JPS62262861A - Photoengraving method for computer graphics image printing - Google Patents

Abstract

PURPOSE:To permit the cost of photoengraving in color printing of a CG image and eventually the considerable reduction of a printing cost by omitting a costly stage for color sepn. CONSTITUTION:A personal computer 1 processes the CG image data consisting of R, G, B signals by processing the same by progressive print output (conversion) software (program) for converting said data to four primary color data for printing consisting of the signals respectively indicating the four primary colors for printing, i.e., black, red, yellow, and blue and supplies the data on the max. four primary colors to a printer 2. The printer 2 prints out the max. four sheets of block copies X, R, Y, B for the respective colors respectively with any one color among black, red, yellow and blue or one color among the same and the black according to the data in the four primary colors for printing supplied from the computer 1. For example, the printer prints out all of the block copies X, R, Y, and B with the black or blue and black. There is an effect of improving the finish of the block copies if the block copies are printed with the black and another one color in the above-mentioned manner.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to computer graphics (CG) devices, video cameras, image scanners, etc.
The present invention relates to a method for producing a printing plate for printing a G image, that is, a plate making method for printing a 06 image.

[Conventional technology and its problems]

Conventionally, in order to print a CG image in color, the red (R), green (G), and blue (B) signals of the CG image data are printed in the four primary colors;
In other words, it is converted into signals that indicate black, red, yellow, and blue, respectively, and the color block printed out using a four-color printer is separated into colors using a color scanner, etc., and four sheets corresponding to each of the four primary colors are generated. The method used is to make a printing plate and run it through a printing press. However, with such conventional plate-making methods for color printing of CG images, color scanners are expensive and the cost of the color separation process is extremely high, so there is a problem that the overall printing cost itself is high. there were.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a printing plate for printing CG images that can be produced at low cost by omitting the color separation process. The purpose is to provide a plate-making method.

[Means for solving problems]

CG of this invention made to solve the above problems
The plate making method for image printing is red (R), green (G), blue (B).
) A process of converting CG image data consisting of signals into four primary printing color data consisting of signals indicating each of the four printing primary colors of black, red, yellow, and blue; and a maximum of four primary color data obtained in this way. The process of printing out each color in one arbitrary color or one arbitrary color and ink; using each of the up to four prints printed out in this way as a printing plate, up to four printing plates for each primary color of printing. It is characterized by consisting of the process of making; and;

〔Example〕

Below, computer graphics (C
G) An embodiment of a plate-making method for image printing will be described with reference to the drawings.

The hardware used in the method of this embodiment includes a video camera 11, a Fronbi disk device 12, a mouse 13
, an image scanner 14, a personal computer 1 having input means such as a keyboard 15, a printer 2, and a plate making machine 3 such as an electrophotographic plate making machine.

First, in the personal computer 1, image input data input from a video camera 11, a floppy disk 12, or an image scanner 14 is processed and edited by image production software using a mouse 13 and a keyboard 15 as auxiliary input means. ,red(
A CG image consisting of R), green (G), and blue (B) signals is created, and the data is stored in memory.

Next, the personal computer 1 performs R, G.

The CG image data consisting of the B signal is used as the 4 primary colors of printing, that is, the 4 signals of printing consisting of signals indicating each of black, red, yellow, and blue.
The data is processed by color separation output (conversion) software (program) that converts the data into primary color data, and the data of the above four primary colors is supplied to the printer 2 at most. In accordance with the four primary color data for printing supplied from the personal computer 1, the printer 2 prints up to four plates X and R1 of each color layer.
Print out Y and B in black, one color of red, yellow, and blue, or one of these colors and black.

For example, all of the blocks X, R, Y, and B are printed out in black or in blue and black. Printing with black and one other color has the effect of improving the finish of the block. Note that if the output data of the personal computer 1 is missing data for one of the colors, for example, blue, The printer 2 outputs each of the three color layers (X, R, Y) excluding the missing blue color as described above.

The plates X, R, Y, and B obtained in this way are printed on the plate making machine 3.
and color printing plates X', R',
The plates are made into Y' and B'.

〔Effect of the invention〕

According to the plate-making method for printing CG images according to the present invention, an expensive color separation step can be omitted, so that the plate-making cost for color printing of CG images and, by extension, the printing cost can be significantly reduced.

[Brief explanation of drawings]

The figure is a block diagram illustrating the configuration of an embodiment of the plate making method for printing CG images according to the present invention. 1...Personal computer for CG, 2.
...Printer, 3...Plate making machine.

Claims (1)

[Claims] Computer graphics (CG) image data consisting of red (R), green (G), and blue (B) signals consists of signals each indicating the four primary colors of black, red, yellow, and blue printing. A process of converting the data into four primary color data for printing; A process of printing out each of the up to four primary color data obtained in this way in one arbitrary color or one arbitrary color and black; A process of making up to four printing plates for each primary color of printing, using up to four prints of each color as printing plates;