Color continuous-tone image reproduction method and system based on laser-induced micro-nano structure

Abstract

The application discloses a color continuous-tone image method and system based on laser-induced micro-nano structures, and belongs to the field of micro-nano structure manufacturing, and comprises the following steps: performing line-by-line traversal on each pixel in a color continuous-tone image, obtaining primary color proportions and mapping to a coloring position map; based on spectral energy information of each color in the color continuous-tone image, determining basic weights of each color in the coloring position map through spectral energy normalization; utilizing the allocation relationship of the color proportions of each pixel, dynamically adjusting the basic weights to obtain a new allocation relationship, and outputting the color continuous-tone image; inputting the color continuous-tone image into a laser device, generating micro-nano structures on the surface of a base material, and reproducing the color continuous-tone image. According to the application, the weights are dynamically adjusted according to the color proportions of the pixels, the continuity of the color tone and the tone level is improved, the laser-induced micro-nano structures reproduce the complex color continuous-tone image on the surface of stainless steel, and more abundant color types and color tone levels are achieved.

Description

Technical Field

[0001] This invention belongs to the field of micro-nano structure manufacturing, specifically relating to a method and system for reproducing color continuous tone images based on laser-induced micro-nano structures. Background Technology

[0002] Laser coloring technology is a high-precision, high-efficiency surface treatment technique that has been widely applied in the field of materials processing in recent years. By controlling parameters such as power, pulse width, and scanning speed, the laser beam can precisely deliver laser energy to the microscopic areas of the material surface, altering the microstructure or chemical composition of the material. These changes lead to variations in the material's absorption, reflection, and scattering properties of light, resulting in different colors or patterns. It has wide applications in color printing, precious metal decoration, display imaging, and consumer electronics. Current research on laser coloring focuses primarily on color preparation, mainly generating colored patterns, and tone reproduction is mainly achieved through laser parameter adjustments. However, achieving color changes through laser parameter adjustments faces several challenges. Simply changing laser parameters makes it difficult to achieve continuous changes in hue and tone. Although some theoretical analyses and discussions have been conducted on the effects of laser modulation parameters such as power, frequency, pulse width, scanning speed, and fill distance on the brightness and chromaticity of colors, it is difficult to obtain arbitrary colors within the target color gamut, and no method for generating continuous-tone color images has yet been developed.

[0003] Therefore, it is necessary to design a method and system for reproducing color continuous tone images based on laser-induced micro / nano structures to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a method and system for reproducing color continuous tone images based on laser-induced micro / nano structures. By proposing an adaptive primary color allocation method based on spectral energy information and color ratio and laser-induced micro / nano structures, the continuity of hue and tone is improved. Compared with the color patterns generated by traditional laser coloring technology, the color patterns achieve a richer variety of colors and hue levels, and complex color continuous tone images are successfully reproduced on the substrate surface.

[0005] According to one aspect of this specification, a method for reproducing color continuous-tone images based on laser-induced micro / nano structures is provided, comprising:

[0006] The obtained color continuous tone image is traversed line by line to obtain the primary color ratio required for each pixel position in the color continuous tone image, and the primary color ratio is mapped to the color position map.

[0007] Based on the spectral energy information of each color in the color continuous tone image, the basic weight of each color in the color location map is determined by spectral energy normalization;

[0008] By using the color ratio of each pixel, the basic weight of each color is dynamically adjusted to obtain the updated weight of each color;

[0009] The update weight of each color is combined with the color ratio of each pixel to obtain a new color ratio for each pixel, and the new color ratio is mapped to a shading location map, which is then converted to form a color continuous tone image in vector format.

[0010] A vector-formatted color continuous-tone image is input into a laser device, and a micro-nano structure is generated on the surface of a substrate by a laser beam, thus reproducing the color continuous-tone image.

[0011] Furthermore, before performing the line-by-line traversal, it also includes performing an affine transformation on the input color continuous-tone image.

[0012] Furthermore, the base weights for each color are dynamically adjusted, including:

[0013] By utilizing the color ratio of each pixel and combining it with spectral energy information, the inverse of the base weight of each color is multiplied by the ratio of each color within a pixel, and then added to the base weight of each color to obtain the updated weight of each color.

[0014] Further, the conversion of the color position map into a vector-format color continuous-tone image includes:

[0015] By converting each small square in the color location map into a closed vector line segment, each closed vector line segment constitutes a color continuous tone image in vector format.

[0016] Furthermore, affine transformations are performed, including:

[0017] Control the displacement and rotation of pixels in a color continuous tone image to tilt the image and adjust pixel allocation.

[0018] According to one aspect of this specification, a color continuous-tone image reproduction system based on laser-induced micro / nano structures is provided, comprising:

[0019] The mapping module is used to perform a line-by-line traversal based on the acquired color continuous tone image to obtain the primary color ratio required for each pixel position in the color continuous tone image, and to map the primary color ratio to the color position map;

[0020] The normalization module is used to determine the basic weight of each color in the color location map by normalizing the spectral energy information of each color in the color continuous tone image.

[0021] The weight update module is used to dynamically adjust the base weight of each color using the color ratio of each pixel, so as to obtain the updated weight of each color.

[0022] The output module is used to combine the updated weight of each color with the color ratio of each pixel to obtain a new color ratio for each pixel, and to map the new color ratio to a color position map, which is then converted to form a color continuous tone image in vector format.

[0023] The reproduction module is used to input a vector-formatted color continuous-tone image into a laser device, and generate micro-nano structures on the surface of a substrate using a laser beam to reproduce the color continuous-tone image.

[0024] According to one aspect of this specification, an electronic device is provided, including a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to implement the steps of the laser-induced micro / nano structure-based color continuous-tone image reproduction method.

[0025] According to one aspect of this specification, a computer-readable storage medium is provided having a computer program stored thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of creating a color continuous-tone image based on a laser-induced micro / nano structure.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. This invention proposes an adaptive primary color allocation method based on spectral energy information and color ratio. The basic weight is dynamically adjusted according to the color ratio of the pixel, which improves the continuity of hue and tone, ensures that the color ratio of each pixel is adapted to the needs of complex images, and successfully reproduces complex color continuous tone images on the substrate surface.

[0028] 2. This invention proposes a laser-induced micro / nano structure, which has significant advantages in color reproduction, detail expression, and image layer representation. Compared with traditional laser coloring technology, the color patterns generated achieve a richer variety of colors and tonal levels, providing technical support and theoretical basis for the reproduction of complex images in related fields. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1This is a flowchart of a color continuous tone image reproduction method based on laser-induced micro / nano structures according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of a laser-induced micro / nano structure according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of image affine transformation according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the allocation of primary colors in the coloring position diagram based on color mixing in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of pixel color allocation in a color image according to an embodiment of the present invention;

[0035] Figure 6 This is a color continuous tone image of a stainless steel surface in an embodiment of the present invention. Detailed Implementation

[0036] The problems addressed by this invention in existing technologies are mainly reflected in the following aspects: First, when achieving color changes by adjusting laser parameters (such as power, frequency, pulse width, etc.), it is difficult to achieve continuous changes in hue and tone, limiting the diversity and fine control of colors; second, existing research mostly focuses on the generation of simple patterns, with a limited range of colors and difficulties in tone control; third, for pixel-by-pixel color reproduction of complex images, there is still a lack of effective theoretical support and practical methods. Therefore, a new method is urgently needed to overcome these limitations and achieve high-quality, delicate tone and rich hue reproduction of complex color images, providing a new theoretical foundation and technical path for the application of laser coloring technology in multi-color image reproduction.

[0037] The aforementioned technical problems are mainly solved by the following technical solutions of the present invention:

[0038] This invention provides a method for reproducing color continuous-tone images based on laser-induced micro / nano structures. It employs an adaptive primary color ratio allocation method based on spectral energy information and color proportions. Utilizing the spectral energy characteristics of eight solid colors, basic weight parameters are determined through spectral energy normalization, ensuring that the weights of each color channel accurately reflect their spectral contributions. Based on these basic weights, a dynamic weight adjustment strategy based on primary color proportions is further proposed, allowing for real-time weight updates at the pixel level according to the specific color proportions of each pixel, meeting the accuracy requirements of tonal gradation and color reproduction in complex images.

[0039] This invention aggregates individual color points to improve color reproduction. Utilizing the linear processing path characteristics of lasers, the original single-point processing path is replaced with a processing path composed of long line segments. This adjustment allows more color points to aggregate along the path, thereby enhancing color saturation and expressiveness. It achieves a more continuous and uniform color transition, thus reproducing any color image by forming aggregated primary colors. Color is modulated by the density changes of these aggregated primary colors. A color position map of primary color rendering units corresponding to different primary color ratios is created. The input continuous-tone image is traversed row by row, mapping the required primary color ratio for each pixel position to the corresponding color position map. When generating the output image, the color and tone of each pixel determine the number of primary colors to be obtained from the color position map. Based on the current output pixel position, the corresponding primary color position is found in the color position map, and this primary color is copied to the corresponding pixel in the output image, thus marking the required primary colors on the final image. Output images with different primary colors are input into a laser coloring device to generate various color continuous-tone images on the substrate surface.

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention provides a method for reproducing color continuous-tone images based on laser-induced micro / nano structures, such as... Figure 1 As shown, the process includes: traversing line by line of a color continuous-tone image input to a computer to obtain the required primary color ratio for each pixel in the color continuous-tone image, and mapping the primary color ratio to a coloring position map; determining the basic weight of each color in the coloring position map based on the spectral energy information of each color in the color continuous-tone image through spectral energy normalization; dynamically adjusting the basic weight of each color using the color ratio of each pixel to obtain the updated weight of each color; combining the updated weight of each color with the color ratio of each pixel to obtain the new color ratio of each pixel, and mapping the new color ratio to the coloring position map, wherein the coloring position map is converted to form a vector-format color continuous-tone image; inputting the vector-format color continuous-tone image into a laser coloring device, and generating micro / nano structures on the substrate surface with a laser beam according to the set laser parameters to reproduce the color continuous-tone image.

[0042] Specifically, such as Figure 2As shown in the diagram, this embodiment of the invention provides a schematic diagram of a laser-induced micro / nano structure. After setting the processing area and laser parameters, the computer sends a control signal to the pulsed fiber laser to output laser light. This laser light is adjusted by a beam expander and collimator to ensure uniform beam distribution and consistent direction before illuminating the X and Y axis mirrors of the galvanometer, achieving beam deflection. The beam is then focused onto the stainless steel surface by an F-theta lens. The laser beam forms multiple overlapping portions within a 50-micrometer area to generate primary color units, where each primary color unit represents the smallest color generation area. Figure 2 The square area on the stainless steel surface in the image represents the basic unit of an image pixel.

[0043] Specifically, embodiments of the present invention also provide a method for generating color continuous-tone images based on laser-induced micro / nano structures. This method performs an affine transformation on the input image, maintaining one axis constant while linearly shifting points along another direction to achieve an image tilting effect. The image is then transferred from... Figure 3 (a) Transformed to Figure 3 (b) In two-dimensional space, the affine transformation can be expressed as:

[0044] (1)

[0045] in, These are the coordinates of the image pixels before they changed. These are the coordinates after the affine transformation. , , , These are the parameters of the affine transformation matrix. , It is the translation amount.

[0046] To create a tilted image, let the clipping angle be... An affine matrix can be represented as:

[0047] (2)

[0048] The first column of the matrix determines how the horizontal coordinate (x-coordinate) of a point in the image changes. Observing the matrix, it can be seen that the transformation in the horizontal direction (i.e., the x-direction) is controlled by the first column. The first row element 1: This value determines the scaling ratio in the horizontal direction; a value of 1 indicates that the horizontal coordinate does not scale or change, meaning the x-coordinate of each point in the image remains unchanged. The second row element... The shear angle determines how the vertical direction (y-coordinate) adjusts according to changes in the horizontal coordinate (x-coordinate). The change in the vertical direction is directly proportional to the change in the horizontal coordinate; the larger the angle, the greater the inclination of the vertical direction. This determines the strength of the transformation. A positive shear angle will tilt the image to the right, while a negative shear angle will tilt the image to the left.

[0049] The second column of the matrix determines how the vertical coordinate (y) of a point in the image changes. The first row, element 0: The vertical coordinate (y) does not affect the horizontal coordinate (x), meaning that a transformation in the vertical direction will not cause the point to shift horizontally. The second row, element 1: Under the influence of the horizontal coordinate (x), the point's y-coordinate will change according to the shearing angle.

[0050] The transformation formula for each pixel is:

[0051] (3)

[0052] in, These are the coordinates of the image pixels before they changed. These are the coordinates of the transformed pixels. According to formula (3), the pixel positions in the horizontal direction remain unchanged. The pixel positions in the vertical direction will change. The farther away from the left boundary of the image (the larger x is), the greater the vertical offset of the image. This transformation does not change the properties of the straight lines formed by multiple pixels in the original image. The straight lines before the transformation remain straight lines after the transformation, and parallel lines in the image remain parallel after the transformation.

[0053] Specifically, embodiments of the present invention also investigate a method for constructing a colorimetric location map of primary color rendering units for generating mixed colors. A colorimetric location map based on mixed colors can be generated using aggregated primary colors distributed laterally, where each aggregated primary color line is associated with a specified color. Instead of pre-compiling a colorimetric location map lookup table containing every color combination across all possible area coverage regions, this study synthesizes multiple primary color combination maps by repeatedly accessing the colorimetric location map of a single color rendering unit created for each color. In the improved color processing strategy, a hierarchical color filling method is employed, which incrementally increases the color coverage in stages to ensure that each layer of color is accurately displayed according to the target coverage, achieving visual color fusion. This method mainly utilizes the ordered superposition of color layers and the corresponding adjustment of the rendering unit positions to control the representation of each color in the pixel, making the final image more accurate and coherent in color expression. An example of the primary color allocation used to generate mixed colors is shown below. Figure 4 As shown, the specific implementation steps are as follows:

[0054] 1. Achieving Total Coverage. In the initial steps, the total coverage of all colors is calculated; for example, cyan 30%, magenta 40%, and yellow 20%, totaling 90%. A monochrome element matching the 90% coverage is generated in the monochrome color unit coloring location map, and this element is assigned color 1, such as... Figure 4 As shown in (a), the yellow element in the diagram represents the position of the three primary colors in the coloring position diagram of the monochrome coloring unit after the proportions of the three primary colors are added together. These elements serve as the basis for subsequent adjustments.

[0055] 2. Layer-by-layer color adjustment. On the color position map of the monochromatic color unit formed by color 1, overlay layers of color 2 (cyan) and color 3 (magenta) to achieve a total coverage of 70%. This step is not done by subtracting the cyan coverage, but by directly overlaying a monochromatic element corresponding to 70% on top of the existing 90% coverage. The color of the monochromatic area to be filled is assigned to color 2. The newly appearing color position is where magenta is located, ensuring that magenta's individual coverage is 40%. Figure 4 As shown in (b), the total proportion of cyan and magenta is calculated, and the base color positions are assigned in the base color rendering unit coloring position diagram used to generate the mixed color. The newly appearing color 2 is represented by magenta in the diagram. Then, a separate 30% coverage of cyan is added to the 70% base. Thus, each step adds a new color layer based on the previous step. The newly added color is assigned color 3, as shown in (b). Figure 4 As shown in (c), the newly emerging color 3 is represented by cyan. The final arrangement and quantity of the three primary colors are distributed in the coloring position diagram of the primary color rendering units used to generate the mixed color according to the target coverage.

[0056] 3. The final image is constructed layer by layer by directly overlaying color coverage onto the existing image in each step. Each color is processed by adding a new color coverage directly to the previous color layer, and color combination and optimization are achieved through continuous layering operations. Each filling step is based on the result of the previous step, ensuring the accuracy and continuity of color coverage. The coverage of each primary color is allocated through multiple overlays; there are N primary colors, each represented by a different color. , ,…, This represents the coverage of each primary color. The calculations related to the primary color coverage are as follows:

[0057] (4)

[0058] The current output image is colored using N primary colors. It is the corresponding monochrome coverage in the monochrome coloring unit coloring position map, that is, the operation takes into account the number of monochrome colors and their positions. Figure 4 A pixel color assignment map for a color image. Figure 3 (a) is the input image. Scan each pixel of the input image line by line to obtain the color information of each pixel. Figure 3 (b) is the affine transformation image of the input image. Figure 5(a) is a color image generated according to the method of constructing the color position map of the primary color rendering unit. It is composed of three primary colors: cyan, magenta, and yellow, as well as the secondary colors produced by their mixing, and black and white. The horizontal and vertical lengths of the color position map library used are both 6, and the mixed colors of each pixel are formed by layering them according to the rules. Figure 5 (b) is a magnified view of the black-framed area, showing the location and quantity of aggregated primary colors.

[0059] This invention also provides a method for allocating the primary colors in a color continuous-tone image, using the Newtenberg equation to calculate the mixed colors in multicolor printing. The basic formula is as follows:

[0060] (5)

[0061] Where N is the number of color channels. It is the spectral reflectance of each color. It is the proportion coefficient of this color. It is the spectral reflectance of the pixel mixed color.

[0062] Specifically, the pixel color ratio distribution in the Newjeb equation is as follows:

[0063] (6)

[0064] Equation (6) allocates the proportions of each color within a pixel based on eight colors: cyan, magenta, yellow, red, green, blue, black, and white. Each of these represents the proportion of one pixel for each of the eight colors.

[0065] Specifically, to optimize the proportion coefficients of each color, the spectral energy information of eight colors is incorporated into the color proportion calculation. Simultaneously, an adaptive primary color proportion allocation method based on spectral energy information and color proportions is used to ensure that the output color proportions better conform to spectral physical properties. For each color i, its 100% real spectral reflectance is calculated. Energy across the entire visible light spectrum:

[0066] (7)

[0067] in, This represents the total spectral energy of color i. and It refers to the wavelength range for spectral measurements.

[0068] Specifically, the basic weights are determined by normalizing the spectral energy. The calculated spectral energy is normalized so that the sum of all basic weights is 1, as shown in the following formula:

[0069] (8)

[0070] in, E represents the spectral energy of the i-th color. j It represents the sum of the energies of all colors in the spectrum. Indicates the first The proportion of the spectral energy of a single color to the sum of the spectral energies of all colors.

[0071] The spectral energy information is incorporated into the weight update formula, and the weights are dynamically adjusted based on changes in the proportion of cyan, magenta, and yellow. The dynamic weight update formula is as follows:

[0072] (9)

[0073] in, Each color represents a proportion within a single pixel. The weight of each color.

[0074] The final color proportions within a single pixel are represented as follows:

[0075] (10)

[0076] in, Each of these represents the proportion of one pixel for each of the eight colors. It is the proportion coefficient of that color.

[0077] Specifically, the coloring position map is used to assign the order in which each color appears. The coloring position map is composed of small squares, each of which is converted into a closed vector line segment. The final large vector image is input into the computer control terminal of the laser coloring equipment, which then drives the equipment to generate a color continuous tone image on the stainless steel surface.

[0078] Specifically, embodiments of the present invention also provide a color continuous-tone image effect, generating a color image on a stainless steel surface using laser-induced micro / nano structures. Utilizing the adaptive primary color ratio allocation method based on spectral energy information and color ratio proposed in this paper, a color continuous-tone image is reproduced using seven primary colors and the base stainless steel color. For example... Figure 6 As shown in (a), the colorful image of a street graffiti wall was successfully reproduced on a stainless steel surface. The image as a whole depicts rich street elements with distinct details. The building outline on the left is clear, and the structure of the building, such as walls and windows, is accurately rendered through laser coloring in different shades. As can be seen in the image, yellow, red, and blue elements intertwine, showcasing the intricate lines and patterns on the graffiti wall. On the right side of the image, leaf-shaped decorations are delicately reproduced through highly saturated lines. Smooth color transitions are achieved in different areas of the graffiti wall, especially in larger color blocks, where the colors are uniform and consistent, without any obvious jagged edges or uneven transitions. Figure 6 (b) shows a scene of a street fruit stand with a large pile of fruit, mainly red and orange with a small amount of green. The fruit has a strong sense of color layering, and the wood grain details of the stand are also well represented. The transition between colors is natural, especially in the pile of fruit, where the transition between red and orange appears very smooth. Figure 6 (c) shows a hamburger, clearly displaying the different ingredients in its layers. The colors of the ingredients in each layer of the hamburger are distinct, and the colors of the ingredients are realistically reproduced, especially the green of the vegetables and the reddish-brown of the meat. Figure 6 (d) shows a portrait of a short-haired woman. The facial features are relatively clear, the short hair is dark brown, the details in the eyebrow and eye area are rich, and the eyes are prominent, showing a clear outline. The background is yellow with a regularly arranged grid texture. Especially in the transition between the face and the background, the details are distinct and layered.

[0079] Specifically, through Figure 6 The four images demonstrate that the aggregation of adjacent primary color units significantly enhances the overall color saturation. Whether it's the bright areas of the graffiti wall or the color details of the fruit stand, both brightness and contrast are effectively improved. Precise laser path control preserves details in complex images; in the hamburger image, the different layers and textures of the ingredients are accurately reproduced. In the portrait, subtle variations in facial contours, hairstyles, and shadows are also accurately handled. Subtle brushstrokes, color variations, and structural layers are clearly presented, showcasing the delicacy and precision in processing complex images and demonstrating its wide applicability and superiority in various application scenarios.

[0080] The implementation of the various embodiments of the present invention is based on programmed processing by a device with processor functionality. Therefore, in practical engineering, the technical solutions and functions of the various embodiments of the present invention are encapsulated into various modules. Based on this reality, and building upon the above embodiments, the embodiments of the present invention provide a color continuous-tone image reconstruction system based on laser-induced micro / nano structures. This system is used to execute a color continuous-tone image reconstruction method based on laser-induced micro / nano structures from the above method embodiments.

[0081] The system includes: a mapping module, used to perform line-by-line traversal of the acquired color continuous-tone image to obtain the required primary color ratio for each pixel position in the color continuous-tone image, and map the primary color ratio to a color position map; a normalization module, used to determine the basic weight of each color in the color position map by normalizing the spectral energy information of each color in the color continuous-tone image; an update weight module, used to dynamically adjust the basic weight of each color using the color ratio of each pixel to obtain the updated weight of each color; an output module, used to combine the updated weight of each color with the color ratio of each pixel to obtain the new color ratio of each pixel, and map the new color ratio to the color position map, wherein the color position map is converted to form a vector format color continuous-tone image; and a reproduction module, used to input the vector format color continuous-tone image into a laser device, and generate micro-nano structures on the surface of a substrate through a laser beam to reproduce the color continuous-tone image.

[0082] The color continuous tone image reproduction system based on laser-induced micro / nano structures provided in this invention addresses the problem of difficulty in achieving continuous changes in hue and tone in existing systems. It employs several modules and an adaptive primary color allocation method based on spectral energy information and color ratios. The system dynamically adjusts the basic weights according to the color ratio of the current pixel, thereby improving the continuity of hue and tone and achieving a richer variety of colors and hue levels.

[0083] Based on the same inventive concept as the foregoing embodiments, this embodiment of the invention also provides an electronic device, including a memory and a processor. The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to realize a color continuous tone image reproduction method based on laser-induced micro / nano structures as proposed in the above embodiments.

[0084] This invention also provides a computer-readable storage medium storing a computer program. When executed by a processor, this program overcomes the challenges of limited color gradations, difficulty in tone control, and pixel-by-pixel color reproduction of complex images, improving the continuity of hue and tone, and successfully reproducing complex color continuous-tone images on a stainless steel surface. This storage medium can be any non-volatile storage device such as a hard disk, solid-state drive, flash drive, or optical disk, used to store computer program code and necessary data files. The stored computer program includes: a mapping module, a normalization module, a weight update module, an output module, and a reproduction module.

[0085] Finally, it should be noted that the above specific embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above specific embodiments and many variations are possible. Any simple modifications, equivalent changes, and alterations made to the above specific embodiments based on the technical essence of the present invention should be considered within the protection scope of the present invention.

Claims

1. A method for reproducing color continuous-tone images based on laser-induced micro / nano structures, characterized in that, include: The obtained color continuous tone image is traversed line by line to obtain the primary color ratio required for each pixel position in the color continuous tone image, and the primary color ratio is mapped to the color position map. Based on the spectral energy information of each color in the color continuous tone image, the basic weight of each color in the color location map is determined by spectral energy normalization; By using the color ratio of each pixel, the basic weight of each color is dynamically adjusted to obtain the updated weight of each color; The base weight of each color is dynamically adjusted, including: By utilizing the color ratio of each pixel and combining it with spectral energy information, the inverse of the base weight of each color is multiplied by the ratio of each color within a pixel, and then added to the base weight of each color to obtain the updated weight of each color. The update weight of each color is combined with the color ratio of each pixel to obtain a new color ratio for each pixel, and the new color ratio is mapped to a shading location map. The shading location map is then converted to form a vector-formatted color continuous-tone image. The conversion of the shading location map to form a vector-formatted color continuous-tone image includes: By converting each small square in the color location map into a closed vector line segment, each closed vector line segment constitutes a color continuous tone image in vector format; A vector-formatted color continuous-tone image is input into a laser device, and a micro-nano structure is generated on the surface of a substrate by a laser beam, thus reproducing the color continuous-tone image.

2. The method for reproducing color continuous-tone images based on laser-induced micro / nano structures according to claim 1, characterized in that, Before performing the line-by-line traversal, the process also includes performing an affine transformation on the input color continuous-tone image.

3. The method for reproducing color continuous-tone images based on laser-induced micro / nano structures according to claim 2, characterized in that, Affine transformations include: Control the displacement and rotation of pixels in a color continuous tone image to tilt the image and adjust pixel allocation.

4. A color continuous-tone image reproduction system based on laser-induced micro / nano structures, characterized in that, The method for reproducing color continuous-tone images based on laser-induced micro / nano structures according to any one of claims 1-3 includes: The mapping module is used to perform a line-by-line traversal based on the acquired color continuous tone image to obtain the primary color ratio required for each pixel position in the color continuous tone image, and to map the primary color ratio to the color position map; The normalization module is used to determine the basic weight of each color in the color location map by normalizing the spectral energy information of each color in the color continuous tone image. The weight update module is used to dynamically adjust the base weight of each color using the color ratio of each pixel, so as to obtain the updated weight of each color. The output module is used to combine the updated weight of each color with the color ratio of each pixel to obtain a new color ratio for each pixel, and to map the new color ratio to a color position map, which is then converted to form a color continuous tone image in vector format. The reproduction module is used to input a vector-formatted color continuous-tone image into a laser device, and generate micro-nano structures on the surface of a substrate using a laser beam to reproduce the color continuous-tone image.

5. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the color continuous tone image reproduction method based on laser-induced micro / nano structures as described in any one of claims 1 to 3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the color continuous tone image reproduction method based on laser-induced micro / nano structures as described in any one of claims 1 to 3.

Images