JPS59161983A - Image processing device - Google Patents

Abstract

PURPOSE:To attain the signal processing in response to the selection of color mode and to reproduce color pictures of high quality by reading the lights of plural colors obtained by separating an original picture and performing the picture processings including the gamma compensation, the dither processing, etc. CONSTITUTION:The picture data Y, M and C of 8 bits which underwent the photoelectric conversion by a photodetecting unit 200 and the conversion into complementary colors is supplied to a masking circuit 150 in the form of the 6- bit picture data after receiving the shading compensation (130) and the gamma compensation (140) in response to the signal properties. The circuit 150 performs the arithmetic processing (conversion of data) in response to Y, M and C signals. The result of this arithmetic processing is applied to a UCR processing circuit 160 to calculate the proper BK amount for production of ink print. Finally a halftone picture is binary coded by a dither processing circuit 170 by means of the dither process. Furthermore the multi-value coding process (180) is performed, and the output signal underwent the modulation of pulse width is supplied to a laser modulating unit 300.

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to an image processing apparatus that performs image processing using digital processing. Conventional technology Conventionally, an original image is separated into three colors using a color separation filter.
The original image is scanned for each color separation, a latent image is formed on a photoreceptor using the color-separated light image, and the latent image is developed using a developer of a complementary color.
There are color copying machines that reproduce color images by superimposing multiple colors. This type of color copying machine uses the analog characteristics of electrophotography for color balance, halftone expression, etc. necessary for color image reproduction, making adjustments to image exposure, photoreceptor charging conditions, etc. complicated. Not only that, but corona charging, the photoreceptor, etc. are directly affected by temperature and humidity, resulting in large fluctuations in image quality due to environmental changes. Furthermore, since the entire process from reading the original image 9 to forming the latent image is performed by a two-dimensional optical system, it is not possible to process each point of the image. Purpose The present invention was made in view of the above points, and an object of the present invention is to provide an image processing device capable of reproducing high-quality color images. A further object of the present invention is to provide an image processing apparatus that switches color signal processing and reproduction processing sequences in accordance with the selection of a color mode. Examples] Examples of the present invention will be described below with reference to the drawings.
Explain to 4TI. FIG. 1 is a cross-sectional view of a live imaging device to which the present invention is applied. The original KL"h 1 is placed on the transparent plate 2 of the original image, and from above it is placed on the original cover 3 by 1.11. The condensed light 8 from the halogen lamps 5, 6 for document illumination and the reflective shades 7, 8 hits the document by f1σ, and the reflected light is reflected by the movable reflective mirrors 9, 1o, and passes through the lens 11-1. , after passing through the infrared cut filter 11-2, it enters Kikuro≠Main≠12, where the light of three wavelengths, Pruneau IB), green (G), and red (R1
It is spectrally separated into Furthermore, each of the separated J3, G, and H lights is provided with a blue filter 13. Green filter 15. The red filter 17 performs the intensity adjustment of the three original colors and the spectral spectrum correction, and the solid-state image sensor (CCU) 2
10. P light is received by 220 and 230. The reflected image from the original 3 is illuminated by halogen lamps 5 and 6 for illuminating the original.
The moving reflecting mirror 9 moves integrally with the moving reflecting mirror 9, and the moving reflecting mirror 9 moves in the same direction with a moving speed of 1/2, while keeping the optical path length constant by the moving reflecting mirror 1°, and further moves the lens 1i. -1, Infrared cut filter 1
1-2 and Dike [left and #≠12, solid-state imaging device (CCD) 210, 220° 230 i (m
, is stored as described in biJ. Each solid 1ji′L agony ζ
The output of each CD I will be described later.
) The light receiving unit converts the image into a tick signal, the image processing unit 100 performs extensive image processing, and the laser deflection unit I-300 emits a laser beam modulated by m11'hA to the polygon mirror 22. , rhyme 0 body drum 24. The polygon mirror 22 is rotated at a single speed by the scanner 23, and the laser beam described above can be scanned perpendicularly to the rotational force of the photosensitive drum 240. A photo sensor 64 is installed at the scanning start position of the laser beam falling on the drum.
;0 generates the laser horizontal synchronization signal B I). The photosensitive drum 24 is charged to the removal electrode 63 and the high voltage pump 71, and after being completely neutralized, the photosensitive drum 24 is connected to the high voltage generator 77 and charged to the negative charger 25. Negative consequences have been created. Variable α by both signals
When the laser beam is irradiated uniformly and negatively onto the photosensitive drum 24, a photoconductive phenomenon occurs, and the charge on the photosensitive drum 24 is transferred to the main body ground and disappears. Here, make sure that the laser does not stipple on the light part (r, back) of group j of original treetop ridges, and let the laser dot on the minor part 6 of the original treetop ridge. If you make this 4 pS (! On top of the original drum 24, there are 1116 minutes of liangdou Qiandu (corresponding to the photosensitive name and name translation), and the electrostatic image is formed into an intangible color! 141 people Signal V Koyotsu 1 from JS400, selected, yellow ('f') υ 1 Makishichi:'; 3
b) Magenta 6 kidney 1) Cedar L1 original t; 37. cyan t
cl current 17, 2 cans 38. The photosensitive drum 24 surface is marked with ■.
- form an image. At this time, υll in the developing device of each color
Sleeves 85, 86, 87. In order to set the potentials of the voltages 88 to -300V to -400V, a voltage of '1·iL is applied from the bias generator 84. The toner in the developing device is stirred and negatively charged, and the f< surface 1 position of the photosensitive ram 24 is paddy, and the toner corresponding to the original is transferred to the field D where the image bias potential is higher than the image bias potential. Both acupuncture needles are formed. Then /fg (light drum 24
(excluding position 71 on the surface of) if, 'j-lamp 40
and the high pressure generator 77 causes negative 4f? The small amount of electricity on the photosensitive drum 24 is
The surface potential of the photosensitive drum 24 is made uniform. On the other hand, the cassette roll 43 or 1. is selected from the operation hoard 72. The honshazume stored in t44, paper feed-12
From the paper feeding operation e of 46 or 47, it is fed iS, the jet scoop is stopped by the first registration roller 49 or 50, and the conveyance 0-
951. Ig%2 Registration roller 52 From t'c
j

[The leading edge of the transfer paper is held together by the gripper 57 of the transfer drum 53, and the transfer paper is forcefully applied to the transfer drum 53 by the gripper 57. Jii
The toner image formed on the original drum 24 is transferred to the writing paper 48 by the transfer transfer electrode 54 at a position opposite to the transfer drum 53. The transfer of the toner image onto the transfer paper is carried out by the selection type n7C copy mode, and is repeated a predetermined number of times. The charge on the transfer paper is removed by Transfer a predetermined number of times
f: When finished, the transfer paper is separated from the transfer drum 5 by the separating claw 90.
7. Peeled off from 3 for transportation. By A758,
It is sucked onto the conveyor belt 59 and drawn by the constant it this 60 for 2 it. - The residual charge remaining on the photosensitive drum 24 is removed by the cleaning blade 89 of the cutter 62PJ. Furthermore, the aj on the photosensitive drum 24 is removed by the AC pre-degradation device 63 and the static elimination lamp, and the cycle proceeds to υ. 19.201-1: Discharge the illumination thread using the cooling gradient 1 fan of the optical system. Here, the main body operation sequence is run in four colors (r, ra.
IIIN@processing unit 100. Next, the original short sound is performed, and the three colors (B, G
. R) At the same time CCJ) 210. CCD220. CCD23
I [! II image is read and the image processing unit 100
In, Y and R are required as complementary colors of B, G, and R.
・I will process the BK buttons, glue, and color correction temples of the I, C, and Sumi versions. The short length of the document is scanned four times, and in the first scan, the image processing unit 100 scans the pinned yellow (Yl component of 45
No. 1 is laser modulated to form a latent image on the photosensitive drum 24. this? The yellow developing device 36 develops the h image and transfers it to a transfer paper wrapped around a transfer drum 53. Similarly, the second
In the first scan, magenta is transferred to 11); in the third scan, cyan (C) is transferred; The spectral energy distribution of the halogen lamp for DA iRDλ light is as shown in Figure 2-1. The light output is low at short wavelengths, that is, close to the ili''DA region. In addition, the spectral sensitivity characteristics of CDD are 500~
A high sensitivity of 4 f is applied to the line region of 600 runs.The source of reflection from the N frame is as shown in Figure 2-2, after output from the dichroic mirror, according to the spectral characteristics of the halogen run. In addition, as shown in Figure 2-3, the spectral 4q property of the dichroic mirror is not good, so the spectral 11i property is not good.
By using a multilayer interference filter with a spectral transmittance as shown in the figure, it is possible to obtain a color separation filter that does not contain unnecessary wavelength components, as shown by the broken line in Figure 2-2. . Also, by layering several filters for each color,
, Spectral transmission Jl! ! It is also possible to correct IJ, tI < output imbalance r, as shown by the broken line in Figure 2-2, by reducing the ratio. Figure 3-1 shows a block diagram of the main body control unit. 〇422 and 421 are the operation unit units to be transported for the operation f + - name power), and 422 is the number of copies of the main board. Setting value key, 72-16172-17
The upper and lower cassettes (Tar S1 section 142゜43) are the 3-select cassette selection KA''-, ?2-2 to 72-8 are the color modes for Ka-tawarasha mode'' (i-S1 section 142゜43). 4 F'uLL mode is LIJ'-'617j.
I'll do 6 BL scans 4 times, and I'll do 1 scion vC sentence! 3 HLJ HRIIC color-separated original light image is compared to J6 L-C1, Y, M, C topoo, respectively, and 41! )] In the ski \'n, the BK component V'C of the original image is compared to the color 1, and then developed with BK toner, and the color of f3 is 4.
'1j A copy of the evening color painting by Onose.
) is the first mode. Times++! v(-131”uLL
In the mode of 1-11.3 Iuj (Each FC's of D original scan) Y register Y, hi, C,
(i3K + M) -e-t°, 2 L14
For each scan, BK, M, BK; Y, M, and C are scanned once for each original exposure scan. 072-23, which obtains copies of t') + constant at home, is a 7-segment Lh, D for displaying the number of copies installed. 72-18 is 7 segment LEI with copy number count a)
, 72-15 is a detection device (not shown) for detecting the lack of replenishing toner in the hot spring (not shown). An indicator 72-20 that displays this when a jam is detected by the GYM detection device provided therein is a display 72-20 that displays this when a jam is detected by a detection device (not shown) in the selected cassette. The display tube 72-1 is a weight indicator that lights up to indicate when the surface temperature of the constant low 2 surface temperature of the thermo-pressure radiation device 60 has not returned to the 61 foot 1 level.
Cloth angle, vessel? 2-15, 72-14, 72-20,
72-1 is lit...] initiates the copying operation. 72-21, 72-22 large is a Nagi size caster, and the number of selected awns) 't'3
When the paper is A3 size, 72-22 is lit, and when it is A4 size, 72-22 lights up.
2-12≦・t,, move the lever to 1
When you move it in the direction of
If you lower the lighting voltage and overcome the power 1i11 of 8, you can increase the lighting voltage. The sub-control unit 421 will be explained in accordance with FIG. 3-3 in C scale. 421-14, -15, -16 are γ correction circuits 140 that correct the gradation of the starvation data for the 8-focus pixel data that was sampled by the CCD and stopped by the A/D converter. It is a group of switches that are connected to each other (indicated by *'), and is composed of one rotary digital code switch that generates a digital code. The memory elements are connected to select a data storage memory element having J and one desired γ memory elements from a plurality of memory elements in which M tables are stored. 421-5 to -13 are masking processing switches υ1
．． In the masking processing circuit 150, which will be described later, the coefficients i1 at, bi, ci (i = 1
゜2.3), this is the first step, P4
21-14, -15. -16, the rotary digital chords (consisting of 7 teV koyoshi) that generates digital chord k 5ijs at θ ~ 16''i.
The take deflection for kink processing is as shown in the following equation. Father, 421-1. -2. -3. -4 is ucR as described below,
b In the logic circuit 160, each Y, #i, C,
This is a loader-digital code switch that provides correction coefficients for BK data. Also 421-20.21.22.
23 is a volume that can be attached to the red pressure generator 77, and 7D tun i1 which generates a negative uniform electric current of the photosensitive drum.
The current flowing through r't 25 can be controlled by 1, and this γL can be used to adjust the quality of the color of the temple 1. ). The loads shown in the timing chart of Fig. 3-3, which will be described later, for example, the photosensitive drum drive motor, the static eliminator, the path light 2 lamp, etc.
In accordance with the sequence control table in the OM 423, it is driven through the path of sequence controller → main hold 419 → negative direction drive circuit 420. In the figure, L□, 14...LN correspond to individual loads, but '
The method of driving the 4r load, such as a solenoid, motor, two-ring, etc., and the method of kLuMpc +t > *sequence control are well known, so their explanation will be omitted here. Main control unit 422
．． The sub-control unit 421 has to be used to operate the operating section, which corresponds to various functions, but the only four functions that need to be edited are keys, lamps, and LEDs.
. These '1J7h', +LIJ, or inputs are performed by the key length display controller 412. For example, the driving of the LED, lamp, scanning of the key, and input method are all done using well-known methods, and details are given below.
The progress value of the O sequence that omits the ``1 or d older brother'',
The timing chart shown in Figure WJ3-3 is followed, and this timing chart is set as 1vlJ, Y, 81. This shows a sequence in which a full IJ color image is obtained by aligning three C colors. With this device, upper ge 'Y g M
In order to obtain a full color 1st batch of SC, 45 rotations of photosensitive drum and 10I of transfer drum! l! It is necessary to make one turn,
Therefore, the diameters of the photosensitive drum 24 and the transfer drum 53 are configured at a ratio of 2:1. In addition, this sequence is executed with the rotation of the photosensitive drum 24 and the transfer drum 53 being ai, and as shown in FIG. 3-5, the drive shaft of the photosensitive drum 24 is gear ε4-9)
A sequence clock generated by the driven clock m24-7 and the photointerrupter 24-8i is driven by a drum clock CVC generated as the light-proof drum 24 rotates, and the transfer drum is activated. 53A1
In one rotation, the drum clock counts 400 clocks. Therefore, the load on/off control source is performed based on the count value from the initial (hereinafter referred to as home position) of the transfer drum 53 (not shown). In the timing chart shown in No. 3-4, the numbers indicating the operating timing and non-operating timing are 0?11e1:
11, Kano L lamp 6 v:i, 1is=Zj, 120 counts of clock at 3rd rotation of drum, 1 at 5th rotation
O at 20 counts and 120 counts on the 7th rotation, respectively.
NL, at 118 counts in the 4th rotation, 118 counts in the 6th rotation, and 118 counts in the 8th rotation, it was restrained to turn off. Thereafter, in accordance with this timing chart, the sequence controller 411-65 controls the coherence sequence when informed by the mounting structure 412 of FIG.
%l, a fly, a light drum 24, a transfer drum 53, and m
Rudistrosi 51. The second resist lobe 52 is driven. During the first rotation of the photosensitive drum 24, the bottom surface of the 1st optical drum is neutralized and standardized by the 71 and 71 etc. oJ squares are placed on the platen crow table 2. , 120 clock I of the third rotation of the transfer drum 53, and with the backlighting of the 2 halogen amplifiers 5 and 6 for draft tuna, the i9 scan to the source is started. The reflected light from the original is reflected by the min-9, 7 j:j, and is pre-lighted by the lens iiV to form an image on the light-receiving surface of the CCD 13.15.17.
12, 14. Manuscript 7 whose colors have been polished to G and H
1) The reflected light images of these are incident on the valley CGD13, 15, 17 by δ. The color-separated light image corresponding to the original pail received by this CCD is transferred to the M+1 urinary treatment unit V trowel, which will be described later, after undergoing the necessary real-time data processing. . With the courage of M and C, they finally exposed the photosensitive drum with the laser beam e that was blessed by ' with the above data of both methods, and the image corresponding to the original image was 1'i! Unfortunately, the optical drum J (formed on the surface is as described above.The 7th drum 24 soil was formed in response to the first unreasonable scan of the 3rd-drum 121 timing chart. γ starts operating at the 254th turn of the third rotation of the transfer drum 53, and after the same 4 rotations,
Y to stop the movement with Tarokku 293!
υ子I Rep! The transfer charger 54 stops the operation at 196 clocks of the next rotation of the transfer drum.
53f<Z@@The yellow toner 1φ41%i corresponding to the yellow component of the original is transferred to the attached transfer paper. Similarly, in the 5th, 6th, and 7th rotations of the transfer drum 53, the magenta dovetails corresponding to the magenta component of the original are
At 7.8.9 rotations, the cyan toner corresponding to the cyan component of the original is transferred to the transfer paper IC and Y. In addition, the reflected light image from the paper is dichroic min-12, and the three color components of ■3, et al. 'The name CCI)
It is incident on 13.15.17, but the picture 1st rbt I'1l-C return to form 1 group of yellow retoner planes is,
(''.1 4j'i +j to magenta toner, the image body $C to form a group. To do this, use the G signal for the first time.
s1) C's 1- to 2. Processing is performed accordingly. Immediately, the first Fukigen scan is interrupted, clock 225 fij, I L+ of the 413th rotation of the transfer drum
Then, from the cassette 42 or 43 selected on the operation section,
In order to feed the transfer paper, the easy stand of the upper cassette sets the paper feed loan 46 to 47 in the case of one stage. At the second register stroke 52, the grits' knee 57 of the transfer drum 53 is set at a predetermined timing such that l+'+, l+1 is detected. (-57 is held firmly at the tip, wrapped around the transfer donno 53, and the above-mentioned toner 100 multi-k transfer is performed.Multi-claw transfer is completed at 178 minutes) Eruption from drum 53
The sheet is transferred to the fixing device 60 by the carrying belt 59, subjected to heat and pressure curing, and then discharged. The 11 timing of Kami Ryukoku Ryoujo is the timing chart V in Figure 3-4.
C shows the trace. FIG. 4 is block 1 showing a schematic configuration of the present invention centering on the image processing unit 100. Both (〕g-shoniji:
Unit 100 has 42 colors and CCD sheet thickness is based on the 61 family names of the three colors that were picked up in unit 200.
, the overpressure cargo of 4eS of each of the 4eS books (BK) is output for 1 minute, and the laser modulation unit 30υe is output for each color a. Therefore, the cuff! )I+j ij: to form J 8-j: 4
Color printing (Y, M, C, Bl ())
) 40 runs with the receiving unit 200, 3rd color 1st printing (Y, ht, c) Yang (・Yon ζ 4 Changshu 3 times) Garrison 1--You must stand tall. Stop multicolor jJ
1. f-first s [:p^shi・] f4 u45, ii-
Perform the ``netr sebun'') exhaustion. Both; “, 1, Ta-ki J
-1-unisol r-ioo is 4 from the following Ni1 block
・；・＞ ＋、Besano is doing well. 13]' Engineering CC1)・
1liu ii (F
The shading oscillation circuit that fixes the optical illumination unevenness of No.
: Scan 4o for each number 11 separately. 1406:I:γ
150
O, in the masking processing circuit, there is a large overpressure Y in the ink phase j.
, iyl, poem C. put out Step 160 outputs 1 from K11tk Y, M, C, which is the overpressure generated by RS Runo, in the UCR processing circuit. 170 uses teaser selection in the dither processing circuit! ＋'l
tijM 1mj VR(IJ) 2 Perform fi+j conversion. 18tN-Mata 1:1 conversion process ii:'] In l'6, the dither processing circuit 170 converts it to 211LL! did i+j+
; I: Further pulse width modulation is performed on Yu No. 11, Naka 111]
It has increased its western characteristics to Rui4. Image processing unit) 100 synchronizes these processing circuits and these fI+
111:111 The IJ' control circuit 19071 and the IJ' control circuit 14 are constructed. The CCD father's C unit 200 uses three colors B and G from the Daikurotsuta I2V.
, I separate the colors into I, and 2'L is the part that connects to 4-1;j. The 9 B, G, and ζ that were divided into three colors are CCfJB210, CCDG22(J,
Photoelectric conversion is performed by the CCDL 230. The +G and R signals are respectively CCD driver B24U and (1:D driver G250)
, CCD driver R260 performs 8-bit digitization, and converts υL into Y', M, and C signals, which are complementary colors of B*GtR. Digitalized 8-bit Y, H1, C1 (iu÷Z-
VIDEX) -i, v from I! X)M
, , VIDEX, l C, and want to make a fukoto. V
IDEA)Y, VIDEOM, VIL)EO
C is -7 respectively 1ri lines 271, 272, 273
The shading correction circuit 130t is connected to the shading correction circuit 130 through the shading correction circuit 130t, and the shaping correction described in i*i is performed from the shading correction circuit 130t. Sheeting corrected Y. 8t, c 12i VIDEIJ Y, VID
EOM, VIDEOC is the best L (Kinsen 105
, 106 and 107 to the gamma processing circuit 140. The r correction circuit 140 converts the gradation into characteristics that are easy to color correct. Here, in order to simplify the following processing, VIDEOY. VIDE(JM, VID+C has changed @ to 6 bits (i'i). r corrected 6 bits of VIDEOY, VIf) E(JM,
VIDEOC is iB%flR1081109,
Masking processing LL! via 1i0! The masking processing circuit 150 sends it to the J path 150 and outputs j=,"i VH
)EOY, VIDEOA'i, VIf)hX)
From C to Ingiri, the color 1〉stopped and the color was corrected to V
IiJEOY, VIIJEOM. VLDEOC(Il-Ll(,lR processing J'! times 816
0 hair. In the tJcR processing 4 circuit 160, the color corrected y I A4. From CiCi No. C] - Take out color removal 1 and put it on blank J3. Y, M
, Y, Δt, and C quantity obtained by subtracting EK from C color become Y, M, and C, which have been corrected for color. These four color -original signals Y, Hal, C, BK are '+' with Y I M 4 C, BK CD, ik for each valley eclipse.
Dither processing circuit 170 via L Q' fJ 114
supply to Here, the number L@114 is to receive the 6-bit digital number l+j with the offering number 1 as well as the number 2. This 1st and 5th order Th 1
In 70's, it ranks as a digital VC*! 14i It performs the middle synchronization by the dot control of 9, and there are 3 thresholds (it < 1 dither processing).
, %i+-7iL15-1 , 115-2 , :L
l5-3 V 2 lI+r; Output as -1ti. Multi-f life, transformation 1! :! In l kj+'t180, three 2101 converted 1 self numbers 115-1, 115-2,
115-311CLL, then 4 jb, outputs a signal requesting 116 signals during the pulse, and supplies 21%i of the pulse width to the laser trimming unit. A laser driver 310 and a laser beam unit 320 emit a laser beam and gradually form a beam on the dome 24. The main body fbij yoto 400 is the sequence 91st 1 of heather iron 1
1, and each processing unit's control νC money line 9°, 4-h
・Jetance controller 411-6 in the control unit 400
5 (3rd ㅅ1) is 191 Water Bhutan Ii, )'H
', the first yellow toner '1XII for unit 100! Exposure of the original for the formation of spheres. Cyan 1 for the third time. -1, and the 4th HK French signal, respectively, a
tS4 Figure 403, 404, 406 11-; From the idea q, in accordance with the ink shaft stop circuit 130, go to the opening of the base.
J No. (Shape Inme Start No. 111) 4' 02
Upper side 1 out, sheating correction times f17?
! 1130 (Well, this is what I'm talking about, so I'll tentatively describe it 11 (Z Shefuing 1 (). For cooking, Taku counters 6 against Shiroki Komasaya, and Susyou II! If
I swallow Narc. FIG. 5-1 shows the configuration of the synchronous control circuit 190 shown in FIG. 4. The synchronous jiilJ control circuit is a water circuit oscillator 190-
1. It has a COD successive timing generator 190-2 and an address control unit 190-3, and the beam direction is adjusted every line scanned from a laser scanner. It drives the CCD in synchronization with the protect signal BD321-1, counts serial pixel data output from the COD, and controls the -scanning line address tbiJ. Image transfer lock 2φT19 from crystal oscillator 1901
Clock 0L with four times the frequency of 0-8 and 190-12
K190-4 is 001) Successive timing generator x9-
o-2 and the address control unit 190-3. Image transmission lock 2φ'r190-8 is 1 from COD
This clock transfers the serial image data inputted from COD driver 8240.0OD Drino <-0220, (30
13 driver and supplies it to 260. In addition, the image transfer lock 190-12 is connected to signal lines 101, 119, 120° 121 to each processing circuit in the image source processing unit 100.
．． 118.117 (Figure 4). In the address control section 190-3, the beam detect signal 8
1) In synchronization with 321-1, horizontal synchronization signal H8YNO1
90-5 and 190-11. This signal causes
COD read timing generator 190-2 is 001)B
210,0ODG220. OOD I also outputs shift pulse 5H190-6, which is a signal to start reading 230, to COD driver 8240.0CD driver (1250,0OD driver R260) via signal lines 102, 103, and 104, and outputs one line each. Start.φ1190-7゜φ2190-8, Its 19
0-10 are signals necessary for COD driving, and are transmitted from the COD read timing generator 190-2 to the signal lines 102, 10.
3.104 via 001) Driver B240,00
1) Driver 0250.001) Driver 1 is also 26
Supplying to 0. These (g) will be explained in detail.Address 1Ai)J and 101-1 are 13-pit signal lines, and r -lines are output from aC1) il+r
ii (This signal, which is probably an address line that counts 4752 bits of RkJ, is sent to the shading f4η positive circuit 130 via No. 14 mark 101. Shading start signal 5HI) S1' 401
i, from the main system G'fl fTls 400 to address X fi, (i itl l'll'r 190-3
This is a signal that is input to the software and is generated when the aforementioned white receiving plate 4 (FIG. 1) is scanned. This signal becomes active when the original illumination lamps 5 and 6 are turned on and the optical system is at the position 1ri of the white receiving plate 4. At this time, the address control unit 190-3 outputs a signal sWgxox only in the section where one line of image data for the white front plate is output from the COD.
-2 to the shading correction circuit 13 via the signal line 101.
Output to 0. OOI) VIDEOEN117 is COD
This is a signal indicating the section in which 4752-bit data is output per line from the multilevel processing circuit 18.
o via a signal line 117. FIG. 5-2 is a timing chart showing the timing of each part of the synchronous control circuit 190. 2φT4 is an image transfer lock, and the image transfer lock 2φT is used to transfer the beam detect signal 13DB for each line emitted from the laser scanner.
4, and generates a 1-clock horizontal synchronization signal 118YNO. This signal is also the COD read start shift pulse BH! There is also. φ1 and φ2+= are signals having different phases with a period twice that of the image transfer lock 2φT+, and are clocks for shifting the analog shift registers of the odd and even parts of the COD, which will be described later. Image data signal VI D gODATAj from COD
The first image data D1 is read out from the output of shift pulse No. 81-1 and sequentially J)2. B3.・－・・・・・・
5000 bits are read out, but D1 to D4 are OOD
The dummy is one pixel, and is 475 from D5 to D4756.
Two bits correspond to one line of image data, and the interval CCDvIDEOEN+- becomes active. The signal R8=fi is a pulse that resets the shift register (001) for each shift and is generated at the trailing edge of the image data. The shading start signal 5HDST+-9- is a signal input from the main body Lurie 41 section 400 as described above, and is the signal input from the OOD VIDE of the first line that becomes active.
OEN This is the signal generated in the current section. Next, details of the COD light receiving unit 200 shown in FIG. 4 will be explained. The COD light receiving unit includes a dichroic filter 12 for separating three colors, a P/L/- filter 13 for intensity adjustment, a green filter 15, a red filter 17,
OOD B210 receives blue light, 0ODG220 receives green light, and 0ODG220 receives red light (
30DIL230, and A/D converts these outputs,
Complementary color yellow (1), cyan (Q1 magenta) changes to digital quantity, COD driver B240, CO
It consists of a D dry claw 0250 and a COD driver box 260. Each 000 00DB210,0(3
DG220 and 0ODR230 are mounted on COD driver 8240.0CD driver 0250 and COD driver box 260, respectively. Figure 6-1 shows the structure of each 00D. In the figure, the light +1 that has passed through the infrared cut filter dichroic filter 12 and the spectroscopic Mb positive filter is irradiated as a slit image onto the photodiodes 4) D1 to y03 are also -tD-□. The photocurrent of the photodiode is accumulated in a charge accumulation section (not shown) in the form of a charge proportional to the irradiation time, and by applying a shift pulse MO8SH, an analog shift register COD 5hift l is stored.
(OOD
sh t f t Re g rsl (J
N consecutive clock pulses with opposite phases of Sφ1 and MO8φ2 are applied, and the photodiode RTF and the self-driving electric power source transferred from the cold stocking section (A) are applied to this clock pulse MO8.
φ1. COD sh i f tRe by MO8φ2
It is transferred in series to the output transistor circuit Q1 along the dragon well formed in the channels gl and 2. At the same time, a switching noise component due to the reset signal S corresponding to the image conductivity is applied to the output transistor circuit Q2. This switching noise component is later used to cancel out the switching noise component mixed into the image charge described in 1111. clock pulse M
The image charge transferred to the output transistor circuit Q1 by O8φ1 and M08φ2 is converted here into an image voltage output vS. In addition, the corresponding switching noise component is also output as a switching noise voltage output VH8 by the output transistor circuit Q2.
is converted into. Output transistor circuit Q1. In addition, a reset pulse MO8R8 is applied to Q2 each time one image charge reaches j'iI to the output transistor circuit Q1 and is converted into a voltage, thereby preventing the output transistor circuit Q1 from outputting an image voltage. 6-2 shows a block diagram of a COD driver that converts Ifl and striped images into electrical signals in the embodiment of the present invention. 20
1 is a dichroic filter 12. The COD linear image sensor II~15gN3°202 that converts the image light that has passed through the optical adjustment filter into an electrical signal is the above-mentioned IMS.
A differential input video amplifier V-AMP differentially amplifies both <91' cardiac pressure output vS and switching noise voltage tJ5jf'lN8 outputted from ENS to create a correct image output voltage VIDEO, and 203 is an image output IW. Pressure V'I
A video A/D converter A/D-0, 204 that converts DBO from an analog signal to a digital signal is a reference voltage source V-EF that supplies a conversion reference voltage to the A/D converter 203. 205 to 208 are pulse start amplifiers for operating the IM8ENS201, and 209 is a variable resistor V for eliminating the DC voltage difference between the 11% 1s13N8 output 1...ij image'4 voltage output vS and the switching noise output VNS. I
L 2.210 Ha V A MP (7) j &Lu'
The variable resistor V I (, 1) that determines the JS force is 1. In the above circuit, the four-way output VS and the noise output VNS from the IM8WNS201 are made equal to the current voltage level at the time of the collar signal by ■172. After V−A+s(P
202 ni fJLIt Rare 6゜V-ANiP 202
differentially amplifies the vS and VNS, and the image +59 output vS
7JM of the noise component inside, V i'L
1, A/D-0203 is compatible with human power! S!
Create a Shinai VIDgO. In this implementation step, the dichroic filter 1 is used as described above.
However, due to the characteristics of the Dyke v:1 filter 12, the color sensitivity characteristics of the 00D linear image sensor in the OCD driver, and the characteristics of the light source, the three colors for B, o, and tt are B, G , R are selected with resistors of V 1 and V 2, and adjusted to lower the gain to jγL of Blue, Queen, and L. VI which is an analog signal
The DEO ID number is converted into a digital signal by A/1)-0203. The conversion timing is address ffrt
＋? The timing corresponds to the image transmission lock 2φ'r sent from the n section 190-3, and the VIDEO signal converted to a digital signal is transferred to the 11iii image data processing unit 100 and subjected to various image processing steps. In this way, by adjusting the gain of the amplifier so that B>G>R, it is possible to correct the characteristics of the light source, etc. In this embodiment, the Ijll speed A/D converter conversion D -0
At 203, the reference voltage tXr is 'V-EL'20
1' (, E F. 3/4 b) at output resistance lower than 4
F e i / 2I (F3F', 1/41 is also EF
A reference voltage of +IJ is added, and the terminal φ1. φ2
Each signal of fL S and S l-1 is converted to an appropriate drive voltage waveform using pulse drive amplifiers 205 to 208.
dr 1, MO8φ2. MOS) (, S, 5l
t) 8s1 (After turning, the manual drive is applied. (Shading correction) Section 7-1- shows the 1st revised diagram of the shading correction performed in this example. In the device that reads p14i tj, (by irradiating and condensing the reflected light image with a lens, a non-uniform light image called shading is obtained from the fc distance between the light source, lens, etc.!iX<; In Figure 7-1, the data for both directions in the main scanning direction is 12...n.
...When set to 4756, the amount of light attenuates at both ends. Therefore, in order to correct the shading, the shading correction circuit 130 performs the following processing. This is the n-th image level when 4 is subtracted from 1 by 1.If the 1.111 image level when the image is subsequently read is Lln, the corrected image level jump is h'1AX IJn=Dn Individual correction is performed for each bit so that the following results are obtained: (0-
CCU driver B240.5 is a shading ROM that refers to the shading data stored in the shading RAM K and outputs 'i:ij' when reading an image. COD driver G250゜CCI) The 8-bit l image data read by the driver R is the signal @271, 272, 273. Both image data are respectively shading RArvl] 30-2, 130-4,
130-6. At this time, the signal line 101-2
The address control unit 190-3 (・J's 5-
Figure 1) from Shearing Light Enabler No. SWE
is input. 47hi No. 16 leg 103-3 has an image transfer lock 2φ'
It is manually operated and gated by a Nantes gate 130-20. Output of 130-20 (- for each 7 eding RAM M130-2. 130-4. Write enable terminal of 130-6 WE K + & continued soft 5, white color 1 when reading 1 line ”−
2 Shape-in 6 is stored in these RAMs. At this time, the address signal ADRIOI-1 is set to address system 6.
1 part 190'-3, CCI) output of 4
In addition, 752-pixel image data is stored in the valley shading RAM. CCI) Pair wire 271°27 from light receiving unit 200 to 1
2. Picture method signal VIDEOY output to 273. Vll')EOfVl, VIDEOC are each talented t8
It is a digital coefficient of the signal, and the 'to' bits of each signal are VID sets υ0 to VI DEO7 (LS
We will call it B l1tt'+, ). In this embodiment, the shading RAM 13 for shading data
0-2, 130-4.1'30-6 (7) When storing,
Signal lines 130-8, 130-10. 6-bit digital data VII via 130-12
)EO1~Vll)EO617) Mi'c し、:c
7'Ia';' Each RA as data
Store 1 pixel in M. Shading data is stored in 6
The reason for choosing the pit is that the storage capacity is small and at the same time, the shading characteristics do not change sharply. After storing the shading data, when the original i1' and 5 scans are started, the 1st and 1st area data I Vli)EOY, Vl'[
JEOM. V 1 i) 8 bits of data V for each OC
I I) i bow 00 ~ VI I I) EO7 is 1S-shi 5%
A 13(+ 71 130 9+ 1:(0
Shading correction ROM 1301, 130 through 11
-313 (Manual input is applied to the address terminals Δ0 to A7 of 1-5. On the other hand, shiniding RAM 130-2.): (0-4
The 4752-bit shading data stored in 130-6 is controlled by the address signal ADI 10.1-1, and the 4752-bit shading data stored in 130-1.
5 is output to address terminals A8 to A13. At this time, shading light rice 4 pull number 5 WEIOI-
2 is not active and has shading sleeves +)-RA
M 131)-2,l 30-4.130-6 is lead...j+ work to 0 shading okemasa RO 413o-
1,1:(0-3,i2u()-5, (4-1
) so that the calculation shown in the formula is performed. Q M data f'F: Created, 8-bit both first signal VI
DEOO~VIIJEO7 and 6 Hifu Tonoshi x 7
If the output is shading corrected by accessing the shading correction ROM using the No. 7 data as an address and is output as an 8-bit image signal from the empty terminals 01 to ()8, this is done every time the document is scanned. . Further, this shading correction is performed on all image data. (γ Correction) Next, γ correction will be explained. FIG. 8-1 shows the γ correction circuit 14 ():? : is a block circuit diagram showing il. In this embodiment, γ correction is performed using a reference ROM for each r color, and γI, F! , 'T can choose gender arbitrarily
4et 52. Shading correction circuit 1
3 (signal V I DEO output in 8 bits from l
Y is the signal line 1 from the synchronization control circuit 190 at the launch 301.
Synchronization is achieved by the same amount signal 2φT outputted to 19. The 7 synchronized outputs are input to the lower address 8 bits 1 of the γ correction ROM 3Q2, and the γ correction select signal 403 output from the main body control unit 4()0 to the upper address 2 bits. is human-powered, and according to this signal γ
Select R for correction (head mounting of JM 302. In other words, switch 421 for yellow of the γ value control of the sub-control unit 73 in the main body control section 400
-14 is a 4-stage PWK selectable one, and RO for γ correction.
The data output from the ROM 302 is accessed by a high-speed digital signal input to the upper 2 bits and lower 8 bits of M302 and written into the ROM 302. The data output from the ROM is 6 bits. level. This data is further synchronized by the synchronization signal 2 (7) T outputted to the signal line 119 by the latch 303 . 17) VIL after γ correction is applied to the masking circuit 150)
F; UYm signal line! 1 (output to 18. This 4,
The γ correction ROM 302 converts data of one component of the yellow (Y) signal. Father, jjjj 4't+signal VIri EOM, VII)
EOCK Tweets will also be processed. That is, from the aging circuit 130 to the signal line 106. Image signals VIDEOM and VIDEOCPi output in '107
Synchronization is established at 304°307, and input is then performed at 305°308. And the main system, γWL control switch 42.1-15 of the sub-control unit 73 in +II M≦400,
421-16. The selection signal and the image signal VIDE (
Cyl, V 1: R for γ correction according to il and OC
One area of 131j5, 308 is accessed to O, and γ-corrected 6-bit data is output. V after this γ correction
II)EOO12VIj,)EOCIha is the latch circuit 306. :After the same IUj was taken at 1t19, signal lines 109 and 110? The signal is output to the masking circuit 150 via the same. Next, the sub control unit 7 of the main body control section 400
3 γ value control switches 421-14 to 421
-16 selection and γ correction ROM302, 305,3
08 address input data and output data conversion 1 table will be explained. Here, as an example, the ROM 302 for γ correction of the image signal V I DEOY will be described. γ correction is the density of the original when it is read and expressed on transfer paper (abbreviated as OD), and the density when expressed on transfer paper (abbreviated as CI). ). ) is a pair of −
It is preferable to express it in a pile so that it becomes ``j''.
, the characteristics of the image processing unit 100 which outputs the 1st number obtained from the CCD as a laser modulated signal, and the characteristics of the image processing unit 100 that outputs the 1st number obtained from the CCD as a laser modulated signal, and the output of the laser modulated signal to appear on the transfer paper. The three temporalities of degree characteristics are problematic. This point will be explained with reference to Figure 8-2. V'11)
Represents EOY. 1kyo 4J (No. 1 m: is 0. Since D is logarithmic air water, the image good number VIDEOY is 131;
Ilol, against the concentration, it will be 1 first. This timing is fixed depending on the characteristics of the CCIJγ 210 and the CCD driver 240. Father, the second quadrant is the dither cumulative frequency and C, l) i, l'
, 'represents the J section. Here, the dither cumulative frequency is expressed as the ratio of a certain area (herein, a dither matrix expressed by a dither processing circuit 170, which will be described later) and a developed partial area within the neck area. Therefore, if we take the change in C and D as the dither cumulative frequency changes from 0 to 100, at 0%, C and D are at the white level, and when the dither cumulative frequency is gradually increased from 0 to 100, from midway through The CD has a characteristic of rising rapidly, and at 100 cm, it becomes saturated at a certain density. This characteristic is the photosensitive drum 2
4 and yellow] 4 image 636 and the like. For this reason, unless the image processing unit 100 can change the characteristics shown in the first quadrant, C and D of the third quadrant 11 are required.
and OD's ratio is fixed at a constant rate. Which image processing unit 100 can control the relationship between COD output and dither accumulation try n? γ supplement iE lu for the samurai
l path 14 (1: dither processing circuit 170. However,
The data handled by the dither processing circuit is 6 bits,
If an attempt is made to correct the nonlinear part of the fourth quadrant, the quantum error will increase, and even if the relationship between C, D, and 01 becomes linear, it will not be faithfully expressed. In addition, the input data of the γ correction circuit 140 is 8 pits,
If the relationship between the signals output as the dither accumulation degree η for the output data t or 6 bits 7) and ηl positive or 1 is a linear relationship, the characteristic of the first quadrant is the γ correction ROM 302.
It is determined by the data that has been submitted. Therefore, %
If the order of the dither cumulative frequency for the output of ccI in the 1st quadrant at t is the temporality of A from γsli jEK, the relationship between C, D and ()D in the third quadrant is as follows for A'. Like 1;
Compost corresponding to 1 can be made. Next, as an example of the olfactory body in the table, Table 1 shows the contents of the ROM 302 for gamma correction. The upper 2 bits of the address indicate its characteristics, and A if I-o<month. "01" represents B, rlOJ represents C, and IIIJ represents D. When the yellow image signal V I DEOY is input to the lower 8 pits, 6-bit data as shown in -&1 is output.In this way, the CD and OD 1-2 systems correspond one-to-one. sell. Father, like B' in the 3rd quadrant, copy copy [C with characteristics of low CD and high contrast characteristics]
′ and the fog characteristic D′, the copy density C
D is made possible by selecting the gamma correction switch 421-14 of the sub-control unit 73. By applying the gamma correction circuit to the yellow signal characteristics in this way, high-speed and faithful copying becomes possible. Similarly, when the macenter 1■ and the cyan C signal 1' got stuck, this characteristic was [,1 reason 1(1v) can be selected (and needless to say. ■It can also be controlled by the partner of the correction circuit 140 and the dither processing circuit 170.As a specific example,
and the output signal VIDEOY after adding shape ink.
Since this is not a linear relationship, the correction ROM 302 corrects the VIDE signal 4.
The signal is changed so that the OY signal is proportional to the original concentration using the method described above. Also, r +m corrected V I I')k;0 signal f! :4. - Dithered surface from No. 4 fiber 114! 4170 is VNovember'
=0 Dither processing surface Rr which is described so that the reconnaissance density CL) is proportional to the @ number.
1 is also uf-no. (Masking) tl:Ij柘1] Coloring materials such as ink or (okay, toner)
'+'k'-1% component reflection basin 4 shown in Figure 39-1
1. Also in νIJ, the Y (negative) coloring material absorbs 400 to 500 former 11 r9 and reflects s 500 nrn-f. ;Vl(
Magenta) coloring material absorbs 500nrn to 600nm glue °e and reflects everything else, C (shear/) is 60
It absorbs the element from 0 nm to 7QQ nm, and totally reflects the rest. - When developing with 10,000 and Y color materials, the reflected light from the 5 clouds is reflected from the blue (I8
) $ formed by 1°C of light separated by color through a filter
111 K was developed, and in the same way, the M color @ was developed using a green ((j) filter, and the C colorant was developed using a red (also 1) filter. As you can see from both figures, 11.
The filters G and L are each 5 Q Q nm,
600nm' as a boundary, TES ratio' + 2 %, color component distribution is good, while color 4 o's +) original reflection name t, wavelength-dependent component is 0 Samurai ν Cis 4 (magenta) contains a considerable amount of Y (yellow) and C components, γL, and C (cyan) also contains some M and Y components. L, te, with the above coloring materials, if you use the coloring materials, you will get s (
+! Photography color - image becomes cloudy. Therefore, we corrected this by applying wiring, printing and masking techniques. This means that if each color component manually applied to the masking thread is Yl', 4~11°CI, then the output color is Yo, ,'l'IO,C
. Purple, the following formula % formula%)
” ) (' ” 1°2.3) is set to ko1, it is possible to correct the upper i4+; 5% IO, Figure 71 shows the r+N details of the masking processing circuit 150 and the VCR processing circuit 160. 1
Ladle K > Ite, l 50-Y, 150-M, l
50-CTI, yellow (Y), magenta (, >4
), is a masking processing unit for image signal 0 of Nijian (C), and is a masking processing unit (masking department, f-powsha) iB150'Y
Detma, No. 18, ρ1. 6-bint Y component video output through the '-1o8 channel No. 11; No. VfD)ho Y
s (i4 @ I Pass] -09 via 1'C1,1,+
Car alL 66-bit M component Bigo Inertia VI
JJ 1<S2゛\4 upper i5'14 bit, signal line 1
6-bit F ノ (− component and −77
1-I @ J V I I) k (J CO upper j, 7, 1
: 4 Hira I-, it(')゛L Y's, M
As s, (-violet), equation (3) is fully realized.Color data for correction, for example, (・,↓In equation (3), j\4i
, Ui, ! -41 formula: Yl, Ci, f5
, 1 in equation 1, Yi, ~ 11 is the corrected data Yi,
hlr, Ci Compared to VC, there is no need for high ellipticity ↓, and the coefficient (al, ') +) (' ””1,
2.3) As will be described later, 1/16.2/16.・・・
... Since there are 16 steps up to J and yt B, the corrected Rata, Y
i. For each bit, C1, 6 bits, each bit is reduced to 4 bits. Also, by this, it is possible to reduce the capacity of the ordinary orvt (described later) by 1/4 it. A block circuit diagram showing unit 150-Y in detail.
・Ngtaheri Unit 1 50-M. Since 150-C is the same circuit, it is 150-M. 1. Explanation of 50-C (・J, 1 omitted. Referring to FIG. 9-2, the masking processing unit receives 6-bit Y data and signal 1 via line 150-1.0 and line 1i8.
4 bits for in1 positive [\1 data, 1'n'' fj Mt 150 14 through lines 150-12 and 4 bits C data and signal 1τ, and il15fJ-11,1
Knee 9'-
4-bit code data set by SYY I 5yp
A-Syc is input. The code data [0) + r(F')n of O SYY s "YM + SYC" respectively give the coefficient (aI + bl + CI') in the formula l), and the digital code switch f42] -5 ~ 421-13 is N,!: Then, the coefficient is given by N7167
Siruru 50-1. ] 50-2°150-3 is
This is a ROM that performs the 1450-1 value 6-bit Y signal and 4-bit code data SYY.
l, /k Lc(J fz4 ) 7 L' f-type 11Z L, specified by this address. 14. Oi
For \1 data, the role value of 4 bits is also 21n and 7', Dy = YO2)it x p+/l 6(Y
= (Jn~3p', I, nr=OH~f, 'lI),
Loot with 6 bits! '17Σ is gone. Same, tumor 15 (
1-2 is set with 4-bit code data SYM.
For 7iIl, D+ll = i'vL bit X n / 16
At Ushita 150-3 (r Yu, lJc for the set value l)
C4bit X il 16 is stored and 4. -shi, "m + I)., are each 4 bits. Here, each 1 "-ta"j + 1) Ill. 1). is one word 4p 150-1 ti, I 50 −
17+ 150-IN busy output. Then, subtracting these data using equation 1(3) gives 1)21)y-1), 1-L). The value obtained in is now shifted from the video data of Y (if,
Regarding Y, the oil stopper of formula (1) can be achieved. Ma1ζ, f
\4. If C is set to 1, the oil stop is set to 7 (i.e., above, above, 6-bit Y data, 4-bit oil stop each).
IIIJ, C datattzs i'J')-1, Lo
ha 151)-4 connected to the address bus Lλ;
015051': J, 6-bit ψF data whose numerical value is prefixed by 9 for masking processing 〒1 A latch element that latches in synchronization with the 1722 wheels of video transfer. be. (ui'j=
○Usually, when color reproduction is performed using the subtractive color mixing method, for example, Y'
, hi, When C is ignored, all spectral components are absorbed by the other system, and black (BK) is reproduced. Therefore, in the fJ K part of j6 image, Y, M, and C toners are equally spaced to 11L. However, Y, ~1. The spectral reflection amount of toner C is zo! 9- As shown in INN, the color separation by wavelength is poor.
It has already been mentioned that the Y toner contains some H4 component and the C77 toner contains a considerable amount of Y component and C77. 9R Tsute I
- For DZ, use black toner to avoid color stains.
Using black, kp+I-min is 4(Y corresponding to i, i\,
It is better to keep i and C toners better, and this is exempted from F.
(tJ CIL ), and is performed in block 160 of 1t)-113,81. Signal line 160-313,
160-31, 160-32 from the %11nnf masking circuit 150, the Y, M, c6-bit image data is first subjected to comparison 5160-1. l 60
-2. l 60-3, respectively, Y and 84. N1
Compare the size of C9C and Y. The comparators 160-1, 160-2, and 160-3 select the minimum value among the image data Y, +Vi, and C for the latch times j! 5160-13.160-14.160-1j
5, in order to latch them, we perform all the size comparisons to determine the size of the Y, i'vi, and C image data.
C1 Between signals with signals like the table in Figure 10-2! 160-
33. Output to 160-34, 160-35. That is,
Y per pixel, Δ4. In the C-print r-piece data comparison, when Y is the minimum, "0" is %'1 on the signal line 160-33.
Similar to No. 14, 160-35 has "1", and similarly when L\1 is the minimum, No. 18 is approximately 160-: (3 to l", signal line 160
-34 is 10", and when C is the minimum, signal line 16 Lee 3
11" is output to 4, and 10" is output to A-string t6o-35. When Y,=M==C, it is represented by itM of y.The three comparators 160-1.1
604160 3, Y, iνi, e's l: 1 small
The pardon is declared and the latch circuit 160-13.160-14
．． Im No. g' from 160-15? This 4VJ is output to J16υ-36 and becomes the basic data for inking. Another latch circuit 160-10.160-11.16 (J-
12 are Y, M, output from the masking circuit 150;
Image T data of C is transferred as an image, latched with ``2'', and the calculation for the next stage of reduction A is performed OM 160-16. l 60-1
7, output to 160-18. Also, No. 13 Kotosen 60
-: (The aforementioned basic data for inking (BK
) through the selector 160-20 to the signal line 36 (+-
37 multiplied by the coefficient value given in 4 bits % - ROM16
0-19 multiplied by q, shi, obtained lHn k x BK
The upper 4 bits of the 6 bits (i+'j, 'ec
, 1s issue, J160-38 "'(2%R Minoh ROM
Output to 160-16°160-17, 160-18. ILOM160-16, 160-17, 1
In 60-18, this value is subtracted from each image data,
The result is sent to the selector 160 via the signal line 16039.
-211C output. Selector 160-21 has the power j!
? ■ Also from 0M160-19 signal Ill 1 (i 0
-38 and enter the 6-bit 7.4 input data manually. These 1 stroke 1 elephant immortal number are controlled by the main body control unit 401).
Output via Po line 405f, Y', isi,
C, I3 and number 1.1 Sg L 111 (* 6E
L k-* b E L M + +) 1. The necessary image 11F data is omitted by C, and -Hirefta J60-
The output is known as No. 43 of 6 bits from 21. In this case, the selection signal SFi L' (+8t
L M, IL C, IL BK, Y. 8i, c, BK, 1#1 color corrected) This picture 1
Elephant arta is selected. For the basic gator of 1%13I, the coefficients to be bundled are 3-1F figure main body iLt:J control part 1 step control unit 7:3 swing f@421-1 ~ 4 This is the selected coefficient, which is also 4:,)! output from the main body control section? iil Ki switch group; command selection signal 4 (1!i-9,405-10K') 314
The selection signal is applied to the multiplication ROM 160-19. upper fi
＋Co-explained, just like the real example of LJ Cl(,
In the circuit 160, it has a % color component like t1 1st O-3FII7): for a surface element, its
1st place! For example, for Y, 11c[, which is 1-centered with a certain coefficient 1(), is added as BK, and Y becomes (
y-Bi<), I~1 is (, tIIi-B K ), C
(C-r-th ()) is used as the final color component -j-. The multi-gradation processing in this implementation consists of dither processing and multi-value processing.An example of dither processing is shown in the 11th
Shown in Figure ζa). In teaser processing, when a 6-bit 64-level (0 to 3F) digital image signal is binarized, the threshold value is changed within a certain area, and the area ratio of the number of dots within that area (hereinafter referred to as the teaser matrix) is calculated. The gradation is obtained by A in the umbrella diagram (a) is 2. <The dither matrix of 2 is used to change the threshold value to 8, 18, 28, and 38 degrees for each dot. 0 to 0 of digital image signal Dn
For the value of 3F, if m +y is binarized and the white background of the figure is 01' and the diagonal weave part is 1, then ta) - (0) ~
(5 gradations can be obtained as shown in (al-(4)).The dither matrix can be used to increase the Ril shield W field number, but on the other hand, the m-value of the 1ril image becomes worse.Therefore, in the case of non-invention. The ii&!i chord is further divided, and the gradation is increased by changing the pulse width (0 and 1). No.:1101
An example is shown in which 4-value dithering is performed by changing the pulse width m-a ffi into 3 parts (bj), 1 dot is divided into 3 parts by the dotted line as shown in the figure. In other words, 4 Pm ta at l dot.
It is possible to bend the m1 stem ratio of. If three more thresholds are given in each dot of the 2×2 dither matrix as shown in B in diagram (b), then tb) - (o) ~ (
13 gradations are produced as shown in (12). By emitting laser light only in the shaded area of the numeral map (b) in such a multi-gradation binary code, an image with gradation is obtained. In the case of a ternary dither matrix, the υ matrix is changed by dividing one dot into two. This is a block circuit diagram showing the details of an unrealistic processing circuit i5180. In the figure, the main body structure 1 is also 54 o
The 2-bit A old name YNICBK O (A 1
0), YMCBK 1 (Al l) to judge which color should be treated with 2 □ A,. Dark IA, if I=1, Y (yellow jA+o=
I A++= 0n M (Marvin Kula Ato
= OA++= 17.7:ra C(cyan 9A+a=
OA++= Oj:ra B1 ((assumed to be BRATSUTANO. Also, the switches $W1 to 3 are the switches for selecting the gradation, and the contact point of a, b2'':) is the switch S for ij.
W 11. (By turning on, it is possible to divide one dot (11-3) of the dither matrix. By turning on the switch SνV2, it is possible to divide one dot of the dither matrix into two. 1, SW
1 on. Consider the case when SW2 is off and SW3 is off. in this case,
Dither ROMA-C is selected with the lid ξ 1, Video Tsukuji No. 6
Dither ROM with bit (64 level signal)
Address oo, oi at address 00 of A ('[03,02:t
06.03 at iT, 09 at Kurachi, 12.2 at 20th.
15 per province. ......, Dither ROMB 00
Kurachi 01, 01 Kurachi 04゜02 Kurachi 07...
-... Store Daza Bakun gold in DZROMC's 00 storage area, 02.01 area, g 5.02: i + p area 08, etc. rj8+ of the circuit operation under the above conditions! do light work In this state, if the video signal VIDEOO~5 is 04, then dither 1ζ (HJiA's 00 warehouse 1/co valley 0
When compared with 0, bidet No. 1p+ is larger, so the output Q of latch A becomes 1", and at this time the dither ■
Since the video signal is larger than the value 01 of ``00@1'' of tomn, the output Q of latch B is 1''.Also, the output Q of latch B is 1''. Since the video signal is larger in comparison, the output Q of the latch C becomes l#.In synchronization with the other 1ijiij image transfer lock WCLK, compare it with the content 03 of the dither ROMA's 01?r area. The output Q of the latch A becomes 'l#'. At this time, the output Q of the latch B becomes '0' since the content 04 of the 01 field of the dither box OM and B is equal. Also, at this time, the dither ROMC is 01, and the content of the iEt area is 0.
5, the output Q of latch C is 0#. Dither ROMA, B in synchronization with \VCLK like this. C valley 02 eii-chi 03 strange land, 00 valley + 01
Compare the contents of tlr location, 02 location, 03 location, and 00 location and answer 4'j At A4, the output Q of latches A, B, and C becomes "O" or "1#. At this time H8YNC (When the own code is entered, the address counter B170-8 counts up by one and synchronizes with WCLK.
Perform a 1ii+j order comparison with the contents of addresses 2, 23, and 20'a. Tsumashi gaka transfer rock VJCLK period 1. ” Address counter A17O-7 (lower address) (×θ Kaji ~
The address counter B17O-8 (higher address) counts up to 1 (every time SYNC is input)
(OX iS' land, 3 x ding lj land) counts up. The latches at this time are Al70-4 and B17U-5. Each output of C170-6 is the image ζ1ζ feed stitch WC
By counting and amplifying the address of line address counter C180-7 in synchronization with LK, line memory A180 9. B18O-10, C180-11 store 'j''L. At this time, when the H8YNC signal is input, each output of launch A1704, B170-5.0170-6 is stored in line address counter D180-1 in synchronization with WCLK. By counting up the address of 8, line memory D180-12.E180-13, F18
Stored in 0-14. Line memory D 180-1
2. E180-13. F'l 80-14 to WCL
While the contents are sequentially stored in synchronization with the signal RCLK from the oscillator circuit 1. Line address counter C180-
7. By counting up the address of the read address counter 180-5, the data selector 180 is sequentially read.
- Sent to 15. The count-up of the read address counter 180-5 is started at a certain timing, in order to form an image at a fixed position on the drum, the start of image formation j-d is delayed by a certain period fdj after input of ii5yNc. Therefore, until the value of the left margin counter 180-6 reaches the fixed fii7, the read address callan J1180
-5 count up is prohibited. Line memory A, B, C or I) after the toe 9 prohibition is lifted.
Data selector 180 15G for Pi contents of E and F
C sends Φ. This data selector 180-15 inputs f A
i: Since it is connected to the J and B sides, the output of the data selector 180-15, the same 11 as the RCLK for the 16th child, and the line memory A180-9゜8180-10. C1
80-11 Also Q, L line memory D180-12. [
This means that the signal stored in either F180-13 or F180-14 is always output. The multi-level oscillation circuit 180-16 has contacts S W 1-b (4
When oo-6) is ON, the image transfer lock WCLK is activated by three masters as shown in Fig. 13. Divide the portion into φB and φC and do it) A180-17
, ANDGATE B18O-18, ANDGOO 4C180
- Send to 19. As a result, data selector 180-45
Outputs Y, , Y, , Y, synchronized with 0RCLK are gated at A, B, and C, respectively. Next, input the conclusion to OR gate 18G-20,
By turning on the laser with the output signal from the OR gate 180-20, the area to be irradiated with the laser can be increased to 41 areas depending on the size of the VIDEOO~50 number manually input to the comparator during one wave of WCLK. ! You can create 41 that changes to 1 (1 does not irradiate at all, 2 RCLK 1/1)
3 time irradiation, 2/'3 time irradiation of 3RCLK, 4)
Simultaneous irradiation at 3/3 of RCLK). FIG. 13 shows a time chart of the signals explained above. To explain the signal in p) degrees from top to bottom, B, D-...
・H8YNC that occurs every time the laser beam scans the drum ・・・・・・・・・・・・・・・・・・・・
・While B and D become H, the original φ1 is broken 1 while it is H.
■ VIDEO ENBLE = Laser output that stores the video signal in the line memory after this signal is moved 1° in the direction of H to the line memory.・“1” One image transfer lock that irradiates the modified sawyer light onto the drum only while this signal is H... Dithers in synchronization with this signal φ, ・・・・・・・・・・・・・・・・・・・・・・・・・・・・
・・・－・・・・Synchronize with this signal and take out all code numbers from the 10th line memory φ^, φB, φ(−・・・・・・・−・−・−・φ
Synchronize with 1 and take it out from the C line memory and input it.
No. ke 3: Branch out. Next, a case will be described in which the area irradiated with the laser during the image transfer lock WCLKI wave is changed to 3 Zenchi. In this case, switch SWI-SW3 is SW+ OFF
, 8w2ON -SWs OFF. Other conditions are sw, ON, sw, OF F, SW
This is the same as the explanation for 30F'F. Under this condition, the dither ROM is D 170-12 E 170-13
Write address counter 180-1 selected
, Read address color/re 180-5 Left margin counter 180-6. Switching circuit 180-2. Address counter C180-7, address counter D180-
The function of 8 is exactly the same as the previous explanation, so it will be omitted. V
I D E Oo −s and dither 1<, OM
1) The result of comparing with the contents of l 70-12 is latch A.
Data selector 180 via 170-4 line memory A180-9 (or line memory D180-12)
I+i* input to terminal Ao (or BO) of -15
Be ■11) EQl~. The result of comparing with the contents of dither ROtviE17'0-13 is latch B 170-5 line memory B 180-
10 (or line memory E 180-13) to red (1
1 is input to the terminal AI (the father is Bl) of the data selector 180-15, while the multi-channel oscillation circuit 180-16
When SW2° is ON, the signal RLCK is changed to % as shown in FIG. 13, and the two signals φ9. At this time, φ is divided into φ8. iJ: remains in the state of 0. As a result, the output Y of the data selector 180-15 is synchronized with RCLK. + Y
'1 is AND gate 180-17, 'AND gate 1
Gated at 80-18, respectively. Next, take the OR at 180-20 and turn on the laser f with this signal to convert the result to 1III.
Depending on the magnitude of the signal manually applied to the conopalator between one plate of the image transfer lock We LK, the laser beam can be changed to 74 (((The area irradiated by the laser can be changed to 3). 1) No irradiation at all ■1 (CL
K (1 at D1/2! J irradiation ■ RCIA < (7)
2/20 hours + RG shooting). Next 1! ! 111y forwarding lock We will explain the Toto 2 combination which changes the area irradiated with the laser to a group of WCLKI waves to 2 or Kochi. In this case, SW1~s r, i, s 8%
OL+'l喀'. 5WyOF''h', SWs ON.Other Sakae 1 points are SVV+ON, 8% Of'k'
v SWs OF'P (') Same as the case. Under this condition, the dither ROM is dither ROM F 170-
14 is selected. Write address counter 180
-1, read address counter 180-5, left margin counter 18 (+-1i. switching circuit 180-2, address counter C180-7
Address counter D 180-8? ,'uJ+1
Since it is exactly the same as Mil's explanation, I will omit it. VIDEO, ~, and dither) Komazu compared with the contents of ζOMF170-14 is latch A170-4 line memory A
It is input to v' tin AO (or B) of data selector 180-i5 via 18O-9 (or line memory D 180-12). 10,000, Tahaniwatsu 6 strokes lL! Circuit 1n-16 is 5W3-5
Y when it is ON. is “1” + Y1'/:K
"0°', Y, rj Since the state of "0' does not change, it is rotated to +tcLK and the result is AND gate 180-
17, then OR at the Mare gate 116. By turning on the laser with this signal, the laser is irradiated depending on the magnitude of the VIDEO0~ signal input to the comparator during one turn of WCLK. Also, do not irradiate light 1. ! ;-'s i"I' Cshi (results in changes to the content. Manuscripts to be copied can be roughly divided into three types as follows: 1. Those with only pictures, and those with only 2゜ characters. ,6
゜A mixture of pictures and letters. Furthermore, paintings can be further divided into those with subtle colors, such as photographs, and those that are composed almost entirely of primary colors, such as manga and picture paintings. For photographic originals, by converting them into multiple values, the gradation is improved and subtle color changes can be faithfully reproduced. Furthermore, for manuscripts that are almost exclusively in primary colors, such as manga or coloring books, by converting them into two values, it is possible to express clear colors without muddying the colors. Characters are also expressed as sharp black and white images with no intermediate density, so optimal image reproduction is possible by changing the switches sw1 to 8W3 depending on the type of document. The switches FM1 to SW3 are turned on and off by switching the switch 421-24 in the sub-control unit.
When the scale is set to 2, the switch Ea1 is turned on, when the scale is set to B, the switch SW2 is turned on, and when the scale is set to 2, the switch SW3 is turned on. Note that although this embodiment has a configuration in which images are recorded using a laser beam, the present invention is not limited to this. For example, it can be applied to inkjet printers and thermal printers. Furthermore, the masking process and the UCR process may be performed in any order. Further, the B, G', R, and signals may be transmitted from the memory of the host computer or the like. Alternatively, each data of Y, M, C, and B may be stored in a single page memory or the like and subsequently output. Further, in addition to recording on transfer paper or the like, the configuration may be such that the information is filed on a disk. Further, in this embodiment, multi-gradation is performed using a time-division signal, but it is also possible to perform multi-gradation using brightness modulation or the like. Effects As described above, according to the present invention, since the characteristics of the color separation means can be corrected by adding a filter, high-quality color image reproduction is possible. Furthermore, γ correction and multi-gradation make it possible to reproduce a color image that is faithful to the input information. Furthermore, since the signal processing and reproduction processing sequences are switched according to the selected color mode, image reproduction can be performed in the minimum necessary time.

[Brief explanation of drawings]

Figure 1 is a sectional view of a color copying apparatus to which the present invention is applied, Figure 2-1 is a diagram showing the spectral characteristics of a halogen lamp and the spectral sensitivity characteristics of a CCD, and Figure 2-2 is a diagram showing a dichroic mirror and a multilayer filter. Figure 2-6 is a diagram showing the spectral sensitivity characteristics of a dichroic mirror.
Figure 2-4 is a diagram showing the spectral characteristics of each color filter, Figure 6-
Figure 1 is a block circuit diagram showing the main control unit, Figure 6-2 is a block circuit diagram showing the operation unit of the main control unit.
-Figure 6 is a diagram showing the operation section of the sub-control unit;
3-4 is a timing chart showing the operation timing of each part of the color copying apparatus shown in FIG. 1, FIG. 6-5 is a diagram showing a schematic configuration of a sequence clock generator, and FIG. Figure 5-1 is a block diagram showing the schematic configuration of the synchronous control circuit, Figure 5-2 is a timing chart of signals in the synchronous control circuit, and Figure 6-1 is a drawing of the CCD. Figure 6 showing
Figure-2 is a block diagram of the CCD driver, and Figure 7-1 is the CCD driver block diagram.
Diagram for explaining the light amount distribution on the CD surface, No. 7-
Figure 2 is a block circuit diagram showing the shading correction circuit.
Figure 8-1 is a block circuit diagram showing the γ correction circuit;
FIG. 2 is a diagram showing the relationship between original density, CCD characteristics, image processing unit characteristics, and reproduced image density, and FIG. 9-1 is a diagram showing the relationship between original density, CCD characteristics, image processing unit characteristics, and reproduced image density. A diagram showing the spectral reflection characteristics of toner, FIG. 9-2 is a block circuit diagram showing a masking processing circuit, FIG. 10-1' is a block circuit diagram showing a masking processing circuit and a UC processing circuit, and FIG. 10-2. is a diagram showing the state of the signal output from the latch circuit depending on the size of image data, Figure 10-6 is a diagram for explaining UCR processing, and Figure 11 is for explaining the principle of multi-gradation processing. Figure 12-1 is a block circuit diagram showing a dither processing circuit, Figure 12-2 is a block circuit diagram showing a multi-value processing circuit, and Figure 16 is a block circuit diagram showing a dither processing circuit.
．． 12-2 is a timing chart of signals in the circuit shown in FIG. 12-2. In the figure, 100 is an image processing unit), 130 is a shading correction circuit, 140 is a γ correction circuit, 150 is a masking processing circuit, 160 is an OCR processing circuit, 170 is a dither processing circuit, 180 is a multi-value processing circuit, and 190 is a A synchronous control circuit, 200 a CCD light receiving unit), and 300 a laser modulation unit. Applicant: Canon Co., Ltd.
Ino (2)B
(0) (1) (2)
1B<Dn≦10 (D<Enter 22 Otsu x D area 3
2 32<Island≦Feather(3) (4) (Yo) (4) rXDn≦'+2 f2<C)tz≦1822<
C? l≦28 28<Dn≦2D kDn≦3D
3〆h≦Continued from page 1 0 Inventor: Mitsuo Akiyama, Canon Co., Ltd., 3-30-2 Shimomaruko, Ota-ku, Tokyo 0 Inventor: Yoshinobu Mita, Canon Co., Ltd., 3-30-2 Shimomaruko, Ota-ku, Tokyo In-company July 1988 Pin Date Kazuo Wakasugi, Commissioner of the Patent Office ■ Display of the case 1988 Patent Application No. 36517 2 Name of the invention Image processing device 3 Relationship with the person making the amendment Patent issue 4n Resident Te 3-30-2 Shimomaruko, Ota-ku, Tokyo 4 Number: (100) Canon Co., Ltd. Kiya 7 Co., Ltd. (Telephone 758-2111) 5, Date of amendment order: June 28, 1980 (Shipping date) 6 , Application to be amended and details, Contents of amendment (1) As shown in the attached document, after the name of the agent on the application, clearly indicate S.
Stamp C. (2) Engraving of pages 1 to 3 and pages 71 to 76 of the specification (no change in content) 7

Claims (1)

[Scope of Claims] (1) A reading means that simultaneously separates an original image into light of a plurality of color components and reads each of the separated light of each color component through a filter of each color, and a reading means that reads the separated light of each color component through a filter of each color, and according to the output of the reading means. An image processing device comprising: an image processing unit that performs predetermined processing. (2) a γ correction means for correcting the gradation of color data; a dither processing means for reproducing the gradation of the color data γ-corrected by the γ correction means; An image processing device comprising: a selection means for making a selection. (6) A device for digitally processing and reproducing a color signal, comprising means for generating a color mode selection signal;
An image processing device characterized in that the color signal processing and reproduction processing sequences are switched according to the selection signal.