CN114638904B - Color difference system and method for realizing LCD (liquid crystal display) picture compensation of liquid crystal spliced screen based on color transition - Google Patents
Color difference system and method for realizing LCD (liquid crystal display) picture compensation of liquid crystal spliced screen based on color transition Download PDFInfo
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Abstract
A color difference system and method for realizing LCD picture compensation of a liquid crystal splicing screen based on color transition comprises the following steps: the LCD video frame image acquisition module is used for acquiring an LCD picture video frame image; LCD video frame image partition module for dividing LCD video frame image into j parts, each part corresponding to region C j (ii) a The LCD video frame image compensation coefficient calculation module; for compensation coefficient H j1 、H j2 、H j3 Carrying out normalization; for LCD picture video frame image area C j The compensation module is used for compensating the pixel values. According to the structural characteristics of the video image, the LCD video frame image is partitioned, the LCD video frame image compensation coefficient calculation is carried out on different areas, the obtained compensation coefficient is normalized, pixels which are larger than or smaller than the average value on a channel are compensated in different modes, and the LCD image which is high in resolution and free of chromatic aberration after compensation is obtained.
Description
Technical Field
The invention relates to the technical field of spliced screen color difference compensation, in particular to a color difference system and a method for realizing LCD (liquid crystal display) picture compensation of a liquid crystal spliced screen based on color transition.
Background
At present, with the continuous improvement of the scale and the speed of the LCD splicing screen, higher requirements are provided for fluency and color reality in use, but the judgment of human vision, energy and reaction time is limited, the LCD splicing screen with high color saturation and high resolution obtains higher requirements, the intelligent degree and the accuracy of color compensation are closely related to the user experience, and particularly in recent years, the splicing screen has greater popularization in large-scale conferences and exhibitions and plays an important role in the application of the LCD color resolution.
However, the traditional LCD splicing screen only displays a picture simply, and solves the problem of displaying basic information only, and the problems of large chromatic aberration, high distortion degree and low resolution ratio become the main problems of the LCD display screen in the using process, and the current color compensation mode only considers the picture adjustment of the whole LCD display screen and does not adjust the whole LCD display screen in a regional and targeted manner; the adjustment is only carried out aiming at the brightness of the whole background of the picture, the adaptive adjustment of specific color channel values is not carried out, the color compensation processing efficiency of video image data is low, the color difference compensation processing accuracy is low, the cost is high, and the requirements of users cannot be met; the color compensation is accurate, fast, convenient and fine, so that the method is necessary and urgent, and the user experience is improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a color difference system and a method for realizing LCD (liquid crystal display) picture compensation of a liquid crystal spliced screen based on color transition.
The technical scheme is realized as follows:
a color difference system for realizing LCD picture compensation of a liquid crystal splicing screen based on color transition comprises: the LCD video frame image acquisition module is used for acquiring an LCD picture video frame image; LCD video frame image partition module for dividing LCD video frame image into j parts, each part corresponding to region C j (ii) a LCD video frame image compensation coefficient calculation Module, area C j The compensation coefficients corresponding to the upper R channel, the G channel and the B channel are respectively H j1 、H j2 And H j3 ，H j1 、H j2 And H j3 Comprises the following steps:
wherein R is i Value, G, representing the R channel of the ith pixel of the video frame image i Value, B, representing the G channel of the ith pixel of the video frame image i Value, m, representing the B channel of the ith pixel of the video frame image j Represents a region C j Upper R channel mean, u j Represents a region C j Upper G channel mean, h j Represents a region C j Upper B channel mean, N denotes region C j The number of pixels of (a);
a normalization module: for R channel, G channel and B channel region C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
for LCD picture video frame image area C j Is compensated for, the pixel value of (a),
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i Y, G on the G channel i Less than u j The pixel compensated G channel value of (a) is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i *z。
Preferably, the LCD picture video frame image is divided into j parts, where j is an input value customized according to the LCD model.
Preferably, after the LCD picture video frame image is taken, the method further comprises preprocessing the video image, and filtering and denoising the video image information.
Preferably, when the pixel compensated channel value is greater than 255, the pixel channel value is 255.
A method for realizing LCD picture chromatic aberration compensation of a liquid crystal splicing screen based on color transition comprises the following steps: acquiring an LCD picture video frame image; dividing the video frame image of LCD picture into j parts, each part corresponding to region C j Then, region C j The compensation coefficients corresponding to the upper R channel, the G channel and the B channel are respectively H j1 、H j2 And H j3 ，H j1 、H j2 And H j3 Comprises the following steps:
wherein R is i Value, G, representing the R channel of the ith pixel of the video frame image i Value representing G channel of ith pixel of video frame image, B i Value, m, representing the B channel of the ith pixel of the video frame image j Represents a region C j Upper R channel mean, u j Represents a region C j Upper G channel mean, h j Represents a region C j Upper B channel mean, N denotes region C j The number of pixels of (a);
for R channel, G channel and B channel region C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
for LCD picture video frame image area C j Is compensated for, the pixel value of (a),
i.e. R on the R channel i Greater than m j The R channel value after pixel compensation is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i On the/y, G channel G i Less than u j The pixel compensated G channel value of is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i *z。
Preferably, the LCD picture video frame image is divided into j parts, where j is an input value customized according to the LCD model.
Preferably, the method further comprises preprocessing the video image after the LCD picture video frame image is taken, and filtering and denoising the video image information.
Preferably, when the pixel compensated channel value is greater than 255, the pixel channel value is 255.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the structural characteristics of the video image, the LCD video frame image is partitioned, the LCD video frame image compensation coefficient calculation is carried out on different areas, the obtained compensation coefficient is normalized, pixels which are larger than or smaller than the average value on a channel are compensated in different modes, and the LCD image which is high in resolution and free of chromatic aberration after compensation is obtained.
The invention creatively normalizes the compensation coefficient to realize the consideration of the whole and the details, namely R channel, G channel and B channel areas C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
in addition, the invention also provides LCD picturesArea C of the surface video frame image j The pixel value of the color filter is compensated, and the compensation of different pixel values can not be performed to a certain extent, so that the color resolution is improved;
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i On the/y, G channel G i Less than u j The pixel compensated G channel value of is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i Z; the color compensation effect is obviously enhanced through the above steps.
Drawings
FIG. 1 is a flow chart of a system and method for compensating color difference of LCD frames of a liquid crystal splicing screen based on color transition.
Detailed Description
The technical personnel in the field understand that, as the background art shows, the traditional LCD splicing screen is only a simple display picture, and solves the display problem of basic information, but the major problems of the LCD display screen are that the color difference is large, the distortion degree is high, and the resolution ratio is low in the use process, and the current color compensation mode only considers the picture adjustment of the whole LCD display screen and does not carry out regional targeted adjustment; the adjustment is only carried out aiming at the brightness of the whole background of the picture, the adaptive adjustment of specific color channel values is not carried out, the color compensation processing efficiency of video image data is low, the color difference compensation processing accuracy is low, the cost is high, and the requirements of users cannot be met; the color compensation is accurate, fast, convenient and fine, so that the method is necessary and urgent, and the user experience is improved. In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example 1:
the invention provides a color difference system for realizing LCD (liquid crystal display) picture compensation of a liquid crystal splicing screen based on color transition, which comprises: the LCD video frame image acquisition module is used for acquiring an LCD picture video frame image; LCD video frame image partition module for dividing LCD video frame image into j parts, each part corresponding to region C j (ii) a LCD video frame image compensation coefficient calculation Module, area C j The compensation coefficients corresponding to the upper R channel, the G channel and the B channel are respectively H j1 、H j2 And H j3 ，H j1 、H j2 And H j3 Comprises the following steps:
wherein R is i Value, G, representing the R channel of the ith pixel of the video frame image i Value, B, representing the G channel of the ith pixel of the video frame image i Value, m, representing the B channel of the ith pixel of the video frame image j Represents a region C j Upper R channel mean, u j Represents a region C j Upper G channel mean, h j Represents a region C j Upper B channel mean, N denotes region C j The number of pixels of (a);
a normalization module: for R channel, G channel and B channel region C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
for LCD picture video frame image area C j Is compensated for the pixel value of (a),
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i On the/y, G channel G i Less than u j The pixel compensated G channel value of is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i *z。
In some embodiments, the LCD picture video frame image is divided into j portions, where j is an input value customized according to the LCD model.
In some embodiments, the method further includes preprocessing the video image after the LCD picture video frame image is taken, and filtering and denoising the video image information.
In some embodiments, when the pixel compensated channel value is greater than 255, then the pixel channel value is taken to be 255.
Example 2:
the invention also discloses a method for realizing LCD picture chromatic aberration compensation of the liquid crystal splicing screen based on color transition, which comprises the following steps: acquiring an LCD picture video frame image; dividing the video frame image of LCD picture into j parts, each part corresponding to region C j Then region C j The compensation coefficients corresponding to the upper R channel, the G channel and the B channel are respectively H j1 、H j2 And H j3 ，H j1 、H j2 And H j3 Comprises the following steps:
wherein R is i Value, G, representing the R channel of the ith pixel of the video frame image i Value, B, representing the G channel of the ith pixel of the video frame image i Value, m, representing the B channel of the ith pixel of the video frame image j Represents a region C j Upper R channel mean, u j Represents a region C j Upper G channel mean, h j Represents a region C j Upper B channel mean, N denotes region C j The number of pixels of (a);
for R channel, G channel and B channel region C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
for LCD picture video frame image area C j Is compensated for, the pixel value of (a),
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The R channel value after pixel compensation is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i Y, G on the G channel i Less than u j The pixel compensated G channel value of (a) is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i *z。
In some embodiments, the LCD picture video frame image is divided into j portions, where j is an input value customized according to the LCD model.
In some embodiments, the method further includes preprocessing the video image after the LCD picture video frame image is taken, and filtering and denoising the video image information.
In some embodiments, when the pixel compensated channel value is greater than 255, then the pixel channel value is taken to be 255.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
according to the structural characteristics of the video image, the LCD video frame image is partitioned, the LCD video frame image compensation coefficients are calculated for different areas, the obtained compensation coefficients are normalized, pixels which are larger than or smaller than the average value on a channel are compensated in different modes, and the LCD image which is high in resolution and free of chromatic aberration after compensation is obtained.
The invention creatively normalizes the compensation coefficient to realize the consideration of the whole and the details, namely R channel, G channel and B channel areas C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
in addition, the invention also provides an LCD picture video frame image area C j The pixel value of the color filter is compensated, and the compensation of different pixel values can not be performed to a certain extent, so that the color resolution is improved;
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i On the/y, G channel G i Less than u j The pixel compensated G channel value of is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i Z; the color compensation effect is obviously enhanced through the above steps.
Those skilled in the art will appreciate that embodiments of the present application may be provided as a method, system, or computer program product and thus the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A color difference system for realizing LCD picture compensation of a liquid crystal splicing screen based on color transition is characterized by comprising: the LCD video frame image acquisition module is used for acquiring an LCD picture video frame image; LCD video frame image partition module for dividing LCD video frame image into j parts, each part corresponding to region C j (ii) a LCD video frame image compensation coefficient calculation Module, area C j The compensation coefficients corresponding to the upper R channel, the G channel and the B channel are respectively H j1 、H j2 And H j3 ，H j1 、H j2 And H j3 Comprises the following steps:
wherein R is i Value, G, representing the R channel of the ith pixel of the video frame image i Value, B, representing the G channel of the ith pixel of the video frame image i Value, m, representing the B channel of the ith pixel of the video frame image j Represents a region C j Upper R channel mean, u j Represents a region C j Upper G channel mean, h j Represents a region C j Upper B channel mean, N denotes region C j The number of pixels of (a);
a normalization module: for R channel, G channel and B channel region C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
for LCD picture video frame image area C j Is compensated for, the pixel value of (a),
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i On the/y, G channel G i Less than u j The pixel compensated G channel value of is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i *z。
2. The system of claim 1, wherein the video frame image of the LCD screen is divided into j portions, wherein j is an input value customized according to the LCD model.
3. The system of claim 1, wherein the system further comprises a pre-processing unit for pre-processing the video frame image and filtering and de-noising the video frame image after the video frame image of the LCD screen is taken.
4. The system of claim 2, wherein the pixel channel value is 255 when the pixel compensated channel value is greater than 255.
5. A method for realizing LCD picture chromatic aberration compensation of a liquid crystal splicing screen based on color transition is characterized by comprising the following steps: acquiring an LCD picture video frame image; dividing the LCD picture video frame image into j parts, each part corresponding toRegion is C j Then, region C j The compensation coefficients corresponding to the upper R channel, the G channel and the B channel are respectively H j1 、H j2 And H j3 ，H j1 、H j2 And H j3 Comprises the following steps:
wherein R is i Value, G, representing the R channel of the ith pixel of the video frame image i Value, B, representing the G channel of the ith pixel of the video frame image i Value, m, representing the B channel of the ith pixel of the video frame image j Represents a region C j Upper R channel mean, u j Represents a region C j Upper G channel mean, h j Represents a region C j Upper B channel mean, N denotes region C j The number of pixels of (a);
for R channel, G channel and B channel region C j Upper corresponding compensation coefficient H j1 、H j2 、H j3 Normalization is carried out, and normalization compensation coefficients x, y and z are obtained respectively;
for LCD picture video frame image area C j Is compensated for, the pixel value of (a),
i.e. R on the R channel i Greater than m j The pixel compensated R channel value is R i R on the/x, R channel i Less than m j The pixel compensated R channel value is R i *x；
G on the G channel i Greater than m j The pixel compensated G channel value of is G i On the/y, G channel G i Less than u j The pixel compensated G channel value of is G i *y；
On B channel B i Greater than m j The pixel compensated B channel value is B i B on the/z, B channel i Less than h j The pixel compensated B channel value is B i *z。
6. The method as claimed in claim 5, wherein the video frame image of the LCD screen is divided into j parts, j being an input value customized according to the LCD model.
7. The method as claimed in claim 5, wherein the method further comprises preprocessing the video image after the video frame image of the LCD screen is taken, and filtering and de-noising the video image information.
8. The method as claimed in claim 6, wherein the pixel channel value is 255 when the pixel compensated channel value is greater than 255.
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