JPS5974774A - Image processor - Google Patents

Abstract

PURPOSE:To eliminate the use of a memory means and to reduce the cost of an image processor, by converting an original image into electric signals in real time and converting the electric signals into binary signals to process the original image. CONSTITUTION:A CCD, a clock driver of the CCD, a signal amplifier and an A/D converter are incorporated into each of CCD reading parts 601 and 601' of a reader. The picture data converted into digital signals supplied from the parts 601 and 601' are inputted to picture processing parts 602 and 602'. The parts 602 and 602' contain a sampling which samples the CCD output and controls the quantity light of a light source through a CPU614, a detecting circuit for shading quantity and a quantizing circuit respectively. The picture signals quantized at the parts 602 and 602' are supplied to picture editing parts 604 and 604' to be edited there and then synthesized at a synthesizing part 605 to be supplied to a printer. In such a constitution, the formation of binary signals is controlled by the CPU614 to form a white/black reversed image compared with the original image when necessary.

Description

[Detailed description of the invention] The present invention relates to an image processing apparatus.

Conventionally, copying machines have performed copying by directly projecting an original image onto a photoreceptor, which has resulted in various limitations.

The present invention eliminates this disadvantage and facilitates handling.

Cleaning of the Memorandum υF (no change in content) Also, instead of illuminating the original with a light source and projecting the reflected light, which forms the original image, directly onto a photoreceptor, it is projected onto a photoelectric conversion element and converts the original image into an electrical signal. I tried to get it. Then, this electrical signal is processed by circuit means and software means to continuously enlarge/reduce the document image to any desired magnification, or to detect the document size by reading the coordinates of the document placed arbitrarily. Copy by changing the size and moving the copy paper to the size specified by the operator, extracting an arbitrary area of the original image, or moving this area to another arbitrary area,
Furthermore, by combining these six functions, we can provide multifunctional image processing capabilities such as enlarging/reducing any area of a document image to any magnification and moving it to any location, and image information processed in this way. The present invention provides the ability to transmit information over long distances. Furthermore, although several image processing methods using image memory means have been proposed in the past, the present invention eliminates the need for the memory means by performing the above processing in real time while scanning an original image, and the present invention achieves a wide range of image processing methods. This means cutting costs.

1 to 1 show the external appearance of a copying apparatus according to the present invention. This apparatus is basically composed of two units. They are reader A and printer B. The reader and printer are mechanically and functionally separated so that they can be used independently. Connections are made only with electrical cables. Reader B has operation section A~
1 is attached. Details will be described later.

FIG. 2 shows a cross-sectional view of the structure of reader A and printer B. The document is placed face down on the document glass 6, and its placement reference is on the back left side when viewed from the front.The document is pressed onto the document glass by the document cover 4. The document is illuminated by a fluorescent lamp rung 2, and an optical path is formed such that the reflected light passes through mirrors 5 and 7 and a lens 6 and is focused on the surface of the CGDI. And this mirror 7 and mirror 5 are 2:
It is designed to move at a relative speed of 1. Is this optical unit DC? - Move from left to right at a constant speed while applying TPLL to Bomok. The moving speed is 180 mm/8eC on the outward path in which the document is irradiated, and 468 nuv'θec on the return path. The resolution in this sub-scanning direction is 161 ines/inm. The thickness of documents that can be processed is from A5 to A6, and the direction in which documents are placed is A5.
．． B5. A4 is placed vertically, and B4 and A3 are placed horizontally. The optical unit is returned depending on the document size by counting the signal VIDEOENABLE from the reader from the image tip sensor (described later), and when the count value corresponds to the document size is reached.

Next, regarding the main scanning direction, during main scanning, the maximum horizontal width of A4 paper is 297 mm depending on the orientation in which the document is placed. In order to resolve this at 16 pel/mm, COD
This requires 4752 (2297 x 16) bits, so this device uses a 2688-bit CCD.
Two array sensors are used and driven in parallel. Therefore, i 61ines/min, 180mm/s
From the conditions of ec, the main scanning period (accumulation time of two CCDs) M
Hz.

Next, in Figure 2, an overview of the printer placed under the reader will be explained.The image signal processed by the reader section and made bit serial is input to the laser scanning optical system unit 25 of the printer. be done. This unit is a semiconductor laser.

It consists of a collimator lens, a rotating polyhedral mirror, an Fθ lens, and a tilt correction optical system. The image signal from the reader is applied to a semiconductor laser and undergoes electrical-to-optical conversion, and the diverging laser light is converted into parallel light by a collimator lens, and is irradiated onto a polyhedral mirror rotating at high speed, thereby scanning the laser light onto the photoreceptor 8. . The rotation speed of this polyhedral mirror is 2.
It is running at 600 rpm. During scanning, the order is approximately 400, and the effective image contains 29711 images of A4 horizontal size.
It is 8. Therefore, the signal frequency applied to the semiconductor laser at this time is approximately 20111z (NRz). Laser light from this unit is incident on the photoreceptor 8 via the mirror 24.

For example, this photoreceptor 8 has three layers: a conductive layer, a photosensitive layer, and an insulating layer.
Consists of layers. Therefore, a process component is arranged thereto which makes it possible to form an image. 9 is a front static eliminator;
10 is a front static elimination lamp, 11 is a primary charger, 12 is a secondary charger, 13 is a front exposure lamp, 14 is a developer, 15 is a paper feed cassette, 1G is a paper feed roller, 17 is a paper feed guide, 1
8 is a registration roller, 19 is a transfer charger, 20 is a minute l
l1f# roller, 21 is a conveyance guide, 22 is a fixing device, 2
3 is a tray. The speed of the photoreceptor 8 and the transport system is <180x+x/see, which is the same as the forward path of the reader. Therefore,
The speed when copying by combining the reader and the printer is A.
4 will result in 30 sheets/minute. Also, the printer uses a separating belt on the front side to separate the copy paper that is in close contact with the photosensitive drum, but because of this, the image of 13 minutes is missing from the belt. If you put toner on it, it will be developed and the belt will become dirty due to the toner.
Since this will result in staining the subsequent paper, I cut the video electrical signal of the print output in advance on the reader side for this separation belt 1] minute 8 mu.
If toner adheres to the leading edge of the copy paper, it will be fixed when it is fixed.
Since toner may wrap around the fixing roller and cause a jam, the electric signal is also cut off on the reader side to prevent toner from adhering to the leading edge 2#lIw of the paper.

Next, Figures 14-1 and 14-2 show the main scanning directions of the reader and printer and the output images.

The reader goes from the back side to the front side, and the printer goes from the front side to the back side.

The copying apparatus of this example has intelligence such as image editing, but this intelligence is done on the reader side by processing the signals read by the CCD. Also, a certain number of bits (4
752), a signal at a constant speed (13,89 Mtlz) is output. The intelligence functions include the ability to enlarge/reduce images to any magnification within the range of 0.5 to 2.0 times, a specific magnification, a trimming function to extract only a specified area, and a cropped image on copy paper. There is a movement function that allows you to move it to any location. Additionally, there is a function that performs nof tone processing at 32 gradations (depending on key specification). Furthermore, it has composite functions that combine these individual intelligent functions. Specific examples of these are shown in FIG. 16, which will be described later.

ta+ indicates the editing function, (1) indicates the front surface of the document, (2) the state when the copy is completed when only trimming coordinates are specified, and (3) indicates the trimming coordinates + movement coordinates specification (however, , an error message will be displayed if the size exceeds the copy paper size), and (4) is when specifying the trimming coordinates, specifying the moving coordinates, and enlarging at an arbitrary magnification (however, if the size exceeds the copy paper size, an error will be displayed). (5) is when specifying trimming coordinates + specifying moving coordinates + reducing at an arbitrary magnification, (6) is specifying trimming coordinates + specifying AUTO (
(7) when changing the magnification from the reference position 16 according to the cassette size direction at a magnification in the range of 0, 5 → 2 times.
) indicates the state when copying is completed when the trimming coordinate specifier AUTO is specified.

Note that the trimming coordinates to be shifted to the movement coordinates are determined based on the coordinate point having the smallest value in the sub-scanning direction.

+bl indicates the relationship between the main scanning direction of the CCD and the laser, and +C1 indicates the method of specifying the trimming coordinates.

If there is one work surrounded by a straight line, the specified order is ■～■
Do as follows. This coordinate specification is performed using the numeric keypad 12a in Figure 4.
Use e.

Figure 1-2 shows a transparent holder A-2t- that can be sandwiched between the document cover 4 and the glass 3. This holder is shaped like a bag with two sides glued together to store the original. , has the same width as the surface of glass 3. On one side of the bag holder, there is a line divided into sections as shown in the figure, and around it there are 1 vertical and 1 horizontal lines.
j: The coordinates of 1 to n and 1 to m at intervals of 5 to 1011'lfL are drawn. Each coordinate point corresponds to each point on the glass 3. When the original is placed in this bag holder with its image plane facing the coordinate plane, it can be visually seen that various parts of the original's image plane are indicated by the above coordinates. Therefore, the trimming coordinates and movement coordinates shown in FIG. 3 can be input by operating the keys on the operating section A-1 while visually observing this holder. After the input, the image surface of the original is turned over and put back into the bag holder and placed on the glass surface at a predetermined position, or the original is taken out from the bag holder and placed. Also, if the coordinates are drawn in a color with a wavelength to which the CCD is not sensitive, it is possible to place the original in the bag holder at the reference position on the glass surface. The bag holder can also be constructed by pasting three sides or one side together. If it is made of a single sheet, that is, a folded sheet, it is possible to specify the coordinates even for nine thick originals.

Figure 4-1.4-2 is another specific network wiring diagram of the e-mail system between the head office building and the branch office building, in which each reader and printer are connected to a communication control unit (hereinafter referred to as C
CU) is interposed between them, and it is connected to a coaxial cable CA.
It is connected to a network with a bus structure using .

In FIG. 4-1, when a reader and a printer are normally connected in a stand-alone manner, a cable 401 is used to connect the connector JRI of the reader and the connector JP2 of the printer. In Figure 4-2, when connecting a reader and printer via a network, conventional
Connect the connection that was made from I to the printer JPI to the JC of the CCU.
It takes the form of connecting to JPI from JC1'. Although some of the signals between the CCU reader and printer are required for control, this allows the CCU to be connected as an option without making any changes to the reader or printer hardware. It is. Also, when the reader is connected to the CCU, it is necessary to send and receive communication-related commands from the operation unit to and from the CCU, so for this purpose, the connector JR2 is used.
This is provided. The operating section of each reader has keys and display functions related to communication as shown in FIG. Since this CCU is normally stored in the pedestal of the printer, it is expected that there will be a distance to the place where the communication cable, which is a network cable, is buried, so a lead-in line for that purpose will be required. That is cable 403 and its connector is JC
It is 3. Connected to the network cable is a transceiver module 404 that integrates a connector that presses onto the coaxial cable and a modulation/demodulation circuit. The basic method of this network is a token bus method in which the network control of the bus structure is performed by token passing.

Next, the functions of this example device will be explained.

In addition to a simple copying function, this device also has a variable magnification function that allows arbitrary enlargement/reduction, an editing function that extracts or deletes any part of the document, and also automatically detects the size and position of the document. It has various functions such as automatic scaling and editing. These functions for manipulating images of documents are collectively referred to as "image manipulation functions." In addition to making copies of original images scanned by a connected printer,
CCU (Communication control)
l! The document image can be sent to another printer via the communication control unit (Unit=communication control unit). Further, it is also possible to receive a document image sent from another reader to the printer at hand. This kind of function is called a "single image transfer function". Furthermore, the above-mentioned selected functions can be arbitrarily registered in six preset keys. The registered contents can be specified arbitrarily by the user, and the contents are retained even when the power is turned off.

Such functions are called "preset functions."

Furthermore, there is an automatic exposure function that removes the background of the original, and a halftone processing function that outputs images with gradations such as photographs with good reproduction.

These are collectively called image quality processing functions. Organized below,
There are five image manipulation functions:

In other words, the variable magnification function is the same magnification (100% magnification).

Fixed magnification (size specified), stepless magnification (magnification specified from 50 to
200%), and xy variable magnification (independent variable magnification in the main and sub-scanning directions). The image reversal function includes original image, negative/positive reversal image. Editing functions include no editing, white masking, and black masking. However, the latter two are automatically
Y magnification is set to auto, and other magnification functions cannot be specified.

White frame trimming, black frame trimming, and automatic document position detection are available. However, in and ζ, magnification, single image inversion, movement, and special magnification functions are linked. As a movement function, there is no movement, you can specify the destination,
There is origin movement (cornering) and centering. Special magnification functions include no special magnification specification, auto magnification, and auto XY magnification. However, the latter two cannot specify other scaling functions. The movement function and special variable magnification function are enabled only when the editing functions such as white/black frame tri-pink and automatic document position detection are specified.

Image transfer functions include local copy (normal copy), transmission (sending original images to other printers via the CCU), and receiving (sending original images from other printers via the CCU).
II received 4M).

Also, some of the preset functions include registration (stores in the preset key), readout (reads the memory contents of the preset key), and reset (returns all functions to standard mode).
There is.

Also, among the image quality processing functions is automatic exposure (AE).

There is halftone processing.

FIG. 5 is a detailed view of the operating section A-1 in FIG. 1. This operation section is divided into three main blocks. The block on the right is a general-purpose key display section 100 found in conventional copying machines.
It is. The central block is a function key/display section 300 for calling up and using a copy/transmission function that the user has created and registered as desired through a program.

The left block is a soft key display section 200 for the user to arbitrarily create copy/transfer functions. First, the general-purpose key display section 100 will be explained. Reference numeral 103 is a 7-segment LED display for displaying the desired set number of copies and the number of intermediate copies. Reference numeral 102 indicates a warning display used in a conventional copying machine, such as a jam, no toner, no paper, copy interruption, etc. Reference numeral 104 denotes a copy density switching lever and the density display obtained thereby. 105 is a document image containing only text.

One is just a photo, and the other is a mixture of 9 letters and a photo.

This is a selection indicator for section vapor. These are provided to perform image processing, which is a device that can copy the four original images in an optimized form. 106
indicates whether the selected cassette is the upper or lower cassette. Reference numeral 107 is a display device for displaying the paper size stored in the cassette of the selected cassette stage.

108 is θ~9. A group of ten life keys of C, display 10
3 and enter numerical values in the program creation process (for example, trimming coordinates, movement coordinates) on the soft key display section 200.

Used for scaling factors, destination address specification, etc.). and 10 as the confirmation key for the latter 200 key entries.
Nine entry keys are provided. 110 is an interrupt key that interrupts multi-copying and makes another multi-copy; 111 is a full-copy cancel key that cancels multi-copying of the printer or cancels reception; and 101 is a copy key that instructs the printer to start printing or starting transmission. It is. 113 is the original image switching key 105, and 112 is the cassette stage switching key. The selections 113 and 112 shift from top to bottom every time a key is turned on. The cover of this part of the function key display section 300 is structurally removable. The reason is, as mentioned above, that one of the functions created arbitrarily on the soft key display area is registered.
Since the key 302 corresponds to one key 302, it is necessary to give the function created by yourself some kind of name and write it in the key 302. Therefore, after registering the function 'Jk', the operation is to remove this cover, write a name on one of the registered keys 302, and put the cover back on. As described above, since six function keys 302 are provided, the user can register six functions. When the user creates a function on the soft key display section 200, a message asking whether or not to register it will appear on the soft key display section 202.Respond to it using the soft key 201. All six indicators 303 corresponding to six certain keys perform a blinking operation. This means that the machine is asking the operator, "Which function key do you want to register the above function to?". Therefore, if the operator presses any key at this time, The display corresponding to the key lights up, and the other displays go off.The operator then removes the cover, writes the function name on the key, and puts the cover back on.From now on, the contents registered here will be stored in memory. Since it is backed up by a battery, it will not disappear even if the power switch is turned off.Key 301 is the standard mode return key.

By the way, the display 114 lights up when the interrupt key 110 is turned on, but when it enters the external power reception mode, it blinks.
Can I receive image data from other stations? to prevent printing using the copy key 101. If you are printing a received copy, it will cost 200 yen. Data sets and registration by 300 are possible. Therefore, when the receiving copy key 101 is turned on during a receiving print cycle, the received contents (sender address, total number of received prints, received print count) are displayed on the liquid crystal display 202. This display is erased by pressing the clear key C, and the standard mode display or the data set before the copy key 1o1 is turned on is displayed.

If the cancel key 111 is turned on during multi-print reception, paper feeding is blocked, the print cycle for the paper already in the path is completed, and printing is stopped. The sending side displays a message indicating cancellation on the LCD display.

The reader unit will be explained in detail. FIG. 6-1 shows a system block diagram of the reader unit. The interface signals with this reader are shown on the right. When connecting to a printer, connect connector JR1 to connector JPI on the printer side. Set up the reader/printer,
In addition, when communicating with the outside, the signal that originally goes to the connector JPI from the JRI is transferred to the JCI of the communication control unit 1-(CCU).
JC1' of communication control unit 1-(CCU)
It is now possible to connect to JPI. Separately, JR2 and JC2tl- are connected as a protocol signal. The timing of the interface signal of JR1 is the 7th
As shown in FIG. BEAM DETECT signal BD
is used to synchronize the rotation of the scanner when a printer is connected, and corresponds to the signal at the end of each line.

VIDEO is an image signal, and 4,752 signals each having a width of 55n8 pixels per line are output.

However, one pixel is designed to have up to three values, that is, 0, 1/2 ° 1 state, and at 0, it takes 55 ns width,
1/2 is 27.5 ns in the first half and 27.5 ns in the second half
ns increases, and 1 becomes 55nsrtJH.

This signal is BEAM if a printer is connected.
It is output in synchronization with the DETECT signal, and in other cases (transmission to another, etc.), it is output in synchronization with the internal imitation signal. VIDEOENABLE is 475 if the image data is 475.
This is a period signal in which 2 bits are output. This is also BEA
It is output in synchronization with M DETECT or an internal imitation signal.

VSYNC is the output of the image leading edge detection sensor 37b and BEA
This is a signal that is output in synchronization with M DETECT or an internal condensation signal, and means that image data will be output from now on. The signal is the same as VIDEO ENABLE. The PRINTSTART signal is a paper feeding command to the printer side.

(7) PRINT The time interval between 5TART and VSYNC is determined by the control circuit (Fig. 10.13) in consideration of the variable magnification and the trimming area. PRINTEND
is a response signal from the print side, which is issued when the trailing edge of the copy paper leaves the photosensitive drum and rides on the conveyor belt, indicating that the printing operation has ended. This detects the completion of copy paper separation and is issued at sequence timing. The ABX C0NNECT signal indicates that communication interface module 40a is connected. Communication Interface Exposure Module 2>E When connected, this terminal is connected to GND within the module, thereby putting the module into communication operation state. P)
The tINTERC0NNECT signal is output when the PRINTER is connected, and this terminal is connected to GND on the printer side. This causes the printer to be activated for printing.

S, DATA, S, CLK, C8CBUSY, PSC
BUSY is a serial signal line for carrying out a protocol between the reader and the printer (exchanging information such as one signal for transmission permission between the two).

S, DATA, S, and CLK are 16-bit protocol data and a clock, and all are bidirectional lines. C8CBUSY is output when the reader side outputs data and a clock to the line, and PSCBUSY is output when the printer side outputs data and a clock to the line.

Therefore, these are lines indicating the transmission direction of S, DATA, and iS, CLK. Please refer to FIG. 8 for detailed timing.

Returning again to FIG. 6-1, the system block of the reader will be explained. COD in CCD reading section 601゜6ot
, CCD clock driver.

It has a built-in signal intensifier from the COD and an A/D converter that converts it into ~. This control signal to the COD is generated by the CCDCD control signal generation section 603603' and sent to the CCD
It is supplied to the clock driver of the CD reading section 601.6o1'. This control signal is the horizontal synchronization signal B from the printer.
It is generated in synchronization with D. CCD reading section 601. 6o
Image data converted into a 6-bit digital signal is output from r and input to image processing sections 602 and 602'. The image processing units 602 and 602' include a sampling circuit for sampling the COD output and controlling the light amount of the light source by the CPU, a circuit for detecting the amount of shading of the light source and lens, and a correction circuit for the same, and a main circuit for performing the AE function. During scanning, a peak hold circuit detects the peak value of the light amount in the scan, and the 6-bit image data after the shading correction is completed, determines the slice level based on the peak hold value or dither pattern of the previous line or the line before the previous line, and binarizes or It has a quantization circuit for ternarization. Image processing section 60
The image signal quantized at 2,602' is sent to the image editing section 60.
4°604'. This image editing department 604゜6
04' has a backup memory for two lines.

The capacity for one line is 2 of 9 pixels per line, 4752.
It has more than double the capacity. The reason for this is that when enlarging 20 (l), each pixel data is written to the memory using twice the sampling plate, so the amount of data is doubled.Also, the reason for the buffer memory for 2 lines is that the memory is This is because when the image data of the Nth line is stored in the first memory, the image of the N-1th line is read out from the second memory. There is a write address counter for writing image data into this buffer memory, a read address counter for reading it, and an address selector circuit for switching the address signals from these two counters.The counter has a preset initial value. A parallel load type is used, and the initial value is such that the CPU loads the I10 board.The CPU follows the coordinate information instructed on the operation panel, and each time the sub-scan reaches the line corresponding to the trimming coordinates, the CPU loads the I10 board. By presetting the address value corresponding to the main scanning coordinate in the counter, it is possible to edit the document information.White masking, black masking,
There is a coordinate area control counter and a gate circuit to enable white frame trimming and black frame trimming. There is a seam detection shift register for automatic CCD splicing.

The image data from the image editing section is first output from 604 and then from 604', so it is the composition section 6 that smoothly switches the data to form one serial image data.
It is 05. The recognition unit 606 is for performing pre-scanning of the document during the idle rotation period of the printer after turning on the copy button, and detecting the coordinates where the document is placed at that time.

This part includes a shift register for detecting 8 bits of continuous white image data, an I10 port, and a main/sub-scanning counter. The operation unit 607 includes a key matrix, an LED, a liquid crystal, and a liquid crystal driver. 608 is a DC motor for scanning the optical system, and 609 is its driving circuit. Reference numeral 610 is a fluorescent lamp for illuminating the document, and reference numeral 11 is its lighting circuit.

612 (c) is a photosensor that detects that the optical system unit is at the home position; 613 (c) is a photosensor that detects that the optical system unit is at the position where the leading edge of the document is irradiated. The CPU section 614 includes a CPU, ROM, and RA.
It consists of M, a battery backup circuit, a timer circuit, and a 10 interface. The CPU section 614 controls the operation section 607, performs sequence control of the reader according to operation commands from the operator, and at the same time controls the printer using commands. In addition, according to commands related to image processing from the operation unit 607, data is set in various counters in the image processing unit 602, 602' and the image editing units 604 and 604' prior to or during scanning of the original. Furthermore, CP
U controls the light amount of the fluorescent lamp lighting device 611 based on the light amount data from the image processing unit prior to scanning the document;
Preset speed data for the DC motor drive circuit 609 according to the magnification command, and image editing units 604 and 604
Collect image stitching data from ' and calculate the stitching amount.

FIG. 6-2 is a flowchart of the key control of the operation unit 607 by the CPU 614. When the power switch of the reader is turned on, the shift memory, RAM, etc., which will be described later, are first reset, and the memory of the liquid crystal display 202 is stored in the same size 2 edit. none,
Set positive, no transmission, lower cassette on the 100 side,
Set one sheet of text original. In other words, set standard mode. This is the interrupt key 110. reset gear 3
The same thing applies when 01 is turned on. Next, check the copy key 3), No (If Nl, check whether reception is received or not. 4j1)
If no, part 200,300 entry routines (5
). After setting and registering the mode and data by steps 200 and 300, it is determined whether the printer is capable of printing (6), and if possible, the process proceeds to the copy key routine. When the copy key is on, determine whether to send or not 8) If not, send a print start signal to the CCU 9) When sending, send the destination address data and data necessary for sending to the CCU Ql. When in reception mode, transmission and printing are blocked even if the copy key is turned on, but the display of mode data up to that point is saved in a certain area of the memory, and the received contents are displayed on the display 202 instead. Press the clear key to return to the original mode data display from that display.

While the copy key is not turned on, the key is 200 yen.

300, and also allows its modification. When the reception is completed, the process proceeds to the copy key routine of step 3 in Q4 to enable copying. When the cancel key 111 is turned on in step 13, the process proceeds to step 3 after a predetermined period of time and reception is canceled. Furthermore, step 1
When the clear key is turned on in step 3, the data related to the number is reset and cleared, but the mode data etc. set by the soft keys are not reset. .

Standardization is reset by key 301.

Sequence control will be explained according to FIGS. 9 and 7. As shown in Figure 9, there are three
When viewed from the front, the optical system home position sensor (signal OH
The optical system normally stops at this position. When the reader is driven, the optical system starts scanning from left to right, and the image leading edge sensor 37b is provided exactly at the reference position of the image. The control circuit is this sensor 37b
When detected, the image data signal (VIDEO, CLK')
At the same time, each main scanning cycle (347,2μS
) Data validity period (VIDEO ENABLE)
Generates a signal indicating. And the control circuit is this V I
The sensor 37b starts counting the number of DEOENABLE signals, and when the count value α corresponding to the first point, second point, and third point according to the cassette size or magnification of the printer is reached, the optical system moves forward. Turn off the drive signal,
Switch to reverse drive signal and invert. On the way back, PR
An INT 5TART sensor 37c is provided, and when the optical system activates the sensor after reversing, the control circuit judges whether or not the specified number of copies has been scanned, and if the number does not match the specified number, the printer sends the next sheet to the printer. PR for giving instructions
Generate INT 5TART signal〇T in Figure 9
It is necessary to adjust the position of the sensor 37c so that , is equal to T,.

(Magnification change) Next, how to enlarge/reduce the original image is shown in Fig. 10 1c.
I will explain based on this. The basic concept of variable magnification is to make the speed of the DC servo motor 37d variable in the sub-scanning direction. The CPU calculates the speed based on the key input magnification,
Furthermore, the PLL frequency corresponding to the speed is calculated and preset in I10 latch +1158 before scanning. During the return trip, a fixed value is set, which returns the optical system at high speed. This means that the value stored in the CPU's ROM is
This is done by presetting to 10 latches (1). Therefore, when magnifying twice, the speed at the same magnification (180 m /
see ) at a speed of A, and when shrinking to %, it moves at twice the speed. Main scanning is a method of sampling a CCD serial signal (after A/D conversion) output at a constant frequency at a clock rate corresponding to the magnification. For example, when enlarging the image twice, if you sample at a clock rate twice the CCD clock rate, data will be obtained with an increase of 1 bit per 1 bit of original information.
When reducing the size by a factor of two, sampling is performed at a clock rate of % of the CCD clock rate, thereby obtaining data in which 1 pit is thinned out for every 2 bits of original information. The CPU calculates this clock rate based on the input magnification and sets it to 50 before starting sub-scanning. As mentioned above, the COD has a 2628-bit configuration, of which there are 36 dummy bits and 2592 valid bits. The driving frequency is 7.569, and the signal line is φ
1 clock line 55. The clock for variable magnification is
V based on the same source oscillation as φ1 and the value of I10 latch (2)
The frequency oscillated by CO(9) is synchronized with PLL 48 and a variable frequency is formed. The 2592-bit analog signal output from COD is AMP42
The signal is amplified and applied to an AGC (automatic gain control circuit).

The AGC 43 detects the white level because the white level changes depending on the long-term change in the light intensity of the fluorescent lamp, the background of the document, etc., and the relative amount of change is detected by the A/D converter 44.
This is a circuit that clamps the white level so that it can be applied to the background.

The output of the AGC is then A/D converted into a binary 6-bit nova 2-rel bit. On the other hand, dither R
OM54 has an 8-pit interval in the main scanning direction and 8 pits in the sub-scanning direction.
It is set so that the same weight code (6 bits) is output at every pit interval, and 32 types of weight codes are allocated within this 8x8=64 bit matrix. Therefore, by addressing this teaser ROM 54 with a 3-bit main scanning counter 51 and a 3-bit sub-scanning counter 52, different weight codes are output. Also, there are a plurality of combinations of weight codes set in this 8×8, and it is considered that the reproducibility of the halftone image can be changed depending on the combination. The selection of this combination is performed by the I10 latch (3153), and the presetting to this latch is performed by the CPU before the start of sub-scanning. Counter 52 is driven by the BEAM D'ETECT signal.
The bit weight code and the A/D converted 6-bit code are compared by a comparator 47 to obtain a binarized image signal capable of reproducing serial halftones. Therefore, sampling at different clock rates means that the A/D conversion values are compared with weighting codes output at different clock rates. If this comparator is φ
If, after comparing at the same rate as , scaling is done by simply thinning out and inserting bits using a certain algorithm, that would be fine for a normal binary image, but for an image dithered with halftone. In this case, if the 45° dither pattern becomes a 30” or 60° pattern, it becomes step-like and smooth reproduction cannot be obtained.Therefore, in this example, the comparator rate is changed. It is now changed according to the magnification ratio.

Next is the circuit No. 45. Since the conversion time by A/D conversion differs depending on each bit, it is latched again at φ for synchronization. Also, as a matter of course, the address counter of the shift memory 57-1, 57-2 is operated by the clock φ. With the above, shift memory 57-1
．． 57-2 contains 2592 bits when the data is 1x, 1296 bits when the data is multiplied by %, and 5184 bits when the data is multiplied by 2.

The speed of the sub-scanning DC motor 37d is controlled by the CPU.The value preset in 58 is input to the VCO 59, and the resulting oscillation frequency is synchronized with the original oscillation and the PLL 60 and applied to the servo circuit 61. It is controlled by. Note that the stroke of sub-scanning when changing magnification is at the 3rd point (431
, 8m). This is convenient for specifying an area for stepless scaling.

(CCD seam correction) A method for automatically joining two CCDs (main scanning direction) will be described.

As shown in Figure 11, on the home position of the reader (optical system) (
A white plate is provided throughout the main scanning of the switch 37 & upper), and when the optical system is normally located at the home position and the light source is turned on, this white plate is irradiated and the reflected light is input to the COD. There is. Therefore, when the control circuit is at the home position, there are variations in the amount of light and two CODs.
Correct variations in sensitivity (shading correction).

Further, a thin black line B/ having a width of 2 fi and long in the sub-scanning direction is provided at the center position of this white plate. It is sufficient that this thin line has a size that is an integral multiple of quantization. Similarly, when the optical system is at the home position, the two CCs are illuminated by turning on the light source.
This thin black line appears on the bits at each end of D, so
These COD signals are input to the shift memory, and the CCD1
Lower 128 bits of system signal, upper 12 bits of CCDZ system signal
Compare 8 bits. And each of these 128 bits
Check the data to make sure that white bits appear before and after, and that the fish bits are sand inches. Then, the number of bits obtained by adding the number of lower white pits of the CCDI system and the number of upper white bits and the number of black bits of the CCDZ system is thinned out when reading from the shift memory of the CCDZ system. In the figure, the CCD arrow indicates the main scanning direction, and the sub-arrow indicates the sub-scanning direction.

The specific method is shown in Figure 2. In order to input the image signal into the shift memory, shift memory 57-1.57-2
Since static RAM is used for
゜65). Since the amount of information input to the COD differs depending on the magnification, in this example, first, the write address counter (1) of the CCD 1 system is counted up from the LSB, and the input clock φ is counted up.

Count and check at what count it stopped. This is stored in the RAM of the CPU. If the magnification was the same, it would have stopped at 2592 counts. Next, C
In order to take out the upper 8 bits of the CDI system (the first bit that appears in main scanning is the MSB) and the lower 8 bits of the CCDZ system, the confirmed value is sent to the write address counter 63 of the CCDI system. 08H (hex code 08) is set in the CCDZ system address counter to specify the down count mode. On the other hand, each CO
An 8-bit shift register is provided to which the image signal from D is input, and the drive period of this shift register is driven by the clock output from the counter (VIDEOENABLE period) from the rising edge of the VIDEOENABLE signal indicating the main scanning period of the CCD. ), the CCD1 system shift register has:
The image signal of the most significant 8 bits of the CCD1 system remains in the shift register of the CCDz system.

The values remaining in these shift registers are then read by the CPU and stored in memory. Next, in order to take out the upper 9 to 16 bits of the CCDI system and the lower 9 to 16 bits of the CCDZ system, the write address counter of the CCD1 system is set to (the confirmed value - 8), and the CCD2
10H is set in the write address counter of the system, and the subsequent reading is performed in the same manner as described above.

After repeating this operation one after another and expanding the upper 128 bits of the CCD1 system and the lower 128 bits of the CCD2 system into memory, the number of black bits, the number of lower white bits of the CCDI system, and the CCD
Calculate the number of upper white bits of the z system. Then, by thinning out the number of bits, which is the sum of the number of lower white bits of the CCDI system, the number of upper white bits of the CCDZ system, and the number of black bits, when reading from the shift memory of the CCD2 system, continuity in the main scanning direction is achieved.

Next, the operation of the shift memory after the continuity logic is established will be explained. When writing to shift memory, CCDI system and CC
The DZ system write address counter is preset with the value confirmed at which count it stopped, and the shift memory is addressed and written by down-counting. When reading from the shift memory, the first thing to consider is the reference in the main scanning direction of the original.As shown in Figure 11, the original placement reference is the black line for joining (1.5 basket width ), the reading start address of the CCD1 system shift memory is (number of lower white bits above) + (number of black bits/2) + (148,5
×16×magnification). The read start address of the CCDZ system is the value of (the above-mentioned confirmed value) - (the number of transition bits). Then, at 13.89 degrees, the read address counter (1) of the CCDI system is started by counting down using the read clock of 4752 pulses, and then
If a ripple carry appears, it is a CCDZ type lead.
The address counter (2) is operated by counting down. FIG. 13 shows a circuit diagram related to these shift memories.

The shift memory (1) is a static memory into which CCDI image data is stored.

The shift memory (2) is a static memory into which CCDZ-based image data is stored. The write address counter 63 is an address counter used when writing data to shift memories (1) and (2). Read address counter (1) is an address counter when reading data from shift memory (1), and read address counter (2) is an address counter when reading data from shift memory (2). It is. The address selector (11) is used to select either the address signal of the write address counter 63 or the address signal of the read address counter (1) to address the shift memory (1). selector(
2) is for selecting either the address signal of the write address counter 63 or the address signal of the read address counter (2) to address the shift memory (2). Shift register 74 is C
This register is used to take out the CD1 system image data in units of 8''' from the lowest position, and the shift register 76 is
This is a register for extracting image data 8 bits at a time from the highest order of the CDZ system. F/F73 is VIDEOEN
This F/F is set at the rising edge of the ABLE signal and reset at the ripple carry of the write address counter 63, and is used to control the period of input to the shift register 74.
F'/F is set at the rising edge of DEOENABLE and reset at the ripple carry of the read address counter (2), and is used to control the period of input to the shift register 76. The I10 port 72 is an Ilo for the CPU to read and check how far it has counted when the write address counter 63 is up-counted. I10 registers 66 to 69 are write/
Address counter 63, read address counter 6
These are registers for the CPU to give preset values to 4 and 65, respectively. The I10 register 68 is a write address counter 63 and a read address counter 65.
Writes the read address counter (2), which is for the CPU to specify whether to count up or down to the address selector 70 or 71. A clock or something to decide whether to run with a single clock,
When splicing, by giving a test signal, the CPU sends one line of image data from the t-C0D driver circuit to the shift memory circuit.
is for control.

Referring to this circuit diagram, the operation of extracting 128 bits of CCDI image data in 8 bits from the lowest order and 8 bits from the most significant of CCDz series image data in order to perform splicing will be described.

(2)CPU 1i First, put the write address counter 63 into up-count mode and set 0 to the CPU 10 register (1). ■One VIDEOE from the CCD driver in Figure 10 by giving one pulse as the TEST signal (corresponding to machine start) to the I10 register (4).
NABLE, φ according to the magnification, and a clock are generated, and data is given to the shift memory. ■The CPU increments the value of the write address counter 63 by 9 from the I10 port. ■ Set the write address counter 63 to down-count mode, set the read address counter (2) to down-count mode, and set the I10 register (1) to ■
Preset the value stored in , and preset 7H in the I10 register (3). (2) Give one pulse to the TEST signal and when VI DEOENABLE disappears, 8 bits of the shift registers 74 to 76 are sequentially taken into the memory and stored. ■I10 register (1) (value of ■-7H)
) and set IOH in the I10 register (2). ■
Do ■. ■In the same way, put (the value of ■ - 77I() in I10 register (1) and 7F in I10 register (2).
Set H, give TEST signal, shift register 7
4. Continue until reading 76. Details regarding the seam correction described above can be found in the specification of Japanese Patent Application No. 128073/1983 filed by the same applicant.

FIG. 15 illustrates an image editing method for changing the magnification of a trimmed image to an arbitrary magnification based on an arbitrary point. Figure A is a document surface, Figure B is an enlarged view, and Figure 0 is a shift diagram. The basic method of image editing is (2) calculating post-editing coordinate values based on the coordinate values of the trimming area, the moving coordinate values, and the magnification (Fig. A-0). (1) The CPU determines the minimum (based on the document placement standard) of the coordinate value (X) in the main scanning direction and the coordinate value (y) in the sub-scanning direction from the coordinate values of the trimming area and sets it as xo tyo. Since the coordinates are entered using the keys in interval units, and since 16 lines/tsuru, the number of lines L0 of the 'Io coordinate is (yoX16).

Also, the amount of information Io of the x0 coordinate is (xc, X16), which is O(
Figure A), ■The CPU determines the minimum value in the X and Y directions from the area coordinate values after editing and sets it as XI l 3'I (0
figure).

■Based on x0, magnification, and
Calculation) 0 This point will be explained in detail with reference to FIG. 15-1. In order to enlarge this by 2 times with shift memory (4752X2
) bits. When simply enlarged, the amount of information I in the memory becomes (x0×magnification×16) bits. Also, the address A of the shift memory according to the magnification of the xQ coordinates is (A, -I,
). Note that A is the start address of the memory and is stored in the RAM during the COD connection correction. By the way, the number of lines corresponding to the magnification of the y0 coordinate is (L0 x magnification).

Next, in order to output this enlarged image from the shift point to X, the read start address 9 of the shift memory is determined, but it is A,
+I.

becomes. Shoko is the amount of information according to the shift coordinate X, and (
XI X 16 ). By the way, the line number of the y1 coordinate is y, X16.

Next, based on ■y0, magnification, and y, print the PRINTST as described above.
Determine the generation interval from the generation of the ART (paper feed) signal to the start of the optical fund or the generation of VSYNK (L
calculation of s). That is, L+Le corresponds to it. When this difference is +L, L, X main scanning cycle (347, 2μs
) Put it out early. Also, when it is -1, the STA RT signal or VSY
Issue the NK signal later than above. ■One stroke only in the editing area
5TART BIT C0U for gating only a part of the image data in the main scanning direction to output the image
Provide NTER and ENDBIT C0UNTER.

This corresponds to 80 and 81 in FIG. 13, respectively. This is I
Preset count data for the gate via lo. The control flop 82 is set when the counter 80 counts up and is reset at 81. 15th-
The operation is shown in Figure G.

■Calculate the number of lines between changing points in the sub-scanning direction from the coordinate values and magnification of the trimming area (D, E).

Figure F). This is done by counting VIDEOENABLE in the CPU. In the figure, M is the number of lines between changing points in the sub-scanning direction, ■ is the number of bits in the main scanning direction, and N is the number of lines between changing points in the sub-scanning direction when changing magnification (N = MX magnification)
It is.

■5TA at the change point of ■ from the edited X-direction coordinate value
R, T BIT C0UNTER and END BITCO
A preset value of UNTER is calculated and set as shown in Figure 15-H.

In addition, even when outputting the entire image without cropping, this 5TART BIT C0UNTER and EN
D BIT C0UNTER is used to create a margin that is separated from the tip margin. At the time of initialization, it is the same as above, but after counting the tip margin 2w x 16 lines = 36 lines, 5TART BIT C0U is used to avoid the separation belt.
Set NTER to 7.5 dragons x 16 pits = 120 bits.

FIG. 10-1 shows the configuration of a light source for document illumination and a lens for correcting shading. Shading correction is performed in the following sequence when the optical system is at the home position for each copy. First, a fluorescent lamp is turned on to irradiate a standard white or gray plate in the main direction of Be width in FIG. 11 on the home position tHP, and the reflected light is input to the COD. At this time, the switch 701 in the circuit is set to the 1 side, and the photoelectrically converted signal from the CCD is converted into AMP and A/D. and 811
The data is sampled every 1il and stored in RAM.
702. The reason why we do this for every 8 pixels is R.
This is to reduce the memory capacity of AM. Therefore, eight adjacent pixels (including white pixels) are corrected based on the shading data of one pixel.

Next, when the optical system moves to document scanning, the switch 701 is set to the 2 side, and the A/D converted image data of the COD is sequentially multiplied by R.
When input as a dead address signal to OM703, RA
The contents of M 702 are also read out once per 8 bits of the COD signal, and are also input to the multiplication 31 ROM (703) as an address signal. Riding! 1LROM703 has I
For example, if the input value from ζAM702 is (R
In OM2O3, the content obtained by multiplying the input value from the CCD by a value of 5 is written. By this, the multiplication ROM 703
Then, the plow COD signal is corrected based on the input value from the RAM 702 and output to the comparator. Also, due to the structure, there is a black line for automatic COD connection in the center of the standard board, so when writing the shading value to RAM, the correction value for this part is written in the vicinity of it. The fluorescent light is stably dimmed by the light reflected from the standard gray plate. That is, by comparing the A/D output with a reference value and controlling the lighting cycle of the fluorescent lamp, fluctuations in the light of the fluorescent lamp can be prevented. This is done before or after the shading correction described above.

FIG. 10-2 shows a binarization circuit. Latch (1) 801
and the output from the dither ROM 704 are switched by a selector 803, but this is because when an instruction for a photo manuscript, etc. is input on the operation panel, the CPU selects the output from the dither ROM 704, and when an instruction for a text manuscript, etc. is input, the CPU selects the output from the dither ROM 704. This is to enable selection of the output of the latch (11801) when the output of the latch (11801) is selected. When the instruction from the operation unit is for a text document, etc. The plow slice level is determined based on the peak hold value of the previous main scanning line (Fig. 10-3) and the value of the operation unit density lever 104 (Fig. 5) and is set to latch (1) 801. This causes background removal. (AE) is performed.If the instruction from the operation unit is for a photo original, etc., the CPU selects the selector 803 from the dither ROM 70.
Make it 4. At this time, the CPU selects the dither type from 0 to F based on the value of the operating lever 104 by setting it to launch (21804).

This differs in the level of dither elements and their arrangement.

Also, as mentioned above, the CPU calculates the COD connection amount and connects the image data before scanning the original, but since the dither pattern also needs to be connected on the left and right sides, the CPU sets the pre-calculated connection i to latch +31807. The value of the main scanning counter (11806) is offset by that amount.Counter (1) 805 is a 3-bit counter driven by the main scanning clock, and counter (2) 806 is driven by the sub-scanning clock, for example, the VIDEO ENABLE signal. The dither pattern is a 3-bit counter with a maximum size of 8×8.

It is also possible to use the dither ROM as a RAM and set the matrix elements of the RAM according to the inputs from 0 to F by the CPU.

Figure 10-3 shows the circuit for AE. About removing the background of the manuscript. The peak value of the image signal from the COD is detected for each main scanning line. In other words, since the background of a document should have the largest amount of reflected light when the document is irradiated, the peak value of the CCD output is detected for each main scanning line (1/16 m pitch) and the midpoint between the peak value and the minimum value is detected. However, if you set the slice level f:, you can always remove the background.

And when to set this slice level,
Since it is not known that peak value detection is complete until the main scan ends, the slice level of the current line, which is basically based on the peak value of the previous line, is set after the main scan of the previous line is completed. Become. There is no effect on the image.

According to FIG. 10-3, the first pixel image data subjected to shading correction from the multiplication ROM 703 is latched in a latch 904. After latching, the latch data and the image data of the second pixel are compared by the comparator 705, and if the data of the second pixel is υ larger than the data of the first pixel, BO) A<
B is output and set in the lunch 904, otherwise the first pixel data remains in the latch 904 as it is.

If the same method is continued until the end of the main scan, the maximum value will remain in the latch 904. This data is read via the I10 port 906 every time the main scan ends. After this CP
U immediately determines the slice level and sets it to latch +11801 in Figure 10-2.

FIG. 17-1 shows a state in which an original 300 is placed on the printer AL:D original platen glass 3. Basically, the placement position is fixed as described above, but it can also be placed diagonally as shown in the figure. In this case, the coordinates (X,
, L ) t(Xt > Yt) , (XS , Y++
), (XttYa) f During the pre-rotation period of the printer, the optical system is pre-scanned and detected. This allows the size and position of the document to be determined. This allows you to determine the scanner scan stroke during multi-copying and to select the desired cassette. Place the document cover 4 so that the image data outside the area where the document is placed will always be black data.
(Fig. 2) has been mirror-finished.

The sub-scan is the main scan to cover the entire glass surface.

Sub-scanning is performed, followed by scanning for printing. This sub-scanning speed is faster than that during printing.

The circuit diagram in FIG. 17-2 shows the logic for detecting the coordinates. The image data VIDEO that has been binarized by the previous scan is input to the shift register 301 in units of 8 bits. 8
When the bit input is completed, the gate circuit 302 checks whether all of the 8-bit data is a white image, and
If s, output 1 to signal line 3. After starting scanning the original, the first 8-bit white appears and the dead F/F 304 is set. This F/F is reset in advance by VSYNC (image tip (M number). After that, the next VSYNC
Leave it set until it arrives. When the F/F 304 is set, the value of the main scanning counter 351 (main scanning counter 51 in FIG. 10 or a dedicated counter) at the time is loaded into the latch F/F 305. This becomes the X coordinate value.

Also, the sub-scanning counter 350 (first
The value of the sub-scanning counter 52 or a dedicated counter in Figure 0 is loaded. This becomes the Y coordinate value. Therefore, Ps (
Xt, Y+) can be found.

Also, each time 1 is output to the signal 303, the value from the main scanning is loaded into the latch 307. This value is immediately stored in clutch 308 (until the next 8 bits enter shift register 301). When the value from the main scan when the first 8 bits of white appear is loaded into latch 308, 310
(This is set to 0'' at the time of VSYNC) and is compared in size by a comparator 309.

If the data in latch 308 is larger, then latch 308
The data of the latch 307, that is, the data of the latch 310
loaded into. At this time, the value of the sub-scanning counter is loaded into the latch 311. This operation is processed until the next 8 bits enter shift register 301. If the data of the latch 308 and the latte 310 are applied to the entire image area in this way, the maximum value in the X direction of the document area remains in the latch 310, and the coordinate in the Y direction at this time remains in the latch 311. This is P.

(X7. Right) coordinates.

F/II' 312 is an F/F horizontal synchronization signal that is set when the first 8 bits of white appear on each main scanning line. Hold until H8YNC.

When the F/F 312 is set, the value of the main scanning counter is set in the latch 313, and is loaded into the latch 314 until the next H8YNC. Then, the latch 315 and the comparator 316 compare the magnitude. The maximum value in the X direction is preset in the latte 315 at the time when VSYNC occurs.

If the data in latch 315 is greater than the data in latch 314, signal 317 becomes active and the data in latch 314 or latch 313 is loaded into latch 315. This operation is performed between H8YNC and H8YNC. If the above comparison operation is performed for the entire image area, the minimum value of the document coordinates in the X direction remains in the latch 315. This is X. Also, the signal line 317
When outputs, the value from sub-scan is loaded into latch 318. This becomes Y.

Latches 319 and 320 are loaded with the main scanning counter value and sub-scanning counter value at that time every time 8-bit white appears in the entire image area.

Therefore, when the document pre-scanning is completed, the count value at the time when 8-bit white appears last remains on the counter. This is (x, , y, ) O or more 8 latches (6, 11, 20, 18° 5.10
, 15.19) are connected to the pass line BUS of the CPU in FIG. 6, and the CPU reads this data at the end of the previous scan. And among these data,X,,X,.

The areas Yl and Y4 are determined as document areas, and the above-mentioned trimming process is performed when scanning the document for printing. That is, Xt + x of the coordinate component of the original,
ty, ly, dotted line, document position P, ~
The coordinates of the rectangle surrounding P can be recognized, and it can therefore be seen that at least a sheet of a size corresponding to it is required.

Therefore, as a first example, the cassette size data from the printer is compared with the original size data, and the cassette that is closer to the original size is selected. It is a CP as shown in Figure 17-3.
According to 70- of u.

Step l to calculate the distance Δγ between the coordinates Y and Yl.
), compare whether it is smaller than the A4 size cassette (step 2), if it is smaller, output A4C data to the printer to select the A4 cassette (step 3), if it is larger and smaller than the B4 size. B4 if small
All cassettes are selected, and if the size is larger than B4, an A3 cassette is selected (steps 4 and 5).

The EPU on the printer side compares each size signal with the size signals already obtained from the two cassettes according to these data (via the S and DATA lines), and if there is a corresponding size signal, controls the paper to be fed from the corresponding cassette. However, if it is not present, data to that effect is sent back to the reader side to issue a warning. The reader will display that fact. On the printer side, paper feeding control of the registration rollers 18 is performed so that the leading edge of the paper and the coordinate Y are synchronized. In standard mode, the signal VSYN from the reader
C (synchronized with the above-mentioned image tip sensor 37b) to register the registration row 21.
8 is activated, but in this case, as in the case of the trimming shift described above, a time corresponding to Y is provided between this signal and the signal from the image tip sensor 37b. Furthermore, since each cassette is loaded with reference to the position corresponding to the standard position SP side of the reader, the image output is shifted by Xl in the main scanning direction. This is done by presetting the read address counter as in the trimming shift described above. The above control mode is selected by the shift key corresponding to the display set by the above-mentioned setter key, but it can also be achieved by providing a dedicated key and inputting it.

As a second example, by inputting the above-mentioned auto command, it is possible to print this portion while changing the size to fit the sheet in the cassette. This means that the printer's selected cassette size signal is S, DA.
Since the signal is sent to the reader via the TA line, the desired copy can be obtained by sequentially performing trimming, shifting, and scaling according to the procedure described above in FIG. 16 using this signal. That is, Auto 1 is the size Px of the cassette sheet in the X direction and the Y direction as shown in FIG. 17-4.

Size ΔX of the document in the X direction and Y direction with respect to Py.

Find each ratio mx t my 'e of Δy. Then, use the smaller ratio as the common magnification for X and Y and RA
Set it to M and perform the magnification change procedure described above.

Therefore, a copy with automatic scaling based on one direction of the sheet can be obtained. As shown in FIG. 17-5, Auto 2 calculates the ratios of the document in the X and Y directions to the X and Y directions of the sheet, and independently sets the magnification in the X direction and the magnification in the Y direction. Therefore, the original image can be copied to fill the entire sheet. Auto 1 and 2 can be similarly executed in auto magnification by specifying trimming coordinates.

As a third example, a document skew warning can be issued. That is, the 17th-
As shown in Figure 6, < P+ −P4 x, , x, is X,
It is determined whether , However, printing operations are possible. The above flowchart is a program code processed by the CPU of the reader. Fig. 15-L shows a flowchart of the above-mentioned trimming, scaling, and shifting procedures. (Only if there is a shift)
:I:0* The treatment was first performed for the yO point (Fig. 15-J), but if there is no shift (movement), the cylinder 15- is sequentially moved from JC6', y6' to r5.
By controlling the start bit counter and end dot counter shown in FIG. 16 using y5, the area outside the trimming can be made white. In this case, the area that can be trimmed is one area surrounded by straight lines, so the MAX is 03 divisions, which is done by specifying two diagonal points in xy coordinates to specify the area to be divided into rectangles in the y-axis direction. . Unit is mm
Enter.

In other words, (-To5o +"lyl) +("23/2
1xsy3) + ("4y4+"5y5) is performed sequentially. When this is set to Mayaru/Futo or Auto, the VIDEO output is controlled by coordinate conversion as described above.

Figure 74-7 Kuko Vice (Te-maeken) END 81'r labor --
--One Noda 11! n7σ-rimariki
--1--1st figure-L
No. 15-J Square (4) Figure (b) St' (C) Electrical No. 18-10 No. 18-20 Supplementary Procedure Device (Method) Commissioner of the Patent Office Kazuo Wakasugi 1 Indication of Case 1982 Patent Application No. 185286 No. 2
Name of the invention Image processing device 3, relationship with the person making the correction/111 Patent applicant Location: East S;
) 146 Tokyo University 113-ku Chokuko 3-30-2 Canono Co., Ltd. (Telephone 758-2111) February 2, 1982
21.1 (4-dimensional) 6th amendment to the specification and drawings Pages 6 to 49 of the description of contents of the 7th amendment and engraving of the drawings (no change in content)

Claims (3)

[Claims] (1) Optically convert the original image and form a binary signal to start sequential printing or transmission before the original reading is completed, and control the formation of the binary signal so that a black and white inverted image of the original image can be formed. An image processing device characterized by: (2) An image processing device that photoelectrically converts an original image and automatically sets the movement coordinates of the image so as to print approximately at the center of the sheet. (3) An image processing device that inputs or detects the size of an original image in order to photoelectrically convert the original image to form a binary signal and print images at different positions on a platen surface on a plurality of sheets.