JPS5972856A - Image processor - Google Patents

Abstract

PURPOSE:To secure the multi-function picture processing capability such as the shift, enlargement/contraction, etc. of a picture or a transmitting function of the picture, by converting the reflected light of an original into an electric signal, and processing the electric signal by means of a soft means. CONSTITUTION:The signals are amplified at CCD reading parts 601 and 601' with A/D conversion and then supplied to picture processing parts 602 and 602'. The CCD output is sampled and supplied to picture editing parts 604 and 604' to be stored in a memory equivalent to 2 lines. A CPU614 performs editing by presetting the address value corresponding to the main scan coordinates at a counter in the picture editing part every time the secondary scan reaches a line corresponding to the trimming coordinates and based on the coordinate information indicated at an operation part. A synthesizing part 605 switches the outputs of the parts 604 and 604' to turn them into a piece of serial picture data. For connection to a printer, a JR1 is connected to a JP1, and the communication is executed to outside via a communication control unit CCU.

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.

Further, the original is irradiated with a light source, and the reflected light that forms the original image is not directly projected onto a photoreceptor, but is projected onto a photoelectric conversion element to obtain the original image as an electrical signal. Then, this electrical signal is processed by circuit means and software means to continuously enlarge/reduce the original image to any desired magnification, extract an arbitrary area of the original image, or separate this area. Multi-functional image processing such as moving to any area of the document image, or by combining these six functions, enlarging/reducing any area of the document image to any magnification and moving it to any location. The present invention provides the ability to transmit image information so processed 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 This means that they are cutting costs.

FIG. 1-1 shows the external appearance of a copying apparatus according to the present invention. This device basically consists of two units. They are reader A and printer B. The printer and the printer are mechanically and functionally separated so that they can be used independently. Connections are made only with electrical cables. The reader 13K is equipped with operation sections A and -1. Details will be described later.

FIG. 2 shows a cross-sectional view of the structure of reader A and printer B. The original is placed face down on the original glass filter, and its placement reference point is on the back left side when viewed from the front. The original is pressed onto the original glass by the original cover 4. The document is illuminated by a fluorescent lamp 2, and an optical path is formed such that the reflected light is focused on the surface of the CCD 1 via mirrors 5 and 7 and a lens 6. And this mirror 7 and mirror 5 are 2:
This optical unit is designed to move at a relative speed of 1. This optical unit moves from left to right at a constant speed while applying P and 1□ by the I)C servo motor. The moving speed is 100 seconds on the outward path in which documents are irradiated, and 468 mm and 1 second on the return path. The resolution in this sub-scanning direction is 16 Aines/mm. The size of documents that can be processed is from A5 to A3, and the direction in which documents are placed is A5.
, B5, A4 is placed vertically, B4. A3 is placed horizontally. There are six return positions for the optical unit depending on the document size. The first point is A5. B5. The second point is at 220 mm from the document reference position for A4, the second point is at the same <364 mm for B4, and the sixth point is at the same <431.8 mm for A6.

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. And this is 16 peA! /mm to resolve
Since 4752 (2297 x 16) bits are required for the CCD, this device uses a 2628-bit CCD.
Two D array sensors were used and driven in parallel.

Follow, 161ines/min.

Based on the condition of 180 mm/sec, the main scanning period (
2 CCD becomes 7.569#Hz.

Next, referring to FIG. 2, an overview of the printer placed below the reader will be described. The image signal processed by the reader section and made into bit serial is input to the laser scanning optical system unit 25 of the printer. 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 number of pixels is approximately 400, and the effective image is 297, which is A4 horizontal size. Therefore, the signal frequency applied to the semiconductor laser at this time is about 20 Mllz (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, process components are arranged thereto which make 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, 16 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 separation roller, 21 is a conveyance guide, 22 is a fixing device, and 23 is a tray. The speed of the photoreceptor 8 and the transport system is <180 mm/see, which is the same as the forward path of the reader. Therefore, the speed of copying using a combination of a reader and a printer is 30 A4 sheets/minute. Further, printers use 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 the belt is missing. If the signal is added, the toner will be used for development, and the resulting toner will stain the belt and stain subsequent sheets of paper. The length of the belt is 8mm, so that the video electrical signal for print output is cut off. Also, if toner adheres to the leading edge of the copy paper, it will wrap around the fixing roller when it is fixed and cause a jam, so the electrical signal should also be cut on the reader side to prevent toner from adhering to the leading edge of the paper by 2 mm. ing.

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 device in 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, and in any case at the output stage from the leak. Also, a certain number of bits (4
752), a signal at a constant speed (13,89 MIIz) 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 to perform halftone processing in 32 gradations by specifying a key. Furthermore, it has a composite function that combines these individual intelligent functions. Specific examples of these are shown in FIG. 16, which will be described later.

lal indicates the editing function, (1) indicates the front surface of the document, (2) indicates the state when copying is completed when only trimming coordinates are specified, and (3) indicates trimming coordinates + movement coordinates (however, , an error will be displayed if the copy paper size is exceeded), and (4) is when specifying the trimming coordinates + specifying the movement coordinates + enlarging at an arbitrary magnification (however, an error will be displayed if the copy paper size is exceeded). (5) is when specifying trimming coordinates + specifying moving coordinates + reducing at an arbitrary magnification, and (6) is when specifying trimming coordinates + specifying AUTO (
(7) when changing the magnification from the reference position 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 trimming coordinates are specified + 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.

fbl shows the relationship between the main scanning direction of the CCD and the laser, and (C) shows the method of specifying trimming coordinates.

If it 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.
Do this using

Figure 1-2 shows a transparent holder A-2 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 originals. It 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 the line there is a line divided into 1 or 5 sections vertically and horizontally.
The coordinates of 1 to n and 1 to m at intervals of ~10 ho are drawn.

Each coordinate point corresponds to each point on the glass 3. Therefore, if you insert the original into this bag with the original image plane facing the coordinate plane, you can visually see that various parts of the original image plane are indicated by the above coordinates. Therefore, while visually checking this holder, adjust the trimming coordinates and moving coordinates in Fig. 3 using the operating section A-1.
You can input by operating the keys. After inputting, the original image surface is turned over and placed in the bag holder again 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 the sheet is constructed with one side pasted together and the toe folded into nine, coordinates can be specified even for two 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, the conventional reader JR
Connect the connection that was made from I to the printer JPI to the JC of the CCU.
1 and connects to JPI from JC]'. This is because the CCU can be connected as an option without changing the reader or printer hardware, even though the CCU requires some of the signals between the reader and printer for control. be. Also, the reader has CCU
When connected to the CCU, it is necessary to send and receive communication-related commands from the operation unit to and from the CCU.
R2 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 JC3. 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 scaling, an editing function that allows you to extract or delete any part of a document, and a function that automatically adjusts the size and position of the document. It has various functions such as detecting the image and automatically changing the size 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 read by a connected printer, the CCU (Communication Control
The original image can be sent to other printers via the olUnit (Communication Control Unit). Further, it is also possible to receive a document image sent from another reader to the printer at hand. Such a function is called an "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 a function is called a "preset function."

Furthermore, there is an automatic exposure function that removes the background of the original, and a halftone processing function that outputs images with gradation, such as negative images, 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 zesking. 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, here, the magnification, two-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 scaling function are enabled only when the editing functions such as white/black frame trimming 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 (receiving original images from other readers via the CCU). .

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. 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 create copy/transfer functions as desired. 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 papers. These are provided to perform image processing such as a device that can copy four types of 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 O~9. A group of ten 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. Reference numeral 110 indicates an interrupt key for interrupting multi-copy and making another multi-copy; 111 indicates a copy cancel key for discontinuing multi-copy by the printer or canceling reception; and 101 indicates a copy cancel key for instructing the printer to start printing or starting transmission. This is the key. 113 is a document image switching key of 105, and 112 is a cassette stage switching key. 113 and 112 shift the selection from "2" to "down" each time the key is turned on. The cover of this part of the function key display section 300 is structurally removable. The reason is that, as mentioned above, one of the functions created arbitrarily on the soft key display area is registered and corresponds to one key 302, so you can give the function you created some name and press key 302. It is necessary to write it in. Therefore, after registering a function, the user takes off the cover, writes a name on one of the registered keys 302, and puts 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. If the user responds with the soft key 201, the function will be displayed on the function display section 300. 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 a standard mode return key.

By the way, the display 114 lights up when the interrupt key 110 is turned on, but on the other hand, when it enters the reception mode, it blinks.
It notifies reception of image data from another station and prevents printing using the copy key 101. Data can be set and registered using the Ki fFt5200 and 300 during reception printing. Therefore, when the receiving copy key 101 is turned on after the received print is completed, the received contents (sender address, total number of received prints, received print count) are displayed on the liquid crystal display 202. This display is cleared by the clear key C, and the standard mode display or the data set before the copy key 101 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 the system block Fl of the reader unit. The interface signals with this reader are shown on the right. When connecting to a printer, connect connector JRI to connector JPI on the printer side. When setting up a reader/printer and communicating with the outside, the signal that originally goes from JRI to connector JPI is input once into the JCI of the communication control unit (CCU), and the signal sent from JC1' to J of the communication control unit (CCU) is
It looks like it's connecting to PI. Separately, JR2 and JC2 are connected as protocol signals. JRI
The timing of the interface signals is shown in FIGS. 7 and 8. The BEAM DETECT signal BD is used to synchronize the rotation of the scanner when a printer is connected, and corresponds to the tip signal of each line.

VIDEO is an image signal, and 4752 signals are output per line with a width of 55 ns per pixel.

However, one pixel has up to three values, that is, 0, 1/2°1, so at 0, it takes 55 ns,
1/2 is 27.5 ns in the first half and 27.5 ns in the second half
ns length, 1 becomes 55 n8 width H.

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 an internal pseudo 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
Output in synchronization with M DETECT or internal pseudo 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 pseudo signal, and means that image data will be output from now on. Signal rlJ is VIDEO ENABLE
is the same as The PRINTSTART signal is a paper feeding command to the printer side.

(7) The time interval between PRINT 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. When a communication interface module is connected, this terminal is connected to GND within the module, thereby enabling communication. PRINT
The ERC0NNECT signal is output when the PRINTER is connected, and this terminal is connected to GND on the printer side.
It is connected to. This causes the printer to be activated for printing.

S, DATA, S, CLK, C8CBUSY, PSC
BUSY is a serial signal line used for protocol (exchange of information such as two signals allowed for transmission between the reader and the printer) between the reader and the printer.

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 lines indicate the transmission direction of S, DATA and S, CLK. Please refer to FIG. 8 for detailed timing.

Returning again to FIG. 6-1, the system block of the reader will be explained. The CCD reading section 601゜601' contains CO.
D. CCD clock driver.

It has a built-in signal amplifier from the CCD and an A/D converter that converts the signal into multiples. This control signal to the CCD is generated by the CCDCD control signal generation section 603603' and sent to the CCD.
The signal is supplied to the clock driver of the CD reading section 601, 601'. This control signal is the horizontal synchronization signal B from the printer.
It is generated in synchronization with D. CCD reading section 601, 601
Image data converted into a 6-bit digital signal is output from ' and input to image processing units 602 and 602'. The image processing units 602 and 602' include a sampling circuit for sampling the CCD output and controlling the light intensity of the light source by the CPU, a circuit for detecting the amount of shading of the light source and the lens, and a correction circuit therefor, and a main circuit for performing the AE function. A peak hold circuit detects the peak value of the light amount during scanning, and the 6-bit image data after the shading correction is completed, determines the kiss 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 unit 602
, 602', the image signal is sent to the image editing section 604.
It is input at ゜604'. This image editing department 604゜60
4' has a buffer memory for two lines.

The capacity for one line is 2 of the number of pixels per line, 4752.
It has more than double the capacity. The reason for this is that when enlarging by 200%, each pixel data is written into the memory using twice as many sampling plates, so the amount of data is doubled. Also, the reason for the buffer memory for two lines is that the memory cannot perform writing and reading at the same time, so when the Nth line of image data is being written to the first memory, the N-1 line from the second memory is being written. This is to read out the image of the eyes. In addition, this part includes a write address counter for writing image data into this buffer memory, a read address counter for reading image data, and an address selector circuit for switching address signals from these two counters. The counter uses a parallel load type in which an initial value can be preset, and the initial value is loaded by the CPU into the I10 port. The CPU presets the counter with an address value corresponding to the main scanning coordinates each time the sub-scanning reaches a line corresponding to the trimming coordinates in accordance with the coordinate information instructed by the operation unit, thereby making it 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, 10 ports, and main/sub-scanning counters. 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. 610 is a fluorescent lamp for illuminating the document, and 611 is its lighting circuit.

A photo sensor 612 detects that the optical system unit is at the home position, and a photo sensor 13 detects that the optical system unit is at a position to irradiate the leading edge of the document. The CPU section 614 includes a CPU, ROM, RAM,
It consists of a battery backup circuit, a timer circuit, and an I10 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 section 607, data is set in various counters in the image processing section 602, 602', image editing section 604, 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 2 is the interrupt, insert, and key 11o, and the reset key.
The same thing applies when 301 is turned on. Next, check the copy key 3), No (when it is Nl, check whether reception is received or not 4)
, when no, some 200,300 entry routines (
Proceed to 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 routine proceeds to the copy key. When the copy key is on, determine whether or not to send. 8) If not, output a print start signal to the CCU. 9) When sending, send the destination address data and other data necessary for transmission to the CCU. @o When the receive mode is entered, sending and printing will be blocked even if the copy key is turned on, but the display of mode data up to that point will be saved to an area with memory,
Instead, the received content is displayed on the display 202 α1). Use the clear key to return to the original mode data display α2
While the ゜copy key is not turned on, it is possible to make entries using keys 200゜300, and it is also possible to change them (13). When the reception is completed, station 0 proceeds to the copy key routine of step 3 to enable copying. Step 13
When the cancel key 111 is turned on during the process, the process proceeds to step 3 after a predetermined period of time and reception is canceled. Note that when the clear key is turned on in step 13, 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
position sensors 37a to 37c. The optical home position sensor (signal OHP
output), and 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. When the control circuit detects this sensor 37b, it outputs an image data signal (VIDEO, CLK) and also generates a signal indicating a data valid period (VIDEOENABLE) in each main scanning cycle (347, 2 μs). And the control circuit is this VIDEO
The sensor 37b starts counting the number of ENABLE signals, and calculates the number of ENABLE signals according to the cassette size or magnification of the printer.
When the count value α corresponding to the point, the second point, and the third point is reached, the optical system forward drive signal is turned off and switched to and reversed to the backward drive signal. On the way back, PRINT
A 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, it instructs the printer to feed the next sheet. PRINT to give
5TART signal is generated.

Note that it is necessary to adjust the position of the sensor 37c so that T2 in FIG. 9 is equal to T.

(Magnification Variation) Next, a method for enlarging/reducing the original image will be described based on FIG. 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, further calculates the PLL frequency corresponding to that speed, and presets it to I10 latch (1158) before scanning.On the return trip, a certain fixed value is set, Therefore, the optical system is returned at high speed.This is because the value stored in the CPU's ROM is
This is done by presetting to 0 latch (1). Therefore, when enlarging to 2 times, the speed at the same time (180y + w
/see), it moves at % speed, and when reducing to %, it moves at twice the speed. Main scanning is a C C'D serial signal (A/D
(after conversion) at a clock rate that corresponds to the magnification. For example, when enlarging by 2 times, sampling at a clock rate twice the CCD clock rate increases data by 1 bit for each bit of original information, and when reducing by %, sampling at a clock rate twice the CCD clock rate. If you sample with , you will get data with 1 bit thinned out for every 2 bits of original information.'' C
The PU calculates this clock rate based on the input multiplier,
The I10 latch f2150 is set before starting sub-scanning. As mentioned above, the CCD has a 2628-bit configuration, of which there are 36 dummy bits and 2592 valid bits. And its driving frequency is 7.569 i11! z, its signal line is φ, and the clock line 55. The clock for scaling is the same source oscillation as φ1 and the frequency oscillated by V CO (9) based on the value of I10 latch (2).
Synchronization is achieved at 48, and a variable frequency is formed as φ2. The 2592-bit analog signal output from the CCD is amplified by the AMP 42 and then passed through the AGC (automatic gain control circuit).
Can be applied to.

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 then detects the relative amount of change.
This is a circuit that clamps the white level so that it can be applied to

The output of the AGC is then A/D converted into 6-pit parallel bits which are binary. On the other hand, Dayza R
OM54 has an 8-bit interval in the main scanning direction and 8 bits in the sub-scanning direction.
It is set so that the same weighting code (6 pits) is output at bit intervals, and 32 types of weighting codes are allocated within this 8×8=64 bit matrix. Therefore, by addressing this dither ROM 54 using a 3-bit main scanning counter 51 and a 3-bit sub-scanning counter 52, different weight codes are output. Moreover, 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 latch I10 (3!53), and presetting to this latch is performed by the CPU before starting sub-scanning. This main-scanning counter 51 is driven by the φ2 clock whose frequency is variable depending on the magnification.
The sub-scanning counter 52 is driven by the BEAM DETECT signal. The 6-pit weight code from the dither ROM 54 and the A/D-converted 6-pit code are compared by a comparator 47 to obtain a binarized image signal that can reproduce a serial halftone. . 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,
After comparing at the same rate as , scaling is done by simply thinning out and inserting bits using a certain algorithm. This is fine for normal binary images, but for halftone and dithered images. If this is done, the 45° dither pattern becomes a 30° or 60° pattern, which becomes step-like and cannot be reproduced smoothly. Therefore, in this example, the comparator rate is changed according to the magnification ratio.

Next is 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 φ2 clock. With the above, shift memory 57-1
．． 57-2 contains 2592 bits when the data is the same size, 1296 bits when the data is multiplied by %, and 5184 bits when the data is multiplied by 2.

For the speed of the sub-scanning DC motor 37d, the value preset in the CPU I10 launch (1) 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
, 8xm). 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 across the main scanning switch (above the switch 37a), and when the optical system is normally in the ho 1 position and the light source is turned on, this white plate is irradiated and the reflected light is transmitted to the CC.
It is designed to be input to D. Therefore, when the control circuit is at the home position, there are variations in the amount of light, two C
Correct variations in OD sensitivity (shading correction). Further, a thin black line BJ having a width of 2 mtg and long in the sub-scanning direction is provided at the center 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, by turning on the light source,
This black thin line appears in the bits at the ends of each of the two CCDs, so input the signals of these CCDs to the shift memory,
The lower 128 pits of the CCDI system signal and the upper 128 pits of the CCD2 system signal are compared. and each of these 128
Make sure that the pit data always has white bits before and after it, and that black bits form a sandwich. and C
The number of bits obtained by adding the number of lower white bits of the CD1 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 CCD2 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 write the image signal to the shift memory, shift memory 57-1.57-2
Since static RAM is used for the write address counter (write address counter 63) and read address counter (read address counter 64)
゜65). The amount of information input to the CCD differs depending on the magnification ratio, so in this example, first, the write address counter (1) of the CCD 1 system is counted by the LSB and the shift count by the input clock φ2. Check to see if the count has stopped. This is stored in the RAM of the CPU. If the magnification was the same, it would have stopped at 2592 counts. Next, the upper 8 bits of the CCDI system (the first bit that appears in main scanning is the MSB) and the CCD2
In order to take out the lower 8 bits of the system, set the above-mentioned confirmed value in the write address counter 63 of the CCDI system, set osH (hex code 08) in the address counter of the CCD2 system, and start counting down. Specify the mode. On the other hand, an 8-bit shift register is provided to input image signals from each CCD, and the driving period of this shift register is set to VIDEOE, which indicates the main scanning period of the CCD.
From the rising edge of the NABLE signal, the color data (VI
It operates based on the clock output during the DEOENABLE period. ), CC
The image signal of the most significant 8 bits of the CCD1 system remains in the shift register of the D1 system, and the image signal of the least significant 8 bits remains in the shift register of the CCD2 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 CCD1 system and the lower 9 to 16 bits of the C0D2 system, the write address counter of the CCDJ system is set to (the confirmed value - 8), and the CCDz
IOH is set in the write address counter of the system, and reading is then 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 2nd system. Then, by thinning out the number of bits obtained by adding the number of lower white bits of the CCD1 system, the number of upper white bits of the CCD2 system, and the number of black bits when reading from the shift memory of the CCD2 system, splicing 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, CCD l system and C
The CDZ 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 that must be considered is the reference in the main scanning direction of the document.

As shown in FIG. 11, the document placement reference is 148.5 mm from the center of the black thin line (1.5 myi width) for splicing, so the reading start address of the shift memory of the CCD1 system is ( The value is (the above number of lower white bits) + (number of black bits/2) + (148, 5 x 16 x magnification). C.C.
The read start address of the D2 system is the value of (the above-mentioned confirmed value) - (the number of transition bits). and 13.89
At 1111z, the read clock of 4752 pulses first causes the read address counter (1) of the CCDI system
is counted down, and when it reaches 0 and a ripple carry occurs, the CCD2 system read address counter (2
) moves with a down count.

FIG. 13 shows a circuit diagram related to these shift memories.

Shift memory (11 is a static memory into which CCDI image data is stored.

The shift memo (January 2) is a static memory that stores C0D2-based image data. The write address counter 63 is an address counter used when writing data to shift memories (1) and (2). Read address counter (1) is the address counter used when reading data from shift memory +11.
Address counter (2) is an address counter when reading from shift memory (2). The address selector (1) is used to select either the address signal of the write address counter 63 or the address signal of the read address counter (11) to address the shift memory (1). The 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
The shift register 76 is a register for extracting 8 bits of CDI image data from the lowest order.
This is a register for extracting image data in units of 8 bits from the highest order of the 2nd system. F/F73 is VIDEOENAB
This F/F is set at the rising edge of the LE 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. This F/F is set by a ripple carry of the read address counter (2) and reset by a 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 indicates how far the write address counter 63 was counted when it was up-counted.
It is Ilo that U reads and confirms. The I10 registers 66 to 69 are registers used by the CPU to give preset values to the write address counter 63 and read address counters 64 and 65, respectively. The I10 register 68 is used by the CPU to specify up-count or down-count for the write address counter 63 and read address counter 65, and also serves as an address register.
The selectors 70 and 71 are for the CPU to specify which counter value to select, and the selectors 70 and 71 are for determining whether to operate the read address counter (2) using the ride clock or the read clock. t
The CPU controls so that one line of image data is provided from the COD driver circuit to the shift memory circuit by providing the est signal.

According to this circuit diagram, we will explain the operation of extracting 128 bits of CCDI system image data by 8 bits from the lowest order and 8 bits from the highest order of CCD2 system image data in order to carry out splicing according to this circuit diagram. First, the write address counter 63 is placed in up-count mode and the I10 register (1) is set to 0. ■■ By giving one pulse as the TEST signal (corresponding to machine start) of the 10 register (4), one VIDEOEN is output from the CCD driver in Figure 10.
A13LE, a φ2 clock corresponding to the magnification is generated, and data is given to the shift memory. ■The CPU takes in the value of the write address counter 63 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 ``■10'' register (3) to 7H. (2) Give one pulse to the TEST signal and when VIDEO ENABLE disappears, 8 bits of shift registers 74 to 76 are sequentially fetched into memory and stored. ■I10 register (+) (value of ■-
7H) and set IOH in the I10 register (2). Do ■■. ■In the same way, register I10 (1
1 (value of ■ - 77H) and 7 to I10 register (2).
Set FH, apply the TEST signal, and repeat until the shift registers 74 and 76 are read. 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). This is as follows: 1) The CPU determines the minimum (based on the document placement standard) of the coordinates in the main scanning direction (X) and the coordinates in the subscanning direction (y) from the coordinates of the trimming area. .

Let's say yo. Since the coordinates are entered using the keys in units of (yoX16) Totoru. Also X. Coordinate information amount I
o becomes (xoX16) (Figure A), ① The CPU determines the minimum value in the X direction and the X direction from the area coordinate values after editing and sets it as XI r y+ (Figure 0).

■Based on Xo, magnification, and xl, determine the preset value of the read start address in the read address counter read from the shift memory (address A3 in Figure
calculation). 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 in the memory (2) becomes (Xo x magnification x 16) pits. Also, the address A of the shift memory according to the magnification of the Xo coordinate is (AIII)
becomes. Note that A is the start address of the memory and is stored in the RAM when correcting the CCD connection. By the way, y. The number of lines corresponding to the coordinate magnification is (LOX magnification). Next, in order to output this enlarged image from the shift point to X, the read start address A3 of the shift memory is found, but it is A2
+I2. Note that (2) is the amount of information corresponding to the shift coordinate X, which is (x, X16). By the way, the number of lines L1 of the y1 coordinate is y, X16.

Next, based on ■Vo, magnification, and y, the above-mentioned I] RINTS
Determine the generation interval from the generation of the TART (paper feed) signal until the start of the optical system or until the generation of VSYNK (I
, 3 calculation). That is, LI L2 corresponds to it. When this difference is +L3, 5TART signal or VSYNT (signal is used as reference, L3 x main scanning cycle (347, 2μs)
) Put it out early. Also - at L3, STA RT Moon or VS
Issue the YNK signal later than above. ■ STA'RT BIT C0 to gate only part of the image data in the main scanning direction in order to output the image only to the editing area
Provide UNTER and ENDBIT C0UNTER. This corresponds to 80 and 81 in FIG. 13, respectively. This presets the count data for the gate via Ilo. Flip-flop 82 is set when counter 80 counts up and 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 by 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
RT BIT C0UNTER! : END BIT
A preset value of COUNTER is calculated and set as shown in Fig. 15-F.

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. The initialization is the same as above, but after counting the tip margin of 2mm x 16 lines = 36 lines, set 5TART BIT C0 to avoid the possibility of applying the separation belt.
Set UNTER to 7.5m@X16 bits = 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 illuminate a standard white or gray plate in the main direction of width Bj' in FIG. 11 located on the home position HP, 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 converted.

Then, the data is sampled every 8 pixels and RA
Written to M702. The reason why this is done every 8 pixels is to reduce the memory capacity of the RAM. Therefore, based on the shading data of one pixel, eight adjacent pixels (
(including white pixels).

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 an address signal to OM703, RA
The contents of M702 are also read out once for every 8 bits of the CCD signal, and similarly input to the multiplication NROM (703) as an address signal. Multiplication ROM 703 has RAM 702
If the input value from the CCD is, for example, a value of %, the content obtained by multiplying the input value from the CCD by a value of nothing is written in the ROM 703. This allows the multiplication ROM 703 to
Based on the input value from 702, the CCD signal is corrected and output to the comparator. Furthermore, due to the structure, there is a thin black line for automatic COD connection in the center of the standard plate, so when writing the shading value to the RAM, the correction value for this part is written as a value in the vicinity thereof.

Also, 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
The output from the dither ROM 704 is switched by a selector 803, but this is because when an instruction for a photographic 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 only to enable the output of latch (1) 801 to be selected when there is a problem. When the instruction from the operation section is for a text document, etc., the CPU latches the selector 803 (selects 11801) and displays the peak hold value of the previous or previous main scanning line (Fig. 1O-3) and the operation section density. Determine the slice level based on the value of the lever 104 (FIG. 5) and set it to the latch (11801. This performs background removal (AE). If the instruction from the operation unit is for a photo original, etc., the CPU selects the selector 803. dither ROM 704. At this time, the CPU selects the O-F dither type by setting it to launch (21804) based on the value of the operating lever 104.

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

Also, as mentioned above, the CPU calculates the CCD connection amount and connects the image data before scanning the document, but since the dither pattern also needs to be consecutive on the left and right sides, the CPU latches the previously calculated connection amount ( 3) 807, and the value of the main scanning counter (j) 806 is offset by that value. The counter (11805 is a 3-bit counter driven by the main scanning clock, and the counter (2) 806 is a 3-bit counter driven by the sub-scanning clock, for example, the VIDEO ENABLE signal. Therefore, the dither pattern can be a maximum of 8 x 8 matrix. It is.

It is also possible to use the dither ROM as a RAM and set the matrix elements of the RAM according to the inputs O 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 CCD is detected for each main scanning line. In other words, the background of the original should have the largest amount of reflected light when the original is irradiated, so the peak value of the COD output is detected for each main scanning line (''/'16 x m pitch) and the intermediate value between the peak value and the minimum value is detected. If you set the slice level in the area, 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.

The image data of the first pixel subjected to shading correction from the multiplication ROM 703 according to FIG. 10-3 is latched into the lunch 904. After latching, the latte data and the second pixel image data are compared by the comparator 705, and if the second pixel data is larger than the first pixel data, port A<
B is output and set to lunch 904, otherwise the first pixel data is that! , remains in the latch 904. Thereafter, if the same method is continued until the end of the main scan, the maximum value will remain in the launch 904. I10 this data
It is read through port 906 every time main scanning ends. After this C
The PU immediately determines the slice level and sets the latch (11801) in FIG. 10-2.

Figure 17-1 shows a document 3 on the document table glass 3 of sorter A.
00 is placed. 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 of four points (Xl, Y
,).

(X2, Y2), (xl, Y3), (Xl, Y
4) During the pre-rotation period of the e-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 scanning stroke during simultaneous rotation, and to select the desired cassette. The document cover 4 (FIG. 2) is mirror-finished so that image data outside the area where the document is placed is always black data.

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, which has been binarized by the previous scan, is input to the shift register 301 in units of 8 bits.

When the 8-pit input is completed, the gate circuit 302
Check if all bit data is a white image, and
If es, 1 is output to signal line 3. The F/F 304 is set when the first 8-bit white appears after scanning the original. This F/F is reset in advance by VSYNC (image leading edge signal). 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 that time is loaded into the latte 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, P+ (
X+, 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 pits enter shift register 301). When the value from the main scan when the first 8 pits 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, latch 308
That is, the data in latch 307 is stored in latch 310.
loaded into. Also, at this time, the value of the sub-scanning counter is loaded into the latte 311. This operation is processed until the next eight pits enter the shift register 301. If the data of the latte 308 and the latch 310 are applied to the entire image area in this manner, the maximum value of the document area in the X direction remains in the latch 310, and the coordinate in the Y direction at this time remains in the latch 311. This is the P2 (X2, Y2) coordinate.

F/F 312 is an F/F that is set when 8-bit white appears for the first time in each main scanning line, and it outputs horizontal synchronization signal H8.
It is reset by YNC, the first 8 bits are set to white, and are held by the next H8YNet.

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 T-I 5YNC. and latch 315
The comparator 316 compares the size of the data. latch 315
The maximum value in the X direction is preset at the time when VSYNC occurs.

If the data in latch 315 is thicker 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 Ys.

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 (X4 + Y4) 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. Of these data, X2. The area of X3°Y, , Y is determined as the original area, and the above-mentioned trimming process is performed when scanning the original for printing. That is, the coordinates of the dotted rectangle surrounding the document positions P, -P4 can be recognized by the coordinate components X2, Xs, 'Y+, and Y4 of the document, and it is therefore understood that at least a sheet of a size corresponding to the dotted line is required.

Therefore, as a first example, the cassette size data from the printer and the original size data are compared, and the cassette that is closer to the original size is selected. It is an ep like the one shown in Figure 17-3.
According to the flow of u.

Step 1: Calculate the distance Δy between the coordinates Y4 and Y.
), compare whether it is smaller than the A4 size or not (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 Case B4
If the cassette is larger than B4 size, an A3 cassette is output to be selected (steps 4 and 5).

The CPU 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
Registration roller 1 with C (synchronized with the above-mentioned image tip sensor 37b)
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 X in the main scanning direction. This is done by presetting the read address counter in the same way 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 of the cassette sheet in the X and Y directions, 7:px, as shown in FIG. 17-4.

The size Δ, r of the original in the X direction and Y direction with respect to py.

Find each ratio mx + m'/ of Δy. Then, use the smaller ratio as the common magnification for X and Y in RAM.
1 and performs the above-mentioned magnification process. Therefore, a copy with automatic magnification change based on one direction of the sheet is 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, ~X of P4, , X2 is X3.
X, is, Y, , Y3 is, Y2. It is determined whether Y and Y are equal (with a difference of several bits), and if not, a warning is displayed. 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 xo
, yo point was first treated (Figs. 15 to J), but if there was no shift (movement), sequentially in box 15- as shown in the figure, "0 + 37'0-""5 +
37s can control the start bit counter and end dot counter shown in FIG. 16 to make the area outside the trimming white. In this case, since the area that can be trimmed is one area surrounded by straight lines, the area to be divided into rectangles in the y-axis direction is specified by specifying two diagonal points using xy coordinates. The maximum is 3 divisions. Enter the unit in mm.

In other words, (xoy mouth, x1y+) + (”23/2
, xsys ) + (x4y41 "53'5"). This is the same when manual shift or auto is set, and the coordinates are converted as described above and VIDEO
Control output.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an image processing device to which the present invention can be applied, FIG. 2 is a perspective view of a document holder, FIG. 6 is a sectional view of the device shown in FIG. 1, and FIG. 1 is a block diagram of a local network connecting the devices shown in FIG. 1, FIG. 5 is a plan view of the operation unit shown in FIG. Flowchart diagram, Figure 7.8.9 is the operation time chart diagram of Figure 6, Figures 1[]-1, 10-2, 10-3, and 13 are the circuit diagrams of Figure 6, Figure 11.12 is an explanatory diagram of CCD seam correction, and Figures 14-1 and 14-2 are the main ones. Explanatory diagrams of sub-scanning, FIGS. 15-A to 15-F. Figures 15-H to 15-L are explanatory diagrams showing image conversion control, Figure 15-G is an operation time chart of Figure 16,
Fig. 16 is an example of image conversion, Fig. 17-1 is an explanatory diagram of coordinate recognition, Fig. 17-2 is a coordinate recognition circuit diagram, Fig. 17-3
17-6 are control flowcharts based on recognition. In the figure, A is the league club, and B is the printer club. Applicant: Canon Corporation; ! → Calyx; ・\1300- Fig. 74-7 Fig. 1￥B Fig. 15-e Part D Fig. 15-1 Fig. 15-F - Figure Nuda Ijay7o - store power ---
1~, 7. Twenty. - Possible'1'''Possible'' One drop °''-1π ding ding m (gu) Figure (b) S/' (C) Procedural amendment (formality) Commissioner of the Japan Patent Office Wakasugi Wainu 1 Indication of the case 1983 Patent Application No. 183200 2,
Name of the invention Image processing device 3 Relationship with the person making the amendment Patent applicant Location 3-30-2 Shimomaruko, 111-ku, University of Tokyo Name (+00) Canon Co., Ltd. 5 Date of amendment order February 22, 1982 6. Description and drawings to be amended 7. Engraving of the description and drawings of the amendment (no change in content) 309-

Claims (1)

Claims: (1) An image processing apparatus characterized in that an original image within or outside a coordinate-specified area is masked with solid black or solid white so as to be able to be printed. (2) An image processing device that is capable of printing an original image by varying the vertical and horizontal magnifications at different magnifications. (3) An image processing device characterized in that an original image can be printed by reversing white/black. (4) When scanning an original with a CCD, the CCD detects the extreme value after shading correction for each main scan or several main scans, and controls the next or several next main scans accordingly. Characteristic image processing device. (5) An image processing apparatus characterized in that, when converting an original by a photoelectric conversion element to obtain a binary signal, a density switching means of the operation section is linked to selection of a threshold value or a threshold value array. (6) An image processing device, which is a digital copying machine that obtains an image signal by reading an original image using a CCD, and is characterized in that a plurality of prints can be made from different original surfaces on a platen surface. (Shading correction using a common CCD. Image processing device that enables at least two of AE and coordinate recognition. (8) At least lamp dimming A using a common CCD.
E. An image processing device that enables two of the following: coordinate recognition. (9) CCD connection correction using a common CCD. An image processing device that enables at least two of AE and coordinate recognition.