JP2575300B2 - Image processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus for recording an image of a document at the center of a recording sheet.

[0002]

2. Description of the Related Art Conventionally, a copying machine merely reproduces an original faithfully or reduces or enlarges the original at a fixed magnification. The principle of the copier is that the original is illuminated by a light source such as a fluorescent lamp or a tungsten lamp, and the light reflected from the original surface is used as an original image on a photoreceptor whose surface is directly charged in advance via a lens or mirror. Irradiation forms an electrostatic latent image, after which a developer is applied to this photoreceptor to form a visible image.

Further, a function of designating a desired area in a document, extracting only an image of the designated area, and forming an image has been considered.

[0004]

However, when an image in a designated area of a document is copied onto a recording sheet, the copied image is copied to a position on the recording sheet corresponding to the designated area of the document. For example, the image in the lower left corner of the document is copied to the lower left corner of the recording sheet, making the copy hard to see.

Further, depending on the size of the recording sheet, there is also a disadvantage that an image in a designated area is not copied on the recording sheet.

Therefore, it has been considered to designate a copy position so that an image of a document is recorded at a desired position on a recording sheet.

However, the operator has to perform an operation of inputting a recording position, and the operability is poor. In particular, if it is desired to record at the center of the recording sheet, the operator has to calculate the recording position.

[0008] An object of the present invention is to provide an image processing apparatus which eliminates the above-mentioned disadvantages.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a document table on which a document is placed, scanning means for scanning the document placed on the document table, Area designating means for designating an area, and recording means for recording an image of a document scanned by the scanning means on a recording material,
The longitudinal end of the recording material and the vertical length of the image of the designated area formed on the recording material according to the front and rear end positions and the recording material size in the vertical and horizontal directions of the area designated by the area designation means. The distance from the edge in the direction is half the value obtained by subtracting the length from the leading edge to the trailing edge of the document in the vertical direction from the length in the vertical direction of the recording material, and
The distance between the horizontal edge of the recording material and the horizontal edge of the image in the designated area formed on the recording material is determined by the length from the leading edge to the trailing edge of the document in the horizontal direction. Control means for determining a moving amount of the image that is half the value subtracted from the length in the direction, and recording the image of the document at the center of the recording material based on the determined moving amount. .

[0010]

According to the present invention, an image in the designated area is recorded at the center of the recording material in accordance with the designated area of the document and the size of the recording material, so that an easy-to-view image is obtained.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

In this embodiment, an original is irradiated with a light source, and the reflected light, which is an original image, is not directly projected on a photosensitive member, but is projected on a photoelectric conversion element to obtain an original image as an electric signal. The electric signal is processed by circuit means and software means to enlarge / reduce the original image to a continuous arbitrary magnification, extract an arbitrary area of the original image, and separate this area. Move to any area of
Further, by combining these three functions, an arbitrary area of the original image is enlarged / reduced to an arbitrary magnification and moved to an arbitrary place, and a multifunctional image processing capability and the like are obtained. The apparatus of this embodiment has a function of transmitting image information to a distant place. Further, some image processing methods using conventional image memory means have been proposed, but the apparatus of this embodiment performs the above-described processing in real time while scanning a document image, thereby eliminating the need for the memory means. That is to reduce the width cost.

FIG. 1 shows the appearance of a copying apparatus according to the present invention. This device is basically composed of two units. Reader A and printer B. The reader A and the printer B are mechanically and functionally separated so that they can be used independently. Connections are made only by electrical cables. Reader A
Has an operation unit A-1. Details will be described later.

FIG. 3 is a structural sectional view of the reader A and the printer B. The original is placed downward on the original glass 3 and its placement reference is on the left back side when viewed from the front. The original is pressed onto the original glass 3 by the original cover 4. The original is illuminated by the fluorescent lamp 2, and an optical path is formed so that the reflected light is focused on the surface of the CCD 1 via the mirrors 5 and 7 and the lens 6. The mirror 7 and the mirror 5 move at a relative speed of 2: 1. This optical unit is PL driven by a DC servomotor.
Move from left to right at a constant speed while applying L. This moving speed is 180 mm / sec for the forward path where the document is irradiated.
The return path is 468 mm / sec. The resolution in the sub-scanning direction is 16 lines / mm. The size of the document that can be processed is A5 to A3, and the placement direction of the document is A5, B5, and A4 in the portrait orientation, and B4 and A3 in the landscape orientation. The optical unit is provided with three return positions according to the size of the document. The first point is A5, B5,
A4 common, 220 mm from the original reference position,
The point is also 364 mm at B4, and the third point is also 431.8 mm at A3.

Next, in the main scanning direction, the width of the main scanning is 297 mm, which is a maximum A4 width, depending on the above-mentioned document placing direction. Then, in order to resolve this at 16 pel / mm, the number of bits of the CCD is 4752 (= 297 × 1).
6) Since two bits are required, this apparatus uses two 2628-bit CCD array sensors and drives them in parallel. Therefore, 16 lines / min, 180 mm /
From the condition of sec, the main scanning cycle (= CCD accumulation time)
Is

[0016]

[Outside 1] Becomes CCD transfer speed is

[0017]

[Outside 2] Becomes

Next, referring to FIG. 3, an overview of the printer B placed below the reader A will be described. The bit-serial image signal processed by the reader A is input to the laser scanning optical system unit 25 of the printer B. This unit 25 comprises a semiconductor laser, a collimator lens, a rotating polyhedral mirror, an Fθ lens, and a tilt correction optical system. The image signal from the reader A is applied to the semiconductor laser and converted into light and light. The divergent laser light is collimated by a collimator lens, and is irradiated on a polyhedral mirror rotating at high speed, thereby scanning the photosensitive member 8 with the laser light. I do.
The number of rotations of this polyhedral mirror is 2,600 rpm. The scanning width is about 400 mm, and the effective image width is 297 mm, which is A4 horizontal size. Therefore, the signal frequency applied to the semiconductor laser at this time is about 20 MHz.
(NRz). The laser light from the unit 25 is incident on the photoconductor 8 via the mirror 24.

The photoreceptor 8 comprises, for example, three layers of a conductive layer, a photosensitive layer and an insulating layer. Accordingly, a process component is provided for enabling image formation. 9
Is a pre-discharger, 10 is a pre-discharge lamp, 11 is a primary charger,
12 is a secondary charger, 13 is a front exposure lamp, 14 is a developing device, 15 is a paper feed cassette, 16 is a paper feed roller, 17 is a paper feed guide, 18 is a registration roller, 19 is a transfer charger, and 20 is a transfer charger. A separation roller, 21 is a conveyance guide, 22 is a fixing device, and 23 is a tray. The speed of the photosensitive member 8 and the transport system is 180 mm / sec as in the outward path of the reader. Accordingly, the speed when copying is performed by combining the reader A and the printer B is 30 sheets / minute at A4. Further, the printer B uses a separation belt on the front side to separate the copy paper adhered to the photosensitive drum 8, but an image corresponding to the belt width is missing. If a signal is also applied to the width, development will occur, the separation belt will be stained by the toner, and the subsequent paper will also be stained.
In advance, the reader side cuts the video electric signal of the print output for the width of the separation belt of 8 mm.
Further, when toner is adhered to the leading edge of the copy paper, the toner may be wrapped around the fixing roller of the fixing unit 22 when fixing is performed. It is cut by. Next, FIG.
7 and 18 show the main scanning direction of the reader A and the printer B and the output image. The reader is performing main scanning toward the back side.

The copying apparatus of this embodiment has intelligence for image editing and the like. This intelligence is performed on the reader A by processing the signal read by the CCD 1. In any case, a constant speed (13.89) with a constant number of bits (4752).
MHz). The intelligence functions include: magnification from 0.5 to 2.0 times, enlargement / reduction to a specific magnification, trimming function to extract image only in specified area, copy of trimmed image There is a move function to move to any place on paper. In addition, there is a function of performing halftone processing in 32 gradations by key designation. Furthermore, it has a composite function combining these individual intelligent functions. 26 to 2
FIG. 8 shows specific examples of these.

(A) shows the editing function, (1) shows the surface of the original, (2) shows the state when the copy is completed when only the trimming coordinates are specified, and (3) shows the trimming coordinates + When the movement coordinates are specified (however, an error is displayed when the size exceeds the copy paper size), (4) specifies trimming coordinates + specification of the movement coordinates + enlargement of an arbitrary magnification (however, an error is displayed when the size exceeds the copy paper size). When I went,
(5) Trimming coordinate designation + moving coordinate designation + reduction of arbitrary magnification, (6) Trimming coordinate designation +
AUTO specified (0.5 to 2 times cassette
(7) shows the state at the time of copy completion when the trimming coordinate designation + AUTO designation is performed when (magnification is changed from the reference position according to the size direction). The trimming coordinates shifted to the movement coordinates are determined based on the coordinate point having the smallest value in the sub-scanning direction.

FIG. 2B shows the relationship between the CCD and the main scanning direction of the laser, and FIG. 2C shows the method of specifying trimming coordinates.

In the case of one work enclosed by a straight line, the designation order is as follows. This coordinate designation is performed using the numeric keypad 12a in FIG.

FIG. 2 shows a transparent holder A-2 which can be sandwiched between the original cover 4 and the glass 3. This holder is formed in a bag shape with two sides attached so that the original can be stored. And has the same size as the surface of the glass 3. One of the bag holders is provided with a sectioned line as shown in the figure, and the periphery of the line is vertical, horizontal 1 or 5
The coordinates of 1 to n and 1 to m at intervals of 10 to 10 mm are drawn. Each coordinate point corresponds to each point on the glass 3. Therefore, when the document is sandwiched in the bag holder with the image plane of the document facing the coordinate plane, it can be visually recognized that the image plane of the document is indicated by the coordinates described above. Therefore, the trimming coordinates and the movement coordinates shown in FIG. 19C can be input by operating the keys of the operation unit A-1 while viewing the holder. After the input, the image surface of the original is turned upside down and stored again in the bag holder and placed at a specified position on the surface of the glass 3, or the original is pulled out of the bag holder and placed. If the coordinates are drawn in a color of a wavelength that the CCD 1 is insensitive to, the original can be placed at the reference position on the glass surface with the original placed in the bag holder. The bag holder is 3
A side or one side may be laminated. One-sided lamination, that is, a folded sheet configuration,
Coordinates can be specified for an original such as a book.

Next, the functions of the present embodiment will be described. In addition to the mere copying function, this device has a scaling function that allows arbitrary enlargement and reduction, an editing function that extracts or deletes any part of the original, and automatically detects the size and position of the original. It has various functions such as automatic scaling and editing. Such a function of operating an image on a document is generally referred to as an “image operation function”. In addition to copying a document image read by a reader with a connected printer, the CCU (Communication C
The document image can be transmitted to another printer via the control unit (communication control unit).
Also, an original image sent from another reader can be received by the printer at hand. Such a function is called an “image transfer function”. In addition, the selected function
Any number of preset keys can be registered.
The registered contents can be arbitrarily specified by the user, and the contents are retained even when the power is turned off.

Such a function is called a "preset function". Further, there are an automatic exposure function for removing the background of the document and a halftone processing function for outputting an image having a gradation such as a photograph with good reproducibility. These are generally referred to as “image quality processing functions”. To summarize, there are the following five image operation functions.

That is, the same magnification (magnification 100)
%), Fixed magnification (size specification), stepless magnification (magnification 50-200%), and XY magnification (independent magnification in the main and sub scanning directions). The image inversion function includes an original image and a negative / positive inverted image. Editing functions include editing pear, white masking, and black masking. However, the latter two are automatically set to the XY scaling auto function, and other scaling functions cannot be designated. There are white frame trimming, black frame trimming, and automatic document position detection. However, here, scaling, image inversion, movement,
The special zoom function is linked. The movement functions include no movement, designation of destination, movement to the origin (cornering), and centering. The special scaling function includes no special scaling designation, no scaling auto, and XY scaling auto. However, the latter two cannot specify other scaling functions. The movement function and the special scaling function are enabled only when the editing function of white / black frame trimming and automatic document position detection is specified.

The image transfer function includes local copy (normal copy), transmission (sending an original image to another printer via the CCU), and receiving (receiving an original image from another reader via the CCU). ).

The preset functions include registration (stored in the preset key), reading (reading out the stored contents of the preset key), and resetting (returning all functions to the standard mode).

The image processing function includes automatic exposure (A
E), there is halftone processing.

FIG. 4 is a detailed view of the operation unit A-1 in FIG. This operation unit is roughly divided into three blocks.
The block on the right is a general-purpose key display unit 100 found in a conventional copying machine. The central block is a function key display unit 300 for calling and using a copy transmission function arbitrarily created and registered by a user according to a program. The block on the left is a soft key display unit 200 for allowing the user to arbitrarily create a copy / transmission function. First, the general-purpose key display unit 100 will be described. Reference numeral 103 denotes a desired copy number set display and a copy number display 7 in the middle.
It is a segment LED display. Reference numeral 102 denotes a warning display such as a jam, no toner, no paper, or a copy interrupt used in a conventional copying machine. Reference numeral 104 denotes a copy density switching lever and a density display obtained by the lever. 10
Reference numeral 5 denotes a selection indicator for a document image of only characters, a photograph only, a mixture of characters and photographs, and a section paper. These are provided to perform different image processing so that four types of original images can be copied in an optimized form. Reference numeral 106 indicates whether the selected cassette stage is an upper stage or a lower stage. Reference numeral 107 denotes a display for displaying the size of the paper stored in the cassette of the selected cassette stage. Reference numeral 108 denotes a numeric key group of 0 to 9 and C, which is used to set the number of copies on the display 103 and to display the soft key
00 is used for entry of numerical values (for example, trimming coordinates, moving coordinates, scaling ratio, transmission destination address designation, etc.) in the program creation process. Then, 109 is used as a confirmation key for the key entry content displayed on the display unit 200.
Entry key is provided. 110 is an interrupt key for interrupting multicopy and performing another multicopy,
Reference numeral 111 denotes a copy / cancel key for stopping multi-copy or reception of the printer B, and 101 denotes a copy key for instructing the printer to start printing or transmission. 113 is a document image switching key of the selection display 105;
Reference numeral 112 denotes a cassette stage switching key. 113, 112
Shifts from top to bottom each time the key is turned on. In the function key display section 300, the cover is structurally detachable in this portion. The reason is that, as described above, one of the functions created arbitrarily in the soft key display section is registered and corresponds to one key of 302, so that the function created by oneself is given a certain name to the key 302. Must be written. Therefore, after registering the function, remove this cover
The operation of writing the name in 02 and attaching the cover again is performed. As described above, since six function keys 302 are prepared, the user can register six functions.
When the user creates a function in the soft key display unit 200, a message asking whether to register the function in the soft key display unit 202 appears.
In response to this, all six of the indicators 303 corresponding to the six keys in the function display unit 300 perform a blinking operation. This means that the machine is asking the operator, "Which function key should the function be registered?" Therefore, at this time, when the operator presses any key, the display corresponding to that key is turned on, and the other displays are turned off. Then, the operator removes the cover, writes the function name on the key, and puts on the cover again. Thereafter, the registered contents are not erased even when the power switch is turned off, since the memory is backed up by a battery. A key 301 is a standard mode return key.

The display 114 is provided with the interrupt key 11
When 0 is turned on, the light is turned on. On the other hand, when the receiving mode is set, a blinking display is displayed to notify reception of image data from another station, and printing by the copy key 101 is prevented. During reception printing, data setting and registration can be performed using the key units 200 and 300. Therefore, when the copy key 101 is turned on after the reception print is completed or during reception, the received contents (source address, total number of received prints, number of received prints) are displayed on the liquid crystal display 202. This display is turned off by the clear key C, and the standard mode display or data set before the copy key 101 is turned on is displayed. If the cancel key 111 is turned on during the reception of the multi-print, the paper feeding is stopped, the print cycle for the paper already in the passage is completed, and the printing is stopped. The transmitting side displays a message on the liquid crystal display 202 indicating the suspension.

The reader unit will be described in detail. FIG. 5 shows a system block diagram of the reader unit. The interface signal with this reader is shown on the right. When connecting to the printer, the connector JR1 is connected to the connector JP1 on the printer side and the connector JP1 on the printer side.
When a reader / printer is set and external communication is performed, a signal originally going from JR1 to connector JP1 is once input to JC1 of the communication control unit (CCU), and connected to JP1 from JC1 'of the communication control unit (CCU). It has become. Separately, JR2 and JC2 are connected as protocol signals. The timing of the interface signal of JR1 is shown in FIGS. BEAM DET
The ECT signal BD is used to synchronize with the rotation of the scanner when the printer is connected, and corresponds to the leading end signal of each line. VIDEO is an image signal, and 4752 pixels are output with a width of 55 ns per pixel per line. However, one pixel has a state of up to three values, that is, 0, 1/2, and 1; therefore, at 0, the width L is 55 ns, and at 1/2, the first 27.5 ns is H and the second half is 27.5 ns. Is L, 1
Then, the width H becomes 55 ns. This signal is output in synchronization with the BEAM DETECT signal when the printer is connected, and is output in synchronization with the internal pseudo signal otherwise (transmission to other devices, etc.). VIDEO ENABLE
E is a period signal during which the image data is output in 4752 bits. This is also output in synchronization with the BEAM DETECT signal or an internal pseudo signal. VSYNC is the output of the image leading edge detection sensor 37b and the BEAM DETEC
This signal is output in synchronization with the T signal or an internal pseudo signal, and means that image data is output from this signal. The signal width is the same as VIDEO ENABLE. The PRINT START signal is a paper feed command to the printer. This PRINT START and VSYNC
Is determined by the control circuit (FIGS. 10 and 16) in consideration of the magnification and the trimming area. PRINT
END is a response signal from the printing side, which is output when the trailing edge of the copy sheet separates from the photosensitive drum 8 and rides on the conveyor belt 12, and indicates that the printing operation has been completed. This detects the completion of the separation of the copy paper, and is issued at a sequence timing. ABX CONNECT
The T signal indicates that the CCU has been connected. When the CCU is connected, this terminal is dropped to GND in the module, whereby the communication is activated.
The PRINTER CONNECT signal is PRINTER
Is output when is connected, and this terminal is connected to GND on the printer side. As a result, a print operation state is set.

S. DATA, S.M. CLK, CSC BU
SY and PSC BUSY are serial signal lines for performing a protocol between the reader A and the printer B (permitting transmission between them and exchanging information such as a signal).

S. DATA, S.M. CLK is 16-bit protocol data and a clock, both of which are bidirectional lines. CSC BUSY is output when the reader outputs data and clock to the line,
C BUSY is output when the printer outputs data and a clock to the line. Thus, these are
DATA and S.M. This is a line indicating the transmission direction of CLK. See FIG. 8 for detailed timing.

Referring back to FIG. 5, the system block of the reader will be described. The CCD reading units 601 and 601 'incorporate a CCD, a clock driver for the CCD, a signal amplifier from the CCD, and an A / D converter for A / D converting the signal. The control signal to the CCD is generated by CCD control signal generators 603 and 603 ',
01, 601 '. This control signal is generated in synchronization with the horizontal synchronization signal BD from the printer B. 6 from the CCD reading units 601 and 601 '
The image data converted into the digital signal of bits is output and input to the image processing units 602 and 602 '. In the image processing units 602 and 602 ', a sampling circuit for sampling the CCD output and controlling the light amount of the light source by the CPU 614, a shading amount detection circuit such as a light source and a lens, a correction circuit therefor, and a main circuit for performing the AE function. A peak hold circuit for detecting the peak value of the amount of light in scanning, and the 6-bit image data after the completion of the shading correction is determined into a slice level based on the peak hold value or dither pattern of the previous line or the line before the previous line, and is binarized or converted into three. It has a quantization circuit for performing value conversion. Image processing units 602, 60
The image signal quantized in 2 'is sent to image editing units 604 and 60
4 '. The image editing units 604 and 604 'have a buffer memory for two lines. The capacity of one line is twice as large as the number of pixels of 4752 per line. The reason for this is that each pixel data is written to the memory at twice the sampling rate when the image is enlarged by 200%.
This is because the data amount is doubled. Also, the buffer memory for two lines is used because the memory cannot simultaneously perform writing and reading, so that when writing the image data of the Nth line to the first memory, the Nth line to the (N-1) th line is used. This is for reading out the image. In addition, this portion includes a write address counter for writing image data to the buffer memory, a read address counter for reading, and an address selector circuit for switching address signals from the two counters.
The counter uses a parallel load type in which an initial value can be preset, and the CPU 614 loads the initial value to the I / O port. The CPU 614 is an operation unit 6
In accordance with the coordinate information designated by 07, each time the sub-scan reaches the line corresponding to the trimming coordinates, the counter is preset with an address value corresponding to the main scanning coordinates, thereby enabling the editing of the document information. There is a coordinate area control counter and a gate circuit for enabling white masking, black masking, white frame trimming, and black frame trimming. There is a joint detection shift register for automatic CCD connection. The image data from the image editor is initially 60
The output from the output unit 4 and then from the output unit 604 'is switched by the synthesizing unit 605 to smoothly switch the data into one serial image data. After the copy button is turned on, the recognition unit 606 performs a pre-scan of the document during the idle rotation period of the printer,
This is for detecting the coordinates where the document is placed at that time. In this part, there are a shift register for detecting 8 bits of continuous white image data, an I / O port, and a main / sub scanning counter. A key matrix, LE
D, liquid crystal and liquid crystal driver. Reference numeral 608 denotes a DC motor for scanning the optical system, and 609 denotes a driving circuit thereof. 6
Reference numeral 10 denotes a fluorescent lamp for document illumination, and reference numeral 611 denotes a lighting circuit thereof. A photo sensor 612 detects that the optical system unit is at the home position, and a photo sensor 613 detects that the optical system unit is at the position where the front end of the document is irradiated. The CPU unit 614 includes a CPU and an RO.
M, RAM, battery backup circuit, timer circuit,
It is composed of an I / O interface. CPU unit 61
Reference numeral 4 controls the operation unit 607, controls the sequence of the reader in accordance with an operation command from the operator, and controls the printer by a command. Further, in accordance with a command relating to image processing from the operation unit 607, prior to or during document scanning, the image processing units 602 and 602 ', the image editing units 604 and 60 are used.
Data is set for various counters at 4 '. Further, the CPU 614 controls the light intensity of the fluorescent lamp lighting device 611 based on the light intensity data from the image processing unit prior to scanning of the original, and according to the magnification command, the DC motor driving circuit 60.
9 is preset to speed data,
04, 604 'are collected and the amount of connection is calculated.

FIG. 6 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, first, a shift memory and a RAM, which will be described later, are reset (1). Times,
No editing, positive, and no transmission are set, and a lower cassette, a text document, and one sheet are set on the 100 side. That is, the standard mode is set (2). This is the same when the interrupt key 110 and the reset key 301 are turned on. Next, a copy key is determined (3), and if not (N), it is determined whether or not reception is performed (4). After setting the mode and data according to 200 and 300, and registering, it is determined whether or not the printer is capable of printing (6). When the copy key is ON, it is determined whether or not transmission is performed (8). When the copy key is ON, a print start signal is output to the CCU (9). (10). In the reception mode, transmission and printing are prevented even if the copy key is turned on. However, the display of the mode data up to that point is saved in an area of the memory, and the received content is displayed on the display 202 instead (11). . The display returns to the original mode data display from the display by the clear key (12). As long as the copy key is not turned on, entry by the key units 200 and 300 is enabled, and its change is also enabled (13). When the reception is completed (14), the process proceeds to the copy key routine of step 3 and
Make it copyable. When the cancel key 111 is turned on in step 13, the process proceeds to step 3 after a predetermined time, and the reception is stopped. When the clear key is turned on in step 13, the data on the number is reset and cleared, but the mode data and the like set by the soft key are not reset. The standardization is reset by the key 301.

The sequence control will be described with reference to FIGS. As shown in FIG. 9, three position sensors 37a to 37c are provided on the scanning optical system of the reader. The optical system home position sensor (outputs the signal OHP) is on the leftmost side when viewed from the front of the reader, and the optical system is normally stopped at this position. When the reader A is driven, the optical system starts scanning from left to right, and an image tip sensor 37b is provided just at the reference position of the image. When the control circuit detects the sensor 37b, the image data signal (VIDEO, CL)
K) and outputs each main scan cycle (347.2).
μS) (VIDEO ENAB)
LE). Then, the control circuit counts the number of VIDEO ENABLE signals to the sensor 37b.
Counting is started, and when the count value α corresponding to the first point, the second point, and the third point according to the cassette size or the magnification of the printer B is reached, the optical system forward drive signal is turned off, and the reverse drive signal is turned off. And reverses. A PRINT START sensor 37c is provided in the middle of the return path. When the optical system activates this sensor 37c after the reversal, the control circuit determines whether or not the specified number of copies have been scanned. Generates a PRINT START signal for giving the next paper feed instruction. The sensor 37 so that T ₂ of the FIG. 9 is equal to T ₁
It is necessary to adjust the position of c.

Next, a method of enlarging / reducing a document image will be described with reference to FIG. The basic concept of zooming 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 magnification input by the key, further calculates the PLL frequency corresponding to the speed, and presets it in the I / O latch (1) 58 before scanning. On the return trip, a fixed value is set, thereby returning the optical system at high speed. This is done by presetting the value stored in the ROM of the CPU in the I / O latch (1) 58. Therefore, when the image is enlarged twice, it is moved at half the speed of the speed at the same magnification (180 mm / sec), and when it is reduced to half, it is moved at twice the speed. The main scan is a CCD 1 that is output at a constant frequency.
Is a method of sampling the serial signal (after A / D conversion) at a clock rate according to the magnification. For example, when the image is enlarged twice, sampling at a clock rate twice as high as the CCD clock rate allows 1 bit of the original information to be 1 bit.
When data is obtained by increasing the number of bits, and when the data is reduced by a factor of two, if sampling is performed at a half clock rate of the CCD clock rate, data obtained by thinning out one bit from two bits of the original information can be obtained. The CPU calculates this clock rate based on the input magnification, and performs I / O before starting the sub-scan.
The latch (2) 50 is set. As described above, the CCD 1 has a 2628-bit configuration, in which there are 36 dummy bits and 259 effective bits.
That is, 2 bits. And that the driving frequency is a 7.569MHz, the signal line is phi ₁ clock line 55. Clock line φ _{2 for} zooming
Is based on the same value of the original oscillation I / O latch (2) as φ ₁ , the frequency oscillated by the VCO 49 is synchronized by the PLL 48 and forms a variable frequency as φ ₂ . CCD1
The 2592-bit analog signal output from AMP is
It is amplified at 42 and applied to an AGC (automatic gain control circuit). The AGC 43 detects the white level due to a long-term change in the amount of light of the fluorescent lamp, the background of the document, etc., and detects the white level, and clamps the white level so that the relative change from the white level can be applied to the A / D converter 44. Circuit. The output of the AGC 43 is A / D converted and
It is converted into a value of 6 parallel bits. On the other hand, the dither ROM 54 has the same weight code (6 bits) in the main scanning direction at 8-bit intervals and also in the sub-scanning direction at 8-bit intervals.
Is set to output, and this 8 × 8 = 6
In the 4-bit matrix, 32 kinds of weight codes are allocated. Therefore, the 3-bit main scanning counters 51 and 3
This dither ROM is controlled by a sub-scanning counter 52 of bits.
By addressing 54, different weight codes are output. In addition, there are a plurality of combinations of weight codes set in this 8 × 8, and consideration is given to changing the reproducibility of the halftone image by the combination. The selection of this combination is performed by the I / O latch (3) 53
The preset to the latch (3) 53 is performed by the CPU before the sub-scanning is started. The main scanning counter 51 is driven by the phi ₂ clock is variable frequency due to the magnification, the subscanning counter 52 BEAM D
It is driven by the ETECT signal. Then, the 6-bit weight code from the dither ROM 54 and the A / D converted 6-bit code are compared by the comparator 47 and binarized to obtain a serial halftone reproducible image signal. I have. Therefore, the meaning of sampling at different clock rates is A /
This means that the D-converted value is compared with a weight code output at a different clock rate. if,
After comparing this comparison with φ ₁ at the same rate,
When scaling is performed by simply decimating and inserting bits under a certain algorithm, that is fine for a normal binary image.
If you go to halftone and do something with a dither,
The 45 ° dither pattern becomes a pattern such as 30 ° or 60 °, or the pattern becomes stepwise, and smooth reproduction cannot be obtained. Therefore, in this example, the comparison rate is changed according to the magnification of the magnification.

Next, there is a circuit 45, which is φ ₁ again because the conversion time by A / D conversion differs for each bit.
And synchronized. Moreover, as a matter of course, the address counter 63 of the shift memory 57-1 and 57-2 is moved in the phi ₂ clock. As described above, the shift memories 57-1 and 57-2 store 2592 at the same magnification.
Bits, 1296 bits for 1/2 times, 5184 bits for 2 times.

The speed of the sub-scanning DC mode 37d is determined by the CPU by the value preset in the I / O latch (1) 58 by the VCO.
59, and the resulting oscillation frequency is equal to the original oscillation and PL
It is synchronized with L60 and is controlled by being applied to the servo circuit 61. Note that the sub-scanning stroke at the time of magnification change scans to the third point (431.8 mm) at any magnification. This is convenient for designating an area for stepless magnification (CCD joint correction).

A method for automatically connecting the two CCDs 1 and 2 (main scanning direction) will be described.

As shown in FIG. 14, a white plate is provided over the main scanning width on the home position (on the switch 37a) of the reader (optical system). When the optical system is normally at the home position and the light source is turned on, this white plate is provided. The white plate is illuminated, and the reflected light is input to the CCDs 1 and 2. Accordingly, when the control circuit is at the home position, the control circuit corrects (shading correction) a variation in light amount and a variation in sensitivity of the two CCDs 1 and 2. Further, a black fine line Bl having a width of 2 mm and being long in the sub-scanning direction is provided at the center position of the white plate. Note that the fine line may have an integral multiple of the width of the quantization. Similarly, when the optical system is at the home position, turning on the light source causes a black thin line to appear at the bit at each end of the two CCDs 1 and 2.
The signals 1 and 2 are input to the shift memory, and the lower 128 bits of the CCD1 system signal and the upper 128 bits of the CCD2 system signal are compared. Then, it is confirmed that white bits always appear before and after each of the 128-bit data and black bits are sandwiched. Then, the number of bits obtained by adding the number of lower white bits of the CCD1 system and the number of upper white bits and black bits of the CCD2 system is thinned out when reading from the shift memory of the CCD2 system. In the drawings, the arrows of the CCDs 1 and 2 indicate the main scanning direction, and the sub-arrows indicate the sub-scanning direction.

FIGS. 15 and 16 show a specific method.
To write the image signal to the shift memory,
Since a static RAM is used for the memories 57-1 and 57-2, a write address counter (write address counter 63) and a read address counter (read address counters 64 and 65) are provided. Amount of information to be inputted to the CCD is different because this example for each magnification of the magnification change, firstly the CCD1 system write address counter (1) than in the up-count LSB, counted by the clock phi ₂ is input, nothing Check if counting has stopped. This is stored in the RAM of the CPU. If the magnification was the same, it should stop at 2592 counts. Next, in order to take out the upper 8 bits of the CCD1 system (the first bit that appears in the main scan is the MSB) and the lower 8 bits of the CCD1 system, the above-mentioned confirmed value is set in the write address counter of the CCD1 system. Then, 08H (hex code 08) is set in the address counter of the CCD2 system, and the down count mode is designated. On the other hand, 8-bit shift registers 74 and 76 for inputting image signals from the respective CCDs are provided.
Is a VIDEO E indicating the main scanning period of the CCD.
From the rise of the NABLE signal, the counter (VIDE
Operated by the clock output during O ENABLE. ) Up to the ripple carry, C
In the shift register 74 of the CD1 system, the image signal of the most significant 8 bits of the CCD1 system remains, and in the shift register 76 of the CCD2 system, the lower 8-bit image signal remains. The values remaining in the shift registers 74 and 76 are read by the CPU and stored in the 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 CCD2 system, (the confirmed value -8) is set in the write address counter of the CCD1 system,
10H is set in the write address counter of the system, and reading is performed in the same manner as described above. This operation is repeated one after another, and the upper 128 bits of the CCD1 system, the CCD
After developing the lower 128 bits of the second system in the memory, the number of black bits, the number of lower white bits of the CCD1 system, and the upper white bit of the CCD2 system are calculated. 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 is calculated by the shift memory (2) 57-
By skipping the data when reading from 2, the splicing in the main scanning direction is achieved.

Next, the operation of the shift memory after the joining logic is established will be described. When writing to the shift memories 57-1 and 57-2, the value of the number of stops is preset in the write address counters of the CCD1 and CCD2 systems, and the shift memory is addressed by down counting. Write. The first consideration when reading from the shift memory is the reference in the main scanning direction of the document. As shown in FIG. 14, the document placement reference is 148.15 mm from the center of the connecting thin black line (1.5 mm width).
Since the distance is 5 mm, the read start address of the shift memory (1) 57-1 of the CCD1 system is (the number of lower white bits) + (the number of black bits / 2) + (148.5).
× 16 × magnification). The read start address of the CCD 2 system is the value of (the value confirmed above)-(the number of connection bits). Then, the read address counter (1) 64 of the CCD1 system is first operated by down-counting with a read clock of 4752 pulses at 13.89 MHz, and when it becomes 0 and ripple carry occurs, the read address counter (2) of the CCD2 system. ) 65 moves down count.

FIG. 16 is a circuit diagram relating to these shift memories. The shift memory (1) 57-1 is a static memory for storing image data of the CCD1 system. The shift memory (2) 57-2 is a static memory for storing image data of the CCD2 system. Write address
The counter (1) 63 is a shift memory (1) 57-1,
And (2) an address counter for writing data to 57-2. Read address counter (1) 64
Is an address counter for reading data from the shift memory (1) 57-1, and a read address counter (2) 65 is an address counter for reading data from the shift memory (2) 57-2. The address selector (1) 71 is a write address counter (1) 6
3 address signal and read address counter (1)
The address selector (2) 71 selects one of the 64 address signals and addresses the shift memory (1) 57-1, and the address selector (2) 71 reads the address signal of the write address counter (1) 63 and the read signal. The address counter (2) is for selecting any of the address signals of the address 57-2 and addressing the shift memory (2). The shift register 74 is a register for extracting the image data of the CCD1 system from the lowest bit by 8 bits, and the shift register 76 is a register for extracting the image data of the CCD2 system from the highest bit by 8 bits. The F / F 73 is set at the rising edge of the VIDEO ENABLE signal, and is used to control the period of input to the shift register 74 by a flip-flop (F / F) reset by the ripple carry of the write address counter (1) 63. And F / F75 is VID
This F / F is set at the rising edge of EO ENABLE and reset by the ripple carry of the read address counter (2) 65 to control the period of input to the shift register 76. The I / O port 72 is an I / O for the CPU to confirm how far the CPU has read when the write address counter (1) 63 is moved up. I / O registers 66, 67,
69 is a write address counter (1) 63;
These registers are for the CPU to provide preset values to the address counters (1) 64 and (2) 65, respectively.
The I / O register 68 is used by the CPU to specify whether to count up or down to the write address counter (1) 63 and the read address counter (2) 65, and the address selector (1) 70 ,
(2) Select either counter value for 71 or CPU
Is used to determine whether the read address counter (2) 65 is operated by the write clock or the read clock.
By providing the st signal, the CPU controls so that one line of image data is supplied from the CCD driver circuit to the shift memory circuit.

According to this circuit diagram, C
The image data of the CD1 system is transferred from the least significant bit by 8 bits at a time.
An operation of extracting 128 bits of the D2 system image data from the most significant bit by 8 bits will be described.

First, the CPU sets the write address counter (1) 63 to the up-count mode and sets 0 to the I / O register (1) 66. By giving one pulse as a TEST signal (corresponding to a machine start) of the I / O register (4) 68, one VIDEO ENABLE and φ2 clock corresponding to the magnification are generated from the CCD driver of FIG. -It is given to the memories (1) 57-1 and (2) 57-2. I /
Write address counter (1) 6 from O port 72
The value of 3 is taken in by the CPU. The write address counter (1) 63 is set in the down-count mode, the read address counter (2) 65 is set in the down-count mode, and the value stored in the I / O register (1) 66 is preset. 7H is preset in the / O register (3) 69. Apply one pulse to the TEST signal and
When DEO ENABLE disappears, 8 bits of the shift registers 74 and 76 are sequentially fetched and stored in the memory. (Value of -7H) in I / O register (1) 66
Is set to 10H in the I / O register (2) 67.
I do. Similarly, the I / O register (1) 6
6 to the I / O register (2) 67.
Is set to 7FH, a TEST signal is applied, and the operation is performed until the shift registers 74 and 76 are read. The seam correction is described in detail in Japanese Patent Application No. 57-128073 by the same applicant.

FIG. 19 illustrates a method of performing image editing in which a trimmed image is scaled to an arbitrary magnification based on an arbitrary point. (A) is a manuscript drawing, (B) is an enlarged view, (C)
Is a shift diagram. The basic method of image editing is to calculate coordinate values after editing based on the coordinate values of the trimming area, the moving coordinate values, and the magnification (A to C). The CPU determines the minimum value (from the document placement reference) 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 them as x ₀ and y ₀ . .
Since the coordinates are entered by a key in mm units and are also 16 lines / mm, the number of lines L ₀ of the y ₀ coordinate is (y ₀ × 1
6). The information amount I ₀ of the x ₀ coordinate is (x ₀ × 16) (A). The CPU determines the smallest one in the x-direction and the y-direction from the coordinate values of the area after editing, and sets them as x ₁ and y ₁ (C). x ₀ and the magnification and the x ₁ based determines the preset value of the read start address from the shift memory in reading the read address counter (C address A
3). This point will be described in detail with reference to FIG. This is to provide double the size of the shift memory (4752 x 2)
There are bits. Information amount I ₁ of the memory when the simple enlargement becomes (x ₀ × magnification × 16) bits. The address A ₁ of the shift memory in accordance with the magnification of x ₀ coordinate becomes (A ₁ -I _1). Incidentally, A ₁ is stored in the CCD tether correction at RAM start address of the memory. Meanwhile the number of lines L ₂ corresponding to the magnification of y ₀ coordinate becomes (L ₀ × magnification). Then determine the read start address A ₃ shift memory to be output from the shift point the enlarged image to x _1, but it A ₂ + I
It becomes ₂ . Note that I ₂ is the information amount according to the shift coordinate x ₁ ,
(X ₁ × 16). By the way, the number of lines L _{1 at the} y ₁ coordinate
Is y ₁ × 16.

Next, based on y ₀ , magnification and y ₁ , the aforementioned PR
INT START to determine the time interval from generation of the (paper feed) signal until up or VSYNK generating start the optical system (calculation of L _3). That is, L ₁ -L ₂ corresponds to it.
The reference the START signal or VSYNK signal when the difference is + L _3, L ₃ × main scanning cycle (347.2Myu
S) Put it out early. The time of -L ₃ is START signal or VS
The YNK signal is output later than the above. In order to output an image only to the editing area, a start bit counter and an end bit counter for gating only a part of the image data in the main scanning direction are provided. This corresponds to 80 and 81 in FIG. 16, respectively. This presets the count data for the gate via I / O. The flip-flop 82 is set by the count-up of the counter 80 and reset by the counter 81. FIG. 20 shows the operation.
The number of lines between the changing points in the sub-scanning direction is calculated from the coordinate value of the trimming area and the magnification (D, E, F). This is CP
This is performed by counting VIDEO ENABLE in U. In the figure, M is the number of lines between changing points in the sub-scanning direction, and H
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 during magnification (N = M × magnification).

The preset values of the start bit counter 80 and end bit counter 81 at the point of change from the edited x-direction coordinate value are calculated and set as shown in FIG.

Note that, even when an image is output on the entire surface without trimming, the start bit counter 80 and the end bit counter 81 are used as a margin at the leading end as a margin. At the time of initialization, it is the same as the above, but after counting 2 mm × 16 lines = 36 lines in the top margin, the start bit counter 8 is used to avoid the width of the separation belt.
0 is set to 7.5 mm × 16 bits = 120 bits.

FIG. 10 shows a configuration for correcting the shading of the light source for illumination of the original and the lens. Shading correction is performed in the following sequence when the optical system is at the home position for each copy. First, turn on the fluorescent lamp and set the home position HP
A standard white board or gray board of Bl width in the main direction shown in FIG. 14 above is irradiated, and reflected light is input to the CCD. At this time, the switch 701 is set to the 1 side in the circuit, and the signal photoelectrically converted from the CCD is subjected to AMP and A / D conversion. Then, the data is sampled every eight pixels, and RAM 702
Is written to. The reason for doing so every 8 pixels is RAM7
02 in order to reduce the memory capacity. Therefore, the correction of eight adjacent pixels (including white pixels) is performed based on the shading data of a certain pixel.

Next, when the optical system shifts to original scanning, the switch 7 is turned on.
Reference numeral 01 denotes the side 2. The A / D-converted image data of the CCD is sequentially input to the multiplication ROM 703 as an address signal, and the contents of the RAM 702 are also read once per 8 bits of the CCD signal. Is entered as The multiplication ROM 703 has a RAM 7
ROM if the input value from 02 is, for example, 3/4
At 703, the content obtained by multiplying the input value from the CCD by a value of 4/3 is written. Thus, the multiplication ROM 703 corrects the CCD signal based on the input value from the RAM 702 and outputs the corrected signal to the comparator 705. In addition, due to the configuration, there is a black thin line for automatic CCD connection at the center of the standard plate, so that when writing the shading value to the RAM 702, the correction value in this portion is written in the vicinity.

Further, the fluorescent lamp is stably adjusted by the reflected light of the standard gray plate. That is, by comparing the A / D output with the reference value and controlling the lighting cycle of the fluorescent lamp, light fluctuation of the fluorescent lamp can be prevented. This is performed before or after the shading correction.

FIG. 11 shows a binary circuit. Latch (1) 8
01 and the output from the dither ROM 704
The CPU is switched by the dither ROM 70 when an instruction such as a photo original is input on the operation unit.
4 to enable the output of the latch (1) 801 to be selected when an instruction such as a character document is input. When the instruction from the operation unit is included in the instruction for a text document or the like, the CPU selects the selector 803 to the latch (1) 801 and sets the peak hold value (FIG. 12) of the previous or previous main scanning line (FIG. 12) and the operation unit density lever. 1
The slice bell is determined based on the value 04 (FIG. 4) and set in the latch (1) 801. This removes the background (A
E) is performed. When the instruction from the operation unit is a photo original or the like, the CPU sets the selector 803 to the dither ROM 704.
At this time, the CPU sets the values of O to F based on the value of the operation unit lever 104.
Is set in the latch (2) 804 and selected. This differs in the level of dither elements and their arrangement.

Prior to the scanning of the original, the amount of connection of the CCD is set to C.
Although the calculation of the PU and the connection of the image data have been described above, the dither pattern also needs to be connected on the left and right.
Is set in the latch (3) 807, and the value of the main scanning counter (1) 805 is offset by that value. The counter (1) 805 is a 3-bit counter driven by the main scanning clock, and the counter (2) 806
Is a 3-bit counter driven by a sub-scanning clock, for example, a VIDEO ENABLE signal. From this, the dither pattern is a maximum 8 × 8 matrix. Note that the dither ROM 704 may be a RAM, and a matrix element of the RAM may be set by the CPU according to the input of OF.

FIG. 12 shows a circuit for AE. Regarding the background removal of the document, the peak value of the image signal from the CCD is detected for each main scanning line. In other words, the background of the document should reflect the largest amount of light when the document is illuminated.
If the peak value of the output is detected for each main scanning line (1/16 mm pitch) and the slice level is set at an intermediate point between the peak value and the minimum value, the background can be always removed. Then, when this slice level is set, it is not known that the peak value detection is completed until the main scanning is completed. Therefore, the slice level of the current line is basically set based on the peak value of the previous line. , After the main scanning of the previous line is completed. 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.
4 latched. After the latch, the latch data and the image data of the second pixel are compared by the comparator 705,
If the data of the second pixel is larger than the data of the first pixel, port A <B is output and set in the latch 904; otherwise, the data of the first pixel remains in the latch 904 as it is. Thereafter, when the same method is continued until the end of the main scanning, the maximum value remains in the latch 904. Saw data I
The data is read via the / O port 906 each time main scanning is completed. Thereafter, the CPU immediately determines the slice level and sets it in the latch (1) 801 in FIG.

Next, document position detection will be described. FIG.
9 shows a state in which the original 300 is placed on the original platen glass 3 of the reader A. Basically, the mounting position is fixed as described above, but the mounting position can be inclined as shown in the figure. In this case, when the main scanning direction from the reference coordinates SP on the original glass 302 is X, and the sub-scanning direction is Y, the coordinates of four points (X ₁ , Y
₁ ), (X ₂ , Y ₂ ), (X ₃ , Y ₃ ), (X ₄ , Y
₄ ) During the pre-rotation operation of the printer, the optical system is pre-scanned and detected. Thus, the size and position of the document can be determined. Thus, a scanner scan stroke during multi-copy can be determined, and a desired cassette can be selected. The original cover 4 (FIG. 2) is mirror-finished so that image data outside the area where the original is placed is always black data. In the sub-scanning, main scanning and sub-scanning are performed to cover the entire glass surface, and then scanning for printing is performed.
This sub-scanning speed is faster than during printing.

The logic for detecting the coordinates is shown in the circuit diagram of FIG. Image data VIDE binarized by pre-scanning
O is input to the shift register 301 in 8-bit units. When the 8-bit input is completed, the gate circuit 302
Checks whether all of the 8-bit data is a white image,
If Yes, 1 is output to the signal line 303. F / F 304 when the first 8-bit white appears after document scanning starts
Is set. This F / F 304 has been reset in advance by VSYNC (image leading edge signal). Thereafter, it is set and released until the next VSYNC comes. F / F30
When 4 is set, the value of the main scanning counter 351 (the main scanning counter 805 or the dedicated counter in FIG. 11) at that time is loaded into the latch F / F 305. This becomes the X coordinate. The sub-scanning counter 352 at that time is stored in the latch 306.
The value of (the sub-scanning counter 806 or the dedicated counter in FIG. 11) is loaded. This is Y ₁ coordinate values. Therefore P
₁ (X ₁ , Y ₁ ) is obtained.

Each time 1 is output to the signal line 303, the value from the main scanning counter 351 is loaded into the latch 307. This value immediately (the next 8 bits are
The data is stored in the clutch 308 before entering 01. First eight
The value from the main scan when the bit white appears appears in latch 30
8, the latch 310 (which is VSYNC
At the time “0”) and the comparator 3
09 is compared. If the data in the latch 308 is larger, the data in the latch 308, ie, the latch 307
Is loaded into the latch 310. At this time, the value of the sub-scanning counter 352 is loaded into the latch 311. In this operation, the next 8 bits are stored in the shift register 301.
Processed before entering. When the data comparison between the latches 308 and 310 is performed for the entire image area in this manner, the maximum value in the document area X direction remains in the latch 310, and the coordinates in the Y direction at this time remain in the latch 311. This is the P ₃ (X ₃ , Y ₃ ) coordinate.

The F / F 312 is an F / F which is set when 8 bits white first appears for each main scanning line, is reset by the horizontal synchronizing signal HSYNC, is set with the first 8 bits white, and is held until the next HSYNC. I do. This F / F31
2 is set, the value of the main scanning counter 351 is set in the latch 313, and the value of the latch 3 is set until the next HSYNC.
Load 14 Then, the magnitude is compared by the latch 315 and the comparator 316. Latch 315 has VSYNC
The maximum value in the X direction is preset at the time of occurrence. If the data in latch 315 is greater than the data in latch 314, signal 317 becomes active and the data in latch 314, ie, latch 313, is loaded into latch 315. This operation is performed between HSYNC and HSYNC. When the comparison operation described above is performed for all image areas, the minimum value of the document coordinates in the X direction remains in the latch 315. This is X _2. Also, when the signal line 317 outputs, the value from the sub-scanning counter 352 is latched.
8 is loaded. This is Y _2.

Each time the 8-bit white appears in the entire image area, the latches 319 and 320 store the main scan counter 3 at that time.
The value of 51 and the value of the sub-scanning counter 352 are loaded.
Therefore, when the original pre-scanning is completed, the count value at the time when 8-bit white finally appears remains in the counter. This is (X ₄ , Y ₄ ).

The above eight latches (306, 311, 3
20, 318, 305, 310, 315, and 319) are connected to the bus line BUS of the CPU in FIG. 5, and the CPU reads this data at the end of the pre-scan.

Then, of these data, X ₂ , X
_3, Y _1, to determine the areas original area of Y _4, and performs at the original scanning for printing the trimming process described above. That is, X ₂ , X ₃ ,
The dotted line by Y _1, Y _4, unrecognized rectangular coordinates surrounding the original position P ₁ to P _4, it can be seen therefore the size of the sheet corresponding thereto is at least necessary.

Accordingly, as a first example, the cassette size data from the printer and the original size data are compared, and the cassette closer to the original size is selected. It depends on the flow of the CPU as shown in FIG. Calculating a distance Δy between the coordinate Y ₄ and Y ₁ (step 1), it compares whether than or less corresponds to the A4 size (step 2), so as to select a smaller case A4 cassette printer A4C data is output to the device (step 3). Large and B4
If the size is smaller than the B4 cassette, the B4 cassette is output (steps 4 and 5). In accordance with these data (via the S.DATA line), the CPU on the printer B side compares the size signals already obtained from the two cassettes with each other, and if there is a corresponding one, feeds the paper from the corresponding cassette. If not, control returns the data to reader A to issue a warning. Reader A displays that effect.
The printer B side feed control of the registration roller 18 so that the leading end of the paper and the coordinate Y ₁ is synchronization is made. In the standard mode, the signal VSYNC from the reader A (the image sensor 37 described above) is output.
While operating the registration roller 18 by b and synchronization), this is done by providing a time corresponding to Y ₁ between the signal from the case as well as the signal and the image tip sensor 37b described above trimming shift. Also, since each cassette is loaded based on the position corresponding to the reference position SP of the reader,
The main scanning direction by X ₁ shifts the image output. This is performed by the method of presetting the read address counter as in the case of the trimming shift. The above-described control mode is selected by a shift key corresponding to the display set by the above-mentioned etcetera key. However, it can also be performed by providing a dedicated key and performing an input operation of the key.

As a second example, by inputting the above-mentioned auto command, this portion can be scaled to a size suitable for the sheet of the cassette and printed. This is because the size signal of the selected cassette of the printer is S.P. Since it is sent to the reader via the DATA line,
With this signal, the desired copy can be obtained by sequentially performing trimming, shifting, and scaling in accordance with the procedure described above with reference to FIGS. That is, the auto 1 obtains the ratios mx and my of the sizes .DELTA.x and .DELTA.y in the X and Y directions of the document with respect to the sizes Px and Py in the X and Y directions of the cassette sheet as shown in FIG. 32 (steps 11 to 14). . The smaller ratio is set as a common magnification for X and Y in the RAM.
(Steps 15 to 17), and the above-described zooming treatment is performed. Therefore, an auto-magnifying copy based on one direction of the sheet is obtained. As shown in FIG. 33, the auto 2 calculates the respective ratios of the original in the X and Y directions with respect to the X and Y directions of the sheet (steps 21, 22, 24 and 25), and calculates the magnification in the X direction.
The magnification in the Y direction is set independently (step 23,
26). Therefore, the original image can be copied to the full sheet. The automatic operations 1 and 2 can be similarly performed in the automatic zooming performed by specifying trimming coordinates.

As a third example, a document tilt warning can be issued.
That is, as shown in FIG. 34, X ₁ and X ₂ of P _{1 to} P ₄ are X ₃ ,
X ₄ is, Y _1, Y ₃ is, Y _2, Y ₄ is (position there is a difference of several bits) each equal to whether the determined (step 31-3
4) If not, a warning display is issued (step 36). However, printing operation is allowed. The above flowchart is a program flow processed by the CPU of the reader.

FIG. 25 is a flowchart showing the procedure of trimming, scaling, and shifting. Only when there is a shift, the treatment was first performed for the points x ₀ and y ₀ (FIG. 2).
3) When there is no shift (movement), as shown in FIG.
_{0 ', y 0' → x} 5, the start bit counter 80 of FIG. 16 by y _5, can be the control of the end-dot counter 81 for trimming the outside white. In this case, since the area that can be trimmed is one area surrounded by a straight line, the area divided into rectangles in the y-axis direction is specified by specifying two diagonal points by xy coordinates. Note that the maximum value is three divisions for the same document. The unit is mm.

That is, (x ₀ y ₀ , x ₁ y ₁ ) + (x ₂ y
_{2, x 3 y 3) +} (x 4 y 4, x 5 y 5) and comprising processing sequentially performed. In the case of manual shift and auto, the coordinates are converted as described above to control the VIDEO output.

Referring to FIG. 16, reference numerals 90 and 91 denote exclusive OR gates for determining an image area. OF denotes a signal for controlling the exclusive area. When the signal is 1, the area determined by the ST counter and the EN counter is masked, and the outside is set as an output image. , 0, the inside of the box is set as an output image and the outside of the box is masked. 92 is an AND gate for controlling the output of the previous image data, 93 is an AND gate for determining whether to output the mask as black or white, and BB is a signal for controlling the mask. When the value is 0, white is output. A VIDEO 95 outputs the image output from the gates 92 and 93.
An OR gate 94 outputs an exclusive OR gate for controlling black and white inversion of the image data. IN is a signal for controlling the image data. Each signal is output after the CPU determines that a masking, white, black, or negative input has been made using the shift key.

That is, in the case of the mask signal 1, the output of the gate 90 at which the Q of the free flow 82 becomes 1 by the ST counter being up becomes 0, and the gate 92 remains until the EN counter is up, that is, until the Q becomes 0. There is no output. That is, it is masked. Instead, since the output of the gate 91 is 1 during that time, when the black / white signal BB is 1, the gate 93 is 1,
Therefore, the image output gate 95 outputs 1 continuously.
That is, it is masked. Conversely, if OF = 1 and BB = 0, white masking is performed. If OF = 0, gates 90 and 9
Since the outputs of 1 are 1 and 0 during that time, black outside trimming is obtained when BB = 1, and white outside trimming is obtained when OFF = 0 and BB = 0.

FIGS. 35 and 36 are an explanatory diagram and a control flow diagram of the CPU for moving a small original or trimmed original to the approximate center of the sheet for printing (centering). That is, as described above, the maximum value and the minimum value (TXMA)
X, TYMAX) and (TXMIN, TYMIN) (1). This can be set by the coordinate detection described above. Next, the magnification in the X and Y directions suitable for the sheet is determined. These are obtained as MX and MY by the method of the subroutine auto AT2 (2). Note that MX, MY can be selected by the numeric keypad as described above to select an arbitrary magnification in the X and Y directions.
Can be determined, or can be determined by the subroutine AT1. Next, the lengths of the sheet in the X and Y directions are set in the RAM as PS · X and PS · Y.
This is determined by the data from the printer (3). Moving coordinates TX for centering using these data
M and TYM are obtained (4). In other words, the scaled width of the trimming width in the X direction is subtracted from the length of the sheet and the result is halved to obtain the X direction coordinate TXM. Similarly Y
The TYM of the direction is obtained. It is considered valid only when TXM and TYM are positive, and a warning is issued when it is negative (5). Thereafter, the method shown in FIGS. 19 to 24 is followed.

FIG. 37 shows (1) XY scaling, (2) white mask, (3) black mask, (4) white frame trimming, (5) black frame trimming, (6) white frame trimming + destination designation + An example of ten-key magnification designation, (7) white frame trimming + centering + ten-key magnification designation, (8) automatic document position detection + origin (SP) movement + automatic scaling (AT2) is shown.

FIGS. 38 and 39 are explanatory diagrams and control flow charts in which the right and left pages are read independently or successively while the book original is opened on the platen and printed on one or two sheets. It is. First, the document is pre-scanned in FIG. 38, and the size (X1, Y1) of the document is determined from the detected coordinates as described above (1). Perform main scan and Y1-
The optical unit is inverted and returned at a coordinate point of 巾 of the Y2 width. That is, the left half is read first, and a half of Y1 is printed out (2). Next, the second main scan is performed in Y
The operation is repeated up to point 2, and the optical system is returned. In this case, the print from 1/2 to Y2 is printed (3).

In the flow of FIG. 39, first, when the book mode is designated by a soft key, a document size detection flag for scanning and detecting the size at the time of input of the copy key is set. Next, it is determined whether the requested copy is left only (1), right only (2), both right and left are printed on one sheet (3), or left and right are sequentially printed separately as shown in FIG. 38 (4). . This is because the CPU determines the input of the soft key. Y for trimming coordinates when left only
MIN is Y1, YMAX is (Y1 + Y2) × 0.5
Is calculated. That is, the center (binding) of the book is obtained (5). Next, the centering is performed (6). Next, the reversal position P of the optical unit is determined as (Y1 + Y2) × 0.5, and a slight margin r is added (7). These data are set in the RAM. The left half image can be printed at the center of the sheet according to the coordinates thus obtained.

In the case of right only, the trimming coordinates YMIN are set to (Y1 + Y2) × 0.5, and YMAX is set to Y2 (8). Next, centering (9) is performed, and inversion P (10)
Ask for.

When the left and right are printed on the same sheet, the coordinates are obtained (11) and the centering (12) is performed in the same manner as the normal trimming of Y1 and Y2, and the inverted P is obtained (13).

When the left and right are sequentially printed on separate sheets, the above-described only-left and right-only cases are sequentially performed to set the data (14). That is, data for two cycles is stored. When the copy key is turned on, it is determined whether or not the mode is the BK mode. When the mode is BK, a pre-scan is performed, and coordinate data is stored according to each mode. Is read from the RAM, and the preset control of the address counter and the sequence control of the scanner are performed to print the first sheet.
When the scan ends and returns to the home position, the CPU (right + left)
It is determined from the RAM data whether or not the mode is still set. In this mode, the right data is read out and the above control is performed to execute the second print.

In the above case, the area other than the original can be made black or white without performing the automatic scaling. In each of the above modes, as described above, the image is reproduced at an appropriate position by delaying or advancing the start timing of the scanner or the registration timing of sheet feeding on the printer side according to the amount of information by centering or the like.

Note that the document coordinates Y1 and Y2 can also be manually input using the numeric keys or size keys. In the main scanning direction, it is also possible to perform only centering based on X1 and X2 obtained by automatic detection and key input.

In this way, the right and left pages of a book can be printed in real time without moving the book by appropriately scaling.
The copying operation can be made extremely easy. In addition, since printing can be performed at the center of the sheet and unnecessary information can be arbitrarily cut, copy quality can be extremely improved. In addition, the printing can be started before the reading by the reader is completed, and the copying speed can be remarkably increased despite the editing. In the transmission mode to another printer, the image data is simultaneously transmitted to the printer attached to the reader under the command control of the CCU, so that the transmission read image can be monitored. In addition, the protocol line and the CPU of the reader are connected and the CPU recognizes the situation of each printer terminal.
Since the image data is transmitted to a plurality of printers including the attached printer by controlling the image quality, the reproduction image quality can be checked without error.

[0084]

As described above, according to the present invention, the image of the designated area is recorded at the center of the recording material regardless of the position of the designated area of the document, so that an easy-to-view image can be obtained.

[Brief description of the drawings]

FIG. 1 is an external view of an image processing apparatus to which the present invention can be applied.

FIG. 2 is a perspective view of a document holder.

FIG. 3 is a cross-sectional view of the image processing apparatus.

FIG. 4 is a plan view of an operation unit.

FIG. 5 is a block diagram illustrating a configuration of an image processing apparatus.

FIG. 6 is a flowchart illustrating a schematic operation of the image processing apparatus.

FIG. 7 is a time chart related to image processing.

FIG. 8 is a time chart relating to image processing.

FIG. 9 is a time chart related to image processing.

FIG. 10 is a block diagram showing details of FIG. 5;

FIG. 11 is a block diagram showing details of FIG. 5;

FIG. 12 is a block diagram showing details of FIG. 5;

FIG. 13 is a block diagram showing details of FIG. 5;

FIG. 14 is an explanatory diagram of seam correction of a CCD.

FIG. 15 is an explanatory diagram of seam correction of a CCD.

FIG. 16 is a block diagram showing details of FIG. 5;

FIG. 17 is a diagram showing main and sub-scanning of the CCD.

FIG. 18 is a diagram illustrating main / sub scanning of the printer unit.

FIG. 19 is an explanatory diagram of image editing.

FIG. 20 is a time chart in the block diagram of FIG. 16;

FIG. 21 is an explanatory diagram of image editing.

FIG. 22 is an explanatory diagram of image editing.

FIG. 23 is a flowchart of an image editing process.

FIG. 24 is a flowchart of an image editing process.

FIG. 25 is an explanatory diagram of image editing.

FIG. 26 is a diagram showing an example of image editing.

FIG. 27 is a diagram showing an example of image editing.

FIG. 28 is a diagram showing an example of image editing.

FIG. 29 is a diagram illustrating the recognition of the coordinates of the document placement area.

FIG. 30 is a circuit diagram for coordinate recognition.

FIG. 31 is a flowchart of a cassette selection process.

FIG. 32 is a flowchart of a magnification selection process.

FIG. 33 is a flowchart of a magnification selection process.

FIG. 34 is a flowchart of document inclination detection.

FIG. 35 is an explanatory diagram of centering.

FIG. 36 is a flowchart of a centering process.

FIG. 37 is a diagram showing an example of image editing.

FIG. 38 is an explanatory diagram of a book mode.

FIG. 39 is a flowchart of book mode processing.

[Explanation of symbols]

 A reader unit B printer unit A-1 operation unit

Continuation of the front page (72) Inventor Shinobu Arimoto 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yoshiyuki Suzuki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-55-40460 (JP, A) JP-A-57-78527 (JP, A) JP-A-56-64561 (JP, A)

Claims (2)

(57) [Claims] And 1. A platen on which an original is placed, a scanning means for scanning a document placed on the document table, a region designation means for designating a desired area of the document, scanning the front Symbol scanning means recording means for serial <br/> recorded on a recording medium the images of the document, the vertical and horizontal direction of the region specified by the region specifying means
According to the leading and trailing edge positions in the
The vertical edge of the recording material and the designation formed on the recording material
The distance between the region and the vertical end of the image is
Measure the length from the leading edge to the trailing edge of the document
Half of the value subtracted from the length of the direction, and
The horizontal edge of the recording material and the designated area formed on the recording material
The distance from the horizontal edge of the image is
Measure the length from the leading edge position to the trailing edge position in the horizontal direction of the recording material.
The amount of movement of the image that is half of the value subtracted from the
Is determined, and the image of the document is recorded based on the determined movement amount.
An image processing apparatus , comprising: control means for recording at the center of a recording material . 2. The control device according to claim 1, wherein the control unit includes a designated area in a vertical direction.
Length from the leading edge to the trailing edge of the recording material
The value subtracted from the length or the specified area in the horizontal direction
Measure the length from the leading edge position to the trailing edge position in the horizontal direction of the recording material.
If the subtracted value is negative, a warning is issued.
The image processing apparatus according to claim 1, wherein: