CN113096196A - Method for constructing color system of colored woven fabric - Google Patents
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- CN113096196A CN113096196A CN202110292529.5A CN202110292529A CN113096196A CN 113096196 A CN113096196 A CN 113096196A CN 202110292529 A CN202110292529 A CN 202110292529A CN 113096196 A CN113096196 A CN 113096196A
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Abstract
The invention discloses a method for constructing a color system of colored woven fabric, which comprises the following steps: the method comprises the steps of obtaining initial color data and a production process color difference threshold value, carrying out small color difference sample removal processing on the initial color data, searching a three-dimensional boundary aiming at the color data after the small color difference sample is removed to obtain value ranges of L, a and B values, utilizing the production process color difference threshold value to evenly divide the color data respectively to obtain matrixes LL, A and B, carrying out full-arrangement combination on the data in the three matrixes to obtain evenly divided color data, screening color points positioned in a color solid aiming at all the color data obtained by even division to obtain a color data set of a colored woven fabric color system, arranging the color data of the color system according to visual perception characteristics, carrying out proofing preparation and binding of an entity color sample to form a book, and completing construction of the colored woven fabric color system. The method is beneficial to improving the color communication efficiency of the whole industrial chain, reducing the communication cost and promoting the transformation and upgrading of the Chinese textile industry.
Description
Technical Field
The invention belongs to the technical field of production and application of textile industry, and particularly relates to a method for constructing a color system of yarn-dyed fabric.
Background
In the field of textile industry production, a digital color system is constructed, a basic color card of a full color gamut is developed, and scientific management of color is formed. For a long time, various industry practice uses foreign color standards as references, such as the common international color standards: PANTONE color, PCCS color, NCS color, MUNSELL color, etc., however none of these color standards relate to how color is specifically implemented on textiles. Under the global marketization competitive environment, the local productivity of most textile enterprises is excessive, the innovation capability of small and medium-sized enterprises is not strong, and the root cause is the lack of independent innovation theory, method and technology for constructing a product color system. In contrast to foreign color standards, domestic color application systems need to grow.
At present, color cards used in the industry are mainly classified into two types: one type is a color perception system based on visual experiments, and the color cards are ordered according to the equal interval rule of color vision, are convenient to search and convenient for a designer to select colors, but do not care about whether and how the colors can be realized; one type is a color mixture system based on a color mixing experiment, and the color card relates to colors capable of being realized in production and reference formulas for realizing the colors and is used for guiding actual production, but the color arrangement is random, the regularity and the scientificity are lacked, and the color searching and the color selecting are inconvenient. Some enterprises with larger scale in China choose to use color standards accumulated by the enterprises and corresponding standard books, such as Bailong color cards, Huafu color cards and the like, but the arrangement modes of the color cards and the common colors of the enterprises are not consistent, so that designers are inconvenient to use, the color digital communication between the enterprises is difficult, and the color gamut range of the color cards is smaller than that of MuNSELL colors and NCS colors. Further modifications and improvements are therefore desirable.
At present, the real object color management is too complicated and inefficient, a large amount of real object color data are stored in part of enterprises for color comparison, when new color development is carried out, a new color formula is still determined by a method of analyzing an incoming sample and repeatedly printing a small sample, and the situation that the color development is directly carried out again by neglecting the produced color may occur. The digital color system is beneficial to color management of the textile and clothing industry chain, can promote color development and innovation of enterprises, is more convenient for communication between customers and enterprises in commercial delivery and promotes scientific and digital management of color formation of the enterprises.
For the current situation and the problems, the invention provides a color system construction method of yarn-dyed fabrics, which can realize the rapid reaction and scientific management of the development of various yarn-dyed products, is beneficial to improving the color communication efficiency of the whole industrial chain, reducing the communication cost and promoting the transformation and upgrading of the Chinese textile industry.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a color system construction method of colored woven fabric. The method is characterized in that the method can realize rapid reaction and scientific management of development of various yarn-dyed products, is beneficial to improving the color communication efficiency of the whole industrial chain, reducing the communication cost and promoting transformation and upgrading of the Chinese textile industry. The method comprises the following steps:
step 1, obtaining initial color data and a production process color difference threshold;
step 2, carrying out small color difference sample removal processing on the initial color data;
step 3, searching a three-dimensional boundary aiming at the color data after the small color difference sample is removed to obtain the value ranges of the L, a and b values;
step 4, aiming at the value ranges of the L value, the a value and the B value, utilizing a color difference threshold value of a production process to uniformly divide the values respectively to obtain matrixes LL, A and B, and performing full permutation and combination on data in the three matrixes to obtain uniformly divided color data;
step 5, screening color points positioned in a color solid aiming at all color data obtained by uniform division, namely a color data set of a color system of the colored woven fabric, wherein the color solid is formed by the color data obtained by removing the small color difference sample in the step 2;
step 6, arranging color data of the color system according to the visual perception characteristic;
and 7, carrying out proofing preparation and binding of the entity color sample into a book to complete construction of the color system of the colored woven fabric.
It should be noted that, in the present invention, the small color difference sample removal, the three-dimensional boundary search, the uniform division, and the color data screening are all performed in the CIELab color space, and the saturation comparison of the color data and the arrangement of the color data of the color system are all performed in the CIELCh space.
It should be noted that, in step 1, the initial color data includes M hues of most saturated color data and N neutral gray scale color data that can be produced by the enterprise, where the gray scale color data should include the brightest and darkest color data, and the production process color difference threshold Δ E is the maximum dyeing deviation value of a certain target color in the yarn dyeing process, and can be obtained through statistical analysis of historical data of the enterprise.
In step 2, the color difference calculation of the sample uses a CMC (2:1) color difference formula, as shown in formula one; the method for removing the small chromatic aberration sample comprises the following steps: and calculating the color difference value of two adjacent color data in the input color data, if the color difference value between two colors is larger than a color difference threshold delta E, keeping the two color data, otherwise, keeping a group of data with higher saturation in the two color data, and deleting a group of data with lower saturation.
Wherein, Δ L, Δ Cab、ΔHabRespectively representing lightness difference, saturation difference and chromatic aberration of the sample; sl、Sc、 SHWeighting coefficients of lightness difference, saturation difference and hue difference respectively; l and c are two coefficients that adjust the relative wide capacity of lightness and saturation, respectively. When color difference evaluation is carried out in the textile industry, l: c is generally 2: 1.
It should be noted that, in step 3, for the color data after the small color difference sample is removed, a three-dimensional boundary is found, which specifically includes the following steps: and (4) solving the maximum value and the minimum value of L, a and b by using the color data obtained after the small color difference sample is removed, and obtaining the value ranges of the L, the a and the b.
It should be noted that, in step 4, the value ranges of the L, a, and b values are respectively and uniformly divided, and the specific method is as follows: and aiming at the value ranges of the L value, the a value and the B value, setting a color difference threshold value of the production process as a division interval, uniformly dividing the value ranges of the L value, the a value and the B value respectively to obtain matrixes LL, A value and B value, performing full permutation and combination on the data of the matrix A and the matrix B to obtain a matrix K, and performing full permutation and combination on the matrix K and the data of the matrix LL to obtain all uniformly divided color data.
It should be noted that, in step 5, for all the color data obtained by uniform division, color points located inside the color cube are screened, and the specific method is as follows: firstly, calculating the color solid volume of the color data after the small color difference sample is removed in the step 2, screening all the color data obtained by uniform division point by point, comparing the volume with the color solid volume, and judging whether the point is inside.
It should be noted that, in step 6, the specific method for arranging the color data of the color system according to the visual perception characteristic is that, in the CIELCh color space, a stable color data set is first equally divided into m hue ranges according to hue h, and since the value range of hue h is [ 0-360 ° ], the step length Δ h divided into m hue ranges is as shown in formula two,
dividing the hue step length to obtain color data in each hue range; then, for the color data in each hue range, the color data is divided into n brightness levels, and then the step length Δ L divided into n brightness ranges is represented by formula three, where L ismaxAnd LminThe distribution represents the maximum and minimum lightness values in the color data set,
dividing the color data according to the lightness step length to obtain color data in each lightness range; and finally, sorting the color data in each lightness range in each hue range from small to large according to the saturation C value, and finishing the color system color data arrangement according to the visual perception characteristic. Wherein, the value of m is usually not less than 40, and the value of n is usually not less than 10.
It should be noted that, in step 7, after the sample preparation of the colored woven fabric entity color sample is completed, in order to facilitate reading and exchanging, the entity color sample needs to be bound into a book according to the color arrangement method, and in order to facilitate guiding the actual production, relevant information such as dyeing formula parameters of each entity color sample needs to be recorded.
The method takes the most saturated color and the neutral gray scale color of each color phase as initial data, takes a color difference threshold value of a production process as a constraint condition, screens color data points positioned in a color solid by utilizing a uniform division method and through a condition that the volume of the color solid is not changed into a judgment condition, realizes the initial acquisition of a color data set of a color system of the colored woven fabric, then arranges the colors of the color data set according to visual perception characteristics, and finally obtains a complete set of color system of the colored woven fabric through the proofing preparation and the volume of an entity color sample, thereby being beneficial to improving the color communication efficiency of the whole industrial chain, reducing the communication cost, promoting the transformation and upgrading of the Chinese textile industry and providing a standard and effective color system construction method of the colored woven fabric for enterprises. The technical scheme of the invention has important application prospect and value, and the protection of the technical scheme of the invention has important significance for the international leading position competition of related industries in China.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Fig. 2 provides initial colored woven fabric color data for enterprise a.
Fig. 3 is a color solid distribution after the removal of a small color difference sample.
Fig. 4 shows all color data obtained by uniform division.
FIG. 5 is a filtered color data set of a color system.
Detailed Description
As shown in fig. 1, the embodiment provides a method for constructing a color system of a yarn-dyed fabric, which is beneficial to improving the color communication efficiency of the whole industrial chain, reducing the communication cost, and promoting the transformation and upgrading of the textile industry of china. In the embodiment, the most saturated color data of 98 hues and the color data of 15 neutral gray scale provided by an enterprise a are used as initial color data, the distribution of the initial color data in a CIELab color space is shown in fig. 2, the color difference threshold Δ E of the production process of the enterprise is 2.0, and the method is explained by using a MATLAB software platform under the condition that the color data and the color difference threshold are limited. The embodiments of the present invention may be implemented using data and computer software technology by those skilled in the art. The following provides a detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings.
The embodiment mainly comprises the following steps:
(1) obtaining initial color data and a production process color difference threshold;
as described above, in the embodiment, the most saturated color data of 98 hues and the color data of 15 neutral gray scale provided by the enterprise a are adopted to obtain 113 initial color data, the color difference threshold Δ E of the yarn dyeing production process of the enterprise a is 2.0, and the input data configuration of the method of the present invention is complete.
(2) Carrying out small color difference sample removal processing on the initial color data;
in the embodiment, the color difference calculation of the sample uses a CMC (2:1) color difference formula as shown in formula one; the method for removing the small chromatic aberration sample comprises the following steps: and calculating the color difference value of two adjacent color data in the input color data, if the color difference value between two colors is larger than a color difference threshold delta E, keeping the two color data, otherwise, keeping a group of data with higher saturation in the two color data, and deleting a group of data with lower saturation.
Wherein, Δ L, Δ Cab、ΔHabRespectively representing lightness difference, saturation difference and chromatic aberration of the sample; sl、Sc、SHWeighting coefficients of lightness difference, saturation difference and hue difference respectively; l and c are two coefficients that adjust the relative wide capacity of lightness and saturation, respectively. When color difference evaluation is carried out in the textile industry, l: c is generally 2: 1.
(3) Searching a three-dimensional boundary aiming at the color data of the removed small color difference sample to obtain the value ranges of the L, a and b values;
in the embodiment, for color data after removing a small color difference sample, a three-dimensional boundary is found, and the specific method is as follows: and (4) solving the maximum value and the minimum value of L, a and b by using the color data obtained after the small color difference sample is removed, and obtaining the value ranges of the L, the a and the b.
(4) Aiming at the value ranges of the L value, the a value and the B value, the color difference threshold value of the production process is utilized to respectively and uniformly divide the values to obtain matrixes LL, A and B, and the data in the three matrixes are fully arranged and combined to obtain uniformly divided color data;
in the embodiment, the value ranges of the L, a, and b values are respectively and uniformly divided, and the specific method is as follows: and aiming at the value ranges of the L value, the a value and the B value, setting a color difference threshold value of the production process as a division interval, uniformly dividing the value ranges of the L value, the a value and the B value respectively to obtain matrixes LL, A value and B value, performing full permutation and combination on the data of the matrix A and the matrix B to obtain a matrix K, and performing full permutation and combination on the matrix K and the data of the matrix LL to obtain all uniformly divided color data.
(5) Screening color points positioned in the color solid according to all color data obtained by uniform division, namely a color data set of a color system of the colored woven fabric;
in the embodiment, for all color data obtained by uniform division, color points located inside a color solid are screened, and the specific method is as follows: firstly, calculating the color solid volume of the color data after the small color difference sample is removed in the step 2, screening all the color data obtained by uniform division point by point, comparing the volume with the color solid volume, and judging whether the point is inside.
(6) Arranging color data of a color system according to visual perception characteristics;
in the embodiment, the specific method for arranging the color data of the primary color system according to the visual perception characteristic is that, in the CIELCh color space, the primary color data set is firstly equally divided into m hue ranges according to hue h, and since the value range of the hue h is [ 0-360 ° ], the step length Δ h divided into the m hue ranges is as shown in formula two,
dividing the hue step length to obtain color data in each hue range; then, for the color data in each hue range, dividing the color data according to n brightness levels, and then dividing the step length Δ L into n brightness ranges as shown in formula three, wherein, Lmax and Lmin distribution represent the maximum brightness and the minimum brightness value in the color data set,
dividing the color data according to the lightness step length to obtain color data in each lightness range; and finally, sorting the color data in each lightness range in each hue range from small to large according to the saturation C value, and finishing the color data arrangement of the primary color system according to the visual perception characteristic. Wherein, the value of m is usually not less than 40, and the value of n is usually not less than 10.
(7) And (5) carrying out proofing preparation and binding of the entity color sample into a book, and completing construction of the color system of the colored woven fabric.
In the embodiment, according to the color data of the primary color system, the textile enterprises finish the proofing preparation of the color samples of the colored woven fabric entity. In addition, after the sample preparation of the colored woven fabric entity color sample is completed, in order to facilitate the reading and exchange, the entity color sample needs to be bound into a book according to the color arrangement method, and in order to facilitate the guidance of the actual production, relevant information such as dyeing formula parameters of each entity color sample needs to be recorded.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A color system construction method of colored woven fabric is characterized by comprising the following steps:
step 1, obtaining initial color data and a production process color difference threshold;
step 2, carrying out small color difference sample removal processing on the initial color data;
step 3, searching a three-dimensional boundary aiming at the color data after the small color difference sample is removed to obtain the value ranges of the L, a and b values;
step 4, aiming at the value ranges of the L value, the a value and the B value, utilizing a color difference threshold value of a production process to uniformly divide the values respectively to obtain matrixes LL, A and B, and performing full permutation and combination on data in the three matrixes to obtain uniformly divided color data;
step 5, aiming at the color data obtained by uniform division, screening color points positioned in a color solid, namely a color data set of a color system of the colored woven fabric, wherein the color solid is formed by the color data obtained by removing the small color difference sample in the step 2;
step 6, arranging color data of the color system according to the visual perception characteristic;
and 7, carrying out proofing preparation and binding of the entity color sample into a book to complete construction of the color system of the colored woven fabric.
2. The method for constructing a color system of colored woven fabric according to claim 1, wherein: the small color difference sample removal, the three-dimensional boundary searching, the uniform division and the color data screening are all executed in a CIELab color space, and the arrangement of color data of a color system is executed in a CIELCh space.
3. The method for constructing a color system of colored woven fabric according to claim 1, wherein: in step 1, the initial color data includes M hue most saturated color data and N neutral gray scale color data that can be produced by an enterprise, where the gray scale color data should include the brightest and darkest color data, and the production process color difference threshold Δ E is the maximum dyeing deviation value of a certain target color in the yarn dyeing process, and is obtained by statistical analysis of historical data of the enterprise.
4. The method for constructing a color system of colored woven fabric according to claim 3, wherein: in the step 2, a CMC (2:1) color difference formula is used for calculating the color difference of the sample, and the formula is shown as a formula I;
wherein, Δ L, Δ Cab、ΔHabRespectively representing lightness difference, saturation difference and chromatic aberration of the sample; sl、Sc、SHWeighting coefficients of lightness difference, saturation difference and hue difference respectively; l and c are two coefficients for adjusting the relative width capacity of lightness and saturation, respectively;
the method for removing the small chromatic aberration sample comprises the following steps: and calculating the color difference value of two adjacent color data in the input color data, if the color difference value between two colors is larger than a color difference threshold delta E, keeping the two color data, otherwise, keeping a group of data with higher saturation in the two color data, and deleting a group of data with lower saturation.
5. The method for constructing a color system of colored woven fabric according to claim 4, wherein: the saturation comparison of the color data is performed in the CIELCh space.
6. The method for constructing a color system of colored woven fabric according to claim 1, wherein: in step 3, for the color data after the small color difference sample is removed, a three-dimensional boundary is searched, and the specific method is as follows: and (4) solving the maximum value and the minimum value of L, a and b by using the color data obtained after the small color difference sample is removed, and obtaining the value ranges of the L, the a and the b.
7. The method for constructing the primary color system of the spun-dyed yarn according to claim 1, wherein the method comprises the following steps: in step 4, the value ranges of the L, a and b values are uniformly divided, and the specific method is as follows: and aiming at the value ranges of the L value, the a value and the B value, setting a color difference threshold value of the production process as a division interval, uniformly dividing the value ranges of the L value, the a value and the B value respectively to obtain matrixes LL, A value and B value, performing full permutation and combination on the data of the matrix A and the matrix B to obtain a matrix K, and performing full permutation and combination on the matrix K and the data of the matrix LL to obtain all uniformly divided color data.
8. The method for constructing the primary color system of the spun-dyed yarn according to claim 1, wherein the method comprises the following steps: in step 6, the specific method for arranging the color data of the color system according to the visual perception characteristic is that, in the CIELCh color space, a stable color data set is firstly equally divided into m hue ranges according to hue h, and as the value range of the hue h is [ 0-360 DEG ], the step length delta h divided into the m hue ranges is as shown in formula two,
dividing the hue step length to obtain color data in each hue range; then, for the color data in each hue range, the color data is divided into n brightness levels, and then the step length Δ L divided into n brightness ranges is represented by formula three, where L ismaxAnd LminThe distribution represents the maximum and minimum lightness values in the color data set,
dividing the color data according to the lightness step length to obtain color data in each lightness range; and finally, sorting the color data in each lightness range in each hue range from small to large according to the saturation C value, and finishing the color system color data arrangement according to the visual perception characteristic.
9. The method for constructing a primary color system of spun-dyed yarn according to claim 8, wherein the method comprises the following steps: the value of m is not less than 40, and the value of n is not less than 10.
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