CN104309300A - Computer coloring method for color printing ink - Google Patents
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- CN104309300A CN104309300A CN201410601191.7A CN201410601191A CN104309300A CN 104309300 A CN104309300 A CN 104309300A CN 201410601191 A CN201410601191 A CN 201410601191A CN 104309300 A CN104309300 A CN 104309300A
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- 238000000034 method Methods 0.000 title claims abstract description 73
- 238000004040 coloring Methods 0.000 title claims abstract description 27
- 238000007639 printing Methods 0.000 title abstract description 16
- 230000004075 alteration Effects 0.000 claims abstract description 20
- 238000001055 reflectance spectroscopy Methods 0.000 claims abstract description 6
- 244000025254 Cannabis sativa Species 0.000 claims description 26
- 230000003287 optical effect Effects 0.000 claims description 21
- 230000007935 neutral effect Effects 0.000 claims description 17
- 238000005303 weighing Methods 0.000 claims description 10
- 230000003595 spectral effect Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000001228 spectrum Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000013528 artificial neural network Methods 0.000 abstract 4
- 230000008569 process Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000007640 computer printing Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
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Abstract
The invention provides a computer coloring method for color printing ink. The computer coloring method for color printing ink includes: setting a chromatic aberration value according to chromatic aberration requirements of a sample, adopting a Kubelka-Munk coloring method when the chromatic aberration is larger than 1.5, and adopting a neural network coloring method when the chromatic aberration is smaller than 1.5, wherein the Kubelka-Munk coloring method can be one of a spectrum vision matching method, a computer reflection spectroscopy and a computer coloring closing algorithm which are based on the Kubelka-Munk theory, and the neural network coloring method can be a computer coloring method based on a BP (back propagation) neural network. Favorable coloring methods can be chosen automatically according to different practical situations during color printing, and the computer coloring method for color printing ink is excellent in robustness and fault tolerance by the aid of the neural network technology.
Description
Technical field
The present invention relates to color printing technical field, particularly relate to a kind of litho ink computer for colouring method.
Background technology
Color matching refers to the requirement according to original copy color, with the least possible colored ink kind and adjuvant, proportionally mixes the operating process of the ink with certain particular color and performance.
Along with growth in the living standard, people are to printed matter, and especially the color requirements of chromatograp is more and more higher.In addition, because making rapid progress of computer technology, there is many computer printing ink color matching systems, but still there is no a kind of color matching system that better can adapt to each printing enterprise and all kinds of ink raw materials.In printing color matching, be first that the foundation of printing ink color matching system is complicated, computer for colouring system includes complicated analytical instrument, calculates storage hardware etc.; If change the ink that the program uses after establishing ripe scheme of colour, the scheme originally set up cannot re-use, or cannot reach original effect; Even if its formula very trickle of the ink color distortion due to each manufacturers produce also has notable difference, existing scheme of colour cannot solve the versatility problem of different vendor.
In industry, someone sets about the research of this respect, such as Chinese patent discloses a kind of complex frequency spectrum printing ink color matching method and system, application number: 200910080925.0, the applying date: 2009-03-26, it is characterized in that, comprise Essential colour ink and ink core database, wherein, described Essential colour ink comprises at least three kinds of different ink, and in these three kinds of ink, the form and aspect of any two kinds are less than 180 ° at the angulation in complex frequency spectrum space; Described ink core database comprises secondary color database, brightness template and whiteness template; Wherein, the color parameter of each secondary color of any two kinds of ink and the allotment of various different proportion in Essential colour ink described in described secondary color database purchase and described Essential colour ink, described color parameter comprises form and aspect, brightness and whiteness; Described brightness template stores the brightness adjustment ink needed for ink brightness adjustment △ L, and wherein △ L is brightness value variable quantity; Each secondary color and whiteness described in described whiteness template stores adjust form and aspect---the whiteness variation relation after black proportioning.
It is theoretical based on " standard colorimetric observer XYZ tristimulus values " that this patent solves CIE, there is the problem such as color balance, Colorimetry, but this technical scheme adopts single color matching theoretical, lack robustness and fault-tolerance (even if occurring that wrong parameter or loss of data also can not make system crash), then there is not the possibility of applying in a flexible way in application aspect in the process of various actual task.
Summary of the invention
For the deficiencies in the prior art, the invention reside in printing ink color matching method and system that a kind of color printing is provided.
For achieving the above object, the present invention is achieved by following technical proposals:
A kind of litho ink computer for colouring method, is characterized in that, comprise the following steps:
Step one, require to carry out value of chromatism setting according to the aberration of sample, when aberration is greater than 1.5, adopt Kubelka-Munk color matching method, when aberration is less than or equal to 1.5, adopt neutral net color matching method, described Kubelka-Munk color matching method can use the one in the color matching of Spectral Visual Matching Method based on Kubelka-Munk theory, computer reflection spectrometry, computerized color matching approximate algorithm, and described neutral net color matching method can adopt the computer for colouring method based on BP neutral net, the interaction of light and granules of pigments and the physical property of ink must be considered during ink Overlay during printing, in actual applications, should say in K-M theory and comprise two two constants, be respectively absorption coefficient K and scattering coefficient S, ink can be ignored compared with the scattering power of matrix the scattering power of light, thus the color rendering principle of ink mainly ink to the selective absorbing of light, and ink is subject to the impact of ink film thickness and printing ink concentration to the absorbability of incident light, K-M theory puts forward premised on opaque medium, and the ink used in printing is the transparency or translucence, therefore, K-M theory may cause precision not enough, therefore introduce neutral net color matching method in systems in which,
Step 2, gathers basic data;
Step 3, correction error.
Particularly, described collection basic data concrete operations are, use the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and write down numbering and weight; Green grass or young crops, magenta, Yellow ink are individually printed out several battens on offset paper and art paper, and gets five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; By in the color matching method based on each cell mean described in this step and unit ink amount selected by parameters input step one.
Particularly, described correction error is, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are mixed according to arbitrary proportion, then on offset paper and art paper, prints out several battens respectively, and get five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value, the proportioning of green grass or young crops, magenta, Yellow ink will be calculated in the colour matching method selected by each cell mean described in this step and unit ink amount input step one; The proportioning of the green grass or young crops ratio of the green grass or young crops described in this step, magenta, Yellow ink mixing and colour matching method calculated, magenta, Yellow ink is carried out such as and can use after manual synchronizing error.
Beneficial effect of the present invention is: the invention enables color printing operation can automatically select favourable color matching method according to different actual conditions, and because adopt nerual network technique, has outstanding robustness and fault-tolerance.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A kind of litho ink computer for colouring method, comprises the following steps:
Step one, require to carry out value of chromatism setting according to the aberration of sample, when aberration is greater than 1.5, adopt Kubelka-Munk color matching method, when aberration is less than or equal to 1.5, adopt neutral net color matching method, described color matching method is to use computer reflection spectrometry color matching (the described computer reflection spectrometry based on Kubelka-Munk theory, and the color matching of computer reflection spectrometry, computerized color matching approximate algorithm, computer for colouring method based on BP neutral net is existing conventional means, therefore repeat no more in embodiment), described neutral net color matching method adopts the computer for colouring method based on BP neutral net,
Step 2, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are individually printed out several battens on offset paper and art paper, and gets five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; By in the color matching method based on each cell mean described in this step and unit ink amount selected by parameters input step one;
Step 3, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are mixed according to arbitrary proportion, then on offset paper and art paper, prints out several battens respectively, and get five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value, the proportioning of green grass or young crops, magenta, Yellow ink will be calculated in the colour matching method selected by each cell mean described in this step and unit ink amount input step one; The proportioning of the green grass or young crops ratio of the green grass or young crops described in this step, magenta, Yellow ink mixing and colour matching method calculated, magenta, Yellow ink is carried out such as and can use after manual synchronizing error.
Using method is:
The batten using spectrophotometer to provide client gets ten differences respectively measure, obtain ten component optical reflection values respectively, and calculating mean value respectively; To calculate the proportioning of green grass or young crops, magenta, Yellow ink in colour matching method selected by each cell mean input step one, in actual production, should make ink on a small quantity and detect aberration whether reach Customer Standard after calculating proportioning, qualified rear can be mass.
Embodiment 2
A kind of litho ink computer for colouring method, comprises the following steps:
Step one, require to carry out value of chromatism setting according to the aberration of sample, when aberration is greater than 1.5, adopt Kubelka-Munk color matching method, when aberration is less than or equal to 1.5, adopt neutral net color matching method, described color matching method uses the Spectral Visual Matching Method color matching based on Kubelka-Munk theory, and described neutral net color matching method adopts the computer for colouring method based on BP neutral net;
Step 2, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are individually printed out several battens on offset paper and art paper, and gets five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; By in the color matching method based on each cell mean described in this step and unit ink amount selected by parameters input step one;
Step 3, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are mixed according to arbitrary proportion, then on offset paper and art paper, prints out several battens respectively, and get five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value, the proportioning of green grass or young crops, magenta, Yellow ink will be calculated in the colour matching method selected by each cell mean described in this step and unit ink amount input step one; The proportioning of the green grass or young crops ratio of the green grass or young crops described in this step, magenta, Yellow ink mixing and colour matching method calculated, magenta, Yellow ink is carried out such as and can use after manual synchronizing error.
Embodiment 3
A kind of litho ink computer for colouring method, comprises the following steps:
Step one, require to carry out value of chromatism setting according to the aberration of sample, when aberration is greater than 1.5, adopt Kubelka-Munk color matching method, when aberration is less than or equal to 1.5, adopt neutral net color matching method, described color matching method uses the computerized color matching approximate algorithm color matching based on Kubelka-Munk theory, and described neutral net color matching method adopts the computer for colouring method based on BP neutral net;
Step 2, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are individually printed out several battens on offset paper and art paper, and gets five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; By in the color matching method based on each cell mean described in this step and unit ink amount selected by parameters input step one;
Step 3, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are mixed according to arbitrary proportion, then on offset paper and art paper, prints out several battens respectively, and get five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value, the proportioning of green grass or young crops, magenta, Yellow ink will be calculated in the colour matching method selected by each cell mean described in this step and unit ink amount input step one; The proportioning of the green grass or young crops ratio of the green grass or young crops described in this step, magenta, Yellow ink mixing and colour matching method calculated, magenta, Yellow ink is carried out such as and can use after manual synchronizing error.
What describe in above-described embodiment and description just illustrates principle of the present invention and most preferred embodiment; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.
Claims (3)
1. a litho ink computer for colouring method, is characterized in that, comprises the following steps:
Step one, require to carry out value of chromatism setting according to the aberration of sample, when aberration is greater than 1.5, adopt Kubelka-Munk color matching method, when aberration is less than or equal to 1.5, adopt neutral net color matching method, described color matching method can use the one in Spectral Visual Matching Method based on Kubelka-Munk theory, the color matching of computer reflection spectrometry, computerized color matching approximate algorithm, and described neutral net color matching method can adopt the computer for colouring method based on BP neutral net;
Step 2, gathers basic data;
Step 3, correction error.
2. a kind of litho ink computer for colouring method according to claim 1, is characterized in that: described collection basic data concrete operations are, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are individually printed out several battens on offset paper and art paper, and gets five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; By in the color matching method based on each cell mean described in this step and unit ink amount selected by parameters input step one.
3. a kind of litho ink computer for colouring method according to claim 1, is characterized in that: described correction error is, uses the offset paper of the non-printing-ink of electronic balance weighing and the weight of art paper, and writes down numbering and weight; Green grass or young crops, magenta, Yellow ink are mixed according to arbitrary proportion, then on offset paper and art paper, prints out several battens respectively, and get five battens respectively as spot color standard specimen from offset paper and art paper; The batten picked out is placed on electronic balance again respectively and weighs, and write down weight now, calculate the quantity of ink of unit are; Use spectrophotometer on five art paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value; Use spectrophotometer on five offset paper battens, get ten differences respectively respectively to measure, obtain ten component optical reflection values respectively, and difference calculating mean value, the proportioning of green grass or young crops, magenta, Yellow ink will be calculated in the colour matching method selected by each cell mean described in this step and unit ink amount input step one; The proportioning of the green grass or young crops ratio of the green grass or young crops described in this step, magenta, Yellow ink mixing and colour matching method calculated, magenta, Yellow ink is carried out such as and can use after manual synchronizing error.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620033A (en) * | 2016-03-24 | 2016-06-01 | 上海彩瑞油墨有限公司 | Intelligent water-based ink color blending working process |
| CN106956505A (en) * | 2017-03-27 | 2017-07-18 | 深圳华新彩印制版有限公司 | The acquisition methods and device of a kind of ink usage |
| CN109117135A (en) * | 2018-07-24 | 2019-01-01 | 中国石油天然气集团有限公司 | A kind of method and device of determining scheme of colour |
| CN109246330A (en) * | 2017-07-11 | 2019-01-18 | 宝成工业股份有限公司 | Spray printing chases after color method and its system |
| TWI657939B (en) * | 2017-07-11 | 2019-05-01 | 寶成工業股份有限公司 | Color-correcting printing system |
| CN113910797A (en) * | 2021-11-15 | 2022-01-11 | 南京林业大学 | Printing ink color matching method for improving color matching precision |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105620033A (en) * | 2016-03-24 | 2016-06-01 | 上海彩瑞油墨有限公司 | Intelligent water-based ink color blending working process |
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| CN109246330A (en) * | 2017-07-11 | 2019-01-18 | 宝成工业股份有限公司 | Spray printing chases after color method and its system |
| TWI657939B (en) * | 2017-07-11 | 2019-05-01 | 寶成工業股份有限公司 | Color-correcting printing system |
| CN109117135A (en) * | 2018-07-24 | 2019-01-01 | 中国石油天然气集团有限公司 | A kind of method and device of determining scheme of colour |
| CN113910797A (en) * | 2021-11-15 | 2022-01-11 | 南京林业大学 | Printing ink color matching method for improving color matching precision |
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