CN112810326A

CN112810326A - Information processing system and method for digital color printing

Info

Publication number: CN112810326A
Application number: CN202011628996.2A
Authority: CN
Inventors: 芮勇
Original assignee: Jiangsu Dongfang Printing Co ltd
Current assignee: Jiangsu Dongfang Printing Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-18

Abstract

The invention relates to an information processing system for digital color printing, which comprises an electronic color separator, a color separation device and a color desktop scanning systematization, wherein the basic structure of the electronic color separator is a precise plate making device which is formed by integrating optical, mechanical, electronic and computer technologies, the precise plate making device comprises an input device, a central processing device and an output record, and the color desktop scanning system comprises the input device, an image processing device and an output device.

Description

Information processing system and method for digital color printing

Technical Field

The invention relates to the field of digital color, in particular to an information processing system and method for digital color printing.

Background

Color printing is a method of copying an image or text in color (corresponding to this, a printing method only using black and white, or monochrome printing). It involves a number of steps, or conversion processes, to produce a high quality color reproduction, and a color separation process for digitally scanning the original to separate the original into red, green, and blue components. Before digital imaging was developed, the traditional method of color separation was to photograph the image 3 times, each time with a filter of the corresponding color to filter out different light.

The existing information processing method for digital color printing has the defects that the screening and processing speed of images is slow, and the obtained colors are easy to distort.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides an information processing system for digital color printing, which comprises an electronic color separator, a scanning color separator and a color desktop scanning systematization, wherein the basic structure of the electronic color separator is a precision plate making device which is formed by integrating optical, mechanical, electronic and computer technologies and consists of three parts, namely input equipment, a central processing unit and output records, and the color desktop scanning system comprises the input equipment, image processing equipment and output equipment.

Preferably, the input device is tasked with inputting information on an original such as text, graphics, images, etc. to a computer.

Preferably, the output device is used for outputting the image-text integrated whole page color separation glue color sample or disk file.

An information processing method for digital color printing,

step S1, decomposing the original color into primary colors to make each primary color printing plate, which is divided into yellow, magenta and cyan printing plates in the printing system;

step S2, measuring the color separation effect;

step S3, inputting the scanning part including scanning head and manuscript roller, the important parts are light source, color filter and photomultiplier;

step S4, the central processing unit computer can perform various calculations such as correction, modification and emphasis of color signals;

step S5, outputting a recording part composed of a recording head and a recording drum;

and step S6, displaying color distribution of the dots.

An information processing method for digital color printing according to claim 1, characterized in that: the step S1: according to the principle of subtractive color method, an original is shot or scanned by using RGB three color filters to obtain CMY three color separation information, decomposed C, M and Y three-color printing plates are coated on the printing plates with corresponding colors by using three primary color inks, and then the colors of the original are superposed and reproduced successively on paper, wherein the transmittance of the color filters is as follows: blue: 50-55%, green: 60-65%, red: 70 to 80 percent

Preferably, the step S2: the typical color in the color scale is divided into a basic color and an opposite color, then the density of a black color block in the color separation sheet is used as a standard for measuring the basic color, and the density of a white color block is used as a standard for the opposite color.

Preferably, the step S3: an optical signal reflecting the gradation and color components of the original is converted into an electric signal.

Preferably, the step S5: and converting the processed electric signal into an optical signal to be exposed and recorded on the photosensitive sheet.

Preferably, the step S6: screen dot overprinting color: the more lines, the smaller dots, the richer the gradation of the picture expression; the fewer the number of lines, the coarser the screen composed of dots.

Has the advantages that:

the screening and processing speed is high, the optical signals reflecting the light and shade gradation and the color components of the manuscript are changed into electric signals, the processed electric signals are converted into optical signals to be exposed and recorded on a photosensitive sheet, and the screen dot overprinting is finished: the more lines, the smaller dots, the richer the levels of the picture expression; the fewer the number of lines, the coarser the screen composed of dots.

Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a basic schematic diagram of the system of the present invention;

FIG. 2 is a schematic diagram of the color table scanning system of the present invention;

FIG. 3 is a schematic diagram of the electronic color separator of the present invention;

FIG. 4 is a schematic diagram of the distribution of dots in accordance with the present invention;

FIG. 5 is a schematic diagram of the dot shape of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An information processing system for digital colour printing is composed of electronic colour separator with scanning colour separation and colour table scan systematization, and the basic structure of electronic colour separator is a precise plate-making equipment which is composed of optical, mechanical, electronic and computer technologies and is composed of input unit, CPU and output record.

Preferably, the input device is tasked with inputting information on an original such as text, graphics, images, etc. to the computer.

Preferably, the output device is used for outputting the picture-text integrated whole page color separation glue color sample or disk file.

One specific application of this embodiment is: the original color is decomposed into primary colors to make various primary color printing plates, which are divided into yellow, magenta and cyan printing plates in a printing system, the input scanning part comprises a scanning head and an original roller, the important parts are a light source, a color filter and a photomultiplier, a central processing unit computer can carry out various calculations such as correction, modification, emphasis and the like of color signals, an output recording part comprises a recording head and a recording roller, the dots are in color distribution, yellow ink for the first printing is set, and the area ratio is as follows: white: 1-y, yellow: y second cyan ink, area ratio white: (1-y) - (1-y) c ═ 1-y (1-c) yellow: y-yc ═ 1-c) y, green: yc, cyan (1-y) c third red, area ratio, white: (1-y) (1-c) - (1-y) (1-c) m ═ 1-y) (1-c) (1-m), yellow: (1-c) y- (1-c) ym ═ 1-c (1-m) ygreen: yc-cym ═ (1-m) cy, cyan: (1-y) c- (1-y) cm ═ 1-y) (1-m) c fuchsin: (1-y) (1-c) m, red: (1-c) ym blue: (1-y) cm, black: cym, according to the subtractive method principle, using RGB three color filters to shoot or scan the original to obtain CMY three color separation information, using three primary colors ink to coat the decomposed C, M, Y three color printing plates on the printing plate with corresponding colors, and then overlapping the printing plates on the paper to reproduce the original colors, wherein the transmittance of the color filters is: blue: 50-55%, green: 60-65%, red: 70-80%, firstly, dividing typical colors in a color scale into a basic color and an opposite color, then, taking the density of a black color block in a color separation sheet as a measurement standard of the basic color, taking the density of a white color block as a standard of the opposite color, converting optical signals reflecting the light and shade gradation and color components of an original into electric signals, converting the processed electric signals into the optical signals, exposing and recording the optical signals on a photosensitive sheet, and carrying out dot overprinting to form the color: the more lines, the smaller dots, the richer the gradation of the picture expression; the fewer the number of lines, the coarser the screen composed of dots.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments have not been described in detail to avoid obscuring the description of the invention in its specific form, and it is to be understood that many modifications and variations are possible in light of the teaching of this specification. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An information processing system for digital color printing, comprising: the system comprises an electronic color separator and a color desktop scanning systematization, wherein the electronic color separator consists of an input scanning part, a central processing unit and an output recording part, and the color desktop scanning system comprises an input device, an image processing device and an output device.

2. An information processing system for digital color printing according to claim 1, wherein: the input device inputs information on the text, the graphics and the image manuscript to a computer.

3. An information processing system for digital color printing according to claim 1, wherein: the central processing unit corrects, modifies and emphasizes the color signals to calculate o.

4. An information processing system for digital color printing according to claim 1, wherein: the output device is used for outputting the image-text integrated whole page color separation glue color sample or disk file.

5. An information processing method for digital color printing, characterized in that:

step S1: decomposing the original color into primary colors to make primary color printing plates, and dividing the primary color printing plates into yellow, magenta and cyan printing plates in a printing system;

step S2: measuring the color separation effect;

step S3: correcting, modifying and emphasizing the color signals;

step S4: an output recording section composed of a recording head and a recording drum;

step S5: the dot color distribution is o.

6. An information processing method for digital color printing according to claim 5, characterized in that: the steps S1, S4: setting yellow ink for the first printing, wherein the area ratio is white: 1-y, yellow: y second cyan ink, area ratio white: (1-y) - (1-y) c ═ 1-y (1-c) yellow: y-yc ═ 1-c) y, green: yc, cyan: (1-y) c third red, area ratio, white: (1-y) (1-c) - (1-y) (1-c) m ═ 1-y) (1-c) (1-m), yellow: (1-c) y- (1-c) ym ═ 1-c (1-m) ygreen: yc-cym ═ (1-m) cy, cyan: (1-y) c- (1-y) cm ═ 1-y) (1-m) c fuchsin: (1-y) (1-c) m, red: (1-c) ym blue: (1-y) cm, black: cym, according to the subtractive method principle, using RGB three color filters to shoot or scan the original to obtain CMY three color separation information, using three primary colors ink to coat the decomposed C, M, Y three color printing plates on the printing plate with corresponding colors, and then overlapping the printing plates on the paper to reproduce the original colors, wherein the transmittance of the color filters is: blue: 50-55%, green: 60-65%, red: 70-80%.

7. An information processing method for digital color printing according to claim 5, characterized in that: the step S2: the typical color in the color scale is divided into a basic color and an opposite color, then the density of a black color block in the color separation sheet is used as a standard for measuring the basic color, and the density of a white color block is used as a standard for the opposite color.

8. An information processing method for digital color printing according to claim 5, characterized in that: the step S3: and converting the processed electric signal into an optical signal to be exposed and recorded on the photosensitive sheet.

9. An information processing method for digital color printing according to claim 5, characterized in that: the step S5: screen dot overprinting color: the more lines, the smaller dots, the richer the levels of the picture expression; the fewer the number of lines, the coarser the screen composed of dots.