JPH08274970A - Image forming device - Google Patents

Abstract

PURPOSE: To match images of odd and even numbered pages (not inverted) even in the case of a double side original including a photograph or illustration without a character or with whatever shap the double side original is set to a platen and to keep the matching performance of the image even with magnification or reduction. CONSTITUTION: An original filing side designation section 31 designates a filing side and an original image direction designation section 32 designates an image direction. When a double side original 4 is set to an original tray 3 and a start key 33 is closed, an original set direction detection section 34 detects a set direction of the double side original 4 and a data output form judging section 37 judges a data output form. A rotary angle judging section 38 judges a rotation angle of the image signal read from the original 4 based on the designation, detection and judgment as above. An image rotation section 39 rotates the read image signal and stores the resulting signal to a 1st memory 42. The image signal is read from the 1st memory 42 and outputted for copying, facsimile transmission or host scanning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, and more particularly to an image forming apparatus in which an output image on the front side and a reverse side of an output image are not reversed regardless of the orientation of a double-sided original.

[0002]

2. Description of the Related Art Rectangular double-sided originals read and scanned by an image forming apparatus are classified into types A to D below (details will be described later). (1) Type A long-edge binding with the image facing up (2) Type B long-edge binding with the image facing horizontally (3) Type C short-edge binding with the image facing up (4) type D short-edge binding with the image facing horizontally

When double-sided reading is performed using a reversing device for reversing the double-sided original in the sub-scanning direction, the read image may be read depending on how the double-sided original is set on the platen.
1 between odd page (first side) and even page (second side)
An image reversal of 80 ° occurs. Therefore, when performing double-sided document reading / scanning for page composition, facsimile transmission, host scanning, and copying, LEF (Long Edge Fe) is used according to the type of document from type A to D.
ed) and SEF (Short Edge Fee)
A double-sided original must be set by selecting one suitable setting method from d).

That is, it is necessary to set the type A and B originals in the LEF, and set the type C and D originals in the SEF to prevent image inversion (details will be described later).

However, when enlarging / reducing an image at the same time, the original must be set to SEF.
In the double-sided originals of types A and B, 180 ° inversion occurs in the read images of the odd page and the even page. In order to prevent this, the operator must set the original by changing the orientation of the image between the odd-numbered page and the even-numbered page without using the automatic original reversing device, which makes the operation very troublesome.

As a conventional image forming apparatus of the above-mentioned double-sided original reading type, for example, there are those disclosed in Japanese Patent Application Laid-Open Nos. 5-110814 and 5-232760.

The image forming apparatus disclosed in Japanese Patent Application Laid-Open No. 5-110814 detects the direction of a character by character recognition from an input image and changes the direction of the output image based on the detection result to change the direction of the copy image. I have it.

The image forming apparatus disclosed in Japanese Unexamined Patent Publication No. 5-232760 detects the orientation of the paper and the orientation of the document, and rotates the output image based on the detection results. As a result, correct double-sided copying can be obtained regardless of how the original is placed.

[0009]

However, according to the conventional image forming apparatus, according to Japanese Unexamined Patent Publication No. 5-110814, it cannot be applied to a manuscript only for photographs or illustrations in which characters cannot be recognized, so that the use is limited. In Japanese Patent Laid-Open No. 5-232760, for example, as described above, when a double-sided document of types A and B is set in SEF, the orientations of the document and the paper are detected. One of the read images that can be generated but on even pages
Since the 80 ° inversion cannot be detected, the inversion of 180 ° occurs in the output images of the odd page and the even page, and therefore, the inversion of the image that occurs at the scaling requiring the setting of SEF cannot be avoided. is there.

Therefore, it is an object of the present invention to provide an image output device in which output images on both sides are not reversed even if a document of a photograph or an illustration whose characters cannot be recognized.

Another object of the present invention is to align the output images of the odd page and the even page even if the read image of the even page is inverted by 180 °, thereby reversing the image at the time of scaling. An object of the present invention is to provide an image forming apparatus that prevents the above.

[0012]

In order to achieve the above object, the present invention automatically reverses a document to scan and scan both sides of the document, and applies rotation processing to the image signal obtained by this scanning. In an image forming apparatus for forming an image in which both sides are aligned, a document binding side designating unit for designating a binding side for binding the document as a long side or a short side,
A document image direction designating unit that designates the direction of the image of the document, a document setting direction detecting unit that detects the setting direction of the document set for scanning, and an output form of the aligned image are determined. Output form determining means, a rotation angle determining means for determining a rotation angle required for the rotation processing based on the binding side, the orientation of the image, the setting direction, and the output form, and the rotation angle is 0 °.
A first memory for storing the image signal, a second memory for storing the image signal in which the rotation angle is other than 0 °, and a rotation process of the rotation angle for the image signal stored in the second memory. Image rotation means for applying the rotation image signal to generate a rotation image signal, and stores the image signal in the first memory and the second memory according to the rotation angle, and stores the rotation image signal in the first memory, There is provided an image forming apparatus comprising a control unit for reading out the image signal according to the output form from a first memory.

In the above image forming apparatus, there may be provided means for designating the type of the original set as the original set for reading and scanning, that is, the single-sided original or the double-sided original.
When this means is provided, the set original is designated as a double-sided original, so that the original is inverted, and a predetermined operation is performed thereafter, so that an image in which both sides are aligned is output. If this means is not provided, for example, when the binding side is designated by the document binding side designating means, the control section may determine that a double-sided document is set.

[0014]

Function: A double-sided original is set on the original tray for scanning for reading. The set direction of the set document is detected by the document setting direction detecting means. The detection of the setting direction is performed on the document tray, but may be performed on the platen glass or during transportation. Before or after this, the operator designates whether the binding side of the document is the long side or the short side from the document binding side designating means, and whether the image is oriented upward from the document image direction designating means. , Or landscape orientation. At the same time, the output form determining means determines the image output form according to the reception size of the facsimile device or the size specified by the host, for example, when the image recording paper or the destination of the image is the facsimile device or the host. . In this way, when the binding side of the document, the orientation of the image of the document, the setting direction of the document, and the output form of the image are specified, detected, and determined, the rotation angle determination means rotates the image based on these information. Determine the angle.

The rotation angle of the image is used in the rotation processing applied to the image signal obtained by the reading and scanning, and this rotation processing prevents the output images of the first surface and the second surface from being reversed. When the rotation angle of the image signal is determined to be 0 °, it is stored in the first memory, and when the rotation angle is other than 0 °, it is stored in the second memory. The image signal stored in the second memory is rotated by the image rotating means by a predetermined rotation angle to be a rotated image signal, which is stored in the first memory. The control means stores the image signal in the first memory and the second memory according to the determined rotation angle, and when there is an output command, reads the image signal from the first memory and provides the output image.

[0016]

1 shows an image forming apparatus according to an embodiment of the present invention, which comprises an image signal generating section A, an image recording section B, and a sheet feeding / conveying section C.

The image signal generating section A has a document tray 3 on which a document 4 is placed and an ADF (Auto) for automatically supplying the document 4.
(Matic Document Feeder) 2
A platen glass 7 on which the platen cover 1 is opened and a document is placed, a document reversing unit 5 for reversing the document 4 for double-sided reading, a document ejection tray 6 for ejecting a document scanned and scanned, and an ADF reading glass. 7a, normally (at idle), the standby position X is directed, and when the platen is read, it moves to illuminate the platen read position Y, and AD
When reading F, move in the opposite direction and move to ADF reading position Z
A light source unit 8 for irradiating light, a reflection mirror 9 that moves together with the light source unit 8 and reflects and guides the reflected light from the document 4 to a predetermined optical path, a focusing lens 10 that focuses the reflected light from the reflecting mirror 9, and a focusing lens. CCD image sensor 11 for generating an image signal by light reflected from the document from the lens 10.
have.

The image recording section B includes a CCD image sensor 1
Memory that stores the image signal generated in 1 (not shown)
An image signal is input from the laser beam scanner unit 17 which emits a laser beam modulated by the image signal.
A photosensitive drum 18 for forming a toner image, a charging unit 16 for charging the photosensitive drum 18 before the toner image is formed,
A developing unit 19 for developing an electrostatic latent image formed by a laser beam after being charged with toner, and a photosensitive drum 18.
A transfer unit 13 that transfers the upper toner image onto the sheet supplied from the sheet supply / conveyance unit C, and the photosensitive drum 18 after the transfer.
A cleaning unit 15 for cleaning the sheet and a fixing unit 12 for fixing the toner image on the sheet.

The paper feeding / conveying / discharging section C stores a plurality of paper trays 20 for accommodating various sizes of paper, a paper reversing section 14 for reversing the paper for double-sided copying, and a paper subjected to reversal processing after one-sided copying. It has a paper double-sided module 22 for supplying the transfer unit 13 again and a discharge tray 21 for discharging the paper for which image recording has been completed.

FIG. 2 is a control block diagram in the image forming apparatus according to one embodiment of the present invention. The control unit 100 has a configuration for inputting a signal from the signal generation block and controlling the corresponding functional block ( The same reference numerals as in FIG. 1 indicate the same parts).

As the signal generating block, a document binding side designating section 31 for designating whether the side to which the document 4 is bound is the long side or the short side, and the image of the document 4 placed on the document tray 3 are conveyed. A document image direction designating section 32 for designating the same direction (sideways) or a right angle (upward), a key group 33 for generating a start signal, a ten-key signal, etc., and a document 4 set on the document tray 3 When the long side is orthogonal to the transport direction, LEF (Long Edg) is set as the set direction.
e Feed) signal is output, and when the short side is orthogonal to the transport direction, SEF (Short Ed) is set as the set direction.
a document setting direction detecting unit 34 that outputs a signal of “Feed”, a sensor group 35 that outputs various sensor signals according to the process of image recording, a mode of recording a read image on a sheet, or a command of page synthesis, A data output form determination unit 37 for determining a reception size of the facsimile device or a size specified by the host and outputting a form signal,
A rotation angle determination unit 38 for determining the rotation angle of the read image necessary to prevent the output images on both sides from being reversed in consideration of the morphological signal.

As functional blocks, in addition to the document tray 3, the document reversing unit 5, and the document discharging unit 6 described in FIG. 1, an image for rotating the read image according to the rotation angle of the rotation angle determining unit 38. The rotation unit 39 and the first memory 42 (encoding unit 42 that stores the read signal with the rotation angle of 0 °)
a, including a decoding unit 42b and a page synthesizing unit 42c),
A second memory 41 that stores a read signal with a rotation angle other than 0 °; a transfer destination switching unit 40 that switches the transfer destination to the first and second memories 42 and 41 according to the rotation angle;
It has an output unit 43 that outputs an image by recording on paper, displaying on a display, or the like.

The image forming apparatus described above is connected to the facsimile controller 50 and the host controller 60.

The facsimile control device 50 inputs an image (reads and scans) or outputs (prints) an image, an image input / output unit 54, an encoder for encoding a signal to be sent to a line, and an encoder for decoding a received signal. It has a decoding unit 51, a MODEM 52 that modulates or demodulates a signal, a line control unit 53 that controls connection to a line, and a control unit 55 that controls the above units.

The host controller 60 develops an image signal input from the host into an image (prints, displays, stores in a memory, etc.), or an image expansion unit 61 that expands an image signal from the image forming apparatus into an image signal for the host. A signal transmission / reception unit 62 for controlling exchange of various signals with the host, and a control unit 63 for controlling these.

3 (A) to 3 (D) show how the originals 4 set on the original tray 3 are set. As described above, these originals are type A, type B, type C, and type D, respectively. Called double-sided manuscript. In the figure, numbers represent images, two small white circles on each page represent a binding portion, page 1 has images 1, page 2 has pages 2, page 3 has pages 3, and page 4 has images 4.

The operation of the above configuration will be described with reference to the flowchart of FIG.

The original 4 is set on the original tray 3 (step 1). The set original 4 is a type B double-sided original as shown in FIG.
Is. When the document setting direction detector 34 detects LEF and outputs a detection signal to the controller 100, the controller 100 stores it (step 2). When the operator designates the long side as the original binding side, the upward direction as the original image direction, and the page combination execution from the original binding side designating section 31, the original image direction designating section 32, and the key group 33 of the panel, the control section 100 respectively Is stored (steps 3 and 4). Next, when the start key of the key group 33 is turned on (step 5), the data output form determination unit 37 sets the output form to LEF based on the stored contents of the page combining execution.
(Step 6).

At the same time, the control unit 100 controls the rotation angle determination unit 3
An image rotation angle of one page or two pages is determined from the document image direction (upward), output form (LEF), document binding side (long side), and document setting direction (LEF). The original read image direction (upward) in FIG.
As is clear from the output form (LEF) in the upper part of (D), the image rotation angle of page 1 and page 2 is 0 ° (step 7). When the image signal for one page is input from the CCD image sensor 11 (step 8), the control unit 100 controls the transfer destination switching unit 40 to transfer it to the first memory 42 (step 9), and the one page is stored in the first memory 42. The image signal of is stored (step 10). When the reading and scanning of one page of the original 4 is completed, the original inverting section 5 reverses the original 4 and two pages are read and scanned as shown in FIG. 3B (step 14). The obtained image signal has an image rotation angle of 0 ° as shown in the upper part of FIGS. 5B and 5D (step 15), 1
It is stored in the first memory 42 in the same manner as the page (steps 16 and 17). When the image signal of each page is stored in the first memory 42, it is encoded and stored in the encoding unit 42a to reduce the memory capacity.

After being stored in the first memory 42, the image signals of page 1 and page 2 are page-synthesized by the page synthesizing section 42c based on the designation of execution of page synthesizing (step 21) and stored in the first memory 42. To be done. The page-combined image is shown in the upper part of FIG. The above steps are repeated until the final page (step 2
3). The page-combined image signal is read from the first memory 42 according to the command and transferred to the facsimile controller 50 or the host controller 60 (step 2).
4).

On the other hand, when a copy command is issued, the image signal stored in the first memory 42 is decoded by the decoding unit 42 and output to the output unit 43. The operation of the output unit 43 corresponds to, for example, the following operation. First, the decoded signal is output to the laser beam scanner unit 17. The laser beam scanner unit emits a laser beam modulated according to an image signal to the photoconductor drum 18 charged by the charging unit 16, and the photoconductor forms an electrostatic latent image on the drum 18. After that, according to a normal copying process, the first and second page images of the page-combined document are recorded on the first side of the sheet supplied from the sheet tray 20. The sheet that has received the recording on the first side is reversed by the sheet reversing unit 14,
The third side and the fourth side of the original which is supplied from the paper double-sided module 22 to the copying unit 13 again and has the page combined on the second side thereof.
The image of the page is recorded. Naturally, the image signals of pages 3 and 4 of the original are subjected to decoding processing from the first memory 42 and supplied to the laser beam scanner unit 17, and the laser beam scanner unit 17 exposes the laser beam modulated according to the image signal. It is emitted to the body drum 18.
In this way, the paper on which the images of the first and second pages of the document are recorded on the first side and the images of the third and fourth pages of the document on the second side are discharged to the paper discharge tray 21.

In the above embodiment, various commands are input from the blocks 31, 32, 33, etc. of FIG. 2, but the facsimile controller 50, the host controller 60, etc.
6 may be input.

In FIG. 5A, the type B document is LEF.
However, when an original of type A (FIG. 3 (A)) is set to LEF, the output form is LEF (FIG. 5).
5D, the original read image is as shown in FIG. 5C, and page composition is as shown in the lower part of FIG. 5F.

When the output form of the originals of types A and B is SEF as shown in FIG. 5 (E), the rotation angle of the image is as described in FIG. 5 (E). become. The image rotation will be described later.

Further, in the determination of the output form in step 6, when the image signal is transferred to the facsimile control device 50, the facsimile reception size (protocol) of the partner device (receiver) which communicates through the line from the facsimile control device 50. ), The host controller 60
When transferring to, it is determined by the size specified by the host.

FIGS. 6A to 6E show image rotation by the image rotation unit 39. As described above, the image signal requiring rotation is stored in the second memory 41, and the image rotation unit 39
After being rotated by 90 °, 180 °, and 270 ° by the above, they are stored in the first memory 42. It is read from the second memory 41 by the main scanning and the sub-scanning indicated by X and Y according to the respective rotation angles (FIG. 6C to (E)), and is read to the first memory 42 based on the normal scanning. Stored. As a result, the rotated image signal is stored in the first memory 42.

FIG. 7A shows the case where the type B document 4 is set in the SEF, and as shown in FIG. 7B, a 180 ° inversion image is generated in the document read image of even pages. When the output form is determined as shown in the upper part of FIG.
One page requires 90 ° and two pages requires 270 °. Returning to the flowchart of FIG. 4, since the rotation angle of one page is not 0 ° (step 8), the transfer destination switching unit 40
Sets the second memory 41 as the transfer destination (step 11) and stores the image signal in the second memory 41 (step 11).
The image rotation unit 39 reads the image signal of one page from the second memory 41 as shown in FIG.
And is stored in the first memory 42 (step 13). Step 2 for the image signal of page 2
In step 21, a rotation of 270 ° is provided. The rotation of 270 ° is realized as shown in FIG.

The lower part of FIG. 7C, FIG. 7D, and the lower part of FIG. 7E correspond to the case where the type A double-sided original is set in the SEF as described in FIG.

Similarly, FIGS. 8 and 9 will be described.

FIG. 8 (A) shows the case where the type C original 4 is set in the LEF, and corresponds to the upper stage of FIG. 8 (B), FIG. 8 (D), and the upper stage of FIG. 8 (E). When the document 4 of D is set in the LEF, it corresponds to the lower stage of FIG. 8C, FIG. 8D, and the lower stage of FIG. 8E.

FIG. 9A shows the case where the type 4 original 4 is set in the SEF and corresponds to the upper stage of FIGS. 9B and 9D and the upper stage of FIG. When the document of D is set on the SEF, it corresponds to the lower part of FIG. 9C, FIG. 9D, and the lower part of FIG. 9E.

Table 1 can be obtained by arranging the examples described above.

[Table 1]

[0043]

As described above, according to the image forming apparatus of the present invention, the read image is obtained based on the binding side of the specified original, the image direction of the original, the detected setting direction of the original, and the determined data output form. Since the rotation angle is determined, it is possible to form an output image in which the odd number page and the even number page are aligned regardless of the orientation of the original. Therefore, the enlargement / reduction of the image can be performed on the odd-numbered page and the even-numbered page in parallel with the operations of the facsimile transmission, the host scan, and the copy without inverting the image.

[0044]

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

3A to 3D are explanatory views showing double-sided originals of types A to type (D).

FIG. 4 is a flow chart showing the operation of the embodiment of the present invention.

5A to 5F are explanatory diagrams showing images when a double-sided original of types A and B is set in LEF in one embodiment of the present invention.

6A to 6E are explanatory views showing image rotation.

7A to 7E are explanatory diagrams showing images when a double-sided original of types A and B is set on SEF in one embodiment of the present invention.

8A to 8E are explanatory views showing images when a double-sided original of types C and D is set in LEF in the embodiment of the present invention.

9A to 9E are explanatory views showing images when a double-sided original of types C and D is set on SEF in one embodiment of the present invention.

[Explanation of symbols]

 1, Platen Cover 2, Automatic Document Supply Unit (ADF) 3, Document Tray 4, Document 5, Document Reversing Unit 6, Document Ejection Tray 7, Platen Glass 8, Light Source Unit 9, Reflection Mirror 10, Focusing Lens 11, CCD Image Sensor 12, fixing unit 13, transfer unit 14, paper reversing unit 15, cleaning unit 16, charging unit 17, laser beam scanner unit 18, photosensitive drum 19, developing unit 20, paper tray 21, paper ejection tray 22, paper both sides Module 31, document binding side designation unit 32, document image direction designation unit 33, key group 34, document setting direction detection unit 35, sensor group 37, data output form determination unit 38, rotation angle determination unit 39, image rotation unit 40, Transfer destination switching unit 41, first memory 42, second memory 42a, encoding unit 42b, decoding unit 42c, Over di synthesis unit 43, output unit 50, the facsimile device 60, the host

Claims (1)

[Claims] 1. An image forming apparatus for automatically reversing an original, scanning and scanning both sides of the original, and subjecting an image signal obtained by this scanning to rotation processing to form an image in which both sides are aligned, A document binding side designating unit for designating a binding side for binding the document as a long side or a short side, a document image direction designating unit for designating an orientation of an image of the document, and setting the document set for reading scanning. Document setting direction detecting means for detecting the direction, output form determining means for determining the output form of the aligned image, and the rotation based on the binding side, the image direction, the setting direction and the output form A rotation angle determination unit that determines a rotation angle required for processing, a first memory that stores the image signal with the rotation angle of 0 °, and a rotation angle other than 0 ° A second memory for storing the image signal; an image rotation means for generating a rotated image signal by performing a rotation process of the rotation angle on the image signal stored in the second memory; and the image signal for the rotation angle. The rotation image signal is stored in the first memory and the second memory, and the rotation image signal is stored in the first memory, and the image signal corresponding to the output form is read from the first memory. Image forming apparatus characterized in that