JP2537192B2 - Image playback device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image reproducing apparatus for reproducing an original image on a recording material.

[Prior art]

In conventional copiers, there is a limit to the paper size that can be used (usually up to A3 size), so it was possible to obtain only part of the original as an output when performing enlarged copy. Further, in order to combine the copy outputs to make a copy larger than the maximum paper size, it is necessary for the operator to change the placement direction and position of the document for each copy. Also in that case, the overlapping width between the copies and the output order were indefinite, and considerable labor was required.

(Purpose) It is an object of the present invention to improve the operability of an image reproducing apparatus that enlarges a document image to a reproduction image size larger than that of a recording sheet, divides the enlarged document image, and reproduces the image on each of a plurality of recording sheets. , To be more specific, the operator sets the reproduction image size of the signature without the operator setting the enlargement ratio or the recording paper size, so that the appropriate enlargement ratio can be calculated and the appropriate recording paper size can be selected. The object is to provide an image reproducing device to be made.

〔Example〕

 Hereinafter, the present invention will be described based on preferred embodiments.

FIG. 1-1 shows the appearance of a copying machine to which the present invention is applied. This apparatus is composed of two units, a reader A for reading an original image and a printer B for reproducing the image on a recording material. The reader A has an operation unit A-1. 1st-
FIG. 2 shows a structural sectional view of the reader A and the printer B. The original is placed face down on the platen glass 3 and is pressed onto the glass by the original cover 4. The original is illuminated by the fluorescent lamp 2 and its reflected light is condensed on the surface of the CCD 1 via the mirrors 5 and 7 and the lens 6.

The mirror 7 and the mirror 5 move at a relative speed of 2: 1. These optical systems reciprocate at a constant speed while applying a PLL by the DC servo motor 26. Same time forward (from left to right)
Is 180 mm / sec, and the return path (from right to left) is 800 mm / sec regardless of the magnification. Maximum document size that can be processed is A3
Since the resolution is 400 dots / inch, the number of bits for CCD1 is You need a bit. Therefore, the leader A has 5000 bits.
CCD is used. The main scanning cycle is Is. The original image is line-scanned by the CCD 1 to obtain an image signal indicating image density.

The image signal processed bit-serially by the reader A is input to the laser scanning optical system unit 25 of the printer B.
The unit 25 is composed of a semiconductor laser collimator lens, a rotating polyhedron mirror, an FQ lens, and a tilt correction optical system.

The image signal from the reader A is applied to a semiconductor laser to be converted into electric light, and is irradiated onto a polyhedron mirror that rotates at a high speed through a collimator lens, and the reflected light is incident on the photoconductor 8 and scanned. As a process component that enables image formation on the photoconductor 8, a pre-electrifier 9, a pre-electrification lamp 1
0, primary charger 11, secondary charger 12, whole surface exposure lamp 13,
Developing device 14, paper feed set 15, paper feed roller 16, paper feed guide 1
7, registration roller 18, transfer charger 19, separation roller 20,
A transport guide 21, a fixing device 22, and a tray 23 are arranged.
The speed of the photoconductor 8 and the transport system is 180 mm / sec. The printer B is a so-called laser printer.

The copying machine of this example has intelligence such as image editing, and its function is variable magnification of 0.35 → 4.0 times in 1% increments, trimming or image trimming to extract only the specified area from the paper. It has a moving function of moving to an arbitrary position above, a position coordinate detecting function of a document placed on the document table 3, and the like. Details of each function will be described later.

FIG. 2 shows the details of the operation unit A-1, which will be described below.

100 is a copy start key, 102 is a copy stop key, 101 is a key for returning the copy mode to the standard state, 1
Reference numeral 03 is a ten-key group from 0 to 9, a C key for clearing the number of sheets and the like, and an X key used for inputting numerical data such as a trimming area. Reference numeral 108 is a key for updating the density and displaying the density on the display unit 112. A key 104 and a display unit 105 are keys and display for turning on and off the document position coordinate detection function, 111 is a copy number display unit, 113 is various error display units, and key 109 and display unit 11
4 is a key and display section for turning on and off the automatic density adjustment function,
A key 110 and a display unit 115 are keys and a display unit for turning on and off a dither processing function for a photo original, and a key 116 is a key for selecting a paper feed tray and an automatic paper selection function.
The paper size is displayed on. Key 120 is a key to increase / decrease the magnification in 1% steps, and 119 is a magnification display section. 120
Is a key to select whether auto scaling is the same size, and the result is 12
Displayed in 1. The operation display unit 122 is a preset key display unit for presetting and calling the copy mode. 12
Reference numeral 3 denotes a liquid crystal display section constituted by 32 columns of 5 × 7 dot matrix, and a key group 124 is a soft key for selecting a desired mode from the copy modes displayed on the display section 123.

 FIG. 3 shows a system block diagram of the reader B.

The CCD reading unit 301 includes a CCD, a CCD clock driver, a signal amplifier from the CCD, and an A / D for converting the signal into an analog / digital signal.
Built-in converter etc. 6 from CCD reading unit 301
The image data converted into a bit (64 gradations) digital signal is output and input to the shading correction unit 302.

In the shading correction unit 302, after detecting and correcting the shading amount of the light source, the lens, etc., the image signal is temporarily stored in the shift memory unit 303. The shift memory unit 303 has two lines of shift memory,
When the image data of the Nth line is being written in the first memory, the image data of the (N-1) th line is read from the second memory. In addition to this, the shift memory unit 303 has a write address counter for writing image data in the shift memory, a read address counter for reading image data, and an address selector circuit for switching address signals from these two counters. . Details are shown in FIG.

Further, the scaling / movement processing unit 304 performs scaling or movement in the main scanning direction by changing the clock for writing the image signal in the shift memory unit 303, the clock for reading from the shift memory unit 303, and the timing for reading. The details of these will be described later.

The image signal output from the shift memory unit 303 is input to the density processing unit 305, where the image signal is binarized and dithered to be a binary signal, which is output to the trimming processing unit 306. The trimming processing unit 306 forcibly processes any section of the main scanning line image data into "0" or "1" to enable image editing. Details will be described later. The binary signal output from the density processing unit 305 is also input to the document position detection unit 307. Here, the position coordinates of the original document on the original platen glass 3 are detected using a binary signal by means described later.

The CPU unit 308 is composed of a well-known microcomputer including a CPU, ROM, RAM, a timer circuit, and an I / O interface. The CPU unit 308 controls the operation unit 507, controls the reader A according to the setting made by the operator, and controls the printer B by serial communication. 311 is a DC servo motor driver, and the CPU presets speed data according to the magnification. 312 is a fluorescent light driver, O of fluorescent light 2
N / OFF and control the light amount at the time of lighting. Reference numerals 313 and 314 are position sensors for the CPU 308 to know the position of the optical system.

The printer B is connected to the printer B via the connector JRI of the printer B. Control signals necessary for image data communication and serial communication are exchanged between the reader A and the printer B. Details will be described with reference to Figs. The horizontal synchronizing signal BD is taken in from the printer B via JRI and is input to the clock generator 309. In the clock generator 309, C is synchronized with the horizontal sync signal BD.
CD signal transmission clocks and shift memory read / write clocks are generated. Further, the size signal indicating the size of the paper loaded in the printer is also output from the printer B to the reader A via the connectors JRI and JRI.

FIG. 4 shows the configuration of the document position detection unit 307 that detects document coordinates.

The main scanning counter 351 is a down counter and the main scanning 1
It represents the scanning position in the line. This counter 351
Is set to the maximum value in the main scanning direction (X direction) by the horizontal synchronizing signal HSYNC which is a synchronizing signal for each line, and counts down every time the image data clock CLK is input. The sub-scanning counter 352 is an up counter which is reset to "0" at the rising edge of VSYNC (image leading edge signal) and counts up with the HSYNC signal to indicate the scanning position in the sub-scanning direction.

Before scanning the original image, the CCD 1 performs pre-scanning for detecting the original coordinate. The image data viDE binarized by the pre-scan is input to the shift register 301 in units of 8 bits. Gate circuit 30 when 8-bit input is completed
In the case of 2, all 8 bit data are checked for white images (O level signals), and if all 8 bit data are white images, 1 is output to the signal line 303. The F / F 304 is set when the first 8-bit white appears after scanning the original. This F /
The F304 is reset beforehand by VSYNC synchronized with the reading of one screen of the image. Once set, the F / F304 will be set and released until the next VSYNC. When the F / F304 is set, the main scanning counter at that time is added to the latch F / F305.
The value of 351 is loaded. This becomes the X ₁ coordinate value. Further, the latch 306 is loaded with the value of the sub-scanning counter 350 at that time, which becomes the Y ₁ coordinate value. Therefore, (X ₁ , Y ₁ ) is obtained.

The value from the main scanning counter 351 is loaded into the latch 307 each time 1 is output to the signal 303. When the latch 307 is loaded with the value from the main scanning counter when the first 8-bit white appears, the data of the latch 310 (set to the maximum value in the X direction at this VSYNC time) and the comparator 30.
9 is compared in size. If the latch 307 data is smaller, the latch 307 data is loaded into the latch 310. At this time, the value of the sub-scanning counter is loaded in the latch 311. This operation is processed until the next 8 bits enter the shift register 301. Thus, if the data of the latches 307 and 310 is performed for the entire image area, the minimum value in the original area X direction remains in the latch 310, and the coordinate in the Y direction at this time remains in the latch 311. Since the main scanning counter 351 is a down counter, the coordinate corresponding to the minimum value in the X direction represents the farthest coordinate from the scanning start point in the main scanning direction. This is (X ₃ , Y ₃ ).

The F / F 312 is a F / F which is set at the time when the first 8-bit white appears for each main scanning line, is reset by the horizontal synchronizing signal HSYNC, is set at the first 8-bit white, and is held until the next HSYNC. At the time when this F / F 312 is set, the value of the main scanning counter corresponding to the position of the white signal first appearing in one line is set in the latch 313. Then, the magnitude is compared by the latch 315 and the comparator 316. The latch 315 is set to the minimum value "0" in the X direction when VSYNC occurs. If the data in latch 315 is less than or equal to the data in latch 313, signal 317 becomes active and the data in latch 313 is loaded into latch 315. This operation is HSYNC-
Performed between HSYNC. When the above comparison operation is performed on the entire image area, the maximum value of the document coordinates in the X direction, that is, the X coordinate of the white signal at the point closest to the scanning start point in the main scanning direction remains in the latch 315. This is X ₂ . Also, when the signal line 317 outputs, the value from the sub-scan is the latch 318.
Loaded in. This becomes Y ₂ , and the (X ₂ , Y ₂ ) coordinate is obtained.

Every time 8 bit white appears in the latches 319 and 320, the value of the main scanning counter and the value of the sub scanning counter at that time are loaded. Therefore, 8 bit white appears at the end when the pre-scan of the original is completed. The count value at that point remains in the counter. This is (X ₄ , Y ₄ ).

The above eight latches (306,311,320,318,305,310,31
The data line 9) is connected to the bus line BUS of the CPU 308 in FIG. 3, and the CPU 308 will read this data at the end of the previous scan.

As a result, the coordinates P _{1 to} P ₄ of the four corners of the original placed on the original table glass are obtained. Further, as the document size, the length DX in the main scanning direction and the length DY in the sub scanning direction of the document are obtained from these coordinates.

FIG. 5 shows a circuit diagram of the shift memory unit 303. As described above, the shift memory unit 303 is provided with a shift memory for two lines, but since the control is common, FIG. 5 shows the control configuration for only one shift memory. The write address counter 904 is an address counter when writing data in the shift memory 907, and the read address counter 905 is an address counter when reading data from the shift memory 907. The address selector 906 is for receiving a command from the CPT 308 via the I / O port 901 and selecting either the address signal of the ride address counter 904 or the address signal of the read address counter 905 to address the shift memory 907. is there.

The I / O registers 902 and 903 are the write address counter 904,
The read address counter 905 has a preset value of C
This is a register that the PU 308 gives.

Both the write address counter 904 and the read address counter 905 are down counters, to which the WST signal and the RST signal for instructing the start of the count operation are input, and the write clock WCLK to the shift memory 907 and the read clock RCLK to the shift memory 907. Is entered.

Reference numeral 306 is a trimming processing unit 306 shown in the third illustration,
6 is an exclusive OR gate for determining the image area, and signal OF is a signal for controlling it. When 1 is set, the inside of the frame determined by the ST counter 912 and EN counter 913 is masked, and the outside of the frame is used as the output image line, and when 0 is set. The inside of the frame is used as the output image and the outside of the frame is masked.

Reference numeral 910 is an AND gate for controlling the output of the image data output from the shift memory 907 and converted into a binary signal via the density processing unit 908. Reference numeral 917 is for determining whether the mask portion is output as white or black. At the gate, BB outputs a black signal when it is 1 and a white signal when it is 0.

911 ViDE the image output output by the gates 910 and 917.
, 909 is an exclusive OR gate for black and white image inversion control, and IN is an original image when the signal controlling it is 1, and it is inverted when it is 0. Each signal is output by the CPU 308 in the mode designated by the operator.

The ST counter 912 and the EN counter 913 are a start bit counter and an end bit counter, respectively, for outputting an image only to a predetermined area, and the CPU 308 presets count data for the gate via the I / O. To do.

The flip-flop 914 is set by the count-up of the ST counter 912 and reset by the count-up of the EN counter 913. The operation is shown in FIG.

For example, when the OF signal is 1, when the Q of the F / F 914 becomes 1 by the count up of the ST counter 912, the output of the gate 915 becomes 0, and the gate 9 continues until the EN counter 913 counts up.
There is no output of 10 and it is masked. Instead, the output of the gate 916 is 1 during that time, so that when the BB signal is 1, the gate 917 is 1 and the gate 911 outputs 1 to serve as a black mask. On the contrary, O
When F = 1 and BB = 0, white mask is applied. When OF = 0, the outputs of the gates 915 and 916 are 1,0, respectively, so BB = 1.
When, the outside of the trimming area is black, and when OF = 0, BB = 0, the outside of the trimming area is white.

 Next, the principle of scaling will be described.

Zooming in the sub-scanning direction is performed by making the scanning speed of the optical system variable. The CPU308 calculates the speed of the DC servo motor from the magnification specified by the operator, and the PL corresponding to that speed is calculated.
The L frequency is calculated and preset in the motor driver 311 in FIG. 311 before scanning. The transport speed of printer B is always
Since it is 180mm / sec, the speed is 180mm when it is magnified twice.
The optical system is moved at a speed of 90 mm / sec, which is 1/2 of that of / sec, and when it is reduced to 1/2, it is moved at a speed of 360 mm / sec, which is twice as fast.

 The scaling in the main scanning direction will be described with reference to FIG.

The serial signal after A / D conversion from CCD1 output at a constant frequency is sampled at the clock rate according to the magnification. At the same size, as shown in FIG. 7 (A), the data is written in the shift memory 907 by the write clock WCLK which is equal to the transfer clock CLK from the CCD, or the data is transferred to the printer B as shown in FIG. 7 (B). Read from the shift memory with a read clock RCLK equal to the output clock VCLK.

For example, at the time of 1/2 reduction, the write clock WCLK to the shift memory 907 is 1/2 of the transfer clock CLK as shown in FIG. 7 (C).
, The original information is sampled for every two bits and written in the shift memory 907. Then, as shown in FIG. 7B, the read clock RCLK that is the same as the output clock VCLK is read to perform 1/2 reduction.

In addition, when expanding to 2 times, when writing to the shift memory 907, writing is performed as shown in FIG.
When reading from the shift memory 907, as shown in FIG. 7 (D), if the output clock VCLK to the printer B is read out at a clock rate RCLK that is 1/2 of the clock rate VCLK, one bit is added to each bit of original information. Then, double expansion can be performed.

The principle of image movement will be described with reference to FIGS. 8 and 9.

The sub-scanning direction is executed by changing the document image scan timing and the VSYNC output timing to the printer B as shown in FIG.

When reading an image, the optical system is When the position reaches, the output that does not move is obtained as shown in the figure that outputs ViDEO together with VSYNC.

When the optical system reaches the position of, the output moved to the rear like ViDEO output with VSYNC is obtained, and also When the optical system reaches the position of, the output moved to the front is maintained like VSYNC and ViDEO are output.

Regarding the main scanning direction, as shown in FIG.
Write address counter via I / O registers 902, 903
This is performed by relatively changing the down count start address given to 904 and the read address counter 905.

For example, the write start address WAD to the shift memory 907
For R, the image data X0 corresponding to the address WADR is moved to the right with respect to the output main scanning width ViDEO ENABLE as if the read start address is RADR1. Further, the data X3 corresponding to the shift memory address Q is moved to the left with respect to the ViDEO ENABLE as in the case where the read start address is RADR2. Effective image section signal shown in FIG.
What is VIDEO ENABLE? ST counter 912 and EN counter 9 in Fig. 5.
This is a trimming section signal composed of 13 and F / F 914 and gates 915, 916, 917, 910, 911. The shift memory 90 of FIG.
It is necessary for the invalid image outside the address 0 to WADR at 7 to be a white signal.

Timings of interface signals exchanged between the reader A and the printer will be described with reference to FIGS. 10 and 11.

The BEAM DETECT signal BD is for synchronizing the scanning of the reader and the image signal output with the rotation of the polygon scanner of the printer B when the reader A is connected to the printer B, and corresponds to the leading edge signal of each main scanning line. ViDEO is an image signal,
Each line outputs 4678 pixels with a width of approximately 56 ns per pixel. ViDEO is synchronized with BD when it is connected to printer B, and is output in synchronization with an internal pseudo-horizontal synchronization signal (hereinafter referred to as HSYNC) when transmitting to another unit. ViDEO ENARLE
Is a section signal in which 4678 of the image data is output, and is output in synchronization with BD or HSYNC.

 VSYNC is a signal indicating an image section in the sub-scanning direction.

The PRiNT REQVEST signal is a signal indicating the paper feed possible state in the printer B, and the reader A responds to this by issuing a paper feed command by the PRiN signal, and then the magnification, trimming area and movement amount corresponding to the copy mode set by the operator. After the time T ₁ that takes into account the above, VDE is output together with VSYNC.

OHP and VTOP are input signals from the sensors shown in FIGS. 313 and 314 in FIG. 3, which indicate the position of the optical system of the reader A. BAC
K and FORWARD are signals for controlling the backward movement and the forward movement given from the CPU unit 308 in FIG. 3 to the motor driver 311 for driving the optical system.

In Fig. 11, S.DATA, S.CLK, CBUSY, SBUSY are readers A
And a printer B for communication. S.
Both DATA and S.CLK are 8-bit serial data and clock, and both are bidirectional lines. CBUSY is leader A
Is output when the data and the clock are output, and SBUSY is output when the printer B outputs the data and the clock.

As an example of the contents communicated serially, the reader A to the printer B as shown in the timing chart of FIG.
There is a copy start or copy stop command.

An outline of the editing function (trimming / auto mode) will be described with reference to FIGS. 12 to 14.

In this mode, when the size DX, MX, DY, MY obtained by multiplying the recognized document OG size DX, DY by the magnifications MX, MY respectively is larger than the paper size PX, PY set in printer B, the document is automatically By dividing the image into multiple areas and reproducing the image of each area on multiple sheets (main scanning NX sheets, sub-scanning NY sheets, total NX / NY sheets) of paper, as shown in Fig. 13, DX, MX, DY・ A copy of MY output size is obtained. DX / MX at this time>
If PX and DY / MY> PY, it will be as shown in Fig. 13, but DX / MX
When PX and DY / MYPY, as shown in FIG. 14 (A), one sheet is sufficient for the sub-scanning direction, and the center is automatically moved in the sub-scanning direction. On the contrary, DX / MXPX
When DY / MY> PY, the center is automatically moved to one sheet in the main scanning direction as shown in FIG. 14 (B). Also DX
-When MXPX and DY / MYPY, as shown in Fig. 14 (C), one sheet in both the main and sub scanning directions, that is, one sheet in total is sufficient and the center is automatically moved in both scanning directions.

In this way, the operator needs to select what should be selected by the operator, placing importance on the practicality and operability of the trimming auto mode that can enlarge the original image to a size larger than the set paper size (A3 or larger. ) Only the output size is set, and the paper used, the magnification, and the number of divisions are automatically set.

Figure 15 shows the procedure for setting the editing function trimming and auto mode.

Copying is not in progress on the display section 123 of the operation section A1 in FIG.
Moreover, when there is no error, it is displayed like, and it is displayed like pressing soft key SK6. Indicates that trimming is not set as an editing function, and further that center movement is set as a moving function.

In, pressing SK6 corresponding to ETC displays the current setting mode of other functions. On the other hand, if you press SK4 or SK5 at, you can set other movement functions. Also,
When pressing SK1 or SK2 at.

Shows that there are four editing functions, trimming, masking, book, and those cancels, and that none of them are currently selected by "None !!". When SK1 is pressed here, the trimming mode setting is displayed as if it were entered, and the automatic document division, that is, the trim auto mode or the operator's arbitrary mode for the trimming area is selected.

When SK3 is pressed at, trim auto is selected and the display becomes as shown. , Is a table for selecting what is desired as the combined size of the copy results that are automatically divided and output on a plurality of sheets.
Then, the size of the B series is displayed.

To press SK5 corresponding to "ETC", press SK5 corresponding to "ETC". You can return to the display by pressing SK6 corresponding to "BACK" with. The size displayed in and is the maximum paper size
It is larger than A3 and has a maximum document size of A3 x maximum magnification of 400%, that is, smaller than twice A0.

The trim auto mode setting is completed by selecting the soft key corresponding to the desired size with and. Is an example when SK1 corresponding to “B0” is selected.

FIG. 16 shows the operation procedure of the CPU 308 when executing the edit function trim auto copy. First, a preliminary scan (pre-scanning) for recognizing the position and size of the document is performed. (SP
501). By the coordinate detection logic described above, for example, as shown in FIG. 12 (A), the original OG placed on the glass 2 is scanned.
Get the coordinates of P ₀ , P ₁ and get data area DX0, DX1, DY0, DY on RAM
Set to 1. Further, the size DX1-DX0 in the X direction (main scanning direction) and the sizes DY1-DY0 in the Y direction (sub scanning direction) of the document calculated from the coordinates are set in the data areas DX, DY on the RAM (SP502). ).

Next, the lengths in both the main scanning direction and the sub scanning direction corresponding to the final output combination size selected by the operator according to the setting of FIG. 15 are set in the areas RX and RY on the RAM (SP503).

Main scanning direction magnification ratio MX = RX / DX and sub-scanning direction magnification ratio MY = RY / DY are calculated from the document size DX, DY and output size RX, RY (SP504). Then, the smaller of MX and MY is searched, and the smaller one is the common magnification MX, MY in the main-scanning and sub-scanning directions.
To the data area on the RAM as (SP505, SP50
6). Also, the maximum copyable magnification is 400% (SP504, SP
505, SP506) when the calculation result exceeds 400%, MX = MY = 40
Set to 0% (SP507).

Based on the magnification determined above, output size RX, RY again
Is recalculated and set in RAM (SP508).

Next, select the optimum paper from (SP509) to (SP516).

First, the paper size of the upper cassette is set to the data areas PX _U and PY _U on the RAM, and the paper size of the lower cassette is set to the data areas PX _L and PY _L on the RAM (SP509). Then RX
_{= NX U · PX U -aX U} (0 <aX U <PX U) consisting of NX _U and RY = NY _{U
· PY U -Y U (0 <} aY U <PY U) made to calculate the NY _U to excisional to the data area on the RAM (SP510). Based on this calculation, the output size selected by the operator can be composed of NX _U sheets in the main scanning direction and NY _U sheets in the sub scanning direction to compose the upper cassette paper.
You can see that you need NX _U / NY _U sheets of paper.

In likewise (SP511), NX _L by calculating also the lower cassette, seeking NY _L to excisional the data area on the RAM.

Next, compare NX _U / NY _U with NX _L / NY _L and select the cassette tray with the smaller number of required sheets (SP512, SP514, SP515,
SP516). If the required number is the same, aX _U・ aY _U and aX _L・ aY
Compare _L. (SP513). The aXi, aYi (i = _U , _L ) correspond to the total overlapping width of the sheets when a plurality of sheets are arranged to form a desired output size. Therefore, in (SP513), select the cassette stage with the smaller overlapping width.

Thus, the size of the trimming area is calculated back by TX = PX / MX, TY = PY / MY from the automatically selected paper size PX, PY and the calculated magnifications MX, MY, and set in the data area TX, TY in RAM ( SP517). Next, in order to read the document size DX by trimming the area of size TX above in the main scanning direction NX times from NX, NY determined in (SP515) or (SP516). Then, the trimming areas adjacent to each other by the length of SX are overlapped in the main scanning direction. Similarly for the sub-scanning direction And then set SX and SY to the area on RAM (SP51
8).

The above NX, NY, TX, TY, SX, SY are shown in FIG. 12 (B). A counter for executing trimming in the order shown by the arrow in FIG. 12 (B) is secured in the areas i and j on the RAM and the initial value Q is set (SP519).

In this way, the operator only has to set the finally required output size, and the CPU 308 automatically calculates the number of sheets required to form that size. Also, before starting image scanning, the number display section 111 displays NX / NY (the number of trimmings) obtained as described above (SP52).
0).

Next, the counters i and j for executing trimming are each incremented by 1 (SP521, SP522). Generally, “(i, j) trimming area = jth time in the main scanning direction, ith time in the sub scanning direction” shown in FIG.
That is, if the coordinates that determine the NY (i-1) + jth trimming area are KXio, KXil, KYjo, KYjl, these are the first
As can be seen from Fig. 2 (B), KXio = DXo + (i + 1) ・
(TX-SX), KXil = KXio + TX KYio = DYo + (j-1) ・
(TY-SY), KYil = KYio + TY. These are calculated and set in the area on RAM (SP523).

Next, while performing image scanning, the shift memory unit 30 is based on the trimming area coordinates calculated previously.
By using the above-mentioned method 3, only the necessary area is trimmed by the above-described means, and the scaling processing of MX and MY is performed and output to the designated paper (SP524).

When the image reading is completed, the count display section 111 displays 1 countdown, that is, NXNY-NY (-i-1)-
j is displayed (SP525). The change in the number display area is shown in FIG. 17 for the case of NX = 2 and NY = 3. This allows the operator to know how many more sheets will be output.

Next, it is judged whether NY trimming is completed in the sub-scanning direction (SP526). If it has not been completed, the trimming execution counter j in the sub-scanning direction is incremented by 1 (SP522), and the process proceeds to the next trimming process. If completed, trimming execution counter j in the sub-scanning direction
After clearing to 0 (SP527), the main scanning direction is NX
It is determined whether the trimming has been completed (SP528).
If not completed, the main scanning direction trimming execution counter i is incremented by 1 (SP521), and since the sub scanning direction counter j is cleared to 0, this is incremented by 1 for the next trimming processing. Go to If it has been completed, the trimming process is performed NX, NY times in total, and the copy output of NX / NY sheets has been completed, so the copy in this mode ends.

By the above procedure, the original OG placed on the original platen glass 2 as shown in FIG. 12 (A), the trimming areas of the sizes TX, TY are made SX, SY as shown in FIG. 12 (B). It is possible to automatically obtain a total of NX / NY copy output by dividing into NX / NY pieces while sequentially overlapping and trimming in the direction of the arrow.

On the other hand, the output copy is printed in the main scanning direction as shown in Fig. 13.
MX / SX By superposing and pasting MY / SY in the sub-scanning direction, the main scanning length DX / MX = RX and the sub-scanning length DY / MY = RY, which would not have been obtained with a single copy sheet, are obtained. An enlarged copy is obtained.

In this embodiment, since the maximum paper size is A3 and the maximum magnification is 400%, the maximum output obtained is 188 mm in the main scanning direction and 1680 mm in the sub scanning direction, that is, two A0 sheets.

In the above description, the readable original size and the maximum recording paper size are both A3 size, but the present invention is not limited to this and can be applied to various sized originals and recording papers.

Further, it goes without saying that the size detection sensor may be used for the document size detection without using the reading sensor as well.

[Effect]

As described above, according to the present invention, a calculation unit that calculates the enlargement ratio based on the original image size and the set reproduction image size, and a plurality of recording paper sizes and a plurality of reproduction image sizes based on the set reproduction image size. The number of divisions of the original image relating to the recording paper size is calculated, and a selection means for selecting the recording paper size with the smaller number of divisions is provided, and the original image is divided according to the number of divisions calculated for the selected recording paper size Each divided original image is enlarged according to the calculated enlargement ratio and played back on each of the multiple recording papers of the selected recording paper size, so that the operator does not have to set the enlargement ratio and recording paper size. By setting the desired playback image size by the operator, it is not possible to calculate the enlargement ratio to obtain the desired playback image size and select the recording paper size that reduces the number of divisions. Therefore, it is possible to efficiently perform an image reproduction operation of enlarging a document image to a reproduction image size larger than that of the recording paper, dividing the enlarged document image, and reproducing each of the plurality of recording papers by a simple operation of the operator. Become.

[Brief description of drawings]

FIG. 1-1 is an external view of the reader / printer, FIG. 1-2 is a cross-sectional view of the reader / printer, FIG. 2 is a detailed view of the operation unit, FIG. 3 is a system block diagram of the reader, and FIG. Is a block diagram of the document position coordinate detection circuit, and FIG. 5 is a block circuit diagram of the shift memory unit capable of editing, moving and scaling functions.
FIG. 6 is a timing chart for trimming execution, FIG. 7 is a schematic diagram for explaining the scaling operation, and FIGS. 8 and 9 are explanatory diagrams of the image moving operation, FIGS. 10 and 11. Is a timing chart in the interface, FIG. 12 is an explanatory view of the area dividing operation of the original image, FIGS. 13 and 14 are views showing the divided output state of the image, and FIG. 15 is a setting procedure of the copy mode. FIG. 16 and FIG. 16 are execution flow charts of the split output function, and FIG. 17 is a diagram showing the display operation of the number display section. A is a reader, B is a printer, 1 is a CCD, 303 is a shift memory section, 306 Is a trimming processing unit.

Claims (1)

(57) [Claims] 1. An image reproducing apparatus for enlarging an original image to a reproduction image size larger than a recording sheet, dividing the enlarged original image and reproducing each of a plurality of recording sheets, and setting means for setting the reproduction image size. Calculating means for calculating the enlargement ratio based on the original image size and the set reproduction image size, and the number of divisions of the original image for the plurality of recording paper sizes based on the plurality of recording paper sizes and the set reproduction image size. Selection means for calculating and selecting the recording paper size with the smaller number of divisions, and dividing the original image according to the number of divisions calculated for the selected recording paper size, and calculating the enlargement ratio for each of the divided original images. An image reproducing apparatus comprising: a reproducing unit that enlarges the recording sheet according to the selected recording sheet size and reproduces the recording sheet having a selected recording sheet size.