JPH09186884A - Image processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to form an image which gives an impression of visually high picture quality and increase a data transfer speed by transferring only a black image with high resolution. SOLUTION: When color image data are transferred from a host computer 3000 to a printer 1500 to print a color image, the computer 3000 executes a control program stored in a program ROM 32 by a CPU 1. Namely, a color image consisting of C, M, Y, and K components is separated into a K-component image and a C, M, and Y component image; and the separated Y, M, and C component image is rasterized with low resolution of, for example, 300dpi and the K component image is rasterized with high resolution of, for example, 600dpi. Consequently, the amount of data transferred to the printer 1500 is reduced when all the image data are of high resolution, so the transfer time can be shortened. Further, the printer 1500 forms a color image wherein character line drawings and outlines are fine and sharp.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing system, for example, an image processing system such as a printer connected to a host computer via a bidirectional interface.

[0002]

2. Description of the Related Art Conventionally, a host computer has been connected,
In a color image processing apparatus such as a color printer which outputs a color image transferred from the host computer, a color image is formed by four color components of cyan (C), magenta (M), yellow (Y) and black (K). The image was printed out on the recording medium. In such an image processing apparatus, when the resolution of a color image to be output is increased, for example, when the resolution is increased from 300 dpi to 600 dpi, the output image data amount is increased 16 times. Therefore, if the resolution of the image data is increased in the host computer and the image data is directly transferred to the printer for print output, the transfer time increases as the amount of data increases, so the printing speed is The print speed is slower than it was before the resolution was increased.

Therefore, when the high resolution image data is transferred to the printer on the host computer side to obtain the print output, in order to obtain the print output at the same speed as before the resolution is increased, the high speed transfer is required. This causes an increase in hardware such as a memory on the host computer side, resulting in a very large cost increase factor.

Therefore, in order to reduce the amount of data to be transferred, the image data is compressed in the host computer, and the compressed image data is transferred to the printer to improve the transfer speed and improve the throughput. The method of seeking

[0005]

However, in the above-mentioned conventional example, one data compression method is used in the data compression in the host computer. Therefore,
The compression efficiency varies depending on the type of image data to be compressed, and a stable effect cannot be obtained. For example, there is a problem in that the compression may be inappropriate depending on the type of image data, and the amount of data after compression may be larger than that before compression.

The present invention has been made in order to solve the above-mentioned problems, and C, M, and
Of the four colors of Y and K, only K (black), which is the most frequently used image in the image and requires the most visual expression, is transferred to the output device as high resolution,
An object of the present invention is to provide an image processing system capable of suppressing an increase in the amount of data transfer and visually improving the image quality of an image to be formed by forming and outputting the image.

[0007]

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

That is, in an image processing system in which an image processing device and an output device are connected, in the image processing device, a color image is separated for each color component, and the separated first
Is converted to a first resolution, color components other than the first color component are converted to a second resolution, and each color component after the conversion is transferred to the output device.

For example, the first color component is an achromatic color component.

For example, the first color component is a black component.

For example, the first resolution is higher than the second resolution.

Further, in the image processing system in which the image processing device and the output device are connected, in the image processing device, an operator sets an image output mode to separate a color image for each color component, and the separation is performed. The first color component is converted to a first resolution according to the image output mode, the color components other than the first color component are converted to a second resolution, and a signal indicating the image output mode is converted to the first resolution. It is characterized in that it is transferred to an output device, and each color component after the conversion is transferred to the output device.

For example, in the output device, smoothing is performed according to a signal indicating the image output mode transferred from the image processing device.

For example, in the output device, first smoothing is applied to the first color component in accordance with a signal indicating the image output mode transferred from the image processing device,
A second smoothing is applied to color components other than the first color component.

For example, the first color component is an achromatic component.

For example, the first color component is a black component.

For example, the first resolution is higher than the second resolution.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below in detail with reference to the drawings.

<First Embodiment> First, the configurations of a laser beam printer and an ink jet printer, which are image output devices suitable for applying the present embodiment, will be described with reference to FIGS.
This will be described with reference to FIG. It is needless to say that the image output device to which the present embodiment is applied is not limited to the laser beam printer and the inkjet printer, and may be a printer of another printing method.

FIG. 1 is a sectional view showing the structure of a first output device to which the present invention can be applied, for example, a case of a laser beam printer (LBP).

In the figure, reference numeral 1500 denotes an LBP main body, which inputs and stores print information (character code, etc.), form information, macro commands, etc. supplied from a host computer connected to the outside. A corresponding character pattern, form pattern, or the like is created in accordance with the above, and an image is formed on a recording medium such as recording paper. 1
Reference numeral 501 is an operation panel on which switches for operation and LED indicators are arranged, and 1000 is an LBP main body 1500.
This is a printer control unit that analyzes the entire control and character information supplied from the host computer. The printer control unit 1000 mainly converts character information into a video signal having a corresponding character pattern and outputs the video signal to the laser driver 1502. The laser driver 1502 is a circuit for driving the semiconductor laser 1503, and switches on / off a laser beam 1504 emitted from the semiconductor laser 1503 according to an input video signal. The laser beam 1504 is oscillated in the horizontal direction by the rotary polygon mirror 1505 to scan and expose the electrostatic drum 1506. As a result, an electrostatic latent image of a character pattern is formed on the electrostatic drum 1506. This latent image is the electrostatic drum 15
After being developed by the developing unit 1507 arranged around the circumference 06, it is transferred to the recording paper. A cut sheet is used as the recording sheet, and the cut sheet recording sheet is stored in a sheet cassette 1508 mounted on the LBP 1500, and has a sheet feeding roller 1509, a conveying roller 1510, and a conveying roller 1511.
And are taken into the device by the electrostatic drum 1506.
Is supplied to. Further, the LBP main body 1500 is provided with at least one or more card slots (not shown) so that an optional font card and a control card (emulation card) having a different language system can be connected in addition to the built-in font.

FIG. 2 is an external view showing the configuration of a second output device to which the present invention can be applied, for example, the case of an ink jet recording device (IJRA).

In FIG. 2, the spiral groove 500 of the lead screw 5005 that rotates via the driving force transmission gears 5011 and 5009 in conjunction with the forward and reverse rotations of the drive motor 5013.
The carriage HC engaged with the carriage 4 has a pin (not shown) and is reciprocated in the directions of arrows a and b. An ink jet cartridge IJC is mounted on the carriage HC. A paper pressing plate 5002 presses the paper against the platen 5000 in the carriage movement direction. Reference numerals 5007 and 5008 denote photocouplers, which function as home position detection means for confirming the presence of the carriage lever 5006 in this region and switching the rotation direction of the motor 5013. Reference numeral 5016 denotes a member for instructing a cap member 5022 for capping the entire surface of the recording head. Reference numeral 5015 denotes suction means for suctioning the inside of the cap, and performs suction recovery of the recording head via the opening 5023 in the cap. Reference numeral 5017 denotes a cleaning blade.
19 makes it possible to move back and forth. Reference numeral 5018 denotes a main body supporting plate, which indicates the above 5017 and 5019. 501
Reference numeral 2 denotes a lever for starting suction for suction recovery, which moves with the movement of the cam 5020 engaging with the carriage,
The movement of the driving force from the driving motor is controlled by known transmission means such as clutch switching.

The capping, cleaning, and suction recovery are configured so that desired processing can be performed at their corresponding positions by the action of the lead screw 5005 when the carriage comes to the home position side area. It suffices if it is configured so as to perform the desired operation.

Next, a control configuration for executing the recording control of the above-mentioned second output device will be described. FIG. 3 is a block diagram showing the configuration of the control circuit of the above-mentioned inkjet printer IJRA. In the figure showing a control circuit, 1700 is an interface for inputting a recording signal, 1
Reference numeral 701 is an MPU, and 1702 is an RO for storing a control program executed by the MPU 1701 and host print information.
M and 1703 are DRAMs for storing various data (the above-mentioned recording signals, recording data supplied to the head, etc.).
A gate array 1704 controls the supply of output data to the recording head 1708.
0, data transfer control between the MPU 1701 and the DRAM 1703. 1710 is a carry motor for carrying the recording head 1708, 1709 is a carrying motor for carrying the recording paper, 1705 is a head driver for driving the recording head, 1706 is the carrying motor 1709.
The motor driver 1707 drives the carrier motor 1710.

In the above-configured output device, when input information is input from the host computer 100, which will be described later, through the interface 1700, the input information is output between the gate array 1704 and the MPU 1701 for printing. Is converted to. Then, the motor drivers 1706 and 1707 are driven, the recording head is driven according to the output information sent to the head driver 1705, and printing is executed.

The MPU 1701 has an interface 17
00, communication processing with a host computer 3000 described later is possible, and memory information and resource data regarding the DRAM 1703 and host print information in the ROM 1702 are stored in the host computer 300 described later.
0 can be notified.

FIG. 4 is a block diagram showing the arrangement of the image processing system in this embodiment. As the image output device in this embodiment, the LBP shown in FIG. 1 described above or the IJRA shown in FIGS. 2 and 3 can be applied.
Hereinafter, the LBP shown in FIG. 1 described above will be described as an example. It should be noted that, as long as the function of the present embodiment is executed, it may be a single device, a system including a plurality of devices, or a system in which processing is performed via a network such as a LAN. Needless to say, the present invention is applicable.

In FIG. 4, reference numeral 3000 is a host computer. 1 is a CPU, the program ROM 32
Based on the document processing program etc. stored in, the document processing in which graphics, images, characters, tables (including spreadsheets), etc. are mixed is executed, and each device connected to the system bus 4 is comprehensively controlled. To do. In addition, the program ROM 32
Includes, for example, the CP shown in the flowchart of FIG.
Stores U1 control programs, etc., font ROM 31
Stores the font data and the like used in the document processing, and the data ROM 33 stores various data used in the document processing and the like. 2 is a RAM, C
It functions as a main memory, a work area, and the like of the PU1. 5
Is a keyboard controller (KBC), which controls key input from the keyboard (KB) 9 or a pointing device (not shown). 6 is a CRT controller (CRT
C), which controls the display on the CRT display (CRT) 10. A disk controller (DKC) 7 is a hard disk (HD) or floppy disk (F) for storing a boot program, various applications, font data, user files, edit files, and the like.
The access to the external memory 11 including D) is controlled. Reference numeral 8 denotes a printer controller (PRTC), which is a printer 100 via a predetermined bidirectional interface 21.
0 to execute communication control processing with the printer 1500.

The CPU 1 executes the outline font rasterization processing to the display information RAM set in the RAM 2, for example, and enables so-called WYSIWYG on the CRT 10. Also, the CPU 1
On the CRT 10, various windows registered based on commands designated by a mouse cursor (not shown) or the like are opened, and various data processing is executed.

In the printer 1500, reference numeral 12 denotes a printer CPU, which accesses a device connected to the system bus 15 based on a control program stored in the program ROM 132 or a control program stored in the external memory 14. The integrated control is performed to output an image signal as output information to the printing unit (printer engine) 17 connected via the printing unit interface 16.
In addition, the program ROM 132 stores in FIGS.
The control program of the CPU 12 as shown in the flowchart of FIG. Further, the font ROM 131 stores font data and the like used when generating the output information, and the data ROM 133 is used on the host computer 3000 in the case of a printer having no external memory 14 such as a hard disk. It stores information such as The CPU 12 can perform communication processing with the host computer 3000 via the input unit 18, and is configured to be able to notify the host computer 3000 of information and the like in the printer 1500.

Reference numeral 19 denotes a RAM which functions as a main memory, a work area, etc. of the CPU 12, and is constructed so that its capacity can be expanded by an optional RAM connected to an expansion port (not shown). The RAM 19 is an output information expansion area, environment data storage area, NVRAM
It is used as (non-volatile RAM). External memory 14 such as the hard disk (HD) or IC card described above
Is the CPU by the disk controller (DKC) 20.
Access from 12 is controlled. The external memory 14
Is optionally connected to store phones and data, emulation programs, form data, etc.
The external memory 14 is not limited to one, but at least one external memory is provided, and in addition to the built-in font, an optional font card and a plurality of external memories storing programs for interpreting printer control languages of different languages can be connected. You may.

Reference numeral 1501 denotes the above-mentioned operation unit,
Switches and LEDs for operating the printer 1500
The display etc. are arranged. Further, an NVRAM (not shown) may be arranged to store printer mode setting information and the like in the operation unit 1501.

In the image processing system of this embodiment having the above-described configuration, the host computer 3000
When the color image data is transferred from the printer to the printer 1500 and color printing is performed, among the C, M, Y and K components forming the color image in the host computer 3000,
It is characterized in that only the K component (black image) has a high resolution and the other color components have a low resolution, thereby reducing the amount of data transferred to the printer 1500.

The data transfer processing of the host computer 3000 according to this embodiment will be described below with reference to the flowchart of FIG. The processing is performed by the program R
The control program stored in the OM32
It is realized by executing by.

First, in step S51, C, M,
A color image composed of Y and K components is converted into a K component image and C,
Separate into M and Y component images. Next, in step S52, for example, 3 is applied to the separated Y, M, and C component images.
Rasterize at a resolution of 00 dpi. Then, in step S53, the separated K component image is rasterized at a resolution of, for example, 600 dpi.
That is, the K component image is rasterized with high resolution and the C, M, Y component images are rasterized with low resolution. Note that steps S52 and S
The order of 53 may be reversed. Incidentally, step S
52 and S53 are, for example, data ROM
Pre-stored in 133. Of course, the resolution data may be held in the RAM 19 so that it can be appropriately changed as needed.

In step S54, the K component image rasterized as described above and the C, M, Y component images are respectively transmitted from the PRTC 8 to the bidirectional interface 21.
Output to the printer 1500 via. Printer 150
At 0, an output image is formed for each color component according to the input resolution.

As described above, the host computer 3
In 000, an output image is formed with different resolutions for the K component of the color image data and the other color components (C, M, Y components). That is, the K component image, which is often a character line image or a contour line, is formed with a higher resolution than the other color component images. Therefore, the amount of image data transferred to the printer 1500 can be reduced as compared with the case where all the image data have high resolution, and thus the transfer time can be shortened. Then, also in the printer 1500, a color image in which character line images and outlines are finely and clearly defined is formed.

As described above, according to this embodiment, an increase in the amount of data due to the higher resolution of the output image is suppressed, the processing speed is improved, and an image which gives a visually high quality impression is formed. It becomes possible to do.

<Second Embodiment> The second embodiment of the present invention will be described below.
An embodiment will be described.

The second embodiment is characterized in that it enables finer resolution conversion than the above-described first embodiment. Since the device configuration in the second embodiment is the same as that in the above-described first embodiment, the description thereof will be omitted.

FIG. 6 shows a block configuration of an image processing system according to the second embodiment. The same components as those in FIG. 4 described above are designated by the same reference numerals and the description thereof will be omitted. In FIG. 6, reference numeral 22 denotes a smoothing unit, which performs the smoothing processing which is a feature of the second embodiment.

FIG. 7 shows a detailed block configuration of the smoothing section 22. In FIG. 7, reference numeral 222 denotes a black smoothing circuit (B-AIR (Automatic Image Refinement)), which is K transferred from the host computer 3000.
Smoothing processing is applied to the component images. Also, 22
A color smoothing circuit (C-AIR) 3 smoothes the C, M, and Y component images transferred from the host computer 3000. A selection unit 221 controls the operations of the B-AIR 222 and C-AIR 223 according to the print mode set in the host computer 3000.

Image output processing according to the second embodiment will be described below with reference to the flowcharts of FIGS. 8 and 9.

First, the image transfer processing in the host computer 3000 will be described with reference to FIG. The processing is realized by the CPU 1 executing the control program stored in the program ROM 32.

First, in step S71, the host computer 3000 separates a color image composed of C, M, Y, and K components into a K component image and a C, M, and Y component image. Next, in step S72, the separated Y, M,
The C component image is rasterized at a resolution of 300 dpi, for example.

Then, in step S73, KB9 or C
It is determined whether the print mode designated by the operator via the RT 10 or the like is the “fine mode”.

The print mode in the second embodiment will be described. In the host computer 3000 of the second embodiment, it is possible to first select "high speed mode" or "fine mode" as the print mode indicating the output quality at the time of image output. The "high-speed mode" is a mode in which the quality of the character line image (K component image) is kept to a minimum because the printing speed is important, and the "fine mode" is the character line image and the color. Area (C, M, Y
This is a mode for obtaining high-quality output for both component images). Further, three stages of "fine mode 1", "fine mode 2", and "fine mode 3" are provided as the "fine mode", and a high-quality output image is obtained in the order of 1, 2, 3.

Returning to FIG. 8, if it is the "fine mode" in step S73, that is, if any of the above-mentioned "fine mode 1", "fine mode 2", and "fine mode 3" is designated, the step is performed. Proceed to S74. In step S74, the separated K component image is rasterized at a resolution of, for example, 600 dpi. That is, the K component image is rasterized with high resolution and the C, M, Y component images are rasterized with low resolution.

Then, in step S75, the CPU determines whether the print mode is "fine mode 1".
Judgment at 12. If it is "fine mode 1", the process proceeds to step S81, but if not, it is regarded as "fine mode 2" or "fine mode 3" and step S81 is performed.
Proceed to 76. In step S76, the printer 1500 is used to smooth the C, M, and Y component images.
To the C-AIR 223, an activate signal “C-AIR_act instruction” instructing smoothing execution in the C-AIR 223 is issued as ON.

Then, in step S77, it is determined whether the print mode is "fine mode 2". If it is "fine mode 2", the process proceeds to step S81. If not, it is determined that "fine mode 3" and the process proceeds to step S78. In step S78, in order to perform high resolution smoothing on the K component image, the activate signal "B-AIR_act2 instruction" for instructing the printer 1500 to execute high resolution smoothing in the B-AIR 222 is issued as ON. Then, the process proceeds to step S84.

On the other hand, if it is determined in step S73 that the print mode is not the "fine mode", that is, it is determined that the print mode is the "high speed mode", the process proceeds to step S79. In step S79, the separated K component image is rasterized at a resolution of, for example, 300 dpi. That is, the K component image and the C, M, Y component images are rasterized at the same low resolution.

Then, in step S80, in order to apply low resolution smoothing to the K component image, an activate signal "B-" which instructs the printer 1500 to execute low resolution smoothing in the B-AIR 222.
"AIR_act1 instruction" is issued as ON. Then, the process proceeds to step S81.

In step S81, the K component image and the C, M, Y component images rasterized as described above are output to the printer 1500 via the bidirectional interface 21.

Next, FIG. 9 shows a flowchart of the operation of the printer 1500 corresponding to the operation of the host computer 3000 shown in the flowchart of FIG.

First, in step S91, the selecting unit 221 in the smoothing unit 22 causes the host computer 3
Activate signal “C-AIR_act transmitted from 000
It is determined whether the "command" is on. If it is on, the C-AIR 223 is activated in step S92 to enable smoothing.

Next, in step S93, the selection unit 221 in the smoothing unit 22 causes the host computer 3
Activate signal "B-AIR_act1
It is determined whether the "command" is on. If it is on, the B-AIR 222 is activated in step S94 to enable low resolution smoothing.

Next, in step S95, the selection unit 221 in the smoothing unit 22 causes the host computer 3
Activate signal "B-AIR_act2
It is determined whether the "command" is on. If it is on, the B-AIR 222 is activated in step S96 to enable high resolution smoothing.

Then, in step S97, the K, C, M and Y image data transferred from the host computer 3000 are respectively transferred to the B-AIR222 and C-AIR2.
23, and the set smoothing process is performed.
In addition, in B-AIR222, C-AIR223,
When smoothing is not instructed by the activate signal, smoothing processing is not performed, and the input image data is output as through.

Then, in step S98, the smoothed image data is output to the printing unit 17 via the printing unit I / F 16 to form an output image corresponding to the resolution for each color component.

That is, in the second embodiment, the K component image and the C, M, Y component images for each mode are performed by performing the control as described above according to the print mode set in the host computer 300. The following processing will be applied to each of these. However, in the following notation, for example, "K (600dpi + AIR)" is
"C component image with high resolution of 600 dpi and smoothing", "C (300dpi + AIR)"
Indicates that “C, M, and Y component images have a low resolution of 300 dpi and are smoothed”.

High-speed mode: K (300dpi + AIR) + C (300dpi) Fine mode 1: K (600dpi) + C (300dpi) Fine mode 2: K (600dpi) + C (300dpi + AIR) Fine mode 3: K (600dpi + AIR) + C (300dpi + AIR) Therefore, the optimum image quality can be obtained by setting the print mode according to the purpose. For example, the "high-speed mode" is effective when it is desired to perform high-speed high-quality printing of only a text in a color image. Further, in "fine mode 1", the same image quality as in the above-described first embodiment can be obtained, and in "fine mode 2" and "fine mode 3", the image quality in "fine mode 1" can be further improved. , "Fine mode 2" can obtain an image quality equivalent to 600 dpi for all colors by smoothing color images (C, M, Y component images), and "Fine mode 3" further improves the image quality for black images (K component images). By performing smoothing on the image, it is possible to output a higher quality image.

Although an example in which the print mode is set on the host computer 3000 side has been described, the operator can of course operate the operation unit 15 on the printer 1500 side.
The present invention can be realized by setting the print mode from 01.

As described above, according to the second embodiment,
By performing resolution conversion and smoothing processing for each color component according to the print mode set by the operator in the host computer, it is possible to output an image with the optimum image quality desired by the operator.

The present invention may be applied to a system composed of a plurality of devices such as a host computer, an interface and a printer, or to an apparatus composed of a single device such as a copying machine. That is, the same effect can be obtained by rasterizing only the black component with high resolution and the other color components with low resolution for the color image data read by the scanner.

It goes without saying that the present invention can also be applied to the case where it is implemented by supplying a program to a system or an apparatus. In this case, the storage medium storing the program according to the present invention constitutes the present invention. Then, by reading the program from the storage medium to the system or device, the system or device operates in a predetermined manner.

[0067]

As described above, according to the present invention, when the color image data is transferred from the host computer to the printer and a high resolution output image is obtained, only the black image is transferred at the high resolution. It suppresses an increase in the amount of data that accompanies the higher resolution of image data, improves the processing speed, and allows the output image to be finely and clearly expressed, that is, an image that gives a visually high-quality impression. Can be formed. Therefore,
Since the entire image can be visually viewed as having high quality and the increase in the image data amount can be suppressed, the data transfer rate can be improved.

Further, by performing appropriate resolution conversion and smoothing processing for each color component according to the print mode set by the operator on the host computer side, image output with the optimum image quality desired by the operator can be performed. It will be possible.

[0069]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a first output device to which an embodiment according to the present invention can be applied.

FIG. 2 is an external view showing a configuration of a second output device to which this embodiment can be applied.

FIG. 3 is a block diagram illustrating a control configuration of a second output device.

FIG. 4 is a block diagram showing a configuration of an image processing system according to this embodiment.

FIG. 5 is a flowchart showing an image transfer processing procedure in the present embodiment.

FIG. 6 is a block diagram showing a configuration of an image processing system according to a second embodiment of the present invention.

FIG. 7 is a block diagram showing a detailed configuration of a smoothing unit in the second embodiment.

FIG. 8 is a flowchart showing an image transfer processing procedure in the second embodiment.

FIG. 9 is a flowchart showing an image forming processing procedure in the second embodiment.

[Explanation of symbols]

 3000 host computer 1500 printer 12 CPU 15 input unit 16 printing unit I / F 22 smoothing unit 221 selecting unit 222 B-AIR (black smoothing unit) 223 C-AIR (color smoothing unit)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G09G 5/02 H04N 1/46 Z

Claims (10)

[Claims] 1. An image processing system in which an image processing device and an output device are connected to each other, wherein a color image is separated for each color component in the image processing device, and the separated first color component is a first color component. An image processing system, comprising: converting into a resolution; converting a color component other than the first color component into a second resolution; and transferring each color component after the conversion to the output device. 2. The image processing system according to claim 1, wherein the first color component is an achromatic color component. 3. The image processing system according to claim 2, wherein the first color component is a black component. 4. The image processing system according to claim 1, wherein the first resolution is higher than the second resolution. 5. An image processing system in which an image processing device and an output device are connected to each other, wherein in the image processing device, an operator sets an image output mode to separate a color image for each color component, The first color component is converted to a first resolution according to the image output mode, the color components other than the first color component are converted to a second resolution, and the signal indicating the image output mode is converted to the first resolution. An image processing system, comprising: transferring to an output device; and transferring each color component after the conversion to the output device. 6. The output device performs smoothing according to a signal indicating an image output mode transferred from the image processing device.
The image processing system described in the above. 7. The output device performs a first smoothing process on the first color component according to a signal indicating an image output mode transferred from the image processing device, and outputs the first color component. The image processing system according to claim 6, wherein the second smoothing is performed on a color component other than the component. 8. The image processing system according to claim 5, wherein the first color component is an achromatic color component. 9. The image processing system according to claim 8, wherein the first color component is a black component. 10. The image processing system according to claim 5, wherein the first resolution is higher than the second resolution.