Three-dimensional scene display method based on holographic projection

Abstract

The invention relates to the technical field of three-dimensional model analysis, and discloses a holographic projection-based three-dimensional scene display method, which comprises the following steps: preparing quantum dots through a chemical solution method or a physical vapor deposition method, selecting a quantum dot material with good stability, preparing the quantum dots with uniform size and light-emitting wavelength in a visible light range, and displaying the quantum dots in a holographic projection mode. The light propagation model is corrected according to the light emitting characteristics of the quantum dots, hologram data corresponding to the three-dimensional cube model are calculated, and projection is carried out according to the hologram data; based on a projection image generated after correction of the light propagation model, acquiring quality data of the projection image in real time through an image sensor, analyzing the data according to a preset algorithm, and judging whether the projection system needs to be adjusted and different signals need to be generated; and based on the obtained color optimization signal and the clear optimization signal, obtaining characteristic data of the corresponding quantum dots, analyzing and adjusting the material characteristics and the application mode of the quantum dots, and enhancing the display effect of the projected image.

Description

Technical Field

[0001] The present invention relates to the technical field of three-dimensional model analysis, and in particular to a three-dimensional scene display method based on holographic projection. Background Art

[0002] With the development of science and technology, people have higher and higher requirements for display technology. Traditional two-dimensional display technology can no longer meet people's needs for immersive visual experience. Holographic projection technology, as a technology that can realize three-dimensional scene display, has received widespread attention. However, the existing holographic projection technology has some shortcomings, including but not limited to low image resolution, less than ideal color reproduction, and limited viewing angle range, which limit the further application of holographic projection technology in fields such as virtual reality, augmented reality, and high-end display. It is impossible to ensure the purity and brightness of colors, and it is impossible to collect quality data and preset algorithms in real time to respond and adjust to enhance the display effect of the projected image.

[0003] To this end, the present invention provides a three-dimensional scene display method based on holographic projection. Summary of the invention

[0004] The object of the present invention is to provide a three-dimensional scene display method based on holographic projection to solve at least one of the above-mentioned problems in the prior art.

[0005] In a first aspect, the present invention provides a three-dimensional scene display method based on holographic projection, which specifically comprises the following steps:

[0006] Prepare quantum dots by chemical solution method or physical vapor deposition method, select quantum dot materials with high luminous efficiency, narrow emission spectrum and good stability, prepare quantum dots with uniform size and luminous wavelength within the visible light range, modify the light propagation model according to the luminous characteristics of quantum dots, calculate the hologram data corresponding to the three-dimensional cube model and project according to the hologram data;

[0007] Based on the projection image generated after the correction of the light propagation model, the quality data of the projection image is collected in real time through the image sensor, and the quality data includes but is not limited to the color characteristic value and the clarity characteristic value. The data is analyzed according to the preset algorithm to determine whether the projection system needs to be adjusted and generate different signals;

[0008] Based on the different signals obtained, the characteristic data of the corresponding quantum dots are obtained, and the material properties and application methods of the quantum dots are analyzed and adjusted.

[0009] In a second aspect, the present invention provides a three-dimensional scene display method based on holographic projection, which specifically includes the following modules:

[0010] Projection module: including but not limited to light source, quantum dot light conversion module, spatial light modulator and projection lens, preparing quantum dots by chemical solution method or physical vapor deposition method, selecting quantum dot materials with high luminous efficiency, narrow emission spectrum and good stability, preparing quantum dots with uniform size and luminous wavelength within the visible light range, and projecting according to hologram data;

[0011] Model data analysis module: According to the luminescence characteristics of quantum dots, the light propagation model is modified to calculate the hologram data corresponding to the three-dimensional cube model;

[0012] Projection image data acquisition module: Based on the projection image generated after the correction of the light propagation model, the quality data of the projection image is collected in real time through the image sensor. The quality data includes but is not limited to color feature values ​​and clarity feature values;

[0013] Projection image data analysis module: Analyzes data based on a preset algorithm to determine whether the projection system needs to be adjusted;

[0014] Projection data adjustment module: based on the color optimization signal and the clarity optimization signal, obtain the characteristic data of the corresponding quantum dots, analyze and adjust the material characteristics and application methods of the quantum dots;

[0015] The beneficial effects of the present invention are:

[0016] 1. By converting the RGB color space to the CIELAB color space, which is closer to human visual perception, the CIELAB color space can accurately analyze color features, help detect color deviations, and ensure the color accuracy of the projected image; by calculating the average brightness and average saturation, the overall brightness and color intensity of the image can be quantified; by calculating the grayscale difference, contrast and its difference ratio, as well as information entropy, the clarity of the image can be effectively evaluated; by comparing the color feature value, clarity feature value and the preset threshold, it can be determined whether the projection system needs to be adjusted;

[0017] 2. Optimize the primary colors such as red, green, and blue by adjusting the size of quantum dots, and precisely control the wavelength of the emitted light by synthesizing quantum dots of a specific size to ensure color purity and brightness; adjust the size and concentration of quantum dots according to the color optimization signal to correct the image color; improve the clarity of the projected image by improving the uniformity of the size distribution of quantum dots; respond and adjust based on real-time collected quality data and preset algorithms to enhance the display effect of the projected image. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is an operation flow chart of a three-dimensional scene display method based on holographic projection provided in Embodiment 1 of the present invention;

[0020] Figure 2 is a flowchart of a three-dimensional scene display method based on holographic projection provided in Example 2 of the present invention;

[0021] Figure 3 It is a schematic diagram of the energy level structure of quantum dots in a three-dimensional scene display method based on holographic projection provided in Example 1 of the present invention;

[0022] Figure Notes: E p represents the incident photon energy, E p It represents the energy of emitted photons. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1 and Figure 3 As shown, a three-dimensional scene display method based on holographic projection provided by an embodiment of the present invention specifically includes the following steps:

[0026] Step 1: Prepare quantum dots by chemical solution method or physical vapor deposition method, select quantum dot materials with high luminous efficiency, narrow emission spectrum and good stability, prepare quantum dots with uniform size and luminous wavelength in the visible light range, modify the light propagation model according to the luminous characteristics of quantum dots, calculate the hologram data corresponding to the three-dimensional cube model and project according to the hologram data;

[0027] In some embodiments, a three-dimensional scene model to be displayed is obtained, the model is gridded and converted into a digital model that can be processed by a computer, the luminescence characteristic parameters of quantum dots are obtained, and the hologram is analyzed based on the traditional light model; the fluorescence emission characteristics of quantum dots change the wavelength, intensity and phase distribution of light, and the light propagation model is corrected based on the luminescence characteristics of quantum dots;

[0028] It should be noted that the luminous characteristic parameters include but are not limited to light field intensity, wave number, wavelength, luminous efficiency and phase shift;

[0029] Specifically, the light emitted by quantum dots has a specific wavelength. When calculating light propagation, the light wavelength λ in the traditional model is replaced by the central wavelength λ of the light emitted by the quantum dots. l ;

[0030] Get the original light field intensity I 0 and the luminous efficiency μ of the quantum dots, and the intensity of the light is corrected during the light propagation process;

[0031] Based on the obtained original light field intensity and the luminous efficiency of the quantum dots, the original light field intensity and the luminous efficiency of the quantum dots are multiplied to obtain the quantum dot light intensity μI 0 ;

[0032] Obtain the phase shift caused by the quantum dots The phase term of the light field is corrected and the phase term of the light field is obtained by analysis:

[0033] Based on the obtained luminescence characteristic parameters of quantum dots, the diffraction formula

[0034]

[0035] The light field distribution on the recording plane is calculated, U 0 (ξ,η) is the light field distribution on the object plane, is the wave number, λ l is the wavelength on the light recording plane, z is the distance from the object to the recording plane, i represents the imaginary part of the complex amplitude of the light field, (x, y) represents the coordinates on the recording plane, and (ξ, η) represents the coordinates on the object plane;

[0036] It should be noted that the light field distribution represents the distribution of the intensity, phase, and polarization characteristics of the three-dimensional cube model propagating to the plane where the hologram is located;

[0037] By discretizing the integral region, the light field distribution on the recording plane is calculated using the numerical integration method, and the integral of the function f(x) on the interval [a, b] is calculated using the formula

[0038]

[0039] Obtain an approximate integral value of the light field distribution on the recording plane in the interval [a, b], where n is the number of equally spaced subintervals into which the interval [a, b] is divided, n is an even number, and h is the width of the equally spaced subintervals;

[0040] Integrate the ξ direction and η direction in the diffraction formula to obtain the hologram data corresponding to the three-dimensional cube model;

[0041] Assemble the light source, quantum dot light conversion module, spatial light modulator and projection lens according to the design requirements, turn on the light source, adjust the position and angle of the quantum dot light conversion module so that the light emitted by the light source can fully interact with the quantum dot material to obtain the required light output, load the calculated hologram data onto the spatial light modulator, and adjust the focal length and aperture of the projection lens so that the projected image is clearly focused in the display space;

[0042] The technical solution of the embodiment of the present invention is as follows: by using quantum dot materials, a very narrow emission spectrum can be obtained, which enables the hologram to more accurately reproduce the color and brightness distribution of three-dimensional objects, providing a more realistic and clear three-dimensional visual experience. The selection of quantum dot materials with high luminous efficiency and good stability can ensure that excellent optical performance is maintained under long-term operation, reduce energy loss, and improve the overall efficiency of the system. The light propagation model is adjusted according to the specific luminous characteristics of the quantum dots, including wavelength, intensity and phase distribution, to ensure that the calculated hologram data can truly reflect the actual light field distribution, thereby improving the quality of the holographic image. The discretized integral area and numerical integration method are used to calculate the light field distribution on the recording plane, which ensures the calculation accuracy while greatly shortening the calculation time, which is conducive to real-time or near real-time application scenarios. The design that combines components such as light source, quantum dot light conversion module, spatial light modulator and projection lens allows the system to be finely adjusted to adapt to different application scenarios, and the characteristics of the output light can be adjusted by changing the quantum dot material to achieve diversified display effects.

[0043] Example 2

[0044] like Figure 2 As shown, a three-dimensional scene display method based on holographic projection provided by an embodiment of the present invention specifically includes the following steps:

[0045] Step 2: Based on the projection image generated after the correction of the light propagation model, the quality data of the projection image is collected in real time through the image sensor. The quality data includes but is not limited to the color characteristic value and the clarity characteristic value. The data is analyzed according to the preset algorithm to determine whether the projection system needs to be adjusted and generate different signals;

[0046] In some embodiments, the three-dimensional holographic projection image is evenly divided into pixel blocks of the same size, and the collected holographic projection image is converted from the RGB color space to the CIELAB color space suitable for analyzing color features;

[0047] Get the RGB value of the holographic projection image and normalize it to the range of [0,1], convert the RGB value to the XYZ color space, and use the formula Get XYZ value, where R, G, and B are the values ​​of the red, green, and blue channels in the RGB color space respectively;

[0048] Based on the obtained XYZ value, convert the XYZ value to L in the CIELAB color space * 、a * , b * Value, through the formula

[0049]

[0050]

[0051] Get the L of CIELAB color space * 、a * , b * Value, where L * is the pixel brightness of the three-dimensional image, a * and b * is the chromaticity coordinate, X n , Y n and Z n is the XYZ value of the reference white;

[0052] Based on the CIELAB color space L * 、a * , b * value, calculate L * 、a * , b * The average value and Value, where It represents the average brightness;

[0053] It should be noted that a * and b * The average value and The value determines the color tendency of the image. The larger the positive value, the more reddish the image; The more negative the value, the greener the image. The larger the positive value, the more yellow the image becomes; The more negative the value, the more blue the image will be;

[0054] Based on getting and Value, calculated and The sum of the squares of the values ​​will be and The square root of the sum of the squares of the values ​​is taken to obtain the pixel saturation;

[0055] Based on the obtained pixel saturation, the saturation of all pixel blocks is summed and averaged to obtain the average saturation;

[0056] The obtained average brightness and average saturation are weighted and normalized to obtain a color value;

[0057] The obtained color value is subtracted from the preset color standard value and the absolute value is taken to obtain the color difference value;

[0058] The color characteristic value S is obtained by performing ratio processing based on the obtained color difference and the color standard value. c ;

[0059] It should be noted that the preset color standard values ​​are obtained by the professional and technical personnel of the present invention based on historical experience and industry standards analysis;

[0060] Based on the obtained color feature value S c and the preset color feature threshold S c0 Compare, classify the corresponding projection images and generate different signals;

[0061] Specifically, if the color feature value S c Greater than the preset color feature threshold S c0 , it indicates that the color display effect of the projected image is lower than expected and needs to be adjusted to generate a color optimization signal;

[0062] If the color eigenvalue S c Less than or equal to the preset color feature threshold S c0 , it indicates that the color display effect of the projected image meets the expected effect and generates a normal signal;

[0063] Based on the RGB value of the obtained holographic projection image, the formula G ray =αR+βG+γB to calculate the gray value G of the pixel block ray , where α, β and γ are preset proportional coefficients, the value of α is 0.299, the value of β is 0.587, and the value of γ is 0.114;

[0064] It should be noted that the difference in sensitivity of the human eye to different colors of light determines the values ​​of α, β, and γ. The human eye is most sensitive to green light, so the green weight is the largest. The calculated grayscale reasonably reflects the image brightness and conforms to the human eye's visual perception of grayscale.

[0065] Based on the calculated grayscale value, the maximum grayscale value G in the projected image is obtained. raymax With the minimum gray value G raymin ;

[0066] Perform difference processing on the maximum grayscale value and the minimum grayscale value to obtain the grayscale difference;

[0067] Based on the grayscale difference obtained, the formula Get the contrast C;

[0068] Based on the obtained contrast, the contrast is calculated by difference with the preset standard contrast to obtain the contrast difference:

[0069] The contrast difference is compared with the preset standard contrast to obtain the contrast difference ratio D. b ;

[0070] Based on the obtained grayscale value, the number of occurrences of each grayscale value in the projected image is obtained, and the probability p of each grayscale value occurring is calculated. i , where i represents different grayscale values;

[0071] Based on the probability p of each gray value appearing i , calculated by the information entropy formula

[0072]

[0073] The information entropy H of the projected image is obtained, where L is the total number of gray levels of the projected image;

[0074] Based on the obtained contrast difference ratio D b and information entropy H, the contrast difference D b And the information entropy H is weighted and summed to obtain the clear eigenvalue Q x ;

[0075] Based on the obtained clear eigenvalue Q x With the clear feature threshold Q x0 Compare, classify the corresponding projection images and generate different signals;

[0076] Specifically, if the clear feature value is greater than or equal to the clear feature threshold, it indicates that the clear effect of the projected image meets the expected effect and a normal signal is generated;

[0077] If the clarity feature value is less than the clarity feature threshold, it indicates that the clarity effect of the projected image is lower than the expected effect and needs to be adjusted, thereby generating a clarity optimization signal;

[0078] The technical solution of the embodiment of the present invention is: based on the projection image generated after the correction of the light propagation model, the quality data of the projection image is collected in real time through the image sensor, the quality data includes but is not limited to the color characteristic value and the clarity characteristic value, and the data is analyzed according to the preset algorithm to determine whether the projection system needs to be adjusted; by converting the RGB color space to the CIELAB color space, the CIELAB color space is closer to human visual perception, and the color characteristics are accurately analyzed, which is helpful to detect color deviation and ensure the color accuracy of the projected image; by calculating the average brightness and average saturation, the overall brightness and color intensity of the image are quantified, by calculating the grayscale difference, contrast and its difference ratio, and information entropy, the clarity of the image is effectively evaluated, and by comparing the color characteristic value, the clarity characteristic value and the preset threshold value, it is determined whether the projection system needs to be adjusted.

[0079] Example 3

[0080] like Figure 2 As shown, a three-dimensional scene display method based on holographic projection provided by an embodiment of the present invention specifically includes the following steps:

[0081] Step 3: Based on the color optimization signal and the clarity optimization signal, obtain the characteristic data of the corresponding quantum dots, analyze and adjust the material properties and application methods of the quantum dots;

[0082] In some embodiments, the size of quantum dots is obtained based on the obtained color optimization signal, and quantum dots of different sizes are prepared by precisely controlling the synthesis process of quantum dots. According to the color requirements of the three-dimensional holographic projection image, the quantum dots are adjusted to a suitable size, and the primary colors such as red, green, and blue in the image are optimized to make the color meet the expected effect;

[0083] It should be noted that relatively small-sized quantum dots emit short-wavelength light, such as blue light, while relatively large-sized quantum dots emit long-wavelength light, such as red light;

[0084] Based on the quantum dots adjusted to the appropriate size, the quantum dots are made into a film and placed in the optical path of the projection system. The quantum dot film selectively absorbs and re-emits the incident light. When white light passes through the quantum dot film, the quantum dots convert the light of a specific wavelength into the required color light, improving the color purity and brightness. The thickness of the quantum dot film and the concentration of the quantum dots are adjusted according to the color effect to accurately control the color conversion effect.

[0085] Based on the clear optimization signal obtained, the size distribution of quantum dots is obtained, the synthesis process of quantum dots is strictly controlled, the uniformity of size distribution of quantum dots is improved, and the consistency of optical properties of quantum dots is improved;

[0086] After improving the uniformity of quantum dot size distribution, we select high-quality lenses with high refractive index uniformity, low aberration and chromatic aberration, accurately focus and transmit the light emitted by quantum dots, reduce light scattering and distortion, and use reflectors with high surface flatness and uniform reflectivity, as well as diffraction elements with high diffraction efficiency and high precision to ensure accurate propagation and modulation of light in the projection system;

[0087] The technical solution of the embodiment of the present invention is: to optimize the primary colors such as red, green, and blue by adjusting the size of quantum dots, and to precisely control the wavelength of the emitted light by synthesizing quantum dots of a specific size to ensure the purity and brightness of the color; to adjust the size and concentration of the quantum dots according to the color optimization signal to correct the image color; to improve the clarity of the projected image by improving the uniformity of the size distribution of the quantum dots; to respond and adjust based on the real-time collected quality data and the preset algorithm to enhance the display effect of the projected image.

[0088] Example 4

[0089] The embodiment of the present invention provides a three-dimensional scene display system based on holographic projection, which specifically includes the following modules:

[0090] Projection module: including but not limited to light source, quantum dot light conversion module, spatial light modulator and projection lens, preparing quantum dots by chemical solution method or physical vapor deposition method, selecting quantum dot materials with high luminous efficiency, narrow emission spectrum and good stability, preparing quantum dots with uniform size and luminous wavelength within the visible light range, and projecting according to hologram data;

[0091] Model data analysis module: According to the luminescence characteristics of quantum dots, the light propagation model is modified to calculate the hologram data corresponding to the three-dimensional cube model;

[0092] Projection image data acquisition module: Based on the projection image generated after the correction of the light propagation model, the quality data of the projection image is collected in real time through the image sensor. The quality data includes but is not limited to color feature values ​​and clarity feature values;

[0093] Projection image data analysis module: Analyzes data based on a preset algorithm to determine whether the projection system needs to be adjusted;

[0094] Projection data adjustment module: based on the color optimization signal and the clarity optimization signal, obtain the characteristic data of the corresponding quantum dots, analyze and adjust the material characteristics and application methods of the quantum dots;

[0095] An embodiment of the present invention is described in detail above, but the content described is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention; all equivalent changes and improvements made within the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A three-dimensional scene display method based on holographic projection, characterized in that: The following steps are involved: The quantum dots are prepared by using quantum dot materials with high luminous efficiency, narrow emission spectrum and good stability. According to the luminous characteristics of the quantum dots, the light propagation model is modified, the hologram data corresponding to the three-dimensional cube model is calculated and projected according to the hologram data; Based on the projection image generated after the correction of the light propagation model, the quality data of the projection image is collected in real time through the image sensor. The quality data includes but is not limited to RGB value, XYZ value and average brightness. The color characteristic value and the clarity characteristic value are obtained by analysis. The data is analyzed according to the preset algorithm to determine whether the projection system needs to be adjusted and generate different signals; Based on the different signals obtained, the characteristic data of the corresponding quantum dots are obtained, and the material properties and application methods of the quantum dots are analyzed and adjusted.

2. A three-dimensional scene display method based on holographic projection according to claim 1, characterized in that: The specific correction process of the light propagation model is as follows: Obtain the 3D scene model to be displayed, grid the model, convert it into a digital model that can be processed by the computer, obtain the luminescence characteristic parameters of the quantum dots, and analyze the hologram based on the traditional light model; the fluorescence emission characteristics of the quantum dots change the wavelength, intensity and phase distribution of the light, and the light propagation model is corrected based on the luminescence characteristics of the quantum dots; The light emitted by quantum dots has a specific wavelength. When calculating light propagation, the wavelength λ in the traditional model is replaced by the central wavelength λ of the light emitted by the quantum dots. l ; Obtain the original light field intensity I0 and the luminous efficiency μ of the quantum dots, and correct the light intensity during the light propagation process; Based on the obtained original light field intensity and the luminous efficiency of the quantum dots, the original light field intensity and the luminous efficiency of the quantum dots are multiplied to obtain the quantum dot light intensity μI0; Obtain the phase shift caused by the quantum dots The phase term of the light field is corrected and the phase term of the light field is obtained by analysis: Based on the obtained luminescence characteristic parameters of quantum dots, the diffraction formula The light field distribution on the recording plane is calculated.

3. The three-dimensional scene display method based on holographic projection according to claim 1, characterized in that: The specific process of obtaining the hologram data is as follows: By discretizing the integral region, the light field distribution on the recording plane is calculated using the numerical integration method, and the integral of the function f(x) on the interval [a, b] is calculated using the formula Obtain an approximate integral value of the light field distribution on the recording plane in the interval [a, b], where n is the number of equally spaced subintervals into which the interval [a, b] is divided, n is an even number, and h is the width of the equally spaced subintervals; By integrating the ξ and η directions in the diffraction formula, the hologram data corresponding to the three-dimensional cube model is obtained.

4. The three-dimensional scene display method based on holographic projection according to claim 1, characterized in that: The specific process of obtaining the XYZ value is as follows: The three-dimensional holographic projection image is evenly divided into pixel blocks of the same size, and the collected holographic projection image is converted from the RGB color space to the CIELAB color space suitable for analyzing color features; Get the RGB value of the holographic projection image and normalize it to the range of [0,1], convert the RGB value to the XYZ color space, and use the formula Get XYZ values, where R, G, and B are the values ​​of the red, green, and blue channels in the RGB color space, respectively.

5. The three-dimensional scene display method based on holographic projection according to claim 1, characterized in that: The specific process of obtaining the average brightness is as follows: Based on the obtained XYZ value, convert the XYZ value to L in the CIELAB color space * 、a * and b * Value, where L * is the pixel brightness of the three-dimensional image, a * and b * is the chromaticity coordinate, X n , Y n and Z n is the XYZ value of the reference white; Based on the CIELAB color space L * 、a * and b * value, calculate L * 、a * and b * The average value and Value, where It indicates the average brightness.

6. The three-dimensional scene display method based on holographic projection according to claim 1, characterized in that: The specific process of obtaining the color feature value is as follows: Based on getting and Value, calculated and The sum of the squares of the values ​​will be and The square root of the sum of the squares of the values ​​is taken to obtain the pixel saturation; Based on the obtained pixel saturation, the saturation of all pixel blocks is summed and averaged to obtain the average saturation; The obtained average brightness and average saturation are weighted and normalized to obtain a color value; The obtained color value is subtracted from the preset color standard value and the absolute value is taken to obtain the color difference value; Based on the obtained color difference and the color standard value, the color characteristic value S is obtained. c , analyze and judge to generate normal signal and color optimized signal.

7. The three-dimensional scene display method based on holographic projection according to claim 6, characterized in that: The specific adjustment process based on the color optimization signal is as follows: Based on the obtained color optimization signal, the size of quantum dots is obtained, and quantum dots of different sizes are prepared by precisely controlling the synthesis process of quantum dots. According to the color requirements of the three-dimensional holographic projection image, the quantum dots are adjusted to a suitable size, and the primary colors such as red, green, and blue in the image are optimized to make the color meet the expected effect; Based on the quantum dots adjusted to the appropriate size, the quantum dots are made into a film and placed in the optical path of the projection system. The quantum dot film selectively absorbs and re-emits the incident light. When white light passes through the quantum dot film, the quantum dots convert light of a specific wavelength into light of the desired color, thereby improving the color purity and brightness. The thickness of the quantum dot film and the concentration of the quantum dots are adjusted according to the color effect to precisely control the color conversion effect.

8. The three-dimensional scene display method based on holographic projection according to claim 1, characterized in that: The specific process of obtaining the clear eigenvalue is as follows: Based on the obtained grayscale value, the number of occurrences of each grayscale value in the projected image is obtained, and the probability p of each grayscale value occurring is calculated. i , where i represents different grayscale values; Based on the probability p of each gray value appearing i , calculated by the information entropy formula The information entropy H of the projected image is obtained, where L is the total number of gray levels of the projected image; Based on the obtained contrast difference ratio D b and information entropy H, the contrast difference D b And the information entropy H is weighted and summed to obtain the clear eigenvalue Q x , analyze and judge to generate normal signals and clear optimized signals.

9. The three-dimensional scene display method based on holographic projection according to claim 8, characterized in that: Based on the RGB value of the obtained holographic projection image, the formula G ray =αR+βG+γB to calculate the gray value G of the pixel block ray , where α, β and γ are preset proportional coefficients, the value of α is 0.299, the value of β is 0.587, and the value of γ is 0.114; Based on the calculated grayscale value, the maximum grayscale value G in the projected image is obtained. raymax With the minimum gray value G raymin ; Perform difference processing on the maximum grayscale value and the minimum grayscale value to obtain the grayscale difference; Based on the grayscale difference obtained, the formula Get the contrast C; Based on the obtained contrast, the contrast is calculated to be different from a preset standard contrast to obtain a contrast difference; The contrast difference is compared with the preset standard contrast to obtain the contrast difference ratio D. b .

10. The three-dimensional scene display method based on holographic projection according to claim 8, characterized in that: The specific adjustment process based on the clear optimization signal is as follows: Based on the clear optimization signal obtained, the size distribution of quantum dots is obtained, the synthesis process of quantum dots is strictly controlled, the uniformity of size distribution of quantum dots is improved, and the consistency of optical properties of quantum dots is improved; Based on improving the uniformity of the size distribution of quantum dots, high-quality lenses with high refractive index uniformity, low aberration and chromatic aberration are selected to accurately focus and transmit the light emitted by quantum dots, reduce light scattering and distortion, and use mirrors with high surface flatness and uniform reflectivity, as well as diffraction elements with high diffraction efficiency and high precision.

Images