CN116935787B - Display screen brightness and chroma correction method based on conference focus prediction - Google Patents
Display screen brightness and chroma correction method based on conference focus prediction Download PDFInfo
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Abstract
The invention relates to the technical field of display screen brightness and color correction, in particular to a display screen brightness and color correction method based on conference focus prediction, which comprises the following steps that S1, a data analysis module determines display screen brightness according to an ambient light evaluation value; s2, the data analysis module determines a display screen chromaticity setting method according to the complexity of the ambient light; step S3, the data analysis module determines the chromaticity of the display screen; s4, the data analysis module determines a correction method for the brightness of the display screen according to the distance between the display screen and the user; and S5, the data analysis module determines a display screen brightness adjustment coefficient to adjust the display screen brightness or to correct the display screen regional brightness, and determines a display screen regional brightness correction strategy according to the content ratio of the focal point of the display screen.
Description
Technical Field
The invention relates to the technical field of display screen brightness and color correction, in particular to a display screen brightness and color correction method based on conference focus prediction.
Background
The setting of parameters of the display screen mainly depends on manual experience to adjust, and high precision and automation are difficult to realize, for example, when the brightness of the display screen is set, whether the ambient light is proper is judged mainly according to manual subjective feeling, the method cannot accurately measure the ambient light brightness and accurately set the optimal brightness according to the ambient light brightness, the brightness of the display screen is difficult to adjust in real time according to the change of the ambient light, when the chromaticity of the display screen is set, the method is mainly selected according to a mode provided by a manufacturer, the influence of the color temperature of the ambient light is not considered, the method is not adjusted according to personal color preference of a user, and personalized optimization of the color effect is difficult to realize.
Chinese patent publication No.: CN103594056B discloses a brightness correction method of LED display screen; the brightness correction method comprises the following steps of: reading brightness and chrominance data of a plurality of LED pixel points of the first LED display module and a plurality of LED pixel points of the second LED display module, wherein the brightness and chrominance data of the plurality of LED pixel points of the first LED display module and the plurality of LED pixel points of the second display module are respectively stored in a memory of the first LED display module and a memory of the second display module in advance or are respectively stored in a database in association with identification numbers of the first LED display module and the second LED display module in advance, and are not obtained by measuring the LED display screen on site by using a brightness and chrominance acquisition device; analyzing the read brightness color data of the plurality of LED pixel points of the first LED display module and the plurality of LED pixel points of the second LED display module to obtain common brightness color values of the plurality of LED pixel points of the first LED display module and the plurality of LED pixel points of the second LED display module, and setting a brightness color correction target value of the LED display screen according to the common brightness color values; and calculating a pixel point correction coefficient of the first LED display module according to the read brightness and color data and the brightness and color correction target value of the plurality of LED pixel points of the first LED display module.
It follows that the prior art has the following problems: due to the fact that the brightness correction accuracy of the display screen is not high caused by insufficient consideration of the ambient light factors, the display effect is poor.
Disclosure of Invention
Therefore, the invention provides a display screen brightness correction method based on conference focus prediction, which is used for solving the problems of low display screen brightness correction precision and poor display effect in the prior art.
In order to achieve the above object, in one aspect, the present invention provides a method for correcting brightness and chrominance of a display screen based on conference focus prediction, including:
step S1, a data analysis module determines the brightness of a display screen according to an ambient light evaluation value P;
Step S2, the data analysis module determines a display screen chromaticity setting method according to the ambient light complexity F;
Step S3, when the data analysis module determines that the display screen chromaticity setting method is a first setting method, the data analysis module determines the display screen chromaticity according to the angle between the natural light and the display; when the data analysis module determines that the display screen chromaticity setting method is a second setting method, the data analysis module determines the display screen chromaticity according to the artificial light color temperature;
s4, the data analysis module determines a correction method for the brightness of the display screen according to the distance between the display screen and the user;
Step S5, when the data analysis module determines that the correction method for the brightness of the display screen is a first correction method, the data analysis module determines a brightness adjustment coefficient of the display screen according to the focus deviation degree X of the eye sight so as to adjust the brightness of the display screen; when the data analysis module determines that the correction method for the brightness of the display screen is a second correction method, the data analysis module determines to correct the brightness of the display screen area and determines a display screen area brightness correction strategy according to the content ratio R of the focal point of the display screen.
Further, the calculation formula of the ambient light evaluation value P is as follows
Wherein I α represents the illuminance value of the light irradiated on the display screen at an angle of α degrees with respect to the display screen.
Further, the data analysis module determines a plurality of brightnesses of the display screen according to a comparison result of the ambient light evaluation value P and a preset ambient light evaluation value;
Further, the data analysis module determines a plurality of setting methods of the chromaticity of the display screen according to the ambient light complexity F and the preset ambient light complexity, wherein the setting methods comprise a first setting method of the chromaticity of the display screen according to the natural light angle by the data analysis module and a second setting method of the chromaticity of the display screen according to the artificial light color temperature by the data analysis module;
The calculation formula of the ambient light complexity F is F=θ1/θ2, wherein θ1 represents the intensity of 415-455nm light in the ambient light, and θ2 represents the intensity of 40-400nm light in the ambient light.
Further, when the data analysis module determines that the display screen chromaticity setting method is the first setting method, the data analysis module determines that the display screen chromaticity is the first chromaticity according to the angle between the natural light and the display being smaller than or equal to the preset angle, and determines that the display screen chromaticity is the second chromaticity according to the angle between the natural light and the display being larger than the preset angle.
Further, when the data analysis module determines that the display screen chromaticity setting method is the second setting method, the data analysis module determines that the chromaticity of the display screen is the third chromaticity according to the artificial light color temperature being smaller than or equal to the preset artificial light color temperature, and determines that the chromaticity of the display screen is the fourth chromaticity according to the artificial light color temperature being larger than the preset artificial light color temperature.
Further, the data analysis module determines a plurality of correction methods for the brightness of the display screen according to the comparison result of the distance between the display screen and the user and the preset distance, and the correction methods comprise a first correction method for determining a display screen brightness adjustment coefficient according to the eye focus deviation degree so as to adjust the brightness of the display screen and a second correction method for determining a display screen area brightness correction strategy according to the display screen picture focus content.
Further, when the data analysis module determines that the correction method for the brightness of the display screen is a first correction method, the data analysis module determines a plurality of display screen brightness adjustment coefficients according to the comparison result of the human eye sight focus deviation degree X and the preset human eye sight focus deviation degree so as to adjust the brightness of the display screen;
The calculation formula of the eye sight focus deviation degree X is X=2×arctan (beta/L), wherein beta represents an included angle between the eye sight and the display direction.
Further, when the data analysis module determines that the correction method for the brightness of the display screen is a second correction method, the data analysis module determines to correct the brightness of the display screen area, and determines a plurality of correction strategies for the brightness of the display screen area according to the comparison result of the focal content ratio R of the display screen image and the focal content ratio of the preset display screen image, wherein the correction strategies comprise a first correction strategy for adjusting the brightness of a portrait area in the display screen image and a second correction strategy for adjusting the display screen image into a gray mode;
The calculation formula of the focal content ratio R of the display screen picture is R= (W1-W2)/W0, wherein W1 represents the area of the Chinese image area in the display screen picture, W2 represents the area of the human image area in the display screen picture, and W0 represents the total area of the display screen picture.
Further, when the data analysis module determines that the correction strategy for the brightness of the display screen area is the first correction strategy, the data analysis module calculates a first relative difference between the focal content R of the display screen image and the focal content of the preset display screen image, and determines a plurality of adjustment coefficients of the brightness of the portrait area in the display screen image according to the comparison result of the first relative difference and the preset first relative difference so as to adjust the brightness of the image area in the display screen image.
Compared with the prior art, the method has the beneficial effects that the influence of the illuminance of the light on the viewing experience of the display screen is measured by calculating the evaluation value of the ambient light, and the brightness of the display screen is set more comprehensively and accurately by taking the factors that the light which forms different alpha degrees with the display screen in the ambient light is easy to form reflection on the display screen into consideration.
Further, the brightness of the display screen is determined according to the ambient light evaluation value so as to achieve the optimal display effect, and the brightness of the display screen is improved under the condition that the ambient light is brighter and the light reflection is stronger so as to ensure that the picture is clear and easy to see, and more comfortable visual experience is provided.
Further, the invention determines the complexity of the ambient light by the ratio of the intensity of 415-455nm light to the intensity of 40-400nm light in the ambient light, the 415-455nm light in the artificial light is higher than the natural light content, and the 40-400nm light in the natural light is higher than the artificial light content, and the complexity of the ambient light is determined by calculation to accurately reflect various lights in the ambient light.
Further, the invention selects a more proper chromaticity setting method according to the complexity of the ambient light, under the condition that the ambient light has more natural light, the chromaticity is set according to the angle of the natural light to realize the most natural and comfortable color effect, under the condition that the ambient light has artificial light, the chromaticity is set according to the artificial light color temperature to adapt to the artificial light source, and the color precision is ensured.
Further, the invention selects the most suitable chromaticity according to the incidence angle of the natural light, so as to realize the most comfortable color experience, when the natural light is incident at a smaller angle, the reflection of light can influence the color accuracy, the chromaticity of 100% sRGB is selected to provide the most real color effect, when the natural light is incident at a larger angle, the chromaticity of 90% sRGB is selected to alleviate the problem of color supersaturation, and the visual comfort is ensured.
Further, the invention selects the most proper chromaticity according to the artificial light color temperature to realize the most accurate color reproduction, when the artificial light color temperature is lower, the chromaticity of 100% DI-P3 is selected to provide the color effect of wide color gamut, and when the artificial light color temperature is higher, the chromaticity of 90% DI-P3 is selected to avoid visual fatigue.
Further, the invention selects a more proper brightness correction method according to the watching distance of the user, when the distance is closer, the sight of the user is easier to capture, the brightness is adjusted according to the focus deviation degree of the sight so as to provide more comfortable visual experience, and when the distance is farther, the local brightness is adjusted according to the focus content of the display screen picture so as to improve the definition of the image and the detail recognition degree.
Further, the invention selects the most suitable brightness adjustment coefficient according to the degree of deviation of the sight focus, so as to realize the best brightness effect, when the degree of deviation of the sight is smaller, the larger adjustment coefficient is selected to provide higher brightness, so that the picture of the display screen is more clear and visible, and when the degree of deviation of the sight is larger, the smaller adjustment coefficient is selected to provide lower brightness, thereby saving the power resource.
Further, the invention selects a proper brightness correction strategy according to the screen content to realize the optimal image definition, when the area of the portrait area is larger, the brightness of the portrait area is selected and adjusted to make the portrait clearer, the watching requirement of a user is met, and when the area of the text area is larger, the gray mode is selected to read the text, so that the eyes are protected.
Further, the invention automatically selects the proper brightness adjustment coefficient according to the relative difference to realize the best image quality of the portrait area, when the relative difference is smaller, the smaller adjustment coefficient is selected to moderately improve the brightness of the portrait area, so that the portrait is clearer, and when the relative difference is larger, the larger adjustment coefficient is selected to remarkably improve the brightness of the portrait area, so that the portrait area becomes the focus of the image.
Drawings
Fig. 1 is a flowchart of a method for correcting brightness and chrominance of a display screen based on conference focus prediction according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
Referring to fig. 1, a flowchart of a method for correcting brightness and chrominance of a display screen based on conference focus prediction according to an embodiment of the present invention is shown;
the display screen brightness and color correction method based on conference focus prediction provided by the embodiment of the invention comprises the following steps:
step S1, a data analysis module determines the brightness of a display screen according to an ambient light evaluation value P;
Step S2, the data analysis module determines a display screen chromaticity setting method according to the ambient light complexity F;
Step S3, when the data analysis module determines that the display screen chromaticity setting method is a first setting method, the data analysis module determines the display screen chromaticity according to an angle J between natural light and a display; when the data analysis module determines that the display screen chromaticity setting method is a second setting method, the data analysis module determines the display screen chromaticity according to the artificial light color temperature G;
S4, the data analysis module determines a correction method for the brightness of the display screen according to the distance L between the display screen and the user;
Step S5, when the data analysis module determines that the correction method for the brightness of the display screen is a first correction method, the data analysis module determines a brightness adjustment coefficient of the display screen according to the eye sight focus deviation X; when the data analysis module determines that the correction method for the brightness of the display screen is a second correction method, the data analysis module determines to correct the brightness of the display screen area and determines a display screen area brightness correction strategy according to the content ratio R of the focal point of the display screen.
Specifically, the calculation formula of the ambient light evaluation value P is
Wherein I α represents the illuminance value of the light irradiated on the display screen at an angle of α degrees with respect to the display screen.
Specifically, the influence of the illuminance of the light on the viewing experience of the display screen is measured by calculating the evaluation value P of the ambient light, and the brightness of the display screen is set more comprehensively and accurately by taking the factor that the light which forms different alpha angles with the display screen in the ambient light is easy to form reflection on the display screen into consideration.
Specifically, the data analysis module determines the brightness Ti of the display screen according to the comparison result of the ambient light evaluation value P and the preset ambient light evaluation value P0;
If P is less than or equal to P0, the data analysis module determines that the brightness of the display screen is the first brightness T1;
If P is more than P0, the data analysis module determines that the brightness of the display screen is the second brightness T2.
Wherein, the first luminance T1 takes a value of 300 nits, and the second luminance T2 takes a value of 600 nits.
In the embodiment of the invention, the preset ambient light evaluation value P0 is obtained by calculating the ambient light evaluation value P for a plurality of times under the condition that the illuminance is 100000lx natural light, and taking the average value.
Specifically, the invention determines the brightness of the display screen according to the ambient light evaluation value so as to realize the optimal display effect, and improves the brightness of the display screen to ensure that the picture is clear and easy to see under the condition that the ambient light is brighter and the reflection is stronger, thereby providing more comfortable visual experience.
Specifically, the calculation formula of the ambient light complexity F is
F＝θ1/θ2
Wherein θ1 represents the intensity of 415-455nm light in ambient light, and θ2 represents the intensity of 40-400nm light in ambient light.
Specifically, the invention determines the complexity of the environment light by the ratio of the intensity of 415-455nm light to the intensity of 40-400nm light in the environment light, wherein 415-455nm light in the artificial light is higher than the natural light content, and 40-400nm light in the natural light is higher than the artificial light content, and the complexity of the environment light is determined by calculating to accurately reflect various light in the environment light.
Specifically, the data analysis module determines a display screen chromaticity setting method according to the ambient light complexity F and the preset ambient light complexity F0;
If F is less than or equal to F0, the data analysis module determines that the display screen chromaticity setting method is a first setting method;
If F is more than F0, the data analysis module determines that the display screen chromaticity setting method is a second setting method.
The first setting method is that the data analysis module determines the chromaticity of the display screen according to the natural light angle J, and the second setting method is that the data analysis module determines the chromaticity of the display screen according to the artificial light color temperature G.
In the embodiment of the present invention, the preset ambient light complexity F0 takes a value of 0.5, where the preset ambient light complexity F0 is obtained under the condition that the intensity of 415-455nm light in ambient light is the same as the intensity of 40-400nm light, and a person skilled in the art can adjust the preset ambient light complexity F0 according to specific situations.
Specifically, the invention selects a more proper chromaticity setting method according to the complexity of the ambient light, under the condition that the ambient light has more natural light, the chromaticity is set according to the angle of the natural light to realize the most natural and comfortable color effect, under the condition that the ambient light has artificial light, the chromaticity is set according to the artificial light color temperature to adapt to the artificial light source, and the color precision is ensured.
Specifically, when the data analysis module determines that the display screen chromaticity setting method is the first setting method, the data analysis module determines the display screen chromaticity according to a comparison result of an angle J between natural light and a display and a preset angle J0;
if J is less than or equal to J0, the data analysis module determines that the chromaticity of the display screen is a first chromaticity;
and if J is more than J0, the data analysis module determines that the chromaticity of the display screen is the second chromaticity.
Wherein the first chromaticity is 100% srgb, and the second chromaticity is 90% srgb.
In the embodiment of the invention, the preset angle J0 takes a value of 45 degrees, and a person skilled in the art can adjust the preset angle J0 according to specific conditions.
Specifically, the invention selects the most suitable chromaticity according to the incidence angle of natural light, so as to realize the most comfortable color experience, when the natural light is incident at a smaller angle, the reflection of light can influence the color accuracy, the chromaticity of 100% sRGB is selected to provide the most realistic color effect, and when the natural light is incident at a larger angle, the chromaticity of 90% sRGB is selected to alleviate the problem of color supersaturation, so that the visual comfort is ensured.
Specifically, when the data analysis module determines that the display screen chromaticity setting method is the second setting method, the data analysis module determines the display screen chromaticity according to the artificial light color temperature G and the preset artificial light color temperature G0;
If G is less than or equal to G0, the data analysis module determines that the chromaticity of the display screen is a third chromaticity;
and if G is more than G0, the data analysis module determines that the chromaticity of the display screen is fourth chromaticity.
Wherein the third chromaticity is 100% DI-P3, and the fourth chromaticity is 90% DI-P3.
In the embodiment of the invention, the preset artificial light color temperature G0 is 5000K, and a person skilled in the art can adjust the preset artificial light color temperature G0 according to specific conditions.
Specifically, the invention selects the most proper chromaticity according to the artificial light color temperature, realizes the most accurate color reproduction, selects the chromaticity of 100% DI-P3 to provide the color effect of wide color gamut when the artificial light color temperature is lower, and selects the chromaticity of 90% DI-P3 to avoid visual fatigue when the artificial light color temperature is higher.
Specifically, the data analysis module determines a correction method for the brightness of the display screen according to the comparison result of the distance L between the display screen and the user and the preset distance L0;
if L is less than or equal to L0, the data analysis module determines that the correction method for the brightness of the display screen is a first correction method;
if L is more than L0, the data analysis module determines that the correction method for the brightness of the display screen is a second correction method.
The first correction method is that the data analysis module determines a display screen brightness adjustment coefficient according to the eye sight focus deviation degree so as to adjust the display screen brightness; and the second correction method is used for determining and correcting the brightness of the display screen area for the data analysis module, and determining a display screen area brightness correction strategy according to the focal content of the display screen.
In the embodiment of the invention, the preset distance L0 takes a value of 3m, and a person skilled in the art can adjust the preset distance L0 according to specific conditions.
Specifically, the invention selects a more proper brightness correction method according to the watching distance of the user, when the distance is closer, the sight of the user is easier to capture, the brightness is adjusted according to the focus deviation degree of the sight so as to provide more comfortable visual experience, and when the distance is farther, the local brightness is adjusted according to the focus content of the display screen picture so as to improve the definition of the image and the detail recognition degree.
Specifically, the calculation formula of the eye gaze focus deviation degree X is as follows
X＝2×arctan(β/L)
Wherein β represents the angle between the line of sight of the human eye and the display direction.
Specifically, in the step S5, when the data analysis module determines that the correction method for the brightness of the display screen is the first correction method, the data analysis module determines a display screen brightness adjustment coefficient ki according to a comparison result of the eye gaze focus deviation degree X and a preset eye gaze focus deviation degree to adjust the brightness of the display screen, where the data analysis module is provided with a first preset eye gaze focus deviation degree X1, a second preset eye gaze focus deviation degree X2, a first adjustment coefficient k1, a second adjustment coefficient k2, and a third adjustment coefficient k3, where X1 is less than X2, and k1 is greater than k2 and greater than k3;
If X is less than or equal to X1, the data analysis module determines that the brightness of the display screen is adjusted by a first adjustment coefficient k 1;
If X1 is more than X and less than or equal to X2, the data analysis module determines that the brightness of the display screen is adjusted by a second adjustment coefficient k 2;
If X is more than X2, the data analysis module determines to adjust the brightness of the display screen by a third adjustment coefficient k 3.
Wherein the first adjustment coefficient k1 takes a value of 1.5, the second adjustment coefficient k2 takes a value of 0.9,
And the third adjustment coefficient k3 takes a value of 0.5.
The first brightness of the adjusted display screen is t10=t1×ki, i=1, 2,3, and the second brightness is t20=t2×ki, i=1, 2,3.
In the embodiment of the invention, the first preset human eye sight focus deviation degree X1 is obtained when the included angle between the human eye sight and the display direction is 30 degrees and the distance L between the display screen and the user is 1m, and the second preset human eye sight focus deviation degree X2 is obtained when the included angle between the human eye sight and the display direction is 45 degrees and the distance L between the display screen and the user is 1 m.
Specifically, the invention selects the optimal brightness adjustment coefficient according to the degree of deviation of the sight focus, so as to realize the optimal brightness effect, when the degree of deviation of the sight is smaller, the larger adjustment coefficient is selected to provide higher brightness, so that the picture of the display screen is clearer and more visible, and when the degree of deviation of the sight is larger, the smaller adjustment coefficient is selected to provide lower brightness, thereby saving the power resource.
Specifically, the calculation formula of the focal content ratio R of the display screen picture is as follows
R＝(W1-W2)/W0
Wherein W1 represents the area of the Chinese character region in the display screen picture, W2 represents the area of the portrait region in the display screen picture, and W0 represents the total area of the display screen picture.
Specifically, when the data analysis module determines that the correction method for the brightness of the display screen is a second correction method, the data analysis module determines to correct the brightness of the display screen area, and determines a correction strategy for the brightness of the display screen area according to the comparison result of the focal content ratio R of the display screen picture and the focal content ratio R0 of the preset display screen picture;
If R is less than or equal to R0, the data analysis module determines that the brightness correction strategy for the display screen area is a first correction strategy;
and if R is more than R0, the data analysis module determines that the brightness correction strategy for the display screen area is a second correction strategy.
The first correction strategy is to adjust the brightness of the image area in the display picture, and the second correction strategy is to adjust the display picture to be in a gray mode.
In the embodiment of the invention, the value of the preset display screen picture focal content ratio R0 is 0.3, the preset display screen picture focal content ratio R0 is obtained when the area of the Chinese character area in the display screen picture is one third of the area of the display screen picture of the partial station display screen which is larger than the area of the portrait character area, and the preset display screen picture focal content ratio R0 can be adjusted according to specific conditions by a person skilled in the art.
Specifically, the invention selects a proper brightness correction strategy according to screen content to realize optimal image definition, when the area of a portrait area is larger, the brightness of the portrait area is selected and adjusted to enable the portrait to be clearer, the watching requirement of a user is met, and when the area of a text area is larger, the gray mode is selected to read the text to protect eyes.
Specifically, when the data analysis module determines that the correction strategy for the brightness of the display screen area is the second correction strategy, the data analysis module calculates a first relative difference Δr1 between the focal content R of the display screen and the focal content R0 of the preset display screen, and determines an adjustment coefficient yi of the brightness of the portrait area in the display screen according to the comparison result of the first relative difference Δr1 and the preset first relative difference Δr01 to adjust the brightness of the image area in the display screen, and sets Δr1= (R0-R)/R0;
If DeltaR 1 is less than or equal to DeltaR 01, the data analysis module determines that the brightness of an image area in a display picture is regulated by a first regulating coefficient y 1;
if ΔR1 >. ΔR01, the data analysis module determines to adjust the brightness of the image area in the display frame with a second adjustment factor y 2.
Wherein, the first adjusting coefficient y1 takes the value of 1.2, and the second adjusting coefficient y2 takes the value of 1.4.
The luminance of the adjusted portrait area is t11=t1×yi, i=1, 2,3, or t22=t2×yi, i=1, 2,3.
In the embodiment of the present invention, the value of the first relative difference Δr1 is 1, where the first relative difference Δr1 is obtained when the areas of the text area and the portrait area in the display screen are equal, and a person skilled in the art can adjust the first relative difference Δr1 according to specific situations.
Specifically, the invention automatically selects the proper brightness adjustment coefficient according to the relative difference to realize the best image quality of the portrait area, when the relative difference is smaller, the smaller adjustment coefficient is selected to moderately improve the brightness of the portrait area, so that the portrait is clearer, and when the relative difference is larger, the larger adjustment coefficient is selected to remarkably improve the brightness of the portrait area, so that the portrait area becomes the focus of the image.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The display screen brightness and chroma correction method based on conference focus prediction is characterized by comprising the following steps:
step S1, a data analysis module determines the brightness of a display screen according to an ambient light evaluation value;
S2, the data analysis module determines a display screen chromaticity setting method according to the complexity of the ambient light;
Step S3, when the data analysis module determines that the display screen chromaticity setting method is a first setting method, the data analysis module determines the display screen chromaticity according to the angle between the natural light and the display; when the data analysis module determines that the display screen chromaticity setting method is a second setting method, the data analysis module determines the display screen chromaticity according to the artificial light color temperature;
s4, the data analysis module determines a correction method for the brightness of the display screen according to the distance between the display screen and the user;
Step S5, when the data analysis module determines that the correction method for the brightness of the display screen is a first correction method, the data analysis module determines a display screen brightness adjustment coefficient according to the focus deviation degree of the eye sight so as to adjust the brightness of the display screen; when the data analysis module determines that the correction method for the brightness of the display screen is a second correction method, the data analysis module determines to correct the brightness of the display screen area and determines a display screen area brightness correction strategy according to the content ratio R of the focal point of the display screen;
The calculation formula of the ambient light evaluation value P is as follows
，
Wherein,Between representation and display screenThe illuminance value of the light irradiated on the display screen at the angle;
the calculation formula of the ambient light complexity F is F=θ1/θ2, wherein θ1 represents the intensity of 415-455nm light in the ambient light, and θ2 represents the intensity of 40-400nm light in the ambient light.
2. The conference focus prediction-based display screen brightness correction method according to claim 1, wherein the data analysis module determines a plurality of brightnesses of the display screen according to a comparison result of the ambient light evaluation value and a preset ambient light evaluation value, and the plurality of brightnesses include a first brightness determined when the ambient light evaluation value is less than or equal to the preset ambient light evaluation value and a second brightness determined when the ambient light evaluation value is greater than the preset ambient light evaluation value.
3. The method for correcting brightness and color of a display screen based on conference focus prediction according to claim 2, wherein the data analysis module determines a plurality of setting methods for the chromaticity of the display screen according to the complexity of the ambient light and the complexity of the preset ambient light, and the plurality of setting methods includes a first setting method for the chromaticity of the display screen by the data analysis module according to the angle of the natural light and a second setting method for the chromaticity of the display screen by the data analysis module according to the color temperature of the artificial light.
4. The conference focus prediction-based display screen brightness and color correction method according to claim 3, wherein when the data analysis module determines that the display screen color setting method is the first setting method, the data analysis module determines that the color of the display screen in a state where the angle between the natural light and the display is less than or equal to a preset angle is the first color, and determines that the color of the display screen in a state where the angle between the natural light and the display is greater than the preset angle is the second color.
5. The method according to claim 4, wherein when the data analysis module determines that the display screen chromaticity setting method is the second setting method, the data analysis module determines that the chromaticity of the display screen in the artificial light color temperature state is less than or equal to the preset artificial light color temperature state is the third chromaticity, and determines that the chromaticity of the display screen in the artificial light color temperature state is greater than the preset artificial light color temperature state is the fourth chromaticity.
6. The method according to claim 5, wherein when the data analysis module determines a plurality of correction methods for brightness of the display screen according to a comparison result of a distance between the display screen and a user and a preset distance, the correction methods include a first correction method in which the data analysis module determines a brightness adjustment coefficient of the display screen according to a focus deviation of human eyes so as to adjust brightness of the display screen, and a second correction method in which the data analysis module determines a brightness correction policy for the display screen according to a focus content of the display screen.
7. The conference focus prediction-based display screen brightness correction method according to claim 6, wherein when the data analysis module determines that the correction method for display screen brightness is a first correction method, the data analysis module determines a plurality of display screen brightness adjustment coefficients according to a comparison result of a human eye line of sight focus deviation degree and a preset human eye line of sight focus deviation degree to adjust display screen brightness, the plurality of display screen brightness adjustment coefficients include a first adjustment coefficient determined when the human eye line of sight focus deviation degree is less than or equal to a first preset human eye line of sight focus deviation degree, a second adjustment coefficient determined when the human eye line of sight focus deviation degree is greater than the first preset human eye line of sight focus deviation degree and less than or equal to a second preset human eye line of sight focus deviation degree, and a third adjustment coefficient determined when the human eye line of sight focus deviation degree is greater than the second preset human eye line of sight focus deviation degree;
The degree of deviation of the focus of the human eye is determined by the included angle between the human eye and the direction of the display, and the distance between the display screen and the user.
8. The conference focus prediction based display screen brightness and color correction method according to claim 7, wherein when the data analysis module determines that the correction method for display screen brightness is the second correction method, the data analysis module determines to correct display screen area brightness, and determines a plurality of correction strategies for display screen area brightness according to a comparison result of a display screen focus content ratio and a preset display screen focus content ratio, the plurality of correction strategies including a first correction strategy for adjusting brightness of a portrait area in a display screen and a second correction strategy for adjusting the adjusted display screen to a gray mode;
The ratio of the focal content of the display screen picture is determined by the area of the Chinese character area in the display screen picture, the area of the human figure area in the display screen picture and the total area of the display screen picture.
9. The conference focus prediction based display screen brightness and color correction method according to claim 8, wherein when the data analysis module determines that the display screen area brightness correction policy is a first correction policy, the data analysis module calculates a first relative difference between the display screen focus content and a preset display screen focus content, and determines a plurality of adjustment coefficients of brightness of a portrait area in the display screen according to a comparison result of the first relative difference and the preset first relative difference to adjust brightness of an image area in the display screen, wherein the plurality of adjustment coefficients include a first adjustment coefficient determined when the first relative difference is less than or equal to the preset first relative difference and a second adjustment coefficient determined when the first relative difference is greater than the preset first relative difference.
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| CN101055700A (en) * | 2006-04-13 | 2007-10-17 | 乐金电子（昆山）电脑有限公司 | Background lamp adjusting device of LCD and its method |
| CN110675839A (en) * | 2019-10-11 | 2020-01-10 | Oppo广东移动通信有限公司 | Screen adjusting method, electronic equipment and related device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101055700A (en) * | 2006-04-13 | 2007-10-17 | 乐金电子（昆山）电脑有限公司 | Background lamp adjusting device of LCD and its method |
| CN110675839A (en) * | 2019-10-11 | 2020-01-10 | Oppo广东移动通信有限公司 | Screen adjusting method, electronic equipment and related device |
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