A computer colour matching method for a bath dyeing process

Abstract

The application discloses a computer color matching method for one-bath dyeing of blended fabrics, which can avoid color matching difference, improve color matching accuracy, solve color bleeding and mutual influence between dyes in the dyeing process of the blended fabrics, reduce human and material resource consumption, and has wide application conditions, wide adaptability and strong practicability. The technical scheme is as follows: the blended color matching model for one-bath dyeing is established, color matching difference caused by different dyeing methods is avoided, and the accuracy of color matching results is improved; the blended color matching model also solves the problems of color bleeding and mutual influence between dyes in the dyeing process of the blended fabrics, has wide applicability without the need of establishing a color bleeding database; and a corresponding blended color correction method is established according to the color matching results, and the practicability is stronger in actual production.

Description

Technical Field

[0001] This invention relates to a computer color matching method, specifically a computer color matching method for blended fabrics using a one-bath dyeing process. Background Technology

[0002] In recent years, with the rapid development of the economy, consumer demand has become increasingly diversified. Multicomponent fiber textiles (commonly known as blended textiles) are favored by consumers because they can combine the advantages of multiple fibers, improve performance, and enhance the appearance and quality of textiles. Among them, bicomponent fiber textiles are the most popular.

[0003] Compared to single-component fiber products, blended fabrics, due to the combination of multiple fibers with varying structures and properties, undergo more complex dyeing processes. When dyeing blended fabrics, it's crucial to achieve the same hue, depth, and saturation across the different components of the blend. Furthermore, different fibers can transfer color between each other, and different dyes can influence each other during application. Therefore, blended fabric dyeing is not only more prone to uneven dyeing, color spots, and uneven color quality issues, but also more complex when using computer color matching due to the need to consider multiple factors. Currently, there are two main types of blended fabric dyeing methods: one-bath and two-bath. The one-bath method dyes two fibers in the same bath, suitable for light and medium colors, and is convenient to operate, but the colorfastness of the sample is relatively poor. The two-bath method dyes different fibers sequentially in two separate baths, suitable for dark and intense colors, but takes longer, yet offers better colorfastness. The two methods also differ in computer color matching. The one-bath method requires determining the dyeing formula for both fibers simultaneously, while the two-bath method allows determining the dyeing formula for one fiber first, and then determining the formula for the other fiber.

[0004] However, while there is considerable research and widespread application of computer-aided formulation for single-component fiber textiles both domestically and internationally, research on blended fabrics is scarce, and there is a lack of categorized studies focusing on two different dyeing methods. Existing research primarily aims to improve color matching by adding staining databases, as exemplified by the paper "Practice to Improve the Accuracy of Computer Color Matching for Polyester-Cotton Blended Fabrics" (Dyeing and Printing, Yu Chunhua, Zhang Weiliang, 2018, NO.4, Vol.14: 201-206). Taking polyester-cotton blended fabrics as an example, the addition of a staining database improves the color matching results. However, establishing a staining database requires extensive experimentation, and its application is subject to stringent conditions. Even slight changes in process conditions, fabric structure, or fiber specifications can significantly reduce the effectiveness of the staining database, limiting its practical application and increasing costs. Summary of the Invention

[0005] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0006] The purpose of this invention is to solve the above-mentioned problems and provide a computer-aided color matching method for blended fabrics in one-bath dyeing. This method can avoid color matching differences caused by different dyeing methods, improve the accuracy of color matching results, solve the problems of staining and mutual influence between dyes during the dyeing process of blended fabrics, avoid the loss of manpower and material resources caused by a large number of experiments, and has relaxed application conditions, wide adaptability, and strong practicality.

[0007] The technical solution of this invention is as follows: This invention discloses a computer color matching method for blended fabrics using a one-bath dyeing method, the method comprising:

[0008] Step 1: Based on different concentration levels, use the first and second single-component fibers in the blended blank fabric as the base material, dye it with the corresponding dye, and obtain the corresponding single-component basic color sample and reflectance value.

[0009] Step 2: Obtain the color difference threshold (ΔE) for standard blended fabrics. S Based on the reflectance value, and using a blank fabric containing 100% of the first single-component fiber as the substrate, the initial concentration of dye required for the first single-component fiber was calculated. in: Indicates: Formula i In the diagram, dye n corresponds to the concentration.

[0010] Step 3: Calculate the initial concentration value of formula A obtained in step 2. i Color difference value (ΔE) between the corresponding color and the standard blended fabric color. ai And make a judgment:

[0011] If (ΔE) ai ≤(ΔE) s Then A j =A i Proceed directly to step 4;

[0012] If (ΔE) ai >(ΔE) s Then, the corrected concentration formula A is obtained through the correction formula. j And by determining (ΔE) aj With (ΔE) SThe relationship is repeatedly iterated and corrected, and iterative corrections are performed during the process, checking whether the correction results converge. If convergence is achieved, the iteration continues until (ΔE) is satisfied. aj ≤(ΔE) s If it does not converge, then take (ΔE). aj The corrected concentration formulation corresponding to the minimum value;

[0013] Step 4: Using a blank fabric containing 100% second-component fibers as the substrate, calculate the initial dye concentration required for the second-component fibers. in: Indicates: Formula B i In the diagram, dye n corresponds to the concentration.

[0014] Step 5: Calculate the initial concentration value of Formula B i Color difference value (ΔE) between the corresponding color and the standard blended fabric color. bi And make a judgment:

[0015] If (ΔE) bi ≤(ΔE) s Then B j =B i Proceed directly to step 6;

[0016] If (ΔE) bi >(ΔE) s Then, the corrected concentration formula B is obtained through the correction formula. j And by determining (ΔE) bj With (ΔE) S The relationship is repeatedly iterated and corrected, and iterative corrections are performed during the process, checking whether the correction results converge. If convergence is achieved, the iteration continues until (ΔE) is satisfied. aj ≤(ΔE) s If it does not converge, then take (ΔE). aj The corrected concentration formulation corresponding to the minimum value;

[0017] Step 6: Follow formula A j B j The blended blank fabric and blank fabrics containing 100% of the first and second single-component fibers a and b in corresponding proportions by weight were dyed in the same bath to obtain the blended color sample M and the first and second single-component color samples A and B.

[0018] Step 7: Measure the reflectance values ​​of the blended color sample M and the first and second single-component color samples A and B from Step 6, and calculate the color difference (ΔE) between the corresponding colors of color samples M, A, and B and the standard blended fabric color. m (ΔE) am (ΔE) bm And make a judgment:

[0019] If (ΔE) m≤(ΔE) s If the color matching is successful, then formula A is correct. j B j This is the desired color scheme result;

[0020] If (ΔE) m >(ΔE) S If so, proceed to step 8 for color correction;

[0021] Step 8: Based on the reflectance value of the blended color sample M, follow steps 2 to 5 to obtain formula A. k B k Then, based on (ΔE) m (ΔE) am (ΔE) bm Different color correction formulas are used for different situations to obtain color correction formula A. l B l Repeat steps 6 through 8 until (ΔE) is reached. m ≤(ΔE) S Then the color correction is complete, formula A. l B l This is the desired color scheme.

[0022] According to an embodiment of the computer color matching method for one-bath dyeing of blended fabrics of the present invention, in step 1, the concentration range of the dye used is 0-10%, the concentration levels are divided into 10-20, and the types of dyes include: reactive dyes, disperse dyes, and acid dyes; the first and second single-component fibers in the blended blank fabric include any two of cotton, polyester, nylon, wool, and spandex.

[0023] According to an embodiment of the computer color matching method for one-bath dyeing blended fabrics of the present invention, in step 2, the initial concentration value of the dye required for the first single-component fiber is formulated as A. i The calculation formula is as follows:

[0024] A i =[(K a ) T UTK a ] -1 (K a ) T UT[F s -F at ]×w a

[0025] Among them, A i For: the initial concentration formulation of the first single-component fiber a;

[0026] U represents the weighting coefficient at different wavelengths;

[0027] T represents the rate at which the color reflectance value of a standard blended fabric changes with the K / S value.

[0028] K a Here is: the unit concentration K / S value of the dye required for the first single-component fiber a;

[0029] F s Here, K / S value corresponds to the color of a standard blended fabric.

[0030] F at The K / S value is: the blank fabric of 100% first single-component fiber a;

[0031] w a The content of the first single component fiber a in the blended blank fabric.

[0032] According to an embodiment of the computer color matching method for one-bath dyeing blended fabrics of the present invention, in step 3, the corrected concentration formula A is calculated. j The corrected formula is as follows:

[0033] A j =A i +Q a ×[R s -R ai ]

[0034] Among them, A j For: the corrected concentration formulation of the first single-component fiber a;

[0035] Q a This refers to the change in dye concentration corresponding to the first single-component fiber a when the reflectance undergoes a slight change.

[0036] R s For: the reflectance value of the standard blended fabric color;

[0037] R ai Formula A i The reflectance value corresponding to the color.

[0038] According to an embodiment of the computer-aided color matching method for blended fabrics using a one-bath dyeing method of the present invention, in step 4, the calculation formula for the initial concentration value of the dye required for the second single-component fiber is as follows:

[0039] B i =[(K b ) T UTK b ] -1 (K b ) T UT[F s -w a ×F aj +wa ×F at -F st ]×1 / 1-w a

[0040] Among them, B i For: the initial concentration formulation of the second single-component fiber b;

[0041] U represents the weighting coefficient at different wavelengths;

[0042] T represents the rate at which the color reflectance value of a standard blended fabric changes with the K / S value.

[0043] K b Here is: the unit concentration K / S value of the dye required for the second single-component fiber b;

[0044] F s For: the K / S value corresponding to the color of standard blended fabrics;

[0045] F aj Formula A j The K / S value corresponding to the fabric color;

[0046] w a The content of the first single-component fiber a in a blended blank fabric;

[0047] F at The K / S value is: the blank fabric of 100% first single-component fiber a;

[0048] F st For: blank blended fabric, that is, the K / S value of blank fabric of standard blended fabric.

[0049] According to an embodiment of the computer color matching method for blended fabrics using a one-bath dyeing process based on the present invention, the conversion formula between color reflectance value and K / S value is as follows:

[0050]

[0051] Where F represents the K / S value under the main light source, and R represents the reflectivity value under the main light source.

[0052] According to an embodiment of the computer color matching method for blended fabrics using a one-bath dyeing method of the present invention, in step 5, the correction formula for calculating the correction concentration formulation is as follows:

[0053] B j =B i +Q b ×[R s -W a ×R aj -(1-w a )×R bi]

[0054] Among them, B j For: the corrected concentration formulation of the second monocomponent fiber b;

[0055] Q b This refers to the change in dye concentration corresponding to a slight change in reflectivity in the second single-component fiber b.

[0056] R s For: the reflectance value of the standard blended fabric color;

[0057] R aj Formula A j The reflectance value corresponding to the color;

[0058] w a The content of the first single-component fiber a in a blended blank fabric;

[0059] R bi For: Formula B i The reflectance value corresponding to the color.

[0060] According to an embodiment of the computer color matching method for blended fabrics in one-bath dyeing according to the present invention, the color difference value type is one of CIELAB, CMC(l:c), and CIEDE2000.

[0061] According to one embodiment of the computer color matching method for one-bath dyeing blended fabrics of the present invention, in step 8, based on (ΔE) m (ΔE) am (ΔE) bm Different color correction formulas are used for different situations, as follows:

[0062] Case 1: (ΔE) m >(ΔE) s , and (ΔE) am >(ΔE) s ,(ΔE) bm ≤(ΔE) s hour:

[0063]

[0064] Among them: A l B l These are color-correcting formulas;

[0065] Formula A j A k The concentration corresponding to dye n in the middle;

[0066] Case 2: (ΔE) m >(ΔE)s , and (ΔE) am ≤(ΔE) s ,(ΔE) bm >(ΔE) S Time: A l =A j ;

[0067]

[0068] Among them: A l B l These are color-correcting formulas;

[0069] Formula B j B k The concentration corresponding to dye n in the middle;

[0070] U represents the weighting coefficient at different wavelengths;

[0071] T represents the rate at which the color reflectance value of a standard blended fabric changes with the K / S value.

[0072] K b Here is: the K / S value of the dye concentration required for single-component fiber b;

[0073] F ak Formula A k The K / S value corresponding to the fabric color;

[0074] F aj For: Formula w j The K / S value corresponding to the fabric color;

[0075] w a The content of single-component fiber a in a blended blank fabric;

[0076] Case 3: (ΔE) m >(ΔE) S , and (ΔE) am >(ΔE) s ,(ΔE) bm >(ΔE) S hour:

[0077]

[0078]

[0079] Among them: A l B l These are color-correcting formulas;

[0080] F al Formula Al The K / S value corresponding to the fabric color;

[0081] Case 4: (ΔE) m >(ΔE) s , and (ΔE) am ≤(ΔE) s ,(ΔE) bm ≤(ΔE) s hour:

[0082] If (ΔE) am ≤(ΔE) bm The color correction formula is the same as in case 2;

[0083] If (ΔE) am >(ΔE) bm The color correction formula is the same as in case 1.

[0084] Compared with existing technologies, this invention has the following advantages: The blended color matching model established by this invention for the one-bath dyeing method avoids color matching differences caused by different dyeing methods and improves the accuracy of color matching results; by establishing a blended color matching model, the problems of staining and mutual influence between dyes in the dyeing process of blended fabrics are solved, eliminating the need to establish a staining database, avoiding the loss of manpower and material resources caused by a large number of experiments, and having relaxed application conditions and wide applicability; in addition, a corresponding blended color correction method is established for the color matching results, which is more practical in actual production applications. Attached Figure Description

[0085] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0086] Figure 1 A flowchart of an embodiment of the computer color matching method for one-bath dyeing blended fabrics of the present invention is shown. Detailed Implementation

[0087] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0088] Figure 1 A flowchart illustrating an embodiment of the computer-aided color matching method for one-bath dyeing blended fabrics of the present invention is shown. Please refer to... Figure 1 The implementation steps of the method in this embodiment are described in detail below.

[0089] Step S1: Based on different concentration levels, use single-component blank fabrics made from single-component fibers a and b in the blended blank fabric as the base material, dye them with the corresponding dyes, and obtain the corresponding single-component basic color samples and reflectance values.

[0090] In this step, the concentration range of the dye product is 0-10%, and the concentration levels can be divided into 10-20 grades.

[0091] In this step, the types of dye products include: reactive dyes, disperse dyes, and acid dyes.

[0092] In this step, the single-component fibers in the blended blank fabric include any two of the following: cotton, polyester, nylon, wool, and spandex;

[0093] In one example, assuming the blended blank fabric contains 60% single-component fiber a and 40% single-component fiber b, blank fabrics made of 100% single-component fiber a and 100% single-component fiber b respectively are dyed according to different concentration levels to obtain single-component basic color samples and obtain the corresponding reflectance values.

[0094] Step S2: Obtain the color difference threshold (ΔE) of the standard blended fabric. S And the reflectance value, using a blank fabric of 100% single-component fiber a as the substrate, the initial concentration value of the dye required for single-component fiber a is calculated by formula. in: Indicates: Formula A i In the diagram, dye n corresponds to the concentration.

[0095] In this embodiment, the formula for calculating the initial concentration value is as follows:

[0096] A i =[(K a ) T UTK a ] -1 ×(K a ) T UT[F s -F at ]×w a

[0097] Among them, A i For: the initial concentration formulation of single-component fiber a;

[0098] U represents the weighting coefficient at different wavelengths;

[0099] T represents the rate at which the color reflectance value of a standard blended fabric changes with the K / S value.

[0100] K aHere: The unit concentration K / S value of the dye required for single-component fiber a;

[0101] F s Here, K / S value corresponds to the color of a standard blended fabric.

[0102] F at K / S value: K / S value of blank fabric of 100% single component fiber a;

[0103] w a The content of single-component fiber a in a blended blank fabric.

[0104] In this embodiment, the conversion formula between the reflectance value and the K / S value is as follows:

[0105]

[0106] Where F represents the K / S value under the main light source, and R represents the reflectivity value under the main light source.

[0107] In this embodiment, formula A i The number of dyes contained is 1 to 8, more preferably 2 to 4.

[0108] Here's an explanation of the difference between the blank blended fabric in step 1 and the standard blended fabric in step 2.

[0109] Standard blended fabrics usually refer to colored blended fabrics delivered by customers, while blank blended fabrics refer to fabric samples that are the same as standard blended fabrics, but undyed and white. In fact, the only difference between the two is whether they are colored (or dyed). The customer's goal is to dye the blank blended fabrics into standard blended fabrics, which requires finding a dyeing formula that can achieve this goal.

[0110] Under normal circumstances, what the industry calls "blank" means that it has not been dyed (white), which is an industry consensus.

[0111] Step S3: Calculate the initial concentration value of formula A obtained in step S2. i Color difference value (ΔE) between the corresponding color and the standard blended fabric color. ai And make a judgment:

[0112] If (ΔE) ai ≤(ΔE) s Then A j =A i Proceed directly to step S4;

[0113] If (ΔE) ai >(ΔE) s Then, the corrected concentration formula A is obtained through the correction formula. jAnd by determining (ΔE) aj With (ΔE) s The relationship is repeatedly iterated and corrected, and iterative corrections are performed during the process, checking whether the correction results converge. If convergence is achieved, the iteration continues until (ΔE) is satisfied. aj ≤(ΔE) s If it does not converge, then take (ΔE). aj The corrected concentration formulation corresponding to the minimum value.

[0114] In this embodiment, the corrected concentration formulation A is calculated. j The corrected formula is as follows:

[0115] A j =A i +Q a ×[R s -R ai ]

[0116] Among them, A j For: the corrected concentration formulation of single-component fiber a;

[0117] Q a This refers to the change in dye concentration in fiber a when the reflectance undergoes a slight change.

[0118] R s For: the reflectance value of the standard blended fabric color;

[0119] R ai Formula A i The reflectance value corresponding to the color.

[0120] In this embodiment, the color difference value type is one of CIELAB, CMC(l:c), or CIEDE2000.

[0121] Step S4: Using a blank fabric of 100% single-component fiber b as the substrate, calculate the initial concentration of dye required for single-component fiber b using a formula. in: Indicates: Formula B i In the diagram, dye n corresponds to the concentration.

[0122] In this embodiment, the initial concentration value of single-component fiber b is calculated using the following formula:

[0123] B i =[(K b ) T UTK b ] -1 ×(K b ) T UT[F s -w a ×F aj +wa ×F at -F st ]×1 / 1-w a

[0124] Among them, B i For: the initial concentration formulation of single-component fiber b;

[0125] U represents the weighting coefficient at different wavelengths;

[0126] T represents the rate at which the color reflectance value of a standard blended fabric changes with the K / S value.

[0127] K b Here is: the K / S value of the dye concentration required for single-component fiber b;

[0128] F s Here, K / S value corresponds to the color of a standard blended fabric.

[0129] F aj Formula A j The K / S value corresponding to the fabric color;

[0130] w a The content of single-component fiber a in a blended blank fabric;

[0131] F at K / S value: K / S value of blank fabric of 100% single component fiber a;

[0132] F st For: blank blended fabric, that is, the K / S value of blank fabric of standard blended fabric.

[0133] In this embodiment, the conversion formula between the reflectance value and the K / S value is as follows:

[0134]

[0135] Where F represents the K / S value under the main light source, and R represents the reflectivity value under the main light source.

[0136] In this embodiment, formula B i The number of dyes contained is 1 to 8, more preferably 2 to 4.

[0137] Step S5: Calculate the initial concentration value of formulation B i Color difference value (ΔE) between the corresponding color and the standard blended fabric color. bi And make a judgment:

[0138] If (ΔE) bi ≤(ΔE) s Then B j =B iProceed directly to step S6;

[0139] If (ΔE) bi >(ΔE) s Then, the corrected concentration formula B is obtained through the correction formula. j And by determining (ΔE) bj With (ΔE) S The relationship is repeatedly iterated and corrected, and iterative corrections are performed during the process, checking whether the correction results converge. If convergence is achieved, the iteration continues until (ΔE) is satisfied. aj ≤(ΔE) s If it does not converge, then take (ΔE). aj The corrected concentration formulation corresponding to the minimum value.

[0140] In this embodiment, the correction formula for calculating the correction concentration is as follows:

[0141] B j =B i +Q b ×[R s -w a ×R aj -(1-w a )×R bi ]

[0142] Among them, B j For: the corrected concentration formulation of single-component fiber b;

[0143] Q b This refers to the change in dye concentration corresponding to fiber b when the reflectance undergoes a slight change.

[0144] R s For: the reflectance value of the standard blended fabric color;

[0145] R aj Formula A j The reflectance value corresponding to the color;

[0146] w a The content of single-component fiber a in a blended blank fabric;

[0147] R bi For: Formula B i The reflectance value corresponding to the color.

[0148] In this embodiment, the color difference value type is the same as in step S3.

[0149] Step S6: According to formula A j B j The blended blank fabric and the blank fabric of 100% single component a and b of corresponding proportions by weight are dyed in the same bath to obtain the blended color sample M and the single component color samples A and B.

[0150] In this embodiment, the amount of blank fabric used (in grams) is: blended: X, 100% single component a: 0.1X×w a 100% single component b: 0.1X×(1-w) a ); where: w a The content of single-component fiber a in a blended blank fabric;

[0151] The amount of dye used (in grams) is: 1.1X × A j ; 1.1X×B j .

[0152] Step S7: Measure the reflectance values ​​of the blended color sample M and the single-component color samples A and B from step S6, and calculate the color difference (ΔE) between the corresponding colors of color samples M, A, and B and the standard blended fabric color. m ,

[0153] (ΔE) am (ΔE) bm And make a judgment:

[0154] If (ΔE) m ≤(ΔE) S If the color matching is successful, then formula A is correct. j B j This is the desired color scheme result;

[0155] If (ΔE) m >(ΔE) s Then you need to proceed to step S8 to perform color correction.

[0156] Step S8: Based on the reflectance value of the blended color sample M, proceed with steps S2 to S5 to obtain formula A. k B k Then, based on (ΔE) m (ΔE) am (ΔE) bm Different color correction formulas are used for different situations to obtain color correction formula A. l B l Repeat steps S6 to S8 until (ΔE) is reached. m ≤(ΔE) s Then the color correction is complete, formula A. l B l This is the desired color scheme.

[0157] In step S8, according to (ΔE) m (ΔE) am (ΔE) bm Different color correction formulas are used for different situations, as follows:

[0158] Case 1: (ΔE) m >ΔE) S , and (ΔE) am >ΔE) S ,(ΔE) bm ≤(ΔE) S hour:

[0159]

[0160] Among them: A l B l These are color-correcting formulas;

[0161] Formula A j A k The concentration corresponding to dye n in the middle

[0162] Case 2: (ΔE) , >(ΔE) s , and (ΔE) am ≤ΔE) s ,(ΔE) bm >(ΔE) s hour:

[0163] A l =A j ;

[0164]

[0165] Among them: A l B l These are color-correcting formulas;

[0166] Formula B j B k The concentration corresponding to dye n in the middle;

[0167] U represents the weighting coefficient at different wavelengths;

[0168] T represents the rate at which the color reflectance value of a standard blended fabric changes with the K / S value.

[0169] K b Here is: the K / S value of the dye concentration required for single-component fiber b;

[0170] F ak Formula A k The K / S value corresponding to the fabric color;

[0171] F aj Formula A j The K / S value corresponding to the fabric color;

[0172] w a The content of single-component fiber a in a blended blank fabric;

[0173] Case 3: (ΔE) m >(ΔE) S , and (ΔE) am >(ΔE) s ,(ΔE) bm >(ΔE) s hour:

[0174]

[0175]

[0176] Among them: A l B l These are color-correcting formulas;

[0177] F al Formula A l The K / S value corresponding to the fabric color;

[0178] For the remaining meanings, please refer to cases 1 and 2;

[0179] Case 4: (ΔE) m >(ΔE) s , and (ΔE) am ≤(ΔE) S ,(ΔE) bm ≤(ΔE) s hour:

[0180] If (ΔE) am ≤(ΔE) bm The color correction formula is the same as in case 2;

[0181] If (ΔE) am >(ΔE) bm The color correction formula is the same as in case 1.

[0182] Although the methods described above are illustrated and depicted as a series of actions for the sake of simplicity, it should be understood and appreciated that these methods are not limited by the order of the actions, as some actions may occur in a different order and / or concurrently with other actions from the illustrations and descriptions herein or not illustrated and described herein but which may be understood by those skilled in the art, according to one or more embodiments.

[0183] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps are described above in a generalized manner in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in different ways for each specific application, but such implementation decisions should not be construed as departing from the scope of the invention.

[0184] The various illustrative logic blocks, modules, and circuits described in conjunction with the embodiments disclosed herein can be implemented or performed using a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, it may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration.

[0185] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor such that the processor can read and write information to / from the storage medium. In an alternative, the storage medium may be integrated into the processor. The processor and storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and storage medium may reside as discrete components in the user terminal.

[0186] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functionality may be stored or transmitted as one or more instructions or code on or through a computer-readable medium. A computer-readable medium includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium accessible to a computer. By way of example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a computer. Any connection is also legitimately referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of a medium. As used in this article, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs. Disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of these should also be included within the scope of computer-readable media.

[0187] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A computer colour matching method for a bath dyeing process blend fabric, characterised in that, The method comprises: Step 1: according to different concentration levels, respectively using the first single-component fiber and the second single-component fiber in the blended blank fabric as the base material, dyeing with corresponding dyes to obtain corresponding single-component basic color samples and reflectivity values; Step 2: Obtain the color difference threshold (△E) of the standard blended fabric s and reflectance values, taking the blank fabric of the first single component fiber as the base material, to calculate the initial concentration value formula of the dye required by the first single component fiber Wherein: Indicates: formula A i In which dye n corresponds to the concentration; Step 3: Calculate the initial concentration value of the formula A obtained in Step 2 i Color difference value (ΔE) of the corresponding color and the standard blended fabric color ai , and make a judgment: if (△E) ai ≤ (△E) S then A j = A i , go directly to step 4; If (△E) ai >(△E) S , the corrected concentration formula A is obtained by the correction formula j , and the repeated iterative correction is carried out by judging the relationship between (△E) aj and (△E) s , during which it is judged whether the correction result converges or not, if it converges, the iteration is carried out until (△E) aj ≤(△E) S ; if it does not converge, the corrected concentration formula corresponding to the minimum value of (△E) aj is taken. Step 4: Calculate the initial concentration value of the dye required for the second monocomponent fiber based on the blank fabric of the second monocomponent fiber at 100% wherein: represents: Formula B i wherein dye n corresponds to the concentration; Step 5: Calculate initial concentration value Recipe B i Corresponding color and standard blended fabric color color difference value (ΔΕ) bi And make a decision: if (△E) bi ≤ (△E) S then B j = B i , go directly to step 6; If (ΔE) bi >(ΔE) S , then the corrected concentration formula B is obtained by the correction formula j , and the repeated iterative correction is carried out by judging the relationship between (ΔE) bj and (ΔE) s , during which it is judged whether the correction result converges or not, if it converges, then it is iterated until (ΔE) aj ≤(ΔE) S ; if it does not converge, then the corrected concentration formula corresponding to the minimum (ΔE) aj is taken. Step 6: According to Formula A j , B j The blended blank fabric, the blank fabrics of 100% of the first and second single-component fibers a, b corresponding to the proportional weight, are dyed in the same bath to obtain the blended color sample M, the first and second single-component color samples A, B; Step 7: The reflectance values of the blended color sample M, the first and second single component color samples A, B in step 6 are measured respectively, and the color difference values (△E) of the corresponding colors of the color samples M, A, B and the standard blended fabric color are calculated m , (△E) am , (△E) bm , and the following is determined: If (ΔE) m ≤ (ΔE) S , then the color matching is successful, and the formula A j , B j is the desired color matching result; If (△E) m >(△E) S then go to step 8 and retouch. Step 8: According to the reflectance value of the blended color sample M, the formula A is obtained according to steps 2-5 k , B k , and then according to different cases of (△E) m , (△E) am , (△E) bm , different color correction formulas are used to obtain the color correction formula A l , B l , steps 6-8 are repeated until (△E) m ≤(△E) S , then the color correction is completed, and the formula A l , B l is the required color matching result.

2. A computer colour matching method for a bath dyeing process of a blended fabric according to claim 1, wherein In step 1, the concentration range of the dye used is 0-10%, the concentration level is divided into 10-20, and the type of the dye includes one of reactive dyes, disperse dyes and acid dyes; the first single-component fiber and the second single-component fiber in the blended blank fabric include any two of cotton, polyester, nylon, wool and spandex.

3. A computer colour matching method for a bath dyeing process of a blended fabric according to claim 1, wherein The initial concentration value of the dye required for the first single component fibre in step 2 is given by the formula A i The formula for calculating A is as follows: A i = [(K a ) T UTK a ] -1 ×(K a ) T UT[F s -F at ]×w a wherein A i is: the initial concentration recipe of the first single component fiber a; U is: the weight coefficient at different wavelengths; T is: the rate of change of the color reflectivity value of the standard blended fabric with the K / S value; K a K / S value of the unit concentration of the dye required for the first single-component fiber a; F s F is the K / S value corresponding to the standard blend fabric color; F at K / S = 100% of the K / S value of the blank fabric of the first single-component fibers a; % is: the content of the first single-component fiber a in the blended blank fabric.

4. The computer color matching method for a bath dyeing process of a blended fabric according to claim 1, wherein In Step 3, the modified concentration formula A of Step 2 is calculated j The modified formula is as follows: A j = A i + Q a x [R s - R ai ] wherein A j is: the corrected concentration recipe of the first single-component fiber a; Q a is: the change in the dye concentration of the first single-component fiber a corresponding to the slight change in the reflectivity; R s is: the reflectance value of the standard blended fabric color; R ai For: Formula A i Reflectance values for the corresponding colors.

5. The computer color matching method for a bath dyeing process of a blended fabric according to claim 1, wherein In step 4, the calculation formula of the initial concentration value formula of the dye required by the second single-component fiber is as follows: B i = [(K b ) T UTK b ] -1 × (K b ) T UT[F s -w a × F aj +w a × F at -F st ] x 1 / 1-w a wherein B i is: the initial concentration recipe of the second single component fibers b; U is: the weight coefficient at different wavelengths; T is: the rate of change of the color reflectivity value of the standard blended fabric with the K / S value; K b K / S value of the unit concentration of the dye required for the second single-component fiber b: F s K / S = K / S of standard blend fabric color F aj For: Formula A j K / S value corresponding to the color of the fabric; w a is: the content of the first single-component fiber a in the blended fabric; F at K / S = 100% first single component fiber a blank fabric value; F st K / S value of the blank fabric of the standard blend fabric, i.e. the blend blank fabric.

6. A computer colour matching method for a bath dyeing process of a blended fabric according to claim 3 or 5, wherein The conversion formula of the color reflectivity value and the K / S value is as follows: Wherein, F represents the K / S value under the main light source, and R represents the reflectivity value under the main light source.

7. The computer color matching method for a bath dyeing process of a blended fabric according to claim 1, wherein In step 5, the correction formula of the correction concentration formula is as follows: B j = B i + Q b x [R s - w a x R aj - (1 - w a ) x R bi ] wherein B j is: the corrected concentration recipe of the second single-component fibers b; Q b is: when the reflectivity produces a small change, the second single-component fiber b corresponds to the change in the dye concentration produced by it; R s is: the reflectance value of the standard blended fabric color; R aj is: Recipe A j corresponding color reflectance values; w a is: the content of the first single-component fiber a in the blended fabric; R bi For: Formula B i Reflectance values for the corresponding colors.

8. A computer colour matching method for a bath dyeing process of a blended fabric according to claim 4 or 7, wherein The color difference value type is one of CIELAB, CMC(1:c) and CIEDE2000.

9. The computer color matching method for a bath dyeing process of a blended fabric according to claim 1, wherein, In step 8, different color correction formulas are used according to different cases of (△E) m , (△E) am , (△E) bm as follows: Case 1: (ΔE) m (ΔE) s , and (ΔE) am (ΔE) S , (ΔE) bm ≤ (ΔE) s when: B l = B j ; wherein: A l , B l are the color correction formulas, respectively; Formulation A j , A k Corresponding concentration of dye n; Case 2: (ΔE) m >(ΔE) S , and (ΔE) am ≤ (ΔE) S , (ΔE) bm >(ΔE) S A l = A j ; wherein: A l , B l are the color correction formulas, respectively; Formulation B j , B k corresponding concentration of dye n; U is: the weight coefficient at different wavelengths; T is: the rate of change of the color reflectivity value of the standard blended fabric with the K / S value; K b K / S value of the unit concentration of the dye required for the single-component fiber b: F ak For: Formula A k K / S value corresponding to the color of the fabric; F aj For: Formula A j K / S value corresponding to the color of the fabric; w a is: the content of the single-component fiber a in the blended fabric; Case 3: (ΔE) m (ΔE) S , and (ΔE) am (ΔE) S , (ΔE) bm (ΔE) s when: wherein: A l , B l are respectively a color correction formula; F al For: Formula A l K / S value corresponding to the color of the fabric; Case 4: (ΔE) m (ΔE) s , and (ΔE) am ≤ (ΔE) s , (ΔE) bm ≤ (ΔE) s when: if (△E) am ≤ (△E) bm , the color correction formula is the same as case 2; If (△E) am >(△E) bm , the correction formula is the same as case 1.

Images