A fabric weave design method for improving the fineness of a color image

Abstract

The present application relates to the technical field of textile design, and particularly relates to a fabric organization design method for improving the fineness of a color image picture, comprising the following steps: (1) establishing four basic organizations, and establishing four groups of holographic technical point organizations according to the four basic organizations; (2) segmentally designing the strengthening point direction of the color-developing yarns of the four basic organizations, and segmentally setting the starting positions of the strengthening organization points; (3) establishing each group of shadow light organizations according to the four groups of basic organizations combined with the color-developing technical point organizations thereof; and (4) according to the technical point requirements of the full color-developing organizations, avoiding the color-developing technical points when establishing each group of shadow light organizations, and sequentially strengthening according to the order of the selected positions until the full color-developing organizations are completed, thereby forming a group of shadow light organizations. The color image picture jacquard fabric obtained by the present application has natural color transition, rich texture and delicate levels, and can be applied to design and develop image fabric such as picture works, landscape pictures, historical famous pictures and portrait pictures.

Description

Technical Field

[0001] This invention relates to the field of textile design technology, and specifically to a fabric structure design method for improving the detail of color images. Background Technology

[0002] Color image-based fabrics are a design method that applies digital simulation technology to the textile industry using digital jacquard weaving technology. After designing and adjusting a color image into a continuous and productionable image, color image-based fabrics are designed and produced using weaving CAD technology. The design is based on the characteristic of image clarity represented by resolution; higher resolution means more pixels. The principle of color representation in color image-based fabrics is to reproduce the image from the image using the number of interlacing cycles of warp and weft yarns. In the design of such products, to improve the high fidelity of the image-based fabric, the length of the float threads in the weave structure is generally increased to enhance color expression; that is, a weave structure with a larger repeat count is selected. The larger the repeat count, the longer the float threads. However, the increase in float threads directly affects the fineness of the fabric image, as well as the fabric's abrasion resistance and the tendency to snag, thus affecting the user experience of the finished product.

[0003] Existing technologies all improve fabric color rendering by achieving color rendering of yarns that do not obscure each other through weave structure, but no design method for improving image detail has been disclosed. Patent CN1772989 B proposes that to obtain good light and shadow effects, the reinforcement direction of the base weave should be right-to-left, and the reinforcement direction of the complementary weave should be left-right-to-right. The mid-way change of reinforcement direction objectively alleviates this problem to some extent. The opposite reinforcement directions of the base and complementary weaves will further improve the slippage between adjacent yarns. Even with the full color rendering technology points, local slippage and obscuring can still occur between adjacent yarns within the length of the float. However, this method of interlacing adjacent weft points will affect the color rendering at the joining point, thus affecting the image detail. Patent CN 105970435 A describes dividing an image into five colors for weaving. The pattern design uses a transition from weft satin to plain weave and then to warp satin. However, this method is only suitable for low-density fabrics. In addition, this method has the problem of using satin and plain weave in the weave design. In actual production, the weave structure of this combination is very unstable and can only produce low-density fabrics. Furthermore, the low warp and weft density has certain defects in the color and image detail of the colored image fabric. The paper "The Influence of Starting Point Position Setting of Three-Weft Combination Full-Color Rendering Structure on Fabric Color Rendering" analyzes the starting point position of the three-weft combination full-color rendering structure. It analyzes and verifies the gradient color rendering effect and color saturation of the fabric structure by designing the starting point positions of three basic structures under RGB format. At the same time, the reinforcement point is a full-color rendering structure library formed by increasing the points to the right in the same way. This method has a certain effect on improving the saturation and color of the fabric image, but it also has problems. No matter how the starting position of the structure point changes, the right-increasing point method still results in an overly obvious diagonal texture on the fabric surface, presenting a cavalry diagonal appearance. In addition, the basic structure with a large repeat number has excessively long floats, which are prone to snagging and abrasion during use. Summary of the Invention

[0004] To address the technical problem of precision in color portrait fabrics, this invention provides a fabric structure design method to improve the fineness of color portrait images. The resulting color portrait jacquard fabric has natural color transitions and rich, delicate textures, and can be applied to the design and development of portrait fabrics such as calligraphy and painting works, landscape pictures, historical paintings, and portraits.

[0005] This invention provides a fabric structure design method for improving the detail of color images, comprising the following steps:

[0006] (1) Establish four basic organizations, and establish four groups of holographic technology point organizations based on the four basic organizations;

[0007] (2) Design the reinforcement point direction of the four basic structure color-developing yarns in segments, and set the starting position of the reinforcement point in each segment;

[0008] (3) Based on the four basic groups of the design and their color rendering technology points, establish the shadow and light organization of each group;

[0009] (4) According to the technical requirements of full color development, avoid the color development technical points when establishing each group of shadow and light structures, and strengthen them in sequence according to the selected positions until the full color development is completed, thus forming a group of shadow and light structures.

[0010] Furthermore, in step (1), the four basic structures are weft twill or satin weaves with a single warp weave point having the same number of repeats for the warp and weft yarns.

[0011] Furthermore, the four basic organizations have different starting points.

[0012] Furthermore, in step (2), the segmented design method is to adopt an even distribution in the direction of the reinforcement points.

[0013] Furthermore, in step (2), the reinforcement points are evenly distributed and then averaged again.

[0014] Furthermore, in step (2), the number of segments is designed based on the number of color code segments.

[0015] Furthermore, in step (2), the color-developing yarn uses multiple sets of warp yarns or multiple sets of weft yarns for color development.

[0016] Furthermore, in step (4), the fully chromogenic structure is verified by calculating the average floating length line, and the calculation formula is as follows: F is the average length of the float line, R is the number of organization cycles, and t is the number of interleavings.

[0017] The beneficial effects of this invention are as follows:

[0018] (1) This invention achieves the production of colored image fabric by setting the shadow light structure. It adopts four groups of shadow light structures formed by segmentation and calculates the total length of the floating long thread of each group of shadow light structures to reduce the length of the floating long thread and complete the design of the weaving technology.

[0019] (2) The present invention solves the problem that the surface texture of existing colored image fabrics with long floats and long lines of shadow light structure is too clear and obvious, which leads to reduced wear resistance and easy snagging of the fabric, affecting the user experience of the end product. The colored image fabric produced by the present invention has a delicate texture and a realistic appearance.

[0020] (3) The present invention designs a full color rendering tissue library by improving the length of the floating thread. It will not be affected by the increase of the number of tissue cycles, such as the wear resistance, anti-snagging and practical experience of the fabric. At the same time, compared with the existing technology, the texture of the fabric is more refined, soft and delicate, with advantages such as smooth surface and wear resistance. It also has obvious advantages in improving the various physical properties of the fabric. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a basic organizational diagram of a specific embodiment of the present invention.

[0023] Figure 2 This is a diagram showing the locations of the four sets of reinforcement points in a specific embodiment of the present invention.

[0024] Figure 3 This is a tissue diagram showing the addition of reinforcement points in a specific embodiment of the present invention.

[0025] Figure 4 This is a phototactic tissue diagram corresponding to layer C in a specific embodiment of the present invention.

[0026] Figure 5 This is a phototactic tissue diagram corresponding to layer M in a specific embodiment of the present invention.

[0027] Figure 6 This is a phototactic tissue diagram corresponding to layer Y in a specific embodiment of the present invention.

[0028] Figure 7 This is a phototactic tissue diagram corresponding to layer K in a specific embodiment of the present invention.

[0029] Figure 8 This is a partial sample card style diagram of a specific embodiment of the present invention.

[0030] Figure 9 These are the four sets of colorimetric relationships corresponding to the C, M, Y, and K images in a specific embodiment of the present invention.

[0031] Figure 10 This is a schematic diagram of a specific embodiment of the present invention.

[0032] Figure 11 These are comparison images of fabrics obtained through specific embodiments of the present invention and conventional reinforced fabrics.

[0033] Figure 12This is a comparison diagram of the specific embodiment of the present invention and the starting position of conventional tissue reinforcement.

[0034] Figure 13 This is a comparison diagram of the specific embodiment of the present invention and the tissue after 7 reinforcements of the tissue points using conventional methods. Detailed Implementation

[0035] 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.

[0036] Example 1

[0037] Based on production practices and costs, this embodiment uses weft yarn color development for production. The warp yarn is pure cotton natural color combed compact spun 60-count yarn, and the weft yarn is cyan, magenta, yellow, and black combed compact spun 60-count pure cotton yarn. The fabric specifications on the machine are: width 118 inches, warp density 173 ends / inch, and weft density 260 ends / inch.

[0038] 1. Adjust the selected color image to 5040 pixels vertically and 5280 pixels horizontally according to the production process.

[0039] 2. Using Photoshop, adjust the saturation, brightness, contrast, and edge sharpening of the color image after pixel adjustment to make the colors more vibrant and enhance the three-dimensionality of the pattern boundaries. Then, convert the color image to CMYK mode. This method, based on the principle of four-color weft yarn production, layers the color image to create four sets of black and white images with varying shades (C, M, Y, K). Save this as a BMP format that the weaving software can recognize.

[0040] 3. Establishing a segmented lighting and shadow organization library is a key technology for improving image detail. The specific design method is as follows:

[0041] 1) The design is based on a 16-end, 9-weave satin weave, as shown in the attached diagram. Figure 1 As shown, these are four basic satin weave structures, A, B, C, and D, with the same number of frets but different starting points.

[0042] 2) Determine the location of reinforcing points based on the four selected basic tissue groups, as shown in the attached figure. Figure 2This design is divided into four segments, specifically by dividing the segments in a uniformly distributed manner along the direction of the reinforcement points. Figure 3 The locations for adding four sets of reinforcement points are shown;

[0043] 3) According to Figure 3 As shown, one tissue point is added sequentially to each of the four selected enhancement points along the direction of meridional enhancement, taking care to avoid color development points. Enhancement is performed sequentially according to the selected positions until full color development is complete, thus forming the light and shadow structure of each group. Figure 4-7 The light and shadow structures corresponding to layers C, M, Y, and K are shown respectively;

[0044] The fully chromogenic structure designed using the above method can be verified by calculating the average floating length, using the formula F = R / t.

[0045] F is the average length of the float line, R is the number of tissue loops, and t is the number of interleavings.

[0046] Taking the minimum number of weft threads achievable with a 16-end satin weave as an example, conventional shading weaves start from a single warp weave point and gradually strengthen. Without considering the full color rendering point, the number of times the shading weaves are interlaced (t) is 2. The drop length and float length of the shading weaves in this group are 1 / 15, 2 / 14, 3 / 13, 4 / 12, 5 / 11... respectively. According to the formula, the total average float length F of the entire shading weave group is 8.

[0047] By dividing the weft cycle number into four equal segments and strengthening each segment in turn, the long floating lines are shuffled, thus increasing the number of interlacing. Without considering the full color rendering technology points, the t values ​​of this group of light and shadow structures are 2, 4, 6, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 2. According to the formula, the average floating length of this group of light and shadow structures is 8, 4, 2.667, 2, 2, 2, 2, 2, 2, 2, 2, 2.667, 4, 8, and the total average floating length F of the entire group of light and shadow structures is 3.2. When achieving the same 16-layer structure, the average floating length of the entire group of structures is only 39% of that of the conventional method, thus significantly improving the refinement of the color image fabric.

[0048] 4. Textured weaving design:

[0049] 1) In the texture top file, open the four groups of images C, M, Y, and K. The minimum number of tissues is selected in this case. According to the establishment of the four groups of light and shadow tissues, there are 14 tissues. The cloud pattern color separation design in this process is 14 levels within the group, which are divided into 14 colors from light to dark.

[0050] 2) This time weft yarn color rendering is used, so the C, M, Y, K images processed by color separation are adjusted by rotating 90° counterclockwise. At the same time, the horizontal pixels need to be adjusted to 1 / 4 of the original image, while the vertical pixels remain unchanged.

[0051] 3) Create a pattern template. Design according to the maximum number of pattern templates that the software can design. If the maximum number of pattern templates is exceeded, you can design by cutting it in half. If it is not exceeded, there is no need to consider cutting. The pixel size of this design has exceeded the current number of pattern templates, so after left and right cropping, the two sets of images are 660x5040 pixels each. Save the images; create a pattern template with a width of 16 and a height of 165, as shown in the attached image. Figure 8 The sample card shows a partial pattern, which is set with 4 color selection needles and uses cyan, magenta, yellow and black weft yarns respectively;

[0052] 4) Extract four sets of shadow and light tissue libraries, output the texture plate, warp count: 4, weft count: 1, enter the correspondence table of weft count / warp count, color number and tissue relationship, and refer to the appendix. Figure 9 The color codes and their corresponding weave layers are shown. Select 1 / 1 corresponding to C, 1 / 2 to M, 1 / 3 to Y, and 1 / 4 to K. Select the starting point for the weave pattern, with the top left corner as the starting point. Generate a weave pattern swatch using the weave top software, and then save the pattern swatch file. After completing the left and right sets of designs, combine them into one pattern swatch file and save it. Then, rotate the pattern swatch file counter-clockwise, add the weft stitches and edge weave, and convert the pattern swatch file into a design drawing, as shown in the image. Figure 10 As shown, the design drawing is output as a JC5 file that can be read by a large jacquard machine and then saved.

[0053] 5. Weaving on the loom: 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 weft inserter #1, combed compact spun 60s magenta pure cotton yarn into the weft inserter #2, combed compact spun 60s yellow pure cotton yarn into the weft inserter #3, and combed compact spun 60s black pure cotton yarn into the weft inserter #4. The main process parameters of the equipment were optimized. Before starting the machine, the air pressure parameters for the weft insertion of the four weft feeders were set. The optimal process was as follows: weft insertion time of the main nozzle was 90-180°; air pressure: 0.2MPa for the main nozzle and 0.3MPa for the auxiliary nozzle; loom process parameters: back beam height / low position scale was -2, front / back position scale was 5; warp stop frame front / back position scale was 0, height / low position scale was -1; loom shedding time was 300 degrees; machine tension was 330kgf; and the machine was running smoothly. After finishing, inspection, and fabric repair, the fabric was put into storage.

[0054] 6. Dyeing and finishing: The colored jacquard fabric woven in this invention is yarn-dyed. In the dyeing and finishing process, the fabric undergoes singeing, desizing, light bleaching, stretching and setting, and packaging to obtain the finished fabric.

[0055] Figure 11 The image shows a physical sample of a colored jacquard fabric with a conventional reinforced structure (left image) and a segmented light-reinforcing structure of the present invention (right image). It can be seen that the fabric obtained by the present invention has natural color transitions and rich and delicate textures. It can be applied to the design and development of image fabrics such as calligraphy and painting works, landscape pictures, historical paintings, and portraits.

[0056] Figure 12 The diagram shows a comparison of the starting positions of the tissue points reinforced using conventional methods (left image) and the starting positions of the tissue points reinforced using the design method of this invention (right image). Figure 13 The diagram shows a comparison of the fabric structure reinforced seven times using conventional reinforcement (left image) and the fabric structure reinforced seven times using the design method of the present invention (right image). As can be seen from the diagram, there is a clear difference in the float lines between the two structures, and the fabric scene produced by the present invention has a higher degree of detail.

[0057] 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 fabric structure design method for improving the detail of color images, characterized in that, Includes the following steps: (1) Establish four basic organizations, and establish four groups of holographic technology point organizations based on the four basic organizations; (2) Design the reinforcement point direction of the four basic structure color-developing yarns in segments, and set the starting position of the reinforcement point in each segment; (3) Based on the four basic groups of the design and their color rendering technology points, establish the shadow and light organization of each group; (4) According to the technical requirements of full color development, avoid the color development technical points when establishing each group of shadow and light structures, and strengthen them in sequence according to the selected positions until the full color development is completed, thus forming a group of shadow and light structures. In step (2), the segmented design method is to adopt an even distribution in the direction of the reinforcement points; In step (4), the fully chromogenic structure is verified by calculating the average floating length line. The calculation formula is as follows: F is the average length of the float line, R is the number of organization cycles, and t is the number of interleavings.

2. The fabric structure design method for improving the detail of color images as described in claim 1, characterized in that, In step (1), the four basic structures are single warp weave or satin weave structures with the same number of warp and weft yarns.

3. The fabric structure design method for improving the detail of color images as described in claim 2, characterized in that, The four basic organizations have different starting points.

4. The fabric structure design method for improving the detail of color images as described in claim 1, characterized in that, In step (2), the reinforcement points are evenly distributed and then averaged again.

5. The fabric structure design method for improving the detail of color images as described in claim 1, characterized in that, In step (2), the number of segments is designed based on the number of color codes.

6. The fabric structure design method for improving the detail of color images as described in claim 1, characterized in that, In step (2), the color-developing yarn is developed using multiple sets of warp yarns or multiple sets of weft yarns.

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