JP3082935B2 - Image processing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image processing apparatus having an image editing function.

[Conventional technology]

Conventionally, some copying machines have a function to automatically detect the position and size of the original placed on the platen glass and automatically select the optimal size paper. It is equipped with a function that automatically changes the magnification.

[Problems to be solved by the invention]

However, in the above-described conventional example, only one document is placed on the platen glass. For example, even if a copy document is placed, the document is processed as one document. However, there are the following disadvantages.

For example, when copying a plurality of originals on a single sheet, if the originals are not carefully placed, the gaps between the originals may be dark or uneven, and the arrangement may not be uniform. there were. Further, when copying a plurality of documents having different sizes or a plurality of small documents which are difficult to be conveyed by the automatic document feeder, it is necessary to replace the documents one by one and press the start key.

[Means for solving the problem]

The present invention has been made in view of the above points, and a position detecting unit that detects a mounting position of a plurality of documents placed on a document table with a gap on the document table, and the plurality of documents. Scanning means for outputting an image signal by scanning the platen on which is placed, based on the detection output of the device position of the plurality of documents by the position detection means,
Extracting means for extracting an image signal corresponding to each of the plurality of originals from an image signal output from the scanning means,
It is an object of the present invention to provide an image processing apparatus having processing means for performing different image processing on image signals corresponding to each of the plurality of originals extracted by the extracting means.

Thus, for example, it is configured to realize a function of copying each original on another sheet by one start key, filling a plurality of originals, adjusting the size and position, and copying on one sheet. Things.

〔Example〕

FIG. 1 shows a structural diagram of a copying apparatus to which the present invention is applied.
This apparatus comprises two units, a reader A for reading a document image and a printer B for reproducing an image on a recording material.

The document is placed downward on the platen glass 3 and pressed down on the glass 3 by the document cover 4. The original is illuminated by a fluorescent lamp 2 and the reflected light is reflected by mirrors 5 and 7.
The light is condensed on the surface of the CCD 1 via 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 PPL by the pulse motor 26. Outbound at 1: 1 (from left to right)
180mm / sec, round trip (from right to left) is 8 regardless of magnification
00 mm / sec. The maximum document size that can be processed is A3 and the resolution is 400 dots / inch, so the number of bits for CCD1 is Bit required.

Therefore, a 5000-bit CCD is used for the reader A. The main scanning cycle is It is.

An original image is line-scanned by the CCD 1 to obtain an image signal indicating image density.

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

The image signal from the reader A is applied to a semiconductor laser, is subjected to electro-optical conversion, is irradiated to a high-speed rotating polyhedral mirror via a collimator lens, and the reflected light is incident on the photosensitive member 8 and scanned. The pre-discharger 9 and the pre-discharge lamp 1 as process components that enable image formation on the photoconductor 8
0, temporary charger 11, secondary charger 12, front exposure lamp 13,
Developing unit 14, paper feed cassette 15, paper feed roller 16, paper feed guide
17, 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. Printer B is a so-called laser printer.

The copying apparatus of this example has intelligence for image editing and the like, and its function is to change the magnification at an arbitrary magnification in the range of 0.35 to 4.0 times in 1% increments, to trim the image of only the specified area, and to print the trimmed image on paper. It has a moving function of moving the document 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 a system block diagram of the reader A.

The CCD reading unit 301 includes a CCD, a CCD clock driver, and a CCD.
A / A to convert it from analog to digital
A D converter and the like are built in. CCD reading units 301 to 6
Image data converted to a digital signal of 64 bits (64 gradations) is output and input to the shading correction unit 302.

After the shading correction unit 302 detects and corrects the amount of shading of the light source, lens, and the like, the image signal is temporarily stored in the shift memory unit 303. The shift memory unit 303 has two lines of shift memories.
When the image data of the line is being written to the first memory, the image data of the (N-1) th line is read from the second memory. The shift memory unit 202 further includes a write address counter for writing image data to the shift memory, a read address counter for reading image data, and an address selector circuit for switching address signals from the two counters.

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 to the shift memory unit 303 and the clock for reading from the shift memory unit 303 and the read timing.

The image signal output from the shift memory unit 303 is input to the density processing unit 305, converted into a density desired by the operator, and output to the trimming processing unit 306. The trimming processing unit 306 forcibly processes an arbitrary section of the main scanning line image data to “0”, thereby enabling trimming and editing of the image.

The image signal output from the density processing unit 305 is also input to the document position detection unit 307 after being binarized.

The CPU unit 308 includes a well-known micro computer including a CPU, a ROM, a RAM, a timer circuit, and an I / O interface. The CPU unit 308 controls the operation unit 310, controls the reader A according to the setting from the operator, and controls the printer B by serial communication. Reference numeral 311 denotes a pulse motor driver for driving a pulse motor 26 for moving the mirror 7 and the mirror 5, and the CPU 308 presets speed data according to the magnification. Reference numeral 312 denotes a fluorescent light driver which controls ON / OFF of the fluorescent light 2 and light quantity control at the time of lighting. A position sensor 313 allows the CPU 308 to know the position of the optical system.

The printer B is connected to the printer B through a connector JP1 of the printer B. Control signals necessary for image data communication and serial communication are exchanged between the reader A and the printer B.

The horizontal period signal BD is fetched from the printer B via JR1 and input to the clock generator 309. In the clock generator 309, the CCD is synchronized with the horizontal synchronization signal BD.
A signal transmission clock, a shift memory read / write clock, and the like are generated. Further, a size signal indicating the size of the sheet adhered to the printer B is also output from the printer B to the reader A via the connectors JP1 and JR1.

FIG. 3 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. 3 shows a control configuration of only one shift memory. The write address counter 904 is an address counter for writing data to the shift memory 907, and the read address counter 905 is an address counter for reading data from the shift memory 907. The address selector 906 receives a command from the CPU 308 via the I / O port 901 and selects either the address signal of the write address counter 904 or the address signal of the read address counter 905 to address the shift memory 907. is there.

I / O registers 902 and 903 are write address counters 904,
The read address counter 905 stores the preset values in the CPU 30 respectively.
8 is a register to give.

The ride address counter 904 and the read address counter 905 are both down counters, each receiving a WST signal and an RST signal for instructing the start of a count operation, and inputting a write clock WCLK to the shift memory 907 and a read clock RCLK from the shift memory. Is done.

Reference numeral 306 denotes a trimming processing unit 306 shown in FIG. 3, which sets the inside of the frame determined by the ST counter 912 and the EN counter 913 as an output image and masks the outside of the frame.

An AND gate 910 controls the output of the image data output from the shift memory 907 and passed through the density processing unit 908 and outputs it as VIDEO.

An ST counter 912 and an EN counter 913 are a start bit counter and an end bit counter for outputting an image only to a predetermined area, respectively.
PU308 presets the count data for the gate.

The flip-flop 914 is set at the count-up of the ST counter 912 and outputs a gate signal to the AND gate 910 reset at the count-up of the EN counter 913.

 Next, the principle of zooming will be described.

Zooming in the sub-scanning direction is performed by making the scan speed of the optical system variable. The CPU 308 calculates the speed of the pulse motor 26 from the magnification designated by the operator, calculates a pulse frequency corresponding to the speed, and presets it to the motor driver 311 in FIG. 311 before scanning. The transport speed of the printer B is always 180mm / sec.
Move the optical system at a speed of 90 mm / sec, which is 1/2 the speed of 80 mm / sec.
When reducing to / 2, move at twice the speed of 360mm / sec.

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

A / D-converted serial signals from CCD1 output at a constant frequency are sampled at a clock rate corresponding to the magnification. At the same magnification, data is written in the shift memory 907 with a write clock WCLK equal to the transfer clock CLK from the CCD as shown in FIG. 4A, or output to the printer B as shown in FIG. 4B. Read from shift memory with read clock RCLK equal to clock VCLK.

For example, at the time of 1/2 reduction, the write clock WCLK to the shift memory 907 is reduced to 1/2 of the transfer clock CLK as shown in FIG.
The original information is sampled one bit at a time for two bits and written in the shift memory 907. Then, as shown in FIG. 4 (B), the read clock RCLK which is the same as the output clock VCLK is read out and the half reduction is performed.

When the data is enlarged twice, writing to the shift memory 907 is performed as shown in FIG.
At the time of reading from the shift memory 907, as shown in FIG. 4 (D), if the read clock RCLK having a clock rate 1/2 that of the output clock VCLK to the printer B is read, one bit is added to each bit of the original information. Thus, a two-fold enlargement can be performed.

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

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

If the video system outputs VIDEO together with VSYNC when the optical system reaches the position 1 with respect to the document at the time of image reading, an output that does not move is obtained as shown in FIG. When VIDEO is output together with VSYNC when the optical system reaches the position 2, an output moved backward as shown in (2) is obtained. When VSYNC and VIDEO are output when the optical system reaches the position 3, ( An output moved forward as in 3) is obtained.

As for the main scanning direction, as shown in FIG.
Write address counter 9 via O registers 902 and 903
This is performed by relatively changing the down count start address given to 04 and the read address counter 905.

For example, the write start address WAD to the shift memory 907
If the read start address for R is RADR1, (1)
The output main scan width is VIDEO ENABLE and the address is WADR.
Image data X ₀ is moved to the right, which corresponds to. Further, when the read start address and RADR2, also the data X ₃ corresponding to the shift memory address 0 as (2) VIDEO
Move left to ENABLE. The effective image section signal VIDEO ENABLE shown in FIG. 6 is equivalent to the ST counter 912 in FIG.
Counter 913 and F / F914, gates 915, 916, 917, 910, 9
This is a trimming section signal composed of 11 and is necessary for making an invalid image outside the area between address 0 and WADR in the shift memory 907 in FIG. 6 a white signal.

 The concept of document coordinate detection will be described.

The pressure plate 4 is mirror-finished, and the reflected light obtained by illuminating the pressure plate 4 is specularly reflected, and the image reading sensor CC
It is not condensed on D1 and has a black level in luminance.

In addition, the background of a normal document is white, and its image signal has a white level in terms of luminance.

Therefore, as shown in FIG. 8, detecting the position of the document placed on the platen can be realized by detecting the position of the white signal in the black signal indicated by the hatched portion.

That is, the optical system detects the main scanning positions XS and XE of the document at an arbitrary sub-scanning position Yi while scanning the platen from the reference point SP to the rear end EP in the sub-scanning direction.

FIG. 7 shows the logic for detecting the coordinates and will be described below.

The main scanning counter 401 is an up counter, and indicates a scanning position in one main scanning line. This counter 40
1 is reset by the horizontal synchronizing signal HSYNC generated at the beginning of each main scan, and counts up every time the image data clock CLK is input. The binarized image data VIDEO after the shading correction is input to the shift register 402 in units of 8 bits in synchronization with the image data clock CLK. When the input of 8 bits is completed, the gate circuit 403 checks whether or not all the 8 bits are white images. If YES, the gate circuit 403 outputs "1" to the signal line 411.

The flip-flop 410 is set when the first 8-bit white appears on each main scan line. This flip-flop is reset by the HSYNC signal in advance.

After that, the setting is left until the next HSYNC comes. EN output from CPU 308 when flip-flop 410 is set
If the signal is "1", the gate 404 outputs "1", so that the latch 409 is loaded with the value of the main scanning counter 401 at that time, and this becomes the _XS coordinate value.

Each time the gate 403 outputs 1, the main scanning counter 401
Is loaded into the latch 405. When the value from the main scan counter 401 when the first 8-bit white appears is loaded into the latch 405, the data of the latch 408 is compared in magnitude with the comparator 406, and the data of the latch 405 is larger than the CPU 308.
When the signal EN output from the latch is 1, the data of the latch 405 is loaded into the latch 408. This operation is processed until the next 8-bit image data VIDEO enters the shift register 402.

If the comparison operation between the latches 405 and 408 is continued during one main scanning line, the main scanning coordinate at the time when the last 8-bit white appears in the main scanning direction remains on the latch 408, and this becomes the _XE coordinate value.

FIG. 9 shows an example of a timing chart relating to coordinate detection.

The horizontal synchronizing signal HSYNC is simultaneously in the effective section of the image, that is,
This case corresponds to the main scanning section of the platen. This HSYN
The CPU 308 is configured to generate an interrupt signal INT1 at each falling edge of C.

The CPU 308 moves the optical system in the sub-scanning direction, and when detecting that the optical system has reached the reference point SP, turns on the EN signal. The detection circuit shown in FIG. 7 performs the detection operation in units of HSYNC during the ON period of the EN signal.

On the other hand, when the EN signal is turned on, the CPU 308 outputs the HSYNC interrupt INT
Count 1 twice and turn off the EN signal. This is the EN signal
There is no guarantee that the ON timing will be synchronized with HSYNC.
This is because correct detection over the entire main scanning section cannot be performed in P, which is a detection section until the first interrupt INT1. EN
After the signal is turned on, the above-mentioned coordinate values X _S and X _E fetched in the second INT1 interrupt can be trusted because they are detected coordinates in the detection section Q over the entire main scanning section. After capturing detection coordinates
Turn on the EN signal, wait for the next INT1, and repeat thereafter.

With the above configuration and control, the arbitrary position Yi
The main scanning section of the document in the X _S, X _E can be detected.

FIG. 10 shows a control flow chart for detecting the number of a plurality of documents placed on the document glass 3 and the position and size of each document, and will be described below.

First, the counters on the RAM used in the subsequent control are initialized (SP101). The lamp 2 is turned on to start the optical system. (SP102).

When the optical system reaches the platen reference point SP (SP103), the aforementioned EN signal is turned on (SP104). Wait for the second interrupt signal INT1 by HSYNC (SP105).
FF (SP106), counter CNT on RAM indicating sub-scanning position
Is added by 2 (SP107).

Next area X _S in the RAM reading an original coordinate value from the latch shown in the aforementioned document coordinate detection circuit, and excisional to X _E (S
P108). If X _S ≧ X _E , it is determined that the document does not exist,
X _S <determines that the manuscript if X _E is present (SP109).

On the other hand, indicates whether or not the document was present up to the previous sub-scanning position.
A flag E in the RAM is prepared, and is set to 0 at initialization, and becomes 1 when the state changes from the absence of the original to the presence of the original due to the sub-scanning, and changes from the existing state to the absence state. When it does, it becomes 0.

Therefore, from (SP104) to (SP110) until the original can be detected.
Repeat the operation of

When it is determined in step (SP109) that there is a document, it is determined by the flag E whether or not it is determined in the previous sub-scanning position as well (SP119). If E = 0, 1 is set to E, and to excisional the area Y _BS in the RAM of the sub-scanning position CNT sub-scanning tip coordinates of the document (SP 12
1).

Then similarly excisional the area Y _BE in the RAM of the CNT value as the subscanning rear coordinates of the document (SP122). The Y _BE value is updated every interruption process while the document is present. Further, the main scanning coordinates, the read value X _S and X _E, are stored in the area on the RAM. Compared to the minimum value X _BS and a maximum value X _BE up to the previous, stored new minimum value and maximum value of each (SP 123
~ SP126). X _BS and X _BE are initialized and as described later,
When the document is no longer, for example, the maximum value FFFF _HEX X is the X _BS
BE is set to a minimum value of 0.

After the document is once detected, the operations from (SP119) to (SP126) are repeated, and the optical system scan proceeds to the rear end of the document. When the document is exhausted, the process goes through (SP109) and (SP110).
Areas XSi, XEi, YSi, and YE on the RAM are determined using the document coordinate values detected in (SP119) to (SP126) as the position coordinates of the i-th document.
Stored in i (SP111).

i is a counter on the RAM, which is set to 0 at initialization, and is incremented by one each time a document is interrupted (SP113), and counts the number of documents.

The buffer X _BS and X _BE in the RAM for the main coordinate coordinate detection as After storing the detected coordinates above initialization (SP112), which excisional flag E to 0 for the detection of the next original (SP11
Four).

The above operation is repeated till the rear end EP of the document table is reached. When the EP is reached (SP115), the lamp 2 is turned off and the optical system is stopped (SP116). If the flag E is 1 in the EP (SP117), the last document coordinate detection is not completed (SP1).
Return to 11) to force termination. Finally, the number i-1 of detected originals is stored in the area N on the RAM (SP118), and the detection operation is completed.

FIG. 11 shows and explains the concept of the first editing processing embodiment.

In this example, three originals OR1, OR2, and OR3 appropriately placed on the original platen glass 3 as shown in FIG. 3A are transferred onto separate sheets of CP1, CP2, and CP3 as shown in FIG. Copy output is performed as follows. Conventionally, when a document was placed as shown in (A), only a copy output CP as shown in (C) was obtained, but according to this example, three documents of different sizes placed simultaneously were placed in the same size. , And the optimum paper obtained by multiplying each original by a desired magnification can be automatically selected.

FIG. 12 shows a control flowchart of the CPU 308 for executing the editing process shown in FIG. 11, and will be described below.

First, return to the optical system home position (SP201)
After detecting the number of documents on the platen and the respective position coordinates in the above-described procedure (SP202), the optical system is returned to the home position again (SP203), and the copying operation starts thereafter.

First, the counter i on the RAM that counts the number of processed documents is cleared to 0 (SP20), and the coordinates XSi, XEi, YSi, and YEi of the document corresponding to the counter value i are set as areas to be trimmed (SP205).

Next, it is determined whether the set mode is either the automatic paper selection or the automatic scaling (SP206, SP207).

First, in the case of automatic paper selection, the set main scanning and sub-scanning magnifications are set to MX and MY (SP208), and the sizes CX and CY to be output are set to CX = (XEi−XS
i) × MX, CY = (YEi-YSi) × MY
09), and based on this, PX and PY are obtained with a paper size satisfying CX ≦ PX and CY ≦ PY (SP210).

When using auto scaling, first select the size of the selected paper.
Set in the areas PX and PY on the RAM (SP211), then set the main and sub scanning magnifications as MX = PX / (XEi-XSi), MY = PY / (YEi-Y
Si) (SP212). To set the same magnification in each of the main and sub scanning directions, reset the smaller of MX and MY to both. Finally, the output sizes CX and CY are obtained as in (SP209) (SP213).

When neither auto paper selection nor auto scaling is performed, only the output size is calculated because the magnification and paper are already set. (SP214, SP215, SP216).

Paper size PX, PY and output size for each case
Once CX and CY are determined, the top and bottom and left and right margins SX and SY to be provided on the paper are calculated based on the SX = (PX-CX) / 2, SY = (PY
−CY) / 2 (SP217). The margin amount is a parameter necessary for the above-described moving function, and corresponds to the moving amount of the image. In this example, the image is copied at the center of the sheet.

Based on the parameters necessary for the editing process obtained in the above procedure, a copying operation is performed while performing the above-described trimming, moving, and scaling processes on the i-th document (SP218), and further (SP205) to (SP205). The operation of (SP218) is continued while incrementing the counter i by one until it becomes equal to the detected number N of documents (SP219), and then the process is terminated.

As described above, even if a plurality of originals are placed on the original platen glass 3 simultaneously and at appropriate positions, each original can be automatically processed independently.

 FIG. 13 shows an example of the second editing process, which will be described.

The second example is effective when the sides of two appropriately placed originals L and R are not aligned as shown in FIG. In such a case, conventionally, a copy CR output was obtained only as in (C), which was very unsightly.

In this example, in such a case, (B-1) to (B-3)
Copy output CR1 (type 1) with the center of each document aligned, copy output CR2 (type 2) with the top side aligned, as shown in
This is to obtain a copy output CR3 (type 3) in which the lower sides are aligned, and to give a beautifully arranged copy output.

That is, it is realized by moving an image in the main scanning direction for each document based on the coordinates detected for each document.

FIGS. 14 (A) and (B) show and explain a control flow chart of the second editing process shown in FIG.

First, the number N of documents and the position coordinates XSi, XEi, YSi, YEi (i = 0,..., N) of each document are obtained by the above-described method (SP
301-SP304).

Next, the size XLi, YLi of each document is calculated by XLi = XEi−XSi, YLi.
= YEi-YSi (SP305).

As shown in FIG. 13 (B-1, 2, 3), in the second editing example, a plurality of documents are processed as one document. scanning length DY is equal to the distance rear end coordinate YE _N tip coordinates YS _O and the right edge of the document of the leftmost document on the platen glass 3, a DY = YE _N -YS _O. The main scanning length DX is equal to the main scanning length of the largest document in order to align the sides and the center of each document, and DX = max (XL _O ,
…, XL _N ) (SP306).

When the sizes DX and XY corresponding to the document area are obtained as described above, based on these, as in the first editing example, the magnification MX,
Find MY, paper size PX, PY, output size CX, CY (SP
307-SP317).

Further, the sub-scanning margin SY, that is, the moving amount of the image in the sub-scanning direction, is obtained from SY = (PY-CY) / 2 from PY and CY (SP31).
8). This is because the image is copied in the center of the sheet in this example.

Next, after clearing the document number counter i to 0 (SP31
9) Turn on lamp 2 and start the optical system (SP32
0).

Needless to say, the start timing of the optical system and the timing of paper feeding in the printer are adjusted by the sub-scan margin SY.

When the optical system reaches the leading edge YSi of the i-th document (SP32
1) The main scanning coordinates XSi and XEi of the document are set as an image output section to trim only the document portion (SP32).
2).

Next, the main scanning margin amount, that is, the moving amount SX of the image in the main scanning direction.
(SP323). SX differs for each of the three types, as shown in FIG. 13 (B-1 to 13). SX = (PX-XLi x MX) / 2 for Type 1 because the image is copied to the center of the main scan (SP329). For Type 2 the original with the maximum main scan length is aligned with the lower side on the platen. From SX = (PX−DX · MX) / 2 + (DX−XLi) × MX, since CX = DX · MX, SX = (PX + CX) / 2−XLi · MX, which is (SP330).

Further, in Type 3, SX = (PX−CX) / 2 because the upper side of the original having the maximum main scanning length and the original table are aligned (SP331).
The above-described movement processing circuit is controlled in accordance with the image movement amount SX of the main scanning for the i-th document obtained as described above.

When the optical system reaches the rear end YEi of the i-th document (SP32
4) The output of the image is inhibited by the trimming circuit (SP325), and the counter i is incremented by 1 (SP32).
7) Then wait for the coordinates of the leading edge of the document.

After repeating the above operation up to the Nth original (SP32
6) Turn off the lamp, return the optical system to the home position, and end the copy processing (SP328).

As described above, the main scanning movement amount is controlled for each of a plurality of originals, so that an appropriately arranged plurality of originals can be copied beautifully.

FIG. 15 shows and explains the concept of the example of the third editing process.

In the third editing example, the three originals OG1 to OG3 appropriately placed on the glass 3 as shown in (A) are filled with a gap between the originals as shown in (B-4) and the main scanning is performed. The positions are also aligned.

In this case, the optical system performs a scan operation as shown in (B-1). That is, first, the scan CPS for detecting the document coordinates is performed on the entire document table, and then the home position is returned. After the preliminary forward PFW, the scan CPS of the first document is performed (B-2). Once the copy output is obtained, the scan CPS of the second original is performed and (B
A copy output as shown in -3) is obtained, and a scan CPS of the third document is further performed to obtain a final copy output (B-4).

 Note that STP indicates that the scan has stopped.

In the third editing example, multiple original images need to be multiplex-printed on one sheet. That is, FIG. 15 (B-2),
A mechanism for temporarily storing the copy output of (B-3) is required.

Although many such mechanisms have already been commercialized, two of them are shown and described in FIGS. 16 (A) and 16 (B).

In FIG. 16, a charger, a static eliminator, an exposure lamp, and the like necessary for the electrophotographic process are omitted.

FIG. 16A has a transfer drum as a storage unit.

The paper fed from the cassette 15 passes through the conveyor belt 30 and is attracted to the transfer drum 32, and then the image developed by the developing device 14 on the photosensitive drum 8 is transferred to the paper.

After the transfer, the sheet is developed by a required number of times while being wound on the transfer drum 32, and then is fixed by the fixing device 22 through the transport belt 31 before being discharged.

FIG. 16B has an intermediate tray 36 as a storage unit.

The paper fed from cassette 15 transfers the first image,
The image is fixed by the fixing unit 22, and thereafter, the sheet is not ejected immediately and is guided.
33 is temporarily stored in the intermediate tray 36 through the transport route 34 by selecting the direction B, is sent out to the transport route 37 by the registration rollers 40 of the intermediate tray, and is again returned to the second route on the photoconductor by the guide 38. The image is transferred.

After the above operation is repeated the required number of times (for the number of originals on the original glass 3), the paper is discharged by the guide 33 via the transport route 35. In this way, multiple scan images can be multiplex-copied on one sheet as shown in FIG. 15 (B-2 to 4).

FIGS. 17A and 17B show a control flowchart of the third editing process, which will be described.

First, the number of originals on the platen glass and the position coordinates of each original are detected by the above-described procedure (SP401 to SP404), and the size of each original is determined.
Find XLi and YLi (SP405).

In the third editing example, the document interval is reduced, so that the sub-scanning length DY of the document assuming one document is the sum of YL _O to YL _N , and the main scanning length DX is the maximum length of XLi. (SP406).

Next, taking into account the auto paper selection and the auto scaling mode, the magnifications MX and MY, the paper sizes PX and PY, and the output sizes CX and CY are obtained (SP407 to SP417), and the sub-scan margin SY for the first original document is obtained.
Is set (SP418).

The document counter i is cleared to 0 (SP419), and the optical system is started (SP420). When the optical system reaches the i-th document leading end YSi (SP421), the optical system is temporarily stopped (SP422), and a signal corresponding to the leading end of the sheet is waited for (SP42).
3).

When the leading edge of the sheet is detected, it waits for the time or the elapse of the sub-scan margin SY (SP424), then the lamp 2 is turned on to start the optical system (SP425), and the image output sections XSi and XEi corresponding to the document area. Then, the trimming circuit is controlled (SP426), and the main scanning margin SX for the i-th document is obtained in the same manner as in the second editing example, and the moving circuit is controlled (SP427).

The i-th original is copied as described above,
When the optical system reaches the rear end YEi of the document (SP428), the image output is prohibited (SP429). The lamp 2 is turned off, and the optical system is stopped (SP430).

Next, the document number counter i is incremented (SP43
2) Update the sub-scan margin SY for the next original (SP43
3) The optical system is again moved to the front end of the next original document in advance (SP420 to SP422), and the next paper front end is awaited.

As described above, the multiplex copy is repeated N times the number of documents (SP431), and the copy ends.

As described above, a useful function can be provided by combining the means for detecting the number of sheets of a plurality of documents on the platen glass and the respective position coordinates with the mechanism for multiplex copying.

In the third editing example, all the originals are processed at the same magnification, but by changing the magnification for each original, the processing shown in FIG. 18 is also possible.

That is, originals having different sizes are scaled and copied to an area of the same size on paper, and the copy method is easily performed by slightly changing the contents described above.

〔The invention's effect〕

As described above, according to the present invention, it is possible to extract image signals corresponding to each of a plurality of documents placed on a document table with a gap without performing a troublesome position designation. It is possible to satisfactorily execute different image processing on image signals corresponding to each of the originals.

[Brief description of the drawings]

FIG. 1 is a block diagram of a copying apparatus to which the present invention is applied, FIG. 2 is a block diagram showing a circuit configuration of the copying apparatus, FIG. 3 is a block diagram showing a main part of an image processing unit, and FIG. 5 and 6 are diagrams showing a procedure of moving an image, FIG. 7 is a block diagram of a coordinate detecting unit, and FIGS. 8 and 9 are diagrams showing a document coordinate and sheet number detecting operation. 10, FIG. 10 is a flowchart showing a procedure for detecting document coordinates and the number of sheets, FIG. 11, FIG. 13, FIG. 15, and FIG. 18 are views showing an example of editing processing, FIG. 12, FIG. 14 and 17 are flowcharts showing the editing processing procedure, and FIG. 16 is a view showing another configuration of the copying apparatus. 2 Lamp 3 Document platen 1 CCD 307 Document position detector 308 CPU

Claims (7)

(57) [Claims] 1. A position detecting means for respectively detecting a mounting position of a plurality of documents placed on a platen on a platen with a gap, and a position detecting means for detecting the position of the plurality of documents placed on the platen. Scanning means for outputting an image signal by scanning, based on a detection output of the mounting position of the plurality of documents by the position detecting means, based on the image signal output from the scanning means, Extracting means for extracting image signals corresponding to each of the plurality of originals, and processing means for performing different image processing on the image signals corresponding to each of the plurality of originals extracted by the extracting means. Image processing device. 2. A copying apparatus according to claim 1, wherein said plurality of original images are copied onto paper based on image signals corresponding to each of said plurality of original documents, which have been subjected to different image processing by said processing means. An image processing apparatus comprising: 3. The copying machine according to claim 2, wherein
An image processing apparatus, wherein the images of the plurality of originals are respectively copied on different sheets. 4. The copying machine according to claim 2, wherein:
An image processing apparatus, wherein the images of the plurality of originals are copied on one sheet. 5. An image processing apparatus according to claim 2, further comprising a size detecting means for detecting a size of each of the plurality of originals. 6. A magnification according to claim 5, wherein a magnification for copying images of said plurality of documents is determined in accordance with a detection output of each size of said plurality of documents by said size detecting means. Image processing device. 7. The apparatus according to claim 5, wherein the size of the paper on which the images of the plurality of documents are to be copied is determined according to the detection output of the size of each of the plurality of documents by the size detecting means. Image processing device.