Method and system for suppressing halo effect of all-in-one machine LED display screen

Abstract

The present invention provides a method and system for suppressing the halo effect of an all-in-one machine LED display, including: S1, identifying whether there is a halo effect in the all-in-one machine LED display. If yes, go to S2; S2, turning on the light-shielding strip arranged around the all-in-one machine LED display, and identifying whether the halo effect is effectively suppressed. If yes, go to S8; S3, turning on the soft light supplementary light strip arranged around the all-in-one machine LED display, and identifying whether the halo effect is effectively suppressed. If not, go to S4; S4, adjusting the brightness of the all-in-one machine LED display, and identifying whether the halo effect is effectively suppressed. If not, go to S5; S5, adjusting the contrast of the all-in-one machine LED display, and identifying whether the halo effect is effectively suppressed. If not, go to S6; S6, adjusting the angle of the all-in-one machine LED display, and identifying whether the halo effect is effectively suppressed. If not, go to S7; S7, updating the brightness of the all-in-one machine LED display and the contrast of the all-in-one machine LED display, and then go to S4; S8, ending the process.

Description

Technical Field

[0001] The present invention belongs to the field of all-in-one LED display devices, and in particular relates to a method and system for suppressing the halo effect of an all-in-one LED display screen. Background Art

[0002] With the advent of all-in-one LED displays, they have been increasingly adopted in key locations such as command center lobbies, control rooms, and conference centers, thanks to their advantages such as truly seamless splicing, high cost-effectiveness, outstanding color reproduction, and near-perfect display quality. The halo effect on all-in-one LED displays is a visual effect that occurs during the display process, also known as "HALO" or "halo." This effect is often seen at night or in low light conditions, where a glowing ring or halo appears around the screen when viewing the content on an all-in-one LED display.

[0003] This effect occurs due to the inherent beam characteristics and optical effects of the all-in-one LED display's light source. The LEDs in an all-in-one LED display are single light sources and cannot guarantee absolutely uniform light distribution. Therefore, at certain viewing angles, light may be scattered by the eye or lens, forming a ring or halo. This effect directly affects visual comfort, especially at night, causing dizziness or discomfort when viewing the all-in-one LED display.

[0004] The severity of the halo effect on all-in-one LED displays depends on multiple factors, including the design, position, and brightness of the display's LED light source, as well as the viewer's perspective and ambient lighting conditions. In actual use, it's not practical to suppress the halo effect by changing the inherent factors of the LED light source, such as the optical lens, reflector, and wavelength. The brightness and contrast of the display's LED light source, the viewer's viewing angle, and changes in ambient light can also suppress the halo effect. The LED halo effect is typically a nonlinear visual phenomenon related to its generation conditions, and simple linear formulas cannot describe these complexities and nonlinearities.

[0005] The causes of the halo effect in an all-in-one LED display are not independent, and there is an interaction relationship between them. Usually, the brightness and contrast of the light source of an all-in-one LED display are very high. At the same time, under low light conditions, the halo effect will occur, and the halo effect will also occur at certain specific viewing angles. When suppressing the halo effect of an all-in-one LED display, it is not necessary to clarify the causes of the halo effect of the all-in-one LED display. It is only necessary to identify whether there is a halo effect, and adjust the brightness, contrast, ambient light, and viewing angle of the LED display light source to achieve the purpose of suppressing the halo effect of the all-in-one LED display and meet the requirements of visual comfort. Summary of the Invention

[0006] To solve the problems raised in the above background technology, the present invention provides a method and system for suppressing the halo effect of an all-in-one LED display, which is used to identify the halo effect of an all-in-one LED display, and adjust the brightness of the light source, ambient light, and viewing angle to adaptively suppress the halo effect of the all-in-one LED display, and can achieve high-quality display effects and meet high-quality visual requirements.

[0007] To achieve the above object, in the first aspect of the present invention, a method for suppressing the halo effect of an all-in-one LED display is provided, including:

[0008] S1, identify whether there is a halo effect in the all-in-one LED display through an optical vision image or a polarized light image. If yes, go to S2; if no, go to S8;

[0009] S2, open the light-shielding strip set around the all-in-one LED display, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S3;

[0010] S3, open the soft light compensation strip set around the all-in-one LED display, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S4;

[0011] S4, adjust the brightness of the all-in-one LED display, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S5;

[0012] S5, adjust the contrast of the all-in-one LED display, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S6;

[0013] S6, adjust the angle of the all-in-one LED display, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S7;

[0014] S7. Update the brightness and contrast of the all-in-one LED display screen, and then go to S4;

[0015] S8. End the process.

[0016] As a further description of the above solution: The step S1 further includes:

[0017] Step S11. Convert the color image displayed on the LED display screen into a grayscale image;

[0018] Step S12. Perform Gaussian filtering on the grayscale image;

[0019] Step S13. Calculate the image gradient of the grayscale image;

[0020] Step S14. Convert the grayscale image into a binary image;

[0021] Step S15. Identify whether there is a halo effect through the binary image.

[0022] As a further description of the above solution: The step S12 further includes:

[0023] Step S121. Take the polarization image of the grayscale image;

[0024] Step S122. Calculate the Stokes parameters;

[0025] Step S123. Analyze the polarization state and identify whether there is a halo effect.

[0026] As a further description of the above solution: The step S13 further includes: Using the Sobel operator to calculate the gradient value and direction of each pixel in the grayscale image.

[0027] As a further description of the above solution: The step S14 further includes: Converting the grayscale image into a binary image by adopting a double-threshold detection method.

[0028] As a further description of the above solution: The step S4 further includes:

[0029] Step S41. Identify whether there is a halo effect through an optical vision image or a polarized light image. If yes, go to step S42; if no, go to step S8;

[0030] Step S42. Judge whether , if yes, go to step S5; if no, go to step S43;

[0031] Step S43. Let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S5; if no, go to step S44;

[0032] Step S44, let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S46; if no, go to step S45;

[0033] Step S45, let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the adjusted brightness of the all-in-one machine LED display; if no, use as the brightness of the adjusted all-in-one machine LED display;

[0034] Step S46, let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the brightness of the adjusted all-in-one machine LED display; if no, use as the brightness of the adjusted all-in-one machine LED display;

[0035] Among them, is the brightness of the all-in-one machine LED display, is the real-time brightness of the all-in-one machine LED display, is the minimum visible brightness of the all-in-one machine LED display.

[0036] As a further description of the above solution: The step S5 further includes:

[0037] Step S51, determine whether there is a halo effect through an optical vision image or a polarized light image. If yes, go to step S52; if no, go to step S8;

[0038] Step S52, judge whether , if yes, go to step S6; if no, go to step S53;

[0039] Step S53, let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S6; if no, go to step S54;

[0040] Step S54, let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S56; if no, go to step S55;

[0041] Step S55, let , determine whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use As the contrast of the all-in-one LED display after adjustment, no, As the contrast of the all-in-one LED display after adjustment;

[0042] Step S56, set , through optical visual images or polarized light images to identify whether there is still a halo effect, yes, with As the contrast of the all-in-one LED display after adjustment, no, As the contrast of the all-in-one LED display after adjustment;

[0043] in, It is the contrast of the all-in-one LED display. It is the real-time contrast of the all-in-one LED display. It is the minimum visual contrast of the all-in-one LED display.

[0044] As a further description of the above solution: Step S6 further includes:

[0045] Step S61, identifying whether a halo effect exists through an optical visual image or a polarized light image, if yes, go to step S62, if no, go to step S8;

[0046] Step S62, determine whether If yes, go to step S7; if no, go to step S63;

[0047] Step S63, set , identify whether the halo effect still exists through the optical visual image or the polarized light image, if yes, go to step S7, if not, go to step S64;

[0048] Step S64, set , identify whether there is still a halo effect through the optical visual image or polarized light image, if yes, go to step S65, if not, As the angle of the all-in-one LED display after adjustment;

[0049] Step S65: , identify whether there is still a halo effect through the optical visual image or polarized light image, if yes, go to step S66, if not, As the angle of the all-in-one LED display after adjustment;

[0050] Step S66, set , through optical visual images or polarized light images to identify whether there is still a halo effect, yes, with As the angle of the all-in-one LED display after adjustment, no, As the angle of the all-in-one LED display after adjustment;

[0051] Among them, is the angle of the all-in-one LED display screen, is the real-time angle of the all-in-one LED display screen, is the maximum adjustable angle of the all-in-one LED display screen.

[0052] As a further description of the above solution: the step S7 includes: making , and then making ; then making , and then making , and then turning to step S4;

[0053] Among them, is the current minimum visible brightness of the all-in-one LED display screen, is the minimum visible brightness of the all-in-one LED display screen, is the visible brightness adjustment parameter, is the current minimum visible contrast of the all-in-one LED display screen, is the minimum visible contrast of the all-in-one LED display screen, is the visible contrast adjustment parameter.

[0054] In the second aspect of the present invention, a system for suppressing the halo effect of an all-in-one LED display screen is provided, which suppresses the halo effect by using the method for suppressing the halo effect as described above.

[0055] The present invention provides a method and a system for suppressing the halo effect of an all-in-one LED display screen, which are used to adaptively identify the halo effect of the all-in-one LED display screen, and adjust the brightness of the light source, the ambient light, and the viewing angle. At the same time, the non-linear and complex contradictory relationship between the display effect, the visual quality, and the suppression of the halo effect is fully considered. It can not only adaptively suppress the halo effect without manual adjustment, but also can keep the original display effect and visual quality as much as possible while suppressing the halo effect of the all-in-one LED display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0057] Figure 1 is a flowchart of a method for suppressing the halo effect of an all-in-one LED display screen proposed by the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0059] Please refer to Figure 1 , in the first aspect of the present invention, a method for suppressing the halo effect of an all-in-one LED display screen is provided, including:

[0060] S1. Identify whether there is a halo effect on the all-in-one LED display screen through an optical vision image or a polarized light image. If yes, go to step S2; if no, go to step S8.

[0061] Optionally, this step further includes:

[0062] Step S11. Grayscale conversion, converting the color image displayed on the LED display screen into a grayscale image.

[0063] Step S12. Gaussian filtering, performing Gaussian filtering on the grayscale image to smooth the image and reduce high-frequency noise in the image.

[0064] Optionally, this step further includes:

[0065] Step S121. Obtain a polarized image from the grayscale image.

[0066] Optionally, in this step, light in different polarization states is captured through a polarization imaging device or a polarization filter.

[0067] Step S122. Stokes parameter calculation.

[0068] Optionally, the Stokes parameters are four parameters used to describe polarized light. For each pixel, the polarization components of light are used to calculate the Stokes parameters.

[0069] Optionally, the Stokes parameters include: four parameters of total intensity, horizontal polarization, vertical polarization, and circular polarization.

[0070] Optionally, the total intensity is calculated according to the following formula: , the horizontal polarization is calculated according to the following formula: , the vertical polarization is calculated according to the following formula: , the circular polarization is calculated according to the following formula: .

[0071] Among them, is the light intensity in the horizontal polarization state, is the light intensity in the vertical polarization state, is the light intensity in the diagonal polarization state, is the light intensity in the anti-diagonal polarization state, is the light intensity in the left-handed polarization state, is the light intensity in the right-handed polarization state. The values of the above light intensities can all be obtained through actual measurement.

[0072] Step S123, analyze the polarization state, and analyze the polarization state of the light source of the all-in-one machine LED display screen by the changes of the horizontal polarization and vertical polarization components to identify whether there is a halo effect.

[0073] Optionally, if the components of the horizontal polarization and the vertical polarization change, it is determined that there is a halo effect.

[0074] Step S13, calculate the image gradient of the grayscale image.

[0075] Optionally, use the Sobel operator to calculate the gradient value and direction of each pixel in the grayscale image. The Sobel operator calculates the gradients in the horizontal (x direction) and vertical (y direction) directions respectively.

[0076] Optionally, the magnitude of the gradient and the gradient direction can be calculated using the following formulas:

[0077] ;

[0078] ,

[0079] Among them, is the convolution kernel in the direction, is the convolution kernel in the direction.

[0080] Step S14, convert the grayscale image into a binary image;

[0081] Optionally, in this step, the double-threshold detection method is adopted. Specifically, double-threshold detection is applied to the grayscale image to divide the pixels into strong edges, weak edges, and non-edge pixels. The strong-edge pixels are determined by the high threshold, the weak-edge pixels are determined by the low threshold, and the non-edge pixels are suppressed to convert the grayscale image into a binary image.

[0082] Step S15, identify whether there is a halo effect through the binary image.

[0083] S2, the controller turns on the light-shielding strip set around the all-in-one machine LED display screen, and identifies whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to step S8; if no, go to step S3;

[0084] S3, the controller turns on the soft light compensation strip set around the all-in-one machine LED display screen, and identifies whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to step S8; if no, go to step S4;

[0085] S4, the controller adjusts the brightness of the all-in-one machine LED display screen, and identifies whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to step S8; if no, go to step S5;

[0086] Optionally, in this step, the brightness of the all-in-one machine LED display screen can be adjusted within the range of the real-time brightness of the all-in-one machine LED display screen and the minimum visible brightness of the all-in-one machine LED display screen range.

[0087] Optionally, this step further includes:

[0088] Step S41, identify whether there is a halo effect through an optical vision image or a polarized light image. If yes, go to step S42; if no, go to step S8;

[0089] Step S42, judge whether , if yes, go to step S5; if no, go to step S43;

[0090] Step S43, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S5; if no, go to step S44;

[0091] Step S44, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S46; if no, go to step S45;

[0092] Step S45, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the brightness of the adjusted all-in-one machine LED display screen; if no, use as the brightness of the adjusted all-in-one machine LED display screen;

[0093] Step S46, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use As the brightness of the integrated machine LED display after adjustment, no, use As the brightness of the integrated machine LED display after adjustment.

[0094] Step S5, the controller adjusts the contrast of the integrated machine LED display, and determines whether the halo effect is effectively suppressed by optical vision image or polarized light image recognition. If yes, go to step S8; if no, go to step S6;

[0095] Optionally, in this step, the contrast of the integrated machine LED display can be adjusted within the real-time contrast of the integrated machine LED display and the minimum visible contrast of the integrated machine LED display range.

[0096] Optionally, this step further includes:

[0097] Step S51, determine whether there is a halo effect by optical vision image or polarized light image recognition. If yes, go to step S52; if no, go to step S8;

[0098] Step S52, judge whether , if yes, go to step S6; if no, go to step S53;

[0099] Step S53, let , and determine whether there is still a halo effect by optical vision image or polarized light image recognition. If yes, go to step S6; if no, go to step S54;

[0100] Step S54, let , and determine whether there is still a halo effect by optical vision image or polarized light image recognition. If yes, go to step S56; if no, go to step S55;

[0101] Step S55, let , and determine whether there is still a halo effect by optical vision image or polarized light image recognition. If yes, use as the contrast of the integrated machine LED display after adjustment; if no, use as the contrast of the integrated machine LED display after adjustment;

[0102] Step S56, let , and determine whether there is still a halo effect by optical vision image or polarized light image recognition. If yes, use as the contrast of the integrated machine LED display after adjustment; if no, use as the contrast of the integrated machine LED display after adjustment.

[0103] Step S6, the controller adjusts the angle of the all-in-one machine's LED display screen, and determines whether the halo effect is eliminated by recognizing the optical vision image or polarized light image. If yes, go to step S8; if no, go to step S7;

[0104] Optionally, the angle of the all-in-one machine's LED display screen can be adjusted within the real-time angle of the all-in-one machine's LED display screen and the maximum adjustable angle of the all-in-one machine's LED display screen range.

[0105] Optionally, this step further includes:

[0106] Step S61, determine whether there is a halo effect by recognizing the optical vision image or polarized light image. If yes, go to step S62; if no, go to step S8;

[0107] Step S62, judge whether , if yes, go to step S7; if no, go to step S63;

[0108] Step S63, let , and determine whether there is still a halo effect by recognizing the optical vision image or polarized light image. If yes, go to step S7; if no, go to step S64;

[0109] Step S64, let , and determine whether there is still a halo effect by recognizing the optical vision image or polarized light image. If yes, go to step S65; if no, use as the adjusted angle of the all-in-one machine's LED display screen;

[0110] Step S65, let , and determine whether there is still a halo effect by recognizing the optical vision image or polarized light image. If yes, go to step S66; if no, use as the adjusted angle of the all-in-one machine's LED display screen;

[0111] Step S66, let , and determine whether there is still a halo effect by recognizing the optical vision image or polarized light image. If yes, use as the adjusted angle of the all-in-one machine's LED display screen; if no, use as the adjusted angle of the all-in-one machine's LED display screen.

[0112] S7, update the brightness and contrast of the all-in-one machine's LED display screen, and then go to step S4.

[0113] Optionally, in this step, let , and then let ; then let , and then let , and then return to step S4.

[0114] Among them, is the current minimum visible brightness of the all-in-one machine LED display screen,

[0115] is the minimum visible brightness of the all-in-one machine LED display screen,

[0116] is the visible brightness adjustment parameter, which can be set according to actual needs. Generally, the value is 5% - 15%. Preferably, the value is 10%;

[0117] is the current minimum visible contrast of the all-in-one machine LED display screen,

[0118] is the minimum visible contrast of the all-in-one machine LED display screen,

[0119] is the visible contrast adjustment parameter, which can be set according to actual needs. Generally, the value is 5% - 15%. Preferably, the value is 10%.

[0120] S8. End the process.

[0121] In the second aspect of the present invention, a system for suppressing the halo effect of an all-in-one machine LED display screen uses the method for suppressing the halo effect of an all-in-one machine LED display screen as described above to suppress the halo effect.

[0122] Optionally, the suppression system further includes: a light-shielding strip, an actuator of the light-shielding strip, a soft light supplementary strip, an angle control actuator, a flipping and fixing mechanism of the all-in-one machine LED display screen, a driving board of the all-in-one machine LED display screen, a programmable logic controller, a communication module, an A / D conversion device, an image acquisition module, and a data processing terminal. Among them: the actuator of the light-shielding strip, the soft light supplementary strip, the angle control actuator, and the driving board of the all-in-one machine LED display screen are connected to the programmable logic controller through the communication module and the A / D conversion device. The programmable logic controller and the image acquisition module are then connected to the data processing terminal through the communication module. The light-shielding strip and the soft light supplementary strip are installed around the all-in-one machine LED display screen. The angle control actuator is connected to the top of the all-in-one machine LED display screen and is connected to the fixed frame of the all-in-one machine LED display screen. The flipping and fixing mechanism of the all-in-one machine LED display screen is connected to the bottom of the all-in-one machine LED display screen and is connected to the fixed frame of the all-in-one machine LED display screen.

[0123] Preferably, the image acquisition module is an industrial optical camera or a polarization imaging device.

[0124] Preferably, the light-shielding strip is a diffuse reflection light-shielding material.

[0125] The present invention provides a method and a system for suppressing the halo effect of an all-in-one machine LED display screen, which are used to adaptively identify the halo effect of the all-in-one machine LED display screen, and adjust the brightness of the light source, ambient light, and viewing angle. At the same time, the complex contradictory relationship between the display effect, visual quality, and halo effect suppression is fully considered. It can not only adaptively suppress the halo effect without manual adjustment, but also maintain the original display effect and visual quality as much as possible while suppressing the halo effect of the all-in-one machine LED display screen.

[0126] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0127] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above-mentioned functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above-mentioned wireless terminal can refer to the corresponding process in the foregoing method embodiment and will not be repeated here.

[0128] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0129] In the embodiments provided by the present invention, it should be understood that the disclosed system / terminal device and method can be implemented in other ways. For example, the system / terminal device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the system or unit can be in electrical, mechanical or other forms.

[0130] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for suppressing the halo effect of an all-in-one machine LED display, characterized in that, Including: S1. Identify whether there is a halo effect on the LED display of the all-in-one machine through an optical vision image or a polarized light image. If yes, go to S2; if no, go to S8. S2. Open the light-shielding strip set around the LED display of the all-in-one machine, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S3. S3. Open the soft light supplementary strip set around the LED display of the all-in-one machine, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S4. S4. Adjust the brightness of the LED display of the all-in-one machine, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S5. This step also includes: Step S41. Identify whether there is a halo effect through an optical vision image or a polarized light image. If yes, go to step S42; if no, go to step S8. Step S42, determine whether , if yes, go to step S5; if no, go to step S43; Step S43, let , identify whether there is still a halo effect through optical vision images or polarized light images. If yes, go to step S5; if no, go to step S44; Step S44, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S46; if no, go to step S45; Step S45, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the brightness of the adjusted all-in-one machine LED display screen. If no, use as the brightness of the adjusted all-in-one machine LED display screen; Step S46, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If so, use as the brightness of the adjusted all-in-one machine LED display screen. If not, use as the brightness of the adjusted all-in-one machine LED display screen; Among them, is the brightness of the all-in-one LED display screen, is the real-time brightness of the all-in-one LED display screen, is the minimum visible brightness of the all-in-one LED display screen; S5. Adjust the contrast of the LED display of the all-in-one machine, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S6. S6. Adjust the angle of the LED display of the all-in-one machine, and identify whether the halo effect is effectively suppressed through an optical vision image or a polarized light image. If yes, go to S8; if no, go to S7. S7. Update the brightness and contrast of the LED display of the all-in-one machine, and then go to S4. S8. End the process.

2. The method for suppressing the halo effect of an all-in-one machine LED display according to claim 1, characterized in that, The step S1 also includes: Step S11. Convert the color image displayed on the LED display into a grayscale image. Step S12. Perform Gaussian filtering on the grayscale image. Step S13. Calculate the image gradient of the grayscale image. Step S14. Convert the grayscale image into a binary image. Step S15. Identify whether there is a halo effect through the binary image.

3. The method for suppressing the halo effect of an all-in-one machine LED display according to claim 2, characterized in that, The step S12 also includes: Step S121. Take the polarized image of the grayscale image. Step S122. Calculate the Stokes parameters. Step S123. Analyze the polarization state and identify whether there is a halo effect.

4. The method for suppressing the halo effect of an all-in-one machine LED display according to claim 2, characterized in that, The step S13 also includes: Use the Sobel operator to calculate the gradient value and direction of each pixel in the grayscale image.

5. The method for suppressing the halo effect of an all-in-one machine LED display according to claim 2, wherein, The step S14 also includes: Convert the grayscale image into a binary image using the double-threshold detection method.

6. The method for suppressing the halo effect of an all-in-one machine LED display according to claim 1, wherein, The step S5 also includes: Step S51. Identify whether there is a halo effect through an optical vision image or a polarized light image. If yes, go to step S52; if no, go to step S8. Step S52, determine whether , if yes, go to step S6; if no, go to step S53; Step S53, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S6; if no, go to step S54; Step S54, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S56; if no, go to step S55; Step S55, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the contrast of the adjusted all-in-one machine LED display screen; if no, use as the contrast of the adjusted all-in-one machine LED display screen; Step S56, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the contrast of the adjusted all-in-one machine LED display screen. If no, use as the contrast of the adjusted all-in-one machine LED display screen; Among them, is the contrast ratio of the all-in-one LED display screen, is the real-time contrast ratio of the all-in-one LED display screen, is the minimum visible contrast ratio of the all-in-one LED display screen.

7. A method for suppressing the halo effect of an all-in-one LED display according to claim 1, characterized in that, The step S6 also includes: Step S61. Identify whether there is a halo effect through an optical vision image or a polarized light image. If yes, go to step S62; if no, go to step S8. Step S62, determine whether ; if yes, go to step S7; if no, go to step S63; Step S63, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S7; if no, go to step S64; Step S64, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S65; if no, use as the angle of the adjusted all-in-one machine LED display screen; Step S65, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, go to step S66; if no, use as the angle of the adjusted all-in-one machine LED display screen; Step S66, let , identify whether there is still a halo effect through an optical vision image or a polarized light image. If yes, use as the angle of the adjusted all-in-one machine LED display screen. If no, use as the angle of the adjusted all-in-one machine LED display screen; Among them, is the angle of the all-in-one LED display screen, is the real-time angle of the all-in-one LED display screen, is the maximum adjustable angle of the all-in-one LED display screen.

8. A method for suppressing the halo effect of an all-in-one machine LED display according to claim 1, characterized in that The step S7 includes: Let , and then let ; then let , and then let , and then go to step S4; Among them, is the current minimum visible brightness of the all-in-one LED display screen, is the visible brightness adjustment parameter, is the current minimum visible contrast ratio of the all-in-one LED display screen, is the minimum visible contrast ratio of the all-in-one LED display screen, is the visible contrast ratio adjustment parameter.

9. A suppression system for the halo effect of an all-in-one machine LED display, characterized in that, Suppress the halo effect by using the method for suppressing the halo effect according to any one of claims 1 to 8.

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