Design method of wood grain cover plate texture

Abstract

The application discloses a design method for wood grain cover plate texture, belonging to the field of automobile cover plates, aiming to solve the demand for hidden display products in the vehicle market. The method converts wood grain patterns into screen printing screens, enabling the display screen to present a wood grain effect that blends with the interior decoration in the off-screen state, while ensuring that information can be clearly displayed in the on-screen state. The design method includes the design of two-color and multi-color wood grain patterns, as well as the design of reverse wood grain effects, and can flexibly adjust the gray threshold to adapt to the color saturation of different original wood grain effect pictures. The technical scheme of the application can effectively realize the dual functions of decoration effect in the off-screen state and information display in the on-screen state, improve the beauty and practicality of the display screen, and meet the market demand for high-quality hidden display products.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wood grain cover plate design and processing, and particularly relates to a design method of wood grain cover plate texture. BACKGROUND

[0002] With the development trend of automotive interior design, more and more vehicles use integrated display screens to replace traditional physical buttons to improve the technological and aesthetic sense of the cockpit. However, when these display screens are in the off-screen state, they often present a single color or pattern, which is not coordinated with the overall decoration style of the vehicle interior, affecting the overall beauty of the cockpit. In order to overcome this problem, a new type of hidden display technology has appeared on the market, which requires the display screen to present a specific decorative effect, such as a wood grain pattern, in the off-screen state, so that the display screen can blend into the decorative environment of the vehicle interior, while in the lit state, it can clearly display information. However, there is no mature solution on the market that can simultaneously meet the requirements of both the decorative effect in the off-screen state and the information display in the lit state.

[0003] In summary, the technical problem to be solved by the present application is that the prior art can only display a single color or a simple pattern in the off-screen state, and cannot simulate a real wood grain effect, resulting in low integration with other decorative materials in the vehicle interior. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a design method of wood grain cover plate texture, which can clearly display the picture displayed on the screen in the lit state, and the display screen can present a wood grain effect consistent with the vehicle interior decoration in the off-screen state, improving the overall aesthetics and coordination.

[0005] To solve the above technical problems, the technical solution adopted by the present application is:

[0006] A design method of wood grain cover plate texture, comprising the following working conditions:

[0007] Working condition one: when processing a two-color wood grain cover plate, the steps are as follows:

[0008] Step A1, any picture form of color or black and white wood grain effect picture is subjected to grayscale processing, so that the color image is converted into a black and white tone different grayscale picture;

[0009] Step A2, each pixel in the grayscale picture has a grayscale value, and the grayscale value ranges from 0 to 255; a grayscale value of 0 represents a pure black color, and a grayscale value of 255 represents a pure white color;

[0010] Step A3, for simple two-color wood grain cover plate, set the gray value threshold h1 according to the lightness of the required wood grain picture texture; define the pixel points with ≤h1 gray value as black points, and define the pixel points with >h1 gray value as white points;

[0011] The simple two-color wood grain cover plate has two colors of wood grain color and base color;

[0012] Step A4, define the black area as the ink deposit point of the wood grain color ink, and define the white area as the ink deposit point of the non-wood grain color ink. And convert it into an effect picture to obtain a texture effect picture composed of single-pixel black points and white points;

[0013] Step A5, determine whether the wood grain effect needs to be deepened or lightened according to the texture effect picture;

[0014] If the wood grain effect needs to be deepened, increase the gray value threshold;

[0015] If the wood grain effect needs to be lightened, decrease the gray value threshold;

[0016] Step A6, due to the limited precision of screen printing, the wood grain effect is printed with 80lpi dot number; according to the texture effect picture converted by the above steps A1-A2, the size of a single-pixel black point in the texture effect picture is <87μm; therefore, the black pixel points in the texture effect picture need to be enlarged, and the diameter of a single-pixel black point is enlarged to between 87μm and 317.5μm; the smaller the diameter, the higher the image precision, and the larger the diameter, the easier the screen printing;

[0017] Step A7, make the picture of the enlarged black pixel points into a wood grain screen Y1, and simultaneously make a whole base color screen printing screen Y2, so as to perform wood grain cover plate screen printing. The wood grain screen Y1 is used for screen printing the wood grain color, and the base color screen A2 is used for whole screen printing of the base color. Thus, a two-color wood grain cover plate is obtained.

[0018] Working condition two: when processing a three-color wood grain cover plate, the steps are as follows:

[0019] Step B1, convert an arbitrary picture form of color or black and white wood grain effect picture into a different gray scale picture by gray scale processing, so as to convert the color image into a black and white tone;

[0020] Step B2, each pixel point in the gray scale processed picture has a gray value, and the gray value range is 0-255; the gray value of 0 represents pure black color, and the gray value of 255 represents pure white color;

[0021] Step B3, for three-color wood grain cover plate, only two gray threshold values, h2 and h3, are defined, wherein h2 < h3. Points with a gray value ≤ h2 are inked points of wood grain color two, points with a gray value from h2 (not included) to h3 (included) are inked points of wood grain color three, and points with a gray value > h3 are white points without wood grain color;

[0022] The three-color wood grain cover plate comprises two wood grain colors and one base color.

[0023] Step B4, pixel points with a gray value ≤ h2 are screened out, and screen plate making is performed by using the methods of steps A6 and A7 to obtain a wood grain screen plate Z1.

[0024] Step B5, pixel points with a gray value from h2 to h3 are screened out, and screen plate making is performed by using the methods of steps A6 and A7 to obtain a wood grain screen plate Z2. Alternatively, all pixel points with a gray value ≤ h3 are screened out, and screen plate making is performed by using the methods of steps A6 and A7 to obtain a wood grain screen plate Z3. At this time, the screen plate three comprises the patterns of the screen plate two, and a color-overlaid pattern is obtained. A full-surface base color screen printing screen plate Z4 is synchronously made.

[0025] Step B6, wood grain color two is screen printed by using the wood grain screen plate Z1, wood grain color three is screen printed by using the wood grain screen plate Z2, and a full-surface base color is screen printed by using the base color screen plate Z4 to obtain a three-color wood grain cover plate.

[0026] Alternatively, wood grain color two is screen printed by using the wood grain screen plate Z1, wood grain color three is screen printed by using the wood grain screen plate Z3, and a full-surface base color is screen printed by using the base color screen plate Z4 to obtain a three-color color-overlaid wood grain cover plate.

[0027] Step B7, if it is necessary to further increase the color type, only the gray threshold value needs to be increased. By setting x gray threshold value separation points, an x-color wood grain effect picture can be obtained, which is matched with a full-surface base color screen plate to make an x+1 color wood grain cover plate.

[0028] Working condition three: the design steps of a reverse wood grain effect picture are as follows:

[0029] Since the color of part of the wood grain original picture is light, the overall color is white after the original picture is grayed, that is, the white non-inked points are too many. Even if the gray threshold value is increased, the overall color is still white. In this case, the gray values corresponding to the inked points and the non-inked points can be exchanged. Table 1 shows the correspondence between the gray values and the inked points.

[0030] Table 1: Correspondence between gray values and inked points

[0031]

[0032] After the inked points and the non-inked points are exchanged, the colors of the final effect picture and the original picture are complementary. The dark color region of the original picture corresponds to the white color region of the effect picture, and the light color region of the original picture corresponds to the black color region of the effect picture.

[0033] The present application can achieve the following beneficial effects:

[0034] The present application proposes a hidden display product currently demanded in the vehicle-mounted market, i.e., the display screen presents a wood grain effect in the screen-off state, and the wood grain effect can be integrated with the interior decoration of the vehicle. In the screen-on state, the screen can clearly display the picture displayed on the screen. In the screen-off state, the display screen can present a wood grain effect consistent with the interior decoration of the vehicle, improving the overall aesthetics and coordination. The screen can be completely invisible when the screen is off, integrated with the surrounding environment, increasing the sense of seniority and design of the cockpit. BRIEF DESCRIPTION OF DRAWINGS

[0035] The present application will be further described below in combination with the drawings and embodiments:

[0036] Figure 1 The present application is a wood grain effect original picture;

[0037] Figure 2 The present application is a wood grain original picture after gray scale processing;

[0038] Figure 3 The present application is a partial enlarged pixel effect picture after gray scale processing;

[0039] Figure 4 The present application is a black and white dot texture effect picture;

[0040] Figure 5 The present application is a wood grain texture after deepening effect picture. DETAILED DESCRIPTION

[0041] The preferred scheme is as shown in the figure, a wood grain cover plate texture design method, comprising the following working conditions: Figures 1 to 5

[0042] I. Ink transfer and non-ink transfer area design of double-color wood grain pattern

[0043] The specific design steps of the double-color wood grain effect are as follows:

[0044] 1-5 are the method of converting a physical picture to a gray scale picture, and 6-7 are the method of converting a gray scale picture to a screen printing picture.

[0045] 1. The color or black and white wood grain effect picture in any picture form is subjected to gray scale processing, so that the color picture is converted into a black and white picture with different gray scales.

[0046] 2. Each pixel point in the picture after gray scale processing has a gray scale value, and the gray scale value ranges from 0 to 255. A gray scale value of 0 represents a pure black color, and a gray scale value of 255 represents a pure white color.

[0047] ​③For simple two-color (wood grain color and background color) wood grain cover plate, set a certain gray value threshold according to the lightness of the required wood grain picture texture. For example, define the pixel points with a gray value of ≤170 as black points and the pixel points with a gray value of >170 as white points;

[0048] ④Define the black area as the ink deposit point of the wood grain color ink and the white area as the non-deposit point, and convert it into an effect picture to obtain a texture composed of single-pixel black points and white points Figure 1 .

[0049] ⑤Determine whether the wood grain effect needs to be deepened or lightened according to the effect picture. If the wood grain effect needs to be deepened, increase the gray value threshold, for example, from 170 to 190 gray values. Then the pixels in the original 170-190 gray value range will change from white non-deposit points to black deposit points, at which time the printing area increases and the wood grain effect is deepened. If the wood grain effect needs to be lightened, the opposite is also true.

[0050] ⑥Due to the limited precision of screen printing, the wood grain effect is generally printed using 80lpi dots (converted to picture pixels as 80ppi). That is, the size of a single deposit point is about 25.4mm / 80=317.5μm. Currently, a 27μm diameter 420 mesh screen is used for screen printing, and the theoretical size of a single deposit hole is about 25.4*1000μm / 420+27μm=87μm. According to the texture converted by the above ①-⑤, Figure 1 , the size of a black point in a single pixel of the texture Figure 1 is <87μm. If the texture Figure 1 is directly converted into a screen pattern, the size of the deposit point will be <87μm, which will cause the ink to be unable to pass through the deposit hole during actual screen printing. Therefore, the black pixel points in the texture Figure 1 need to be enlarged. In this embodiment, the size of a single pixel point is actually enlarged to 200μm, taking into account the printability and wood grain effect.

[0051] ⑦The picture paper after the pixel points are enlarged ( Figure 4 ) is made into a wood grain screen pattern, and wood grain cover plate screen printing can be performed. The black point area is inked, and the wood grain effect ink is screen printed; then the whole surface background screen is screen printed with the whole surface background color, and a two-color wood grain cover plate is obtained.

[0052] Ink deposit and non-deposit area design of two- and three-color wood grain patterns

[0053] The ink deposit and non-deposit area design of a three-color wood grain pattern is similar to that of a two-color wood grain effect. Specifically as follows:

[0054] ⑧The conversion of the wood grain original picture is described in the two-color wood grain effect design method ①-②;

[0055] 9. For three-color wood grain effect, only two gray scale thresholds, for example, 120 and 150, need to be defined. The points with ≤120 gray scale values are inked points of wood grain color 2, the points with 120~150 (inclusive) gray scale values are inked points of wood grain color 3, and the points with >150 gray scale values are white points without ink.

[0056] 10. The pixel points with ≤120 gray scale values are screened out, and the screen plate is made by using steps 6 and 7 to obtain a wood grain screen plate 2.

[0057] 11. The pixel points with 120~150 (inclusive) gray scale values are screened out, and the screen plate is made by using steps 6 and 7 to obtain a wood grain screen plate 3. Alternatively, all the pixel points with ≤150 gray scale values are screened out, and the screen plate is made by using steps 6 and 7 to obtain a wood grain screen plate 3, which contains the pattern of the wood grain screen plate 2, thereby obtaining a superimposed color pattern.

[0058] 12. The wood grain color 2 is printed by using the wood grain screen plate 2, the wood grain color 3 is printed by using the wood grain screen plate 3, and the whole surface base color is printed by using the whole surface base color screen plate, thereby obtaining a three-color wood grain cover plate.

[0059] III. Design of an effect pattern of a reverse wood grain

[0060] Due to the fact that the color of some wood grain original patterns is relatively light, the overall color of the original pattern after gray scale conversion is relatively white, i.e., the white points without ink are relatively many. Even if the gray scale threshold is increased, the overall color is still relatively white. In this case, the gray scale values corresponding to the inked points and the non-inked points can be adjusted. For example, as shown in Table 1.

[0061] Table 1. Relationship between gray scale and inked points

[0062]

[0063] After the inked points and the non-inked points are adjusted, the color of the final effect pattern and the original pattern is complementary. The dark color region of the original pattern corresponds to the white color region of the effect pattern, and the light color region of the original pattern corresponds to the black color region of the effect pattern.

[0064] During the design of the pattern of the wood grain cover plate, due to the difference in color saturation of different original wood grain effect patterns, the gray scale thresholds listed above are only used for describing the design method, and the gray scale thresholds need to be adjusted according to the effect during the actual design.

[0065] The above-described embodiments are only preferred technical solutions of the present application, and should not be regarded as limiting the present application. The protection scope of the present application should be the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this range are also within the protection scope of the present application.

Claims

1. A method for designing a wood grain cover texture, characterized in that The following working conditions are included: Working condition 1: When processing a two-color wood grain cover, the steps are as follows: Step A1: grayscale any color or black and white wood grain effect image, so that the color image is converted into different grayscale images of black and white tones; Step A2: In the grayscaled image, each pixel has a grayscale value ranging from 0 to 255. A grayscale value of 0 represents pure black, and a grayscale value of 255 represents pure white. Step A3: For a simple two-color wood grain cover, set a grayscale threshold h1 according to the required depth of the wood grain image; define pixels with a grayscale value ≤ h1 as black, and define pixels with a grayscale value > h1 as white; The simple two-color wood grain cover plate has two colors: wood grain color and base color; Step A4: define the black area as the ink placement point for the wood grain color ink, and define the white area as the ink placement point for the non-wood grain color ink; And convert it into an effect map to get a texture effect map composed of black and white dots of a single pixel; Step A5: Determine whether to deepen or lighten the wood grain effect based on the texture rendering; To deepen the wood grain effect, increase the grayscale value threshold; If you need to reduce the wood grain effect, lower the grayscale threshold; Step A6: Due to the limited precision of screen printing, the wood grain effect is printed using an 80 lpi dot count. After converting the texture effect image according to steps A1-A2 above, the black dot size of a single pixel in the texture effect image is less than 87 μm. Therefore, the black pixels in the texture effect image need to be enlarged, and the diameter of a single black pixel is enlarged to between 87 μm and 317.5 μm. The smaller the diameter, the higher the image precision, and the larger the diameter, the easier it is to screen print. Step A7: The black pixel image is enlarged to form a wood grain screen Y1, and a full-surface base color screen Y2 is simultaneously produced to perform wood grain cover screen printing. The wood grain screen Y1 is used to screen print the wood grain color, and the base color screen Y2 is used to screen print the base color on the entire surface; thus, a two-color wood grain cover plate can be obtained.

2. The method for designing a wood grain cover board texture according to claim 1, characterized in that: Working condition 2: When processing three-color wood grain cover board, the steps are as follows: Step B1: grayscale any color or black and white wood grain effect image, so that the color image is converted into different grayscale images of black and white tones; Step B2: In the grayscaled image, each pixel has a grayscale value ranging from 0 to 255. A grayscale value of 0 represents pure black, and a grayscale value of 255 represents pure white. Step B3: For a three-color woodgrain cover, only two grayscale thresholds need to be defined, namely h2 and h3, where h2 < h3. Points with grayscale values ​​≤ h2 are the ink-down points for woodgrain color two, points with grayscale values ​​between h2 and h3 are the ink-down points for woodgrain color three, and points with grayscale values ​​> h3 are white points that are not printed with the woodgrain color. The three-color wood grain cover plate includes two wood grain colors and one base color; Step B4: Filter out pixels with grayscale values ​​≤ h2, and use the methods of steps A6 and A7 to make a screen to obtain a wood grain screen Z1; Step B5: Filter out pixels with grayscale values ​​between h2 and h3, and use the methods of steps A6 and A7 to create a screen, obtaining wood grain screen Z2. Alternatively, filter out all pixels with grayscale values ​​≤ h3, and use the methods of steps A6 and A7 to create a screen, obtaining wood grain screen Z3. In this case, screen three includes the pattern of screen two, resulting in a double-color pattern. Simultaneously, create screen Z4 for full-surface background printing. Step B6: Screen-print wood grain color 2 through wood grain screen Z1, screen-print wood grain color 3 through wood grain screen Z2, and screen-print the entire surface of the base color through base color screen Z4 to obtain a three-color wood grain cover plate; Alternatively, wood grain color 2 is screen printed through wood grain screen Z1, wood grain color 3 is screen printed through wood grain screen Z3, and the entire surface of the base color is screen printed through base color screen Z4 to obtain a three-color stacked wood grain cover plate; Step B7: If you need to further increase the number of colors, you only need to increase the grayscale threshold; set x grayscale threshold separation points to obtain an x-color wood grain effect image, and match it with the entire base color screen to produce an x+1-color wood grain cover.

3. The method for designing a wood grain cover board texture according to claim 1, characterized in that: Working condition 3: The design steps for the reverse wood grain effect diagram are as follows: Since the color of some of the original wood grain images is relatively light, the overall color of the original image after grayscale conversion is relatively white, that is, there are too many white non-ink dots. Even if the grayscale threshold is increased, if the overall color is still relatively white, the grayscale values ​​corresponding to the ink dots and the non-ink dots are swapped; as shown in Table 1: Table 1 Correspondence between grayscale and ink dots After swapping the ink dots and the non-ink dots, the final effect image and the original image have complementary colors; the dark areas of the original image correspond to the white areas of the effect image; the light areas of the original image correspond to the black areas of the effect image.

Images