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A spectral color separation method for a multi-color printing printing system

A printing system and color separation technology, applied in printing, printing machines, general parts of printing machinery, etc., can solve the problems of complex implementation, difficult to pre-estimate the determination of mixed metric weights, etc., to improve the color separation efficiency and avoid the same color difference. Spectral problems, satisfying the effect of high-fidelity color reproduction

Inactive Publication Date: 2015-12-30
WUHAN UNIV
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Problems solved by technology

However, since the determination of the mixed metric weight is difficult to estimate in advance, this method can only determine the weight through multiple color separation optimization methods, and the implementation is more complicated
For the above problems, no corresponding solutions have been proposed in the academic and industrial circles to simultaneously improve the efficiency of the reverse color separation process of the cell partition YNSN model and the improvement of the comprehensive accuracy of color separation

Method used

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  • A spectral color separation method for a multi-color printing printing system
  • A spectral color separation method for a multi-color printing printing system

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Embodiment

[0029] Embodiment comprises the following steps:

[0030] 1) Split the sub-model of the multi-color printing printing system, and split the original system into W sub-models P1, P2...PW with the number of ink colors m. Generally, the value of m can be taken as 3 or 4.

[0031] In the embodiment, the value of W is 5, the value of m is 4, and the five 4-color sub-models obtained by splitting are CMYK, CYRG, CMRB, MYKR and CYGB.

[0032] 2) Use the inhull algorithm in the field of computer graphics to judge whether the spectrum to be separated is within the color gamut of a certain sub-model one by one. The inhull algorithm is a prior art, see:

[0033] http: / / www.mathworks.com / matlabcentral / fileexchange / 10226-inhull

[0034] 3) Assume that the color gamut obtained in 2) contains a total of T sub-models including the spectrum to be separated, which are respectively denoted as P1, P2...PT. When 1≤T≤W, these T sub-models form a sample set P. If the color to be separated The spe...

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Abstract

The invention discloses a color separation method of a spectrum of a printing system with multicolor printing. The color separation method comprises the following steps of splitting sub-models of the printing system with multicolor printing, and judging whether a spectrum for color separation is arranged in a color gamut of one sub-model one by one so as to form a sample set P; further splitting each sub-model in P to a plurality of super cells and mini cells, wherein the super cells are formed by a certain number of mini cells; judging whether the spectrum for color separation is arranged in one super type one by one so as to form a sample set C; taking an error of the spectrum as evaluation measurement, selecting P optimal cellule from all mini cells included in the super cells from C, carrying out color separation on the spectrum in each mini cell by taking phi as evaluation measurement, and taking a color separation ink quantity value with optimal phi precision as a final color separation ink quantity value so as to complete color separation. According to the color separation method, the color separation precision of the printing system with multicolor printing is guaranteed, the color separation efficiency and the measurement switchover flexibility are remarkably improved, and the color separation method is convenient for implementation and has higher applicability in the field of high-fidelity color copy.

Description

technical field [0001] The invention belongs to the technical field of multi-color printing and printing color reproduction, and in particular relates to a cell partition YNSN model spectral color separation method by means of rapid determination of color separation intervals and step-by-step mixing measurement optimization. Background technique [0002] Multi-color printing Printing color reproduction technology has the advantages of wide reproduction color gamut, rich reproduction technology layers and clear details, and is currently the mainstream technology in the field of image reproduction. However, due to the large number of primary colors in the multi-color printing printing system, the current overall modeling of the system still has problems such as huge sampling pressure and low modeling efficiency. In addition, considering the inherent physical and chemical properties of inks, inks and other colorants and printing materials, multi-color overprinting with too many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41F33/00G06F19/00
Inventor 万晓霞刘强李放梁金星付马朱时良
Owner WUHAN UNIV
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