JPH09130582A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a difference of longitudinal/lateral magnification from being caused in an output image even when an image of an original is rotated by 90/270 degrees in the case of fine-adjusting a scanning speed of the original. SOLUTION: When an image of an original is rotated by 90/270 degrees in the case of fine-adjusting an output magnification through the change in a scanning speed of the original, setting data denoting magnification fine- adjustment are called from a memory (S201, S220), the magnification in the main direction and the sub direction is set depending on the setting data (S230, S240). For example, when the setting data is less than 10% (when scanning speed slows down), the electric magnification is set so as to reduce the image in the main direction and to extend the image in the sub direction depending on the setting data.

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 facsimile, and a composite machine thereof.

[0002]

2. Description of the Related Art In a conventional digital copying machine having a memory function, a rotation processing function of outputting an image of a document by rotating it by 90 degrees in order to perform an electronic sort or to reduce a margin of a recording sheet as much as possible is provided. Some have. Such a rotation processing function is disclosed in, for example, Japanese Patent Laid-Open Nos. 3-79541 and 3-117973.

[0003]

Generally, in a copying machine, the magnification of the output magnification in the sub-scanning direction is determined by the scanning speed of the original document and the system speed of the image forming system, and there is a variation factor compared to the main scanning direction. Many. For this reason, for users who have severe demands on the magnification, the output magnification in the sub-scanning direction is adjusted in the market in order to match the output magnifications in both directions. For this adjustment, usually
A method of fine-adjusting the scanning speed of the document by the scanner while watching the output image is taken (another method is to adjust the output magnification in the sub-scanning direction by adjusting the system speed of the image forming system. is there).

However, the fine adjustment of the scanning speed of the scanner is performed on the assumption that the document direction and the paper direction have a fixed relationship (the two directions are not always the same). Therefore, in the above-described conventional digital copying machine, for example, when the speed of the image forming system (system speed) deviates from the target value and the scanning speed of the original is finely adjusted to compensate for this, the original is scanned. When the image obtained by reading is rotated 90 degrees or 270 degrees, the output image has a difference in magnification between the vertical direction and the horizontal direction. The above publication makes no mention of this point, and only describes the function of 90 ° image rotation.

Therefore, according to the present invention, in the state where the scanning speed of the document is finely adjusted, even if the image of the document is rotated by 90 degrees or 270 degrees and output by utilizing the memory function, the output image has a vertical direction. It is an object of the present invention to provide an image forming apparatus such as a copying machine in which there is no difference in magnification between the horizontal direction and the horizontal direction.

[0006]

In order to solve the above problems, according to the present invention, a reading means for reading a document in a scanning line sequential manner and outputting image data, and a scanning speed of the document by the reading means or an image forming system. By changing the speed, adjusting means for adjusting the output magnification in the sub-scanning direction of the image of the original read by the reading means, storage means for accumulating image data output from the reading means, and processing for the image data are performed. In an image forming apparatus having a rotating means for rotating the image representing the original, and an output means for outputting the image rotated by the rotating means at a predetermined magnification, a detecting means for detecting an adjustment amount by the adjusting means, and a rotating means. When the image is rotated by 90 degrees or 270 degrees, the main direction in the image output by the output means based on the adjustment amount. And it has a ratio control means for adjusting the sub-direction magnification, and configurations with.

The main direction and the sub direction in the output image are determined based on the direction in which the paper on which the output image is transferred is discharged, and the sub direction and the sub scanning direction are usually the same direction. Therefore, the output magnification in the sub-direction is adjusted by changing the scanning speed of the document or the system speed of the image forming system by the adjusting means. Now, assuming that the system speed of the image forming system deviates from the target value and the scanning speed of the document is finely adjusted to compensate for this, the image obtained by the reading means reading the document is equal to the adjustment amount. The magnification changes in the sub-scanning direction, that is, the sub-direction, and data representing such an image is stored in the storage means. Here, when the rotating means rotates the image by 90 degrees or 270 degrees, the direction of the magnification changed by the adjusting means changes from the sub direction to the main direction. Therefore, if the image is output as it is, a difference occurs in the magnification in the main direction and the sub-direction in the output image, and this difference is promoted by the deviation of the system speed of the image forming system. Therefore, in the image forming apparatus having the above configuration, the detection unit detects the adjustment amount of the adjustment unit, and the magnification control unit adjusts the magnification in the main direction and the sub direction in the output image based on the adjustment amount. This makes it possible to match the magnifications in both directions in the output image. Although the system speed of the image forming system deviates from the target value in the above, the scanning speed of the document deviates from the target value, and the system speed of the image forming system is finely adjusted to compensate for this. Also in this case, the magnifications in both directions in the output image can be matched in the same manner as described above.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

<Overall Configuration of Embodiment> FIG. 1 is a longitudinal sectional view showing the overall configuration of a digital copying machine according to an embodiment of the present invention.
This digital copying machine is composed of a reading device and a printer device, the reading device is composed of a scanning system, an image signal processing section 20, a memory unit section 30, etc., and the printer apparatus is a printing processing section 40, a printing optical system, and a production unit. It is composed of an image system and the like. In addition, the upper surface of this digital copying machine is L
An operation panel (not shown) composed of a CD (liquid crystal display) is provided, and various key operations can be performed from the operation panel.

The scanning system in the reading device is a scanner 19
And the exposure lamp 11 assembled to the scanner 19,
The first mirror 12 and the second and third mirrors 13a, 13
b, the condenser lens 14, and CC as a photoelectric conversion element
A D (charge coupled device) 16 and a scanner motor M2 that horizontally moves the scanner 19 below the original glass 18 (the moving direction of the scanner 19 is the "sub-scanning direction") and the like. With such a configuration, the document placed on the document glass 18 is exposed and scanned, and the document information obtained by the scanning is sent to the image signal processing unit 20.

The image signal processing section 20 processes the document information, that is, the image signal output from the CCD 16, detects the document size, and outputs image data to the memory unit section 30. Memory unit 30
Stores image data and performs image rotation processing and the like. Then, the image data is sent to the print processing unit 40 of the printer device. The details of the image signal processing unit 20 and the memory unit unit 30 will be described later.

The print processing section 40 generates a drive signal for driving the semiconductor laser based on the image data sent thereto, and supplies this to the print optical system. The print optical system is driven by its drive signal to emit a laser beam, a semiconductor laser 62, a polygon mirror 65 that polarizes the laser beam, a driving unit 64 of the polygon mirror 65, a main lens 69, and reflection mirrors 67a and 67.
b. A laser beam representing the image of the original is generated by this printing optical system and sent to the image forming system.

The image forming system includes a developing transfer system 70A and a conveying system 70.
B, a fixing system 70C, etc., and a main motor M1 is provided as a drive source for each of these drive parts. Of these, the development transfer system 70A includes a photosensitive drum 71 that is rotationally driven in the counterclockwise direction in FIG. 1, and a charging charger 72 that is arranged around the photosensitive drum 71 in order from the upstream side in the rotational direction.
b, a developing device 73b, a transfer charger 74, a separation charger 75, a cleaning unit 76 and the like. In the developing and transferring system 70A, an electrostatic latent image corresponding to the image of the original is formed on the photosensitive drum 71 by the laser beam from the printing optical system, and a two-component developing solution composed of toner and carrier is developed on the developing device 73b. Supplied by. As a result, toner adheres to the photoconductor drum 71 in accordance with the electrostatic latent image, and after this toner is transferred to the paper supplied from the transport system 70B, the transferred paper is separated from the photoconductor drum 71. . The toner remaining on the photoconductor drum 71 is removed by the cleaning unit 76 in preparation for the next image forming operation.

The transport system 70B includes cassettes 80a and 80b for storing sheets and a sensor S for detecting the sheet size.
E11 and SE12, a timing roller 82, a conveyor belt 83, etc.
Supply paper to A.

The fixing system 70C includes a fixing roller 84 that conveys the above-mentioned transferred paper while thermally fixing it, and a discharge roller 8.
5 and a discharge sensor SE6 that detects discharge of the transferred paper
It is composed of 2 etc.

<Structure of Control Unit> FIG. 2 is a block diagram showing a structure of a portion (hereinafter, referred to as “control unit”) for controlling the operation of the digital copying machine having the above-mentioned structure, and the constituent elements already mentioned above. Are denoted by the same reference numerals.

The control unit is mainly composed of five CPUs (central processing units) 1 to 5, and each of these CPUs 1 to 5
RO that stores each program corresponding to 5
Ms (read only memories) 111 to 115 and RAMs (random access memories) 121 to 125 which are working areas during program execution are provided. The CPU 3 is provided in the memory unit section 30.

The roles of the CPUs 1 to 5 are as follows. That is, the CPU 1 controls the input and display of signals based on various key operations on the operation panel (not shown). The CPU 2 controls each unit of the image signal processing unit 20, controls the drive of the scanning system, and controls the main motor M1 which is the drive source of the image forming system. The CPU 3 controls the memory unit section 30 to temporarily store the read image data in the memory, then read it and output it to the print processing section 40. The CPU 4 controls the print processing unit 40, the print optical system, and the image forming system.
The signals from the paper size detection sensors SE11 and SE12 are input to the I / O managed by the CPU 4, and the size of the copy paper is also managed by the CPU 4. CPU5
Performs processing for adjusting the overall timing of the control unit and setting operation modes.

<Control and Operation of Scanning System and Image Signal Processing Unit> FIG. 3 is a block diagram showing the configuration of the scanning system and image signal processing unit 20. Hereinafter, the control and operation of the scanning system and the image signal processing unit 20 will be described with reference to this figure. The image signal processing unit 20 includes a timing control unit 21.
Is provided, and the timing control unit 21 supplies an image reading synchronization signal to each block. The CCD 16 in the scanning system operates based on this synchronizing signal, and photoelectrically converts the image of the document to generate an electric signal. This electric signal, that is, the image signal of the document is sequentially processed by the respective units provided in the image signal processing unit 20 as follows. C
The image signal generated by the CD 16 is first amplified by the amplifier 23 and converted into an 8-bit digital signal by the AD converter 25. The shading correction unit 26 corrects the digital signal by removing distortion caused by the optical system and the CCD 16. Next, the density converter 2
At 7, processing for conversion of reflection data into density data and gamma correction is performed. The image signal after this processing is input to the electrical scaling section 28, and electrical scaling processing is performed based on predetermined magnification data. After that, the image processing unit 29 performs image editing processing on the image data represented by the image signal, and the edited image data is supplied to the memory unit unit 30.

When the image signal processing unit 20 operates, the CPU 2 sets parameters in the units 26 to 29. Also, the image data for one line is stored in the image monitor memory 24 provided in the image signal processing unit 20. Further, the CPU 2 controls the scanner motor M2 and the CPU 5
Also communicates with.

In this digital copying machine, the scanning system detects the original size and whether the original is placed vertically or horizontally. At this time, the CPU 2 operates as follows.
The instruction of the document size detection operation is issued from the CPU 5, and C
Upon receiving this instruction, PU2 performs a preliminary scan. That is, the CPU 2 controls the scanner motor M2 based on the scanner position information from the scanner position sensor SE-IR provided in the scanning system, and causes the scanner 19 to scan in the sub scanning direction. Then, at the timing corresponding to the sub-scanning position, the document size and whether the document is placed vertically or horizontally are detected from the contents of the image data and the scanner position information, and the detection result is detected as CP.
Send to U5.

When reading a document, the CPU 2
Receives the magnification information from the CPU 5 and controls the speed of the scanner motor M2 so that the scanning speed becomes the scanning speed according to the magnification information.

<Control and Operation of Memory Unit Section> FIG. 4
FIG. 3 is a block diagram showing an internal configuration of the memory unit section 30. The memory unit unit 30 controls the CPU 3 as a whole, a switching unit 301, a binarization processing unit 302 that binarizes an image signal from the image signal processing unit 20 based on parameter setting from the CPU 3, and a predetermined unit. Capacity (eg
A multi-port image memory 304 having a capacity of two A4 size originals at 400 dpi, a code processing unit 305 including a compressor 311 and an expander 312 that can operate independently of each other, and a multi-port code memory 306. A rotation processing unit 307, a multivalued processing unit 308 that creates multivalued data based on parameter settings from the CPU 3, a scaling processing unit 309, and the like.

In the above configuration, the code processing unit 305 has two
When the image data binarized by the binarization processing unit 302 is written in the image memory 304, the binary image data is read and compressed, and the code data obtained by the compression is written in the code memory 306. Further, in accordance with a command from the CPU 3, the code data written in the code memory 306 is read and expanded, and the binary image data obtained by the expansion is written in the image memory 304.

When one page of binary image data is stored in the image memory 304 by decompression, the CPU 3 reads the binary image data from the image memory 304 and supplies it to the rotation processing unit 307. The binary image data supplied to the rotation processing unit 307 is subjected to processing for rotating the image represented by the binary image data, if necessary, and then the multi-value conversion processing unit 308 multi-values it. Be converted. The multivalued image data thus obtained is supplied to the scaling processing unit 309. The scaling processing unit 309 is capable of scaling in both the main direction and the sub-direction.
The scaling process is performed based on the scaling factor set by U3. Here, the main direction means a direction perpendicular to the discharging direction of the sheet on which the output image is transferred, and the sub direction means the discharging direction.
Usually, the main direction coincides with the main scanning direction, and the sub direction coincides with the sub scanning direction. The image signal output from the scaling processing unit 309 is sent to the print processing unit 40 in the printer device via the switching unit 301.

<Fine Adjustment of Output Magnification> The scanning speed of the scanner 19 of the reading device, the scanning speed of the printing optical system, the driving speed of the main motor M1 of the image forming system, the speed of the timing roller 82, etc. are the same as those in the digital copying machine. Affects the output magnification in the sub-scanning direction. Among these, the error is likely to occur in the paper feed speed and the rotational drive speed (for the photosensitive drum 71 etc.), but these are managed and assembled so as to have a predetermined speed and accuracy. Therefore, usually, a big problem does not occur. However, since these have variations, it is necessary to adjust the output magnification in the sub-scanning direction in the market for a user who has a severe demand for magnification. In this case, since it is difficult to adjust each speed to the target speed, the scanning speed of the scanner 19 is finely adjusted so that the magnification in the sub-scanning direction matches the magnification in the main scanning direction while observing the output image. The method of doing is taken. This makes it possible to adjust the output magnification in the vertical / horizontal direction when the original is output in the direction in which it is placed on the original glass 18.

FIG. 5 shows a display screen on the operation panel at the time of the fine adjustment of the scanner 19 (this operation panel is composed of an LCD as described above). An area PA101 in FIG. 5 is a portion for displaying the scanning speed as a percentage, areas PA105 and PA106 are operation button portions for setting an increase / decrease in speed, and an area PA110 is a setting button portion for operating when changing the speed set value. The area PA112 is a registration button portion for registering the set contents, and the area PA114 is a cancel button portion for canceling the changed value.

The above-mentioned screen is not displayed in the normal use state, but is displayed only when the operation is shifted to the magnification fine adjustment mode for adjusting the output magnification, and the magnification fine adjustment mode is entered. Can be moved only when a mode for maintenance etc. called a serviceman mode is entered.

<Operation in Magnification Fine Adjustment Mode>
The operation in the magnification fine adjustment mode of the digital copying machine of this embodiment will be described. First, a process for a key operation from the operation panel in the magnification fine adjustment mode will be described. The processing for this key operation is performed by the CPU 1, and the CPU 1 operates as shown in the flowchart of FIG.

That is, when the magnification fine adjustment mode is entered, the state of the operation panel is first detected in step S101. If it is determined in step S101 that the operation panel is not operated, the process of this flowchart is ended.

If it is determined in step S101 that the setting button area PA110 (see FIG. 5) has been pressed, the process proceeds to step S110. In step S110, data representing the current setting value of the output magnification (hereinafter referred to as “setting value data”) is called from the memory, and in the next step S112, the area PA106 (see FIG. 5) of the button for decreasing the setting value is set. It is determined whether or not it has been pressed. As a result, if the area PA106 is not pressed, the process directly proceeds to step S115, and the area PA106 is pressed.
If is pressed, the set value data is changed to decrease the set value in step S112, and then the process proceeds to step S115. In step S115, it is determined whether or not the area PA105 (see FIG. 5) of the button for increasing the set value has been pressed. If not pressed, the process proceeds directly to step S120, and if pressed, After changing the set value data to increase the set value in step S116, the process proceeds to step S120. Step S12
At 0, the set value represented by the set value data is displayed in the area PA101 (see FIG. 5). After that, the set value data is stored in the memory, and the processing of this flowchart ends.

If it is determined in step S101 that the registration button area PA112 (see FIG. 5) has been pressed, the process proceeds to step S130. In step S130, the setting value data stored in the memory is registered, and then in the next step S131, the setting value data is transmitted to another CPU. Then, in step S132, the display screen of the operation panel is returned from the screen in the fine magnification adjustment mode (see FIG. 5) to the standard screen, and the process of this flowchart ends. When the setting value data is registered in this manner, the CPU 2 controls the speed of the scanner motor M2 so that the scanning speed becomes the scanning speed corresponding to the setting data when the document is subsequently read.

If it is determined in step S101 that the cancel button area PA114 (see FIG. 5) has been pressed, the process proceeds to step S140. Step S14
At 0, after changing the set value data stored in the memory to return the set value to "100%", that is, the standard value, at the next step S141, the value of the set value data, that is, "100%" is changed to the operation panel. Displayed on the screen. After that, in step S142, the display screen of the operation panel is returned from the screen in the fine magnification adjustment mode (see FIG. 5) to the standard screen, and the process of this flowchart ends.

Next, the processing for controlling the output magnification in the magnification fine adjustment mode will be described. This processing is performed by the CPU 3 which controls the memory unit section 30,
At this time, the CPU 3 operates as shown in the flowchart of FIG.

That is, when the magnification fine adjustment mode is entered, first, in step S201, the image is adjusted to 90 degrees or 2 degrees.
It is determined whether or not the mode is required to rotate 70 degrees. Here, the mode that requires 90 degrees or 270 degrees is, for example, when the copy sheets are alternately discharged by the electronic sort function, or when it is preferable to rotate and output the image to save the sheets. Etc. Further, it also includes the case where it is better to rotate by 90 degrees or 270 degrees from the result of the conventionally known character top-bottom recognition processing. In the mode where it is necessary to rotate the image 90 degrees or 270 degrees, the main direction coincides with the sub-scanning direction, which is different from the normal case.
The sub-direction matches the main scanning direction.

In step S201, 90 degrees or 2
If it is determined that the mode is not required to rotate by 70 degrees, the process proceeds to step S210, and the memory unit unit 30
The same magnification data is set as the main-direction and sub-direction scaling ratio setting values for the scaling processing unit 309 in the above. Then, the process of this flowchart is completed.

In step S201, 90 degrees or 2
When it is determined that the mode requires the rotation of 70 degrees, the process proceeds to step S220 and step S131 of FIG.
The setting value data, which has been finely adjusted in magnification, transmitted in step S6 is called from the memory. Next, in step S230, a subroutine for setting the magnification in the main direction is sequentially executed, and in step S240, a subroutine for setting the magnification in the sub-direction is sequentially executed.
Then, the process of this flowchart is completed. Details of the processing contents of steps S230 and S240 will be described below.

FIG. 8 is a flowchart showing an example of a subroutine for setting the magnification in the main direction, which is executed in step S230. In this example, when this subroutine is called, first, in step S231, it is determined whether or not the magnification set value represented by the set value data called from the memory is 100%.

In step S231, the magnification setting value is 1
If it is determined to be 00%, step S232.
Then, the process proceeds to step S4 and the main-direction scaling factor of the scaling unit 309 is set to the same size. Then, the process of this subroutine is completed.

In step S231, the magnification setting value is 1
If it is determined to be less than 00%, that is, if the scanning speed of the scanner 19 is adjusted to be slower than the standard value, the process proceeds to step S233, and the set value data (fine-adjusted (Data representing the magnification setting value of 1) is set as the main-direction scaling data of the scaling processing unit 309. Then, the process of this subroutine is completed. By such processing, during the subsequent copying operation,
The image of the document read by the scanner 19 is reduced in the main direction by the scaling processing unit 309.

In step S231, the magnification setting value is 1
If it is determined that the scanning speed of the scanner 19 is greater than 00%, that is, if the scanning speed of the scanner 19 is adjusted to be higher than the standard value, the process proceeds to step S234.
The scaling processing unit 30 sets the set value data called from the memory.
9 main-direction scaling factor data. Then, the process of this subroutine is completed. By such processing,
In the subsequent copying operation, the image of the original read by the scanner 19 is magnified in the main direction by the scaling unit 309.

FIG. 9 is a flow chart showing an example of a sub-direction magnification setting subroutine executed in step S240. In this example, when this subroutine is called, first, in step S241, it is determined whether or not the magnification setting value represented by the setting value data called from the memory is 100%.

In step S241, the magnification setting value is 1
If it is determined to be 00%, step S242.
Then, the process proceeds to step S4 and sets the sub-direction scaling ratio of the scaling processing unit 309 to the same size. Then, the process of this subroutine is completed.

In step S241, the magnification setting value is 1
If it is determined to be less than 00%, that is, if the scanning speed of the scanner 19 is adjusted to be slower than the standard value, the process proceeds to step S243, and "100" is set as the set value data retrieved from the memory. Value (fine-adjusted magnification setting value) divided by Rm, multiplied by “100”, that is, data representing a value of (100 / Rm) × 100 is changed in the sub-direction scaling ratio of the scaling processing unit 309. Set as data. Then, the process of this subroutine is completed.
By such processing, the image of the original read by the scanner 19 is magnified in the sub-direction by the scaling processing unit 309 in the subsequent copying operation.

In step S241, the magnification setting value is 1
If it is determined to be greater than 00%, that is, if the scanning speed of the scanner 19 is adjusted to be higher than the standard value, the process proceeds to step S244, and the same as above.
A value obtained by dividing “100” by the value Rm represented by the set value data retrieved from the memory and multiplied by “100”, that is, data representing a value of (100 / Rm) × 100, is added to the scaling unit 309. Set as direction scaling data. Then, the process of this subroutine is completed. By such processing, the image of the original read by the scanner 19 is reduced in the sub-direction by the scaling unit 309 in the subsequent copying operation.

FIG. 10 is a flowchart showing another example of the sub-direction magnification setting subroutine executed in step S240. In this example, instead of adjusting the output magnification in the sub-direction by the scaling processing unit 309, the main motor M1
The output magnification in the sub direction is adjusted by controlling the rotation speed of. Therefore, as shown in FIG.
In this example, the CPU 4 in charge of controlling the print optical system and the image forming system executes a subroutine for setting the magnification, unlike the example of the subroutine.

In this example, when this subroutine is called, it is first determined in step S251 whether or not the magnification set value represented by the set value data called from the memory is 100%, as in the example of FIG. .

In step S251, the magnification setting value is 1
If it is determined to be 00%, step S252.
Then, the speed of the main motor M1 is changed to the rotation processing unit 309.
(See FIG. 4) The speed is set to a predetermined value (hereinafter referred to as “normal value”) when neither 90 degree rotation processing nor 270 degree rotation processing is performed. Then, the process of this subroutine is completed.

In step S251, the magnification setting value is 1
If it is determined to be less than 00%, that is, if the scanning speed of the scanner 19 is adjusted to be slower than the standard value, the process proceeds to step S253, and the main motor M
The ratio of the speed of 1 to the normal value is a value obtained by dividing "100" by the value (the finely adjusted magnification setting value) Rm represented by the setting value data retrieved from the memory, that is, 100 / Rm.
The speed of the main motor M1 is set so as to be equal to this value. Then, the process of this subroutine is completed. By such processing, during the subsequent copying operation,
The speed of the main motor M1 which is the drive source of the image forming system increases based on the value 100 / Rm. As a result, the image of the original read by the scanner 19 is enlarged in the sub-direction and output.

In step S251, the magnification setting value is 1
If it is determined that the scanning speed of the scanner 19 is greater than 00%, that is, if the scanning speed of the scanner 19 is adjusted to be higher than the standard value, the process proceeds to step S254 and the same as above.
The main motor M1 is adjusted so that the ratio of the speed value of the main motor M1 to the normal value is equal to the value "100" divided by the value Rm represented by the set value data retrieved from the memory, that is, the value 100 / Rm. Set the speed of. Then, the process of this subroutine is completed. By such processing, the speed of the main motor M1 which is the drive source of the image forming system is 100 / R when the subsequent copying operation is performed.
Decreases based on m. As a result, the image of the document read by the scanner 19 is reduced in the sub-direction and output.

<Effect> FIGS. 11 (a) to 11 (e) show that the scanner 19 is operated by operating the keys on the operation panel shown in FIG.
FIG. 3 shows various cases of an original and an image on a copy sheet when finely adjusted so as to reduce the scanning speed of.

FIG. 11A shows a case where the original is output on the copy sheet in the same direction as the original is placed, that is, the image is output without performing the image rotation processing by the rotation processing unit 307 in the memory unit section 30. Indicates. In this case, the system speed of the image forming system (such as the drive speed of the main motor M1)
Since the scanning speed of the scanner 19 is finely adjusted in accordance with the above, there is no discomfort in the vertical and horizontal magnifications in the image (output image) of the copy paper.

11B and 11C show the case where the images read by the scanner and temporarily stored in the memory in the conventional digital copying machine are rotated by 90 degrees and 270 degrees, respectively, and output. As shown in these figures, when adjusting to slow down the scanning speed of the scanner,
When the image is output after being rotated by 90 degrees or 270 degrees, the image on the copy sheet is enlarged in the main direction and reduced in the sub direction with respect to the original image.

11 (d) and 11 (e), the images read by the scanner 19 and temporarily stored in the memory in the digital copying machine of this embodiment are rotated 90 degrees and 270 degrees by the rotation processing unit 307, respectively. The case where it is output is shown. In the present embodiment, in the state where the scanning speed of the scanner 19 is finely adjusted to be slow, the rotation processing unit 3
When the image is rotated by 90 degrees or 270 degrees according to 07 and outputted, the magnification control is performed by an amount corresponding to the adjustment amount by the operation panel shown in FIG. The image is reduced (see step S233 in FIG. 8), and the output image is enlarged in the sub-direction (step S243 in FIG. 9 and FIG. 10).
See step S253). As a result, FIG.
As shown in (d) and (e), an output image having no sense of discomfort in vertical and horizontal magnifications and sizes can be obtained on the copy paper.

On the other hand, in the conventional digital copying machine, when the image is rotated 90 degrees or 270 degrees and outputted in a state where the scanning speed of the scanner is adjusted to be high, the image on the copy paper is the original document. The image is reduced in the main direction and enlarged in the sub direction. According to the digital copying machine of the present embodiment, in this case, the control of the magnification is performed so that the output image is enlarged in the main direction by the amount corresponding to the adjustment amount by the operation panel (FIG. 8).
Step S234), the output image is reduced in the sub-direction (step S244 in FIG. 9,
(See step S254 in FIG. 10). Therefore, even when the scanning speed of the scanner 19 is adjusted to be high,
On the copy paper, an output image can be obtained without a sense of discomfort in the vertical and horizontal magnifications and sizes.

[0055]

According to the present invention, when the original image is rotated 90 degrees or 270 degrees and is output while the original scanning speed (or system speed of the image forming system) is adjusted, the adjustment is performed. The magnification of the output image in the main direction and the sub direction is changed according to the amount. Thereby, the magnifications of the main direction and the sub direction of the output image can be matched. As a result, even when the image of the original is rotated by 90 degrees or 270 degrees in the adjusted state, it is possible to obtain an output image having no discomfort in vertical and horizontal magnifications and sizes.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing the overall configuration of a digital copying machine that is an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a control unit.

FIG. 3 is a block diagram showing a configuration of a scanning system and an image signal processing unit.

FIG. 4 is a block diagram showing a configuration of a memory unit section.

FIG. 5 is a diagram showing a display screen of an operation panel in a magnification fine adjustment mode.

FIG. 6 is a flowchart showing a process for a key operation from the operation panel in a magnification fine adjustment mode.

FIG. 7 is a flowchart showing a process for controlling an output magnification in a magnification fine adjustment mode.

FIG. 8 is a flowchart showing an example of a subroutine for setting a magnification in a main direction.

FIG. 9 is a flowchart showing an example of a sub-direction magnification setting subroutine.

FIG. 10 is a flowchart showing another example of a sub-direction magnification setting subroutine.

FIG. 11 is a diagram showing an original and an image on a copy sheet when finely adjusted so as to slow down the scanning speed of the original by a key operation from the operation panel.

[Explanation of symbols]

 1 to 5 ... CPU 16 ... CCD 19 ... Scanner 30 ... Memory unit section 304 ... Image memory 307 ... Rotation processing section 309 ... Magnification processing section M1 ... Main motor M2 ... Scanner motor

Claims (1)

[Claims] 1. An image of a document read by a reading unit by changing a scanning speed of the document by the scanning unit or a system speed of an image forming system, and a reading unit which reads a document in a scanning line sequential manner and outputs image data. Adjusting means for adjusting the output magnification in the sub-scanning direction, storing means for accumulating image data output from the reading means, rotating means for rotating the image representing the original by processing the image data, and rotating means. In an image forming apparatus having an output means for outputting the rotated image at a predetermined magnification, a detecting means for detecting an adjustment amount by the adjusting means, and a rotating means for rotating the image by 90 degrees or 270 degrees, Magnification control means for adjusting the magnification in the main direction and the sub-direction in the image output by the output means based on the adjustment amount. Image forming apparatus characterized by.