JPH04183064A - Image forming device - Google Patents

Abstract

PURPOSE:To improve efficiency for processing business by enlarging the applied range of image formation by controlling the selection of the output of synthesizing comment information to the front side or rear side of a recording paper sheet. CONSTITUTION:A copy operation command inputted from a manipulator 400 outputs various commands for operating other units at prescribed timing so that a copy processing as commanded can be executed by a system controller 302. Since it is controlled to synthesize the comment information on the both front and rear sides of the recording paper sheet, the comment information is synthesized on the both front and rear sides of the recording paper sheet by one original read processing although it is conventionally necessary to execute the copy synthesizing operation twice when trying to synthesize the comment information onto the rear side as well. Thus, since the applied range of image formation is enlarged by controlling the selection for synthesizing the comment information to the front side or rear side of the recording paper sheet, efficiency for processing business can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus that can be applied to digital copying machines, facsimile machines, laser printers, etc. The present invention relates to an image forming apparatus that can be used.

[Conventional technology]

Conventionally, it is generally known that, for example, a technique for outputting comment information other than manuscript information in a composite manner on a part of recording paper in a copying machine (for example, Japanese Patent Laid-Open Nos. 56-94376 and 1-204037) Public bulletin).

[Problem to be solved by the invention]

However, in the above-mentioned conventional technology, in order to output comment information on the back side of the recording paper as well, the recording paper on which the original image information has been copied on the front side is fed into the copying machine using a manual feed mechanism or other means, and then the recording paper is fed into the copying machine again. There is a problem in that the document screen information must be read, and the same operation as that for copying the front surface of the recording paper is required, resulting in a decrease in office processing efficiency.

Furthermore, it has been impossible with conventional copying machines to output the comment information that is synthesized and output on the back side of the recording paper as a mirror image. However, some comment information cannot be used for its purpose unless it is combined and output on the front and back sides. for example,
As for the paper folding position indication symbol, when the recording paper becomes large such as AO-A3, it becomes necessary to provide two types of paper folding symbols: inward folding and outward folding. In other words, depending on the folding method, when folding inward, the outward folding position indicator may be hidden in the folded recording paper, so the inward folding is on the front side and the outward folding is on the back side. It is necessary to synthesize and output the symbols separately.

The present invention has been made in view of the above, and includes selectively controlling the composite output of comment information to the front or back side of the recording paper, and further selectively controlling the composite output of the comment information to a normal image or a mirror image. The purpose is to expand the range of applications of image formation and improve the efficiency of office processing.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a reading means for reading original image information, a first storage means for storing the original image information read by the reading means, and a writing/reading method for the first storage means. a first control means for controlling additional image information; a second storage means for storing additional image information; a second control means for controlling writing/reading of the second storage means; An image forming apparatus comprising a copying means for copying original image information onto one side or both sides of recording paper; and a composition output means for combining and outputting the additional image information with the original image information, wherein the additional image information is copied onto the recording paper. a first selection means for selectively and synthetically outputting one side or both sides of the image; and a second selection means for selectively and synthetically outputting the additional screen information as a normal image or a mirror image.
The present invention provides an image forming apparatus equipped with a selection means.

[Function] The present invention selectively controls and outputs the composite output of comment information on the front or back side of the recording paper, and further selectively outputs the comment information as a normal image or a mirror image.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the mechanical structure of the reading device 100.
When an operator inserts a document into the roller 101, the document is conveyed in the sub-scanning direction between the contact glass 102 and the reflective plate 103 as the roller 101 rotates. During this conveyance, the surface of the document is scanned in the horizontal scanning direction by light from the fluorescent lamp 104.

The reflected light passes through the lens 105 to a photoelectric conversion element (CCD).
An image is formed on 106, and document information is read.

FIG. 2 shows an image information storage device 300 and a copying circuit 5, which will be described later.
00 and an operating device 400 are incorporated therein, the laser light emitted by the laser diode is reflected by a rotating polygon mirror 211, passes through a polygon mirror correction cylindrical lens 212, f-θ
It passes through the lens 213 and is reflected by the first mirror 214, the second mirror 215, and the third mirror 216, and the photosensitive drum 2
17 is imaged and irradiated. The rotating polygon mirror 211 is fixed to a polygon drive motor 218 and a rotating shaft 219, and the polygon drive motor 218 rotates at a constant speed to rotate the polygon mirror 2.
11 is driven to rotate.

The surface of the photosensitive drum 217 is negatively charged by a charger 240 connected to a negative high voltage generator. Based on the digitally recorded image information, the emitted laser light forms an electrostatic latent image on the surface of the photoreceptor drum 217, and the developing unit 220 develops the electrostatic latent image into a visible image.

On the other hand, three rolls of recording paper 221 are selected, fed out by the paper feeding operation of the delivery roller 222, and cut into the cutter 2.
After being cut to a predetermined size at 23, the registration roller 2
24 at a predetermined timing, and the transfer device 22
50 action, the toner image is transferred onto the recording paper 221. The recording paper 221 on which the toner image has been transferred is sent to a thermal fixing unit 226, and the recording paper 221 with the toner fused thereon is discharged to a paper discharge tray 227. Alternatively, the branch claw 228 switches to guide the recording paper 221 in the direction of the reversing unit 229 opposite to the direction of the paper discharge tray 227.

The recording paper 221 guided toward the reversing unit 229 by the branch claw 228 is conveyed via a guide plate (not shown) and inserted into the reversing unit 229. Here, an optical sensor 230 disposed near the inversion unit entrance
It is detected that the recording paper 221 has completely entered the reversing unit 229, and the reversing unit drive motor (not shown) rotates based on the detection signal from the optical sensor 230, and the recording paper 221 is conveyed to the registration roller 224. Then, the same copying process as above is executed and the paper is discharged to the paper discharge tray 227.

Here, the reversing unit 229 used in this embodiment
The reversing operation causes the recording paper 221 to switch bank as shown in FIG. In this operation, if the numbers 1, 2, 3, 4 shown in FIG.
As shown in FIG. 7(b), the characters 1, 2, 3, and 4 copied by surface copying match in the main scanning direction but are reversed in the sub-scanning direction, as shown by dotted lines.

To correct this, the recording paper must be rotated 180 degrees in the sub-scanning direction, which complicates the mechanical configuration. Therefore, in this embodiment, various comment information is stored in the ROM in advance and the successive addresses are changed. , the comment information is synthesized and output at a desired position on the back side of the recording paper, thereby simplifying the machine configuration. Details will be described later.

FIG. 3 is a block diagram showing the general configuration of the reading device 100 and the copying device 200.

In the reading device 100, the original image formed on the CCD IOS is outputted as an analog signal in synchronization with the clock generated from the synchronization control circuit 111 and sent to the image amplification circuit 1.
07 is amplified. The A/D conversion circuit 108 converts the analog image signal amplified by the image amplification circuit 107 into multivalued digital image information representing each pixel. A shading correction circuit 109 corrects distortions in the digital image information due to noise in the original image, uneven light intensity, dirt on the contact glass 102, uneven sensitivity of the CCD 106, and the like. Thereafter, the image processing circuit 110 converts it into digitally recorded image information. Further, control of each of the above sections is executed by a reading control circuit 112.

Next, the copying apparatus 200 includes an image memory section 30'1 (frame memory) that stores input digital recorded image information, and a system control device 30 that controls the entire system.
2, a copying circuit 500 consisting of a write drive control circuit 504 that controls the drive of a write device and a drive device 505, and an operation panel 402 and an operation control circuit 401. Device 400 configured
It consists of

Further, the writing device is composed of a line driver circuit 501, a laser driver circuit 502, and a laser diode 503.

In the copying apparatus 200, the digitally recorded image information converted by the image processing circuit 110 is output to the image information storage device 300 and written into one page memory of the image memory section 301. The digital storage image information stored in the page memory is received by a line driver circuit 501 constituting a writing device in the next copying circuit 500,
It is amplified by a laser driver circuit 502. The digitally recorded image information is a binary signal with one bit per pixel (recording/non-recording), and the laser driver circuit 502 activates the laser diode 503 to emit light in response to the binary signal.

Here, as shown in FIG. 4, the operation panel 402 is
It is composed of a CD panel display input section 403, a numeric keypad 404, various keys, and a display section, and allows input of various copying operations to the apparatus, input information, and confirmation of the status of the apparatus.

In the above configuration, the general operation of the copying process performed by this apparatus will be described below.

The copying operation command inputted from the operating device 400 is outputted to the system control device 302 to output various commands to other units to operate at predetermined timings so that the copying process according to the command is executed.

The system control device 302 instructs the reading control circuit 112 to start a document reading operation, and when the document is inserted into the reading device 100, the reading operation is performed at a predetermined timing. Here, the contents of the original are read by the CCD 106 and converted into analog signals.

Since the analog signal output from the CCD 106 is weak, it is amplified by the image amplification circuit 107 and then sent to the A/
The D conversion circuit 108 converts the signal into a digital signal, performs shading correction processing and image processing (for example, binarization processing, etc.), and outputs the signal to the image memory section 301 of the copying apparatus 200. Here, the synchronous control circuit 111 has CCD 1 0
6 and other circuits supply reference clocks, control signals, etc. for predetermined operations.

The image information temporarily stored in the image memory unit 301 can be used for various image editing processes (for example, by changing the reading method).
mirror inversion, etc.) are performed as necessary.

Next, the image information read out from the image memory section 301 is transferred to a laser diode 503 driven by a line driver circuit 501 and a laser driver circuit 502 of a copying circuit 500, and is transferred onto a photoreceptor drum 217 corresponding to the image information of the original. Forms an electrostatic latent image.

FIG. 5 is a block diagram showing details of the write drive control circuit 504 in the copying circuit 501 of FIG.

The write drive control circuit 504 includes a CPU 600 and a ROM.
601, 603, RAM602, timer 604,
It is composed of an address counter 605, a NOR element 606, and a selector 607.

Moreover, FIG. 6(a), FIG. 6(b), and FIG. 6(C) are flowcharts showing copy processing operations executed by this apparatus.

Below, Fig. 5, Fig. 6 (a), Fig. 6, etc.) and Fig. 6 (
The operation will be explained with reference to C).

CF)U600 in FIG. 5 is connected to the system control device 302, and is configured to mutually send and receive information necessary for the copying circuit 500 to perform a copying operation.

Key information input from the operation panel 402 is also input to the CPU 600 via the system control device 302. Further, a program for the CPU 600 to perform a series of copying operations is written in the ROM 601. One RO
M603 contains font information such as symbols and characters necessary when printing comment information, such as numbers, letters, ruled lines, etc.
Data such as shading, broken lines, and title boxes are written. Further, a timer 604 keeps track of the current time and date.

In the flowchart shown in FIG. 6(a), the system control device 302 initializes the copying apparatus 200 and makes preparations necessary for the copying operation (step 5701), and when the process is completed, a message "Ready to copy" is displayed. Operation panel 4
02, and as a result, key manual input can be accepted, and settings such as comment composite output, scaling, reverse copy, stop, paper size, density, etc. can be made. If key power is available (step 5702), key code conversion is performed (
Step S703), when there is input of comment synthesis output (step S714), each flag (FG) is set to 1 (step 5704). Thereafter, each subroutine is executed according to those flags.

In step 5704, when the comment FC becomes 1, the process shifts to the operation shown in the flowchart of FIG. 6(b), and waits for selection and input of comment information.

Here, paper folding position designation symbols, shading, title boxes, and other characters, numbers, and symbols can be entered as desired. For convenience of drawing, only the paper fold position indicator, shading, and title block composite output subroutine will be explained.
Other comment information is omitted because the basic operation is the same.

■Paper folding position indication symbol Since the paper folding position indication symbol (step 3801) has a composite output position that differs depending on the recording paper size, vertical and horizontal feeding directions, the CPU 600 uses the system control device 3 shown in FIG.
02, input related copy information (step 3802
). Once the size and feed direction of the recording paper are determined, the output position is also determined.

Furthermore, unless the inward fold symbol is printed on the front side and the outward fold symbol is printed on the back side, the outward fold symbol will be hidden when the recording paper is folded. Therefore,
It is determined which address data in the ROM 603 is to be output at which timing (Step 5803), and these address data are stored in the ROM 602 (Step 5804). Here, a space for front surface output and a space for rear surface output are predetermined in the RAM 602, and the address data is stored in each of them.

As mentioned above, since the paper folding symbol needs to be output in combination on the front and back sides of the recording paper, the back side output FC is set to 1 (step 5805) and the paper folding subroutine is exited.

Here, the paper folding position indication symbol is only output as a composite output for the front and back sides, but it is also possible to select the front or back side and output the composite output only for either one by inserting a conditional branch in the above paper folding subroutine. It is possible to achieve this.

■Shading Next, the shading synthesis output subroutine will be explained.

Shading is the process of combining and outputting halftone dots of a certain density on part or all of the scanned original image information on the front or back side, so that the shaded area is compared to other areas that are not shaded. It looks different compared to . for example,
If you shade a part of the document image information, combine it and output it on the back side of the recording paper, and copy the document image information to the front side, the shaded area will be transparent when the recording paper is viewed from the front side. and it looks emphasized.

Also, if you use the transfer paper as a document and then perform copying with a different density, it is possible to obtain a shaded image or an unshaded image, depending on the thickness of the transfer paper used as the document. It is. Here, if the shading is combined and output with the original image information on the surface, the resolution of the original artist information will decrease and the image will become very difficult to see.Furthermore, as the original is used as the original and the generations are set to the second and third generations, the image quality will deteriorate. Since the deterioration is noticeable, it is better to output the composite output on the back side for the shading.

In addition to shading using halftone dots, various other methods can be considered to satisfy the same function, such as diagonal lines, thin lines, etc., and these can also be easily incorporated into this device. .

In the shading subroutine (step S901), the output position is first input (step 5902), and for example, the area can be specified by specifying X and Y coordinates (mm), or by using a marker pen, which is commonly used today. input. Since both techniques are well known, their explanation will be omitted here.

Next, when the area to be shaded is set using the method described above, at what timing is the original image information stored in the screen memory unit 301 read out?
The CPU 6 sends address data indicating whether to output halftone dot 03.
00 is obtained by a predetermined calculation (step S903),
It is temporarily stored in the ROM 602.

Next, select whether to output the shading on the back side (step
Step 5904), if YES, the CPU 600 converts it for back side output based on the address data temporarily stored in the RAM 602 and stores it in the RAM 602. ), exit the shaded subroutine. On the contrary, N
If it is O, since the shading is a surface output, S is similarly converted into address data for surface output and stored in the RAM 602 (step 5907), and the shading subroutine is exited.

■Title block Next, the combined output of the title block will be explained.

Title blocks are often printed on drawings, etc. In addition to information about the drawing, it is a table that specifies the drawing's control number, date of creation, revisions, name of the creator, etc., and is generally always attached to drawing paper.

As an example of composite output of a title block, when there are two different drawings, each is read by this device, edited in the screen memory unit 301, and the edited image information is copied as a new drawing, For example, a title block may be combined and output at a position desired by the user, and this greatly improves the efficiency of drawing creation work.

Furthermore, in addition to the title block, tables, symbols, and characters in a prescribed form on drawings, such as outer borders and company names, can be easily synthesized and output using this apparatus.

Furthermore, once the size and feeding direction of the recording paper are determined, the positions at which they are output are also determined according to the standard, so it is possible to omit inputting the composite output position.

In the table BYM subroutine (step 5100I), the output position is first input (step 51002).
, Next, when the position at which table B111 is to be output is input, the address indicating at what timing the title column of the ROM 603 is to be output when the original image information stored in the screen memory unit 301 is read out is input. Data to CPU600
is obtained by a predetermined calculation (step 51003), and is temporarily stored in the ROM 602.

Next, it waits for the input of back side output (step 51004) or mirror image output (step 51005.1008).
The routine branches to different types of routines, and each address data is determined.

Here, as shown in FIG. 7(a), in the surface copying process,
Once the image information has been copied, the next time the apparatus performs the copying process on the back side, the result will be as shown in FIG. 7(b), as described above. In FIG. 7(b), the numbers drawn with dotted lines indicate whether the numbers copied in the previous stage are arranged as shown on the back side S. From this figure, it can be seen that the main scanning direction is in the normal state, but the sub-scanning direction is reversed. When combining and outputting comment information on the back side, it is necessary to reverse the address of the normal image only in the sub-scanning direction and read it from the ROM 603. Further, when outputting a mirror image, it is necessary to read the data in the ROM 603 by reversing both the main scanning and sub-scanning directions.

Therefore, in the present invention, the CPU 600 branches to four types of routines and further corrects the address data stored in the RAM 603 as described above.

After executing the address correction, the CPU 600 executes the R
Step 510: Store address data in AM602
06.51007.51009.51011), set FC to 1 only for back side output Steps 5IOIO, 5IO12
), exit the title block routine.

This device also has ruled lines, input of arbitrary characters, numbers, subroutines, etc., but since the operations are almost the same as the above subroutines, their explanation will be omitted.

With this, the comment information selection input routine is completed, and after confirmation (step 5 LIOI), the process proceeds to the next stage. Here, if NO is input when confirming, the process returns to the start of the selection input, so it is possible to select a plurality of pieces of comment information again and output the composite.

Returning to the flowchart of FIG. 6(a), the original is inserted (step 5705), image reading operation is started (step S706), and the read image information is temporarily stored in the image memory unit 301 (step 5707). . Next, it is determined whether the comment FG is 1 or not (Step 5708)
, 0, paper feeding starts at a predetermined timing (Step 5709), document image information is read from the image memory unit 301 (Step S710), copying operation begins (Step 3711), and then back side output is performed. FC=1
If it is determined to be O (step 5712), the recording paper is ejected (step 5713).
, the copying operation is completed and the machine returns to its initial state.

In step 3708 above, on the contrary, comment FG
If it is determined that =1, the flowchart shown in FIG. From among the comment information written in the ROM 603 to be synthesized and output, the desired comment information is read out from the ROM 603 by matching the successive timing with the read image information using the address data stored in the RAM 602 (step 51
202), and composite image information is output by the selector 607 shown in FIG. 5 (step 51203).

Next, returning to FIG. 6(a), a copying operation is performed (step 5711), and then, in step 5712, when it is determined that the back side output FC=1, as shown in FIG.
), and the recording paper on which the surface copying process has been performed is guided to the reversing unit (step 313).
01) and stacked in the reversing unit (step 51).
302), the stacked recording paper starts feeding from the reversing unit at a predetermined timing (step 5).
1303). Thereafter, as described above (the composite output is performed, but the read image information is not output from the image memory unit 301,
Only data from ROM 603 is output. This is because the image memory unit 301 stores read image information copied on the front surface.

Further, the address of the comment information to be synthesized and output and the address indicating the output timing are input to the RAM 602, and the comment information is output from the ROM 603 in accordance with them (step 31304). After that, the image information and comment information are combined (step 51305).
), back side output FC=O (step 51306),
- End the series of operations.

Here, as mentioned above, the way to read the comment information from the ROM 603 is different between the back side/normal image output and the back side/mirror image output, but since each is stored in the RAM 602 in a corrected state, the comment information is stored in the RAM 602. This is possible by reading out the addresses sequentially.

FIG. 8 shows an example in which paper folding position symbols are synthesized and output on A3 size recording paper according to this embodiment, where the solid line indicates the synthesized output on the front side, and the dotted line indicates the synthesized output on the back side.

As described above, the added value of copying processing is further expanded by making it possible to output composite comment information regardless of whether it is on the front or back side.

In addition, in this embodiment, the front side of the recording paper is used for copying the original image information and the combined output of comment information, and the back side is used for only the combined output of comment information. However, if there is image information on the back side of the original. However, by adding reading of the back side and writing to the image memory unit, it is possible to perform copy processing of image information and composite output of comment information even on the back side.

Further, the present invention can achieve even more remarkable effects by using it in an industrial wide-width copying machine (a copying machine capable of copying AO, Al, A2, etc.). The main purpose of this type of copying machine is to copy design drawings, and by outputting a composite of the comment information explained above, it is possible to more efficiently store, modify, manage, and search the copied recording paper. It can be carried out. Further, in this type of copying machine, these operations are particularly important compared to a normal copying machine.

Furthermore, when copying a second original drawing paper such as tracing paper, for example, the comment information on the back side is added to the image information on the front side by combining and outputting the comment information as a mirror image on the back side. This makes it easy to modify the copied image information, and by making the comment information on the back side different, it is possible to easily create different drawings using the image information on the front side.

As described above, in the image forming apparatus according to the present invention, the comment information is output in a composite manner on both the front and back sides of the recording paper. Instead of having to perform the compositing operation twice, comment information can be composited and output on both the front and back sides of the recording paper in a single document reading process.

In addition, it is also possible to respond to comment information that is useless unless it is output on the front and back sides of the recording paper (for example, paper folding position indication symbols, etc.) as described in the conventional technology. becomes.

Furthermore, by making the comment information output as a normal image or a mirror image, for example, by copying the original image information on the front side and outputting the comment information as a mirror image on the back side, and by making the recording paper transparent, A copy image can be created with comment information added to the image information, and operations such as making the area look different from other areas using shading etc. can be easily realized. Furthermore, by using this document as a document and executing a copying process by varying the copy density in a copying device, it is possible to copy only document image information and document image information with comment information added.

In addition, for example, when copying a drawing into a second original drawing, etc., output the ruled lines, title block, outer frame, etc. as a mirror image on the back side, and copy only the drawing on the front side, then the drawing can be corrected. It is very convenient when

Furthermore, depending on the comment information, it may be desirable to output the content on the back side rather than the front side. In this way, by utilizing the back side, where copying processing is relatively rare, and outputting comment information in a composite manner, the added value of copying processing can be further expanded.

〔Effect of the invention〕

As described above, according to the image forming apparatus according to the present invention, there is provided a reading means for reading document image information, a first storage means for storing the document image information read by the reading means, and a first storage means for storing the document image information read by the reading means. a first control means for controlling writing/reading of the second storage means, a second storage means for storing additional image information, a second control means for controlling writing/reading of the second storage means, and the reading means. In an image forming apparatus, the image forming apparatus includes a copying means for copying original image information read by a printer onto one or both sides of a recording paper, and a composition output means for combining and outputting the additional image information with the original image information, the composition output means has a first selection means for selectively and compositely outputting the additional image information on one side or both sides of the recording paper, and a second selection means for selectively and compositely outputting the additional screen information as a normal image or a mirror image. By selectively controlling the composite output to the front or back side of the recording paper, and further selectively controlling the composite output of the comment information to a normal image or a mirror image, it is possible to expand the range of application of image formation and improve the efficiency of office processing. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the mechanical structure of a reading device in an image forming apparatus according to the present invention, FIG. 2 is an explanatory diagram showing the structure of a copying apparatus to which the image forming apparatus according to the present invention is applied, and FIG. 3 is an explanatory diagram showing the structure of a copying apparatus to which the image forming apparatus according to the present invention is applied. FIG. 4 is an explanatory diagram showing the structure of the operation panel shown in FIG. 3, and FIG. 5 shows the structure of the write drive control circuit shown in FIG. 3. Block diagram, Figure 6 (a), (b), (C), (
d) is a flowchart showing the operation of the image forming apparatus according to the present invention, and FIGS. 7(a), 7(b), and 8 are explanatory diagrams showing examples of outputting original image information onto recording paper according to the present invention. Explanation of symbols 100-Reading device 106-CCD llo-Image processing circuit 111-Synchronization control circuit 11
2-Reading control circuit 20C1-Copying device 217---
- Photosensitive drum 221 - Recording paper 300 - - Image information storage device 301 - Image memory unit 302 - - System control device 400 - Operating device 401 - - Operation control circuit 402 - Operation panel 50 (L-m =Copying circuit 501--Line driver circuit 502--Laser driver circuit 503--Laser diode 504--Writing drive control circuit 600--CPU 60
1.603-・-ROM 602-RAM605-
Address counter 606-N OR element 607-・-
selector

Claims (3)

[Claims] (1) A reading means for reading original image information, a first storage means for storing the original image information read by the reading means, and a first control means for controlling writing/reading of the first storage means. a second storage means for storing additional image information; a second control means for controlling writing/reading of the second storage means; and a second control means for controlling writing/reading of the second storage means; Alternatively, in an image forming apparatus comprising a copying means for copying on both sides, and a composition output means for combining and outputting the additional image information with the original image information, the composition output means copies the additional image information on one side of recording paper or An image forming apparatus comprising a selection means for selectively combining and outputting images on both sides. (2) a reading means for reading original image information; a first storage means for storing the original image information read by the reading means; and a first control means for controlling writing/reading of the first storage means. a second storage means for storing additional image information; a second control means for controlling writing/reading of the second storage means; and a second control means for controlling writing/reading of the second storage means; Alternatively, in an image forming apparatus comprising a copying means for copying on both sides, and a composition output means for combining and outputting the additional image information with the original image information, the composition output means outputs the additional screen information as a normal image or a mirror image. An image forming apparatus comprising a selection means for selectively combining and outputting. (3) a reading means for reading original image information; a first storage means for storing the original image information read by the reading means; and a first control means for controlling writing/reading of the first storage means. a second storage means for storing additional image information; a second control means for controlling writing/reading of the second storage means; and a second control means for controlling writing/reading of the second storage means; Alternatively, in an image forming apparatus comprising a copying means for copying on both sides, and a composition output means for combining and outputting the additional image information with the original image information, the composition output means copies the additional image information on one side of recording paper or An image forming apparatus comprising: a first selection means for selectively and compositely outputting the additional screen information on both sides; and a second selection means for selectively and compositely outputting the additional screen information as a normal image or a mirror image.