LED display screen intelligent control method and system based on feature information identification

Abstract

The invention discloses an LED display screen intelligent control method and system based on feature information identification, and relates to the technical field of display screen control, and the method comprises the steps: obtaining the structure information of an LED display screen, obtaining the environment light information according to the structure information of a sensor, and obtaining the maximum brightness information and the minimum brightness information of the display screen according to the display structure information. The display screen brightness adjusting efficiency is improved by analyzing the adjustable environment brightness range of the display screen, the display screen brightness adjusting accuracy is improved through the display screen brightness adjusting model, and the situation that when the overall brightness of the display screen is directly adjusted, the display screen brightness adjusting accuracy is improved through the display screen merging area information is avoided. According to the method, the visual effect is reduced due to the fact that the brightness is not matched with the environment brightness, meanwhile, the image display effect difference caused by the display screen area brightness difference is reduced, the display screen refresh rate is analyzed through the pixel moving speed information, the image fluency is improved, and the stability and reliability of the display screen are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen control, and in particular to an intelligent control method and system for an LED display screen based on feature information recognition. Background Art

[0002] LED (Light-Emitting Diode) screens have become the main form of outdoor display, and with the continuous optimization of spacing sizes, their fineness has approached that of traditional display screens such as LCDs. Therefore, they will gradually become the main screen for outdoor display, especially in the fields of advertising, information release and public display. LED displays are widely used due to their high brightness, low power consumption and long life.

[0003] At present, there are still problems in the control of LED display screens, such as the inability to accurately adjust the display screen brightness according to the ambient brightness based on the display screen's own brightness adjustment performance, and the inability to establish a suitable brightness adjustment algorithm. When adjusting through fixed values ​​in conventional means, the display screen brightness cannot be accurately adjusted according to the ambient brightness, which reduces the accuracy of display screen brightness adjustment, and the overall brightness of the display screen is often adjusted directly according to the ambient brightness, which reduces the visual effect of the displayed image. The refresh rate of the display screen cannot be accurately set according to the displayed image content, resulting in image ghosting and reduced image smoothness. Summary of the invention

[0004] In order to solve the above technical problems, a method and system for intelligent control of an LED display screen based on feature information recognition are provided. The technical solution solves the problems raised in the above background technology that the brightness of the display screen cannot be accurately adjusted according to the ambient brightness based on the brightness adjustment performance of the display screen itself, and a suitable brightness adjustment algorithm cannot be established. When adjusting by fixed values ​​in conventional means, the brightness of the display screen cannot be accurately adjusted according to the ambient brightness, which reduces the accuracy of the brightness adjustment of the display screen, and the overall brightness of the display screen is often adjusted directly according to the ambient brightness, which reduces the visual effect of the displayed image, and the refresh rate of the display screen cannot be accurately set according to the displayed image content, resulting in image ghosting and reduced image smoothness.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: An intelligent control method for an LED display screen based on feature information recognition, comprising: Acquire LED display screen structure information, wherein the LED display screen structure information includes sensor structure information and display structure information; Acquire ambient light information according to the sensor structure information, wherein the ambient light information indicates the ambient light condition corresponding to the LED display screen area; According to the display structure information, the maximum brightness information and the minimum brightness information of the display screen are obtained; Obtaining the ambient brightness adjustment range information based on the maximum brightness information and the minimum brightness information of the display screen; According to the ambient brightness adjustment range information, an ambient brightness test set is obtained; According to the environmental brightness test set, a display brightness adjustment model is obtained; Obtaining display screen brightness adjustment information according to the display screen brightness adjustment model and ambient light information; Acquire information about content to be displayed, wherein the information about content to be displayed includes image information and video data to be displayed on the LED display screen; According to the content information to be displayed, based on the optical flow method, pixel movement speed information is obtained, where the pixel movement speed information represents the movement speed of the same pixel point in the image; According to the pixel movement speed information, the display refresh rate setting information is obtained; The display screen is adjusted according to the display screen refresh rate setting information and the display screen brightness adjustment information.

[0006] Preferably, the step of obtaining the ambient brightness adjustment range information according to the maximum brightness information and the minimum brightness information of the display screen specifically includes: According to the structure information of the LED display screen, obtain the standard color gamut information of the display screen; According to the standard color gamut information of the display screen, standard color gamut reference coordinate information is obtained, wherein the standard color gamut reference coordinate information represents the coordinates of the standard color gamut reference color of the display screen in the color space coordinate system; Acquire color test image information, where the color test image is a display screen test image of three reference colors: red, green, and blue; According to the color test image information, the image is displayed based on the LED display screen; Based on the maximum brightness information and the minimum brightness information of the display screen, the external light source is used as the ambient brightness source to adjust the ambient brightness and obtain the image color display data; Based on the color space coordinate system, according to the image color display data, the color display coordinate information is obtained; Obtaining color coordinate distance information according to the color display coordinate information and the standard color gamut reference coordinate information; Based on the color difference recognition analysis of human eyes, the color coordinate distance threshold is obtained; According to the color coordinate distance information and the color coordinate distance threshold, the ambient brightness adjustment range information is obtained.

[0007] Preferably, the step of obtaining the ambient brightness adjustment range information according to the color coordinate distance information and the color coordinate distance threshold specifically includes: According to the maximum brightness information of the display screen, set the LED display screen to the maximum brightness; The ambient brightness is increased based on the external light source until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the maximum adjusted ambient brightness; According to the minimum brightness information of the display screen, set the LED display screen to the minimum brightness; Based on the external light source, the ambient brightness is reduced until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the minimum adjusted ambient brightness; According to the maximum adjustable ambient brightness and the minimum adjustable ambient brightness, obtain ambient brightness adjustment range information; Wherein, the color coordinate distance is: Where E is the color coordinate distance, represents the color display coordinates of the i-th base color, Represents the standard color gamut reference coordinates of the i-th reference color.

[0008] Preferably, obtaining a display screen brightness adjustment model according to an environmental brightness test set specifically includes: According to the LED display screen structure information, conventional environment brightness information is obtained, where the conventional environment brightness information represents the average value of the environment brightness in the conventional application environment of the LED display screen; Obtaining an ambient brightness difference coefficient according to the ambient brightness adjustment range information and the conventional ambient brightness information; According to the ambient brightness difference coefficient, obtain the ambient brightness reference value; The ambient brightness reference is used as the ambient brightness difference value to divide the ambient brightness adjustment range, and an ambient brightness test set is obtained, wherein the ambient brightness test set includes a plurality of ambient brightness data, and the difference between adjacent ambient brightnesses is the ambient brightness reference; Among them, if the ambient brightness difference coefficient , then the ambient brightness reference is ,like or , then the ambient brightness reference is ; Obtaining color test image information and standard color gamut reference coordinate information; According to the environmental brightness test set, the color test image is displayed based on the LED display screen to obtain the color display test data under different environmental brightness; Based on the color space coordinate system and according to the color display test data, color display test coordinate information is obtained; Obtaining color test coordinate distance information according to color display test coordinate information and standard color gamut reference coordinate information; Adjust the brightness of the display screen until the color test coordinate distance reaches the minimum, and obtain the optimal brightness information of the display screen corresponding to the ambient brightness; Match the ambient brightness test set with the corresponding display screen optimal brightness information to obtain a display screen brightness adjustment data set; According to the display brightness adjustment data set, the existing brightness adjustment model is trained to obtain the display brightness adjustment model; The calculation formula of the ambient brightness difference coefficient is: In the formula, is the ambient brightness difference coefficient, For normal ambient brightness, is the maximum adjusted ambient brightness in the ambient brightness adjustment range, The minimum adjusted ambient brightness in the ambient brightness adjustment range; The display screen brightness adjustment model is specifically as follows: Where L is the brightness of the display, Indicates the ambient brightness The display screen has the best brightness. is the ambient brightness, represents the brightness variation coefficient, where ,but ,like ,but , is the model characteristic coefficient, For correction items.

[0009] Preferably, acquiring display screen brightness adjustment information according to the display screen brightness adjustment model and the ambient light information specifically includes: According to the ambient light information, obtain the ambient brightness information; Divide the display screen into regions, divide the display screen regions with the same ambient brightness into the same region, and obtain the ambient brightness information of the display screen regions; According to the display area ambient brightness information, based on the display brightness adjustment model, the display brightness information corresponding to the ambient brightness of each area is obtained; According to the ambient brightness information, the brightness deviation coefficient is obtained; Obtaining a brightness recognition feature value according to the brightness deviation coefficient and the display brightness information; According to the display brightness information, the areas where the display brightness difference is less than the brightness identification feature value are merged to obtain the display merge area information, and the average display brightness in each display merge area is used as the display brightness of the display merge area; According to the display screen merge area information, obtain the display screen brightness information of the merged area; Acquire display screen brightness adjustment information according to the display screen brightness information of the merged area, wherein the display screen brightness adjustment information is used to adjust the display screen brightness; The calculation formula of the brightness deviation coefficient is:

[0010] Where k is the brightness deviation coefficient, is the maximum ambient brightness of the display area, is the minimum ambient brightness of the display area, is the maximum adjusted ambient brightness in the ambient brightness adjustment range, The minimum adjusted ambient brightness in the ambient brightness adjustment range; The brightness identification characteristic value is specifically: In the formula, Identify eigenvalues ​​for brightness, It is the maximum brightness of the display screen corresponding to the ambient brightness of the display screen area.

[0011] Preferably, obtaining display screen refresh rate setting information according to pixel movement speed information specifically includes: According to the LED display screen structure information, obtain the basic refresh rate information of the display screen; Based on the analysis of the application scenario of the LED display screen, the visual angle information and the observation distance information are obtained, wherein the visual angle information indicates the minimum resolvable angle of the LED display screen, and the observation distance information indicates the viewing distance when the LED display screen is used; Obtaining the visual resolution limit value according to the visual angle information and the observation distance information; Obtain the pixel movement speed threshold according to the visual resolution limit value and the basic refresh rate information of the display screen; According to the pixel movement speed information and the pixel movement speed threshold, determine whether to adjust the refresh rate of the display screen; if not, keep the basic refresh rate of the display screen unchanged; if yes, obtain the target refresh rate information of the display screen according to the pixel movement speed information and the visual resolution limit value; According to the display screen target refresh rate information, obtain the display screen refresh rate setting information; The visual resolution limit value is specifically: In the formula, is the visual resolution limit, is the observation distance, For visual perspective; The pixel movement speed threshold is specifically:

[0012] In the formula, is the pixel moving speed threshold, Is the basic refresh rate of the display; The target refresh rate of the display screen is specifically: In the formula, is the target refresh rate of the display, is the pixel moving speed, Indicates the maximum refresh rate of the display.

[0013] Furthermore, an intelligent control system for an LED display screen based on feature information recognition is proposed, which is used to implement the control method as described above, including: A main control module, the main control module is used to obtain environmental brightness adjustment range information according to color coordinate distance information and color coordinate distance threshold, match the environmental brightness test set with the corresponding display screen optimal brightness information, obtain a display screen brightness adjustment data set, train an existing brightness adjustment model according to the display screen brightness adjustment data set, obtain a display screen brightness adjustment model, divide the display screen into regions, obtain display screen region environmental brightness information, obtain display screen brightness adjustment information according to the merged region display screen brightness information, determine whether to adjust the display screen refresh rate according to the pixel movement speed information and the pixel movement speed threshold, obtain the display screen target refresh rate information according to the pixel movement speed information and the visual resolution limit value, and obtain the display screen refresh rate setting information according to the display screen target refresh rate information; An information acquisition module, the information acquisition module is used to acquire the LED display screen structure information, sensor structure information and display structure information, acquire the ambient light information according to the sensor structure information, acquire the display screen maximum brightness information and the display screen minimum brightness information according to the display structure information, acquire the content information to be displayed, and acquire the pixel movement speed information according to the content information to be displayed based on the optical flow method; A display screen test module, wherein the display screen test module is used to display an image based on an LED display screen according to color test image information, take the maximum brightness information of the display screen and the minimum brightness information of the display screen as a reference, take an external light source as an ambient brightness source, adjust the ambient brightness, obtain image color display data, obtain color display coordinate information based on a color space coordinate system and the image color display data, obtain color coordinate distance information based on the color display coordinate information and the standard color gamut reference coordinate information, display the color test image based on an LED display screen according to an ambient brightness test set, obtain color display test data under different ambient brightnesses, obtain color display test coordinate information based on a color space coordinate system and the color display test data, and obtain color test coordinate distance information based on the color display test coordinate information and the standard color gamut reference coordinate information; An evaluation module, the evaluation module is used to obtain conventional ambient brightness information according to the LED display screen structure information, obtain the ambient brightness difference coefficient according to the ambient brightness adjustment range information and the conventional ambient brightness information, obtain the ambient brightness reference according to the ambient brightness difference coefficient, obtain the brightness deviation coefficient according to the ambient brightness information, and obtain the brightness recognition feature value according to the brightness deviation coefficient and the display screen brightness information; Optionally, the main control module specifically includes: A control unit, the control unit is used to divide the display screen into regions, obtain the display screen area environment brightness information, obtain the display screen brightness adjustment information according to the merged area display screen brightness information, determine whether to adjust the display screen refresh rate according to the pixel movement speed information and the pixel movement speed threshold, obtain the display screen target refresh rate information according to the pixel movement speed information and the visual resolution limit value, and obtain the display screen refresh rate setting information according to the display screen target refresh rate information; An information receiving unit, which interacts with the information acquisition module and the display screen testing module to receive data and transmit it to the model training unit; The model training unit is used to obtain the ambient brightness adjustment range information according to the color coordinate distance information and the color coordinate distance threshold, match the ambient brightness test set with the corresponding display screen optimal brightness information, obtain the display screen brightness adjustment data set, and train the existing brightness adjustment model according to the display screen brightness adjustment data set to obtain the display screen brightness adjustment model.

[0014] Optionally, the information acquisition module specifically includes: A first acquisition unit, the first acquisition unit is used to acquire LED display screen structure information, sensor structure information and display structure information, and acquire ambient light information according to the sensor structure information; The second acquisition unit is used to acquire the maximum brightness information and the minimum brightness information of the display screen according to the display structure information, acquire the content information to be displayed, and acquire the pixel movement speed information based on the optical flow method according to the content information to be displayed.

[0015] Optionally, the display screen testing module specifically includes: A first testing unit, the first testing unit is used to display an image based on an LED display screen according to color test image information, take the maximum brightness information and the minimum brightness information of the display screen as a reference, take an external light source as an ambient brightness source, adjust the ambient brightness, obtain image color display data, obtain color display coordinate information based on the color space coordinate system and the image color display data, and obtain color coordinate distance information based on the color display coordinate information and the standard color gamut reference coordinate information; The second test unit is used to display the color test image based on the LED display screen according to the ambient brightness test set, obtain color display test data under different ambient brightness, obtain color display test coordinate information based on the color display test data based on the color space coordinate system, and obtain color test coordinate distance information based on the color display test coordinate information and the standard color gamut reference coordinate information.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention proposes an intelligent control method and system for an LED display screen based on feature information recognition. The efficiency of display screen brightness adjustment is improved by analyzing the adjustable ambient brightness range of the display screen. The accuracy of display screen brightness adjustment is improved by using a display screen brightness adjustment model. The display screen merges regional information to avoid a reduction in visual effect caused by incompatibility with ambient brightness when the overall brightness of the display screen is directly adjusted. At the same time, the difference in image display effect caused by regional brightness differences of the display screen is reduced. The refresh rate of the display screen is analyzed by using pixel movement speed information, thereby improving image fluency and ensuring the stability and reliability of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a flow chart of an LED display screen intelligent control method based on feature information recognition proposed by the present invention; Figure 2 This is a flow chart for obtaining the ambient brightness adjustment range information in the present invention; Figure 3 Obtain a flow chart for the display screen brightness adjustment model in the present invention; Figure 4 This is a flow chart for obtaining display screen brightness adjustment information in the present invention; Figure 5A flowchart for obtaining display screen refresh rate setting information in the present invention; Figure 6 This is a structural block diagram of an LED display screen intelligent control system based on feature information recognition proposed by the present invention. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0019] Reference Figure 1 - Figure 5 As shown, an intelligent control method of an LED display screen based on feature information recognition in an embodiment of the present invention includes: Acquire LED display screen structure information, wherein the LED display screen structure information includes sensor structure information and display structure information; Acquire ambient light information according to the sensor structure information, wherein the ambient light information indicates the ambient light condition corresponding to the LED display screen area; According to the display structure information, the maximum brightness information and the minimum brightness information of the display screen are obtained; Obtaining the ambient brightness adjustment range information based on the maximum brightness information and the minimum brightness information of the display screen; Specifically, according to the maximum brightness information and the minimum brightness information of the display screen, the ambient brightness adjustment range information is obtained, including: According to the structure information of the LED display screen, obtain the standard color gamut information of the display screen; According to the standard color gamut information of the display screen, standard color gamut reference coordinate information is obtained, wherein the standard color gamut reference coordinate information represents the coordinates of the standard color gamut reference color of the display screen in the color space coordinate system; Acquire color test image information, where the color test image is a display screen test image of three reference colors: red, green, and blue; According to the color test image information, the image is displayed based on the LED display screen; Based on the maximum brightness information and the minimum brightness information of the display screen, the external light source is used as the ambient brightness source to adjust the ambient brightness and obtain the image color display data; Based on the color space coordinate system, according to the image color display data, the color display coordinate information is obtained; Obtaining color coordinate distance information according to the color display coordinate information and the standard color gamut reference coordinate information; Based on the color difference recognition analysis of human eyes, the color coordinate distance threshold is obtained; According to the color coordinate distance information and the color coordinate distance threshold, the ambient brightness adjustment range information is obtained.

[0020] Specifically, according to the color coordinate distance information and the color coordinate distance threshold, the ambient brightness adjustment range information is obtained, which specifically includes: According to the maximum brightness information of the display screen, set the LED display screen to the maximum brightness; The ambient brightness is increased based on the external light source until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the maximum adjusted ambient brightness; According to the minimum brightness information of the display screen, set the LED display screen to the minimum brightness; Based on the external light source, the ambient brightness is reduced until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the minimum adjusted ambient brightness; According to the maximum adjustable ambient brightness and the minimum adjustable ambient brightness, information about the ambient brightness adjustment range is obtained; Wherein, the color coordinate distance is: Where E is the color coordinate distance, represents the color display coordinates of the i-th base color, Represents the standard color gamut reference coordinates of the i-th reference color.

[0021] In this scheme, through color test image information, image display is performed based on the LED display screen, and the maximum brightness information and the minimum brightness information of the display screen are used as references, and the external light source is used as the source of ambient brightness to adjust the ambient brightness and obtain image color display data. In this embodiment, the image color display data is the image data displayed on the display screen acquired by the image sensor, which is used to represent the image display status observed by the human eye. Based on the color space coordinate system, the color display coordinate information is obtained according to the image color display data, and the color coordinate distance is obtained according to the color display coordinate information and the standard color gamut reference coordinate information. The LED display screen is set to the maximum brightness, and the ambient brightness is increased until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the maximum adjusted ambient brightness, and the LED display screen is set to the minimum brightness, and the ambient brightness is reduced until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the minimum adjusted ambient brightness; It is understandable that the ambient brightness changes over time, and the display adjusts its own brightness according to the ambient brightness to ensure the restoration and accuracy of the displayed image color and the visual effect of the image. However, there are certain limitations on the ambient brightness that the display can adjust. If the ambient brightness is too high, the display will not be able to adjust to the optimal brightness due to its limited maximum brightness. Therefore, the color coordinate distance is used to analyze the adjustable ambient brightness of the display.

[0022] In this embodiment, the color space coordinate system is the CIE XYZ color space coordinate system, the standard color gamut of the display screen is Adobe RGB, the reference color coordinates are (0.950456, 0.743125, 0.066924) (red), (0.323793, 1.0, 0.0) (green) (0.159057, 0.072096, 0.918256) (blue), and the color coordinate distance threshold is 3. In general visual application scenarios, when the color coordinate distance is less than or equal to 3, most people find it difficult to perceive obvious differences between colors, and believe that the color deviation is within an acceptable range and the visual effect is good. When the color coordinate distance exceeds 3, the color difference will be more obvious, which may affect the visual effect.

[0023] According to the ambient brightness adjustment range information, an ambient brightness test set is obtained; According to the environmental brightness test set, obtain the display brightness adjustment model; Specifically, according to the ambient brightness test set, a display brightness adjustment model is obtained, which includes: According to the LED display screen structure information, conventional environment brightness information is obtained, where the conventional environment brightness information represents the average value of the environment brightness in the conventional application environment of the LED display screen; Obtaining an ambient brightness difference coefficient according to the ambient brightness adjustment range information and the conventional ambient brightness information; According to the ambient brightness difference coefficient, obtain the ambient brightness reference value; The ambient brightness reference is used as the ambient brightness difference value to divide the ambient brightness adjustment range, and an ambient brightness test set is obtained, wherein the ambient brightness test set includes a plurality of ambient brightness data, and the difference between adjacent ambient brightnesses is the ambient brightness reference; Among them, if the ambient brightness difference coefficient , then the ambient brightness reference is ,like or , then the ambient brightness reference is ; Obtaining color test image information and standard color gamut reference coordinate information; According to the environmental brightness test set, the color test image is displayed based on the LED display screen to obtain the color display test data under different environmental brightness; Based on the color space coordinate system and according to the color display test data, color display test coordinate information is obtained; Obtaining color test coordinate distance information according to color display test coordinate information and standard color gamut reference coordinate information; Adjust the brightness of the display screen until the color test coordinate distance reaches the minimum, and obtain the optimal brightness information of the display screen corresponding to the ambient brightness; Match the ambient brightness test set with the corresponding display screen optimal brightness information to obtain a display screen brightness adjustment data set; According to the display brightness adjustment data set, the existing brightness adjustment model is trained to obtain the display brightness adjustment model; The calculation formula of the ambient brightness difference coefficient is: In the formula, is the ambient brightness difference coefficient, For normal ambient brightness, is the maximum adjusted ambient brightness in the ambient brightness adjustment range, The minimum adjusted ambient brightness in the ambient brightness adjustment range; The display screen brightness adjustment model is specifically as follows: Where L is the brightness of the display, Indicates the ambient brightness The display screen has the best brightness. is the ambient brightness, represents the brightness variation coefficient, where ,but ,like ,but , is the model characteristic coefficient, For correction items.

[0024] In this scheme, the ambient brightness difference coefficient is obtained through the ambient brightness adjustment range information and the conventional ambient brightness information, and the ambient brightness reference quantity is obtained according to the ambient brightness difference coefficient. The ambient brightness adjustment range is divided by using the ambient brightness reference quantity as the ambient brightness difference value, and an ambient brightness test set is obtained. According to the ambient brightness test set, the color test image is displayed based on the LED display screen to obtain color display test data under different ambient brightnesses, and the color display test coordinate information is obtained. According to the color display test coordinate information and the standard color gamut reference coordinate information, the color test coordinate distance information is obtained, and the display screen brightness is adjusted until the color test coordinate distance reaches the minimum, and the display screen optimal brightness information corresponding to the ambient brightness is obtained. The ambient brightness test set is matched with the corresponding display screen optimal brightness information, and a display screen brightness adjustment data set is obtained. According to the display screen brightness adjustment data set, an existing brightness adjustment model is trained to obtain a display screen brightness adjustment model; It can be understood that by comparing the adjustable ambient brightness range of the display with the normal ambient brightness, analyzing the differences, and ensuring the ambient brightness baseline through the analysis results, the adjustable ambient brightness range of the display is divided into equal parts according to the ambient brightness baseline, thereby avoiding the increase in data volume caused by too small a difference when analyzing the display brightness by changing the ambient brightness, thereby reducing the analysis efficiency, and reducing the accuracy of the analysis results caused by too large a difference, and adjusting the display brightness according to the ambient brightness until the displayed image color reaches the maximum degree of restoration, thereby obtaining the optimal display brightness corresponding to each ambient brightness, thereby improving the accuracy of subsequent display brightness adjustment.

[0025] In this embodiment, by The change in display brightness under different ambient brightness is used to distinguish the display brightness under different ambient brightness, and the ambient brightness lower than the normal ambient brightness is regarded as a dark light environment. At this time, as the ambient brightness increases, the adjustment speed of the display brightness should be slowed down to avoid light stimulation to the eyes caused by excessive changes in the display brightness. However, in a high-brightness environment, the adjustment speed of the display brightness should gradually become faster to quickly match the ambient brightness and ensure the image display effect.

[0026] Obtaining display screen brightness adjustment information according to the display screen brightness adjustment model and ambient light information; Specifically, according to the display brightness adjustment model and the ambient light information, the display brightness adjustment information is obtained, which specifically includes: According to the ambient light information, obtain the ambient brightness information; Divide the display screen into regions, divide the display screen regions with the same ambient brightness into the same region, and obtain the ambient brightness information of the display screen regions; According to the display area ambient brightness information, based on the display brightness adjustment model, the display brightness information corresponding to the ambient brightness of each area is obtained; According to the ambient brightness information, the brightness deviation coefficient is obtained; Obtaining a brightness recognition feature value according to the brightness deviation coefficient and the display brightness information; According to the display brightness information, the areas where the display brightness difference is less than the brightness identification feature value are merged to obtain the display merge area information, and the average display brightness in each display merge area is used as the display brightness of the display merge area; According to the display screen merge area information, obtain the display screen brightness information of the merged area; Acquire display screen brightness adjustment information according to the display screen brightness information of the merged area, wherein the display screen brightness adjustment information is used to adjust the display screen brightness; The calculation formula of the brightness deviation coefficient is: Where k is the brightness deviation coefficient, is the maximum ambient brightness of the display area, is the minimum ambient brightness of the display area, is the maximum adjusted ambient brightness in the ambient brightness adjustment range, The minimum adjusted ambient brightness in the ambient brightness adjustment range; The brightness identification characteristic value is specifically: In the formula, Identify eigenvalues ​​for brightness, It is the maximum brightness of the display screen corresponding to the ambient brightness of the display screen area.

[0027] In this solution, by dividing the display screen into regions, the display screen areas with the same ambient brightness are divided into the same area. According to the ambient brightness information of the display screen area and based on the display screen brightness adjustment model, the display screen brightness information corresponding to the ambient brightness of each area is obtained. According to the display screen brightness information, the areas where the display screen brightness difference is smaller than the brightness recognition feature value are merged to obtain the display screen merged area information. According to the merged area display screen brightness information, the display screen brightness adjustment information is obtained.

[0028] This solution can more accurately control the brightness of each area through zoning adjustment, avoid unnecessary energy consumption, and thus achieve energy-saving effects, so that the display screen can maintain a clear and comfortable display effect in each area, ensure that the display screen brightness in each area matches the ambient brightness, reduce the impact of ambient brightness on image display, and improve the overall visual experience. However, it will also cause the regional brightness of the display screen to be inconsistent. In order to ensure that the brightness of the display screens in different areas is different, the display screen performance occupancy ratio will also increase. Therefore, in this solution, the areas are merged to reduce the brightness differences of the display screen areas while reducing the performance occupied by the display screen brightness adjustment. It is understandable that in a bright environment, the pupil of the human eye will shrink, the light entering the eye will decrease, and the visual system will be relatively more sensitive to brightness changes. At this time, the brightness difference in different areas of the display screen is easier to detect. In a dark environment, the pupil of the human eye will expand to receive more light, and the sensitivity to brightness differences will decrease, making it more difficult to detect subtle brightness changes in different areas of the display screen. Therefore, the brightness deviation coefficient is used to analyze the human eye's recognition of display screen brightness differences under different ambient brightness to ensure different regional merging strategies, ensure the accuracy of regional merging, and avoid excessive degradation of image display effects caused by regional merging.

[0029] Acquire information about content to be displayed, wherein the information about content to be displayed includes image information and video data to be displayed on the LED display screen; According to the content information to be displayed, based on the optical flow method, pixel movement speed information is obtained, where the pixel movement speed information represents the movement speed of the same pixel point in the image; According to the pixel movement speed information, the display refresh rate setting information is obtained; Specifically, according to the pixel movement speed information, the display refresh rate setting information is obtained, including: According to the LED display screen structure information, obtain the basic refresh rate information of the display screen; Based on the analysis of the application scenario of the LED display screen, the visual angle information and the observation distance information are obtained, wherein the visual angle information indicates the minimum resolvable angle of the LED display screen, and the observation distance information indicates the viewing distance when the LED display screen is used; Obtaining the visual resolution limit value according to the visual angle information and the observation distance information; Obtain the pixel movement speed threshold according to the visual resolution limit value and the basic refresh rate information of the display screen; According to the pixel movement speed information and the pixel movement speed threshold, determine whether to adjust the refresh rate of the display screen; if not, keep the basic refresh rate of the display screen unchanged; if yes, obtain the target refresh rate information of the display screen according to the pixel movement speed information and the visual resolution limit value; According to the display screen target refresh rate information, obtain the display screen refresh rate setting information; The visual resolution limit value is specifically: In the formula, is the visual resolution limit, is the observation distance, For visual perspective; The pixel movement speed threshold is specifically: In the formula, is the pixel moving speed threshold, Is the basic refresh rate of the display; The target refresh rate of the display screen is specifically: In the formula, is the target refresh rate of the display, is the pixel moving speed, Indicates the maximum refresh rate of the display.

[0030] In this solution, by analyzing the application scenario of the LED display screen, the visual angle information and the observation distance information are obtained, and the visual resolution limit value is obtained based on the visual angle information and the observation distance information. The pixel movement speed threshold value is obtained based on the visual resolution limit value and the basic refresh rate information of the display screen. According to the pixel movement speed information and the pixel movement speed threshold value, it is determined whether to adjust the refresh rate of the display screen, thereby improving the image smoothness and ensuring the stability and reliability of the display screen. For fast-moving images, the refresh rate is increased to reduce the ghosting phenomenon and ensure the smoothness of the image. For static images, the refresh rate is appropriately reduced to save energy.

[0031] In this embodiment, the visual angle refers to the minimum discernible angle when the human eye views the LED display screen, and the observation distance refers to the distance between the user and the LED display screen in a conventional application environment of the LED display screen.

[0032] The display screen is adjusted according to the display screen refresh rate setting information and the display screen brightness adjustment information.

[0033] Reference Figure 6 As shown, further, in combination with the above-mentioned LED display screen intelligent control method based on feature information recognition, an LED display screen intelligent control system based on feature information recognition is proposed, including: A main control module, the main control module is used to obtain environmental brightness adjustment range information according to color coordinate distance information and color coordinate distance threshold, match the environmental brightness test set with the corresponding display screen optimal brightness information, obtain a display screen brightness adjustment data set, train an existing brightness adjustment model according to the display screen brightness adjustment data set, obtain a display screen brightness adjustment model, divide the display screen into regions, obtain display screen region environmental brightness information, obtain display screen brightness adjustment information according to the merged region display screen brightness information, determine whether to adjust the display screen refresh rate according to the pixel movement speed information and the pixel movement speed threshold, obtain the display screen target refresh rate information according to the pixel movement speed information and the visual resolution limit value, and obtain the display screen refresh rate setting information according to the display screen target refresh rate information; An information acquisition module, the information acquisition module is used to acquire the LED display screen structure information, sensor structure information and display structure information, acquire the ambient light information according to the sensor structure information, acquire the display screen maximum brightness information and the display screen minimum brightness information according to the display structure information, acquire the content information to be displayed, and acquire the pixel movement speed information according to the content information to be displayed based on the optical flow method; A display screen test module, wherein the display screen test module is used to display an image based on an LED display screen according to color test image information, take the maximum brightness information of the display screen and the minimum brightness information of the display screen as a reference, take an external light source as an ambient brightness source, adjust the ambient brightness, obtain image color display data, obtain color display coordinate information based on a color space coordinate system and the image color display data, obtain color coordinate distance information based on the color display coordinate information and the standard color gamut reference coordinate information, display the color test image based on an LED display screen according to an ambient brightness test set, obtain color display test data under different ambient brightnesses, obtain color display test coordinate information based on a color space coordinate system and the color display test data, and obtain color test coordinate distance information based on the color display test coordinate information and the standard color gamut reference coordinate information; An evaluation module is used to obtain conventional ambient brightness information based on LED display screen structure information, obtain ambient brightness difference coefficient based on ambient brightness adjustment range information and conventional ambient brightness information, obtain ambient brightness reference value based on ambient brightness difference coefficient, obtain brightness deviation coefficient based on ambient brightness information, and obtain brightness recognition feature value based on brightness deviation coefficient and display screen brightness information.

[0034] Main control module, including: A control unit, the control unit is used to divide the display screen into regions, obtain the display screen area environment brightness information, obtain the display screen brightness adjustment information according to the merged area display screen brightness information, determine whether to adjust the display screen refresh rate according to the pixel movement speed information and the pixel movement speed threshold, obtain the display screen target refresh rate information according to the pixel movement speed information and the visual resolution limit value, and obtain the display screen refresh rate setting information according to the display screen target refresh rate information; An information receiving unit, which interacts with the information acquisition module and the display screen testing module to receive data and transmit it to the model training unit; The model training unit is used to obtain the ambient brightness adjustment range information according to the color coordinate distance information and the color coordinate distance threshold, match the ambient brightness test set with the corresponding display screen optimal brightness information, obtain the display screen brightness adjustment data set, and train the existing brightness adjustment model according to the display screen brightness adjustment data set to obtain the display screen brightness adjustment model.

[0035] Information acquisition module, specifically including: A first acquisition unit, the first acquisition unit is used to acquire LED display screen structure information, sensor structure information and display structure information, and acquire ambient light information according to the sensor structure information; The second acquisition unit is used to acquire the maximum brightness information and the minimum brightness information of the display screen according to the display structure information, acquire the content information to be displayed, and acquire the pixel movement speed information based on the optical flow method according to the content information to be displayed.

[0036] Display screen test module, including: A first testing unit, the first testing unit is used to display an image based on an LED display screen according to color test image information, take the maximum brightness information and the minimum brightness information of the display screen as a reference, take an external light source as an ambient brightness source, adjust the ambient brightness, obtain image color display data, obtain color display coordinate information based on the color space coordinate system and the image color display data, and obtain color coordinate distance information based on the color display coordinate information and the standard color gamut reference coordinate information; The second test unit is used to display the color test image based on the LED display screen according to the ambient brightness test set, obtain color display test data under different ambient brightness, obtain color display test coordinate information based on the color display test data based on the color space coordinate system, and obtain color test coordinate distance information based on the color display test coordinate information and the standard color gamut reference coordinate information.

[0037] In summary, the advantages of the present invention are: obtaining ambient brightness adjustment range information through the maximum brightness information and the minimum brightness information of the display screen, analyzing the adjustable ambient brightness range of the display screen through the ambient brightness adjustment range information, thereby improving the brightness adjustment efficiency of the display screen, obtaining a display screen brightness adjustment model through an ambient brightness test set, thereby improving the accuracy of display screen brightness adjustment, and obtaining display screen merged area information by merging areas whose display screen brightness difference is less than the brightness recognition feature value, thereby avoiding the reduction of visual effects caused by the incompatibility with the ambient brightness when directly adjusting the overall brightness of the display screen, and reducing the difference in image display effects caused by the difference in brightness of the display screen area, and analyzing the refresh rate of the display screen through the pixel movement speed information, thereby improving image fluency and ensuring the stability and reliability of the display screen.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent control method for LED display screen based on feature information recognition, characterized in that: include: Acquire LED display screen structure information, wherein the LED display screen structure information includes sensor structure information and display structure information; Acquire ambient light information according to the sensor structure information, wherein the ambient light information indicates the ambient light condition corresponding to the LED display screen area; According to the display structure information, the maximum brightness information and the minimum brightness information of the display screen are obtained; Obtaining the ambient brightness adjustment range information based on the maximum brightness information and the minimum brightness information of the display screen; According to the ambient brightness adjustment range information, an ambient brightness test set is obtained; According to the environmental brightness test set, a display brightness adjustment model is obtained; Obtaining display screen brightness adjustment information according to the display screen brightness adjustment model and ambient light information; Acquire information about content to be displayed, wherein the information about content to be displayed includes image information and video data to be displayed on the LED display screen; According to the content information to be displayed, based on the optical flow method, pixel movement speed information is obtained, where the pixel movement speed information represents the movement speed of the same pixel point in the image; According to the pixel movement speed information, the display refresh rate setting information is obtained; The display screen is adjusted according to the display screen refresh rate setting information and the display screen brightness adjustment information.

2. According to claim 1, a LED display screen intelligent control method based on feature information recognition is characterized in that: The step of obtaining the ambient brightness adjustment range information according to the maximum brightness information and the minimum brightness information of the display screen specifically includes: According to the structure information of the LED display screen, obtain the standard color gamut information of the display screen; According to the standard color gamut information of the display screen, standard color gamut reference coordinate information is obtained, wherein the standard color gamut reference coordinate information represents the coordinates of the standard color gamut reference color of the display screen in the color space coordinate system; Acquire color test image information, where the color test image is a display screen test image of three reference colors: red, green, and blue; According to the color test image information, the image is displayed based on the LED display screen; Based on the maximum brightness information and the minimum brightness information of the display screen, the external light source is used as the ambient brightness source to adjust the ambient brightness and obtain the image color display data; Based on the color space coordinate system, according to the image color display data, the color display coordinate information is obtained; Obtaining color coordinate distance information according to the color display coordinate information and the standard color gamut reference coordinate information; Based on the color difference recognition analysis of human eyes, the color coordinate distance threshold is obtained; According to the color coordinate distance information and the color coordinate distance threshold, the ambient brightness adjustment range information is obtained.

3. According to claim 2, a LED display screen intelligent control method based on feature information recognition is characterized in that: The step of obtaining the ambient brightness adjustment range information according to the color coordinate distance information and the color coordinate distance threshold specifically includes: According to the maximum brightness information of the display screen, set the LED display screen to the maximum brightness; The ambient brightness is increased based on the external light source until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the maximum adjusted ambient brightness; According to the minimum brightness information of the display screen, set the LED display screen to the minimum brightness; Based on the external light source, the ambient brightness is reduced until the color coordinate distance exceeds the color coordinate distance threshold, and the ambient brightness at this time is used as the minimum adjusted ambient brightness; According to the maximum adjustable ambient brightness and the minimum adjustable ambient brightness, obtain ambient brightness adjustment range information; Wherein, the color coordinate distance is: Where E is the color coordinate distance, represents the color display coordinates of the i-th base color, Represents the standard color gamut reference coordinates of the i-th reference color.

4. According to the LED display screen intelligent control method based on feature information recognition according to claim 1, it is characterized in that: The step of obtaining a display screen brightness adjustment model according to the ambient brightness test set specifically includes: According to the LED display screen structure information, conventional environment brightness information is obtained, where the conventional environment brightness information represents the average value of the environment brightness in the conventional application environment of the LED display screen; Obtaining an ambient brightness difference coefficient according to the ambient brightness adjustment range information and the conventional ambient brightness information; According to the ambient brightness difference coefficient, obtain the ambient brightness reference value; The ambient brightness reference is used as the ambient brightness difference value to divide the ambient brightness adjustment range, and an ambient brightness test set is obtained, wherein the ambient brightness test set includes a plurality of ambient brightness data, and the difference between adjacent ambient brightnesses is the ambient brightness reference; Among them, if the ambient brightness difference coefficient , then the ambient brightness reference is ,like or , then the ambient brightness reference is ; Obtaining color test image information and standard color gamut reference coordinate information; According to the environmental brightness test set, the color test image is displayed based on the LED display screen to obtain the color display test data under different environmental brightness; Based on the color space coordinate system and according to the color display test data, color display test coordinate information is obtained; Obtaining color test coordinate distance information according to color display test coordinate information and standard color gamut reference coordinate information; Adjust the brightness of the display screen until the color test coordinate distance reaches the minimum, and obtain the optimal brightness information of the display screen corresponding to the ambient brightness; Match the ambient brightness test set with the corresponding display screen optimal brightness information to obtain a display screen brightness adjustment data set; According to the display brightness adjustment data set, the existing brightness adjustment model is trained to obtain the display brightness adjustment model; The calculation formula of the ambient brightness difference coefficient is: In the formula, is the ambient brightness difference coefficient, For normal ambient brightness, is the maximum adjusted ambient brightness in the ambient brightness adjustment range, The minimum adjusted ambient brightness in the ambient brightness adjustment range; The display screen brightness adjustment model is specifically as follows: Where L is the brightness of the display, Indicates the ambient brightness The display screen has the best brightness. is the ambient brightness, represents the brightness variation coefficient, where ,but ,like ,but , is the model characteristic coefficient, For correction items.

5. The LED display screen intelligent control method based on feature information recognition according to claim 1 is characterized in that: The obtaining display screen brightness adjustment information according to the display screen brightness adjustment model and the ambient light information specifically includes: According to the ambient light information, obtain the ambient brightness information; Divide the display screen into regions, divide the display screen regions with the same ambient brightness into the same region, and obtain the ambient brightness information of the display screen regions; According to the display area ambient brightness information, based on the display brightness adjustment model, the display brightness information corresponding to the ambient brightness of each area is obtained; According to the ambient brightness information, the brightness deviation coefficient is obtained; Obtaining a brightness recognition feature value according to the brightness deviation coefficient and the display brightness information; According to the display brightness information, the areas where the display brightness difference is less than the brightness identification feature value are merged to obtain the display merge area information, and the average display brightness in each display merge area is used as the display brightness of the display merge area; According to the display screen merge area information, obtain the display screen brightness information of the merged area; Acquire display screen brightness adjustment information according to the display screen brightness information of the merged area, wherein the display screen brightness adjustment information is used to adjust the display screen brightness; The calculation formula of the brightness deviation coefficient is: Where k is the brightness deviation coefficient, is the maximum ambient brightness of the display area, is the minimum ambient brightness of the display area, is the maximum adjusted ambient brightness in the ambient brightness adjustment range, The minimum adjusted ambient brightness in the ambient brightness adjustment range; The brightness identification characteristic value is specifically: In the formula, Identify eigenvalues ​​for brightness, It is the maximum brightness of the display screen corresponding to the ambient brightness of the display screen area.

6. The LED display screen intelligent control method based on feature information recognition according to claim 1 is characterized in that: The obtaining display screen refresh rate setting information according to the pixel movement speed information specifically includes: According to the LED display screen structure information, obtain the basic refresh rate information of the display screen; Based on the analysis of the application scenario of the LED display screen, the visual angle information and the observation distance information are obtained, wherein the visual angle information indicates the minimum resolvable angle of the LED display screen, and the observation distance information indicates the viewing distance when the LED display screen is used; Obtaining the visual resolution limit value according to the visual angle information and the observation distance information; Obtain the pixel movement speed threshold according to the visual resolution limit value and the basic refresh rate information of the display screen; According to the pixel movement speed information and the pixel movement speed threshold, determine whether to adjust the refresh rate of the display screen; if not, keep the basic refresh rate of the display screen unchanged; if yes, obtain the target refresh rate information of the display screen according to the pixel movement speed information and the visual resolution limit value; According to the display screen target refresh rate information, obtain the display screen refresh rate setting information; The visual resolution limit value is specifically: In the formula, is the visual resolution limit, is the observation distance, For visual perspective; The pixel movement speed threshold is specifically: In the formula, is the pixel moving speed threshold, Is the basic refresh rate of the display; The target refresh rate of the display screen is specifically: In the formula, is the target refresh rate of the display, is the pixel moving speed, Indicates the maximum refresh rate of the display.

7. An intelligent control system for LED display screen based on feature information recognition, used to implement the control method according to any one of claims 1 to 6, characterized in that: include: A main control module, the main control module is used to obtain environmental brightness adjustment range information according to color coordinate distance information and color coordinate distance threshold, match the environmental brightness test set with the corresponding display screen optimal brightness information, obtain a display screen brightness adjustment data set, train an existing brightness adjustment model according to the display screen brightness adjustment data set, obtain a display screen brightness adjustment model, divide the display screen into regions, obtain display screen region environmental brightness information, obtain display screen brightness adjustment information according to the merged region display screen brightness information, determine whether to adjust the display screen refresh rate according to the pixel movement speed information and the pixel movement speed threshold, obtain the display screen target refresh rate information according to the pixel movement speed information and the visual resolution limit value, and obtain the display screen refresh rate setting information according to the display screen target refresh rate information; An information acquisition module, the information acquisition module is used to acquire the LED display screen structure information, sensor structure information and display structure information, acquire the ambient light information according to the sensor structure information, acquire the display screen maximum brightness information and the display screen minimum brightness information according to the display structure information, acquire the content information to be displayed, and acquire the pixel movement speed information according to the content information to be displayed based on the optical flow method; A display screen test module, wherein the display screen test module is used to display an image based on an LED display screen according to color test image information, take the maximum brightness information of the display screen and the minimum brightness information of the display screen as a reference, take an external light source as an ambient brightness source, adjust the ambient brightness, obtain image color display data, obtain color display coordinate information based on a color space coordinate system and the image color display data, obtain color coordinate distance information based on the color display coordinate information and the standard color gamut reference coordinate information, display the color test image based on an LED display screen according to an ambient brightness test set, obtain color display test data under different ambient brightnesses, obtain color display test coordinate information based on a color space coordinate system and the color display test data, and obtain color test coordinate distance information based on the color display test coordinate information and the standard color gamut reference coordinate information; An evaluation module is used to obtain conventional ambient brightness information based on LED display screen structure information, obtain ambient brightness difference coefficient based on ambient brightness adjustment range information and conventional ambient brightness information, obtain ambient brightness reference value based on ambient brightness difference coefficient, obtain brightness deviation coefficient based on ambient brightness information, and obtain brightness recognition feature value based on brightness deviation coefficient and display screen brightness information.

8. The LED display screen intelligent control system based on feature information recognition according to claim 7 is characterized in that: The main control module specifically includes: A control unit, the control unit is used to divide the display screen into regions, obtain the display screen area environment brightness information, obtain the display screen brightness adjustment information according to the merged area display screen brightness information, determine whether to adjust the display screen refresh rate according to the pixel movement speed information and the pixel movement speed threshold, obtain the display screen target refresh rate information according to the pixel movement speed information and the visual resolution limit value, and obtain the display screen refresh rate setting information according to the display screen target refresh rate information; An information receiving unit, which interacts with the information acquisition module and the display screen testing module to receive data and transmit it to the model training unit; The model training unit is used to obtain the ambient brightness adjustment range information according to the color coordinate distance information and the color coordinate distance threshold, match the ambient brightness test set with the corresponding display screen optimal brightness information, obtain the display screen brightness adjustment data set, and train the existing brightness adjustment model according to the display screen brightness adjustment data set to obtain the display screen brightness adjustment model.

9. The LED display screen intelligent control system based on feature information recognition according to claim 7 is characterized in that: The information acquisition module specifically includes: A first acquisition unit, the first acquisition unit is used to acquire LED display screen structure information, sensor structure information and display structure information, and acquire ambient light information according to the sensor structure information; The second acquisition unit is used to acquire the maximum brightness information and the minimum brightness information of the display screen according to the display structure information, acquire the content information to be displayed, and acquire the pixel movement speed information based on the optical flow method according to the content information to be displayed.

10. The LED display screen intelligent control system based on feature information recognition according to claim 7, characterized in that: The display screen test module specifically includes: A first testing unit, the first testing unit is used to display an image based on an LED display screen according to color test image information, take the maximum brightness information and the minimum brightness information of the display screen as a reference, take an external light source as an ambient brightness source, adjust the ambient brightness, obtain image color display data, obtain color display coordinate information based on the color space coordinate system and the image color display data, and obtain color coordinate distance information based on the color display coordinate information and the standard color gamut reference coordinate information; The second test unit is used to display the color test image based on the LED display screen according to the ambient brightness test set, obtain color display test data under different ambient brightness, obtain color display test coordinate information based on the color display test data based on the color space coordinate system, and obtain color test coordinate distance information based on the color display test coordinate information and the standard color gamut reference coordinate information.

Images