WO2023000631A1 - Method and apparatus for determining correction coefficient of display screen light point, and computer device - Google Patents

Abstract

The present application relates to a method and apparatus for determining a correction coefficient of a display screen light point, and a computer device. The method comprises: obtaining an original image of a display screen to be corrected; for any light point in the original image, collecting color parameter values of the light point under a plurality of preset gray scales respectively; and obtaining a target color parameter value of the light point, and obtaining a correction coefficient of the light point in said display screen according to the target color parameter value and the color parameter value under each gray scale. According to the method, a more accurate linear corresponding relationship can be formed between the correction coefficient of the light point and the color parameter value of the light point, such that the correction effect of correcting the display screen by using the correction coefficient can be improved.

Description

Method, device and computer equipment for determining correction coefficient of display lamp point

This application claims the priority of the Chinese patent application submitted to the China Patent Office on July 21, 2021, with the application number 2021108271016, and the application name is "Method, device and computer equipment for determining the correction coefficient of the display lamp point", the entire content of which Incorporated in this application by reference.

technical field

The present application relates to the technical field of LED display calibration, in particular to a method, device, computer equipment and storage medium for determining a correction coefficient of a display screen light point.

Background technique

At present, when using industrial cameras to calibrate LED display screens, the brightness or stimulus value of the light point is collected in a single gray scale, so it is determined that the brightness or stimulus value of the light point has a completely linear relationship with the correction coefficient, and then the light point is determined. Correction factor for brightness or stimulus values.

But the inventor realizes that actually due to the differences in the screen hardware itself and the differences in acquisition equipment and acquisition methods, the change of the light point stimulation value or brightness with the correction coefficient will not be completely linear (for example, when the correction coefficient is 1, the light The actual brightness of the dot is 100. If the brightness of the dot is adjusted from 100 to 80, the correction factor used is 0.8. In fact, the brightness of the dot will not become the expected brightness of 80). Therefore, the correction effect of correcting the LED display screen by using the correction coefficient determined by the existing method is often worse than the ideal correction effect.

Contents of the invention

A method for determining a correction coefficient of a display screen light point, comprising:

Obtain the original image of the display screen to be corrected;

For any light point in the original image, collect the color parameter values of the light point in a plurality of preset gray scales;

The target color parameter value of the light point is acquired, and the correction coefficient of the light point in the display screen to be corrected is acquired according to the target color parameter value and the color parameter values in each gray scale.

A device for determining a correction coefficient of a display lamp point, comprising:

An image acquisition module, configured to acquire the original image of the display screen to be corrected;

A data acquisition module, configured to collect color parameter values of each light point in preset multiple gray scales for any light point in the original image;

A coefficient determination module, configured to obtain the target color parameter value of the light point, and obtain the light point value of the light point in the display screen to be corrected according to the target color parameter value and the color parameter values under each gray scale. Correction coefficient.

A computer device, comprising a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

Obtain the original image of the display screen to be corrected;

For any light point in the original image, collect the color parameter values of the light point in a plurality of preset gray scales;

The target color parameter value of the light point is acquired, and the correction coefficient of the light point in the display screen to be corrected is acquired according to the target color parameter value and the color parameter values in each gray scale.

A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Obtain the original image of the display screen to be corrected;

For any light point in the original image, collect the color parameter values of the light point in a plurality of preset gray scales;

The target color parameter value of the light point is acquired, and the correction coefficient of the light point in the display screen to be corrected is acquired according to the target color parameter value and the color parameter values in each gray scale.

The method, device, computer equipment, and storage medium for determining the correction coefficient of the light point of the display screen can form a more accurate linear correspondence between the correction coefficient of the light point and the color parameter value of the light point, thereby improving the accuracy of the display by using the correction coefficient. The correction effect of the correction on the screen.

Description of drawings

Fig. 1 is a schematic flowchart of a method for determining a correction coefficient of a display screen light spot in an embodiment;

Fig. 2 is a schematic flow chart of the steps of determining the brightness correction coefficient of the lamp point in an embodiment;

Fig. 3 is a schematic diagram of the relationship between chromaticity and gray scale numbers in an embodiment;

Fig. 4 is a schematic flowchart of a method for determining a correction coefficient of a display screen light point in another embodiment;

Fig. 5 is a structural block diagram of a device for determining a correction coefficient of a display lamp point in an embodiment;

Figure 6 is an internal block diagram of a computer device in one embodiment.

detailed description

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

It should be noted that the term "first\second" involved in the embodiment of this application is only to distinguish similar objects, and does not represent a specific ordering of objects. It is understandable that "first\second" is allowed The specific order or sequence may be interchanged under certain circumstances. It should be understood that the terms "first\second" are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.

In one embodiment, as shown in FIG. 1 , a method for determining a correction coefficient of a display screen light point is provided. This embodiment uses the method applied to a terminal for illustration. It can be understood that this method can also be applied to The server may also be applied to a system including a terminal and a server, and may be implemented through interaction between the terminal and the server. In this embodiment, the method includes the following steps:

Step S102, acquiring the original image of the display screen to be corrected.

In a specific implementation, the display screen to be corrected may be an LED display screen, and the original image of the display screen to be corrected may be obtained by image acquisition of the display screen to be corrected by an image acquisition device. After obtaining the original image, the collected original image can be transmitted to the terminal, the terminal calculates the correction coefficient based on the original image, and sends the correction coefficient to the receiving card, so that the display screen to be corrected can be corrected by the receiving card, and the receiving The card is set in the display to be calibrated.

Step S104, for any light point in the original image, collect the color parameter values of the light point in a plurality of preset gray scales.

Among them, the gray scale represents the level of different brightness levels between the brightest and the darkest. ^The maximum level of the gray scale can be determined by the number of color bits. The scale is 255; when the number of color bits is 10 bits, it is equivalent to 2 ¹⁰ =1024 gray scales, and the maximum gray scale is 1023.

Wherein, the color parameter value includes a brightness value and a tristimulus value, wherein the tristimulus value represents the amount of stimulation of the three primary colors that cause the human retina to perceive a certain color, that is, the three primary colors of red, green, and blue.

Wherein, the preset plurality of gray scales includes at least three gray scales, such as the first gray scale, the second gray scale, and the third gray scale, wherein the third gray scale can be the gray scale of each level corresponding to the current color bit number The highest grayscale in . It can be understood that the greater the number of preset gray levels, the higher the accuracy of the determined correction coefficient.

Wherein, the multiple gray scales used for determining the brightness correction coefficients and the multiple gray scales used for determining the chromaticity correction coefficients corresponding to the tristimulus values may be different.

In specific implementation, the preset plurality of gray scales may include at least three gray scales, and each gray scale is different from each other. In this embodiment, the three gray scales are respectively the first gray scale, the second gray scale and the third gray scale. As an example, the solution of this embodiment will be described. Specifically, for any light point in the original image, the color parameter values of the light point in the preset multiple gray scales are collected, that is, the color parameter values of the light point in the preset first gray scale and the second gray scale are respectively collected. and brightness values under the third gray scale, and collect the tristimulus values of the light point under the preset first gray scale, second gray scale and third gray scale respectively. Then, the brightness correction coefficient of the lamp point can be calculated according to the brightness values of the lamp point under the preset first gray scale, second gray scale and third gray scale. The chromaticity correction coefficients corresponding to the tristimulus values of the light point are calculated according to the tristimulus values of the light point at the preset first gray scale, second gray scale and third gray scale.

Step S106, obtaining the target color parameter value of the light point, and obtaining the correction coefficient of the light point in the display screen to be corrected according to the target color parameter value and the color parameter values in each gray scale.

Wherein, the target color parameter value may represent the color parameter value to which the light point needs to be adjusted, and the target color parameter value includes a target brightness value and a target tristimulus value.

Wherein, the correction coefficients of the light points include brightness correction coefficients and chromaticity correction coefficients corresponding to the tristimulus values respectively. RGB corresponds to one brightness correction coefficient, and RGB corresponds to three chroma correction coefficients respectively.

It is understandable that due to the differences in the screen hardware itself, as well as the differences in acquisition equipment and acquisition methods, the variation curves of the tristimulus value or brightness with the correction coefficient may be different between different light points, and the three stimuli The degree of non-linearity between the values may also be different. Therefore, when obtaining the correction coefficients of the light points in the present application, the correction coefficients of each light point are obtained separately. For each light point, the idea of obtaining brightness correction coefficients and chromaticity correction coefficients corresponding to the three stimulus values respectively, so as to improve the correction effect on the display screen.

In the specific implementation, after determining the first gray scale, the second gray scale and the third gray scale, the gamma values of each gray scale are obtained respectively, and the first correction coefficient and the second correction coefficient are obtained according to the gamma values of each gray scale coefficient. According to the target parameter value, the first correction coefficient, the second correction coefficient and the color parameter values in each gray scale, the correction coefficient of the light point is obtained.

More specifically, when the color parameter value is a brightness value, the first brightness correction coefficient and the second brightness correction coefficient are obtained according to the gamma value of each gray scale. After obtaining the target brightness value of the light point, the brightness correction coefficient of the light point is obtained according to the target brightness value of the light point, the first brightness correction coefficient, the second brightness correction coefficient and the brightness values of the light point in each gray scale. When the color parameter value is a tristimulus value, the first chromaticity correction coefficient and the second chromaticity correction coefficient are obtained according to the gamma value of each gray scale. After obtaining the target tristimulus value of the light point, according to the target tristimulus value of the light point, the first chromaticity correction coefficient, the second chromaticity correction coefficient and the tristimulus value of the light point at each gray scale, the light point’s tristimulus value is obtained. Chromaticity correction coefficients for each of the tristimulus values.

In the method for determining the correction coefficient of the light point of the display screen described above, after obtaining the original image of the display screen to be corrected, for any light point in the original image, the color parameters of the light point in the preset multiple gray scales are collected value, so that after obtaining the target color parameter value of the light point, the correction coefficient of the light point in the display screen to be corrected can be obtained according to the target color parameter value and the color parameter value under each gray scale. This method determines the correction coefficient of the light point through the color parameter values of the light point in multiple gray scales. Two corrections are involved, namely brightness correction and chromaticity correction, so that the correction coefficient of the light point is the same as that of the light point The color parameter values can form a more accurate linear correspondence, thereby improving the correction effect of using the correction coefficient to calibrate the display screen.

In one embodiment, as shown in FIG. 2, when the color parameter value is a brightness value, the above step S106 includes:

Step S202, acquiring gamma values of multiple gray scales; the multiple gray scales may include a first gray scale, a second gray scale, and a third gray scale;

Step S204, according to the gamma value of each gray scale, obtain the first brightness correction coefficient and the second brightness correction coefficient;

Step S206, according to the target luminance value, the first luminance correction coefficient, the second luminance correction coefficient, and the luminance values in each gray scale, obtain the luminance correction coefficient of the lamp point.

Among them, the gamma value can represent the relationship between the input value and the output brightness of the display in image processing.

Wherein, the third gray scale may be the highest gray scale among gray scales of all levels corresponding to the current color bit number. For example, when the color bit is 8bit, there are 256 gray levels (0~255) in total, and the highest gray level is 255; when the color bit is 10bit, there are 1024 gray levels (0~1023), then The highest gray scale is 1023.

Wherein, the first brightness correction coefficient may represent a correction coefficient corresponding to the brightness of the lamp point under the first gray scale.

Wherein, the second brightness correction coefficient may represent a correction coefficient corresponding to the brightness of the lamp point under the second gray scale.

Wherein, the target brightness value can be understood as the brightness value to which the light point needs to be adjusted.

In a specific implementation, the first brightness correction coefficient can be obtained by calculating the ratio of the gamma value of the first gray scale to the highest gray scale, and the second brightness correction coefficient can be obtained by calculating the ratio of the gamma value of the second gray scale to the highest gray scale It can be obtained that when there are more than three gray levels, the nth brightness correction coefficient can be obtained by calculating the ratio of the nth gray level to the gamma value of the highest gray level.

It can be understood that when the change of the brightness correction coefficient is relatively small, it can be approximately considered that the change of the brightness of the lamp point with the brightness correction coefficient is linear. Therefore, if the brightness value corresponding to the first brightness correction coefficient is the first brightness value, the second brightness The luminance value corresponding to the correction coefficient is the second luminance value, then the following relationship is established:

Based on this relational expression, after obtaining the target luminance value, the first luminance correction coefficient, the second luminance correction coefficient, the first luminance value and the second luminance value, and substituting each value into the above relational expression, the brightness of the lamp point can be obtained Correction coefficient.

In one embodiment, the above step S204 specifically includes: obtaining the ratio of the gamma value of the first gray scale to the gamma value of the third gray scale as the first brightness correction coefficient; obtaining the gamma value of the second gray scale and The ratio of the gamma value of the third gray scale is used as the second brightness correction coefficient.

In the specific implementation, taking the preset multiple gray scales as the first gray scale, the second gray scale and the highest gray scale as an example, if the gamma values of each gray scale are γ ₁ , γ ₂ , and γ respectively, then the first gray scale The brightness correction coefficient (denoted as d ₁ ) can be expressed as: d ₁ =γ ₁ /γ, and the second brightness correction coefficient (denoted as d ₂ ) can be expressed as: d ₂ =γ ₂ /γ.

For example, when the highest gray level is 255, the corresponding gamma value γ=2915, when the first gray level is 225 and the second gray level is 246, the corresponding gamma values are γ ₁ =2060 and γ ₂ =2648 respectively, then the first The brightness correction coefficient d ₁ =γ ₁ /γ=2060/2915=0.707, and the second brightness correction coefficient d ₂ =γ ₂ /γ=2648/2915=0.905.

Further, if the first brightness value under the first gray scale is L ₁ , the second brightness value L ₂ under the second gray scale, and the target brightness value is L, then based on the relationship between the above brightness value and the correction coefficient , the relational expression of the luminance correction coefficient P _luminance of the lamp point can be expressed as:

In the above embodiment, when the color parameter value is the brightness value and the brightness correction coefficient changes little, it is considered that the brightness changes linearly with the correction coefficient, thus, after obtaining the target brightness value, the first brightness correction coefficient, and the second brightness correction coefficient The brightness correction coefficient of the lamp point is determined based on the linear relationship between the brightness value and the brightness correction coefficient. This method of determining the brightness correction coefficient of the lamp point through the brightness values of the lamp point under multiple gray scales can form a more accurate linear correspondence between the brightness correction coefficient of the lamp point and the brightness of the lamp point, so that Improve the correction effect of using the brightness correction coefficient to correct the brightness of the display screen.

In one embodiment, when the color parameter value is a tristimulus value, the above step S106 further includes: obtaining the first chromaticity correction coefficient and the second chromaticity correction coefficient according to the preset gamma values of multiple gray scales; The multiple gray scales include the first gray scale, the second gray scale and the third gray scale; according to the target tristimulus value, the first chromaticity correction coefficient, the second chromaticity correction coefficient, and the tristimulus value under each gray scale, The chromaticity correction coefficients corresponding to the tristimulus values of the light points are obtained.

Wherein, the first chromaticity correction coefficient may represent the correction coefficient corresponding to the tristimulus value of the light point under the first gray scale.

Wherein, the second chromaticity correction coefficient may represent the correction coefficient corresponding to the tristimulus value of the light point under the second gray scale.

Wherein, the target tristimulus value can be understood as the tristimulus value to which the light point needs to be adjusted.

In a specific implementation, the first chromaticity correction coefficient can be obtained by calculating the ratio of the gamma value of the first gray scale to the highest gray scale, and the second chromaticity correction coefficient can be obtained by calculating the gamma value of the second gray scale to the highest gray scale When there are more than three gray levels, the nth chromaticity correction coefficient can be obtained by calculating the ratio of the nth gray level to the gamma value of the highest gray level.

It can be understood that, similar to the brightness correction of the lamp point, the relationship between the brightness of the lamp point and the brightness correction coefficient is not completely linear, and the relationship between the three stimulus values and the correction coefficient is not completely linear, and the three stimulus values are nonlinear The degree will also be different. If the tristimulus value of a single light point is regarded as a three-dimensional vector, the direction and magnitude of the three-dimensional vector will change with the correction coefficient. When the correction coefficient changes very little, it can be approximated that the tristimulus values each change linearly with the correction coefficient. Therefore, the calculation of the correction coefficients for the multi-gray scale chromaticity correction can be performed according to the relationship between the chromaticity correction coefficients corresponding to the three stimulus values and the three stimuli values respectively.

In one embodiment, when the color parameter value is a tristimulus value, the above step S106 further includes: acquiring the gamma values of multiple gray scales; the multiple gray scales include low gray scale, first gray scale, and second gray scale and the third gray scale; according to the gamma value γ ₀ of the low gray scale, the gamma value γ ₁ of the first gray scale, the gamma value γ ₂ of the second gray scale, and the gamma value γ of the third gray scale, we get Low grayscale chromaticity correction coefficient p ₀ =γ ₀ /γ, first chromaticity correction coefficient p ₁ =γ ₁ /γ, and second chromaticity correction coefficient p ₂ =γ ₂ /γ; according to the target tristimulus value: Rd, Gd, Bd; low grayscale chromaticity correction coefficient p ₀ ; first chromaticity correction coefficient p ₁ ; second chromaticity correction coefficient p ₂ ; tristimulus values at low grayscale: R ₀ , G ₀ , B ₀ ; tri-stimulus values under the first gray scale: R ₁ , G ₁ , B ₁ ; and tri-stimulus values under the second gray scale: R ₂ , G ₂ , B ₂ Chromaticity correction coefficient; where, 0<p ₀ <1, 0<p ₁ <1, 0<p ₂ <1.

Wherein, the low grayscale chromaticity correction coefficient may represent the correction coefficient corresponding to the tristimulus value of the light point at the low grayscale.

In the specific implementation, the acquisition process of the chromaticity correction coefficients corresponding to the three stimulus values of the light point is as follows: Let the four gray scales be the low gray scale, the first gray scale, the second gray scale and the highest gray scale, among which, the first gray scale The first gray scale can be gray scale 225, the second gray scale can be gray scale 246, and the tristimulus values of the light points in each gray scale can be expressed as:

The tristimulus values of the light point at low grayscale, that is, the stimuli values of the three primary colors of red, green and blue are:

The tristimulus values of the light point under the first gray scale are:

The tristimulus values of the light point under the second gray scale are:

The target tristimulus values of the lamp points are:

Among them, X _R0 represents the red primary color stimulation amount of the red light point under the low gray scale, Y _R0 represents the green primary color stimulation amount of the red light point under the low gray scale, and Z _R0 represents the blue primary color of the red light point under the low gray scale Stimulus amount; X _G0 represents the red primary color stimulation amount of the green light point under the low gray scale, Y _G0 represents the green primary color stimulation amount of the green light point under the low gray scale, and Z _G0 represents the blue color of the green light point under the low gray scale Primary color stimulation amount; X _B0 represents the red primary color stimulation amount of the blue light point under the low gray scale, Y _B0 represents the green primary color stimulation amount of the blue light point under the low gray scale and Z _B0 represents the blue light point under the low gray scale The blue primary color stimulation amount of the light point; X _R1 represents the red primary color stimulation amount of the red light point under the first gray scale, Y _R1 represents the green primary color stimulation amount of the red light point under the first gray scale and Z _R1 represents the first gray level X _G1 represents the red primary color stimulation amount of the green light point under the first gray scale, Y _G1 represents the green primary color stimulation amount of the green light point under the first gray scale and Z _G1 Indicates the blue primary color stimulation amount of the green light point under the first gray scale; X _B1 represents the red primary color stimulation amount of the blue light point under the first gray scale, Y _B1 represents the green color of the blue light point under the first gray scale The primary color stimulus and Z _B1 represent the blue primary color stimulus of the blue light point under the first gray scale; X _R2 represents the red primary color stimulus of the red light point under the second gray scale, and Y _R2 represents the The green primary color stimulation amount of the red light point and Z _R2 represent the blue primary color stimulation amount of the red light point under the second gray scale; X _G2 represents the red primary color stimulation amount of the green light point under the second gray scale, Y _G2 represents the second gray level The green primary color stimulation amount of the green light point under the gray scale and Z _G2 represent the blue primary color stimulation amount of the green light point under the second gray scale; X _B2 represents the red primary color stimulation amount of the blue light point under the second gray scale, Y _B2 represents the green primary color stimulation amount of the blue light point under the second gray scale and Z _B2 represents the blue primary color stimulation amount of the blue light point under the second gray scale; X _Rd represents the red primary color stimulation amount of the target red light point , Y _Rd represents the green primary color stimulus of the target red light point and Z _Rd represents the blue primary color stimulus of the target red light point; X _Gd represents the red primary color stimulus of the target green light point, Y _Gd represents the green primary color of the target green light point Stimulus amount and Z _Gd represents the blue primary color stimulus amount of the target green light point; X _Bd represents the red primary color stimulus amount of the target blue light point, Y _Bd represents the green primary color stimulus amount of the target blue light point, and Z _Bd represents the target blue color The blue primary stimulus amount of the light spot.

In order to achieve the target color gamut, the following formula needs to be established:

Among them, R ₁ +(R ₂ -R ₁ )×a ₁ is the principal component of the tristimulus value of the target color gamut, G ₀ b ₁ and B ₀ c ₁ are the subcomponents of the tristimulus value of the target color gamut, the above formula is established The reason is that when the low grayscale is converted to the target grayscale, the conversion between the low grayscale and the target grayscale is not a linear relationship, so the expression relationship of the target color gamut of the target grayscale is a linear relationship between multiple grayscales The corresponding expressions are combined, as shown in Figure 3. In the figure, R ₁ , R ₂ and R _d are the tristimulus values in the first gray scale, the tristimulus values in the second gray scale, and the target The value of the red component in the tristimulus value, wherein the value of the second gray scale may be greater than the value of the first gray scale, the value of the target gray scale may be within the range between the first gray scale and the second gray scale, and the first gray scale The values of the second gray scale and the second gray scale can be changed, as long as it meets the requirement that the tristimulus value changes linearly with the correction coefficient when the correction coefficient changes little.

Transform the above formula to get

Further, multiply both sides of the above formula by [R ₂ -R ₁ G ₀ B ₀ ] ^-1 to get:

Since the product of [R ₂ -R ₁ G ₀ B ₀ ] ^-1 [R ₂ -R ₁ G ₀ B ₀ ] is a unit vector, we can get:

then there is a coefficient

Similarly, in order to achieve the target color gamut, the following two relations need to be established:

where the equation

Among them, G ₁ +(G ₂ -G ₁ )×b ₂ is the main component, R ₀ a ₂ and B ₀ c ₂ are the secondary components; the equation

Among them, B ₁ +(B ₂ -B ₁ )×c ₃ is the main component, and R ₀ a ₃ and G ₀ b ₃ are the secondary components.

with the above

The relational expression of is obtained in the same way, based on the formula

and

Available

and

The relational expressions are:

In practical applications, in order to save the time of image acquisition, it is possible not to collect low-gray-scale tristimulus values R ₀ , G ₀ , and B ₀ , but to use the first gray-scale tri-stimulus values R ₁ , G ₁ , and B ₁ instead , the low grayscale chromaticity correction coefficient p ₀ is also replaced by the first chromaticity correction coefficient p ₁ , the actual correction effect is not significantly different, therefore, it can be obtained:

Further, the relational expressions of the chromaticity correction coefficients corresponding to the tristimulus values of the lamp points are respectively:

in,

and

Respectively represent the correction coefficients of the three primary colors of red, green and blue in the tristimulus value of the lamp point.

In the process of obtaining the chromaticity correction coefficients corresponding to the three-stimulus values of the above-mentioned light points, based on the condition of satisfying the target color gamut, each stimulus value in the target three-stimulus value is obtained, and the red stimulus value and the green stimulus value of each gray scale are respectively compared with each other. The relationship between the three stimulus values and the blue stimulus value, that is, three relationship expressions that can reach the target tri-stimulus value, and then based on these three relationship expressions, the chromaticity correction coefficients corresponding to the three stimulus values are converted.

It should be noted that in this application, the process of obtaining the brightness correction coefficients of the light points in the display screen to be corrected and the chromaticity correction coefficients corresponding to the tristimulus values are obtained based on the bright conditions, that is, the obtained light points The respective chromaticity correction coefficients and brightness correction coefficients corresponding to the tristimulus values under the high-brightness multi-grayscale.

In this embodiment, when the color parameter value is a tristimulus value and the brightness correction coefficient changes little, it is considered that the tristimulus value changes linearly with the respective correction coefficients, thus, after obtaining the target tristimulus value, the first chromaticity After the correction coefficient, the second chromaticity correction coefficient, and the tristimulus values under each gray scale, based on the linear relationship between the tristimulus values and the respective correction coefficients, determine the respective chromaticity correction coefficients corresponding to the tristimulus values of the light point , this method of determining the chromaticity correction coefficients corresponding to the tristimulus values of the lamp points respectively through the tristimulus values of the lamp points at multiple gray scales, so that the corresponding chromaticity correction coefficients of the obtained tristimulus values of the lamp points are respectively The coefficients and the tristimulus values of the light points can form a more accurate linear correspondence, thereby improving the correction effect of using the chromaticity correction coefficients corresponding to the tristimulus values to correct the display screen.

In one embodiment, after the above step S106, further includes: acquiring the original color parameter value of the light point; correcting the original color parameter value based on the correction coefficient to obtain the corrected color parameter value of the light point.

Wherein, the original color parameter values include original brightness values and original tristimulus values.

Wherein, the correction coefficients include brightness correction coefficients and chromaticity correction coefficients respectively corresponding to the tristimulus values.

In the specific implementation, after obtaining the original brightness value and the original tri-stimulus value of the lamp point, the brightness correction coefficient can be used to correct the brightness of the lamp point, and the corrected brightness value of the lamp point can be obtained, and the respective corresponding three-stimulus values can be used to correct the brightness of the lamp point. The chromaticity correction coefficients correct the tristimulus values of the lamp points respectively to obtain the corrected tristimulus values. More specifically, when correcting the tristimulus values of the light point, the correction coefficient of the red component can be used to correct the red stimulus value among the tristimulus values, and the green component can be used to correct the green stimulus value among the tristimulus values. Correction, using the correction coefficient of the blue component to correct the blue stimulus value in the tristimulus value.

In practical applications, the brightness and chromaticity of the light points in the LED display can also be corrected based on the chromaticity equation C=X[X]+Y[Y]+Z[Z], where X, Y, Z is the tristimulus value of the light point (that is, X represents the red primary color stimulus amount of one of the RGB light points, Y represents the green primary color stimulus value of one of the RGB light points, and Z represents one of the RGB light points. The blue primary color stimulus amount of the lamp point), then the tristimulus value of the two mixed colors is the sum of the tristimulus values of each component color. In addition, for the convenience of calculation, the brightness is generally only determined by the [Y] primary color of the three primary colors, that is, the [Y] primary color of the three primary colors represents both chromaticity and brightness, while [X] and [Z] primary colors only represent color. Taste.

In this embodiment, the brightness value of the lamp point is used to correct the brightness of the lamp point, and the chromaticity correction coefficients corresponding to the three stimulus values of the lamp point are respectively used to correct the tristimulus value of the lamp point respectively. By making the brightness of the lamp point and The tristimulus value and the correction coefficient respectively form a more correct linear correspondence relationship, which can improve the uniformity of the brightness and chromaticity of the display screen when performing brightness correction and chromaticity correction through the respective correction coefficients, thereby ensuring a good correction effect.

In another embodiment, as shown in FIG. 4, a method for determining a correction coefficient of a display lamp point is provided. In this embodiment, the method includes the following steps:

Step S402, acquiring the original image of the display screen to be corrected;

Step S404, for any light point in the original image, collect the color parameter values of the light point at multiple preset gray scales; the color parameter values include brightness value and tristimulus value;

Step S406, acquiring the preset gamma values of multiple gray scales; the multiple gray scales include the first gray scale, the second gray scale and the highest gray scale;

Step S408, obtaining the ratio of the gamma value of the first gray scale to the gamma value of the highest gray scale as a first correction coefficient; the first correction coefficient is a first brightness correction coefficient or a first chroma correction coefficient;

Step S410, obtaining the ratio of the gamma value of the second gray scale to the gamma value of the highest gray scale as a second correction coefficient; the second correction coefficient is a second brightness correction coefficient or a second chroma correction coefficient;

Step S412, obtaining the target color parameter value of the light point, and obtaining the correction coefficient of the light point according to the target parameter value, the first correction coefficient, the second correction coefficient and the color parameter values at each gray scale;

Step S412a, when the color parameter value is a brightness value, obtain the brightness correction coefficient of the light point according to the target brightness value, the first brightness correction coefficient, the second brightness correction coefficient, and the brightness values at each gray scale;

Step S412b, when the color parameter value is a tristimulus value, according to the target tristimulus value, the first chromaticity correction coefficient, the second chromaticity correction coefficient, and the tristimulus values under multiple gray scales, obtain the tristimulus value of the light point Values correspond to the chromaticity correction coefficients.

The method for determining the correction coefficient of the display lamp point provided in this embodiment can make the brightness of the light point and the tristimulus value respectively form a more accurate linear correspondence with the correction coefficient in the process of highlight multi-grayscale brightness correction and chromaticity correction , so that the brightness and chromaticity will be more uniform when the luminance correction coefficient and the chromaticity correction coefficient corresponding to the tristimulus value are respectively used to perform the luminance correction and chromaticity correction, thereby ensuring a good correction effect.

It should be understood that although the various steps in the flowcharts of FIG. 1 , FIG. 2 and FIG. 4 are displayed sequentially as indicated by the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least some of the steps in FIG. 1, FIG. 2 and FIG. 4 may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but may be performed at different times. These steps Or the execution sequence of the stages is not necessarily performed sequentially, but may be executed in turn or alternately with other steps or at least a part of steps or stages in other steps.

In one embodiment, as shown in FIG. 5 , a device for determining a correction coefficient of a display lamp point is provided, including: an image acquisition module 502, a data acquisition module 504, and a coefficient determination module 506, wherein:

The image acquisition module 502 is used to acquire the original image of the display screen to be corrected;

The data acquisition module 504 is used for collecting the color parameter values of each light point in preset multiple gray scales for any light point in the original image;

The coefficient determination module 506 is used to obtain the target color parameter value of the light point, and obtain the correction coefficient of the light point in the display screen to be corrected according to the target color parameter value and the color parameter value in each gray scale.

In one embodiment, if the value of the color parameter is a brightness value, the coefficient determination module 506 is specifically configured to acquire the gamma values of multiple gray scales; the multiple gray scales include the first gray scale, the second gray scale and the third gray scale According to the gamma value of each gray scale, the first brightness correction coefficient and the second brightness correction coefficient are obtained; according to the target brightness value, the first brightness correction coefficient, the second brightness correction coefficient, and the brightness value under each gray scale, Get the brightness correction coefficient of the light point.

In one embodiment, the coefficient determination module 506 is further configured to obtain the ratio of the gamma value of the first gray scale to the gamma value of the third gray scale as the first brightness correction coefficient; obtain the gamma of the second gray scale The ratio of the value to the gamma value of the third gray scale is used as the second brightness correction coefficient.

In one embodiment, the brightness correction coefficient of the lamp point is obtained by the following relational formula:

Among them, P _luminance represents the brightness correction coefficient of the lamp point, d ₁ represents the first brightness correction coefficient, d ₂ represents the second brightness correction coefficient, L represents the target brightness value, L ₁ represents the first brightness value of the lamp point under the first gray scale The brightness value, L ₂ represents the second brightness value of the lamp point under the second gray scale; wherein, 0<d ₁ <1, 0<d ₂ <1.

In one embodiment, if the color parameter value is a tristimulus value, the coefficient determination module 506 is also used to acquire the gamma values of multiple gray scales; multiple gray scales include low gray scale, first gray scale, second gray scale Grayscale and third grayscale; according to the gamma value of the low grayscale γ ₀ , the gamma value of the first grayscale γ ₁ , the gamma value of the second grayscale γ ₂ , the gamma value of the third grayscale γ , to obtain the low grayscale chromaticity correction coefficient p ₀ =γ ₀ /γ, the first chromaticity correction coefficient p ₁ =γ ₁ /γ, and the second chromaticity correction coefficient p ₂ =γ ₂ /γ; according to the target tristimulus Values: Rd, Gd, Bd; low grayscale chromaticity correction coefficient p ₀ ; first chromaticity correction coefficient p ₁ ; second chromaticity correction coefficient p ₂ ; tristimulus values at low grayscale: R ₀ , G ₀ , B ₀ ; the tristimulus values under the first gray scale: R ₁ , G ₁ , B ₁ ; and the tristimulus values under the second gray scale: R ₂ , G ₂ , B ₂ , to get the tristimulus values of the light point The respective chroma correction coefficients;

Among them, the tri-stimulus value at low gray scale is:

The tristimulus values under the first gray scale are:

The tristimulus values under the second gray scale are:

The target tristimulus values are:

Among them, 0<p ₀ <1, 0<p ₁ <1, 0<p ₂ <1;

X _R0 represents the red primary color stimulation amount of red light points under low gray scale, Y _R0 represents the green primary color stimulation amount of red light points under low gray scale, and Z _R0 represents the blue primary color stimulation amount of red light points under low gray scale ; X _G0 represents the red primary color stimulation amount of the green light point under the low gray scale, Y _G0 represents the green primary color stimulation amount of the green light point under the low gray scale and Z _G0 represents the blue primary color stimulation of the green light point under the low gray scale Amount; X _B0 represents the red primary color stimulation amount of the blue light point under the low gray scale, Y _B0 represents the green primary color stimulation amount of the blue light point under the low gray scale and Z _B0 represents the blue light point under the low gray scale X _R1 represents the red primary color stimulation amount of the red light point under the first gray scale, Y _R1 represents the green primary color stimulation amount of the red light point under the first gray scale and Z _R1 represents the green primary color stimulation amount of the red light point under the first gray scale X _G1 represents the red primary color stimulation amount of the green light point under the first gray scale, Y _G1 represents the green primary color stimulation amount of the green light point under the first gray scale, and Z _G1 represents the green primary color stimulation amount of the green light point under the first gray scale. The blue primary color stimulation amount of the green light point under the first gray scale; X _B1 represents the red primary color stimulation amount of the blue light point under the first gray scale, and Y _B1 represents the green primary color stimulation amount of the blue light point under the first gray scale Amount and Z _B1 represent the blue primary color stimulation amount of the blue light point under the first gray scale; X _R2 represent the red primary color stimulation amount of the red light point under the second gray scale; Y _R2 represent the red light point under the second gray scale The green primary color stimulation amount of the point and Z _R2 represent the blue primary color stimulation amount of the red light point under the second gray scale; X _G2 represents the red primary color stimulation amount of the green light point under the second gray scale, and Y _G2 represents the second gray scale The green primary color stimulation amount of the green light point below and Z _G2 represents the blue primary color stimulation amount of the green light point under the second gray scale; X _B2 represents the red primary color stimulation amount of the blue light point under the second gray scale, Y _B2 Represents the green primary color stimulus amount of the blue light point under the second gray scale and Z _B2 represents the blue primary color stimulus amount of the blue light point under the second gray scale; X _Rd represents the red primary color stimulus amount of the target red light point, Y _Rd represents the green primary color stimulation amount of the target red light point and Z _Rd represents the blue primary color stimulation amount of the target red light point; X _Gd represents the red primary color stimulation amount of the target green light point, Y _Gd represents the green primary color stimulation amount of the target green light point and Z _Gd represent the blue primary color stimulus amount of the target green light point; X _Bd represent the red primary color stimulus amount of the target blue light point, Y _Bd represent the green primary color stimulus amount of the target blue light point and Z _Bd represent the target blue light point The amount of the blue primary color stimulus.

In one embodiment, the above-mentioned coefficient determination module 506 is also used to obtain the relational expression for reaching the target color gamut:

and

According to the three relational expressions to achieve the target color gamut, the coefficients are obtained

and

The relational expressions are:

and

Replace the tristimulus values R ₀ , G ₀ , and B ₀ of the low gray level with the tristimulus values R ₁ , G ₁ , and B ₁ of the first gray level to obtain the substituted coefficients

and

The relational expressions are:

According to the coefficient after substitution

and

According to the relational expression, the chromaticity correction coefficients corresponding to the tristimulus values of the lamp points are respectively:

In one embodiment, the above-mentioned device further includes a correction module for acquiring the original color parameter value of the light spot; correcting the original color parameter value based on the correction coefficient to obtain the corrected color parameter value of the light spot.

It should be noted that the device for determining the correction coefficient of the display screen light point of the present application corresponds to the method for determining the correction coefficient of the display screen light point of the present application. The technical features and beneficial effects are all applicable to the embodiment of the device for determining the correction coefficient of the light point of the display screen. For specific content, please refer to the description in the method embodiment of the present application, which will not be repeated here, and is hereby declared. In addition, each module in the device for determining the correction coefficient of the light point of the display screen can be fully or partially realized by software, hardware or a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, and can also be stored in the memory of the computer device in the form of software, so that the processor can invoke and execute the corresponding operations of the above-mentioned modules.

In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure may be as shown in FIG. 6 . The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Wherein, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, an operator network, NFC (Near Field Communication) or other technologies. When the computer program is executed by the processor, a method for determining the correction coefficient of the light point of the display screen is realized. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covered on the display screen, or a button, a trackball or a touch pad provided on the casing of the computer device , and can also be an external keyboard, touchpad, or mouse.

Those skilled in the art can understand that the structure shown in FIG. 6 is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation on the computer equipment to which the solution of this application is applied. The specific computer equipment can be More or fewer components than shown in the figures may be included, or some components may be combined, or have a different arrangement of components.

In one embodiment, a computer device is provided, including a memory and a processor, a computer program is stored in the memory, and the processor implements the following steps when executing the computer program:

Obtain the original image of the display screen to be corrected;

For any light point in the original image, collect the color parameter values of the light point in preset multiple gray scales;

The target color parameter value of the light point is obtained, and the correction coefficient of the light point in the display screen to be corrected is obtained according to the target color parameter value and the color parameter value under each gray scale.

In one embodiment, there is also provided a computer device, including a memory and a processor, where a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

Obtain the original image of the display screen to be corrected;

For any light point in the original image, collect the color parameter values of the light point in preset multiple gray scales;

The target color parameter value of the light point is obtained, and the correction coefficient of the light point in the display screen to be corrected is obtained according to the target color parameter value and the color parameter value under each gray scale.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps in the foregoing method embodiments are implemented.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the computer programs can be stored in a non-volatile computer-readable memory medium or a volatile computer-readable storage medium, when the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, any references to memory, storage, database or other media used in the various embodiments provided in the present application may include at least one of non-volatile memory and volatile memory. Non-volatile memory may include read-only memory (Read-Only Memory, ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only represent several implementation modes of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the scope of the patent for the invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (12)

1. A method for determining a correction coefficient of a display screen light point, comprising:

   Obtain the original image of the display screen to be corrected;

   For any light point in the original image, collect the color parameter values of the light point in a plurality of preset gray scales;

   The target color parameter value of the light point is acquired, and the correction coefficient of the light point in the display screen to be corrected is acquired according to the target color parameter value and the color parameter values in each gray scale.
2. The method according to claim 1, wherein said obtaining the correction coefficient of the light point in the display screen to be corrected according to the target color parameter value and the color parameter value under each of the gray scales includes: : When the value of the color parameter is the brightness value,

   Acquiring gamma values of the multiple gray scales; the multiple gray scales include a first gray scale, a second gray scale, and a third gray scale;

   Obtaining a first brightness correction coefficient and a second brightness correction coefficient according to the gamma value of each gray scale;

   The brightness correction coefficient of the light point is obtained according to the target brightness value, the first brightness correction coefficient, the second brightness correction coefficient, and the brightness values at each of the gray scales.
3. The method according to claim 2, wherein said obtaining the first brightness correction coefficient and the second brightness correction coefficient according to the gamma value of each said gray scale comprises:

   Obtaining the ratio of the gamma value of the first gray scale to the gamma value of the third gray scale as a first brightness correction coefficient;

   Acquiring a ratio of the gamma value of the second gray scale to the gamma value of the third gray scale as a second brightness correction coefficient.
4. The method according to any one of claims 2-3, wherein the brightness correction coefficient of the lamp point is obtained by the following relational formula:

   

   Wherein, P _luminance represents the luminance correction coefficient of the lamp point, d ₁ represents the first luminance correction coefficient, d ₂ represents the second luminance correction coefficient, L represents the target luminance value, and L ₁ represents the value of the light point under the first gray scale The first brightness value, L ₂ represents the second brightness value of the light point under the second gray scale; wherein, 0<d ₁ <1, 0<d ₂ <1.
5. The method according to claim 1, wherein said obtaining the correction coefficient of the light point in the display screen to be corrected according to the target color parameter value and the color parameter value under each of the gray scales includes: : When the color parameter value is a tristimulus value,

   Acquiring gamma values of the multiple gray scales; the multiple gray scales include a low gray scale, a first gray scale, a second gray scale, and a third gray scale;

   According to the gamma value γ ₀ of the low gray scale, the gamma value γ 1 of the first gray scale, the gamma value γ ₂ of the _second gray scale, and the gamma value γ of the third gray scale , to obtain the low grayscale chromaticity correction coefficient p ₀ =γ ₀ /γ, the first chromaticity correction coefficient p ₁ =γ ₁ /γ, and the second chromaticity correction coefficient p ₂ =γ ₂ /γ;

   According to the target tristimulus value: Rd, Gd, Bd; the low grayscale chromaticity correction coefficient p ₀ ; the first chromaticity correction coefficient p ₁ ; the second chromaticity correction coefficient p ₂ ; The tristimulus values in the first gray scale: R ₀ , G ₀ , B ₀ ; the tristimulus values in the first gray scale: R ₁ , G ₁ , B ₁ ; and the tristimulus values in the second gray scale: R ₂ , G ₂ , B ₂ , to obtain the chromaticity correction coefficients corresponding to the tristimulus values of the light points;

   Among them, the tri-stimulus value at low gray scale is:

   

   The tristimulus values under the first gray scale are:

   

   The tristimulus values under the second gray scale are:

   

   The target tristimulus values are:

   

   Among them, 0<p ₀ <1, 0<p ₁ <1, 0<p ₂ <1;

   X _R0 represents the red primary color stimulation amount of red light points under low gray scale, Y _R0 represents the green primary color stimulation amount of red light points under low gray scale, and Z _R0 represents the blue primary color stimulation amount of red light points under low gray scale ;

   X _G0 represents the red primary color stimulation amount of the green light point under the low gray scale, Y _G0 represents the green primary color stimulation amount of the green light point under the low gray scale, and Z _G0 represents the blue primary color stimulation amount of the green light point under the low gray scale ;

   X _B0 represents the red primary color stimulation amount of the blue light point under the low gray scale, Y _B0 represents the green primary color stimulation amount of the blue light point under the low gray scale, and Z _B0 represents the blue color of the blue light point under the low gray scale. primary color stimulus;

   X _R1 represents the red primary color stimulation amount of the red light point under the first gray scale, Y _R1 represents the green primary color stimulation amount of the red light point under the first gray scale, and Z _R1 represents the blue color of the red light point under the first gray scale primary color stimulus;

   X _G1 represents the red primary color stimulation amount of the green light point under the first gray scale, Y _G1 represents the green primary color stimulation amount of the green light point under the first gray scale, and Z _G1 represents the blue color of the green light point under the first gray scale primary color stimulus;

   X _B1 represents the red primary color stimulation amount of the blue light point under the first gray scale, Y _B1 represents the green primary color stimulation amount of the blue light point under the first gray scale and Z _B1 represents the blue light point under the first gray scale The blue primary color stimulus amount of the dot;

   X _R2 represents the red primary color stimulation amount of the red light point under the second gray scale, Y _R2 represents the green primary color stimulation amount of the red light point under the second gray scale, and Z _R2 represents the blue color of the red light point under the second gray scale primary color stimulus;

   X _G2 represents the red primary color stimulation amount of the green light point under the second gray scale, Y _G2 represents the green primary color stimulation amount of the green light point under the second gray scale, and Z _G2 represents the blue color of the green light point under the second gray scale primary color stimulus;

   X _B2 represents the red primary color stimulation amount of the blue light point under the second gray scale, Y _B2 represents the green primary color stimulation amount of the blue light point under the second gray scale and Z _B2 represents the blue light point under the second gray scale The blue primary color stimulus amount of the dot;

   X _Rd represents the red primary color stimulation amount of the target red light point, Y _Rd represents the green primary color stimulation amount of the target red light point, and Z _Rd represents the blue primary color stimulation amount of the target red light point;

   X _Gd represents the red primary color stimulation amount of the target green light point, Y _Gd represents the green primary color stimulation amount of the target green light point and Z _Gd represents the blue primary color stimulation amount of the target green light point;

   X _Bd represents the red primary color stimulation amount of the target blue light point, Y _Bd represents the green primary color stimulation amount of the target blue light point, and Z _Bd represents the blue primary color stimulation amount of the target blue light point.
6. The method according to claim 5, wherein, according to the target tri-stimulus values: Rd, Gd, Bd; the low grayscale chromaticity correction coefficient p ₀ ; the first chromaticity correction coefficient p ₁ ; the The second chroma correction coefficient p ₂ ; the tristimulus values at the low gray scale: R ₀ , G ₀ , B ₀ ; the tristimulus values at the first gray scale: R ₁ , G ₁ , B ₁ ; And the tri-stimulus values under the second gray scale: R ₂ , G ₂ , B ₂ , to obtain the chromaticity correction coefficients corresponding to the tri-stimulus values of the light points, including:

   Obtain the relational expression to achieve the target color gamut:

   

   

   and

   

   According to the three relational expressions for reaching the target color gamut, the coefficients are obtained

   

   and

   

   The relational expressions are:

   

   

   and

   

   Replace the tristimulus values R ₀ , G ₀ , and B ₀ of the low gray level with the tristimulus values R ₁ , G ₁ , and B ₁ of the first gray level to obtain the substituted coefficients

   

   and

   

   The relational expressions are:

   

   

   

   According to the coefficient after substitution

   

   and

   

   According to the relational expression, the chromaticity correction coefficients corresponding to the tristimulus values of the lamp points are respectively:

   
7. The method according to claim 1, further comprising: after acquiring the correction coefficients of the light points in the display screen to be corrected according to the target color parameter value and the color parameter values at each gray scale,

   Obtain the original color parameter value of the light point;

   The original color parameter value is corrected based on the correction coefficient to obtain the corrected color parameter value of the light point.
8. The method according to claim 1, wherein when the plurality of grayscales includes more than three grayscales, the ratio of the gamma value of the nth grayscale to the gamma value of the highest grayscale is obtained as the nth grayscale Brightness correction coefficient, where n is a positive integer.
9. The method according to claim 1, wherein said obtaining the correction coefficient of the light point in the display screen to be corrected according to the target color parameter value and the color parameter value under each of the gray scales includes: : When the color parameter value is a tristimulus value,

   According to the preset gamma values of multiple gray scales, a first chromaticity correction coefficient and a second chromaticity correction coefficient are obtained, wherein the multiple gray scales include the first gray scale, the second gray scale and the third gray scale grayscale;

   According to the target tristimulus value, the first chromaticity correction coefficient, the second chromaticity correction coefficient, and the tristimulus values at each gray scale, the chromaticity correction coefficients corresponding to the tristimulus values of the light points are obtained.
10. A device for determining a correction coefficient of a display lamp point, comprising:

    An image acquisition module, configured to acquire the original image of the display screen to be corrected;

    A data acquisition module, configured to collect color parameter values of each light point in preset multiple gray scales for any light point in the original image;

    A coefficient determination module, configured to obtain the target color parameter value of the light point, and obtain the light point value of the light point in the display screen to be corrected according to the target color parameter value and the color parameter values under each gray scale. Correction coefficient.
11. A computer device, comprising a memory and a processor, the memory stores a computer program, wherein the processor implements the steps of the method according to any one of claims 1 to 9 when executing the computer program.
12. A computer-readable storage medium, on which a computer program is stored, wherein, when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

Images