group input from the OS 102, creates print data printable by the printer 14, and transfers the print data to the printer 14. Note that print data is created in the printer driver 104 by securing a print memory in the RAM 109 and creating print data in the memory. When the printer 14 is a raster printer, the printer driver 104 sequentially performs image correction processing on a drawing command from the OS, and rasterizes the drawing command sequentially into a 24-bit RGB page memory.
The contents of the B24 bit page memory are converted into a data format printable by the printer 14, for example, CMYK data, and transferred to the printer.

The present embodiment is characterized in that one of the applications 101 has a print image correction function. FIG. 3 is a block diagram schematically showing a configuration for realizing the function. In FIG.
A print memory 72 stores image data controlled by the printer driver 104 and printed out by the printer 14, and a scanner memory 72 stores image data read by the scanner 13 and controlled by the scanner driver 103. 73 is a comparison operation unit, 7
Reference numeral 4 denotes a difference memory. The comparison operation unit 73 calculates a difference between the image data held in the print memory 71 and the image data held in the scanner memory 72, and outputs a difference memory 74.
To be stored. Reference numeral 75 denotes a correction operation unit, and a difference memory 74
The content of the print memory 71 is corrected based on the content of
The correction result is stored in the correction memory 76. Note that the print memory 71, the scanner memory 72, the difference memory 74, and the correction memory 76 may be provided independently of each other, or may be appropriately secured on the RAM 109, for example.

FIG. 4 is a diagram schematically showing the state of the print image correction processing in this embodiment. In FIG. 4, 2
Reference numerals 1, 22, and 23 denote image data visually based on the density. Reference numeral 21 denotes original image data held in the print memory 71. The original image data 21 is transmitted to the personal computer 1 by, for example, the monitor 1.
1 is displayed. The scanner 22 reads the printed matter obtained by printing the original image data 21 by the printer 14 with the scanner 13 before performing the print image correction processing in the present embodiment, thereby converting the test image data stored in the scanner memory 72. Show.

As described above, the comparison operation unit 73 of the present embodiment extracts the difference between the original image data 21 held in the print memory 71 and the test image data 22 held in the scanner memory 72, It is stored in the difference memory 74. Reference numeral 23 shown in FIG. 4 denotes difference data which is the content of the difference memory 74.

In the present embodiment, corrected image data is created by performing correction based on the difference data 23 to the original image data 21 by the correction calculation unit 75,
By printing and outputting the corrected image data in the printer 14, an image obtained as a printing result on the recording paper 15 can be made closer to the original image data 21.

For example, the printer 14 is a color printer of a type in which each color ink of magenta (M), cyan (C), and yellow (Y) is mixed and printed. It is assumed that there is a characteristic that C is also printed lightly and C is printed darkly. In this case, based on the original image data 21 and the test image data 22, difference data 23 indicating a difference between a light M and a dark C is obtained. Therefore, a corrected image is created by adding the difference data 23 to the original image data 21 and reprinted, whereby a print image close to the original image data 21 can be obtained. The difference data 23 for the original image data 21
Is corrected by adding the light M data as a plus portion and adding the dark C data as a minus portion, that is, deleting it.

FIG. 5 is a flowchart showing a print image correction process in this embodiment. First, step S31
, The original image data 21 stored in the print memory 71 is printed by the printer 14 to obtain a test print.
In step S32, the user determines whether to correct the print image with reference to the test print. The determination result is input by the user as a print image correction instruction from the keyboard 12, for example. For example, if the image quality of the test print is sufficiently close to the original image data 21, there is no need to perform correction, and the process is terminated.

On the other hand, if there is a print image correction instruction, the process proceeds to step S33, and the test image data 22 stored in the scanner memory 72 is read by the user by causing the scanner 13 to read the printed test print. In step S34, the original image data 21 in the print memory 71 and the test image data 2 in the scanner memory 72
2 is extracted and the difference data 2 is stored in the difference memory 74.
3 is stored. In step S35, it is determined whether correction is necessary based on the extraction result, that is, the difference data 23. Here, if there is no difference, or if the difference is within the predetermined range, it is determined that there is no need for correction, and the process ends.

If correction is necessary in step S35, the flow advances to step S36, in which the correction calculation unit 75 creates corrected image data by adding the difference data 23 to the original image data 21 in the print memory 71, and generates the corrected image data. To be stored. If the user gives an instruction to print the corrected image data in step S37, the process proceeds to step S37.
At 38, the corrected image data in the correction memory 76 is printed out from the printer 14.

The printed matter of the corrected image data obtained in this manner has substantially the same image quality as when the original image data 21 is ideally printed.

The printer driver 104 according to the present embodiment
In a so-called printer, the print characteristics of the printer 14 are grasped by holding and analyzing a plurality of difference data 23 or a plurality of correction data obtained by repeatedly performing the print image correction process shown in FIG. It is possible to learn characteristics. Therefore, if the original image data is corrected based on the printer characteristics obtained as a result of the sufficient analysis, it is not necessary to always perform the print image correction process shown in the flowchart of FIG. For example, an appropriate set value of the printer driver 104 may be calculated based on the plurality of difference data 23, and the set value may be stored.

As described above, according to the present embodiment,
By reading a test printed matter that has been printed out of the original image data on a trial basis to obtain a difference from the original image data by a scanner, correcting the original image data to reflect the difference, and then printing again, A print image closer to the original image is obtained.

It should be noted that the print image correction processing in the present embodiment is automated, and the correction based on the difference data is repeated a plurality of times for the same original image data.
It is possible to further reduce the difference between the original image and the print image. That is, in addition to the correction based on the difference between the original image data and the test image data described in the present embodiment, the correction based on the difference between the original image data and the corrected image data is performed again.
Further, the correction may be repeatedly performed.

Further, according to the present embodiment, the number of executions of the print image correction process can be reduced by providing the function of learning the printer characteristics based on a plurality of difference images to the printer driver. Furthermore, by automating the print image correction function and the printer characteristic learning function in the personal computer of the present embodiment, it is possible to automatically control the adjustments relating to the basic settings of the printer driver, such as color shading, brightness, and saturation. Therefore, the more the printer is used, the more automatically the quality of the printed image is improved.

In this embodiment, an example has been described in which print image data is directly corrected based on difference data. However, the present invention is not limited to this example. It is also possible to set based on data, and of course, this setting process can be automated by learning.

In the present embodiment, an example has been described in which corrected image data is stored in the correction memory 76 and correction printing is performed. However, for example, the correction memory 76 is not provided, and the correction calculation unit 75 operates in the original memory in the print memory 71. A configuration in which image data is directly corrected and updated may be used.

<Second Embodiment> Hereinafter, a second embodiment according to the present invention will be described.
An embodiment will be described.

The configuration and functional configuration of the personal computer according to the second embodiment are the same as those shown in FIGS.
Therefore, the description is omitted.

FIG. 6 is a block diagram schematically showing a configuration for realizing the print image correction function in the second embodiment. 6, the same components as those in FIG. 3 shown in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. 6 is characterized in that the contents of the difference memory 74 are output to the printer driver 104 as they are.

FIG. 7 is a diagram schematically showing the state of the print image correction processing in the second embodiment. In FIG.
Reference numerals 41, 42, and 43 each visually indicate image data based on its density. Reference numeral 43 denotes original image data held in the print memory 71. 41
When the original image data 43 is printed on the recording paper 15, the printer 14 has run out of ink in the middle, and the defective printed matter printed in an insufficient state is read by the scanner 13. 4 shows defective image data stored in the memory 72.

The comparison operation unit 73 extracts a difference between the original image data 43 held in the print memory 71 and the defective image data 41 held in the scanner memory 72, and stores the difference in the difference memory 74. 42 shown in FIG.
This is the content of the difference memory 74, which is difference data indicating a shortage of ink.

In the second embodiment, the difference data 42 held in the difference memory 74 is overprinted on the recording paper 15 on which the defective image data 41 has already been printed, so that the original image data 43 Substantially equal printed images can be obtained.

For example, the printer 14 is a color printer of a type in which each color ink of magenta (M), cyan (C), yellow (Y) and black (K) is mixed and printed, and the M ink is insufficient during printing. The remaining image is printed using only the C, Y, and K inks.
1 is obtained. In this case, the defect image data 41
And the original image data 43, the difference data 42 indicating the lost M is obtained. Therefore, the defective image data 4
The difference data 4 for the recording paper 15 on which 1 is printed
2 is further overprinted, so that a print image close to the original image data 43 can be obtained.

FIG. 8 is a flowchart showing a print image correction process in the second embodiment. First, step S6
In 1, when the original image data 43 held in the print memory 71 is printed by the printer 14, a defective printed matter is obtained due to ink shortage. Then, in step S62, the user determines whether to correct the defective print. The result of the determination is determined by the user, for example, on the keyboard 12.
Is input as a print image correction instruction.

If there is a print image correction instruction, step S63
Then, the user causes the scanner 13 to read the defective printed matter printed out, so that the defective image data 41 is stored in the scanner memory 72. In step S64, the difference between the original image data 43 in the print memory 71 and the defective image data 41 in the scanner memory 72 is extracted, and the difference data 42 is stored in the difference memory 74. Then, after the user replenishes the ink in step S65, the user sets the defective printed matter on which the defective image data 41 is printed for printing again in step S66, and instructs the start of printing, whereby the difference data is printed on the recording paper 15. 42 is defective image data 41
Is obtained.

The printed matter obtained in this manner has substantially the same image quality as when the original image data 43 is ideally printed.

As described above, according to the second embodiment, when an insufficient print image is obtained due to a lack of ink in the printer, the print image is scanned and input to obtain a difference from the original image. By printing the difference over the print image, a print image close to the original image is obtained. Therefore, it is possible to utilize the recording paper in which the trouble has occurred without wasting it.

Although the above-described first and second embodiments have been described using a personal computer as an example, the image processing apparatus and the image reading apparatus can be read regardless of the type of image processing apparatus, the type of built-in device, or the type of external device. The present invention can be applied to any image processing system including a device and an image recording device.

[0049]

[Other Embodiments] Even if the present invention is applied to a system including a plurality of devices (for example, a host computer, an interface device, a reader, a printer, etc.), an apparatus (for example, a copying machine) Machine, facsimile machine, etc.).

Another object of the present invention is to provide a system or an apparatus with a storage medium storing software program codes for realizing the functions of the above-described embodiments,
And MPU) read and execute the program code stored in the storage medium.

In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS (Operating System) running on the computer based on the instruction of the program code. ) May perform some or all of the actual processing, and the processing may realize the functions of the above-described embodiments.

Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the program code is read based on the instruction of the program code. It goes without saying that the CPU included in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments. When the present invention is applied to the storage medium, the storage medium stores program codes corresponding to the flowcharts described above.

[0055]

As described above, according to the present invention, the quality of a printed image can be made equal to that of an original image.

Further, it is possible to perform appropriate printing on recording paper on which defective printing has been performed.

[0057]

[Brief description of the drawings]

FIG. 1 is an external perspective view of an image processing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a functional configuration of the image processing apparatus according to the embodiment.

FIG. 3 is a block diagram illustrating a functional configuration of a print image correction process according to the embodiment.

FIG. 4 is a diagram schematically illustrating a print image correction process according to the embodiment.

FIG. 5 is a flowchart illustrating a print image correction process according to the embodiment.

FIG. 6 is a block diagram illustrating a functional configuration of a print image correction process according to a second embodiment of the present invention.

FIG. 7 is a diagram schematically illustrating a print image correction process in a second embodiment.

FIG. 8 is a flowchart illustrating a print image correction process according to the second embodiment.

[Explanation of symbols]

 Reference Signs List 11 monitor 12 keyboard 13 scanner 14 printer 15 recording paper 21 original image data 22 test image data 23 difference data 41 defective image data 42 difference data 43 original image data

Continued on the front page F term (reference) 2C061 AR01 HH03 HJ06 HK11 HN15 5B057 BA11 CA01 CA12 CB01 CB12 CC01 CE17 CH01 CH11 DA16 DB02 DB06 DC32 5C077 LL19 MM21 MP08 NP01 PP05 PP37 PP47 PQ12 PQ20 PQ22 SS01 SS01 SS01 SS01 SS01 SS01 SS02 SS01 MA11 MA17 NA03 NA18

Claims (21)

[Claims] A recording unit that records an image on a recording medium; a reading unit that reads an image on a recording medium; a first holding unit that retains image data recorded by the recording unit; and the reading unit. A second holding unit for holding the image data read by the method, and extracting the difference information between the image data held by the first holding unit and the image data held by the second holding unit. Means, correction means for correcting image data held in the first holding means based on the extracted difference information to create correction data, and holding in the first holding means by the recording means Control means for reading the recording medium on which the image data is recorded by the reading means, and then controlling the recording means to record the correction data created by the correcting means on the recording medium. An image processing apparatus comprising: 2. The apparatus according to claim 1, further comprising: third holding means for holding the correction data, wherein the control means controls the recording means to record the correction data held in the third holding means on a recording medium. The image processing apparatus according to claim 1, wherein: 3. The method according to claim 1, wherein the third holding unit holds a plurality of pieces of correction data, and the extracting unit includes a first holding unit that holds the first and second correction data.
And the first image data stored in the third storage unit.
And correcting the second image data held in the first holding means again based on the difference information with the correction data to generate second correction data, and storing the corrected data in the third holding means. 3. The image processing apparatus according to claim 2, wherein: 4. The image according to claim 3, wherein the control unit controls the latest correction data held in the third holding unit to be recorded on a recording medium by the recording unit. Processing equipment. 5. The third holding unit holds a plurality of correction data, and the control unit sets a recording condition in the recording unit based on the plurality of correction data held in the third holding unit. The image processing apparatus according to claim 2, wherein the control is performed. 6. The image processing apparatus according to claim 1, further comprising a fourth holding unit that holds the difference information extracted by the extracting unit. 7. The fourth holding unit holds a plurality of pieces of difference information, and the control unit sets a recording condition in the recording unit based on the plurality of pieces of difference information held in the fourth holding unit. The image processing apparatus according to claim 6, wherein the control is performed. 8. The recording apparatus according to claim 1, wherein the recording unit records a color image on a recording medium using a plurality of recording agents, and the reading unit reads the color image on the recording medium to generate color image data. 2. The image processing device according to 1. 9. The apparatus according to claim 1, further comprising display means for displaying a color image, wherein said first holding means holds the color image data created via said display means. Image processing device. 10. The image processing apparatus according to claim 1, wherein said recording means and said reading means are provided in the same housing, and the functions of both are realized by exchanging a recording head and a reading head. apparatus. 11. A recording unit for recording an image on a recording medium, a reading unit for reading an image on a recording medium, a first holding unit for holding image data recorded by the recording unit, and the reading unit A second holding unit for holding the image data read by the method, and extracting the difference information between the image data held by the first holding unit and the image data held by the second holding unit. Means for reading, by the reading means, a recording medium on which the image data held in the first holding means is recorded by the recording means, and then storing the image data based on the difference information extracted by the extracting means. Control means for controlling recording on the recording medium by means of the image processing apparatus. 12. The recording unit records a color image on a recording medium using a plurality of recording agents, and the control unit performs the control when at least one of the plurality of recording agents in the recording unit runs short. The image processing apparatus according to claim 11, wherein the image processing is performed. 13. A method for controlling an image processing apparatus, comprising: a recording unit for recording an image on a recording medium; and a reading unit for reading an image on the recording medium, wherein the original image data is recorded on the recording medium by the recording unit. A first recording step of recording the original image data, a reading step of reading the recording medium on which the original image data is recorded by the reading means to obtain test image data, and a difference information between the original image data and the test image data. An extracting step of extracting; a correcting step of correcting the original image data based on the extracted difference information to generate correction data; and a second recording of recording the correction data on a recording medium by the recording means. And a control method for the image processing apparatus. 14. A re-extraction step for extracting difference information between the original image data and the correction data, further correcting the original image data based on the difference information extracted in the re-extraction step. A re-correction step of creating correction data, wherein the re-extraction step and the re-correction step can be performed a plurality of times,
14. The method according to claim 13, wherein, in the second recording step, the further correction data is recorded on a recording medium by the recording unit. 15. A recording condition control step for controlling a recording condition in the recording means based on a plurality of correction data created by executing the correction step a plurality of times. 14. The method for controlling an image processing apparatus according to claim 13. 16. A recording condition control step for controlling a recording condition in said recording means based on a plurality of pieces of difference information extracted by executing the extracting step a plurality of times. 14. The method for controlling an image processing apparatus according to claim 13. 17. A method for controlling an image processing apparatus, comprising: a recording unit that records an image on a recording medium; and a reading unit that reads an image on the recording medium, wherein the original image data is recorded on the recording medium by the recording unit. A first recording step of recording the original image data, a reading step of reading the recording medium on which the original image data is recorded by the reading means to obtain test image data, and a difference information between the original image data and the test image data. An extracting step of extracting, and a second recording step of recording image data based on the difference information on a recording medium on which the original image data has been recorded by the recording means. Control method. 18. An image processing system, comprising: a recording device that records an image on a recording medium with respect to the image processing device; and a reading device that reads an image on the recording medium, wherein the image processing device comprises: A first holding unit that holds the image data recorded by the recording device, a second holding unit that holds the image data read by the reading device, and an image data that is held by the first holding unit. Extracting means for extracting difference information from the image data held in the second holding means; and correcting the image data held in the first holding means based on the extracted difference information. Correction means for creating data; and a recording medium on which the recording device records the image data held in the first holding means, which is read by the reading device, and which is then created by the correction means. The image processing system characterized by the correction data and a control means for controlling so as to record on a recording medium by the recording apparatus. 19. An image processing system, comprising: a recording device that records an image on a recording medium with respect to the image processing device; and a reading device that reads the image on the recording medium, wherein the image processing device comprises: A first holding unit that holds the image data recorded by the recording device, a second holding unit that holds the image data read by the reading device, and an image data that is held by the first holding unit. Extracting means for extracting difference information from the image data held in the second holding means; and a recording medium on which the image data held in the first holding means is recorded by the recording device by the reading device. Control means for controlling the recording device to record image data based on the difference information extracted by the extracting means on the recording medium after reading. Image processing system for the butterflies. 20. A storage medium storing a control program for an image processing apparatus having recording means for recording an image on a recording medium, and reading means for reading an image on the recording medium, wherein the control program comprises: A code of a first recording step of recording image data on a recording medium by the recording unit; a code of a reading step of reading test data by reading the recording medium on which the original image data is recorded by the reading unit; A code of an extraction step of extracting difference information between the original image data and the test image data, a code of a correction step of correcting the original image data based on the extracted difference information to create correction data, A code for a second recording step of recording the correction data on a recording medium by the recording means. 21. A storage medium storing a control program for an image processing apparatus having recording means for recording an image on a recording medium, and reading means for reading an image on the recording medium, wherein the control program comprises: A code of a first recording step of recording image data on a recording medium by the recording unit; a code of a reading step of reading test data by reading the recording medium on which the original image data is recorded by the reading unit; A code of an extraction step for extracting difference information between the original image data and the test image data, and a second step of recording image data based on the difference information on a recording medium on which the original image data is recorded by the recording unit. And a code for a recording step.