JPH0734578B2 - Color image processor - Google Patents

Description

TECHNICAL FIELD The present invention relates to a color image processing apparatus.

[Prior Art] Conventionally, as color conversion of an input color image, it is considered that three input color signals of yellow, cyan, and magenta forming the input color image are each formed by a colorant having the same color as the input color signal. Instead, a color-converted image is obtained by forming an image with different color materials.

[Problems to be Solved by the Invention] By using the above-described color conversion method, the single color portion (yellow, magenta, cyan portion) of the input color image is surely converted into the designated color material.

However, in the above method, even the part where the two types of color materials become heavy and the image is formed is converted into a color different from the input color image, and it is not possible to convert only a specific color of the input color image. .

Furthermore, it is not limited to the above-mentioned three input color signals, and it is not possible to specify a specific color of the input image and perform color conversion of only the specified specific color.

[Means for Solving the Problems] In order to solve the above problems, the color image processing apparatus according to the present invention includes a color specifying unit for specifying a color to be converted when performing color conversion processing, and a color after conversion as a color after conversion. Selecting means for selecting one of a plurality of determined standard colors; position specifying means for manually specifying a position on the original containing the desired color so as to specify the desired color as a color after conversion; Illuminating means for illuminating the original by performing relative movement by illuminating the original at a position manually specified by the position specifying means by the illuminating means, and detecting the desired color according to the reflected light obtained, A first color conversion mode in which the color conversion processing is performed in order to convert the color to be converted on the original into the desired color detected by the color detecting unit, and the color to be converted on the original is selected. And a color conversion unit having a second color conversion mode for performing the color conversion processing so as to convert to the standard color selected by the unit.

〔Example〕

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

FIG. 1 shows an example of a schematic internal configuration of a digital color image processing system according to the present invention. As shown in the figure, this system has a digital color image reading device (hereinafter, referred to as a color reader) 1 in the upper part and a digital color image printing device (hereinafter, referred to as a color printer) 2 in the lower part. This color reader 1 includes a color separation means, which will be described later, and a CC.
With a photoelectric conversion element such as D, color image information of the original is read for each color and converted into an electrical digital image signal. The color printer 2 is an electrophotographic laser beam color printer that reproduces a color image for each color according to the digital image signal and transfers the color image to a recording paper a plurality of times in a digital dot form for recording.

First, the outline of the color reader 1 will be described.

Reference numeral 3 is a document, 4 is a platen glass on which the document is placed, and 5 is a rod door for collecting a reflected light image from the document exposed and scanned by the halogen exposure lamp 10 and inputting an image to the full-size full-color sensor 6. This is a ray lens, and 5, 6, 7, and 10 integrally form a document scanning unit 11 for exposure scanning in the direction of arrow A1. A color separation image signal read line by line during exposure scanning is amplified to a predetermined voltage by a sensor output signal amplification circuit 7 and then input to a video processing unit to be described later by a signal line 501 for signal processing. . Details will be described later. 501 is a coaxial cable for ensuring faithful transmission of signals. A signal 502 is a signal line for supplying a drive pulse for the full-size full-color sensor 6, and all necessary drive pulses are generated in the video processing unit 12. 8,9
Is a white plate and a black plate for white level correction and black level correction of an image signal, which will be described later, and by irradiating with a halogen exposure lamp 10, it is possible to obtain a signal level of a predetermined density, and a white level of a video signal. Used for level correction and black level correction. Reference numeral 13 is a control unit having a micro computer, which controls display of the operation panel 20, key input control and video processing unit 12 by a bus 508, and position of the original scanning unit 11 by signal lines 509, 510 by position sensors S1, S2. Via a signal line 503 to control the stepping motor drive circuit for pulse-driving the stepping motor 14 for moving the scanning body 11 by means of a signal line 503. All controls of the color reader unit 1 such as OFF control, light amount control, control of the digitizer 16 and internal keys via the signal line 505, and display unit are performed. The color image signal read by the above-mentioned exposure scanning unit 11 during the exposure scanning of the original is supplied to the widening circuit 7 and the signal line.
It is input to the video processing unit 12 via 501, subjected to various processes described later in the present unit 12, and sent to the printer unit 2 via the interface circuit 56.

Next, the outline of the color printer 2 will be described. A scanner 711 is 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, octahedron), a motor (not shown) for rotating the mirror 712, and an f / θ lens. (Image forming lens) 713 and the like. 714 is a reflection mirror for changing the optical path of the laser beam, 715
Is a photosensitive drum. The laser light emitted from the laser output unit is reflected by the polygon mirror 712, linearly scans (raster scan) the surface of the photosensitive drum 715 through the lens 713 and the mirror 714, and forms a latent image corresponding to the original image. .

Further, 717 is a primary charger, 718 is a full-face exposure lamp, 723 is a cleaner unit for collecting the untransferred residual toner, 72
4 is a pre-transfer charger, and these members are the photosensitive drum 715.
Is arranged around.

Reference numeral 726 denotes a developing unit that develops the electrostatic latent image formed on the surface of the photosensitive drum 715 by laser exposure.
Y, 731M, 731C, 731Bk are developing sleeves that are in direct contact with the photosensitive drum 715 for direct development, 730Y, 730M, 730C, 730Bk are toner hoppers that hold preliminary toner, and 732 is a screen for transferring developer. , These sleeves 731Y ~ 731B
k, the toner hoppers 730Y to 730Bk, and the screen 732 constitute a developing device unit 726, and these members are arranged around the rotation axis P of the developing device unit. For example, when a yellow toner image is formed, yellow toner development is performed at the position shown in this figure, and when a magenta toner image is formed, the developing unit 726 is rotated about the axis P in the figure to expose the toner. A developing swivel 731M in the magenta developing unit is arranged at a position in contact with the body 715. Development of cyan and black works similarly.

Further, 716 is a transfer drum for transferring the toner image formed on the photosensitive drum 715 to a sheet, 719 is an actuator plate for detecting the moving position of the transfer drum 716, and 720 is to be in close proximity to the actuator plate 719. Is a position sensor for detecting that the transfer drum 716 has moved to the home position, 725 is a transfer drum cleaner, 727 is a paper pressing roller, 728 is a charge eliminator and 729 is a transfer charger, and these members 719, 720, 725, 727, 729 are Transfer roller 716
Is arranged around.

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 and 741 are timing rollers that control the timing of paper feed and conveyance. The sheet that has been fed and conveyed is guided by a sheet guide 749 and wound around a transfer drum 716 while having its leading end supported by a gripper described later, and shifts to an image forming process.

Further, 550 is a drum rotation motor, which synchronously rotates the photosensitive drum 715 and the transfer drum 716. After the image formation process, the 750
A peeling claw that removes the paper from the transfer drum 716, 742 is a conveyor belt that conveys the removed paper, and 743 is a conveyor belt 7.
An image fixing unit that fixes the paper conveyed in 42,
The image fixing unit 743 has a pair of thermal pressure rollers 744 and 745.

First, the control unit 13 of the reader unit according to the present invention will be described with reference to FIG.

(Control Unit) The control unit includes a CPU 22 which is a microcomputer, and controls signal lines 508 for video signal processing control, a lamp driver 21 for exposure and scanning, a stepping motor driver 15, a digitizer 16, and an operation panel 20.
The program ROM 23, RAM 24, RAM 25 are controlled organically in order to obtain a desired copy via the (bus), 504, 503, 505, etc. The RAM 25 is guaranteed to be non-volatile by the battery 31. 505 is a commonly used signal line for serial communication C
The operator inputs from the digitizer 16 according to the protocol between the PU 22 and the digitizer 16. That is, reference numeral 505 is a signal line for inputting coordinates, area instruction, copy mode instruction, magnification change instruction, etc. at the time of editing, for example, moving and combining. Signal line 503
Is the scanning speed, distance,
It is a signal line for instructing forward and backward movements, and the motor driver 15 inputs a predetermined pulse to the stepping motor 14 according to an instruction from the CPU 22 to give a motor rotating operation. The serial I / F 29 and 30 are generally realized by a serial I / F LSI such as Intel 8251. Although not shown, the digitizer 16 and the motor driver 15 also have similar circuits. is doing. An interface protocol between the CPU 22 and the motor driver 15 is shown in FIG.

Further, S1 and S2 are sensors for detecting the position of the original exposure scanning unit (FIG. 11 in FIG. 1), and the home position is S1 and the white level of the image signal is corrected at this position. S2 is a sensor for detecting that there is a document exposure scanning unit at the leading edge of the image, and this position is the reference position of the document.

(Printer interface) Signals ITOP, BD, VCLK, VIDEO, HSYNC, SRCOM in Fig. 2
(511 to 516) are color printer units 2 of FIG. 1, respectively.
And an interface signal between the reader section 1 and the reader section 1.
All the image signals VIDEO514 read by the reader unit 1 are sent to the color printer unit 2 based on the above signals. ITOP
Is a synchronizing signal in the image feeding direction (hereinafter referred to as the sub-scanning direction), which is once for sending one screen, that is, once for sending four color (yellow, magenta, cyan, Bk) images, a total of four. When the paper edge of the transfer paper wound around the transfer drum 716 of the color printer section 2 receives the transfer of the toner image at the contact point with the photosensitive drum 715, the image and position of the front edge of the original document are generated. Transfer drum 716, photosensitive drum 71 to match
In synchronism with the rotation of 5, it is sent to the video processing unit in the reader 1 and is further input as an interrupt of the CPU 22 in the controller 13 (signal 511). The CPU 22 performs image control in the sub-scanning direction for editing etc. based on the ITOP interrupt.
BD512 is once per revolution of polygon mirror 712, that is, 1
It is a synchronization signal in the raster scan direction (hereinafter referred to as the main scanning direction) that occurs once in the raster scan,
The image signal read by the reader unit 1 is sent line by line in the main scanning direction to the printer unit 2 in synchronization with BD. VCLK
Reference numeral 513 is a synchronous clock for sending the 8-bit digital video signal 514 to the color printer unit 2, for example, the fourth clock.
Video data 514 is transmitted via flip-flops 32 and 35 as shown in FIG. HSYNC515 is VCLK from BD signal 512
Created in sync with 513. This is the main scanning direction synchronization signal, has the same cycle as BD, and the VIDEO signal 514 is strictly HSYN.
It is sent in synchronization with C515. This is because the BD signal 515 is generated in synchronization with the rotation of the polygon mirror.
There is a lot of jitter in the motor that rotates the 712, and if it is synchronized with the BD signal as it is, it will cause jitter in the image.
This is because HSYNC515, which is generated based on the BD signal in synchronization with VCLK without jitter, is required. SRCOM is a signal line for half-duplex bidirectional serial communication, and is synchronized with 8-bit serial clock SCLK between synchronization signals CBUSY (command busy) sent from the reader as shown in FIG. 4 (C). Then, the command CM is sent, and the printer section responds to this.
Status ST is returned in synchronization with the 8-bit serial clock during SBUSY (status busy). In this timing chart, the status is "3CH" for the command "8EH".
Is returned, and instructions from the reader unit to the printer unit, such as color mode and cassette selection, and status information of the printer unit, such as jam, no paper, and weight, are all exchanged. This is done via the communication line SRCOM.

In Fig. 4 (a), one full-color image of 4 colors is displayed on ITOP and HS.
The timing chart for sending based on YNC is shown. ITOP5
Reference numeral 11 indicates a yellow image, a magenta image, a cyan image, or Bk image data when the transfer drum 716 is generated once every one rotation or two rotations, and the Bk image data is sent from the reader unit 1 to the printer unit 2 to superimpose four colors. Full-color image is formed on the transfer paper. For example, if the HSYNC is 420 mm in the longitudinal direction and the image density in the feed direction is 16 pel / mm, HSYNC will be sent out 420 × 16 = 6720 times, which is also input to the clock circuit 28 in the controller circuit 13 at the same time. It has been input, this is after a predetermined number of counts,
It is designed to interrupt HINT517 to CPU22. As a result, the CPU 22 performs image control in the feeding direction, for example, control of extraction and movement.

(Video Processing Unit) Next, the video processing unit 12 will be described in detail with reference to FIG. The original must first be exposed to the exposure lamp 10 (see FIGS. 1 and 2).
The reflected light is emitted by the color reading sensor 6 in the scanning unit 11 for color separation for each image and is read by the amplifying circuit 42. Reference numeral 41 is a CCD driver which supplies a pulse signal for driving the color reading sensor, and a necessary pulse source is generated by a system control pulse generator 57. FIG. 6 shows the color reading sensor and the driving pulse. FIG. 6 (a) shows a color reading sensor used in this example, which has a size of 62.5 μm (1 /
16 mm) as one pixel, and 1024 pixels, that is, one pixel is divided into three in the main scanning direction by G, B, and R, so that the total number of effective pixels is 1024 × 3 = 3072. On the other hand, each chip 58-62 is formed on the same ceramic substrate and
The 1,3,5th (58,60,62) are on the same line LA, the 2nd and 4th are
It is arranged on line LB which is separated from LA by 4 lines (62.5 μm × 4 = 250 μm), and scans in the direction of arrow AL when reading a document. Each of the five CCDs is driven independently and synchronously by the drive pulse group ODRV518 at the first, third, fifth positions and EDRV519 at the second and fourth positions. O01 included in ODRV518
E01A, E02A, ERS contained in A, O02A, ORS and EDRV519 are charge transfer clock and charge reset pulse in each sensor respectively, and mutual interference and noise between 1, 3, 5th and 2nd, 4th. Due to the limitation, they are generated in perfect synchronization with each other so that they are not in a jitter. Therefore, these pulses are generated by one reference oscillation source OSC5.
It is generated from 8 '(Fig. 5). Figure 7 (a) shows ODRV51.
8, a circuit block for generating EDRV519, FIG. 7 (b) is a timing chart, which is included in the system control pulse generator 57 in FIG. A clock K0535 which is a division of the original clock OLK0 generated by a single OSC58 '.
Is a reference signal SYNC2, which determines the generation timing of ODRV and EDRV.
This is a clock that generates SYNC3.SYNC2 and SYNC3 determine the output timing according to the preset values of presettable counters 64 and 65 set by the signal line 539 connected to the CPU bus. The devices 66 and 67 and the drive pulse generators 68 and 69 are initialized. In other words, with HSYNC515 input to this block as the reference, all are generated by CLK0 output from one oscillation source OSC and the division clock that is generated in synchronization with each other, so each pulse of ODRV518 and EDRV519 is generated. The group is obtained as a synchronized signal without any jitter, and the signal disturbance due to the interference between the sensors can be prevented.
Here, the sensor drive pulse OD obtained in synchronization with each other
The RV518 is supplied to the 1st, 3rd and 5th sensors, and the EDRV519 is supplied to the 2nd and 4th sensors.The video signals V1 to V5 are independent from each sensor 58, 59, 60, 61, 62 in synchronization with the drive pulse. Output to the fifth
Each channel shown in FIG. 40 is amplified to a predetermined voltage value by an independent amplifier circuit 42, and V1, V3, and V5 are EO at the timing of OOS529 in FIG. 6 (b) through the coaxial cable 501 (FIG. 1).
The V2 and V4 signals are transmitted at the timing of S534 and input to the video processing unit.

The color image signal obtained by reading the document input to the video processing unit 12 by dividing the document into 5 divisions, the sample and hold circuit S / H43, G (green), B (blue), R (red) three colors Is separated into Therefore, after S / H, 3
× 5 = 15 signal processing systems. FIG. 8 (b) shows a timing chart for obtaining the digital data A / Dout which is sampled and held by one channel and is amplified and then input to the A / D conversion circuit 45 and multiplexed. A processing block diagram is shown in FIG.

The analog color image signal read by the above-mentioned 5-chip equal-size color sensor is the 8th color for each 5th channel.
It is input to the analog color signal processing circuit of FIG. Since the circuits A to E corresponding to the respective channels are the same circuit, the circuit A will be described with reference to the waveform timing of FIG. The analog color signals that are input are in the order of G → B → R as shown in FIG. 8 (b) SiGA, and the sample hold pulse (S / H) 250 is used for each color parallel with the sample hold pulse SHG535, SHB536, SHR537. Convert to. FIG. 8 (b) VDG1, VDB1, VDR1 (538 to 540) The signals 538 to 540 separated by color are adjusted by the amplifiers 251 to 253 after offset (O characteristic in FIG. 8 (C)). , Low-pass filter (LPF) 254 to 256 cut the band other than the signal component, and then amplifiers 257 to 259 perform gain adjustment (Fig. 8 (C) G characteristics) and then pulse to multiplex into one signal again. GSEL, BSEL, RSEL (544 to 546) makes one system in MPX260, A / D converted and converted to digital value (ADOUT547). In this configuration, since the MPX260 multiplexes and then performs A / D conversion, color signals of 15 channels in total of three channels for each of G, B, and R are performed by five A / D converters. The same applies to the B to E circuits.

Next, in this embodiment, as described above, four lines (62.5 μm ×
4 = 250 μm) in the sub-scanning direction, and since the original is read by five staggered sensors divided into five areas in the main scanning direction, the preceding scanning is performed as shown in FIG. The reading positions of the channels 2, 4 and the remaining 1, 3, 5 are misaligned. Therefore, in order to connect this correctly, a memory for a plurality of lines is used. Fig. 9 (b)
Shows a memory configuration of the present embodiment, and 70 to 74 are memories each storing a plurality of lines and have a FiFo configuration. That is, 70, 72, 74 have a capacity of 5 lines with 1 line of 1024 pixels, and 71, 73 have a capacity of 15 lines.
Data is written line by line from the points indicated by PO75 and WPE76, and when writing for one line is completed, WPO or WPE is incremented by one. WPO75 is channel 1,3,5
, WPE76 is common to 2,4.

OWRST540, EWRST541 are line pointers WPO75, W respectively
This signal initializes the PE76 value and returns it to the beginning.
ERST543 is a signal for returning the value of the read pointer (pointer at the time of reading) to the beginning. Now, channel 1 and 2 will be described as an example. As shown in FIG. 9 (a), the channel 2 precedes the channel 1 by 4 lines, so that the channel 2 reads the same line, for example, the line Fi.
After writing to the Fo memory 71, the channel 1 reads the line 4 lines later. Therefore, if you advance WPE by 4 from the memory write pointer WPO, FiFo
If the same read point value is read from the memory, the same line is read in channels 1, 3, 5 and channels 2, 4 and the deviation in the sub-scanning direction is corrected. For example, in FIG. 9 (b), the channel 1 has WPO, and the first line 1 of the memory has WPO. At the same time, channel 2 has
WPE points to the 5th line from the top. If you start from this point, when WPO shows 5, WPE points to 9, and the line on the document is written in the area where the pointer is 5, and after that, both RPO and RPE (read pointer) are advanced in the same way, and the cyclic Just read it to.
FIG. 9C is a timing chart for performing the above-mentioned control, and image data is sent line by line in synchronization with HSYNC515. EWRST541, OWRST540 are 4 as shown
It is generated with a line shift, and the ORST 542 is generated by the capacity of the FiFo memory 70, 72, 74, so every 5 lines the ERST 543 is generated every 15 lines for the same reason. On the other hand, at the time of reading, first one line is read at a speed five times faster than channel 1, then one line is similarly read from channel 2, then 3 channels, 4 channels, 5 channels are read in sequence, and channels 1 to 5 are read during 1 HSYNC. You can get the connected signal of. FIG. 9 (d) 1RD to 5RD (544 to 548) show the effective section signals of the read operation of each channel.
The control signal for controlling the image connection between the channels using the present FiFo memory is generated by the memory control circuit 57 'shown in FIG. The circuit 57 'is composed of a discrete circuit such as TTL, but since it is not the gist of the present invention, its explanation is omitted. Also, the memory is the blue component of the image,
Although it has three colors, that is, a green component and a red component, the explanation is limited to only one of them because they have the same constitution.

FIG. 10 (a) shows a black correction circuit. As shown in FIG. 10 (b), the black level outputs of channels 1 to 5 have large variations between chips and between pixels when the amount of light input to the sensor is very small.
If this is output as it is and the image is output, streaks and unevenness occur in the data portion of the image. Therefore, it is necessary to correct the output variation of the black portion, and the circuit shown in FIG. 10 (a) is used for the correction. Prior to the copying operation, the original scanning unit is moved to the position of the black plate having a uniform density arranged in the non-image area of the front end of the original table, the halogen is turned on and the black level image signal is input to this circuit. In order to store one line of this image data in the black level RAM 78, the selector 82 selects A (), the gate 80 is closed (), and 81 is opened. That is,
The data line is connected to 551 → 552 → 553, while the output of the address counter 84 initialized by ▲ ▼ is output to the address input of the RAM, and the black level signal for one line is stored in the RAM78. Stored inside (above black reference value capture mode). At the time of reading an image, the RAM 78 is in a data read mode, and is read and inputted to the B input of the subtractor 79 line by line and pixel by line through the data line 553 → 557. That is, at this time, the gate 81 is closed () and the gate 80 is opened (). Therefore, the black correction circuit output 556 is the black level data D
For K (i), for example, in the case of a blue signal, Bin (i) -DK
(I) = Bout (i) (black correction mode).
Similarly, the green Gin and the red Rin are similarly controlled by 77G and 77R. The control lines of each selector gate for this control are controlled by the CPU by the latch 85 assigned as the CPU (FIG. 22) I / O.

Next, white level correction (shading correction) will be described with reference to FIG. White level correction is based on the white data when the original scanning unit is moved to a uniform white plate position and irradiated.
Corrects variations in sensitivity of the illumination system, optical system, and sensor.
The basic circuit configuration is shown in FIG. 11 (a). The basic circuit configuration is the same as that in Fig. 10 (a), but the subtractor is used for black correction.
In the white correction, the multiplier 7
Since only 9'is used, the description of the same parts will be omitted. At the time of color correction, first, when the original scanning unit is at the position of the uniform white plate (home position), that is, before the copying operation or the reading operation, the exposure lamp is turned on and the image data of the uniform white level is corrected for one line. Store in RAM78 '. For example, if it has a width in the longitudinal direction A4 in the main scanning direction, 16 pels / mm, 16 × 297 mm = 4752 pixels, that is, at least the RAM capacity is 4752 bytes. As shown in FIG. Assuming that the plate data Wi (i = 1 to 4752), the RAM 78 'stores the data for the white plate for each pixel as shown in FIG. 11 (C). On the other hand, for Wi, the data after correction for the read value Di of the i-th pixel normal image
It should be Do = Di × FFH / Wi. Therefore, from the CPU in the controller (Fig. 22), the latches 85 ″, ′,
The gate 80 'is closed for ′ and ′, 81 ′ is opened, and the selector 82 ′ and 83 ′ output so that B is selected.
Make 78 'CPU accessible. Next, F for the first pixel Wo
FH / Wo, W ₁ is sequentially calculated as FF / W ₁ ... to replace the data. When the blue component of the color component image is finished (11th
(D) StepB) Similarly to the green component (StepG) and the red component (StepR), the original image data Di input after that
, The gate 80 'is opened ('), 81 'is closed (') so that Do = Di × FFH / Wi is output, A is selected by the selector 83 ', and the coefficient read from the RAM 78'. The data FFH / Wi passes through the signal line 553 → 557, is multiplied by the original image data 551 input from one side, and is output.

With the above configuration and operation, the speed is increased and the correction can be performed for each pixel.

Further, in this configuration, since image data for one line can be input at high speed and the RD and WR can be accessed by the CPU 22, the coordinates (xmm, xmm, ymm) to detect the component of the image data at the point P, move the scanning unit (16 × x) line in the x direction, and move this line by the same operation as described above.
The component ratio of B, G, R can be detected by reading the data of the (16 × y) th pixel in M78 '(hereinafter, this operation is called "line data fetching mode"). Further, those skilled in the art can easily infer that an average density histogram (hereinafter referred to as “average value calculation mode”) density histogram (hereinafter referred to as “histogram mode”) can be easily obtained by this configuration. .

As described above, the black level and the white level are corrected based on various factors such as the black level sensitivity of the image input system, the dark current variation, the variation between the sensors, the optical system light amount variation and the white level sensitivity, and the correction is performed over the main scanning direction. The uniformed color image data proportional to the input light amount is matched with the human eye's spectral luminous efficiency characteristics, and the logarithmic conversion circuit 86 (Fig. 5) is used.
Entered in. Here, an image source that is converted to have white = 00H and black = FFH and is further input to the image reading sensor, for example, a normal reflective original, a transparent original such as a film projector, or a negative original even with the same transparent original,
Since the sensitivity of the positive film or film and the gamma characteristic input in the exposure state are different, Fig. 13 (a),
As shown in (b), a plurality of LUTs (lookup tables) for logarithmic conversion are provided and used properly according to the application.
Switching is performed by the signal lines lg0, lg1, lg2 (560 to 562) and is performed as an I / O port of the CPU (22) by inputting an instruction from the operation unit or the like. Here, the data output for each of B, G, and R corresponds to the density value of the output image.
The output for (blue) corresponds to the amount of yellow toner, the amount of magenta toner for G (green), and the amount of cyan toner for R (red). Corresponds to M and C.

The following color correction is performed on each color component image data from the original image obtained by logarithmic conversion, that is, the yellow component, the magenta component, and the cyan component. As shown in Fig. 14, the spectral characteristics of the color separation filter arranged for each pixel in the color reading sensor has an unnecessary transmission area such as a shaded area, while the color toner transferred to the transfer paper. It is well known that (Y, M, C) also has unnecessary absorption components as shown in FIG. Therefore, each color component image data Yi, Mi, Ci
As opposed to Masking correction for calculating a linear expression of each color and performing color correction is well known. Furthermore, by Yi, Mi, Ci, Min (Yi, M
i, Ci) (minimum value of Yi, Mi, Ci) is calculated, and this is used as a black (black), and black toner is added later (smiking), and according to the black component added, Undercolor removal (UCR) operations that reduce the amount added are also common. Figure 16 (a)
Figure 2 shows the circuit configuration of masking, summing, and UCR. The feature of this configuration is that there are two masking matrix systems, and there is a UCR that can be switched at high speed with "1/0" of one signal line. One signal line is "1/0" with or without UCR. Therefore, there are two circuits that determine the amount of Sumi that can be switched at high speed, and it is possible to switch at high speed at "1/0". First, prior to image reading, a desired first matrix coefficient M ₁ and a desired second matrix count M ₂ are set in the CPU 22.
Set from the bus connected to. In this example However, M ₁ is set in registers 87 to 95, and M ₂ is set in 96 to 104. Further, 111 to 122, 135 and 131 are selectors, respectively, which select A when the S terminal = “1” and select B when the S terminal = “0”. Therefore, when selecting the matrix M ₁ , the switching signal MA
Set REA564 to “1” and set to “0” when matrix M ₂ is selected. Further, 123 is a selector, which selects signals C ₀ , C ₁ (566,
567) output a, b, c based on the truth table in Fig. 16 (b).
Is obtained. The selection signals C ₀ , C ₁ and C ₂ correspond to the color signals to be output, for example, in the order of Y, M, C, Bk (C ₂ , C ₁ , C ₀ ) =
(0,0,0), (0,0,1), (0,1,0), (1,0,0), and (0,1,1) as a monochrome signal sets the desired color. Obtain the corrected color signal. Now (C ₀ , C ₁ , C ₂ ) ＝ (0,0,
0) and MAREA = "1", the contents of registers 87, 88 and 89, and accordingly (a _Y1 , -b _M1 , -C _C1 ) are output to the output (a, b, c) of the selector 123. To be done. On the other hand, the input signal Yi,
The black component signal 574 calculated from Mi, Ci as Min (Yi, Mi, Ci) = k is subjected to a linear transformation of Y = ax−b (a and b are constants) at 134 (passes the selector 135). Subtractor 124,125,126
Is input to the B input of. In each of the subtractors 124 to 126, Y = Yi− (ak−b), M = Mi− (ak−b), C = Ci as undercolor removal.
-(Ak-b) is calculated and input to the multipliers 127, 128, 129 for masking calculation via the signal lines 577, 578, 579. Selector 135 is controlled by signal UAREA565, U
AREA565 has a configuration that can switch UCR (under color removal), with / without, at high speed by "1/0". Multiplier 127,
128 and 129 have (a _Y1 , -b _M1 ,-
C _C1 ), B input to the above-mentioned [Yi- (ak-b), Mi- (ak
-B), Ci- (ak-b)] = [Yi, Mi, Ci] is input, as is apparent from the figure, the output Dout is Yout under the condition of C ₂ = 0 (YorMorC selection). = Yi x (a _Y1 ) + Mi x (-b
_M1 ) + Ci × (−C _C1 ) is obtained, and yellow image data subjected to masking color correction and undercolor removal processing is obtained. Similarly, Mout = Yi x (-a _Y2 ) + Mi x (b _M2 ) + Ci x (-C _C2 ) Cout = Yi x (-a _Y3 ) + Mi x (-b _M3 ) + Ci x (C _C3 ) becomes Dout Is output. As described above, the color selection is controlled by the CPU 22 according to the development order of the color printer (Co, C ₁ , C ₂ ) according to the table of FIG. 16 (b). Register 1
05 to 107 and 108 to 110 are monochrome image forming registers, which operate on the same principle as the masking color correction described above.
It is obtained by weighted addition for each color by _{NO = k 1 Yi + l 1} Mi + m 1 Ci. Switching signal MAREA564, UAREA565, KAREA587
Is the coefficient matrix M ₁ for masking color correction as described above.
And M ₂ high-speed switching, UAREA565 is high-speed switching with and without UCR, KAREA587 is the primary conversion switching of black component signal (output to Dout through signal line 569 → selector 131), that is, K = Min ( Yi, Mi, Ci) is a signal that switches the characteristics of Y = ck-d or Y = ek-f (c, d, e, f are constant parameters) at high speed. The masking coefficient can be changed, and the amount of UCR or the amount of smear can be switched for each area. Therefore, this is a configuration that can be applied when an image obtained from an image input source having different color separation characteristics, a plurality of images having different black tones, and the like are combined as in this embodiment.
These are area signals MAREA, UAREA, KAREA (564,565,58
7) is generated by the area generation circuit (FIG. 51 in FIG. 2) described later.

Fig. 17 shows the area signal generation (MAREA564, UAREA565, KA
(REA587 etc.) is a diagram for explaining. The area refers to, for example, a shaded area in FIG. 17 (e), which is line-by-line in the sub-scanning direction A → B like the timing chart AREA in FIG. 17 (e). It is distinguished from other areas by a different signal. Each area is designated by the digitizer 16 in FIG. 17th
FIGS. 10A to 10D show a configuration in which the generation position, the section length, and the number of sections of the area signal can be programmable by the CPU 22 and a large number can be obtained. In this configuration, 1
The area signal of the book is generated by one bit of the RAM accessible by the CPU. For example, in order to obtain the area signals AREA0 to AREAn of the n areas, the RAM has two n-bit RAMs. (Fig. 17 (d) 136, 137). Now, the area signal AR as shown in Fig. 17 (b)
EA0, and when the get AREAn, making a "1" in bit 0 of the address of the RAM x _1, x _3, to all bit 0 of the rest of the address "0". On the other hand, “1” is assigned to the RAM address 1, x ₁ , x ₂ , x _4.
The bits n of other addresses are all set to "0".
When the RAM data is read out sequentially sequentially in synchronization with a fixed clock with HSYNC as the reference, for example,
As shown in FIG. 17 (c), the data "1" is read at the points of the addresses x ₁ and x ₃ . The read data is the J, K flip-flop J, 148-0 to 148-n J, K of FIG.
Since it is in both K terminals, the output toggles, that is, RAM
When “1” is read and CLK is input, output “0” →
It changes from "1", "1" to "0", and a zone signal like AREA0, and accordingly a region signal is generated. If data = "0" across all addresses, no area section is generated and no area is set. FIG. 17 (d) shows this circuit configuration.
6,137 is the RAM described above. In order to switch the area section at high speed, for example, while reading data from RAMA136 for each line, RAMB137
The memory write operation for setting different areas is performed from 22 (Fig. 2), and the section generation and the memory write from the CPU are switched alternately. Therefore, when the shaded area in Fig. 17 (f) is specified, RA is displayed as A → B → A → B → A.
MA and RAMB are switched, and if (C ₃ , C ₄ , C ₅ ) = (0,1,0) in FIG. 17 (d), the counter output counted by VCLK is used as an address. Selector 139
Is given to the RAMA136 through (Aa), and the gate 142 is opened and the gate 144 is closed and read from the RAMA136.
The n bits are input to the JK flip-flops 148-0 to 148-n and the section signals AREA0 to AREAn are generated according to the set value. Writing from the CPU to B is performed by the address bus A-Bus, the data bus D-Bus, and the access signal / during this period. Conversely, when generating a section signal based on the data set in RAMB137 (C ₃ , C ₄ , C ₅ ) =
By setting (1,0,1), the same operation can be performed and RAMA13 from the CPU
Data can be written to 6. (These two RAMs will be referred to as A-RAM and B-RAM, and C ₃ , C ₄ , and C ₅ will be referred to as AREA control signals (AR
CNT) ... C ₃ , C ₄ , C ₅ are output from the CPU I / O port). FIG. 17 (g) shows a correspondence table of each bit and signal name.

Next, a circuit configuration for color conversion is shown according to FIG. The color conversion here is to replace each color component data (Yi, Mi, Ci) input to this circuit with another color when it has a certain specific color density or when it has a color component ratio. Say a thing. For example, red (shaded area) of the original in Figure 18 (c)
Say that only the part of is changed to blue. First, each color data (Yi, Mi, Ci) input to this circuit is averaged by the averaging circuits 149, 150, 15
When 1 is used, the average is taken in units of 8 pixels, and one is added by the adder 155 (Yi
+ Mi + Ci) is calculated and input to the B inputs of the dividers 152, 153 and 154, and the other to the A input respectively.
/ Yi + Mi + Ci and cyan ratio rac = Ci / Yi + Mi + Ci are obtained as signal lines 604, 605 and 606, respectively, and input to the window comparators 156 to 158. Here, the comparison upper limit value and lower limit value of each color component set from the CPU bus, so that the ratio is included between (yu, mu, cu) and (yl, ml, cl), that is, yl When ≦ ray <yu, output = “1”, ml ≦ ram
When ≦ mu, the output is “1”, when cl ≦ rac ≦ cu, the output is “1”, and when the above three conditions are met, the input color is judged to be the desired color, and the 3-input AND165 The output becomes 1 and is input to the S ₀ input of the selector 175. The adder 155 is the CPU 22 I
Output when signal line CHGCNT607 output from / O port is "1" When “0”, the output 603 = 1 is output. Therefore, when the output is "0", the outputs of the dividers 152, 153 and 154 are the same as the A input. That is, at this time, not the desired color component ratio but the color density data is set in the registers 159 to 164.
175 is a selector of four inputs and one output, and the desired color data after conversion is input to the inputs 1, 2 and 3 respectively for the Y component,
While the M component and the C component are input, the data Vin to which the masking color correction and UCR are applied to the read original image is input to 4 and is connected to Dout in FIG. 16 (a). The switching input S ₀ is “1” when color detection is “true”, that is, “1” when a predetermined color is detected, and “0” at other times, and S ₁ is the first
Area signal CHAREA generated by the area generation circuit in Fig. 17 (d)
At 615, it becomes "1" in the specified area and "0" outside the specified area. When it is "1", color conversion is performed, and when it is "0", it is not performed. S ₂ , S ₃ Input C
₀ , C ₁ (616,617) is the same as the C ₀ , C ₁ signal of FIG. 16 (a), and (C ₀ , C ₁ ) = (0,0), (0,1), (1, At the time of 0), the yellow image formation, the magenta image formation, and the cyan image formation are performed by the color printer, respectively. The truth table of the selector 175 is shown in FIG. 18 (b). Registers 166 to 168 store the desired color component ratio after conversion or color component density data in CP.
Set from U. If y ', m', c 'are color component ratios, CHG
Since CNT607 is set to “1”, the output 603 of the adder 155 becomes (Yi + Mi + Ci) and is input to the B inputs of the multipliers 169 to 171. Therefore, the selector inputs 1, 2 and 3 have (Yi + Mi + Ci) Xy ′, (Yi + Mi + Ci) × m ′, (Yi + Mi + Ci) × c ′ are input, and color conversion is performed according to the truth table FIG. 18 (b). On the other hand, when y ′, m ′, c ′ are color component density data,
CHGCNT = "0" and signal 603 = "1", therefore multiplier 1
The outputs of 69 to 171 and therefore the inputs 1, 2 and 3 of the selector 175 are
The data (y ', m', c ') is input as it is, and color conversion is performed by replacing the color component density data. Area signal
In CHAREA ° 615, the section length and number can be set arbitrarily as described above, so as shown in Fig. 18 (d), this color conversion can be applied only to a plurality of areas r ₁ , r ₂ , r _3. , by Figure 18: (a) providing a plurality circuits, for example in the region r ₁ red → blue, the r ₂ red → yellow, r ₃ in the plurality of regions, such as that white → red color over multiple colors Conversion is also possible in high speed and in real time. This is provided with a plurality of color detection → conversion circuits that are the same as the circuits described above, and the output of each circuit A, B,
Data required from C and D is selected by CHSEL0 and CHSEL1,
It is output to output 619. Area signals adapted to the respective circuits are generated by the area generation circuit 51 as well as CHAREA0 to 3 and CHSEL0, 1 as shown in FIG. 17 (d).

FIG. 19 is a gamma conversion circuit for controlling the color balance and color density of the output image in this system,
Basically, it is data conversion by LUT (lookup table), and LU is associated with the input designation from the operation unit.
The data of T is rewritten. When writing data to the RAM177 for LUT, by setting the selection signal line RAMSL623 = "0", the B input is selected by the selector 176 and the gate 178 is closed, 1
79 is opened and the buses ABUS and DBUS (address data) from the CPU 22 are connected to the RAM 177 to write or read data. RA after the Ichiban conversion table is created
MSL623 = "1", video input from Din620 is RAM177
Of the video data, and the desired data is output from the RAM and input to the scaling control circuit of the next stage through the opened gate 178. There are at least two types of gamma RAM, yellow, magenta, cyan, black, and MONO (at least two types (Fig. 19 (b) A
And B) have, and switching by color is the same as in Fig. 16.
C ₀ , C ₁ , C ₂ (566,567,568) and by the GARA626 generated by the area generation circuit FIG. 17, for example,
As shown in FIG. 19- (c), the area A has a gamma characteristic of A and the area B has a gamma characteristic of B so that a single print can be obtained.

This gamma RAM has 2 types of A, B variable magnification characteristics, so that it is possible to switch at high speed in each area, but it is possible to switch more characteristics at high speed by adding this. The Dout 625 of FIG. 19 (a) is input to the input Din 626 of the scaling control circuit of the next stage FIG. 20 (a).

Also, as is clear from the figure, this gamma conversion RAM is designed so that the characteristics can be switched individually for each color, and it can be associated with the operation from the liquid crystal touch panel key on the operation panel.
It is rewritten from CPU22. For example, when the operator touches the density adjustment key e or f on P000 (standard screen) in FIG. 33, when touching e from the center 0, FIG. 19 (d)
As in (e), the setting moves from -1 to -2 to the left, and the characteristics in the RAM 177 are also selected and rewritten as -1 to -2 to -3 to -4. Conversely, when f is touched, the characteristics are + 1 → + 2 → + 3 →
It is selected as +4 and RAM177 is rewritten in the same way. That is, by touching the e or f key on the standard screen, all tables of Y, M, C, Bk or MONO (RAM177) are rewritten, and the density can be adjusted without changing the color tone. . On the other hand, in the screen of P420 in Fig. 37 (color balance adjustment in <color create> mode), RAM177 is individually adjusted for Y, M, C and Bk in order to adjust the color balance.
Rewrite only the inner area. That is, for example, pressing the case intra P420 Tatsuchiki y ₁ of changing the color tone of the yellow component, the black strip display extends upwardly, conversion characteristics Fig. 19 (f) -Y
As described above, the y ₁ direction, and hence the yellow component, becomes darker. When the touch key y ₂ is touched, the characteristics are selected in the y ₂ direction, and the yellow component becomes lighter. That is, in this operation, the density is changed only for the single color component, and the color tone is changed. The same applies to M, C and Bk.

FIG. 20 (a) 180 and 181 are 16 × 297 = 475 each in the main scanning direction for one line, for example, 16 pel / mm, A4 longitudinal width 297 mm.
This is a FiFo memory with a capacity of 2 pixels, and as shown in FIG. 20 (b), write operation to the memory during ▲ ▼, ▲ ▼ = “Lo”, read section during ▲ ▼, ▲ ▼ = “Lo” When the operation is performed, the output of A when ▲ ▼ = "Hi" and the output of B when ▲ ▼ = "Hi" are in a high impedance state.
Is output and output as Dout627. FiFoA, FiFoB180,
181 is a write address counter that operates with WCK and RCK (clock) inside, respectively.
As shown in Figure (c), the internal pointer advances, so as is generally done, give WCK a CLK that is the video data transfer clock VCLK588 in the system thinned by rate multiplier 630, and RCK. It is well known that when CLK that does not thin VCLK588 is applied, the input data to this circuit is reduced at the time of output, and when it is applied the opposite, it is expanded, and FiFoA and B alternately perform their read and write operations. . Furthermore, W address counter 18 in FiFo memory 180,181
2, R address counter 183 has enable signals (WE, RE ... 6
35,636) is enabled by the clock only during the "Lo" interval and is initialized by RST (634) = "Lo". For example, as shown in Fig. 20 (d),
RST (In this configuration, the synchronization signal in the main scanning direction ▲ ▼
Is used), then only m pixels from the n _1st pixel ▲
▼ ＝ “Lo” (same for ▲ ▼), write pixel data, and only m pixels from n _2nd pixel ▲ ▼ =
When pixel data is read out with "Lo" (same for ▲ ▼), it moves like ERITE data → READ data in the figure.
That is, ▲ ▼ (and ▲ ▼), ▲
By changing the occurrence position and section of ▼ (and ▲ ▼), the image can be arbitrarily moved in the main scanning direction as shown in Fig. 20 (e), (f) and (g), and the WCK or RCK By combining with thinning, it is possible to easily control the scaling and movement. Input to this circuit ▲ ▼, ▲
▼, ▲ ▼, ▲ ▼ are generated as described above by the area generation circuit FIG. 17 (d).

In FIG. 20, zoom control is performed in the main scanning direction as necessary, and then edge enhancement and smoothing processing are performed in FIG. FIG. 21 (a) is a block diagram of this circuit. The memories 185 to 189 each have a capacity of one line in the main scanning direction, and a total of five lines are sequentially stored in the cycle and output in parallel at the same time in a FiFo configuration. have. 190
Is a commonly used second-order differential space filter, an edge component is detected, and the output 646 is multiplied by the gain of the characteristic shown in FIG. The shaded area in FIG. 21 (b) is the smallest of the components output by edge enhancement,
That is, it is clamped to 0 to remove the noise component. On the other hand, the buffer memory outputs for 5 lines are input to the smoothing circuits 191 to 195, and are averaged in pixel block units of the five sizes shown in the figure up to 1 × 1 to 5 × 5. A desired smoothed signal of 645 is selected by the selector 197. SMSL signal 651 is CPU22
It is output from the I / O port of and is controlled in association with the designation from the operation panel as described later. Further, 198 is a divider, for example, when 3 × 5 smoothing is selected, CP
When “15” is set by U22 and 3 × 7 smoothing is selected, “21” is set by CPU22 and averaged.

The gain circuit 196 has a look-up table (LUT) configuration, and the CP circuit is the same as the gamma circuit FIG. 19 (a) described above.
RAM to which data is written by U22, input EAREA6
When 52 is set to "Lo", the output becomes "0". Furthermore, this edge enhancement control and smoothing control correspond to the LCD touch panel screen on the operation panel.
On the screen in Figure (d) (P430 in Figure 2-7), <Sheepness>
As it is operated by the operator 1, 2, 3, 4 in the strong direction,
The conversion characteristic of the gain circuit is as shown in FIG.
Rewritten by. On the other hand, when the operator operates 1 ', 2', 3 ', 4'in the direction of <sheepness> weak, the switching signal SMSL652 of the selector 197 causes the smoothing block size to be 3x3, 3x5, It is selected to be as large as 3 × 7 and 5 × 5. At the center point C, 1 × 1 is selected, the gain circuit input EAREA651 = “Lo”, the input Din is neither smoothed nor edge enhanced, and is output as Dout at the output of the adder 199. In this configuration, for example, moire that occurs on a halftone original is improved by smoothing, and edge enhancement is performed on the character and line drawing portions, but the sharpness is improved. When the dot original and the character line drawing are in the same original, for example, smoothing is applied to improve moire and the character part is blurred, and the edge of the edge is emphasized. EAREA651 generated in Figure (d)
And by controlling SMSL652, for example with SMSL652 3 ×
Select smoothing 5 and EAREA6 as shown in Fig. 21 (e).
When 51 is generated as A ', B'and applied to the original of dot + character, moire is improved for the dot image and sharpness is improved for the character area. Signal TMAR
EA660 is generated by the area generation circuit 51 like EAREA651,
Output when MAREA = "1" Dout = "A + B", TMAREA = "0"
Dout = "0". Therefore, when a signal such as that shown in FIG. 21 (f) 660-1 is generated by the control of TMAREA660,
Extraction of the shaded area (inside the rectangle), Fig. 21 (g) 660-2
When such a signal is generated, the shaded portion (outside the rectangle) is extracted (white).

FIG. 5 shows a document coordinate recognition circuit 200 for recognizing the coordinates of the four corners of the document placed on the document table.
U22 reads the coordinate data from the register. JP-A-5
Detailed description is omitted because it is disclosed in detail in Japanese Patent Publication No. 9-74774. However, in the spare scan for recognizing the position of this document,
After the black correction and white correction shown in Fig. 10 and Fig. 11 (a),
The masking calculation coefficients shown in FIG. 16A are k ₁ , l ₁ ,
Select m ₁ for monochrome image data generation and select C ₀ , C ₁ , C ₂
Is (0,1,1), and does not perform UCR (under color removal) UAREA5
By setting 65 = “Lo”, monochrome image data is input to the document position recognition unit 200.

FIG. 22 shows an operation panel section according to the present invention, particularly a control section of a liquid crystal screen and a key matrix. Fig. 5 CPU bus 508
This operation panel is controlled by a command given to the liquid crystal controller 201 shown in FIG. 22 and an I / O port 206 for controlling the key matrix 209 for key input and touch key input. The fonts to be displayed on the liquid crystal screen are stored in the FONT ROM 205 and are transferred to the refreshing RAM 204 at every moment by the program from the CPU 22. The liquid crystal controller sends screen data for display to the liquid crystal display 203 via the liquid crystal driver 202 to display a desired screen. On the other hand, all the key inputs are controlled by the I / O port 206, and the key pressed by the generally-used key scan is detected and input to the I / O port → CPU 22 through the receiver 208.

Fig. 23 shows this system (Fig. 1).
The configuration when the 211 is mounted and connected is shown. The same reference numerals as those in FIG. 1 are the same components, and a reflection mirror is placed on the document table 4.
A mirror unit composed of 218, Fresnel lens 212, and diffusion plate 213 is placed, and the transmitted light image of the film 216 projected from the film projector 211 is scanned in the direction of the arrow by the original scanning unit described above while the original projection is performed. Read the same as the original. The film 216 is fixed by a film holder 215, and the lamp 212 is a lamp controller 212.
PJON655, PJCN from the I / O port of CPU22 (Fig. 2) in the controller 13 to control ON / OFF and lighting voltage.
T657 is output. The lamp controller 212 determines the lamp lighting voltage as shown in FIG. 24 by the value of the 8-bit input PJCNT657, and is normally controlled between Vmin and Vmax. At this time, the input digital data is D _{A to} D _B. 25th
The image is read from the film projector in Figure (a),
FIG. 25 (b) shows an outline of the timing chart for the operation flow for copying. At S1, the operator sets the film 216 to the film projector 211, determines the lamp lighting voltage Vexp by the shading correction (S2), AE (S3) described below according to the operation procedure from the operation panel described later, and starts the printer 2. Yes (S4). Prior to the ITOP (image leading edge synchronization signal) signal from the printer, PJCNT = Dexp (corresponding to the proper exposure voltage), and the amount of light is stable during image formation. A Y image is formed by the ITOP signal, and is darkly lit by D _A (corresponding to the minimum exposure voltage) until the next exposure to prevent deterioration of filament due to the rush current when the lamp is lit to extend the life. . After that, similarly, M image formation,
After C image formation and black image formation (S7 to S12), PJCNT =
Turn off the lamp as "00".

Next, according to FIGS. 29 (a) and 29 (b), a processing procedure of AE and shading correction in the projector mode is shown. When the operator selects the projector mode from the operation panel, the operator first selects whether the film to be used is a color negative film, or a color positive, a black and white negative, or a black and white positive. In the case of a color negative, set the film carrier 1 with a cyan color correction filter set in the projector, set the unexposed part of the film to be used (film base) in the film holder, and then set the film ASA sensitivity. Is 100 or more and less than 400, or is 400 or more and presses the shielding start button, the projector lamp lights at the reference lighting voltage V ₁ . Here, the cyan filter cuts the orange base portion of the color negative film, and adjusts the color balance of the color sensor to which the R, G, B filters are attached. Further, by extracting the shading data from the unexposed portion, the dynamic range can be widened even in the case of a negative film. If it is not a color negative film, set the film carrier 2 with the ND filter embedded (or no filter) and press the shade start key on the LCD touch panel to turn on the standard lighting voltage V _{2 of the} projector lamp.
Lights up. Actually, if the operator selects the negative film or the positive film, the reference lighting voltages V ₁ and V ₂ may be automatically switched by recognizing the type of the film carrier. Next, the scanner unit moves to the vicinity of the center of the image projection unit, and the CCD 1 line or the average value of a plurality of lines is taken into the RAM 78 'of FIG. 11 (a) as the shading data for each of R, G, B. Turn off the projector lamp.

Next, set the image film 216 to be actually copied to 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 again by pressing the lamp on button.

When the copy button is turned on, the projector lamp is switched to V ₁ or V ₂ depending on the selection result as to whether the color negative or not.
Is automatically turned on, and the image is projected by Prisskyyan (AE).
Is done. Pre-scanning is for determining the exposure level of the film to be copied at the time of shooting, and is performed by the following procedure. That is, by inputting R signals of a predetermined plurality of lines in the image projection area by CCD, and accumulating the appearance frequency of the R signal pairs, a histogram as shown in Fig. 25 (c) is created (Fig. 11 "Histogram Creation mode ”).
The max value shown in the figure is obtained from this histogram, and 1 / of the max value is calculated.
Determine the maximum and minimum R signal values Rmax and Rmin across which the histogram crosses 16 levels. Then, the lamp light amount multiple α is calculated according to the film type initially selected by the operator. The value of α is α for color or black and white positive film
= 255 / Rmax, α = C ₁ / Rmin for black and white negative, α = C ₂ / Rmin for color negative with ASA sensitivity less than 400, α = C ₃ / Rmin for color negative with ASA sensitivity of 400 or more. C ₁ , C ₂ , C
₃ is a value determined in advance by the gamma characteristic of the film, which is a value of 40 to 50 out of 255 levels.
The α value is converted into output data to the variable voltage power source of the projector lamp by a predetermined lookup table. Next, the projector lamp is lit by the lamp lighting voltage V thus obtained, and the logarithmic conversion table 3 (a) and the masking coefficient 16 (a) are set to appropriate values according to the film type. It is set and the normal copying operation is executed. As shown in FIG. 3 (a), the selection of the logarithmic conversion table is made such that eight kinds of tables of 1 to 8 are selected by the switching signal of 3 bits, 1 for the reflection original, 2 for the color positive, and 3 for the color positive. Use for black and white positive, 4 for color negative (less than ASA400), 5 for color negative (ASA400 and above), 6 for black and white negative, and so on. The contents can be set independently for each of R, G, and B. FIG. 13 (b) shows an example of table contents.

With the above, the copying operation is completed. When transferring to the next film copy, film layer properties (negative / positive, color / black and white et
The operator determines whether or not c) changes, and if it changes, the process returns to FIG. 29 (a), and if it does not change, the process returns to and repeats the same operation.

From the above, the negative film,
Print output corresponding to each of positive, color, and black-and-white films can be obtained. With this system, as can be seen in Fig. 23, the film image is enlarged and projected on the original table surface.
There are few fine character line drawings, and it is necessary to reproduce particularly smooth gradation from the viewpoint of film applications. Therefore, in this system, the gradation processing on the color LBP output side as shown below is different from that when printing from a reflection original.
This is performed by the PWM circuit (778) included in the printer controller 700.

The details of the PWM circuit 778 will be described below.

A block diagram of the PWM circuit is shown in FIG. 26 (A), and a timing diagram is shown in FIG. 26 (B).

The input VIDEO DATA 800 is VCLK801 in the latch circuit 900.
It is latched at the rising edge of and is synchronized with the clock. (Refer to (B) Fig. 800, 801) V output from the latch
The gradation of the IDEO DATA 815 is corrected by the LUT (lookup table) 901 composed of ROM or RAM, and the D / A (digital / analog) converter 902 performs D / A conversion to convert one analog video signal. The generated analog signal is input to the comparators 910 and 911 at the next stage and compared with a triangular wave described later. Signals 808 and 809 input to the other side of the comparator are triangular waves (808B, (B) in FIG. 808) that are individually generated in synchronization with VCLK. That is, a synchronous clock 2VCLK803 having a frequency twice that of VCLK801, one of which is, for example, JK
A triangular wave generated by a triangular wave generation circuit 908 in accordance with a reference signal 806 for generating a triangular wave divided by a flip-flop 906.
WV1 and the other is a triangular wave WV2 generated by the triangular wave generation circuit 909 in accordance with the signal 807 ((B) FIG. 807 reference) generated by dividing 2VCLK by 6 by the 6 frequency division circuit 905. Each triangle wave and VIDEO
All DATA is generated in synchronization with VCLK as shown in FIG. Further, each signal is HSYNC inverted in order to synchronize with HSYNC 802 generated in synchronization with VCLK to initialize the circuits 905 and 906 at the timing of HSYNC. As a result of the above operation, a signal having a pulse width as shown in FIG. 7C is obtained at the outputs 810 and 811 of the CMP1 910 and CMP2 911 in accordance with the value of the input VIDEO DATA 800. That is, in this system, when the output of the AND gate 913 in Fig. (A) is "1", the laser is turned on, dots are printed on the print paper, when it is "0", the laser is turned off and nothing is printed on the print paper. Not done. Therefore, turning off can be controlled by the control signal LON (805). FIG. 6C shows a state where the level of the image signal D changes from left to right from “black” to “white”. Since "white" is input as "FF" and "black" is input as "00" to the PWM circuit, the output of the D / A converter 902 changes like Di in FIG. On the other hand, the triangular wave is WV1 in (a) and WV in (b)
The pulse width becomes narrower as the output of CMP1 and CNP2 shifts from "black" to "white" like PW1 and PW2, respectively. Also, as is clear from the figure,
When PW1 is selected, the dots on the print paper will be P ₁ → P ₂ → P ₃
→ It is formed with the interval of P ₄ , and the variation of the pulse width has the dynamic range of W 1. On the other hand, if you select PW2, the dot will be P
They are formed at intervals of ₅ → P _{6, and} the dynamic range of the pulse width is W2, which is three times that of PW1. By the way, for example, the print density (resolution) is about 400 lines / inch at PW1.
For PW2, it is set to about 133 lines / inch. Also, as is clear from this, when PW1 is selected, the resolution is about 3 times better than when PW2 is selected, while when PW2 is selected, the pulse width dynamic range is about 3 times wider than PW1. , The gradation is remarkably improved. Therefore, for example, when high resolution is required, PW1 is selected, and when high gradation is required, PW2 is selected by the external circuit to provide SCRSEL804. That is, 912 in the figure (A) is a selector, and when SCRSEL804 is "0", A
Input selection, that is, when PW1 is "1", PW2 is output from the output terminal, the laser is turned on for the finally obtained pulse width, and dots are printed.

LUT901 but is a table conversion ROM for gradation correction, K _1, K _2, 814 table switching signal of 812 and 813 to the address, 815 video signals are input, corrected VIDEO DAT from the output
A is obtained. For example, set SCRSEL804 to "0" to select PW1.
When set to, all the outputs of the ternary counter 903 become "0", and the correction table for PW1 in 901 is selected. Also K ₀ , K ₁ , K ₂
Are switched according to the output color signal, for example, K ₀ , K
₁ , K ₂ = “0,0,0” yellow output, “0,1,0” magenta output, “1,0,0” cyan output, “1,1,0” When black is output. That is, the gradation correction characteristic is switched 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. Further, by combining K ₂ and K ₀ , K ₁ , it is possible to perform gradation correction in a wider range. For example, the gradation conversion characteristics of each color can be switched according to the type of input image. Next, when SCRSEL is set to “1” in order to select PW2, the ternary counter 603 counts the line synchronization signal and “1” → “2” → “3” → “1” → “2”. → "3" →
Is output to the address 814 of the LUT. As a result, the gradation correction table is switched for each line to further improve the gradation.

This will be described in detail with reference to FIG. For curve A in FIG. 9A, for example, PW1 is selected and the input data is “FF”, that is, “white”.
It is a characteristic curve of input data versus print density when changing from "0" to "black". As a standard, it is desirable that the characteristic is K. Therefore, B, which is the inverse characteristic of A, is set in the gradation correction table. FIG. 6B shows the gradation correction characteristics A, B, and C for each line when PW2 is selected, and the pulse width in the main scanning direction (laser scan direction) is changed by the above-mentioned triangular wave, and at the same time, sub scanning is performed. As shown in the figure, the direction (image feeding direction) is provided with three gradation levels to further improve the gradation characteristics. That is, the characteristic A is predominant in the portion where the density change is abrupt, the sharp reproducibility is reproduced, the gentle gradation is reproduced by the characteristic C, and the character B reproduces an effective gradation in the middle portion. Therefore, even when PW1 is selected as described above, a certain level of gradation is ensured with high resolution, and when PW2 is selected, extremely excellent gradation is guaranteed. Further, regarding the above-mentioned pulse width, for example, in the case of PW2, ideally the pulse width W is 0.
≤W≤W2, but due to the electrophotographic characteristics of the laser beam printer and the response characteristics of the laser drive circuit, etc., areas where dots are not printed (no response) with a pulse width shorter than a certain width. There is wp and a region where the density is saturated, FIG. 28 wq ≦ W ≦ W2. Therefore, the pulse width and the density are set so that the pulse width changes within the linear effective region wp ≦ W ≦ wq. That is, when the input data 0 (black) changes to FFH (white) as shown in FIG. 28 (B), the pulse width changes from wp to wq, further guaranteeing the linearity between the input data and the density. .

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

The signals K ₀ , K ₁ , K ₂ , SCRSEL, LON in FIG.
Output from a control circuit (not shown) in the printer controller 700 and based on serial communication with the reader unit 1 (described above). Especially, SCRSEL = "0" when the reflection original is used, and SCRSEL = "" when the film projector is used. It is controlled to 1 "to reproduce smoother gradation.

[Image forming operation]

Now, the laser light LB modulated corresponding to the image data
Is horizontally scanned at a high speed horizontally by a polygon mirror 712 which rotates at a high speed within a width of an arrow AB in FIG. 30, passes through the f / θ lens 13 and the mirror 714, and forms an image on the surface of the photosensitive drum 715. Corresponding dot exposure is performed. 1 of laser light
The horizontal scanning corresponds to one horizontal scanning of the original image, and in this embodiment, corresponds to a width of 1/16 mm in the feeding direction (sub scanning direction).

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

Next, the tip of the transfer drum 7 is supported by the gripper 751.
A yellow toner image is transferred and formed on the paper sheet 754 wound around 16 by a transfer charger 729 provided at the contact point between the photosensitive drum 715 and the transfer drum 716. The same processing steps are repeated for M (magenta), C (cyan), and BK (black) images, and each toner image is printed on the paper sheet 75.
By superimposing on 4, a full-color image with 4 color toners is formed.

Thereafter, the transfer paper 791 is separated from the transfer drum 716 by the movable separation claw 750 shown in FIG. 1, guided to the image fixing section 743 by the conveyor belt 742, and the heat pressing rollers 744 and 745 are attached to the fixing section 743.
Thus, the toner image on the transfer paper 791 is fused and fixed.

<Explanation of operation section> Figure 41 is an illustration of the operation section of this color copying machine.
1 is a reset key for returning to the standard mode, key 402 is an enter key for setting the registration mode described later, key 40
4 is a numeric keypad for inputting numerical values such as the set number, key 403
Is a clear / stop key for clearing the numbers and stopping during continuous copying, and 405 is for displaying each mode setting and printer 2 state by the touch panel key. Key
Reference numeral 407 denotes a center movement key that specifies center movement in a movement mode described later, key 408 denotes a document recognition key that automatically detects the document size and document position during copying, and key 406.
Is a projector key that specifies a projector mode to be described later, key 409 is a recall key for restoring the previous copy setting state, and key 410 is a memory for storing or recalling preprogrammed setting values of each mode. Keys (M1, M2, M3, M4) and key 411 are registration keys for each memory.

<Digitizer> FIG. 32 is an external view of the digitizer 16. Key 422,423,
Reference numerals 424, 425, 426, and 427 are entry keys for setting each mode described later, the coordinate detection plate 420 is a coordinate position detection plate for designating an arbitrary area on the document or setting a magnification, and the point pen 421 is The coordinates are specified. Data of these keys and coordinate input information is received from the CPU 22 via the bus 505, and accordingly, these information is stored in the RAM 24 and the RAM 25.

<Description of Standard Screen> FIG. 33 is an explanatory diagram of a standard screen. The standard screen PO00 is a screen displayed when copying or setting is not being performed, and variable magnification, paper selection, and density adjustment can be set. In the lower left part of the screen, so-called standard variable magnification can be designated. For example, when the touch key a (reduction) is pressed, the size change and the magnification are displayed as shown on the screen PO10. Further, when the touch key b (enlargement) is pressed, the size and the magnification are displayed in the same manner, and in the color copying apparatus, reduction 3 stages and enlargement 3 stages can be selected.
When returning to the same size, press the touch key h (1x) to get the same size.
100% magnification. Next, when the touch key c in the center of the display is pressed, the upper cassette and the lower cassette can be selected. Further, when the touch key d is pressed, it is possible to set the APS (auto paper select) mode in which the cassette containing the paper most suitable for the document size is automatically selected. Touch keys e and f on the right side of the display are keys for adjusting the density of the print image and can be set during copying. As for the touch key g, an explanation of each touch key, how to make a copy, and the like are given when operating this color copying apparatus. This is an explanation screen, and the operator can easily handle this screen. In addition to the explanation of the standard screen, the explanation screen of each mode is prepared in each setting mode described later. A black strip-shaped stripe display section at the top of the screen displays the status of each mode currently set so that the user can confirm the operation mistake or setting. The message display section at the bottom of the screen displays the status of the color copying machine such as the screen PO20 and a message such as an operation error. Further, the JAM and the supply message of each toner are displayed on the printer unit 16 on the entire screen, so that it is easy to determine which part has the paper.

<Zoom magnification / reduction mode> The zoom magnification / reduction mode M100 is a mode for printing by changing the size of an original, and is composed of a manual zoom magnification / reduction mode M110 and an automatic zoom magnification / reduction mode M120. Manual zoom variable magnification mode M110 has X direction (sub scanning direction) and Y direction.
The magnification in the direction (main scanning direction) can be set independently in units of 1% from the editor or the touch panel. Automism scaling mode M120 is a mode that automatically calculates and copies an appropriate scaling factor according to the original and the selected paper size.In addition, XY independent auto scaling, XY same-ratio auto scaling, X auto scaling, Y Four types of auto scaling can be specified. In the XY independent automatic scaling, the magnifications in the X and Y directions are independently and automatically set so that the original size or the paper size selected for the designated area on the original is obtained. XY
In the same rate auto scaling, the XY independent auto scaling results in the smaller magnification, and both XY are scaled and printed.
The X automatic scaling and the Y automatic scaling are modes in which the automatic scaling is performed only in the X direction and only in the Y direction.

Next, a method of operating the zoom magnification / reduction mode will be described using a liquid crystal panel screen. When the zoom key 422 of the digitizer 16 is pressed, the display changes to the screen P100 shown in FIG. When the user wants to set the manual zoom here, the point pen 421 is used 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 is changed to the screen P110, and the designated X and Y magnification values are displayed. Therefore, when it is desired to finely adjust the displayed magnification, for example, in the X direction only, the left and right keys (up, down) of the touch key b are pressed and adjusted. If you want to make adjustments at the same XY ratio, use the left and right keys of the touch key d and the display will be updated at the same XY ratio. Next, when it is desired to set the auto zoom, from the screen P100, use the digitizer 16 in the above-described method or press the touch key a to advance the display to the screen P110. Therefore, the above-mentioned 4 types of auto zoom, XY independent auto scaling, XY same ratio P auto scaling,
When specifying X auto scaling and Y auto scaling, touch key b and C, touch key d, touch key b, respectively.
By pressing the touch key c, the desired auto zoom can be obtained.

<Movement Mode> The movement mode M200 includes four types of movement modes, which are a center movement M210, a corner movement M220, a designated movement M230, and a binding margin M240. Center move M21
0 is a mode in which the document size or a designated area on the document is moved so as to be printed exactly in the center of the selected sheet. The corner move M220 is a mode in which the document size or a designated area on the document is moved to one of the four corners of the selected sheet. Here, as shown in FIG. 43, even when the print image is larger than the selected paper size, it is controlled to move starting from the designated corner. The designated movement M230 is a mode in which an original or an arbitrary area of the original is moved to an arbitrary position on the selected sheet. The binding margin M240 is a mode that moves to the left and right of the selected paper feeding direction so as to create a so-called binding margin.

Next, in the color copying machine, the actual operation method
This will be described with reference to FIG. First, when the move key 423 of the digitizer 16 is pressed, the display changes to screen P200. On screen P200, the four types of movement modes described above are selected.

If you want to specify center movement, press touch key a on screen P200 to finish. In the corner movement, when the touch key b is pressed, the display changes to the screen P230, and one of the four corners is designated there. Here, the correspondence between the actual movement direction of the print paper and the designated direction on the screen P230 is
As shown in FIG. 35 (b), the image of the selected cassette on the digitizer 16 is not changed, and the image is the same as the one placed as it is. When you want to make a designated move,
The touch key c on the screen P200 is pressed to proceed to screen P210, and the digitizer 16 is used to specify the destination position. At this time, the display changes to the screen P211, and the up-down key in the figure can be used for further fine adjustment. Next, when the user wants to move the binding margin, the touch key d on the screen P200 is pressed, and the length of the margin is designated by the up-down key on the screen P220.

<Explanation of area designation mode> In the area designation mode M300, one area or a plurality of areas on the original can be designated, and any one of three modes of the trimming mode M310, the masking mode M320, and the image separation mode can be specified for each area. You can set the mode. The trimming mode M310 described here is to copy only the image inside the specified area.
Means that the inside of the specified area is masked with a white image and copied. The image separation mode M330 is further composed of a color mode M331, a color conversion mode M332, and a paint mode M33.
3, Any color balance mode M334 can be selected. In the color mode M331, 4 colors full color, 3 colors full color Y, M, C, Bk, RED, GRE
You can select any color mode from 9 types, EN and BLUE. The color conversion mode M332 is a mode in which a predetermined color portion having a certain density range is replaced with another arbitrary color in the designated area and is copied.

The paint mode M333 is a mode for making a copy uniformly painted over in the designated area with another arbitrary color. The color balance mode M334 is a mode in which the density of each of Y, M, C, and Bk in the designated area is adjusted to print with a color balance (color tone) different from that of the undesignated area.

A specific operation method in this embodiment of the area designation mode M300 will be described in order with reference to FIG. First digitizer
16 When the area designation key 424 on the upper side is pressed, the liquid crystal display will change to screen P300.
Then, the original is placed on the digitizer 16 and the area is designated by the point pen 421. When two points in the area are pressed, the display changes to the screen P310, and if the specified area is good, the touch key a on the screen P310 is pressed. Next, one of the trimming, masking, and image separation displayed on the screen P320 is selected for this designated area, and the key is pressed. If the designation is trimming or masking at this time, the touch key a key on the screen P320 is pressed to proceed to the next region designation. When the image separation is selected on the screen P320, the process proceeds to a screen P330, and any one of color conversion, paint, color mode, and color balance is selected. For example, if you want to print the image in the specified area in four colors of Y, M, C, Bk, press touch key a (color mode) on screen P330 and select touch key a from the nine color modes on screen P360. Press to complete the designation to print the area in 4 full colors.

When the touch key b for specifying the color conversion is pressed on the screen P330, the display proceeds to the screen P340, and the point having the color information to be color-converted in the specified area is specified by the point. If the designated position is acceptable, touch the touch key a on the screen P341 and proceed to the screen P370. The screen P370 is a screen for designating a color after conversion, and designates one of four types of standard color, designated color, registered color, and white. Here, when selecting the color after conversion from the standard color, press the touch key a on the screen P370 and press the yellow, magenta, cyan, black,
One of the seven colors of red, green, and blue is specified here.
In other words, the standard color is the color information unique to this color copying machine, and in the case of this embodiment, it is printed as an intermediate density as the density of the print image at the ratio shown in FIG. There is. However, of course, there is a demand to make the density of the specified color lighter or darker,
For that reason, it is possible to perform color conversion with a desired density by pressing the density designation key in the center of the screen P390.

Next, when touch key c (designated color) is selected on screen P370, proceed to screen P380, and specify the point with the converted color information with the point pen in the same specification method as the color coordinates before conversion.
Go to screen P381. Again, as described above, if you want to perform color conversion by changing only the density without changing the tint of the designated coordinates, press the density adjustment k key a in the center of the screen P381 to perform color conversion at the desired density. It becomes possible to do.

Next, on the screen P370, when there is no standard color or a desired color on the original, color conversion can be performed using the color information registered in the color registration mode M710 described later. In this case, screen P3
Press the touch key c of 70 and press the touch key of the color number you want to use among the colors registered on screen P391. Also here, the density of the registered color can be adjusted by changing only the density without changing the ratio of each color component. If touch key c (white) is specified on screen P370, the above-mentioned masking mode M310
It has the same effect as.

Next, when you want to specify the paint mode M333 of the image separation mode M330, press the touch key c on the screen P330, and the screen P370
Go to. The subsequent color designation after painting is completely the same as the setting method after the screen P370 of the color conversion mode M332.

On the screen P330, if you want to print with the desired color balance (color tone) only in the specified area, press the touch key d (color balance). At this time, the display changes to the screen P350, and here, the density adjustment of the toner components of the printer, such as yellow, magenta, cyan, and black, is performed using the up-down touch key. Here, on the screen P350, the black bar graph shows the state in which the density is designated, and a scale is displayed beside it to make it easy to see.

<Explanation of color create mode> In the color create mode M400 shown in FIG. 41, one or more of five modes of color mode M410, color conversion mode 420, paint mode M430, sharpness mode M440 and color balance mode M450 can be designated. Is possible.

Here, in the area specification mode M300, the color mode M331,
Color conversion mode M332, paint mode M333, color balance
The difference from the M334 is that the color create mode M400 has the same function except that the function operates not on a certain area of the document but on the entire document.
Therefore, the description of the above four modes is omitted.

The sharpness mode 440 is a mode for adjusting the sharpness of the image, and is a mode for adjusting the ratio of emphasizing edges on a so-called character image or producing a smoothing effect on a halftone image. Next, the color create mode setting method will be described with reference to the explanatory diagram of FIG. When the color create mode key 425 of the digitizer 16 is pressed, the liquid crystal display changes to the display of screen P400. When touch key b (color mode) is pressed on screen P400, the process proceeds to screen P410, where the color mode to be copied is selected. If the desired color mode is a monochrome color mode other than 3 color and 4 color, further display is on screen P411.
You can select negative or positive by going to. When the touch key c (sheepness) is pressed on the screen P400, the screen changes to the screen P430 and the sharpness for the copy image can be adjusted. When the strong touch key i on the screen P430 is pressed, the amount of edge enhancement increases, as described above, and particularly fine lines such as character images are copied neatly. When the touch key h, which is weak, is pressed, the peripheral pixels are smoothed, the amount of so-called smoothing is increased, and settings can be made so that moire or the like at the time of halftone dot original can be erased.

Further, the operations of the color conversion mode M420, the paint mode M430, and the color balance M450 are the same as those in the area designation mode, and therefore will be omitted here.

<Explanation of embedding composition mode> In embedding composition mode M6, the specified color image area is specified for the monochrome image area (color image area may be used) for the originals E and F in Fig. 42. Within
This is a mode in which printing is performed by moving the image in the same size or in a variable size.

A method of setting the embedded combination mode will be described with reference to a picture on the liquid crystal panel and a touch panel key operation. First digitizer
When the original is placed on the 16 coordinate detection plate and the entry combination key 427, which is the entry key in the entry combination mode, is pressed, the liquid crystal screen changes from the standard screen P000 in Figure 33 to the screen in Figure 39.
Change to P600. Next, the color image area to be moved is designated by the point pen 421 at two points on the diagonal line of the area. At that time, on the liquid crystal screen, two dots that are similar in shape to the actually specified position are displayed as in screen P610. If it is desired to change the designated area to another area at this time, the touch key a on the screen P610 is pressed and two points are designated again. If the designated area is satisfactory, the touch key b is pressed, then two points on the diagonal line of the destination monochrome image area are designated by the point pen 421, and if the designated area is good, the touch key c on the screen P630 is pressed. At this time, the liquid crystal screen changes to screen P640, and the magnification of the moving color image is designated here. When it is desired to fit the moving image in the same size, the touch key d is pressed, and the end touch key is pressed to complete the setting. At this time, as shown in A and B of FIG. 2-12, when the moving image area is larger than the moving destination area, it is fitted according to the moving destination area, and when it is small, the open area is printed as a white image. Is automatically controlled.

Next, when it is desired to change the size of the designated color image area and fit it, press the touch key e on the screen P640. At this time, the screen is changed to the screen P650, and the magnification in the X direction (sub scanning direction) and Y direction (main scanning direction) is set in the same manner as in the zoom variable magnification mode operation method described above. First, when you want to fit the specified moving color image area with automatic scaling of XY same ratio, screen P6
Press the 50 touch key g to reverse the key display.
Also, when it is desired to print the moving color image area in the same size as the destination area, the touch keys h and i on the screen P650 are pressed to reverse. Also, when setting the variable magnification only in the X direction only, the Y direction only, or the XY same ratio, the setting can be done by pressing the up down touch key.

When the above setting operation is completed, press the touch key j,
The screen returns to the standard screen P000 in Fig. 33, and the setting operation of the inset compositing mode is completed.

<Enlarged continuous shooting mode> Enlarged continuous shooting mode M500 is used when the original size or the specified area of the original is copied at the set magnification and the selected paper size is exceeded. In this mode, the document is automatically divided into two or more areas, and each part of the divided document is output on a plurality of sheets. Therefore, by combining these plural copies, it is possible to easily make a copy larger than the designated paper size.

First of all, the actual setting operation is the enlarged continuous shooting key of the digitizer 16.
The setting is completed by pressing 426 and pressing the end key of touch key a on screen P500 of FIG. After that, it is only necessary to select a desired magnification and paper.

<Registration Mode> The registration mode M700 is composed of three types of modes: a color registration mode M710, a zoom program mode M720, and a manual feed size designation mode M730.

The color registration mode M710 is the color creation mode M4 described above.
00 and area designation mode When the color conversion mode and paint mode of M300 are designated, the color after conversion can be registered in this mode. In the zoom program mode M720, the magnification is calculated automatically by inputting the length of the original size and copy paper size, and the resulting magnification is displayed on the standard screen P000. is there. In the manual copy size specification mode M730, in this color copying machine, in addition to the cassette feed on the upper and lower stages, manual copy is possible.
If you want to use the so-called APS (Auto Paper Select) mode, you can specify the size of the manual feed.

First, when the * key 402 on the operation unit of FIG. 31 is pressed,
The display changes to screen P700 in FIG. Next, color registration mode M710
When the touch key a on the screen P700 is pressed, the color is registered or the original is placed on the digitizer 16 on the screen P710, and the color portion is designated by the point pen 421.

At this time, the screen changes to screen P711, and press the touch key of the registration number you want to set. If you want to register other colors, press the touch key d on screen P711 and
Return to P710 and set in the same procedure. When the input of the coordinates to be registered is completed, the touch key e is pressed, and the touch key f which is the reading start key on the screen P712 is pressed.

After the touch key f is pressed, it operates according to the flow chart process of FIG. First, in S700, the halogen lamp 10 is turned on, and in S701, the movement pulse number of the stepping motor is calculated from the above-specified coordinates (sub-scanning direction), and the document scanning unit 11 is moved by issuing the above-mentioned specified movement command. In S702, one line of the sub-scanning position whose coordinates are specified by the line data acquisition mode is RA in FIG. 11 (a).
Import to M78 '. In S703, the CPU 22 calculates the average value of 8 pixels before and after the main scanning position for which the coordinate is specified from the fetched 1-line data, and stores it in the RAM 24. In S704, it is determined whether or not the designated number of registered coordinates have been read. When all the reading positions are completed, the halogen lamp 10 is turned off in S705, the document scanning unit is returned to the HP position which is the reference position, and the operation is completed.

Next, when the touch key a (zoom program) is pressed on the screen P700, the screen changes to a screen P720, where the length of the original size and the length of the copy size are set with the UP key. The set value is displayed on screen P720 and is displayed at the same time. The% value of is displayed. Further, the calculation result is displayed at the magnification display position of the standard screen P000, and the magnification at the time of copying is set.

Next, when the touch key c (specify manual feed size) is pressed on the screen P700, the screen advances to a screen P730 where the paper size of the manual feed paper is designated. This mode is, for example, an APS mode or an automatic zoom scaling function for manual bypass paper.

Numerical values and information set by touch panel or digitizer coordinate input in each mode are stored in the pre-arranged areas of RAM24 and RAM25 under the control of CPU22, and are called and controlled as parameters during the subsequent copy sequence. It

FIG. 51 shows the operation procedure of the operation section when the film projector (Fig. 24, 211) is installed. After the film projector 211 is connected, turn on the projector mode selection key shown in FIG. 31, 406, and the display on the LCD touch panel will be displayed.
Change to P800. On this screen, select whether the film is negative or positive. For example, if you select the negative film here, the screen changes to P810, which is the film ASA sensitivity selection screen. Here, for example, the film sensitivity ASA100 is selected. Among them, as described in detail in the procedure described in FIG. 29, by setting the negative base film and turning on the P820 shading start key, the shading correction and then the negative film to be printed are set in the holder 215. Then
After the AE operation for determining the exposure voltage is performed by turning on the copy button (400 in FIG. 31), as shown in FIG. 25 (a),
Image formation is repeated in the order of yellow, magenta, cyan, and Bk (black).

FIG. 46 is a flow chart of sequence control of this color copying apparatus. The following is a description along the flow chart. By pressing the copy key, the halogen lamp is turned on in S100, and the black correction mode which is the operation described above in S101, S102
To perform the white correction mode scheduling process. Next, if the designated color conversion is set in the color conversion mode or the paint mode, the color registration and designated color reading processing of S104 is performed, and the color separated color density data of the designated coordinates is registered in the designated mode and designated color detection. In response, each is stored in a predetermined area. This operation is as shown in FIG. In S105, it is judged whether the document recognition mode is set, and if it is set,
The scanning unit 16 of S106-1 is scanned by the maximum document detection length of 435 mm, and the document recognition 200 described above detects the position and size of the document through the CPU bus. If it is not set, the paper size selected in S106-2 is recognized as the original size, and these pieces of information are stored in the RAM 24. In S107, it is determined whether or not the moving mode is set, and when the moving mode is set, the document scanning unit 16 is moved to the document side in advance by the moving amount.

Next, in S109, based on the information set by each mode,
Create a bit map for the gate signal output of each function generated from RAMA136 or RAMB137.

FIG. 49 shows the RAM 2 of the information set in each mode described above.
4 is a RAM map diagram set in RAM 25. FIG. AREA_MODE stores the recognition information of the operation in each designated area, for example, each mode such as painting and trimming. AREA_X
Y contains the document size and size information for each area, and A
REA_ALPT stores information after color conversion and information on whether the standard color or the designated color is the registered color. AREA_ALPT_XY is AREA_ALPT
AR is an information area of color coordinates when the content of the
EA_DENS is the density adjustment data area after conversion. AREA_
PT_XY is an information area of color coordinates before conversion in the color conversion mode, and AREA_CLMD stores color mode information of a document or a designated area.

In REGI_COLOR, each color information registered in the color registration mode is stored and used as a registered color. This area is stored in the backup memory of the RAM 25 and is stored even when the power is turned off.

The bit map shown in Fig. 50 is created based on the above set information. First, from AREA_XY, which stores the size information of each area in FIG. 49, from the coordinate data in the sub-scanning direction, the X_ADD area is sorted in order from the smallest value,
The main scanning direction is similarly sorted.

Next, "1" is set to the BIT_MAP positions of the start point and the end point in the main scanning direction of each area, and the process is similarly performed up to the end point coordinates of the sub scanning. The bit position which gives "1" at this time corresponds to each gate signal generated from the RAMA136 or RAMB137, and the bit position is determined by the mode in the area. For example, area 1 which is the original area corresponds to TMAREA660, and area 5 for color balance designation corresponds to GAREA626. Hereinafter, similarly, a bit map for the area is created in the BIT_MAP area of FIG. Next, in S109_1, the following processing is performed for the mode in each area. First, the area 2 is a monochrome monochrome image in the monochrome monochromatic color mode. Even if the video is sent to the area 2 during the cyan development, the area 2 is printed with the image of only the cyan component and the other images of the yellow and magenta components are not printed. Therefore, if the designated area is selected in the single color mode, the ND image will be displayed, as shown in Fig. 16 (a).
Set the next coefficient in the register selected when MAREA 564 becomes active in the masking coefficient register of.

αY1, αY2, αY3 0,0,0 βM1, βM2, βM3 0,0,0 γC1, γC1, γC3 1 / 3,1 / 3,1 / 3 k2, l2, m2 0,0,0 Next, MAREA564 The masking coefficient register selected by "0" is set to the data (4
Color or use in 3 color mode). next,
For the area 2 which is the paint mode, the above-mentioned BIIMAP
Gate signal CHAREA for each bit in the area
Data is set in each register of FIG. 18 (a) selected by 0, 1, 2, 3. First, in order to convert all input videos, yu159 to FF, yl160 to 00, mu161 to FF, ml162 to 0.
Set 0, Cu163 to FF, Cl164 to 00, load the converted color information stored in FIG. 49 from AREA_ALPT or REGI_COLOR, multiply each color data by the coefficient of density adjustment data of ARE_DENS, The density data after conversion into y'166, m'167, and c'168 are set. For the color conversion of area 4, the yu159, ..., cl164 registers described above are added to the density data before conversion shown in FIG. 49 to which a certain offset value is added, and then the same conversion is performed. Set later data. In the color balance of area 5, in the area of Y, M, C, Bk of the RAM 177 selected by the gate signal GAREA626 by "1", the color balance value AREA when the area is specified in FIG. 49 is specified.
The data value described above is set from _BLAN, and the data is set to the area selected by GAREA626 by "0" from BLANCE which is the color balance at the time of color creation.

In S109, the start command to the printer is output via SRCOM516. This is shown in the timing chart of FIG. 47 at S110. Detect ITOP and output video signal of Y, M, C, Bk in S111
Switching between C ₀ , C ₁ and C ₂ , and turning on the halogen lamp in S112.
If the end of each video scan is judged in S113,
In S114, the halogen lamp is turned off, and in S114 and S115, a check for ending the copy is performed. When the check is completed, a stop command is output to the printer in S116 to end the copy.

Fig. 48 is a flowchart of the interrupt processing of the signal HINT517 output from the timer 28. In S200-1, check whether the stepping motor start timer is completed, and if so, start the stepping motor. One line of BIT_M indicated by X_ADD shown in Fig. 50 above in S200
The AP data is set in RAM136 or RAM137. In S201, the address of the data set at the next interrupt is incremented by 1. S2
In 02, switching signal of RAM136, RAM137 C ₃ 595, C ₄ 596, C ₅ 593
Is output, and the time until the next sub-scanning switching is started in S203
Set to 28, and sequentially write the contents of BIT_MAM indicated by X_ADD below.
Set to M136 or RAM137 to switch the gate signal.

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

As described above, according to the color copying apparatus of this embodiment, various color modes are possible, and free color reproduction is possible.

In this embodiment, a color image forming apparatus using electrophotography has been described as an example, but not limited to electrophotography, various recording methods such as ink jet recording and thermal transfer recording can be applied. Further, the example in which the reading unit and the image forming unit are arranged close to each other as the copying apparatus has been described, but the present invention can of course be applied to a form in which image information is transmitted by a communication line while being separated from each other.

[Effects of the Invention] As described above, according to the present invention, a color after conversion when performing color conversion processing is a desired color on a document for which color conversion processing is visually easy to understand, or a plurality of types of standard Since any one of the colors can be selected, there is an effect that it is easy to use when performing the color conversion processing.

[Brief description of drawings]

FIG. 1 is a diagram showing a digital color copying machine of this embodiment, FIG. 2 is a control block diagram of a reader controller, and FIG.
The figure shows the protocol of the motor driver 15 and the CPU 22 of FIG. 2, FIG. 4 (a) is a timing diagram of control signals between the reader section and the printer section, and FIG. 4 (b) is the section between the reader section and the printer section. FIG. 4 (c) is a timing diagram of each signal on the signal line SRCOM, FIG. 5 is a detailed circuit diagram of the video processing unit of FIG. 2, and FIG. 6 (a) is a color diagram.
Arrangement of CCD sensor, FIG. 6 (b) shows a signal timing diagram of each part of FIG. 6 (a), and FIG. 7 (a) shows a CCD drive signal generation circuit (system control pulse generator 57 internal circuit). FIG. 7 (b) is a signal timing diagram of each part of FIG. 7 (a), FIG. 8 (a) is a detailed diagram of the analog color signal processing circuit 44 of FIG. 5, and FIG. 8 (b) is FIG. 8 (a) is a signal timing diagram of each part, FIG. 8 (c) is an input / output conversion characteristic diagram, and FIG. 9 (a), (b), (c), (d).
Is an explanatory diagram for obtaining each line signal from the staggered sensor,
FIG. 10 (a) is a black correction circuit diagram, FIG. 10 (b) is an explanatory diagram of black correction, FIG. 11 (a) is a white level correction circuit diagram, and FIGS. 11 (b), (c), (d). ) Is an explanatory diagram of white level correction, No. 12
Fig. 13 is an explanatory diagram of the line data fetching mode, Fig. 13 (a) is a logarithmic conversion circuit diagram, Fig. 13 (b) is a logarithmic conversion characteristic diagram, Fig. 14 is a spectral characteristic diagram of the reading sensor, and Fig. 15 is development. Spectral characteristic diagram of color toner, Fig. 16 (a) shows masking,
Inking and UCR circuit diagram, FIG. 16 (b) is a diagram showing the relationship between the selection signals C ₀ , C ₁ , C ₂ and the color signals, FIGS. 17 (a), (b),
(C), (d), (e), (f), and (g) are explanatory diagrams of area signal generation, and FIGS. 18 (a), (b), (c), (d),
(E) is an explanatory diagram of color conversion, and FIGS. 19 (a), (b),
(C), (d), (e) and (f) are explanatory views of gamma conversion for color balance and color density control, FIG. 20 (a),
(B), (c), (d), (e), (f), and (g) are explanatory views of the scaling control, and FIGS. 21 (a), (b), (c),
(D), (e), (f), and (g) are explanatory views of edge enhancement and smoothing processing, FIG. 22 is a control circuit diagram of the operation panel unit, FIG. 23 is a configuration diagram of a film projector, and FIG. twenty four
The figure shows the relationship between the control input of the film exposure lamp and the lighting voltage. Figures 25 (a), (b), and (c) are explanatory views when the film projector is used, and Figures 26 (A) and (B). ),
(C) is an explanatory diagram of the PWM circuit and its operation, FIGS. 27 (A) and (B) are gradation correction characteristic diagrams, and FIG. 28 (A),
FIG. 29B is a diagram showing the relationship between the triangular wave and the laser lighting time,
Figures (a) and (b) are control flow charts when the film projector is used, Figure 30 is a perspective view of the laser print section, Figure 31 is a top view of the operation section, and Figure 32 is a top view of the digitizer. FIG. 33 is an explanatory view of the liquid crystal standard display screen, FIG. 34 is an explanatory view of operation in the zoom mode, FIGS. 35 (a) and 35 (b) are operation explanatory views in the movement mode, and FIG. 36 is an area designation mode. Operation explanatory diagram, FIG. 37 is an operational explanatory diagram of the color create mode, FIG. 38 is an operational explanatory diagram of the enlarged continuous shooting mode, FIG. 39 is an operational explanatory diagram of the inset combining mode, and FIG. 40 is an operational explanatory diagram of the registration mode Fig. 41, Fig. 41 is a functional diagram of the color copying machine of the present embodiment, Fig. 42 is an explanatory diagram of the embedding combination mode, Fig. 43 is a diagram showing a print image at the time of corner movement, and Fig. 44 is a color registration mode. Control flow chart of Fig. 45, Fig. 45 shows the color components of standard colors, and Fig. 46 is the whole System control flow chart, Fig. 47 is time chart of the whole system, Fig. 48 is interrupt control flow chart, Fig. 49 is RAM.
50 is a diagram showing a memory map of FIG. 50, FIG. 50 is a diagram for explaining a bit map, and FIG. 51 is a diagram for explaining an operation of the projector.

Claims (1)

[Claims] 1. A color designation means for designating a color to be converted when performing color conversion processing, a selection means for selecting one of a plurality of standard colors predetermined as a color after conversion, and a color after conversion. Position specifying means for manually specifying a position on the original containing the desired color to specify a desired color, illumination means for illuminating the original by performing relative movement with respect to the original, and manually specified by the position specifying means A color detection unit that illuminates the original document at a position by the illumination unit and detects the desired color in accordance with the obtained reflected light; A first color conversion mode for performing color conversion processing, and a second color conversion mode for performing the color conversion processing to convert the color to be converted on the original document into the standard color selected by the selection means. Color image processing apparatus characterized by comprising a color converter with and.