JPH06139033A - Color page description language processor - Google Patents

Abstract

PURPOSE:To easily monochrome convert a page description language program including a color description, to attain a color output by monochrome-processing the converted page description language program of the monochromatic description, and to attain a color correction at a high speed. CONSTITUTION:In a definition adding part 2, a monochromatic conversion definition adding part 2-1 adds a definition for converting the color description into the monochromatic description having only monochromatic values of respective primary colors, or a color correction definition adding part 2-2 further adds a definition related with a color correction to the definition for the monochromatic conversion to a page description language program 1 including the color description in a prescribed color destination system using prescribed plural primary colors. Then, a monochromatic interpreter 3 interprets the page description language program to which those difinitions are added, and develops it into monochromatic image data. Then, the signal image data are synthesized, and outputted as color output data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing document data expressed in a page description language such as Postscript or Interpress, that is, a page description language program, and particularly a page description capable of processing only a limited number of colors. The present invention relates to a color page description language processing device that interprets a page description language program including color description using a language interpreter and performs expansion processing to image data.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a high-quality print output of a high-performance printing device such as a laser printer from the output of the result of data processing by a data processing device, image formation is performed by executing a page description language program.

Here, the page description language includes characters, photographs,
It is a common interface language with an output device that can handle data in which graphics and the like are mixed, that is, document data in a unified manner. Therefore, a printer capable of interpreting and processing the page description language will always output normally if the data is written in the page description language, even if the data is created by a data processing device of a different model. can do.

The page description language interpreter for interpreting and executing the page description language is for developing image data and outputting it to a printer or the like.

A printer having a page description language processing device (hereinafter referred to as page description language printer) is
A high-performance microcomputer and a large-capacity memory are required to realize high-performance such as high resolution and high-speed processing. This makes page description language printers very expensive.

In recent years, among page description language printers, printers capable of color output have appeared.

However, the printer controller mounted on a page description language printer capable of color output requires a high-speed microcomputer and a large-capacity memory because the number of colors increases as compared with a monochrome printer controller. The description language interpreter must also support color. Therefore, there is a problem that the page description language printer capable of color output becomes expensive.

To solve this problem, for example, in Japanese Patent Laid-Open No. 11422/1993, a page description language program including a color description is divided for each color,
Simple color PDL that avoids the use of expensive color printer controllers and uses inexpensive monochromatic controllers
A printer device is described.

However, the above publication does not describe a means for realizing how to divide a page description language program including a color description.

When a single color controller is used,
There is a problem that color correction of color output becomes difficult.

[0011]

As described above, the page description language printer capable of color output has conventionally required a high-performance printer controller, and thus has a problem of high price, which is a problem. To solve the problem, separate page description language programs for each color,
It was considered to use a monochrome controller. However, due to the nature of the page description language, a new means for interpreting and separating the page description language is required, and how to separate the page description language program for each color has been a problem. Further, since a single-color controller is used, it is difficult to perform color correction, which is essential for color output. Therefore, it is conceivable to perform color correction on the data expanded into image data by the page description language interpreter, but this requires calculation for the entire image data, which requires a long processing time for color correction. There was a point.

In view of the above, the present invention eliminates such problems, allows a page description language program including a color description to be easily converted into a single color, and performs color output by the single color processing of the converted page description language program with a single color description. It is also an object of the present invention to provide a color page description language processing device capable of performing color correction at high speed.

[0013]

According to the present invention, a plurality of color descriptions are added to input document data expressed in a page description language including a color description according to a predetermined color designation method using a plurality of predetermined color elements. Addition means for adding a definition for converting into a single element description having only one color element value among color elements, and image of a predetermined single element by interpreting document data to which the definition by the addition means is added The image forming apparatus further comprises: a developing unit for developing the data, and a synthesizing unit for synthesizing image data of a predetermined single element for each of the plurality of color elements developed by the developing unit to create color image data. To do.

In addition, in the input document data expressed in a page description language including a color description by a predetermined color designating method using a plurality of predetermined color elements, the color description is added to one of the plurality of color elements. Adding means for adding a definition for converting into a single element description having only element values, and expanding means for interpreting the document data to which the definition by the adding means is added and expanding it into image data of a predetermined single element, Storage means for storing image data of a predetermined single element for each of the plurality of color elements developed by the developing means, and image of a predetermined single element for each of the plurality of color elements stored in the storage means An output control means for sequentially reading data and controlling output of image data of a predetermined single element corresponding to the plurality of color elements is provided.

Further, the input document data is provided with a second adding means for adding a definition for correcting the element values of the plurality of color elements in accordance with the conversion of the predetermined single element description, and the expansion is performed. Means, based on the second addition means,
The element values of the plurality of color elements are corrected.

[0016]

According to the present invention, the adding means adds the plurality of color elements to the input document data expressed in a page description language including a color description by a predetermined color designation method using a plurality of predetermined color elements. A definition for converting to a single element description having only one color element value, and the expansion means interprets the document data to which the definition by the addition means is added to obtain image data of a predetermined single element. And the synthesizing means synthesizes the image data of the predetermined single element for each of the plurality of color elements developed by the developing means to create color image data.

Further, the adding means adds the color description among the plurality of color elements to the input document data expressed in a page description language including a color description by a predetermined color designation method using a plurality of predetermined color elements. Definition is added to convert it into a single element description having only one color element value, and the expanding means interprets the document data to which the definition by the adding means is added and expands it into image data of a predetermined single element. Then, the storage means stores the image data of a predetermined single element for each of the plurality of color elements expanded by the expanding means, and the output control means,
Image data of a predetermined single element for each of the plurality of color elements stored in the storage unit is sequentially read, and output control of image data of a predetermined single element corresponding to the plurality of color elements is performed.

Further, the input document data is provided with a second addition means for adding a definition for correcting the element values of the plurality of color elements in accordance with the conversion of the predetermined single element description, and the expansion is performed. Means, based on the second addition means,
The element values of the plurality of color elements are corrected.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the arrangement of a color page description language processing apparatus according to the first embodiment of the present invention. In FIG. 1, the color page description language processing device is
A monochromatic conversion definition adding unit that reads a page description language program 1 including a color description from a storage unit such as a buffer (not shown) and adds a definition for monochromatic conversion of a monochromatic value of each primary color of the color description of the page description language program 1 2-1 and a page description language program including a color description by the color correction conversion definition adding unit 2-2 that performs color conversion of the monochromatic value of each primary color of the color description in accordance with the monochromatic conversion. A definition adding unit 2 that performs monochromatic conversion by adding monochromatic conversions to monochromatic values, a monochromatic interpreter 3 that interprets the monochromatic converted page description language program, and develops it into image data, and a monochromatic interpreter 3 develop it. The image synthesizing unit 4 synthesizes image data and outputs it as color output data.

Here, each primary color of the color description is, for example, RG.
In the case of the color designation method by B, R (red),
It means G (green) and B (blue), and in the case of the color designation method by CMYK, it means C (cyan), M (magenta), Y (yellow), and K (black).
It means an element represented by various color designation methods.

Next, the operation of the color page description language processing apparatus of FIG. 1 will be described with reference to the flowchart.

FIG. 2 is an operation flowchart of the color page description language processing device of FIG. In FIG. 2, first, the definition adding unit 2 reads the page description language program stored in the storage means in the printer control device from the host computer directly or via the network, and the page for each monochromatic value of each primary color of the color description is read. When a definition of the description language is added and further color correction is performed, a definition for changing the monochromatic value of each primary color of the color description is also added (step 101). Further, the monochrome interpreter 3 interprets the page description language program to which these definitions are added and develops it into monochrome image data (step 10).
2). Then, it is determined whether or not the processing for all the primary color values of the color description has been completed (step 103). If not, the process proceeds to step 101,
Performs processing for the monochromatic values of other primary colors that have not been processed.

On the other hand, when the processing for all the primary color monochromatic values of the color description is completed, the image compositing unit 4 composites monochromatic image data of each primary color (step 10).
4) Output to the printer (step 105). Then, in the document data (input page description language program), it is determined whether there is a page that has not been processed (step 106). If there is a page that has not been processed, the process proceeds to step 101. The above process is repeated for the unprocessed pages. On the other hand, when the processing of all pages is completed, this processing is completed.

Next, conversion of a single color description by adding a definition will be described by taking a page description language program including a concrete color description as an example.

FIG. 3 is a diagram showing a specific example of the definition of monochromatic conversion.

FIG. 3A shows a page description language program including a color description of CMYK color designation system by PostScript which is one of page description languages. First, a page description language program including this color description will be described.

"100 100 moveto" means to move the pen to coordinates (100, 100).

"Times-Roman findfo
nt 12 scalefont setfont ”
It means setting the font of Roman typeface and setting the size of 12 points.

"0.5 0.2 1 0.5 setc
"mykcolor" is an operator "setcm" that changes the current color for the color designation method by CMYK.
CMYK is changed to a combination of C (cyan) = 0.5, M (magenta) = 0.2, Y (yellow) = 1, and K (black) = 0.5 by "ykcolor". means.

"(Color) show" is a character string '
Means to order to write color '.

"200 200 moveto" means to move the pen to the coordinates (200, 200).

"0.1 0.6 0.2 1 setc
"mykcolor" is an operator "setcm" that changes the current color for the color designation method by CMYK.
CMYK = 0.1, M (magenta) = 0.6, Y (yellow) = 0.2, K (black) = 1 by CMYK by ykcolor. means.

"300 200 lineto" means to draw a straight line up to coordinates (300, 200). Therefore, the straight line is drawn from the coordinates (200, 200) to the coordinates (300, 200).

As a result, the CMYK values are 0.
The character string'color 'of the color having 5, 0.2, 1, 0.5 is written, and the values of CMYK are 0.1,
A straight line with a color of 0.6, 0.2, 1 has coordinates (200,
From 200) to coordinates (300,200) will be drawn.

Definitions of monochromatic conversion in which the definition adding unit 2 adds a definition to a Postscript program including such a color description are shown in FIGS. 3B to 3E.

3 (b) to 3 (e) are the definitions possessed by the monochromatic conversion definition adding section 2-1. That is, FIG.
3B is a definition of a monochrome conversion for cyan (C), FIG. 3C is a definition of a monochrome conversion for magenta (M), and FIG. 3D is a definition of a monochrome conversion for yellow (Y). 3 (e) shows the definition of monochromatic conversion for black (B).

For example, the definition of the monochrome conversion for cyan in FIG. 3B is as follows: / setcmykcolor {pop pop pop
setgray} def, and the operands of the operator "setcmmykcolor" are arranged in the order of cyan, magenta, yellow, and black.
op "to remove, operator" setgray "
Sets the remaining cyan value as a gray value. For example, the color description in FIG. 3A, 0.5 0.2 1 0.5 setcmykcol
r means that cyan has a value of "0.5", magenta has a value of "0.2", yellow has a value of "1", and black has a value of "0.5". Here, since the operator "pop" acts on the order from black to cyan, cyan "0.
Only values of "5" are subject to conversion to gray values. Therefore, by adding this definition, the operator "se
The cyan value in the color description by "tcmykcolor" is changed to the gray value. In this case, values other than cyan are
Does not participate in changes to gray values.

Further, in FIG. 3C, similarly, values other than magenta are removed by the operator "pop", and values only magenta are changed to gray values by the operator "setgray". In this case, “4 1 ro in FIG.
"ll" means to rotate once in the direction of C ← M ← Y ← K. As a result, the order of the four primary colors becomes the order of MYKC, and YKC is removed by the "pop" operator. , Magenta value “0.2” is the only target for conversion to gray value.

Further, in FIG. 3D, the values other than yellow are removed by the operator "pop", and the values of only yellow are changed to gray values by the operator "setgray". In this case, “4 2 roll” in FIG.
“L” means to rotate twice in the direction of C ← M ← Y ← K, and as a result, the order is YKMC, and KMC is “p”.
The "op" operator removes Y, that is, only the yellow value "1" is subject to conversion to gray values.

Further, also in FIG. 3E, the values other than black are removed by the operator "pop", and the values of only black are changed to gray values by the operator "setgray". In this case, “4-1 roll” in FIG.
“L” means to rotate once in the direction of C → M → Y → K. As a result, the order of KCMY becomes, and CMY becomes “po.
Removed by the "p" operator, K, ie the black value "0.5", is subject to conversion to gray values.

The definitions of the four monochromatic changes in FIGS. 3B to 3E are set as one set, and the addition of the one set results in the CMYK color designation method description being monochromatic converted. .

In the program example of FIG. 3 (a), the definition of only the operator "setcmykcolor" has been described, but similarly, the color description operator "setrgbcol" in the case of the color designation method by RGB.
r ”, a color description operator“ seths ”according to the HSB method
bcolor ”or operator“ colorim ”
The definition for the operator regarding all color descriptions such as “age” is performed. Here, H of the HSB method is a hue (hu
e) and S are saturations, and B is brightness.

Further, in the above description, the definition for developing the CMYK primary colors into the gray scale is shown as an example. However, from the color designation system by CMYK, RGB, HS
It is also possible to perform conversion between various color designation methods by adding a conversion definition between various color designation methods such as conversion to a color designation method such as B.

For example, from the CMYK color designation system,
The following three expressions for converting to the RGB color specification method may be defined in the page description language.

R = 1- (C + K) G = 1- (M + K) B = 1- (Y + K) Next, color correction will be described.

FIG. 4 is a diagram showing the definition of the color correction of the color description of the color designation method by RGB. In FIG.
FIGS. 4A to 4C show definitions of red (R), green (G), and blue (B) color corrections in a page description language program, respectively.

The color correction at this time realizes the color correction by the following primary conversion formula. That is, R = m11R '+ m12G' + m13B '+ d1 G = m21R' + m22G '+ m23B' + d2 B = m31R '+ m32G' + m33B '+ d3 where R', G ', and B'are signals to be calculated, mi
j (i = 1,2,3, j = 1,2,3) is a correction coefficient of the signal to be operated, and d1 to d3 are offset correction terms. As a result, the color description by (R, G, B) becomes (R ',
G ', B') are corrected to the color description, and are further converted into gray values by the operator "setgray". The definition of the conversion to the gray value including the color correction from R to R ′ at this time is shown in FIG. 4A, and the definition of the conversion to the gray value including the color correction from G to G ′ is shown in FIG. b),
The definition of the conversion to the gray value including the color correction from B to B ′ is shown in FIG.

Here, the meaning of the definition of conversion into gray values including the color correction will be described. For example, in FIG.
The definition of the conversion of red into gray values will be explained. The value of R (red) is corrected by changing the color correction as in {} for the color change operator "setorgbcolor" by the RGB color specification method. To be done.

That is, first, the values of R → G → B are already stacked, while "m13 mul"
When “exch” is performed, a correction coefficient m13 is newly provided, and the stacking is performed in the order of m13 → R → G → B. Then, “m13 × R” is executed by the multiplication operator “mul”, and they are stacked in the order of (m13 × R) → G → B. Furthermore, the mutual replacement operator "e
xch ”performs mutual replacement of (m13 × R) and G, and stacks in the order of G → (m13 × R) → B.

Next, "m12 mul add exc
h ”. That is, a new correction coefficient m12 is given, and the stack is performed in the order of m12 → G → (m13 × R) → B. Then, by the multiplication operator "mul", m1
The multiplication of 2 and G is performed, and (m12 × G) → (m13 ×
R) → B are stacked in this order. Furthermore, by the addition operator “add”, (m12 × G) and (m13 × R)
Is added, and the stack is made in the order of (m12 × G + m13 × R) → B. Finally, the mutual replacement operator "ex
ch ”to perform mutual replacement, and B → (m12 × G + m
13 × R) are stacked in this order.

Further, "m11 mul add" is performed. That is, a new correction coefficient m11 is given and m1
1 → B → (m12 × G + m13 × R) stacked,
The multiplication operator “mul” multiplies m11 and B, and (m11 × B) → (m12 × G + m13 × R)
Is stacked like. Then, the addition operator "a
dd ”, (m11 × B) and (m12 × G + m13
× R) is added and (m11 × B + m12 × G + m1)
3 × R) is created, and the offset correction term d1 is given by performing “d1 add” to obtain d1
→ (m11 × G + m12 × G + m13 × R) is stacked, and finally by the addition operator “add”,
“D1 + m11 × G + m12 × G + m13 × R” is created.

As a result, color correction for R (red), that is, conversion of R = m11R '+ m12G' + m13B '+ d1 is performed.

Then, it is converted into a gray value by the operator "setgray" for changing into a gray value.

The G (green) color correction of FIG. 4B or the B (blue) color correction of FIG. 4C is performed in the same manner as the color correction of FIG. 4A. A correction conversion is performed.

In this way, by including the definition of color correction in the single color conversion, the number of calculations determined by the number of operators can be greatly omitted, and high speed color correction processing can be performed.

Next, the second embodiment will be described.

FIG. 5 is a block diagram showing the arrangement of a color page description language processing apparatus according to the second embodiment of the present invention. In FIG. 5, the color page description language processing device is
A monochromatic conversion definition adding unit for reading a page description language program 11 including a color description from a storage means such as a buffer (not shown) and adding a definition for monochromatic conversion of monochromatic values of each primary color of the color description of the page description language program 11 12-
1 and the page description language program including the color description by the color correction conversion definition adding unit 12-2 that performs the color conversion of the color correction of the single color value of each primary color of the color description by the color correction conversion definition adding unit 12-2. Definition adding unit 2 for performing monochrome conversion by adding a definition for converting each color, a monochrome interpreter 3 that interprets the monochrome converted page description language program, and develops the image data into image data, and image data developed by the monochrome interpreter 3. A storage unit 14 for storing
The storage unit 14 is composed of an output control unit 15 which sequentially reads monochromatic image data corresponding to the output of an output device (not shown) and outputs monochromatic color data 16 to the output device.

Next, the operation of the color page description language processing apparatus of FIG. 5 will be described with reference to the flowchart.

FIG. 6 is an operation flowchart of the color page description language processing device of FIG. In FIG. 6, first, the definition adding unit 12 reads the page description language program stored in the storage means in the printer control device from the host computer directly or via the network, and the page for each monochromatic value of each primary color of the color description is read. When a definition of the description language is added and further color correction is performed, a definition for changing the monochromatic value of each primary color of the color description is also added (step 201). Further, the monochrome interpreter 13 interprets the page description language program to which these definitions are added and develops it into monochrome image data (step 20).
2). Then, the monochromatic image data that has been expanded and stored in the storage unit 14 is read, and the monochromatic color data is output to the printer under the control of the output control unit 15 (step 203). Then, it is determined whether or not the processing for all the primary color values of the color description is completed (step 20).
4) If it has not been completed, further step 201
Then, the processing is performed on the monochromatic values of the other primary colors that have not been processed.

On the other hand, when the processing for all the monochromatic values of the primary colors of the color description is completed, it is determined whether or not there is an unprocessed page in the document data (input page description language program) (step 205), if there is a page that has not been processed yet, the process proceeds to step 201 and the above-described processing is repeated for the page that has not been processed. On the other hand, when the processing of all pages is completed, this processing is completed.

Next, the conversion of a single color description by adding a definition will be described by taking a page description language program including a concrete color description as an example.

FIG. 7 is a diagram showing a specific example of the definition of monochromatic conversion. FIG. 7A shows a page description language program including a color description of a CMYK color specification method by PostScript which is one of page description languages. The page description language program including this color description is the same program as in FIG. 3 and has the same meaning as the program.

The operator "setc" for changing the current color for the color designation method by CMYK, which is the color description in the PostScript program in FIG. 7A.
7B to 7E show the definition of the monochrome conversion in which the definition adding unit 12 adds the definition to "mykcolor". Further, FIGS. 7B to 7E are definitions included in the monochromatic conversion definition adding unit 12-1. That is, FIG.
7B is a definition of monochromatic conversion for cyan (C), FIG. 7C is a definition of monochromatic conversion for magenta (M), and FIG. 7D is a definition of monochromatic conversion for yellow (Y). 7 (e) shows the definition of monochromatic conversion for black (B).

For example, the definition of the monochrome conversion for cyan in FIG. 3B is as follows: / setcmykcolor {pop pop pop
setgray} def, and the operands of the operator "setcmmykcolor" are arranged in the order of cyan, magenta, yellow, and black.
op "to remove, operator" setgray "
Sets the remaining cyan value as a gray value. Therefore, by adding this definition, the cyan value in the color description by the operator "setcmykcolor" is changed to the gray value. Note that values other than cyan do not contribute to the change to gray values.

In FIG. 7C, similarly, the values other than magenta are removed by the operator "pop", and the values only magenta are changed to gray values by the operator "setgray". Further, in FIG. 7D, the values other than yellow are removed by the operator “pop”, and the values of only yellow are changed to gray values by the operator “setgray”. Further, also in FIG. 7E, the values other than black are removed by the operator “pop”, and the values of only black are changed to gray values by the operator “setgray”.

Image data of a single color is created based on the page description language program changed by the definition of the single color change of FIGS. 7B to 7E, and for each image data of the single color. Will be output. Then, four single-color image data of single-color changed page units are sequentially output, and color output of one page is performed.

In the program example shown in FIG. 7A, the definition of only the operator "setcmykcolor" has been described. Similarly, the color description operator "setrgbcol" in the case of the color designation method by RGB.
r ”, a color description operator“ seths ”according to the HSB method
bcolor ”or operator“ colorim ”
The definition for the operator regarding all color descriptions such as “age” is performed.

Further, in the above description, the definition for developing the CMYK primary colors into the gray scale is shown as an example. However, from the color designating method by CMYK, RGB, HS
It is also possible to perform conversion between various color designation methods by adding a conversion definition between various color designation methods such as conversion to a color designation method such as B.

Next, color correction will be described.

FIG. 8 is a diagram showing the definition of the color correction of the color description of the color designation method by RGB. In FIG.
FIGS. 8A to 8C show definitions of color corrections of red (R), green (G), and blue (B) in a page description language program, respectively.

The color correction at this time realizes the color correction by the following primary conversion formula. That is, R = m11R '+ m12G' + m13B '+ d1 G = m21R' + m22G '+ m23B' + d2 B = m31R '+ m32G' + m33B '+ d3 where R', G ', and B'are signals to be calculated, mi
j (i = 1,2,3, j = 1,2,3) is a correction coefficient of the signal to be operated, and d1 to d3 are offset correction terms. As a result, the color description by (R, G, B) becomes (R ',
G ', B') are corrected to the color description, and are further converted into gray values by the operator "setgray". The definition of the conversion to the gray value including the color correction from R to R ′ at this time is shown in FIG. 8A, and the definition of the conversion to the gray value including the color correction from G to G ′ is shown in FIG. b),
The definition of the conversion to the gray value including the color correction from B to B ′ is shown in FIG. Note that the definition of conversion to gray values including this color correction is the same as in FIGS. 4A to 4C,
The meaning is the same.

In this way, by including the definition of color correction in the single color conversion, the number of calculations determined by the number of operators can be greatly omitted, and high speed color correction processing can be performed.

As described above, in the present embodiment, by adding the definition of the monochromatic conversion to the color description, the color description can be converted into the monochromatic description for each monochromatic value as a result. it can. In addition, the color correction calculation can be performed at high speed by adding the color correction at the time of conversion into the monochrome description.

[0075]

As described above, according to the present invention, the above-mentioned color description is added to the input document data expressed in the page description language including the color description by the predetermined color designation method using the predetermined plural primary colors. It has additional means for adding a definition to convert it into a single-color description having only single-color values of one primary color, interprets the document data with this definition added, develops it into single-color image data, and develops the plurality of primary colors. The single color image data for each is combined to create color image data and output. When the output device outputs for each primary color like a "1-pass 1-color" printer, single-color image data that has been developed once for each page is stored, and each primary color is sequentially output for each page. Color correction is performed in accordance with the definition of the output means.

Therefore, the page description language program including the color description can be separated only by adding the definition without separating the color description for each primary color, and the processing can be performed by using the controller of a single color. It has an advantage that processing can be performed at high speed.

Further, when the output device is a "1-pass 1-color" printer, the output is output to the printer each time the development of each primary color of the color description is completed, so only a memory for storing image data of a single color is used. Since color output can be performed, there is an advantage that a large amount of memory can be saved.

Further, in the case of performing color correction, since color correction is performed in addition to the definition of monochromatic conversion, there is an advantage that the calculation processing time of color correction can be shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a color page description language processing device according to a first embodiment of the present invention.

FIG. 2 is an operation flowchart of the color page description language processing device of FIG.

FIG. 3 is a diagram showing a specific example of a definition of monochrome conversion.

FIG. 4 is a diagram showing a definition of color correction of a color description of a color designation method by RGB.

FIG. 5 is a block diagram showing a configuration of a color page description language processing device according to a second embodiment of the present invention.

6 is an operation flowchart of the color page description language processing device of FIG.

FIG. 7 is a diagram showing a specific example of a definition of monochromatic conversion.

FIG. 8 is a diagram showing a definition of color correction of a color description of a color designation method by RGB.

[Explanation of symbols]

1 page description language program 2 definition addition section 2-1 monochromatic conversion definition addition section 2-2 color correction definition addition section 3 monochromatic interpreter 4 image synthesis section 5 color output data

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location B41J 29/38 Z 9113-2C G06F 9/45 15/40 530 L 7218-5L

Claims (3)

[Claims] 1. The input document data expressed in a page description language including a color description according to a predetermined color designation method using a plurality of predetermined color elements, the color description being one of the plurality of color elements.
Adding means for adding a definition for converting into a single element description having only one color element value, and expanding means for interpreting the document data to which the definition by the adding means is added and developing the image data of a predetermined single element And a synthesizing means for synthesizing image data of a predetermined single element for each of the plurality of color elements expanded by the expanding means to create color image data. apparatus. 2. The input document data expressed in a page description language including a color description according to a predetermined color designation method using a plurality of predetermined color elements, the color description being one of the plurality of color elements.
Adding means for adding a definition for converting into a single element description having only one color element value, and expanding means for interpreting the document data to which the definition by the adding means is added and developing the image data of a predetermined single element A storage unit for storing image data of a predetermined single element for each of the plurality of color elements developed by the developing unit; and a predetermined single element for each of the plurality of color elements stored in the storage unit. And an output control means for controlling the output of image data of a predetermined single element corresponding to the plurality of color elements. 3. A second adding means for adding a definition for correcting the element values of the plurality of color elements to the input document data in accordance with the conversion of the predetermined single element description, The color page description language processing device according to claim 1 or 2, wherein the expansion means corrects the element values of the plurality of color elements based on the second addition means.