JPH104494A - Picture processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain convenient operation environment by interactively setting a color processing method and processing an image based on the set color processing method. SOLUTION: An original is placed on a digitizer and an area is designated by a point pen. One of trimming, masking and image separation in the designated area, which are displayed in a screen P320 is selected and a key is depressed. At this time, when designation is trimming or masking, the touch key (a) of the screen P320 is depressed and progress is executed to the succeeding area. When image separation is selected in the screen 320, progress is executed to the screen P330 so as to select one of color conversion, painting, a color mode and color balance. When the touch key (b) for designating color conversion is depressed in the screen P330, display is progressed to the screen P340 so that a point having chrominance information desired to be converted inside the designated area is designated by pointing. Then, in the screen P370, one of a standard color, a designated color, a register color and white is designated in the screen where color is designated after conversion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a color conversion method and an image processing method.

[0002]

2. Description of the Related Art A conventional color conversion method involves printing three color signals of yellow, magenta, and cyan as input color signals in other colors that do not correspond to each signal, and creating an image of a color different from the input image. Was something. For example, by printing magenta with a yellow signal, cyan with a magenta signal, and yellow with a cyan signal, the red portion of yellow + magenta is blue of magenta + cyan, and the blue portion of magenta + cyan is cyan + yellow. In green, cyan + yellow green portions were reproduced in yellow + magenta red.

However, in such a method, all colors other than the single color of yellow, magenta, and cyan are reproduced in colors different from the input image, and therefore only the specific color portion of the input image is switched to another color. It was impossible to output.

In order to solve the above-mentioned problems, in recent color conversion processing, an area is designated by using a pointing device and color conversion processing is performed only on the designated area, or a specific color in an input image is determined. A function of performing color conversion of only the determined specific color is being developed.

[0005]

However, with the function UP of the color conversion processing, an operation method for performing a desired processing is complicated.

As a result, if the above-described color conversion is introduced into a printing machine used only by a specialist, it is not always easy to use for a general user who is not used when the color conversion is used in a copying machine operated by a general user. However, there was room for improvement in the operating environment.

[0007]

According to the present invention, a color processing setting mode for setting color processing in accordance with an instruction on a display is selected according to the present invention, and based on the selection, a color processing setting mode is selected on the display. The color processing method is set interactively according to the instruction, and image processing is performed based on the set color processing method.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below 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 drawing, the present system has a digital color image reading device (hereinafter, referred to as a color reader) 1 at an upper part and a digital color image printing device (hereinafter, a color printer) 2 at a lower part. The color reader 1 reads color image information of a document for each color by a later-described color separation unit and a photoelectric conversion element such as a CCD, and converts it into an electric digital image signal. The color printer 2 is an electrophotographic laser beam color printer that reproduces a color image for each color in accordance with the digital image signal, and transfers the color image to a recording sheet in a digital dot form a plurality of times and records it.

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

Reference numeral 3 denotes an original, reference numeral 4 denotes a platen glass on which the original is placed, and reference numeral 5 denotes a condenser for condensing a reflected light image from the original exposed and scanned by a halogen exposure lamp 10 and inputting the image to a 1: 1 full-color sensor 6. Rod array lens,
5, 6, 7, and 10 perform exposure scanning in the direction of arrow A1 integrally as the document scanning unit 11. The color separation image signal read line by line while exposing and scanning is amplified to a predetermined voltage by the sensor output signal amplification circuit 7 and then input to a video processing unit to be described later via a signal line 501 for signal processing. Details will be described later. Reference numeral 501 denotes a coaxial cable for ensuring faithful transmission of a signal. A signal 502 is a signal line for supplying a drive pulse for the 1: 1 full-color sensor 6. All necessary drive pulses are generated in the video processing unit 12. Numerals 8 and 9 denote a white plate and a black plate for white level correction and black level correction of an image signal, which will be described later. Used for white level correction and black level correction of signals. Reference numeral 13 denotes a control unit having a microcomputer, which controls the display on the operation panel 20, key input control and the video processing unit 12 by the bus 508, and the position of the document scanning unit 11 by the position sensors S1 and S2. Control via a stepping motor drive circuit for pulse driving the stepping motor 14 for detecting and detecting via the signal line 503 and moving the scanning body 11 via the signal line 503, and turning on / off the halogen exposure lamp 10 by the exposure lamp driver via the signal line 504 All controls of the color reader unit 1, such as control, light amount control, and control of the digitizer 16 and internal keys via the signal line 505 and the display unit are performed. A 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 amplification circuit 7 and the signal line 501, and subjected to various processes described later in this unit 12. The data is sent to the printer unit 2 via the interface circuit 56.

Next, an outline of the color printer 2 will be described. Reference numeral 711 denotes a scanner, which is a laser output unit for converting an image signal from the color reader 1 into an optical signal, a polygon mirror 712 of a polyhedron (for example, octahedron), and the mirror 71
2 has a motor (not shown) for rotating the lens 2 and an f / θ lens (image-defining lens) 713. 714 is a reflection mirror for changing the optical path of the laser beam, and 715 is a photosensitive drum. The laser light emitted from the laser output unit is reflected by the polygon mirror 712, and is reflected by the lens 713 and the mirror 714.
Scans the surface of the photosensitive drum 715 linearly (raster scan) to form a latent image corresponding to the document image.

Reference numeral 717 is a primary charger, 718 is an overall exposure lamp, 723 is a cleaner unit for collecting residual toner not transferred, and a pre-transfer charger, and these members are disposed around the photosensitive drum 715. Have been.

Reference numeral 726 denotes a developing unit for developing an electrostatic latent image formed on the surface of the photosensitive drum 715 by laser exposure, and includes 731Y, 731M, 731C, 731
Bk is a developing sleeve that directly performs development in contact with the photosensitive drum 715, 730Y, 730M, 730C, and 730Bk are toner hoppers that hold spare toner, and 732 is a screw that transfers developer, and these sleeves 730Y ~ 730Bk, toner hopper 730Y ~ 7
The developing unit 726 is constituted by 30Bk and the screw 732, and these members are disposed 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 this figure. Body 7
The developing sleeve 7 in the magenta developing device
13M is provided. The development of cyan and black operates similarly.

Reference numeral 716 denotes a transfer drum for transferring the toner image formed on the photosensitive drum 715 onto paper.
Reference numeral 19 denotes an actuator plate for detecting the movement position of the transfer drum 716, and 720 denotes the actuator plate 719
A position sensor for detecting that the transfer drum 716 has moved to the home position position due to the proximity of
25 is a transfer drum cleaner, 727 is a paper press roller,
Reference numeral 728 denotes a static eliminator, and 729 denotes a transfer charger. These members 719, 720, 725, 727, and 729 are disposed around the transfer roller 716.

On the other hand, 735 and 736 are paper feed cassettes for storing sheets (sheets), and 737 and 738 are cassettes 73.
Paper feed rollers for feeding paper from 5, 736, 739, 7
Reference numerals 40 and 741 denote timing rollers for setting the timing of sheet feeding and conveyance. The sheet fed and conveyed via these rollers is guided by a paper guide 749 and wrapped around the transfer drum 716 while the leading end is held by a gripper described later. Then, the process proceeds to the image forming process.

A drum rotation motor 550 rotates the photosensitive drum 715 and the transfer drum 716 synchronously. 75
Reference numeral 0 denotes a peeling claw that removes the paper from the transfer drum 716 after the image forming process is completed, 742 denotes a transport belt that transports the removed paper, and 743 denotes an image fixing unit that fixes the paper transported by the transport belt 742. Yes, image fixing unit 7
43 has a pair of thermal pressure rollers 744 and 745.

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

(Control Unit) The control unit includes a CPU 22, which is a microcomputer, and a lamp driver 2 for controlling video signal processing, exposing and scanning.
1. The control of the stepping motor driver 15, the digitizer 16, and the operation panel 20 is performed by a signal line 508, respectively.
(Bus), 504, 503, 505, etc. to obtain a desired copy.
Control organically according to M25. RAM 25 is battery 3
1 guarantees non-irritability. Reference numeral 505 denotes a generally used signal line for serial communication, which is input by an operator from the digitizer 16 according to a protocol between the CPU 22 and the digitizer 16. That is, reference numeral 505 denotes a signal line for inputting coordinates, an area instruction, a copy mode instruction, a magnification change instruction, and the like when editing, for example, moving and synthesizing a document. A signal line 503 is a signal line for instructing the motor driver 15 on a scanning speed, a distance, a forward movement, a backward movement, and the like from the CPU 22. Input and give 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 have similar circuits. doing. The protocol of the interface between the CPU 22 and the motor driver 15 is shown in FIG.

S1 and S2 are sensors for detecting the position of the original exposure scanning unit (FIG. 111).
Is the home position position, and white level correction of the image signal is performed at this position. S2 is a sensor for detecting that there is a document exposure scanning unit at the leading end of the image,
This position is the reference position of the document.

(Printer Interface) Signals ITOP, BD, VCLK, VIDEO, HSY in FIG.
NC and SRCOM (511-516) are shown in FIG.
Is an interface signal between the color printer unit 2 and the reader unit 1. All the image signals VIDEO 514 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 feed direction (hereinafter, referred to as the sub-scanning direction), and is transmitted once for one screen, that is, four colors (yellow, magenta, cyan, and B).
The image transmission of k) occurs once each, for a total of four times. This is because the leading edge of the transfer paper wound on the transfer drum 716 of the color printer unit 2 is contacted with the photosensitive drum 715 to form the toner image. When receiving the transfer, the image is synchronized with the rotation of the transfer drum 716 and the photosensitive drum 715 so that the image at the leading end of the document coincides with the position of the image. (Signal 511). CPU22 is IT
Image control in the sub-scanning direction for editing or the like is performed based on the OP interrupt. BD512 is one of polygon mirrors 712
This is a synchronizing signal in a raster scan direction (hereinafter, referred to as a main scanning direction) generated once per rotation, that is, once per raster scan. An image signal read by the reader unit 1 is one line in the main scanning direction The data is sent to the printer unit 2 in synchronization with the BD. VCLK 513 is a synchronous clock for transmitting an 8-bit digital video signal 514 to the color printer unit 2. For example, as shown in FIG.
4 is sent. The HSYNC 515 is generated in synchronization with the VCLK 513 from the BD signal 512. This is a main scanning direction synchronizing signal, has the same cycle as BD, and has a VIDEO signal 5
Strictly speaking, 14 is sent out in synchronization with HSYNC 515. This is because the BD signal 515 is generated in synchronization with the rotation of the polygon mirror, so that a lot of jitter of the motor for rotating the polygon mirror 712 is included. Generated in synchronization with VCLK without jitter
This is because YNC515 is required. SRCOM is a signal line for half-duplex bidirectional serial communication.
As shown in (C), the synchronization signal C sent from the reader unit
The command CM is transmitted in synchronization with the 8-bit serial clock SCLK during BUSY (command busy), and the printer unit responds to this by sending SBUSY (status busy).
Status S in synchronization with the 8-bit serial clock between
T is returned. This timing chart shows that the status "3CH" is returned in response to the command "8EH". The exchange of information, such as no paper, weight, etc., is all performed via this communication line SRCOM.

FIG. 4A is a timing chart for transmitting one full-color four-color image based on ITOP and HSYNC. ITOP 511 is one of transfer drums 716
A rotation, or a yellow image generated once every two rotations,
In the example, the magenta image, the cyan image, and the Bk image data are transmitted from the reader unit 1 to the printer unit 2.
A four-color superimposed full-color image is formed on the transfer paper. HSYNC is, for example, 420 mm in the longitudinal direction of the A3 image and the image density in the feed direction is 16 pel / mm.
420 × 16 = 6720 times, and this is simultaneously input to the clock to the timer circuit 28 in the controller circuit 13, and after a predetermined number of counts, an interrupt HINT 517 is issued to the CPU 22. . Accordingly, the CPU 22 performs image control in the feed direction, for example, control such as extraction and movement.

(Video Processing Unit) Next, the video processing unit 12 will be described in detail with reference to FIG. The original is first illuminated by an exposure lamp 10 (FIGS. 1 and 2), and the reflected light is read out by color separation for each image by a color reading sensor 6 in a scanning unit 11 and amplified to a predetermined level by an amplification circuit 42. Is done. 41 is a CCD for supplying a pulse signal for driving a color reading sensor
The required pulse source, which is a driver, is generated by a system control pulse generator 57. FIG. 6 shows a color reading sensor and a driving pulse. FIG. 6A shows a color reading sensor used in this example, which is 62.5 μm (1/16
mm) as one pixel, since one pixel is divided into three in the main scanning direction by G, B, and R as shown in the figure, 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, and the first, third, and fifth sensors (58, 60,
62) is on the same line LA, and the second and fourth are
It is arranged on the line LB separated by the line (62.5 μm × 4 = 250 μm).
Scan in the direction. Each of the five CCDs has the first, third and fifth drive pulse groups ODRV 518, and the second and fourth CCDs have the ED
Driven independently and synchronously by RV 519. O01A, O02A included in ODRV518,
E01A, E02 included in ORS and EDRV519
A and ERS are a charge transfer clock and a charge reset pulse in each sensor, respectively.
Due to mutual interference with the fourth and noise limitations, they are generated completely synchronously so as not to be jittered with each other. Therefore, these pulses are generated from one reference oscillation source OSC 58 '(FIG. 5). FIG. 7A shows ODRV518 and EDRV51.
7 is a timing chart, and FIG. 7B is a timing chart, which is included in the system control pulse generator 57 in FIG. Clock K0535 obtained by dividing original clock OLK0 generated from single OSC 58 '
Is a clock for generating reference signals SYNC2 and SYNC3 for determining the generation timing of ODRV and EDRV.
YNC2 and SYNC3 are presettable counters 64 set by signal lines 539 connected to the CPU bus,
The output timing is determined according to the set value of 65, and SY
The NC2 and the SYNC3 initialize the frequency dividers 66 and 67 and the drive pulse generators 68 and 69. In other words, the ODRV is generated based on the HSYNC 515 input to this block as a reference and the CLK0 output from one oscillation source OSC and the frequency-divided clock generated in synchronization with each other.
Each of the pulse groups 518 and EDRV 519 is obtained as a synchronized signal without any jitter, and signal disturbance due to interference between sensors can be prevented. Here, the sensor drive pulse ODRV518 obtained in synchronization with each other is 1,
The EDRV 519 is supplied to the third and fifth sensors, and the EDRV 519 is supplied to the second and fourth sensors, and the respective sensors 58, 59, 60, 61, 6
2 independently output video signals V1 to V5 in synchronization with the drive pulse, and are amplified to a predetermined voltage value by an independent amplifier circuit 42 for each channel shown in FIG. OOS5 of FIG. 6B through 1)
At timing 29, V1, V3, and V5 are transmitted at the timing of EOS534, and signals of V2 and V4 are transmitted and input to the video processing unit.

A color image signal obtained by reading the original input to the video processing unit 12 by dividing it into five parts is G (green), B (blue), R (red) by the sample hold circuit S / H43. Are separated into three colors. Therefore, after S / H, a signal processing system of 3 × 5 = 15 systems is provided. FIG. 52 shows a timing chart of obtaining digital data A / Dout that has been input and sampled and amplified for one channel, input to the A / D conversion circuit 45, and then multiplexed. FIG. 8 shows a processing block diagram.

The analog color image signals read by the above-mentioned five-chip equal-size color sensor are input to the analog color signal processing circuit of FIG. 8 for each of the five channels. Since the circuits A to E corresponding to the respective channels are the same circuit, the circuit A will be described together with the waveform timing in FIG. The input analog color signal is in the order of G → B → R as shown in FIG. 52 SiGA, and sample / hold pulses SHG535, SHB536, SHR537 for each color by the sample / hold circuit (S / H) 250.
Is converted to parallel for each color. FIG. 52 VDG1, VDB
1, VDR1 (538 to 540) Here, the signals 538 to 540 separated for each color are subjected to offset (characteristics in FIG. 52O) adjustment by the amplifiers 251 to 253, and then to the low-pass filters (LPF) 254 to 256 except for the signal components. After the cassette of the band G is adjusted by the amplifiers 257 to 259 (G characteristic in FIG. 53), the pulses GSEL, BSEL, and RSEL are again multiplexed into one signal.
(544-546), the MPX 260 becomes one system, and is A / D converted and converted into a digital value (ADOU
T547). In this configuration, since multiplexing is performed by the MPX 260 and then A / D conversion is performed, color signals of a total of 15 systems of 5 channels each for 3 colors 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, five staggered sensors having an interval of four lines (62.5 μm × 4 = 250 μm) in the sub-scanning direction and divided into five regions in the main scanning direction are used. Since the original is being read, as shown in FIG. 9, the reading positions are shifted between the channels 2 and 4 that are being pre-scanned and the remaining 1, 3, and 5. Therefore, in order to connect this correctly, a memory for a plurality of lines is used. FIG. 54 shows the memory configuration of the present embodiment.
Numerals 74 are memories storing a plurality of lines, respectively, in a FiFo configuration. That is, 70, 72, 7
4 is 1024 pixels per line for 5 lines, 71 and 7
3 has a capacity of 15 lines, and the last pointer WPO
Data is written one line at a time from the point indicated by 75 and WPE 76, and when writing for one line is completed, WPO or WPE is incremented by one. WPO75
Is common to channels 1, 3, and 5, and WPE 76 is common to channels 2 and 4.

OWRST 540 and EWRST 541 are signals for initializing the values of the respective line pointers WPO 75 and WPE 76 and returning them to the beginning.
RST 543 is a read pointer (pointer for reading)
Is a signal for returning the value of. Now, description will be made on channels 1 and 2 as an example. As shown in FIG. 9, channel 2 precedes channel 1 by four lines, so that channel 2 is read for the same line, for example, line.
After writing to the Fo memory 71, channel 1 reads the line four lines later. Therefore, if the WPE is advanced by 4 from the write pointer WPO to the memory, the same line is read from channels 1, 3, 5 and channels 2 and 4 when reading from the FIFO memory with the same read point value. Thus, the deviation in the sub-scanning direction is corrected. For example, in FIG. 54, the channel 1 has a WPO at the first line 1 of the memory and the channel 2 has a WPE at the fifth line 5 from the top. If you start from this point, WPO
Indicates 5, the WPE points to 9, and the line on the document is written in the area where the pointers are both 5, and thereafter, the RP
It is sufficient to read out cyclically while advancing both O and RPE (read pointer) in the same manner. FIG. 55 is a timing chart for performing the above-described control. Image data is sent line by line in synchronization with HSYNC 515. EWRST 541 and OWRST 540 are generated with a shift of four lines as shown in the figure.
Is the capacity of the FiFo memories 70, 72 and 74, and therefore 5
For each line, ERST 543 is generated every 15 lines for similar reasons. On the other hand, when reading, first, channel 1
5 times faster than 1 line, then 1 line from channel 2 and then 3 channels, 4 channels,
The signals are sequentially read out from five channels, and connected signals from channels 1 to 5 can be obtained during 1HSYNC. Further, 1RD to 5RD (544 to 548) indicate valid section signals of the read operation of each channel. The control signal for controlling the image connection between the channels using the present FIFO memory is a memory control circuit 57 'in FIG.
Generated by The circuit 57 'is constituted by a discrete circuit such as TTL, but the description is omitted because it is not the gist of the present invention. The memory has three colors of a blue component, a green component, and a red component of an image. However, since the memory has the same configuration, the description is limited to only one color.

FIG. 10 shows a black correction circuit. As shown in FIG. 56, the black level outputs of the channels 1 to 5 have large variations between chips and pixels when the amount of light input to the sensor is small.
If this is output as it is to output an image, 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 correction is performed by a circuit as shown in FIG. Prior to the copy operation, the original scanning unit is moved to a position of a black plate having a uniform density disposed in a non-image area at the leading end of the original table, and the halogen is turned on to input a black level image signal to the circuit. The selector 82 selects A (d), closes the gate 80 (a), and opens 81 so that one line of this image data is stored in the black level RAM 78. In other words, the data lines are connected in the order of 551 → 552 → 553, while the address input of the RAM outputs c so that the output of the address counter 84 initialized by HSYNC is input, and the black level signal for one line is output. The data is stored in the RAM 78 (the above-described black reference value capturing mode). At the time of image reading, the RAM 78 is in a data reading mode, in which data is read and input for each line, pixel by pixel, to the B input of the subtractor 79 via the data line 553 → 557. That is, at this time, the gate 81 is closed and closed (b), and the gate 80 is opened (a). Therefore, the output 556 of the black correction circuit is the black level data DK (i).
For example, in the case of a blue signal, Bin (i) -DK
(I) = obtained as Bout (i) (black correction mode). Similarly, green Gin and red Rin are 77G,
Similar control is performed by 77R. The control lines a, b, c, and d of the selector gates for this control are provided by the CPU.
(FIG. 222) Latch 85 assigned as I / O
Is performed under CPU control.

Next, the white level correction (shading correction) will be described with reference to FIGS. 11, 57 and 58. In the white level correction, the sensitivity variation of the illumination system, the optical system, and the sensor is corrected based on the white data when the original scanning unit is moved to the position of the uniform white plate and irradiated. FIG. 11 shows a basic circuit configuration. Although the basic circuit configuration is the same as that of FIG. 10, the difference is that the subtractor 79 performs the black correction, whereas the multiplier 79 'is used in the white correction. Description is 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, prior to the copying operation or the reading operation, the exposure lamp is turned on to correct the image data of the uniform white level for one line. Store in RAM 78 '. For example, if it has a width in the main scanning direction A4 longitudinal direction, 16 pe
1 / mm = 16 × 297 mm = 4752 pixels, that is, at least the capacity of the RAM is 4752 bytes, and as shown in FIG. 57, the white plate data Wi of the i-th pixel (i = 1 to 475)
In the case of 2), the data for the white plate for each pixel is stored in the RAM 78 '. On the other hand, for Wi, the data Do after correction for the read value Di of the normal image of the i-th pixel.
= Di × FFH / Wi. Therefore, the latch 85 'is sent from the CPU (FIG. 222) in the controller.
The gate 80 'is closed for a', b ', c', d 'and 8
1 'is opened, and the selectors 82' and 83 'output a signal so that B is selected, so that the RAN 78' can be accessed by the CPU. Next, data is replaced by sequentially calculating FFH / Wo for the _first pixel Wo and FF / W ₁ ... For W1.
When the processing is completed for the blue component of the color component image (St in FIG. 58)
epB) Similarly, the green component (StepG) and the red component (StepR) are sequentially performed, and the gate 80 'is opened (a') so that Do = Di * FFH / Wi is output for the original image data Di input thereafter. , 81 ′ are closed (b ′), A is selected by the selector 83 ′, and the coefficient data FFH / Wi read from the RAN 78 ′ is transmitted from the signal line 553 to 557.
, Is multiplied by the original image data 551 input from one side, and output.

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

Further, in this configuration, one line of image data is input at a high speed, and
R, the point P at an arbitrary position on the document, for example, coordinates (xmm, ymm) on the document as shown in FIG.
When it is desired to detect the component of the image data of
× x) The line and the scanning unit are moved, and this line is fetched into the RAM 78 ′ by the same operation as described above, and the data of the (16 × y) -th pixel is read.
The component ratio of G and R can be detected (hereinafter, this operation is referred to as “line data fetch mode”). Further, those skilled in the art can easily guess that this configuration can easily obtain an average (hereinafter, referred to as “average value calculation mode”) density histogram (hereinafter, referred to as “histogram mode”) of a plurality of lines. .

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 variation of the optical system light amount and the white level sensitivity. The color image data that is uniform in the scanning direction and is proportional to the input light amount is input to the logarithmic conversion circuit 86 (FIG. 5) in accordance with the human eye's relative luminous efficiency characteristics. Here, white = 00H,
The image source converted to black = FFH and input to the image reading sensor, for example, a normal reflective original and a transparent original such as a film projector, or even the same transparent original, negative film, positive film or film sensitivity and exposure state Since the input gamma characteristics are different, a plurality of logarithmic conversion LUTs (look-up tables) are provided as shown in FIG. The switching is performed by the signal lines lg0, lg1, lg2 (5
60-562), and the I / O of the CPU (22).
This is performed by inputting an instruction from an operation unit or the like as a port. Here, the data output for each of B, G, and R is
The output corresponding to the density value of the output image corresponds to the amount of yellow toner for B (blue), the amount of magenta for G (green), and the amount of cyan for R (red). Therefore, the subsequent color image data is associated with Y, M, and C.

Each color component image data from the original image obtained by logarithmic conversion, ie, a yellow component, a magenta component,
The following color correction is performed on 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 have an unnecessary transmission area such as a hatched portion, while the color toner (Y, M , C) also have an unnecessary absorption component as shown in FIG. Then, for each color component image data Yi, Mi, Ci,

[0034]

[Outside 1] Masking correction for calculating a linear expression of each color and performing color correction is well known. Further, by Yi, Mi and Ci, M
in (Yi, Mi, Ci) (the minimum value of Yi, Mi, and Ci) is calculated, and is used as a sum (black). An undercolor removal (UCR) operation for reducing the amount of each color material to be added is often performed accordingly. Fig. 16 shows masking, summing and UC
The circuit configuration of R is shown. The feature of this configuration is that it has two masking matrices and can switch one signal line "1/0" at high speed. With or without UCR, one signal line "1/0" It is possible to switch at high speed. There are two circuits for determining the amount of smear, and it is possible to switch at high speed with "1/0". First, prior to image reading, desired first matrix coefficient M ₁ and second matrix coefficient M ₂ are set to C
The setting is made from the bus connected to the PU 22. In this example

[0035]

[Outside 2] There, M ₁ is the register 87 to 95, M ₂ is set to 96 to 104. 111-122, 135, 131
Are selectors, which select A when the S terminal is "1" and select B when the S terminal is "0". Therefore, the matrix M ₁
Is selected. Switching signal MAREA 564 = "1"
To, to "0" If you want to select the matrix M _2. Reference numeral 123 denotes a selector, and the selection signals C ₀ and C ₁ (56
6, 567) based on the truth table of FIG.
b and c are obtained. The selection signals C ₀ , C _1, and C ₂ are, for example, (C ₂ , C ₁ , C ₀ ) = (0, 0, 0) in the order of Y, M, C, and Bk with respect to the color signal to be output. (0,0,
1), (0, 1, 0), (1, 0, 0), and by setting (0, 1, 1) as a monochrome signal, a desired color-corrected color signal is obtained. Now (C ₀ , C ₁ , C ₂ ) = (0,
0, 0) and MAREA = "1", the outputs (a, b, c) of the selector 123 are stored in the registers 87, 8
8, 89, and therefore (a _Y1 , -b _M1 , -C _C1 ) are output. On the other hand, from the input signals Yi, Mi, Ci, Min
The black component signal 574 calculated as (Yi, Mi, Ci) = k undergoes a primary conversion at 134 at Y = ax−b (a and b are constants), and the subtractor 1 (through the selector-135).
24, 125 and 126 are input to the B input. In each of the subtractors 124 to 126, Y = Yi− (ak−
b), M = Mi- (ak-b), C = Ci- (ak-
b) is calculated, and the multipliers 127, 128, and 12 for the masking operation are calculated via the signal lines 577, 578, and 579.
9 is input. The selector-135 outputs the signal UAREA5.
The UAREA 565 has a configuration in which UCR (under color removal), presence / absence, and absence can be switched at high speed by “1/0”. Multipliers 127, 128, 1
29, A inputs (a _Y1 , -b _M1 ,-
C _C1 ) and B input to the above [Yi- (ak-b), M
i- (ak-b), Ci- (ak-b)] = [Yi, M
i, Ci] are input, so that the output Dout has a condition of C ₂ = 0 (YorMorC
Select) and Yout = Yi × (a _Y1 ) + Mi × (−b _M1 )
+ Ci × (−C _C1 ) is obtained, and yellow image data subjected to masking color correction and under color removal processing is obtained.
Similarly, Mout = Yi × (−a _Y2 ) + Mi × (b _M2 ) + Ci × (−C _C2 ) Cout = Yi × (−a _Y3 ) + Mi × (−b _M3 ) + Ci × (C _C3 ) becomes Dout Is output. The color selection is controlled by the CPU 22 according to the table shown in FIG. 59 according to the development order of the color printer (C ₀ , C ₁ , C ₂ ) as described above.
Register 105～107,108～110 are registers for monochrome image formation, by the principle similar to the masking color correction described _{above, MONO = k 1 Yi + l} 1 Mi + m
Each color is obtained by weighted addition using ₁ Ci. Switching signal MAREA 564, UAREA 565, KAR
EA587 is, switching speed of the coefficient matrix M ₁ and M ₂ of the masking color correction as described above, UAREA565
Is high-speed switching with and without UCR, KAREA58
Reference numeral 7 denotes a primary conversion switching of a black component signal (output from the signal line 569 to the Dout through the selector 131), that is, K
= Min (Yi, Mi, Ci) is a signal that switches the characteristics of Y = ck-d or Y = ek-f (c, d, e, and f are constant parameters) at high speed. In this configuration, the masking coefficient can be changed for each region, and the UCR amount or the sum amount can be switched for each region. Therefore, this configuration can be applied to a case where images obtained from image input sources having different color separation characteristics or a plurality of images having different black tones are combined as in the present embodiment. Note that these area signals MAREA, UARE
A and KAREA (564, 565, 587) are generated by an area generation circuit (FIG. 251) described later.

FIGS. 17, 60, 61, and 62 show the area signal generation (MAREA 564 and UAREA 56 described above).
5, KAREA587 etc.). The region means, for example, a hatched portion in FIG. 61, which is distinguished from other regions by a signal like the timing chart AREA in FIG. Is done. Each area is specified by the digitizer 16 in FIG. FIG. 17 and FIG. 60 show a configuration in which the generation position, the section length, and the number of sections of the area signal can be obtained by the CPU 22 in a programmable manner. In this configuration,
One area signal is generated by one bit of a RAM accessible to the CPU, and for example, n area signals AREA0 to AREA0
In order to obtain AREAn, two RAMs having an n-bit configuration are provided (FIGS. 136 and 137). Now, such a region signal AREA0 of Figure 17, and when the get AREAn, making a "1" in bit 0 of the address x _1, x ₃ of the RAM, and all bit 0 of the rest of the address "0".
On the other hand, the address _{1, x 1, x 2,} x 4 of RAM "1"
, All the bits n of the other addresses are set to “0”. In synchronization with a constant clock based on HSYNC,
When the data in the RAM will sequentially read sequentially example, data "1" in terms of addresses x ₁ and x ₃ are read. This read data is shown in FIG.
J, K of JK flip-flops of 8-0 to 148-n
The output is toggled, that is, RA
When "1" is read from M and CLK is input, the output changes from "0" to "1", "1" to "0", and AREA
An interval signal such as 0, and thus a domain signal, is generated. When data = "0" over all addresses, no area section occurs and no area is set. FIG. 60 shows this circuit configuration, and 136 and 137 are the above-mentioned RAMs. This is because, for example, while the data is being read out line by line from the RAMA 136, the CPU 22
(FIG. 2) By performing a memory writing operation for setting a different area, the section generation and the memory writing from the CPU are alternately switched. Therefore, when the shaded area in FIG. 61 is designated, RAMA and RAMB are switched in the order of A → B → A → B → A.
_3, if C _4, C ₅₎ = and (0,1,0), VCLK
Is output to the RAMA 136 through the selector 139 as an address.
a), gate 142 is opened, gate 144 is closed and RAM
A136, and the total bit width and n bits are J-
The signals are input to the K flip-flops 148-0 to 148-n, and section signals of AREA0 to AREAn are generated according to the set values. Writing to B from the CPU is performed by the address bus A-Bus, the data bus D-Bus, and the access signal R / W during this time. On the contrary, RAMB13
When the section signal is generated based on the data set to 7 (C ₃ , C ₄ , C ₅ ) = (1, 0, 1), the same operation can be performed, and the data from the CPU to the RAMA 136 can be obtained. Writing can be performed (hereinafter, these two RAMs are referred to as A-RAM, B-RAM, C ₃ , C ₄ , and C ₅ as AREs, respectively).
A control signal (ARCNT) ... C ₃ , C ₄ , C ₅ are output from the I / O port of the CPU). FIG. 62 shows a correspondence table between each bit and a signal name.

Next, the circuit configuration of the color conversion will be described with reference to FIGS. 18, 63 and 64. Here, the color conversion means each color component data (Yi, Mi, Ci) input to the circuit.
When a color has a certain color density or a color component ratio, it is replaced with another color. For example, this means changing only the red (hatched portion) portion of the document in FIG. 63 to blue. First, each color data (Y
i, Mi, Ci) are averaging circuits 149, 150, 15
1 is averaged in units of 8 pixels, and one is calculated by an adder 155 to be (Yi + Mi + Ci).
3 and 154 to the B input and the other to the A input respectively. The input color component ratio is the yellow ratio ray = Yi / Yi +
Mi + Ci, magenta ratio ram = Mi / Yi + Mi +
Ci and cyan ratio rac = Ci / Yi + Mi + Ci are obtained as signal lines 604, 605, and 606, respectively, and input to window comparators 156 to 158. Here, the comparison upper and lower limits of each color component set by the CPU bus, and therefore (yn, mu, cu) and (y
l, ml, cl), that is, when yl ≦ ray <yu, output = “1”, ml ≦ r
When am <mu, the output = “1”, and when cl ≦ rac <cu, the output = “1”. When the above three conditions are met, it is determined that the input color is the desired color, and the three-input AND 165
Becomes = 1 and is input to the _S0 input of the selector 175. The adder 155 outputs when the signal line CHGCNT 607 output from the I / O port of the CPU 22 is “1”.

[0038]

[Outside 3] When "0", the output 603 = 1 is output. Therefore, the outputs of the dividers 152, 153 and 154 when "0" are
The A input is output as it is. That is, at this time, color density data is set in the registers 159 to 164 instead of the desired color component ratio. Reference numeral 175 denotes a four-system input, one-system output selector. Desired color data after conversion is input to inputs 1, 2, and 3 as a Y component, an M component, and a C component, respectively. Data Vin obtained by performing masking color correction and UCR on the original image is input and connected to Dout in FIG. Switching input S ₀
Is true for color detection. That is, "1", and other case of "0" when the predetermined color is detected, S ₁ is the area signal CHAREA ^O 615 generated by the area generating circuit shown in FIG. 60, the specified area "1", outside the area When it is "0" and "1", color conversion is performed, and when it is "0", it is not performed. The S ₂ and S ₃ inputs C ₀ and C ₁ (616, 617) correspond to C ₀ , C
The same _first signal and the _{(C 0, C 1) =} (0,0),
At (0, 1) and (1, 0), yellow image formation, magenta image formation, and cyan image formation are respectively performed by a color printer. FIG. 63 shows a truth table of the selector 175. The registers 166 to 168 set a desired color component ratio or color component density data after conversion from the CPU.
When y ', m', and c 'are color component ratios, CHGCNT6
07 = “1”, the output 6 of the adder 155
03 becomes (Yi + Mi + Ci), and the multipliers 169-1
71, the selector inputs 1, 2,.
3 have (Yi + Mi + Ci) × y ′ and (Yi +
(Mi + Ci) × m ′ and (Yi + Mi + Ci) × c ′ are input and color-converted according to the truth table FIG. On the other hand, when y ', m', and c 'are color component density data, CHG
CNT is set to “0” and the signal 603 is set to “1”, so that the outputs of the multipliers 169 to 171 and therefore the selector 17
Data (y ′, m ′, c ′)
Is input as it is, and color conversion is performed by replacing the color component density data. Area signal CHAREA ⁰ 615
Since the section length and number can be set arbitrarily as described above,
This color conversion is applied only to a plurality of regions r ₁ , r ₂ , r ₃ as shown in FIG. 64, or by preparing a plurality of circuits in FIG. 18, for example, the region r ₁ is red → blue, r ₂ Is red → yellow, r ₃
Inside, color conversion over a plurality of regions such as white → red and a plurality of colors can be performed at high speed and in real time. This is because a plurality of the same color detection → conversion circuits as those described above are provided, and the selectors 230 output the outputs A, B, C,
The necessary data is selected from D by CHSEL0 and CHSEL1 and output to the output 619. The area signals applied to each circuit are CHAREA0 to CHAREA3 and CHSELA3.
0 and 1 are also generated by the area generating circuit 51 as shown in FIG.

FIGS. 19, 65 and 66 show a gamma conversion circuit for controlling the color balance and color shading of an output image in the present system. Basically, data conversion by an LUT (lookup table) is performed. Then, the data in the LUT is rewritten in accordance with the input designation from the operation unit. When writing data to the LUT RAM 177, by setting the selection signal line RAMSL 623 to “0”, the selector 176 selects the B input and the gate 17
8 is closed, 179 is open and bus AB from CPU 22
US and DBUS (address data) are connected to the RAM 177, and data writing or reading is performed. Once the conversion table is created, RAMSL623 =
"1" and the video input from Din 620 is RAM
The data is input to the address input of 177, is addressed with video data, and the desired data is output from the RAM and input to the next-stage scaling control circuit through the opened gate 178. The gamma RAM contains yellow, magenta,
There are at least two types of cyan, black, and MONO (FIGS. 65A and 65B).
As in FIG. 16, C ₀ , C ₁ , C ₂ (566, 567, 56
The area A has a gamma characteristic of A and the area B has a gamma characteristic of B as shown in FIG. This is a configuration that can be obtained as a print.

This gamma RAM has zooming characteristics of two types A and B, and can be switched at high speed for each area.
By adding this, it is also possible to switch more characteristics at high speed. Dout 625 in FIG. 19 is input to the input Din 626 of the scaling control circuit in the next stage FIG.

As is apparent from the figure, the gamma conversion RAM is adapted to individually switch characteristics for each color, and is rewritten by the CPU 22 in association with an operation from a liquid crystal touch panel key on the operation panel. For example, the density adjustment key e on P000 (standard screen) in FIG.
Or, when the operator touches f, when the operator touches e from the center 0, the setting moves from -1 to -2 to the left as shown in FIG. 60, and the characteristics in the RAM 177 also change from -1 to -2 to -3 to -4 is selected and rewritten. Conversely, when f is touched, the characteristic is selected as + 1 → + 2 → + 3 → + 4, and the RAM 177 is similarly rewritten. That is, in the standard screen, e
Alternatively, by touching the key f, the entire table (RAM 177) of Y, M, C, Bk, or MONO is rewritten, and the density can be adjusted without changing the color tone. On the other hand, in the screen shown in FIG. 37P420 (in <color create> mode, color balance adjustment), in order to adjust the color balance, only the area in the RAM 177 is individually rewritten for each of Y, M, C, and Bk. That is, for example, pressing the case screen P420 in touch key y ₁ to change the color tone of the yellow component, the black strip display extends upwardly, conversion characteristics y ₁ direction, thus the yellow component is darker as in FIG. 66 4Y becomes a direction, when you touch the touch key y ₂ y
Characteristics are selected in _two directions, and the yellow component becomes lighter. That is, in this operation, only the density of the single color component changes, and the color tone changes. The same applies to M, C, and Bk.

FIG. 20 Reference numerals 180 and 181 denote FiFO memories each having a capacity of 16 × 297 = 4752 pixels in the main scanning direction for one line, for example, 16 pel / mm, A4 longitudinal width of 297 mm, and AWE, BWE =
Write operation to memory during “Lo”, ARE, BRE =
A read operation of “Lo” section is performed, and ARE = “Hi”
The output of A at the time and the output of B at the time of BRE = “Hi” are in a high impedance state. Therefore, each output is wired-ORed and output as Dout 627.
FifoA and FiFoB 180 and 181 are internally provided with a write address counter and a read address counter operated by WCK and RCK (clock), respectively. (In FIG. 67, the internal pointer is advanced. The video data transfer clock VCLK588 in the system is supplied to the WCK by the rate multiplier 6.
30. The thinned CLK is given at 30 and VCK588 is applied to RCK.
It is well known that when CLK is not thinned out, the input data to this circuit is reduced at the time of output, and when the reverse is applied, the data is expanded, and the read and write operations of FiFoA and FiFoB are performed alternately. In addition, the FIFO memory 18
0, 181, the W address counter 182 and the R address counter 183 provide enable signals (WE, RE... 63).
5, 636) is enabled by the clock only during the section of enable “Lo” and initialized by RST (634) = “Lo”. For example, as shown in FIG. 67, RST (main in this configuration) Scanning direction synchronization signal HS
After using YNC), pixel data is written by setting AWE = “Lo” (same for BWE) for m pixels from the n _1st pixel, and ARE = m for m pixels from the n ₂ pixel.
When the pixel data is read out with “Lo” (the same applies to the BRE), the data moves like WRITE data → READ data in FIG. That is, AWE (and BWE), ARE
The image is arbitrarily moved in the main scanning direction as shown in FIG. 68 by changing the occurrence position and section of (and BRE), and is scaled and moved in combination with the aforementioned WCK or RCK thinning-out. Control can be easily performed. AWE, ARE, BWE, and BRE input to this circuit are generated by the area generation circuit diagram 60 as described above.

After scaling control is performed in the main scanning direction as required in FIGS. 20, 67, and 68, processing of edge enhancement and smoothing (smoothing) is performed in FIGS. 21, 69, and 70. Is performed. FIG. 21 is a block diagram of this circuit. Each of the memories 185 to 189 has a capacity of one line in the main scanning direction, and has a FiFO configuration in which a total of five lines are sequentially stored cyclically and simultaneously output in parallel. . Reference numeral 190 denotes a commonly used second-order differential spatial filter which detects an edge component. The output 646 is applied with a gain 196 having a characteristic shown in the graph of FIG. The shaded portion in the graph of FIG. 21 is clamped to 0 in order to remove a small component, that is, a noise component, from the components output by edge enhancement. On the other hand, the buffer memory outputs for the five lines are input to smoothing circuits 191 to 195, and averaging is performed for each of 5 × 1 to 5 × 5 pixel block units shown in FIG. ~ 64
5, the desired smoothed signal is selected by the selector 197. The SMSL signal 651 is an I / O signal of the CPU 22.
It is output from the port and controlled in association with the designation from the operation panel as described later. Reference numeral 198 denotes a divider, for example, when 3 × 5 smoothing is selected, CP
When "15" is set by U22 and "3.times.7" smoothing is selected, "21" is set by CPU 22 and averaged.

The gain circuit 196 has a look-up table (LUT) configuration, and the gamma circuit shown in FIG.
9 to which the data is written by the CPU 22.
M, and when the input EAREA 652 is set to “Lo”,
The output is set to "0". Further, the edge enhancement control and the smoothing control correspond to the liquid crystal touch panel screen on the operation panel, and the screen of FIG. 69 (FIG. 2-7P)
430), in the direction of strong <sharpness> 1, 2, 3, 4
, The conversion characteristic of the gain circuit is rewritten by the CPU 22 as shown in the graph of FIG. On the other hand, 1 'in the <sharpness> weak direction,
When the operator operates 2 ′, 3 ′, 4 ′, the switching signal SMSL652 of the selector 197 causes the smoothing block size to be 3 × 3, 3 × 5, 3 × 7,
It is selected to be as large as 5 × 5. 1 × 1 at center point C
Is selected, and the gain circuit input EAREA651 = “L”
o ", the input Din is not subjected to any of the smoothing and the edge enhancement, and is output as Dout to the output of the adder 199. In this configuration, for example, moiré generated for a halftone dot document is smoothed. Improved,
Also, sharpness will be improved by performing edge emphasis on characters and line drawings, but when a halftone dot document and a character line drawing are in the same document, for example, if smoothing is applied to improve moiré, The EAREA 651 and the SMSL generated in the area generation circuit diagram 60 are used in order to improve the disadvantage that the moiré appears strongly when the character portion is blurred and the edge is emphasized.
By controlling 652, for example, 3
× 5 smoothing is selected, and EAREA is selected as shown in FIG.
When 651 is generated like A 'and B' and applied to the original dot plus character, moire is improved for a dot image and sharpness is improved for a character area. The signal TMAREA 660 is generated by the area generating circuit 51 in the same manner as the EAREA 651, and when TMAREA = "1", the output Dout = "A + B", and when TMAREA = "0", Doout.
out becomes “0”. Therefore, when a signal as shown in, for example, FIG. 70 660-1 is generated under the control of TMAREA 660, the hatched portion (inside the rectangle) is extracted, and the signal shown in FIG.
When a signal such as -2 is generated, a hatched portion (inside the rectangle) is extracted (opened out).

FIG. 5 shows a document coordinate recognizing circuit 200 for recognizing the coordinates of the four corners of a document placed on a document table, which is held in an internal register (not shown). The coordinate data is read from the register. It is disclosed in detail in JP-A-59-74774, and will not be described in detail. However, in the prescan for the document position recognition, FIG. 10, a black correction shown in FIG. 11, after the white correction, masking calculation coefficients shown in FIG. 16, k _1, monochrome l _1, m ₁ select image data generation, figure C _0, C _1, C ₂ is (0,1,1), such that further not performed UCR (under color removal) UAREA565 =
By setting “Lo”, the image data is input to the document position recognition unit 200 as monochrome image data.

FIG. 22 shows an operation panel unit, particularly a control unit for a liquid crystal screen, and a key matrix according to the present invention. FIG.
The liquid crystal controller 201 of FIG.
And key matrix 2 for key input and touch key input
The operation panel is controlled by a command given to the I / O port 206 for controlling the operation panel 09. Fonts to be displayed on the liquid crystal screen are stored in the FONT ROM 205.
Refresh RA by program from PU22
Transferred to M204. The liquid crystal controller sends screen data for display to the liquid crystal display 203 via the liquid crystal driver 202 to display a desired screen. On the other hand, all the key inputs are controlled by the I / O port 206, and the pressed key is detected by a generally performed key scan, and the I / O port → CPU 2
2 is input.

FIG. 23 shows a configuration in which a film projector 211 is mounted and connected to the present system (FIG. 1).
The same reference numerals as those in FIG. 1 denote the same components, and a reflection mirror 218, a Fresnel lens 212,
13 is mounted thereon, and the transmitted light image of the film 216 projected by the film projector 211 is scanned in the direction of the arrow by the above-described original scanning unit, and is read in the same manner as the original original. Film 216
Is fixed by a film holder 215, and a lamp 212 is turned on / off by a lamp controller 212.
F and PJON65 from the I / O port of the CPU 22 (FIG. 2) in the controller 13 to control the lighting voltage.
5, PJCNT657 is output. The lamp controller 212 determines the lamp lighting voltage as shown in FIG. 24 based on the 8-bit value of the input PJCNT 657, and is normally controlled between Vmin and Vmax. Digital data of when the input is a D _A to D _B. FIG. 25 shows an operation flow for reading an image from a film projector and performing copying, and FIG. 71 shows a schematic timing chart. S
1, the operator moves the film 216 to the film projector 2
11 and the following shading correction (S2) and AE (S
The lamp lighting voltage Vexp is determined according to 3), and the printer 2
Is activated (S4). Prior to the ITOP (image leading edge synchronization signal) signal from the printer, PJCNT = Dexp
(Corresponding to the appropriate exposure voltage), the light amount becomes stable during image formation. A Y image is formed by the ITOP signal, and darkly lit by D _A (corresponding to the minimum exposure voltage) until the next exposure, thereby preventing the filament from being deteriorated by a rush current when the lamp is lit and extending the life. . Thereafter, similarly, after M image formation, C image formation, and black image formation (S7
To S12), PJCNT = “00” and the lamp is turned off.

Next, the processing procedure of AE and shading correction in the projector mode will be described with reference to FIGS. 29 and 73. 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 one of a color positive, a black and white negative, and a black and white positive. In the case of a color negative, the film carrier 1 in which the cyan color correction filter is inserted is set in the projector, the unexposed portion (film base) of the film to be used is set in the film holder, and the film has a sensitivity of 100 or more. Not less than 400 or 40
Select whether it is greater than or equal to 0 and press the shading start button when the projector lamp is lit at the reference ignition voltage V _1. Here, the cyan-based 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, and B filters are attached. Also, by extracting the shading data from the unexposed portion, the dynamic range can be widened even for a negative film. If other than color negative film, sets the film carrier 2 has been fitted with ND filter (or no filter), pressing the shading start key on the liquid crystal touch panel, projector lamp is lit with a reference lighting voltage V ₂ . Actually, if the operator selects a negative film or a positive film, the switching of the reference lighting voltages V ₁ and V ₂ may be automatically performed by recognizing the type of the film carrier. Next, the scanner unit moves to the vicinity of the center of the image projection unit, takes in the average value of one line of CCD or a plurality of lines as shading data for each of R, G, and B into the RAM 78 'of FIG. 11, and turns off the projector lamp.

Next, the image film 216 to be actually copied
Is set in the film holder 215. If focus adjustment is necessary, the projector lamp is turned on by the lamp lighting button on the operation panel, the focus is adjusted visually, and then the lamp is turned off again by the lamp lighting button.

[0050] In the turn on the copy button corresponding to the color negative selection of whether or not the result described above, the projector lamp is automatically turned on in V ₁ or V _2, pre-scanning of the image projection unit (AE) is performed. The pre-scan is for determining the exposure level at the time of projecting the film to be copied, and is performed according to the following procedure. That is, the R signals of a plurality of predetermined lines in the image projection area are inputted by the CCD, and the R signal pair appearance frequency is accumulated, and the signals are obtained as shown in FIG.
(“Histogram creation mode” in FIG. 11). From this histogram, the max shown in the figure
The maximum and minimum R signal values Rmax and Rmin that the histogram crosses the level of 1/16 of the max value
Ask for. Then, the lamp light quantity multiple α is calculated according to the film type selected first by the operator. The value of α is α = 255 / Rma for color or monochrome positive film
x, for black and white negative α = C ₁ / Rmin, ASA sensitivity 4
Α = C ₂ / Rmin, AS for color negative less than 00
Α = C ₃ / Rmi for a color negative with A sensitivity of 400 or more
It is calculated as n. 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 supply of the projector lamp by a predetermined look-up table. Next, the projector lamp is lit by the lamp lighting voltage V obtained in this manner, and a logarithmic conversion table (FIG. 3) and a masking coefficient (FIG. 1) are selected according to the film type.
6 is set to an appropriate value, and a normal copying operation is performed. As shown in FIG. 3, the selection of the logarithmic conversion table is such that eight kinds of tables 1 to 8 are selected by a 3-bit switching signal. 4, a color negative (less than ASA400), 5 a color negative (ASA400 or more), 6 a monochrome negative, etc. The contents are R,
G and B can be set independently. FIG.
3 shows an example of the table contents.

Thus, the copying operation is completed. When the next film copy is made, the operator determines whether or not the film layer properties (negative / positive, color / monochrome etc) change, and returns to A in FIG. Returning to B, the same operation is repeated again.

As described above, the film projector 211
As a result, printouts corresponding to negative, positive, color, and black-and-white films can be obtained.However, in this system, as can be seen in FIG. In addition, smooth reproduction of gradation is required particularly from the application of the film. Therefore, this system uses the following color LBP
The gradation processing at the output side is different from that at the time of print output from a reflection original. This is the printer controller 70
This is carried out by the PWM circuit (778) included in 0.

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

FIG. 26A is a block diagram of a PWM circuit.
FIG. 26B shows a timing chart.

The input VIDEO DATA 800 is latched by the latch circuit 900 at the rising edge of VCLK 801 and synchronized with the clock. (See (B) FIGS. 800 and 801) VIDEO output from latch
LU composed of ROM or RAM for DATA 815
Tone correction is performed by T (look-up table) 901 and D
A / A (digital / analog) converter 902 performs D / A conversion to generate one analog video signal, and the generated analog signal is input to comparators 910 and 911 at the next stage and compared with a triangular wave described later. You. Signals 808 and 809 input to the other of the comparators are individually generated triangular waves (808 and 809 in the figure (B)) synchronized with VCLK. That is, VCLK801
The synchronous clock 2VCLK 803 having twice the frequency of the triangular wave generation circuit 9 according to the triangular wave generation reference signal 806 obtained by dividing the frequency of the synchronous clock 2VCLK 803 by, for example, a JK flip-flop 906.
08, and the other is 2VCLK
Is a triangular wave WV2 generated by a triangular wave generating circuit 909 in accordance with a signal 807 (see FIG. 807) which is obtained by dividing the frequency by 6 in a 6-frequency dividing circuit 905. Each triangle wave and VIDEO
DATA is all VCLK as shown in FIG.
Generated in synchronization with Further, each signal is inverted by an HSYNC 802 generated in synchronization with VCLK to be synchronized by an HSYNC 802, and the circuits 905 and 906 are connected to the HSYNC.
Initialize at the timing of. By the above operation, CMP1
910, CMP2 911 outputs 810, 811 according to the value of the input VIDEO DATA 800,
A signal having a pulse width as shown in FIG. 72 is obtained. That is, in this system, when the output of the AND gate 913 in FIG. (A) is "1", the laser is turned on, a dot is printed on the printing paper, and when the output is "0", the laser is turned off, and nothing is printed on the printing paper. Not done. Therefore, the control signal LON (805)
Can be turned off. FIG. 72 shows "black" from left to right.
The state when the level of the image signal D changes to “white” is shown. The input to the PWM circuit is “FF” for “white”,
Since “black” is input as “00”, the output of the D / A converter 902 changes as indicated by Di in FIG. On the other hand, since the triangular wave is like WV1 in (a) and WV2 in (b), the pulse width becomes narrower as the output of CMP1 and CMP2 changes from “black” to “white” like PW1 and PW2, respectively. It will become. Also as it is apparent from the figure, when selecting PW1, printing paper dots formed at intervals of _{P 1 → P 2 → P 3} → P 4, the variation of the pulse width has a dynamic range of W1. On the other hand, PW
When 2 is selected, dots are formed at intervals of P ₅ → P ₆ ,
The dynamic range of the pulse width is W2, which is three times as large as PW1. Incidentally, for example, the printing density (resolution) is set to about 400 lines / inch for PW1, about 133 lines / inch for PW2, and the like. As is clear from this, when PW1 is selected, the resolution is improved about three times as compared with the case of PW2. On the other hand, when PW2 is selected,
Since the dynamic range of the pulse width is about three times as wide as that of PW1, the gradation is remarkably improved. Therefore, for example, PW1 is selected when high resolution is required, and PW2 is selected when high gradation is required.
L804 is provided. That is, reference numeral 912 in the same figure designates a selector. When SCRSEL 804 is "0", A input is selected, that is, when PW1 is "1" and PW2 is output from the output terminal O, the finally obtained pulse width is obtained. Only the laser lights up and prints the dots.

The LUT 901 is a table conversion ROM for gradation correction, and stores K ₁ , K ₁ of 812 and 813 at addresses.
₂ , 814 table switching signal and 815 video signal are input, and corrected VIDEO DATA is obtained from the output. For example, to select PW1, SCRSEL80
When 4 is set to "0", the output of the ternary counter 903 becomes "0", and the correction table for PW1 in 901 is selected. K ₀ , K ₁ , and K ₂ are switched according to the color signal to be output. For example, K ₀ , K ₁ , K ₂ = “0,
0, 0 ", yellow output," 0, 1, 0 "magenta output," 1, 0, 0 "cyan output," 1, 1,.
When the value is 0 ", black output is performed. That is, the gradation correction characteristics are switched for each color image to be printed, thereby compensating for differences in gradation characteristics due to differences in image reproduction characteristics depending on the color of the laser beam printer. the K ₂ and K _0, K
_A wider range of gradation correction can be performed by the combination of ₁ . For example, the gradation conversion characteristics of each color can be switched according to the type of the input image. Next, when SCRSEL is set to “1” in order to select PW2, the ternary counter 603 counts the synchronization signal of the line and sets “1”.
→ "2" → "3" → "1" → "2" → "3" → ... LU
It outputs to the address 814 of T. Thus, the gradation correction table is switched for each line, thereby further improving the gradation.

This will be described in detail with reference to FIG. A curve A in FIG. 7A is a characteristic curve of input data versus print density when, for example, PW1 is selected and the input data is changed from "FF" or "white" to "0" or "black". Normally, the characteristic is desirably K. Therefore, B, which is the inverse characteristic of A, is set in the gradation correction table. FIG. 9B shows the gradation correction characteristics A, B, and C for each line when PW2 is selected. In the direction (image feed direction), as shown in the figure, three levels of gradation are provided to further improve the gradation characteristics. That is, in the portion where the density change is steep, the characteristic A is dominant and the steep reproducibility is obtained, the gentle gradation is reproduced by the characteristic C, and the B reproduces an effective gradation in the middle portion. Therefore, P
Even when W1 is selected, a certain degree of gradation is ensured at high resolution, and when PW2 is selected, very excellent gradation is ensured. Further, regarding the above-described pulse width, for example, PW
In the case of 2, 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, etc., dots are printed with a pulse width shorter than a certain width. No response (no response) area Figure 28
0 ≦ W ≦ wp, the region where the concentration is saturated FIG.
There is q ≦ W ≦ W2. Therefore, the pulse width and the density are set such that the pulse width changes between the effective areas wp ≦ W ≦ wq having linearity. That is, when the input data changes from 0 (black) to FF _H (white) as shown in FIG.
The pulse width varies from wp to wq, further ensuring linearity between the input data and the concentration.

The video signal converted to the pulse width as described above is supplied to the laser driver 711 via the line 224.
L modulates the laser light LB.

The signals K ₀ , K ₁ , and K ₁ shown in FIG.
₂ , SCRSEL and LON are output from a control circuit (not shown) in the printer controller 700 in FIG. 2 and are output based on the serial communication with the reader unit 1 (described above). At the time of use, SCRSEL = “1” is controlled, and a smoother gradation is reproduced.

[Image Forming Operation] The laser beam LB modulated according to the image data is horizontally scanned at high speed by the polygon mirror 712 rotating at high speed in the width of arrow AB in FIG. An image is formed on the surface of the photosensitive drum 715 through the θ lens 13 and the mirror 714, and dot exposure corresponding to image data is performed. One horizontal scan of the laser beam corresponds to one horizontal scan of the document image, and in this embodiment, corresponds to a width of 1/16 mm in the feed direction (sub-scan 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 is scanned in the sub-scanning direction of the drum. Since the drum 715 rotates at a constant speed,
As a result, the planar image is sequentially exposed to form a latent image. From the uniform charging by the charger 717 prior to the exposure, the above-described exposure → the toner development by the developing sleeve 731 forms toner development. For example, if development is performed with the yellow toner on the developing sleeve 731Y in response to the first document exposure scan in the color reader, a toner image corresponding to the yellow component of the document 3 is formed on the photosensitive drum 715.

Next, a yellow toner image is formed on a sheet 754 wrapped around a transfer drum 716 with the leading end carried by a gripper 751 by a transfer charger 729 provided at a contact point between the photosensitive drum 715 and the transfer drum 716. Is transferred and formed. The same process is repeated for M (magenta), C (cyan), and BK (black) images, and each toner image is superimposed on a sheet 754 to form a full-color image using four-color toner. You.

Thereafter, the transfer paper 791 is peeled from the transfer drum 716 by the movable peeling claw 750 shown in FIG. Paper 79
1 is fused and fixed.

<Explanation of Operation Section> FIG. 41 is an explanatory view of the operation section of the present color copying apparatus. A key 401 is a reset key for returning to the standard mode, and a key 402 is an enter key for setting a registration mode to be described later. Key, a key 404 is a numeric keypad for inputting a numerical value such as a set number, a key 403 is a clear / stop key for clearing a set number or stopping during continuous copying, and 405 is a touch panel key for setting each mode or for setting the printer 2 Is displayed. Key 407
Is a center movement key for designating center movement in a movement mode to be described later. A key 408 is a document recognition key for automatically detecting a document size and a document position during copying.
Is a projector key for designating a projector mode to be described later, a key 409 is a recall key for restoring a previous copy setting state, and a key 410 is a memory key for storing or recalling preset values of each mode. M1, M2, M3, M4) and a key 411 are registration keys for each memory.

<Digitizer> FIG. 32 shows digitizer 1
6 is an external view of FIG. Keys 422, 423, 424, 42
Reference numerals 5, 426, and 427 denote entry keys for setting each mode described later. A coordinate detection plate 420 is a coordinate position detection plate for designating an arbitrary area on the document or setting a magnification. The point pen 421 specifies the coordinates. These keys and coordinate input information are received from the CPU 22 via the bus 505, and the information is accordingly stored in the RAM 24 and RA.
It is stored in M25.

<Description of Standard Screen> FIG. 33 is an explanatory diagram of the standard screen. The standard screen PO00 is a screen that is displayed when copying or setting is not being performed, and allows setting of scaling, paper selection, and density adjustment. In the lower left part of the screen, so-called fixed-size scaling can be specified. For example, when a touch key a (reduction) is pressed, a change in size and a magnification are displayed as shown on a screen PO10. When the touch key b (enlarge) is pressed, the size and magnification are displayed in the same manner, and in this color copying apparatus, three reduction stages and three enlargement stages can be selected. When returning to the same magnification, pressing the touch key h (actual magnification) results in a magnification of 100%. Next, when the display center touch key c is pressed, the upper cassette and the lower cassette can be selected. When the touch key d is pressed, an APS (Auto Paper Select) mode can be set in which a cassette containing 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 a print image, and can be set even during copying. The touch key g is
In operation of the present color copying apparatus, explanations of touch keys, how to make a copy, and the like are given. This is an explanation screen, and the operator can easily handle it by seeing this screen. In addition to the description of the standard screen, a description screen of each mode is prepared in each setting mode described later. The status of each mode currently set is displayed on the black striped display section at the top of the screen, so that an operation error or setting can be confirmed. In the lower message display area, a status of the present color copying apparatus such as a screen PO20 and a message such as an operation error are displayed.
Further, the JAM and the toner supply message are further displayed on the printer unit 16 over the entire screen, so that it is easy to determine which portion contains paper.

<Zoom Zoom Mode> Zoom Zoom Mode M
Reference numeral 100 denotes a mode for changing the size of a document and printing the image. The mode 100 includes a manual zoom magnification mode M110 and an automatic zoom magnification mode M120. In the manual zoom magnification mode M110, the magnification in the X direction (sub-scanning direction) and the magnification in the Y direction (main scanning direction) can be set to arbitrary independent magnifications in units of 1% using an editor or touch panel. The auto zoom magnification mode M120 is a mode in which an appropriate magnification is automatically calculated and copied in accordance with a document and a selected paper size. In addition, XY independent auto magnification, XY same rate auto magnification, X auto magnification, Four types of Y auto-magnification can be specified. In the XY independent auto scaling, the magnification in the X and Y directions is automatically set independently so that the original size or the paper size selected for a designated area on the original is obtained. In the XY auto-magnification, the XY independent auto-magnification is calculated and the XY is scaled at the smaller magnification, and printed. X auto scaling and Y auto scaling are modes in which auto scaling is performed only in the X direction and only in the Y direction.

Next, a method of operating the zoom magnification 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 a screen P100 in FIG. If you want to set the manual zoom here,
X written on the coordinate detection plate 420 of the editor 16
And the point of intersection of the magnification in the Y direction is designated by the point pen 421. At this time, the display changes to a 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, only in the X direction, the adjustment is performed by pressing the left and right keys (up, down) of the touch key b. When it is desired to make adjustments at the same XY rate, the left and right keys of the touch key d are used, and the display goes up and down at the same XY rate. Next, when it is desired to set the automatic zoom, the digitizer 16 is used from the screen P100 by the method described above, or the touch key a is pressed to display the screen P1.
The display is advanced to 10. Therefore, the above-described four types of auto zoom, XY independent auto zooming, XY same rate P auto zooming, X
To specify auto scaling and Y auto scaling, touch keys b and c, touch key d, touch key b
By pressing the touch key c, a desired auto zoom can be obtained.

<Movement Mode> The movement mode M200 is 4
There are three types of movement modes, center movement M210, corner movement M220, and designated movement M23, respectively.
0, binding margin M240. Center move M21
0 is a mode in which the document size or the designated area on the document is moved so that it is printed at the center of the selected sheet. The corner movement M220 is a mode in which a document size or a designated area on the document is moved to any of the four corners of the selected sheet. Here, as shown in FIG. 43, even when the print image is larger than the selected sheet size, control is performed so that the designated corner is moved as a start point. The designated movement M230 is a mode for moving the original or an arbitrary region of the original to an arbitrary position on the selected sheet. The binding margin M240 is a mode in which the sheet is moved left and right in the feed direction of the selected sheet so as to form a margin for a binding margin.

Next, an actual operation method of the present color copying apparatus will be described with reference to FIG. First, when the move key 423 of the digitizer 16 is pressed, the display is displayed on the screen P20.
Change to 0. On the screen P200, the four types of movement modes described above are selected.

When the center movement is designated, the screen P2
Press the touch key a of 00 to end the process. Corner movement
When touch key b is pressed, the display changes to screen P230,
Therefore, one of the four corners is designated. here,
Movement direction for actual print paper and screen P230
Corresponds to the designated direction, as shown in FIG. 35B, without changing the direction of the paper of the cassette selected on the digitizer 16, and has the same image as the one placed on the digitizer 16 as it is.
To perform the designated movement, touch key c on screen P200.
The screen proceeds to the screen P210, and the position of the movement destination is designated by the digitizer 16. At this time, the display changes to a screen P211 so that further fine adjustment can be performed using the up / down key in the figure. Next, when it is desired 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 a plurality of regions on the document can be designated. Any of these modes can be set. The trimming mode M310 described here is for copying only the image inside the designated area, and the masking mode M320 is for copying while masking the inside of the designated area with a white image. Also, image separation mode M3
30 further includes a color mode M331 and a color conversion mode M3.
32, a paint mode M333, and a color balance mode M334. In the color mode M331, the specified area is divided into four full colors, three full colors Y, M, C, Bk, RED, GR
An arbitrary color mode among nine types of EEN and BLUE can be selected. The color conversion mode M332 is a mode in which a predetermined color portion having a certain density range is replaced with another arbitrary color in a designated area and copied.

The paint mode M333 is a mode for making a copy uniformly painted with another arbitrary color over the entire designated area. Color balance mode M33
Reference numeral 4 denotes a mode in which the designated area is printed with a different color balance (color tone) from the non-designated area by adjusting the density of each of Y, M, C, and Bk.

In this embodiment of the area designation mode M300, a specific operation method will be sequentially described with reference to FIG.
First, when the area designation key 424 on the digitizer 16 is pressed, the liquid crystal display changes to the screen P300, and the document is placed on the digitizer 16 and the area is designated with the point pen 421. When two points in the area are pressed, the display changes to the screen P310. If the designated area is good, the touch key a on the screen P310 is pressed.
Next, one of trimming, masking, and image separation displayed on the screen P320 of the designated area is selected and a key is pressed. At this time, if the designation is trimming or masking, press the touch key a key on the screen P320,
Proceed to the next area specification. When the image separation is selected on the screen P320, the process proceeds to the screen P330 to perform color conversion, paint,
Select either color mode or color balance.
For example, if the user wants to print the image in the designated area in four colors of Y, M, C, and Bk, press the touch key a (color mode) on the screen P330 and select one of the nine color modes on the screen P360. Press touch key a to set area 4
The designation of printing in full color is completed.

When the touch key b for designating 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 subjected to the color conversion in the designated area is designated by the point. If the designated position is acceptable, the user presses the touch key a on the screen P341 and proceeds to the screen P370. The screen P370 is a screen for specifying a color after conversion, and specifies one of four types of a standard color, a specified color, a registered color, and white. Here, to select the converted color from the standard colors,
Press the touch key a on the screen P370 to display the yellow, magenta, cyan, black, red, green, and blue 7 displayed on the screen P390.
One of the colors is specified here. In other words, the standard color is color information inherent to the present color copying apparatus. In this embodiment, the print image is printed at exactly the intermediate density as the density of the print image at a ratio as shown in FIG. . However, there is, of course, a demand to make the density of the specified color a little lighter or darker. Therefore, the user can press the density specification key at the center of the screen P390 to perform color conversion at a desired density.

Next, when the touch key c (specified color) is selected on the screen P370, the process proceeds to the screen P380, and the point having the converted color information is pointed with the point pen in the same specification method as the color coordinates before the conversion. Specify and proceed to screen P381. even here,
As described above, when it is desired to perform color conversion by changing only the density without changing the color of the designated coordinates, the user can press the density adjustment k key a at the center of the screen P381 to perform color conversion at a desired density. It becomes possible.

On the screen P370, when there is no standard color or a desired color on the original, a color registration mode M7 described later is used.
Color conversion can be performed using the color information registered in step S10. In this case, press the touch key c on the screen P370,
Of the colors registered on the screen P391, the user presses the touch key of the color number to be used. Again, the registered color density,
It is possible to adjust only the density without changing the ratio of each color component. When the touch key c (white) is specified on the screen P370, the same effect as in the masking mode M310 is obtained.

Next, when it is desired to designate the paint mode M333 of the image separation mode M330, the touch key c on the screen P330 is pressed, and the screen proceeds to P370. The subsequent color designation after painting is performed on the screen P37 of the color conversion mode M332.
The operation is exactly the same as the setting method after 0.

When the user wants to print only the designated area on the screen P330 with a desired color balance (color tone), he presses a touch key d (color balance). At this time, the display changes to a screen P350, where the density adjustment of the toner components of the printer, yellow, magenta, cyan, and black, is performed using the up / down touch keys. Here, the screen P3
On 50, a black bar graph indicates a state in which the density is specified, and a scale is displayed beside the black bar graph to make it easy to see.

<Description of Color Create Mode> FIG. 41
In the color create mode M400, the color mode M410, the color conversion mode M420, and the
30, one or a plurality of modes can be specified from five types of modes: a sharpness mode M440 and a color balance mode M450.

Here, the difference between the area designation mode M300 and the color mode M331, the color conversion mode M332, the paint mode M333, and the color balance mode M334 is that the color create mode M400 is not for a certain area of the original document. The other functions exactly the same, except that the function operates on the entire document. Therefore, the description of the above four modes is omitted.

The sharpness mode 440 is a mode for adjusting the sharpness of an image. The sharpness mode 440 is a mode for emphasizing an edge in a so-called character image and adjusting a ratio of giving a smoothing effect to a halftone image. Next, a 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 a screen P400. When the touch key b (color mode) is pressed on the screen P400, the process proceeds to a screen P410, where a color mode to be copied is selected. When the color mode to be selected is a monochrome color mode other than the three-color color and the four-color color, the display further proceeds to the screen P411, where the user can select either negative or positive. When the touch key c (sharpness) is pressed on the screen P400, the screen changes to a screen P430 so that 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 emphasis increases as described above, and in particular, fine lines such as character images are clearly copied. When the weak touch key h is pressed, the peripheral pixels are smoothed, the so-called smoothing amount is increased, and settings can be made so that moiré and the like in a halftone dot document can be eliminated.

The operations in 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 will not be described here.

<Explanation of Inset Combining Mode> In the inset combining mode M6, an original such as E and F in FIG.
In this mode, the designated color image area is moved to the designated area of the monochrome image area (which may be a color image area) at the same magnification or at a variable magnification and printed.

The setting method of the inset synthesizing mode will be described with reference to the picture on the liquid crystal panel and the touch panel key operation. First, an original is placed on the coordinate detection plate of the digitizer 16 and an inset synthesizing key 427, which is an entry key for the inset synthesizing mode, is pressed.
From 00, the screen changes to a screen P600 in FIG. Next, two points on the diagonal line of the color image area to be moved are designated by the point pen 421. At that time, the screen P6 on the LCD screen
As shown in FIG. 10, two dots that are substantially similar to the actually designated position are displayed. At this time, if it is desired to change the designated area to another area, the user presses the touch key a on the screen P610 and designates two points again. If the set area is satisfactory, the touch key b is pressed, and then two diagonal points of the destination monochrome image area are designated with the point pen 421.
Press the 30 touch key c. At this time, the LCD screen is screen P6
In this case, the magnification of the moving color image is designated. When it is desired to fit the moving image at the same magnification, the touch key d is pressed, and the touch key for ending is pressed to complete the setting. At this time, as shown in FIGS. 42A and 42B, when the moving image area is larger than the moving destination area, the image is fitted according to the moving destination area, and when the moving image area is smaller, the open area is printed as a white image. Controlled automatically.

Next, when the user wants to zoom in on the designated color image area and fit it, he / she presses the touch key e on the screen P640. At this time, the screen changes to a screen P650, and the magnification in the X direction (sub-scanning direction) and the Y direction (main scanning direction) is set in the same manner as the above-described operation method in the zoom magnification mode. First, when it is desired to fit the designated moving color image area by the XY-equal auto-magnification, the touch key g on the screen P650 is pressed to reverse the key display. To print the moving color image area in the same size as the moving destination area, the touch keys h and i on the screen P650 are pressed to reverse. When performing manual magnification setting only in the X direction, only the Y direction, or the same XY ratio, the user can press the up and down touch keys to set.

When the above setting operation is completed, the touch key j is pressed, and the screen returns to the standard screen P000 in FIG.
The setting operation of the inset combination mode is completed.

<Enlarged continuous shooting mode> Extended continuous shooting mode M50
0 means that when the original size or the specified area of the original is copied at the set magnification, if the selected paper size is exceeded, two originals are automatically added according to the set magnification and the specified paper size. In this mode, the document is divided into the above-mentioned areas, and each of the divided documents is output on a plurality of sheets. Therefore, by pasting the plurality of copies together, a copy larger than the designated paper size can be easily made.

The actual setting operation is performed first by the digitizer 16.
38 is pressed, the screen P500 of FIG.
The setting is completed by pressing the end key of the touch key a. After that, it is only necessary to select a desired magnification and paper.

<Registration Mode> The registration mode M700 includes a color registration mode M710 and a zoom program mode M72.
0, a manual feed size designation mode M730.

The color registration mode M710 includes the color creation mode M400 and the area designation mode M300.
When the color conversion mode and the paint mode are designated, the converted color can be registered in this mode. The zoom program mode M720 is a mode in which the magnification is automatically calculated by inputting the size of the document and the length of the copy paper size, the resultant magnification is displayed on the standard screen P000, and thereafter, the copy is performed at the magnification. It is. In the manual feed size designation mode M730, in the present color copying apparatus, copying by manual feeding is possible in addition to feeding the upper and lower cassettes.
When the user wants to use the printer in the S (auto paper select) mode or the like, the user can specify the size of the manual feed.

First, the * key 402 as the operation unit in FIG.
When is pressed, the display changes to a screen P700 in FIG. Next, when the user wants to perform color registration in the color registration mode M710, the user touches the touch key a on the screen P700, registers a color on the digitizer 16 on the screen P710, places a document, and designates the color portion with the point pen 421.

At this time, the screen changes to a screen P711, and the number of the registration number to be set and the touch key of the number is pressed. Further, when another color is to be registered, the touch key d on the screen P711 is depressed, the screen returns to the screen P710, and the setting is performed 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 a reading start key of the screen P712, is pressed.

After the touch key f is pressed, the operation is performed according to the processing of the flowchart shown in FIG. First, in step S700, the halogen lamp 10 is turned on. In step S701, the number of movement pulses of the stepping motor is calculated from the coordinates (the sub-scanning direction) specified above, and the original scanning unit 11 is moved by issuing the specified movement command. In S702, one line at the sub-scanning position specified by the coordinates in the line data capture mode is loaded into the RAM 78 'of FIG. S70
In step 3, the average value of eight pixels before and after the main scanning position designated by the coordinates is stored in the RAM 78 'based on the fetched one-line data.
The calculation is performed by the CPU 22 and stored in the RAM 24. S7
At 04, it is determined whether or not the specified number of registered coordinates have been read, and if so, the same processing as in the line is performed to S701. When all the reading positions have been completed, the halogen lamp 10 is turned off in step S705, and the original scanning unit is moved to the H.0 position as the reference position.
The operation is completed by returning to the P position.

Next, in screen P700, touch key a
Pressing (Zoom program) changes to the screen P720,
Here, the length of the document size and the length of the copy size are set using the up / down keys. The set numerical value is displayed on the screen P720, and the% value of copy size / original size is displayed at the same time. The result of the operation is
The magnification is displayed at the magnification display position on the standard screen P000, and the magnification for copying is set.

Next, when the touch key c (manual feed size designation) is pressed on the screen P700, the process proceeds to a screen P730, where the paper size of the manual feed paper is designated. This mode enables, for example, an APS mode or automatic zoom magnification / reduction to be performed on manual paper.

In each of the above modes, the numerical values and information set by the coordinate input of the touch panel or the digitizer are C
Under the control of the PU 22, they are stored in pre-arranged areas of the RAM 24 and the RAM 25, respectively, and are called and controlled as parameters during the subsequent copy sequence.

FIG. 51 shows a film projector (FIG. 24).
-211) shows the operation procedure of the operation unit in the case of mounting. After the film projector 211 is connected, FIG.
406, When the projector mode selection key is turned on,
The display on the liquid crystal touch panel changes to P800. On this screen, the user selects whether the film is negative or positive. For example, if a negative film is selected here, the screen changes to P810, that is, a screen for selecting the ASA sensitivity of the film. Here, for example, the film sensitivity ASA100 is selected. this house,
As described in detail in the procedure described in FIG. 29, by setting the negative base film and turning on the P820 shading start key, the shading correction, and then setting the negative film to be printed in the holder 215,
After the AE operation for determining the exposure voltage is performed by turning on the copy button (FIG. 31-400), image formation is repeated in the order of yellow, magenta, cyan, and Bk (black) as shown in FIG.

FIG. 46 is a flowchart of the sequence control of the color copying apparatus. Hereinafter, description will be given along a flowchart. When the copy key is depressed, the halogen lamp is turned on in S100, and in S101, the above-described black correction mode, which is the operation described above, and in S102, the processing for white correction mode is performed. Next, if the designated color conversion is set in the color conversion mode or the paint mode, the color registration in S104,
The designated color reading process is performed, and the color-separated density data of the designated coordinates is stored in a predetermined area according to the registration mode and the designated color detection. This operation is as shown in FIG. In step S105, it is determined whether the document recognition mode is set. If the mode is set, the scanning unit 16 in step S106-1 is scanned by the maximum document detection length of 435 mm. Position and size are detected. If not set, the paper size selected in step S106-2 is recognized as the document size, and the information is stored in the RAM 24. S
At 107, it is determined whether or not the movement mode is set. When the movement mode is set, the document scanning unit 16 is moved to the document side by the amount of movement in advance.

Next, in step S109, a bit map for outputting a gate signal of each function generated by the RAMA 136 or RAMB 137 is created based on the information set in each mode.

FIG. 49 shows the settings made in each mode described above.
RAM information set in the RAM 24 and RAM 25
FIG. AREA MODE is for each specified area.
Operation in a, for example, each mode of paint, trimming, etc.
Is stored. AREA XY is the original
AREA contains size information of each area and A
LPT is information after color conversion, whether standard color or designated color is a registered color
Information is stored. AREA ALPT XY is
AREA Information on the color coordinates when the content of the ALPT is the specified color
Information area, AREA DENS is the density control after conversion
It is an adjustment data area. AREA PT XY is a color change
Area for color coordinates before conversion in the conversion mode.
EA CLMD is the color mode information in the original or specified area.
Information is stored.

Also REGI The COLOR stores color information registered in the color registration mode and is used as a registered color. This area is stored in the backup memory of the RAM 25 and is stored even when the power is turned off.

The bit map shown in FIG. 50 is created based on the above set information. First, AREA storing the size information of each area in FIG. From XY, from the coordinate data in the sub-scanning direction, X Sorting is performed in the ADD area, and sorting is performed in the main scanning direction in the same manner.

Next, the BIT of the start point and the end point of each area in the main scanning direction The same operation is performed up to the coordinates of the end point of the sub-scan by setting “1” at the MAP position. The bit position at which "1" is set at this time corresponds to each gate signal generated from RAMA 136 or RAMB 137, and the bit position is determined according to the mode in the area. For example, an area 1 which is a manuscript area is T
The area 5 corresponding to MAREA 660 and the color balance designation corresponds to GAREA 626. Hereinafter, similarly, the bit map for the area is shown in BIT of FIG. Create in the MAP area. Next, S109 In step 1, the following processing is performed for the mode in each area. First, an area 2 is an image of a monochrome image for four colors of a document in a cyan single color mode. Even if the video is transmitted during the cyan development of the area 2 as it is, the image of the area 2 is printed with only the image of 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 MAREA5 is set in the masking coefficient register of FIG.
Set the next coefficient in the register selected when 64 becomes active.

[0105]

[Outside 4]

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 whose MAREA 564 is selected by "0". Next, the area 2 in the paint mode
With respect to each of the gate signals CHAREA0, 1, 2,... Corresponding to the bits of the aforementioned BIIMAP area.
3. Data is set in each register of FIG. 18 selected by (3). First, in order to convert all input videos, FF to yu159, 00 to yl160, mu161
To FF, 00 to ml162, FF to Cu163, Cl1
64 is set to 00, and the converted color information stored in FIG. 49 is written in AREA_ALPT or REGI_COLO.
R from AREA_DEN for each color data
Multiplied by the coefficient of the density adjustment data of S, and y'16
6, the density data after conversion is set in m'167 and c'168. For the color conversion of the area 4, the aforementioned yu15
,..., Cl164, each of the density data before conversion in FIG. 49 to which a certain offset value is added is set, and similarly, the converted data is set in the same manner. In the color balance of the area 5, the gate signal GAR
The aforementioned data value is set from the color balance value AREA_BLAN at the time of area designation in FIG. Data is set in the area to be set from BLANCE, which is the color balance at the time of color creation.

In step S109, a start command for the printer is output via the SRCOM 516. FIG. 4 at S110
7 is shown in the timing chart. ITOP is detected and S
111, output video signals C0, C of Y, M, C, Bk
1. Switching of C2 and lighting of the halogen lamp in S112. In step S113, the end of each video scan is determined. When the video scan is completed, the halogen lamp is turned off in step S114.
In step S115, it is checked whether or not copying has been completed. If the copying has been completed, a stop command is output to the printer in step S116, and copying ends.

FIG. 48 is a flowchart of an interrupt process for the signal HINT517 output from the timer 28. In step S200-1, it is checked whether the timer for starting the stepping motor has been completed. In FIG.
X One line of BIT indicated by ADD The MAP data is set in the RAM 136 or 137. S20
At 1, the address of the data set at the next interrupt is incremented by +1.
I do. In S202 RAM 136, it outputs a switching signal _{C 3 595, C 4 596,} C 5 593 of RAM 137, S
At 203, the time until the next sub-scan switching is set in the timer 28. BIT indicated by ADD The contents of the MAM are sequentially set in the RAM 136 or the RAM 137 to switch the gate signal.

That is, every time the carriage moves in the sub-scanning direction and an interrupt occurs, the processing content in the X direction is switched.
Color processing such as various color conversions can be executed for each area.

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

In this embodiment, a color image forming apparatus using electrophotography has been described as an example. However, not only electrophotography but also various recording methods such as ink jet recording and thermal transfer recording can be applied. is there. Also, an example in which the reading unit and the image forming unit are arranged close to each other as a copying apparatus has been described.
Of course, the present invention can also be applied to a form in which image information is transmitted via a communication line at a distance.

[0112]

As described above, according to the present invention, a color processing method can be set interactively by an instruction on the display, so that a convenient operating environment can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a digital color copying machine according to an embodiment.

FIG. 2 is a control block diagram of a reader controller.

FIG. 3 is a diagram showing a protocol of a CPU 22 of the motor driver 15 of FIG. 2;

FIG. 4 is a timing chart of a control signal between a reader unit and a printer unit, a video signal transmission circuit diagram, and a timing diagram of each signal on a signal line SRCOM.

FIG. 5 is a detailed view of the video processing unit of FIG. 2;

FIG. 6 is a layout diagram of a color CCD sensor and a timing diagram of each part of the sensor.

FIG. 7 is a diagram showing a CCD drive signal generation circuit (a diagram showing an internal circuit of a system control pulse generator 57) and a signal timing diagram of each unit.

FIG. 8 is a detailed diagram of the analog color signal processing circuit 44 of FIG. 5;

FIG. 9 is a diagram illustrating a configuration of a staggered sensor.

FIG. 10 is a diagram showing a black level correction circuit.

FIG. 11 is a diagram showing a white level correction circuit.

FIG. 12 is an explanatory diagram of a line data capturing mode.

FIG. 13 is a logarithmic conversion circuit and a logarithmic conversion characteristic diagram.

FIG. 14 is a spectral characteristic diagram of a reading sensor.

FIG. 15 is a spectral characteristic diagram of a developing color toner.

FIG. 16 is a masking black ink UCR circuit diagram.

FIG. 17 is an explanatory diagram of generation of a region signal.

FIG. 18 is a block diagram of a color conversion unit.

FIG. 19 is a block diagram of a gamma conversion circuit using an LUT.

FIG. 20 is a block diagram of a scaling process.

FIG. 21 is a block diagram of edge tension and smoothing processing.

FIG. 22 is a control circuit of an operation panel unit.

FIG. 23 is a configuration diagram of a film projector.

FIG. 24 is a diagram showing a relationship between a control input of a film exposure lamp and a lighting voltage.

FIG. 25 is a flowchart when a film projector is used.

FIG. 26 is a diagram illustrating a PWM circuit and control blocks.

FIG. 27 is a gradation correction characteristic diagram.

FIG. 28 is a diagram illustrating a relationship between a triangular wave and a laser lighting time.

FIG. 29 is a control flowchart when a film projector is used.

FIG. 30 is a perspective view of a laser printing unit.

FIG. 31 is a top view of the operation unit.

FIG. 32 is a top view of the digitizer.

FIG. 33 is an explanatory diagram of a liquid crystal standard table screen.

FIG. 34 is an explanatory diagram of an operation in a zoom mode.

FIG. 35 is an explanatory diagram of a movement mode and a corner movement operation.

FIG. 36 is an operation explanatory view of the area designation mode.

FIG. 37 is an explanatory diagram of an operation in a color create mode.

FIG. 38 is an explanatory diagram of an operation in an enlarged continuous shooting mode.

FIG. 39 is an explanatory diagram of the operation in the fitting synthesis mode.

FIG. 40 is an explanatory diagram of an operation in a registration mode.

FIG. 41 is a functional diagram of the color copying apparatus of the present embodiment.

FIG. 42 is an explanatory diagram of an inset combination mode.

FIG. 43 is a diagram showing a print image when a corner is moved.

FIG. 44 is a control flowchart in the color registration mode.

FIG. 45 is a diagram showing color components of a standard color.

FIG. 46 is a control flowchart of the entire system.

FIG. 47 is a time chart of the entire system.

FIG. 48 is an interrupt control flowchart.

FIG. 49 is a view showing a memory map of a RAM;

FIG. 50 is an explanatory diagram of a bitmap.

FIG. 51 is an explanatory diagram of the operation of the projector.

FIG. 52 is a signal timing chart of each unit in FIG. 8;

FIG. 53 is a view showing offset adjustment and gain adjustment.

FIG. 54 is a diagram showing a memory configuration for misalignment correction of the staggered sensor.

FIG. 55 is a timing chart for controlling displacement correction of the staggered sensor.

FIG. 56 is a view showing variation when a black level is detected by a sensor.

FIG. 57 is a view showing variations when a white level is detected by a sensor.

FIG. 58 is a flowchart of white level correction for each CCD.

FIG. 59 is a diagram showing a truth table indicating a relationship between selection signals C ₀ , C ₁ , and C ₂ and color signals.

FIG. 60 is a block diagram for specifying an area.

FIG. 61 is a diagram showing an area designation and a control signal.

FIG. 62 is a diagram showing correspondence between each bit and a signal name;

FIG. 63 is a view showing an example of a truth table of a selector 175 and an image to be color-converted.

FIG. 64 is a diagram illustrating a region before performing color conversion and a diagram illustrating color conversion in the region.

FIG. 65 is a schematic diagram when density correction is performed separately for each region.

FIG. 66 is a diagram illustrating gamma for color balance and shading control.

FIG. 67 is a diagram showing the flow and timing of signals when performing scaling processing.

FIG. 68 is a view showing scaling and movement processing.

FIG. 69 is a view showing sharpness and edge tension.

FIG. 70 is a view showing extraction of a region.

FIG. 71 is a histogram of an R signal for determining the timing of exposure and image formation by a film projector and the amount of lamp light.

FIG. 72 is a diagram showing pulses of a PWM circuit.

FIG. 73 is a control flowchart when using a film projector.

Claims (1)

[Claims] 1. A color processing setting mode for setting color processing by an instruction on a display is selected, and a color processing method is interactively set by an instruction on the display based on the selection. An image processing method for performing image processing based on a color processing method.