JPH03230679A - Color picture processing unit - Google Patents

Abstract

PURPOSE:To execute the best picture processing in each operating mode by providing a color code generating section having plural operating modes and outputting a color code suited to each of the plural operating modes. CONSTITUTION:The unit consists of input terminals 1R, 1G, 1B, a density conversion section 2, a color reproduction section 3, a selector 4, a single color reproduction section 5, a color code generating section 6, a color code correction section 7, a picture discrimination section 8, a color ghost correction section 9, a marker color conversion section 10, a filter processing section 11, a gradation correction section 12 and a printer unit 13. Then the color code generating section 6 has the plural operating modes and outputs a color code suited to each of the plural operating modes. The color code is used and the picture processing is implemented. Thus, the best picture processing is implemented in each operating mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to a color image processing apparatus that forms a color code from a color read signal and performs image processing in accordance with this color code.

[Background of the Invention] Conventionally, in a color copying machine, it has been proposed to form a color code from red, R, green, G, and blue B data read from a color original image, and to control image processing according to this color code. There is.

For example, in the four-color full-color mode, the intermediate and chromatic color codes "Ol" and "IO" are required. The intermediate color code "Ol" is
In the end, it is used after being modified to black (achromatic color) or chromatic color coat "11" and "10J".

In addition, in marker mode, which has a function such as converting a black area within the area surrounded by a marker to the same color as the marker, black, white, and chromatic colors are Color coat "ll",
"00" and "IO" are required.

■ R9G of the CCD sensor that constitutes the image reading section,
Due to pixel shift between 8 and lens aberration, for example, the transition from white to black is caused by R, G, B as shown in Figure 12.
Each level varies and becomes a chromatic color.

In other words, unless such a chromatic color is determined to be a color ghost based on the arrangement of the coats and changed to an achromatic color, in marker mode, the black characters outside the marker area will be erroneously converted due to the false chromatic coats at both ends. There is a risk of

As mentioned above, it is possible to widen the achromatic color area in order to reduce the error of becoming a chromatic color at the transition from white to black, but if the achromatic color area is made too wide, the color that can be used as a marker becomes less.

■ When a certain marker starts, it will eventually settle into a chromatic color, but as mentioned above, the R, G,
Due to pixel shift between 8 and lens aberration, there is a possibility that the color becomes 4 (achromatic) in the process of change. If left as is, the marker color conversion will create a black border on the outside of the marker and a marker color border on the inside. It is necessary to determine such black as a black ghost from the arrangement of codes and correct it to an achromatic color.

As mentioned above, in order to reduce the error of black in the process of change, it is possible to narrow the achromatic color area, but if the achromatic color area is narrowed too much, black characters with even a little saturation It becomes a chromatic color.

Conventionally, the color coat generation unit has one type of fixed area color code "00" for white, neutral color, chromatic color, and black;
"Ol", "lO" and "11" are output, and it is proposed to use these in common in full color mode and marker mode [Problem to be solved by the invention] In this way, in full color mode and marker mode, 1
When using different color codes, the chromatic area in full color mode and the chromatic area in marker mode are completely equal.

However, the chromatic color area in the full color mode is an area other than the intermediate color area that is reconverted into an achromatic color and a chromatic color by post-processing. On the other hand, the chromatic color area in the marker mode is an area other than the achromatic color area (black area and white area) in consideration of the above-mentioned color ghost and black ghost.

In other words, the chromatic color areas in the full color mode and the marker mode naturally exist, and if they are forced to match, the following problems will occur.

(a) When determining the chromatic color area in marker mode, R,
G, Create a cylinder from black to white in the B color system,
The outside is set to a chromatic color area.

Therefore, the intermediate color areas in full color mode, which are determined as areas other than this chromatic color area, are L, a*,
In the B-Kyo color system, due to the influence of scanner characteristics, the 8-wheel plane does not form an even circle, but instead becomes a constricted circle. Therefore, in full color mode, a clearly chromatic color (for example, green) is judged to be an intermediate color, and in a mode that corrects areas with a large density gradient to an achromatic color, a green esso with a large density gradient is reproduced as black. Put it away.

(b) When determining the chromatic color area in full color mode, in order to make the tilted castle that is chromatic-converted into chromatic and achromatic colors by post-processing into an intermediate color area, there are 8 L cars, 8 quintillion-b* b car surface color system.
A uniform circle is created on a plane, and the outside of the circle is set as a chromatic area. Therefore, the white or black achromatic color area in the marker mode determined as an area other than this area is R
, G, B The color system does not form a perfect cylinder from black to white, but becomes thinner or thicker in parts. Therefore, ghost correction cannot be performed stably.

Therefore, in the present invention, it is possible to use a color code formed to match the mode.

[Means for Solving the Problems] The present invention is a color image processing device that forms a color coat from a color read signal and performs image processing in accordance with this color code, and has a plurality of operation modes, The apparatus is provided with a color code generation means for outputting a color code adapted to each of the plurality of operation modes.

[Function] In the above configuration, the color coat generation means outputs a color code suitable for each operation mode, and this color coat is used to perform image processing, so that the best image processing can be performed in each operation mode. It becomes possible to do so.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG.

In the same figure, the red R9 from the image reading unit (not shown)
8-bit digital data for each of green G and blue B is supplied to the density conversion section 2 from input terminals IR, IG, and IB. In this density conversion section 2, R, G.

The 8-bit data of B is converted to 6-bit data in accordance with human visual characteristics.

The R, G, and H data from the density conversion section 2 are supplied to the color reproduction section 3. In this color reproduction section 3, R9G, B
From the data, yellow a-Y, magenta M, cyan C9 black data for chromatic image processing are generated. Y and M output from this color reproduction section 3.

C and K data are supplied to the selector 4.

Further, the G data from the density conversion section 2 is transferred to the monochromatic color reproduction section 5.
is supplied to The monochromatic color reproduction section 5 generates black data ' for blind color image processing from the G data. In addition,
The black data ' may be generated from R or B data, or roughly from two colors of R and B or from all colors. The data output from the monochromatic color reproduction section 5 is supplied to the selector 4.

Further, the R, G, and B data from the density conversion section 2 are supplied to the color code generation section 6, and the color coat generation section 6 is also supplied with a mote switching signal indicating whether the mode is full color mode or marker mode. SM is supplied.

In the full color mode, this color code generation section 6 performs color classification into intermediate colors and chromatic colors according to the data levels (densities) of R, G, and H. and,
The color code generation unit 6 outputs a color code indicating whether the color belongs to an intermediate color or a chromatic color.

Here, the setting of the intermediate color area and the chromatic color area is performed as shown below.

That is, as shown in Figure 2A, create a cylinder with radius r using the L-tree and B* color system (the L-wheel force direction is not shown in the figure), and set the inside of it as an intermediate color area. At the same time, the outside thereof is set as a chromatic color area. In this case, the inside of the cylinder is set to be an area that can be either achromatic or chromatic depending on the image information, for example, ``=15''.

The mapping of the cylinder of radius r to the R, G, B color system is
When the R, G, and H data are close, it becomes an achromatic color, so it changes from white [(R, G, B) = (0, O, O)] to black [(R, G, B) = (63, 63 , 63)]. FIG. 3 shows an example of this distribution. The figure is an RG plane cut at B=32, and it can be seen that it has a slightly twisted cylindrical shape. this is,
This is because it is affected by scanner characteristics.

In addition, from L*, a book, b car color system, X, Y, Z
Conversion to a color system is easily performed using a formula.

Furthermore, the relationship between the X, Y, Z color system and the R, G, B color system is determined by a determinant as the eigenvalue of each scanner characteristic. Therefore, mapping from the L-kyo, a-tree, and b-kyo color systems to the R, G, and B color systems can be easily performed.

After all, in the full color mode, the color code generation unit 6 determines the color coordinate position based on R, G, and H data as follows.
It is determined whether the object is inside or outside the mapped area. Then, when it is inside the area, a color code indicating that it belongs to an intermediate color, for example "01", is output,
When it is outside of that range, a color code indicating that it belongs to a chromatic color, for example "10", is output.

In addition, in the color code generating section 6, in the marker mode, colors are divided into chromatic colors and chromatic colors according to the data level (density) of R, G, and B, and achromatic colors are further divided into black and white.

The color code generation unit 6 outputs a color code indicating whether the object belongs to black, white, or a chromatic color.

The marker color conversion section, which will be described later, converts using a chromatic color code, but unless the ghost correction is completely performed before marker color conversion, problems will occur as explained using Figures 12 and 13. . Therefore, the color coat is determined in consideration of stably performing ghost correction.

Here, the setting of the achromatic color area and the chromatic color area is performed as shown below.

In other words, as shown in Figure 4, a cylinder from white (0, 0, 0) to black (63, 63, 63) is created in the R, G, B color system, and the inside of the cylinder is set as an achromatic area. At the same time, the outside is set as a chromatic color area.

In this case, the distance Q of the color coordinate position based on arbitrary R, G, and B data from the straight line connecting the coordinates (0, 0, 0) and (63, 63° 63) is as shown in the following formula. This is determined by this parameter Q. W is (R+G+B
)/3.

・ ・ ・ (1) The radius QO of the cylinder created as shown in Figure 4 is, for example, R
, G, 8 pixel deviation is 0. When there are two pixels, the number is 5 to 6. Therefore, when Q≦QOO, the area is determined to be an achromatic color area, and when Q>Qo, it is determined to be a chromatic color area.

The cylinder created in this R, G, B color system is Lkya*
, b* color system, it becomes as shown in FIG. 5, for example. The figure shows an a-tree-wheel plane cut with QO=5 and L lengths=50, which is not uniform but distorted. This is because it is affected by scanner characteristics and the like.

Further, the setting of the white area and black area of the achromatic color area is performed as shown below.

In other words, when the color coordinate position based on R, G, and B data satisfies L ky ≦ LO (for example, 82) in the L '', a ′ * b ′ color system, it is determined to be a black area, and L ky > Lo. Sometimes it is determined to be a white area.

In the end, in the marker mode, the color coat generation unit 6
Therefore, when Q>Qo is satisfied, it is determined that it is a chromatic color area, and a color coat indicating that it belongs to a chromatic color, for example, ``
When Q≦QOb) and L books≦Lo are satisfied, it is determined that it is a black area, and a color code such as “11” indicating that it belongs to black is output, and Q5Qo and L
When Car>Lo is satisfied, it is determined that the region is white, and a color code indicating white, for example "00", is output.

As shown in FIG. 6, the color code generation section 6 is configured with a table 61 made of, for example, a ROM. In this case, in addition to R, G, and B data, a mode switching signal SM is supplied as an address signal, and a color coat as described above is output in each mode.

Returning to FIG. 1, the color coat output from the color code generation section 6 is supplied to the color code correction section 7.

Further, the G data supplied to the input terminal IG is supplied to the image discrimination section 8. The image discrimination section 8 discriminates from the density gradient of G whether it is a black character or a color gradation surface. In this case, discrimination may be made using all the data of R9G and B, but the cost will be high. Therefore,
In this example, only the G data that best matches the visibility is used for discrimination.

FIG. 7 shows pixels used for image discrimination. In the figure, X is the pixel of interest for which image discrimination is to be performed, V is the pixel 1 line before, W is the pixel 1 pixel before, and Y is 1 pixel.
Painting after painting, Z is the pixel after l line. here,
The density gradient is determined using the density data (8 bits) of each pixel. That is, the density gradient S of the pixel of interest X is determined by the following equation.

S:21V-Xl+IW-Yl ---■ In this way, the S parameter of the density gradient is determined from the surrounding pixels.

In addition to this S parameter, S': 1V-XI+IW-Xl ---■S"=IV
-Zl+IW-Yl . . . Parameters such as ■ can also be considered. However, since S' uses only two peripheral pixels, it does not have sufficient discrimination ability, and S'' requires three pixels in the sub-scanning direction, resulting in a large memory capacity.

Therefore, in this example, the S-parameter of equation 0 is used, which requires a small memory capacity and has a high discrimination ability.

FIG. 8 is a diagram showing a specific configuration of the image discriminating section 8. As shown in FIG.

In the figure, 21 is a register that holds data of pixel Y, 22 is a register that holds data of i1 pixel X, and 23 is a register that holds data of pixel Y.
24 is a subtraction absolute value circuit that performs subtraction between W and Y and generates an absolute value IW-Yl. Yl is supplied to adder 28.

In addition, 25 is a line memory I, 26 is a register that holds the data of pixel V, and 27 is a subtraction absolute value circuit that performs subtraction between V and X to generate absolute 111V-XI. Absolute [IV-Xl from circuit 27 is amplified @29T! After being amplified twice, it is supplied to the adder@28.

Addition 1!28m' is absolute [IW-YI and 21V-Xl are added, and the sum signal IW-YI+21 V-
Xl is supplied to comparison W30 as an S parameter.

Further, this comparison 1130 is supplied with a density gradient threshold WiT from the darkness value generator 31.

In comparison W30, the S parameter is compared with the threshold T, and S
>T, a signal of high level "l" indicating a black character stroke is output, and when S≦T, a signal of low level "0" indicating a negative color gradation is output.
signal is output.

Returning to FIG. 1, the image discrimination signal output from the image discrimination section 8 is supplied to the color code correction section 7. The color code correction unit 7 selects, among the color codes F supplied from the color code generation unit 6, a color code “10” indicating that it belongs to a chromatic color, a color code “11” indicating that it belongs to a black color, and a color code “11” indicating that it belongs to a white color. Color code to indicate
OO'' is output as is, and only the color code ``01'' indicating that it belongs to an intermediate color is corrected by the image discrimination signal and output.

In other words, when the image discrimination signal is a high level "l" signal indicating a black character image, the color code "Ol" indicating an intermediate color is modified to a color code indicating belonging to an achromatic color, for example "11". be done. At this time, the area setting is equivalently expressed as shown in FIG. 2B.

On the other hand, when the image discrimination signal is a low level "0" signal indicating that the color gradation is -, the color code roIJ indicating an intermediate color is corrected to the color code rlOJ indicating belonging to a chromatic color.

At this time, the setting of the electric range is equivalently expressed as shown in FIG. 2C.

The color code output from the color code correction section 7 is supplied to the selector 4. This selector 4 contains a scan code (a code indicating the color being recorded by the printer)
is supplied. The selector 4 selects and outputs color data corresponding to the color being recorded by the printer based on the scan code.

In this case, in the pixel portion whose color code is "10", the Y, M, C, and K data output from the color reproduction section 3 is output as yellow black data.

On the other hand, in the pixel portion whose color code is "00" or "11", zero is output as yellow Lucian data, and data '' is output as black data from the monochromatic color reproduction section 5. Ru.

The color data output from the selector 4 is supplied to a color ghost correction section 9. The color ghost correction section 9 is supplied with the mode switching signal SM and also the color coat from the color coat correction section 7. and,
In the marker mode, color ghost correction is performed based on the color coat.

For example, in the case of an arrangement of color coats as shown in FIG. 12, correction is made to remove chromatic color codes. For example, when the color codes are arranged as shown in FIG. 13, correction is made to remove the black color code.

Further, the color data supplied via the color ghost correction section 9 is supplied to the marker color conversion section 10. The marker color conversion section 10 is supplied with the mode switching signal SM and also supplied with the color coat corrected by the color ghost correction section 9. In marker mode, color data is adjusted to perform color conversion based on the color coat. For example, the color data is changed so that the black area within the area surrounded by the marker has the same color as the marker.

The color data output from the marker color conversion section 10 is supplied to a printer unit 13 via a filter processing section 11 that performs various filter processing and a gradation correction section 12, and an image is formed on recording paper.

In this way, in this example, the color coat output from the color code generation unit 6 in the full color mode and the marker mote is individually formed in consideration of the image processing in each mote, and the color coat is The image processing used, ie, switching between chromatic/achromatic image processing in full color mode, ghost correction processing, color conversion processing, etc. in marker mode, can be performed satisfactorily.

Note that the color code generation section 6 can also be configured as shown in FIG. 9, apart from the example shown in FIG. 6 mentioned above.

In the figure, R, G, and B data are supplied to a table 62 composed of ROM. This table 62 stores data ia indicating whether the coordinate position of each data of R, G, and B is in the intermediate color area or the chromatic color area in full color mode, and also stores the data ia indicating whether the coordinate position of each data of R, G, and B is in the intermediate color area or in the chromatic color area in the marker mode. Data ib indicating whether the image is in the chromatic color area is stored.

In this case, the data ja is, for example, set to a low level "0" to indicate that the object is in the intermediate color region, and set to a high level "1" to indicate that the object is in the chromatic color region. Further, the data ib is set to a low level "0" when indicating that the area is in the achromatic color area, and set to a high level "1" when indicating that the area is in the chromatic color area, for example. Furthermore, these data ia
, ib are formed by setting areas for each mode as described above.

When R, G, and B data are supplied to this table 62 as address signals, data 1a is output to the output terminal 62f, and data 1 is output to the output terminal 62m.
b are output and supplied to the encoder 63, respectively.

Further, the G data is supplied to a comparator 64.

In this comparison @64, the level of the G data is taken as the brightness level and compared with the reference value Er, and the data 1c indicates whether it is in the black area or the white area of the achromatic color area in the marker mode.
is output. Even when dividing into black areas and white areas based on G data, L*, a',
It is possible to obtain almost the same result as dividing by the size of L* in the b car color system.

In this case, the data 1c is, for example, set to a high level "1" when indicating that the area is in a black area, and set to a low level "0" when indicating that the area is located in a white area.

The data IC output from the comparator 64 in this manner is supplied to the encoder 63.

Further, the mode switching signal SMC is supplied to the encoder 63 as data 1d. Although not mentioned above, the mode switching signal S
For example, M is a low level when indicating full color mode.
0, and high level “1” when indicating marker mode.
”.

FIG. 10 shows the human power data [ia
, ib, ic, idl and output data [oa
,.

b]. In other words, in full color mode, when the coordinate positions of R, G, and B data are in the intermediate color area, human data [la, ib
, ic, idl are [0, X, X, O]
Therefore, the output data [oa, obl are [0, 1
1, which becomes a color code indicating that it belongs to an intermediate color. "X" indicates that it may be a high level "1" or a low level "0", and the same applies hereafter. Also,
In full color mode, R, G.

When the coordinate position of data B is in the chromatic color area in full color mode, input data [+a+ib,
Since ic and idl are [1, Also, in the marker mode, when the coordinate positions of R, G, and B data are in the chromatic color area in the marker mode, the manual data [ta, +b, IC+i
d] is [X, 1. X, 11, so the output data [oa, obl becomes [1, 0], which is a color code indicating that it belongs to a chromatic color. Also, in the marker mode, when the coordinate positions of R, G, and B data are in the black area, the input data [ia].

ib, ic, idl are [X, 0. 1.
1], so the output data [oa, obl are [1
, 1] -) T This is a color code indicating that it belongs to black. Furthermore, in the marker mote, R, G,
When the coordinate position of the data of H is in the white area, the human data [ia, ib, ic, idl are [X,
O, 0, 1], so the output data [oa,
obl is [0,0], which is a color code indicating that it belongs to white.

In this way, the color code generation section 6 shown in FIG. 9 can also output a color code suitable for each mode, similarly to the color code generation section 6 shown in FIG. 6.

According to the configuration as shown in the example in FIG. 6, the table 61
The address signals supplied to the table 62 are R, G, and B data and the mode switching signal SM, whereas according to the configuration shown in the example of FIG. ,G.

This is only the data of B. In other words, the address pit for table 62 is one bit less than the address bit for table 61, and the capacity of table 62 is half that of table 61. Therefore, by configuring as shown in the example of FIG. 9, the ROM capacity can be significantly saved.

Next, the configuration and operation of each part of a color copying machine to which the color image processing apparatus of the present invention is applied will be explained with reference to FIG. Note that a color dry development method is used for development in this color copying machine.

In this example, two-component non-contact development and reversal development are employed. That is, the transfer drum used in conventional color image formation is not used, and the images are superimposed on the electrophotographic photosensitive drum that forms the image. In addition, in the following example, in order to downsize the device, four-color images of yellow, magenta, cyan, and black are developed on the image-forming OPCG light body (drum) in four rotations of the drum, and then transferred after development. Do it once,
The image is transferred onto recording paper such as plain paper.

By turning on the copy button of the color copying machine, the document reading section A is driven. The original 101 on the original platen 128 is optically scanned by an optical system.
134.

The carriage 132 and the movable mirror unit 134 are caused to travel on a slide rail 136 at predetermined speeds and directions, respectively, by a stepping motor (not shown).

Optical information (image information) obtained by irradiating the original 101 with the light source 129 is transmitted to the reflecting mirror 131. V mirror 133.
133', it is led to an optical information conversion unit 137.

A standard white plate 138 is provided on the back side of the left end of the document table 12B. This is because the image signal is normalized to a white signal by optically scanning the standard white plate 138.

The optical information conversion unit 137 includes a lens 139, a prism 140, two dichroic mirrors 102 and 103, and an R-CCD 104 on which a red color separation image is captured.
It is composed of a G-CCD 105 that captures a green color-separated image, and a B-CCD 106 that captures a blue color-separated image.

The optical signal obtained by the optical system is focused by a lens 139, and separated into blue optical information and yellow optical information by the dichroic mirror 102 provided in the prism 140 described above. Roughly speaking, the dichroic mirror 103 color-separates the yellow optical information into red optical information and green optical information. In this way, the color optical image is decomposed by the prism 140 into three-color optical information of red, R, green, and blue.

Each color separated image is formed on the light receiving surface of each CCD 104 to 106 to obtain an image signal converted into an electrical signal. The recording image signal is output to the writing section B.

The signal processing system includes various signal processing circuits from the density converter 2 to the gradation corrector 12 shown in FIG. 1, as well as an A/D converter and the like.

The writing section B has a deflector 141. This deflection W
As 141, in addition to a galvanometer mirror or a rotating polygon mirror, a deflector made of an optical deflector using crystal or the like may be used. The laser beam modulated by the color signal is deflected and scanned by this deflector 141.

When the deflection scan is started, the beam scan is detected by a laser beam index sensor (not shown) and the first
Beam modulation using a color signal (for example, a yellow signal) is started. The modulated beam is applied to an image forming member (photoreceptor drum) 14 which is charged in a negative manner by a charger 154.
2 is scanned.

Here, the main scanning by the laser beam and the image forming body 14 are performed.
As a result of the sub-scanning by the second rotation, an electrostatic latent image corresponding to the first color signal is formed on the image forming body 142.

This electrostatic latent image is transferred to a developing device 14 containing yellow toner.
3 to form a yellow toner image.

Note that a predetermined developing bias voltage from a high voltage power supply is applied to this developing device 143.

Toner is supplied to the developing device 143 when necessary by controlling a toner replenishing means (not shown) based on a command signal from a system control CPU (not shown). .

The yellow toner image mentioned above is removed by the cleaning blade 147.
A is rotated with the crimping bond released, and a second color signal (for example, a magenta signal) is generated in the same manner as the first color signal.
An electrostatic latent image is formed based on this. Then, by using a developing device 144 containing magenta toner, this is developed to form a magenta toner pocket.

Needless to say, a predetermined developing bias voltage is applied to the developing image 11144 from the high voltage power supply.

Similarly, an electrostatic latent image is formed based on the third color signal (cyan signal), and a developing image W145 containing cyan toner is formed.
A cyan toner image is formed. Further, an electrostatic latent image is formed based on the fourth color signal (black signal), and a black toner image is formed by the developer v1 146 containing black toner.

Therefore, multicolor toner images are formed on the image forming body 142 in an overlapping manner.

Note that although the formation of a four-color multicolor toner image has been described here, it goes without saying that a two-color or single-color toner image can be formed.

As described above, the development process involves applying AC and DC bias voltages from a high-voltage power supply.
An example of so-called non-contact two-component jumping development is shown in which each toner is caused to fly toward the image forming body 142 for development.

Further, toner replenishment to the developing devices 144, 145, and 146 is performed based on a command signal from the CPU, similar to the developer@143, with a predetermined amount of toner.

On the other hand, the recording paper P fed from the paper feeding device 148 via the feed roll 149 and the timing roll 150 is conveyed onto the surface of the image forming body 142 in a state synchronized with the rotation of the image forming body 142. be done. and,
A multicolor toner image is transferred onto the recording paper P by the transfer pole 151 to which a high voltage is applied from the high voltage power supply, and the separation pole 1
52.

The separated recording paper P is conveyed to the fixing device 153, where it undergoes a fixing process and a color image is obtained.

The image forming body 142 after the transfer is cleaned 1iii.
It is cleaned at t147 and prepared for the next image forming body process.

In the cleaning device 147, a predetermined DC voltage is applied to the metal roll 147b in order to facilitate recovery of the toner cleaned by the cleaning blade 147&. This metal roll 147b is placed on the surface of the image forming body 142 in a non-contact state. cleaning blade 1
47a is released from the pressure bonding after cleaning is completed, and in order to remove unnecessary toner that is left behind after the release, an auxiliary roller 147c is further provided, and this auxiliary roller 147c
ti: By rotating and pressing in the opposite direction to the image forming body 142, unnecessary toner is sufficiently cleaned and removed.

In the above-mentioned embodiment, the color code generation unit 6 outputs color codes that are compatible with two modes, the full color mode and the marker mode, but the present invention has three or more types of modes. The same can be applied to things.

Further, in the above embodiment, an example in which the color image processing apparatus of the present invention is applied to a color copying machine has been described, but it goes without saying that the present invention can be used in various other types of equipment.

[Effects of the Invention] As explained above, according to the present invention, the color code generation means outputs a color code suitable for each operation mode, and this color code is used to perform image processing. The best image processing can be performed in the operating mode.

It also has a marker mode that requires white, black, and chromatic color codes, and a full color mode that requires intermediate and chromatic color codes, and a table for outputting the color code to the color code generation means. is provided, the address to the table can be set by outputting achromatic and chromatic color codes from the table in marker mode, and then dividing the achromatic color into black and white and generating black and white codes. The number of bits can be reduced, and the amount of ROM 5 can be saved significantly.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 and FIG. 31! I is a diagram for explaining area setting in full color mode, FIGS. 4 and 6 are diagrams for explaining area setting in marker mode, and FIGS. 6 and 9 are examples of the configuration of the color code generation section. 7 is a diagram showing pixels used for image discrimination, FIG. 8 is a diagram showing a configuration example of the image discrimination section, FIG. 10 is a diagram showing input and output of the encoder of the color code generation section, and FIG. FIG. 11 is a configuration diagram showing the overall configuration of a color copying machine, and FIGS. 12 and 113 are diagrams for explaining color ghosts and black ghosts. IR, IC, IB ・ ・ 2nd number 3 ◆ 1 5 Kushikai 1 1 1 9・φ 10・φ 11 conflict・ 12・φ 31 61.62-- 63 Kensan 41 ・Input terminal・Concentration change part・Color reproduction section, selector, monochromatic color reproduction section, color code generation section, color code correction section, image discrimination section, color ghost correction section, marker color conversion section, filter processing section, gradation correction section, printer unit ◆Table encoder・Comparator Fig. 2 11110 R RGB color system L* a'J' b* Color system Fig. 5 (R, G, B) = J (63, 63, 63) Area setting Figure 4 I i: Block diagram of color code generation section Encoder input/output color ghost Figure 3

Claims (2)

[Claims] (1) A color image processing device that forms a color code from a color read signal and performs image processing according to this color code has multiple operation modes and outputs a color code that is compatible with each of the multiple operation modes. 1. A color image processing device comprising a color code generation means. (2) It has a marker mode that requires white, black, and chromatic color codes, and a full color mode that requires intermediate color and chromatic color codes, and the color code generation means outputs the color code. The table outputs the achromatic and chromatic color codes in the marker mode and the intermediate and chromatic color codes in the full color mode, and the achromatic color code in the marker mode is 2. The color image processing apparatus according to claim 1, wherein the color code is changed to white or black depending on the brightness level of the color read signal.