CN113373582A

CN113373582A - Method for digitalizing original image and weaving it into digital image

Info

Publication number: CN113373582A
Application number: CN202010157134.XA
Authority: CN
Inventors: 吕萧辉; 王培钧
Original assignee: Mitrana Textile Co ltd
Current assignee: Mitrana Textile Co ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2021-09-10

Abstract

A method for weaving a fabric having an image with a longitudinal axis height, the method comprising the steps of: selecting an integer N as the minimum number of color matching units; providing a circular knitting device with a plurality of yarn selecting units; sequentially combining the yarn selecting units into a plurality of yarn selecting unit combinations, wherein each yarn selecting unit combination is formed by N yarn selecting units, and each yarn selecting unit is configured to select one of a main color yarn and a matched color yarn with a color different from that of the main color yarn; estimating a number K of image longitudinal units according to the minimum number N of color matching units, the height of the longitudinal axis and a single-layer knitting height; dividing the image into L horizontal sections according to a target horizontal resolution and the number K of the image longitudinal units, and dividing the image into an array of pixel positions of L multiplied by K.

Description

Method for digitalizing original image and weaving it into digital image

Technical Field

The present invention relates to a method for digitizing an original image; and more particularly to a method for digitizing original images into digital images.

Background

Weaving is a traditional industry. The weaving mode of the cloth can be divided into plain weaving and knitting basically, and the knitted cloth is elastic, so that the demand of the knitted cloth is greatly increased along with the popularization of global leisure sports in recent years, and the knitted cloth becomes a new favorite in the clothing industry. However, in both the flat weaving and the knitting, in order to make the fabric have rich colors, it is inevitable to perform a dyeing and finishing process after finishing the gray fabric. The discharge of dye waste liquid from dyeing and finishing factories is one of the major points of supervision of environmental protection units for many years, and many dyeing and finishing manufacturers are forced to close factories or move under the condition of difficult conformity with local environmental protection regulations, which causes a large impact on the industrial chain.

Colorful and rich-pattern textiles are easy to be favored by the market, but patterns with rich color gradation and high pattern complexity are difficult to be realized in a weaving mode. Since the color configuration of such patterns must be very accurate, even though the contour and color effect of the colored pattern through dyeing and finishing are easy to be distorted, no technology exists in the market that can realize the pattern with rich color gradation and high composition complexity on the square textile through the color material of the yarn in a knitting manner. Although some flat weaving techniques can weave colored patterns with colored yarns, the high resolution pictures currently displayed on high definition screens are still not represented in a woven manner.

Therefore, how to generate patterns with rich color gradation and high resolution on the condition of keeping smooth touch of the knitted fabric is a technical problem to be solved.

Disclosure of Invention

The invention provides a method for weaving a fabric with images, which forms an independent color block through weaving of color yarns, and finally forms a colorful pattern with high resolution on a cloth surface without subsequent dyeing and finishing processing, and can also keep smooth touch of the cloth, thereby being a technical breakthrough with great innovation.

According to an embodiment of the present invention, a method for weaving a fabric having an image with a height of a longitudinal axis is proposed, comprising the steps of: selecting an integer N as the minimum number of color matching units; providing a circular knitting device with a plurality of yarn selecting units; according to the minimum number N of the color matching units, the yarn selecting units are sequentially combined into a plurality of yarn selecting unit combinations, wherein each yarn selecting unit combination is formed by N yarn selecting units, and each yarn selecting unit is configured to select one of main colored yarns and matched colored yarns with different colors from the main colored yarns; estimating the number K of longitudinal units of the image according to the minimum number N of color matching units, the height of the longitudinal axis and the height of single-layer knitting; dividing the image into L horizontal sections according to a target horizontal resolution and the number K of the longitudinal units of the image, and dividing the image into an array of pixel positions of L multiplied by K; respectively forming N L multiplied by K point array images corresponding to the L multiplied by K pixel position arrays by color analysis of the images according to N primary colors corresponding to the main color yarns of the N yarn selecting units, wherein each point in the N L multiplied by K point array images is one of bright and dark; determining a minimum number of knitting units m; for each of the N lxk point array images, adjusting the points with the number of continuous bright or dark points less than m along each horizontal line to be consistent with the bright-dark state of the adjacent points, thereby forming N adjusted lxk point array images; determining a selection of each of the primary colors and the blending colors for each of the pixel positions based on the array of LxK pixel positions to form an LxK digital pixel array of the image; and weaving the fabric with the image according to the L multiplied by K digital pixel array by using the circular knitting device.

According to another embodiment of the present invention, there is provided a fabric with an image, having horizontal and vertical directions and front and back sides, manufactured according to circular knitting, wherein: the image is composed of an array of pixel units, each pixel unit basically presents a rectangular outline; each of the pixel units includes a plurality of pairs of color yarns repeatedly arranged in the same order in the vertical direction; each pair of dyed yarns comprises a main dyed yarn with primary color and a matched dyed yarn with matched color; the front surface is on the same horizontal position, one of the primary colors and the matched colors belonging to the same color yarn pair appears along the horizontal direction, and the same color is continuously appeared along the horizontal direction, and the continuous knitting number s is not less than the minimum.

According to another embodiment of the present invention, a method for digitizing an original image into a digital image, wherein the digital image has a width W, is provided, the method comprising the steps of: selecting an integer N as the minimum number of color matching units such that the colors of the digital image are formed based on N primary colors; determining the number K of vertical units of the image according to the height of the digital image and the value N; selecting a target horizontal resolution L; forming pixel arrays in L x K while mapping to the original image and the digital image to be formed; determining a digital image limit distance based on the distance between the assumed observer and the digital image; determining a minimum number of display elements s according to W, L and the digital image limit distance; and judging whether one of the N primary colors on the corresponding horizontal line has a section with the number of continuous bright or dark pixels less than s in the range of the K value of the original image, and adjusting the brightness of the corresponding section on the digital image to be consistent with the brightness of the adjacent pixels according to a specific principle when judging that the section exists.

The invention can be used for generating required colors and patterns on the front surface of the circular knitting cloth, and has industrial applicability.

Drawings

This invention is further described in the following detailed description of the drawings

FIG. 1A is a conceptual view of a yarn selecting unit according to an embodiment of the present invention;

FIG. 1B is a schematic color diagram of each horizontal layer of a fabric according to an embodiment of the present invention;

FIG. 1C shows a schematic diagram of a pixel array;

FIG. 1D is a schematic diagram of a full-color pixel array formed by combining 4 primary color pixel arrays according to an embodiment of the invention;

FIGS. 2A-2N are schematic diagrams of an embodiment of a method for digitizing an original image into a digital image according to the present invention;

FIGS. 3A-3H are schematic diagrams of another embodiment of a method of digitizing an original image into a digital image according to the invention;

FIGS. 4A-4N are schematic diagrams of another embodiment of a method of digitizing an original image into a digital image according to the invention;

FIG. 5 is a flow chart illustrating a method for digitizing an original image into a digital image according to the present invention;

FIG. 6 is a schematic diagram showing another process of the present invention for digitizing an original image and weaving the original image into a digital image.

Detailed Description

While the present invention will be described in conjunction with the following embodiments, which will enable those skilled in the art to practice the invention, it is not intended that the present invention be limited to the embodiments shown.

In the age of digital images, people are used to pictures with rich colors and high resolution. Conventional digital pictures such as television images are typically scanned layer by layer along the horizontal direction. When a color picture is required, the basic units of the digital picture are pixels (pixels) capable of displaying three primary colors, and the pixel arrays on the display screen sequentially display corresponding colors and brightness from top to bottom along horizontal lines from left to right through the control of electronic signals. By using the effect of persistence of vision, the overall high resolution color picture is seen by the naked eye. The horizontal resolution of a general tv is about 512 pixels, while the horizontal resolution of a high-definition tv is about 1K (1000 pixels), and the popular high-definition movies even reach 4K or more. However, in the conventional display signboard, it is difficult to realize a color image having high image quality and rich gradation.

The circular knitting technology is characterized in that a strand of yarn is temporarily stored above a knitting machine, the yarn required for knitting is supplied from top to bottom, a knitting needle arranged below the knitting machine is sequentially matched with the yarn distribution of a yarn selecting rod surrounding the middle, the yarn is hooked into a fabric to be knotted, and the cylindrical fabric is formed layer by layer like knitting a sweater. The cylindrical fabric of the final product is cut open to form a piece of square fabric. Circular knitting machines can be equipped with up to about 3000 needles on the same layer of fabric, i.e. on the same horizontal line. If each needle is compared to a pixel, a color image with high quality, such as a color picture or photograph, can be realized by the knitting method.

The problem is that unlike pixels of electronic display devices having three primary colors, a single smallest yarn selection unit of circular knitting, i.e. a yarn feeding bar, can only have two selections of yarns of different colors. Furthermore, the yarns used in the knitted fabric for general clothing are thin, and it is difficult for the naked eye to recognize the colors of the yarns which are frequently interlaced too much. In other words, the color gradation is so rich that the primary colors between adjacent pigments need to be frequently interlaced in the image area, and it is difficult to directly apply the pixel concept of dot matrix to be expressed through the knitting technology. It is therefore necessary to try to specify the smallest color unit of the fabric, i.e. the smallest color unit of the plurality of yarn feeding devices constituting the basic pixel unit, as a basic means for realizing the pixels of the digital image knitted fabric. In addition, the minimum number of continuous knitting of the same color yarn, or the minimum number of knitting units m, which can be recognized by naked eyes on the same horizontal line, needs to be determined according to actual requirements. Thus, the finished product can have a color image with high quality and rich gradation that can be appreciated by the naked eye of a general person.

Please refer to fig. 1A, which shows a concept of a yarn selecting unit device according to an embodiment of the method for digitizing an original image and weaving a digital image according to the present invention. For convenience of explanation, the color image shown in fig. 2A is taken as an example of the original image. Since the color content of the image is rich, 4 primary colors of blue (B), red (R), green (G), yellow (Y), etc. may be selected to form the basic primary colors of each constituent pixel, so according to the present embodiment, the minimum number of color matching units N is equal to 4, and the yarn selecting units on the circular knitting device are sequentially formed into a plurality of yarn selecting unit combinations 110, 111, etc. as illustrated in fig. 1A. Fig. 1A shows an arrangement of a plurality of yarn selection units 1101/1102 … 1114 … etc. on a circular knitting device, wherein the respective yarn selection units have two different color yarn options. Taking two yarn selecting unit combinations 110 and 111 as an example in the figure, they are respectively composed of 4 yarn selecting units 1101-.

Specifically, the yarn selection unit 1101 may select a blue (B) color yarn 1101a or a non-blue (NB) color yarn 1101B according to the instruction, the yarn selection unit 1102 may select a red (R) color yarn 1102a or a non-red (NR) color yarn 1102B according to the instruction, the yarn selection unit 1103 may select a green (G) color yarn 1103a or a non-green (NG) color yarn 1103B according to the instruction, and the yarn selection unit 1104 may select a yellow (Y) color yarn 1104a or a non-yellow (NY) color yarn 1104B according to the instruction. The 4 yarn selection units 1111-.

Referring to FIG. 1B, the colors of the horizontal layers of the knitwear manufactured by the circular knitting device configured according to the embodiment of the yarn selecting unit in FIG. 1A are shown. In accordance with the concepts of the present invention, knitting of the same horizontal layer on the fabric is represented by the same pair of primary colors and colored yarns of a matching color (not the primary colors), e.g.,

yarn selection units

1101 and 1111 of FIG. 1A may knit together

horizontal layers

211 and 221 of FIG. 1B such that the

horizontal layers

211 and 221 represent a blue (B) or non-blue (NB) color; the

yarn selection units

1102 and 1112 of fig. 1A may weave together the

horizontal layers

212 and 222 of fig. 1B such that the

horizontal layers

212 and 222 exhibit a red (R) or non-red (NR) color. The adjacent 4 levels of the horizontal layers 211-214 form one set of horizontal layer units 210, and the horizontal layers 221-224 form another set of horizontal layer units 220. In accordance with the invention, each set of horizontal layer elements 210/220 has the horizontal layer colors arranged in the same order.

The minimum number of units N and the selection of the primary colors/patches described above are often determined by the user based on the primary colors of the original image and practical considerations. The minimum number of color matching units N is necessarily an integer, but for the same original image, in addition to the point that the image itself is rich in color and hue, the resolution of the picture to be presented needs to be taken into consideration. For example, if the number of yarn selecting units provided in a circular knitting device for knitting is 3000, the minimum number of color matching units N to be considered is preferably 3 in order to realize a screen having a horizontal resolution of 1K (about 1024). However, if the number of yarn selecting units of the circular knitting device is only 2000 and a full-color picture with a horizontal resolution of 1K (about 1024) is desired to be realized, the minimum number of color matching units N can be selected to be maintained at 3 or 4 according to the present invention, and then the required image resolution can be realized by performing appropriate decoration or selecting the minimum number of color matching units N to be 2 according to the weight of the main colors of the original image. The selection of the primary colours also requires consideration of the type of colour yarn used to produce the thread, since the colour of the yarn cannot be fine-tuned or modified, the preferred method is to select the colour yarn that is closest to the colour that is common in the original image.

According to the color image example shown in fig. 2A, in the selection of the matched color, since the selected 4 primary colors already cover the conventional three primary colors and three bright colors, one of black and white that can sufficiently set off the contrast is selected as the matched color. In the embodiment shown in fig. 2A-2N, the selected metamerism for blue and red is white, while the selected metamerism for green and yellow is black. In the actual knitting process, when the yarn selection unit 1101 is configured such that the blue main color yarn is disposed on the upper surface of the fabric, this means that the matching color yarn, i.e., the white yarn, is disposed on the lower surface of the fabric at the same position. Those skilled in the art will appreciate that the finished product after knitting has opposite sides with the same image but opposite colors.

The ability of the human eye to recognize images is affected by viewing distance. Under a specific viewing distance, the undersized image outline on the textile cannot be recognized by naked eyes. Therefore, the method of the present invention needs to determine the digital image limit distance, i.e. the maximum distance between the viewer and the digital image, according to the assumed distance between the viewer and the digital image, i.e. the preferred viewing distance. An observer who is at a distance from the image beyond the limit distance of the digital image may have difficulty in recognizing the fine contours in the woven image, i.e., may not appreciate the resolution that the picture is expected to exhibit with the naked eye of an ordinary person.

Then, the minimum number of display units s can be determined according to the parameters such as the width W of the digital image to be woven, the target horizontal resolution L set for the digital image, the limit distance of the digital image and the like. The knitwear produced by the circular knitting device has the knitting circumference length, and the width W of the digital image can be thought of as the width of the circular knitting finished product after being cut open, namely the knitting circumference length before being cut open. In brief, assuming a target horizontal resolution L of 1000, if a digital image is to be rendered in a knitted product having a width of 2 meters, then theoretically each pixel width along the horizontal direction should be about 2 centimeters. Depending on the nature of the selected knitted fabric, 2 cm may be about 6 stitches apart. If the 2m knitted product is to be hung in a small display room for visitors to stand at a position of 1-2 m to view images, a person can easily view every detail displayed on the image even standing at a position of 2m from the image, and therefore, the minimum number of display units s is selected to be 6. However, if the 2m knitted product is hung in an open exhibition space and the operator wants the visitors of the exhibition space to stand 3-5 m away from the digital image to view the image, the digital image with each pixel having a width of 2 cm cannot be clearly recognized by the naked eyes of the ordinary person from 5 m away. It must be considered at this time to increase the basic width of the pixels to, for example, about 4 cm, and to choose a minimum number of display elements s equal to 12, depending on the nature of the knitted fabric described above.

If the digital image is realized by means of knitting, the minimum number of display units s mentioned above may correspond to the minimum number of knitting units m. A typical digitized image is composed of an array of pixels, each individual pixel being configured to represent a set color through a combination of digitization of a primary color. In order to make the original image be able to be presented by circular knitting, the finished image to be knitted needs to be a similar pixel array. After the minimum number of color matching units N is determined, the number of longitudinal units K of the finished image to be knitted, i.e. the number of rows in the pixel array of the digitized image calculated in the vertical direction, can be estimated from the height of the longitudinal axis of the image and the height of the single-layer knitting of the knitting technique used. In the embodiment shown in fig. 2A to 2N, the minimum number of color matching units N is 4, and if the single-layer knitting height of the knitted fabric knitted by the selected circular knitting apparatus is 0.5 cm, it is understood that the size of the knitted pixel unit should be at least 2 cm or an integral multiple of 2 cm. For example, if the height of the finished image to be woven is expected to be 80 cm, the number of longitudinal elements K should be 400. The selection of the value of the vertical unit number K for various applications can be deduced by those skilled in the art according to the concept.

In order to achieve the desired horizontal resolution, the number of L vertical straight lines that divide the finished image to be woven into the same horizontal resolution may be selected. The number of L may also be selected while taking into account the selected number of vertical cells K value so that each pixel shape on the digital image is not too long or too flat. Through the above steps, the predetermined finished image should be like an array of L × K pixel positions as shown in fig. 1C. Next, the original image can be parsed according to the concept of such a pixel array.

Referring to FIGS. 1C/1D, FIG. 1C shows a schematic diagram of a pixel array; FIG. 1D is a schematic diagram of a full-color pixel array formed by combining sets of 4 primary colors according to the embodiment shown in FIGS. 2A-2N. Those skilled in the art can understand that a color pixel array as shown in fig. 1C can be obtained by means of color analysis, and determining the shade or shade relationship of each primary color at the corresponding position according to the component of each primary color in each pixel, so as to finally form a pixel array representing each primary color. The embodiment shown in fig. 2A-2N is used to perform color analysis with 4 primary colors such as blue (B), red (R), green (G), yellow (Y), and the like, so as to obtain pixel arrays or dot array combinations of 4 primary colors. The color analysis method may be to filter the original image by using the transparent filters of 4 primary colors such as blue (B), red (R), green (G), and yellow (Y), or may be to obtain the same pixel array or point array combination of 4 primary colors by performing color analysis on the digitized original image on a computer by using a software program.

For any single position in the pixel array or dot array of a single primary color, there is only a light and dark or light fraction of the primary color. The simplest way to digitize the difference between these light and dark states is to distinguish between the two states, light and dark. Therefore, according to an embodiment of the present invention, a specific cell in the pixel array or the dot array of each primary color can be represented digitally as a binary 0 or 1 to indicate or dim. The pixel array or dot array of 4 primary colors such as blue (B), red (R), green (G), yellow (Y) after two-bit concept digitization becomes a digital array of 0 or 1, which can be transmitted through various communication or electronic media. When the yarn selecting unit of the circular knitting device can be designed to be configured according to the electronic control signal so as to knit the primary colors or the matched colors to the front surface of the knitwear, the layer pixels of the full-color pixel array of the original image are realized after the knitting of the primary colors and the matched colors is finished on each horizontal layer in sequence. When the K layers of pixels of the full-color pixel array of the original image are woven in sequence, a colorful original image can be realized on the front surface of the knitwear.

Fig. 2B-2E are color-resolved filtered images of 4 primary colors, such as blue, red, green, and yellow, respectively, of the original image shown in fig. 2A. If a conventional transparent filter is used to filter a common color photograph, the obtained filtered image will be a monochrome image in analog form, and in order to obtain a digitized image and make the knitting equipment capable of knitting the image, it is necessary to convert each primary color filtered image into an L × K pixel position array as shown in fig. 1C. When each position in the array is classified as either light or dark according to the threshold, a dot array image of 4 primary colors such as blue, red, green, yellow, etc. as shown in fig. 2F-2I can be generated. For ease of illustration, the dot matrix images shown in FIGS. 2F-2I have primary colors and corresponding contrast colors, and in practice the apparatus and method of the present invention need only result in black and white dot matrix images as shown in FIGS. 2J-2M, where black dots represent dark colors and white dots represent light colors.

Taking blue as an example, the companion color used in this embodiment is white, blue is a relatively dark color and white is a light color, so the black dots in FIG. 2J indicate that the blue colored yarns will appear on the front side of the fabric and the white colored yarns will appear on the back side of the fabric. The white dots in fig. 2J indicate that the blue colored yarn will appear on the reverse side of the fabric and the white colored yarn will appear on the face side of the fabric. Further taking yellow as an example, the color of the color used in this embodiment is black, black is a relatively dark color and yellow is a light color, so the black dots in FIG. 2M indicate that at the locations black yarns will appear on the front side of the fabric and yellow yarns will appear on the back side of the fabric. The white dots in fig. 2M indicate that black yarns will appear on the reverse side of the fabric and yellow yarns will appear on the face side of the fabric at the locations.

Returning to fig. 1B, the horizontal layer 211 at the upper left of the figure has predetermined

knitting positions

2111, 2112, 2113, etc. in sequence, similarly, the horizontal layer 212 has predetermined

knitting positions

2121, 2122, 2123, etc. in sequence, the horizontal layer 213 has predetermined

knitting positions

2131, 2132, 2133, etc. in sequence, and the horizontal layer 214 has predetermined

knitting positions

2141, 2142, 2143, etc. in sequence, and so on.

According to the simplest concept, a group of 4 predetermined knitting positions adjacent up and down includes predetermined knitting positions of one primary color, and one basic full-color pixel can be formed. According to another embodiment, 8 or more predetermined weaving positions adjacent up and down may be combined into one full-color pixel. According to the above, in addition to the required resolution, the minimum number of display units s or the minimum number of knitting units m should be considered, so that the color and contour of the image displayed by knitting can be clearly recognized by naked eyes. If the minimum number of knitting units M determined after calculation is 3, a single point appearing at the same horizontal position or two points appearing in succession in the black and white dot array image shown in 2J-2M must be merged by successive black or white dots at adjacent positions. Briefly, the shading of any corresponding segment of the digital image is adjusted to be consistent with the shading of its neighboring pixels according to a specific principle. After the above adjustment, the black and white dot array image shown in 2J-2M does not have continuous black dots or white dots smaller than the minimum knitting unit number M on the same horizontal line.

According to one embodiment, the

predetermined weaving positions

2112, 2122, 2132, 2142 in FIG. 1B may constitute pixels, with the boundaries shown in dashed lines being the boundaries of default pixel positions before adjustment and the boundaries shown in solid lines being the boundaries of default pixel positions after adjustment. The adjusted widths of the

predetermined weaving positions

2112, 2142, 2212, 2232 are shown as different from those before the adjustment because of the combination and adjusted results described above. Due to the adjustment, the invention can realize the image with rich gradation and high resolution through the knitting technology, and the outline of the finished product can be clearly appreciated and recognized by naked eyes within a proper distance.

In the above embodiment, for convenience of description, after the matched color is selected for each primary color, the corresponding point array image of each primary color is introduced. Those skilled in the art will appreciate that the above steps may be reversed, i.e., the dot array image of each primary color is generated and adjusted first, and the color blending is determined for each primary color. Such a practice is not beyond the scope of the present invention.

After the above steps are completed, the circular knitting device can be used to knit a fabric having the original image according to the L × K digital pixel array with a color yarn configuration of an appropriate color. FIG. 2N is a schematic diagram of a color image generated according to the above embodiment. Through the above embodiment, the method provided by the invention can make each position of the woven fabric have default color by utilizing the configuration of the dyed yarns in the process of weaving the fabric, thereby avoiding the need of subsequent dyeing and finishing procedures and completely avoiding the waste liquid discharge problem caused by the dyeing and finishing procedures. In addition, the yarns used when the cloth knitted by the method provided by the invention is knitted at different parts are consistent, so the material is uniform and smooth in touch, the common thread end of the orange-red figured cloth can not appear, and the method is a great innovation of the textile technology.

Please refer to fig. 3A-3H, which are schematic diagrams illustrating another exemplary method for digitizing an original image and weaving the original image into a digital image according to the present invention. Fig. 3A is a high resolution original image, in which the lower half of the water wave generates rich color gradation difficult to realize the aesthetic feeling through the general textile dyeing and finishing technology, but can be realized through the method of the present invention by knitting.

In this embodiment, since the color of the original image has the largest area occupied by blue, the selection of the primary colors and the color matching may make blue and red be two primary colors, and the selection of yellow and black be the color matching of blue and red, respectively. The original image shown in fig. 3A can be subjected to color analysis to obtain filtered blue-yellow and red-black images shown in fig. 3B and 3C, according to a procedure similar to that of the above-described embodiment. Fig. 3D and 3E are dot array images of two primary colors with blue and red as primary colors, respectively. The dot matrix images shown in fig. 3D and 3E have primary colors and corresponding contrast colors, and the black and white dot matrix images shown in fig. 3F and 3G are matrix images adjusted according to the minimum number m of knitting units, in which black dots represent dark colors and white dots represent light colors. Blue is dark with respect to yellow and red is light with respect to black.

FIG. 3H is a schematic diagram of a color digital image produced according to the above embodiment. The superiority of the present invention can be demonstrated from the rich color hierarchy shown in the figure. Due to the minimum number of color matching units N of 2, when the original image is realized by using the circular edge knitting technology, the number of knitting pixels arranged along the knitting circumference can be large (for example, more than 1K), and the knitted image has high-resolution (HD) picture presentation.

Please refer to fig. 4A-4N, which are schematic diagrams illustrating another exemplary method for digitizing an original image and weaving the original image into a digital image according to the present invention. The original image shown in fig. 4A is the same as that shown in fig. 3A, but in this embodiment, the selection of the primary colors and the matching colors is increased to 8 groups, which are respectively white red, black yellow, white blue, white red, and yellow blue, so that the minimum number of matching units N is 8. This embodiment is intended to demonstrate the number and arrangement of the light and dark color combinations different from the previous embodiment for realizing the same original image, and is intended to design the color schemes of red, blue, yellow and black as 8 groups as one unit. Such an embodiment may make the color content of each pixel more preferably rich and full.

The original image shown in fig. 4A can be color resolved to obtain filtered white red, white blue, yellow black and yellow blue images as shown in fig. 4B-4E, with the names of the images being in the bright color first and in the dark color second, according to a procedure similar to the above embodiment. Fig. 4F to 4I are respectively schematic diagrams of dot array images of white red, white blue, yellow black and yellow blue, and fig. 4J to 4M are respectively schematic diagrams of bright and dark dot array images of white red, white blue, yellow black and yellow blue adjusted according to the minimum number of knitting units M. FIG. 4N is a schematic diagram of a color digital image produced according to the above embodiment. Those skilled in the art will appreciate that the preferred minimum number of color units N and different combinations of light and dark colors may be arranged according to different application requirements.

In the embodiment shown in fig. 4A-4N, 8 yarn selecting units are used as a group to realize color pixels, and compared with the embodiment shown in fig. 3A-3G, when the number of yarn selecting units of the circular knitting device performing knitting is not changed, the total number of pixels that can be configured in the horizontal direction of the knitted fabric of the embodiment shown in fig. 4A-4N is only one fourth of that of the embodiment shown in fig. 3A-3G. However, in most cases, even in high-quality images, the contour change in the back surface is not so variable, in other words, in most cases, it is common that a plurality of bright dots or dark dots appear continuously in the horizontal direction or the vertical direction in the primary color point array diagram obtained by color-analyzing the high-quality original image. According to practical trials, the method provided by the invention can realize high-quality images with the horizontal resolution of 4K or more and even more than 8K by using a weaving method.

In summary, the method proposed by the present invention can be summarized as the steps shown in fig. 5: a method for weaving a fabric with an image is proposed, wherein the image has a height of a longitudinal axis, the method comprising the following steps: selecting an integer N as the minimum number of color matching units (step 501); providing a circular knitting device with a plurality of yarn selecting units (step 503); sequentially combining the yarn selecting units into a plurality of yarn selecting unit combinations according to the minimum number N of the color matching units, wherein each yarn selecting unit combination is formed by N yarn selecting units, and each yarn selecting unit is configured to select one of a main color yarn and a matched color yarn with a color different from that of the main color yarn (step 505); estimating the number of longitudinal units K of the image according to the minimum number of color matching units N, the height of the longitudinal axis and the single-layer knitting height (step 507); dividing the image into L horizontal sections according to the target horizontal resolution and the number K of the vertical units of the image, and dividing the image into an array of pixel positions L × K (step 509); respectively forming N LxK dot array images corresponding to the LxK pixel position array by color analysis of the image according to N primary colors corresponding to the primary color yarns of the N yarn selecting units, wherein each dot in the N LxK dot array images is one of light and dark (step 511); determining a minimum number of knitting units m (step 513); for each of the N lxk point group images, adjusting the points having a number of continuous bright or dark points less than m along each horizontal line to be consistent with the bright-dark state of the adjacent points, thereby forming N adjusted lxk point group images (step 515); determining the selection of each of the primary colors and the blending colors for each of the pixel locations based on the array of lxk pixel locations to form an lxk digital pixel array of the image (step 517); and weaving the fabric with the image according to the L x K digital pixel array by using the circular knitting device (step 519).

According to another aspect, the method of the present invention can be summarized as the steps shown in fig. 6: a method of digitizing an original image to organize the original image into a digital image, wherein the digital image has a width W, the method comprising the steps of: selecting an integer N as the minimum number of color matching units such that the colors of the digital image are composed based on N primary colors (step 601); determining the number of vertical units K of the image according to the height of the digital image and the value N (step 603); selecting a target horizontal resolution L (step 605); constructing an array of pixels at lxk while mapping to both the original image and the digital image to be formed (step 607); determining a digital image limit distance based on the distance of the assumed viewer from the digital image (step 609); determining a minimum number of display units s based on W, L and the digital image limit distance (step 611); judging whether one of the N primary colors on the corresponding horizontal line has a section with the number of continuous bright or dark pixels less than s in the original image K value range, and adjusting the brightness of the corresponding section on the digital image to be consistent with the brightness of the adjacent pixels according to a specific principle when judging that the section exists (step 613); determining the selection of each original color and the matched color of each pixel position according to the light and shade state of each point at the corresponding position in the N LxK point array images respectively according to the LxK pixel array positions, thereby forming an LxK digital pixel array, wherein each digital pixel is formed by sequentially arranging the light colors or the dark colors along the longitudinal direction by the N groups of color pairs (step 615); and displaying the digital image in accordance with the L K array of digital pixels (step 617).

Although the preferred embodiments have been described above, it should be understood that they have been presented by way of example only, and not limitation, such variations and modifications as would be within the spirit and scope of this disclosure may occur to those skilled in the art.

Description of the symbols

110/111 yarn selecting unit combination

210/220 horizontal layer unit

211/212/213/214/221/222/223/224 horizontal layer

501/503/505/507/509/511/513/515/517/519/601/603/605/607/609/611/613/615/617 step

1101/1102/1103/1104/1111/1112/1113/1114 yarn selecting unit

1101a/1101b/1102a/1102b/1103a/1103b/1104a/1104b/1111a/1111b/1112a/1112b/1113a/1113b/1114a/1114b dyed yarn

2111-2113/2121-2123/2131-2133/2141-2143/2211-2213/2221-2223/2231-2233/2241-2243 at predetermined weaving positions

B blue

R Red

G green

Yellow colour Y

NB non-blue

NR non-Red

NG is not green

NY non-yellow

Claims

1. A method for weaving a fabric having an image, wherein the image has a height along a longitudinal axis, the method comprising the steps of:

selecting an integer N as the minimum number of color matching units;

providing a circular knitting device with a plurality of yarn selecting units;

according to the minimum number N of the color matching units, the yarn selecting units are sequentially combined into a plurality of yarn selecting unit combinations, wherein each yarn selecting unit combination is formed by N yarn selecting units, and each yarn selecting unit is configured to select one of main colored yarns and matched colored yarns with different colors from the main colored yarns;

estimating the number K of longitudinal units of the image according to the minimum number N of color matching units, the height of the longitudinal axis and the height of single-layer knitting;

dividing the image into L horizontal sections according to a target horizontal resolution and the number K of the longitudinal units of the image, and dividing the image into an array of pixel positions of L multiplied by K;

respectively forming N L multiplied by K point array images corresponding to the L multiplied by K pixel position arrays by color analysis of the images according to N primary colors corresponding to the main color yarns of the N yarn selecting units, wherein each point in the N L multiplied by K point array images is one of bright and dark;

determining a minimum number of knitting units m;

for each of the N lxk point array images, adjusting the points with the number of continuous bright or dark points less than m along each horizontal line to be consistent with the bright-dark state of the adjacent points, thereby forming N adjusted lxk point array images;

determining a selection of each of the primary colors and the blending colors for each of the pixel positions based on the array of LxK pixel positions to form an LxK digital pixel array of the image; and

weaving the fabric with the image according to the L multiplied by K digital pixel array by using the circular knitting device.

2. The method according to claim 1, wherein the circular knitting apparatus produces knitwear having a knitting circumference length, the selection of each of the primary colors and the matching colors for each of the pixel positions is determined in accordance with a shading state of each of points at corresponding positions in the N lxk point array images, respectively, and

the minimum number of knitting units m is determined according to the knitting circumference length, the target horizontal resolution and the limit knitting distance.

3. The method of claim 1, wherein each of the digital pixels in the L x K array of digital pixels includes N horizontal primary color units in the same vertical order, and each of the primary color yarns is selected from one of red, blue, yellow, black, white, and green yarns.

4. The method of claim 1, wherein the minimum number of color matching units N is one of 2 to 4 when the image is a full-color image.

5. A fabric having an image made according to circular knitting having a horizontal direction and a vertical direction and a front surface and a back surface, wherein:

the image is composed of an array of pixel units, each pixel unit basically presents a rectangular outline;

each of the pixel units includes a plurality of pairs of color yarns repeatedly arranged in the same order in the vertical direction;

each pair of dyed yarns comprises a main dyed yarn with primary color and a matched dyed yarn with matched color;

the front surface is on the same horizontal position, one of the primary colors and the matched colors belonging to the same color yarn pair appears along the horizontal direction, and the same color is continuously appeared along the horizontal direction, and the continuous knitting number s is not less than the minimum.

6. The fabric according to claim 5, wherein the fabric has a single thickness, the minimum number of consecutive knitting s is greater than 2, and for the same pair of dyed yarns, when a specific position of the front side is displayed as the primary color, the specific position of the back side displays the matching color.

7. The fabric of claim 5, wherein each of the primary colors is selected from one of black, white, red, blue, yellow, and green.

8. A method of digitizing an original image to organize the original image into a digital image, wherein the digital image has a width W, the method comprising the steps of:

selecting an integer N as the minimum number of color matching units such that the colors of the digital image are formed based on N primary colors;

determining the number K of vertical units of the image according to the height of the digital image and the value N;

selecting a target horizontal resolution L;

forming pixel arrays in L x K while mapping to the original image and the digital image to be formed;

determining a digital image limit distance based on the distance between the assumed observer and the digital image;

determining a minimum number of display elements s according to W, L and the digital image limit distance; and

and judging whether one of the N primary colors on the corresponding horizontal line has a section with the number of continuous bright or dark pixels less than s in the range of the K value of the original image, and adjusting the brightness of the corresponding section on the digital image to be consistent with the brightness of the adjacent pixels according to a specific principle when judging that the section exists.

9. The method of claim 8 wherein the step of displaying the digital image in the lxk array of digital pixels is accomplished in a circular knitting manner.

10. The method of claim 8, further comprising:

according to the pixel array positions of the L multiplied by K, the selection of each original color and the matched color of each pixel position is determined according to the light and shade states of each point at the corresponding position in the N pixel array images of the L multiplied by K respectively, so that an L multiplied by K digital pixel array is formed, wherein each digital pixel is formed by sequentially arranging the light colors or the dark colors along the longitudinal direction by the N groups of color pairs; and

and displaying the digital image according to the L multiplied by K digital pixel array.