JPS63241659A - Film original plate preparing method for plain mesh - Google Patents

Abstract

PURPOSE:To improve a quality by reading a linear image with a scanner, etc., executing the coloring processing with a computer, preparing directly the film original plate of respective colors, preparing directly the line plate from the negative or positive of a block copy original concerning a ruled line part, synthesizing it and preparing a thick plate. CONSTITUTION:Image data are read and a line drawing is displayed at an image display part 60 on a display 6. Next, it is judged whether or not a boundary line is made. When a coloring area is determined, it not necessary to make a boundary and the color is destinated. The coloring area corresponding to the designated color is destinated. The coloring data are registered. The coloring data are read, and the boundary of a color and a color is doubled by a doubling processing. Next, by changing a resolution, the roughness of an outline is removed. By the data conversion, the data are converted to mesh % data, outputted to a film original plate on a scanner and comes to be a mesh original plate. By synthesizing a mesh original plate and a line plate, the film original plate for a plain mesh is made.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention is directed to areas of constant color and density in printed matter;
The present invention relates to a device for creating a film original plate having a so-called plain screen portion.

(Prior Art) There are many plain mesh portions in a color printed matter, and the plate-making process for these plain mesh portions is carried out in a special process different from the plate-making process for general color portions, so-called tone products.

The conventional process will be explained below based on the drawings.

FIG. 9 shows an example of a printed matter made up of plain mesh portions. In the figure, the printed matter 250 is composed of human hands 25, marks 252, 252, and character parts 253, and includes areas A1, A2, areas B1 to B6, area C1, and areas D1 to D1.
D3, regions E1 and C2, the outline S and the character W each have a constant color and density. Printed material like this 2
The plate making of 50 is performed as follows.

First, a draft manuscript 260 as shown in FIG. 10 is created. This is a drawing of only the outline appearing in the printed matter 250 shown in FIG. 14. Based on this draft manuscript 260, a color instruction sheet 265 as shown in FIG. 11 is created. In this color instruction sheet 265, a rough outline corresponding to the outline drawn on the draft manuscript 260 is drawn, and color instructions as shown in the figure are given to the areas A to E surrounded by this rough outline. There is. Here, YIO1M50, C20 in area A means that the halftone dot area ratio (hereinafter referred to as "halftone %") of the yellow plate when creating the separated plate is 10%, and the halftone dot area ratio of the magenta plate is 50%.
, the halftone percentage of the cyan plate is 20%, and the halftone percentage of the blank plate is 0%.

Next, the original image 260 shown in FIG. 10 is photographed with a camera, and a positive 271 and a negative 272 as shown in FIGS. It is used to create a mask corresponding to areas A-E.The mask is made by laminating a colorless and transparent base film and a light-shielding film, and the light-shielding film can be easily peeled off from the base film. Therefore, a desired mask can be created by stacking the positive 271 and the mask, cutting the light-shielding film along the outline of the positive 271, and peeling it off.

FIG. 13 (al, (bl,
1 to 285 correspond to the areas A to E, respectively. That is, the mask 281 hides areas other than areas AI and A2 of the printed matter 250 shown in FIG.
The mask 283 hides areas other than area C1 of the printed material 250, the mask 284 hides areas other than areas D1 to D3 of the printed material 250, and the mask 285 hides areas other than areas E1 and C2 of the printed material 250. It's hidden.

Next, a transparent film in which halftone dots are uniformly provided at a predetermined halftone percentage (hereinafter referred to as "flat dot") and the mask 281
A film original plate for each color is created using 285 to 285, and this is done by overlapping a mask and a plain screen and printing them on the film original plate to form halftone dots only in the desired portions of the film original plate.

FIG. 14 shows an outline of the process from the draft manuscript 260 to the creation of the printed matter 250.
2.293.294.295.296 is a flat mesh, and its mesh percentages are 100%, 20%, 10%, 50%, and 30, respectively.
%, 8%. Note that these various types of flat nets are prepared in advance. As shown in the figure, from the draft manuscript 260, positive 2
71 and the negative 272 are created, and the masks 281 to 285 are created from the positive 271 as described above.

Here, the method for creating the yellow plate 241 will be explained.
4 and flat screen 291.292.293 are used. first,
The mask 281 and the flat screen 291 are overlapped and printed on a film original plate to form a 10% halftone dot in area A. Next, the mask 282 and the flat screen 292 are overlapped and baked, and then the mask 283 and the flat screen 292 are overlapped and baked, and finally the mask 2
The yellow plate 241 is created by overlapping and printing 84 and the flat screen 291 to form halftone dots of 20%, 20%, and 100% in areas B, C, and D of the same film original plate, respectively. Similarly, masks 281, 282, 283 and flat nets 294, 29
5.293, the magenta version 242 is created from the mask 281.
2B2.283.285 and flat mesh 292.293.296
A cyan version 243 is created from this.

In addition, the blank version 244 is the original version 26 shown in FIG.
Since it consists only of outlines drawn on 0, that is, ruled lines, no mask is used and the negative 27 shown in Figure 12 (bl) is used.
2 and flat! Created from A291. That is, negative 27
2 and the flat screen 291 are overlapped and printed on a film original plate, 100% halftone dots are formed in the above contour line part,
A black version 244 is created.

Printing plates are created from the yellow version 241, magenta version 242, cyan version 243, and black version 244 created in this way, and overprinting is performed using ink and paper to create the printed matter 50.

As mentioned above, the conventional plate-making process for plain screen areas is a complicated process that uses various masks and flat screens, and is all done by hand, so it takes a long time to create the final film master plate for each color. In addition, errors in pattern position are likely to occur during mask creation and overprinting operations, resulting in the problem that desired printed matter is difficult to obtain. This problem became more pronounced as the pattern became more complex. A patent application was filed in 1986-213 for a device that used a computer to perform the entire plate-making process for the blank screen portion, which was done by hand.
This invention was proposed by the applicant as No. 259, and is intended to improve the efficiency of the plate-making process.

Here, in the above-mentioned apparatus that uses the computer to perform the plate-making process for the plain screen portion, when the line image of the draft manuscript is read by the scanner, it is read at a fairly coarse resolution;
After coloring processing is performed by a computer, interpolation processing is performed to increase the resolution of the image data read by the scanner to the resolution for creating film master plates, and smoothing processing is performed to remove roughness in the ruled line areas caused by this interpolation processing. ing.

(Problems with the prior art) However, the smoothing process described above not only takes a long time, but also cannot completely remove roughness from the ruled line area, making it unsuitable for printed matter that requires high quality. was occurring.

(Object of the Invention) The present invention has been made in view of the above-mentioned problems, and involves reading a line image drawn on a draft manuscript using a scanner or the like, and using a computer based on the read image data. A device that performs coloring processing and directly creates film masters for each color creates halftone masters for the areas excluding the ruled lines, and for the ruled lines, cotton clothing is created directly from the negative or positive of the original. The object of the present invention is to provide a method for creating a plain mesh film original by combining originals.

(Summary of the Invention) To achieve this object, the present invention provides an image reading means for reading a line image drawn on a document, an image data storage means for storing an image read by the image reading means,
an image display means for reading data stored in the image data storage means and displaying the line image; a color specifying means for specifying a color to be colored; and an area to be colored in the image displayed on the image display means. a coloring area specifying means for specifying an arbitrary point within the area, a coloring means for coloring the area specified by the coloring area specifying means with a color specified by the color specifying means, and colored image data obtained by the coloring means. colored image data registration means for registering only the colored image data in the image data storage means; resolution changing means for changing the colored image data stored in the image data storage means to an output resolution;
a colored image data converting means for converting the colored data changed by the resolution changing means into dot % data of yellow, magenta, cyan, and black; and outputting the wire % data converted by the colored image data converting means on the film. A halftone original excluding the ruled line area obtained from a plain mesh film original production device comprising an original output means for creating an original, and a ruled line area obtained directly from the negative or positive of the line image drawn on the original. Provided is a method for producing a film original plate for plain mesh, in which an original plate is created by combining a line plate forming a line plate.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing an example of the method of the present invention. In the figure, reference numeral 1 denotes an input scanner serving as an image reading means of the present invention, which can read a line image drawn on a draft original 260 by scanning with a scanning head.

The reading line density of this input scanner 1 is 18 fi/
It is desirable that it be at least the size of a tree. 2 is an ink face that transfers image data read from an input scanner via a data bus 3 to a magnetic disk device 4 serving as an image data storage means of the present invention.

Reference numeral 5 denotes a host computer, which includes a pixel scanning means 5a, a pixel color replacing means 5b, a colored image data registration means 5C1 and a colored image data converting means 5, which constitute the coloring means of the present invention.
d, resolution changing means 5e, etc., and controls each part in a comprehensive manner.

6 is a display serving as an image display means of the present invention;
The image data stored in the magnetic disk device 4 can be read out to display the line image of the draft manuscript 260. 7
1 is a coloring instruction section serving as a color specifying means and a coloring area indicating means of the present invention, and includes a tablet 7a and a stylus pen 7b.
have. Reference numeral 8 denotes a color memory, in which a plurality of colors to be colored are stored in advance. The stored colors are displayed on the display 6 as a color scale, from which the color to be colored is specified using the tablet 7a and the stylus pen 7b. Then, based on the designation from the coloring instruction section 7, the pixel scanning means 5a and the pixel color replacing means 5b create colored image data for the outline displayed on the display 6, that is, the ruled line part of the draft original, and the created color image data is The colored image data is registered in the magnetic disk device 4 by the colored image data registration means 5c, and then changed to the output resolution by the resolution changing means 5e, and then converted into yellow, magenta, cyan, and blank by the colored image data converting means 5d. Converted to dot % data.

Reference numeral 10 denotes an output scanner serving as an original output means of the present invention, to which yellow, magenta, cyan, and blank halftone percentage data converted by the colored image data converting means 5d is given via the data bus 3 and the interface 11. and,
Based on these data, halftone plates 12 (Y', M', C', K') of each color other than the ruled line area are created.

13 are line plates (Y', M#, C", K
'), and is directly created by overlaying the negative or positive of the draft manuscript 260, these masks, and a predetermined flat screen and printing them onto a film master. Reference numeral 14 denotes a final plain screen film original plate (Y, M, C, K) obtained by combining the screen plate 12 and the line plate 13 for each color with a printer. In the figure, the line plates 13 for the ruled line portion are created for all four colors, but it goes without saying that the line plate I3 for the ruled line portion is created only for the necessary colors.

Reference numeral 20 denotes an auxiliary original, which is drawn on a transparent film as auxiliary lines that are not drawn on the draft original 260 but are necessary for creating the colored image data. This auxiliary original 20 is used as needed, and when used, a color scanner or the like that can distinguish and read the line image on the original 260 from the auxiliary lines on the auxiliary original 20 is used. used as input scanner 1,
The display 6 used is one that can distinguish and display this line image and the auxiliary lines.

FIG. 2 shows the auxiliary original 20 shown in FIG. As shown in the figure (the auxiliary original 20 has auxiliary lines 22, 23, and 24 drawn on the transparent film 21 in a color different from that of the original 260, such as red). The auxiliary line 24 is used to connect the broken parts of the line drawings 261 and 262 drawn on the screen 260, and although the auxiliary line 24 is not drawn on the draft manuscript 260, it is represented as a color border line 266 on the color instruction sheet 260. The auxiliary manuscript 20 is mainly a draft manuscript 260.
This is used when there are many broken parts in the line image above, and it is not necessary to use it.

Note that the line images and auxiliary line images read by the scanner 1 are not limited to those drawn on the master manuscript 260 and the auxiliary manuscript 20 as described above, and are not limited to those drawn on the master manuscript 260 and the auxiliary manuscript 20, but may be printed on a copy of the master manuscript in a color different from that of the copied image. You may also use auxiliary lines drawn directly with .

Next, the operation of the plain mesh film master production apparatus shown in FIG. 1 will be described in the case where the auxiliary original 20 is used.

First, the auxiliary original 20 is stacked on top of the original 260 and set in a predetermined position on the scanner 1, and the scanning head of the scanner 1 is scanned to create the original 260 and the auxiliary original 20.
The line images drawn on the ink face 2 are read separately, and the read image data is sent to the data bus 3 via the ink face 2. The pixel density of the image data taken in by the scanner 1 is approximately 18 lines per line, which is considerably lower than the pixel density of the original film, but this is to reduce the amount of image data. The image data sent to the data bus 3 is temporarily stored in a memory (not shown) of the host computer 5, and after being appropriately processed, is sent to the data bus 3 again and stored on the magnetic disk 4.

FIG. 3 is a flowchart showing the processing of image data captured by the scanner 1.

First, the keyboard 9 connected to the host computer 5
When a start signal is given by operating the scanner etc., image data is input to the scanner (Sl), the captured image data is binarized (S2), and stored in the memory of the host computer 5. . Note that the binarization process may be performed after the image data captured by the scanner is stored in the memory of the host computer 5. The stored image data is read out several lines at a time, and subjected to dust removal processing and notch removal processing (S3). The dust removal process is a process in which pixels smaller than a few pixels are regarded as dust and are automatically removed, and the notch removal process is a process in which unevenness in the contour line is removed. Next, the image data is compressed (S4), and this data compression is a process of replacing one line of the binarized image data with address data of points that change from white to black or from black to white. This is done by creating so-called run length data. The image data compressed in this way is sent to the data bus 3 by the host computer 5 and sent to the magnetic disk device 4.
(S5).

Next, we will explain the process of performing coloring processing on the image data stored in the magnetic disk device 4 to create colored image data, and creating a halftone plate excluding ruled lines based on this colored image data. do.

FIG. 4 is a flowchart for explaining the coloring process control operation by the host computer 5, and FIGS. 5 and 6 are explanatory diagrams showing the state of the image displayed on the display 6.

First, a start signal is given by operating the keyboard 9, and image data stored in the magnetic disk device 4 is read out (S11) and displayed on the display 6 (512). On the display 6, as shown in FIG. 5, a line image is displayed in an image display area 60, and a menu area 61 displays a color scale 61a, a border line creation menu 61b, and a coloring menu 61c. The line image displayed in the image display area 60 consists of a line image of the draft original 260 indicated by a solid line and an auxiliary line image of the auxiliary original 20 indicated by a broken line, and these line images and auxiliary line images are displayed in different colors, etc. are displayed separately. The color scale 61a is a display of color data stored in the color memory 8, and this color data is selected from among the colors that can be displayed on the display 6.
A color close to the color specified in the color instruction sheet 265 shown in FIG. 11 is selected. Note that the color data stored in the color memory 8 and the colors specified in the color instruction sheet 265 are associated with each other by a color table (described later).

Next, it is determined whether to create a border (513).
). In this case, using the above line image and auxiliary line image,
Area a1 of the image displayed on the display 6 to be colored
, a2, bl, b2, b3, b4, b5, b6, C1,
Since boundaries have been created for all of dl, d2, d3, d4, d5, el, and C2, the next boundary line creation process (514) is not performed, and the process advances to step S15 and waits for color designation. do. Then, when a color is specified, the process waits for a coloring area to be specified (516), and when a coloring area is specified, the next coloring process is performed (517).
). Here, the color designation in step S16 is performed by operating the tablet throat 7a and the stylus pen 7b to select the color to be colored from the color scale 61a, and the designation of the coloring area in step S16 is performed by operating the tablet throat 7a and the stylus pen 7b.
and stylus pen 7b to display the display 6.
Each area a1, C2, bl to be colored in the image displayed on
, b2, b3, b4, b5, b6, C1, dl, C2,
This is done by specifying any point within C3, C4, C5, el, and C2. In addition, in the coloring process in step S17, the pixel scanning means 5a sequentially scans surrounding pixels starting from the pixel at the point in the area designated in step S16, and , the pixel color replacement means 5b replaces only the pixels of the same color as the pixel at the point designated in step S16 with the color selected from the color scale 61a in step S15.

Next, it is determined whether the coloring process is completed (518).
), if the process has not been completed, the process returns to step S13 and processes from step 313 onwards are performed for the next area.

In this way, each area a1, C2, bl, b2, b3,
b4, b5, b6, cl, dl, C2, C3, C4, C
5, el, and C2 are colored with the specified color, and when this coloring process is completed, the colored image data registration means 5c registers the colored image data on the colored display 6 in the magnetic disk device 4 (519). In this case, since the line image portion, that is, the ruled line portion, of the draft manuscript 260 shown by the solid line has not been colored, the colored data registered in the magnetic disk device 4 is data for the area excluding the ruled line portion.

Further, the auxiliary line image of the auxiliary original 20, that is, the portion indicated by the broken line, may be colored with a desired color by the line image portion coloring process described later, if necessary, and only when it is colored, the colored image data registration means 5c, coloring data is registered in the magnetic disk device 4.

Note that if the auxiliary manuscript 20 shown in FIG. 1 is not used,
If YES is selected in step S13, border lines of colors corresponding to various auxiliary lines on the auxiliary document 20 are created (514)
.

FIG. 6 is a schematic diagram for explaining the process of creating color boundary lines and performing coloring processing.

Now, the image data of the draft manuscript stored in the magnetic disk device 4 is only a circular outline as shown by the solid line in FIG.
When coloring with multiple colors as shown in the figure, do as follows.

First, the image data stored in the magnetic disk device 4 is read out in the same manner as described above (Sll), and the display 6
(512). In this case, on the display 6, only the outline 60 indicated by a solid line in the image display area 60 is displayed, as shown in FIG.
The color to be colored is read out from the color memory 8 and displayed in a.

In the determination of whether or not to create a boundary line in step S13, YES is selected, and the next boundary line is created (5
14). In creating this boundary line, tablet 7a
Then, by operating the stylus pen 7b, the user selects the border line creation menu 61b, selects the color of the border line from the color scale 61a, and then creates a border line shown by the broken line 60L in FIG. As shown in the figure, by creating this boundary line, the inside of the contour line 60 is 60A to 60A.
It is divided into H areas.

Next, color designation and coloring region designation are performed for each region 60A to 60H in the same manner as described above, and coloring processing is performed. At this time, in the coloring process of step S17, the pixel scanning means 5a sequentially scans the surrounding pixels starting from the pixel at the point in the area specified in step 316, and , the pixel color replacement means 5b replaces only the pixels of the same color as the pixel at the point specified in step S16 with the color scale 61 in step S315.
In order to replace with the color selected from a, the area 30A is already
The coloring process has been completed up to 30D, and even if coloring is performed on the area 30E, the color and area to be colored are simply changed without performing protection processing on the general border color. Just by giving an instruction, the coloring process of the area 30E is immediately performed. Note that the coloring process in this case is not limited to the above embodiment, and may be performed in combination with a protect process in which the specified color is not colored.

In this way, each region 60A to 60E of the image displayed on the display 6 in step 312 is
It will be colored with the specified color as shown in . Then, when this coloring process is completed, the colored image data registration means 5C registers the colored image data on the display 6 that has been colored on the outline 60, that is, excluding the ruled line portion, in the magnetic disk device 4 (519). .

FIG. 7 is a flowchart for explaining the control operation for creating film masters of each color based on the colored image data registered in the magnetic disk device 4, and FIG. This is an explanatory diagram of a color table used in the following, and the operation of creating a film master plate for each color will be explained below based on the diagram.

First, a start signal is given by operating the keyboard 9, and the colored image data stored in the magnetic disk device 4 is read out (531), and a duplication process is performed (S32). Double processing is a process that overlaps the boundaries between colors.
In the case of the printed matter 250 shown in the figure, the areas a1, a2,
bl, b2, b3, b4, b5, b6, dl, d2, d
3, d4, d5, el, and e2 may be slightly increased so that they overlap with the contour line.

Next, the resolution of the colored data is changed by the resolution changing means 5e (533). This change in resolution involves changing the image to the output resolution by interpolating the colored image data or the like. Here, since the colored image data does not include a ruled line portion, smoothing processing for removing roughness of the outline is not performed on the image whose resolution has been changed.

=24- After this, data conversion processing is performed (534).

The data conversion process includes each area a1, a2, bl, b2, b3, b4,
b5, b6, cl, dl, d2, d3, d4, d5, e
Using the color table shown in FIG.
This is to convert into magenta, cyan, and black dot percentage data. This color table is for each yellow (Y), magenta (M), cyan (C), and blank (K) as shown in the figure.
) with color numbers attached to the combinations of rope percentages,
The color table 28 in FIG. 8(a) shows the color table for the image shown in FIG. 5, and the color table 29 in the same figure (bl) shows the color table for the image shown in FIG. , the color number is associated with the color data stored in the color memory 8, and the host computer 5
is registered in. Therefore, the colored image data colored with the colors of the color scale 61a shown in FIGS. % data, that is, color separation data.

Next, the color separation data created by the data conversion in step S34 is sent to the data bus 3 shown in FIG. Halftone plates 12 (Y', M', C', K') of each color are created (S3
5).

In addition, line plate 13 (Y', M", C", K") of the ruled line part
is directly created by overlaying the negative or positive of the draft manuscript 260, these masks, and a predetermined flat mesh and printing them onto a film master. In this embodiment, since the ruled line portion shown in FIG. 10 is black-colored, the line plate 13 is
Figure (negative 272 shown in bl and flat mesh 291 shown in Fig. 14)
It is created only for the black version by overlapping and printing on the film original plate.

Thereafter, by combining the screen printing plate 12 and the line printing plate 13 for each color using a printer and printing them onto a single film plate, the final plain screen film plate 14 (Y, M) is produced.
, , C, K) are created.

(Effects of the Invention) As described above, in the present invention, a line image drawn on a draft manuscript is read by a scanner or the like, and a computer is used to perform coloring processing based on the read image data. , a device that changes the resolution of the image and directly creates a film original for each color creates a halftone version for the area excluding the ruled line area, and a halftone original for the ruled line area is created directly from the negative or positive of the original. In order to create a plain mesh film original plate by combining these two types of halftone plates, in a device that directly creates the original plate for each color using a computer, the ruled line part that occurs due to the change in the resolution of the image data after coloring is used. There is no need to perform a smoothing process to remove roughness, and a screen printing plate that removes ruled lines can be created in an extremely short time, and the device itself can be manufactured at a relatively low cost, resulting in high quality plain screen printing. This has the effect that a film master plate can be produced efficiently and at low cost.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the method of the present invention, FIG. 2 is an explanatory diagram of the auxiliary document 20 shown in FIG. 1, and FIG. 3 is a diagram showing the processing of image data captured by the scanner 1. Flowchart, FIG. 4 is a flowchart for explaining the coloring process control operation by the host computer 5, FIGS. 5 and 6 are explanatory diagrams showing the state of the image displayed on the display 6, and FIG. A flowchart for explaining the control operation for creating film originals of each color based on the colored image data registered in the device 4, FIG. 9 is an explanatory diagram showing an example of a plain screen portion of a printed matter, and FIG. 10 is an explanatory diagram of a color table used in the plate-making process of the printed matter 250 shown in FIG. 9. 11 is an explanatory diagram showing an example of a color instruction sheet used in the plate-making process of the printed matter 250 shown in FIG. 9, and FIG. Explanatory diagrams of positive and negative images taken with a camera, Figure 13 fal, (b), fc), (dl
, (el is an explanatory diagram showing an example of a mask used when the printed matter 250 shown in FIG. 9 is created in a conventional plate-making process, and FIG. 14 is an explanatory diagram showing an example of a mask used when the printed matter 250 shown in FIG. It is an explanatory diagram of the process in the case of creation. 1------One-person scanner 2------Interface 3-1---Data bus 4---Magnetic disk device 5, -- --Host computer 5a---Pixel scanning means 5b--One pixel color replacement means 5cm---One colored image data registration means 5d-
- Colored image data conversion means 5e - - Enlarged image creation means 6 - Display 7 - - Colored fingering section 7
a-----1 tablet 7b---------Stylus pen 8-1----Color memory 9----
--- Keyboard 10 --- Output scanner 11
-------Interface 12--m=---Mesh plate other than the ruled line part 13---Line plate 14 for one ruled line part----1 Plain mesh film original plate 40--- −
---Auxiliary manuscript 260-1111...Printed manuscript Patent applicant Dai Nippon Printing Co., Ltd. Agent Patent attorney Atsushi Konishi Figure 2 Figure 3 Figure 5 Figure 6 (a) Figure 6 (b) Figure 7 Figure 6 (a) (b) Figure 9 Figure 10 Figure 1; Figure 1 Figure 12 Figure 13 (b) Figure 13 Figure 18

Claims (1)

[Claims] An image reading means for reading a line image drawn on a document, an image data storage means for storing the image read by the image reading means, and reading data stored in the image data storage means to display the line image. a color specifying means for specifying a color to be colored; a coloring area specifying means for specifying an arbitrary point within an area to be colored of the image displayed on the image display means; coloring means for coloring the area designated by the color specifying means with a color specified by the color specifying means; colored image data registration means for registering only the colored image data obtained by the coloring means in the image data storage means; resolution changing means for changing the colored image data stored in the image data storage means to an output resolution; and a colored image for converting the colored data created by the resolution changing means into halftone percentage data of yellow, magenta, cyan, and black. Excluding the ruled line portion obtained from a plain mesh film original plate production device comprising a data conversion means and an original output means for outputting the halftone percentage data converted by the colored image data conversion means onto a film to create an original plate. A method for producing a film original plate for plain mesh, characterized in that an original plate is created by combining a screen original plate and a line plate forming a ruled line portion directly obtained from a negative or positive of a line image drawn on the original.