Colorful picture six color separation printing method

A printing method and color map technology, applied in the field of printing, can solve the problems such as the collision of various color plates on the screen, the color of the printed matter is not bright and full, etc.

CN100576067CInactive Publication Date: 2009-12-30THE PLA INFORMATION ENG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2009-12-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a six-color separation printing method of a color chart, effectively resolving the problems that the color of the prints is not bright and full, and each color version is easy to generate bumping net phenomenon under the prior equipment and technical condition, the technical solution includes following steps: the manuscript is scanned to a digital image of red, green and blue mode, changed to a digital image of CIELAB color mode after the color space conversion, divided into a six-color separation version data of yellow, magenta, cyan, black, orange and green by an algorithm of six-color separation, the data is outputted to a screening film by amplitude modulation and screening of a camera after explained of a raster image processor, burnt to a printing plate by a copyboard, printing by a printer, or outputted by amplitude modulation and screening of a direct platemaker, the prints is printed by the printer, the invention greatly improves the quality of the prints, the prints have bright and full color, each color version does not produce bumping net phenomenon, especially for printing high exquisite articles.
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Description

1. Technical field

[0001] The invention relates to a printing method, in particular to a six-color separation printing method for a color image. 2. Background technology

[0002] For a long time, color printing has been using yellow, magenta, cyan, and black four-color printing, but the defect of this printing technology is that it does not perform well for brightly colored printed matter, and there is a considerable gap between the color of printed matter and photos. With the further increase in demand, the printing volume of high-end boutique jobs is increasing, and it is not enough to use only four-color printing. Multi-color printing and color separation printing technology have emerged as the times require.

[0003] In the period of photographic color separation plate making, due to the limitation of analog color separation technology, multi-color color separation could not be realized at that time; in the period of electric extension machine color separation plate maki...

Examples

Embodiment Construction

[0010] The specific implementation manners of the present invention will be described in detail below in combination with actual conditions.

[0011] The six-color color separation printing method of the color picture of the present invention is as figure 1 As shown, the specific steps are as follows:

[0012] The first step: the original is scanned into a digital image in red, green and blue (RGB) color mode;

[0013] The second step: through color space conversion, that is, using image processing software photoshop to perform color mode conversion, the digital image in RGB color mode is changed into a digital image in CIELAB (a color representation method formulated by the International Commission on Illumination) color mode;

[0014] The third step: use the six-color separation algorithm to decompose the digital image of CIELAB color mode into yellow, magenta, cyan, black, orange and green six-color color separation version data;

[0015] For any digital image original, t...