Design method of four-color holographic point texture of color image fabric

Abstract

The present application relates to the technical field of textile design, and particularly relates to a design method of a four-color holographic technology point structure of a color image fabric, and the present application is applicable to a highly simulated image fabric, different gray value images of four groups of CMYK are obtained by using Photoshop, a four-group holographic technology point organization library is established, a problem of mutual non-covering among four layers of organizations is improved, and color development among colors is improved to an optimal state of an existing organization structure, and the color image fabric designed through the organization structure design method is soft and delicate in texture and rich in color.

Description

Technical Field

[0001] This invention relates to the field of textile design technology, specifically to a design method for the four-color holographic dot structure of a colored image fabric. Background Technology

[0002] Colored image jacquard fabrics are made by reproducing colored images through pattern and structure design using a color-woven jacquard weaving method. The design uses image processing and computer-aided design system. First, the image is separated into four CMYK channels, and then the color combination design is carried out through pattern. Currently, colored jacquard fabrics are all made by interlacing one set of colored yarns in the warp and weft directions. This color-developing method uses a spatial color mixing method with colored yarns at the same point. By establishing a regularly changing shadow and light structure, the length of the floating long lines in the shadow and light structure is determined by the gray-scale color separation. Since the gray-scale distribution of the four CMYK patterns in the whole image is not uniform, the structure library established by the conventional shadow and light change structure naturally has the problem of each layer of floating long lines covering each other. In the article "Analysis of the Slippage Law and Influencing Factors of Yarns in Woven Fabrics" in "Cotton Textile Technology", the inventor analyzed the slippage law and influencing factors of fabrics made of floating long lines. The six conditions for slippage are: the floating long lines on both sides have a covering relationship, the structure arrangement on both sides of the slippage is different, there is a three-dimensional space in the fabric structure where slippage occurs, there is a lateral squeezing force between the slipping yarn and the adjacent yarn that is greater than the lateral tension force, the other system of yarns interlaced with it provides a guiding role for the slipping yarn, and the yarn that slipped laterally reaches a force balance again in the new position. Based on the above six conditions, we can analyze various methods to avoid overlapping and occluding of adjacent yarns, including the design of the weave structure. The solution is to make the weave points of adjacent yarns at the junction complementary and the weave points of warp and weft opposite.

[0003] Currently, the published invention patent CN1793459A, "Method for Designing the Structure of Fully Color-Revealing Fabrics," proposes establishing full-color-revealing technical points to solve the problems of non-coverage of weave points and non-slippage of yarns in fabric structures. The method adopted is to use a single basic weave to design the shadow weave structure through the warp and weft directions to the full-color-revealing technical points. This set of weaves is applied by decomposing odd-numbered wefts and even-numbered wefts. In the invention patent CN1772989B, "Method for Designing Simulated Fabrics with Digital Images," it is proposed to establish a holographic weave library of basic weaves and their corresponding matching weaves. This technology splits and applies two sets of shadow weave libraries to form four sets of fully-color-revealing weave libraries applied to the four CMYK patterns. However, it also has certain drawbacks, namely that the number of shadow weave reinforcements can only be even numbers, and its maximum achievable value is limited. Another method is to use four sets of satin weaves from the basic weave design stage. The number of shadow weave reinforcements is not limited by even or odd numbers, which has a significant advantage in color expression. Both of the above techniques improve the situation of overlapping and covering between adjacent yarns. However, in practical applications, there are also problems that when the two sets of structures are separated, the number of reinforcement points of the shadow structure can only be set to an even number and the number of basic structure cycles can only be an even number. In practical applications, the color performance is significantly reduced compared to the case with the same number of cycles. There is also the problem of disrupting the texture, resulting in a rough fabric surface. Summary of the Invention

[0004] To address the issues of low color performance in existing technologies, this invention provides a design method for the four-color holographic dot structure of color image fabrics, which can improve the maximum color level of the image and enhance the color performance of the fabric.

[0005] This invention provides a method for designing the dot structure of a four-color holographic fabric, characterized by the following steps:

[0006] (1) Establish four basic organizational groups: A, B, C, and D;

[0007] (2) The four basic structures are established according to the principle of complementary adjacent yarn structures at the junction;

[0008] (3) Calculate the number of tissues that can be realized by the holographic color rendering technique dot tissue library for each group;

[0009] (4) Use weaving software to design the process of the image;

[0010] (5) Using Photoshop, the image of the process design is divided into four grayscale images of varying shades in CMYK mode using the "channel separation" method. The four sets of C, M, Y, and K images are saved separately in a format that the weaving software can recognize.

[0011] (6) Use texture software to perform cloud-pattern color separation processing on C, M, Y, and K images. Each group of images is assigned to a set of color numbers of the holographic color rendering technology point organization library, and four grayscale images with the same number of shades from light to dark are regenerated.

[0012] (7) Adjust the image design according to the design method of warp yarn color selection or weft yarn color display as needed, and correspond the four sets of holographic color display technology point organization library to the shadow light organization according to the gray scale change from light to dark according to the cloud pattern color separation.

[0013] (8) According to the pattern design process, the design is generated and the weft insertion sequence is designed to complete the large jacquard that can be read.

[0014] Furthermore, in step (1), the four basic weaves are twill or satin.

[0015] Furthermore, in step (1), the number of basic organization elements and the number of flying elements are the same for the four groups, but the starting points are different.

[0016] Furthermore, in step (2), the method for establishing four sets of holographic color development technique point organization libraries is as follows: after superimposing the organization points of the two basic organizations B and D, the full color development organization An of A is obtained by "film flipping"; after superimposing the organization points of the two basic organizations A and C, the full color development organization Bn of B is obtained by "film flipping"; after superimposing the organization points of the two basic organizations B and D, the full color development organization Cn of C is obtained by "film flipping"; after superimposing the organization points of the two basic organizations C and A, the full color development organization Dn of D is obtained by "film flipping"; the four basic organizations are respectively strengthened along the longitudinal direction to avoid the color development technique points until their respective full color development organizations are established, thus completing the establishment of four sets of holographic color development technique point organization libraries.

[0017] Furthermore, in step (3), the formula for calculating the number of tissues that can be realized in each group of holographic color development technique dot tissue libraries is as follows: N represents the number of tissues, R represents the number of tissue cycles, and M represents the number of tissue enhancements.

[0018] Furthermore, in step (4), the weaving software performs process design on the image by combining four types of yarns—cyan, magenta, yellow, and black—through four sets of holographic color rendering technology point libraries.

[0019] Furthermore, in step (5), Photoshop is first used to process the brightness, contrast, saturation and edge sharpening of the image with the process design.

[0020] Furthermore, in step (7), the correspondence between the four sets of holographic color rendering technology dot organization libraries and the light and shadow organization is as follows: C corresponds to A-An light and shadow organization, M corresponds to B-Bn light and shadow organization, Y corresponds to C-Cn light and shadow organization, and K corresponds to D-Dn light and shadow organization.

[0021] This invention can be applied to the design method of 4 groups of warp-oriented color-developing fabrics when designing a shadow-light structure with longitudinal reinforcement to a fully color-developing structure, and can also be applied to 4 groups of weft-oriented color-developing jacquard fabrics when designing a shadow-light structure with transverse reinforcement to a fully color-developing structure. At the same time, this method can also be used to design a jacquard fabric suitable for multiple groups of warp and weft-oriented color-developing jacquard fabrics as needed.

[0022] The beneficial effects of the present invention are as follows: The design method provided by the present invention is not limited by the prior art in terms of the number of tissue cycles and the number of reinforcement points. When M=1, the maximum number of tissues can be (R-2)+(R-3)×(R-1), which can nearly double the maximum number of tissues. The maximum number of tissues corresponds to the maximum number of color levels that can be represented, which means that the maximum color level of the image can be nearly doubled, and the color performance is superior to the existing public technology. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 These are four basic organizational diagrams of specific embodiments of the present invention.

[0025] Figure 2 This is a full-color imaging technique diagram of the tissues corresponding to the four groups of basic tissues in the specific embodiments of the present invention.

[0026] Figure 3 This is a phototactic tissue diagram corresponding to layer C in a specific embodiment of the present invention.

[0027] Figure 4 This is a phototactic tissue diagram corresponding to layer M in a specific embodiment of the present invention.

[0028] Figure 5 This is a phototactic tissue diagram corresponding to layer Y in a specific embodiment of the present invention.

[0029] Figure 6 This is a phototactic tissue diagram corresponding to layer K in a specific embodiment of the present invention.

[0030] Figure 7 This is a partial sample card style diagram of a specific embodiment of the present invention.

[0031] Figure 8 This is a diagram showing the correspondence between color codes and tissue types in a specific embodiment of the present invention.

[0032] Figure 9These are actual photographs of the color image fabric obtained according to specific embodiments of the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0034] Example 1

[0035] Based on corporate practices and comprehensive considerations of production costs, weft yarn color development method is selected for weaving. Conventional combed compact 60-count pure cotton natural color yarn is used for weaving, and four types of combed compact 60-count yarns in cyan, magenta, yellow and black are used for weft yarn. Both warp and weft yarns are 100% pure cotton yarn. According to the weaving specifications, the fabric is designed with a warp density of 173 ends / inch, a weft density of 260 ends / inch, and a weft width of 118 inches.

[0036] 1. Adjust the selected color image to 5040x5280 pixels using the Textile TOP software according to the production specifications and process design.

[0037] 2. After processing, the image is adjusted in Photoshop to improve brightness, contrast, saturation, and edge sharpening. This method is mainly used to solve the problem of color difference in subsequent fabric development and to highlight the three-dimensionality of the pattern edges. In CMYK mode, the color image is divided into four shades of grayscale images using the "channel separation" method. The four groups of C, M, Y, and K images are saved separately in BMP format that can be recognized by the weaving software.

[0038] 3. Establishment of a tissue library for four-layer holographic color development technology

[0039] (1) The establishment of four basic structures, namely A, B, C, and D, are four basic satin weave structures. The number of stitches and frets are the same for the four basic structures, but the starting points are different, such as... Figure 1 As shown.

[0040] (2) Based on the principle of complementary weft points of adjacent yarns at the junctions of the four basic weft groups, a four-group holographic color-developing technique point weft library is established. The method is as follows: the weft points of the basic weft groups B and D are superimposed and then "film flipping" is used to obtain the full color-developing weft An of A; the weft points of the basic weft groups A and C are superimposed and then "film flipping" is used to obtain the full color-developing weft Bn of B; the weft points of the basic weft groups B and D are superimposed and then "film flipping" is used to obtain the full color-developing weft Cn of C; the weft points of the basic weft groups C and A are superimposed and then "film flipping" is used to obtain the full color-developing weft Dn of D; the four basic weft groups are then reinforced longitudinally to avoid the color-developing technique points until their respective full color-developing wefts are obtained, thus completing the establishment of the four-group holographic color-developing technique point weft library. Figure 2 The diagram shows the full-color technique point structures corresponding to four basic structures. From left to right, the structures are full-color structure n, full-color structure Bn, full-color structure Cn, and full-color structure Dn.

[0041] (3) The formula for calculating the number of tissues that can be realized in each group of shadow and light tissues of the four sets of holographic color rendering technology point tissue structure design is: N=(R-2)+(R-3)×(R / M-1), where N is the number of tissues, R is the number of tissue cycles, and M is the number of shadow and light tissue reinforcements. When M=1, the maximum number of tissues that can be realized is N=(R-2)+(R-3)×(R / M-1), which can nearly double the maximum number of tissues.

[0042] (4) Using Photoshop, the image of the process design is divided into four grayscale images of different shades in CMYK mode by "channel separation". The four groups of C, M, Y and K images are saved in a format that the weaving software can recognize. First, Photoshop is used to process the brightness, contrast, saturation and edge sharpening of the image of the process design.

[0043] (5) Use texture software to perform cloud-pattern color separation processing on C, M, Y and K images. Each group of images is assigned to a set of color numbers of the holographic color rendering technology point organization library, and four grayscale images of the same number from light to dark are regenerated.

[0044] (6) Adjust the design of the image according to the design method of warp yarn color selection or weft yarn color display, and correspond the four sets of holographic color display technology point organization library to the shadow light organization according to the gray scale change from light to dark according to the cloud pattern color separation. Figure 3 , Figure 4 , Figure 5 , Figure 6 The light and shadow structures corresponding to C, M, Y, and K are shown respectively, that is, C corresponds to A-An light and shadow structure, M corresponds to B-Bn light and shadow structure, Y corresponds to C-Cn light and shadow structure, and K corresponds to D-Dn light and shadow structure.

[0045] 4. Computer-aided weaving process design: The design method combines four yarns—cyan, magenta, yellow, and black—and utilizes four sets of holographic color rendering technology point libraries to complete the process.

[0046] (1) Open the image (C, M, Y, K) in the Textile Top software. Separate the images to 14 colors. The number of colors separated should be less than the number of colors in the holographic design. Based on the weft color rendering principle, rotate the image counterclockwise by 90°, adjusting the horizontal pixels to 1 / 4 of the original image. Note that the vertical pixels remain unchanged after rotation. If the number of sample cards exceeds the software's limit, it needs to be cropped into two sets (left and right) for design. If it does not exceed the limit, cropping is unnecessary. Since the pixel count in this design exceeds the current sample card limit, the two sets of images are cropped to 660x5040 pixels each. Save the images. Create a sample card with a width of 16 and a height of 165, as shown in the attached image. Figure 7 As shown, four color selection needles are set to use four weft yarns: cyan, magenta, yellow, and black.

[0047] (2) Extract 16 four-layer holographic tissue samples from the tissue archive, select the multi-pattern plate input, warp count: 4, weft count: 1, and enter the correspondence table between weft count / warp count, color number and tissue structure. Figure 8 The color codes and their corresponding weave structures are shown. Select 1 / 1 for C, 1 / 2 for M, 1 / 3 for Y, and 1 / 4 for K. Choose the starting point for the pattern, which is the upper left corner. Generate a pattern swatch using the weaving software, and save the swatch file. After completing the left and right designs, combine them into a single pattern swatch file and save it. Then, rotate the pattern swatch counter-clockwise, add the weft stitches and edge weave to convert it into a design drawing. Output the design drawing as a JC5 file that can be read by a large jacquard machine and save it.

[0048] 5. Weaving: This embodiment is produced on a 360-type wide-width air-jet loom and electronic jacquard loom. The loom is equipped with a warp beam of combed compact spun 60s pure cotton yarn, with a total of 20,420 warp ends. The JC5 file is copied into the jacquard loom computer. According to the weft insertion design, combed compact spun 60s blue pure cotton yarn is introduced into the #1 weft inserter, combed compact spun 60s magenta pure cotton yarn is introduced into the #2 weft inserter, combed compact spun 60s yellow pure cotton yarn is introduced into the #3 weft inserter, and combed compact spun 60s black pure cotton yarn is introduced into the #4 weft inserter.

[0049] The main process parameters of the equipment were optimized. First, the weft insertion air pressure parameters of the four weft feeders were set. The optimal process was as follows: the weft insertion time of the main nozzle was 90-180°, the air pressure was 0.2MPa for the main nozzle and 0.3MPa for the auxiliary nozzle. The loom process parameters were as follows: the height and low position scale of the back beam was -2, the front and back position scale was 5, the front and back position scale of the warp stop frame was 0, the height and low position scale was -1, the loom shedding time was 300 degrees, the loom tension was 330kgf, and the start-up condition was good.

[0050] 6. Dyeing and finishing: This type of fabric is a yarn-dyed fabric. In the dyeing and finishing process, only singeing, desizing, and light bleaching are performed before stretching and setting to obtain the finished fabric.

[0051] Figure 9 The image shows a photograph of the actual color image fabric obtained in this embodiment, which has a large color gradation and strong color expression of the fabric.

[0052] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be covered within the protection scope of the present invention.

Claims

1. A method for designing the dot structure of a four-color holographic fabric, characterized in that, Includes the following steps: (1) Establish four basic organizational groups: A, B, C, and D; (2) The four basic structures are established according to the principle of complementary adjacent yarn structures at the junction, and four holographic color development technology point structures are established; (3) Calculate the number of tissues that can be realized by the holographic color development technique dot tissue library for each group; (4) Use weaving software to design the process of the image; (5) Using Photoshop, the image of the process design is divided into four grayscale images of varying shades in CMYK mode using the "channel separation" method. The four sets of C, M, Y, and K images are saved separately in a format that the weaving software can recognize. (6) Use texture software to perform cloud-pattern color separation processing on C, M, Y, and K images. Each group of images is assigned to a set of color numbers of the holographic color rendering technology point organization library, and four grayscale images with the same number of shades from light to dark are regenerated. (7) Adjust the design of the image according to the design method of warp yarn color selection or weft yarn color display, and make the four sets of holographic color display technology point organization library corresponding to the shadow light organization according to the gray change from light to dark according to the cloud pattern color separation; (8) Based on the pattern design process, the design concept and weft insertion sequence are sequentially designed to complete the large jacquard recognizable file; In step (1), the four groups of basic organization have the same number of pieces and flying numbers, but different starting points; In step (2), the method for establishing four sets of holographic color development technique point organization libraries is as follows: after superimposing the organization points of the two basic organizations B and D, the full color development organization An of A is obtained by "film flipping"; after superimposing the organization points of the two basic organizations A and C, the full color development organization Bn of B is obtained by "film flipping"; after superimposing the organization points of the two basic organizations B and D, the full color development organization Cn of C is obtained by "film flipping"; after superimposing the organization points of the two basic organizations C and A, the full color development organization Dn of D is obtained by "film flipping"; the four basic organizations are strengthened along the longitudinal direction to avoid the color development technique points until their respective full color development organizations are established, thus completing the establishment of four sets of holographic color development technique point organization libraries; In step (3), the formula for calculating the number of tissues that can be realized in each group of holographic color development technique dot tissue library is as follows: N represents the number of tissues, R represents the number of tissue cycles, and M represents the number of tissue enhancements.

2. The design method for the four-color holographic dot structure of a color image fabric as described in claim 1, characterized in that, In step (1), the four basic weaves are either twill or satin.

3. The design method for the four-color holographic dot structure of a color image fabric as described in claim 1, characterized in that, In step (4), the weaving software performs the process design on the image by combining four types of yarns—cyan, magenta, yellow, and black—through four sets of holographic color rendering technology point libraries.

4. The design method for the four-color holographic dot structure of a color image fabric as described in claim 1, characterized in that, In step (5), Photoshop is first used to process the brightness, contrast, saturation and edge sharpening of the image with the process design.

5. The design method for the four-color holographic dot structure of a color image fabric as described in claim 1, characterized in that, In step (7), the correspondence between the four sets of holographic color rendering technology dot organization libraries and the light and shadow organization is as follows: C corresponds to A-An light and shadow organization, M corresponds to B-Bn light and shadow organization, Y corresponds to C-Cn light and shadow organization, and K corresponds to D-Dn light and shadow organization.

Images