CN109238982A - Determine the standard compliant method and apparatus of wrapping paper form and aspect - Google Patents
Determine the standard compliant method and apparatus of wrapping paper form and aspect Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3148—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using three or more wavelengths
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Abstract
The embodiment provides a kind of determining standard compliant method and apparatus of wrapping paper form and aspect, can be used for solving the problems, such as how judging two comparison tinctorial pattern form and aspect consistency.This method comprises: measuring the color value and spectral reflectivity of sample tinctorial pattern using wrapping paper as sample；Whether the spectral reflectivity curve of judgment criteria tinctorial pattern and the spectral reflectivity curve of sample tinctorial pattern coincide；The value of chromatism of sample tinctorial pattern and standard color sample is determined according to the color value of sample tinctorial pattern, and the value of chromatism accordance between standard color sample and sample tinctorial pattern is determined according to value of chromatism；If the value of chromatism of sample tinctorial pattern and standard color sample meets the requirements and the spectral reflectivity curve of sample tinctorial pattern and the spectral reflectivity curve of standard color sample are coincide, determine that the form and aspect of sample tinctorial pattern comply with standard.The corresponding numerical value of spectral reflectivity curve has been subjected to analytical calculation, and calculated result has been applied in the evaluation and judgement of form and aspect, so that the evaluation and control to form and aspect are more accurate.
Description
Technical field
The present invention relates to wrapping paper is determined in a kind of wrapping paper form and aspect detection technique more particularly to a kind of printing technology
The standard compliant method and apparatus of form and aspect.
Background technique
Packaging is the external manifestation of packaging product, will affect the desire to purchase of customer, and wrapping paper printing form and aspect are specific
The printing quality of packaging is embodied, will affect customer to the impression of the product.
The method of evaluation wrapping paper printing form and aspect is compared using by printed matter and standard sample at present, passes through subjectivity
Range estimation and value of chromatism Comprehensive Assessment.Visual assessment is based on the visual angle of people, different people, different light sources, different visual angle, no
Same place, obtained form and aspect determine that result is not quite similar, and there are biggish artificial subjective factors.
The evaluation of value of chromatism can only show the accordance of two tinctorial pattern values of chromatism, but cannot reflect seen by person two completely
Identical property, the consistency of a color.
Summary of the invention
The embodiment provides a kind of determining standard compliant method and apparatus of wrapping paper form and aspect, can be used for realizing
Two comparison tinctorial patterns can meet the accordance of value of chromatism, while can really reflect coincideing for two colors seen by person again
Property, i.e., for solving the problems, such as how to judge two comparison tinctorial pattern form and aspect consistency.
The embodiment provides a kind of determining standard compliant methods of wrapping paper form and aspect, comprising:
Using wrapping paper as sample, the color value and spectral reflectivity of sample tinctorial pattern are measured；
Draw the spectral reflectivity curve of standard color sample and the spectral reflectivity of sample tinctorial pattern respectively using wavelength as abscissa
Curve, and whether the spectral reflectivity curve of judgment criteria tinctorial pattern and the spectral reflectivity curve of sample tinctorial pattern coincide；
The value of chromatism △ E of sample tinctorial pattern and standard color sample is determined according to the color value of sample tinctorial pattern, and according to value of chromatism index
It is required that determining the value of chromatism accordance between standard color sample and sample tinctorial pattern；
If the color value of sample tinctorial pattern and the value of chromatism of standard color sample meet the requirements and the spectral reflectivity curve of standard color sample
It coincide with the spectral reflectivity curve of sample tinctorial pattern, then determines that wrapping paper form and aspect comply with standard.
Whether the spectral reflectivity curve of the step judgment criteria tinctorial pattern and the spectral reflectivity curve of sample tinctorial pattern kiss
Close includes that spectral reflectivity curve shape is identical and spectral reflectivity curve variation tendency is coincide.
Judge spectral reflectivity curve whether shape coincide include:
Judged according to crosspoint, i.e., the spectral reflectivity of the spectral reflectivity curve of judgment criteria tinctorial pattern and sample tinctorial pattern is bent
Whether the quantity in line crosspoint is less than or equal to curved intersection point threshold value；If so, the spectral reflectivity curve and sample of standard color sample
The spectral reflectivity curve shape of product tinctorial pattern is coincide；Or
According to angle judgement is handed over, i.e. the spectral reflectivity of the spectral reflectivity curve of judgment criteria tinctorial pattern and sample tinctorial pattern is bent
Whether the angle of straight line determined by the corresponding adjacent wavelength two o'clock of line is less than shape similarity threshold value, if so, standard color sample
Spectral reflectivity curve and sample tinctorial pattern spectral reflectivity curve shape coincide.
Before executing described the step of judging according to crosspoint, step is also executed:
Calculate the ratio R T between sample tinctorial pattern and the spectral reflectivity of standard color samplei(λ)/RSi(λ)；Wherein: RTi(λ)
For the spectral reflectivity of sample tinctorial pattern, RSi(λ) is the spectral reflectivity of standard color sample；As (RTi+10(λ)/RSi+10(λ)) > 1 and
(RTi(λ)/RSi(λ)) < 1 or (RTi+10(λ)/RSi+10(λ)) < 1 and (RTi(λ)/RSi(λ)) > 1 when, two curves have crosspoint,
In, i=400,410 ... 700, i is the integer of wavelength interval 10nm.
Before executing described the step of judging according to friendship angle, step is also executed:
The straight line L1 and sample tinctorial pattern spectrum for drawing adjacent wavelength two o'clock in standard color sample spectral reflectivity curve respectively are anti-
Penetrate the straight line L2 of adjacent wavelength two o'clock on rate curve；
Calculate the angle theta between straight line L1 and straight line L2.
Judge spectral reflectivity curve whether variation tendency coincide include:
The difference of the spectral reflectance values of standard color sample and the corresponding two neighboring wavelength points of sample tinctorial pattern is calculated divided by 10
Arc-tangent value: arctag ((Ri+10(λ)-Ri(λ))/10)；
As arctag ((RSi+10(λ)-RSi(λ))/10)×arctag((RTi+10(λ)-RTi(λ))/10) > 0 when, standard
The variation tendency of the spectral reflectivity curve of the spectral reflectivity curve and sample tinctorial pattern of tinctorial pattern is identical.
The embodiments of the present invention also provide a kind of determining standard compliant devices of wrapping paper form and aspect comprising:
Measuring unit measures the color value and spectral reflectivity of sample tinctorial pattern using wrapping paper as sample；
Spectral reflectivity curve judging unit draws the spectral reflectivity curve of standard color sample using wavelength as abscissa respectively
With the spectral reflectivity curve of sample tinctorial pattern, and the spectral reflectance of the spectral reflectivity curve of judgment criteria tinctorial pattern and sample tinctorial pattern
Whether rate curve coincide；
Value of chromatism judging unit calculates the color of sample tinctorial pattern and standard color sample according to the color value of sample tinctorial pattern and standard form and aspect
Poor △ E, and determine according to value of chromatism index request the value of chromatism accordance between standard color sample and sample tinctorial pattern；
Standard judging unit, if the color value of sample tinctorial pattern and the value of chromatism of standard color sample meet the requirements and standard color sample
Spectral reflectivity curve and the spectral reflectivity curve of sample tinctorial pattern are coincide, then determine that wrapping paper form and aspect comply with standard.
According to an embodiment of the invention, its technical effect is as follows: the present invention by the corresponding numerical value of spectral reflectivity curve into
It has gone analytical calculation, and the evaluation that calculated result is applied to form and aspect has been determined, calculated with spectral reflectivity curve numerical value
Quantitative analysis replaces subjective visual inspection and determines according to value of chromatism, so that the evaluation and control to form and aspect are more accurate.
Detailed description of the invention
Fig. 1 is the standard compliant method of determination wrapping paper form and aspect of the embodiment of the present invention；
Fig. 2 be the embodiment of the present invention one " two comparison tinctorial pattern values of chromatism meet, and the form and aspect that spectrum coincide unanimously are evaluated and sentenced
Situation calmly "；
Fig. 3 be the embodiment of the present invention two " two comparison tinctorial pattern values of chromatism meet, and the form and aspect that spectrum is misfitted are inconsistent to be commented
The situation of valence judgement "；
Fig. 4 be the embodiment of the present invention three " two comparison tinctorial pattern values of chromatism are not met, and the form and aspect that spectrum coincide inconsistent are commented
The situation of valence judgement "；
Fig. 5 be the embodiment of the present invention four " two comparison tinctorial pattern values of chromatism are not met, and the form and aspect that spectrum is misfitted are inconsistent
The situation of evaluation judgement "；
Fig. 6 shows the standard compliant device of determination wrapping paper form and aspect of the embodiment of the present invention.
Specific embodiment
The present invention is understood and realized for the ease of persons skilled in the art, describes implementation of the invention now in conjunction with attached drawing
Example.
Embodiment one
As shown in Figs. 1-5, the embodiment provides a kind of standard compliant method of determining wrapping paper form and aspect and dresses
It sets.In the method, using wrapping paper as sample tinctorial pattern, the color value and spectral reflectivity of sample tinctorial pattern are determined, it is anti-according to spectrum
It penetrates rate and draws spectral reflectivity curve, sample tinctorial pattern spectral reflectivity curve and standard color sample spectral reflectivity curve are carried out pair
Than determining the identical property of sample tinctorial pattern curve spectrum Yu standard color sample curve spectrum；According to the color of sample tinctorial pattern and standard form and aspect
Value calculates the color difference △ E of sample tinctorial pattern and standard color sample, determines that the value of chromatism of two tinctorial patterns meets according to value of chromatism index request
Property.If spectral reflectivity curve is coincide and value of chromatism meets, it is determined that wrapping paper form and aspect comply with standard, otherwise, it determines wrapping paper
Form and aspect are not inconsistent standardization.The determining standard compliant method of wrapping paper form and aspect is described below, method includes the following steps:
Step 1, gone out with spectrophotometer measurement standard color sample and sample tinctorial pattern color value (lightness L, color value a, color value b) and
Spectral reflectance values (Ri(λ), i=400,410 ... 700 (integers that i is wavelength interval 10nm)).The color value of standard color sample can
Measured in advance.Then the spectrum of the spectral reflectivity curve and sample tinctorial pattern of drawing standard color sample respectively using wavelength as abscissa is anti-
Penetrate rate curve.
Ratio R T between step 2, calculating sample tinctorial pattern and the spectral reflectivity of standard color samplei(λ)/RSi(λ).Wherein:
RTi(λ) is the spectral reflectivity of sample tinctorial pattern, RSi(λ) is the spectral reflectivity of standard color sample.
Step 3, the spectral reflectance values obtained according to step 1, calculate standard color sample and sample tinctorial pattern corresponding adjacent two
The difference of the spectral reflectance values of a wavelength points divided by 10 arc-tangent value: arctag ((Ri+10(λ)-Ri(λ))/10)。
Step 4, according to the spectral reflectivity curve of standard color sample and the spectral reflectivity curve of sample tinctorial pattern, calculate standard
The spectral reflectivity straight line L1 of two neighboring wavelength points in tinctorial pattern spectral reflectivity curve, and calculate sample tinctorial pattern spectral reflectivity
Then the spectral reflectivity straight line L2 of two neighboring wavelength points on curve calculates the angle between L1 and L2.
It includes that spectral reflectivity curve shape is identical and spectral reflectivity curve becomes that step 5, spectral reflectivity curve, which are coincide,
Change trend is coincide.
It coincide for spectral reflectivity curve shape, there are two types of calculation methods:
(1) (the RT being calculated according to step 2i(λ)/RSi(λ) calculates standard color sample and sample tinctorial pattern spectral reflectivity is bent
Line crosspoint quantity.Calculation method are as follows: (RTi+10(λ)/RSi+10(λ)) > 1 and (RTi(λ)/RSi(λ)) < 1 or (RTi+10(λ)/
RSi+10(λ)) < 1 and (RTi(λ)/RSi(λ)) > 1 when, two curves have crosspoint.The quantity in crosspoint indicates standard color sample and sample
Tinctorial pattern spectral reflectivity curve consistency is preferable.According to an embodiment of the invention, when spectral reflectivity curve crosspoint quantity≤
Curved intersection point threshold value, when such as curved intersection point threshold value=2, then criterion tinctorial pattern and sample tinctorial pattern spectral reflectivity curve shape
Shape coincide, otherwise it is assumed that standard color sample and sample tinctorial pattern spectral reflectivity curve shape misfit.
(2) included angle of straight line obtained using step 4, calculates standard color sample and sample tinctorial pattern spectral reflectivity curve shape is
It is no to coincide.Calculation method are as follows: included angle of straight line < shape similarity threshold value is then identical.Shape similarity threshold value compares color according to two
The empirical value that product is printed corresponding to sample determines, 1.5 °, 2 °, 2.5 ° of several ranks is generally set to, such as art post paperboard class printed matter
Shape similarity threshold value is 2 °.
Step 6 evaluates two comparison tinctorial pattern spectral reflectivity curves using the arc tangent series of values that step 3 is calculated
The variation tendency goodness of fit.That is, according to the series of values calculation method of step 3 are as follows: arctag ((RSi+10(λ)-RSi(λ))/10)×
arctag((RTi+10(λ)-RTi(λ))/10) > 0 it is identical).
Step 7, △ L, △ a, △ b, △ the E value for calculating standard color sample and sample tinctorial pattern.
△ L=L2-L1△ a=a2-a1△ b=b2-b1△ E=(△ L2+△a2+△b2)1/2。
Step 8, the identical property according to the curve of spectrum of step 5,6 criterion tinctorial patterns and sample tinctorial pattern.
(1) the identical property of any evaluation curve of spectrum shape of two methods of step 5 is utilized: that is, spectral reflectivity curve is handed over
Angle between crunode quantity≤crosspoint threshold value or standard color sample and corresponding two consecutive points of sample tinctorial pattern spectral reflectivity curve
Less than shape similarity threshold value.
(2) the identical property of step 6 evaluation curve of spectrum variation tendency.
(3) meeting (1) and (2) simultaneously, then criterion tinctorial pattern and sample tinctorial pattern spectral reflectivity curve are coincide, otherwise, mark
Quasi- tinctorial pattern and sample tinctorial pattern spectral reflectivity curve misfit.
Step 9 determines two comparison tinctorial pattern values of chromatism according to two comparison tinctorial pattern value of chromatism △ E and value of chromatism index request
Accordance.That is, indicating that value of chromatism meets the requirements, otherwise value of chromatism is not met when value of chromatism △ E is less than predetermined value
It is required that more particularly, for E≤2.5 transfer laser stationery product △；E≤2.0 other types product △.
Step 10, the value of chromatism of two comparison tinctorial patterns meet the requirements, and the curve of spectrum coincide, that is, can determine that two comparison tinctorial patterns
Form and aspect it is consistent.
The wrapping paper form and aspect detection method of the embodiment of the present invention is exemplified below:
First step, according to flow chart shown in FIG. 1, measure standard color sample and sample tinctorial pattern respectively with spectrophotometer
The color value (L, a, b) and spectral reflectance values (R of two comparison tinctorial patternsi(λ), i=400,410 ... 700 (i is wavelength interval
The integer of 10nm))
(1) standard color sample color value (L, a, b) and spectral reflectance values
(2) sample tinctorial pattern color value (Lab) and spectral reflectance values
The second step, (RT for calculating separately standard color sample and sample tinctorial patterni(λ)/RSi(λ)) series of values:
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | 99% | 99% | 98% | 98% | 97% | 96% | 96% | 96% | 96% | 96% |
| 500 | 97% | 97% | 97% | 96% | 96% | 96% | 96% | 95% | 95% | 96% |
| 600 | 96% | 96% | 97% | 97% | 97% | 97% | 97% | 97% | 97% | 97% |
| 700 | 97% | — | — | — | — | — | — | — | — | — |
Third step, two comparison tinctorial pattern ((Ri+10(λ)-Ri(λ))/10 arc tangent series of values:
(1) standard color sample series of values
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | — | 12.3 | 9.8 | 3.2 | 0.4 | 0.6 | 3.6 | 6.6 | 9.4 | 9.2 |
| 500 | 7.7 | 7.3 | 4.4 | 2.8 | 0.0 | -2.9 | 4.0 | 14.3 | 26.0 | 28.0 |
| 600 | 13.8 | 4.4 | 4.6 | 4.6 | 3.7 | 2.0 | -1.7 | -4.3 | -4.2 | -2.6 |
| 700 | -1.0 | — | — | — | — | — | — | — | — | — |
(2) sample tinctorial pattern series of values
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | — | 11.8 | 8.7 | 2.0 | -0.9 | -0.3 | 2.9 | 6.0 | 9.3 | 9.6 |
| 500 | 1.103 | 8.1 | 7.4 | 3.8 | 1.9 | -0.3 | -2.9 | 3.0 | 12.7 | 25.1 |
| 600 | 3.334 | 14.5 | 5.2 | 5.3 | 5.0 | 4.0 | 2.2 | -1.7 | -4.5 | -4.5 |
| 700 | -0.196 | -1.3 | — | — | — | — | — | — | — | — |
Four steps, two comparison the corresponding two o'clock of tinctorial pattern Ri+10(λ)、RiThe included angle of straight line series of values of (λ):
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | — | 0.5 | 1.1 | 1.2 | 1.3 | 0.9 | 0.7 | 0.6 | 0.1 | 0.4 |
| 500 | 0.4 | 0.1 | 0.6 | 0.9 | 0.3 | 0.0 | 1.0 | 1.6 | 0.9 | 0.1 |
| 600 | 0.7 | 0.8 | 0.7 | 0.4 | 0.3 | 0.2 | 0.0 | 0.2 | 0.3 | 0.4 |
| 700 | 0.3 | — | — | — | — | — | — | — | — | — |
5th step, two comparison tinctorial pattern curved intersection point quantity
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | — | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 500 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 600 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 700 | 0 | — | — | — | — | — | — | — | — | — |
6th step, two comparison tinctorial pattern spectral reflectivity curve shape goodnesses of fit:
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | — | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide |
| 500 | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide |
| 600 | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide |
| 700 | It coincide | — | — | — | — | — | — | — | — | — |
7th step, two comparison tinctorial pattern spectral reflectivity curve variation tendency goodnesses of fit:
| 0 | 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 400 | — | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide |
| 500 | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide |
| 600 | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide | It coincide |
| 700 | It coincide | — | — | — | — | — | — | — | — | — |
8th step, two comparison tinctorial pattern △ L, △ a, △ b, △ E value.
9th step, the identical property that the tinctorial pattern curve of spectrum is compared according to step 5,6,7 data judging two.See Fig. 2.
Tenth step requires to determine two comparison tinctorial pattern values of chromatism according to two comparison tinctorial pattern value of chromatism △ E and value of chromatism
Accordance.
11st step, the value of chromatism of two comparison tinctorial patterns meet the requirements, and the curve of spectrum coincide, that is, can determine that two comparisons
The form and aspect of tinctorial pattern are consistent.See Fig. 2.
Embodiment two
Present embodiment illustrates " value of chromatism of two comparison tinctorial patterns meets the requirements, and the curve of spectrum is misfitted, that is, can determine that two
It is a comparison tinctorial pattern form and aspect it is inconsistent " situation, see Fig. 3.Determine the step of wrapping paper form and aspect comply with standard referring to embodiment one.
Embodiment three
Present embodiment illustrates " value of chromatism of two comparison tinctorial patterns is undesirable, and the curve of spectrum coincide, that is, can determine that two
It is a comparison tinctorial pattern form and aspect it is inconsistent " situation, see Fig. 4.Determine the step of wrapping paper form and aspect comply with standard referring to embodiment one.
Example IV
Present embodiment illustrates " value of chromatism of two comparison tinctorial patterns is undesirable, and the curve of spectrum is misfitted, that is, can determine that
Two comparison tinctorial patterns form and aspect it is inconsistent " situation, see Fig. 5.Determine the step of wrapping paper form and aspect comply with standard referring to embodiment
One.
Embodiment five
As shown in fig. 6, the embodiments of the present invention also provide a kind of determining standard compliant device of wrapping paper form and aspect, packet
It includes:
Measuring unit measures the color value and spectral reflectivity of sample tinctorial pattern using wrapping paper as sample；
Spectral reflectivity curve judging unit draws the spectral reflectivity curve of standard color sample using wavelength as abscissa respectively
With the spectral reflectivity curve of sample tinctorial pattern, and the spectral reflectance of the spectral reflectivity curve of judgment criteria tinctorial pattern and sample tinctorial pattern
Whether rate curve coincide；
Value of chromatism judging unit determines the value of chromatism △ E of sample tinctorial pattern and standard color sample according to the color value of sample tinctorial pattern, and
The color value value accordance between standard color sample and sample tinctorial pattern is determined according to value of chromatism △ E；
Standard judging unit, if the color value of sample tinctorial pattern and the value of chromatism of standard color sample meet the requirements and standard color sample
Spectral reflectivity curve and the spectral reflectivity curve of sample tinctorial pattern are coincide, then determine that wrapping paper form and aspect comply with standard.
The concrete methods of realizing of above-described embodiment is referring to content described in embodiment 1.
Although depicting the present invention by embodiment, it will be appreciated by the skilled addressee that of the invention not departing from
In the case where spirit and essence, so that it may make the present invention there are many deformation and variation, the scope of the present invention is by the attached claims
To limit.
Claims (7)
1. a kind of determining standard compliant method of wrapping paper form and aspect characterized by comprising
Using wrapping paper as sample, the color value and spectral reflectivity of sample tinctorial pattern are measured；
Draw the spectral reflectivity curve of standard color sample and the spectral reflectivity curve of sample tinctorial pattern respectively using wavelength as abscissa,
And whether the spectral reflectivity curve of judgment criteria tinctorial pattern and the spectral reflectivity curve of sample tinctorial pattern coincide；
The value of chromatism △ E of sample tinctorial pattern and standard color sample is determined according to the color value of sample tinctorial pattern, and according to value of chromatism index request
Determine the accordance of value of chromatism between standard color sample and sample tinctorial pattern；
If the color value of sample tinctorial pattern and the value of chromatism of standard color sample meet the requirements and the spectral reflectivity curve and sample of standard color sample
The spectral reflectivity curve of product tinctorial pattern is coincide, then determines that wrapping paper form and aspect comply with standard.
2. the determining standard compliant method of wrapping paper form and aspect according to claim 1, which is characterized in that the step judgement
It includes spectral reflectivity curve that whether the spectral reflectivity curve of standard color sample and the spectral reflectivity curve of sample tinctorial pattern, which coincide,
Shape is coincide and spectral reflectivity curve variation tendency is coincide.
3. the determining standard compliant method of wrapping paper form and aspect according to claim 2, which is characterized in that judge spectral reflectance
Rate curve whether coincide by shape, comprising:
Judged according to crosspoint, i.e., the spectral reflectivity curve of judgment criteria tinctorial pattern and the spectral reflectivity curve of sample tinctorial pattern are handed over
Whether the quantity of crunode is less than or equal to curved intersection point threshold value；If so, the spectral reflectivity curve and sample color of standard color sample
The spectral reflectivity curve shape of sample is coincide；Or
Judged according to angle, i.e., the spectral reflectivity curve of judgment criteria tinctorial pattern and the spectral reflectivity curve of sample tinctorial pattern are corresponding
Adjacent wavelength two o'clock determined by angle between straight line whether be less than shape similarity threshold value, if so, standard color sample
Spectral reflectivity curve and the spectral reflectivity curve shape of sample tinctorial pattern are coincide.
4. the determining standard compliant method of wrapping paper form and aspect according to claim 3, which is characterized in that executing described
Before the step of judging according to crosspoint, step is also executed:
Calculate the ratio R T between sample tinctorial pattern and the spectral reflectivity of standard color samplei(λ)/RSi(λ)；Wherein: RTi(λ) is sample
The spectral reflectivity of product tinctorial pattern, RSi(λ) is the spectral reflectivity of standard color sample；As (RTi+10(λ)/RSi+10(λ)) > 1 and (RTi
(λ)/RSi(λ)) < 1 or (RTi+10(λ)/RSi+10(λ)) < 1 and (RTi(λ)/RSi(λ)) > 1 when, two curves have crosspoint, wherein i
=400,410 ... 700, i are the integer of wavelength interval 10nm.
5. the determining standard compliant method of wrapping paper form and aspect according to claim 3, which is characterized in that executing described
Before the step of handing over angle to judge, step is also executed:
The straight line L1 and sample tinctorial pattern spectral reflectivity of adjacent wavelength two o'clock in standard color sample spectral reflectivity curve are drawn respectively
The straight line L2 of adjacent wavelength two o'clock on curve；
Calculate the included angle of straight line θ between straight line L1 and straight line L2.
6. the determining standard compliant method of wrapping paper form and aspect according to claim 2, which is characterized in that judge spectral reflectance
Rate curve whether variation tendency coincide include:
The differences of the spectral reflectance values of standard color sample and the corresponding two neighboring wavelength points of sample tinctorial pattern is calculated divided by 10 anyway
Cut value: arctag ((Ri+10(λ)-Ri(λ))/10)；
As arctag ((RSi+10(λ)-RSi(λ))/10)×arctag((RTi+10(λ)-RTi(λ))/10) > 0 when, standard color sample
The variation tendency of spectral reflectivity curve and the spectral reflectivity curve of sample tinctorial pattern is identical.
7. a kind of determining standard compliant device of wrapping paper form and aspect characterized by comprising
Measuring unit measures the color value and spectral reflectivity of sample tinctorial pattern using wrapping paper as sample；
Spectral reflectivity curve judging unit draws the spectral reflectivity curve and sample of standard color sample using wavelength as abscissa respectively
The spectral reflectivity curve of product tinctorial pattern, and the spectral reflectivity of the spectral reflectivity curve of judgment criteria tinctorial pattern and sample tinctorial pattern is bent
Whether line coincide；
Value of chromatism judging unit calculates the value of chromatism of sample tinctorial pattern and standard color sample according to the color value of sample tinctorial pattern and standard color sample
△ E, and determine according to the index request of value of chromatism the value of chromatism accordance between standard color sample and sample tinctorial pattern；
Standard judging unit, if the value of chromatism of sample tinctorial pattern and standard color sample meets the requirements and the spectral reflectivity of standard color sample
The spectral reflectivity curve of curve and sample tinctorial pattern is coincide, then determines that wrapping paper form and aspect comply with standard.
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Application publication date: 20190118 |