JPS63125054A - Image reader - Google Patents

Abstract

PURPOSE:To prevent respective outputs from interfering one another by arranging plural reading sensors on a same substrate and driving all the reading sensors with synchronized transfer clock. CONSTITUTION:The color reading sensors divide a main scanning direction into five parts and respective chips 58-62 are formed on the same ceramic substrate. The first, third and fifth sensors (58, 60 and 62) are arranged on a same line LA and the second and fourth sensors are arranged on a line LB which is separated from the LA by four lines and they scan in an AL direction like an arrow in figure at the time of reading an original. As for respective five CCDs, those of the first, third and fifth sensors and those of the second and fourth sensors are separately and synchroneously driven with driving pulse group ODRV 518 and with driving pulse group EDRV 519 respectively. The pulses are generated from one reference oscillation source in order that they do not become jitters one another by the mutual interference and noises.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field> The present invention relates to an image reading device using a plurality of reading sensors.

<Prior art> In order to read the entire width of a document image with high resolution, a technique is known in which multiple line sensors are arranged in the main scanning direction and the output of each line sensor is connected to obtain an image signal for each line. There is.

If each line sensor is mounted on the same substrate in order to position the line sensor with high precision, image signals will be disturbed due to mutual interference of charge transfer clocks and charge reset pulses.

(Objective) In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an image reading device that prevents mutual interference of each output by driving all the reading sensors with synchronized transfer clocks. It is said that

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an example of a schematic internal configuration of a digital color image processing system according to the present invention. As shown in the figure, this system includes a digital color image reading device (hereinafter referred to as a color reader) 1 at the top and a digital color image printing device (hereinafter referred to as a color printer) 2 at the bottom. This color reader 1 includes color separation means and C
A photoelectric conversion element such as a CD reads the color image information of the original for each color and converts it into an electrical digital image signal. The color printer 2 is an electrophotographic laser beam color printer that reproduces a color image in each color according to the digital image signal, and records the image by transferring it to recording paper multiple times in the form of digital dots.

First, an overview of the color reader I will be explained.

3 is a document, 4 is a platen glass on which the document is placed, and 5 is a rod array for collecting a reflected light image from the document exposed and scanned by a halogen exposure lamp 1O, and inputting the image to a full-color sensor 6 of the same size. 5.6.7.
10 are integrated as a document scanning unit 11 as indicated by arrow A.
I-force direction exposure scan. The color separation image signals read every l line without exposure scanning are amplified to a predetermined voltage by the sensor output signal amplification circuit 7 and then sent to the signal line 5.
01, the signal is input to a video processing unit, which will be described later, and undergoes signal processing.

Details will be described later. 501 is a coaxial cable for ensuring faithful transmission of signals. A signal 502 is a signal line that supplies drive pulses for the same-magnification full-color sensor 6, and all necessary drive pulses are generated within the video processing unit 12. Reference numeral 8.9 denotes a white plate and a black plate for white level correction and black level correction of image signals, which will be described later. By irradiating them with a halogen exposure lamp 10, signal levels of predetermined densities can be obtained respectively, and the video signal Used for white level correction and black level correction. 13 is a control unit having a microcomputer, which is connected to bus 5.
08, the display on the operation panel 20, key manual control and video processing unit 12 control, position sensors Sl and S2 detect the position of the document scanning unit 11 via signal lines 509 and 510, and signal line 503 detects the position of the scanning unit 11. Stepping motor 14 for moving the
Stepper motor drive circuit control to pulse drive,
0N10FF control and light amount control of the halogen exposure lamp lO by the exposure lamp driver via the signal line 504; digitizer 16 and internal key via the signal line 505;
It performs all controls of the color reader part 1, such as controlling the display section.

The color image signal read by the above-mentioned exposure scanning unit 11 during original exposure scanning is input to the video processing unit 12 via the amplification circuit 7 and the signal line 501, and is subjected to various processing described later in this unit 12. and sent to the printer part 2 via the interface circuit 56.

Next, an outline of the color printer 2 will be explained. 711 is a scanner, which includes a laser output unit that converts an image signal from the color reader 1 into an optical signal, a polygon mirror 712 having a polyhedron (for example, an octahedron), a motor (not shown) that rotates this mirror 712, and an f/θ lens. (Imaging lens) 7
It has 13 mag. 714 is a reflecting mirror that changes the optical path of the laser beam, and 715 is a photosensitive drum. The laser beam emitted from the laser output section is reflected by a polygon mirror 712, passes through a lens 713 and a mirror 714, and linearly scans (raster scan) the surface of a photosensitive drum 715 to form a latent image corresponding to the original image. .

In addition, 717 is a primary charger, 718 is a full exposure lamp,
723 is a cleaner section that collects residual toner that has not been transferred; 724 is a pre-transfer charger; these members are arranged around the photosensitive drum 715.

726 is a developing device unit that develops the electrostatic latent image formed on the surface of the photosensitive drum 715 by laser exposure, and 731Y, 731M, 731C, and 7318 are developing sleeves that directly develop the image in contact with the photosensitive drum 715; 73
0Y, 730M, 730C, 730Bk hold spare toner (toner hopper, 732 is a screw for transporting developer, these sleeves 731Y~
7318, l-ner hoppers 730Y to 7308, and the screw 732 constitute a developing unit 726, and these members are arranged around the rotation axis P of the developing unit. For example, when forming a yellow toner image, develop the yellow toner at the position shown in this diagram.
When forming a magenta toner image, the developer unit 7
26 is rotated around the axis P in the figure, and the developing sleeve 731M in the magenta developing device is disposed at a position in contact with the photoreceptor 715. Cyan and black development operate in the same way.

Further, 716 is a transfer drum that transfers the toner image formed on the photosensitive drum 715 onto paper, 719 is an actuator plate for detecting the moving position of the transfer drum 716, and 720 is a drum that is in close proximity to this actuator plate 719. 725 is a transfer drum cleaner, 727 is a paper pressing roller, 728 is a static eliminator, and 729 is a transfer charger. These members 71
9.720.725.727°729 is the transfer roller 71
It is arranged around 6.

On the other hand, 735.736 is a paper feed cassette that stores paper (paper sheets), 737 and 738 are paper feed rollers that feed paper from the cassette 735.736, and 739.740.741
is a timing roller that takes the timing of paper feeding and conveyance, and the paper fed and conveyed via these is guided by a paper guide 749, and its leading edge is held by a gripper (to be described later) and wound around the transfer drum 716, forming an image. Shift to process.

Further, 550 is a drum rotation motor, which rotates the photosensitive drum 715.
and the transfer drum 716 are rotated synchronously. 750 is a peeling claw that removes the paper from the transfer drum 716 after the image forming process is completed, 742 is a conveyance belt that conveys the removed paper, and 743 is an image fixing unit that fixes the paper that has been conveyed by the conveyance belt 742. The image fixing section 743 has a pair of heat pressure rollers 744 and 745.

First, the league club control unit 13 according to the present invention will be explained with reference to FIG.

(Control unit) The control unit is CPU2 which is a microcomputer.
2, including a lamp driver 21.2 for video signal processing control, exposure and scanning. Stepping motor driver 15. Digitizer 16. The operation panel 20 is controlled by signal lines 508 (bus), 504, 503, and 505, respectively.
program ROM 23 to obtain the desired copy via the
．． RAM24. It is controlled organically according to the RAM 25. Non-volatility of the RAM 25 is ensured by a battery 31. Reference numeral 505 denotes a generally used signal line for serial communication, which is input by the operator from the digitizer 16 according to a protocol between the CPU 22 and the digitizer 16. That is, 505 is a signal line for inputting coordinates, area instructions, copy mode instructions, magnification ratio instructions, etc. when editing the original, for example, moving and composing two parts. A signal line 503 is connected to the CPU 2 for the motor driver 15.
The motor driver 15 inputs predetermined pulses to the stepping motor 14 according to instructions from the CPU 22, and gives the motor rotation operation. Serial I/F29
, 30 is a serial I/I such as Intel 8251.
This is a general type realized by LS1 for F, etc., and although it is not shown in the figure, it is a digitizer 16. The motor driver 15 also has a similar circuit. CPU22 and motor driver 1
The protocol of the interface between 5 and 5 is shown in FIG.

In addition, Sl and S2 are document exposure and scanning units (Fig. 11
), the home position is S1, and the white level correction of the image signal is performed at this location. S2 is a sensor that detects the presence of the original exposure scanning unit at the leading edge of the image, and this position becomes the reference position of the original.

(Printer interface) Signals ITOP, BD, VCLK, VID in Figure 2
E.O.

H3YNC and SRCOM (511 to 516) are signals for the interface between the color printer section 2 and the league section 1 in FIG. 1, respectively. The image signal VIDEO 514 read by the league section 1 is all sent to the color printer section 2 based on the above signals. ITOP is a synchronization signal in the image forwarding direction (hereinafter referred to as the sub-scanning direction), and is 1
This occurs once for sending out the screen, that is, once for each of the four color images (yellow, magenta, cyan, and Bk), for a total of four times. When the leading edge of the transfer paper receives the toner image transfer at the contact point with the photosensitive drum 715, the transfer drum 716. It is synchronized with the rotation of the photosensitive drum 715, and is sent to the video processing unit in the reader 1, and further to the CPU 2 in the controller 13.
It is input as a second interrupt (signal 511). CPU2
2 performs image control in the sub-scanning direction for editing and the like based on ITOF interrupts. BD512 is polygon mirror 7
Once every 12 rotations, i.e. once every l raster scan
This is a synchronization signal in the raster scan direction (hereinafter referred to as the main scanning direction) that is generated twice, and the image signal read by the reader unit 1 is sent line by line in the main scanning direction to the printer unit 2 in synchronization with the BD. be done.

VCLK513 is an 8-bit digital video signal 514
This is a synchronous clock for sending the color printer unit 2 to the color printer unit 2, and for example, as shown in FIG. 4(b), the flip-flop 32
．． Video data 514 is sent out via 35. H5Y
NC515 is generated from the BD signal 512 in synchronization with VCLK513. It is a main scanning direction synchronization signal and has the same period as the BD, and strictly speaking, the VIDEO signal 514 is H3Y
It is sent out in synchronization with NC515. This is BD signal 51
5 is generated in synchronization with the rotation of the polygon mirror, it contains a lot of jitter from the motor that rotates the polygon mirror 712, and if the BD double signal is synchronized as it is, jitter will occur in the image, so there is no jitter based on the BD double signal. VCL
This is because HSYNC515, which is generated in synchronization with K, is required. SRCOM is a signal line for half-duplex bidirectional serial communication, and as shown in Figure 4 (C), the synchronization signal CBUSY (command busy) is sent from the reader section.
A command CM is sent out in synchronization with the 8-bit serial clock 5CLK between
Status ST is returned in synchronization with the 8-bit serial clock between SY (status busy). In this timing chart, the status “
3CH" was returned, and the mutual exchange of instructions from the reader section to the printer section, such as color mode, cassette selection, etc., and printer section status information, such as jam, paper out, weight, etc. All this communication line SR
This is done via COM.

FIG. 4(a) shows a timing chart for transmitting one four-color full-color image based on ITOF and HSYNC. ITOP511 is one rotation of transfer drum 716, or two rotations of transfer drum 716.
The image data generated once per rotation is a yellow image in ■, a magenta image in ■, a cyan image in ■, and a Bk image in ■. It is formed. HSYN
C is, for example, 420 mm if the A3 image is 420 mm in the longitudinal direction and the image density in the feeding direction is 16 pe 12/mm.
0X16 = 6720 times, and this is simultaneously input to the clock input to the timer circuit 28 in the controller circuit 13, which causes an interrupt HINT517 to be applied to the CPU 22 after counting a predetermined number of times. . Thereby, the CPU 22 performs image control in the feeding direction, such as control of sampling and movement.

(Video Processing Unit) Next, the video processing unit 12 will be described in detail according to FIG. 5 and subsequent figures. The document is first irradiated by the exposure lamp 10 (FIGS. 1 and 2), and the reflected light is separated into colors for each image by the color reading sensor 6 in the scanning unit 11 and read, and the amplifier circuit 42 adjusts the light to a predetermined level. amplified.

41 is a COD driver that supplies pulse signals for driving the color reading sensor, and the necessary pulse source is generated by the system control pulse generator 57. FIG. 6 shows the color reading sensor and drive pulses. Figure 6(a) shows the color reading sensor used in this example, which is divided into 5 parts in the main scanning direction to read 6 parts.
With 2.5 μm (1716 mm) as one pixel, 10
24 pixels, that is, as shown in the figure (one pixel is G in the main scanning direction,
B.

Divided into 3 by R, total 1024X3=30
It has 72 effective pixels. On the other hand, each chip 58-62
are formed on the same ceramic substrate, and the 1.3° fifth sensor (58, 60, 62) is on the same line LA,
゜The fourth line is 4 lines (62.5 μm x 4 = 2
50 μm) on the line LB, and scans in the direction of the arrow AL force when reading a document. 5 CCDs each
The 1st, 3.5th is the drive pa/lz7. Group 0DR
V518, and the second and fourth EDRV519 are driven independently and synchronously. 0OIA, 002A, OR5 and EDRV519 included in 0DRV518
i,: EOIA, EO2A, and ERS included are a charge transfer clock and a charge reset pulse within each sensor, respectively; 1, 3. Due to mutual interference and noise limitations between the 5th and 2nd and 4th signals, they are generated in perfect synchronization so that there is no jitter between them. For this reason, these pulses are generated from one reference oscillator source 08C58' (FIG. 5). 7th
Figure (a) shows 0DRV518. The circuit block that generates EDRV519, FIG. 7(b) is a timing chart, and FIG. 5 is a system control pulse generator 5.
Included in 7. 0535 is a clock frequency-divided from the original clock 0LKO generated by a single 0SC58'.
Reference signal 5 that determines the generation timing of DRV and EDRV
This is the clock that generates YNC2, 5YNC3, and 5Y
NC2, 5YNC3 is a presettable counter 64.NC3 set by a signal line 539 connected to one CPU bus.
The output timing is determined according to the setting value of 65, and 5Y
NC2, 5YNC3 initializes the frequency divider 66.67 and the drive pulse generator 68.69.

That is, the CLKO output from one oscillation source O3C is based on H3YNC515 input to this block.
Since they are all generated by frequency-divided clocks that are generated synchronously, each pulse group of 0DRV518 and EDRV519 is obtained as a synchronous signal with no jitter at all, and it is possible to prevent signal disturbance due to interference between sensors. . Here, the sensor drive pulses 0DRV518 obtained in synchronization with each other are applied to the 5th sensor at l, 3°.
V519 is supplied to the 2nd and 4th sensors, each sensor 5
8. 59.60. 61 and 62, video signals v1 to v5 are independently outputted in synchronization with the drive pulse, and are amplified to a predetermined voltage value by an independent amplifier circuit 42 for each channel as shown in FIG. (Figure 1)
Through Fig. 6(b) (7) OO3529 (7) 9 iming”?-Vl, V3゜v5 is EO3534 (7)
V2 at the timing. The V4(7) signal is sent out and input to the video processing unit.

The color image signal obtained by dividing the original input into the video processing unit 12 into five parts and reading it is converted into G (green) by the sample hold circuit S/H 43.

The signal is separated into three colors, B (blue) and R (red).Thus, after S/H, there are 3×5=15 signal processing systems. FIG. 8(b) shows the timing chart obtained for the digital data A/D out that has been sampled and held for one channel, amplified, and then input to the A/D conversion circuit 45 and multiplexed. show. FIG. 8(a) shows a processing block diagram.

Analog color image signals read by the aforementioned 5-chip 1x color sensor are divided into 8th and 8th channels for each of the 5 channels.
The signals are respectively input to the analog color signal processing circuit shown in FIG. Since circuits A to E corresponding to each channel are the same circuit, circuit A will be explained together with the waveform timing shown in FIG. 8(b).

The input analog color signal is shown in Figure 8(b) 5iG
A (in the order of G-+B-+R), the sample-hold circuit (S/H) 250 samples and holds each color (pulse 5HG535.5) (B536, 5HR53)
7 to convert each color in parallel. FIG. 8(b) VDGI,
VDBI.

VDRI (538-540) Here, the signals 538-540 separated for each color are offset (0 characteristic in Figure 8 (C)) adjusted by amplifiers 251-253, and then filtered by low-pass filters (LPF) 254-256. After the bands other than the signal components are cassetted, the amplifiers 257 to 259 perform gain adjustment (FIG. 8 (C) G characteristic), and then the pulse GSEL is applied again to multiplex into one signal system.

MP by BSEL, RSEL (544-546)
It becomes one system with X260, and is A/D converted and converted into a digital value (ADOUT547). In this configuration, MPX2
Since it is multiplexed at 60 and then A/D converted,
G.

A total of 15 color signals of 5 channels of 63 B and R colors are processed by five A/D converters. The same applies to the BE circuit.

Next, in this embodiment, as mentioned above, 4 lines (62.5μ
Since the document is read using five staggered sensors that are spaced apart in the sub-scanning direction (m x 4 = 250 μm) and divided into five areas in the main-scanning direction, as shown in FIG. The reading positions of channels 2 and 4 being scanned and the remaining channels 1 and 3.5 are shifted.

Therefore, in order to connect this correctly, we use memory for multiple lines. FIG. 9(b) shows the memory configuration of this embodiment, and 70 to 74 are memories each storing a plurality of duplicates, and have a FiFo configuration. That is, 7
0.72.74 has a capacity of 5 lines with 1024 pixels per line, and 71.73 has a capacity of 15 lines. Data is written one line at a time from the point indicated by last pointers WPO75 and WPE76, and data is written for one line at a time. When the minute writing is completed, WPO or WPE is incremented by +1. WPO75 is channel l.

3.5, and WPE76 is common to 2.4.

0WR3T540. EWR3T541 is a signal that initializes the values of the respective line pointers WPO75 and WPE76 and returns them to the beginning, and 0R3T542. ER3T543
is a signal that returns the value of the read pointer (pointer at the time of reading) to the beginning. Let's take channels 1 and 2 as an example. As shown in FIG. 9(a) (channel 2 is ahead of channel 1 by 4 lines, so channel 2 reads and writes to the FiFo memory 71 for the same line, for example, line ■, and 4 lines later, Channel 1 reads line ■. Therefore, if WPE is advanced by 4 from the memory write pointer WPO,
When read from the FiFo memory using the read point value of - for each read time, the same line is read for channels 1.3.5 and 2.4, and the deviation in the sub-scanning direction has been corrected. For example, in FIG. 9(b), in channel 1, WPO is at the first line 1 of the memory, and at the same time, in channel 2, WPE is pointing to line 5, which is the fifth line from the beginning. If you start from this point, WPO
When the pointer indicates 5, the WPE indicates 9, and the line ■ on the document is written in the area where the pointer is 5, and from then on, the RPO
, RPE (read pointer) can be read out cyclically while advancing both in the same way. FIG. 9(C) is a timing chart for performing the above-mentioned control,
Image data is sent one line at a time in synchronization with H3YNC515. EWR3T541 and 0WR5T540 are generated with a difference of 4 lines as shown in the figure, and 0R3T
542 is FiF.

For the capacity of memory 70, 72, 74, and therefore every 5 lines, ERST 543 is generated every 15 lines for the same reason. On the other hand, when reading, first, channel 1, one line at 5 times the speed, and then channel 2.

Similarly, by sequentially reading out one line, then channels 3, 4, and 5, continuous signals from channels 1 to 5 can be obtained during IHSYNC. Figure 9(d) IRD~5RD (544~548
) indicates the valid period signal of the read operation of each channel. A control signal for controlling image connection between channels using the present FiFo memory is generated by a memory control circuit 57' in FIG.

The circuit 57' is composed of a discrete circuit such as TTL, but since this is not the gist of the present invention, a description thereof will be omitted. Further, the memory has three colors of an image, namely, a blue component, a green component, and a red component, but since they have the same configuration, the explanation will be limited to only one of them.

FIG. 10(a) shows a black correction circuit. As shown in FIG. 1O(b), when the amount of light input to the sensor is small, the black level outputs of channels 1 to 5 vary greatly among the nine pixels between the chips. If this is output as is and an image is output, streaks and unevenness will occur in the data portion of the image.

Therefore, it is necessary to correct the output variation of this black part,
Correction is performed using a circuit as shown in FIG. 10(a). Prior to the copying operation, the original scanning unit is moved to the position of a black plate with uniform density disposed in a non-image area at the tip of the original platen,
Turn on the halogen and input the black level image signal to this circuit. In order to store one line of this image data in the black level RAM 78, A is selected with the selector 82 (■), the gate 80 is closed (■), and 81 is opened (i.e., the data line is
51 → 552 → 553, and on the other hand, address counter 8 is initialized with 1 input for RAM address input.
In order for the output of 4 to be input, the signal ■ is output, and 1542 black level signals are stored in the RAM 78 (black reference value import mode). When loading images, RAM78
becomes the data read mode, and the data line 553 → 55
Each line and each pixel are read out and input to the B input of the subtracter 79 through the path No. 7. That is, at this time, the gate 81 is closed (■) and the gate 80 is open (■).

Therefore, the black level output 556 is the black level data DK(i
), for example, in the case of a blue signal, Bin (i) −
DK) = Bout (i) (black correction mode).

Similarly, Green Gin and Red Rin are also 77G, 7
Similar control is performed by 7R. Further, the control lines (1), (2), (2), (2) of each selector gate for this control are controlled by the CPU (FIG. 2, 22) by a latch 85 assigned as Ilo.

Next, white level correction (shading correction) will be explained with reference to FIG. White level correction corrects variations in sensitivity of the illumination system, optical system, and sensor based on white data obtained when the document scanning unit is moved to the position of a uniform white plate and irradiated. The basic circuit configuration is shown in FIG. 11(a). The basic circuit configuration is the same as that shown in FIG. 10(a), but the only difference is that black correction uses a subtracter 79, while white correction uses a multiplier 79'. Therefore, explanation of the same parts will be omitted. During color correction, first, when the document scanning unit is at the uniform white plate position (home position),
That is, prior to a copying operation or a reading operation, an exposure lamp is turned on and image data at a uniform white level is stored in the correction RAM 78' for one line. For example, if it has an A4 longitudinal width in the main scanning direction, 16pej! 1 in /mm
6 x 297 mm = 4752 pixels, or at least the RAM capacity is 4752 bytes, as shown in Figure 11 (
b) <, I-th pixel white board data Wi (i=1~
4752), the RAM 78' will contain the data shown in Figure 11 (C
), data for the white plate for each pixel is stored. On the other hand, with respect to Wi, the data D after being corrected is the read value Di of the normal image of the i-th pixel.

=DiXFFH/Wi. Therefore, from the CPU in the controller (Fig. 2 22), the latch 85'■
′, ■′, ■′, ■′, gate 80′ is closed, gate 81′ is opened, and selectors 82′, 83′ are opened.
When B is selected, the RAM 78' is
Enable PU access. Next, FF is applied to the first pixel Wo.
Data replacement is performed by sequentially calculating FF/W, . . . for H/Wo, W. Once the blue component of the color component image is completed (Step B in FIG. 11(d)), the green component (Step G) and the red component (Step R) are similarly performed sequentially for the original image data Di input thereafter.

Gate 80' is open (■') and gate 81' is closed (■') so that = D i
), selector 83' selects A, and RAM 78'
Coefficient data read from F F H/W i
passes through signal lines 553→557, is multiplied by the original image data 551 input from the negative side, and is output.

With the above configuration and operation, speeding up has been achieved, and correction for each pixel has become possible.

Furthermore, in this configuration, 1542 minutes of image data can be input at high speed, and the CPU 22 can access the RD and WR, so that it can be used to input any position on the document, for example, the coordinates (x m m, y m m
), move the scanning unit by (16XX) lines in the X direction, and store this line in the RAM 78' by the same operation as described above.
By reading the data of the (16th Xy) pixel, the component ratios of B, G, and H can be detected (hereinafter, this operation will be referred to as "line data capture mode"). Furthermore, with this configuration, a person skilled in the art can easily infer that the average of multiple lines (hereinafter referred to as "average value calculation mode") density histogram (hereinafter referred to as "histogram mode") can be easily obtained. Dew.

As described above, the black level and white level are corrected based on factors such as the black level sensitivity of the image input system, dark current variations, variations between each sensor, optical system light intensity variations, and white level sensitivity, and are corrected in the main scanning direction. The uniform color image data proportional to the input light amount is input to the logarithmic conversion circuit 86 (FIG. 5) in accordance with the relative luminous efficiency characteristics of the human eye. Here, white=008. The image source that is converted to black = FFH and is further input to the image reading sensor, such as a normal reflective original, a transparent original such as a film projector, and even the same transparent original as negative film, positive film, or the sensitivity and exposure of the film. Since the input gamma characteristics are different depending on the state, Fig. 13 (
As shown in a) and (b), the LU for logarithmic transformation
It has multiple T (lookup tables) and uses them depending on the purpose. To switch, signal line 1 go, l
gl, 1 g2 (560-562), and is performed by inputting an instruction from an operation unit or the like as the I10 port of the CPU (22). Here, each B, G,
The data output for R corresponds to the density value of the output image, the output for B (blue) is the amount of yellow toner, the amount of magenta toner for G (green), and the amount of magenta toner for R (red). corresponds to the amount of cyan toner, so subsequent color image data will be associated with Y, M, and C.

Image data of each color component from the original image obtained by logarithmic conversion, that is, yellow component and magenta component.

The following color correction is performed on the cyan component. As shown in Figure 14, the spectral characteristics of the color separation filters arranged for each pixel in the color reading sensor have unnecessary transmission areas as shown in the diagonal lines. It is known that toner (Y, M, C) also has unnecessary absorption components as shown in FIG. 15. Therefore, each color component image data Yi, Mi.

Masking correction is well known in which color correction is performed by calculating a linear equation for each color for Ci. Furthermore, by Yi, Mi, Ci, Min (Yi, Mi, Ci) (Yi, Mi
, the minimum value of Ci) and use it as a sumi (black)
Afterwards, an operation to add black toner (smear removal) and an under color removal (UCR) operation to reduce the amount of each coloring material added according to the added black component are also often performed. FIG. 16(a) shows the masking, indentation, and UCR circuit configurations. The characteristics of this configuration are: - It has two masking matrices, and can be switched at high speed with one signal line "Ilo" - With and without UCR, the signal line "110" allows high speed ■It has two circuits that determine the amount of smear, and can be switched at high speed with "110". First, prior to image reading, a desired first matrix coefficient M1. Second matrix count M2
is set from the bus connected to the CPU 22. In this example, Ml is in registers 87-95, M2 is in registers 96-10/
is set to [. Also 111-122.135.
131 are selectors, which select A when the S terminal is "1" and select B when the S terminal is "0". Therefore, when selecting matrix M1, switching signal MAREA564=
, "B" is set to "0" when matrix M2 is selected. 123 is a selector, and selection signals C0, C,
By (566, 567), outputs a, b, and c are obtained based on the truth table shown in FIG. 16(b). Selection signal C
8, C3 and C2 correspond to color signals to be output,
For example, Y, M, C, Bk (7) order! , :(C2゜Cl+ co) = (0,0,0), (0,0,
1), (0°1, O), (1, O, O), and then (0, 1, 1) as a monochrome signal to obtain a desired color-corrected color signal. Now (Co, CII
C2)=(0+0.0) and MAREA="B," the output of the selector 123 (an b+c)
contains the contents of register 87°88.89,
x, -bMt, -CCI) are output. On the other hand, Min (Yi,
The black component signal 574 calculated as . 125. It is input to the B input of 126. Each subtractor 124 to 126 uses Y=Y as undercolor removal.
i-(ak-b), M=M i-(a
k-b), C=Ci-(a k-b) are calculated and input to multipliers 127, 128, 129 for masking calculations via signal lines 577, 578, 579. The selector 135 is controlled by the signal UAREA565, and the UAREA565 has a configuration that enables high-speed switching between UCR (undercolor removal), presence, and absence using "Ilo". Multiplier 127.128°12
9D has (ayx, -bMt,
-Cct), B input has the above-mentioned (Yi -(ak-b
), Mi −(ak-b), Ci −(ak-b)
) = (Yi, Mi, C4] are input, so as is clear from the figure, the output Dout has Yout=0 under the condition of C2=0 (Y or M or C selection).
Yix (ayt) +Mix (-bMl) 10Ci
x (-ccl) is obtained, and yellow image data that has been subjected to masking color correction and undercolor removal processing is obtained. Similarly, Mout = Yix (-aY2) + MiX (bM2) +C
1x(-CC2)Cout=YiX(-aY3)+Mi
X(-bM3)+CiX(CC3) is output to Dout. Color selection is controlled by the CPU 22 according to the development order of the color printer (COr CI +C2) according to the table in FIG. 16(b) as described above. Registers 105 to 107 and 108 to 110 are registers for monochrome image formation, and based on the same principle as the masking color correction described above, MONO=k +, Yi+ 1 ,
Weighting of each color by Mi+m HCi is obtained by addition. Switching signal MAREA564゜UAREA56
5. As mentioned above, KAREA587 performs high-speed switching of coefficient matrices M1 and M2 for masking color correction, and UAR
EA565 has high-speed switching with and without UCR, KA
The REA 587 performs linear conversion switching of the black component signal (output to Dout through the signal line 569 → selector 131), that is, K = M i n (Y i , M i
.

Ci), Y=ck-d or Y=e3-f (c,
d.

(e, f are constant parameters) are signals that can quickly change the characteristics of the copy screen. It has become. Therefore, this configuration can be applied when images obtained from image input sources with different color separation characteristics or a plurality of images with different black tones are combined as in this embodiment. Note that these area signals MAREA, UAREA, KAREA (56
4,565°587) is generated by an area generation circuit (FIG. 2, 51), which will be described later.

FIG. 17 is a diagram for explaining area signal generation (the aforementioned MAREA564°UAREA565.KAREA587, etc.). The area refers to the shaded area in FIG.
Timing chart A in Figure 17(e) for each line
It is distinguished from other areas by a signal such as REA. Each area is designated by the digitizer 16 of FIG. Figure 17(a)~
(d) shows a configuration in which the number of generation positions of this area signal, each having a length of one section and nine sections, is programmable by the CPU 22 and can be obtained in large numbers. In this configuration, one area signal is generated by one bit of RAM that can be accessed by the CPU, and for example, n area signals ARE A O=A
In order to obtain RE A n, two n-bit RAMs are used.
It has one. (η・.

17(d) 136.137). Now, Figure 17 (b)
If we obtain area signals AREAO and AREAn such as, bit 0 of RAM address X l r x3
Set “1” to “1”, and all bits 0 of the remaining addresses are “0”
Make it. On the other hand, RAM address L xl l X2
+ Put “B” in x4 and set bit n of other address.
are all set to “0”. When data in the RAM is sequentially read in synchronization with a constant clock using H3YNC as a reference, data "1" is read out at addresses X and X3, for example, as shown in FIG. 17(C).

This read data is 148-0 in FIG. 17(d).
~148- J of flip-flop to J- of n.

I (Since it is input to both terminals, the output is a toggle operation. That is, when "B" is read from the RAM and CLK is input, the output changes from "O" to "1" and from "l" to "0". te, ARE
Interval signals such as AO and therefore area signals are generated. Furthermore, if data = "0" across all addresses, no area section is generated and no area is set. Figure 17 (
d) is the present circuit configuration, and 136.137 is the above-mentioned I
It is 2AM. In order to switch the area section at high speed, for example, while data is being read from RAMA 136 line by line, C
PU22 (Figure 2) performs memory write operations for different area settings, and alternately generates sections and C
Switch memory writing from PU. Therefore, the first
If you specify the shaded area in Figure 7 (f), A→B-A-B
→RAMA and RAMB are switched as shown in A, which means (C3, C4, C3) = (0
, 1, O), the counter output counted by VCLK is passed through the selector 139 as an address to the RA
It is applied to MA 136 (Aa), gate 142 is opened, gate 144 is closed, and is read from RAMA 136, and the entire bit width, n bits, is transferred to flip-flop 148- to J-.
0 to 148-n, and A depending on the set value.
A period signal of RE A ONA RE A n is generated. Writing from the CPU to B is performed during this time using the address bus A-Bus, data bus D-Bus, and access signal R/W. Conversely, when generating section signals based on data set in RAMB137 (C3, C4
, C3) = (1, 0, 1), the same operation can be performed and data can be written from the CPU to the RAM 136. (Hereafter, these two RAMs will be referred to as A-RAM,
B-RAMSC3, C4゜C5 are connected to AREA control signal (A
RCNT)...C3+C4,C5 are CPU I
(output from port 10).

FIG. 17(g) shows a correspondence table between each bit and signal name.

Next, a circuit configuration for color conversion will be shown according to FIG.

Color conversion here means that when each color component data (Y i , M i , Ci ) input to this circuit has a certain color density or a color component ratio, it is converted into another color. say something to replace it with. For example, only the red (shaded area) part of the original in FIG. 18(c) is changed to blue. First, each color data (Y
i, M i, Ci) is the averaging circuit 149
．． The average is taken in units of 8 pixels at 150° 151, and (Y i + M i + Ci) is calculated by the adder 155 on one side, and sent to the B input of the divider 152° 153 and 154, and on the other side to the 6 inputs each. The input color component ratio is yellow ratio ray=Yi/Yi 10M i 10Ci
, ? Zenta ratio r a m = M i / Y i
+ M i + Ci, cyan ratio r a c =
Ci/Yi+Mi+Ci are obtained as signal lines 604, 605, and 606, respectively, and input to window comparators 156-158. Here, the comparison upper and lower limit values of each color component set from the CPU bus, and therefore (y u , m u , cu
) and (yI!, mp, cj7), that is, when yz≦ray<yu, the output is “1”.
″.

mI! When ≦ram < m u, output = “l”, C
4! When ≦rac<CU, the output = “1”, and when the above three conditions are met, it is determined that the input color is the desired color, and the output of the 3-man AND165 becomes 1, and the selector 1
It is input to 75 to 80 manpower. The adder 155 is a CPU
Signal line CHGCNT output from I10 port of 22
607 output 603=1 is output. Therefore, when the value is "0", the outputs of the dividers 152, 153, and 154 are the outputs of A's power as they are. That is, at this time, registers 159 to 16
4 is set with the desired color component ratio (and color density data). 175 is a selector with 4 inputs and 1 output, and inputs 1, 2, and 3 contain the desired color after conversion. Data are input as Y component, 2 open component, and C component, respectively, while data Vin, in which masking color correction and UCR have been applied to the scanned original image, is input to 4.
6. Connected to Dout in FIG. 6(a).

Switching human power S. is "l" when the color detection is "true", that is, a predetermined color is detected, and "0" otherwise.
is the area signal CHA RE A' 615 generated by the area generation circuit shown in FIG. 17(d), and is "1" in the specified area.

When it is “0” outside the area and “1”, color conversion is performed,
When it is “0”, it will not be hit. S2,83ManpowerC6゜C,(6
16,617) is co of FIG. 16(a).

It is the same as the C1 signal, and (Co, CI) = (0
,0).

When (0,l) and (1,0), yellow and magenta images are formed on a color printer, respectively.

Perform cyan image formation. The truth table of the selector 175 is shown in FIG. 18(b). Registers 166 to 168 store desired color component ratios or color component density data after conversion.
Set from U. When y', m', and c' are color component ratios, CHGCNT607 is set to '1', so the output 603 of the adder 155 is (Y i +
M i 10 i ) and is input to the B inputs of the multipliers 169 to 171, so the selector input 1. 2. 3
(Yi+Mi+C1)xy' and (Yi+
Mi+Ci)xm'.

(Yi+Mi+C1)xc' is input and color-converted according to the truth table of FIG. 18(b). On the other hand, when V', ', and C' are configuration data, CHGCNT is set to "0" and signal 603 is set to "0".
“1”, therefore, the outputs of the multipliers 169 to 171, and therefore the inputs 1.2.3 of the selector 175 have the data (y',
m', c') are input as they are, and color conversion is performed by replacing the color component density data. The area signal CHAREA'615 is the section length as described above.

Since the number can be set arbitrarily, this color conversion can be applied only to multiple regions rI + r2 + r3 as shown in Figure 18(d), or by preparing multiple circuits as shown in Figure 18(a), for example, the area r, inside is red → blue, inside r2 is red → yellow, r3
Color conversion across multiple areas and multiple colors, such as changing from white inside to red, becomes possible at high speed and in real time. This includes a plurality of color detection → conversion circuits that are the same as the circuit described above, and the selector 230 selects the outputs A, B, and B of each circuit.
The data required from C and D is CH3ELO and CH5ELI.
is selected and output to output 619. Also, the area signals applied to each circuit are CHAREAO~3, and CH
3EL0,1 are also generated by the area generating circuit 51 as shown in FIG. 17(d).

Figure 19 shows a gamma conversion circuit for controlling the color balance and color shading of the output image in this system.Basically, it is a data conversion using an LUT (look-up table), and it is controlled by the operation unit. The data in the LUT is rewritten in association with the input designation. RA for LUT
When writing data to M177, select signal line RAM5
By setting L623=10'', selector 176 is set to B
The input is selected, gate 178 is closed and gate 179 is opened, buses ABUS and DBUS (address data) from CPU 22 are connected to RAM 177, and data is written or read. - After the carrier conversion table is created, RAM5L623 = “l” and Din6
The video input from 20 is input to the address input of RAM 177, addressed with video data, and desired data is output from the RAM and input to the next stage magnification control circuit through opened gate 178. Also, this gamma RA
M is yellow.

There are 5 types, magenta, cyan, black, MONO, and at least 2 types (Fig. 19 (b) A and B), and the switching for each color is CO + C, , C2 ( as in Fig. 16).
566, 567, 568) and also by GARA626 generated by the area generating circuit FIG.
For example, as shown in FIG. 19-(C), the area A has a gamma characteristic of A, and the area B has a gamma characteristic of B, so that they can be obtained as a single print.

This gamma RAM has two types of variable power characteristics, A and B.
Although we have made it possible to switch quickly for each area, by adding more, it is also possible to switch even more characteristics at high speed. Dout 625 in FIG. 19(a) is input to the input Din 626 of the next stage magnification control circuit in FIG. 20(a).

Further, as is clear from the figure, the characteristics of this gamma conversion RAM can be changed individually for each color, and the characteristics can be changed by the CPU 22 in association with operations from the liquid crystal touch panel keys on the operation panel. For example, Figure 33 p.
ooo When the operator touches the density adjustment key e or f on the (standard screen), if the operator touches e from the center O,
As shown in Fig. 19(d) and (e), the settings move to the left from -1 to -2, and the characteristics in the RAM 177 also change from -1 to -2 to -3 to -4.
It is selected and rewritten as follows. Conversely, if you touch f, the characteristics will be selected as +1 → +2 → +3 → +4 and RAM177
can be rewritten in the same way. That is, on the standard screen,
By touching the e or f key, Y, M, C,
All tables of Bk or MONO (RAM177)
can be rewritten and the density can be adjusted without changing the color tone. On the other hand, on the screen P420 in FIG. 37 (color create mode, color balance adjustment), the color balance must be adjusted (for Y, M, C, and Bk, only the areas in the RAM 177 are rewritten individually. , for example, when changing the color tone of the yellow component, screen P420
When the inner touch key y1 is pressed, the black band display extends upward, and the conversion characteristic changes to the y1 direction, as shown in FIG.
If you touch , the characteristic will be selected in the y2 direction, and the yellow component will become lighter. That is, in this operation, the density of only the monochromatic component is changed, and the color tone is changed. The same applies to M, C, and Bk.

20(a) 180 and 181 are respectively in the main scanning direction, for example, 16 pel/mm,
A 4 lengthwise 297mm = 16X297=47
It is a FiFo memory with a capacity for 52 pixels, and the second
As shown in Figure 0 (b), A W E , B W E = ”
Write operation to memory during “L o”, ARE, BR
E = "Lo" section read operation is performed, ARE =
Since the output of A is in a high impedance state when it is "H4" and the output of B is in a high impedance state when B RE = "Hi", a wired OR is taken for each output, and Dout627
is output as FiFoA, FiFoB180,1
81 has internal WCK and RCK (clock) respectively.
Since the internal pointer advances according to the write address counter and the read address counter (Figure 20 (C)), the WCK
Video data transfer clock VCLK58 in the system
8 is thinned out by rate multiplier-630, and RCKi: VCLK588 is given as CLK without thinning.
It is well known that when the input data is given, the input data to this circuit is reduced at the time of output, and when the opposite is given, it is enlarged.
The read and write operations of oA and B are performed alternately.

Furthermore, the W address counter 182. in the FiFo memory 180°181. The R address counter 183 continues counting by the clock only during the period in which the enable signals (WE, RE...635°636) are enabled "Lo".
Since the configuration is initialized by R5T (634) = “Lo”, for example, as shown in Fig. 20 (d), R
After 8T (in this configuration, the synchronization signal in the main scanning direction is 5 hours), rW1 = m pixels from the n1th pixel.
Write pixel data with “LO” (same as m), n
ARE = “Lo” for m pixels from the 2nd pixel (old 1
ERIT in the same figure) and read out the pixel data.
Move from E data to READ data. That is, by varying the occurrence position and section of shoulder 1 (and old 1) on day n (and L-) in this way, the results obtained in Fig. 20(e)(f゛)(
As in g), the image can be moved arbitrarily in the main scanning direction, and in combination with the above-mentioned WCK or RCK thinning, it is easy to control the magnification and movement. WE, ARE, and BWE are input to this circuit.

m is generated by the area generation circuit shown in FIG. 17(d) as described above.

After magnification control is performed in the main scanning direction as necessary in FIG. 20, edge enhancement and smoothing processing is performed in FIG. 21. FIG. 21(a) is a block diagram of this circuit, in which memories 185 to 189 each have a main scan direction.
It has a capacity of 547 minutes, and has a FiFo configuration in which a total of 5 lines are sequentially and cyclically stored and simultaneously output in parallel. 190 is a commonly used second-order differential spatial filter, in which edge components are detected and the output 646 is 1
At step 96, a gain having the characteristics shown in FIG. 21(b) is applied. The shaded area in FIG. 21(b) is clamped at O in order to remove small components, ie, noise components, from among the components output by edge enhancement. On the other hand, the buffer memory outputs for 5 lines are input to smoothing circuits 191 to 195, where averaging is performed in units of pixel blocks of 5 different sizes shown in the figure from lxl to 5x5, and each output 6
Among 41 to 645, the desired smoothed signal is selected by selector 1.
97. 5M5L signal 651 is CPU2
It is output from the I10 port of No. 2, and is controlled in association with the designation from the operation panel, as will be described later. Further, 198 is a divider, and for example, when 3x5 smoothing is selected, "15" is set by the CPU 22, and when 3x7 smoothing is selected, "21" is set by the CPU 22 and averaged. .

The gain circuit 196 has a look-up table (LUT) configuration, and is a RAM into which data is written by the CPU 22, similar to the gamma circuit shown in FIG. It is set to be “0”. Furthermore, this edge emphasis control and smoothing control correspond to the liquid crystal touch panel screen on the operation panel, and the screen shown in FIG. 21(d) (second
-7 Figure P430) As the operator operates the sharpness in the direction of 1°2 and 3.4, the conversion characteristics of the gain circuit change as shown in Figure 21 (C).
It can be rewritten by On the other hand, when the operator operates 1', 2', 3', and 4' in the direction of weak <sharpness>, the switching signal 5 of the selector 197 is activated.
With M5L652, the smoothing block size is 3X3. They are selected to be as large as 3X5, 3X7, and 5X5. At the center point C, lxl is selected, the gain circuit EAREA651 becomes ``LO'', the input Din is neither smoothed nor edge emphasized, and the adder 1
It is output as Dout to the output of 99. In this configuration, for example, the moiré that occurs in halftone originals can be improved by smoothing, and the sharpness of characters and line drawings can be improved by edge enhancement. In order to improve the disadvantages that when smoothing is applied to improve moiré when a dot original and text and line drawings are in the same original, the characters become blurred and when edges are emphasized, moire appears strongly. By controlling EAREA651 and 5M5L652 generated in Fig. 17(d), for example, 3x5 smoothing is selected with 5M5L652, and EAREA651 is set to A as shown in Fig. 21(e).
When generated as shown in ' and B' and applied to the original cross-dot cross, moiré is improved for the dot image, and sharpness is improved for the character area. Signal T
MAREA660 is generated by the area generation circuit 51 like EAREA651, and outputs D when TMAREA=“1”.
out=“A+B”.

When TMAREA="0", Dout="O". Therefore, if a signal such as 660-1 in FIG. 21(f) is generated by controlling the TMAREA 660, the shaded area (inside the rectangle) is extracted and a signal such as 660-2 in FIG. 21(g) is generated. When this is done, the shaded area (outside the rectangle) will be removed (outlined).

FIG. 5 200 is a document coordinate recognition circuit that recognizes the coordinates of the four corners of a document placed on a document table.The coordinates are stored in an internal register (not shown), and after a preliminary scan for document position recognition, the CPU 22 registers the coordinates of the four corners of a document placed on a document table. Read the coordinate data.

Since it is disclosed in detail in Japanese Patent Application Laid-Open No. 59-74774, a detailed explanation will be omitted. However, in the preliminary scan for main document position recognition, after the black correction and white correction shown in FIGS. 10 and 11(a), the masking calculation coefficient shown in FIG. 16(a) is k. , J,, m, for monochrome image data generation, and C6+ CI+ c2 in the same figure is (0,
1゜l), and UAR so as not to perform UCR (undercolor removal)
By setting EA565="Lo", the data is input to the document position recognition unit 200 as monochrome image data.

FIG. 22 shows an operation panel section, particularly a liquid crystal screen control section, and a key matrix according to the present invention. This operation panel is controlled by commands given from the CPU bus 508 in FIG. 5 to the I10 port 206 which controls the liquid crystal controller 201 in FIG. 22 and the key matrix 209 for manual key and touch key operations. The fonts displayed on the LCD screen are stored in the FONT ROM205, and the CPU
RAM2 is refreshed from time to time by the program from 22.
Transferred to 04. The liquid crystal controller sends screen data for display to the liquid crystal display 20 via the liquid crystal driver 202.
3 and display the desired screen. On the other hand, all key inputs are controlled by the I10 port 206, and the pressed key is detected by a commonly performed key scan, and the key is sent from the I10 port to the CPU 22 through the receiver 208.
is input.

FIG. 23 shows the configuration when a film projector 211 is mounted and connected to this system (FIG. 1).

The same numbers as in FIG. 1 indicate the same components, and a mirror unit consisting of a reflection mirror 218, a Fresnel lens 212, and a diffusion plate 213 is placed on the document table 4, and the film 216 projected by the film projector 211 is The transmitted light image is scanned in the direction of the arrow by the above-mentioned document scanning unit and read in the same manner as the original document. film 21
6 is fixed with a film holder 215, and the lamp 212 is connected to 0N10F from the lamp controller 212.
PJON from the I10 port of the CPU 22 (Fig. 2) in the controller 13 to control F and lighting voltage.
655. PJCNT657 is output. The lamp controller 212 determines the lamp lighting voltage as shown in FIG. 24 by the value of the 8-bit input PJCNT 657, and is normally controlled between Vmin and Vmax.At this time, the input digital data is DA-DB. .Figure 25 (
Fig. 25(b) shows an outline of the operation flow for reading an image from a film projector and copying it, and a timing chart is shown in Fig. 25(b). At SL, the operator sets the film 216 on the film projector 211, determines the lamp lighting voltage Vexp through shave correction (S2) and AE (S3), and starts the printer 2 according to the operating procedure from the operation panel described later. (S4). Prior to the ITOP (image leading edge synchronization signal) signal from the printer, PJCNT=Dexp (corresponding to the appropriate exposure voltage), and a stable light amount is obtained during image formation. ITOP
Seven images are formed according to the signal, and DA(
(corresponding to the minimum exposure voltage), the lamp is kept dimly lit to prevent deterioration of the filament due to rush current when the lamp is turned on, extending its lifespan. Thereafter, in the same manner, after M image formation, C image formation, and black image formation (37 to 512), PJCNT
="00" and the lamp is turned off.

Next, the processing procedure of AE and shading correction in the projector mode will be shown according to FIGS. 29(a) and 29(b). When the operator selects a projector mode using the operation panel, the operator first selects whether the film to be used is a color negative film, a color positive film, a black-and-white negative film, or a black-and-white positive film. If it is a color negative, set the film carrier 1 fitted with the cyan color correction filter in the projector, and remove the unexposed part (film base) of the film to be used.
is set in the film holder, and then the film AS
When the user selects whether the A sensitivity is 100 or more and less than 400 or 400 or more and presses the shading start button, the projector lamp lights up at the reference lighting voltage V. Here, the cyan filter cuts out the orange base portion of the color negative film and adjusts the color balance of the color sensor equipped with the R, G, and B filters.

Furthermore, by extracting shading data from unexposed areas, a wide dynamic range can be obtained even in the case of negative film. If the film is other than color negative film, select N.
D filter fitted (or no filter)
When the film carrier 2 is set and the shading start key on the liquid crystal touch panel is pressed, the projector lamp lights up at the reference lighting voltage v2. In fact, when the operator selects negative film or positive film, the switching of the reference lighting voltages V, V2 may be performed automatically by recognizing the type of film carrier. Next, the scanner unit moves to the vicinity of the center of the image projection section, and calculates the average value of the CCDI line or multiple lines for R, G.
, B as shading data for each
1 (a) into the RAM 78', and the projector lamp is turned off.

Next, set the image film 216 to be actually copied in the film holder 215, and if focus adjustment is necessary, turn on the projector lamp with the lamp lighting button on the operation panel, and after visually adjusting the focus,
Turn off the lamp by pressing the lamp on button again.

When the copy button is turned on, the projector lamp is automatically turned on at vl or v2 depending on the selection result of color negative or not, and the image projection unit's bliscan (
AE) is performed. Blisscanning is used to determine the exposure level of the film to be copied at the time of photographing, and is performed by the following procedure.

That is, the R signals of a plurality of predetermined lines in the image projection area are inputted to the CCD, and the R signals versus frequency of appearance are accumulated to create a histogram as shown in FIG. creation mode”). From this histogram, find the max value shown in the figure, m a x
The maximum and minimum R signal values Rmax and Rmin at which the histogram crosses the level of 1/16 of the value are determined. Then, the lamp light amount multiple α is calculated according to the film type initially selected by the operator. The value of α is a = 255 / Rmax for color or black and white positive film,
For black and white negatives a = CH/Rmin.

For color negatives with ASA sensitivity less than 400, α=C2/R
min, for color negatives with ASA sensitivity 400 or higher a
It is calculated as =C3/Rmin. CI+ 02+
03 is a value predetermined by the gamma characteristics of the film, and is a value of about 40 to 50 out of 255 levels. The α value will be converted into output data to the variable voltage power supply of the projector lamp using a predetermined look-up table. Next, the projector lamp is turned on with the lamp lighting voltage V obtained in this way, and the logarithmic conversion table shown in FIG. 3 (
a) and the masking coefficient in FIG. 16(a) are set to appropriate values and a normal copying operation is performed. As shown in Fig. 3(a), the logarithmic conversion table is selected from eight tables 1 to 8 using a 3-bit switching signal. 4 for black and white positives, 4 for color negatives (ASA less than 400), 5 for color negatives (ASA 400 or more), 6 for black and white negatives, and so on. Also, the contents are R,G.

It is assumed that each of B can be set independently. FIG. 13(b) shows an example of the table contents.

The copying operation is thus completed. When transferring to the next film copy, film layer properties (negative/positive).

The operator determines whether or not the color/black and white etc.) changes, and if it does, return to the step in Figure 29(a), and if it does not, return to ■ and repeat the same operation. Become.

As described above, print output corresponding to negative, positive, color, and black and white films can be obtained by the film projector 211, but in this system, as can be seen in Fig. 23, the film image is enlarged and projected onto the document table. There are few fine character and line drawings, and the purpose of the film requires particularly smooth gradation reproduction. Therefore, in this system, the following gradation processing on the color LBP output side is different from that when printing from a reflective original. This is done in a PWM circuit (778) contained within printer controller 700.

Details of the PWM circuit 778 will be explained below.

Figure 26 (A) is a block diagram of the PWM circuit, Figure 26 (
B) shows the timing diagram.

The input VIDEODATA 800 is a latch circuit 90
0, it is latched at the rising edge of VCLK801 and synchronized with the clock. ((B) Figure 800゜801
Reference) VIDEODATA815 output from the latch
A LUT (look-up table) 901 composed of ROM or RAM performs gradation correction, and a D/A (digital-to-analog) converter 902 performs D/A conversion to generate one analog video signal. The generated analog signals are input to comparators 910 and 911 at the next stage and compared with triangular waves, which will be described later. The signals 808 and 809 input to the other side of the comparator are each synchronized with VCLK and are individually generated triangular waves ((B)
09). That is, the triangular wave WVI generated by the triangular wave generation circuit 908 is generated in accordance with the reference signal 806 for triangular wave generation, which is obtained by dividing the frequency of the synchronized clock 2VCLK803, which has twice the frequency of VCLK801, by a flip-flop 906 into, for example, J-. In the other case, 2VCLK is divided by 6 circuit 9
Signal 807 created by dividing the frequency by 6 with 05 ((B) Figure 807
This is the triangular wave WV2 generated by the triangular wave generating circuit 909 according to the following. Each triangular wave and VIDEODATA are all generated in synchronization with VCLK, as shown in FIG. Furthermore, each signal must be synchronized with H3YNC802, which is generated in synchronization with VCLK (inverted HSYN
C initializes circuits 905 and 906 at HSYNC timing. By the above operation, CMPI 910. C
MP2 911 output 810.8111: is the input (7
) Depending on the value of VIDEODATA800, the mouth opening (C
) is obtained during the pulse. That is, in this system, when the output of the AND gate 913 in Figure (A) is "B", the laser lights up, prints a dot on the print paper, and prints "O".
”, the laser turns off and nothing is printed on the paper.

Therefore, turning off the light can be controlled by the control signal LON (805). (C) of the same figure shows the situation when the level of the image signal changes from "black" to "white" from left to right. PWM
Since the inputs to the circuit are "FF" for "white" and "00" for "black," the output of the D/A converter 902 changes as shown by Di in FIG. On the other hand, the triangular wave (
WVI in a) and WV2 in (b), so the outputs of CMPI and CNP2 are PWI and WV2, respectively.
As it goes from "black" to "white" like PW2, the pulse becomes narrower (.Also, as is clear from the figure, PWI
When you select , the dots on the print paper are P1 → P2 → P
It is formed at intervals of 3→P4, and the amount of change during the pulse has a dynamic range of Wl. On the other hand, when PW2 is selected, dots are formed at intervals of P5→P6, and the dynamic range during the pulse becomes W2, which is three times larger than PW1. By the way, for example, the printing density (resolution) is PWI
When , about 400 lines/inch, P W 2
When , it is set to approximately 133 lines/1 nch, etc. Also, as is clear from this, if PWI is selected, the resolution is PW2.
On the other hand, when PW2 is selected, the dynamic range of the pulse width is about three times wider than that of PWI, so the gradation is significantly improved. Therefore, for example, if high resolution is required, PWI should be selected, and if high gradation is required, PW2 should be selected (5CR3E from an external circuit).
L804 is given. That is, 912 in Figure (A) is a selector, and when 5CR3EL804 is 0', the A input is selected, that is, when PWl is "1", PW2 is output from the output terminal σ, and the laser is activated only during the final pulse. lights up and prints a dot.

LUT901 is a table conversion ROM for gradation correction, but the address is 812.813 and 1. A table switching signal of 2.814 and a video signal of 815 are input, and a corrected VI[EODATA is obtained from the output. For example, if 5CR8EL804 is set to "0" to select PWI, the output of ternary counter 903 will be all 0" and 90
A correction table for PWI among 1 is selected. Also K
. , , , and 2 are switched according to the output color signal, for example, KOr KItK2="o, o, o"
Yellow output when ``0.1゜0'', magenta output when ``1. O, O'', cyan output when ``1. 1.
When set to "O", black output is performed. In other words, the gradation correction characteristics are changed for each color image to be printed. By this,
This compensates for differences in gradation characteristics due to differences in image reproduction characteristics depending on the color of the laser beam printer. Also 2 and K. +
By combining K and I, it is possible to perform gradation correction over a wider range. For example, it is also possible to switch the gradation conversion characteristics of each color depending on the type of input image. Next, P.W.
2 should be selected (, When 5CR3EL is set to "1", the ternary counter 603 counts the line synchronization signal and
1" → "2" → "3" → '1" → "2" → "3" →...
* is output to address 814 of the LUT. This results in
By switching the gradation correction table for each line, we aim to further improve gradation.

This will be explained in detail according to FIG. 27 and subsequent figures. Curve A in FIG. 5A is a characteristic curve of input data versus print density when, for example, PWI is selected and the input data is set to "FF", that is, "white". As a standard, it is desirable that the characteristic be K, and therefore B, which is the opposite characteristic of A, is set in the gradation correction table. Same figure (B)
are the gradation correction characteristics A, B, and C for each line when PW2 is selected, and the pulse width in the main scanning direction (laser scanning direction) is varied with the aforementioned triangular wave, and at the same time, the pulse width in the sub-scanning direction (image feeding direction) is varied. ) has three levels of gradation as shown in the figure to further improve the gradation characteristics. In other words, in the part where the concentration change is steep, characteristic A becomes dominant, resulting in steep reproducibility.
A gentle gradation is reproduced by characteristic C, and B reproduces an effective gradation for the intermediate portion. Therefore, as above, PWI
Even if you select , a certain level of gradation is guaranteed at high resolution
When PW2 is selected, extremely excellent gradation is guaranteed. Furthermore, regarding the above-mentioned pulse width, for example, in the case of PW2, ideally the pulse width W is O≦W≦W2, but
Due to the electrophotographic characteristics of the laser beam blitter and the response characteristics of the laser drive circuit, there is a region where dots are not printed (no response) with a pulse width shorter than a certain width (Fig. 280).
≦W≦wp, the region where the concentration is saturated Fig. 28 wq
≦W≦W2. Therefore, the pulse width and concentration are set so that the pulse width changes within a linear effective range wp≦W≦wq. That is, when the input data changes from O (black) to FFH (white) as shown in Figure 28 (B),
The pulse width varies from wp to wq, further ensuring linearity between input data and concentration.

The video signal converted into a pulse width as described above is applied to the laser driver 711L via the line 224 to modulate the laser beam LB.

Note that the signal K in FIG. 26(A). + KI+ K2
+5CR3EL, LON are output from a control circuit (not shown) in the printer controller 700 in FIG. 2, and are output based on the serial communication with the league unit l (described above). Especially when a reflective original is used, 5CR3EL="0" and a film projector is used. The time is controlled to 5CR3EL=“l”, and smoother gradations are reproduced.

[Image forming operation]

Now, the laser beam LB modulated according to the image data
The 30th polygon mirror 712 rotates at high speed.
The image is scanned horizontally at high speed in the width indicated by arrows AB in the figure, passes through the f/θ lens 13 and the mirror 714, and forms an image on the surface of the photosensitive drum 715, thereby performing dot exposure corresponding to the image data.

One horizontal scan of the laser beam corresponds to one horizontal scan of the original image, and in this example, the feeding direction (sub-scanning direction) is 1/16 mm.
It corresponds to the width of

On the other hand, since the photosensitive drum 715 is rotating at a constant speed in the direction of the arrow in the figure, the above-described laser beam is scanned in the main scanning direction of the drum, and the scanning of the photosensitive drum 715 is performed in the sub-scanning direction of the drum. Since the rotation is performed at a constant speed, planar images are successively exposed and a latent image is formed. From uniform charging by the charger 717 prior to this exposure → above-mentioned exposure →
A toner image is formed by toner development by the developing sleeve 731. For example, in response to the first document exposure scan in the color reader, the developing sleeve 731
If it is developed with Y yellow toner, the photosensitive drum 71
A toner image corresponding to the yellow component of the original 3 is formed on the original 5 .

Next, a yellow toner image is transferred onto a sheet of paper 754 whose leading end is carried by a gripper 751 and wrapped around a transfer drum 716 by a transfer charger 729 provided at the contact point between the photosensitive drum 715 and the transfer drum 716. ,Form. The same processing process is performed for M (magenta), C (
Repeat for cyan) and BK (black) images.
By superimposing each toner image on the paper sheet 754,
A full color image is formed using four color toners.

Thereafter, the transfer paper 791 is removed by the movable peeling claw 75 shown in FIG.
0, it is peeled off from the transfer drum 716 and transferred to the conveyor belt 7.
42 to an image fixing section 743, and the toner image on the transfer paper 791 is melted and fixed to the fixing section 743 by heat pressure rollers 744, 745.

<Description of the operation section> Fig. 41 is an explanatory diagram of the operation section of this color copying machine, where the key 401 is a reset key to return to the standard mode, and the key 40 is a reset key for returning to the standard mode.
2 is an enter key for setting the registration mode which will be described later, key 404 is a numeric keypad for inputting numerical values such as the set number of copies, and key 403 is a clear/stop key for clearing the set number or stopping during continuous copying. , 405 displays settings for each mode and the status of the printer 2 using touch panel keys. Key 407 is a center movement key that specifies center movement in the movement mode, which will be described later. Key 408 is a document recognition key that automatically detects the document size and document position during copying. Key 406 is a key that specifies projector mode, which will be described later. The key 409 is a recall key for restoring the previous copy setting state, and the key 410 is a memory key (Ml, M2.M) for storing or recalling the setting values of each mode programmed in advance.
3°M4), the key 411 is a registration key for each memory.

Digitizer> FIG. 32 is an external view of the digitizer 16. key 42
2. 423, 424, 425, 426, and 427 are entry keys for setting each mode described later, and the coordinate detection plate 420 is for specifying an arbitrary area on the document or for setting the magnification. This is a position detection board, and the point pen 421 is used to specify its coordinates. These keys and coordinate input information are sent to the CP via bus 505.
Data is exchanged with U22, and this information is stored in RAM24 and RAM25 accordingly.

Description of standard screen> FIG. 33 is an explanatory diagram of the standard screen. Standard screen poo.

is a screen that is displayed when copying or not setting, and allows settings for scaling, paper selection, and density adjustment. At the lower left of the screen, it is possible to specify so-called fixed scaling. For example, when touch key a (reduction) is pressed, the change in size and magnification are displayed as shown on screen Po1o. Also, when touch key b (enlarge) is pressed, the size and magnification are displayed in the same way, and with this color copying machine, three levels of reduction and three levels of enlargement can be selected. If you want to return to the original size, press the touch key h (equal size) and the magnification will be 100%. Next, by pressing touch key C in the center of the display, the upper cassette and lower cassette can be selected.

In addition, when you press the touch key d, the APS automatically selects the cassette containing the paper that best matches the original size.
AutoPaper Select) mode can be set. Touch keys e and f on the right side of the display are keys for adjusting the density of the printed image, and can be set even during copying. Furthermore, regarding the touch keys g, explanations of each touch key and how to make copies are provided for operating the color copying apparatus. This is an explanation screen, and the operator can easily operate it by looking at this screen. In addition to the explanation on the standard screen, explanation screens for each mode are also provided for each setting mode, which will be described later. The black stripe display at the top of the screen displays the current status of each mode, allowing you to check for any operational errors or to check settings. Also, in the message display section at the bottom, the screen P
Messages regarding the status of the color copying machine such as O20, operational errors, etc. are displayed. In addition, JAM and toner replenishment messages are displayed in the printer part 16 on the entire screen, making it easy to determine where the paper is located.

<Zoom variable magnification mode> Zoom variable magnification mode M100 is a mode that prints by changing the size of the original.Manual zoom magnification mode MI
It consists of IO and auto zoom variable magnification mode M120. Manual zoom variable magnification mode MIIO can be used in the X direction (
The magnifications in the sub-scanning direction) and the Y direction (main-scanning direction) can be independently set in units of 1% using the editor or the touch panel. Autosm magnification mode M12
0 is a mode that automatically calculates and copies an appropriate magnification ratio according to the original and the selected paper size, and also supports XY independent auto magnification, XY equal ratio auto magnification, X auto magnification, and Y auto magnification. Four types can be specified. In the XY independent automatic magnification change, the magnifications in the X direction and Y direction are automatically set independently so that the document size or the paper size selected for a specified area on the document is achieved. XY equal ratio automatic magnification is
Y independent auto magnification calculation result X at the smaller magnification
Both Y and Y are scaled at the same rate and printed. X auto magnification, Y
Auto magnification is a mode in which magnification is automatically changed only in the X direction and only in the Y direction.

Next, the operating method of the zoom magnification mode will be explained using the liquid crystal panel screen. When the zoom key 422 of the digitizer 16 is pressed, the display changes to screen P100 in FIG. 34. If you want to set manual zoom here, use the point pen 421 to specify the intersection of the magnifications in the X and Y directions written on the coordinate detection plate 420 of the editor 16. At this time, the display changes to screen P110, and the specified X and Y magnification values are displayed. Therefore, if you wish to finely adjust the displayed magnification, for example, if only in the X direction, press the left and right keys (up, down) of touch key b. If you want to make adjustments at the same rate in XY, use the left and right keys of touch key d, and the display will go up and down at the same rate in XY. Next, if you wish to set auto zoom, use the digitizer 16 in the manner described above from screen P100 or press touch key a to advance the display to screen P110. Therefore, the four types of auto zoom, XY
To specify independent auto magnification, XY equal ratio P auto magnification, X auto magnification, and Y auto magnification, touch key b.
By pressing C, touch key d, touch key b, and touch key C, the desired autozoom can be obtained.

<Movement Mode> The movement mode M200 is composed of four types of movement modes, each of which is a center movement M210, a corner movement M220, a designated movement M230, and a binding margin M240. Center movement M210 is a mode in which the original size or a specified area on the original is moved so that it is printed exactly at the center of the selected paper. Corner movement M220 is a mode in which the original size or a specified area on the original is moved to any of the four corners of the selected paper. Here, as shown in FIG. 43, even when the print image is larger than the selected paper size, the print image is controlled to move from the designated corner as the starting point. Specified movement M230 is a mode in which a document or an arbitrary area of the document is moved to an arbitrary position on the selected paper. The binding margin M240 is a mode in which the paper is moved to the left and right in the feeding direction of the selected paper so as to create a margin for so-called binding.

Next, we will explain the actual operating method for this color copying machine in the third section.
This will be explained using FIG. 5(a). First, when the movement key 423 of the digitizer 16 is pressed, the display changes to screen P2O0.

On screen P2O0, the four types of movement modes described above are selected.

If you want to specify center movement, press touch key a on screen P2O0 to finish. For corner movement, when touch key b is pressed, the display changes to screen P230, where one of the four corners is designated. Here, the correspondence between the moving direction of the actual print paper and the specified direction on the screen P230 is as shown in FIG. 35(b). It has the same image as the one above. When a user wishes to perform a specified movement, press the touch key C on screen P2O0 to proceed to screen P210, and use the digitizer 16 to specify the destination position. At this time, the display changes to screen P211, and further fine adjustments can be made using the up/down keys in the figure. Next time you want to move the binding margin, use the screen P2
0 touch key d is pressed, and the length of the margin portion is specified using the up/down keys on the screen P220.

Explanation of area specification mode> In area specification mode M300, it is possible to specify one or more areas on the document, and trimming mode M310. Masking mode M3
20. Any of the three image separation modes can be set. The trimming mode M310 described here is
Only the image inside the designated area is copied, and the masking mode M320 is for copying while masking the inside of the designated area with a white image. The image separation mode M330 further includes a color mode M331. Color conversion mode M332. Paint mode M333. Any color balance mode M334 can be selected. In color mode M331, the specified area can be printed in 4 full colors or 3 full colors Y, M, C.

Any color mode can be selected from nine types: Bk, RED, GREEN, and BLUE. Color conversion mode M33
2 is a mode in which a predetermined color portion having a certain density range within a specified area is replaced with another arbitrary color and copied.

Paint mode M333 is a mode in which a copy is made that is uniformly filled with another arbitrary color over the entire designated area. The color balance mode M334 is a mode in which the specified area is printed with a different color balance (tone) than the area outside the specified area by adjusting the density of each of Y, M, C, and Bk.

A specific operating method in this embodiment of the area designation mode M300 will be explained in order with reference to FIG.

First, when the area designation key 424 on the digitizer 16 is pressed, the liquid crystal display changes to screen P300, and the document is placed on the digitizer 16 and an area is designated with the point pen 421. When two points in the area are pressed, the display changes to screen P310, and if the specified area is correct, touch key a on screen P310 is pressed. Next, this specified area is displayed on screen P320.
Select one of trimming, masking, or image separation and press the key. If the designation at this time is trimming or masking, the user presses the touch key a on the screen P320 to proceed to the next area designation.

If you select image separation on screen P320, screen P33
Go to 0 and select color conversion, paint, color mode, or color balance. For example, if you want to print an image within a specified area in four colors: Y, M, C, and Bk, press touch key a (color mode) on screen P330, then touch from among the nine color modes on screen P360. Press key a to complete the designation to print the area in four full colors.

On screen P330, touch key b for specifying color conversion
If you press , the display advances to screen P340, where you specify by point a point within the specified area that has the color information you want to convert. If the specified position is OK, screen P341
Press touch key a to proceed to screen P370. Screen P3
70 is a screen for specifying a color after conversion, and one of four types: standard color, specified color, registered color, and white is specified. here,
If you want to select the color after conversion from standard colors, please select screen P370.
Press touch key a to select the yellow and magenta displayed on screen P390.

Specify one of seven colors here: cyan, black, red, green, and blue. In other words, the standard color is color information unique to this color copying apparatus, and in this embodiment, the density of the print image is printed at a ratio as shown in Figure 45, which is just an intermediate density. There is. However, there are of course requests to make the density of the specified color a little more intense or darker, and for that purpose, the user can press the density designation key in the center of the screen P390 to convert the color to the desired density.

Next, when touch key C (specified color) is selected on screen P370, proceed to screen P380, specify the point with the converted color information with the point pen using the same specification method as the color coordinates before conversion, Proceed to screen P381. Again, as mentioned above, only the density is changed without changing the color tone of the specified coordinates,
When it is desired to perform color conversion, it is possible to perform color conversion at the desired density by pressing key a for density adjustment in screen P381.

Next, on screen P370, if the standard color and the desired color are not found on the document, color conversion can be performed using color information registered in color registration mode M710, which will be described later. In this case, touch key C on screen P370 is pressed, and then on screen P391, the user presses the touch key corresponding to the color number that is desired to be used among the registered colors. Here, too, the density of the registered color can be adjusted by changing only the density without changing the ratio of each color component. Further, when touch key C (white) is specified on screen P370, the same effect as in masking mode M310 described above is obtained.

Next, paint mode M333 of image separation mode M330
If you want to specify , touch key C on screen P330 is pressed and the screen advances to P370. The subsequent color specification after painting is performed in exactly the same manner as the setting method from screen P370 onward in color conversion mode M332.

On screen P330, if you want to print only within the specified area with the desired color balance (tone), press touch key d (
color balance). At this time, the display changes to screen P350, where the density adjustment of yellow, magenta, cyan, and black, which are toner components of the printer, is performed using up and down touch keys. Here, on the screen P2S5, a black bar graph indicates the state of density specification, and a scale is displayed next to it for easy viewing.

<Description of color create mode> In color create mode M400 in FIG. 41, color mode M410. Color conversion mode 420. Paint mode M430. Sharpness mode M440. One or more of the five color balance modes M450 can be specified.

Here, in the area specification mode M300, the color mode M
331. Color conversion mode M332. Paint mode M33
3. The difference from the color balance mode M334 is that the color create mode M400 operates not on a certain area of the document, but on the entire document; the other functions are similar to the entire document. Therefore, the explanation of the above four modes will be omitted.

The sharpness mode 440 is a mode for adjusting the sharpness of an image, and is a mode for adjusting the ratio at which so-called etch is emphasized in a character image or a smoothing effect is produced in a halftone image. Next, a method of setting the color create mode will be explained with reference to the explanatory diagram of FIG. 37. When the color create mode key 425 of the digitizer 16 is pressed, the liquid crystal display changes to the screen P400. When touch key b (color mode) is pressed on screen P400, the screen advances to screen P410, where the color mode to be copied is selected. When the desired color mode is a monochrome color mode other than 3-color or 4-color, the display further advances to screen P411, where a negative or positive selection can be made. Touch key C (sharpness) on screen P400
When you press , the screen changes to P430 where you can adjust the sharpness of the copied image. Screen P43
When the strong touch key i of 0 is pressed, the amount of etch emphasis increases as described above, and in particular, thin lines such as character images are copied clearly. Further, when the weak touch key h is pressed, peripheral pixels are smoothed, and the so-called smoothing amount is increased, and settings can be made so that moiré, etc. in halftone originals can be erased.

Also, color conversion mode M420. The operations in paint mode M430° and color balance M450 are the same as those in area designation mode, so they will be omitted here.

Explanation of inset compositing mode〉 Inset compositing mode M6 converts the specified color image area into the specified area of the monochrome image area (color image area is also acceptable) for originals such as E and F in Figure 42. In this mode, the image is moved and printed at the same size or at variable magnification.

We will explain how to set the inset compositing mode using pictures on the LCD panel and touch panel key operations. First, when a document is placed on the coordinate detection plate of the digitizer 16 and the inset synthesis key 427, which is the entry key for the inset synthesis mode, is pressed, the liquid crystal screen changes from the standard screen P000 in FIG. 33 to the screen P600 in FIG. 39. Next, use the point pen 421 to move the color image area that you want to move.
Specify a point. At that time, two dots having a similar shape to the actually designated position are displayed on the liquid crystal screen as shown in screen P610.

If you want to change the area specified at this time to another area, press touch key a on screen P610 and specify two points again.

If you are satisfied with the set area, press touch key b, then specify two points on the diagonal line of the monochrome image area to move to with the point pen 421, and if satisfied, press touch key C on screen P630.
Press. At this time, the liquid crystal screen changes to screen P640, where the magnification of the moving color image is specified. If you want to fit the moving image at the same size, press touch key d,
Press the End touch key to complete the setting. At this time, Figure 2
- When the moving image area is larger than the moving destination area, as in A and B of 12, the image is fitted according to the moving destination area,
When small, the area is automatically controlled to be printed as a white image.

Next, when the specified color image area is to be scaled and fitted, the touch key e on the screen P640 is pressed.

At this time, the screen changes to screen P650, and the magnification in the X direction (sub-scanning direction) and the Y-direction (main scanning direction) is set in the same manner as the operating method in the zoom magnification mode described above. First, when it is desired to fit the designated moving color image area with automatic scaling at the same XY ratio, the touch key g on the screen P650 is pressed to reverse the key display. Also, if you want to print the moved color image area in the same size as the destination area, select screen P6.
50 touch keys h and i to reverse. Also, when setting manual magnification only in the X direction, only in the Y direction, or at the same ratio in X and Y, you can press the up and down touch keys respectively.

When the above setting operations are completed, press touch key j,
The screen returns to the standard screen P000 in FIG. 33, and the setting operation for the inset synthesis mode is completed.

Enlarged continuous copying mode> In enlarged continuous copying mode M500, when copying the original size or specified area of the original at the set magnification,
When the selected paper size is exceeded, the document is automatically divided into two or more areas according to the set magnification and specified paper size, and each part of the divided document is copied onto multiple sheets of paper. This is the output mode. Therefore, by pasting these multiple copies together, it is possible to easily make a copy larger than the specified paper size.

In the actual setting operation, first press the enlarged continuous shooting key 426 on the digitizer 16, and then press the touch key a on the screen P500 in FIG. 38 to complete the setting. All you have to do is select the desired magnification and paper.

Color registration mode> Registration mode M700 is color registration mode M710. Zoom program mode M720. Manual feed size specification mode M
The color registration mode M710, which is composed of three types of modes of 730, is the color registration mode M40 that is
0 and area specification mode M300 when specifying the color conversion mode and paint mode, the converted color can be registered in this mode. The zoom program mode M720 is a mode in which the magnification is automatically calculated by inputting the size of the original and the length of the copy paper size, the resulting magnification is displayed on the standard screen P000, and subsequent copies are made at that magnification. It is. In the manual feed size specification mode M730, this color copying machine allows copying by manual feed in addition to feeding paper from the upper and lower cassettes, and when you want to use it in the so-called APS (Auto Paper Select) mode, you can specify the size of the manual feed. This mode allows you to

First, when the * key 402 on the operation panel in FIG. 31 is pressed, the display changes to screen P700 in FIG. 40. Next, when you want to register a color in color registration mode M710, select screen P700.
Press touch key a and select digitizer 1 on screen P710.
6 to register a color or place a document thereon, and specify the color portion using the point pen 421.

At this time, the screen changes to screen P711, and the touch key corresponding to the registration number desired to be set is pressed. Furthermore, if you wish to register other colors, press touch key d on screen P711 to return to screen P710, and set using the same procedure. When inputting the coordinates to be registered is completed, touch key e is pressed, and touch key 1, which is the start key for reading screen P712, is pressed.

After the touch key r is pressed, the operation is performed according to the process of the flowchart in FIG. 44. First, use a 5700 halogen lamp.
0 is turned on, the number of movement pulses of the stepping motor is calculated from the above specified coordinates (sub-scanning direction) in 5701, and the document scanning unit 11 is moved by issuing the above specified movement command. At step 5702, l lines of the sub-scanning position specified by the coordinates in the line data import mode are loaded into the RAM 78' of FIG. 11(a). 570
In 3, from this captured l-line data, the average value of 8 pixels before and after the main scanning position whose coordinates have been specified is stored in the RAM 78'.
The CPU 22 calculates the result and stores it in the RAM 24.

At step 5704, it is determined whether the specified number of registered coordinates have been read, and if there are still more, processing for line spacing is performed at step 5701. When all the reading positions have been completed, the halogen lamp 10 is turned off in step 5705, and the document scanning unit is moved to the reference position H.
, the operation is completed by returning to the P position.

Next, when touch key a (zoom program) is pressed on screen P700, the screen changes to screen P720, where the length of the document size and the length of the copy size are set using the up and down keys. The set percentage value is displayed. The calculation result is displayed at the magnification display position on the standard screen P000, and the magnification is set at the time of copying.

Next, on screen P700, when touch key C (manual feed size specification) is pressed, the screen advances to screen P730, where the paper size of the manual feed paper is specified. This mode allows, for example, the APS mode and automatic zoom magnification to be performed on manually fed paper.

In each of the above modes, numerical values and information set by coordinate input on the touch panel or digitizer are stored in the RAM 24 under the control of the CPU 22. They are each stored in a pre-arranged area of the RAM 25, and called and controlled as a parameter during a subsequent copy sequence.

Figure 51 shows a film projector (Figure 24 211)
The following shows the operation procedure for the control panel when the following is installed. After the film projector 211 is connected, when the projector mode selection key (406 in FIG. 31) is turned on, the display on the liquid crystal touch panel changes to P2O3. On this screen, select whether the film is negative or positive. For example, if you select negative film here, the screen changes to P810, that is, the screen for selecting the ASA sensitivity of the film.

Here, for example, film sensitivity ASA100 is selected.

Among these, as detailed in the procedure described in FIG.
5 and turn on the copy button (400 in Fig. 31) to perform the AE operation to determine the exposure voltage.
As shown in FIG. 25(a), image formation is repeated in the order of yellow, magenta, cyan, and Bk (black).

FIG. 46 is a flowchart of sequence control of the present color copying apparatus. This will be explained below according to the flowchart. When the copy key is pressed, the halogen lamp is turned on at 5100, and the black correction mode, which is the operation described above, is performed at 5IOI, and the shooting process of the white correction mode is performed at 5102. Next, if specified color conversion is set in color conversion mode or paint mode, perform color registration and specified color reading processing in 5104, and transfer the color-separated density data of the specified coordinates to registration mode and specified color detection. They are stored in respective predetermined areas accordingly. This operation is as shown in FIG.

5105 determines whether the document recognition mode is set, and if it is set, the scanning unit 16 of 5106-1 scans the maximum document detection length of 435 mm, and the document recognition 200 reads the document via the CPU bus. Detect the position and size of. Also, if it is not set, 51
The paper size selected in step 06-2 is recognized as the document size, and this information is stored in the RAM 24.

In step 5107, it is determined whether or not a movement mode is set, and if it is set, the document scanning unit 16 is moved in advance toward the document side by the amount of movement.

Next, in step 5109, a bit map for outputting the gate signal of each function generated from RAMA 136 or RAMB 137 is created based on the information set by each mode.

Figure 49 shows R of information set by each mode mentioned above.
AM24. 3 is a RAM map diagram set in the RAM 25. FIG. AREA MODE stores identification information for each mode of operation in each designated area, such as painting, trimming, etc. AREAXY contains the document size and size information for each area, and AREA ALPT
is the information after color conversion.

Information as to whether the standard color or the designated color is a registered color is stored. A
REA ALPT XY is AREA ALPT
This is an information area for color coordinates when the content of is the specified color, and A
REA DENS is a density adjustment data area after conversion. AREA PT XY is the information area for color coordinates before conversion in color conversion mode,
The color mode information of the document or the specified area is stored.

Further, in REGI C0LOR, each color information registered in the color registration mode is stored and used as a registered color, and this area is stored in the backup memory of the RA I'vl 25 and is memorized even when the power is turned off.

Based on the information set above, the bitmap shown in FIG. 50 is created. First, from AREA

Next, BITMAP of the start point and end point in the main scanning direction of each area
Set "1" at the position and repeat the same process up to the coordinates of the end point of sub-scanning. The bit position where “1” is set at this time is RAMAl3
6 or each gate signal generated from RAMB 137, and the bit position is determined depending on the mode within the area. For example, area 1, which is the original area, is TMAREA660.
Corresponding to the color balance specification area 5, GAREA
626 is supported. Thereafter, a bitmap for the area is created in the BIT MAP area shown in FIG. 50 in the same manner. Next, 5IO9-1 performs the following processing on the mode in each area. First, area 2 is in a cyan monochrome color mode, and is a monochrome image compared to the four colors of the original. Even if a video is sent out during cyan development in area 2, an image of only cyan components will be printed in area 2, and images of other yellow and magenta components will not be printed. Therefore, when the specified area is selected in monochrome color mode, the MAREA564
Sets the next coefficient in the register selected when becomes active.

αYl, αY2. αY3 0. 0.
0βM:, 8M2. 3M3 0. 0.
0γC1, γC1, γC3Vs, 'A, % to 2.
i! 2. m2 0. 0. 0th order, MA
The data stored in the RAM 23 in FIG. 2 (used in 4-color or 3-color mode) is set in the masking coefficient register selected when REA 564 is "0". Next, for area 2 which is in paint mode,
The first selected by the respective gate signals CHAREAO11, 2, and 3 corresponding to the bits of the IIMAP area.
8. Set data in each register shown in FIG. 8(a). First, to convert all input videos, set FF to yu 159, 00 to yl 160. FF to mu161, m
OO to 1162, FF to Cu 163, O to C1164
0, and input the converted color information stored in Figure 49 to AREA ALPT or REGI C0LOR.
AREA DEN for each color data.
Multiply by the coefficient of the density adjustment data of S, respectively, V' 16
6. Set the converted density data in m' 167 and C' 168. For color conversion of area 4, the above-mentioned yu159. ..., the 49th register is in the C1164 register.
A certain offset value is added to each density data before conversion in the figure, and then the data after conversion is set in the same way. In the color balance of area 5,
Y, M, and C of the RAM 177 are selected by the gate signal GAREA 626 being "1".

In the Bk area, set the data value described above from the color balance value AREA BLAN when specifying the area in Figure 49, and in the area selected by GAREA626 "0", set the color balance BLAN when creating the color.
Set data from CE.

5109 sends a startup command to the printer as SROOM
516. This is shown in the timing chart of FIG. 47 at Sl 10. Detected ITOP, 5ill, Y.

The M, C, and Bk output video signals Co, CI, and C2 are switched, and the halogen lamp is turned on at 5112. 5113 determines the end of each video scan, and if it is finished, 5II
4 turns off the halogen lamp, checks 5114 and 5115 for completion of copying, and if it is completed, 5116
Outputs a stop command to the printer and finishes copying.

Figure 48 shows the signal output from the timer 28) (INT
517 is a flowchart of interrupt processing;
At 0-1, it is checked whether the stepping motor start timer has completed, and if it has been completed, the stepping motor is started, and at 5200, as shown in FIG.
One line of BIT MAP data indicated by X ADD is
Set in AM136 or RAM137. In S201, the address of data to be set in the next interrupt is incremented by 1. 5202 has RAM136. Outputs the switching signals C3595, C4596, and C5593 of the RAM 137, and
3, the time until the next sub-scanning switch is set in the timer 28, and the contents of the BIT MAM, hereinafter referred to as X ADD, are sequentially set in the RAM 136 or RAM 137, and the gate signal is switched.

That is, each time the carriage moves in the sub-scanning direction and an interrupt occurs, the processing contents in the X direction are switched, and color processing such as various color conversions can be performed for each region.

As described above, the color copying apparatus of this embodiment enables various color modes and allows free color reproduction.

In this embodiment, a color image forming apparatus using electrophotography has been described as an example, but it is also possible to apply various recording methods such as inkjet recording, thermal transfer recording, etc. without being limited to electrophotography. Further, although an example has been described in which the reading section and the image forming section are arranged close to each other as a copying apparatus, the present invention can of course be applied to a type in which they are separated and image information is transmitted through a communication line.

<Effect> Since all the reading sensors are driven by synchronized transfer clocks as described above, it is possible to prevent mutual interference of each output.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the digital color copying machine of this embodiment, FIG. 2 is a control block diagram of the reader part controller, and FIG.
The figure shows the protocol between the motor driver 15 and the CPU 22 in Figure 2, Figure 4(a) is a timing diagram of control signals between the reader part and the printer part, and Figure 4(b) shows the reader part and the printer part. Video signal transmission circuit diagram between sections, Figure 4 (c
) is a timing diagram of each signal of the signal line SROOM, Figure 5 is a detailed circuit diagram of the video processing unit in Figure 2, and Figure 6 (
a) is a layout diagram of the color CCD sensor, FIG. 6(b) is a signal timing diagram of each part in FIG. 6(a), and FIG. 7(a) is a diagram of the COD drive signal generation circuit (in the system control pulse generator 57 7(b) is a signal timing diagram of each part of FIG. 7(a), FIG. 8(a) is a detailed diagram of the analog color signal processing circuit 44 of FIG. 5, FIG. (b) is a signal timing diagram of each part in FIG. 8(a),
Figure 8(C) is an input/output conversion characteristic diagram, Figure 9(a),
(b). (C) and (d) are explanatory diagrams for obtaining each line signal from the staggered sensor, Figure 1O (a) is an uncorrected circuit diagram,
Figure 0 (b) is an explanatory diagram of no correction, Figure 11 (a) is a white level correction circuit diagram, Figures 11 (b), (c), (d
) is an explanatory diagram of white level correction, Fig. 12 is an explanatory diagram of line data capture mode, Fig. 13 (a) is a logarithmic conversion circuit diagram, Fig. 13 (b) is a logarithmic conversion characteristic diagram, and Fig. 14 is a reading diagram. The spectral characteristic diagram of the sensor, Fig. 15 is the spectral characteristic diagram of the developed color toner, and Fig. 16 (a) shows the masking, inking, and UC.
R circuit diagram, FIG. 16(b) shows selection signals C8, C, ,C2
Figures 17(a) and 17(b) showing the relationship between color signals and color signals.
, (c), (d), (e), (f). (g) is an explanatory diagram of area signal generation, FIG. 18(a)',
(b). (C), (d), and (e) are explanatory diagrams of color conversion, and FIG. 19 (a). (b), (c), (d), (e), and (f) are explanatory diagrams of gamma conversion for color balance and color shading control;
). (b), (c), (d), (e),' (
f), (g) are explanatory diagrams of variable magnification control, and Fig. 21 (a)
, (b), (c), (d). (e), (f), and (g) are explanatory diagrams of edge enhancement and smoothing processing, FIG. 22 is a control circuit diagram of the operation panel section, and FIG. 23 is a configuration diagram of the film projector.
Fig. 24 is a diagram showing the relationship between control input and lighting voltage of the film exposure lamp, Fig. 25 (a), (b), (C
) is an explanatory diagram when using a film projector, and Figure 26 (
A). (B) and (C) are explanatory diagrams of the PWM circuit and its operation, Figures 27 (A) and (B) are gradation correction characteristic diagrams, and Figures 28 (A) and (B) are triangular waves and laser lighting time. 29(a) and 29(b) are control flowcharts when using a film projector, FIG. 30 is a perspective view of the laser printing section, FIG. 31 is a top view of the operation section, and FIG. 32 is a top view of the digitizer, Fig. 33 is an explanatory diagram of the standard LCD display screen, Fig. 34 is an explanatory diagram of zoom mode operation, and Fig. 35 is an explanatory diagram of the operation of the zoom mode.
Figures (a) and (b) are operation explanatory diagrams of the movement mode;
Fig. 6 is an explanatory diagram of the operation in the area designation mode, Fig. 37 is an explanatory diagram of the operation in the color create mode, Fig. 38 is an explanatory diagram of the operation in the enlarged continuous shooting mode, Fig. 39 is an explanatory diagram of the operation in the inset composition mode, and Fig. 40 The figure is a diagram explaining the operation of the registration mode.
Figure 1 is a functional diagram of the color copying apparatus of this embodiment, Figure 42 is an explanatory diagram of the inset composition mode, Figure 43 is a diagram showing a print image when a corner is moved, and Figure 44 is a control flowchart in color registration mode. 45 is a diagram showing the color components of standard colors, FIG. 46 is a control flowchart of the entire system, and FIG. 47 is a time chart of the entire system.
Figure 48 is an interrupt control flowchart, Figure 49 is RA
FIG. 50 is an explanatory diagram of the bit map, and FIG. 51 is an explanatory diagram of the operation of the projector. 11−−−□−−−−−− ■ 1−−−−−□−−−□−1 ■ −−−−−−−□−−−−−− ■ −−−−−−−−− ----- ■ ---・---------- b) Figure 17 (cL) Figure 17 1) 5JI! Hiro Y, M, C, MONO γ /'f CF3wIN Diarrhea 20 figure (l =) Figure 20 (C) Man? ) Figure 21-/- Figure Figure 25 (0) Figure 26 (C) Figure 2q (B Figure 42 Corner Sobutton Gin's Brit image L-----1--
---J 43rd Ward Colored Pot A Chige-F's 70-+V-F 44th Kasumi 45th Flash 470 Fig. 50

Claims (1)

[Claims] An image reading device characterized in that a plurality of reading sensors are arranged on the same substrate, and all the reading sensors are driven by synchronized transfer clocks.