CN104309300B - Computer coloring method for color printing ink - Google Patents
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- CN104309300B CN104309300B CN201410601191.7A CN201410601191A CN104309300B CN 104309300 B CN104309300 B CN 104309300B CN 201410601191 A CN201410601191 A CN 201410601191A CN 104309300 B CN104309300 B CN 104309300B
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- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000004040 coloring Methods 0.000 title claims abstract description 25
- 238000007639 printing Methods 0.000 title abstract description 15
- 230000004075 alteration Effects 0.000 claims abstract description 21
- 238000013528 artificial neural network Methods 0.000 claims abstract description 10
- 238000001055 reflectance spectroscopy Methods 0.000 claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 13
- 230000007935 neutral effect Effects 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 10
- 238000012937 correction Methods 0.000 claims description 7
- 238000001579 optical reflectometry Methods 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 4
- 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 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 8
- 238000003860 storage Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 206010068052 Mosaicism Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007640 computer printing Methods 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
- 239000011159 matrix material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005259 measurement Methods 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
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 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, more particularly to a kind of litho ink computer for colouring method.
Background technology
Color matching refers to the requirement according to original copy color, with colored ink kind as few as possible and adjuvant, proportionally
Mix the operating process of the ink with certain particular color and performance.
With the improvement of living standards, color requirements more and more higher of the people to printed matter, especially chromatograp.Separately
Outward, because the computer printing ink color matching system of many, has occurred in making rapid progress for computer technology, but still without one kind
The color matching system of each printing enterprise and all kinds of ink raw materials can preferably be adapted to.First it is printing ink color matching in color matching is printed
The foundation of system is complicated, and computer for colouring system includes the analytical instrument of complexity, calculates storage hardware etc.；Establish maturation
The scheme originally set up if the ink that the program is used is changed after scheme of colour cannot be reused, or be unable to reach original
Effect；Even if because very trickle its formula of the ink color distortion of each manufacturer production also has notable difference, existing color matching
Scheme cannot solve the general sex chromosome mosaicism of different vendor.
Someone sets about the research of this respect in industry, and such as Chinese patent discloses a kind of complex frequency spectrum printing ink color matching side
Method and system, application number：200910080925.0, the applying date：2009-03-26, it is characterised in that including basic color ink and
Ink core database, wherein, described basic color ink is including any at least three kinds different ink, and three kinds of ink
Two kinds of form and aspect are less than 180 ° in the angulation of multifrequency spectral space；The ink core database include secondary color database,
Brightness template and whiteness template；Wherein, in basic color ink described in the secondary color database purchase and the basic color ink
The color parameter of any two kinds of ink and each secondary color of various different proportions allotment, the color parameter includes form and aspect, bright
Degree and whiteness；The brightness template storage becomes the brightness adjustment ink needed for ink brightness adjustment △ L, wherein △ L for brightness value
Change amount；Described described each secondary color of whiteness template storage adjusts form and aspect --- the whiteness variation relation after ink proportioning with whiteness.
The patent solves CIE theories based on " standard colorimetric observer XYZ tristimulus values ", there is color balance, aberration
The problems such as calculating, but this technical scheme is theoretical using single color matching, lacks robustness and fault-tolerance（Even if there is mistake
Parameter or loss of data will not also make system crash）, application aspect is then in the treatment of various actual tasks in the absence of spirit
The possibility used living.
The content of the invention
In view of the shortcomings of the prior art, the invention reside in the printing ink color matching method and system for providing a kind of color printing.
To achieve the above object, the technical scheme is that：
A kind of litho ink computer for colouring method, it is characterised in that comprise the following steps：
Step one, carries out value of chromatism setting, when aberration is more than 1.5, using Kubelka- according to the aberration requirement of sample
Munk color matching methods, when aberration is less than or equal to 1.5, using neutral net color matching method, described Kubelka-Munk color matchings
Method can use by Kubelka-Munk theory based on Spectral Visual Matching Method, computer reflection spectrometry color matching,
One kind in computerized color matching approximate algorithm, described neutral net color matching method can be matched somebody with somebody using the computer based on BP neural network
Color method；Interaction of the light with granules of pigments and the physical property of ink are must take into consideration during printing during ink Overlay,
In practical application, it should say in K-M theories comprising two double constants, respectively absorption coefficient K and scattering coefficient S, ink is to light
Scattering power can ignore compared with the scattering power of matrix, thus the color rendering principle of ink is mainly selection of the ink to light
Property absorb, and ink is influenceed to the absorbability of incident light by ink film thickness and printing ink concentration, and K-M theories are with opaque
Put forward premised on medium, and the ink used in printing is transparent or translucence, therefore, K-M theories may be led
Cause precision not enough, therefore introduce neutral net color matching method in systems；
Step 2, gathers basic data；
Step 3, correction error.
Specifically, described collection basic data concrete operations are to use the hectograph of the non-printing-ink of electronic balance weighing
The weight of paper and art paper, and write down numbering and weight；By blue or green, pinkish red, Yellow ink individually in offset paper and art paper
On print out several battens, and take five battens respectively as spot color standard specimen from offset paper and art paper；The sample that will be singled out
Bar is individually placed to be weighed on electronic balance again, and writes down weight now, calculates the quantity of ink of unit area；Use light splitting
Photometer takes ten differences and measures respectively on five art paper battens respectively, respectively obtains ten component light reflectivity numbers
Value, and average value is calculated respectively；Taking ten differences respectively on five offset paper battens respectively using spectrophotometer is carried out
Measurement, respectively obtains ten component optical reflection values, and calculate average value respectively；By each cell mean and list described in this step
Based on the quantity of ink of position in the selected color matching method of parameter input step one.
Specifically, described correction error is, uses the offset paper and art paper of the non-printing-ink of electronic balance weighing
Weight, and write down numbering and weight；Blue or green, pinkish red, Yellow ink is well mixed according to arbitrary proportion, then respectively in offset paper
With several battens are printed out on art paper, and take five battens respectively as spot color standard specimen from offset paper and art paper；To choose
The batten selected is individually placed to be weighed on electronic balance again, and writes down weight now, calculates the quantity of ink of unit area；
Ten differences are taken respectively on five art paper battens using spectrophotometer respectively to measure, respectively obtain ten component light
Reflectivity values, and average value is calculated respectively；Ten are taken respectively not on five offset paper battens respectively using spectrophotometer
Measured with putting, respectively obtain ten component optical reflection values, and calculate average value respectively, each group described in this step is put down
Blue or green, the pinkish red, proportioning of Yellow ink is calculated in average and the selected colour matching method of unit ink amount input step one；To this
Blue or green, pinkish red, Yellow ink the proportioning that blue or green, pinkish red, the ratio of Yellow ink mixing and colour matching method described in step are calculated
Compare and be can be used after manual synchronizing error.
Beneficial effects of the present invention are：Can be automatically selected favorably according to different actual conditions the invention enables color printing operation
Color matching method, and because use nerual network technique, with outstanding robustness and fault-tolerance.
Specific embodiment
The present invention is described in further detail with reference to embodiment.
Embodiment 1
A kind of litho ink computer for colouring method, comprises the following steps：
Step one, carries out value of chromatism setting, when aberration is more than 1.5, using Kubelka- according to the aberration requirement of sample
Munk color matching methods, when aberration is less than or equal to 1.5, using neutral net color matching method, described Kubelka-Munk color matchings
Method is so as to the computer reflection spectrometry color matching based on Kubelka-Munk theories（Described computer reflectance spectrum
Method, and the color matching of computer reflection spectrometry, computerized color matching approximate algorithm, the computer for colouring method based on BP neural network are equal
It is existing conventional meanses, therefore is repeated no more in embodiment）, described neutral net color matching method is using based on BP neural network
Computer for colouring method；
Step 2, using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and write down numbering and
Weight；Blue or green, pinkish red, Yellow ink is individually printed out into several battens on offset paper and art paper, and from offset paper
Five battens are taken respectively with art paper as spot color standard specimen；The batten that will be singled out is individually placed to be weighed on electronic balance again,
And weight now is write down, calculate the quantity of ink of unit area；Using spectrophotometer respectively on five art paper battens
Ten differences are taken respectively to measure, and respectively obtain ten component optical reflection values, and calculate average value respectively；Use light splitting
Photometer takes ten differences and measures respectively on five offset paper battens respectively, respectively obtains ten component light reflectivity numbers
Value, and average value is calculated respectively；By parameter input step based on each cell mean and unit ink amount described in this step
In one selected color matching method；
Step 3, using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and write down numbering and
Weight；Blue or green, pinkish red, Yellow ink is well mixed according to arbitrary proportion, is then printed out on offset paper and art paper respectively
Several battens, and five battens are taken respectively as spot color standard specimen from offset paper and art paper；The batten that will be singled out divides again
It is not placed on electronic balance and weighs, and write down weight now, calculates the quantity of ink of unit area；Scored using spectrophotometric
Do not take ten differences respectively on five art paper battens to measure, respectively obtain ten component optical reflection values, and divide
Average value is not calculated；Ten differences are taken respectively on five offset paper battens using spectrophotometer respectively to measure, point
Ten component optical reflection values are not obtained, and calculates average value respectively, by each cell mean described in this step and unit oil
Blue or green, the pinkish red, proportioning of Yellow ink is calculated in the ink amount selected colour matching method of input step one；By described in this step it is blue or green,
Blue or green, pinkish red, Yellow ink the proportioning that pinkish red, the ratio of Yellow ink mixing and colour matching method are calculated is compared and artificial
Be can be used after correction error.
Application method is：
Ten differences are taken respectively on the batten that client provides using spectrophotometer to measure, and respectively obtain ten groups
Dichroic reflection rate score, and average value is calculated respectively；To be calculated in the selected colour matching method of each cell mean input step one
Blue or green, the pinkish red, proportioning of Yellow ink, in actual production, should on a small quantity make ink and detect aberration after proportioning is calculated
Whether Customer Standard is reached, and qualified rear can be mass.
Embodiment 2
A kind of litho ink computer for colouring method, comprises the following steps：
Step one, carries out value of chromatism setting, when aberration is more than 1.5, using Kubelka- according to the aberration requirement of sample
Munk color matching methods, when aberration is less than or equal to 1.5, using neutral net color matching method, described Kubelka-Munk color matchings
Method uses the Spectral Visual Matching Method based on Kubelka-Munk theories to match colors, described neutral net color matching method
Using the computer for colouring method based on BP neural network；
Step 2, using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and write down numbering and
Weight；Blue or green, pinkish red, Yellow ink is individually printed out into several battens on offset paper and art paper, and from offset paper
Five battens are taken respectively with art paper as spot color standard specimen；The batten that will be singled out is individually placed to be weighed on electronic balance again,
And weight now is write down, calculate the quantity of ink of unit area；Using spectrophotometer respectively on five art paper battens
Ten differences are taken respectively to measure, and respectively obtain ten component optical reflection values, and calculate average value respectively；Use light splitting
Photometer takes ten differences and measures respectively on five offset paper battens respectively, respectively obtains ten component light reflectivity numbers
Value, and average value is calculated respectively；By parameter input step based on each cell mean and unit ink amount described in this step
In one selected color matching method；
Step 3, using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and write down numbering and
Weight；Blue or green, pinkish red, Yellow ink is well mixed according to arbitrary proportion, is then printed out on offset paper and art paper respectively
Several battens, and five battens are taken respectively as spot color standard specimen from offset paper and art paper；The batten that will be singled out divides again
It is not placed on electronic balance and weighs, and write down weight now, calculates the quantity of ink of unit area；Scored using spectrophotometric
Do not take ten differences respectively on five art paper battens to measure, respectively obtain ten component optical reflection values, and divide
Average value is not calculated；Ten differences are taken respectively on five offset paper battens using spectrophotometer respectively to measure, point
Ten component optical reflection values are not obtained, and calculates average value respectively, by each cell mean described in this step and unit oil
Blue or green, the pinkish red, proportioning of Yellow ink is calculated in the ink amount selected colour matching method of input step one；By described in this step it is blue or green,
Blue or green, pinkish red, Yellow ink the proportioning that pinkish red, the ratio of Yellow ink mixing and colour matching method are calculated is compared and artificial
Be can be used after correction error.
Embodiment 3
A kind of litho ink computer for colouring method, comprises the following steps：
Step one, carries out value of chromatism setting, when aberration is more than 1.5, using Kubelka- according to the aberration requirement of sample
Munk color matching methods, when aberration is less than or equal to 1.5, using neutral net color matching method, described Kubelka-Munk color matchings
Method uses the computerized color matching approximate algorithm based on Kubelka-Munk theories to match colors, described neutral net color matching method
Using the computer for colouring method based on BP neural network；
Step 2, using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and write down numbering and
Weight；Blue or green, pinkish red, Yellow ink is individually printed out into several battens on offset paper and art paper, and from offset paper
Five battens are taken respectively with art paper as spot color standard specimen；The batten that will be singled out is individually placed to be weighed on electronic balance again,
And weight now is write down, calculate the quantity of ink of unit area；Using spectrophotometer respectively on five art paper battens
Ten differences are taken respectively to measure, and respectively obtain ten component optical reflection values, and calculate average value respectively；Use light splitting
Photometer takes ten differences and measures respectively on five offset paper battens respectively, respectively obtains ten component light reflectivity numbers
Value, and average value is calculated respectively；By parameter input step based on each cell mean and unit ink amount described in this step
In one selected color matching method；
Step 3, using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and write down numbering and
Weight；Blue or green, pinkish red, Yellow ink is well mixed according to arbitrary proportion, is then printed out on offset paper and art paper respectively
Several battens, and five battens are taken respectively as spot color standard specimen from offset paper and art paper；The batten that will be singled out divides again
It is not placed on electronic balance and weighs, and write down weight now, calculates the quantity of ink of unit area；Scored using spectrophotometric
Do not take ten differences respectively on five art paper battens to measure, respectively obtain ten component optical reflection values, and divide
Average value is not calculated；Ten differences are taken respectively on five offset paper battens using spectrophotometer respectively to measure, point
Ten component optical reflection values are not obtained, and calculates average value respectively, by each cell mean described in this step and unit oil
Blue or green, the pinkish red, proportioning of Yellow ink is calculated in the ink amount selected colour matching method of input step one；By described in this step it is blue or green,
Blue or green, pinkish red, Yellow ink the proportioning that pinkish red, the ratio of Yellow ink mixing and colour matching method are calculated is compared and artificial
Be can be used after correction error.
Merely illustrating the principles of the invention described in above-described embodiment and specification and most preferred embodiment, are not departing from this
On the premise of spirit and scope, various changes and modifications of the present invention are possible, and these changes and improvements both fall within requirement and protect
In the scope of the invention of shield.
Claims (2)
1. a kind of litho ink computer for colouring method, it is characterised in that comprise the following steps：
Step one, carries out value of chromatism setting, when aberration is more than 1.5, using Kubelka-Munk according to the aberration requirement of sample
Color matching method, when aberration is less than or equal to 1.5, using neutral net color matching method, described Kubelka-Munk color matching methods
Spectral Visual Matching Method, the color matching of computer reflection spectrometry, the computer based on Kubelka-Munk theories can be used
One kind in color matching approximate algorithm, described neutral net color matching method can be using the computer for colouring side based on BP neural network
Method；
Step 2, gathers basic data, and described collection basic data concrete operations are to use the non-off-set oil of electronic balance weighing
The offset paper of ink and the weight of art paper, and write down numbering and weight；By blue or green, pinkish red, Yellow ink individually in offset paper
With several battens are printed out on art paper, and take five battens respectively as spot color standard specimen from offset paper and art paper；To choose
The batten selected is individually placed to be weighed on electronic balance again, and writes down weight now, calculates the quantity of ink of unit area；
Ten differences are taken respectively on five art paper battens using spectrophotometer respectively to measure, respectively obtain ten component light
Reflectivity values, and average value is calculated respectively；Ten are taken respectively not on five offset paper battens respectively using spectrophotometer
Measured with putting, respectively obtain ten component optical reflection values, and calculate average value respectively；Each group described in this step is put down
Based on average and unit ink amount in the selected color matching method of parameter input step one；
Step 3, correction error.
2. a kind of litho ink computer for colouring method according to claim 1, it is characterised in that：Described correction error
Using the offset paper and the weight of art paper of the non-printing-ink of electronic balance weighing, and to write down numbering and weight；By blue or green, product
Red, Yellow ink is well mixed according to arbitrary proportion, then prints out several battens on offset paper and art paper respectively, and
Five battens are taken respectively as spot color standard specimen from offset paper and art paper；The batten that will be singled out is individually placed to electronic balance again
On weigh, and write down weight now, calculate the quantity of ink of unit area；Using spectrophotometer respectively in five art papers
Ten differences are taken on batten respectively to measure, ten component optical reflection values is respectively obtained, and calculate average value respectively；Make
Ten differences are taken respectively on five offset paper battens with spectrophotometer respectively to measure, respectively obtain ten component light anti-
Rate score is penetrated, and calculates average value respectively, by each cell mean described in this step and the institute of unit ink amount input step one
Blue or green, the pinkish red, proportioning of Yellow ink is calculated in the colour matching method of selection；Blue or green, pinkish red, Yellow ink described in this step is mixed
Ratio and blue or green, pinkish red, Yellow ink the proportioning that colour matching method is calculated compare and after manual synchronizing error by make
With.
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| 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 |
| 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 |
| CN109117135B (en) * | 2018-07-24 | 2022-06-03 | 中国石油天然气集团有限公司 | Method and device for determining color scheme |
| CN113910797B (en) * | 2021-11-15 | 2022-11-11 | 南京林业大学 | Printing ink color matching method for improving color matching precision |
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| JPH0894442A (en) * | 1994-09-20 | 1996-04-12 | Toto Ltd | Computerrized color matching method |
| JP3440597B2 (en) * | 1994-12-20 | 2003-08-25 | 東陶機器株式会社 | Computer color matching method |
| JPH09229773A (en) * | 1996-02-22 | 1997-09-05 | Toto Ltd | Computerized color matching method |
| GB0009011D0 (en) * | 2000-04-13 | 2000-05-31 | Coats Viyella Plc | Dye formulating |
| US20020184168A1 (en) * | 2001-06-05 | 2002-12-05 | Mcclanahan Craig J. | System and method for determining acceptability of proposed color solution using an artificial intelligence based tolerance model |
| CN103264578B (en) * | 2013-05-21 | 2016-01-20 | 暨南大学 | The printing spot color color matching method that density based is measured |
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