JPS63125056A - Color image forming device - Google Patents

Abstract

PURPOSE:To convert the specific color of an original into an optional color by having a first mode in which a converted color specification means specifies the optional color in an original picture as a converted color and a second mode in which the color stored in a specific memory is specified as the converted color. CONSTITUTION:As for respective color data (Yi, Mi and Ci) inputted in a color conversion circuit, the color component ratios of the data are inputted in window comparators 156-158 as a yellow ratio, a magenta ratio and a cyanogen ratio. In the comparators when the ratios exist between the compared superior value and the compared inferior value of the respective color components set by a CPU bus, the inputted color is decided to be a desirable color and the output of three inputs AND 165 becomes one and is inputted in the S0 input of a selector 175. The desirable color data after being converted are respectively inputted in the inputs 1-3 of the selector 175 as a Y component, an M component and a C component and the conversion of colors is executed when the S0 input is one.

Description

[Detailed description of the invention] Technical fields> The present invention relates to a color image forming apparatus.

<Prior Art> Color copying apparatuses having a color conversion mode for converting a specific color of a color image into another color are conventionally known.

Conventional color conversion involves converting between the three primary colors R, G, and B in the additive color method, or between the three primary colors Y, M, and C in the subtractive color method, or converting only the skin color part to the desired skin color. It was limited.

Therefore, it is not possible to freely convert the original predetermined color to any other color, and the color expression is limited.

(Objective) In view of the above-mentioned problems, the present invention is capable of converting an original predetermined color into an arbitrary color. [Embodiment] The present invention will be described in detail below 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 has 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 document for each color and converts it into an electrical digital image signal. Further, 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 1 will be explained.

3 is an original, 4 is a platen glass on which the original is placed, and 5 is a rod array for collecting a reflected light image from the original that has been exposed and scanned by a halogen exposure lamp 10 and inputting the image to a full-color sensor 6. 5. It is a lens. 6. 7
．． 10 as a document scanning unit 11, which performs exposure scanning in the direction of arrow A1. The color separation image signals read line by line without exposure scanning are amplified to a predetermined voltage by a sensor output signal amplification circuit 7, and then inputted to a video processing unit to be described later via a signal line 501 where they are processed. Ru.

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 St 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
13 etc. 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 developer 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 contact the photosensitive drum 715 and perform development; 73
0Y, 730M, 730C, and 7308 are toner hoppers that hold spare toner, and 732 is a screw that transports the developer, and these sleeves 731Y~
731Bk, l-ner hopper-730Y~730B
developer unit 726 by k and screw 732.
are constructed, and these members are connected to the rotation axis P of the developer unit.
are arranged around the. For example, when forming a yellow toner image, yellow toner development is performed at the position shown in the figure, and when forming a magenta toner image, the developing unit 726 is rotated around the axis P in the figure and exposed to light. A developing sleeve 731 in the magenta developing device is placed in contact with the body 715.
Place M. 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 and 736 are paper feed cassettes that store paper (paper sheets), 737 and 738 are paper feed rollers that feed paper from the cassettes 735 and 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 wound around the transfer drum 716 while the leading edge is carried by a gripper to be described later, 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 control section 13 of the reader section 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) and 504゜503.50, respectively.
5 etc. to obtain the desired copy (Program ROM2
3. 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. i.e. 505
is a signal line for inputting coordinates, area instructions, copy mode instructions, magnification ratio instructions, etc. during document editing, for example, movement 1 composition. A signal line 503 connects the CPU to 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/F2
9.30 is a serial I like Intel 8251.
/F LSI etc., and although not shown, the digitizer 16. The motor driver 15 also has a similar circuit. The interface protocol between the CPU 22 and the motor driver 15 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.

HSYNC and SRCOM (511 to 516) are interface signals between the color printer section 2 and the reader section 1 in FIG. 1, respectively. The image signal VIDEO 514 read by the reader 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 l, 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 etc. based on the ITOP interrupt. 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. sent to.

VCLK 513 is a synchronous clock for sending an 8-bit digital video signal 514 to the color printer unit 2, and for example, as shown in FIG. 4(b), the video data 514 is sent through flip-flops 32 and 35. .

H3YNC515 uses VCLK513 from BD signal 512
Created in sync with. Main scanning direction synchronization signal, B
Strictly speaking, the VIDEO signal 514 has the same period as H'5YNC 515 and is sent out in synchronization with H'5YNC 515. This is BD
Since the signal 515 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. If the BD double signal is synchronized as it is, jitter will occur in the image, so the jitter is generated based on the BD double signal. This is because H8YNC515, which is generated in synchronization with VCLK, is required. SROOM is a signal line for half-duplex bidirectional serial communication, and is synchronized with the 8-bit serial clock 5CLK between synchronization signals CBUSY (command busy) sent from the league unit as shown in Figure 4 (C). A command CM is then sent, and in response, a status ST is returned from the printer unit in synchronization with the 8-bit serial clock between 5BUSY (status busy). This timing chart shows that the status "3CH" was returned in response to the command "8EH", indicating that the league division sends instructions to the printer division, such as color mode, cassette selection, etc., and status information of the printer division, such as a jam. , no paper, weight, etc., are all exchanged via this communication line SRCOM.

FIG. 4(a) shows a timing chart for transmitting one four-color full-color image based on ITOP and HSYNC. The ITOP 511 is generated once every one or two rotations of the transfer drum 716, and the image data for ■ is a yellow image, ■ is a magenta image, ■ is a cyan image, and ■ is a Bk image data. , a full-color image of four superimposed colors is formed on the transfer paper. HSY
For example, NC has an A3 image length of 420 mm in the longitudinal direction and an image density of 16 pej in the feeding direction! /mm, 420X
16=6720 times, and this is simultaneously input to the clock input to the timer circuit 28 in the controller circuit 13, and after a predetermined number of counts,
An interrupt HINT 517 is applied to the CPU 22. This allows the CPU 22 to control the image in the feeding direction,
For example, it controls sampling, movement, etc.

(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 then adjusted to a predetermined level by the amplifier circuit 42. amplified.

41 is a CCD 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 (1/16 mm) as one pixel, 10
24 pixels, that is, 1 pixel as shown in the figure, in the main scanning direction
B.

Divided into 3 by R, total 1024 x 3
= 3072 effective pixels. On the other hand, each chip 5
8 to 62 are formed on the same ceramic substrate, and the 5th sensor (58, 60, 62) is on the same line LA.
Above, 2° 4th is 4 lines (62,5p) from LA.
mX4 = 250 μm) on the line LB, and scans in the force direction of the arrow AL when reading the document. Each of the five CCDs is driven independently and synchronously by the 1st and 3.5th drive pulse group 0DRV518 and the 2.4th drive pulse group EDRV519. 0DRV5
0OIA, 002A, OR3 and EDRV included in 18
519i: EOIA, EO2A, and ER3 included are charge transfer lock and charge reset pulses in each sensor, respectively; 1, 3. Due to mutual interference and noise limitations between the 5th and 2nd and 4th signals, they are generated in complete synchronization so that there is no jitter between them. For this reason, these pulses are generated from one reference oscillator source 05C58' (FIG. 5).

FIG. 7(a) shows 0DRV518. The circuit block that generates the EDRV 519, FIG. 7(b) is a timing chart, and is included in the system control pulse generator 57 shown in FIG. Clock KO335, which is the frequency-divided original clock 0LKO generated from a single 03C58'
is a clock that generates reference signals 5YNC2 and 5YNC3 that determine the generation timing of 0DRV and EDRV,
5YNC2 and 5YNC3 are presettable counters 64 set by a signal line 539 connected to the CPU bus.
．． The output timing is determined according to the setting value of 5.
YNC2, 5YNC3 is a frequency divider 66°67 and a drive pulse generator 68. Initialize 69.

In other words, the CLKO output from one oscillation source O8C is based on the HSYNC515 input to this block.
Note that each pulse group of 0DRV518 and EDRV519 is generated by a frequency-divided clock that is all generated synchronously. Here, the sensor drive pulses 0DRV518 obtained in synchronization with each other are applied to the 5th sensor at 1, 3°, and the EDR
V519 is supplied to the 2.4th sensor, and each sensor 5
8. 59. 60. Video signals Vl to v5 are independently output from 61°62 in synchronization with the drive pulse, and the fifth
Each channel shown in FIG. 40 is amplified to a predetermined voltage value by an independent amplification circuit 42, and is passed through the coaxial cable 501 (FIG. 1) as shown in FIG. V3°v5 becomes v2.v5 at the timing of EO3534. The v4 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.

It is separated into three colors: B (blue) and R (red).

Therefore, after S/H, there will be 3×5=15 signal processing systems. FIG. 8(b) shows a timing chart of the digital data A/Dout that is sampled and held for one channel, amplified, and then input to the A/D conversion circuit 45 and multiplexed. 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 5iG as shown in Figure 8(b).
As shown in A, the order is G→B-+R, and the sample and hold circuit (S/H) 250 converts the sample and hold pulses for each color into parallel signals for each color using IG535, 5HB536, and 5HR537. Figure 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) C characteristic), and then the pulse GSEL is applied again to multiplex into the l-system signal.

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.

Five A/D converters process color signals from a total of 15 systems (5 channels for each of the three colors B and R). 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 the scanning channel 2.4 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 the last pointer WPO75, WPE76, and one line is written. When the minute writing is completed, WPO or WPE is incremented by +1. WPO75 is common to channel 1°3.5, WPE7
6 is common to 2.4.

0WR3T540. EWR3T541 is a signal that initializes the values of the respective line pointers WPO75 and WPE7'6 and returns them to the beginning, and 0R3T542.
ER5T543 is a signal that returns the value of the read pointer (pointer at the time of reading) to the beginning. Channels l and 2 now
This will be explained using an example. As shown in FIG. 9(a), channel 2 is ahead of channel l by 4 lines, so when channel 2 reads and writes to the FiFo memory 71 for the same line, for example line 1 reads line ■. Therefore, if WPE is advanced by 4 from the write pointer WPO to the memory, then when reading from the FiFo memory with the read point value of - the time to read each, channel 1.
The same line is read out for channel 3.5 and channel 2.4,
This means that the deviation in the sub-scanning direction has been corrected. For example, in FIG. 9(b), for channel l, WPO is the first line 1 of the memory.
There is WPO on channel 2, and at the same time, WPE on channel 2 is pointing to line 5, which is the fifth line from the beginning. If you start from this point, when WPO indicates 5, WPE will indicate 9, and the line ■ on the document will be written in the area where the pointer is 5. From then on, both RPO and RPE (read pointers) will be advanced in the same way. All you have to do is read it out cyclically.

FIG. 9(c) is a timing chart for performing the above-described control, and image data is sent one line at a time in synchronization with the H3YNC515. EWR3T541,0W
R8T540 is generated with a shift of 4 lines as shown in the figure, and 0R3T542 is FiF.

Memory 70. 72. 74 capacity, therefore 5 lines! =, ER5T543 is generated every 15 lines for the same reason. On the other hand, when reading, first, one line at 5 times the speed of channel 1, then one line from channel 2, then 3 channels, 4 channels, 5
By reading the channels sequentially, 1) continuous signals from channels 1 to 5 can be obtained during ISYNC. Figure 9(d) IRD~5RD (544~548)
indicates the effective 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. 10(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. The selector 82 selects A (■), closes the gate 80 (■), and opens the gate 81 so that one line of this image data is stored in the black level RAM 78. That is, the data line is 5
51 → 552 → 553, and on the other hand, the output of the address counter 84 initialized with H8YN should be input to the address input of the RAM (■ is output, and the black level signal for one line is stored in the RAM 78. (This is the black reference value import mode).When reading the image, it is stored in RAM7.
8 is in data read mode, data line 553 → 5
Each line and each pixel are read out and input to the B input of the subtracter 79 through a path 57. 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(i) = 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 original 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 in Figure 1O(a), but the only difference is that black correction uses a subtracter 79, whereas 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 the copying or reading operation, the 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, main scanning direction A4
If it has a width in the longitudinal direction, it is 16peI! /mm 16X297mm=4752 pixels, i.e. at least RA
The capacity of M is 4752 bytes, and as shown in FIG.
Then, the RAM 78' has the following information as shown in Fig. 11(C).
Data for the white plate for each pixel is stored. On the other hand W
Data D after correction for read value Di of the normal image of the i-th pixel for i.

= D i X F F H/ W i. Then, the CPU in the controller (Fig. 2 22) closes the gate 80' for the latches 85'■', ■', ■', and ■', opens the gate 81', and selects B by the selectors 82' and 83'. It outputs the data so that it is selected, and makes the RAM 78' accessible to the CPU. Next, FFH/Wo for the first pixel Wo, FF/W for WH
, . . . are performed in sequence to replace the data. After completing the blue component of the color component image (Fig. 11(d) St
epB) Similarly, the green component (Step G) and the red component (Step R) are sequentially performed for the original image data Di input thereafter.

= Gate 80' so that DiXFFH/W+ is output
is open (■'), 81' is closed (■'), selector 83' selects A, and coefficient data FFH/W i read from RAM 78' is connected to signal line 553→
557 and is input from the - direction. Original image data 551
The product is multiplied by and output.

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

Furthermore, in this configuration, one line of image data can be input at high speed, and the CPU 22 can access RD and WR, so that any position on the document, for example, the coordinates (Xmm, ymm), move the scanning unit by (16xx) lines in the X direction, and import this line into the RAM 78' by the same operation as described above.
By reading the data of the 6xy) pixel, B, G
, H component ratio can be detected (hereinafter, this operation will be referred to as "line data capture mode"). Furthermore, those skilled in the art will easily infer that with this configuration, an average of multiple lines (hereinafter referred to as "average value calculation mode") and a density histogram (hereinafter referred to as "histogram mode") can be easily obtained. .

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 (fifth column) in accordance with the relative luminous efficiency characteristics of the human eye. Here, white = OOH, black = FF
The image source input to the image reading sensor, such as a normal reflective original and a transparent original such as a film projector, and even the same transparent original, depending on the sensitivity and exposure condition of the film, negative film, positive film, etc. Since the input gamma characteristics are different, the first
As shown in Figures 3(a) and 3(b), there are multiple LUTs (look-up tables) for logarithmic conversion, which are used depending on the purpose. To switch, signal line 1 go,
1 gl, l g2 (560-562) l:
As the I10 port of the CPU (22),
This is performed by inputting an instruction from an operation unit or the like. Here each B,
The data output for G and H corresponds to the density value of the output image, the output for B (blue) is the amount of yellow toner, the output for G (green) is the amount of magenta toner, and the output 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. The spectral characteristics of the color separation filter placed on each pixel of the color reading sensor (as shown in Figure 14) have unnecessary transparent areas such as diagonal and lined areas. It is well known that the color toners (Y, M, C) that are used in the image also have 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, M
i, the minimum value of C4), set it as a smear (black), and then add black toner (smear insertion);
An under color removal (UCR) operation that reduces the amount of each coloring material added according to the added black component is also performed.
The circuit configuration of masking, inking, and UCR is shown. The characteristics of this configuration are: - It has two masking matrices, and can be switched at high speed with one signal line "Ilo". - One signal line "110" indicates whether UCR is present or not. Can be switched at high speed ■It has two circuits that determine the amount of smear, and can be switched at high speed with "Ilo". First, prior to image reading, a desired first matrix coefficient M1. Second matrix stitch number M2
is set from the bus connected to the CPU 22. In this example, Ml is in registers 87-95, M2 is in registers 96-104.
is set to . Also 111-122, 135, 13
1 is a selector, and when S terminal = “1”, A
Select , and select B when it is “0”. Therefore matrix M
When selecting 1, switch signal MAREA564="1
”, to select matrix M2, set it to “O”. 123 is a selector, and selection signals Co, C, (
566, 567), outputs a, b, and c are obtained based on the truth table shown in FIG. 16(b). Selection signal C8+
CI and C2 correspond to color signals to be output,
For example, in the order of Y, M, C, Bk (C2゜Cl+C,)
= (0,O,O), (0,0,1), (0
1, O), (1, 0, 0), and then (0, 1, l) as a monochrome signal to obtain a desired color-corrected color signal. Now (Co, CII C2) = (
0°0.0) and MAREA="l", the outputs (a, b, c) of the selector 123 contain the contents of registers 87°88, 89+7),
bMl, CCI) is output. on the other hand,
Min (Yi
The black component signal 574 calculated as , Mi, Ci) = is subjected to a -order transformation such that Y=ax-b (a, b are constants) at 134, and then (passed through the selector 135) to the subtracter 124. 125. It is input to the B input of 126. Each subtractor 124 to 126 uses Y as undercolor removal.
=Yi-(ak-b), M=Mi
-(ak-b), C=Ci-(ak
-b) is calculated and sent via signal lines 577, 578, 579 to the multiplier 127. It is input at 128°129. Selector 135 is the signal UARE
Controlled by A565, UAREA56'5 is UC
The configuration is such that R (undercolor removal), presence and absence can be switched at high speed with "Ilo". Multiplier 127. 1
At 28°129, the A inputs have (ayl, −
bMt, −Cct), and the B input has the above-mentioned (Y i
-(ak-b), M i-(ak-b
), Ci − (ak − b)) = (Yi, Mi,
As is clear from the figure, since Ci) is input,
The output Dout has the condition of C2=0 (Y o r M o
r C selection) and Yout=Yix (aYl) +M
iX (-bMl) +CiX (-CC1) is obtained, and yellow image data 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. Colors are selected according to the development order of the color printer (Co, C+) as described above.

C2) is controlled by the CPU 22 according to the table in FIG. 16(b). Registers 105-107, 108-1
10 is a register for forming a monochrome image, and based on the same principle as the above-mentioned masking color correction, MONO=k,
Weighting of each color is obtained by addition using Yi+Il 1 Mi+m I C4. Switch store name MAREA5
64°UAREA565. KAREA587 performs high-speed switching between masking color correction coefficient matrices M1 and M2 as described above, UAREA565 performs high-speed switching between UCR and non-UCR, and KAREA587 outputs the black component signal (through signal line 569 → selector 131 to Dout). ), that is, K = M i n (
Y i , M i .

C4), Y=ck-d or Y=ek-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 is a configuration that can be applied when images obtained from image input sources with different color separation characteristics or multiple images with different black tones are synthesized as in this embodiment. , UAREA, KAREA
(564, 565° 587) is an area generation circuit (described later).
51) in FIG.

FIG. 17 is a diagram for explaining area signal generation (the aforementioned MAREA564°UAREA565.KAREA5B7, etc.). The area refers to, for example, the shaded area in FIG. 17(e), which is the area in the sub-scanning direction AB,
Timing chart in Fig. 17(e) for each line)A
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 CPU 22 can programmably obtain a large number of generation positions of the region signal, length of one section, and length of one section. 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 AREAO to AREAAn are generated.
It has two RAMs each having an n-bit configuration.

(Figure 17(d) 136.137). Now, Figure 17 (
If we obtain area signals AREAO and AREAn as shown in b), bit O of RAM address XI+X3
Set 1'' to , and bit 0 of the remaining addresses are all “0”
Make it. On the other hand, RAM address l+ XI +
Set "l" to x21 x4, and set all bits n of other addresses to "0'°. Data in the RAM is read out sequentially in synchronization with a constant clock based on H3YNC (for example, As shown in FIG. 17(C), data "1" is read at addresses X1 and X3.This read data is shown in FIG.
8-0 to 148- J of flip-flop to J- of n.

Since it is connected to both K terminals, the output is a toggle operation, that is, R
When "1" is read from AM and CLK is input, the output changes from "0' to "l", "1" to "0", and the 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 R
It is AM. In order to switch the area section at high speed, for example, while reading data from RAMA 136 line by line, the CP
U22 (Figure 2) performs memory write operations for different area settings, alternately generating section generation and CP
Switch memory writing from U. Therefore, the 17th
If you specify the shaded area in figure (f), A-B→A-B→
RAMA and RAMB are switched as shown in A, which means (C3, C4, C3) = (0,
1, 0), the counter output counted by VCLK is sent to the RAM through the selector 139 as an address.
A136 (Aa), gate 142 opens, gate 144 closes, and is read from RAMA 136, and the total bit width, n bits, are transferred to J- to flip-flop 148-0.
~148-n according to the set value
Interval signals AO to AREAn are generated. CP to B
Writing from U is performed during this time using the address bus A-Bus, data bus D-Bus, and access signal R/W. Conversely, when generating a section signal based on the data set in RAMB137 (C3+C41C5)
You can do it in the same way by setting = (l+ 0+ 1),
Data can be written from the CPU to the RAM 136. (Hereafter, these two RAMs will be referred to as A-RAM and B, respectively.
-RAMSC3, C4°C5 is connected to AREA control signal (AR
CNT)...C3゜C4, C5 are I1 of the CPU
(output from port 0).

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 adder 155 on one side and sent to the B input of divider 152° 153 and 154, and the other to the A input respectively. , the input color component ratio is yellow ratio ray=Yi/Y i + M i + C
i,? Zenta ratio r a m = M i / Y
i 1M 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, therefore (yu, mu, Cu)
When the ratio is included between

When ml≦ram<mu, output = '1',
When Cj7≦rac<Cu, the output becomes “l”, and when the above three conditions are met, it is determined that the input color is the desired color, and the output of the three-man AND 165 becomes 1, and the selector 175 selects So large. Input is input. The adder 155 is C
Signal line CHGC output from I10 boat of PU22
NT607 output 603=1 is output. Therefore “0”
In this case, the outputs of the dividers 152, 153, and 154 are the A inputs as they are. That is, at this time, registers 159 to
164 is set with the desired color component ratio (and color density data). 175 is a selector for 4 inputs and 1 output, and inputs 1, 2, and 3 are the desired color data after conversion. are input as the Y component 2 component and C component, respectively, while data Vin 4 is input with masking color correction and UCR applied to the scanned original image.
It is connected to Dout in FIG. 16(a).

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

When it is outside the area "0'°," color conversion is performed when it is "1", and when it is "0'°, it is not printed. S2, 83 human power C8°C,
(61,6,617) is c in FIG. 16(a). .

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

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

Perform cyan image formation. A 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. If y', m', and C' are color component ratios, CHG CN T 607 = "1"
Therefore, the output 603 of the adder 155 is (Y
i + M i + Ci ), and the multiplier 169 ~
Since it is input to the B input of 171, the selector input 1.
2. 3 respectively (Yi + Mi + C1)Xy',
(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/, J, and cl are envelope component yield data, CHGCNT is set to “0” and the signal 603-“1” is outputted from the multipliers 169 to 171, and therefore input to the selector 175. 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 CHAREA0615 is the section length as described above.

Since the number can be set arbitrarily, this color conversion can be applied only to multiple regions rl+r2+r3 as shown in FIG. 18(d), or by preparing multiple circuits as shown in FIG. 18(a), for example, Red to blue in r1, red to yellow in r2, r3
Color conversion across multiple areas and multiple colors, such as changing from white to red inside, is also possible in real time due to its high speed. 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 CH3E.
Selected by LI and output to output 619. Further, the area signals applied to each circuit are CHAREAO to 3, and CH3EL0 and CH3EL1 are also generated by the area generation 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 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="0", the selector 176
The input is selected, gate 17B is closed, gate 179 is open, 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 becomes “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 as in Fig. 16, C8°c,,c
2 (566, 567, 56g), and by the GARA626 generated by the area generating circuit in FIG. 17, for example, as shown in FIG. With a gamma characteristic of B, 1
The structure is such that it can be obtained as a single print.

This gamma RAM has two types of variable magnification characteristics, A and B, and can be switched quickly for each area, but by adding more of these, 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, this gamma conversion RAM is configured so that the characteristics can be switched individually for each color, and is rewritten 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 center 0,
As shown in Fig. 19(d) and (e), the settings move to the left from -l 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 +l → +2 → +3 → +4 and RAM177
can be rewritten in the same way. That is, on the standard screen,
Y, M, C, Bk by touching e or `` key.
Alternatively, the entire MONO table (RAM 177) is 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), y, M, C, Bk! :: Then, only the areas in the RAM 177 are individually rewritten. That is, for example, when changing the color tone of the yellow component, screen P420
When you press the inner touch key y, the black band display extends upward, and the conversion characteristics change to the y1 direction as shown in Figure 19 (Cf)-Y, so the yellow component becomes darker, and when you press the touch key y2
If you touch , the characteristic will be selected in the y2 direction, which will make the yellow component fainter. 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.

Figure 20(a) 180. 181 respectively in the main scanning direction, for l lines, for example, 16 p e l / m m
, 16 x 29 at 297mm in A4 longitudinal direction
7 = FiFo memory with a capacity of 4752 pixels, and as shown in FIG. 20(b), A W E , B W
Write operation to memory during E = “L o”,
A read operation is performed in the section where ARE, BRE = “Lo”, and when ARE = “Hi”, the output of A, BRE = “Hi”
”, the output of B is in a high impedance state, so each output is connected to the wire FOR, and Dout6
27. FiFoA, FiFoB180
, 181 have a write address counter and a read address counter (internal pointers are advanced by the clock in FIG. ,W
Video data transfer lock in the system to CK V CL
If you give CLK that has been thinned out to K588 by rate multiplier 630, and give CLK that is not thinned out to RC, +,:,VCLK588, the input data to this circuit will be reduced at the time of output, and if you give the opposite, it will be enlarged. It is well known that the read and write operations of FiFoA and FiFoB are performed alternately. Furthermore, the W address counter 182. in the FiFo memory 180°181. R address color 183
is the enable signal (WE, RE...635°63
6) is configured to proceed according to the clock only during the enable period "Lo", and is initialized by RST (634) = "Lo", for example, as shown in Fig. 20(d).
RST (in this configuration, synchronization signal H in the main scanning direction)
3YN), then n.

Write pixel data by setting AWE="Lo" (same for RWE) for the m pixel from the nth pixel, and set T"UfL="Lo" (same for f'F'i:) for the m pixel from the n2th pixel. When the pixel data is read out, it moves from ERITE data to READ data in the same figure.In other words, by changing the occurrence position and section of n pig (and RWE) and shoulder 1 (and old 1) in this way, Figure 20(e)(f)(g)
The image can be moved arbitrarily in the main scanning direction as shown in FIG. AWE, ARE, BWE input to this circuit.

Old 1 is generated as described above by the area generation circuit shown in FIG. 17(d).

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 the memories 185 to 189 are each connected in the main scanning direction.
It has a capacity of 2 lines per line, and has a piFo structure in which a total of 5 lines are sequentially and cyclically stored and output simultaneously 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 a smoothing circuit 191N195, where averaging is performed in units of pixel blocks of 5 different sizes shown in the figure from IXI to 5×5, 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. Furthermore, 19B 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 for averaging.

The gain circuit 196 has a look-up table (LUT) configuration, and is a RAM into which data is written by the CF'U 22, similar to the gamma circuit shown in FIG. 19(a) described above.
When the input EAREA 652 is set to "Lo", the output becomes "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
As the operator operates the sharpness by 1°2 and 3.4 in the direction of sharpness, the conversion characteristic of the gain circuit is rewritten by the CPU 22 as shown in FIG. 21(c). On the other hand, when the operator operates 1', 2', 3', and 4' in the direction of "sharpness", the switching signal 5M5 of the selector 197 is activated.
L652 increases smoothing block size by 3X
3. They are selected to be as large as 3x5, 3x7, and 5x5. At the center point C, 1×1 is selected, and the gain circuit E
AREA651="LO", the input Din is neither smoothed nor edge emphasized, and the adder 199
is output as Dout. In this configuration,
For example, the moiré that occurs on halftone originals can be improved by smoothing, and the sharpness of characters and line drawings can be improved by edge enhancement. When there are line drawings in the same document, for example, if smoothing is applied to improve moiré, the characters will become blurry, and if edges are emphasized, moiré will appear strongly (Fig. 17(d)). ) By controlling EAREA651 and 5M5L652 generated in 5M5L652, for example, 3×5 smoothing is selected with 5M5L652, and EAREA651 is changed to A' as shown in FIG. 21(e).
, B' and applied to the original cross dot image, moiré is improved for the dot image and sharpness is improved for the character area. Signal TM
AREA660 is generated by the area generation circuit 51 like EAREA651, and when TMAREA="1", the output Do
ut=“A+B”.

When TMA RE A = “0”, Dout = “0”
becomes. Therefore, by controlling the TMAREA 660, if a signal like the one shown in FIG. 21(f) 660-1 is generated, the shaded area (inside the rectangle) can be extracted and the signal shown in FIG. 21(g) 660-1 can be generated.
When a signal such as 0-2 is generated, the shaded area (outside the rectangle) is 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 recognizing the main document position, after the black correction and white correction shown in Fig. 1O and Fig. 11 (a), the masking calculation coefficient shown in Fig. 16 (a) is (,,5,,m,for monochrome image data generation is selected, and C8, C,,C2 in the same figure are (0,1
゜1), UARE so as not to perform UCR (undercolor removal)
By setting A565="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 keys are detected by a commonly used key scan.
The signal is input from the I10 port to the CPU 22 through the receiver 208.

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 lighting voltage of the lamp controller 212 is determined by the value of an 8-bit input PJCNT 657 as shown in FIG. 24, 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, and adjusts the lamp lighting voltage V by performing shave correction (S2) and AE (S3), which will be described below, according to the operating procedure from the operation panel, which will be described later.
exp is determined and printer 2 is activated (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. Seven images are formed according to the ITOP signal, and the lamp is darkly lit by DA (corresponding to the minimum exposure voltage) until the next exposure, thereby preventing deterioration of the filament due to rush current when the lamp is turned on, thereby extending its life. Thereafter, similarly, after M image formation, C image formation, and black image formation (S7 to 512), IJCNT="
OO” and turn off the lamp.

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 v1. 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. or,
By extracting shading data from unexposed areas, a wide dynamic range can be achieved even in the case of negative film. If the film is not a color negative film, set the film carrier 2 fitted with an ND filter (or without a filter), press the shading start key on the LCD touch panel, and 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. Then,
The scanner unit moves to near the center of the image projection section, and
R, G, B CDI line or average value of multiple lines
Figure 11 (a) shows shading data for each.
) into RAM7B' and turn off the projector lamp.

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 V or V2 depending on the selection result of color negative or not, and the pre-scan (
AE) is performed. Blisscan is used to determine the exposure level of the film to be copied at the time of photographing, and is performed according to 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 appearance frequency of the R signals is accumulated to create a histogram as shown in FIG. Creation mode °'). From this histogram, find the m a x value shown in the figure, and
The maximum and minimum R signal values Rmax and Rmin at which the histogram crosses a level of 1/16 of the x 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 = C, /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. C1, C2 and C3 are values determined in advance according to the gamma characteristics of the film, and are approximately 40 to 50 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 lit with the lamp lighting voltage V obtained in this way, and the logarithmic conversion table (a) in FIG. 3 and the masking coefficient (a) in FIG. 16 are set to appropriate values according to the film type. set and normal copy operations are 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.
L for reflective originals, 2 for color positives, 3 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... They may be used together. 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 changes, return to ■ in Fig. 29 (a), and if it does not change, return to ■ and repeat the same operation again. 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 film's intended use 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.

Input VIDEODATA 800 input circuit 9
00, it is latched at the rising edge of VCLK801 and synchronized with the clock. ((B) Figure 800゜80
1) VIDEODATA81 output from the latch
5 is corrected in gradation using an LUT (look-up table) 901 composed of ROM or RAM, and subjected to D/A conversion by a D/A (digital-to-analog) converter 902.
A real analog video signal is generated, and the generated analog signal is input to comparators 910 and 911 at the next stage and compared with a triangular wave, 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) Fig. 808,
809). That is, the synchronous clock 2VCLK803 with twice the frequency of VCLK801 is used, and the negative side is, for example, J
A triangular wave WVI is generated by a triangular wave generating circuit 908 according to a reference signal 806 for triangular wave generation whose frequency is divided by two by a flip-flop 906, and the other is a signal 807 which is generated by dividing 2VCLK by six by a frequency divider circuit 905. ((B) Figure 8
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 is inverted to synchronize with HSYNC802, which is generated in synchronization with VCLK.
YNC initializes the circuits 905 and 906 at the timing of H3YNC. With the above operation, CMPI 910
．． CMP2 911 outputs 810, 8111. : is 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 "0".
'', the laser goes 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 input to the circuit is "FF" for "white" and "00" for "black," the output of the D/A converter 902 changes as shown in (C) of the same figure. On the other hand, the triangular wave (
a) Te is WVI, (b) Te is WV2 (so the outputs of CMPI and CNP2 are respectively,
PWI, PW2 (the pulse becomes narrower as it moves from "black" to "white". Also, as is clear from the figure, when PWI is selected, the dots on the print paper change from P1 to
It is formed at intervals of P2→P3→P4, and the amount of change during the pulse has a dynamic range of Wl. On the other hand, when PW2 is selected, the dots are formed at intervals of P5→P6, and the dynamic range during the pulse becomes W2, and each dot is 3.
It's doubled. By the way, for example, printing density (resolution)
When PWI, approximately 400 lines/inch,
When PW is 2, it is set to about 133 lines/inch, etc. Also, as is clear from this, when PWI is selected, the resolution is improved by about 3 times compared to PW2, while PWI is selected.
When W2 is selected, the dynamic range of the pulse width is about three times wider than that of PWl, so the gradation is significantly improved. For example, if high resolution is required, PWI
When high gradation is required, 5CR3EL804 is applied from an external circuit so that PW2 is selected. That is, figure (
912 in A) is a selector, and when 5CR3EL804 is 0", A input is selected, that is, when PWI is "B", PW2 is output from output terminal d, and the laser lights up only during the final pulse, and the dot Print.

The LUT 901 is a table conversion ROM for gradation correction, and a table switching signal of 812.813, . For example, if 5CR3EL804 is set to 0'' to select PWI, all outputs of ternary counter 903 will be ``O'' and 90
A correction table for PWI among 1 is selected. Also I
(2 is switched depending on the color signal to be output, for example, Ko, etc.).

When K2=“0.0.0”, yellow output, “0.l.

When it is ON, it outputs magenta, when it is "1. O, O" it outputs cyan, and when it is "l, 1. O" it outputs black.

That is, the gradation correction characteristics are changed for each color image to be printed. 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 0. By combining , , and , 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, to select PW2, set 5CRSEL to “
When set to "1", the ternary counter 603 counts the synchronizing signal of the line, "1" → "2" → "3" → "1" → "
2" → "3" → .

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 changed from "FF", ie, "white" to "0", ie, "black". 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. In the same figure (B), P
Tone correction characteristics A for each line when W2 is selected,
B and C, the pulse in the main scanning direction (laser scanning direction) is varied using the aforementioned triangular wave, and at the same time, as shown in the figure, three levels of gradation are provided in the sub-scanning direction (image feeding direction). Improve gradation characteristics. That is, in a part where the density change is steep, the characteristic A is dominant and steep reproducibility is reproduced, the gentle gradation is reproduced by the characteristic C, and the characteristic B reproduces the effective gradation for the intermediate part. Therefore, even if PWI is selected as described above, high resolution and a certain level of gradation are guaranteed, and PW2
If you select , you are guaranteed excellent gradation. Furthermore, regarding during the aforementioned pulse, for example, in the case of PW2,
Ideally, W during the pulse satisfies O≦W≦W2, but due to the electrophotographic characteristics of laser beam printers and the response characteristics of laser drive circuits, etc., dots are not printed during pulses shorter than a certain width (no response occurs). ) Area Figure 28 O≦W≦
wp and the region where the concentration is saturated Fig. 28 wq≦W≦
There is W2. Therefore, the pulse is set so that the pulse and the concentration vary 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), it changes from wp to wq during the pulse, further guaranteeing the linearity between the input data and the density. .

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

Note that the signal K in FIG. 26(A). l KIn K2
+5CR3EL and LON are output from a control circuit (not shown) in the printer controller 700 in FIG. The time is controlled to 5CRSEL="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.
It is scanned horizontally at high speed in the width indicated by arrows A-B in the figure, passes through the r/θ lens 13 and 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 feed 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 rotation is performed at a constant speed, the planar image is sequentially exposed and a latent image is formed.
A toner image is formed by toner development by the developing sleeve 731. For example, in response to the first document exposure scan in a color reader, the developing sleeve 731
If 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 repeated for M (magenta), C (cyan), and BK (black) images, and each toner image is superimposed on the paper sheet 754.
A full color image is formed using colored 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 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. It is a position detection board, and the point pen 421 is used to specify its coordinates. These keys and coordinate input information are transferred to the CP via bus 505.
Data is exchanged with U22, and this information is stored in RAM24 and RAM25 accordingly.

<Standard screen description> 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 the screen POIO. When touch key b (enlarge) is pressed, the size and magnification are similarly displayed, and in this color copying apparatus, 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.
Auto page selection) 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. In manual zoom magnification mode MIIO, 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 the screen pioo shown 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 M2O0 is composed of four types of movement modes, each of which is a center movement M210, a corner movement M220, a specified 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, it 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. Binding allowance M
240 is a mode in which the selected paper is moved to the left and right in the feeding direction so as to create so-called binding margins.

Next, we will explain how to actually operate 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.

<Description 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
This is to copy only the image inside the designated area, and the masking mode M320 is to mask the inside of the designated area with a white image and copy. The image separation mode M330 further includes a color mode M331, a 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, the document is placed on the digitizer 16, and the 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 designated 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. At this time, if the designation 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 the 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 Fig. 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 wish to specify, press touch key C on screen P330, 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 is P'350
Here, the density of the printer's toner components, yellow, magenta, cyan, and black, is adjusted using the up and down touch keys. Here, on the screen P2S5, a black bar graph indicates the density specification state, 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 only difference from color balance mode M334 is that color create mode M400 operates on the entire document rather than on a certain area of the document. Description 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 rate at which edges are emphasized in a so-called character image or a smoothing effect is produced in a halftone image. Next, color create mode■
The setting method 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 pooo 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 H of 12, it will be fitted according to the moving destination area, and when it is small, the placed area will be automatically printed as a white image. controlled.

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 performing manual magnification setting only in the X direction, only in the Y direction, or at the same ratio in x and Y, the settings can be made by pressing 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 pooo shown 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 end key of 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
It consists of 730 three types of modes.

The color registration mode M710 allows the color after conversion to be registered when specifying the color conversion mode and paint mode of the color create mode M400 and area specification mode M300 described above. 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 you to copy by hand 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 the manual input of the coordinates to be registered is completed, touch key e is pressed, and touch key r, which is the start key for reading screen P712, is pressed.

After the touch key f is pressed, the operation is performed according to the process of the flowchart in FIG. 44. First, 1 halogen lamp with 5700
0 is turned on, the number of movement pulses of the stepping motor is calculated from the above-mentioned specified coordinates (sub-scanning direction) in 5701, and the original scanning unit 11 is moved by issuing the above-mentioned specified movement command. At step 5702, one line of the sub-scanning position specified by the coordinates in the line data import mode is loaded into the RAM 7B' in FIG. 11(a). 57
In 03, from this one line of data taken in, 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 registration/coordinates have been read, and if there are still more, processing for line spacing is performed at $701.

When all the reading positions are completed, the halogen lamp 10 is turned off in step 5705, and the original scanning unit is returned to the reference position H, P position, and the operation is completed.

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 pooo, 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 unit when equipped with the following. 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.
After setting the copy button (400 in Fig. 31) ON and performing AE operation to determine the exposure voltage, as shown in Fig. 25 (a), yellow, magenta, cyan,
Image formation is repeated in the order of 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 5lot, 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. 5
In 105, it is determined whether the document recognition mode is set, and if it is set, the scanning unit 1 of 5106-1
6 is scanned by the maximum original detection length of 435 mm, and the position and size of the original is detected by the aforementioned original recognition 200 via the CPU bus. Also, if it is not set, 510
The paper size selected in step 6-2 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. AREA-XY contains the document size and size information for each area, and AREA ALP
T is 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 the color coordinate information area 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 RAM 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 "l" is set at this time is RAM13
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, in step 3109-1, the following processing is performed on the mode within 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, if the specified area is selected in monochrome color mode, M A RE
The next coefficient is set in the register selected when 564 becomes active.

αYl, αY2. αY3 0. 0.
0βM! , 8M2. 8M3 0. 0.
0γC1, γC1, γC3'A, 'A, 'Ak2
, 12. m2 0. 0. 0th order,
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 MAREA 564 is "0". Next, for area 2 which is in paint mode, respective gate signals CHAREAO corresponding to the hits of the BIIMAP area described above are applied.

1, 2. Data is set in each register in FIG. 18(a) selected by 3. First, in order to convert all input videos, FF to yu159, l160
00. FF to mu161, OO to rl'1162
, set FF to Cu 163, OO to C1164,
AREA
Load from ALPT or REGI C0LOR,
Multiply each color data by the coefficient of the AREA DENS density adjustment data, and get y' 166 and m' 1, respectively.
67, c' Set the converted density data in 168. For color conversion of area 4, the above-mentioned yu159.・
. . , each of the density data before conversion shown in FIG. 49 is set with a certain offset value added to the register of the Cl 1164, and the data after conversion is set in the same way. In the color balance of area 5, the gate signal GA
Y of RAM177 selected by REA626 being 1”
, M, C.

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.

SRCOM sends a startup command to the printer using 5109.
516. 5IIO as shown in the timing chart of FIG. Detect ITOP, Y at 5ill
.

The M, C, and Bk output video signals Co, CI, and C2 are switched, and the halogen lamp is turned on at 5112. Sl 13
to determine the end of each video scan, and if it is finished, 51
Turn off the halogen lamp at 14, and turn off the halogen lamp at 5114 and 5115.
Check that the copy is complete, and if it is completed, return 511.
At step 6, a stop command is output to the printer and the copying ends.

FIG. 48 shows the signal HINT5 output from the timer 28.
17 is a flowchart of interrupt processing, and 5200
At -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, the timer shown in FIG.
RA one line of BIT MAP data indicated by ADD
Set in M136 or RAM137. In step 5201, the address of data to be set in the next interrupt is incremented by 1.

5202 has RAM136. RAM137 switching signal C
Output 3595, C4596, C, 593, 5203
Set the time until the next sub-scanning switch in the timer 28, and use the BIT MAM 17) shown below as X ADDt'.
The contents are sequentially set in the RAM 136 or RAM 137 and the gate signals are 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.

Effects> As described above, the color image forming apparatus of the present invention enables the color stored in the memory and the color in the original image to be arbitrarily specified as a converted color. It is possible to convert

[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 SRCOM, FIG. 5 is a detailed circuit diagram of the video processing unit in FIG. 2, and FIG.
) is a layout diagram of the color CCD sensor, and Figure 6(b) is the layout of the color CCD sensor.
The signal timing diagram of each part in Figure (a), Figure 7 (a) is C
FIG. 7(b) is a diagram showing the OD drive signal generation circuit (circuit inside the system control pulse generator 57).
8(a) is a detailed diagram of the analog color signal processing circuit 44 in FIG.
Figure (b) is a signal timing diagram of each part in Figure 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 a point correction circuit diagram,
Figure 0 (b) is an explanatory diagram of point correction, Figure 11 (a) is a white level correction circuit diagram, Figure 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 Cb) 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 control flow chart when using a film projector. 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, Fig. 35
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.

Claims (1)

[Scope of Claims] Predetermined color specifying means for specifying an arbitrary predetermined color in an original image; Conversion color specifying means for specifying a conversion color for the predetermined color; Color image forming means for forming the predetermined color with the conversion color. The conversion color specifying means has a first mode in which any color in the original image is specified as a conversion color, and a second mode in which a color stored in a predetermined memory is specified as a conversion color. A color image forming device characterized by: