JPH0774918A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain an image of an original without damaging mutual relation in the case of an original in which an original image omission is excluded and a diagram or the like. CONSTITUTION:This image forming device is provided with an original reading means 203 for reading out the image of an original, an image memory 201a for storing the read image data, an original size detecting means 202 for detecting the size of the original, and a paper feeding means for storing and feeding recording paper with prescribed size. When an original size detecting means 202 detects that the original size is larger than the prescribed size of recording paper and when an image recognizing means 201b for recognizing existence of an image on the center part of the original recognizes the existence of an image on the center part, a picture processing means 205 reduces the image of the original, and at the time of recognizing that no image exists on the center part, devices the image of the original into two parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a laser printer, a facsimile machine, and more specifically, a document of a predetermined size is recorded on a recording paper of a predetermined size by dividing it into two parts. The present invention relates to an image forming apparatus that selectively executes division processing and reduction processing according to the presence or absence of an image in the central portion of a document.

[0002]

2. Description of the Related Art First, the background of the technology according to the present invention will be described. In the office environment, there are many documents of different sizes, and the documents are bound and bound in files and stored / stored in a desk, a cabinet, or the like. Generally, private companies use A4 size or A3 size.
Many A size documents such as size are used. On the other hand, in public offices, B size documents are often used for reasons such as laws and ministerial orders. Thus, in the past, A
Documents of size B and B were mixed, and the work of storing and managing the documents became troublesome.

Under these circumstances, the government has recently planned to unify the document sizes, and newly created documents will be based on the uniform size (A size) in the future. However, the already created document is stored as a B5 size original, and if a copying machine is used to copy this document, it is generally B.
It is to be copied on 5 size recording paper. A recent copying machine has a function of detecting a document size, automatically selecting a recording sheet that matches the document size, and forming an image on the fed recording sheet. In such a copying machine, forming an image on a recording sheet having a size different from the size of the original makes the operation rather complicated. Further, in a copying machine that does not have such a function, when recording sheets of a plurality of sizes are set, the operator often selects the recording sheet of the same size as the original. Therefore, in order to unify the document sizes in the office, a copier that can set only recording paper of a predetermined size is required.

As one means for solving such a problem, it is known that a large original is divided into two and copied. For example, as a reference technical document related to the present invention, there is a "copying method" disclosed in Japanese Patent Application Laid-Open No. 60-146255. This is for a large size manuscript
This is a continuous page copying method of recording on a small-sized recording sheet. In this copying method, when the book is opened and the pages are recorded on separate recording sheets, the image originally contained in each page is recorded, so that it is effective when there is no image in the center. Become.

[0005]

However, in the conventional copying method as described above, for example, an A3 size original as shown in FIG. When the image is divided into two and printed in A4 size, there is a problem that image information is lost in that portion because there is an image in the central portion. In particular, when the original images are related to each other as in the case of a chart or the like, there is a problem that the visibility is rather deteriorated by dividing even if the image is not lost.

The present invention has been made in view of the above, and when a document of a predetermined size is divided and recorded on a recording sheet of a predetermined size, the loss of the document image is eliminated, and In the case of manuscripts, the purpose is to obtain images that do not impair their mutual relationship.

[0007]

In order to achieve the above object, the present invention comprises a document reading unit for reading a document image,
An image forming apparatus having an image data storage unit for storing image data read by the document reading unit, a document size detecting unit for detecting a size of a document, and a sheet feeding unit for accommodating and feeding a recording sheet of a predetermined size. In the above, the image recognition means for recognizing the presence or absence of an image in the central portion of the original when the original size detected by the original size detecting means is larger than the recording paper of a predetermined size, and the image recognizing means forms an image in the central portion of the original. It is an object of the present invention to provide an image forming apparatus including an image processing unit that reduces an original image when it is recognized as being present and divides the original image when it is recognized that there is no image in the central portion of the original.

Further, a document reading unit for reading a document image, an image data storage unit for storing the image data read by the document reading unit, a document size detecting unit for detecting the size of the document, and a recording paper of at least a predetermined size. An image forming apparatus having a sheet feeding means for storing and feeding sheets in the vertical and horizontal directions, when the document size detected by the document size detecting means is larger than a recording sheet of a predetermined size, the image of the central portion of the document is Image recognition means for recognizing presence / absence, and image processing for reducing a document image when the image recognition means recognizes that there is an image in the center portion of the document, and for dividing the document image when it is recognized that there is no image in the center portion of the document Means and a control means for selecting the recording paper corresponding to the image of the reduction processing and the division processing by the image processing means by controlling the paper feeding means There is provided an image forming apparatus equipped.

The recording paper is of A size.

The image processing means rotates the image in accordance with the direction of the recording paper on which the original image is printed.

[0011]

In the image forming apparatus according to the present invention, when the document size detecting means detects that the document size is larger than the recording paper of a predetermined size, the image recognizing means recognizes the presence or absence of an image in the central portion of the document, As a result, the image processing means reduces the original image when it recognizes that there is an image in the central portion of the original, and conversely divides the original image when recognizing that there is no image in the central portion of the original.

Further, in the image forming apparatus according to the present invention, when the document size detecting means detects that the document size is larger than the recording paper of a predetermined size, the image recognizing means recognizes the presence or absence of the image in the central portion of the document. As a result, the image processing means reduces the original image when it recognizes that there is an image in the central portion of the original, and divides the original image when it recognizes that there is no image in the central portion of the original. At this time, at least the recording paper of a predetermined size is accommodated in the paper feed means in the vertical and horizontal directions, and the control means supplies the paper feed means with the recording paper corresponding to the image of the reduction processing and the division processing by the image processing means. Selectively feed paper.

[0013]

Embodiments of the image forming apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing a schematic configuration of an image forming apparatus to which the present invention is applied. This apparatus is integrally configured of an image forming system 110 to which a general laser writing means is applied and an image reading apparatus (hereinafter referred to as an image scanner) 100, and an image is formed on an upper portion of the image forming system 110. It has a connection structure on which the scanner 100 is placed.

In FIG. 1, the image scanner 100
Is configured as follows. Reference numeral 101 denotes a contact glass on which a document 102 is placed, 103 denotes light irradiation on the document 102 on the contact glass 101, obtains reflected light according to an image of the document 102, and guides the reflected light to a reading sensor 104. It is an exposure illumination unit composed of an exposure lamp for forming an image, a mirror, a lens, and the like. Also,
A reading sensor 104 uses a CCD image sensor.

The image forming system 110 is constructed as follows. That is, it mainly comprises a laser writing system, an image forming system, and a paper feeding and conveying system. The laser writing system is
In this device, it is housed in a laser writing unit indicated by 120. The laser writing unit 120 includes a laser output unit (not shown), a laser diode that is a laser light source inside the laser output unit, and a polygon mirror that rotates at a high speed and a constant speed by a motor. It is equipped. Further, the laser light output from the laser writing unit 120 is applied to the photoconductor drum 130 equipped in the image forming system via the polygon mirror and the mirror.

The image forming system is constructed as follows. That is, around the photosensitive drum 130,
A charging roller 131 that uniformly charges the surface of the photoconductor drum 130, a developing unit 132 that visualizes the formed electrostatic latent image, and a photoconductor drum 1 on the conveyed recording paper.
30 transfer roller 1 for transferring the toner image formed on the surface
33, and a cleaning unit 134 for cleaning the surface of the photosensitive drum 130 after the transfer process. A beam sensor (not shown) that generates a main scanning synchronization signal is arranged at a position near one end of the photosensitive drum 130 where the laser beam is emitted.

The paper feeding / transporting system is constructed as follows. That is, 135 and 136 are paper feed cassettes for loading recording papers of different sizes, 137 and 13 respectively.
Reference numeral 8 is a paper feed roller that feeds the recording paper from the paper feed cassettes 135 and 136, 139 and 140 are recording paper size detection sensors that detect the size of the recording paper, and 141 is a predetermined timing for transferring the recording paper to the transfer portion. Registration rollers to convey, 14
Reference numeral 2 is a fixing unit for fixing the image on the recording paper conveyed through the transfer process, 143 is a paper discharge roller, and 144 is a paper discharge tray for receiving the discharged recording paper.

Next, the basic operation of the image scanner 100 will be described. The original 102 set at a predetermined position on the contact glass 101 is the exposure illumination unit 1
It is exposed and illuminated by 03, and is guided to the reading sensor 104 as reflected light according to the image. After that, the reading sensor 104
Thus, the original image is read line by line.

The basic operation of the image forming system 110 will be described. The surface of the photosensitive drum 130 is uniformly charged to a high potential by the charging roller 131. When the surface of the photoconductor drum 130 is irradiated with the laser light, the potential of the irradiated portion decreases. Since the laser beam is ON / OFF controlled according to the black / white of the recording pixel, the potential distribution corresponding to the recorded image, that is, the electrostatic latent image is formed on the surface of the photosensitive drum 130 by the irradiation of the laser beam.

When the portion on which the electrostatic latent image is formed passes through the developing unit 132, toner adheres according to the level of the potential, and a toner image is formed by visualizing the electrostatic latent image. On the other hand, the registration roller 141 conveys the recording paper to the portion where the toner image is formed at a predetermined timing, and the recording paper overlaps the toner image. After this toner image is transferred onto the recording paper by the transfer roller 133, the recording paper is separated from the photosensitive drum 130. The separated recording paper is conveyed through a conveyance path, thermally fixed by a fixing unit 142 including a heat roller and a pressure roller having a heater, and then ejected onto a paper ejection tray 144 by a paper ejection roller 143. To be done. After the transfer process is completed, the surface of the photoconductor drum 130 is cleaned by the cleaning unit 134, and the standby state is prepared for the next copy process.

On the other hand, the recording paper in the paper feed cassette 135 (136) is fed in a predetermined direction by a paper feed roller 137 (138). The fed recording paper is temporarily stopped in a state of being in contact with the registration rollers 141, skewed (obliquely conveyed) is corrected, and then conveyed to the transfer portion of the photosensitive drum 130 at a timing synchronized with the progress of the recording process. To be done.

FIG. 2 is a block diagram showing a schematic configuration of a control system of the image forming apparatus according to the present invention.
Reference numeral 01 is a control unit that executes control of the entire image forming apparatus based on a control program, and particularly when the read image data is temporarily stored in the image memory 201a and the document size is larger than a recording sheet of a predetermined size. Image recognition means 201 for recognizing the presence or absence of an image in the central portion of the document
It is configured by a microcomputer system including b and the like. Note that the image recognition means 201b may be of a type that determines the presence or absence of an image in the central portion of the read image, or detects the presence or absence of an image in the central portion of the document by an external detection means using an optical sensor. .

Further, 202 is a document size detecting means for detecting the size of the document 102 placed on the contact glass 101, 203 is a document reading means (image scanner 100 in FIG. 1) for optically reading the document, and 204 is Recording paper size detecting means for detecting the size of the recording paper (see FIG.
Paper size detection sensors 139, 140), 2
Reference numeral 05 is an image processing means for applying a predetermined process to the read image data, and 206 is an image output means for outputting an image signal according to the image data after the image processing to the laser writing unit 120.

Next, the operation will be described. A4 size recording paper is set in the paper feed cassette 135 in the vertical direction, and A4 size recording paper is set in the paper feed cassette 136 in the horizontal direction. For example, an A4 size document 10
When performing the copying process of No. 2, the exposure illumination unit 103
Original 102 placed on contact glass 101 by
Is illuminated, and at this time, the document size detecting means 202 detects that the document size is A3. The control means 201 inputs an information signal indicating that the size of the original 102 is A3, and further, a paper feed cassette 135 in which A4 size recording paper is set according to the presence or absence of an image in the central portion of the original 102. Alternatively, 136 is selected. As a result, an image is formed on the recording paper that matches the half size of the original 102 through the series of image forming processes described above.

Further, the operation will be specifically described with reference to FIG. FIG. 3A shows an example of copy processing for an original having no image in the central portion, and FIG. 3B shows an example of copy processing for an original having an image in the central portion.

When an A3-size original 102 is set on the contact glass 101, the exposure illumination unit 103
The original size detection unit 202 detects that the original size is A3, and the control unit 201 recognizes that the original size is A3. Further, since the control unit 201 is configured such that the entire area of the A3 size original 102 cannot be set horizontally on the contact glass 101 as in the present embodiment, the original 102 is oriented in the vertical direction. Automatically recognize that.
The same applies to the B4 size.

Further, in the present embodiment, the processing differs depending on whether there is no image in the central portion of the original 102 or when there is an image in the central portion of the original 102. First, the manuscript 10
2 is read by the exposure illumination unit 103 once to read the entire image, and is temporarily stored in the image memory 201a. Further, in parallel with this reading operation, the size of the original 102 is detected by the original size detecting means 202, and the original 1
A size of 02 is recognized. After that, when it is determined that the original 102 is larger than the A4 size, the original 102
Whether or not there is an image in the central portion of is also judged by the image recognition means 201b, and the following processing is executed by the control means 201 and the image processing means 205.

That is, the original 10 larger than A4 size
2 and if there is no image in the center,
As shown in FIG. 3A, the image processing unit 205 divides the original 102 into a left page and a right page, and forms an image on each A4 recording sheet. On the contrary, as shown in FIG. 3B, when the original 102 is larger than A4 size and there is an image in the central portion, the image processing unit 205 reduces the image to A4 size.
Image on the recording paper.

FIG. 4 is an explanatory view showing another embodiment of the image forming apparatus to which the present invention is applied. This configuration is shown in Figure 1.
In addition to the image forming apparatus shown in FIG.
1 and a double-sided sheet feeding device 410 are added. Therefore, the parts other than the automatic document feeder 401 and the double-sided paper feeding device 410 are designated by the same reference numerals as those shown in FIG.

The automatic document feeder 401 is mounted on the upper part of the contact glass 101 and has the following structure. That is, in the figure, 402 is a document table on which a plurality of documents 102 can be set, 403 is a document feeding roller that feeds and conveys the documents 102 one by one, and 404 is a contact and contact surface of the contact glass 101 to convey the documents. Endless conveyor belts 405 and 406 are belt drive rollers that stretch and rotate the conveyor belt 404 from the inside.
Reference numeral 407 is a document discharge table for discharging the document 102 after the reading process.

The double-sided sheet feeding device 410 is provided between the image forming system and the sheet feeding cassette 136, and is constructed as follows. That is, in the figure, 411 is a conveyance path switching claw which is provided immediately after the fixing unit 142 and switches the recording sheet between the discharge path and the double-sided conveyance path based on the switching signal from the control means 201. A solenoid-operated switching mechanism (not shown) operates on the basis of a switching signal from the control means 201. Also, 4
Reference numeral 12 denotes a double-sided conveyance path for reversing the recording paper, which is configured to turn and guide the recording paper to the double-sided paper feeding device 410. That is, the transport path from the transport path switching claw 411 to the double-sided sheet feeding device 410 is S-shaped. Also, 41
3 is a double-sided paper feed roller.

Next, the operation will be described. When a copy start command is issued, the document feed roller 403 rotates, and the documents 102 set on the document table 402 are fed one by one. Next, the original 102 is conveyed to a predetermined position on the contact glass 101 by the conveyor belt 404 and stopped. In this state, the original 1
After the image is read from 02, the conveyor belt 404 is set to 1
The document is discharged to the document discharge table 407 by rotating 80 °. Further, the image read at this time is formed on the recording paper and fixed as in the image forming process described in FIG.

After that, since the conveyance path of the recording paper has been switched to the double-sided conveyance path 412 side (the position of the broken line) by the conveyance path switching claw 411, the recording paper is reversed to the double-sided sheet feeding device 410 via the double-sided conveyance path 412. In this state, the paper is immediately re-fed, and passes through the transfer unit without executing image formation. At this time, since the transport path switching claw 411 is at the position shown by the solid line, the recording sheet faces the image side, and the discharge tray 14
The paper is discharged to 4. That is, face-down paper ejection is performed by using the double-sided paper feeding device 410.

The above operation will be described in more detail. For example, as shown in FIG. 3A, an A3 size original 102
(There is no image in the center), but the automatic document feeder 401
When one sheet is set on the original 102, the original 102 is read by the above operation and temporarily stored in the image memory 201a in the control means 201. Then, first, of the read document images, the image on the left page is the image output means 20.
6 and is written on the surface of the photosensitive drum 130 via the laser writing unit 120. After that, through the copying process as described above, an image is formed on the recording paper of the left page as shown on the right side of FIG. Therefore, as a result, an image with the trailing end side in the transport direction as a reference is formed on the A4 size recording sheet. Then, the recording paper is discharged as it is to the paper discharge tray 144 with the image facing upward (face up).

Next, the second copying process is executed. First, the image on the right page from the image output means 206 is
Photosensitive drum 130 via laser writing unit 120
Written on the surface. Then, through the series of copying processes, an image is formed on the recording paper as shown on the right page of the right side of FIG. At this time, as for the image position of the recording paper, as shown in FIG. 3A, an image with the leading end side in the transport direction as a reference is formed on the recording paper of A4 size horizontal. Therefore, when it is desired to bind the recording sheets and view the image of the left page and the image of the right page in a two-page spread, face-down sheet discharge may be performed with the image of the right page facing downward.

That is, after fixing the recording paper on which the image of the right page is formed, the conveyance switching claw 411 is operated to the position shown by the broken line to guide the recording paper to the double-sided conveyance path 412 and to the double-sided paper feeding device 410. Store once and re-feed immediately. Further, at this time, without performing image formation, the image is faced downward onto the sheet ejection tray 144 with the image surface facing downward, and the sheet is ejected. As a result, the recording paper obtained at the first time and the recording paper obtained at the second time are ejected with the image surfaces aligned with each other. By binding in this state, the left-sided page You can see the image and the image on the right page.

On the other hand, as shown in FIG. 3B, when an image exists in the central portion of the original 102, the recording paper of A4 size is recorded by using the normal path without performing the above-mentioned recording paper reversal control. The image is reduced to and output.

In this embodiment, the recording paper is reversed and discharged,
The so-called face-down sheet discharge is performed using the double-sided sheet feeding device 410. However, in addition to this, a normally-used reverse sheet discharging device (reverse stacker) can be used to perform the processing at a higher speed. it can.

In the above embodiment, the case where the number of originals 102 (there is an image in the central portion) is one has been described.
A case where a plurality of originals 102 are set on the original table 402 will be described. However, in this case, it is assumed that the image is present only on one side of the original 102 or the image to be copied is present on only one side. The image of the left page (first image) of the first original 102 is formed in the same manner as described above. Next, the image on the right page (second image) is formed on a recording sheet, then stored in the double-sided sheet feeding device 410, and is in a standby state at this position. After that, manuscript 1
When the first sheet of No. 02 is discharged, the second original 10
2 is fed.

When the second original 102 (second original) is read, the second recording paper in the standby state is re-fed from the double-sided paper feeding device 410, and the first image of the second original becomes The data is recorded on the back side of this second sheet of recording paper. The image formation at this time is performed by the same method as in the case of the first image of the first sheet. Hereinafter, the same processing is repeatedly executed for the number of originals 102. As a result, the recording paper discharged onto the paper discharge tray 144 can be taken out and bound as it is, and a book-type copy can be obtained. In addition,
In this case, it is assumed that A4 horizontal recording paper is set in the paper feeding unit.

FIG. 5 is a flow chart showing the operation of image processing according to this embodiment. In the figure, first, it is determined whether or not the size of the document 102 is smaller than A4 by the detection of the document size detection means 202 (S501). In step S501, the size of the original 102 is A4.
If it is determined that the image size is larger, the image recognition unit 201b further determines whether or not there is an image in the central portion of the document 102 (S502). If it is determined in step S502 that there is no image in the central portion of the original 102, the image is divided into two (S503), A4 horizontal recording paper is selected, and paper is fed (S504). Printing processing is executed according to the image forming process (S50).
5).

On the contrary, in step S501,
When it is determined that the size of the original 102 is smaller than A4, the printing process is executed with the size as it is (S50).
5). In step S502, the original document 10
When it is determined that the image exists in the central portion of 2, the image is reduced (S506), A4 vertical recording paper is selected, and the paper is fed (S507), and the series of image forming processes described above is performed. Therefore, the printing process is executed (S505).

By the way, in the embodiment shown in FIG. 4, if A4 lengthwise recording paper is set in the paper feed unit, A
The direction of the printed image differs by 90 ° between the case where the three-size original 102 is reduced and the case where it is divided into two. Therefore, in this case, it is necessary to perform a process of rotating the image by 90 ° when the image is divided into two.

FIG. 6 is a flow chart showing the operation of image rotation processing. In the figure, first, it is determined whether or not the size of the original 102 is smaller than A4 by the detection of the original size detecting means 202 (S601). If it is determined in step S601 that the size of the original 102 is larger than A4, the image recognition unit 201b is further operated.
Thus, it is determined whether or not there is an image in the central portion of the original 102 (S602). In this step S602,
If it is determined that there is no image in the central portion of the original 102, the image is divided into two (S603) and the image is further divided into 90 parts.
The image is rotated (S604), and the printing process is executed according to the series of image forming processes (S605).

On the contrary, in step S601,
When it is determined that the size of the original 102 is smaller than A4, the printing process is executed with the size as it is (S60).
5). In step S602, the original document 10
When it is determined that the image exists in the central portion of 2, the image is reduced (S606), and the printing process is executed according to the series of image forming processes (S605). In addition,
On the contrary, in the above, when the recording paper is set in the A4 landscape, the image is rotated by 90 ° when the image is reduced.

In the present embodiment, the image forming apparatus is described as a copying machine, but the same processing can be executed not only in the copying machine but also in the image output of a laser printer or a facsimile machine. For example, when only A4 size recording paper is stored in the device, or
When recording paper of a size larger than that cannot be used, or when image data of A4 size or larger is input online or offline, the image output may be executed in two pages as in this embodiment.

By the way, as a document placing system of the copying machine,
There are two methods, a center reference method in which the original 102 is distributed to the center of the contact glass 101, and a corner reference method in which the front side of the contact glass 101 is used as a reference. In the present embodiment, the case of the corner reference method has been described as an example, but the center reference method can be similarly applied.

Further, in this embodiment, the image of the entire original 102 is read at a time, and the image memory 20 of the control means 201 is read.
The read image data is accumulated and image processed in 1a. For example, in the case of FIG. 3A, first, the left page is read, and then the right page is read.
The same process may be executed by reading the data in two steps.

[0049]

As described above, according to the image forming apparatus of the present invention, when the document size is larger than the recording paper of a predetermined size, the presence or absence of the image in the center part of the document is recognized and the center part of the document is recognized. When it is recognized that an image exists, the original image is reduced, and when it is recognized that there is no image in the central portion of the original, the original image is divided into two. Therefore, an original of a predetermined size is printed on a recording paper of a predetermined size. When dividing and printing, it is possible to eliminate omissions of original images and, in the case of originals in figures and tables, obtain images that do not impair their mutual relationship.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an image forming apparatus to which the present invention is applied.

FIG. 2 is a block diagram showing a schematic configuration of a control system of the image forming apparatus according to the present invention.

FIG. 3 is an explanatory diagram showing an example of image processing according to the present invention.

FIG. 4 is an explanatory diagram showing another schematic configuration of an image forming apparatus to which the present invention is applied.

FIG. 5 is a flowchart showing an operation example of image processing according to the present invention.

FIG. 6 is a flowchart showing an operation of image rotation processing according to the present invention.

[Explanation of symbols]

201 control means 201b image recognition means 202 original size detection means 203 original reading means 204 recording paper size detection means 205 image processing means

Claims (4)

[Claims] 1. A document reading unit for reading a document image, an image data storage unit for storing image data read by the document reading unit, a document size detecting unit for detecting the size of a document, and a recording paper of a predetermined size. In an image forming apparatus having a sheet feeding means for accommodating and feeding a sheet, image recognition for recognizing the presence or absence of an image in a central portion of an original when the original size detected by the original size detecting means is larger than a recording sheet of a predetermined size. And image processing means for reducing the original image when the image recognizing means recognizes that there is an image in the central portion of the original and dividing the original image when recognizing that there is no image in the central portion of the original. A characteristic image forming apparatus. 2. A document reading unit for reading a document image, an image data storage unit for storing image data read by the document reading unit, a document size detecting unit for detecting the size of the document, and a recording paper of at least a predetermined size. An image forming apparatus having a sheet feeding means for storing and feeding sheets in the vertical and horizontal directions, when the document size detected by the document size detecting means is larger than a recording sheet of a predetermined size, the image of the central portion of the document is Image recognition means for recognizing presence / absence, and image processing for reducing a document image when the image recognition means recognizes that there is an image in the center portion of the document, and for dividing the document image when it is recognized that there is no image in the center portion of the document And a control means for controlling the paper feeding means to select a recording paper corresponding to the image of the reduction processing and the division processing by the image processing means. An image forming apparatus comprising: 3. The image forming apparatus according to claim 1, wherein the recording paper has an A size size. 4. The image forming apparatus according to claim 1, wherein the image processing unit rotates the image according to the direction of the recording paper on which the original image is printed.