CN109706759A - A kind of digit printing single channel ink amount method for limiting based on gamut area - Google Patents
A kind of digit printing single channel ink amount method for limiting based on gamut area Download PDFInfo
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- CN109706759A CN109706759A CN201811640207.XA CN201811640207A CN109706759A CN 109706759 A CN109706759 A CN 109706759A CN 201811640207 A CN201811640207 A CN 201811640207A CN 109706759 A CN109706759 A CN 109706759A
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Abstract
The present invention is a kind of respectively to combine enclosed triangle area size according to the imbibition situation of each channel contrast step-wedge and CMY to determine the single pass ink amount limitation range of CMY based on the digit printing single channel ink amount method for limiting of gamut area, the coloration of the corresponding CMYRGB colors of acquisition is combined with the difference ink amount of CMY, and the maximum black foundation for measuring limitation of single channel is determined as final with the gamut area size that each combination CMYRGB coloration is surrounded.The present invention obtains color lump chromatic value as main data source, relative to only more objective and accurate with eye-observation imbibition situation using color measuring apparatus.Using the present invention in digit printing, be conducive to the color reproduction of digit printing, reasonable single channel ink amount limitation can make color performance of the spray printing device on corresponding fabric reach maximization.
Description
Technical field
The invention belongs to textile printing and dyeing field, specially a kind of digit printing single channel ink amount limitation based on gamut area
Method.
Background technique
Digital ink-jet printed is the product of printing technology and the present computer technology blending, by digitizing to production equipment
Processing makes stamp production process realize digitlization.To reach raising production efficiency with completely new production model, product matter is improved
Amount, reduces environmental pollution energetically, and printing technique is made to enter a brand-new epoch.The characteristic of its on-demand stamp ink-jet, realizes
The production of customized type small lot meets portions of client individual customization to change the production and sales theory of print, dress ornament
Demand.
Single channel ink amount is limited in digit printing as the basis in digit printing production technology, total with density curve
Same-action, to ensure the accurate duplication of color.According to different printed fabrics, slurry, ink and spray printing device need to determine with
Corresponding density curve and the maximum ink amount limitation of single channel, so as to obtain relatively high saturation degree on the fabric
Color on the spot and effective control color on the spot imbibition.Currently, most enterprises in actual production limit single channel ink amount
System determines single pass maximum ink amount mostly to observe the imbibition situation of each channel contrast step-wedge.
Summary of the invention
The present invention is for the maximum ink amount limitation of single channel in current digit printing production technology only with each channel contrast ladder
The imbibition situation of ruler proposes more relatively reasonable method as the method for judgment basis on this basis.The present invention according to
The imbibition situation of each channel contrast step-wedge limits range to determine that the single pass ink of CMY is measured, and combines acquisition with the difference ink amount of CMY
The coloration of corresponding CMYRGB colors, the gamut area size surrounded with each combination CMYRGB coloration is as final
Determine the foundation of the maximum ink amount limitation of single channel.
The technical solution adopted by the present invention to solve the technical problems the following steps are included:
Step 1. designs and produces single channel contrast step-wedge, determines the control range of the maximum ink amount of single channel
1-1 generates software ColorPort using professional test chart and makes CMY single channel contrast step-wedge, and step-wedge is according to site
60%-100% is interval with 5%.
1-2 is using spray printing device in the case where being not loaded with any density curve, and spray printing is set on examining qualified fabric
The CMY single channel contrast step-wedge of production is counted, and is evaporated and washing conditions carry out evaporating washing according to corresponding, by sample manuscript ironing
Color data acquisition is carried out after smooth.
1-3 is used on X-Rite i1Pro spectrophotometer or other common color data acquisition equipments measurement sample manuscript
CMY single channel contrast step-wedge, obtains the chromatic value (L of each color lump*、a*、b*) and density value (D), to test sample manuscript when measurement data
Multiple data acquisition is carried out, the data repeatedly measured are analyzed, rejecting is averaged after wherein fluctuating biggish data.
1-4 uses a in its chromatic value according to the permutation and combination of each dot percentage of CMY*And b *It draws in a coordinate system
Triangle simultaneously calculates triangle area by formula 1, and the size surrounded according to its corresponding chromatic value simultaneously combines real
Border imbibition measures range to determine that maximum is black.
Formula 1:
Step 2. designs and produces CMYRGB combined test mark version
2-1 is arranged combination, and the CMY combination of two in combination is obtained according to the maximum ink amount range of single channel of CMY
Obtain the data (R M+Y, G C+Y, B C+M) of tri- secondary colours of RGB.
CMYRGB data splitting is generated software ColorPort(using professional test chart to 2-2 or other charts are generated and surveyed
Measure software) generate test resolution.
The production of step 3.CMYRGB test resolution spray printing and color data obtain
In the case that 3-1 is not loaded with any color management and density curve using spray printing device, on examining qualified fabric
Spray printing CMYRGB test resolution, and accordingly evaporate and washing conditions under complete evaporate washing.
3-2 is used on X-Rite i1Pro spectrophotometer or other common color data acquisition equipments measurement sample manuscript
CMYRGB combined test chart obtains the chromatic value (L of each color lump*、a*、b*), test sample manuscript is repeatedly counted when measurement data
According to acquisition, the data repeatedly measured are analyzed, rejecting is averaged after wherein fluctuating biggish data.
Step 4. calculates the gamut area that each combination CMYRGB coloration is surrounded
The a in chromatic value that 4-1 is combined using each CMYRGB*Finger and b *Value is drawn in a coordinate system with six points of CMYRGB as end
The hexagon of point.
4-2 calculates the area of each group hexagon, by being four triangles by hexagon dismantling, is counted respectively using formula 1
Summation, which obtains in hex area or other mapping softwares, after calculation area directly calculates hex area.
The gamut area size that step 5. is surrounded by comparing CMYRGB combines the gamut map drawn to determine single channel most
Great Mo amount
Compare each CMYRGB and combine the gamut map that the size combination of surrounded gamut area is drawn, takes large area as far as possible
In the case of so that the black magnitude of maximum in each channel CMY is unlikely to excessive, guarantee that the imbibition of color lump on the spot can be controlled effectively, record
The site value and density value of the CMY is controlled as the equipment for the single channel ink amount maximum value of the test cloth, and in ink amount
It is configured in panel.
Preferably, designed and produced the calculating of CMYRGB combined test mark version in step 2 for gamut area compare and
Analysis.It is different from using imbibition situation as judging that single channel ink amount KB limit obtains conventional method, this method utilizes calculating ratio
Determine that single channel ink amount limits range compared with the area that the chromatic value of CMY single channel contrast step-wedge combines, then by by each channel CMY
Value in ink amount limitation range carries out permutation and combination generation CMYRGB test mark version and passes through calculating for obtaining CMYRGB colour gamut
Each combined area determines single channel ink amount limits value, and this method is using chromatic value measured by color measuring apparatus as calculating
Basis is more objective and accurate.
Preferably, the dot data in CMYRGB combined test mark version in step 2, is compared by calculating in step 1
What the size of the chromatic value combination of CMY single channel contrast step-wedge obtained.This method quickly determines that CMY is each logical by the operation
Road single channel ink amount limits range, and as the basic data of CMYRGB combined test, i.e., first preliminary screening determines fine after range
It solves.
Preferably, the hexagon conduct that this method is surrounded by using the combination of CMYRGB represents equipment and can show
The colour gamut of color gamut, the gamut area is bigger, equipment can show color is abundanter, can be in not imbibition by this method
In the case where, the maximum ink amount limits value of the single channel of acquisition can make equipment have bigger color representation ability.Combination CMYRGB
The colour gamut surrounded is in irregular hexagon, and asking can calculate or pass through by being divided into four triangles when its area
Other mapping softwares directly calculate acquisition, and Atria point coordinate is respectively (x1, y1), (x2, y2), (x3, y3), and pass through formula
2 calculate triangle area.
Formula 2:
Preferably, when obtaining color data using measuring device in the process, after multiple measurement analysis rejecting abnormalities data
The obtaining value method for taking mean value, caused by the reasons such as misoperation or the equipment fault during single measurement can be effectively avoided
Data exception, the data that the method being repeatedly averaged obtains are also more accurate relative to single measurement, to ensure finally to be obtained
The single channel limits value obtained is suitable for producing.
Effect of the invention is as follows: the present invention in digit printing prior art in the limitation of single channel ink amount only with
Method of the imbibition situation as subjective judgement foundation, propose using the area of the CMYRGB colour gamut surrounded as it is objective judgement according to
According to and in conjunction with this subjective judgement foundation of imbibition situation, obtains the maximum ink of single channel in digit printing production and measure limits value；This hair
It is bright that color lump chromatic value is obtained as main data source using color measuring apparatus, relative to only with eye-observation imbibition situation more
What is added is objective and accurate；Using the present invention in digit printing, be conducive to the color reproduction of digit printing, reasonable single channel
Ink amount limitation can make color performance of the spray printing device on corresponding fabric reach maximization.
Detailed description of the invention
Fig. 1 is the flow chart of the embodiment of the present invention.
Fig. 2 is CMY single channel 60%-100% with the contrast step-wedge that 5% is interval.
Fig. 3 is respectively combined the colour gamut surrounded by CMY.
Fig. 4 is CMYRGB combined test figure.
Fig. 5 is respectively combined by CMYRGB encloses hexagon colour gamut.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, below by accompanying drawings and embodiments, to this
Invention is further elaborated.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention,
The range being not intended to restrict the invention.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to keep away
Exempt from unnecessarily to obscure idea of the invention.
As shown in Figures 1 to 5, a kind of digit printing single channel ink amount method for limiting based on gamut area, including it is following
Step:
Step 1. designs and produces single channel contrast step-wedge, determines the control range of the maximum ink amount of single channel
1-1 generates software ColorPort using professional test chart and makes CMY single channel contrast step-wedge, and step-wedge is according to site
60%-100% is interval with 5%, as shown in Figure 2.
1-2 is using spray printing device in the case where being not loaded with any density curve, and spray printing is set on examining qualified fabric
The CMY single channel contrast step-wedge of production is counted, and is evaporated and washing conditions carry out evaporating washing according to corresponding, by sample manuscript ironing
Color data acquisition is carried out after smooth.
1-3 is used on X-Rite i1Pro spectrophotometer or other common color data acquisition equipments measurement sample manuscript
CMY single channel contrast step-wedge, obtains the chromatic value (L of each color lump*、a*、b*) and density value (D), to test sample manuscript when measurement data
Multiple data acquisition is carried out, the data repeatedly measured are analyzed, rejecting is averaged after wherein fluctuating biggish data.
1-4 uses a in its chromatic value according to the permutation and combination of each dot percentage of CMY*And b *It draws in a coordinate system
Triangle as shown in Figure 3 simultaneously calculates triangle area by formula 1, and the area surrounded according to its corresponding chromatic value is big
It is small and determine maximum ink amount range in conjunction with practical imbibition.
Formula 1:
Step 2. designs and produces CMYRGB combined test mark version
2-1 is arranged combination, and the CMY combination of two in combination is obtained according to the maximum ink amount range of single channel of CMY
Obtain the data (R M+Y, G C+Y, B C+M) of tri- secondary colours of RGB.
CMYRGB data splitting is generated software ColorPort using professional test chart to 2-2 or other charts are generated and surveyed
Software Create test resolution as shown in Figure 4 is measured, when making chart, since there are the identical colors of color in each permutation and combination
Block, can the spray printing color lump it is primary, when calculating, reuses the color data of the color lump.
2-3 obtains test resolution data for the ease of measuring device, and color lump sequence is upset, reduces adjacent color lump to measurement
Interference.
The production of step 3.CMYRGB test resolution spray printing and color data obtain
In the case that 3-1 is not loaded with any color management and density curve using spray printing device, on examining qualified fabric
Spray printing CMYRGB test resolution, and accordingly evaporate and washing conditions under complete evaporate washing.
3-2 is used on X-Rite i1Pro spectrophotometer (or other common color data acquisition equipments) measurement sample manuscript
CMYRGB combined test chart obtains the chromatic value (L of each color lump*、a*、b*).Test sample manuscript is repeatedly counted when measurement data
According to acquisition, the data repeatedly measured are analyzed, rejecting is averaged after wherein fluctuating biggish data.
Step 4. calculates the gamut area that each combination CMYRGB coloration is surrounded
The a in chromatic value that 4-1 is combined using each CMYRGB*Finger and b *Value is drawn in a coordinate system with six points of CMYRGB as end
The hexagon of point, as shown in Figure 5.
4-2 calculates the area of each group hexagon, by calculating separately hexagon dismantling using formula 1 for four triangles
Summation obtains in hex area or other mapping softwares and directly calculates hex area after area.
The gamut area size that step 5. is surrounded by comparing CMYRGB combines the gamut map drawn to determine single channel most
Great Mo amount
Compare each CMYRGB and combine the gamut map that the size combination of surrounded gamut area is drawn, takes large area as far as possible
In the case of so that the black magnitude of maximum in each channel CMY is unlikely to excessive, guarantee that the imbibition of color lump on the spot can be controlled effectively, record
The site value and density value of the CMY is controlled as the equipment for the single channel ink amount maximum value of the test cloth, and in ink amount
It is configured in panel.
More specifically, calculating of the CMYRGB combined test mark version for gamut area in step 2 has been designed and produced to compare
And analysis.It is different from using imbibition situation as judging that single channel ink amount KB limit obtains conventional method, this method is using calculating
The area for comparing the chromatic value combination of CMY single channel contrast step-wedge determines that single channel ink amount limits range, then by the way that CMY is each logical
Value in road ink amount limitation range carries out permutation and combination generation CMYRGB test mark version and passes through meter for obtaining CMYRGB colour gamut
Each combined area is calculated to determine single channel ink amount limits value, this method is using chromatic value measured by color measuring apparatus as meter
It is more objective and accurate to calculate basis.
More specifically, the dot data in the CMYRGB combined test mark version in step 2, passes through in step 1
Calculate the size acquisition for the chromatic value combination for comparing CMY single channel contrast step-wedge.This method is quickly true by the operation
Determine each channel single channel ink amount limitation range of CMY, as the basic data of CMYRGB combined test, i.e., first preliminary screening determines model
It is finely solved after enclosing.
More specifically, the hexagon that this method is surrounded by using the combination of CMYRGB, which is used as, represents equipment institute energy table
The colour gamut of existing color gamut, the gamut area is bigger, equipment can show color is abundanter, can be not permeable by this method
In the case where change, the maximum ink amount limits value of the single channel of acquisition can make equipment have bigger color representation ability.The combination
The colour gamut that CMYRGB is surrounded be in irregular hexagon, ask can be calculated by being divided into four triangles when its area or
Person directly calculates acquisition by other mapping softwares, and Atria point coordinate is respectively (x1, y1), (x2, y2), (x3, y3), and lead to
It crosses formula 2 and calculates triangle area.
Formula 2:
More specifically, when using measuring device to obtain color data in the process, multiple measurement is used to analyze rejecting abnormalities data
The obtaining value method of mean value is taken afterwards.The reasons such as the misoperation or equipment fault during single measurement can be effectively avoided to cause
Data exception, the data that the method that is repeatedly averaged obtains are also more accurate relative to single measurement, to ensure final institute
The single channel limits value of acquisition is suitable for producing.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (5)
1. a kind of digit printing single channel ink amount method for limiting based on gamut area, it is characterised in that the following steps are included:
Step 1. designs and produces single channel contrast step-wedge, determines the control range of the maximum ink amount of single channel
1-1 generates software ColorPort using professional test chart and makes CMY single channel contrast step-wedge, and step-wedge is according to site
60%-100% is interval with 5%；
1-2 is using spray printing device in the case where being not loaded with any density curve, and spray printing design is made on examining qualified fabric
The CMY single channel contrast step-wedge of work, and evaporated and washing conditions carry out evaporating washing according to corresponding, sample manuscript ironing is smooth
Color data acquisition is carried out afterwards；
1-3 is mono- using the CMY on X-Rite i1Pro spectrophotometer or other common color data acquisition equipments measurement sample manuscript
Channel contrast step-wedge, obtains the chromatic value (L*, a*, b*) and density value (D) of each color lump, and when measurement data carries out test sample manuscript
Multiple data acquisition, analyzes the data repeatedly measured, and rejecting is averaged after wherein fluctuating biggish data；
1-4 draws three using a* the and b * in its chromatic value according to the permutation and combination of each dot percentage of CMY in a coordinate system
Angular and calculate triangle area by formula 1, the size surrounded according to its corresponding chromatic value simultaneously combines practical
Imbibition measures range to determine that maximum is black
Formula 1:
；
Step 2. designs and produces CMYRGB combined test mark version
2-1 is arranged combination, and the CMY combination of two in combination is obtained according to the maximum ink amount range of single channel of CMY
Obtain the data (R M+Y, G C+Y, B C+M) of tri- secondary colours of RGB；
CMYRGB data splitting is generated software ColorPort using professional test chart to 2-2 or the generation measurement of other charts is soft
Part generates test resolution；
The production of step 3.CMYRGB test resolution spray printing and color data obtain
In the case that 3-1 is not loaded with any color management and density curve using spray printing device, on examining qualified fabric
Spray printing CMYRGB test resolution, and accordingly evaporate and washing conditions under complete evaporate washing;
3-2 uses the CMYRGB on X-Rite i1Pro spectrophotometer or other common color data acquisition equipments measurement sample manuscript
Combined test chart, obtains the chromatic value (L*, a*, b*) of each color lump, and when measurement data carries out multiple data to test sample manuscript and adopts
Collection, analyzes the data repeatedly measured, and rejecting is averaged after wherein fluctuating biggish data；
Step 4. calculates the gamut area that each combination CMYRGB coloration is surrounded
The a* in chromatic value that 4-1 is combined using each CMYRGB refers to draw in a coordinate system with b * value
The hexagon of endpoint；
4-2 calculates the area of each group hexagon, by being four triangles by hexagon dismantling, calculates separately face using formula 1
Summation obtains in hex area or other mapping softwares and directly calculates hex area after product；
The gamut area size that step 5. is surrounded by comparing CMYRGB combines the gamut map drawn to determine the maximum ink of single channel
Amount
Compare each CMYRGB and combine the gamut map that the size combination of surrounded gamut area is drawn, takes large area as far as possible
In the case of so that the black magnitude of maximum in each channel CMY is unlikely to excessive, guarantee that the imbibition of color lump on the spot can be controlled effectively, record
The site value and density value of the CMY is controlled as the equipment for the single channel ink amount maximum value of the test cloth, and in ink amount
It is configured in panel.
2. a kind of digit printing ink amount method for limiting based on gamut area as described in claim 1, it is characterised in that: design
Calculating of the CMYRGB combined test mark version for gamut area in step 2 has been made to compare and analyze.
3. a kind of digit printing ink amount method for limiting based on gamut area as described in claim 1, it is characterised in that: step
The dot data in CMYRGB combined test mark version in 2 compares CMY single channel contrast ladder by calculating in step 1
What the size of the chromatic value combination of ruler obtained.
4. a kind of digit printing ink amount method for limiting based on gamut area as described in claim 1, it is characterised in that: use
Gamut area size is measured as objective judgment basis to determine that single channel maximum is black, which is in irregular hexagon, asks it
It can be calculated by being divided into four triangles when area or directly calculate acquisition, triangle by other mapping softwares
3 coordinates are respectively (x1, y1), (x2, y2), (x3, y3), and calculate triangle area by formula 2；
Formula 2:。
5. a kind of digit printing ink amount method for limiting based on gamut area as described in claim 1, it is characterised in that: process
When the middle acquisition color data using measuring device, the obtaining value method of mean value is taken after using multiple measurement to analyze rejecting abnormalities data.
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