JP3597623B2 - Facsimile machine - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a facsimile apparatus having a page memory for storing image information of a read original.
[0002]
[Prior art]
For example, in the case where an A4 original is read and transmitted by a scanner so as to have a main scanning direction of 297 mm and a sub-scanning direction of 210 mm, the original is transmitted with a main scanning A3 width. At this time, if the capability of the other receiver is only up to B4, it is reduced. In order to prevent such a situation, the operator sets an original on an ADF (automatic original feeder) so that the original becomes 210 mm in the main scanning direction and 297 mm in the sub scanning direction, and the ADF is provided with guidance. However, if the operator sets the document in the wrong direction, the document must be reduced. In order to avoid this, even if the A4 original is set to 297 mm in the main scanning direction and 210 mm in the sub-scanning direction, the image data in the main scanning direction and the sub-scanning direction are exchanged at the time of accumulation, so that the image is transmitted in the main scanning A4 width. I have. As a method of rotating image data, a method of using a two-dimensional memory that rotates in units of 16 × 16 bits is generally used.
[0003]
However, in order to rotate large image data, it is necessary to relocate an image rotated in units of 16 × 16 bits, and this operation requires a lot of time.
[0004]
[Problems to be solved by the invention]
An A4 original is set in an original feeder (ADF) having a linear conveyance path so as to be 297 mm in the main scanning direction and 210 mm in the sub-scanning direction, and then fed, and when read by a scanner, is actually transferred to a memory. Image information is affected by the feeding accuracy of the ADF, and the image information in the sub-scanning direction is not exactly 210 mm worth of image information, resulting in excess or deficiency. Even when the operator places a document under the pressure plate, the movement accuracy of the scanner is affected. When the image information in the sub-scanning direction has exceeded, the image information at the front end or the rear end in the sub-scanning direction may be cut and the image information in the main scanning direction and the sub-scanning direction may be replaced. If the image information in the sub-scanning direction is insufficient, it is necessary to add dummy image information to the leading or trailing end in the sub-scanning direction.
[0005]
The first object of the present invention is to reduce the rotation processing time, and since the paper size on the receiver side does not match the feed direction on the transmission side, an A4 landscape document is reduced and output on A4 length paper. The second object is to improve the inconvenience such as that the A4 portrait document is divided and output on two A4 landscape papers, and the third purpose is to release the limitation of the original setting posture. A fourth object is to reduce the total processing time of image data rotation and compression encoding, and a fifth object is to eliminate unnecessary rotation processing.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a facsimile apparatus having a function of reading a document with a scanner, storing image information of the read document in an image information storage memory, and exchanging image information in a main scanning direction and a sub-scanning direction.
After at least several lines of the area where the image information of the image information storage memory is arranged as white mask information,Image informationWritten, writtenThe image information amount in the sub-scanning direction issizeLength in the sub-scanning directionIn the above case, the information of the area is divided into blocks in m × n dot units and m and n are each 2 or more, with the top line of the image information of the area as the origin (FIG. 11). The rotation processing of each block of the size of the document from the origin is performed, and writing is performed.The image information amount in the sub-scanning direction issizeIs too short in the sub-scanning directionAt this time, the line of the area short before the leading line of the image information of the area is set as the origin, and then the area information is divided into blocks of m × n dots (FIG. 10). Control means (600) for performing rotation processing of each block;
HaveIt is characterized by the following.
[0007]
According to this, when exchanging the image information in the main scanning direction and the sub-scanning direction, when the top of the last line of the document is used as a reference, the image at the top of the document is not cut off, and the white image is stored in the entire page memory. Since there is no need to write data, the time required for the replacement process can be shortened.
[0008]
According to a second aspect of the present invention, there is provided a facsimile apparatus having a function of reading a document with a scanner, storing image information of the read document in an image information storage memory, and exchanging image information in a main scanning direction and a sub scanning direction.
After the entire area of the image information storage memory in which the image information is arranged is set as white mask information, the area from the beginning of the area isImage informationWriting, starting from the top line of the image information in the area as the origin, the area information is divided into blocks in units of m × n dots (FIGS. 12 and 13), and rotation processing of each block of the size of the document from the origin is performed. Controlling means (600),
HaveIt is characterized by the following. According to this, the image at the leading end of the document does not need to be cut.
[0009]
According to a third aspect of the present invention, there is provided a facsimile apparatus having a function of reading a document with a scanner, storing image information of the read document in an image information storage memory, and exchanging image information in a main scanning direction and a sub scanning direction.
Means for selecting whether to set the rotation start position of the image at a position corresponding to the head position of the last line in the sub-scanning direction of the document or at the head of the head line;and,
In the case where the selection unit sets the rotation start position of the image to correspond to the head position of the last line in the sub-scanning direction of the document, at least several lines of the area where the image information of the image information storage memory From the white mask information, the image information is written after the white mask information for the several lines in the area, and when the written image information amount in the sub-scanning direction is equal to or more than the length of the document size in the sub-scanning direction, Starting from the top line of the image information of the area as the origin, the area information is divided into blocks in units of m × n dots (FIG. 11). If the amount of image information in the scanning direction is less than the length of the document size in the sub-scanning direction, a line short of the leading line of the image information in the area is defined as the origin, and from there the mxn dot unit is used. The rear information is divided into blocks (FIG. 10), and rotation processing of each block of the size of the document from the origin is performed.
The selecting means,The rotation start position of the image is set at the beginning of the first line in theIn this case, the entire area in which the image information of the image information storage memory is arranged is set as white mask information, and then the area from the beginning of the area is set as the white mask information.Image informationWriting, starting from the top line of the image information in the area as the origin, the area information is divided into blocks in units of m × n dots (FIGS. 12 and 13), and rotation processing of each block of the size of the document from the origin is performed. Controlling means (600);
Is provided. According to this, usability is improved.
[0010]
According to a fourth aspect of the present invention, there is provided means for compressing and encoding image data, and image data as it is.PressureCompression coding, orOf the blockRotationPost-treatment pressureMeans for selecting whether to perform compression coding.FurtherPreparation;The control means, when the selection means selects the post-rotation compression encoding, the compression-encoded means compresses and codes the rotated information;It is characterized by.
[0011]
According to this, following the rotation processing of the image data, the original data input in the A4 landscape direction at the time of transmission to the memory of the facsimile apparatus is converted into the coded data in the A4 length form by performing the encoding processing by the compression processing. And you can make a choice. An A4 landscape document is not reduced and output on A4 length paper, or an A4 portrait document is not split and output on two A4 landscape papers.
[0012]
Fifth aspect of the present inventionThe control means ofWhen transmitting A4 length originals, if the receiver can record up to A3 width,SaidrotationProcessing andcompressionCodingIf you can only record up to A4 length,SaidrotationprocessingWithout doingCompression encoding by compression encoding means. According to this, the function of the receiver is checked, and then the presence / absence of rotation compression is determined, so that unnecessary rotation processing is not required.
[0013]
Sixth aspect of the present inventionWhether to perform compression encoding after rotation processing of the blockThe selection means is a selection switch(SWri)Was included. According to this, since the user can select whether or not to apply the rotation compression, it is possible to read all the A4 size and transmission originals in the A4 landscape direction in the same sense as when making a copy. It is not necessary to change the direction of the original set.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
【Example】
FIG. 1 shows an outline of a mechanism section according to an embodiment of the present invention. This mechanism is that of 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.
[0015]
The copier main body 1 includes a scanner, an image processing unit, a plotter, and the like. The scanner includes a contact glass 10 on which a document is placed and an optical scanning system. The optical scanning system includes an exposure lamp 11, a first It comprises a mirror 12, a lens 15, a full color CCD 16, and the like. The first carriage equipped with the exposure lamp 11 and the first mirror 12 is driven by a stepping motor and moves at a constant speed when reading a document. The second carriage equipped with the second mirror 13 and the third mirror 14 is driven by a stepping motor at the time of reading a document, and moves at half the speed of the first carriage.
[0016]
An original (not shown) on the contact glass 10 is optically scanned by the first carriage and the second carriage, and is scanned on the CCD 16 via the light source 11, the first mirror 12, the second mirror 13, the third mirror 14, and the lens 15. An image is formed and photoelectrically converted. The image signal separated into each color of red (R), green (G), and blue (B) by the CCD 16 is converted into digital data (color image data) by an AD converter and subjected to image processing. Output to the The image processing section performs various image processing (binarization processing, halftone processing, scaling processing, editing processing, color conversion processing, etc.) on the color image data and converts it into color recording data.
[0017]
The writing unit includes a laser output unit 20, an fθ lens 21, and a mirror 22. Inside the laser output unit 20, a laser diode as a laser light source and a polygon motor are provided. The black recording data output from the image processing unit is converted into laser light having an intensity corresponding to the data, shaped into a light beam of a predetermined shape by a collimator lens, an aperture, and a cylinder lens, and irradiated to a polygon motor. Are output from the laser output unit 20. The laser beam output from the laser output unit 20 is applied to the photosensitive drum 30 via the fθ lens 21 and the mirror 22. Further, the laser light that has passed through the fθ lens 21 is applied to a beam sensor that is arranged outside the image area and generates a main scanning synchronization detection signal PMSYNC.
[0018]
The red recording data output from the image processing unit is buffered to match the writing position with the black recording data, sent to the LED writing unit 31, and irradiated on the photosensitive drum 30.
[0019]
The ADF 100 feeds the documents one by one to the contact glass 10 of the copying machine main body 1 and discharges them after copying. Documents are stacked on a document feed table 101 and are aligned in the width direction by side guides. The document on the document feeder 101 is separated and fed one by one from a lowermost document by a feed roller 102, and is fed onto a contact glass 10 of the copying machine main body 1 by a transport belt 103. After the reading of the original on the contact glass 10 is completed, the original is discharged to a discharge tray 105 by a transport belt 103 and a discharge roller 104.
[0020]
When reading a two-sided document, the two-sided document on the document feed table 101 is separated and fed one by one from a lowermost document by a feed roller 102, and the contact of the copying machine main body 1 is conveyed by a transport belt 103. The document is sent onto the glass 10 and is set on the contact glass 10 after the document is inverted by the inversion claw 106. After reading the back side of the original, the original is conveyed by the conveyor belt 103 and set on the contact glass 10 after the original is inverted by the inversion claw 106. After the reading of the front side of the document, the document is discharged to a discharge tray 105 by a transport belt 103 and a discharge roller 104.
[0021]
The transfer papers stacked on the first tray 50, the second tray 310, the third tray 320, and the fourth tray 330 are transferred to the first paper feeder 51, the second paper feeder 311 and the third paper feeder 321, respectively. Paper is fed by the fourth paper feeder 331 and is transported by the bank vertical transport unit 340 and the main body vertical transport unit 60. When the leading edge of the transfer paper is detected by the registration sensor 52, the transfer paper is conveyed for a predetermined time and then stopped by the registration roller 53.
[0022]
The transfer paper is sent out onto the photosensitive drum 30 in accordance with the leading edge of an image valid signal (FGATE), an image is transferred by a transfer charger, the transfer paper is separated from the photosensitive body, and then transported by the transport device 54 to be fixed. The sheet is fixed by a fixing device 55 having a roller and a pressure roller, and is discharged to a three-bin sorter 200 by a discharge roller 56.
[0023]
In the black image formation, an electrostatic latent image is formed by irradiating a laser beam onto the photosensitive drum 30 charged by the first charging device, and the electrostatic latent image is developed by the black developing device 32. Thereafter, the photosensitive drum 30 is charged again by the second charging device, a 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.
[0024]
When performing duplex printing using the duplex unit 40, the fixing unit 55EmissionThe transferred paper is guided to the two-sided conveyance path 41 by the switching claw 57, passes through the feed roller 42 and the separation roller 43, and is accumulated on the two-sided tray. The transfer paper accumulated on the tray comes into contact with the feed roller 42 when the tray is raised, is sent to the main body vertical conveyance unit 60 when the feed roller 42 rotates, and is re-fed to the registration roller 53 before being fed back. Is printed.
[0025]
The three-bin sorter 200 includes a first paper discharge tray 201, a second paper discharge tray 202, a third paper discharge tray 203, and a tray for reversing 204, and transfer paper can be reversed and output to each tray.
[0026]
In the case of front-side discharge, the transfer sheet discharged from the copying machine main body 1 is guided by the switching claw 207 in the direction of the discharge tray, and discharged to a preset tray. The second tray switching claw 205 operates when discharging to the second discharge tray 202, and the third tray switching claw 206 operates when discharging to the third tray switching claw 203 to guide the transfer paper. .
[0027]
In the case of reversing discharge, the switching claw 207 guides the transfer paper toward the reversing tray 204, and when the rear end of the transfer paper passes the reversing detection sensor 208, the transport roller 209 reverses and is guided toward the discharge tray. Paper is discharged to the set tray.
[0028]
Further, a mechanism for shifting the tray back and forth and a mechanism for shifting the tray up and down are mounted on the first discharge tray 201. The front-rear shift mechanism is used for sorting transfer papers, and the up-down mechanism is used for stacking a large amount of transfer papers while ensuring sheet alignment.
[0029]
FIG. 2 shows the operation unit 400 of the above-described digital copying machine. At the center of the operation unit, a liquid crystal display unit (LCD) 401 of 400 × 256 dots and a touch panel are provided. The liquid crystal display unit 401 displays the functions (copy, FAX) incorporated in the machine, and the user operates the machine according to the display. Switching of functions (copy / fax) is performed by function switching keys 412 and 413.
[0030]
On the right side of the liquid crystal display unit, various numeric keys 402, a clear / stop key 403, a start key 404, a program key 405, a job recall key 406, a mode clear / preheat key 407, and an interrupt key 408 commonly used for copy / fax. And keys such as a pause / redial key 409, abbreviated key 410, and a reception key 411 used exclusively for FAX.
[0031]
On the left side of the liquid crystal unit, there are provided a FAX switching key 412, a copy switching key 413, an initial setting key 414, a guidance key 415, and an LCD density adjustment volume 416.
[0032]
A display unit 417 dedicated to FAX is provided at a further left portion of these keys. The display unit is provided with various LEDs for displaying information such as “communication, memory full” and the like, and an LCD of 40 characters (20 characters × 2 lines) for displaying a communication state.
[0033]
FIG. 3 shows the configuration of the electrical unit of the above-described digital copying machine. The control of the copier main body 1 includes a liquid crystal display of the operation unit 400, an operation unit controller 500 for performing various LED controls, and various key input controls, a main control unit 501 for performing paper supply, conveyance, fixing, double-sided, process control, and the like, and a scanner. It performs protocol control of an image processing device 502 for performing reading control and image processing control, an ADF control device 503, a sorter control device 504, a paper feed tray control device 505, a FAX control device 506 for performing FAX transmission / reception management, and file management, and G3. It is composed of a G3 control device 507, a G4 control device 508 that performs G4 protocol control, and the like.
[0034]
FIG. 4 shows the configuration of the image processing device 502. MaineControl deviceCPU 600 of 501 (FIG. 3)ReadWhen there is an instruction to start sampling, the instruction is transmitted to the scanner control circuit 604. The scanner control circuit 604 turns on the exposure lamp 11, moves the first carriage and the second carriage to the reading reference position by operating the motor 605, and starts reading after the position sensor 603 detects that the reference position has been reached. At this time, a sub-scanning effective 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 an image synchronization clock CLK, a main scanning synchronization signal LSYNC, and a main scanning enable signal LGATE.
[0035]
An original image 607 placed on the contact glass 10 is illuminated by the light source 11, the reflected light is imaged on the color CCD 16, and the analog image separated from the color CCD 16 into red (R), green (G), and blue (B). The signal is amplified / light quantity corrected by a signal processing circuit 608, converted into a digital multi-value signal (color image data) by an AD converter 609, subjected to shading correction by a shading correction circuit 610, and sent to an image processing section 611.
[0036]
The image processing unit 611 performs basic image quality processing such as MTF correction, γ correction, black image generation, binarization processing, halftone processing, and digital-specific image processing such as scaling, editing, and marker detection. It outputs black data DATA0-7 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 input to the image selector 612.
[0037]
In the case of copy (copy), the black image is sent from the writing control unit (black) 613 to the LD 614, and the color image is sent from the writing control unit (color) 615 to the LED 616, and is irradiated on the photoconductor drum. To form
[0038]
When performing FAX transmission, the data is transferred from the selector 612 to a FAX memory inside the main control device 501. The FAX reception output is obtained by expanding the data received from the line and expanding the data in the FAX memory, and then inputting the expanded data to the image selector 612 together with the image data and the synchronizing signal.
[0039]
FIG. 5 shows the flow of image data at the time of fax transmission and reception. At the time of FAX image storage / transmission, the image data read from the scanner is subjected to various image processing by the image processing device 502, and then stored in the image memory 620 of the main control device 501 from the selector 612. Thereafter, the data is compressed into a specified compression code (MH, MR, MMR) by the compression / expansion device 622 and stored in the SAF memory 623 on the FAX control device 506.
[0040]
At this time, if it is more efficient to transmit the data stored in the image memory 620 by rotating the data, such as A4 width or B5 width, if the data is transferred from the image memory 620 to the compression / expansion unit 622, the rotation 621 is used to rotate and compress the image. The data stored in the SAF is transferred to the line buffer 624 in the G3 control device 507, recompressed by the compression / decompression device 627 according to the mode of the receiver, and transmitted from the NCU 626 via the modem 625. Similarly, in the case of G4, the data is transferred to the line buffer 628 in the G4 control device 508, compressed by the compression / decompression device 631 according to the mode of the receiver, and then transmitted via the ISDN control device 629 and the transformer 630.
[0041]
At the time of FAX reception / printing, data sent from the line is stored in the SAF memory 623 via the NCU 626 and the modem 625. The data stored in the SAF memory 623 is decompressed by the compression / decompression device 622 on the main control device 501 and is expanded on the image memory 620.
[0042]
If it is more efficient to rotate and print A4 landscape or B5 landscape at the time of decompression, rotate the image by using the rotator 621 when passing data from the compression / decompression unit 622 to the image memory 620 to perform decompression. Do. The data developed on the image memory 620 is sent to the image processing device 502, passed from the selector 612 to the writing control device, and printed.
[0043]
Whether to rotate 90 degrees to the sides of A4 and B5 is specified by whether or not one of the dip switches SWri of the FAX controller 506 is closed, and whether the reference position is the last line or the first line is determined. Is specified by whether the switch SWpi is closed or not.
[0044]
FIG. 6 to FIG. 8 show a case where 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 during FAX image storage / transmission, and FAX reception / printing. A processing flow when the image data sent from the line and stored in the SAF memory 623 via the NCU 626 and the modem 625 is expanded by the compression / expansion unit 622 and the data is written in the image memory 620 is shown.
[0045]
In this processing flow, the CPU 600 of the main control device 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 step No. Write only numbers. If it is A4 side or B5 side, the open / close of the switches SWri and SWpi is checked (2, 3). When the document size and orientation are neither A4 landscape nor B5 landscape, and when the switch SWri is open (rotation is not specified), image data transfer without rotation (from 620 to 622 for transmission, and 622 to 620) (4).
[0046]
If the document size and orientation are A4 landscape or B5 landscape and the switch SWri is closed (rotation designation), it is closed (designation of the reference position as the last line) in response to opening and closing of the switch SWpi. At times, the rotation processing shown in FIG. 7 is executed, and when the switch SWpi is open (the reference position is designated as the first line), the rotation processing shown in FIG. 8 is executed. Next, these contents will be described.
[0047]
[Set the reference position as the last lineSpecifiedCase): FIG.
In this case, first, white data is written in an area (for 15 lines) of the page memory (on the image memory 620 or the SAF memory 623) where the image data is arranged (5). Next, the image data for one page is transferred to the 16th line and subsequent lines on the page memory, 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 (equivalent to 210 mm in the case of A4 width, equivalent to 180 mm in the case of B5 width) (7). 8) is executed, and if it is Ns or more (FIG. 11), the reference position calculation 2 (9) is executed.
[0048]
In the calculation of the reference position 1 (8), since the image data has the distribution shown in FIG. 10, the image information in the main scanning direction and the sub-scanning direction are exchanged.GroupAssociate addressTheIt is set using the following formula:
X = (number of transfer lines) / 16 remainder Y
(Reference address) = (Start address of writing start) − (Number of PM main scanning words) × Y
In the calculation of the reference position 2 (9), 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) = (write start address)
Next, rectangular image data of 16 × 16 dots is extracted in both the main scanning direction and the sub-scanning direction with the set reference address as the origin (10). Replace image information. That is, the position of the image data is rotated by 90 degrees (11). Then, the rotated image data within the rectangle is transferred (12). The extraction, rotation, and transfer of the image data in the rectangular area are sequentially performed in a rectangular unit (16 × 16 dots), and all the image data of one page on the page memory is processed in the same manner (10). ~ 14). FIG. 14 shows the distribution of the rectangular area before the 90-degree rotation,FIG.9 shows the distribution of the rectangular area after the above-described 90-degree rotation.
[0049]
[Set the reference position to the first lineSpecifiedCase]: FIG.
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, a reference position for exchanging image information in the main scanning direction and the sub-scanning direction is set as follows (17):
(Reference address) = (write start address)
The image data has a distribution shown in FIG. 12 and a distribution shown in FIG.
[0050]
Next, with reference to the set reference address as the origin, rectangular image data of 16 × 16 dots in both the main scanning direction and the sub-scanning direction are extracted (18). Replace image information. That is, the position of the image data is rotated by 90 degrees (19). Then, the rotated image data within the rectangle is transferred (20). The extraction, rotation, and transfer of the image data in the rectangular area are sequentially performed in a rectangular unit (16 × 16 dots), and all the image data of one page on the page memory is processed in the same manner (18). ~ 22).
[0051]
FIG. 9 shows an internal configuration of a rotator 621 that performs the above-described rotation processing. FIG. 16 shows actual rotation of the image data. The image in the state shown in FIG. 16A is rotated to the final shape shown in FIG. Even if rotation can be performed in 16-bit units, it is difficult to perform arrangement conversion. 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 much processing time is required to relocate the data. In the present embodiment, the image after rotation is always converted into compression encoded data and stored in the SAF memory 623. The transfer order of one line of image data at that time is shown in FIG. If the image data is transferred to the compression / expansion unit 622 in such an order, the image data arrangement conversion (conversion from (b) to (c) in FIG. 16) is performed at the same time during the compression processing. The rotation compression process can be completed in a short time without requiring a memory area or processing time.
[0052]
The internal configuration of the rotator 621 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.
[0053]
The operation of converting the image shown in FIG. 16A into the image shown in FIG. 16B (rotation in units of 16 × 16 bits) is latched into the rotator 621 in the order shown in FIG. In the example of FIG. 16A, the image data of 16 × 16 bits is shown as 4 words, but is actually composed of 16 words. The 16-word data latched inside is shifted one bit at a time to generate rotated image data, which are transferred to the image memory in the order shown in FIG. The rotation of the image data is completed. The transfer destination image memory address is the start address.ToOn the other hand, it can be obtained by sequentially adding the number of words of the line width. Here, if the line width is reduced, image rotation processing of 270 ° can be performed for 90 ° rotation.
[0054]
The operation of line-compressing the image of FIG. 16B in the form of the image shown in FIG. 16C can be realized by transferring the image to the compression / decompression unit 622 in the order shown in FIG. In the part for generating the address shown in FIG. 9B, the address of the image data to be transferred can be determined by sequentially adding the word number 16 times the line width to the start address. Since the compression / expansion unit 622 is an LSI that performs compression processing in units of lines, it is necessary to reset the start address when starting line compression.
[0055]
The image data to be transferred to the compression / expansion unit 622 is provided with a selector of 0 (white data) at the final stage as shown in FIG. The set number of words can be replaced with 0 (white data) and sent to the compression / expansion unit 622.
[0056]
At the time of reception, the image restored by the compression / expansion unit 622 is rotated by 90 degrees, for example, as shown in FIG. Is written to the memory 620.
[0057]
In the above-described embodiment, the dip switches SWri and SWpi in the facsimile control unit 506 determine whether or not the rotation is performed by 90 degrees at the time of transmission and reception, and if so, the last line of the original image data. Although it is specified whether to use the reference or the top line reference, this may be automatically selected according to the function of the destination. This example will be described below.
[0058]
FIG. 17 shows a flowchart of a facsimile communication protocol. The function on the receiver side can be known from the contents of the NSF signal sent from the reception side in the flowchart. Since the image information is actually transmitted in a portion called phase C in the flow chart, it is determined whether or not image rotation is necessary based on the NSF signal. If it is determined that rotation is necessary, the first transmitted document needs to be rotationally compressed before the start of phase C. If the receiver can record up to the A3 width, the image data of the A4 length document is rotationally compressed. If it is determined from the contents of the NSF signal that rotation processing is not necessary (a receiver that can only record up to the A4 length), image data compression is started in the A4 length state. In any case, the rotation compression processing can be effectively used by checking the NSF signal from the receiver.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a mechanism outline 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 electrical unit of the digital copying machine shown in FIG.
FIG. 4 is a block diagram illustrating a configuration of the image processing apparatus 502 illustrated in FIG.
FIG. 5 is a block diagram showing a flow of image data at the time of facsimile transmission and reception in the electrical unit shown in FIG. 2;
6 shows a part of image data transfer processing between the image memory 620 and the compression / expansion unit 622 executed by the CPU 600 shown in FIG. 4 before and after image data transmission during facsimile transmission and reception. This is a flowchart.
7 shows a part of image data transfer processing between the image memory 620 / compressor / expander 622 executed by the CPU 600 shown in FIG. 4 before and after image data transmission during facsimile transmission and reception. This is a flowchart.
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 before and after transmission of image data during facsimile transmission and reception. -Chart.
FIG. 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 a reference position is a last line.
FIG. 11 is a plan view showing an outline of image information breakage when the reference position is the last line.
FIG. 12 is a plan view illustrating an outline of an image information mask when a reference position is set to a first line.
FIG. 13 is a plan view showing an outline of image information breakage when a reference position is set as a first line.
FIG. 14 is a plan view showing a distribution of rectangular regions on an image before the image rotation processing shown in FIGS. 7 and 8;
FIG. 15 is a plan view showing the distribution of rectangular regions on an image after the image rotation processing shown in FIGS. 7 and 8;
FIG. 16 is a plan view showing an image before the image rotation processing, an image after rotation, and an image in the middle of rotation processing shown in FIGS. 7 and 8;
17 is a flowchart showing the exchange of a protocol between sending and receiving at the time of facsimile sending and receiving shown in FIG. 5, and the longitudinal direction of the paper is the time axis.

Claims (6)

In a facsimile machine having a function of reading an original with a scanner and 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,
Of the area to place the image information of the image information storing memory, at least several lines from the white mask information, writes the image information to the white mask after information of said number line of the area, a sub-scanning direction is written When the image information amount is equal to or larger than the length of the document size in the sub-scanning direction, the starting line of the image information in the area is set as the origin, and from there, m × n dot units, and m and n are numbers of 2 or more, respectively. When the information of the area is divided into blocks and the rotation process of each block of the document size from the origin is performed, and the written image information amount in the sub-scanning direction is less than the length of the document size in the sub-scanning direction, The line of the area short before the leading line of the image information of the area is defined as the origin, and then the area information is divided into blocks of m × n dots, and the rotation processing of each block of the size of the document from the origin is performed. Performing control means,
Facsimile apparatus comprising: a. In a facsimile machine having a function of reading an original with a scanner and 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,
After the entire area of the image information storage memory in which the image information is arranged is set as white mask information, the image information is written from the beginning of the area. control means for dividing the information of the area into blocks in units of n dots and performing a rotation process for each block of the size of the document from the origin;
Facsimile apparatus comprising: a. In a facsimile machine having a function of reading an original with a scanner and 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,
Means for selecting whether to set the rotation start position of the image at a position corresponding to the head position of the last line in the sub-scanning direction of the document or at the head of the head line ;
In the case where the selection unit sets the rotation start position of the image to correspond to the start position of the last line in the sub-scanning direction of the document, at least several lines of the area where the image information is arranged in the image information storage memory are set. From the white mask information, the image information is written after the white mask information for the several lines in the area, and when the written image information amount in the sub-scanning direction is equal to or more than the length of the document size in the sub-scanning direction, With the top line of the image information of the area as the origin, the area information is divided into blocks in units of m × n dots, and each block of document size is rotated from the origin, and the written sub-scan is performed. When the amount of image information in the direction is insufficient for the length of the document size in the sub-scanning direction, the origin is set to a line short of the head line of the image information in the area by an amount of m × n dots. Rear information is divided into blocks, and rotation processing of each block of the size of the document from the origin is performed,
When the selection unit sets the rotation start position of the image to the head of the head line in the sub-scanning direction of the document , the entire area in which the image information of the image information storage memory is arranged is set as white mask information, The image information is written from the start end of the area, and the information of the area is divided into blocks of m × n dots starting from the head line of the image information of the area. Control means for performing processing;
A facsimile machine comprising: Means for compressing and encoding the image data, and, means for selecting whether the or or or compression encoding, or rotated processed after compression encoding of the block image data, further comprising a; said control means 4. The information processing apparatus according to claim 1 , wherein, when the selection unit selects the compression encoding after the rotation process, the information subjected to the rotation process is compression-encoded by the compression encoding unit. A facsimile apparatus according to any one of the preceding claims. Wherein, when transmitting the A4 vertical document, if the receiver can record up to A3 width, it performs the rotation processing and compression coding, if you can not only record up to A4 vertical width, without the rotation processing 5. The facsimile apparatus according to claim 4, wherein the compression encoding is performed by a compression encoding unit. 5. The facsimile apparatus according to claim 4 , wherein the means for selecting whether to perform compression coding after the rotation processing of the block includes a selection switch.

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