JP2898972B2 - Image reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]   The present invention provides an image sensor comprising a plurality of elements.
And an image reading apparatus having a reading means comprising a sensor.
Things. [Prior art]   Conventional image sensor used for image reading
Is a silicon crystal type such as CCD and bipolar type, and cd
There are thin film types such as s, amorphous silicon, etc.
There were a reduced type and an equal size type. Meanwhile, color image reading
The configuration of the color separation system is a single image sensor
To switch light source or color filter
There is a simultaneous reading color separation method that does not switch with the above.   As the simultaneous reading color separation method,
System with multiple sensors in parallel and one-line image
Configure a stripe type filter on the image sensor.
There is a method of reading out the color separation signal in a time-division manner. Image reading
Read as a high-speed type from the required performance of the
The same reading as a thin film type with high speed and a high sensitivity type
In the case of resolution, a 1 × type that can take a wide light receiving area is suitable
I have. Here, in the case of a color image reading apparatus,
Reduction of incident light quantity by solution filter and image sensor
-High sensitivity type is required due to its own spectral sensitivity characteristics,
To achieve high-speed reading using a light source within the practical range
Has a 1x silicon crystal stripe filter
Is suitable. But silicon crystal type
In the case of A4, 297mm of A4 longitudinal width is covered due to manufacturing restrictions.
It is difficult to make a long type with a single chip
Multiple lines as one-line sensor by physical arrangement
Structured components have recently emerged for high-speed reading. [problem]   However, when multiple image sensors are
When connected to a book, for example, with a reading resolution of 16 dots / mm
Color separation of blue (B), green (G), red (R)
When a stripe filter is configured,
1 / 16mm x 1/3 = 20.8μm, but each image sensor
The positioning accuracy between
No problem with positioning accuracy, higher resolution is possible
Is caused by the non-uniformity of the characteristics between each image sensor.
Difference in reading density between image sensor chips, especially
Color shift between image sensor channels
It becomes a problem. Density shift and color between image sensor chips
The causes of deviation are 1) Image sensor chip
Sensitivity, dark current output variation, 2) chip or
Indicates that the characteristic variation of the signal processing circuit for each color filter is high.
I can do it.   Conventionally, digital signal
Was known to be addressed by correcting
In such digital processing, digital signals are converted from analog signals.
Correction within the quantization step range when converting to
The quantization error in the transformation.
Could not make the necessary adjustments.   The present invention has been made in view of such circumstances,
Multiple image sensors composed of multiple elements
When reading an image using the color reading means provided,
Good in consideration of quantization error in conversion to digital signal
Color image reading device that can perform various offset processing
The purpose is to provide a device. [Means and actions to solve the problem]   In order to achieve the above object, the present invention provides
Reading means comprising a plurality of image sensors comprising
And an analog image signal read by the reading means.
Offset processing means for performing offset processing on signals
And a digital signal for the output signal of the offset processing means.
Conversion means for performing a conversion process to a video signal,
Analog image signal before conversion and the conversion means
Off based on both digital signals output from
Control means for controlling the offset amount in the set processing means
And an offset processing means for each image.
Parallel processing is possible by providing multiple sensors.
And converting the plurality of offsets into
It is characterized in that it is common to processing means. 〔Example〕   Hereinafter, the present invention will be described in detail with reference to the drawings.   FIG. 1 shows a digital color image processing system according to the present invention.
1 shows an example of a schematic internal configuration of a system. This system is
Digital color image reading device (hereinafter, referred to as
1) and a digital color image at the bottom
An image printing device (hereinafter, referred to as a color putter) 2
Having. This color reader 1 is provided with a color separation unit described later.
The color image information of the original is
Information in color and converted to electrical digital image signals.
Replace. In addition, the color printer 2 uses the digital image
The color image is reproduced for each color according to the signal,
To transfer and record multiple times in digital dot form
It is a laser beam color printer of the child photograph type.   First, an outline of the color reader 1 will be described.   3 is an original, 4 is a platen glass on which the original is placed, 5 is
From the original scanned and exposed by the halogen exposure lamp 10.
Condenses the reflected light image and enters the image into the 1: 1 full-color sensor 6
A rod array lens for power, and 5,6,7,10 are originals
Exposure scan in the direction of arrow A1 as one unit as scanning unit 11
Check. The camera read line by line during exposure scanning
The color separation image signal is sent to the sensor output signal amplification circuit 7.
After being further amplified to a predetermined voltage, a signal line 501 will be described later.
And input to a video processing unit for signal processing. Details
Will be described later. 501 to ensure the faithful transmission of signals
It is a coaxial cable. Signal 502 is a 1 × full color sensor
A signal line for supplying a drive pulse for the
The pulses are all generated within the video processing unit 12. 8,
Reference numeral 9 denotes a white level correction and a black level correction of an image signal described later.
White and black plates.
Irradiation gives a signal level of a given density
Video signal white level correction, black level correction
Used for 13 is a controller with a micro computer
Roll unit, which is operated by bus 508
Display, key input control, and video processing unit in console 20
The scanning of the original by the position sensors S1 and S2.
The position of nit 11 is detected via signal lines 509 and 510, and
Stepping for moving the scanning body 11 by the line 503
Stepping motor drive to pulse drive motor 14
Circuit control, exposure lamp driver via signal line 504
ON / OFF control, light intensity control, signal
Digitizer 16 and internal keys via line 505, display
All controls of the color reader unit 1 such as control of the unit
You. At the time of document exposure scanning, the exposure scanning unit 11 described above is used.
The color image signal read by the
The video processing unit 12 is input to the
Various processing described later is performed in the
It is sent to the printer unit 2 via the source circuit 56.   Next, an outline of the color printer 2 will be described. 711
The image signal from the color reader 1
Laser output part to convert the signal into a polyhedron (for example, octahedron)
Potagon mirror 712, motor that rotates this mirror 712
(Not shown) and f / θ lens (imaging lens) 713
I do. 714 is a reflecting mirror that changes the optical path of laser light, 715
Denotes a photosensitive drum. Laser emitted from laser output unit
The light is reflected by the polygon mirror 712,
Scans the surface of the photosensitive drum 715 linearly
To form a latent image corresponding to the original image.
You.   Also, 717 is a primary charger, 718 is an overall exposure lamp, 723
Is a cleaner section for collecting the residual toner not transferred,
724 is a pre-transfer charger, and these members are the photosensitive drum 7
It is located around 15.   726 is formed on the surface of the photosensitive drum 715 by laser exposure.
A developing unit that develops the formed electrostatic latent image.
1Y, 731M, 731C, 731Bk are developed directly in contact with the photosensitive drum 715
730Y, 730M, 730C, 730Bk are spare toner
732 is the toner hopper that keeps the
Skewers that do these sleeves 731Y-73
1Bk, toner hopper 730Y ~ 730Bk and screw 732
Forms a developing unit 726.
It is arranged around the rotation axis P of the imager unit. example
For example, when forming a yellow toner image,
Develops yellow toner and forms magenta toner image
The developer unit 726 around the axis P in the figure.
The magenta developer in the position in contact with the photoconductor 715.
The image sleeve 731M is provided. Development of cyan and black
Operates similarly.   Reference numeral 716 denotes a toner image formed on the photosensitive drum 715.
719 is a transfer drum for transferring to paper, and 719 is a transfer drum 716.
Actuator plate for detecting the movement position of the 720
When the actuator comes close to the actuator plate 719, the transfer
Detects that the ram 716 has moved to the home position
Position sensor, 725 is transfer drum cleaner, 727
Is a paper holding roller, 728 is a static eliminator, and 729 is a transfer charger.
Yes, these members 719, 720, 725, 727, 729
It is located around 16.   On the other hand, 735 and 736 are paper cassettes for storing paper (sheets).
737, 738 are for feeding paper from cassettes 735, 736.
Paper rollers, 739, 740, 741 timing for paper feed and transport
Timing roller that feeds paper through these
The conveyed paper is guided by the paper guide 749 and the leading end is described later.
Wrapping around the transfer drum 716 while being carried by the gripper,
The process proceeds to the image forming process.   Reference numeral 550 denotes a drum rotation motor which rotates with the photosensitive drum 715.
The photo drum 716 is rotated synchronously. 750 completes image formation process
Later, the peeling claw that removes the paper from the transfer drum 716, 742
Conveyor belt for transporting removed paper, 743 for transport
Image fixing unit that fixes paper conveyed by belt 742
The image fixing unit 743 includes a pair of heat pressure rollers 744 and 74.
With 5.   First, according to FIG.
The control unit 13 will be described. (Control section)   The control part is CPU22 which is a micro computer
And a line for video signal processing control, exposure and scanning.
Driver 21, stepping motor driver 15,
The control of the digitizer 16 and the operation panel 20 is controlled by a signal line 508, respectively.
(Bus), 504, 503, 505, etc. to obtain the desired copy
Organic control according to program ROM23, RAM24, RAM25
I do. The nonvolatile nature of the RAM 25 is guaranteed by the battery 31.
You. 505 is a commonly used signal line for serial communication.
Digitizer according to protocol between PU22 and digitizer 16
The operator inputs from -16. In other words, 505 is for manuscript editing
For example, coordinates for moving, combining, etc., area designation, copy mode finger
Signal line for inputting an instruction for changing the magnification, a magnification change instruction, or the like. Signal line 503
Is the scanning speed, distance,
This is a signal line for instructing forward and backward movements.
The motor 15 is connected to the stepping motor 14 according to an instruction from the CPU 22.
On the other hand, a predetermined pulse is input to give a motor rotation operation.
Serial I / Fs 29 and 30 are serial interfaces such as Intel 8251.
It is a general thing realized by LSI for Al I / F, etc.
No, but the same applies to digitizer 16 and motor driver 15.
Circuit. Between CPU 22 and motor driver 15
FIG. 3 shows the protocol of the interface.   S1 and S2 are the positions of the original exposure scanning unit (Fig. 11).
Sensor for position detection, home position position in S1
Where white level correction of the image signal is performed.
Done. S2 has an original exposure scanning unit at the top of the image
This position is the reference position of the document.
Becomes (Printer interface)   Signals ITOP, BD, VCLK, VIDEO, HSYNC, SRCOM in FIG.
(511 to 516) are the color printer units 2 in FIG.
This is an interface signal between the communication unit 1 and the reader unit 1.
All image signals VIDEO514 read by reader unit 1 are
The signal is sent to the color printer unit 2 based on the signal. ITOP
Is a synchronization signal in the image feed direction (hereinafter referred to as the sub-scanning direction)
Yes, once per screen, ie, four colors (yellow,
Once for each of the four images, one for each of the images
Occurs on the transfer drum 716 of the color printer unit 2.
The leading edge of the transfer paper wound around
When receiving the toner image transfer at the contact point,
Transfer drum 716, photosensitive drum 71 to match the image and position
Synchronized with the rotation of 5, the video processing unit in Reader 1
Sent to the CPU and further interrupted by the CPU 22 in the controller 13.
(Signal 511). CPU22 generates ITOP interrupt
Image control in the sub-scanning direction for editing or the like is performed based on the reference.
BD512 is rotated once per rotation of polygon mirror 712, ie, 1
Raster scan direction that occurs once in raster scan
(Hereinafter referred to as a main scanning direction).
The image signal read by the reader unit 1 is one line in the main scanning direction.
The data is sent out to the printer unit 2 in synchronization with the BD. VCLK
513 color-prints 8-bit digital video signal 514
This is a synchronous clock to be sent to the data
As shown in FIG. (B), video is transmitted through flip-flops 32 and 35.
The data 514 is transmitted. HSYNC515 is VCLK from BD signal 512
Made in sync with 513. The main scanning direction synchronization signal
Has the same period as BD, and the VIDEO signal 514 is strictly HSYN
Sent in synchronization with C515. This is the BD signal 515
Polygon mirror is generated in synchronization with the rotation of the mirror
Includes a lot of motor jitter to rotate the 712,
If you synchronize it to the issue as it is, image jitter will occur, so BD
Generated in synchronization with jitter-free VCLK based on the signal
This is because HSYNC515 is required. SRCOM is half duplex bidirectional
This is a signal line for serial communication, and is shown in FIG. 4 (C).
Synchronization signal CBUSY (command
Synchronous to the 8-bit serial clock SCLK during
Command CM is sent, and the printer
8-bit serial clock between USY (status busy)
Status ST is returned in synchronization with the lock. This timing
In the chart, the status “3CH” is responded to the command “8EH”.
Indicates that the printer unit was returned from the reader unit.
Instructions such as color mode, cassette selection,
Status information, such as jam, no paper, weight, etc.
All information exchanges are performed via this communication line SRCOM
Done.   Fig. 4 (a) shows one four-color full-color image as ITOP and
The timing chart for transmitting based on HSYNC is shown. ITO
P511 is generated once for one rotation or two rotations of the transfer drum 716
Then in a yellow image, in a magenta image, in
For cyan images, Bk image data is
Sent to the linter unit 2 and a full-color image composed of four colors
An image is formed on the transfer paper. HSYNC is for example A3 image length
420mm in the direction and the image density in the feed direction is 16pel / mm
And 420 × 16 = 6720 times, this is simultaneous
Clock to the timer circuit 28 in the controller circuit 13
Input to the input, which after a predetermined number of counts,
HINT517 is interrupted to CPU22. this
CPU 22 controls the image in the feed direction, for example,
Controls movement and the like. (Video processing unit)   Next, the video processing unit 12 will be described according to FIG.
It will be described in detail. The original is first exposed to an exposure lamp 10 (Fig. 1, 2
(Refer to Fig.)
-The image is read after being color-separated for each image by the reading sensor 6.
Then, the signal is amplified by the amplifier circuit 42 to a predetermined level. 41 is mosquito
Supply pulse signal to drive color reading sensor
The required pulse source is the system driver.
It is generated by the control pulse generator 57. Fig. 6
Shows a color reading sensor and a driving pulse. Fig. 6
(A) is a color reading sensor used in this example.
62.5 μm
(1 / 16mm) as one pixel, 976 pixels, as shown in the figure
Since one pixel is divided into G, B, and R in the main scanning direction,
1024 × 3 = 3072 effective pixels. Meanwhile, each
Chips 58 to 62 are formed on the same ceramic substrate, and
The 1st, 3rd, 5th (58, 60, 62) are on the same line LA, 2nd, 4th
Eyes are LA only for 4 lines (62.5μm × 4 = 250μm)
It is placed on a separate line LB, and when reading the original, the arrow
Scan in the AL direction. Each of the five CCDs and the first, third and fifth
ODRV518, the second and fourth EDRV519
They are driven independently and synchronously. Included in ODRV518
O01A, O02A, ORS and E01A, E02A, ERS included in EDRV519 are
Charge transfer clock and charge reset in each sensor
Pulse and the mutual interference between the 1,3,5th and 2,4th and noise
Due to the restrictions on the communication,
Generated. Therefore, these pulses are one reference launch source
Generated from OSC 58 '(FIG. 5). Fig. 7 (a) shows ODR
FIG. 7 (b) is a circuit block diagram for generating V518 and EDRV519.
This is a timing chart.
It is included in the Lupax generator 57. A single OSC58 '
Clock K0 535 obtained by dividing the original clock OLK0 generated
Is the reference signal SYNC2, which determines the ODRV and EDRV generation timing.
SYNC3 is a clock that generates SYNC3, and SYNC2 and SYNC3 are CPU
Presetter set by the signal line 539 connected to the
Output timing according to the set value of the
SYNC2 and SYNC3 are divided by dividers 66 and 67 and drive pulse generators.
The components 68 and 69 are initialized. That is, the input to this block
All output from one oscillation source OSC based on HSYNC515
CLK0 and the divided clock that are all generated synchronously
ODRV518 and EDRV519
These pulse groups are obtained as a synchronized signal without any jitter.
Therefore, signal disturbance due to interference between sensors can be prevented.
Here, the sensor drive pulse OD obtained in synchronization with each other
RV518 is the 1st, 3rd and 5th sensors, and EDRV519 is the 2nd and 4th sensors.
To the drive pulse from each sensor 58, 59, 60, 61, 62
The video signals V1 to V5 are output independently in synchronization with each other.
The predetermined amplification is performed by the independent amplifier circuit 42 for each channel indicated by
Amplified to a voltage value and passed through a coaxial cable 501 (Fig. 1)
V1, V3, V5 or EOS5 at the timing of OOS529 in FIG.
At timing 34, V2 and V4 signals are sent out and the video processing unit
Entered in the nit.   The original input to the video processing unit 12 is moved in the main scanning direction.
The color image signal obtained by reading the image by dividing it into five parts is
G (green), B (bull) at sample hold circuit S / H43
-), R (red) is separated into three colors. So S / H
After that, 3 × 5 = 15 signal processing systems. Fig. 8
The color image signal for one channel input to (b) is
After sample-hold processing and amplification, the A / D conversion
Multiplexed digital data A /
The timing chart obtained from Dout is shown. Fig. 8
(A) and (b) show the processing block diagrams.   Read from the 5-chip equal-size color sensor described above.
The analog color image signal that has been
Input to the analog color signal processing circuit of FIG.
Is done. Circuits A to E corresponding to each channel are the same circuit
Therefore, the processing block shown in FIG.
According to the figure, together with the timing chart of FIG. 8 (c)
explain.   The input analog color image signal is shown in FIG.
The order is G → B → R like GA, and there are 3072 pixels
In addition to the effective pixels, a 12-pixel color sensor
Empty transfer section not connected to photodiode, then 24 pixels
Dark output section shielded with Al on the photodiode of
Cal black), after 36 dummy pixels and effective pixels
A total of 3156 pixels consisting of 24 dummy pixels
The position and the signal (FIG. 8 (d)).   The analog color image signal SiGA is input to the amplifier 250.
The composite signal is amplified to the specified signal output as it is.
Analog color with DC level fluctuation at the same time as AC
The DC level fluctuation of the image signal SiGA is removed, and the
Feed bar to fix the DC level of SiGA at the appropriate operating point
Zero level clamped by the hook clamp circuit 251
You. The feedback clamp circuit 251 is connected to the S / H circuit 251b.
It consists of a comparison amplifier 251a,
The dark output section of the analog color image signal SiGA (optional)
The output level of the teikal black) is controlled by the S / H circuit 251b.
Is detected and input to the minus input of the comparison amplifier 251a.
Reference voltage Ref1 (Ref1 = GND in this embodiment).
The difference is fed back to the amplifier 250 and amplified.
The dark output part of the output of the detector 250 is always fixed to the reference voltage Ref1.
You. Where the DK signal is the darkness of the analog color image signal SiGA
This signal indicates the section of the power section and is supplied to the S / H circuit 251b.
The DC level of the dark output section of the SiGA can be
Detect once in (1H).   Next, the output signal of the amplifier 250 is G,
Color separation into B and R, suitable for dynamic range of A / D conversion circuit
Are amplified so that they match, but the same process is performed for each color.
In the specification, the B signal will be described.
And represent other G and R signals. Well, amplifier 2
The 50 composite output signals are passed through buffer circuit 252 to S
/ H circuit 253 outputs the composite signal according to the SHG signal.
Only the pixel output corresponding to the B signal is sampled.
Good. The separated B signal 538 is amplified by the amplifiers 254 and 255.
The width is input to the low-pass filter (L.P.F) 256. B
-The pass filter 256 contains the S / H output signal generated by the S / H circuit 253.
Frequency components of the sampling pulse
Only the change in the coupled S / H output signal is extracted.
That is, if the driving frequency of the CCD is fD, the S / H circuit 253
Each color signal is frequency fD
/ 3 discrete signals. Therefore, the cut-off frequency fc
= (FD / 3) × 1/2 = constructs a Nyquist filter of fD / 6
As a result, the above effect is obtained, and
Is extracted, and the frequency bandwidth of the subsequent signal processing system is
It is possible to keep it low.   Only the signal components are extracted by the low-pass filter 256.
The chrominance signal is amplified by an amplifier 257, a multiplier 258 and a buffer amplifier.
Adjustment by CPU control by the heater 259 (FIG. 8 (e)
G characteristic) and multiplier 260, feedback
Feedback clamp composed of ramp circuit 261
Each color signal whose gain has been adjusted by the
To clamp. The operation is a feedback clamp circuit 25
Same as 1. The multiplier 258 in this embodiment is shown in FIG.
As shown in the figure, a multiplier using a multiplying DAC
Therefore, the multiplying DAC 251 and the operational amplifier 522
It consists of a switch 523, and the output Vout is Vout = −V_{IN / N}                          0 <N <1   Where N is the binary fraction of the input digital code
It is. Basic multiplying DAC circuit is opian
Analog potentiometer with no load
In this circuit, in the same sense as being similar,
Similar to a follower with a trim circuit connected to a hook circuit
is there. Therefore, in the channel connection correction described later,
Image data when the scanning unit reads a uniform white plate
The internal latch 523 via the data bus of CPU22.
To the level determined by the digital data
I do. FIG. 52 (b) shows a code table. Ratch 523 is C
Allocated as PU22 I / O, ▲ ▼, SEL control line
Set more data.   Next, from the multiplier 260 and the feedback clamp circuit 261
The structure of the feedback clamp system
You. This feedback clamp system is
It has almost the same configuration as the hook clamp circuit 251.
Feedback circuit consisting of / H circuit 261b and comparison amplifier 261a
The CPU-controlled multiplier 260 is added to the reference voltage Ref2 of the clamp circuit.
Connected and read in the channel connection correction described later.
CPU22 to shift the level of the black level image signal
Data set on the internal latch 537 via the data bus 508
At the level determined by the digital data.
The reference voltage Ref2, and the above-described amplifier 257, multiplier
258, each color signal amplified by the buffer amplifier 259
Clamp to the level of the reference voltage Ref2. Ratchet 537 is C
Allocated as PU22 I / O and de-selected by WR and SEL control lines.
Set the data.   The multiplier 260 is a multi-line as shown in FIG.
DAC531 and operational amplifiers 532,533, resistance 534,535 with resistance R
And all 4 quadrant modes composed of a resistor 536 with a resistance value of 2R
Multiplier of 8bit digital set by CPU
According to the data, a bipolar voltage is output as shown in Fig. 53 (b).
Power.   Now, amplify to predetermined white level and black level and DC clamp
The color signals 541 (G), 542 (B) and 543 (R) are
And multiplexing into one signal.
With MPX260 by Spulse GSEL, BSEL, RSEL (544-546)
One system, input to A / D conversion circuit 45, A / D clock
A / D conversion is performed by the 547 and converted to digital data ADOUT548.
Output. In this configuration, multiplexed with MPX260
After A / D conversion, G.B.R. 3 colors, 5 channels each, total 15 systems
The color signals are converted by five A / D converters. BE circuit
Is the same as above.   Next, in this embodiment, four lines (62.5 μ
m × 4 = 250 μm) in the sub-scanning direction
Original with 5 staggered sensors divided into 5 areas in the scanning direction
As shown in FIG. 9 (a), since reading is being performed.
In channels 2 and 4 that scan ahead,
The position to remove is off. So in order to connect this correctly
In this case, a memory for a plurality of lines is used. Fig. 9
(B) shows the memory configuration of the present embodiment, and 70 to 74 are each
Memory with multiple lines and a FiFo configuration
ing. In other words, 70, 72, 74 are 5 lines as 1024 pixels per line.
In, 71 and 73 have a capacity of 15 lines,
One line from the point indicated by the WPO75 and WPE76
Data is written, and writing for one line is completed.
Upon completion, WPO or WPE is incremented by one. WPO75 is Jianne
WPE76 is common to 2,4.   OWRST540 and EWRST541 are each line pointer WPO7
5, This signal initializes the value of WPE76 and returns it to the beginning.
42, ERST543 is a read pointer (pointer for reading)
Is a signal for returning the value of. Now, channel 1 and 2
An example will be described. Channel as shown in Fig. 9 (a)
2 is ahead of channel 1 by 4 lines.
Channel 2 reads one line, for example a line
4 lines after writing to embedded FiFo memory 71
First, channel 1 reads the line. So to memory
Advance WPE by 4 ahead of write pointer WPO
And the same read port when reading from FiFo memory respectively.
When read with int value, channel 1,3,5 and channel
For lines 2 and 4, the same line is read, and the deviation in the sub-scanning direction is compensated.
It will be corrected. For example, in FIG.
Indicates that the WPO has a WPO in the first line 1 of the memory,
For channel 2, the WPE points to 5 on the fifth line from the top
You. Starting from this point, when WPO shows 5, W
PE indicates 9 and both pointers are in the area of 5
The line is written, and then RPO, RPE (lead point
Read out cyclically while proceeding
I should go. FIG. 9 (c) shows the control for performing the control described above.
This is a timing chart, and the image data is
It is sent one line at a time. EWRST541, OWRST540
Is generated with a shift of 4 lines as shown in the figure.
2 is equivalent to the capacity of FiFo memory 70, 72, 74, therefore 5 lines
ERST543 is generated every 15 lines for similar reasons
You. On the other hand, at the time of reading, the speed is 5 times faster than that of channel 1.
For one line, then one line from channel 2
Minutes, then 3 channels, 4 channels, 5 channels
Next read, one channel from 1 to 5 during 1HSYNC
A long signal can be obtained. Fig. 9 (d) 1RD-5
RD (544 to 548) is the effective area of the read operation of each channel.
FIG. Note that this FiFo memory
The control signal for image connection control between channels is shown in FIG.
It is generated by the memory control circuit 57 '. The circuit 57 '
Although it is composed of a discrete circuit, it is the gist of the present invention.
The explanation is omitted here. In addition, the memory
Is the blue, green, and red components of the image
It has the same structure, but the explanation is one color
Only for a minute.   FIG. 10 (a) shows a black correction circuit. As shown in Fig. 10 (b)
The black level outputs of channels 1 to 5 are input to the sensor
When the amount of light is very small, the variation between chips and between pixels is large.
No. When this is output as is and the image is output, the image
Streaks and unevenness occur in the data part. Therefore, the output bar
It is necessary to compensate for the variation, and a circuit as shown in Fig. 10 (a)
Perform correction with. Document scanning unit prior to copy operation
Has a uniform density located in the non-image area at the end of the platen.
Move to the position of the black plate to be turned
An image signal is input to the circuit. This image data is one line
In order to be stored in the black level RAM 78,
Select A (), close gate 80 () and open 81. Immediately
That is, the data line is connected to 551 → 552 → 553, while the RAM
Address initialized with ▲ ▼ for dress input
The output of counter 84 is output to be
The black level signal for IN is stored in the RAM 78.
Black reference value capture mode).   However, the black level data captured in this way is
Because it is a very small level, it is generated in the analog video processing circuit.
Generated or radiated from outside via various wirings
To be greatly affected by the noise entering
Using the previous data as black correction data,
This is undesirable because the noise is noisy. There
Then, the black level captured in the black level RAM 78 shown in FIG.
The performance shown in the flowchart of Fig. 10 (d) is shown in the level data.
Adds arithmetic processing to remove the effects of noise. FIG. 10 (c),
Bi in (d) is the address of the black level RAM 78, and (Bi) is
Shows the data in the address of. I is, for example, the main scan
16x29 at 16pel / mm if it has width in direction A4 longitudinal direction
7mm = 4752 pixels / each color, but covers the length
Therefore, if we arrange five 61mm CCD chips and make them 1ine,
16 × 61 mm × 5 = 4880 pixels / i = 1 to 4880 corresponding to each color
Can take the value of   First, it is taken into the black level RAM 78 of (1) in FIG. 10 (c).
Black level data is stored in address B_ijTo B_{i + j}Until CPU2
Close gate 80 for latches 85,.
And then select selectors 82 and 83 to access the CPU
Read 22 work registers (in RAM 24) as shown in (3).
Is executed. Then B_ijTo B_{i + j}Black level data up to
(B_ij) …… (B_{i + j}) And add 2_{j + 1}Divided by
At the address Mi of the working RAM 24 as the value of the central pixel Bi
Is written. Thus, ｛(B₁) + …… + (B_{j + 1}) +
…… + (B_{2j + 1})｝ = (M_{j + 1}) To ｛(B_4880-2j) + ...
+ (B_4880-j) + ... + (B₄₈₈₀)｝ = (M_4880-jUntil)
And the center pixel Bi is the neighborhood B_ijTo B_{i + j}Average value up to
Is written in the RAM 24 as shown in (4). Finally i =
From 1 to i = j, i = j + 1 data, i = 4880−j + 1
From i to 4880, data of i = 4880-j was written.
Note that i = 1 to i = j and i = 4880−j + 1 to i = 48
Pixels up to 80 are in the range of invalid pixels at both ends of the sensor.
In the embodiment, j = 48. ). Next, M in RAM24
_{j + i}To M_4880-jThe data up to B is the B level of the black level RAM 78 again._{j + i}
To M_4880-jBlack level with no noise
Data is set. For the blue component of the color component image
And when finished (Fig. 10 (d) StepB)
G signal of component (StepG), R signal of red component (StepR)
Is calculated in the neighborhood. In this embodiment, the center pixel and the neighboring image are used.
The prime was an unweighted operation, but with different coefficients
Calculation by weighting is also possible.   When reading images, RAM78 is in data read mode
To the B input of the subtractor 79 via the data line 553 → 557
The data is read and input for each line and for each pixel. That is, this
When the gate 81 is closed (), 80 is open (). Therefore, black
The correction circuit output 556 is an example of the black level data DK (i).
For example, in the case of a blue signal, Bin (i) −DK (i) = Bout
(I) (black correction mode). Gree as well
Gin and Red Rin are also controlled by 77G and 77R.
You. In addition, the control line of each selector gate for this control,
,, Are allocated as CPU (Figure 22) I / O
This is performed under the control of the CPU by the latch 85.   Next, in FIG. 11-1, white level correction (shading compensation) is performed.
Correct) will be described. White level correction equalizes the original scanning unit.
White data when illuminated by moving to the position of a uniform white plate
Correction of sensitivity variation of illumination system, optical system and sensor based on
I do. The basic circuit configuration is shown in FIG.
The basic circuit configuration is shown in FIG. Basic
The circuit configuration is the same as that in FIG.
Multiplier was used in white correction, while correction was performed in calculator 79.
The only difference is that the unit 79 'is used.
Akira is omitted. During color correction, first make the original scanning unit white
When the color plate is at the position (home position),
Prior to writing or reading operation, turn on the exposure lamp,
One line of correction RAM 78 'for image data of uniform white level
To be stored. For example, having a width in the main scanning direction A4 longitudinal direction
If it is, 16pel / mm and 16x297mm = 4752 pixels, but CCD
If one chip of image data is composed of 976 pixels, 976x
5 = 4880 pixels, that is, at least the RAM capacity is 4880
There is a byte, as shown in FIG. 11-1 (b).
Assuming that the color plate data Wi (i = 1 to 4880), the RAM 78 'has the first
1 As shown in Fig. (C), data for the white plate for each pixel
Is stored. On the other hand, for Wi, the normal image of the i-th pixel
Data Do = Di x FF after correction for the read value Di of_H/ Wi and
Should be. Therefore, the CPU in the controller (Fig. 2
2) According to Latch 85 '', ',', '
Close port 80 ', open 81', and further select selectors 82 ', 8
At 3 ', output is made so that B is selected.
Be possible. Next, the first pixel W₁Against FF_H/ W₁, W_TwoTo
FF / W_Two.. Are sequentially replaced to replace data. Color components
When finished for the blue component of the image (Fig. 11-1 (d)
Step B) Similarly, the green component (Step G) and the red component (St
epR) in sequence, and
Do = Di × FF_HGate 80 'opens to output / Wi
('), 81' are closed (') and A is selected as selector 83'.
Selected as coefficient data FF read from RAM 78 '._H/ Wi is
Original image data input from one side through signal line 553 → 557
The result is multiplied by the data 551 and output.   Next, each of the chips 58 to 62 of the color CCD 6 processes the original of the same density.
A character for processing as an equal digital value when read
Regarding the channel connection correction, FIGS. 11-2 (a) and (b)
This will be described with reference to a flowchart. First, channel connection
To perform the black level processing of the b signal in the black level processing (St
epD-B), the step of black level processing of the first B signal of CH1
In D-B1, the CPU 22 sets the B1 signal offset of CH1 as a reference level.
D through the data bus 508₁(In this example, 80
H) to the latch 537 in the multiplication circuit 260, and
The data of the line D / A531 is set (Step 1). this
In the same state, the black level signal of the black
It is stored in the level RAM 78 (Step 2). Fig. 11-2 (c)
This shows the black level data of the RAM 78. Next, the value of the counter i is
Or the tempo for storing the minimum value in the CPU working RAM 24
Rally memory address M₁To FF_HIs set (Step 3).
Next, the data (Bi) in the black level RAM 78 and M₁data from
(M₁) And (Bi) becomes (M₁) If smaller than M₁No
Data (M₁) Is (Bi) and Bi is B₁To B₉₇₆Repeat until
(Steps 4, 5, 6). As a result M₁Is the minimum value in CH1
Will be delivered. Then M₁Is the black level reference value
D_Two(In this example, 08_H) Is determined to be equal or not (S
tep7), if not, judge the size (Step8), M₁Is D_TwoLess than
If so, CPU22 is D_{1 + α}The latch 537 in the multiplication circuit 260
And increase the offset level (Step 9) and Step 3
Return to Step 7 again (M₁) = D_TwoIs determined. In Step8
(M₁)> D_TwoIn case of CPU22 is D_1-αIn the multiplication circuit 260
Set to switch 537 and lower the offset level (Step1
0), return to Step 3 and repeat in Step 7 (M₁) = D₁Is determined.   As above (M₁) = D₁CPU is multi
Data D for Pricing D / A531_{1 ± α}Variable and achieved
Moves from Step 7 to Step D−B2 and sets the counter value to 977.
To the CH2 in the black level RAM 78 and CH1 of Step D-B1
Perform the same process and set the minimum value to D_TwoTo Next, StepD−B3, D
−B4 and D−B5 denote the minimum values of CH3, CH4, and CH5 respectively._TwoToss
You. The above processing is performed with the G signal in Step DG and the R signal in Step DR.
Signal CH2, CH3, CH4, CH5, and all minimum values are D_TwoToss
You. Next, the white level of the B signal is
First, the white signal of CH1 B signal is
In step W-B1 of the level processing, the CPU 22 sets the B signal gain of CH1.
D through data bus 508 to set to reference level_Three(The real truth
In the embodiment, AOH) is set in the latch 523 in the multiplication circuit 258.
And set the data of the multiplying D / A521 (St
ep11). In this state, the white level of the white plate is
The bell signal is stored in the white level RAM 78 '(Step 12). First
FIG. 1-2 (c) shows the white level data of the RAM 78 '. next
Initializes the value of the counter i to 1 in the CPU working RAM 24
Temporary memory address M for storing the minimum value_TwoTo OO_HThe
Cut (Step 13). Next, the data in the white level RAM 78 '
(Wi) and M_TwoData (M_Two) And (Wi) is (M_Two)
M if larger_TwoData (M_Two) Is (Wi) and Wi is W₁Or
W₉₇₆Repeat until (Steps 14, 15, 16). As a result M_TwoIn
Indicates the maximum value in CH1. Then M_TwoMaximum value data in
Is white level reference value D_Four(In this embodiment, AO_H)When
It is determined whether or not they are equal (Step 17).
ep18), (M_Two) Is D_FourIf larger, CPU22 is D_4-βTo
Set the latch 523 in the multiplication circuit 258 and set the gain level.
Lower (Step 19), return to Step 13, and again in Step 17 (M_Two) = D_Four
Is determined. In Step18 (M_Two) <D_FourIn the case of, CPU22 is D
_{3 + β}Is set on the latch 523 in the multiplication circuit 258, and the gain
Raise the bell (Step 20), return to Step 13 and repeat in Step 17
(M_Two) = D_FourIs determined. As above (M_Two) = D_FourAchieved
Until the data is sent to the multiplying D / A521
_{4 ± β}Is changed, and when it is achieved, Step 17 changes to Step W-B2.
The counter is reset to 977 and the white level RAM 78 '
The same processing as that of CH1 of StepW-B1 is performed on CH2 of
_FourTo Next, in Step W-B3, W-B4, W-B5, CH3, CH
4, the maximum value of CH5 is D_FourAnd The above processing is performed by StepW-G
Signal, each of CH2, CH3, CH4, CH5 of R signal in StepWR.
And all the max values to D_FourAnd   The channel connection process is as shown in the flowchart of Fig. 11-3.
It will be executed accordingly. First, after powering on the leader, CPU22
Is S-m1 and the original scanning unit 11 is the home position sensor.
If the motor is not on the
Command to return to home position via signal line 503.
Out, the stepping motor 14 rotates and the home position
Have Yong return. Next, in S-m2, the lamp driver 21
A lighting command for the halogen lamp 10 is issued via the signal line 504.
You. After turning on the halogen lamp, the CPU 22 scans the original with S-m3.
Nit 11 is from home position (S1) to standard blackboard 9
Set the number of pulses corresponding to the travel distance to the driver 15,
The original scanning unit 11 is moved to the reference blackboard position. That state
In the state described above, the black level connected to the channel shown in FIG.
Processing is performed (S-m4). Next, the CPU 22 uses S-m5 as the reference blackboard.
The number of pulses corresponding to the distance between the reference
And move the document scanning unit 11 to the reference white plate position.
I do. In this state, the channel shown in FIG.
A connection white level process is performed (S-m6). Then S-m7
Turn off the log lamp and scan the original again with S-m8.
11 Home position return.   The channel connection process is performed as described above.
You.   With the above configuration and operation, high speed is achieved, and one pixel
It became possible to correct each time.   Further, in this configuration, the image data for one line is
Speed, and RD, WR accessible by CPU22.
Any position on the document, for example, on the document as shown in Figure 12.
Of the image data of the point P at the coordinates (xmm, ymm)
If necessary, move the scan unit (16 × x) lines in the x direction.
And this line is operated in the same manner as described above.
Import to M78 'and read data of (16 × y) pixel
As a result, the component ratios of B, G, and R can be detected.
The operation is called “line data capture mode”). Further
Is the average of multiple lines (hereinafter referred to as “average value calculation”
Mode) density histogram (“histogram mode”).
Is easily obtained by those skilled in the art.
It can be analogized to   As described above, the black level sensitivity and dark current
Variation, variation between sensors,
Black level and white level based on various factors such as white level sensitivity
Is corrected in the main scanning direction.
Color image data proportional to the amount of light
Logarithmic conversion circuit 86 (Fig. 5)
Is input to Here, white = 00_H, Black = FF_HTo be
The image that is converted and input to the image reading sensor
Sources, such as regular reflective manuscripts and film projectors
, Etc., and even the same transparent original,
Input with difilm or film sensitivity, exposure status
Since the gamma characteristics are different, FIGS. 13 (a) and (b)
As shown in the figure, the LUT for logarithmic conversion (lookup
Cable) and use them properly according to the application. Cut or cut
Is performed by signal lines lg0, lg1, lg2 (560 to 562), and C
Instruction input from operation unit etc. as I / O port of PU (22)
It is performed by Here, the data output for each B, G, R
Data corresponds to the density value of the output image, and B (blue)
Output for-) is the amount of yellow toner, G (green)
For magenta toner amount, for R (red)
Since this corresponds to the amount of cyan toner,
Image data is associated with Y, M, and C.   Each color component image from original image obtained by logarithmic conversion
Data, ie, yellow component, magenta component, cyan component
Then, the following color correction is performed. Color scanning
Of color separation filters arranged for each pixel
As shown in Fig. 14, the optical characteristics are unnecessary transmission as shown by the shaded area.
Area, while the color toner transferred to the transfer paper
(Y, M, C) also have unnecessary absorption components as shown in Fig.15.
Well known. Therefore, each color component image data Yi, Mi, Ci
Against Masking correction that calculates the primary expression of each color and performs color correction
Is well known. Furthermore, by Yi, Mi, Ci, Min (Yi, M
i, Ci) (minimum value of Yi, Mi, Ci) and calculate
The operation of adding black toner later (smearing) as black (black)
Reduce the amount of each color material added according to the crop and the added black component
Undercolor removal (UCR) operations are also common. Fig. 16 (a)
Fig. 2 shows the circuit configuration of masking, summing, and UCR. Main structure
What is unique about It has two masking matrices and one signal line
"1/0" can be switched at high speed. The presence / absence of UCR is switched off at high speed with one signal line “1/0”.
Can be replaced. Has two circuits to determine the amount of blemishes, "1/0" for high speed
You can switch. It is in the point. First, prior to reading the image,
Matrix coefficient of 1 Second matrix count From the bus connected to the CPU 22. In this example But, In registers 87-95, Is set to 96 to 104. 111-122,135,131
Each is a selector and selects A when the S terminal is "1".
When "0", B is selected. So the matrix When selecting the switch signal MAREA564 = "1"
Kusu M_TwoSelect “0” when selecting. 123 is a selector
And the selection signal C₀, C₁(566,567)
Outputs a, b, and c are obtained based on the truth table of (b). Choice
Signal C₀, C₁And C_TwoCorresponds to the color signal to be output,
For example, in the order of Y, M, C, and Bk (C_Two, C₁, C₀) = (0,0,0),
(0,0,1), (0,1,0), (1,0,0), and monochrome signal
The desired color corrected color by setting (0,1,1) as
Get the signal. Now (C₀, C₁, C_Two) = (0,0,0) and MAR
Assuming that EA = "1", the output (a, b, c) of the selector 123 is
The contents of registers 87, 88, 89, and therefore (a_Y1, −b_M1, −
C_C1) Is output. On the other hand, from the input signals Yi, Mi, Ci, Min
The black component signal 574 calculated as (Yi, Mi, Ci) = k is 134
And undergoes a linear transformation of Y = ax−b (a and b are constants).
(Through selector 135) to B input of subtractor 124,125,126
Is entered. In each of the subtractors 124 to 126, Y
= Yi- (ak-b), M = Mi- (ak-b), C = Ci- (ak-
b) is calculated and masked via signal lines 577, 578, 579.
Are input to multipliers 127, 128, and 129 for the computing operation. Sele
135 is controlled by signal UAREA565
Is UCR (under color removal), with / without switching at “1/0” at high speed
It is configured to be replaceable. Multipliers 127, 128, 12
9, each A input has (a_Y1, −b_M1, −C_C1), B
The input is [Yi- (ak-b), Mi- (ak-b), Ci
− (Ak−b)] = [Yi, Mi, Ci]
As is clear from the figure, the output Dout is C_Two= 0 condition (YorM
ort = Yout = Yi × (a_Y1) + Mi × (−b_M1) + Ci ×
(−C_C1) Is obtained, and the masking color correction and undercolor removal are performed.
The processed yellow image data is obtained. Likewise
hand Mout = Yi × (−a_Y2) + Mi × (b_M2) + Ci × (−C_C2) Cout = Yi × (−a_Y3) + Mi × (−b_M3) + Ci × (C_C3) Is D
Output to out. The color selection is a color pre-
(C₀, C₁, C_TwoFig. 16)
It is controlled by the CPU 22 according to the table of FIG. Register 1
05 to 107 and 108 to 110 are registers for monochrome image formation
Therefore, the same principle as the masking color correction described above
NO = k₁Yi + l₁Mi + m₁By weighting and adding each color by Ci
It has gained. Switching signal MAREA564, UAREA565, KAREA587
Is the coefficient matrix for masking color correction as described above. UAREA565, high-speed switching with and without UCR
In return, KAREA587 is a black component signal (signal line 569 → select
Output to Dout through the switch 131)
That is, for K = Min (Yi, Mi, Ci), Y = ck−d or Y = e
k-f (c, d, e, f are constant parameters)
Frog signal, for example, a mask for each area in one copy screen.
Change the King coefficient, or adjust the UCR amount or
It is configured so that it can be switched between. Follow
Images obtained from image input sources with different color separation characteristics
An image or a plurality of images having different black tones are used in this embodiment.
This configuration is particularly applicable to the case of combining. Note that this
The area signals MAREA, UAREA, and KAREA (564, 565, 587) are described later.
It is generated by an area generating circuit (FIG. 51).   Fig. 17 shows the area signal generation (MAREA564, UAREA565,
KAREA587). What is an area?
For example, it refers to the shaded part in Fig. 17 (e),
FIG. 17 (e) for each line in the section of the inspection direction A → B
Signals like AREA's timing chart AREA distinguish it from other areas
Is done. Each area is specified by the digitizer 16 in FIG.
FIGS. 17 (a) to 17 (d) show the generation position and area of this area signal.
The interval length and the number of sections are programmable by the CPU 22
Also shows a configuration in which a large number can be obtained. In this configuration,
One area signal is based on one bit of CPU-accessible RAM.
And obtains, for example, n area signals AREA0 to AREAn
For this purpose, two n-bit RAMs are provided. (Fig. 17
(D) 136,137). Now, the area signal ARE as shown in FIG.
If A0 and AREAn are obtained, RAM address x₁, X_ThreeNo
Set “1” to bit 0, and set bit 0 for all remaining addresses.
Set to “0”. On the other hand, RAM address 1, x₁, X_Two, X_FourTo “1”
And all other addresses and bit n are set to "0".
The data in RAM is synchronized with a fixed clock based on HSYNC.
When data is sequentially read out sequentially, for example,
17 As shown in FIG.₁And x_ThreeData "1"
Is read. This read data is shown in FIG.
(D) J of the JK flip-flop of 148-0 to 148-n,
The output is toggled, that is, RAM
When “1” is read out and CLK is input, output “0” →
“1”, “1” → “0” changes, and the section signal like AREA0
Thus, a region signal is generated. Also, all addresses
If the data is set to “0”, no area section occurs and the area is set.
No determination is made. FIG. 17 (d) shows this circuit configuration.
6,137 is the above-mentioned RAM. This is a fast way to
To switch, for example, write data from RAMA136 every time.
The CPU reads RAMB137 while reading data
Memory writing for setting a different area from 22 (Fig. 2)
Interval operation, and the interval generation
Switch memory writing. Therefore, FIG.
When the shaded area is specified, RA is set as A → B → A → B → A
MA and RAMB are switched, which is shown in Fig. 17 (d).
And (C_Three, C_Four, C_Five) = (0,1,0)
The output of the counter that is
9 to RAMA136 (Aa), gate 142 open, gate
Read out from RAMA 136 and all bits
The width and n bits are JK flip-flops 148-0 to 148-
n, and the area of AREA0-AREAn according to the set value.
An interim signal is generated. Writing from CPU to B
During the address bus A-Bus, data bus D-Bus and
Access signal /. Conversely, it was set to RAMB137
When generating an interval signal based on data (C_Three, C_Four,
C_Five) = (1,0,1) and can be done in the same way.
Data can be written to MA136 (these two RAMs
Are A-RAM, B-RAM, C_Three, C_Four, C_FiveAREA control signal
(ARCNT)… C_Three, C_Four, C_FiveFrom the CPU I / O port
Force). Fig. 17 (g) shows the correspondence table between each bit and signal name.
Is shown.   Next, a circuit configuration of the color conversion will be described with reference to FIG. here
Color conversion is the color component data input to this circuit
(Yi, Mi, Ci) has a certain color density, or
If you have a color component ratio, replace it with another color
To tell. For example, the red (hatched portion) of the original in FIG. 18 (c)
We say that we change to blue only for minute. First, input to this circuit
Each color data (Yi, Mi, Ci) is averaged by averaging circuits 149, 150 and 151.
The average is calculated in units of 8 pixels, and one is calculated by an adder 155 (Yi + M
i + Ci) is calculated and input to the B inputs of the dividers 152, 153, 154.
The other side goes to the A input, and the input color component ratio is yellow.
-Ratio ray = Yi / Yi + Mi + Ci, Magenta ratio ram = Mi / Yi + M
i + Ci, cyan ratio rac = Ci / Yi + Mi + Ci, respectively
Obtained as signal lines 604, 605, 606
Data 156 to 158. Here, the settings are made from the CPU bus.
The upper and lower limits of the comparison for each color component to be determined, thus (yu, m
u, cu) and (yl, ml, cl) have the above ratio
That is, when yl ≦ ray <yu, output = “1”, ml ≦ ram <mu
In the case of, the output = "1", and when cl ≤ rac <cu, the output = "1".
When the above three conditions are met, the input color is the desired color
And the output of the 3-input AND165 becomes 1 and the selector
175 S₀Entered in the input. The adder 155 is an I / O port of the CPU 22.
Output when the signal line CHGCNT607 output from the port is "1" When "0", the output 603 = 1 is output. Therefore
When "0", the outputs of dividers 152, 153 and 154 are
Will be output. That is, at this time, the registers 159 to 164
Instead of the desired color component ratio, color density data is set.
175 is a four-input, one-output selector.
For the forces 1, 2, and 3, the desired color data after conversion is the Y component, respectively.
Input as M component and C component, while 4 read
Masked color correction and UCR applied to the original image
Data Vin is input and connected to Dout in FIG. 16 (a).
You. Switch input S₀Indicates that the color detection is "true", that is,
“1” when the color is detected, “0” otherwise,₁Is the 17th
The area signal CHAREA generated by the area generation circuit shown in FIG.⁰6
At 15, the specified area is "1" and outside the area is "0", which is "1".
When color conversion is performed, it is not performed when it is “0”. S_Two, S_Threeinput
C₀, C₁(616,617) is C in Fig. 16 (a).₀, C₁Same as signal
And (C₀, C₁) = (0,0), (0,1), (1,0)
Time, yellow image formation with a color printer,
Magenta image formation and cyan image formation are performed. Selector
The truth table of 175 is shown in FIG. 18 (b). Register 166-16
8 is the desired color component ratio or color component density data after conversion
Is set from the CPU. where y ', m', and c 'are color component ratio fields
In this case, since CHGCNT607 is set to “1”, the output of the adder 155
The force 603 becomes (Yi + Mi + Ci), and the B input of the multipliers 169 to 171
Input to the selector inputs 1, 2, and 3 respectively. (Yi + Mi + Ci) × y ′, (Yi + Mi + Ci) × m ′, (Yi +
Mi + Ci) × c ' Is input and color conversion is performed according to the truth table in FIG. 18 (b).
Is done. On the other hand, when y ', m', c 'are color component density data,
CHGCNT is set to “0” and the signal 603 is set to “1”.
The outputs of 69-171, and therefore the inputs 1,2,3 of selector 175,
Data (y ', m', c ') is input as it is,
Color conversion is performed by replacing the degree data. Area signal
CHAREA⁰615 is the section length and number can be set arbitrarily as described above.
Therefore, as shown in FIG. 18 (d), a plurality of regions r₁, R_Two, R_ThreeTo
This color conversion can be applied only if
By preparing the road, for example, the area r₁Inside is red → blue, r_TwoInside
Red → yellow, r_ThreeInside are multiple areas such as white → red, multiple colors
Barrel color conversion is also possible at high speed and in real time. this
Is the same color detection → conversion circuit as the previously described circuit
The outputs A, B, C, D of each circuit are selected by the selector 230.
More necessary data is selected by CHSEL0 and CHSEL1 and output.
Output to force 619. The area signal applied to each circuit
Is CHAREA0 ~ 3, and CHSEL0 and 1 are as shown in Fig.17 (d)
And is generated by the area generating circuit 51.   Fig. 19 shows the color variation of the output image in this system.
Gamma conversion circuit to control the
Basically, LUT (lookup table) data
Data conversion, corresponding to the input specification from the operation unit
LUT data is rewritten. Data in RAM 177 for LUT
When writing, select signal line RAMSL623 = "0"
Selector 176 selects the B input, gate 178 is closed, 1
79 is open and the buses ABUS and DBUS (address data
Data) is connected to the RAM 177 to write or read data.
Delivery is performed. After the one-shot conversion table is created
RAMSL623 = "1" and the video input from Din620 is RAM1
77 address input, address with video data
And the desired data is output from RAM and opened.
The signal is input to the next-stage scaling control circuit through the port 178. Ma
The gamma RAM contains yellow, magenta, cyan, and blue.
Rack and MONO, 5 types, at least 2 types (Fig. 19 (b)
A and B), and switching for each color is the same as in FIG.
Like C₀, C₁, C_Two(566,567,568) and said area
Generation circuit By GARA626 generated by Fig. 17, for example
For example, as shown in FIG.
Area B has a gamma characteristic of B
It is a configuration that can be obtained as a point.   This gamma RAM has two types of zooming characteristics, A and B, for each area.
Can be switched at high speed, but it is necessary to add this
It is also possible to switch more characteristics at high speed
is there. Dout 625 in FIG. 19 (a) is a modification of FIG. 20 (a) in the next stage.
It is input to the input Din626 of the double control circuit.   In addition, this gamma conversion RAM is
The characteristics can be switched individually for each color.
Operation and association with LCD touch panel keys on the panel
From the CPU 22. For example, Fig. 33 P000 (standard
The operator touches the density adjustment key e or f on the
Then, when e is touched from the center 0, FIG. 19 (d)
As shown in (e), the setting moves from -1 to -2 to the left, and the RAM 177
The characteristics are also selected and rewritten as -1 → -2 → -3 → -4.
It is. On the contrary, when f is touched, the characteristic becomes + 1 → + 2 → + 3 →
The RAM 177 selected like +4 is similarly rewritten. Immediately
Touch the e or f key on the standard screen
By the way, all tables of Y, M, C, Bk or MONO (RAM177)
It can be rewritten, and the density can be adjusted without changing the color tone.
You. On the other hand, the screen shown in Fig. 37 (P420)
Color balance adjustment), the color balance
For adjustment, RAM177 for Y, M, C, Bk
Rewrite only the inner area. That is, for example, the yellow component
To change the color tone, touch key y on screen P420₁Pressing black
The band display extends upward and the conversion characteristics are shown in FIG.
Like y₁Direction, and therefore the yellow component becomes darker.
, Touch key y_TwoAnd touch y_TwoCharacteristics are selected in the direction
And the yellow component becomes lighter. That is, this
In the operation, the density changes only for the single color component and the color tone changes.
The same applies to M, C, and Bk.   FIG. 20 (a) 180 and 181 are respectively in the main scanning direction and one line.
16 x 297 = 4 with 16 pel / mm, A4 longitudinal width 297 mm
This is a FiFo memory with a capacity of 752 pixels.
Notes during ▲ ▼, ▲ ▼ = “Lo” as in (b)
Write operation to the memory, ▲ ▼, ▲ ▼ = “Lo”
Perform section read operation, and when ▲ ▼ = “Hi”,
Output, B output is high impedance when ▲ ▼ = “Hi”
Each output is wired OR
Is obtained and output as Dout627. FiFoA, FiFoB180,18
1 operates internally with WCK and RCK (clock), respectively
Write address counter, read address counter (No.
As shown in Fig. 20 (c), the internal pointer moves forward.
So the WCK has a system
Multi-route video data transfer clock VCLK588 in
Apply thinned CLK with pliers 630 and VCLK588 to RCK
If CLK is not subtracted, the input data to this circuit will be output
It is well known that sometimes it is reduced,
Yes, the read and write operations are performed alternately for FiFoA and B
It is. Furthermore, the W address counter in the FiFo memories 180 and 181
Data 182, R address counter 183 outputs enable signals (WE, R
E… 635,636) is enabled.
Count, and initialized by RST (634) = "Lo"
Because of the configuration shown in Fig. 20 (d),
RST (In this configuration, the synchronization signal ▲
▼), then n₁Only m pixels from the pixel
▲ ▼ = “Lo” (same for ▲ ▼)
Data and write n_TwoM pixels from the pixel eye ▲ ▼
= “Lo” (same for ▲ ▼) and read the pixel data
When it is issued, it moves like ERITE data → READ data in the same figure
You. That is, ▲ ▼ (and ▲ ▼), ▲
Variable ▼ (and ▲ ▼) occurrence position and section
By doing so, the image can be transformed as shown in Fig. 20 (e) (f) (g).
Moves arbitrarily in the main scanning direction and during the above-mentioned WCK or RCK
The control to change the magnification and move by combining with the pull
Easy to do. ▲ ▼, ▲ input to this circuit
▼, ▲ ▼, ▲ ▼ are area generation circuits Fig. 17
By (d), it is generated as described above.   In FIG. 20, scaling control is performed in the main scanning direction as necessary.
After that, edge enhancement and smoothing (smoothing
Is performed. FIG. 21 (a) is a block diagram of this circuit.
In the drawing, memories 185 to 189 each store one line in the main scanning direction.
With a capacity, a total of 5 lines are sequentially stored in a cycle.
And have a FiFo configuration that is output in parallel at the same time. 19
0 is a commonly used second-order differential space filter,
Edge components are detected, and the output 646 is 196, as shown in FIG.
A gain of the indicated characteristic is applied. Oblique in FIG. 21 (b)
The line portion is the smaller component output by edge enhancement,
That is, it is clamped to 0 to eliminate noise components. one
The buffer memory output for 5 lines is smoothed
Input to roads 191 to 195, 1x1 to 5x5 respectively
Averaging is performed in pixel block units of the five sizes shown.
The desired smoothed signal among the outputs 641 to 645 is
Selected by Lector 197. The SMSL signal 651 is
Output from the / O port, and from the operation panel as described later.
It is controlled in association with the specification. 198 is a divider.
For example, if 3 × 5 smoothing is selected, CPU2
“15” is set from 2 and 3 × 7 smoothing is selected.
In this case, “21” is set by the CPU 22 and averaged.   The gain circuit 196 has a look-up table (LUT) configuration.
As in the case of the gamma circuit shown in FIG.
RAM to which data is written by the CPU 22
When A652 is set to “Lo”, the output becomes “0”.
I have. Further, the edge enhancement control and the smoothing control are not controlled.
It corresponds to the LCD touch panel screen on the
In the screen shown in Fig. 21 (d) (P430 in Fig. 2-7), select <Sharpness
> When operated by the operator in the strong direction as 1,2,3,4
As shown in FIG. 21 (c), the conversion characteristic of the gain circuit
Rewritten by U22. On the other hand, <Sheepness>
Is operated by the operator in the direction of 1 ', 2', 3 ', 4'
And the switching signal SMSL652 of the selector 197,
The block size of the ging is 3 × 3,3 × 5,3 × 7.5,5 × 5
Selected to be larger. At center point 1 × 1 is selected
As a result, the gain circuit input EAREA651 becomes “Lo” and the input Din
Neither smoothing nor edge enhancement is performed.
It is output as Dout to the output of 199. In this configuration,
For example, moire generated for halftone dot originals is smoothing
And the character and line drawing parts are improved.
Sharpness is improved by performing azalea emphasis.
When a point document and a character / line drawing are in the same document,
When smoothing is applied to improve
The drawback that moiré appears strongly when emphasizing azaleas
The EA generated in the area generation circuit in FIG.
By controlling REA651 and SMSL652, for example, SMSL652
To select 3 × 5 smoothing, as shown in FIG. 21 (e).
Generate EAREA651 like A ', B' and add dots and letters
When applied to genial, moiré is improved for tint image
Thus, the sharpness of the character area is improved. Signal TM
AREA660 is generated from the area generation circuit 51 like EAREA651.
When TMAREA = "1", output Dout = "A + B", TMAREA =
When "0", Dout = "0". Therefore, to control TMAREA660
Thus, for example, a signal as shown in FIG. 21 (f) 660-1 is generated.
Then, the shaded area (the inside of the rectangle) is extracted and Fig. 21 (g) 66
When a signal like 0-2 is generated, the shaded portion (outside the rectangle)
Sampling (opening) is performed.   Fig. 5 200 is the coordinates of the four corners of the original placed on the platen
The original coordinates recognition circuit (not shown)
After a preliminary scan for document position recognition.
U22 reads the coordinate data from the register. JP 5
9-74774
You. However, in the preliminary scan for document position recognition,
After the black and white corrections shown in FIGS. 10 and 11 (a),
16 The masking calculation coefficient shown in FIG.₁, L₁,
m₁Select the monochrome image data for₀, C₁,
C_TwoIs UARE (0,1,1) and not UCR (under color removal)
A565 = “Lo” to make monochrome image data
Is input to the document position recognition unit 200.   FIG. 22 shows an operation panel unit according to the present invention, particularly a liquid crystal screen.
And a key matrix. Fig. 5 CPU bus 508
LCD controller 201 and key input,
I / O port that controls the key matrix 209 for key input.
The operation panel is controlled by a command given to
You. Fonts to be displayed on the LCD screen are stored in FONT ROM205
It is refreshed every time by the program from CPU22.
The data is transferred to the hash RAM 204. LCD controller of display
Screen data for LCD display via LCD driver 202
And sends the desired screen. On the other hand,
All forces are controlled by I / O port 206 and are generally
The key pressed by the scanned key scan is detected and
I / O ports are input to the CPU 22 through the sheaver 208.   Fig. 23 shows a film project for this system (Fig. 1).
2 shows a configuration in the case where the data 211 is mounted and connected. Same as Fig. 1
The number 1 is the same component, and the reflection mirror is placed on the platen 4.
-218, Fresnel lens 212, and diffusion plate 213
Place the mirror unit on the film project 211
Scans the transmitted light image of the film 216
Scanning in the direction of the arrow with the unit
Read on. Film 216 is fixed with film holder 215
Lamp 212 and the lamp controller 212
Controller to control ON / OFF and lighting voltage
PJON655, PJCNT6 from I / O port of CPU22 (Fig. 2) in 13
57 is output. The ramp controller 212 is an 8-bit
Ramp as shown in Fig. 24 depending on the value of input PJCNT657
The lighting voltage is determined and usually controlled between Vmin and Vmax
You. At this time, the input digital data is D_A~ D_BIt is. 25th
Figure (a) reads the image from the film project,
Operation flow for copying, timing shown in Fig. 25 (b)
An outline of the chart is shown. In S1, the operator loads the film 216.
Set to the illuminator 211 and operate the operation panel described later.
According to the operating procedure from the
The lamp lighting voltage Vexp is determined by positive (S2) and AE (S3),
The printer 2 is started (S4). ITOP from printer
(PJCNT = Dexp (appropriate
(Corresponds to positive exposure voltage)
become. A Y image is formed by the ITOP signal, and
Between D_A(Corresponding to the minimum exposure voltage)
When the lamp is turned on,
Prevents deterioration and extends life. After that, similarly, the M image
PJCNT after formation, C image formation, black image formation (S7 ~ S12)
= "00" to turn off the lamp.   Next, according to FIGS. 29 (a) and (b),
AE and shading correction processing procedures
You. The operator sets the projector mode using the operation panel.
Once selected, the operator first selects the film to be used.
-Negative film, color positive, black and white
Select whether the image is black or white or black positive. Carane
If this is not the case, insert a cyan color correction filter.
Set the film carrier 1 to the projector
And the unexposed part (film base) of the film to be used
Set on the film holder, and the film ASA feeling
Select whether the degree is 100 or more and less than 400 or 400 or more
And press the shading start button.
Lamp is the reference lighting voltage V₁Lights up. Where cyan
For the system filter, use the orange base of the color negative film.
Cut the color sensor with R, G, B filters
Improve color balance. In addition, shrink from the unexposed area
By extracting the date data, the negative film
In this case, the dynamic range can be widened. Color negative
If it is not a film, insert the ND filter.
The film carrier 2 (or no filter)
Touch and start shading on the LCD touch panel
Press the key to set the projector lamp to the reference lighting voltage V_Twoso
Light. In practice, the operator is a negative or positive
If you select film or not, the reference lighting voltage V₁, V_TwoCut or cut
E is automatically recognized by recognizing the type of film carrier
You may do it. Next, the scanner unit projects the image.
Move to the vicinity of the center of the
Average value as shading data for each of R, G, B
Injected into RAM78 'of Fig. 11 (a), Projector
Turn off the lamp.   Next, copy the image film 216 to be actually copied
Set on Ruder 215 and if you need to adjust the focus
Melody ejector with lamp lighting button on operation panel
Turn on the lamp, adjust the focus visually, and then
The lamp is turned off by the lamp light button.   When the copy button is turned on, the color negative
The projector lamp is set to V₁Or
V_TwoAutomatically turns on, and the pre-scan (A
E) is performed. Priskyan shoots the film to be copied
This is to determine the exposure level at the time.
Done by That is, the image projection area is determined in advance.
R signals of multiple lines are input by CCD and the R signals
The frequency of appearance is accumulated, and a histogram as shown in Fig. 25 (c) is obtained.
Create a histogram (Fig. 11 “Histogram creation mode”).
D)). From this histogram, the max value shown in the figure is obtained, and m
The maximum and minimum values that the histogram crosses 1/16 of the ax value
Find small R signal values Rmax and Rmin. And operator
-The lamp intensity is doubled according to the film type selected first.
The number α is calculated. α value is color or black and white positive film
For α = 255 / Rmax, for black and white negative α = C₁/ Rmin, ASA feeling
Α = C for color negatives less than 400 degrees_Two/ Rmin, ASA sensitivity 400
For the above color negative α = C_ThreeCalculated as / Rmin
You. C₁, C_Two, C_ThreeIs required due to the gamma characteristics of the film.
It is a value that is determined based on about 40 to 50 out of 255 levels
Value. α value is determined according to a predetermined look-up table.
Output data to the variable voltage power supply of the projector lamp.
Data. Then you can get
The projector lamp is turned on by the
The log conversion table is turned on according to the film type.
Fig. 3 (a) and masking coefficient Fig. 16 (a) have appropriate values
The normal copy operation is performed when set. Logarithmic conversion
As shown in FIG. 3 (a), the selection of the
Eight tables from 1 to 8 are selected by the switching signal
1 for reflective originals, 2 for color positive, 3 for white
For black positive, 4 for color negative (less than ASA400), 5 for color
Negative (ASA400 or more), 6 used for black and white negative ...
Good. The contents are set independently for each of R, G and B.
I can do it. Fig. 13 (b) shows an example of table contents
Is shown.   Thus, the copying operation is completed. For the next film copy
When moving, film layer properties (negative / positive, color / black and white)
etc) will be changed by the operator.
Return to Fig. 29 (a) if
And the same operation is repeated again.   As described above, the film projector 211
Compatible with Ga, Positive, Color and Black & White films
Printout is obtained, but in this system
As you can see, the film image is projected on the platen
And there are few fine character line drawings and
In particular, smooth reproduction of gradation is required. There
In this system, the color LBP output side
Make the gradation process different from when printing from a reflective original
I have. It is included in the printer controller 700
This is performed by a PWM circuit (778).   Hereinafter, the PWM circuit 778 will be described in detail.   FIG. 26 (A) is a block diagram of the PWM circuit, and FIG. 26 (B).
Shows a timing chart.   The input VIDEO DATA 800 is VCLK80 by the latch circuit 900.
Latched at the rising edge of 1 and synchronized with the clock
(B) See FIGS. 800 and 801). V output from the latch
IDEO DATA815 is a LUT composed of ROM or RAM.
Tone correction is performed by the D / A (Digital
D / A conversion is performed by the converter 902, and one analog
A video signal is generated, and the generated analog signal is
Input to the comparators 910 and 911 and compared with the triangular wave described later.
It is. The signals 808 and 809 input to the other side of the comparator
Each triangle is synchronized to VCLK and generated independently
Waves ((B) FIGS. 808 and 809). That is, twice as large as VCLK801
The frequency synchronization clock 2VCLK803, one of which is, for example, J-K
Reference signal for triangular wave generation divided by 2 by flip-flop 906
No. 806, the triangular wave generated by the triangular wave generation circuit 908
WV1 and the other is obtained by dividing 2VCLK by 6 with a 6-divider circuit 905.
807 (refer to (B) Fig. 807)
This is a triangular wave WV2 generated on the road 909. Each triangle wave and VIDEO
DATA is all synchronized with VCLK as shown in FIG.
Generated. Furthermore, each signal is generated in synchronization with VCLK.
HSYNC inverted to synchronize with HSYNC802
05,906 is initialized at HSYNC timing. The above operation
The output VID of CMP1910 and CMP2 911 is
Depending on the value of EO DATA800, a pulse as shown in Fig. (C)
A width signal is obtained. That is, in this system, the AN in FIG.
When the output of D gate 913 is “1”, the laser lights up and prints
A dot is printed on the paper.
Nothing is printed on lint paper. Therefore, the control signal LO
The light can be controlled by N (805). Figure (C) is from left to right
When the level of the image signal D changes from “black” to “white”
It shows the situation. The input to the PWM circuit is “FF” for “white”,
Since “black” is input as “00”, the D / A converter 902
The output changes like Di in FIG. In contrast,
The angle wave is like WV1 in (a) and WV2 in (b)
Therefore, the outputs of CMP1 and CNP2 are like PW1 and PW2, respectively.
The pulse width becomes narrower as it goes from “black” to “white”
Good. Also, as is clear from FIG.
Dot P on paper₁→ P_Two→ P_Three→ P_FourFormed at intervals of
The amount of change in the loose width has a dynamic range of W1. one
If you select PW2, the dot is P_Five→ P₆Formed at intervals of
The dynamic range of the pulse width is W2, compared to PW1.
Each has tripled. By the way, for example, printing density
(Resolution) is about 400 lines / inch for PW1, about 133 lines / i for PW2
Set to nch etc. As is clear from this, PW1 was selected.
When selected, the resolution is about three times higher than when PW2,
On the other hand, when PW2 is selected, the pulse width
The tongue range is about three times as wide, so the gradation is significantly improved.
You. Therefore, for example, when high resolution is required, PW1 is
If gradation is required, external circuit should be selected to select PW2
SCRSEL804 is given. That is, 912 in FIG.
A input selection when SCRSEL804 is "0", that is, P
When W1 is “1”, PW2 is output from the output terminal.
The laser is turned on for the pulse width obtained and the dot is marked.
Character.   The LUT901 is a table conversion ROM for gradation correction.
812,813 K to the dress₁, K_Two, 814 table switching signal, 81
VIDEO D input with 5 video signals and corrected from output
ATA is obtained. For example, select SCRSEL804 to select PW1
When set to “0”, the output of the ternary counter 903 becomes “0” and 9
The correction table for PW1 in 01 is selected. Also K₀, K
₁, K_TwoCan be switched according to the color signal to be output.
If K₀, K₁, K_Two= “0,0,0”, yellow output, “0,1,
Magenta output when "0", cyan output when "1,0,0", "1,1,
When "0", black output is performed. That is, color image to be printed
The gradation correction characteristic is switched every time. This allows
Due to differences in image reproduction characteristics depending on the color of the beam printer
This compensates for differences in grayscale characteristics. Also K_TwoAnd K₀, K₁Pair of
It is possible to perform a wider range of gradation correction by combining
You. For example, gradation conversion characteristics of each color according to the type of input image
Can also be switched. Next, select PW2
When SCRSEL is set to “1”, the ternary counter 603
Count of the sync signal of “1” → “2” → “3” → “1” →
“2” → “3” →... Are output to the address 814 of the LUT. to this
Switch the gradation correction table for each line
To further improve the gradation.   This will be described in detail with reference to FIG. 27 and subsequent figures. The song in the same figure (A)
Line A selects, for example, PW1 and sets the input data to "FF",
Input data when changing from “white” to “0”, that is, “black”
6 is a characteristic curve of plotter density versus print density. Typically the characteristic is K
It is desirable that there be A
B, which is the reverse characteristic, is set. The same figure (B) shows PW2
When selected, the gradation correction characteristics A, B, and C for each line are used.
In the main scanning direction (laser scanning method)
In the sub-scanning direction (image transmission)
Direction) as shown in the figure to give three levels of gradation,
Improve tonal characteristics. That is, in the part where the density change is sharp,
Characteristic A becomes dominant, and steep reproducibility is achieved.
Reproduced by the characteristic C, B is the effective gradation for the middle part
To reproduce. Therefore, even if PW1 is selected as described above,
When PW2 is selected with a certain level of gradation guaranteed at high resolution
Guarantees very excellent gradation. In addition,
For example, in the case of PW2, ideally a pulse
The width W is 0 ≦ W ≦ W2, but the laser beam printer
Of electrophotographic characteristics and response characteristics of laser drive circuits, etc.
Dots are not printed with a pulse width shorter than a certain width
FIG. 28 0 ≦ W ≦ wp, and the density is saturated
There is an area in FIG. 28 where wq ≦ W ≦ W2. Therefore, the pulse
In the width and density range, the effective area wp ≦ W ≦ wq
It has been set so that the loose width changes. That is, FIG. 28 (B)
Data 0 (black) to FF_HChanged to (white)
The pulse width changes from wp to wq.
Further, the linearity between density and concentration is further guaranteed.   The video signal converted to the pulse width as described above is
Added to the laser driver 711L via the
Modulates the laser light LB.   Note that the signal K in FIG.₀, K₁, K_Two, SCRSEL, LON
FIG. 2 shows a control circuit (not shown) in the printer controller 700.
Serial communication with the reader unit 1 (described above)
Is output based on SCRSEL = “0”, especially for reflective originals.
When using a film projector, control SCRSEL to “1”.
And a smoother gradation is reproduced. (Image forming operation)   Now, the laser beam LB modulated according to the image data
Is rotated by a polygon mirror 712 that rotates at high speed.
High-speed scanning is performed horizontally at the width of the arrow AB, and the f / θ lens 13 and the
Image on the surface of the photosensitive drum 715 through the mirror 714
Dot exposure corresponding to the image data is performed. Laser light 1
The horizontal scanning corresponds to one horizontal scanning of the original image.
Corresponds to a width of 1/16 mm in the feed direction (sub-scanning direction).   On the other hand, the photosensitive drum 715 rotates at a constant speed in the direction of arrow L in the figure.
In the main scanning direction of the drum, the laser
-Light scanning is performed, and the photosensitive drum is
As the drum 715 rotates at a constant speed,
The planar image is exposed to form a latent image. Prior to this exposure
From the uniform charging by the standing charger 717 → the above exposure →
And toner development by developing sleeve 731
Is formed. For example, the first in color reader
Yellow of the developing sleeve 731Y corresponding to the original document exposure scan
-If developed with toner, the original
A toner image corresponding to the yellow component of Document 3 is formed.
You.   Next, the leading end is held by the gripper 751 and the transfer
The photosensitive drum 715 is placed on the paper body 754 wrapped around the
The transfer charger 729 provided at the contact point between the
Transfer and form a yellow toner image. Same as this
One process is described as M (magenta), C (cyan), Bk (b
Repeat for each image, and print each toner image
By superimposing on body 754, full of four color toner
A color image is formed.   Thereafter, the transfer paper 791 is moved to the movable peeling claw 750 shown in FIG.
From the transfer drum 716, and
The image is guided to the image fixing unit 743, and the heat and pressure rollers 744 and 74
5, the toner image on the transfer paper 791 is fused and fixed. <Explanation of operation unit>   FIG. 31 is an explanatory view of the operation unit of the color copying apparatus, and a key
401 is a reset key to return to standard mode, key 402 is after
Register mode or service mode setting
Enter key and key 404 are used to input numerical values such as the set number.
Numeric keypad and key 403 are used for clearing the number and continuous copying
Clear / Stop key for stopping, 405 is Tachipane
Key to display the settings of each mode and the status of the printer 2.
It is shown. Key 407 is in the movement mode described later
Center shift key to specify the center shift of the key, key 408
Automatically detects document size and document position when copying
The document recognition key and key 406 are the projector mode described later.
Key 409 is the project key that specifies the
Recall key, key 410 to restore
Stores the preset values of each mode programmed in advance or
Memory key (M1, M2, M3, M4) for calling, key 411
This is the registration key for the memory. <Digitizer>   FIG. 32 is an external view of the digitizer 16. Key 422,42
3,424,425,426,427 are for setting each mode described later
This is an entry key.
Area to specify the area of, or to set the magnification
The point pen 421 points to the coordinates.
It is determined. These keys and coordinate input information are
Data is received from the CPU 22 via the bus 505, and
Accordingly, these information are stored in the RAM 24 and the RAM 25. <Description of standard screen>   FIG. 33 is an explanatory diagram of a standard screen. The standard screen PO00 is
This screen is displayed when not copying or setting.
Settings for scaling, paper selection, and density adjustment can be made. Lower left of screen
Can specify the so-called fixed-size scaling, for example, touch
Pressing the key a (reduce), the size of the
The change and magnification are displayed. Also touch key
Press b (enlarge) to display the size and magnification in the same way.
In a color copying apparatus, three reduction stages and three enlargement stages can be selected.
To return to the same size, press the touch key h (1 ×)
100% magnification. Next, press the touch key c in the display center.
Then, the upper cassette and the lower cassette can be selected. Again
Press key d to enter the paper that best fits the document size
APS (Automatic Paper Selection) that automatically selects the current cassette
-Select) mode can be set. On the right side of the display
Touch keys e and f are used to adjust the density of the printed image.
The key can be set during copying. Also, touch key
g is the value of each touch
It explains how to make copies and how to make copies. Description
This screen makes it easy for the operator to see this screen.
ing. In addition to the explanation of the standard screen,
In the fixed mode, explanation screens for each mode are prepared.
Have been. In the black striped stripe display at the top of the screen
Displays the status of each currently set mode, and
You can check mistakes and settings. Again below
The message display section of the column has a book color copy like the screen PO20.
Messages such as the status of the imaging device and operation errors are displayed.
You. In addition, JAM and messages for replenishing each toner are displayed on the entire screen.
The display of the printer unit 16 is displayed on the body, and paper is
It is easier to determine whether or not. <Zoom zoom mode>   Zoom magnification mode M100 changes the size of the original
Mode with manual zoom zoom mode M110
It is composed of an auto zoom magnification mode M120. Manuille
The al-zoom zoom mode M110 uses the X-direction (sub-scanning direction)
Independent magnification in Y direction (main scanning direction) in 1% units
Set an arbitrary magnification from the editor or touch panel.
Can be determined. Auto zoom magnification mode M120 can be selected as original
Automatically calculates the appropriate magnification according to the paper size
XY independent auto scaling and XY
You can specify 4 types of auto scaling, X auto scaling, and Y auto scaling.
You. XY independent auto zooming
The selected paper size for the specified area
Thus, the magnifications in the X and Y directions are independently and automatically set. XY
The same-rate auto-magnification is calculated based on the XY independent auto-magnification
At the smaller magnification, both XY are scaled at the same rate and printed.
X auto zoom and Y auto zoom are only available in the X direction and only in the Y direction.
In this mode, the camera is zoomed.   Next, let's look at the LCD panel screen
It will be described using FIG. Press zoom key 422 on digitizer 16
Then, the display changes to the screen P100 in FIG. Here is Manuille
To set the al-zoom, set the coordinates of the editor 16
Intersection of magnification in X and Y directions written on detection plate 420
Is designated with the point pen 421. At this time, the display is on screen P110
Is displayed, and the designated X and Y magnification values are displayed.
It has become. Therefore, further fine-tune the displayed magnification
When you want to do that, for example, if only the X direction is
Press the left and right keys (up, down) to adjust. Also XY
When you want to make adjustments at a rate, touch the left and right keys of touch key d.
Use, the display will be pulled down at the same rate as XY. Then auto
To set the zoom, from the screen P100,
Use digitizer 16 or press touch key a
Then, the display is advanced to the screen P110. Therefore, the four types
Auto zoom, XY independent auto zoom, XY same rate P auto zoom,
To specify X auto scaling and Y auto scaling,
Touch keys b and C, touch key d, touch key b
Press the touch key c to obtain the desired auto zoom.
Can be <Move mode>   Movement mode M200 consists of four types of movement modes
Center move M210, corner move M220,
The designated movement is M230 and the binding margin is M240. Center move M
210 selects the original size or the specified area on the original
Paper so that it is printed exactly in the center of the
Mode. Corner movement M220 is the original size or
Any of the four corners of the selected paper with the specified area on the manuscript
This is the mode to move to the crab. Here, as shown in Fig. 43,
Print image is larger than the selected paper size
Sometimes, it moves from the specified corner as the starting point
Controlled. The designated movement M230 is for
Mode to move the area to any position on the selected paper
is there. Binding margin M240 is the left and right of the selected paper feed direction.
Mode that moves to create a margin for the so-called binding margin
It is.   Next, the actual operation method of this color copier
This will be described with reference to FIG. First, move digitizer 16
When the moving key 423 is pressed, the display changes to the screen P200. Screen P200
Then, the four types of movement modes described above are selected.   To specify the center move, touch the
Press key a to end. For corner movement, touch key b
Press to change the display to screen P230, where the four corners are
Specify one of the Here, for actual printing
Correspondence of moving direction to paper and specified direction on screen P230
Is selected on the digitizer 16 as shown in FIG. 35 (b).
Do not change the orientation of the cassette paper.
It has the same image as When you want to perform a designated move
Press touch key c on screen P200 to go to screen P210,
The destination position is designated by the digitizer 16. This time table
The display will change to screen P211 and use the up-down key in the figure.
Fine tuning is possible. Next, move the binding margin
To perform the operation, press the touch key d on screen P200 to display screen P2.
Specify the length of the margin with the 20 up-down keys.
You. <Explanation of area designation mode>   In the area designation mode M300, one place on the original or
Multiple areas can be specified, each for each area
Trimming mode M310, masking mode M320, image
Arbitrary mode setting among the three release modes can be performed. here
The trimming mode M310 described in
Copy only the image on the side, and use the masking mode M3
20 means mask the inside of the specified area with a white image
It is to do pe. The image separation mode M330 is
Color mode M331, color conversion mode M332, paint mode M3
33, Select any mode from Color Balanced M334
You can choose. In color mode M331,
4 colors full color, 3 colors full color Y, M, C, Bk, RED, G
Select any color mode from 9 types of REEN and BLUE
it can. In the color conversion mode M332,
Replace the specified color part with the desired density range with another arbitrary color.
There is a copy mode.   Paint mode M333 covers the entire specified area,
A mode to make a uniformly painted copy of any other color
Is. The color balance mode M334 is
By adjusting the density of each of Y, M, C, Bk in the area,
Print with a different color balance (color tone) from the unspecified area
Mode.   Specific operations in this embodiment of the area designation mode M300
The operation method will be described sequentially with reference to FIG. First digitizer
-When the area designation key 424 on the 16 is pressed, the liquid crystal display is
Change to 0, place original on digitizer 16 and point to area
Specify with pen 421. When you press two points in the area, the display is
The screen changes to screen P310. Touch the screen P310 if the designated area is good.
Press the key a. Next, this specified area is displayed on screen P320
One of trimming, masking and image separation
Select and press the key. At this time, the designation is trimming or
For masking, press the touch key a on the screen P320.
Then, proceed to the next area designation. Select image separation on screen P320
If you have, go to screen P330, color conversion, paint, color
Select either mode or color balance. example
If the image in the specified area is printed in four colors of Y, M, C, and Bk
Touch key a (color mode) on screen P330
Press (D) to select from nine color modes on the screen P360
Press touch key a to print the area in 4 full colors
Is completed.   On screen P330, touch key b to specify color conversion.
When pressed, the display advances to screen P340,
Point that has the color information you want to convert
specify. Touch key on screen P341 if specified or position is OK
Press a to go to screen P370. Screen P370 shows the color finger after conversion.
Screen, standard color, specified color, registered color, and white
Specify one of them. Here, the converted color is
To select, press the touch key a on screen P370 to display screen P3
Yellow, magenta, cyan, black, red,
One of seven colors, green and blue, is specified here. Toes
The standard colors are the colors that the color copying machine has.
In the case of this embodiment, the information is printed at a ratio as shown in FIG.
Printed as just the middle density as the image density
It is to be done. However, the density of the specified color
Of course, there is a demand to make it a little lighter or darker,
Press the density designation key in the center of the screen P390 to
Color conversion can be performed by density.   Next, when touch key c (specified color) is selected on screen P370
Go to screen P380, specify the same method as the color coordinates before conversion
Use the point pen to specify the point that has the converted color information,
Go to screen P381. Again, the coordinates specified as described above
Color conversion by changing only the density without changing the color
Press the density adjustment key a at the center of the screen
Color conversion at the density of.   Next, on screen P370, the standard color and the desired color
When there is no color, the color registered in the color registration mode M710 described later
Color conversion can be performed using information. In this case, the screen
Press the touch key c on P370 to display the color registered on screen P391.
Press the touch key of the color number you want to use. even here
Change the registered color density without changing the ratio of each color component.
It can be adjusted by changing only. Also touch on screen P370
When the key c (white) is specified, the above-described masking mode M3
This has the same effect as 10.   Next, specify paint mode M333 of screen separation mode M330
Press the touch key c on the screen P330 to
Go to 70. The subsequent color specification after painting will be
The same operation as the setting method on screen P370 and later of the
Become.   On screen P330, the desired color
If you want to print in color (color), touch
(Balance). At this time, the display changes to screen P350,
Here, the yellow and magenta toner components of the printer
Touch-up to adjust the density of cyan, cyan and black
This is performed using Here, a black bar graph on the screen P350
Indicates the density specified status, and a scale or display will be displayed next to it.
It is easy to see. <Explanation of color create mode>   In the color create mode M400 shown in Fig. 41, the color model
Mode M410, color conversion mode 420, paint mode M430, shear
Five types of Punes mode M440 and color balance mode M450
One or a plurality of designations can be made from the above modes.   Here, the color mode M33 of the area designation mode M300
1, color conversion mode M332, paint mode M333, color balun
The difference from the Smote M334 is the color create mode M400.
Is applied to the entire document, not to a certain area of the document.
The function is just the same, but the other functions are exactly the same.
do. Therefore, the description of the above four modes is omitted.   Sharpness mode 440 is used to reduce the sharpness of the image.
In the adjustment mode, emphasis is added to the so-called character image.
The smoothing effect on the halftone dot image
This is the adjustment mode.   Next, the method for setting the color create mode is explained in Fig. 37.
The description will be made according to the drawings. Digitizer 16 Color Clear
When the Eight mode key 425 is pressed, the LCD display changes to screen P40.
The display changes to 0. On screen P400, touch key b (color
-Mode) to go to screen P410, where
Select a different color mode. Three color modes to choose
Select monochrome mode other than color and 4-color
When selecting, the display further proceeds to screen P411,
Can be selected. Touch P key c on screen P400
Press (S) to change to the screen P430 and
The sharpness can be adjusted. Screen p430
When you press the strong touch key i, the emphasis
The amount increases, especially when fine lines such as character images are copied neatly.
You. Pressing the weak touch key h will smooth the surrounding pixels.
The amount of so-called smoothing is increased,
Settings can be made so that moiré and the like in the original can be erased.   Also, color conversion mode M420, paint mode M430, color bar
The operation of Lance M450 is the same as the area designation mode,
Here, it is omitted. <Explanation of inset composite mode>   Inset composite mode M6 is used for documents like E and F in Fig. 42.
On the other hand, the designated color image area
Within the specified area (which may be a color image area)
Mode for moving and printing at the same magnification or magnification.
You.   The setting method of the inset composite mode is determined by the picture on the LCD panel.
The operation will be described with touch panel key operations. First digitizer
The original is placed on the coordinate detection board of the
Press the inset composite key 427, which is the entry key for
Then, the LCD screen changes from the standard screen P000 in Fig. 33 to the screen in Fig. 39.
Change to plane P600. Next, point to the color image area you want to move.
Two points on the diagonal line of the area are designated by the toppen 421. So
At the position specified on the LCD screen as the screen P610
The two dots that are almost similar to are displayed. Specify at this time
To change the selected area to another area, touch
Press key a to specify two points again. In the set area
If it is good, press the touch key b, and then move to the monochrome
Specify two diagonal points of the image area with the point pen 421,
If it is good, press the touch key c on the lower surface P630. At this time the LCD screen
The screen changes to screen P640, where the moving color image is doubled.
Specify the rate. When you want to fit a moving image at the same size
Press the touch key d and press the end touch key.
Is completed. At this time, as shown in A and B in Fig. 2-12, the moving image
If the image area is larger than the destination area, the destination area
When small, the open area is
Automatically controlled to print as a white image
You.   Next, the specified color image area was scaled and fitted
If not, touch the touch key e on the screen P640. At this time, the screen
The screen changes to P650, and the X direction (sub scanning direction) and the Y direction (main scanning
Direction) magnification, the zoom magnification mote operation method described above
Perform the same settings as above. First, the specified moving color image
If you want to fit the area with auto zooming with the same XY ratio,
Press the touch key g of P650 to reverse the key display.
In addition, the moving color image area has the same size as the moving destination area.
To print, touch the touch keys h and i on the screen P650.
And reverse. Also only in X direction or only in Y direction
When setting the manual magnification setting with the same XY ratio,
The setting can be set by pressing the touch-down key.   When the above setting operation is completed, press touch key j
Then, the screen returns to the standard screen P000 in Fig. 33, and the
The mode setting operation is completed. <Enlarged continuous shooting mode>   Enlarged continuous shooting mode M500 is for
If you copy at the set magnification to the specified area,
When the paper size exceeds the selected paper size, specify the setting magnification and
Automatically place originals in two or more areas according to paper size
And divide each part of the original into multiple sheets.
This mode is for outputting a copy. So these multiple
Easy to specify paper size by pasting copies
You can make larger copies.   The actual setting operation is performed first by using the enlarged
-426 is pressed, and the touch key a of the screen P500 in FIG. 38 is ended.
Press the OK key to complete the setting. After that, set the desired magnification and paper
Just choose. <Registration mode>   The registration mode M700 is the same as the color registration mode M710,
Ram mode M720 and manual feed size designation mode M730
Mode.   The color registration mode M710 is the same as the color creation mode described above.
Color conversion modes and panes of M400 and area designation mode M300
When the default mode is specified, the converted color can be registered in this mode.
it can. Zoom program mode M720
And the length of the copy paper size by entering the magnification
Calculation is performed automatically, and the resulting magnification is displayed on the standard screen P000.
This mode is displayed and then copied at that magnification.
The manual feed size designation mode M730 is compatible with this color copying machine.
Copying by manual feeding is possible in addition to cassette feeding at the top and bottom
In so-called APS (Auto Paper Select) mode, etc.
When you want to use, you can specify the size of the manual feed
Mode.   First, press the * key 402 on the operation unit shown in FIG.
Is displayed on the screen P700 in FIG. 40-1. Next, the color registration mode
To register the color of the M710, touch the screen P700.
-Press a to register colors to digitizer 16 on screen P710
The original is placed, and the color portion is designated with the point pen 421.   At this time, the screen changes to screen P711 and the registration number
Press the touch key of the number you want to set. In addition, other
To register a color, press the touch key d on screen P711 to
Returning to the plane P710, the setting is performed in the same procedure. Coordinates to be registered
Is completed, press touch key e to display screen P712
Press the touch key f which is the reading start key for
You.   After pressing the touch key f, the process of the flowchart shown in FIG.
It works according to the principle. First, turn on the halogen lamp 10 with S700
From the coordinates (sub-scanning direction) specified above in S701.
Calculate the number of moving pax of the stepping motor and
Original scanning unit 11 is moved by issuing a constant movement command
Let it. In S702, the line data capture mode is used.
Fig. 11-1 shows one line of the sub-scanning position specified
(A) is loaded into the RAM 78 '. In S703 this was taken
One line of data before the main scanning position specified by coordinates
After that, the average value of the eight pixels is calculated by the CPU 22 from the RAM 78 ',
To be stored. Did you read a specified number of registered coordinates in S704?
Is determined, and if so, the same processing as in the line is performed to S701.
When all readings have been completed, halogen run
The document scanning unit is turned off at the reference position H.P.
The operation is completed by returning to the position.   Next, on the screen P700, the touch key a (zoom program
Press (Rum) to change to the screen P720, where the original size
Up and down lengths of copy size
Set. The set value is displayed on screen P720 and
% Value of copy size / original size is now displayed.
ing. The calculation result is displayed as a magnification on the standard screen P000.
Is displayed at the position, and the magnification is set at the time of copying.   Next, on screen P700, touch key c (manual feed size designation)
Press to go to screen P730, where the paper
Specify the size. This mode is, for example, APS mode,
Enables zooming on manual paper.
It is.   Touch panel or digitizer in each mode
Numerical values and information set by inputting coordinates of
In the pre-arranged areas of RAM24 and RAM25.
Each is stored and the parameters are stored during the subsequent copy sequence.
Called and controlled as   Next, the service mode will be described.   First, press the * key 402 on the operation unit shown in FIG.
After changing the screen to screen P700 in Fig. 40-1, * key
Pressing 402 changes the display to the screen P800 in FIG. 40-2.
Next, when the black level adjustment of the present invention is to be performed, the screen P800
Press touch key a to display screen P850.
When the touch key 6 is pressed, a screen P852 is displayed. Screen P8
52. Touch key C and display C for CCD1 before copying
6. Load the black level signal of 1 line into the black level RAM 78
The mode is input. The indication of C is as shown in Fig. 40-2.
If not, set the mode that does not capture to RAM24, RAM24
Then, the character portion of the display of C is changed by touch key C input.
The mode to capture the black level signal if reverse is RA
Set to M24 and RAM25. The operation of touch key C
This is a toggle operation. Other service modes directly with the present invention
Explanation is omitted because there is no relationship.   Fig. 51 is equipped with a film projector (Fig. 24, 211).
The operation procedure of the operation unit when the device is mounted will be described. Film Projectier
After the connector 211 is connected, FIG.
When the mode selection key is turned on, the display on the LCD touch panel
Changes to P800. On this screen, whether the film is negative
Choose positive or not. For example, select a negative film here
Then, select P810, that is, select the film's ASA sensitivity.
Turn into a surface. Here, for example, select film sensitivity ASA100.
You. Of these, as detailed in the procedure described in FIG. 29,
Set the gabase film and set the P820 Shadings
By turning on the start key, the shading correction and the next
Set the negative film you want to print on the holder 215
When the copy button (Fig. 31 400) is turned on, the exposure voltage
After performing the AE operation to determine the
In particular, yellow, magenta, cyan, and Bk (black) in this order
Repeat the formation.   FIG. 46 is a flowchart showing the sequence control of the color copying apparatus.
It is a chart. The following description is based on the flow chart.
You. Press the copy key to turn on the halogen lamp in S100.
And the black correction mode, which is the operation described above in S101, and S102
Performs the white correction mode sensing process.   Here, the black correction mode in S101 will be described. Black correction
The mode is explained in Fig. 10 (a), (b), (c), (d)
As described above, the black reference value capture mode and black level data
Calculation mode and black correction mode for correcting actual image data
There is a code. Black level captured in black reference value capture mode
Data is susceptible to noise, as described above.
D Reduce the effect of noise in the main scanning direction in the arithmetic processing mode.
However, even if the main scanning of the CCD is repeated,
Similarly, the level change between CCD channels is small.
Movement is included. For that purpose, import as black level data
Data contains level differences between channels.
The color shift of the image between the channels.
Live. To avoid it, the above-mentioned service mode M800
ADJUST mode in (Fig. 40-2) DARK ADJ mode in M852
Press the touch key C to change the black level signal to the black level RA.
Set the mode to load to M78 in RAM24, 25, and set the black correction mode.
Mode set in RAM24, 25 in S101-1 in mode S101
The black level signal in S101-2 and S101-3.
In step S101-4, black correction is performed, and a copied image is confirmed. Copy
If color shift occurs between CCD channels after image confirmation
In this case, the copying operation is performed again to confirm the image. As a result, CC
Black level data with no color shift between D channels
When captured, DARK A in service mode M800 again
Pressing touch key C in DJ mode switches display C to reverse display
The black level signal is not taken into the black level RAM 78.
Mode to RAM24, 25, and after that, black correction mode S101
Of the previously captured black color without executing S101-2 and S101-3
The black correction of S101-4 is performed using the bell data.   Next, the specified color conversion is performed in the color conversion mode or the paint mode.
If it has been set, the color registration and designated color reading processing of S104 are performed.
Registered density data of the specified coordinates
Mode and specified color detection, respectively
You. This operation is as shown in FIG. S105 is manuscript
Judge whether the recognition mode is set, and
If the scanning unit 16 in S106-1 is
Scan for 435mm and use the CPU bus
To detect the position and size of the original. Also set
If not, the paper size selected in S106-2
Recognize the size and store this information in RAM24.
You. In S107, it is determined whether the movement mode is set.
And if it is set,
First, the original scanning unit 16 is moved to the original side.   Next, in S109, based on the information set by each mode
The gate of each function generated by RAMA136 or RAMB137
Create a bitmap for signal output.   FIG. 49 shows the RA of the information set in each mode described above.
It is a RAM map figure set to M24 and RAM25. AREA_MODE
Is the action within each specified area, eg paint, trie
It stores identification information of each mode such as the mining mode. AREA
_XY contains the document size and size information for each area.
AREA_ALPT is the information after color conversion, and the standard color or specified color is registered.
Information on the color recording is stored. AREA_ALPT_XY is AREA
_ALPT is the color coordinate information area when the specified color is specified.
AREA_DENS is the density adjustment data area after conversion.
You. AREA_PT_XY is the color coordinate before conversion in the color conversion mode.
AREA_CLMD is the information area, and the
Color mode information is stored.   REGI_COLOR is each color information registered in the color registration mode
Is stored and used as a registered color.
Even if the power is turned off when stored in the backup memory
Remembered.   Based on the above set information,
Create a group. First, store the size information of each area in Fig. 49
From AREA_XY, the coordinate data in the sub-scanning direction
Sorting to X_ADD area in order of smaller value
Then, sorting is performed in the main scanning direction in the same manner.   Next, the BIT_MAP position of the start point and end point of each area in the main scanning direction
Is set to "1", and the same operation is performed up to the coordinates of the end point of the sub-scan. This
The bit position to set "1" at the time of is RAMA136 or RAMB137
Corresponding to each gate signal generated by the
The bit position is determined by the mode. For example, in the manuscript area
Certain area 1 corresponds to TMAREA660, color balance specified
Area 5 corresponds to GAREA626. The same applies to the following
Bitmap for the area is in the BIT_MAP area in Fig. 50
create.   Next, in S109_1, the following processing is performed for the mode in each area.
Do. First, the area 2 is a color mode of cyan single color.
Are monochrome images for the four colors.
Even if video is sent out during development of area 2 in cyan,
Area 2 is printed with an image containing only the cyan component.
No yellow or magenta component image is printed.
If the selected area is selected in the single color mode,
In the case of the ND image,
MAREA564 is activated in the King coefficient register
The next coefficient is set in the selected register.   Next, the masking coefficient level at which MAREA564 is selected with “0”
The data stored in the RAM 23 of FIG.
(Use in 4 or 3 color mode). Next
Then, for the area 2 in the paint mode,
Each gate signal CH corresponding to the bit in the IMAP area
Each register in Fig.18 (a) selected by AREA0,1,2,3
Set the data in the data. First, for every input video
Y to convert_u159 to FF, y_l160 to 00, m_u161 to FF, m_l16
2 to 00, C_u163 to FF, C_lSet 00 to 164 and remember in Fig. 49
AREA_ALPT or REGI_COLOR for the converted color information
Load more and adjust the density of AREA_DENS for each color data.
Multiplied by the coefficients of the integer data, y'166, m'167, c'16
After conversion to 8, set the density data. For color conversion of area 4
On the other hand,_u159,…, c_lFigure 49 on 164 registers
A certain offset value is calculated for each density data before conversion.
Set each of the added ones, and likewise,
Set the data. In the color balance of region 5,
The gate signal GAREA626 is selected by "1".
Color balance when area specified in Fig. 49 is specified for C and Bk areas
From the value AREA_BLAN, set the data value described above and set GAREA
When 626 is set to “0”,
Set the data from the color balance BLANCE.   In S109, start command to printer via SRCOM516
And output. Shown in the timing chart of Fig. 47 in S110
You. Detect ITOP and output video signal of Y, M, C, Bk in S111
C₀, C₁, C_TwoSwitch, turning on the halogen lamp in S112
U. In S113, the end of each video scan was judged and ended
Then turn off the halogen lamp in S114, and in S114 and S115
Check the end of copying, and when finished, press
A stop command is output to the linter, and the copy ends.   FIG. 48 shows the division of the signal HINT517 output from the timer 28.
This is a flow chart of the loading process.
Check if the ping motor start timer has completed
Check the position and, when completed, run the stepper motor.
When it is completed, start the stepping motor and
BIT_MAP data of one line indicated by X_ADD shown in Fig. 50
Set the data to RAM136 or RAM137. Next interrupt in S201
The address of the data to be set is incremented by one. In S202
RAM136, RAM137 switching signal C_Three595, C_Four596, C₆Output 596
Then, in S203, the time until the next sub-scan switching is set in the timer 28.
The contents of BIT_MAM indicated by X_ADD below are sequentially stored in RAM 136 or
Is set in the RAM 137 to switch the gate signal.   In other words, the carriage moves in the sub-scanning direction and an interrupt occurs.
The processing content in the X direction is switched every time it is generated, and various color changes
Color processing such as replacement can be executed for each area.   As described above, according to the color copying apparatus of this embodiment,
Color mode becomes possible and free color reproduction becomes possible.
You.   In this embodiment, a color image using electrophotography is used.
Although the forming apparatus has been described as an example, the invention is not limited to electrophotography.
Apply various recording methods such as jet recording and thermal transfer recording
It is also possible. Also, a reading unit and an image type as a copying machine
Although the example where the components are arranged close to each other has been described,
Of course, the image information is transmitted by the communication line.
Lighting can be applied. [effect]   As described above, according to the present invention, each of a plurality of elements
Color with multiple image sensors composed of children
When reading an image using the reading means, a good offset
High-speed analog signal processing.
Reduction in cost and cost can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a digital color copying machine of this embodiment, FIG. 2 is a control block diagram of a reader controller, and FIG.
FIG. 4 shows the protocol of the motor driver 15 and the CPU 22 in FIG. 2, FIG. 4 (a) is a timing chart of control signals between the reader unit and the printer unit, and FIG. FIG. 4 (c) is a timing diagram of each signal on the signal line SRCOM, FIG. 5 is a detailed circuit diagram of the video processing unit of FIG. 2, and FIG. 6 (a) is a color diagram.
FIG. 6 (b) shows a signal timing diagram of each part in FIG. 6 (a), and FIG. 7 (a) shows a CCD drive signal generation circuit (circuit in the system control pulse generator 57). FIG. 7 (b) is a signal timing chart of each part of FIG. 7 (a), FIG. 8 (a) is a block diagram of the analog color signal processing circuit 44 of FIG. 5, and FIG. 8 (b) is 8th
Detailed circuit diagram of the CCD1 channel in the block of FIG.
FIG. 8 (c) is a signal timing diagram of each part of FIGS. 8 (a) and (b), FIG. 8 (d) is a drive timing diagram of the CCD, FIG. 8 (e) is an explanatory diagram of gain adjustment, FIG. 9 (a),
(B), (c) and (d) are explanatory diagrams for obtaining each line signal from the staggered sensor, FIG. 10 (a) is a black correction circuit diagram, and FIG.
10 (b), (c) and (d) are illustrations of black correction, FIG. 11 (a) is a white level correction circuit diagram, and FIGS. 11-1 (b) and (b).
(C) and (d) are explanatory diagrams of white level correction, FIGS. 11-2 (a), (b) and (c) are explanatory diagrams of CCD channel connection, and FIG. 11-3 is a channel connection process. Flow chart, Fig. 12 is an explanatory diagram of the line data capture mode,
FIG. 13 (a) is a logarithmic conversion circuit diagram, FIG. 13 (b) is a logarithmic conversion characteristic diagram, FIG. 14 is a spectral characteristic diagram of a reading sensor, FIG.
FIG. 16A is a diagram showing the spectral characteristics of the developing color toner, FIG. 16A is a circuit diagram of masking, inking, UCR, and FIG. 16B is a diagram showing selection signals C ₀ ,
FIG. 17 (a) shows the relationship between C ₁ and C ₂ and the color signal.
(B), (c), (d), (e), (f), and (g) are explanatory diagrams of generation of a region signal, and FIGS. 18 (a), (b), (c),
(D) and (e) are explanatory diagrams of color conversion, and FIGS.
(B), (c), (d) and (e) are illustrations of gamma conversion for color balance and color shading control, FIG. 19 (f) is a diagram showing a color balance adjustment method, and FIG. 20. (A), (b),
(C), (d), (e), (f), and (g) are explanatory diagrams of scaling control, and FIGS. 21 (a), (b), (c), (d),
(E), (f), and (g) are illustrations of edge enhancement and smoothing processing, FIG. 22 is a control circuit diagram of an operation panel unit,
FIG. 23 is a configuration diagram of a film projector, FIG. 24 is a diagram showing a relationship between a control input and a lighting voltage of a film exposure lamp,
FIGS. 25 (a), (b) and (c) are explanatory diagrams when using a film projector, and FIGS. 26 (A), (B) and (C) are PWM diagrams.
FIGS. 27 (A) and (B) are diagrams showing gradation correction characteristics, FIGS. 28 (A) and (B) are diagrams showing the relationship between a triangular wave and laser lighting time, and FIGS. (A) and (b) are control flow charts when using a film projector, FIG.
The figure shows a perspective view of the laser print section, FIG. 31 shows a top view of the operation section, FIG. 32 shows a top view of the digitizer, FIG. 33 shows a liquid crystal standard display screen, and FIG. FIGS. 35 (a) and 35 (b) are explanatory diagrams of operation in the movement mode.
FIG. 36 is an operation explanatory view of the area designation mode, FIG. 37 is an operational explanatory view of the color create mode, FIG. 38 is an operational explanatory view of the enlarged continuous shooting mode, FIG. 39 is an operational explanatory view of the inset composite mode, Fig. 40-1 is an explanatory diagram of the operation in the registration mode.
FIG. 2 is an explanatory diagram of a service mode, FIG. 41 is a functional diagram of the color copying apparatus of the present embodiment, FIG. 42 is an explanatory diagram of an inlay composite mode, FIG. 44 is a control flowchart in the color registration mode, FIG. 45 is a diagram showing color components of standard colors, FIG. 46 is a control flowchart of the whole system, FIG. 47 is a time chart of the whole system, and FIG. 48 is an interrupt control flow chart, FIG. 49 is a diagram showing a memory map of RAM, FIG. 50 is an explanatory diagram of a bit map, FIG. 51 is an explanatory diagram of operation of the projector, and FIG. 52 (a) is FIG. 52 (b) is a circuit diagram of the multiplier 258, FIG. 52 (b) is a diagram showing a code table thereof, FIG. 53 (a) is a circuit diagram of the multiplier 260 of FIG. 8 (b), and FIG. b) is a diagram showing the code table.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasumichi Suzuki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hiroshi Itagaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inside (72) Inventor Kenji Sasahara 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-60-251768 (JP, A) JP-A-60-90466 (JP) JP-A-61-71764 (JP, A) JP-A-55-64472 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04N 1/40-1/409 H04N 1/46 H04N 1/60

Claims (1)

(57) [Claims] A reading unit including a plurality of image sensors each including a plurality of elements; an offset processing unit for performing an offset process on an analog image signal read by the reading unit; and an output signal of the offset processing unit. Conversion means for performing conversion processing to a digital signal; and control for controlling an offset amount in the offset processing means based on both the analog image signal before being converted by the conversion means and the digital signal output from the conversion means. Means, and a plurality of the offset processing means are provided for each image sensor to enable parallel processing, and the conversion means is shared by the plurality of offset processing means. Image reading device. 2. 2. The image reading apparatus according to claim 1, wherein the reading unit reads a color image, and the plurality of offset processing units are provided for each color. 3. The image reading apparatus according to claim 1, wherein the plurality of image sensors are line image sensors.