JPH09219787A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the cut of the head image of an original and to shorten the time required for the switching processing of image information by defining the head of the final line of the original as a standard when the picture information is switched between the main scanning and subscanning directions. SOLUTION: The data sent from a circuit are stored in an SAF memory 623 via an NCU 626 and a modem 625. Then an image is rotated and expanded by a rotary unit 621 when the data are transferred to an image memory 620 from a compression/expansion unit 622 as long as the higher print efficiency is secured through the A4 or B5 lateral rotation, etc., in an expansion mode. In this case, the rotation start position of the image is set at a position equivalent to the head of the final line of an original set in its subscanning direction. If the picture information quantity of the subscanning direction is larger than the length of the subscanning direction, the picture information is cut at the rear end of the original in its subscarming direction. On the other hand, a picture information is masked at the tip side of the original in its subscanning direction when the picture information quantity of the subscanning direction is smaller than the length of the subscanning direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus having a page memory for accumulating image information of read originals.

[0002]

2. Description of the Related Art For example, an A4 original is scanned at 297 m in the main scanning direction.
When the original is read and transmitted by the scanner so that the distance is m and the sub-scanning direction is 210 mm, it is transmitted in the main scanning A3 width. At this time, if the partner receiver's capability is only B4,
It will be reduced. To prevent this, the operator sets the document on the ADF (automatic document feeder) so that the main scanning direction is 210 mm and the sub-scanning direction is 297 mm, and the ADF is provided with guidance. However, if the operator makes a mistake in setting the original, the size must be reduced. To avoid this, A4
The original is 297 mm in the main scanning direction and 210 mm in the sub scanning direction.
Even when set to, the image information in the main scanning direction and the sub-scanning direction are exchanged at the time of storage to transmit in the main scanning A4 width. As a rotation processing method of image data, a method of using a two-dimensional memory that rotates in an area unit of 16 × 16 bits is generally used.

However, in order to rotate a large amount of image data, it is necessary to rearrange the rotated image in units of 16 × 16 bits, which requires a lot of time.

[0004]

An A4 document is set in a document feeder (ADF) having a straight conveying path so that it is 297 mm in the main scanning direction and 210 mm in the sub-scanning direction, and is fed by a scanner. When reading, the image information actually transferred to the memory is affected by the ADF sheet feeding accuracy,
The image information in the sub-scanning direction is not exactly 210 mm worth of image information, and an excess or deficiency occurs. Even when the operator places a document under the pressure plate, it is affected by the movement accuracy of the scanner. When the image information in the sub-scanning direction is exceeded, the image information at the leading end or the trailing end in the sub-scanning direction may be cut and the image information in the main scanning direction and the image information in the sub-scanning direction may be exchanged. If the image information in the sub-scanning direction is insufficient, it is necessary to add dummy image information to the front end or the rear end in the sub-scanning direction.

A first object of the present invention is to shorten the rotation processing time. Since the paper size on the receiver side and the feeding direction on the transmission side do not match, the A4 horizontal document is reduced to A4 size.
The second purpose is to improve the inconvenience such as outputting on vertical paper, or outputting A4 vertical original on two A4 horizontal sheets, and releasing the restriction of the original setting posture. The third purpose is to reduce the total processing time of image data rotation and compression encoding, and the fifth purpose is to eliminate unnecessary rotation processing.

[0006]

According to a first aspect of the present invention, an original is read by a scanner, image information of the read original is stored in an image information storage memory, and then image information in a main scanning direction and a sub scanning direction is stored. In a facsimile apparatus having a function of exchanging, the image rotation start position is set to correspond to the beginning position of the last line of the document in the sub-scanning direction, and the image information amount in the sub-scanning direction exceeds the length of the document in the sub-scanning direction. In this case, when the image information cutout is located at the trailing end side of the document in the sub-scanning direction and the amount of image information in the sub-scanning direction is not sufficient for the length of the document in the sub-scanning direction, the image information mask is set to the leading end side of the document in the sub-scanning direction. It is characterized by According to this, when the image information in the main scanning direction and the image information in the sub-scanning direction are exchanged, since the beginning of the last line of the document is used as a reference, the image at the beginning of the document is not cut off, and
Since it is not necessary to write white data in the entire page memory,
The time required for the replacement process can be shortened.

A second aspect of the present invention is a facsimile having a function of reading an original with a scanner, storing image information of the read original in an image information storage memory, and then exchanging image information in the main scanning direction and the sub scanning direction. The apparatus is characterized in that the rotation start position of the image is at the beginning of the leading line and the image information break and the image information mask are at the trailing end side of the document in the sub-scanning direction. According to this, the image at the leading edge of the document need not be cut off.

A third aspect of the present invention is a facsimile having a function of reading an original with a scanner, storing image information of the read original in an image information storage memory, and then exchanging image information in the main scanning direction and the sub scanning direction. The apparatus is provided with a means for selecting whether the rotation start position of the image is the position corresponding to the start position of the last line of the document in the sub-scanning direction or the start position of the start line. This improves usability.

A fourth aspect of the present invention is a facsimile apparatus having means for compressing and coding image data,
A means for selecting whether to compression-encode the image data as it is, or to perform compression-encoding after performing rotation processing in m × n bit units, where m and n are numbers of 2 or more, respectively. It is characterized by having. According to this, the original data input in the A4 horizontal direction at the time of transmitting to the memory of the facsimile apparatus is converted into encoded data in the form of A4 length by converting the encoded data into compression data following the rotation processing of the image data. It is possible to select, and it is possible to select. It is possible to prevent the A4 horizontal document from being reduced and output to A4 vertical paper, and the A4 vertical document to be divided and output to two A4 horizontal papers.

In addition to the fourth aspect, in the fifth aspect of the present invention, when the receiver side can record up to A3 width when transmitting an A4 length original, rotational compression is performed and only recording up to A4 width is possible. In this case, a means for performing normal data compression without rotation is provided. According to this, since the presence / absence of rotary compression is determined after checking the function on the receiver side, unnecessary rotation processing need not be performed.

According to a sixth aspect of the present invention, the selecting means of the fourth aspect includes a selection switch (SWri). According to this, since the user can select the presence / absence of the rotary compression, it is possible to read all the A4 size and the transmission originals in the A4 horizontal direction in the same sense as making a copy. You do not have to change the orientation of the original set.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an outline of a mechanical portion according to an embodiment of the present invention. This mechanism is for a composite digital copier. This digital copying machine has a copying machine main body 1, an automatic document feeder (hereinafter ADF) 100, a 3-bin sorter 200, and a paper feeding unit (hereinafter bank) 300.

The copying machine main body 1 has a scanner, an image processing section, a plotter and the like. The scanner is composed of a contact glass 10 on which a document is placed and an optical scanning system. The optical scanning system is an exposure lamp 11. , The first mirror 12,
It is composed of a lens 15, a full-color CCD 16 and the like. First equipped with exposure lamp 11 and first mirror 12
The carriage moves at a constant speed by being driven by a stepping motor when reading a document. Second mirror 1
The second carriage equipped with the third and third mirrors 14 is driven by a stepping motor at the time of reading an original and moves at a speed half that of the first carriage.

A document (not shown) on the contact glass 10 is optically scanned by the first carriage and the second carriage, and the light source 11, the first mirror 12, and the second mirror 1 are scanned.
3, through the third mirror 14 and the lens 15, CCD1
An image is formed on 6 and photoelectrically converted. The image signal separated into each color of red (R), green (G), and blue (B) by the CCD 16 is digital data (color image data) by an AD converter.
Output to an image processing unit that performs image processing. The image processing unit applies various image processing (2) to color image data.
Value conversion processing, halftone processing, scaling processing, editing processing, color conversion processing, etc.), and converted into color recording data.

The writing unit comprises a laser output unit 20, an fθ lens 21 and a mirror 22. Inside the laser output unit 20, a laser diode which is a laser light source and a polygon motor are provided. The black recording data output from the image processing unit is converted into a laser beam having an intensity corresponding to this data, shaped by a collimating lens, an aperture, and a cylinder lens into a light beam of a fixed shape, and applied to a polygon motor. Is output from the laser output unit 20. The laser light output from the laser output unit 20 is fθ
The photoconductor drum 30 is irradiated with light through the lens 21 and the mirror 22. Further, the laser light that has passed through the fθ lens 21 has a main scanning synchronization detection signal PM that is arranged outside the image area.
The beam sensor for generating SYNC is irradiated.

The red recording data output from the image processing unit is buffered so as to match the writing position with the black recording data, sent to the LED writing unit 31, and irradiated onto the photosensitive drum 30.

The ADF 100 feeds originals one by one to the contact glass 10 of the copying machine main body 1 and ejects them after copying. The originals are stacked on the original feeding table 101 and aligned in the width direction by the side guides. The originals on the original feeding table 101 are separated from the lowermost original by a paper feeding roller 102 and fed one by one, and are fed onto the contact glass 10 of the copying machine main body 1 by a conveyor belt 103. After the document on the contact glass 10 has been read, the discharge belt 105 and the discharge roller 104 are used to discharge the discharge tray 105.
Is discharged to

When reading originals on both sides, the original feeding table 1
01 on the double-sided document
02, one sheet at a time,
Then, the sheet is sent onto the contact glass 10 of the copying machine main body 1 by means of 3 and is set on the contact glass 10 after the original is inverted by the reversing claw 106. After scanning the back of the original,
The sheet is conveyed by the conveyor belt 103, and is set on the contact glass 10 after the document is reversed by the reversing claw 106. After the reading of the front surface of the document is completed, it is discharged onto the discharge tray 105 by the conveyor belt 103 and the discharge roller 104.

First tray 50, second tray 310, third tray
The transfer sheets stacked on the tray 320 and the fourth tray 330 are fed by the first sheet feeding device 51, the second sheet feeding device 311, the third sheet feeding device 321, and the fourth sheet feeding device 331, respectively. It is transported by the vertical transport unit 340 and the main body vertical transport unit 60. When the leading edge of the transfer sheet is detected by the registration sensor 52, it is conveyed for a certain period of time and then stopped by the registration roller 53.

This transfer paper is supplied with an image valid signal (FGAT).
E) is sent out onto the photosensitive drum 30 at the tip of
The image is transferred by the transfer charger, the transfer paper is separated from the photoconductor, and then conveyed by the conveyance device 54, fixed by the fixing device 55 having a fixing roller and a pressure roller, and ejected by the paper ejection roller 56 to the 3-bin sorter 200.
Is discharged to

In the black image formation, the photosensitive drum 30 charged by the first charging device is irradiated with a laser beam to form an electrostatic latent image, and the black developing device 32 develops the electrostatic latent image. Thereafter, the photosensitive drum 30 is charged again by the second charging device, the second color electrostatic latent image is formed by the LED array 31, and the electrostatic latent image is developed by the second developing device 33.

When performing double-sided printing using the double-sided unit 40, the transfer paper ejected from the fixing device 55 is guided to the double-sided conveyance path 41 by the switching claw 57, passes through the feed roller 42 and the separation roller 43. Stacked on a double-sided tray. The transfer sheets accumulated on the tray come into contact with the feed roller 42 when the tray moves up, and the feed roller 42 rotates so that the main body vertical conveyance unit 60.
And is re-fed to the registration roller 53, and then printing is performed on the back surface.

The 3-bin sorter 200 includes a first paper ejection tray 201, a second paper ejection tray 202, and a third paper ejection tray 20.
3. There is a reversing dedicated tray 204, and the transfer paper can be reversed and output to each tray.

In the case of front surface discharge, the transfer paper discharged from the copying machine main body 1 is guided in the discharge tray direction by the switching claw 207 and discharged to a preset tray.
When discharging to the second discharge tray 202, the second tray switching claw 205 operates, and when discharging to the third tray switching claw 203, the third tray switching claw 206 operates to guide the transfer paper. .

When the sheet is reversed and discharged, the switching claw 207 is used.
When the trailing edge of the transfer paper passes the reversal detection sensor 208 by being guided toward the reversal tray 204 by the conveyance roller 20,
9 is reversed, is guided in the direction of the discharge tray, and is discharged to a preset tray.

The first paper discharge tray 201 is equipped with a mechanism for shifting the tray back and forth and a mechanism for vertically shifting the tray. The front-rear shift mechanism is used when sorting transfer sheets, and the up-down mechanism is used for stacking a large amount of transfer sheets while ensuring sheet alignment.

FIG. 2 shows the operation unit 4 of the above-mentioned digital copying machine.
00 is shown. A liquid crystal display unit (LCD) 401 of 400 × 256 dots and a touch panel are provided in the center of the operation unit. The liquid crystal display unit 401 displays the functions (copy, FAX) incorporated in the machine, and the user operates the machine according to this display. To switch the function (copy / FAX), the function switch key 412,
413.

On the right side of the liquid crystal display, copy / FA
Various numeric keys 402 commonly used in X, clear / stop key 403, start key 404, program key 405, job recall key 406, mode clear /
Various keys such as preheat key 407 and interrupt key 408,
Pause / redial key 409 used exclusively for FAX,
Keys such as a shortening key 410 and a reception key 411 are arranged.

On the left side of the liquid crystal section, a FAX switch key 412, a copy switch key 413, and an initial setting key 4 are provided.
14, a guidance key 415, and an LCD density adjustment volume 416 are provided respectively.

Further to the left of these keys, the FAX
A dedicated display unit 417 is provided. This display has various LEDs that indicate communication, memory full, etc.
And a LCD of 40 characters (20 characters x 2 lines) for displaying the communication status is provided.

FIG. 3 shows the configuration of the electrical equipment of the above-mentioned digital copying machine. The control of the copying machine main body 1 is performed by a liquid crystal display of the operation unit 400, various LED controls, an operation unit controller 500 that performs various key input controls, a main controller 501 that performs paper feed, conveyance, fixing, double-sided, process control, etc., a scanner. Image processing apparatus 50 for controlling reading and image processing
2, ADF control device 503, sorter control device 504,
It is configured by a paper feed tray control device 505, a FAX control device 506 that performs FAX transmission / reception management, file management, a G3 control device 507 that performs G3 protocol control, and a G4 control device 508 that performs G4 protocol control.

FIG. 4 shows the configuration of the image processing apparatus 502. When the CPU 600 of the image processing apparatus 502 receives a reading start instruction from the main controller 501 (FIG. 3), the CPU 600 transmits the instruction to the scanner control circuit 604. The scanner control circuit 604 turns on the exposure lamp 11,
By operating the motor 605, the first carriage and the second carriage are moved to the reading reference position,
The position sensor 603 starts reading after detecting that the reference position has been reached. At this time, a sub-scanning valid period signal FGATE (active at the start of reading, negative at the end of reading) is generated and sent to the timing control circuit 606. The timing control circuit 606 generates and outputs the image synchronizing clock CLK, the main scanning synchronizing signal LSYNC, and the main scanning valid signal LGATE.

Document 6 placed on contact glass 10
07 is illuminated by the light source 11 and the reflected light is a color CCD
An analog image signal which is imaged on the color image sensor 16 and is separated from the color CCD 16 into red (R), green (G), and blue (B) is amplified / corrected by the signal processing circuit 608 and digitally converted by the AD converter 609. It is converted into a value signal (color image data), subjected to shading correction by the shading correction circuit 610, and sent to the image processing unit 611.

The image processing unit 611 performs basic image quality processing such as MTF correction, γ correction, black image generation, binarization processing, and halftone processing, and digital-specific image processing such as scaling, editing, and marker detection. To output black data DATA0 to 7 and color data DATAC. The image data output from the image processing unit 611, the synchronization signal generated by the timing control circuit 606, and the write reference signal PMSYNC are
It is input to the image selector 612.

In the case of copying, a black image is sent from the writing control unit (black) 613 to the LD 614, and a color image is sent from the writing control unit (color) 615 to the LED 61.
Then, the image is formed by being sent to the photosensitive drum 6 and irradiated onto the photosensitive drum.

When performing FAX transmission, the selector 61
2 is transferred to the FAX memory inside the main controller 501. Further, the FAX reception output expands the data received from the line and expands it in the FAX memory, and then is input to the image selector 612 together with the image data and the synchronization signal and is written.

FIG. 5 shows the flow of image data during FAX transmission and reception. At the time of FAX image storage / transmission, the image data read from the scanner is subjected to various kinds of image processing by the image processing device 502 and then stored in the image memory 620 on the main control device 501 from the selector 612.
Then, it is compressed into a compression code (MH, MR, MMR) designated by the compression / expansion unit 622, and the FAX control device 5
It is stored in the SAF memory 623 on 06.

At this time, when it is more efficient to transmit the data stored in the image memory 620 in a rotated manner such as A4 landscape or B5 landscape, when data is passed from the image memory 620 to the compression / expansion unit 622. A rotator 621 is used to rotate the image for compression. The data stored in the SAF is transferred to the line buffer 624 in the G3 control device 507, recompressed by the compression / expansion device 627 according to the mode of the receiver, and then NC via the modem 625.
Sent from U626. In the case of G4, similarly, the data is transferred to the line buffer 628 in the G4 control device 508, compressed by the compression / expansion device 631 according to the mode of the receiver, and then transmitted via the ISDN control device 629 and the transformer 630.

At the time of FAX reception / printing, the data sent from the line is sent to the SA via the NCU 626 and the modem 625.
It is stored in the F memory 623. The data stored in the SAF memory 623 is expanded by the compression / expansion device 622 on the main controller 501 and expanded on the image memory 620.

When it is more efficient to print by rotating A4 landscape or B5 landscape during decompression, the rotator 62 is used when data is transferred from the compression / decompression device 622 to the image memory 620.
Use 1 to rotate the image for stretching. The data expanded on the image memory 620 is sent to the image processing apparatus 502, passed from the selector 612 to the writing control apparatus, and printing is performed.

Whether to rotate 90 degrees horizontally on A4 side and B5 side is specified by whether one of the DIP switches SWri of the FAX control device 506 is closed or not, and the reference position is set as the final line or the first line. Switch SWpi
Is specified by whether or not is closed. 6-8, the FAX
When the image data read from the scanner and stored in the image memory 620 is transferred from the image memory 620 to the compression / expansion unit 622 at the time of image storage / transmission, and at the time of FAX reception / printing, the NC data is sent from the line.
Processing flow when the image data stored in the SAF memory 623 via the U626 and the modem 625 is expanded by the compression / expansion device 622 and the data is written in the image memory 620.
Is shown.

In this processing flow, the CPU 600 of the main controller 501 first checks whether the document size and orientation are A4 landscape or B5 landscape (step 1). In the following, the word “step” is omitted in parentheses and the step No. Write only numbers. And if it is A4 horizontal or B5 horizontal, the switches SWri, SW
Check the opening and closing of pi (2, 3). When the document size and orientation are neither A4 landscape nor B5 landscape, and when the switch SWri is open (no designation of rotation), image data transfer without rotation (620 to 622 during transmission)
To 620 when receiving (4).

If the document size and orientation are A4 landscape or B5 landscape and the switch SWri is closed (rotation designated), it is closed (the reference position is the final line) in response to opening / closing of the switch SWpi. When the switch SWpi is open (designation with the reference position as the leading line), the rotation process shown in FIG. 8 is performed. Next, these contents will be described.

[When the reference position is the final line]: FIG. 7 In this case, first, the page memory (image memory 62)
0 (or on the SAF memory 623), white data is written in an area (for 15 lines) in which image data is arranged (5). Next, 1 after the 16th line on the page memory
The image data for one page is transferred, and the number of lines of the image data for one page is counted (6). Then, it is checked whether the number of transfer lines is less than Ns (a value equivalent to 210 mm in the case of A4 landscape, 180 mm equivalent in the case of B5 landscape) (7), and if it is less (FIG. 10), the calculation of the reference position 1
(8) is executed, and if it is Ns or more (FIG. 11), reference position calculation 2 (9) is executed.

In the calculation 1 (8) of the reference position, since the image data has the distribution shown in FIG. 10, the reference position (reference address) for exchanging the image information in the main scanning direction and the sub scanning direction is expressed by the following formula. Initially set: X = (number of transfer lines) / 16 remainder Y (reference address) = (start address of write start) −
(PM main scan word number) × Y.

In the calculation 2 (9) of the reference position, since the image data has the distribution shown in FIG. 11, the reference position for exchanging the image information in the main scanning direction and the sub scanning direction is set as follows: (Reference address) = (start address of writing start) Next, with the set reference address as the origin, rectangular image data of 16 × 16 dots is extracted in both the main scanning direction and the sub-scanning direction (10), and the rectangle is extracted. The image information in the main scanning direction is exchanged with the image information in the sub scanning direction. That is, the position of the image data is rotated by 90 degrees (11). Then, the rotated image data in the rectangle is transferred (12). Image data of this rectangular area
Data extraction, rotation, and transfer in sequence, in rectangular units (16 x
All the image data of one page on the page memory are processed in the same manner (10-14). FIG.
4 shows the distribution of the rectangular area before the 90-degree rotation, and FIG. 14 shows the distribution of the rectangular area after the 90-degree rotation.

[When the reference position is the first line]: FIG. 8 First, white data is written to the entire page memory (15).
Next, one page of image data is transferred to the page memory (16). Next, the reference position at which the image information in the main scanning direction and the image information in the sub scanning direction are exchanged is set as follows (17): (reference address) = (start address of writing start) The image data is distributed as shown in FIG. And the distribution shown in FIG.

Next, using the set reference address as the origin, a rectangular image data of 16 × 16 dots is extracted in both the main scanning direction and the sub scanning direction (18), and the main scanning direction and the sub scanning in the rectangle are extracted. Swap image information in the scanning direction. That is, the position of the image data is rotated by 90 degrees (19). Then, the rotated image data in the rectangle is transferred (20). The extraction, rotation and transfer of the image data of this rectangular area are sequentially performed in units of rectangles (16.times.16 dots), and all the image data of one page on the page memory are processed in the same manner (18). ~
22).

FIG. 9 shows a rotator 6 for performing the above-mentioned rotation process.
21 shows the internal configuration of 21. FIG. 16 shows the actual state when the image data is rotated. To rotate the image in the state shown in (a) to the final shape shown in (c), (b)
Even if the image can be rotated in units of 16 × 16 bits up to the state shown in (4), it is difficult to change the arrangement. Since the image before rotation must not be destroyed, a memory area for storing the image in the state shown in (b) is required, and it takes a lot of processing time to rearrange the data. In this embodiment, the rotated image is always converted into compression coded data and stored in the SAF memory 623. The transfer order of the image data of one line at that time is shown in FIG.
It is shown in If the image data is transferred to the compression / expansion unit 622 in such an order, the arrangement conversion of the image data (conversion from (b) to (c) in FIG. 16) is simultaneously performed during the compression processing, and the above-mentioned extra The rotation compression processing can be completed in a short time without requiring a memory area or processing time.

The internal structure of the rotator 621 shown in FIG. 9 will be described. It is composed of a block (FIG. 9A) for rotating 16 × 16-bit image data and a block (FIG. 9B) for generating an address.

The operation of converting the image of FIG. 16A into that shown in FIG. 16B (rotation in units of 16 × 16 bits) is latched inside the rotator 621 in the order shown in FIG. . In the example of (a) of FIG. 16, the 16 × 16-bit image data is shown as 4 words, but actually it is composed of 16 words. The 16-word data latched inside is shifted bit by bit to generate image data after rotation processing, and the image data is transferred in the order shown in FIG.
The rotation of the x16-bit image data is completed. The address of the transfer destination image memory can be obtained by sequentially adding the number of words of the line width to the start address. If the line width is reduced, the image rotation process of 270 ° can be performed with respect to the 90 ° rotation.

The line compression operation of the image shown in FIG. 16B in the form of the image shown in FIG. 16C is performed by transferring the image to the compression / expansion unit 622 in the order shown in FIG. realizable. In the portion for generating the address in FIG. 9B, the line width is 16 with respect to the start address.
This can be done by sequentially adding the double number of words and determining the address of the image data to be transferred. Compressor / expander 6
Since 22 is an LSI that performs compression processing in units of lines, it is necessary to reset the start address when starting line compression.

Further, the image data transferred to the compression / expansion unit 622 is provided with a selector of 0 (white data) at the final stage as shown in FIG. 0 for all or set number of words
It can be replaced with (white data) and passed to the compression / expansion unit 622.

At the time of reception, the image restored by the compression / expansion device 622 is, for example, as shown in FIG. 16 (a), rotated by 90 degrees in the same manner as the above-described processing at the time of transmission, and has the shape shown in FIG. 16 (c). Is written in the image memory 620.

In the above-described embodiment, whether or not the dip switches SWri and SWpi in the FAX control device 506 are used to rotate 90 degrees both during transmission and during reception, and if so, the original image data, Although the last line reference or the first line reference is designated, it may be automatically selected according to the function of the other party. An example of this will be described below.

FIG. 17 shows a flow chart of the facsimile communication protocol. The function on the receiver side can be known from the contents of the NSF signal sent from the receiver side in the flow chart. Since image information is actually transmitted in a portion called phase C in the flow chart, it is determined from the NSF signal whether image rotation is necessary. When it is determined that rotation is necessary, it is necessary to rotationally compress the first transmission original by the time phase C starts. When the receiver side can record up to A3 width, the image data of the A4 length original is rotationally compressed. When it is determined from the contents of the NSF signal that the rotation process is not necessary (the receiver that can only record up to the A4 width), the compression of the image data is started in the A4 length state. In any case, the NSF from the receiver
By checking the signal, the rotation compression processing can be effectively used.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the outline of the mechanism of an embodiment of the present invention.

FIG. 2 is an enlarged plan view of an operation unit 400 of the digital copying machine shown in FIG.

FIG. 3 is a block diagram showing a configuration of an electric component section of the digital copying machine shown in FIG.

4 is a block diagram showing a configuration of an image processing apparatus 502 shown in FIG.

5 is a block diagram showing a flow of image data at the time of sending and receiving by facsimile in the electrical equipment section shown in FIG.

FIG. 6 shows a part of image data transfer processing between the image memory 620 and the compression / expansion unit 622, which is executed by the CPU 600 shown in FIG. 4 during facsimile transmission and reception, before and after transmission of image data. It is a flow chart.

FIG. 7 shows a part of image data transfer processing between the image memory 620 and the compression / expansion unit 622, which is executed by the CPU 600 shown in FIG. 4 during facsimile transmission and reception, before and after transmission of image data. It is a flow chart.

FIG. 8 is a flowchart showing the rest of the image data transfer processing between the image memory 620 and the compression / expansion unit 622 executed by the CPU 600 shown in FIG. 4 during facsimile transmission and reception before and after image data transmission. -It is a chart.

9 is a block diagram showing a configuration of a rotator 621 shown in FIG.

FIG. 10 is a plan view showing an outline of an image information mask when the reference position is the final line.

FIG. 11 is a plan view showing an outline of image information breakage when the reference position is the final line.

FIG. 12 is a plan view showing an outline of an image information mask when the reference position is the leading line.

FIG. 13 is a plan view showing the outline of image information breakage when the reference position is the first line.

14 is a plan view showing the distribution of rectangular regions on the image before the image rotation processing shown in FIGS. 7 and 8. FIG.

FIG. 15 is a plan view showing the distribution of rectangular areas on the image after the image rotation processing shown in FIGS. 7 and 8.

16 is a plan view showing an image before the image rotation processing shown in FIGS. 7 and 8, an image after the rotation, and an image during the rotation processing.

FIG. 17 is a diagram showing the case of sending and receiving the facsimile shown in FIG.
It is a flowchart showing the exchange of protocols between sending and receiving, and the longitudinal direction of the paper is the time axis.

Claims (6)

[Claims] 1. A facsimile apparatus having a function of reading an original with a scanner, storing image information of the read original in an image information storage memory, and then exchanging image information in the main scanning direction and image information in the sub scanning direction. When the start position is set to a position corresponding to the beginning position of the last line of the document in the sub-scanning direction, and the amount of image information in the sub-scanning direction exceeds the length of the document in the sub-scanning direction, the image information loss is detected in the sub-scanning direction of the document. A facsimile apparatus characterized in that the image information mask is located on the trailing edge side and the image information mask is located on the leading edge side in the sub-scanning direction of the document when the amount of image information in the sub-scanning direction is not sufficient for the length of the document in the sub-scanning direction. 2. A facsimile apparatus having a function of reading an original with a scanner, storing the image information of the read original in an image information storage memory, and then exchanging the image information in the main scanning direction and the sub scanning direction. A facsimile machine characterized in that the start position is at the beginning of the leading line and the image information break and the image information mask are at the trailing end side of the document in the sub-scanning direction. 3. A facsimile apparatus having a function of reading an original with a scanner, storing image information of the read original in an image information storage memory, and then exchanging image information in the main scanning direction and image information in the sub scanning direction. A facsimile apparatus comprising means for selecting whether to set a start position to a position corresponding to the start position of the last line of the original in the sub-scanning direction or the start position of the start line. 4. A facsimile device having means for compressing and coding image data, wherein the image data is compressed and coded as it is, or m × n bit units, m and n are numbers of 2 or more, respectively. A facsimile apparatus comprising: means for selecting whether to perform compression encoding after performing the rotation processing in 1. 5. When transmitting an A4 length original, if the receiver side can record up to A3 width, rotation compression is performed, and if only A4 length width recording is possible, normal data compression is performed without rotation. The facsimile apparatus according to claim 4, further comprising: 6. The selecting means includes a selection switch,
The facsimile apparatus according to claim 4.