CN112286604B - Color adjustment method and device for display picture and computer equipment - Google Patents
Color adjustment method and device for display picture and computer equipment Download PDFInfo
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Abstract
The application provides a color adjustment method, a device and computer equipment of a display picture, wherein a system firstly calculates a color difference average value between picture color of a current display picture and a color standard map. And judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value, if the average value of the chromatic aberration is more than the chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not more than the chromatic aberration threshold value. The color debugging method and device for the display screen have the advantages that manual intervention is not needed in the color debugging process of the display screen, and the whole process can be automatically realized, so that a large amount of manpower resources and time are effectively saved, and the debugging efficiency is improved. Meanwhile, the color debugging is based on a color standard map, has unified standard, and can effectively avoid the influence of subjective consciousness of debugging personnel on the final adjusting effect.
Description
Technical Field
The present disclosure relates to the field of image adjustment technologies, and in particular, to a method and an apparatus for adjusting color of a display image, and a computer device.
Background
In order to ensure perfect presentation of pictures, image colors by a display screen, existing engineers need to debug color by color for different customers, different image modes, or models of display devices, etc. Because of the need of engineers to manually adjust, a great deal of manpower resources and time are consumed, and the color effect of the debugged picture is also easily influenced by the subjective consciousness of the engineers, so that the debugging is not standard enough.
Disclosure of Invention
The main purpose of the application is to provide a color adjustment method, a device and a computer device for a display picture, which aim to solve the defects that the existing color adjustment method for the display picture is low in efficiency and needs to consume a large amount of human resources.
In order to achieve the above object, the present application provides a color adjustment method for a display screen, including:
calculating a color difference average value between the picture color of the display picture and a color standard map;
judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value or not;
and if the average value of the chromatic aberration is larger than the chromatic aberration threshold value, performing RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not larger than the chromatic aberration threshold value.
Further, the step of calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard spectrum includes:
acquiring picture color coordinates and picture brightness values of the picture colors;
converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating to obtain the color difference average value according to a CIE DE2000 color difference formula.
Further, the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and the step of comparing the frame tri-stimulus value with the standard tri-stimulus value of the color standard spectrum and calculating the color difference value according to the CIE DE2000 color difference formula includes:
measuring standard color coordinates and standard brightness values of the 24-standard spectrum or the 48-standard spectrum by a color analyzer;
and performing conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
Further, the step of performing RGB adjustment on the picture color according to a preset rule includes:
calculating a plurality of initial parameters of a matrix according to the RGB values corresponding to the color standard patterns and the three-color stimulus values of the picture;
Calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
calculating each parameter combination by using a least square method, and screening a group of parameter combinations corresponding to the minimum error;
calculating to obtain a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
writing the derived RGB values into a 3D RGB model to enable the 3D RGB model to debug the picture color according to the derived RGB values.
Preferably, the step of calculating a plurality of initial parameters of the matrix according to the RGB values corresponding to the color standard spectrum and the tristimulus values of the picture includes:
substituting the RGB value corresponding to the color standard map and the picture tri-stimulus value into a preset formula to obtain 9 initial parameters of the matrix, wherein the preset formula is as follows:
r, G, B is RGB value corresponding to the color standard map, X, Y, Z is the three colors of the picture
Further, the step of writing the derived RGB values into a 3D RGB model to enable the 3D RGB model to debug the picture color according to the derived RGB values includes:
Fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm, and writing the points into a 3D RGB LUT table;
writing the 3D RGB LUT table into display equipment corresponding to the display picture, so that the display equipment adjusts the picture color according to the deduced RGB value.
Stimulation value, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is the 9 initial parameters of the matrix.
Further, after the step of performing RGB adjustment on the picture colors according to the preset rule until the average value of the color differences between the adjusted picture colors and the color standard patterns is not greater than the color difference threshold value, the method includes:
acquiring equipment information of display equipment corresponding to the display picture, and recording a tri-stimulus value of the current picture color;
and correlating the tri-stimulus value with the equipment information and storing the tri-stimulus value and the equipment information into a cloud server.
The application also provides a color adjustment device of a display picture, which comprises:
the calculating module is used for calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard map;
the judging module is used for judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value;
and the debugging module is used for carrying out RGB debugging on the picture color according to a preset rule if the average value of the color difference is larger than a color difference threshold value until the average value of the color difference between the debugged picture color and the color standard map is not larger than the color difference threshold value.
Further, the computing module includes:
an acquisition unit for acquiring picture color coordinates and picture brightness values of the picture colors;
the conversion unit is used for converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
the first calculation unit is used for comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating the color difference average value according to a CIE DE2000 color difference formula.
Further, the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and the calculating module further includes:
a measurement unit for measuring standard color coordinates and standard brightness values of the 24-standard spectrum or the 48-standard spectrum by a color analyzer;
and the second calculation unit is used for carrying out conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
Further, the debugging module includes:
a third calculation unit, configured to calculate a plurality of initial parameters of a matrix according to the RGB values corresponding to the color standard spectrum and the tristimulus values of the picture;
the fourth calculation unit is used for calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
The screening unit is used for calculating each parameter combination by using a least square method and screening a group of parameter combinations corresponding to the minimum error;
a fifth calculation unit, configured to calculate a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
and the debugging unit is used for writing the derived RGB values into a 3D RGB model so that the 3D RGB model can debug the picture color according to the derived RGB values.
Preferably, the third computing unit includes:
the calculating subunit is configured to substitute the RGB value corresponding to the color standard spectrum and the tri-stimulus value of the picture into a preset formula, and calculate to obtain 9 initial parameters of the matrix, where the preset formula is:
r, G, B is RGB value corresponding to the color standard map, X, Y, Z is tri-stimulus value of the picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is the 9 initial parameters of the matrix.
Further, the debug unit includes:
the fitting subunit is used for fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm and writing the points into a 3D RGB LUT table;
and the writing subunit is used for writing the 3D RGB LUT table into display equipment corresponding to the display picture so as to enable the display equipment to adjust the picture color according to the deduced RGB value.
Further, the color debugging device further includes:
the recording module is used for acquiring the equipment information of the display equipment corresponding to the display picture and recording the tri-stimulus value of the current picture color;
and the association module is used for associating the tri-stimulus value with the equipment information and storing the tri-stimulus value to a cloud server.
The present application also provides a computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of any of the methods described above when the computer program is executed.
The present application also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of any of the above.
The color adjustment method, device and computer equipment for the display picture provided by the application are characterized in that a system firstly calculates a color difference average value between picture color of a current display picture and a color standard map. And judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value, if the average value of the chromatic aberration is more than the chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not more than the chromatic aberration threshold value. The color debugging method and device for the display screen have the advantages that manual intervention is not needed in the color debugging process of the display screen, and the whole process can be automatically realized, so that a large amount of manpower resources and time are effectively saved, and the debugging efficiency is improved. Meanwhile, the color debugging is based on a color standard map, has unified standard, and can effectively avoid the influence of subjective consciousness of debugging personnel on the final adjusting effect.
Drawings
FIG. 1 is a schematic diagram illustrating steps of a color adjustment method for a display according to an embodiment of the present disclosure;
FIG. 2 is a block diagram showing an overall structure of a color adjustment device for a display screen according to an embodiment of the present application;
fig. 3 is a block diagram schematically illustrating a structure of a computer device according to an embodiment of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Referring to fig. 1, in an embodiment of the present application, a color adjustment method for a display screen is provided, including:
s1, calculating a color difference average value between the picture color of the display picture and a color standard map;
s2, judging whether the average value of the chromatic aberration is not larger than a chromatic aberration threshold value;
and S3, if the average value of the chromatic aberration is larger than a chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not larger than the chromatic aberration threshold value.
In this embodiment, the system first obtains the frame color coordinates and the frame luminance value of the frame color of the currently displayed frame, and then converts the frame color coordinates and the frame luminance value to obtain the frame tri-stimulus value corresponding to the frame color. The system compares the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculates to obtain the average value of the color difference between the picture color and the color standard map through CIE DE2000 color difference formula. The system is internally provided with a color difference threshold value, compares the calculated color difference average value with the color difference threshold value, and judges the magnitude relation between the calculated color difference average value and the color difference threshold value. If the average value of the chromatic aberration is not greater than the chromatic aberration threshold value, the current picture color of the display picture accords with the set standard, and the next debugging action is not needed. If the average value of the chromatic aberration is larger than the chromatic aberration threshold value, the corresponding debugging of the picture color is needed. Preferably, the color difference threshold is set to 3, and the smaller the color difference threshold, the higher the accuracy of the picture color, and the better the reduction degree of the display picture to the color. The embodiment is set to 3, and is obtained by integrating the realizability and the production manufacturability, and can be rapidly realized in practical application on the premise of ensuring the accuracy of the picture color. The system performs RGB debugging on the picture colors according to a preset rule, calculates a color difference average value between the debugged picture colors and the color standard patterns again after the one-time debugging process is finished, and judges whether the adjusted color difference average value is larger than a color difference threshold value or not. If the adjusted average value of the color difference is not greater than the color difference threshold value, the system finishes the adjustment of the color of the picture. If the adjusted average value of the color difference is larger than the color difference threshold value, repeating the steps, and continuing RGB debugging on the basis of the adjusted picture color until the average value of the color difference between the debugged picture color and the color standard map is not larger than the color difference threshold value. Specifically, the system calculates a plurality of initial parameters of the matrix according to RGB values and screen tri-stimulus values corresponding to the color standard map, and then calculates each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations. The system calculates each parameter combination by using a least square method to obtain errors corresponding to the parameter combinations respectively, and screens out a group of parameter combinations corresponding to the minimum errors. And the system reversely calculates to obtain the deducted RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value. The system writes the derived RGB values into the 3D RGB model, so that the 3D RGB model automatically debugs the picture colors according to the derived RGB values, and RGB debugs the picture colors are realized.
Further, the step of calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard spectrum includes:
s101, obtaining picture color coordinates and picture brightness values of the picture colors;
s102, converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
s103, comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating to obtain the color difference average value according to a CIE DE2000 color difference formula.
In this embodiment, the system first collects the frame color coordinates x and Y of the frame color and the frame luminance value Lv (Y), and then converts the frame color coordinates x and Y and the frame luminance value Lv (Y) into a frame tri-stimulus value through a conversion formula. Wherein, the conversion formula is: x=xy/Y, y=lv (Y), z= (1-X-Y) Y/Y, X, Y, Z is a tristimulus value. Similarly, the system measures and reads the color coordinates and the brightness value of the color standard map through the color analyzer and converts the color coordinates and the brightness value into the standard tri-stimulus value (the standard tri-stimulus value can be recorded in the system database in advance by a debugger, so that real-time acquisition in the debugging process is not needed, and the debugging efficiency can be improved). The system compares the three-color stimulus value of the picture with the standard three-color stimulus value, substitutes the three-color stimulus value into a CIE DE2000 color difference formula, and calculates to obtain a color difference average value between the picture color and the color standard map.
Further, the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and before the step of comparing the frame tri-stimulus value with the standard tri-stimulus value of the color standard spectrum and calculating the color difference value of each color of the frame color according to the CIE DE2000 color difference formula, the method comprises the following steps:
s1031, measuring standard color coordinates and standard brightness values of the 24-standard map or the 48-standard map by a color analyzer;
s1032, carrying out conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
In this embodiment, the color standard spectrum adopts a 24-standard spectrum or a 48-standard spectrum, and uses this as a reference to debug the color of the picture, so as to improve the reduction degree of the color of the picture. The system obtains standard color coordinates and standard brightness values of a 24-standard map or a 48-standard map through measurement of a color analyzer. Then, the standard color coordinates and the standard luminance values are converted into standard tristimulus values by a conversion formula. According to the embodiment, the standard color coordinates and the standard brightness values of the color standard spectrum are acquired in real time, so that the comparison reference conditions of the color standard spectrum and the picture colors are the same (the same display equipment is arranged), and the reduction degree and the accuracy of the color of the adjusted picture are improved.
Further, the step of performing RGB adjustment on the picture color according to a preset rule includes:
s301, calculating a plurality of initial parameters of a matrix according to RGB values corresponding to the color standard map and the three-color stimulus values of the picture;
s302, calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
s303, calculating each parameter combination by using a least square method, and screening a group of parameter combinations corresponding to the minimum error;
s304, calculating to obtain a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
and S305, writing the derived RGB values into a 3D RGB model so that the 3D RGB model debugs the picture color according to the derived RGB values.
Preferably, the step of calculating a plurality of initial parameters of the matrix according to the RGB values corresponding to the color standard spectrum and the tristimulus values of the picture includes:
s3011, substituting the RGB value corresponding to the color standard map and the screen tri-stimulus value into a preset formula, and calculating to obtain 9 initial parameters of the matrix, wherein the preset formula is as follows: R, G, B is RGB value corresponding to the color standard map, X, Y, Z is tri-stimulus value of the picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is the 9 initial parameters of the matrix.
In this embodiment, the system pairs the color standard patternsThe corresponding RGB values and the corresponding screen tri-stimulus values of the screen colors are substituted into a preset formula, so that 9 initial parameters of the matrix are calculated. Wherein, the preset formula is:r, G, B is RGB value corresponding to color standard map, X, Y, Z is tri-stimulus value of picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is 9 initial parameters of the matrix. The system calculates 9 initial parameters in the matrix using a cubic difference approach, resulting in a plurality of parameter combinations. And then, calculating each parameter combination by using a least square method to obtain errors corresponding to each parameter combination, and screening a group of parameter combinations corresponding to the minimum errors (the smaller the errors are, the closer the three-color stimulus value of the representation picture is to the RGB value of the color standard map). And the system reversely calculates the deduction RGB value of the picture color by taking the screened parameter combination and the actually tested picture tri-stimulus value as known parameters according to the preset formula. The system writes the deduction into a 3D RGB model, and the 3D RGB model can automatically and correspondingly adjust the picture color of the display picture according to the deduction RGB value, so as to complete a one-time adjustment flow of the picture color.
Further, the step of writing the derived RGB values into a 3D RGB model to enable the 3D RGB model to debug the picture color according to the derived RGB values includes:
s3051, fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm, and writing the points into a 3D RGB LUT table;
and S3052, writing the 3D RGB LUT table into display equipment corresponding to the display picture so that the display equipment adjusts the picture color according to the deduced RGB value.
In this embodiment, the system may directly write the derived RGB values into the 3D RGB model, or may fit the derived RGB values before writing the model, so as to improve the accuracy of adjustment. Specifically, the system fits the derived RGB values to 17×17 points (or 8×8 points) through a cubic spline interpolation algorithm to improve the adjustment fineness, and then writes the result in a 3D RGB LUT table. The system writes the 3D RGB LUT table into the display equipment corresponding to the display picture, and after the display equipment reads the RGB LUT table, the color of the display picture can be adjusted according to parameters in the RGB LUT table, so that the adjustment of picture color according to the deduced RGB value is realized.
Further, after the step of performing RGB adjustment on the picture colors according to the preset rule until the average value of the color differences between the adjusted picture colors and the color standard patterns is not greater than the color difference threshold value, the method includes:
s4, acquiring equipment information of display equipment corresponding to the display picture, and recording a tri-stimulus value of the current picture color;
and S5, associating the tri-stimulus value with the equipment information and storing the tri-stimulus value and the equipment information into a cloud server.
In this embodiment, after the system completes the debugging of the screen color of the display screen, the system automatically acquires the device information (such as the brand, model, etc. information of the display screen) of the display device corresponding to the display screen, and records the tri-stimulus value (RGB value or color coordinate and brightness value) of the current screen color. The system correlates the tri-stimulus value with the equipment information, stores the tri-stimulus value into the cloud server, and can directly use the correlated tri-stimulus value to carry out picture color debugging when the display pictures with the same equipment information are subjected to color debugging later.
Preferably, after completing the debugging of the picture color of the display picture, detecting that the user manually adjusts the picture color again, recording the tri-stimulus value (RGB value or color coordinate and brightness value) of the current picture color after the user manually adjusts the picture color, and obtaining the user information (such as the user WeChat name and user-defined name) from the device. And then, associating the recorded tri-stimulus value of the picture color with the user information, uploading the tri-stimulus value to a cloud server for storage, and performing color debugging on the display picture automatically according to the tri-stimulus value of the picture color associated with the user information when the user information is detected on other devices (such as a notebook computer, a tablet computer and the like) with display equipment and a user starts a picture color adjusting function.
According to the color adjustment method of the display picture, the system firstly calculates the average value of the color difference between the picture color of the current display picture and the color standard map. And judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value, if the average value of the chromatic aberration is more than the chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not more than the chromatic aberration threshold value. In the color debugging process aiming at the display picture, the embodiment does not need manual intervention, and can be automatically realized in the whole process, so that a great deal of manpower resources and time are effectively saved, and the debugging efficiency is improved. Meanwhile, the color debugging is based on a color standard map, has unified standard, and can effectively avoid the influence of subjective consciousness of debugging personnel on the final adjusting effect.
Referring to fig. 2, in an embodiment of the present application, there is further provided a color adjustment device for a display screen, including:
the calculating module 1 is used for calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard map;
a judging module 2, configured to judge whether the average value of the chromatic aberration is not greater than a chromatic aberration threshold;
And the debugging module 3 is used for carrying out RGB debugging on the picture color according to a preset rule if the average value of the color difference is larger than a color difference threshold value until the average value of the color difference between the debugged picture color and the color standard map is not larger than the color difference threshold value.
In this embodiment, the system first obtains the frame color coordinates and the frame luminance value of the frame color of the currently displayed frame, and then converts the frame color coordinates and the frame luminance value to obtain the frame tri-stimulus value corresponding to the frame color. The system compares the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculates to obtain the average value of the color difference between the picture color and the color standard map through CIE DE2000 color difference formula. The system is internally provided with a color difference threshold value, compares the calculated color difference average value with the color difference threshold value, and judges the magnitude relation between the calculated color difference average value and the color difference threshold value. If the average value of the chromatic aberration is not greater than the chromatic aberration threshold value, the current picture color of the display picture accords with the set standard, and the next debugging action is not needed. If the average value of the chromatic aberration is larger than the chromatic aberration threshold value, the corresponding debugging of the picture color is needed. Preferably, the color difference threshold is set to 3, and the smaller the color difference threshold, the higher the accuracy of the picture color, and the better the reduction degree of the display picture to the color. The embodiment is set to 3, and is obtained by integrating the realizability and the production manufacturability, and can be rapidly realized in practical application on the premise of ensuring the accuracy of the picture color. The system performs RGB debugging on the picture colors according to a preset rule, calculates a color difference average value between the debugged picture colors and the color standard patterns again after the one-time debugging process is finished, and judges whether the adjusted color difference average value is larger than a color difference threshold value or not. If the adjusted average value of the color difference is not greater than the color difference threshold value, the system finishes the adjustment of the color of the picture. If the adjusted average value of the color difference is larger than the color difference threshold value, repeating the steps, and continuing RGB debugging on the basis of the adjusted picture color until the average value of the color difference between the debugged picture color and the color standard map is not larger than the color difference threshold value. Specifically, the system calculates a plurality of initial parameters of the matrix according to RGB values and screen tri-stimulus values corresponding to the color standard map, and then calculates each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations. The system calculates each parameter combination by using a least square method to obtain errors corresponding to the parameter combinations respectively, and screens out a group of parameter combinations corresponding to the minimum errors. And the system reversely calculates to obtain the deducted RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value. The system writes the derived RGB values into the 3D RGB model, so that the 3D RGB model automatically debugs the picture colors according to the derived RGB values, and RGB debugs the picture colors are realized.
Further, the computing module 1 includes:
an acquisition unit for acquiring picture color coordinates and picture brightness values of the picture colors;
the conversion unit is used for converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
the first calculation unit is used for comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating the color difference average value according to a CIE DE2000 color difference formula.
In this embodiment, the system first collects the frame color coordinates x and Y of the frame color and the frame luminance value Lv (Y), and then converts the frame color coordinates x and Y and the frame luminance value Lv (Y) into a frame tri-stimulus value through a conversion formula. Wherein, the conversion formula is: x=xy/Y, y=lv (Y), z= (1-X-Y) Y/Y, X, Y, Z is a tristimulus value. Similarly, the system measures and reads the color coordinates and the brightness value of the color standard map through the color analyzer and converts the color coordinates and the brightness value into the standard tri-stimulus value (the standard tri-stimulus value can be recorded in the system database in advance by a debugger, so that real-time acquisition in the debugging process is not needed, and the debugging efficiency can be improved). The system compares the three-color stimulus value of the picture with the standard three-color stimulus value, substitutes the three-color stimulus value into a CIE DE2000 color difference formula, and calculates to obtain a color difference average value between the picture color and the color standard map.
Further, the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and the computing module 1 further includes:
a measurement unit for measuring standard color coordinates and standard brightness values of the 24-standard spectrum or the 48-standard spectrum by a color analyzer;
and the second calculation unit is used for carrying out conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
In this embodiment, the color standard spectrum adopts a 24-standard spectrum or a 48-standard spectrum, and uses this as a reference to debug the color of the picture, so as to improve the reduction degree of the color of the picture. The system obtains standard color coordinates and standard brightness values of a 24-standard map or a 48-standard map through measurement of a color analyzer. Then, the standard color coordinates and the standard luminance values are converted into standard tristimulus values by a conversion formula. According to the embodiment, the standard color coordinates and the standard brightness values of the color standard spectrum are acquired in real time, so that the comparison reference conditions of the color standard spectrum and the picture colors are the same (the same display equipment is arranged), and the reduction degree and the accuracy of the color of the adjusted picture are improved.
Further, the debug module 3 includes:
A third calculation unit, configured to calculate a plurality of initial parameters of a matrix according to the RGB values corresponding to the color standard spectrum and the tristimulus values of the picture;
the fourth calculation unit is used for calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
the screening unit is used for calculating each parameter combination by using a least square method and screening a group of parameter combinations corresponding to the minimum error;
a fifth calculation unit, configured to calculate a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
and the debugging unit is used for writing the derived RGB values into a 3D RGB model so that the 3D RGB model can debug the picture color according to the derived RGB values.
Preferably, the third computing unit includes:
the calculating subunit is configured to substitute the RGB value corresponding to the color standard spectrum and the tri-stimulus value of the picture into a preset formula, and calculate to obtain 9 initial parameters of the matrix, where the preset formula is:
r, G, B is RGB value corresponding to the color standard map, X, Y, Z is tri-stimulus value of the picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 For 9 of the matrixInitial parameters.
In this embodiment, the system substitutes the RGB values corresponding to the color standard spectrum and the screen tri-stimulus values of the screen colors into a preset formula, so as to calculate and obtain 9 initial parameters of the matrix. Wherein, the preset formula is:r, G, B is RGB value corresponding to color standard map, X, Y, Z is tri-stimulus value of picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is 9 initial parameters of the matrix. The system calculates 9 initial parameters in the matrix using a cubic difference approach, resulting in a plurality of parameter combinations. And then, calculating each parameter combination by using a least square method to obtain errors corresponding to each parameter combination, and screening a group of parameter combinations corresponding to the minimum errors (the smaller the errors are, the closer the three-color stimulus value of the representation picture is to the RGB value of the color standard map). And the system reversely calculates the deduction RGB value of the picture color by taking the screened parameter combination and the actually tested picture tri-stimulus value as known parameters according to the preset formula. The system writes the deduction into a 3D RGB model, and the 3D RGB model can automatically and correspondingly adjust the picture color of the display picture according to the deduction RGB value, so as to complete a one-time adjustment flow of the picture color.
Further, the debug unit includes:
the fitting subunit is used for fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm and writing the points into a 3D RGB LUT table;
and the writing subunit is used for writing the 3D RGB LUT table into display equipment corresponding to the display picture so as to enable the display equipment to adjust the picture color according to the deduced RGB value.
In this embodiment, the system may directly write the derived RGB values into the 3D RGB model, or may fit the derived RGB values before writing the model, so as to improve the accuracy of adjustment. Specifically, the system fits the derived RGB values to 17x17x17 points (or 8x8x8 points) through a cubic spline interpolation algorithm to improve the adjustment fineness, and then writes the result in a 3D RGB LUT table. The system writes the 3D RGB LUT table into the display equipment corresponding to the display picture, and after the display equipment reads the RGB LUT table, the color of the display picture can be adjusted according to parameters in the RGB LUT table, so that the adjustment of picture color according to the deduced RGB value is realized.
Further, the color debugging device further includes:
the recording module 4 is used for acquiring the equipment information of the display equipment corresponding to the display picture and recording the tri-stimulus value of the current picture color;
And the association module 5 is used for associating the tri-stimulus value with the equipment information and storing the tri-stimulus value to a cloud server.
In this embodiment, after the system completes the debugging of the screen color of the display screen, the system automatically acquires the device information (such as the brand, model, etc. information of the display screen) of the display device corresponding to the display screen, and records the tri-stimulus value (RGB value or color coordinate and brightness value) of the current screen color. The system correlates the tri-stimulus value with the equipment information, stores the tri-stimulus value into the cloud server, and can directly use the correlated tri-stimulus value to carry out picture color debugging when the display pictures with the same equipment information are subjected to color debugging later.
Preferably, after completing the debugging of the picture color of the display picture, detecting that the user manually adjusts the picture color again, recording the tri-stimulus value (RGB value or color coordinate and brightness value) of the current picture color after the user manually adjusts the picture color, and obtaining the user information (such as the user WeChat name and user-defined name) from the device. And then, associating the recorded tri-stimulus value of the picture color with the user information, uploading the tri-stimulus value to a cloud server for storage, and performing color debugging on the display picture automatically according to the tri-stimulus value of the picture color associated with the user information when the user information is detected on other devices (such as a notebook computer, a tablet computer and the like) with display equipment and a user starts a picture color adjusting function.
In the color adjustment device for a display screen provided in this embodiment, a system first calculates a color difference average value between a screen color of a current display screen and a color standard spectrum. And judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value, if the average value of the chromatic aberration is more than the chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not more than the chromatic aberration threshold value. The color debugging method and device for the display screen have the advantages that manual intervention is not needed in the color debugging process of the display screen, and the whole process can be automatically realized, so that a large amount of manpower resources and time are effectively saved, and the debugging efficiency is improved. Meanwhile, the color debugging is based on a color standard map, has unified standard, and can effectively avoid the influence of subjective consciousness of debugging personnel on the final adjusting effect.
Referring to fig. 3, a computer device is further provided in the embodiment of the present application, where the computer device may be a server, and the internal structure of the computer device may be as shown in fig. 3. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the computer is configured to provide computing 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, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used for storing data such as color difference threshold values. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a method of color adjustment of a display.
The processor executes the steps of the color adjustment method of the display picture:
s1, calculating a color difference average value between the picture color of the display picture and a color standard map;
s2, judging whether the average value of the chromatic aberration is not larger than a chromatic aberration threshold value;
and S3, if the average value of the chromatic aberration is larger than a chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not larger than the chromatic aberration threshold value.
Further, the step of calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard spectrum includes:
s101, obtaining picture color coordinates and picture brightness values of the picture colors;
s102, converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
s103, comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating to obtain the color difference average value according to a CIE DE2000 color difference formula.
Further, the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and before the step of comparing the frame tri-stimulus value with the standard tri-stimulus value of the color standard spectrum and calculating the color difference value of each color of the frame color according to the CIE DE2000 color difference formula, the method comprises the following steps:
S1031, measuring standard color coordinates and standard brightness values of the 24-standard map or the 48-standard map by a color analyzer;
s1032, carrying out conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
Further, the step of performing RGB adjustment on the picture color according to a preset rule includes:
s301, calculating a plurality of initial parameters of a matrix according to RGB values corresponding to the color standard map and the three-color stimulus values of the picture;
s302, calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
s303, calculating each parameter combination by using a least square method, and screening a group of parameter combinations corresponding to the minimum error;
s304, calculating to obtain a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
and S305, writing the derived RGB values into a 3D RGB model so that the 3D RGB model debugs the picture color according to the derived RGB values.
Preferably, the step of calculating a plurality of initial parameters of the matrix according to the RGB values corresponding to the color standard spectrum and the tristimulus values of the picture includes:
S3011, substituting the RGB value corresponding to the color standard map and the screen tri-stimulus value into a preset formula, and calculating to obtain 9 initial parameters of the matrix, wherein the preset formula is as follows:r, G, B is RGB value corresponding to the color standard map, X, Y, Z is tri-stimulus value of the picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is the 9 initial parameters of the matrix.
Further, the step of writing the derived RGB values into a 3D RGB model to enable the 3D RGB model to debug the picture color according to the derived RGB values includes:
s3051, fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm, and writing the points into a 3D RGB LUT table;
and S3052, writing the 3D RGB LUT table into display equipment corresponding to the display picture so that the display equipment adjusts the picture color according to the deduced RGB value.
Further, after the step of performing RGB adjustment on the picture colors according to the preset rule until the average value of the color differences between the adjusted picture colors and the color standard patterns is not greater than the color difference threshold value, the method includes:
s4, acquiring equipment information of display equipment corresponding to the display picture, and recording a tri-stimulus value of the current picture color;
And S5, associating the tri-stimulus value with the equipment information and storing the tri-stimulus value and the equipment information into a cloud server.
An embodiment of the present application further provides a computer readable storage medium having a computer program stored thereon, the computer program when executed by a processor implementing a color adjustment method for a display screen, where the color adjustment method includes:
s1, calculating a color difference average value between the picture color of the display picture and a color standard map;
s2, judging whether the average value of the chromatic aberration is not larger than a chromatic aberration threshold value;
and S3, if the average value of the chromatic aberration is larger than a chromatic aberration threshold value, carrying out RGB debugging on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not larger than the chromatic aberration threshold value.
Further, the step of calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard spectrum includes:
s101, obtaining picture color coordinates and picture brightness values of the picture colors;
s102, converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
s103, comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating to obtain the color difference average value according to a CIE DE2000 color difference formula.
Further, the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and before the step of comparing the frame tri-stimulus value with the standard tri-stimulus value of the color standard spectrum and calculating the color difference value of each color of the frame color according to the CIE DE2000 color difference formula, the method comprises the following steps:
s1031, measuring standard color coordinates and standard brightness values of the 24-standard map or the 48-standard map by a color analyzer;
s1032, carrying out conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
Further, the step of performing RGB adjustment on the picture color according to a preset rule includes:
s301, calculating a plurality of initial parameters of a matrix according to RGB values corresponding to the color standard map and the three-color stimulus values of the picture;
s302, calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
s303, calculating each parameter combination by using a least square method, and screening a group of parameter combinations corresponding to the minimum error;
s304, calculating to obtain a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
And S305, writing the derived RGB values into a 3D RGB model so that the 3D RGB model debugs the picture color according to the derived RGB values.
Preferably, the step of calculating a plurality of initial parameters of the matrix according to the RGB values corresponding to the color standard spectrum and the tristimulus values of the picture includes:
s3011, substituting the RGB value corresponding to the color standard map and the screen tri-stimulus value into a preset formula, and calculating to obtain 9 initial parameters of the matrix, wherein the preset formula is as follows:r, G, B is RGB value corresponding to the color standard map, X, Y, Z is tri-stimulus value of the picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is the 9 initial parameters of the matrix.
Further, the step of writing the derived RGB values into a 3D RGB model to enable the 3D RGB model to debug the picture color according to the derived RGB values includes:
s3051, fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm, and writing the points into a 3D RGB LUT table;
and S3052, writing the 3D RGB LUT table into display equipment corresponding to the display picture so that the display equipment adjusts the picture color according to the deduced RGB value.
Further, after the step of performing RGB adjustment on the picture colors according to the preset rule until the average value of the color differences between the adjusted picture colors and the color standard patterns is not greater than the color difference threshold value, the method includes:
s4, acquiring equipment information of display equipment corresponding to the display picture, and recording a tri-stimulus value of the current picture color;
and S5, associating the tri-stimulus value with the equipment information and storing the tri-stimulus value and the equipment information into a cloud server.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by hardware associated with a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium provided herein and used in embodiments may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual speed data rate SDRAM (SSRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, apparatus, article or method that comprises the element.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (8)
1. A color adjustment method for a display screen, comprising:
calculating a color difference average value between the picture color of the display picture and a color standard map;
judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value or not;
If the average value of the chromatic aberration is larger than a chromatic aberration threshold value, RGB debugging is carried out on the picture color according to a preset rule until the average value of the chromatic aberration between the debugged picture color and the color standard map is not larger than the chromatic aberration threshold value;
the step of calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard map comprises the following steps:
acquiring picture color coordinates and picture brightness values of the picture colors;
converting the picture color coordinates and the picture brightness value into a picture tri-stimulus value;
comparing the three-color stimulus value of the picture with the standard three-color stimulus value of the color standard map, and calculating to obtain the color difference average value according to a CIE DE2000 color difference formula;
the step of performing RGB debugging on the picture color according to a preset rule includes:
calculating a plurality of initial parameters of a matrix according to the RGB values corresponding to the color standard patterns and the three-color stimulus values of the picture;
calculating each initial parameter by using a cubic difference algorithm to obtain a plurality of parameter combinations;
calculating each parameter combination by using a least square method, and screening a group of parameter combinations corresponding to the minimum error;
Calculating to obtain a derived RGB value of the picture color according to the parameter combination corresponding to the minimum error and the picture tri-stimulus value;
writing the derived RGB values into a 3D RGB model to enable the 3D RGB model to debug the picture color according to the derived RGB values.
2. The method for adjusting color of a display screen according to claim 1, wherein the color standard spectrum is a 24-standard spectrum or a 48-standard spectrum, and the step of comparing the tristimulus values of the screen with the standard tristimulus values of the color standard spectrum to calculate the color difference average value according to CIE DE2000 color difference formula comprises:
measuring standard color coordinates and standard brightness values of the 24-standard spectrum or the 48-standard spectrum by a color analyzer;
and performing conversion operation on the standard color coordinates and the standard color coordinates to obtain the standard tri-stimulus value.
3. The method according to claim 1, wherein the step of writing the derived RGB values into a 3D RGB model to cause the 3D RGB model to debug the picture color according to the derived RGB values comprises:
Fitting the derived RGB values into 17x17x17 points through a cubic spline interpolation algorithm, and writing the points into a 3D RGB LUT table;
writing the 3D RGB LUT table into display equipment corresponding to the display picture, so that the display equipment adjusts the picture color according to the deduced RGB value.
4. The method according to claim 1, wherein the step of calculating a plurality of initial parameters of a matrix from RGB values corresponding to the color standard spectrum and the screen tri-stimulus values comprises:
substituting the RGB value corresponding to the color standard map and the picture tri-stimulus value into a preset formula to obtain 9 initial parameters of the matrix, wherein the preset formula is as follows:r, G, B is RGB value corresponding to the color standard map, X, Y, Z is tri-stimulus value of the picture, a 1 、b 1 、c 1 、a 2 、b 2 、c 2 、a 3 、b 3 、c 3 Is the 9 initial parameters of the matrix.
5. The method for adjusting color of a display screen according to claim 1, wherein the step of RGB adjusting the color of the screen according to a preset rule until a color difference average value between the adjusted color of the screen and a color standard map is not greater than a color difference threshold value comprises:
Acquiring equipment information of display equipment corresponding to the display picture, and recording a tri-stimulus value of the current picture color;
and correlating the tri-stimulus value with the equipment information and storing the tri-stimulus value and the equipment information into a cloud server.
6. A color adjustment device for a display screen, for performing the method of any one of claims 1 to 5, comprising:
the calculating module is used for calculating the average value of the chromatic aberration between the picture color of the display picture and the color standard map;
the judging module is used for judging whether the average value of the chromatic aberration is not more than a chromatic aberration threshold value;
and the debugging module is used for carrying out RGB debugging on the picture color according to a preset rule if the average value of the color difference is larger than a color difference threshold value until the average value of the color difference between the debugged picture color and the color standard map is not larger than the color difference threshold value.
7. A computer device comprising a memory and a processor, the memory having stored therein a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 5.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 5.
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| CN114968466A (en) * | 2022-07-14 | 2022-08-30 | 深圳市明源云空间电子商务有限公司 | Page color matching adjustment method and device, electronic equipment and storage medium |
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