CN115122793B - Scanning type printing measurement and control strip and manufacturing method thereof - Google Patents
Scanning type printing measurement and control strip and manufacturing method thereof Download PDFInfo
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- CN115122793B CN115122793B CN202210876811.2A CN202210876811A CN115122793B CN 115122793 B CN115122793 B CN 115122793B CN 202210876811 A CN202210876811 A CN 202210876811A CN 115122793 B CN115122793 B CN 115122793B
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- 238000005259 measurement Methods 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000003086 colorant Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000001228 spectrum Methods 0.000 claims abstract description 11
- 230000003595 spectral effect Effects 0.000 claims description 12
- 230000005855 radiation Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 230000004075 alteration Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F33/00—Indicating, counting, warning, control or safety devices
- B41F33/0036—Devices for scanning or checking the printed matter for quality control
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Abstract
The invention discloses a scanning type printing measurement and control strip and a manufacturing method thereof, wherein the method comprises the following steps: printing a basic color based on preset basic color data; measuring the spectrum of the printed basic color and calculating the characteristic data of the printed basic color; analyzing the calculated characteristic data of each basic color, confirming the characteristic data with the most obvious difference among the basic colors, and establishing a selection principle of adjacent color blocks of the measurement and control strip based on the characteristic data with the most obvious difference; and designing adjacent color block combination forms of the measurement and control strip by using the selection principle of the adjacent color blocks of the established measurement and control strip, and manufacturing the complete measurement and control strip according to the designed adjacent color block combination forms. The invention is designed based on the most obvious characteristic value of the difference in the basic color, the monitoring sensitivity of the measuring and control strip is improved to the maximum extent, the printing quality monitoring effect is improved correspondingly, and the possibility is provided for improving the printing quality.
Description
Technical Field
The invention belongs to the technical field of printing, and particularly relates to a scanning type printing measurement and control strip and a manufacturing method thereof.
Background
The automation process of the printing industry is undergoing unprecedented development, and as the degree of automation is higher and the product quality requirements are continuously improved, real-time and effective detection and judgment of the state of a printing machine and the quality of a printed product are required in the printing process.
At present, the quality of printed matters in the printing industry in China is more or judged and monitored by the personal experience of an experienced master, and the like, so that the printing quality is unstable.
The machine-identified measurement and control strip can be used for better realizing real-time monitoring of printing quality, including the thickness of an ink layer, gray balance conditions, dot gain problems, color overlapping effect accuracy, ink transfer rate and other problems, and can be used for realizing monitoring through the measurement and control strip. However, the current measurement and control strip has different design ideas, the obtained measurement and control strip has different effects, and meanwhile, the measurement and control strip has the problems of complex design and poor use effect.
Accordingly, the prior art is still further developed and improved.
Disclosure of Invention
Aiming at various defects in the prior art, in order to solve the problems, a scanning type printing measurement and control strip and a manufacturing method thereof are provided. The technical scheme of the invention is as follows:
a manufacturing method of a scanning type printing measurement and control strip comprises the following steps:
printing a basic color based on preset basic color data;
measuring the spectrum of the printed basic color and calculating the characteristic data of the printed basic color;
analyzing the calculated characteristic data of each basic color, confirming the characteristic data with the most obvious difference among the basic colors, and establishing a selection principle of adjacent color blocks of the measurement and control strip based on the characteristic data with the most obvious difference;
and designing adjacent color block combination forms of the measurement and control strip by using the selection principle of the adjacent color blocks of the established measurement and control strip, and manufacturing the complete measurement and control strip according to the designed adjacent color block combination forms.
The method for manufacturing the scanning type printing measurement and control strip comprises the steps of presetting CMYK solid, RGB solid, CMYK dots and CMY three-color gray balance.
The method for manufacturing the scanning type printing measurement and control strip comprises the steps of 5%,10%,20%,25%,30%,40%,50%,60%,70%,75%,80%,90% and 95% of CMYK dot values; the ash density was 10%,20%,25%,30%,40%,50%,60%,70%,75%,80%,90%.
The basic color characteristic data comprise chromaticity, chromaticity value, density value, XYZ tristimulus value, hue angle, chromatic aberration and chroma data.
The method for manufacturing the scanning type printing measurement and control strip comprises the steps of measuring a spectrum of a printed basic color and calculating characteristic data of the printed basic color, wherein the characteristic data specifically comprises:
the XYZ tristimulus values are calculated by the following calculation formula:
where E (λ) is the relative spectral power distribution of the illumination source, r (λ) is the object surface spectral reflectance/transmittance/radiation ratio,the spectrum tristimulus values of a standard observer are obtained, and K is an adjustment coefficient;
the chromaticity Lab is calculated by the following calculation formula:
L＝116(Y/Yn) 1/3 -16
a＝500[(X/Xn) 1/3 -(Y/Yn) 1/3 ]
b＝200[(Y/Yn) 1/3 -(Z/Zn) 1/3 ]
wherein X, Y, Z is the tristimulus value, X of the color sample n 、Y n 、z n Is the tristimulus value of the reference white point, L represents brightness, a, b represents psychological chromaticity, a is the red-green color quantity, and b is the yellow-blue color quantity;
the density is calculated using the following calculation formula:
wherein D is C 、D M 、D Y 、D K The density of the four channels of CMYK color is that the spectral reflection/transmission/radiation ratio of the surface of an R (lambda) object, and the spectral functional distribution of the color filters is R (lambda), G (lambda), B (lambda) and V (lambda);
the hue angle is calculated using the following calculation formula:
H＝arctan(b/a)，(b>0)；
H＝arctan(b/a)+180，(b<0)；
wherein H is a hue angle, a is a red-green color quantity, and b is a yellow-blue color quantity;
the color difference of the two colors is calculated by the following calculation formula:
△E＝((L 1 -L 2 )^2+(a 1 -a 2 )^2+(b 1 -b 2 )^2)^0.5
wherein DeltaE is chromatic aberration, L 1 、L 2 For the lightness of two colours, a 1 、a 2 Red-green color quantity, b, of two colors 1 、b 2 Yellow-blue color quantity for two colors;
the chroma is calculated by the following calculation formula:
M＝a^2+b^2
wherein M is chroma, a is red-green color quantity, and b is yellow-blue color quantity.
The method for manufacturing the scanning type printing measurement and control strip specifically comprises the following steps of establishing a selection principle of adjacent color blocks of the measurement and control strip based on characteristic data with the most obvious difference:
colors are classified by their chroma M, M < = 30 being low chroma, M >3000 being high chroma colors, adjacent colors of the low chroma colors having to be high chroma colors, and/or,
the hue angle difference of adjacent patch colors must be greater than 150 degrees and the delta E color difference greater than 30, and/or,
the difference between the main densities of adjacent color blocks is more than 0.5.
The method for manufacturing the scanning type printing measurement and control strip comprises the following steps of:
the first color selects 100% K with highest density, then according to the established adjacent color block selection principle, the adjacent colors are determined one by one according to the maximum difference method of the color features.
The scanning type printing measurement and control strip is manufactured according to the method.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for manufacturing a scanning type printing measurement and control strip, which is designed based on the color characteristic value with the most obvious difference in basic colors, can maximally improve the monitoring sensitivity of the measurement and control strip, correspondingly improve the printing quality monitoring effect, and provide possibility for improving the printing quality.
Drawings
FIG. 1 is a flowchart of a method for manufacturing a scanning type printing measurement and control bar in embodiment 1 of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the following description of the technical solution of the present invention will be made in detail by combining the embodiments of the present invention, and based on the embodiments in the present application, other similar embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present application. In addition, directional words such as "upper", "lower", "left", "right", and the like, as used in the following embodiments are merely directions with reference to the drawings, and thus, the directional words used are intended to illustrate, not to limit, the invention.
The method for manufacturing the scanning type printing measurement and control strip shown in fig. 1 comprises the following steps:
and S100, printing basic colors based on preset basic color data.
Specifically, the basic color data includes CMYK solid, RGB solid, CMYK halftone dots, CMY three-color gray balance, and the like. The basic color data is designed and confirmed in advance, and in a specific embodiment, the CMYK dot values are 5%,10%,20%,25%,30%,40%,50%,60%,70%,75%,80%,90% and 95%; the ash density was 10%,20%,25%,30%,40%,50%,60%,70%,75%,80%,90%.
And then selecting a printing material to print the basic color according to the set basic color data.
S200, measuring the spectrum of the printed basic color, and calculating the characteristic data of the printed basic color.
The printed base color spectrum was measured using a spectrophotometer. In a specific embodiment, the basic color characteristic data includes chromaticity value, density value, XYZ tristimulus value, hue angle, color difference and chroma data.
And measuring to obtain spectrum data, and calculating chromaticity and density values, XYZ values, hue angle, chromatic aberration and chroma data of corresponding basic colors by using the measured data. The specific method comprises the following steps:
the XYZ tristimulus values are calculated by the following calculation formula:
where E (λ) is the relative spectral power distribution of the illumination source, r (λ) is the object surface spectral reflectance/transmittance/radiation ratio,the spectrum tristimulus values of a standard observer are obtained, and K is an adjustment coefficient;
the chromaticity Lab is calculated by the following calculation formula:
L＝116(Y/Yn) 1/3 -16
a＝500[(X/Xn) 1/3 -(Y/Yn) 1/3 ]
b＝200[(Y/Yn) 1/3 -(Z/Zn) 1/3 ]
wherein X, Y, Z is the tristimulus value, X of the color sample n 、Y n 、z n Is the tristimulus value of the reference white point, L represents brightness, a, b represents psychological chromaticity, a is the red-green color quantity, and b is the yellow-blue color quantity;
the density is calculated using the following calculation formula:
wherein D is C 、D M 、D Y 、D K The density of the four channels of CMYK color is that the spectral reflection/transmission/radiation ratio of the surface of an R (lambda) object, and the spectral functional distribution of the color filters is R (lambda), G (lambda), B (lambda) and V (lambda);
the hue angle is calculated using the following calculation formula:
H＝arctan(b/a)，(b>0)；
H＝arctan(b/a)+180，(b<0)；
wherein H is a hue angle, a is a red-green color quantity, and b is a yellow-blue color quantity;
the color difference of the two colors is calculated by the following calculation formula:
△E＝((L 1 -L 2 )^2+(a 1 -a 2 )^2+(b 1 -b 2 )^2)^0.5
wherein DeltaE is chromatic aberration, L 1 、L 2 For the lightness of two colours, a 1 、a 2 Red-green color quantity, b, of two colors 1 、b 2 Is the amount of yellow-blue color of the two colors.
The chroma is calculated by the following calculation formula:
M＝a^2+b^2
wherein M is chroma, a is red-green color quantity, and b is yellow-blue color quantity.
And S300, analyzing the calculated characteristic data of each basic color, confirming the characteristic data with the most obvious difference among the basic colors, and establishing a selection principle of adjacent color blocks of the measurement and control strip based on the characteristic data with the most obvious difference.
Further, the chromaticity value, density value, XYZ value, hue angle data of each basic color are compared one by one, the difference size of each characteristic data of each basic color is calculated, and the characteristic data with the most obvious difference between each basic color is confirmed according to the calculated difference size of each characteristic data.
Specifically, the selection principle of establishing the adjacent color blocks of the measurement and control strip is mainly as follows:
principle one: the colors are classified according to their chroma M, M < = 30 is low chroma, M >3000 is high chroma, and the adjacent colors of the low chroma must be high chroma.
Principle two: the hue angle difference of the colors of adjacent color patches is greater than 150 degrees and the delta E color difference is greater than 30.
Principle three: the difference between the main densities of adjacent color blocks is more than 0.5.
S400, designing adjacent color block combination forms of the measurement and control strip by using the selection principle of the adjacent color blocks of the established measurement and control strip, and manufacturing the complete measurement and control strip according to the designed adjacent color block combination forms.
Specifically, the first color selects 100% K with the highest density, and then adjacent colors are determined one by one according to the color feature maximum difference method according to the adjacent color block selection principle. And further forming a complete test strip according to the printer ink zone data and the ink zone width.
In a specific embodiment, the invention also provides a scanning type printing measurement and control strip manufactured according to the method, the measurement and control strip is used for monitoring the printing quality in the printing process of the printed matter, and the problems of whether the thickness of an ink layer and the gray balance condition exist in the current printing, whether the dot gain, the color overlapping effect and the ink transfer rate are accurate can be checked in real time through scanning the measurement and control strip.
The invention provides a method for manufacturing a scanning type printing measurement and control strip, which is designed based on the color characteristic value with the most obvious difference in basic colors, can maximally improve the monitoring sensitivity of the measurement and control strip, correspondingly improve the printing quality monitoring effect, and provide possibility for improving the printing quality.
The foregoing detailed description of the invention has been presented for purposes of illustration and description, but is not intended to limit the scope of the invention, i.e., the invention is not limited to the details shown and described.
Claims (6)
1. The manufacturing method of the scanning type printing measurement and control strip is characterized by comprising the following steps of:
printing a basic color based on preset basic color data;
measuring the spectrum of the printed basic color and calculating the characteristic data of the printed basic color;
analyzing the calculated characteristic data of each basic color, confirming the characteristic data with the most obvious difference among the basic colors, and establishing a selection principle of adjacent color blocks of the measurement and control strip based on the characteristic data with the most obvious difference;
designing adjacent color block combination forms of the measurement and control strip by using the selection principle of the adjacent color blocks of the established measurement and control strip, and manufacturing a complete measurement and control strip according to the designed adjacent color block combination forms;
the characteristic data of the basic color comprises chromaticity value, density value, XYZ tristimulus value, hue angle, color difference and chroma data;
the spectrum of the printed basic color is measured, and the characteristic data of the printed basic color is calculated specifically as follows:
the XYZ tristimulus values are calculated by the following calculation formula:
where E (λ) is the relative spectral power distribution of the illumination source, r (λ) is the object surface spectral reflectance/transmittance/radiation ratio,the spectrum tristimulus values of a standard observer are obtained, and K is an adjustment coefficient;
the chromaticity Lab is calculated by the following calculation formula:
L＝116(Y/Yn) 1/3 -16
a＝500[(X/Xn) 1/3 -(Y/Yn) 1/3 ]
b＝200[(Y/Yn) 1/3 -(Z/Zn) 1/3 ]
wherein X, Y, Z is the tristimulus value, X of the color sample n 、Y n 、z n Is the tristimulus value of the reference white point, L represents brightness, a, b represents psychological chromaticity, a is the red-green color quantity, and b is the yellow-blue color quantity;
the density is calculated using the following calculation formula:
wherein D is C 、D M 、D Y 、D K The density of the CMYK four channels of the color is that R (lambda) is the spectral reflection/transmission/radiation ratio of the surface of an object, and R (lambda), G (lambda), B (lambda) and V (lambda) are the spectral functional distribution of the color filter;
the hue angle is calculated using the following calculation formula:
H＝arctan(b/a)，(b>0)；
H＝arctan(b/a)+180，(b<0)；
wherein H is a hue angle, a is a red-green color quantity, and b is a yellow-blue color quantity;
the color difference of the two colors is calculated by the following calculation formula:
△E＝((L 1 -L 2 )^2+(a 1 -a 2 )^2+(b 1 -b 2 )^2)^0.5；
wherein DeltaE is chromatic aberration, L 1 、L 2 For the lightness of two colours, a 1 、a 2 Red-green color quantity, b, of two colors 1 、b 2 Yellow-blue color quantity for two colors;
the chroma is calculated by the following calculation formula:
M＝a^2+b^2
wherein M is chroma, a is red-green color quantity, and b is yellow-blue color quantity.
2. The method of claim 1, wherein the pre-setting the basic color data comprises pre-setting a CMYK solid, RGB solid, CMYK halftone dot, and CMY tri-color gray balance.
3. The method for manufacturing the scanning type printing measurement and control strip according to claim 2, wherein the CMYK dots are 5%,10%,20%,25%,30%,40%,50%,60%,70%,75%,80%,90%,95%; the ash balance is 10%,20%,25%,30%,40%,50%,60%,70%,75%,80%,90%.
4. The method for manufacturing the scanning type printing measurement and control strip according to claim 1, wherein the selection principle of adjacent color blocks of the measurement and control strip is established based on the characteristic data with the most obvious difference, and the method specifically comprises the following steps:
colors are classified by their chroma M, M < = 30 being low chroma, M >3000 being high chroma colors, adjacent colors of the low chroma colors having to be high chroma colors, and/or,
the hue angle difference of adjacent patch colors must be greater than 150 degrees and the delta E color difference greater than 30, and/or,
the difference between the main densities of adjacent color blocks is more than 0.5.
5. The method for manufacturing the scanning type printing measurement and control strip according to claim 4, wherein the method for designing the adjacent color block combination form of the measurement and control strip by utilizing the selection principle of the adjacent color blocks of the established measurement and control strip is specifically as follows:
the first color selects 100% K with highest density, then according to the established adjacent color block selection principle, the adjacent colors are determined one by one according to the maximum difference method of the color features.
6. A scanning print measurement and control bar manufactured according to the method of any one of claims 1-5.
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|---|---|---|---|---|
| EP1275502A1 (en) * | 2001-07-12 | 2003-01-15 | Alcan Technology & Management AG | Control patches for multi-colour gravure printing |
| CN103978783A (en) * | 2014-05-31 | 2014-08-13 | 齐鲁工业大学 | Control method for static digital printing dot halftone |
| CN105787945A (en) * | 2016-03-09 | 2016-07-20 | 杭州万事利丝绸科技有限公司 | Evaluation method for digital printing color reproduction precision based on characteristic color |
| CN106541702A (en) * | 2016-10-27 | 2017-03-29 | 杭州电子科技大学 | A kind of printing quality corrects system and method |
| CN106671594A (en) * | 2016-12-29 | 2017-05-17 | 杭州豪波印务有限公司 | Method for determining printing three-primary color density |
| CN111806088A (en) * | 2020-06-30 | 2020-10-23 | 湖北合信智能包装科技有限公司 | Method for manufacturing flexible preprinting measurement and control strip of wide-width color corrugated carton and measurement and control strip |
-
2022
- 2022-07-25 CN CN202210876811.2A patent/CN115122793B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1275502A1 (en) * | 2001-07-12 | 2003-01-15 | Alcan Technology & Management AG | Control patches for multi-colour gravure printing |
| CN103978783A (en) * | 2014-05-31 | 2014-08-13 | 齐鲁工业大学 | Control method for static digital printing dot halftone |
| CN105787945A (en) * | 2016-03-09 | 2016-07-20 | 杭州万事利丝绸科技有限公司 | Evaluation method for digital printing color reproduction precision based on characteristic color |
| CN106541702A (en) * | 2016-10-27 | 2017-03-29 | 杭州电子科技大学 | A kind of printing quality corrects system and method |
| CN106671594A (en) * | 2016-12-29 | 2017-05-17 | 杭州豪波印务有限公司 | Method for determining printing three-primary color density |
| CN111806088A (en) * | 2020-06-30 | 2020-10-23 | 湖北合信智能包装科技有限公司 | Method for manufacturing flexible preprinting measurement and control strip of wide-width color corrugated carton and measurement and control strip |
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