JPH0732668A - Image processing device - Google Patents

Abstract

PURPOSE:To select a high speed output system so as to output with high speed at outputting a plurality of sheets by providing a means wherein a predetermined image data corresponding to a predetermined segment is retrieved from an image memory and transferred to an image forming section. CONSTITUTION:When output of a plurality of sheets is determined at S104, the whole PDL data stored in a hard disk is read out and expanded, and the expanded data is written in the hard disk. Next, p which indicates the number of output pages is substituted for 0 at S112, the p is compared with the designated number of sheets of output at S113. When it is false, n is substituted for 1 at S114. A part included in a second n segment in a raster image data expanded at S111 being stored in the hard disk at S115 is transferred to a raster image memory from the hard disk. Then, after an image forming section is started and an image for 1 segment is formed at S116, it is determined whether the image formation as to the whole segment is completed or not at S117.

Description

Detailed Description of the Invention

[0001]

The present invention receives image data,
The present invention relates to an image processing device that processes input image data in units of segments obtained by dividing one page into a plurality of segments.

[0002]

2. Description of the Related Art Conventionally, a printer (for example, a bubble jet (BJ) printer) for forming one page of image information received from a host computer as an image composed of a plurality of segment units is used. The image processing apparatus for printing is configured as shown in FIG. As shown in this figure, the image data sent from the host computer 4 via the interface 12 and the external interface circuit 5 is stored in the CPU.
1 is written in the segment image memory 6. At this time, ROM2 is used to hold the program and RA
M3 is used as a work RAM for work. The image forming unit 8 is a BJ type printer that forms an image of segment image data obtained by dividing one page of image data into a plurality of segments on a recording medium, and an image signal read from the segment image memory 6. Image formation is performed based on 13. The address generator 7 generates a read address from the segment image memory 6 based on the synchronization signal 15 from the image forming unit 8.

Generally, the printing speed of a BJ type printer is high, and printing is performed at a constant speed while one segment is printed. Therefore, all the image data necessary for printing one segment is stored in a semiconductor memory ( SR
It is necessary to hold it in the high-speed image memory 6 composed of AM, DRAM, etc.

The segment image memory 6 has a capacity enough to hold image data corresponding to one segment, and by receiving image data from the host computer 4 and repeating printing for each segment forming one page, Form the image of the page.

However, in the above-mentioned conventional example, since the transfer and printing of the image data from the host computer is repeated for each segment constituting one page, the host computer is restrained until the printing of the image data for one page is completed. was there. Further, when printing the same page on a plurality of sheets, each segment has to be transferred a plurality of times, and there is a drawback that the transfer takes time. On the other hand, as a method of solving this drawback, the capacity of the segment image memory 6 is made to be able to hold one page of image data, and after one page of image transfer from the host computer, printing is performed for each segment. There is a method of repeating. However, this method has a drawback that it is expensive because the capacity of the segment image memory 6, which is a semiconductor memory, becomes large.

Apart from such a conventional example, an image processing apparatus for performing image processing as shown in the flowchart of FIG. 11 is known. Here, the recording medium will be described as a recording paper of a predetermined size.

The image processing apparatus receives PDL data, which will be described later, from the host computer via the external interface 5 (S101), and writes the data to the disk controller and hard disk controlled by the CPU (S102). S102 and S103 are repeated until data reception for one page is completed (S10
3). Substitute 1 for the variable n representing the segment number (S1
05), the PDL data is read from the hard disk 10, the CPU 1 develops the PDL data into raster image data for the nth segment, and writes the raster image data in the segment image memory 6 (S106). Output / image formation is performed from the segment image memory 6 to the image forming unit 8 for the nth segment (S107), and if not completed for all segments (S108), n is incremented by 1 (S1).
09), S106 and S107 are repeated, and when completed (S108), the recording paper is ejected from the image forming unit (S1).
10). If the output of the designated number has not been completed, S105
Return to step S101 when the process is completed (step S121). As a result, PDL reception, development, output, and image formation are performed.

[0008]

However, in the image processing apparatus having such a configuration, when printing a plurality of recording sheets, it is necessary to expand the PDL data every time one sheet is output, and therefore the PDL data is expanded. The disadvantage that the same development time as that of the first sheet is required for the second and subsequent sheets when there is a large amount of data, a large amount of PDL data that requires complicated development is included, or the PDL development performance of the CPU is low. was there.

It is therefore an object of the present invention to provide an image processing apparatus which overcomes the above-mentioned drawbacks and can output a plurality of sheets at high speed.

[0010]

In order to solve the above problems, an image processing apparatus according to the present invention is an image processing apparatus connected to an image forming unit for recording input image data on a recording medium. An image input unit for inputting image data, a rasterizing unit for rasterizing the input image data into raster image data, and image data consisting of a plurality of segments corresponding to at least one page or raster image data Image memory, a second image memory that holds a raster image composed of segments smaller than one page, and predetermined image data corresponding to a predetermined segment is called from the second image memory and transferred to the image forming unit. And a transfer means for performing the transfer.

[0011]

With this structure, when the number of pages of the image data output to the image forming unit is 1, after the input image data is recorded in the first image memory,
Further, the mode in which the image data is repeatedly transferred to the image forming unit in a segment unit and recorded on the recording medium, and the page number of the image data output to the image forming unit is at least 2
In this case, after the input image data is recorded in the first image memory, it is transferred in segment units to the second image memory, and further transferred from the second image memory to the image forming section by repeating recording. Since the mode of forming an image on the medium can be implemented, image data of a plurality of pages can be output at high speed.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

<First Embodiment> FIG. 1 is a block diagram for explaining the schematic arrangement of a color PDL-compatible image processing apparatus 50 and the flow of image data according to the first embodiment. The image processing device 50 is connected to the host computer 4 and the image forming unit 8.

As shown, the host computer 4 to the interface 12, the external interface circuit 5
The PDL data sent via the disk is written in the hard disk 10 by the CPU 1 via the disk controller 9 and the disk I / F 16. P for one page
When the DL data is arranged in the hard disk 10, when the number of output sheets is one, the CPU 1 reads the PDL data in the hard disk 10 little by little and develops raster image data in which one data corresponds to one pixel, Write to the segment image memory 6. The segment image memory 6 is a component memory 6-1 of Red, Green, and Blue,
6-2 and 6-3. The segment image memory 6 is a memory for holding a raster image corresponding to a segment which is a unit smaller than one page.
ROM2 is used to hold programs, RAM
Reference numeral 3 is a work RAM for work, and 11 is a CPU bus. On the other hand, the image forming unit 8 is a color printer that forms an image in units of segments. This type of scheme
A bubble-jet type printer (hereinafter referred to as BJ type), which is one type of inkjet type, is often used. B
In the J method, an image is formed on a sheet by using a print element 19 as shown in FIG. In the figure, the ink tank 23
The supplied ink is ejected from each nozzle 20 under the control of the ejection controller 21 and printed on an output medium (recording medium) such as paper. In the case of the image forming apparatus of this embodiment,
The number of nozzles is 128, and ejection or non-ejection is controlled for each nozzle. FIG. 3 shows a method of printing on the paper 24 using the print element 19. The print head 19 moves 128 pixels while moving in the x direction of the paper 24 as shown at 25, and prints in the same manner. This one
The area printed by one movement in the x direction is called a segment. The image of one page is composed of a plurality of segment images. A feature of the BJ method is that it is not possible to stop halfway while printing one segment.
However, since it is possible to stop between each segment, it is sufficient that the segment image memory 6 contains the raster image data necessary for printing one segment, and the capacity for one page is not required. As described above, since the image is formed in the image forming unit 8 in the unit of segment, all the processes are performed in the unit of segment. That is, for each segment forming one page, P from the hard disk 10
The DL data is read, rasterized, rasterized, and output to the image forming apparatus 8. By repeating this for all segments, one page of image is formed. When the number of output sheets is plural, the CPU 1 expands all the PDL data for one page stored in the hard disk 10 in the area for one output page secured in the hard disk 10 for a raster image. After that, for each segment forming one page, the raster image data for one segment is transferred from the hard disk 10 to the segment image memory 6, the raster image data is output from the segment image memory 6 to the image forming apparatus 8, and this is repeated. As a result, one-page image formation is performed. By repeating this for the output number of sheets, the output of the designated number of sheets is completed.

4 to 7 are diagrams for explaining PDL data. Abode Psoset
PDL (Page D) represented by the Script language
As shown in FIG. 4, the description language is an image description using a character code,
This is a language for combining and describing elements such as image description by graphic code and image description by raster image data, and the data described by this is PDL. FIG. 5 shows an example of the description by the character code. Reference numeral 1100 is a description for designating the color of characters, and the parenthesized order is Red and Green in order.
The brightness of n and Blue is shown. The minimum is 0.0 and the maximum is 1.0. In 1100, the character is designated to be black. Next, in 1102, the first and second parameters respectively indicate the x and y coordinates of the start position coordinates on the paper on which the character string is laid out, the third parameter indicates the character size, and the fourth parameter indicates the character spacing. The fifth parameter indicates the character string to be laid out. In short, 1102 is an instruction to lay out the character string “IC” with a size of 0.3 and an interval of 0.1 from the coordinates (0.0, 0.0).

FIG. 6 shows an example of description by a graphic code.
Like 1100, 1103 specifies the color of the line, and here, Red is specified. Next, 1104 is for designating a line. The first and second parameters are the viewpoint coordinates of the line, and the third and fourth parameters are the x and y coordinates of the end point coordinate, respectively. The fifth parameter indicates the line thickness.
FIG. 7 shows an example of description by raster image data. 110
In 5, the raster image data is assigned to the variable image1. Here, the first parameter represents the image type and the number of color components of the raster image, the second parameter represents the number of bits per component, and the third and fourth parameters respectively represent the image size of the raster image in the x and y directions. Represent The fifth and subsequent parameters are raster image data. The number of raster image data is the product of the number of color components forming one pixel and the image size in the x and y directions. Since the RGB image is composed of three color components (Red, Green, Blue) in 1105, the number of raster image data is 3 × 5 × 5 = 75.
It becomes an individual.

FIG. 8 shows how the graphic descriptions of FIGS. 5, 6 and 7 are interpreted and developed into raster image data on one page. R100, 101, and 102 are developed from the PDL data shown in FIGS. 5, 6, and 7, respectively. Here, the whole of FIG. 8 is a sheet of paper (reference numeral 2 in FIG. 3).
4), each segment 27-1, 27-
1, 27-3 and 27-4 correspond to the first to fourth segments in FIG. At this time, paying attention to the third segment, for example, when printing the third segment, the segment memory 6 includes only a part of R102 and a part of R101, and does not include R100. In such a case, the position information of each segment and each PDL can be ignored.
It can be determined from the layout position information in the data (1102, 1104, 1106). For example, since the y-coordinate of the third segment is in the range of 0.4 to 0.8, it overlaps 1104 and 1106, but does not overlap 1102.

The detailed operation of this embodiment will be described below with reference to the flow chart of FIG. First, in S101, PDL data is received from the host computer 4 one by one.
One unit may be one byte or one page, but may be a unit suitable for processing, for example, one line unit in FIGS.
Next, in S102, the received PDL data is written in the hard disk 10. At this time, in this embodiment, the data is written as it is, but it is also possible to perform the preprocessing of one copy and change the data format before writing. Next, in S103, P for one page
It is determined whether or not the DL data has been received, and if not, the process returns to S101. When the data for one page is complete, it is determined in S104 whether or not to output a plurality of sheets. Usually, the number of output sheets is included in the PDL data. If only one sheet is output, 1 is substituted for n in S105, and S106
The PDL data is read from the hard disk 10 and developed into a raster image for the nth segment. If the read PDL data is not related to the segment of interest, the next PDL data is read without expansion. When the raster image for the n-th segment is aligned with the raster image memory 6, the image forming unit 8 is activated in step S107 to form an image for one segment. Next, in S108, it is determined whether image formation has been completed for all the segments. If not completed, n is incremented by 1 in S109 and the next segment is processed. On the other hand, if the printing is completed, the print paper is discharged in S110 and the process returns to S101.

Next, when it is judged in S104 that plural sheets are output, all the PDL data stored in the hard disk 10 is read and expanded, and the expanded data is written in the hard disk 10. Next, in S112, 0 is substituted for p indicating the number of output pages, p is compared with the output designated number in S113, and if false, 1 is substituted for n in S114,
S11 stored in the hard disk 10 in S115
The portion included in the nth segment of the raster image data expanded in 1 is transferred from the hard disk 10 to the raster image memory 6. Next, in step S116, the image forming unit 6 is activated to form an image for one segment. next,
In S117, it is determined whether or not the image formation has been completed for all the segments, and if not completed, n is incremented by 1 in S118 and the next segment is processed. On the other hand, if completed, p is incremented by 1 in S119, the print paper is ejected in S120, and the process returns to S113. When it is determined in S113 that p is equal to the number of output sheets, the process returns to S101.

<Embodiment 2> In this embodiment, only the control software of the first embodiment is modified. Therefore, the configuration of the apparatus of this embodiment is similar to that of FIG. The flowchart of this embodiment is shown in FIG. 10, and the operation of the image processing apparatus will be described based on this.

First, in S201, PDL data is received from the host computer 4 one by one. 1 unit may be 1 byte or 1 page, but it is a unit suitable for processing,
For example, it may be one line unit in FIGS. Then S202
Then, the received PDL data is written in the hard disk 10. At this time, in this embodiment, the data is written as it is, but it is also possible to perform the preprocessing of one copy and change the data format before writing. Next, in S203, it is determined whether or not the PDL data for one page has been received, and if not received, the process returns to S201. When the data for one page is complete, all PDL data stored in the hard disk 10 is read and expanded, and the expanded data is written in the hard disk 10 (S204). Next, the time required to develop the PDL data for one page is measured (S205). The time required for the expansion is obtained by measuring the PDL expansion start time and the end time with a timer, a clock or the like inside the CPU 1 or connected to the CPU 1 and taking the difference. Next, the process A is executed (S206). In the process A, 1 is substituted for n in S216, and the portion included in the nth segment of the raster image data expanded in S204 stored in the hard disk 10 in S217 is transferred from the hard disk 10 to the raster image memory 6. Then S218
Then, the image forming unit 6 is activated to form an image for one segment. Next, in S219, it is determined whether image formation has been completed for all the segments, and if not completed, S220.
Then n is incremented by 1 and the next segment is processed. on the other hand,
If it is finished, the process A is finished. Next, in S207, S2
Similarly to the measurement of the PDL development time of 05, the transfer time of the raster image for one page from the hard disk 10 to the raster image memory 6 is measured. Then, the output page is discharged in S208, 1 is substituted for the variable p which means the output number in S209, and p is compared with the designated output number in S211. If they are equal, the process returns to S201, and if they are not equal, S2 is performed at S2.
The deployment time measured in 05 and the transfer time measured in S207 are compared. If the expansion time is long, the process A is executed in S213, and if the transfer time is long, the process B is executed in S214. In process B, n in S221
1 is assigned to, and in S222, the PD is read from the hard disk 10.
The L data is read and rasterized for the nth segment. If the read PDL data is not related to the segment of interest, the next PDL data is read without expansion. When the raster image for the n-th segment fits in the raster image memory 6, the image forming unit 8 is activated in step S223 to form an image for one segment. Next, in S224, it is determined whether image formation for all the segments is completed. If not completed, n is set to 1 in S225.
Increase and process the next segment. On the other hand, if it has ended, the process B is ended. Next, p is incremented by 1 and S211 is set.
Return to. By repeating this, one page is output and the output of the designated number of sheets is completed.

(Others) The present invention is provided with a means (for example, an electrothermal converter or a laser beam) for generating heat energy as energy used for ejecting ink, particularly in the ink jet recording system. The present invention brings about excellent effects in a recording head and a recording apparatus of the type in which the state of ink is changed by the heat energy. This is because such a system can achieve high density recording and high definition recording.

Regarding the typical structure and principle thereof, see, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740.
What is done using the basic principles disclosed in 796 is preferred. This method is a so-called on-demand type,
It can be applied to any of the continuous type, but especially in the case of the on-demand type, it can be applied to the sheet holding the liquid (ink) or the electrothermal converter arranged corresponding to the liquid path. By applying at least one drive signal corresponding to the recording information and giving a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal converter, and film boiling is caused on the heat acting surface of the recording head. Liquid (ink) corresponding to this drive signal in a one-to-one correspondence
It is effective because bubbles can be formed inside. Due to the growth and contraction of the bubbles, the liquid (ink) is ejected through the ejection opening to form at least one droplet. It is more preferable to make this drive signal into a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness can be achieved. As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise on the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge port, the liquid passage, and the electrothermal converter (the straight liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned specifications, US Pat. No. 4,558,333, US Pat. No. 4,558,333, which discloses a configuration in which a heat acting portion is arranged in a bending region.
The structure using the specification of No. 59600 is also included in the present invention. In addition, Japanese Unexamined Patent Publication No. 59-123670 discloses a configuration in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy is provided. The effect of the present invention is effective even if the configuration corresponding to the ejection portion is disclosed in JP-A-59-138461. That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

Furthermore, the present invention can be effectively applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium that can be recorded by the recording apparatus. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads or a configuration as one recording head integrally formed.

In addition, even in the case of the serial type as in the above example, the recording head fixed to the main body of the apparatus or the electrical connection with the main body of the apparatus and the ink from the main body of the apparatus by being attached to the main body of the apparatus. The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is integrally provided in the recording head itself is used.

Further, as the constitution of the recording apparatus of the present invention, it is preferable to add an ejection recovery means of the recording head, a preliminary auxiliary means and the like because the effect of the present invention can be further stabilized. Specifically, heating is performed by using a capping unit, a cleaning unit, a pressure or suction unit for the recording head, an electrothermal converter or a heating element other than this, or a combination thereof. Examples thereof include a preliminary heating unit for performing the discharge and a preliminary discharge unit for performing discharge different from the recording.

Regarding the type and number of recording heads to be mounted, for example, only one is provided corresponding to a single color ink, or a plurality of inks having different recording colors and densities are supported. A plurality of pieces may be provided. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but it may be either the recording head is integrally formed or a plurality of combinations may be used. The present invention is also extremely effective for an apparatus provided with at least one of full-color recording modes by color mixing.

In addition, in the above-described embodiments of the present invention, the ink is described as a liquid, but an ink that solidifies at room temperature or lower and that softens or liquefies at room temperature may be used. Or, in the inkjet system, it is common to control the temperature of the ink itself within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature so that the viscosity of the ink is within the stable ejection range. Sometimes, a liquid ink may be used. In addition, the temperature rise due to thermal energy is positively prevented by using it as the energy of the state change of the ink from the solid state to the liquid state, or in order to prevent the evaporation of the ink, it is solidified and heated in the standing state. You may use the ink liquefied by. In any case, by applying thermal energy such as ink that is liquefied by applying thermal energy according to the recording signal and liquid ink is ejected, or that begins to solidify when it reaches the recording medium. The present invention can be applied to the case where an ink having a property of being liquefied for the first time is used. In this case, the ink is
JP-A-54-56847 or JP-A-60-7
As described in Japanese Patent No. 1260, it may be configured to face the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as the form of the ink jet recording apparatus of the present invention, besides the one used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and a facsimile apparatus having a transmission / reception function It may be a form or the like.

[0031]

As described above, in the development / output of image data that needs to be expanded into raster image data, if there is only one output, the image data that needs to be expanded directly into raster image data. To raster image memory and output.If there are multiple outputs, once expand to hard disk, then transfer to raster image memory and output.
Alternatively, the raster image data expanded on the head disk 10 is stored, and the first image formation is output by repeating the transfer of the raster image data from the hard disk 10 to the raster image memory 6, and the second and subsequent images are raster image data. The image data that needs to be expanded into data or the raster image data that is transferred is selected as a method capable of outputting at high speed, and thus the method is output, so that higher speed output is possible when outputting a plurality of sheets.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining a schematic configuration of an image processing apparatus according to the present invention and a flow of image processing.

FIG. 2 is a perspective view for explaining the configuration of a BJ-type printer head that constitutes an image forming unit that is connected to an image processing apparatus according to the present invention to form an image.

FIG. 3 is a diagram for explaining the configuration of PDL.

FIG. 4 is a diagram for explaining a description example of PDL.

FIG. 5 is a diagram for explaining a description example of PDL.

FIG. 6 is a diagram for explaining a description example of PDL.

FIG. 7 is a diagram for explaining a description example of PDL.

FIG. 8 is a diagram for explaining an image formed based on PDL.

FIG. 9 is a flowchart for explaining the flow of image processing in an embodiment of the image processing apparatus according to the present invention.

FIG. 10 is a flowchart for explaining the flow of image processing in the second embodiment of the image processing apparatus according to the present invention.

FIG. 11 is a flowchart for explaining the flow of image processing in the second example of the conventional image processing apparatus.

FIG. 12 is a block diagram for explaining a schematic configuration of a first example of a conventional image processing apparatus and a flow of image processing.

[Explanation of symbols]

 1 CPU (means for development, transfer and measurement) 2 ROM Means for development and measurement 3 RAM (means for development and measurement) 4 Host computer (image input means) 5 External interface (image input means) 6 segment image memory (second image memory) 7 address generator (transfer means) 8 image forming unit 9 disk controller 10 hard disk (first image memory)

Claims (10)

[Claims] 1. An image processing apparatus connected to an image forming unit for recording input image data on a recording medium, comprising: an image input unit for inputting the image data; and a raster image for the input image data. A rasterizing means for rasterizing the data, a first image memory for storing the image data or the raster image data composed of a plurality of segments corresponding to at least one page, and a raster image composed of segments less than the one page A second image memory that holds the image data, and a transfer unit that calls predetermined image data corresponding to a predetermined segment from the second image memory and transfers the image data to the image forming unit. Processing equipment. 2. The image processing apparatus according to claim 1, wherein when the number of pages of the image data output to the image forming unit is 1, after the input image data is recorded in the first image memory. , A mode in which image data is repeatedly transferred to the image forming unit in units of segments and recorded on the recording medium, and when the number of pages of the image data output to the image forming unit is at least 2, After the input image data is recorded in the first image memory, it is transferred in segment units to the second image memory, and the transfer from the second image memory to the image forming unit is repeated to perform recording. An image processing apparatus having a mode of forming an image on a medium. 3. The image processing apparatus according to claim 1, wherein a time required for expanding the input image data for one page into the raster image data by the expansion means and 1
An image processing apparatus comprising: a measuring unit for measuring a time required to transfer the raster image data for one page to the second memory. 4. The image processing apparatus according to claim 3, wherein the input image data and the raster image data are stored in the first image memory, and a development time from the input data to the raster image data is measured. However, when outputting one page of image data, the image data is output for each segment forming the raster image data from the first image memory for a plurality of segments forming the one page. By repeating the transfer to the image forming unit via the second image memory, the image for one page is formed on the recording medium, and the raster image data for one page is provided for the first image. A first recording mode for measuring the transfer time from the memory to the second image memory, and at least two pages of image data When outputting, the development time and the transfer time are compared, and when the transfer time is shorter, the first recording mode is executed, and when the development time is shorter, the first image memory is used. By expanding the stored input image data for a plurality of segments forming one page in the second image memory and then transferring the image data to the image forming unit, the image of the one page is recorded on the recording medium. An image processing apparatus characterized by forming. 5. The image processing apparatus according to claim 1, wherein the input image data that needs to be expanded into the raster image data is PDL. 6. The apparatus according to claim 1, wherein the input image data that needs to be expanded into the raster image data is compressed image data, and the input image data is converted into the raster image data. An image processing apparatus, wherein the image data is expanded by decompression into image data in a state before the compression. 7. The image processing apparatus according to claim 1, wherein the second image memory is a semiconductor memory and the first image memory is a non-semiconductor memory. apparatus. 8. The image processing apparatus according to claim 7, wherein the non-semiconductor memory is a magnetic disk memory. 9. The image processing apparatus according to claim 7, wherein the non-semiconductor is a magneto-optical disk memory. 10. The image processing apparatus according to claim 1, wherein the image forming unit uses thermal energy to generate bubbles in the ink due to a film boiling phenomenon, thereby generating the bubbles. An image processing apparatus, which is a bubble-jet printer that discharges ink based on the original image.