JPH06100815B2 - Film original plate making device for plain net - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an area in a printed matter where color and density are constant,
The present invention relates to an apparatus for producing a so-called solid mesh portion film original plate.

(Prior Art) A large number of plain net parts are present in a color printed matter, but the plate making process of this plain net part is carried out in a special process different from the general color part, so-called tone making plate making process.
The conventional process will be described below with reference to the drawings.

FIG. 14 shows an example of a printed matter composed of a plain mesh portion. In the figure, printed matter 250 is person 251, mark 25
2, 252 and a character portion 253, the areas A1, A2, the areas B1 to B6, the area C1, the areas D1 to D3, the areas E1 and E2, and the contour line S and the character W have a constant color and density, respectively. ing. The plate making of such a printed matter 250 is performed as follows.

First, a block copy document 260 as shown in FIG. 15 is created. This is a drawing in which only the contour lines appearing in the printed matter 250 shown in FIG. 14 are drawn. A color instruction sheet 265 as shown in FIG. 17 is created based on the block copy document 260. This color instructions 2
A contour line corresponding to the contour line drawn on the block copy manuscript 260 is roughly drawn on the area 65, and an area A to be surrounded by the rough contour is drawn.
E has a color instruction as shown in the figure. Here, Y10, M50, and C20 in the area A are the halftone dot area ratio (hereinafter referred to as "halftone dot%") of the yellow plate when the decomposed plate is created, 10% of the halftone dot of the magenta plate, and the cyan plate. The net% of the black plate is 20%, and the net% of the black plate is 0%.

Next, we photograph the block copy document 260 shown in FIG.
A positive 271 and a negative 272 as shown in FIGS. 7A and 7B are created. Positive 271 is the area A to E shown in the color instruction sheet 265.
Used to create the mask corresponding to. The mask is a laminate of a colorless transparent base film and a light-shielding film, and the light-shielding film can be easily peeled off from the base film, and only the portion where the light-shielding film is peeled off transmits light. Therefore, a desired mask can be produced by cutting the light-shielding film along the contour line of the positive 271 and cutting the light-shielding film by overlapping the positive 271 and the mask.

FIGS. 18 (a), (b), (c), (d), and (e) show the prepared mask, and the non-hatched area is the portion where the light-shielding film is peeled off. In the figure masks 281-2
Reference numerals 85 correspond to the areas A to E, respectively. That is, the mask 281 hides areas other than the areas A1 and A2 of the printed matter 250 shown in FIG. 14, the mask 282 hides areas other than the areas B1 to B6 of the printed matter 250, and the mask 283 hides areas other than the area C1 of the printed matter 250. The mask 284 hides areas other than the areas D1 to D3 of the printed matter 250, and the mask 28
Reference numeral 5 hides areas other than the areas E1 and E2 of the printed matter 250.

Next, a transparent film having halftone dots uniformly provided at a predetermined halftone percentage (hereinafter referred to as "flat halftone") and the above masks 281-2.
A film master for each color is prepared by using 85 and this is done by overlaying a mask and a flat screen onto the film master and printing it to form halftone dots only on desired portions of the film master.

FIG. 19 shows an outline of the steps from the block copy original 260 to the production of the printed matter 250, 291, 292, 293, 294,
295 and 296 are flat nets, and the net percentages are 100%, 20% and 1 respectively.
It is 0%, 50%, 30%, 8%. Incidentally, these various flat screens are prepared in advance. As shown, block copy manuscript 26
As described above, the positive 271 and the negative 272 are created from 0, and the masks 281-285 are created from the positive 271.

Here, the method for producing the yellow plate 241 will be described. For this production, the masks 281, 282, 283, 284 and the flat net 29 are used.
1,292,293 are used. First, mask 281 and flat net 291
And 10 are overlapped with each other and baked on the film original plate to form 10% halftone dots in the area A. Then, the mask 282 and the flat screen 292 are printed on top of each other, the mask 283 and the flat screen 292 are further printed on top of each other, and finally the mask 284 and the flat screen 291 are stacked on top of each other and printed on the same region B, C of the same film original plate, A yellow plate 241 is prepared by forming halftone dots of 20%, 20%, and 100% on D, respectively. Similarly, from the masks 281, 282, 283 and the flat nets 294, 295, 293, the magenta plate 242, the masks 281, 282, 283, 285 and the flat net 292,
Cyan version 243 is created from 293 and 296.

Further, since the black plate 244 is composed only of the contour lines drawn on the block copy document 260 shown in FIG. 15, it is created from the negative 272 and the flat screen 291 shown in FIG. 18 (b) without using a mask. It That is, the negative 272 and the flat net 291 are overlapped and baked on the film original plate to form 100% halftone dots on the contour line portion, and the black plate 244 is produced.

Yellow version 241, magenta version 2 created in this way
A printing plate is created from 42, cyan plate 243, and black plate 244, and overprinted using ink and paper, and printed matter 50
Is created.

As described above, the conventional plate making process of the plain net part is a complicated process using various masks and flat screens, and all of it is done manually, so it takes a long time to make the final film original plate of each color. In addition to the above, there is a problem that an error in the position of the pattern is likely to occur in the work of forming the mask and the overprinting, and it is difficult to obtain a desired printed matter. This problem was more remarkable as the design became more complicated. Then, the applicant of the present invention has proposed an apparatus for performing all the plate-making process of the solid mesh portion which is manually performed by using a computer, thereby improving the efficiency of the plate-making process. There is.

(Problems of the prior art) However, in the apparatus for performing the plate making process of the solid mesh portion using this computer, when outputting the film original plate after performing the color separation processing, the image of the original copy read by the scanner is printed. Data is interpolated, and the image is enlarged according to the resolution of the output device and output on the film.

20 (a) and 20 (b) are explanatory views showing a state in which the image is enlarged by the above-described interpolation processing. FIG. 20 (a) is the original image before enlargement, and FIG. 20 (b) is the enlarged image. The enlarged image is shown. Here, when enlarging the original image 301 as shown in FIG. 20 (a), if the edge portion 301a is simply enlarged, the enlarged image 302 becomes the edge portion as shown in FIG. 20 (b). In some cases, 302a becomes too conspicuous and the contour line becomes rough, making it unusable for printing. Further, if the interpolation processing and various image processings performed as needed are performed on the image data as it is as the raster data, there is a problem that the amount of data becomes enormous and the processing time becomes long.

(Object of the Invention) The present invention has been made in view of the above problems, and a line image drawn on a block original is read by a scanner or the like, and a computer is used based on the read image data. An apparatus that performs color separation processing and directly creates a film original for each color.After performing color separation processing with the data amount reduced by compressing the raster data read by a scanner into run length data, the output device A device that can output a high-quality enlarged image with no rough edges on the film by pseudo-converting the outline of each image into a more natural shape when enlarging the image according to the resolution of The purpose is to provide.

(Summary of the Invention) To achieve this object, the present invention provides an image reading unit for reading a line image drawn on a document, a run length processing unit for compressing the image read by the image reading unit into run length data, and The image data storage means for storing the run length data compressed and extracted by the run length processing means, the image display means for reading the data stored in the image data storage means and displaying the line image, and the line image Color data input means for inputting the divided areas and the ratio of yellow, magenta, cyan, and black of the line image, and image data stored in the image data storage means based on the color data from the color data input means Of the color data input from the color data inputting means, and coloring means for coloring the predetermined area of the The color-separation data creating means for creating and registering the color-separation run-length data for the solid-colored network based on Based on the connection relationship searching means for searching the connection relationship of the expanded run length data, and the edge of an arbitrary section corresponding to the contour of the expanded run length data is subdivided by a predetermined number of steps based on the connection relationship searched by the connection relationship searching means. A plain network comprising smoothing processing means and original output means for outputting a color separation run length data from the color separation data creating means and smoothing run length data subdivided by the smoothing processing means onto a film to create an original. To provide a film original plate making device.

(Operation) In the present invention, the line image drawn on the original is read by the image reading means, and the read image is compressed by the run length processing means and stored in the image data storage means. Then, the image data stored in the image data storage means is read out and displayed on the image display means,
When the area delimited by the line image and the ratio of yellow, magenta, cyan, and black of the line image are input from the color data input means, the coloring means determines the predetermined value of the image data stored in the image data storage means. The area is colored and displayed on the image display means, and the color separation data generation means generates color separation run length data for the plain net. Thereafter, when the compressed run length data is read from the image data storage means, the run length data is expanded in a predetermined direction and a predetermined size by the expansion means, and the connection relationship of the expanded run length data is a connection relationship. When searched by the search means, the smoothing processing means subdivides the edge of an arbitrary section corresponding to the contour of the expanded run length data into a predetermined number of steps, and the subdivided smoothing run length data is created. Then, the color separation run length data and the smoothing run length data are output from the original plate creating means onto the film to create a film original plate for plain netting.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining the configuration of an apparatus showing an example of the present invention. In the figure, reference numeral 1 denotes an input scanner which serves as an image reading means of the present invention, and a line image drawn on a document can be read by scanning a scanning head. The read line density of this input scanner 1 is
18 mm / piece or more is desirable. An interface 2 transfers image data read by an input scanner via a data bus 3 to a magnetic disk device 4 serving as an image storage means of the present invention.

Reference numeral 5 denotes a host computer, which is the coloring means 5a of the present invention,
It has color-separation data creating means 5b, run-length processing means 5c, enlargement processing means 5d, connection relation processing means 5e, smoothing processing means 5f, etc., and controls each part as a whole. 6
Is a display which is an image display means of the present invention, and can read the image data stored in the magnetic disk device 4 and display a line image of the block copy document 260. Reference numeral 7 denotes a tablet which serves as color data input means of the present invention, and yellow (Y), magenta (M), cyan (C) for a predetermined area of the image read from the magnetic disk device 4 and displayed on the display 6. ), Black (K) halftone percentage, color code, or the like can be designated. Then, the coloring means 5a of the host computer 6 colors the designated area based on the color data input from the tablet 7 and displays it on the display 7. Further, 70 is also a preparatory apparatus that serves as color data input means of the present invention, and can provide the position data and color data of the line image drawn on the block copy document 260 to the host computer 5 (details will be described later). . 8
Is a keyboard, which gives an operation start signal to the host computer 5.

Reference numeral 9 denotes an output scanner which is an original output means of the present invention,
When the color separation data created by the color separation data creating means 5a and the smoothing run length data created by the smoothing means 5f are given via the data bus 3, a film original for each color is created based on these data. Ten
Is an interface, which supplies the color separation data and smoothing run length data to the output scanner.

Reference numeral 20 denotes an auxiliary manuscript, which is not drawn on the block copy manuscript 260 but is drawn on the transparent film as an auxiliary line which is necessary for creating the color-separation data. This auxiliary manuscript 20 is used as needed, and when it is used, a color scanner or the like capable of distinguishing and reading the line image on the block copy manuscript 260 and the auxiliary line on the auxiliary manuscript 20 is used. Used as input scanner 1 and display 6
Is used that can display the line image and the auxiliary line separately.

FIG. 2 shows the auxiliary document 20 shown in FIG.
As shown in the figure, the auxiliary document 20 has an auxiliary line 2 on the transparent film 21.
2, 23 and 24 are drawn in a color different from that of the block copy document 260, for example, red. The auxiliary lines 22 and 23 connect the discontinuous portions of the line drawings 261 and 262 drawn on the block copy document 260, and the auxiliary lines 24 are not drawn on the block copy document 260, but are added to the color instruction sheet 260. Is a drawing of the portion represented by the color boundary line 266. The auxiliary manuscript 20 is mainly used when the line image on the block copy manuscript 260 has many discontinuities, and is not necessarily used.

It should be noted that the line image and the auxiliary line image read by the scanner 1 are not limited to those drawn on the block copy document 260 and the auxiliary document 20 as described above, and may be a color different from the copied image when copying the block copy document or the like. You may use what draws the auxiliary line directly in.

Next, the operation of the film original production apparatus for a plain net shown in FIG.

First, the original document 260 on which the auxiliary document 20 is superposed is set at a predetermined position of the scanner 1, and the scanning head of the scanner 1 is scanned to display the line images drawn on the original document 260 and the auxiliary document 20. The image data is read separately, and the read image data is sent to the data bus 3 via the interface 2. The pixel density of the image data captured by the scanner 1 is 18
/ mm, which is considerably rougher 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 the memory (not shown) of the host computer 5,
After being appropriately processed, it is sent again to the data bus 3 and stored in the magnetic disk 4.

FIG. 3 is a flow chart showing the processing of the image data captured by the scanner 1. First, when a start signal is given by operating the keyboard 8 or the like connected to the host computer 5, scanner input of image data is performed (S1), and the captured image data is binarized (S2). , Stored in the memory of the host computer 5. 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 every several lines, and dust removal processing and notch removal processing are performed (S3). The dust removal process is a process that automatically removes pixels of a few pixels or less as dust.
The notch removal process is a process for removing the irregularities of the contour line.
Next, the run length processing means 5c compresses the image data (S4). This data compression is a process of replacing one line of the binarized image data with address data of a point changing from white to black or from black to white.
This is done by creating so-called run length data. The run-length data thus compressed is sent to the data bus 3 by the host computer 5 and stored in the magnetic disk device 4 (S5).

Next, a description will be given of a process until color separation run length data and smoothing run length data are created for the image data stored in the magnetic disk device 4, and a film original plate is created based on these data.

FIG. 4 is a flow chart showing the processing from the creation of various data by the host computer 5 to the creation of the original film, and FIG. 5 is an explanatory view showing the state of the image displayed on the display 6, and FIG. FIG. 6 is an explanatory diagram of a color table used when inputting color data.

First, the keyboard 8 is operated to give a start signal, the image data stored in the magnetic disk device 4 is read (S10), and displayed on the display 6 (S11). On the display 6, as shown in FIG.
And the auxiliary line image of the auxiliary document 20 indicated by the broken line are displayed separately. This distinction is made by changing the displayed color. Here, by the line image and the auxiliary line image, areas a1, a2, b1, b2, b3, b4, b5, b6, c1, d1, d2, d to be colored in the image displayed on the display 6 are displayed.
The boundaries are created for all of 3, d4, d5, e1, and e2.

Next, color data is input using the color table 28 as shown in FIG. 6 (S12). As shown in the drawing, the color table 28 is a table in which color numbers are attached to combinations of halftone dots of each of yellow (Y), magenta (M), cyan (C), and black (K). It is registered in the host computer 5 in advance. When inputting color data, the tablet 7 is operated to operate the areas a1, a2, b1, b2, b3, b4, b5, b6, c1, d1, d2, d3, shown in FIG.
Color instructions are given to d4, d5, e1 and e2. That is,
One area is specified from the above areas by operating the tablet 7, and the color number (shown in FIG. 6) corresponding to the specified area is input by the tablet 7 or the keyboard 5. For example, if the area a1 is specified by the tablet 7, the ratio of each color in this area is determined by the color instruction sheet 261 in FIG.
10% yellow, 50% magenta, 20 cyan
% And black 0%, which corresponds to the color number 1 in the color table 28 shown in FIG.
Enter. In this way the areas a1, a2, b1, b2, b3,
Color instructions are given to all of b4, b5, b6, c1, d1, d2, d3, d4, d5, e1 and e2. Then, color separation processing is performed to perform color classification on the color data input to each of the areas, color separation run length data is created (S13), and the color separation state is displayed on the display 6 (S14). . The display of the color separation state on the display 6 is performed by presetting a color corresponding to the color number shown in FIG. 6 and coloring each area with the set color. Here, on the block copy manuscript, areas c1 and e1 where part or all of the boundary line is missing,
Also for e2, since the boundary line data necessary for the color separation processing performed in step S13 has already been input, the color separation processing is performed without creating new boundary line data on the display 6 or the like. Similarly, for the contour line, the tablet 7 is operated to specify the contour line, and the color number of the color table 28 is input, whereby the color separation processing is performed. In this case, since the solid line portion of the image shown in FIG. 5 actually appears as a contour line, the color number “6” is selected, and the broken line portion does not actually appear as a contour line, so that the line The color number of the area is selected. It should be noted that the broken line portion having no color instruction is treated as colorless (the output scanner 9 as a contour line
It is not output from).

The input of the color number may be performed by displaying a color scale corresponding to each color number on the display 6 and selecting a desired color from the displayed color scale.

After that, it is selected whether or not the color separation run length data is corrected in the color separation processing performed in step S13 (S1
5) If there is a correction, the correction data is input (S16), and the color separation process of step S13 is performed on the corrected portion.
In the case of inputting the correction data, if the color document still lacks the boundary line even if the auxiliary document shown in FIG. 2 is used, the data of the missing boundary line is input on the display 6, or step S12 An operation or the like for changing the color number input in is performed.

If the auxiliary document 20 shown in FIG. 1 is not used, all the data of the boundary lines of colors corresponding to various auxiliary lines on the auxiliary document 20 may be input in step S16.

If there is no correction of the color separation run length data in step S15, the next double processing is performed (S17). The dubbing process is a process of sloping the boundary between colors, and in the case of the printed matter 250 shown in FIG. 11, the above areas a1, a2, b1, b2, b3, b.
4, b5, b6, d1, d2, d3, d4, d5, e1, e2 may be slightly covered with the contour line.

Then, an enlarged image is created (S18). The enlarged image is created by performing interpolation on the color-separated run-length data to enlarge the image to the output resolution, and smoothing the enlarged image to remove the roughness of the contour line (details will be described later). ). The pixel density of the image data captured by the scanner 1 is converted into the pixel density for the film original plate by this enlarged image creation. In this embodiment, the image data of 18 lines / mm is the image data of 72 lines / mm. Is converted to. The pixel density after conversion is not limited to the above example and may be about 30 lines / mm or more.

After this, data conversion processing is performed (S19). The data conversion process is performed by the color separation run length data enlarged in the enlarged image creation in step S18, that is, the areas a1, a2, b1, b.
2, b3, b4, b5, b6, c1, d1, d2, d3, d4, d5, e1 for the color coded data, the color number data, yellow,
The data is converted into halftone data of magenta, cyan and black, and is performed by converting the color number data into Y, M, C and K data of the color table 28 registered in the host computer 5. This means that the color separation data of the printed matter shown in FIG. 14 has been created.

Next, the color separation data created by the data conversion in step S19 is sent to the data bus 3 shown in FIG. 1 and output to the film original plate set on the scanner 9 through the interface 10 to obtain the desired color for each color. An original film is formed on which halftone dots are formed (S20).

Next, the operation of creating an enlarged image in step S17 of FIG. 4 will be described in detail.

FIG. 7 is an explanatory diagram of the operation of creating the enlarged image, and it is assumed that the magnetic disk device 4 stores the run length data 31 as shown in FIG. 7 (a). When the enlarged image creation command is given by operating the keyboard 8 or the like, first, the run length data 31 is read from the magnetic disk device 4, and as shown in FIG. 7 (b) according to the preset enlargement ratio and enlargement direction. Be expanded to. The expanded run-length data 32 corresponds to a simple expansion of the run-length data 11, so that the edges of the sections P _{1 to} P ₂ are considerably unnatural. Here, the connection relation search means searches the connection relation of the run length data in which 5e is expanded, and defines each connection relation. Next, the smoothing processing means 5f causes the changing points E _{1 to} E existing in the sections P _{1 to} P ₂ , for example.
_A new edge processing is performed on the midpoint between the column width and the line width of the adjacent change points between _{11 and the} edges of the sections P _{1 and} P ₂ as shown in FIG. 7C are subdivided from the beginning. Create run-length data that has been converted to natural edges as if they had been converted. The newly created run length data is stored again in the magnetic disk device 4.

In this way, when the line image of the block copy document 260 captured by the input scanner 1 is subjected to color separation processing and enlarged to the output resolution and output to the output scanner 9 to create an original plate for printing, the enlarged image is enlarged from the beginning. Since a line image having a resolution is taken in from the input scanner 1, it is possible to obtain a high-quality printed matter.

FIG. 8 is a flowchart showing in detail the operation of creating an enlarged image in step S18 of FIG.

First, the keyboard 8 or the like is operated to read the run length data stored in the magnetic disk device 4 (S30), and the size of the run length data is enlarged (S3).
1). Next, check the run length connection (S32),
The connection relationship is specified (S33). After this, step S32
The edges of an arbitrary section corresponding to the contour of the binary image are subdivided on the basis of the connection relationship checked in (S34). When the subdivision is completed, the subdivided run length data is registered in the magnetic disk device 4 (S35).

9 (a) and 9 (b) are schematic diagrams for explaining the step operation shown in FIG. 8 in more detail.

In the figure, 41 is run length data, and the numerical value shows the column number. 41a is a run length value, which is a run length data 41 represented by a column number. Reference numeral 42 denotes expanded run-length data, which is data in which the run-length data 41 is expanded vertically and horizontally twice. 42a is a run length value, which is the run length data 42 represented by a column number. 51
Indicates connection-related data, which is composed of prescribed data 51a to 51d. 52a to 52d are subdivided data, which are data obtained by processing each of the specified data 51a to 51d by a predetermined algorithm. 61 is the run length data that has been subdivided, and shows the numerical values and column numbers. 62 is a run length value, which is a column number of the fragmented run length data 61.

As can be seen from these figures, the run length processing means 5c
When the run-length data 41 is generated by the above, the run-length value 41a is obtained, and when the enlarging processing means 5d performs enlarging processing of the run-length data 41, for example, in the vertical and horizontal directions, the extended run The length data 42 is generated and the run length 42a is obtained. Next, the connection relation search means 5e performs a connection relation search on the run length 42a to generate the regulation data 51a to 51d. Regulatory data 51a-5
1d is data forming line elements forming the contour of the expanded run length data 42. When these specified data 51a to 51d are obtained, the smoothing processing means 5f causes the specified data 51a.
.About.51d are corrected to subdivided data 52a to 52d to generate subdivided run length data 61, and a run length value 62 is obtained. In this way, smoothing data is generated, and a smooth contour line without roughness is obtained.

FIG. 10 is a block diagram illustrating the configuration of a preparation device 70 which is another mode of the color data input means of the present invention. In the figure, reference numeral 71 is a main control unit composed of a computer, which has selection screen display means 71a, table creation means 71b, and the like.
Reference numeral 72 denotes an input memory that is a color instruction information storage unit, and the selection screen display unit 71a of the main control unit 71 reads the color instruction information and displays it on the display 73. A tablet input device 74 serves as position data input means, and is composed of a tablet 74a and a stylus pen 74b for designating coordinates. Then, on the tablet 74a, a master copy document or a copy thereof in which a reference position mark such as a register mark is written at a predetermined position is set, and this reference mark is input inside by picking it with a stylus pen 74b. The data is aligned with the existing data, and then each area separated by the line image on the block copy document or its copy is designated. Reference numeral 75 denotes an input unit, which includes a keyboard 75a, a touch pen 75b, and the like,
The touch pen 75b can select and designate a desired Y, M, C, and K dot% on the selection screen 73a displayed on the display unit 73 by pen touch. Reference numeral 76 is an output memory composed of a floppy disk device, for example, and a color table 28 as shown in FIG. And the position data of the color number thereof are stored, and the data stored in the output memory 76 is transferred to the host computer 5 shown in FIG. 1 via a recording medium such as a floppy disk.
Can be entered. Reference numeral 77 denotes an output device including, for example, an XY plotter, which outputs the color number created by the table creating means 71b to a position corresponding to the area pointed by the stylus pen 74b on the transparent film placed at a position not shown.

FIG. 11 is a schematic diagram showing an example of a selection screen displayed on the display 73 shown in FIG. 10, and the same components as those in FIG. 11 are designated by the same reference numerals.

In this figure, 81 is an entry area and a touch pen 75
Y, M, C, K selected by b and their mesh% are sequentially entered without overlapping. 82 is Y, M,
The C and K selection areas are composed of a magenta area 82M, a cyan area 82C, a yellow area 82Y, a black area 82K and the like. 83 is a touch pen in the area for specifying the amount of scratches
The magenta area 82 is selected according to the amount of scratches (1%, 5%, 10% in this embodiment) selected by 75b.
The amount of scratches displayed in M, cyan area 82C, yellow area 82Y, and black area 82K can be changed. Note that in this display example, the magenta (M)
10%, cyan (C) scratches are 5%, yellow (Y) scratches are 10%, and black (K) scratches are 1%.

FIG. 12 is a flow chart for explaining the procedure for creating color data using the preparatory apparatus 70. Color data required for color separation processing performed by the host computer 5 shown in FIG. The procedure for creating is explained.

First, waiting for the block copy document 260 or a copy thereof to be placed at a predetermined position of the tablet input device 74 (S41),
Waiting for input of display command on selection screen 73a (S42), selection screen
When the display command of 73a is input, the color instruction information for creating the selection screen 73a is read from the input memory 72 and displayed.
The selection screen 73a is displayed on 73 (S43). Next, it waits until the desired Y, M, C, K halftone% is selected by the touch pen 75b (S44), and when the desired Y, M, C, K halftone% is selected, the tablet is selected. The master copy 260 placed on the 74a or each area delimited by the line image being copied is waited for one point in the arbitrary area to be picked by the stylus pen 74b (S45), and the area is picked. Then, the selected% of Y, M, C, and K and their color numbers are displayed in color in the etry area 81 as shown in FIG. 8 (S46). The color numbers given to the Y, M, C, K halftone% selected here are 1, 2, 3, ... In the order of selection, and are different from the Y, M, C, K halftone% already selected. Only the thing is displayed in the etry area 111 with a new color number. Then, after performing such an operation on the block copy document 260 or all areas in the copy, it is judged whether or not the picking of the area is completed (S47). If NO, the process returns to step S34, and if YES, the entry area. Outputs the position data of the color table and its color number created in 81 to the memory 76
Register with (S48). Then, it waits for an output command of the color number corresponding to each of the above areas to be input from the input unit 75 (S49), and when input, the position of each area on the film set at the predetermined position of the output device 77 is input. Draw the corresponding color number (S50).

FIG. 13 is an explanatory view showing the film on which the color numbers output from the output device 77 shown in FIG. 10 are drawn, and as shown in the drawing, the color numbers ~ are drawn on the transparent film 90, and their drawing positions. Corresponds to the position of each area separated by the line image of the block copy document 260 shown in FIG. 12, and the color number corresponds to the color instruction sheet 265 shown in FIG. Therefore, by overlaying the transparent film 90 on the block copy document 260 or a copy thereof, a new color instruction sheet in which a color number is attached to each area of the line image can be created.

Further, the color table and the position data of the color number registered in the output memory 76 in step S48 are recorded as color data on a recording medium such as a floppy disk, and this color data is given to the host computer 5 shown in FIG. As a result, the color data in step S12 in FIG. 4 is input, and the color separation processing in step S13 can be automatically performed.

(Effect of the invention) As described above, in the present invention, a line image drawn on a block copy document is read by a scanner or the like, color separation processing is performed using a computer based on the read image data, In the device that directly creates the original film for each color, the raster data read by the scanner is compressed into run-length data to reduce the amount of data. Is expanded to the output resolution, the connection relationship of this expanded run length data is searched, and the edge of any section corresponding to the contour of the expanded run length data is subdivided into a predetermined number of steps by the smoothing processing means, The subdivided smoothing run length data is output on the film together with the color separation run length data obtained by the color separation processing. Therefore, it is possible to suppress an increase in the amount of data processed by a computer and perform color separation processing efficiently, and
The effect is that it is possible to create a film original plate that is composed of a high-quality image with no rough edges.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining the configuration of an apparatus showing an example of the present invention, FIG. 2 is an explanatory diagram of an auxiliary manuscript 20 shown in FIG. 1, and FIG. 3 is image data captured by a scanner 1. FIG. 4 is a flow chart showing the processing from the color separation data creation by the host computer 5 to the film original printing, FIG. 5 is an explanatory view showing the state of the image displayed on the display 6, FIG. 6 is an explanatory diagram of a color table used when inputting color data, and FIGS. 7A, 7B, and 7C are explanatory diagrams of an operation of creating an enlarged image in step S17 of FIG. FIG. 8 is a flow chart showing in detail the operation of creating an enlarged image in step S18 of FIG. 4, and FIGS. 9 (a) and 9 (b) are schematic diagrams for explaining the step operation shown in FIG. 8 in more detail. Figure, Figure 10 A block diagram for explaining the configuration of the preparatory apparatus 70 shown in FIG. 1, and FIG. 11 is a display 73 shown in FIG.
FIG. 12 is a schematic view showing an example of a selection screen displayed in FIG. 12, FIG. 12 is a flow chart for explaining a procedure for creating color data using the preparation device 70, and FIG. 13 is an output device 77 shown in FIG.
Explanatory drawing showing the film on which the color numbers output by the drawing are drawn, FIG. 14 is an explanatory view showing an example of the solid mesh portion of the printed matter, and FIG. 15 is used in the plate making process of the printed matter 250 shown in FIG. FIG. 16 is an explanatory view showing an example of a block copy, FIG. 16 is an explanatory view showing an example of a color instruction sheet used in the plate making process of the printed matter 250 shown in FIG. 14, FIGS. ) Is the artwork 26 shown in FIG.
FIGS. 18 (a), 18 (b), 18 (c), 18 (d) and 18 (e) are illustrations of positive and negative images of 0 taken by a camera, and the printed matter 250 shown in FIG. 14 is produced by a conventional plate making process. FIG. 19 is an explanatory view showing an example of a mask used in this case, FIG. 19 is an explanatory view of a process for producing the printed matter 250 shown in FIG. 14 by a conventional plate making process, and FIGS. 20 (a) and 20 (b). FIG. 6 is an explanatory diagram showing a state in which an image is enlarged by a conventional interpolation process. 1 ... Input scanner 2 ... Interface 3 ... Data bus 4 ... Magnetic disk device 5 ... Host computer 5a ... Coloring means 5b ... Solid halftone color data creating means 5c ... Run length processing means 5d ... ... Enlargement processing means 5e ... Connection-related processing means 5f ... Smoothing processing means 6 ... Display 7 ... Tablet 8 ... Keyboard 9 ... Output scanner 10 ... Interface 20 ... Auxiliary manuscript 70 ... Preparation device 260 …… block copy manuscript

Claims (1)

[Claims] 1. An image reading means for reading a line image drawn on a document, a run length processing means for compressing an image read by the image reading means into run length data, and a run length processing means for compressing and extracting. Image data storage means for storing the run-length data, image display means for reading out the data stored in the image data storage means and displaying the line image, an area separated by the line image and the line image. Color data input means for inputting the ratio of yellow, magenta, cyan, and black,
Coloring means for coloring a predetermined area of the image data stored in the image data storage means on the basis of the color data from the color data input means and displaying it on the image display means, and a color input from the color data input means. Color separation data creating means for creating and registering color separation run length data for plain network based on the data, enlargement processing means for expanding the registered color separation run length data to the output resolution, and this enlargement processing means Based on the connection relationship searching means for searching the connection relationship of the expanded run length data, and the edge of an arbitrary section corresponding to the contour of the expanded run length data is subdivided by a predetermined number of steps based on the connection relationship searched by the connection relationship searching means. The smoothing processing means, the color separation run length data from the color separation data creating means, and the smoothing processing means are subdivided. Smoothing run-length data original film plate producing apparatus for plain network, characterized by comprising an original output means for creating an original and outputs on the film a.