JPH0626435B2 - Color image processor - Google Patents

Description

The present invention relates to a color image processing apparatus.

[Prior Art] When converting a predetermined color on the conventional original into a desired color,
A desired color is decomposed into color components, and a plurality of patterns are stored in advance in a memory for each color component, and the input original image data is compared to see if it is the predetermined color. The color conversion process is performed by replacing the image data with a desired color selected from a plurality of desired colors stored in the memory.

[Problems to be Solved by the Invention] However, when a desired color is stored in a memory in advance and converted into a stored color as in the conventional case, a color other than a plurality of predetermined colors stored in the memory in advance is used. Can not be converted, the color after color conversion is actually printed out,
Until the output, it was not known whether the desired color selected was the color the user had in mind.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention specifies a conversion color designating means (in this embodiment, P340 and P341 in FIG. 36) for designating an arbitrary color to be converted as a color before conversion. The target color position designating means (the third embodiment in this embodiment) for designating the color at the designated position on the original as the target color after conversion by designating an arbitrary position on the original.
(Corresponding to P380 and P381 in FIG. 6), reading means for pre-scanning the original and reading the converted target color at the position designated by the target color position designating means (also in FIG. 46, S104 color registration, designated color detection processing) Storage means (corresponding to RAM 24 in FIG. 2 in the embodiment) for storing the converted target color read by the reading means, causing the reading means to scan the original again, and read the original image data according to the read image data. When the color represented by the read image data is determined to be the color before conversion designated by the conversion color designating unit, the output unit outputs the color represented by the read image data. Converting means for converting and outputting to the converted target color stored in the storing means (FIG. 18 (a) detected by video scanning in S113 in FIG. Color component data (Yi, Mi, Ci)
Is determined by the window comparators 156 to 158 that the data of the registers 159 to 164 in which the colors before conversion obtained by the conversion color designating means are set substantially match, the register in which the colors after conversion of the color component data are set. 166-168
Equivalent to converting to the color).

〔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. Reference numerals 8 and 9 are a white plate and a black plate for white level correction and black level correction of an image signal, which will be described later. By irradiating with a halogen exposure lamp 10, it is possible to obtain respective signal levels of predetermined densities. It is used for white level correction and black level correction. Reference numeral 13 is a control unit having a microcomputer, which controls the display on the scanning panel 20, key input control and video processing unit 12 by a bus 508, and the position of the original scanning unit 11 by a position sensor S1, S2. , 510, and stepping motor drive circuit control for pulse driving the stepping motor 14 for moving the scanning body 11 by the signal line 503, and the halogen exposure lamp 10 by the exposure lamp driver via the signal line 504. ON / OFF control,
All controls of the color reader unit 1 such as light amount control and control of the digitizer 16 and internal keys and display unit via the signal line 505 are performed. The color image signal read by the above-described exposure scanning unit 11 at the time of document exposure scanning is input to the video processing unit 12 via the widening circuit 7 and the signal line 501, and various processing described later in this unit 12 is performed. And is 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 for converting an image signal from the color reader 1 into an optical signal, a polygon mirror 712 having a polyhedron (eg, 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, 7
15 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, and 731Bk are developing sleeves that directly contact the photosensitive drum 715 to perform development, 730Y, 730M, 730C, and 730.
Bk is a toner hopper for holding a spare toner, 732
Is a screen for transferring the developer, and includes sleeves 731Y to 731Bk and toner hoppers 730Y to 730Bk.
A developing unit 726 is constituted by the screen 732 and these members are arranged around the rotation axis P of the developing unit. For example, when a yellow toner image is formed, yellow toner development is performed at the position shown in the 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 neutralizer and 729 is a transfer charger. 720, 725, 727, and 729 are arranged around the transfer roller 716.

On the other hand, 735 and 736 are sheet feeding cassettes for storing sheets (paper sheets), 737 and 738 are sheet feeding rollers for feeding sheets from the cassettes 735 and 736, and 739, 740, and 741 are timings for feeding and conveying. These are timing rollers, and the paper fed and conveyed through these rollers is guided to the paper guide 749 and wound around the transfer drum 716 while the leading end is carried by the gripper described later, and shifts to the 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 micro computer, and controls the video signal processing control, the lamp driver 21 for exposure and scanning, the stepping motor driver 15, the digitizer 16, and the scanning panel 20, respectively.
The program ROM 23, RAM 24, RAM 25 are controlled organically in order to obtain a desired copy via 8 (bus), 504, 503, 505, etc. The RAM 25 is guaranteed to be non-volatile by the battery 31. 505 is a signal line for serial communication that is generally used and is input by the operator from the digitizer 16 according to the protocol between the CPU 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. The signal line 503 is a signal line for instructing the motor driver 15 from the CPU 22, such as scanning speed, distance, forward movement, and backward movement.
Input a predetermined pulse to 4 and give the motor rotation operation. The serial I / Fs 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 has a similar circuit. CPU22 and motor driver 1
Interface protocol between 5 and 5 is shown in Fig. 3.

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, SR in Fig. 2
COM (511 to 516) are interface signals between the color printer section 2 and the reader section 1 shown in FIG. 1, respectively. 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), and is sent once for one screen, that is, four colors (yellow,
Each of the magenta, cyan, and Bk) images is transmitted once, that is, four times in total. This is the transfer drum 71 of the color printer unit 2.
When the front end of the transfer paper wound around 6 receives the transfer of the toner image at the contact point with the photosensitive drum 715, the rotation of the transfer drum 716 and the photosensitive drum 715 should be adjusted so that the position of the front end of the original matches the position of the image. They are synchronized, sent to the video processing unit in the reader 1, and 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 a synchronization signal in the raster scan direction (hereinafter referred to as the main scanning direction) that occurs once per revolution of the polygon mirror 712, that is, once in one raster scan, and the image signal read by the reader unit 1 Are sent to the printer unit 2 line by line in the main scanning direction in synchronization with BD.
The VCLK 513 is a synchronous clock for sending the 8-bit digital video signal 514 to the color printer section 2, and sends the video data 514 via the flip-flops 32 and 35 as shown in FIG. 4 (b), for example. HSYNC 515 is from BD signal 512
It is created in synchronization with VCLK513. This is the main scanning direction synchronization signal, has the same cycle as BD, and the VIDEO signal 514 is strictly HS.
It is sent in synchronization with YNC515. This is because BD signal 515 is generated in synchronism with the rotation of the polygon mirror, and therefore contains a lot of jitter of the motor that rotates polygon mirror 712.
This is because if the signal is synchronized as it is, jitter occurs in the image, and therefore the HSYNC515 that is generated based on the BD signal in synchronization with VCLK without jitter is necessary. SRCOM is a signal line for half-duplex bidirectional serial communication. As shown in FIG. 4 (C), SRCOM is synchronized with 8-bit serial clock SCLK between synchronization signals CBUSY (command busy) sent from the reader. Command CM is sent out, and in response thereto, the status ST is returned from the printer section in synchronization with the 8-bit serial clock between SBUSY (status busy). In this timing chart, status "3" is issued for command "8EH".
"CH" is returned, and instructions from the reader to the printer, such as color mode and cassette selection, and printer status information, such as jam, paper-less, and weight information, can be exchanged. All are done via this 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, and is amplified to a predetermined level by the widening circuit 42. 41 supplies a pulse signal for driving the color reading sensor
It is a CCD driver, and the necessary pulse source is generated by the 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.
Since (1/16 mm) is one pixel, 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, the chips 58 to 62 are formed on the same ceramic substrate, the first, third and fifth sensors (58, 60, 62) of the sensor are on the same line LA, and the second and fourth sensors are four lines from LA ( 62.5 μm x
4 = 250 .mu.m) apart from each other on the line LB, and scans in the direction of arrow AL when reading a document. 5 CCDs each
, The 1st, 3rd and 5th are the drive pulse group ODRV518,
The second and fourth drives are driven by EDRV519 independently and synchronously. O01A, O02A, ORS included in ODRV518
E01A, E02A and ERS included in EDRV519 are charge transfer clock and charge reset pulse in each sensor respectively.
Due to mutual interference between the first, third, fifth, and second, fourth, and noise limits, they are generated in perfect synchronization with each other so that they are not in 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. The original clock OLK0 generated from a single OSC58 'is divided by clock K0535
Reference signals SYNC2 and SY that determine the generation timing of DRV and EDRV
The clock that generates NC3. SYNC2 and SYNC3 determine the output timing according to the set values of the presettable counters 64 and 65 set by the signal line 539 connected to the CPU bus, and SYNC2 and SYNC3 divide the frequency. 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 ED 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 the sensors 58, 59, 60, 61, and 62 in synchronization with the drive pulse. Is output to the coaxial cable 501 and is amplified to a predetermined voltage value by an independent amplifier circuit 42 for each channel shown in FIG.
Through (Fig. 1), V1, V3, and V5 are input at the timing of OOS529 in Fig. 6 (b), and V2, V4 signals are transmitted at the timing of EOS534 to the video processing unit.

The color image signal obtained by reading the document input to the video processing unit 12 by dividing it into five parts is divided into G ((green), B (blue), R (red) by the sample hold circuit S / H43. Separated into colors, so S / H
After that, it becomes a signal processing system of 3 × 5 = 15 systems. 8th
FIG. 3B shows a timing chart for obtaining the multiplexed 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. 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 circuit (S / H) 250 uses sample-and-hold pulses SHG535, SHB536, SHR537 for each color in parallel. Convert to. Fig. 8 (b) VDG1, VDB1, VDR1 (538 to 540)
Here, the signals 538 to 540 separated by color are amplifiers 251-2.
After the offset (O characteristic in Fig. 8 (C)) is adjusted in 53, the low pass filter (LPF) 254 to 256 is used to cut the band other than the signal component, and the gain is adjusted in the amplifiers 257 to 259 (Fig. 8 (C). ) G characteristics), then pulses GSEL, BSEL, RSEL (544
~ 546) becomes one system in MPX260, and it is converted into the digital value which is A / D converted (ADOUT547). With this configuration
Since it is multiplexed by MPX260 and then A / D converted, color signals of 15 channels in total of 5 channels for each of G, B, and R are performed by 5 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 the five staggered sensors divided into five areas in the main scanning direction, the preceding scanning is performed as shown in FIG. 9 (a). The reading position is different between the channels 2 and 4 and the remaining channels 1, 3 and 5. Therefore, in order to connect this correctly, a memory for a plurality of lines is used. 9th
FIG. 6B shows a memory configuration of this embodiment, and reference numerals 70 to 74 denote memories each storing a plurality of lines and having a FiFo configuration. That is, 70, 72, and 74 have a capacity of 5 lines with 1 line of 1024 pixels, and 71 and 73 have a capacity of 15 lines, and data is written for each line from the point indicated by the last pointer WPO75, WPE76. When writing for one line is completed, WPO or WPE is incremented by one. WPO75 is common to channels 1, 3 and 5, and WPE76 is common to 2 and 4.

OWRST540 and EWRST541 are each line pointer WPO7
5, A signal that initializes the value of WPE76 and returns it to the beginning.
542 and ERST543 are read pointers (pointers when reading)
Is a signal that returns the value of 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 four lines, so that the channel 2 reads the same line, for example, the channel 2 reads and writes to the FiFo memory 71, and then the channel 1 after four lines. Reads the line. Therefore, if WPE is advanced by 4 from the memory write pointer WPO,
When reading from the FiFo memory with the same read point value, the same line is read from channels 1, 3 and 5 and channels 2 and 4, and the deviation in the sub-scanning direction is corrected. For example, in FIG. 9B, the channel 1 has the WPO in the top line 1 of the memory, and the channel 2 has the WPE pointing to the fifth line 5 from the top. If you start from this point, when WPO shows 5 W
PE indicates 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) can be read out cyclically while advancing in the same manner. 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
Is generated with a deviation of 4 lines as shown in the figure, and ORST54
2 is the capacity of the FiFo memory 70, 72, 74, so every 5 lines, and the ERST 543 is generated every 15 lines for the same reason. On the other hand, at the time of reading, one line is read at a speed five times faster than the channel 1, then one line is similarly read from the channel 2, then 3 channels, 4 channels, and 5 channels are sequentially read. From 1 channel to 1 channel You can get the connected signal of. FIG. 9 (d) 1
1RD to 5RD (544 to 548) show the valid section signals of the read operation of each channel. In addition, the control signal for the image connection control between the channels using this FiFo memory is
FIG. 5 is generated by the memory control circuit 57 '. Circuit 57 'is TT
Although it is composed of a discrete circuit such as L, it is not the gist of the present invention, and therefore its explanation is omitted. Further, the memory has three colors of the blue component, the green component and the red component of the image, but since they have the same structure, the description is limited to only one color.

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 be input to the address input of the RAM, and a black level signal for one line is stored in the RAM 78. Stored (above black reference value capture mode). At the time of image reading, the RAM 78 is in the data reading mode, and is read out and inputted to the B input of the subtractor 79 line by line and pixel by pixel via 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 for the black level data DK (i), for example, in the case of a blue signal, Bin (i) −DK (i)
= Bout (i) (black correction mode). Similarly, green Gin and red Rin are also controlled by 77G and 77R. The control lines of each selector gate for this control are controlled by the CPU 85 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 sensitivity variations in 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, and 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 x FF _H / Wi. Therefore, from the CPU in the controller (Fig. 22), the latches 85 ″, ′,
The gate 80 'is closed for ′, ′, 81 ′ is opened, and further output so that B is selected by the selectors 82 ′, 83 ′, RA
Make the M78 'accessible to the CPU. Next for the first pixel Wo
FF _H / Wo, W ₁ are sequentially calculated as FF / W ₁ ... to replace the data. When the blue component of the color component image is finished (Step B in FIG. 11 (d)), the green component (StepG) and the red component (StepR) are sequentially performed in the same manner, and then Do = Di × FF for the input original image data Di. Gate 80 'is open ('), 81 'is closed (') so that _H / Wi is output, selector 83 '
Is the coefficient data F read from RAM78 'when A is selected.
F _H / 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 the image data for one line can be input at high speed and the RD and WR can be accessed by the CPU 22, any position on the document, for example, coordinates (Xmm, If you want to detect the component of the image data at point P (Ymm), move the scanning unit (16 × x) line in the x direction, and move this line by the same operation as described above.
The component ratios of B, G, and R can be detected by reading the data of the (16 × y) th pixel captured in M78 '(hereinafter, this operation is referred to as "line data capture 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 fragrance variation, and the white level sensitivity, and are corrected in 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, white = 00H, is possible converted black = FF _H, further image source input to the image reading sensor, such as a conventional reflective originals, transmission original such as a film Puroji EKTAR also negative film in 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, and the output for B (blue) is the yellow toner amount,
Since G (green) corresponds to a magenta toner amount and R (red) corresponds to a cyan toner amount, the color image data thereafter is associated with Y, 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,
For Mi and Ci, Masking correction for calculating a linear expression of each color and performing color correction is well known. Furthermore, by Yi, Mi, Ci, Min (Y
i, Mi, Ci) (the minimum value of Yi, Mi, Ci) is calculated,
Using this as a smear (black), an operation of adding black toner (smearing) later and an undercolor removal (UCR) operation of reducing the addition amount of each color material according to the added black component are often performed. FIG. 16 (a) shows the circuit configuration of masking, smearing, and UCR. The characteristic of this configuration is that there are two masking matrix systems, and there is a UCR that can switch at high speed with "1/0" of one signal line. One signal line is "1/0" with and without UCR. There are two circuits that determine the amount of Sumi that can be switched at high speed with, and it is possible to switch at high speed with "1/0". First, before reading an image, a desired first matrix coefficient M ₁ and a desired second matrix coefficient M ₂ are set.
Set from the bus connected to CPU22. In this example However, M ₁ is set in the registers 87 to 95, and M ₂ is set in the registers 96 to 104. Further, 111 to 122, 135, and 131 are selectors, respectively, which select A when the S terminal = "1" and B when the S terminal is "0".
Select. Therefore, when the matrix M ₁ is selected, the switching signal MAREA564 is set to “1”, and when the matrix M ₂ is selected, it is set to “0”. Reference numeral 123 is a selector, and outputs a, b, and c are obtained by the selection signals C ₀ and C ₁ (566, 567) based on the truth table of FIG. 16 (b). Selection signal 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,) as a monochrome signal.
By setting 1), a desired color-corrected color signal is obtained.
Now (C ₀ , C ₁ , C ₂ ) = (0, 0, 0), and MARE
When A = “1”, output of selector 123 (a, b, c)
Contains the contents of registers 87, 88 and 89, and therefore (a _Y1 , −
b _M1 , -c _C1 ) is output. On the other hand, input signals Yi, Mi, Ci
The black component signal 574 calculated as Min (Yi, Mi, Ci) = k is subjected to the linear transformation of Y = ax−b (a and b are constants) at 134, and the subtractor 124 (passes the selector 135). , 125, 1
It is input to the B input of 26. In each of the subtractors 124 to 126, Y = Yi− (ak−b) and M = Mi− (ak−
b), C = Ci− (ak−b) is calculated, and signal lines 577 and 57
Multipliers 127, 12 for masking operation via 8, 579
Input to 8,129. Selector 135 is controlled by signal UAREA565, which is UCR (under color removal),
The configuration is such that it can be switched at high speed with "1/0". The multipliers 127, 128 and 129 have (a _Y1 , -b _M1 , -c _C1 ) for the A input and the above-mentioned [Yi for the B input, respectively].
-(Ak-b), Mi- (ak-b), Ci- (ak-b)] =
As [Yi, Mi, Ci] is input, it is clear from the figure that the output Dout is Y under the condition of C ₂ = 0 (YorMorC selection).
_{out = Yi × (a Y1)} + Mi × (-b M1) + Ci × (-c C1) is obtained, the masking color correction, the yellow image data processed under color removal 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 developing order of the color printer (C ₀ , C ₁ , C ₂ ) according to the table of FIG. 16 (b). Registers 105 to 107 and 108 to 110 are registers for forming a monochrome image, and are obtained by weighted addition to each color by MONO = k ₁ Yi + l ₁ Mi + m ₁ Ci according to the same principle as the masking color correction described above. Switching signal MAREA564, UAREA5
65 and KAREA587 are high-speed switching of the masking color correction coefficient matrices M ₁ and M ₂ as described above, and UAREA565 is UC
High-speed switching with and without R, KAREA587 is a black component signal (output to Dout through signal line 569 → selector 131),
It 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 with respect to the primary conversion switching, that is, K = Min (Yi, Mi, Ci). Therefore, for example, the masking coefficient can be changed for each area in one copy screen, and the UCR amount or the smear amount 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 the area signals MAREA, U
AREA and KAREA (564, 565, 587) are generated by the area generation circuit (FIG. 51 in FIG. 2) described later.

Figure 17 shows the area signal generation (MAREA564, UAREA565,
(KAREA587 etc.) is a diagram for explaining. The area refers to, for example, a shaded area in FIG. 17 (e), which is a line of the timing chart AREA in FIG. 17 (e) for each line in the sub-operation direction A → B section. It is distinguished from other areas by a different signal. Each area is designated by the digitizer 16 in FIG. First
17 (a) to 17 (d) 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)
If EA0 and AREAn are obtained, the RAM address x ₁ ,
make a "1" in bit 0 of x _3, to all bit 0 of the rest of the address is "0". On the other hand, RAM address 1,
make a "1" to _{x 1, x 2, x 4} , to all bit n of other addresses "0". When the RAM data is sequentially read out in synchronism with a certain clock with HSYNC as a reference, for example, as shown in FIG. 17 (c), the data "1" is read out at the points of the addresses x ₁ and x _3. . The read data is 148-0 to 148- in FIG. 17 (d).
Since the J and K terminals of the J-K flip-flop of n are input, the output is a toggle operation, that is, when CLK in which "1" is read from the RAM is input, the output "0" → "1",
It changes from "1" to "0", and an interval signal such as 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 the circuit configuration,
Reference numerals 136 and 137 are the RAMs described above. In order to switch the area section at high speed, for example, while reading data from RAMA136 for each line, CPU22 (Fig. 2) performs a memory write operation for different area setting to CPU22 (Fig. 2). By doing so, alternating sections are generated and CP
Switch memory writing from U. Therefore, if the hatched area in FIG. 17 (f) is specified, A → B → A → B → A
RAMA and RAMB are switched as shown in Fig. 17 (d).
In (C ₃ , C ₄ , C ₅ ) = (0, 1, 0), the counter output counted by VCLK is given as an address to the RAMA 136 through the selector 139 (Aa),
The gate 142 is opened and the gate 144 is closed, and the data is read from the RAMA 136. The full bit width and n bits are JK flip-flop.
AR input to 148-0 to 148-n according to the set value
The interval signal from EA0 to AREAn is generated. During the writing from the CPU to B, the address bus A-Bus and data bus D
-Bus and access signal /. RAMB1 on the contrary
When section signals are generated based on the data set in 37, (C ₃ , C ₄ , C ₅ ) = (1, 0, 1), the same operation is performed, and the data from CPU to RAMA136 Can write. (Hereafter, these two RAMs will be referred to as A-RAM,
B-RAM, C ₃ , C ₄ and C ₅ are called AREA control signals (ARCNT) ... C ₃ , C ₄ and C ₅ are output from the I / O port of the CPU). 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, 15
0, 151 averages in units of 8 pixels, one of which is an adder 155
(Yi + Mi + Ci) is calculated at the B input of the dividers 152, 153, 154, and the other at the A input. , Cyan ratio rac = Ci / Yi + Mi +
Ci is obtained as signal lines 604, 605, and 606, respectively, and is 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, therefore, the ratio is included between (yu, mu, cu) and (yl, ml, cl), that is, yl when ≦ ra _{y <y u,} output = "1", when _{m l ≦ ra m <m u} , output = "1", C
_{When l} ≤ ra _c <c _u , output = "1", and when the above three conditions are met, the input color is judged to be the desired color, and 3 inputs are made.
The output of the AND 165 becomes 1 and is input to the S ₀ input of the selector 175. The adder 155 outputs when the signal line CHGCNT607 output from the I / O port of the CPU 22 is "1". When “0”, the output 603 = 1 is output. Therefore, when it is "0", the A inputs are output as they are from the dividers 152, 153 and 154. That is, at this time, not the desired color component ratio but the color density data is set in the registers 159 to 164. Reference numeral 175 is a selector with four inputs and one output, and the desired color data after conversion is input to inputs 1, 2 and 3 as Y component, M component and C component, respectively, while 4
For masking color correction, U
The data Vin that has been subjected to CR is input, and D in FIG. 16 (a) is input.
Connected to out. The switching input S ₀ is “true” when the color detection is “true”, that is, “1” when a predetermined color is detected, and “0” at other times, and S ₁ is the area generation circuit of FIG. 17 (d). The generated area signal CHAREA ^o 615 results in "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 and C ₁ signals in FIG. 16 (a), and (C ₀ , C ₁ ) = (0,0), (0,
When 1) and (1, 0), yellow image formation, magenta image formation, and cyan image formation are performed by the color printer, respectively. The truth table of the selector 175 is shown in FIG. 18 (b). The registers 166 to 168 set desired color component ratios after conversion or color component density data from the CPU. y ',
When m ′ and c ′ are color component ratios, CHGCNT607 is set to “1”, so the output 603 of the adder 155 is (Yi + Mi + Ci).
Therefore, since they are input to the B inputs of the multipliers 169 to 171, (Yi + Mi + Ci) × y ′, (Yi + Mi + Ci) × m ′, (Yi + Mi + Ci) × c ′ are input to the selector inputs 1, 2 and 3, respectively. Color conversion is performed according to the truth table FIG. 18 (b). On the other hand, when y ′, m ′, and c ′ are color component density data, CHGCNT = “0” is set, the signal 603 = “1”, the outputs of the multipliers 169 to 171 and thus the inputs 1, 2 of the selector 175, Data (y ', m', c ') is directly input to 3 and color conversion is performed by replacing the color component density data. Since the area signal CHAREA ^o 615 can arbitrarily set the section length and number as described above, this color conversion is applied only to a plurality of areas r ₁ , r ₂ and r ₃ as shown in FIG. 18 (d). Alternatively, by preparing a plurality of circuits in FIG. 18 (a), for example, the region r ₁ is red → blue, the r ₂ is red → yellow, and the r ₃ is white →
Color conversion over multiple areas such as red and multiple colors is also possible in real time at high speed. This is provided with a plurality of the same color detection → conversion circuits as the circuit described above, and the selector 230 selects the necessary data from the outputs A, B, C, D of each circuit by CHSEL0, CHSEL1 and outputs 619 to the output 619. Is output. In addition, the area signal applied to each circuit is CHAR
EA0 to 3 and CHSEL0 and 1 are also generated by the area generation circuit 51 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 RAM 177 for LUT, by setting the selection signal line RAMSL623 to “0”, the B input is selected in the selector 176, the gate 178 is closed and the 179 is opened, and the buses ABUS and DBUS from the CPU 22 are output. The (address data) is connected to the RAM 177 to write or read data. After the conversion table is created once, RAMSL623 = "1", the video input from Din620 is input to the address input of RAM177, is addressed by the video data, the desired data is output from RAM and the opened gate 178 is opened. Then, it is input to the scaling control circuit of the next stage. This gamma RAM has five types, yellow, magenta, cyan, black, and MONO, and at least two types (A and B in FIG. 19 (b)).
GARA generated by C ₀ , C ₁ , C ₂ (566, 567, 568) as in the figure and generated by the area generation circuit FIG.
With the 626, 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, which has variable characteristics of two types A and B, can be switched at high speed in each area, but it is possible to switch even 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, if the operator touches the density adjustment key e or f on P000 (standard screen) in FIG. 33, and touches 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 (RA
M177) has been rewritten and the density can be adjusted without changing the color tone. On the other hand, in the screen of P420 in FIG. 37 (in the <color create> mode, color balance adjustment), only the area inside the RAM 177 is individually rewritten for each of Y, M, C and Bk in order to adjust the color balance. That is, for example, pressing the case intra P420 Tatsuchiki y ₁ to change the color tone of the yellow component, the black strip display extends upwardly, conversion characteristics y ₁ direction as in the Fig. 19 (f) -Y, therefore Yellow When the touch key y ₂ is touched, the component becomes thicker, and the characteristic is selected in the y ₂ direction, and the yellow component becomes thinner. 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.

20 (a) 180 and 181 are 16 × 297 = 4 each in the main scanning direction for one line, eg 16 pel / mm, A4 longitudinal width 297 mm.
This is a FiFo memory with a capacity of 752 pixels, and as shown in FIG. 20 (b), a write operation to the memory is performed while = “Lo”, a section read operation of = “Lo”, and a “Hi” Output of A when = "Hi"
At that time, the output of B is in a high impedance state, so that the respective outputs are wired-ORed and output as Dout627. FiFoA, FiFoB180, 181 are inside
WCK and RCK (clock) write address counter Read address counter (The internal pointer advances according to Fig. 20 (c), so that WCK video in the system, as is usually done CL with data transfer clock VCLK588 decimated by rate multiplier 630
It is well known that if K is given and RCK is given CLK that does not decimate VCLK588, the input data to this circuit is reduced at the time of output, and vice versa. The actions are alternated. Furthermore, FiFo memory 18
The W address counter 182 and the R address counter 183 in the 0, 181, are counted by the clock only during the period in which the enable signals (WE, RE ... 635, 636) are in the enable "Lo", and the RST (634) = "Lo" Since the configuration is initialized, for example, as shown in FIG. 20 (d), after RST (this configuration uses a synchronization signal in the main scanning direction), only n pixels from the n _1st pixel = “Lo” (
Writing pixel data in the same), when the n ₂ th pixel m pixels only = "Lo" (in the same) reads the pixel data, to move like a figure ERITE data → READ data. That is, by varying the occurrence positions and sections of (and) and (and) in this way, the image is arbitrarily moved in the main scanning direction as shown in FIGS. 20 (e), (f) and (g), and By combining with the aforementioned WCK or RCK decimation, 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, variable magnification control is performed in the main scanning direction as necessary, and then in FIG. 21, edge coordination and smoothing processing are performed. 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
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.
When the CPU 22 sets “15” and 3 × 7 smoothing is selected, the CPU 22 sets “21” and averages.

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.
The conversion characteristics of the gain circuit are shown in Fig. 21 (c) as the operator operates 1, 2, 3 and 4 in the direction of <Sharpness> on the screen of Fig. 2 (d) (P430 in Fig. 2-7). Like, CP
Rewritten by U22. On the other hand, when the operator operates 1 ', 2', 3 ', 4'in the direction of <sheepness>, the switching signal SMSL652 of the selector 197 causes
Block size for smoothing is 3 × 3,3 × 5,3 ×
It is selected to be as large as 7 or 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. By controlling the EAREA651 and SMSL652 generated in Fig. (D), for example, 3x5 smoothing is selected by SMSL652, and EAREA651 is generated like A ', B'as shown in Fig. 21 (e). When applied to the original of dot and character, the moire is improved for the dot image and the sharpness is improved for the character area. The signal TMAREA660 is generated by the area generation circuit 51 like EAREA651, and output when TMAREA = "1".
When Dout = "A + B" and 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, the shaded portion (inside the rectangle) is extracted and a signal like that shown in FIG.21 (g) 660-2 is generated. Then, the shaded portion (outside the rectangle) is extracted (white).

FIG. 5 is a manuscript coordinate recognition circuit 200 for recognizing the coordinates of the four corners of the manuscript placed on the manuscript 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 coefficient shown in FIG. 16 (a) is k ₁ ,
Selects _{1 1} and m ₁ for monochrome image data generation, C ₀ , C ₁ and C ₂ in the figure are ( ₀ , ₁ , ₁ ), and UCR (undercolor removal) is not performed UAREA565 = “Lo” As a result, 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
The I / O for controlling the liquid crystal controller 201 shown in FIG. 22 and the key matrix 209 for key input and touch key input
This operation panel is controlled by a command given to the port 206. 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 input is controlled by the I / O port 206, and the key pressed by the normally-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.
PJO from the I / O port of the CPU 22 (Fig. 2) in the controller 13 so that ON / OFF and lighting voltage can be controlled by
N655 and PJCNT657 are output. Lamp controller 212
The lamp lighting voltage is determined by the value of the input PJCNT657 of 8 bits as shown in FIG. 24, and is usually controlled between Vmin and Vmax. At this time, the input digital data is D _A ~ D _B
Is. Fig. 25 (a) is an operation flow for reading an image from the film projector and copying, Fig. 25 (b).
An outline of the timing chart is shown in. At S1, the operator sets the film 216 on the film projector 211, and the lamp lighting voltage Vexp is set by the shading correction (S2) and AE (S3) described below according to the operation procedure from the operation panel described later.
And start the printer 2 (S4). PJCNT = Dex prior to the ITOP (image leading edge synchronization signal) signal from the printer
As p (corresponding to appropriate exposure voltage), the amount of light is stable during image formation. A Y image is formed by the ITPO signal, and is dark-lighted 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, thereby extending the life. . Similarly after that, M
After image formation, C image formation, and black image formation (S7 to S1
2) Turn off the lamp with PJCNT = "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 400 or more, and the shielding start button is pressed, the projector lamp is lit 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. In practice, the operator may automatically switch the reference lighting voltages V ₁ and V ₂ by recognizing the type of the film carrier if the operator selects the negative film or the positive film. Then, the scanner unit moves to the vicinity of the center of the image projection unit, and the average value of one CCD line or a plurality of CCD lines is taken into the RAM 78 'of FIG. 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 automatically turned on at V ₁ or V ₂ according to the selection result as to whether or not the color negative is described above, and the pre-scanning (AE) of the image projection unit is performed. Proskiyan 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, the R signals of a plurality of predetermined lines in the image projection area are input by the CCD, and the R signal pair appearance frequency is accumulated to create a histogram as shown in FIG. Histogram creation mode "). The maximum value shown in the figure is calculated from this histogram, the maximum and minimum R signal values Rmax and Rmin at which the histogram crosses the level of 1/16 of the maximum value, and the lamp light intensity according to the film type initially selected by the operator Calculate the multiple α. The value of α is α-255 / Rmax in the case of color or black and white positive film, and α = C in the case of negative black and white.
₁ / Rmin, for color negative with ASA sensitivity less than 400 α = C ₂
/ Rmin, ASA for color negative with sensitivity of 400 or more α = C ₃ /
Calculated as Rmin. C ₁ , C ₂ and C ₃ are values determined in advance by the gamma characteristic of the film, and are 255
The value is about 40 to 50 of the levels. The α value is converted into output data to the variable voltage power source of the projector lamp by a predetermined lookup table. Then, the projector lamp is lit by the lamp lighting voltage V thus obtained, and the logarithmic conversion table (FIG. 3A) and the masking coefficient
16 (a) is set to an appropriate value and a 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 a switching signal of 3 bits, 1 for a reflection original and 2 for a reflection original.
For color positive, 3 for black and white positive, 4 for color negative (AS
Less than A400), 5 for color negative (ASA400 or higher), 6 for black and white negative ... The contents are R,
Each of G and B can be set independently. Thirteenth
An example of table contents is shown in FIG.

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 step (a) in FIG. 29, 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.

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

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. (See (B) Fig. 800, 801) Output from latch
VIDEO DATA 815 is gradation corrected by LUT (Rookup Table) 901 composed of ROM or RAM, D / A (digital / analog) converter 902 is D / A converted, and one analog video signal is converted. The generated analog signal is input to the comparators 910 and 911 at the next stage and compared with a triangular wave described later. Signal 80 input to the other comparator
Reference numerals 8 and 809 denote triangular waves (808 in FIG. 808) generated individually and synchronized with VCLK. That is, VCLK80
A synchronous clock 2VCLK 803 having a frequency twice that of 1 is generated by a triangular wave generating circuit 908 in accordance with a triangular wave generating reference signal 806 obtained by dividing the synchronous clock 2VCLK 803 by 2 by a JK flip-flop 906. 6 with frequency divider 905
The triangular wave WV2 is generated by the triangular wave generation circuit 909 in accordance with the signal 807 ((B) FIG. 807) generated by frequency division. Each triangle wave and VIDEO DATA are all VC as shown in the same figure (B).
It is generated in synchronization with LK. In addition, each signal is HSYN inverted to synchronize with HSYNC802 which is generated in synchronization with VCLK.
C initializes 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, the laser is turned on when the output of the AND gate 913 of FIG. (A) is "1", dots are printed on the print paper, the laser is turned off when "0", 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. In contrast, the triangular wave is WV1 in (a),
In (b), the pulse width becomes WV2, so that the pulse widths of the outputs of CMP1 and CNP2 become narrower as they shift from "black" to "white" like PW1 and PW2, respectively. Further, as is clear from the figure, when PW1 is selected, the dots on the print paper are formed at intervals of P ₁ → P ₂ → P ₃ → P ₄ , and the variation amount of the pulse width has the dynamic range of W1. On the other hand, PW2
When is selected, dots are formed at intervals of P ₅ → P ₆ , the dynamic range of pulse width is W2, and each is 3 compared to PW1.
Is doubled. By the way, for example, print density (resolution)
Is set to about 400 lines / inch for PW1 and about 133 lines / inch for PW2. Also, as is clear from this, when PW1 is selected, the resolution is about 3 times better than when PW2 is used, while PW2
When is selected, the dynamic range of the pulse width is about 3 times wider than that of PW1, so the gradation is remarkably improved. Therefore, for example, PW1 should be selected when high resolution is required, and PW2 should be selected when high gradation is required.
SEL804 is given. That is, 912 in the figure (A) is a selector, and when SCRSEL804 is "0", A input selection, that is, PW1
However, when it is "1", PW2 is output from the output terminal, the laser is turned on for the pulse width finally obtained, and the dot is printed. Although the CUT 901 is a table conversion ROM for gradation correction, K ₁ , K _{2 at} addresses 812 and 813, a table switching signal at 814, and a video signal at 815 are input, and corrected VIDEO DATA is obtained from the output. For example SCR to select PW1
When SEL84 is set to "0", the output of the ternary counter 903 becomes all "0", and the correction table for PW1 in 901 is selected. Further, K ₀ , K ₁ and K ₂ are switched according to the output color signal, and for example, K ₀ , K ₁ and K ₂ = “0, 0,
When it is "0", it is yellow output, when it is "0,1,0", it is magenta output, when it is "1,0,0", it is cyan output, and it is "1,1,0".
At the time of black 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, it is possible to perform gradation correction in a wider range by combining K ₂ and K ₀ , K ₁ . 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 sync signal of the line, 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. A curve A in FIG. 9A is a characteristic curve of input data versus print density when PW1 is selected and the input data is changed from "FF" or "white" to "0" or "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. The same figure (B) shows PW
Gradation correction characteristics A, B, for each line when 2 is selected
C, the pulse width in the main scanning direction (laser scan direction) is varied by the above-mentioned triangular wave, and at the same time, three levels of gradation are provided in the sub-scanning direction (image sending direction) as shown in FIG. Improve the 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, the pulse width W is ideally 0 ≦ W ≦ W2, but due to the electrophotographic characteristics of the laser beam printer and the response characteristics of the laser drive circuit, a certain width There is a region in which dots are not printed (no response) with a shorter pulse width (Fig. 28, 0 ≤ W ≤ wp) and a region in which 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, data 0 (black) to FFH (white) input as shown in FIG. 28 (B).
The pulse width changes from wp to wq when it changes to, 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.

Note that the signals K ₀ , K ₁ , K ₂ , SCRSEL, in FIG.
LON is output from a control circuit (not shown) in the printer controller 700 shown in FIG. 2, and is output based on serial communication with the reader unit 1 (described above).
"0", SCRSEL = "1" when using the film projector
Control, and a smoother gradation is reproduced.

[Image forming operation]

Now, the laser light LB modulated corresponding to the image data
Is scanned horizontally at a high speed by a polygon mirror 712 which rotates at a high speed within a width of an arrow AB in FIG.
And an image on the surface of the photosensitive drum 715 through the mirror 714,
Dot exposure corresponding to the image data is performed. One horizontal scan of the laser light corresponds to one horizontal scan 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. From the uniform charging by the charger 717 prior to this exposure → the above-described exposure → and the toner development by the developing sleeve 731, toner development is formed. 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 the 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 the setting of each mode by the touch panel key and the state of the printer 2. 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 the projector mode 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, 42
3, 424, 425, 426, and 427 are entry keys for setting each mode described later, and the coordinate detection plate 420 is for detecting a coordinate position for designating an arbitrary area on the document or setting a magnification. It is a plate, and the point pen 421 specifies its coordinates. 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 even 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. The black striped display at the top of the screen shows the status of each mode currently set,
You can check the operation mistakes and settings. 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. Auto-zoom scaling mode M120 is a mode that automatically calculates and copies an appropriate scaling ratio according to the original and the selected paper size. In addition, XY independent automatic scaling, XY same-rate automatic scaling, X-auto scaling, Four types of Y auto scaling can be specified. In the XY independent automatic scaling, the magnification in the X direction and the Y direction are automatically set independently so that the original size or the paper size selected for the designated area on the original is obtained. In XY same-rate automatic scaling, both XY are scaled and printed at the magnification with the smaller result of the calculation of XY independent automatic scaling. 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 setting 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, when specifying the above-mentioned four types of auto zoom, XY independent auto scaling, XY same ratio P auto scaling, X auto scaling, and Y auto scaling, touch keys b and C, touch key d, and 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 M2
The mode 10 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 paper. 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 so as 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 or more areas on the original can be designated, and any one of three modes of trimming mode M310, masking mode M320 and 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. Further, the image separation mode M330 further includes a color mode M331, a color conversion mode M332, and a paint mode M3.
It is possible to select any of 33 and color balance mode M334. In color mode M331, 4 full colors, 3 full colors Y, M, C, B within the specified area
You can select any color mode from among 9 types: k, RED, GREEN, and BLUE. The color conversion mode M332 is a mode in which a predetermined portion having a certain density range is replaced with another arbitrary color in the designated area and 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. At this time, if the designation is trimming or masking, 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, and 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. If you want to select the converted color from the standard colors, press the touch key a on screen P370 and
Yellow, magenta, cyan, black, red, displayed on P390
Specify one of seven colors, green and blue, 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, there is of course a request to make the density of the specified color a little lighter or darker, and therefore the density specification key in the center of the screen P390 can be pressed to perform color conversion at the desired density.

Next, when touch key c (specify 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 to display 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 the 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 designation mode M300, the color mode M331,
The difference from the color conversion mode M332, paint mode M333, color balance mode M334 is 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 will be omitted.

The sharpness mode 440 is a mode for adjusting the sharpness of an image, and is a mode for adjusting the edge of a so-called character image or the ratio of 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 P430 is displayed, and the sharpness of 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. If you press the weak touch key h,
The smoothing of the peripheral pixels is performed, the amount of so-called smoothing is increased, and settings can be made so that moire and the like at halftone dot originals 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 inset compositing mode> In the inline compositing mode M6, the specified color image area is designated as the monochrome image area (or the color image area may be specified) for the original document such as E and F in FIG. In this mode, 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 set area is acceptable, 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. If the 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 destination area, it is fitted according to the destination area, and when it is smaller, 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 pasting these multiple copies together, it is possible to easily make a copy larger than the specified 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. The zoom program mode M720 is a mode in which the magnification is calculated automatically by inputting the size of the original and the length of the copy paper size, and the resulting magnification is displayed on the standard screen P000, after which it is copied at that magnification. Is. In the manual copy size specification mode M730, in this color copying machine, in addition to the upper and lower cassettes, manual copying is possible. It is a mode that can.

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 710, the stepping motor movement pulse number is calculated from the above-specified coordinates (sub-scanning direction), and the original scanning unit 11 is moved by issuing the 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, when the projector mode selection key shown in FIG. 31 is turned on, the display on the liquid crystal touch panel changes 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 shown in FIG. 29, by setting the negative base film and turning on the P820 shaded start key, the shade correction is performed, and then the negative film to be printed is set in the holder 215. Then, by turning on the copy button (400 in FIG. 31), the AE operation for determining the exposure voltage is performed, and then as shown in FIG. 25 (a), image formation is performed in the order of yellow, magenta, cyan, and Bk (black). Repeat.

FIG. 46 is a flow chart of sequence control of this color copying apparatus. A flow chart will be described below. 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 it is recognized, 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 The MODE stores the identification 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 The AlPT stores information after color conversion and information of standard color, designated color or 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 the information area of the color coordinates before conversion in the color conversion mode. The CLMD stores the color mode information of the original or the designated area.

Also REGI COLOR stores each color information registered in the color registration mode and uses it 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, the AREA that stores the size information of each area in Fig. 49. From XY, from the coordinate data in the sub-scanning direction, the smallest value is X Sorting into the ADD area,
The main scanning direction is similarly sorted.

Next, the BIT at the start and end points of each area in the main scanning direction "1" is set at the MAP position, and the process is similarly performed up to the end point coordinate of the sub-scan. At this time, the bit position for setting "1" is RAMA136 or RAMB1.
Corresponding to each gate signal generated from 37, 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. Similarly, the bit map for the area is shown below in BIT in Fig. 50. Create in the MAP area. Then S109 At 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, when the designated area is selected in the single color mode, the masking coefficient register in Fig. 16 (a) shows the following coefficient in the register selected when MAREA564 becomes active so that it becomes an ND image image. To set.

Next, the data (used in the four-color or three-color mode) stored in the RAM 23 of FIG. 2 is set in the masking coefficient register selected by MAREA564 as "0". Next, for the area 2 which is the paint mode, the BI described above is used.
Each gate signal CH corresponding to the bit in the IMAP area
Data is set in each register of FIG. 18 (a) selected by AREA0, 1, 2, 3. First, to convert all input video, FF to _yu 159, 00 to y _l 160, _mu 161
FF, _ml 162 to 00, _Cu 163 to FF, C _l 164 to 00,
The color information after conversion stored in FIG. 49 is stored in AREA. ALPT or REGI Load from COLOR and AREA for each color data D
Multiply the ENC concentration adjustment data coefficient to obtain y'166,
The density data after conversion is set in m'167 and c'168.

For the color conversion of area 4, yu159, ...
To each of the 64 registers, each density data before conversion shown in FIG. 49, to which a certain offset value has been added, is set (see the color before conversion designated by the conversion color designating means of the present invention as shown in FIG. ) Each color component data (Yi, Mi, Ci)
It is equivalent to setting to determine by the color conversion means) that the converted data is similarly set (the color before conversion of the present invention is changed to the target color specified by the target color position specifying means). This is equivalent to setting the registers 166, 167 and 168 of FIG. 18 (a) for conversion by the conversion means).
In the color balance of the area 5, in the areas of Y, M, C and Bk of the RAM 177 selected by the gate signal GAREA626 by "1", the color balance value AREA when the area is designated in FIG. 49 is specified. BLA
The data value described above is set from N, and the data is set in 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. ITOP is detected, the output video signals C ₀ , C ₁ and C ₂ of Y, M, C and Bk are switched in S111, and the halogen lamp is turned on in S112. Judge the end of each video scan in S113,
When finished, turn off the halogen lamp in S114, and
Check the copy end in S115, and if it is finished, S1
At 16, the stop command is output to the printer and the copy ends.

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. In S200, as shown in Figure 50 above, X One line BIT indicated by ADD M
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.
Switching signal S202 in _{RAM136, RAM137 C 3 595, C} 4 596,
C ₅ 593 is output, and in S203, the time until the next sub-scanning switching is set in the timer 28. BIT indicated by ADD The contents of MAM are sequentially set in the RAM 136 or RAM 137 and the gate signal is switched.

That is, each time the carriage moves in the sub-scanning direction and an interrupt occurs, the processing content in the X direction is switched, and various color processing such as color conversion can be executed 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, the color image forming apparatus using electrophotography has been described as an example, but various recording methods such as ink jet recording, thermal transfer recording and the like can be applied without being limited to electrophotography. 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.

As described above, according to the present invention, when the color represented by the read image data is determined to be the color before conversion designated by the conversion color designating means, the color before conversion is on the original stored in the storage means. Since the target color after conversion, which is the color at the specified position, is converted, the desired color is stored in memory in multiple ways in advance, and the position specified on the original is compared to the color to be converted to the selected color. It is possible to convert and output the color other than the fixed color stored in the memory, and it is possible to convert the color on the original without actually outputting the color after the color conversion. By performing the conversion as the target color, it becomes possible for the user to perform heavy color conversion. Further, since the pre-scan for reading the target color after the color conversion and the original scan for performing the actual color conversion are performed by the same reading means, there is an effect that the circuit configuration is simplified.

[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, UCR circuit diagram, FIG. 16 (b) shows selection signals C ₀ , C
FIG. 17 (a), which shows the relationship between ₁ , C ₂ and the color signal.
(B), (c), (d), (e), (f), and (g) are explanatory views of area signal generation, and FIGS. 18 (a), (b), (c),
(D) and (e) are explanatory views of color conversion, and FIG. 19 (a),
(B), (c), (d), (e), (f) are explanatory views of gamma conversion for color balance and color shading control, FIGS. 20 (a), (b), (c), (D), (e), (f),
(G) is an explanatory view of the scaling control, and FIGS. 21 (a), (b),
(C), (d), (e), (f), and (g) are explanatory views of the edge enhancement and smoothing processing, FIG. 22 is a control circuit diagram of the operation panel unit, and FIG. 23 is a film projector. Structure diagram, FIG. 24 is a diagram showing the relationship between the control input of the film exposure lamp and the lighting voltage, FIGS. 25 (a), (b), and (c) are explanatory diagrams when the film projector is used, and FIG. 26 ( A),
(B) and (C) are explanatory views of the PWM circuit and its operation,
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.

Front page continuation (72) Inventor Tetsuya Onishi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) Reference JP-A-57-202176 (JP, A) JP-A-60-91770 ( JP, A)

Claims (1)

[Claims] 1. A conversion color designating means for designating an arbitrary color to be converted as a color before conversion, by designating an arbitrary position on the original so that the color at the designated position on the original is converted. Target color position designating means for designating as a target color, reading means for pre-scanning the original and reading the converted target color at the position designated by the target color position designating means, after conversion by the reading means A storage unit that stores a target color, and an output unit that causes the reading unit to scan the original again and output according to the read image data, wherein the output unit has a color represented by the read image data as the conversion color designating unit. When it is determined that the color is the one before conversion, which is designated by, the color represented by the read image data is converted into the target color after conversion stored in the storage means. A color image processing device comprising a converting means for outputting.