Design method for grain of wood grain cover plate

Abstract

The invention discloses a design method of wood grain cover plate grains, belongs to the field of automobile cover plates, and aims to meet the requirements of a vehicle-mounted market on hidden display products. According to the method, the wood grain pattern is converted into the screen layout capable of being used for silk-screen printing, the display screen shows the wood grain effect fused with interior decoration in the screen-off state, and meanwhile it is guaranteed that information can be clearly displayed in the light-on state. The design method comprises the design of double-color and multi-color wood grain patterns and the design of the inverse-color wood grain effect, and the gray threshold can be flexibly adjusted to adapt to the color saturation of different original wood grain effect pictures. According to the technical scheme, the double functions of the decoration effect when the screen is turned off and the information display when the screen is turned on can be effectively achieved, the attractiveness and practicability of the display screen are improved, and the requirements of the market for high-quality hidden display products are met.

Description

Technical Field

[0001] The invention belongs to the technical field of wood grain cover plate design and processing, and particularly relates to a design method for the texture of a wood grain cover plate. Background Art

[0002] With the development trend of automobile interior design, more and more vehicles are using integrated display screens to replace traditional physical buttons to enhance the sense of technology and aesthetics of the cockpit. However, when these displays are off, they often show a single color or pattern, which is inconsistent with the overall decorative style of the vehicle interior, affecting the overall aesthetics of the cockpit. In order to overcome this problem, a new type of hidden display technology has emerged on the market. This technology requires the display screen to present a specific decorative effect when the screen is off, such as a wood grain pattern, so that the display screen can be integrated into the decorative environment of the car, and can clearly display information when it is lit. However, there is currently no mature solution on the market that can meet both the requirements of decorative effects when the screen is off and information display when it is lit.

[0003] In summary, the technical problem to be solved by the present invention is that the prior art can only display a single color or a simple pattern when the screen is off, cannot simulate the real wood grain effect, and has a low degree of integration with other decorative materials in the car. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a design method for a wood grain cover plate texture, which can clearly display the picture displayed on the screen when the screen is on; when the screen is off, the display screen can present a wood grain effect consistent with the interior decoration of the car, thereby improving the overall aesthetics and coordination.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A design method for a wood grain cover texture includes the following working conditions: 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, and the grayscale value range is 0-255; when the grayscale value is 0, it means the color here is pure black, and when the grayscale value is 255, it means the color here is pure white; Step A3: For a simple two-color wood grain cover plate, a gray value threshold h1 is set according to the required depth of the wood grain image texture; pixels with a gray value ≤ h1 are defined as black points, and pixels with a gray value > h1 are defined as white points; 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 point of the wood grain color ink, and the white area as the ink point of the non-wood grain color ink. Convert it into an effect picture to obtain a texture effect picture composed of black dots and white dots of a single pixel; Step A5: Determine whether the wood grain effect needs to be deepened or lightened according to the texture effect diagram; To deepen the wood grain effect, increase the gray value threshold; If you need to reduce the wood grain effect, lower the gray value threshold; Step A6, due to the limited precision of screen printing, the wood grain effect is printed with 80lpi dots; the pixel density of the texture effect image converted according to the above steps A1-A2 is much higher than 80ppi, that is, the size of a black dot of a pixel in the texture effect image is less than 87μm; therefore, it is necessary to enlarge the black pixel points in the texture effect image, and the diameter of a single black pixel is enlarged to between 87μm and 317.5μm; 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 enlarged image is made into wood grain screen Y1, and the whole surface background color screen Y2 is made simultaneously, and the wood grain cover plate can be screen printed. The wood grain screen Y1 is used for screen printing wood grain color, and the background color screen A2 is used for screen printing the whole surface background color. A two-color wood grain cover plate can be obtained.

[0006] Working condition 2: When processing three-color wood grain cover plate, the steps are as follows: Step B1, grayscale the color or black and white wood grain effect picture in any picture form, so that the color image is converted into different grayscale pictures of black and white tones; Step B2: In the grayscaled image, each pixel has a grayscale value, and the grayscale value range is 0-255; when the grayscale value is 0, it means the color here is pure black, and when the grayscale value is 255, it means the color here is pure white; Step B3: For three-color wood grain cover, only two grayscale thresholds need to be defined, namely h2 and h3, where h2<h3. Points with grayscale values ​​≤h2 are the ink points of wood grain color 2, points with grayscale values ​​h2 (not included) ~ h3 (included) are the ink points of wood grain color 3, and points with grayscale values ​​>h3 are white points that are not printed with wood grain color; The three-color wood grain cover plate includes two wood grain colors and one base color; Step B4, filter out pixel points 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 the pixels with grayscale values ​​of h2~h3, and use the methods of steps A6 and A7 to make a screen to obtain a wood grain screen Z2; you can also filter out all the pixels with grayscale values ​​≤h3, and use the methods of steps A6 and A7 to make a screen to obtain a wood grain screen Z3, at which time screen three contains the pattern of screen two to obtain a superimposed color pattern. Simultaneously make the entire base color screen printing screen Z4; 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 background color through background color screen Z4 to obtain a three-color wood grain cover plate; at the same time, screen print wood grain color 2 through wood grain screen Z1, screen print wood grain color 3 through wood grain screen Z3, and screen print the entire surface background color through background color screen Z4 to obtain a three-color stacked wood grain cover plate.

[0007] Step B7: If you need to further increase the number of colors, you only need to increase the grayscale threshold; by setting x grayscale threshold separation points, you can get an x-color wood grain effect image, and with the entire base color screen, you can make an x+1-color wood grain cover.

[0008] Working condition 3: The design steps of the reverse color wood grain effect map are as follows: Since the color of some wood grain original images is lighter, the overall color of the original image after grayscale conversion is whiter, that is, there are more white non-ink dots; even if the grayscale threshold is increased, if the overall color is still white, the grayscale values ​​corresponding to the ink dots and the non-ink dots can be swapped; as shown in Table 1: Table 1 Correspondence between grayscale and ink dots

[0009] After swapping the ink dots and the non-ink dots, the final effect image and the original image are complementary in color; the dark area of ​​the original image corresponds to the white area of ​​the effect image; the light area of ​​the original image corresponds to the black area of ​​the effect image.

[0010] The present invention can achieve the following beneficial effects: The present invention proposes a hidden display product that meets the current automotive market demand, that is, the display screen presents a wood grain effect when the screen is off, and this wood grain effect can be integrated with the interior decoration of the car. When the screen is on, the picture displayed on the screen can be clearly displayed. When the screen is off, the display screen can present a wood grain effect consistent with the interior decoration of the car, which improves the overall aesthetics and coordination. The screen can be completely invisible when the screen is off, blending into the surrounding environment, increasing the sense of luxury and design of the cockpit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is the original picture of the wood grain effect of the present invention; Figure 2This is the effect diagram of the original wood grain image after grayscale conversion; Figure 3 This is a pixel effect diagram of a local magnified image after grayscale conversion in the present invention; Figure 4 This is the black and white dot texture effect diagram of the present invention; Figure 5 This is a picture showing the effect of deepening the wood grain texture of the present invention. DETAILED DESCRIPTION

[0012] The preferred solution is Figures 1 to 5 As shown, a design method for a wood grain cover texture includes the following working conditions: 1. Design of ink and non-ink areas for two-color wood grain patterns The specific design steps for the two-color wood grain effect are as follows: ①-⑤ are methods for converting physical images to grayscale images, and ⑥-⑦ are methods for converting grayscale images to screen images.

[0013] ① For any color or black and white wood grain effect picture in the form of an image, grayscale processing is performed on it to convert the color image into different grayscale pictures in black and white tones.

[0014] ② In the grayscale image, each pixel has a grayscale value, and its grayscale value range is 0-255. When the grayscale value is 0, it means the color here is pure black, and when the grayscale value is 255, it means the color here is pure white; ③ For simple two-color (wood grain color and base color) wood grain cover. According to the required depth of the wood grain image texture, set a certain gray value threshold. For example, with a gray value of 170 as the boundary, define the pixel points with a gray value of ≤170 as black points, and define the pixel points with a gray value of >170 as white; ④ Define the black area as the ink point of the wood grain color ink, and the white area as the non-ink point. Convert it into a rendering to get a texture composed of black and white dots of a single pixel. Figure 1 .

[0015] ⑤ Determine whether to deepen or lighten the wood grain effect according to the effect diagram. If you want to deepen the wood grain effect, you can increase the grayscale value threshold, for example, from 170 to 190 grayscale value. Then the pixels in the original 170-190 grayscale range will change from white non-inking dots to black ink-ing dots. At this time, the printing area increases and the wood grain effect deepens. If you need to lighten the wood grain effect, vice versa. ⑥Due to the limited precision of screen printing, wood grain effect is generally printed with 80lpi dots (converted to 80ppi for image pixels). That is, the size of a single ink dot is about 25.4mm / 80=317.5μm. The current screen printing screen uses a 27-micron wire diameter 420 mesh screen. The theoretical size of a single ink hole is about 25.4*1000μm / 420+27μm=87μm. According to the texture converted from ① to ⑤ above Figure 1 , its pixel density is much higher than 80ppi, that is, texture Figure 1 The black dot size of a pixel is less than 87μm. Figure 1 When converted into a screen image, the screen made will have a dot size of less than 87μm, which will result in the ink not being able to pass through the ink holes during actual screen printing. Figure 1 The black pixel is enlarged. In this embodiment, the size of a single pixel is actually enlarged to 200 μm, taking into account both printability and wood grain effect.

[0016] ⑦ The drawing after enlarging the pixels ( Figure 4 ) to make a wood grain screen pattern, and then you can do the wood grain cover screen printing. Ink the black spot area, and then print the wood grain effect ink; then use the whole surface base color screen to print the whole surface base color, and you can get a two-color wood grain cover.

[0017] 2. Design of ink and non-ink areas for three-color wood grain patterns: The design of the ink and non-ink areas of the three-color wood grain pattern is similar to the two-color wood grain effect design. The details are as follows: ⑧For the transformation of the original wood grain pattern, please refer to the two-color wood grain effect design method ①-②; ⑨ For the three-color wood grain effect, you only need to define two grayscale thresholds, such as 120 and 150. Points with grayscale values ​​≤120 are inking points for wood grain color 2, points with grayscale values ​​between 120 and 150 (inclusive) are inking points for wood grain color 3, and points with grayscale values ​​>150 are white points that do not ink.

[0018] ⑩ Filter out the pixels with grayscale values ​​≤ 120, and use steps ⑥⑦ to make a screen to obtain a wood grain screen 2; ⑪ Filter out the pixels with grayscale values ​​of 120 to 150 (inclusive), and use steps ⑥⑦ to make a screen to obtain wood grain screen 3. You can also filter out all the pixels with grayscale values ​​≤ 150, and use steps ⑥⑦ to make a screen to obtain wood grain screen 3. In this case, screen 3 contains the pattern of screen 2, and a superimposed color pattern is obtained.

[0019] ⑫ Screen-print wood grain color 2 through wood grain screen 2, screen-print wood grain color 3 through wood grain screen 3, and then use the entire surface base color screen to screen-print the entire surface base color to obtain a three-color wood grain cover.

[0020] 3. Design of reverse color wood grain effect picture: Since the color of some wood grain original images is lighter, the overall color of the original image after grayscale conversion is whiter, that is, there are more white non-inking dots. Even if the grayscale threshold is increased, if the overall color is still whiter, the grayscale values ​​corresponding to the ink dots and the non-inking dots can be swapped. As described in Table 1; Table 1 Correspondence between grayscale and ink dots

[0021] After swapping the ink dots and the non-ink dots, the final effect image and the original image are complementary in color. 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.

[0022] During the design process of the wood grain cover drawing, due to the difference in color saturation of different original wood grain renderings, the grayscale threshold listed above is only used to describe the design method. In the actual design process, the grayscale threshold needs to be adjusted according to the effect.

[0023] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A method for designing a wood grain cover board texture, characterized in that The following 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 picture, so that the color image is converted into different grayscale pictures of black and white tones; Step A2: In the grayscaled image, each pixel has a grayscale value, and the grayscale value range is 0-255; when the grayscale value is 0, it means the color here is pure black, and when the grayscale value is 255, it means the color here is pure white; Step A3: For a simple two-color wood grain cover plate, a gray value threshold h1 is set according to the required depth of the wood grain image texture; pixels with a gray value ≤ h1 are defined as black points, and pixels with a gray value > h1 are defined as white points; The simple two-color wood grain cover plate has two colors: wood grain color and base color; Step A4, defining the black area as the ink placement point of the wood grain color ink, and the white area as the ink placement point of the non-wood grain color ink; And convert it into an effect map to obtain a texture effect map composed of black and white dots of a single pixel; Step A5: Determine whether the wood grain effect needs to be deepened or lightened according to the texture effect diagram; To deepen the wood grain effect, increase the gray value threshold; If you need to reduce the wood grain effect, lower the gray value threshold; Step A6, due to the limited precision of screen printing, the wood grain effect is printed with 80lpi dots; the pixel density of the texture effect image converted according to the above steps A1-A2 is much higher than 80ppi, that is, the size of a black dot of a pixel in the texture effect image is less than 87μm; therefore, it is necessary to enlarge the black pixel points in the texture effect image, and the diameter of a single black pixel is enlarged to between 87μm and 317.5μm; 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 enlarged image is made into a wood grain screen plate Y1, and the whole-surface base color screen printing screen plate Y2 is simultaneously made, and the wood grain cover plate can be screen printed; The wood grain screen Y1 is used for silk-screening the wood grain color, and the base color screen Y2 is used for silk-screening 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 plate, the steps are as follows: Step B1, grayscale the color or black and white wood grain effect picture in any picture form, so that the color image is converted into different grayscale pictures of black and white tones; Step B2: In the grayscaled image, each pixel has a grayscale value, and the grayscale value range is 0-255; when the grayscale value is 0, it means the color here is pure black, and when the grayscale value is 255, it means the color here is pure white; Step B3, for the three-color wood grain cover plate, only two grayscale thresholds need to be defined, namely h2 and h3, where h2<h3; among them, the points with grayscale values ​​≤h2 are the ink points of wood grain color two, the points with grayscale values ​​h2 (excluding) ~ h3 (including) are the ink points of wood grain color three, and the points with grayscale values ​​>h3 are white points that are not screen-printed with wood grain color; The three-color wood grain cover plate includes two wood grain colors and one base color; Step B4, filter out pixel points 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 the pixel points with grayscale values ​​of h2 to h3, and use the methods of steps A6 and A7 to make a screen to obtain a wood grain screen Z2; or filter out all the pixel points with grayscale values ​​≤ h3, and use the methods of steps A6 and A7 to make a screen to obtain a wood grain screen Z3, in which screen three includes the pattern of screen two to obtain a superimposed color pattern; and simultaneously make a full-surface background color screen printing screen Z4; Step B6, screen printing wood grain color 2 through wood grain screen Z1, screen printing wood grain color 3 through wood grain screen Z2, and screen printing the entire surface of the background color through the background color screen Z4, so as to obtain a three-color wood grain cover plate; at the same time, screen printing wood grain color 2 through wood grain screen Z1, screen printing wood grain color 3 through wood grain screen Z3, and screen printing the entire surface of the background color through the background color screen Z4, so as 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; by setting x grayscale threshold separation points, you can get an x-color wood grain effect image, and with the entire base color screen, you can make 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 of the reverse color wood grain effect map are as follows: Since the color of some wood grain original images is lighter, the overall color of the original image after grayscale conversion is whiter, that is, there are more white non-ink dots; even if the grayscale threshold is increased, if the overall color is still white, the grayscale values ​​corresponding to the ink dots and the non-ink dots can be swapped; as shown in Table 1: Table 1 Correspondence between grayscale and lower ink dots After swapping the ink dots and the non-ink dots, the final effect image and the original image are complementary in color; the dark area of ​​the original image corresponds to the white area of ​​the effect image; the light area of ​​the original image corresponds to the black area of ​​the effect image.

Images