CN115482776B - Method, system and device for correcting bright and dark lines of virtual pixel display screen and display system - Google Patents
Method, system and device for correcting bright and dark lines of virtual pixel display screen and display system Download PDFInfo
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Abstract
Bright dark line of virtual pixel display screen is revised, system, device and display system relates to virtual display technical field, has solved the limited problem of current display screen concatenation gap correction technique application. The method comprises the following steps: respectively carrying out image acquisition on red, green and blue sub-pixel k-spacing points during red, green and blue monochromatic display, and selecting a noise mean value for the acquired image edge; processing the collected images at every k points to obtain simulated collected images at every 2k points; extracting coordinates of each sub-pixel brightness peak point in the image acquired by simulating every 2k points, and recording the coordinates as a matrix (CRx (i, j) and CRy (i, j)), wherein i is more than or equal to 1 and less than or equal to the number of longitudinal points of the image acquired at one time, and j is more than or equal to 1 and less than or equal to the number of transverse points of the image acquired at one time; respectively calculating the longitudinal gap correction ratio K v And a transverse gap correction ratio K h (ii) a Correcting the longitudinal gap by a ratio K v And a transverse gap correction ratio K h Sequentially multiplying the correction coefficient matrix K to obtain the corrected coefficient matrix K after seam repair final 。
Description
Technical Field
The invention relates to the technical field of virtual display, in particular to a method, a system, a device and a display system for correcting bright and dark lines of a virtual pixel display screen.
Background
The LED virtual pixel display screen has the technical advantages of high lamp point utilization rate, high brightness, wireless splicing and the like, but different lamp point arrangement modes can directly influence the positioning of the lamp points, errors exist in the splicing process, and when the splicing gap is larger than or smaller than the standard point distance, dark lines or bright lines exist at the splicing position of the display screen, so that the display quality is reduced.
In order to eliminate bright and dark lines, gap correction needs to be performed after point-by-point positioning correction of the display screen, namely, the brightness of the lamp points on two sides is adjusted according to the physical distance between the spliced box bodies. The gap correction technology is used as a display effect optimization technology after collection and correction, calculation is usually performed according to data obtained through collection and correction, and in the point-by-point positioning and correction process of the LED virtual pixel display screen, the smaller the collection interval is, the higher the collection efficiency is. Therefore, in order to realize more efficient acquisition, the pixel pitch needs to be reduced to reduce the point-to-point acquisition interval, and the crosstalk between pixels is increased, so that the seam repair effect is poor; and re-shooting a group of pictures for gap correction affects the acquisition efficiency.
At present, the technical field of splicing gap correction of the LED virtual pixel display screen is still in a starting stage, and technical schemes proposed in the industry only aim at a certain pixel multiplexing mode and have the defect of application limitation.
Disclosure of Invention
The invention provides a method, a system and a device for correcting bright and dark lines of a virtual pixel display screen and a display system, and aims to solve the problem that the application of the existing display screen splicing gap correction technology is limited.
The technical scheme of the invention is as follows:
a method for correcting bright and dark lines of a virtual pixel display screen comprises the following steps:
s1, respectively carrying out image acquisition on red, green and blue sub-pixel k-spacing points during red, green and blue monochromatic display, and respectively selecting a noise mean value for the acquired image edges;
s2, processing the images acquired at the interval points k to obtain images acquired by simulating the interval points 2 k;
s3, extracting coordinates of each sub-pixel brightness peak point in the image acquired by simulating every 2k points, and recording the coordinates as a matrix (CRx (i, j), CRy (i, j)), wherein i is more than or equal to 1 and less than or equal to the number of longitudinal points of the image acquired at one time, and j is more than or equal to 1 and less than or equal to the number of transverse points of the image acquired at one time;
s4, respectively calculating the correction proportion K of the longitudinal gap v And a transverse gap correction ratio K h ；
S5, correcting the longitudinal gap by a ratio K v And a transverse gap correction ratio K h In turn with the correction coefficient momentMultiplying the matrix K to obtain a correction coefficient matrix K after seam repair final ：
Wherein m represents the width of a real pixel in a single module of the display screen, n represents the height of the real pixel in the single module of the display screen, p represents the number of module columns of the whole screen, and q represents the number of module rows of the whole screen;
and S6, loading the correction coefficient matrix after seam repair into a transmitter, and sending the correction coefficient matrix to an LED display screen terminal to finish bright and dark line correction of the display screen.
Preferably, step S2 further comprises the steps of:
s21, reading an image collected at every k point, extracting a point coordinate with the highest brightness in each sub-pixel point, and recording the point coordinate as a matrix (ARx (i, j), ARy (i, j)), wherein the corresponding brightness value is AR (i, j);
s22, with each point in the matrix AR as a center, respectively searching a first brightness minimum value in four directions of up, down, left and right, and selecting a range BR (i, j) of each sub-pixel according to a coordinate frame of the four minimum values;
s23, reserving the brightness information of BR (2 i-1, 2j-1) positions, and replacing the brightness information of the rest positions with the noise mean value obtained in the step S1 to obtain local information of the collected images at intervals of 2 k;
and S24, performing surface fitting on the brightness and the coordinate value of the BR (2 i-1, 2j-1) position, calculating the brightness value of a pixel around the BR (2 i-1, 2j-1), and assigning the position of which the brightness value is smaller than the noise mean value after fitting as the noise mean value, namely finishing simulating the pictures acquired at the interval 2k according to the pictures acquired at the interval k.
Preferably, the correction ratio K of the longitudinal gap in step S4 v The calculation method comprises the following steps:
(1) Computing two laterally adjacent modulesTwo rightmost columns of point horizontal coordinate differences D of middle and left side modules left ：
(2) Calculating the difference D between the horizontal coordinates of two leftmost columns of points of the right module in two transversely adjacent modules right ：
(3) Calculating the vertical standard spacing:
(4) Calculating the longitudinal nonstandard spacing:
(5) Calculating the correction proportion of the longitudinal gap:
preferably, the correction ratio K of the transverse gap in step S4 h The calculation method comprises the following steps:
(1) Calculating the difference D of the longitudinal coordinates of two lowermost columns of points of the upper module in two longitudinally adjacent modules up ：
(2) Calculating the difference D between the vertical coordinates of two columns of the uppermost point of the lower module in two longitudinally adjacent modules down ：
(3) Calculating the transverse standard spacing:
(4) Calculating the transverse nonstandard spacing:
(5) Calculating a transverse gap correction ratio:
a virtual pixel display screen bright and dark line correction system is used for realizing the virtual pixel display screen bright and dark line correction method, and comprises an LED pixel brightness acquisition module, a pixel brightness value calculation module, a correction coefficient generation module, a gap correction proportion calculation module and a coefficient uploading module;
the LED pixel brightness acquisition module is used for acquiring a display screen pixel lamp image, the pixel brightness value calculation module is used for extracting and calculating the brightness value of each pixel according to the shot lamp image, the correction coefficient generation module is used for calculating point-by-point red, green and blue correction coefficients according to the extracted brightness value, the gap correction proportion calculation module is used for calculating a gap correction proportion and combining the gap correction proportion with the correction coefficient to realize compensation of bright and dark lines of a screen, and the coefficient uploading module is used for transmitting the corrected gap correction coefficient to a receiving card to realize bright and dark line correction of a display effect.
A bright and dark line correction device of a virtual pixel display screen comprises the bright and dark line correction system of the virtual pixel display screen.
A virtual pixel LED display system comprises the bright and dark line correction device of the virtual pixel display screen, the virtual pixel LED display screen and a receiving card;
the bright and dark line correction device of the virtual pixel display screen is used for issuing the corrected coefficients after seam repair to the receiving card, and the receiving card is used for carrying out differentiation control according to the corrected coefficients after seam repair so as to achieve bright and dark line correction display of the virtual pixel LED display screen.
Compared with the prior art, the invention solves the problem that the application of the splicing gap correction technology of the existing display screen is limited, and has the following specific beneficial effects:
1. the invention adopts the technical route of respectively correcting the sub-pixels, is suitable for correcting the gaps of different pixel arrangement modes, does not need to shoot the picture aiming at the gap correction again, ensures the correction efficiency, solves the problem of crosstalk between the pixels and improves the gap correction proportion precision;
2. the data below the threshold noise is calculated through surface fitting, the large interval data suitable for gap correction is simulated according to the small interval data acquired and corrected normally, the point eliminating processing is carried out according to the images acquired in alternate rows while the acquisition and correction efficiency is not reduced, the data crosstalk between lamp points is reduced, the image noise is eliminated, and the efficient and accurate gap correction is realized.
Drawings
FIG. 1 is a waveform diagram of monochrome brightness values of red, green and blue sub-pixels acquired at k-spaced points;
FIG. 2 is a waveform diagram of monochrome brightness values of red, green and blue sub-pixels collected at 2k points;
FIG. 3 is a schematic view of the pixel layout of the quadruple virtual pixel display panel according to example 8;
FIG. 4 is a schematic diagram showing the display effect of a quadruple virtual pixel display screen before seam repair processing;
FIG. 5 is a schematic diagram showing the display effect of the quadruple virtual pixel display screen after the seam repair processing;
fig. 6 is a schematic view of the pixel arrangement of the six-fold virtual pixel display screen in example 9;
FIG. 7 is a schematic view of a display effect of a six-fold virtual pixel display screen before seam repair processing;
fig. 8 is a schematic view of a display effect of a six-fold virtual pixel display screen after seam repair processing.
Detailed Description
In order to make the technical solutions of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specification of the present invention, and it should be noted that the following embodiments are only used for better understanding of the technical solutions of the present invention, and should not be construed as limiting the present invention.
Example 1.
The embodiment provides a method for correcting bright and dark lines of a virtual pixel display screen, which specifically comprises the following steps:
s1, respectively carrying out image acquisition on red, green and blue sub-pixel k-spacing points during red, green and blue monochromatic display, and respectively selecting a noise mean value for the acquired image edge;
s2, processing the images acquired at the interval points k to obtain images acquired by simulating the interval points 2 k;
s3, extracting coordinates of each sub-pixel brightness peak point in the image acquired by simulating every 2k points, and recording the coordinates as a matrix (CRx (i, j), CRy (i, j)), wherein i is more than or equal to 1 and less than or equal to the number of longitudinal points of the image acquired at one time, and j is more than or equal to 1 and less than or equal to the number of transverse points of the image acquired at one time;
s4, respectively calculating the longitudinal gap correction proportion K v And a transverse gap correction ratio K h ；
S5, correcting the longitudinal gap by a ratio K v And a transverse gap correction ratio K h Sequentially multiplying the correction coefficient matrix K to obtain the corrected coefficient matrix K after seam repair final ：
Wherein m represents the width of a real pixel in a single module of the display screen, n represents the height of the real pixel in the single module of the display screen, p represents the number of module columns of the whole screen, and q represents the number of module rows of the whole screen;
and S6, loading the correction coefficient matrix after seam repair into a transmitter, and sending the correction coefficient matrix to an LED display screen terminal to finish bright and dark line correction of the display screen.
Fig. 1 is a waveform diagram of monochrome brightness values of red, green and blue sub-pixels acquired at k-spaced points, and fig. 2 is a waveform diagram of monochrome brightness values of red, green and blue sub-pixels acquired at 2 k-spaced points; the embodiment adopts the technical route of sub-pixel respective correction, and is suitable for the gap correction of different pixel arrangement modes. The picture for gap correction does not need to be shot again, the problem of crosstalk between pixels is solved while the correction efficiency is ensured, and the gap correction proportion precision is improved.
Example 2.
This embodiment is a further illustration of embodiment 1, and step S2 further includes the following steps:
s21, reading an image collected at every k point, extracting a point coordinate with the highest brightness in each sub-pixel point, and recording the point coordinate as a matrix (ARx (i, j), ARy (i, j)), wherein the corresponding brightness value is AR (i, j);
s22, with each point in the matrix AR as a center, respectively searching a first brightness minimum value in four directions of up, down, left and right, and selecting a range BR (i, j) of each sub-pixel according to a coordinate frame of the four minimum values;
s23, reserving the brightness information of BR (2 i-1, 2j-1) positions, and replacing the brightness information of the rest positions with the noise mean value obtained in the step S1 to obtain local information of the collected images at intervals of 2 k;
and S24, performing surface fitting on the brightness and the coordinate value of the BR (2 i-1, 2j-1) position, calculating the brightness value of the pixel around the BR (2 i-1, 2j-1), and assigning the position with the brightness value smaller than the noise mean value after fitting as the noise mean value, namely finishing simulating the pictures collected at the interval 2k according to the pictures collected at the interval k.
According to the method, the data below the threshold noise is calculated through surface fitting, the large interval data suitable for gap correction is simulated according to the small interval data collected and corrected normally, the collection correction efficiency is not reduced, meanwhile, the point eliminating processing is carried out according to the images collected in alternate rows, the data crosstalk between lamp points is reduced, the elimination of image noise is completed, and efficient and accurate gap correction is achieved.
Example 3.
This embodiment is a further illustration of embodiment 1, and the correction ratio K of the longitudinal gap in step S4 is described v The calculation method comprises the following steps:
(1) Calculating the difference D of the transverse coordinates of two rightmost columns of points of the left module in two transversely adjacent modules left ：
(2) Calculating the difference D between the horizontal coordinates of two leftmost columns of points of the right module in two transversely adjacent modules right ：
(3) Calculating the vertical standard spacing:
(4) Calculating the longitudinal nonstandard spacing:
(5) Calculating the correction proportion of the longitudinal gap:
example 4.
This embodiment is a further illustration of embodiment 1, and the correction ratio K of the transverse gap in step S4 is described h The calculation method comprises the following steps:
(1) Calculating the difference D between the longitudinal coordinates of two columns of the lowermost points of the upper module in two longitudinally adjacent modules up ：
(2) Calculating the difference D between the vertical coordinates of two columns of the uppermost point of the lower module in two longitudinally adjacent modules down ：
(3) Calculating the transverse standard spacing:
(4) Calculating the transverse nonstandard spacing:
(5) Calculating a transverse gap correction ratio:
example 5.
The embodiment provides a system for correcting bright and dark lines of a virtual pixel display screen, which is used for realizing the method for correcting the bright and dark lines of the virtual pixel display screen according to any one of embodiments 1 to 4, and the system comprises an LED pixel brightness acquisition module, a pixel brightness value calculation module, a correction coefficient generation module, a gap correction proportion calculation module and a coefficient uploading module;
the LED pixel brightness acquisition module is used for acquiring a pixel light picture of a display screen, the pixel brightness value calculation module is used for extracting and calculating the brightness value of each pixel according to the shot light picture, the correction coefficient generation module is used for calculating point-by-point red, green and blue correction coefficients according to the extracted brightness values, the gap correction proportion calculation module is used for calculating a gap correction proportion and combining the gap correction proportion with the correction coefficients so as to realize compensation of bright and dark lines of the screen, and the coefficient uploading module is used for issuing the corrected gap correction coefficients to a receiving card to realize bright and dark line correction of a display effect.
Example 6.
The present embodiment provides a bright and dark line correction apparatus for a virtual pixel display panel, including the bright and dark line correction system of embodiment 5.
Example 7.
The embodiment provides a virtual pixel LED display system, which includes the bright and dark line correction device of the virtual pixel display screen described in embodiment 6, a virtual pixel LED display screen, and a receiving card;
the bright and dark line correction device of the virtual pixel display screen is used for issuing the corrected coefficients after seam repair to the receiving card, and the receiving card is used for carrying out differentiation control according to the corrected coefficients after seam repair so as to achieve bright and dark line correction display of the virtual pixel LED display screen.
Example 8.
This embodiment uses a quadruple virtual pixel display screen where the green light is a multiplexed pixel, as shown in fig. 3. Every 4 points are collected to obtain two groups of correction coefficient matrixes of red, blue, single color and green, and the correction coefficient matrixes are uploaded to a control system after being corrected by bright and dark lines, wherein the specific implementation process is as follows:
selecting noise mean values sr, sg1, sg2 and sb of the image edges after the red, green and blue sub-pixels are collected;
extracting the coordinates of the points with the highest brightness in each sub-pixel point, and recording the coordinates as matrixes (ARx (i, j), ARy (i, j)), (AG 1x (i, j), AG1y (i, j)), (AG 2x (i, j), AG2y (i, j)), (ABx (i, j), ABy (i, j)) with the brightness values of AR (i, j), AG1 (i, j), AG2 (i, j), AB (i, j), wherein i is more than or equal to 1 and less than or equal to the number of longitudinal points of a single-time acquisition picture, and j is more than or equal to 1 and less than or equal to the number of transverse points of the single-time acquisition picture;
taking each point in the matrixes AR, AG1, AG2 and AB as a center, respectively searching a first brightness minimum value in four directions of up, down, left and right, and selecting the range BR (i, j), BG1 (i, j), BG2 (i, j) and BB (i, j) of each red sub-pixel according to a coordinate frame of the four minimum values;
reserving brightness information of BR (2 i-1, 2j-1), BG1 (2 i-1, 2j-1), BG2 (2 i-1, 2j-1) and BB (2 i-1, 2j-1), and replacing brightness information of other positions with sr, sg1, sg2 and sb to obtain local information of the collected images at 8 points;
performing surface fitting on the brightness and coordinate values in BR (2 i-1, 2j-1), BG1 (2 i-1, 2j-1), BG2 (2 i-1, 2j-1) and BB (2 i-1, 2j-1), calculating the brightness values of pixels around BR (2 i-1, 2j-1), BG1 (2 i-1, 2j-1), BG2 (2 i-1, 2j-1) and BB (2 i-1, 2j-1), and assigning the positions of brightness values smaller than sr, sg1, sg2 and sb after fitting to sr, sg1, sg2 and sb as sr, sg1, sg2 and sb, namely finishing simulating pictures collected at 8 points according to the pictures collected at 4 points;
recording the brightness peak coordinates of each pixel after the curved surface is fitted and setting the coordinates as a matrix (CRx (i, j), CRy (i, j), CG1x (i, j), CG1y (i, j), CG2x (i, j), CG2y (i, j), CBx (i, j), CBy (i, j));
and setting the real pixel width of a single module of the LED display screen as 160, the height as 120, the total screen number as 9 rows and 12 columns of modules, and substituting the parameters into a formula to obtain correction coefficient matrixes Kfinal-R, kfinal-G1, kfinal-G2 and Kfinal-B after seam repair.
And loading the correction coefficient after the seam repair into a transmitter and sending the correction coefficient to an LED display screen terminal.
Fig. 4 is a schematic view of a display effect before trimming, and fig. 5 is a schematic view of a display effect after trimming, which shows that a slight dark line exists at a splicing seam before trimming the quadruple virtual pixel display screen, and the dark line is eliminated after the trimming by the method of the embodiment.
Example 9.
In this embodiment, a six-fold virtual pixel display screen is selected, as shown in fig. 6, a red, green, blue and monochrome correction coefficient matrix is acquired at 4 intervals, and is uploaded to the control system after being corrected by bright and dark lines, and the specific implementation process is as follows:
selecting noise mean values sr, sg and sb of the image edges after the red, green and blue sub-pixels are collected;
extracting the point coordinate with the highest brightness in each sub-pixel point, and recording the point coordinate as a matrix (ARx (i, j), ARy (i, j)), (AGx (i, j), AGy (i, j)) and (ABx (i, j), ABy (i, j)) with the brightness values of AR (i, j), AG1 (i, j) and AB (i, j) respectively, wherein i is more than or equal to 1 and less than or equal to the number of longitudinal points of the single-time acquired image, and j is more than or equal to 1 and less than or equal to the number of transverse points of the single-time acquired image;
with each point in the matrixes AR, AG and AB as a center, respectively searching a first brightness minimum value in four directions of up, down, left and right, and framing the range BR (i, j), BG (i, j) and BB (i, j) of each red sub-pixel according to the four minimum value coordinates;
reserving the brightness information of BR (2 i-1, 2j-1), BG (2 i-1, 2j-1) and BB (2 i-1, 2j-1), and replacing the brightness information of the rest positions with sr, sg and sb to obtain local information of the collected image at every 8 points;
performing surface fitting on the brightness and coordinate values in BR (2 i-1, 2j-1), BG (2 i-1, 2j-1) and BB (2 i-1, 2j-1), calculating the brightness values of pixels around BR (2 i-1, 2j-1), BG (2 i-1, 2j-1) and BB (2 i-1, 2j-1), and assigning the positions of which the brightness values are smaller than sr, sg and sb after fitting as sr, sg and sb, namely finishing simulating pictures collected at 8 points according to the pictures collected at 4 points;
recording the brightness peak value coordinates of each pixel after the curved surface is fitted and setting the coordinates as a matrix (CRx (i, j), CRy (i, j), CGx (i, j), CGy (i, j), CBx (i, j) and CBy (i, j));
setting the real pixel width of a single module of the LED display screen as 160, the height as 120, the total screen number as 9 rows and 12 columns of modules, substituting the above parameters into a formula, and obtaining correction coefficient matrixes Kfinal-R, kfinal G1 and Kfinal-B after seam repair
And loading the correction coefficient after the seam repair into a transmitter and sending the correction coefficient to an LED display screen terminal.
Fig. 7 is a schematic view of a display effect before seam repair, and fig. 8 is a schematic view of a display effect after seam repair, which shows that a splicing seam of the six-time virtual pixel display screen has obvious bright and dark lines before seam repair, and the bright and dark lines are eliminated after the seam repair method of the embodiment.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the present invention, and all such substitutions should be considered as belonging to the protection scope of the present invention.
Claims (7)
1. A method for correcting bright and dark lines of a virtual pixel display screen is characterized by comprising the following steps:
s1, respectively carrying out image acquisition on red, green and blue sub-pixel k-spacing points during red, green and blue monochromatic display, and respectively selecting a noise mean value for the acquired image edge;
s2, processing the images acquired at the interval points k to obtain images acquired by simulating the interval points 2 k;
s3, extracting coordinates of each sub-pixel brightness peak point in the image acquired by simulating every 2k points, and recording the coordinates as a matrix (CRx (i, j), CRy (i, j)), wherein i is more than or equal to 1 and less than or equal to the number of longitudinal points of the image acquired at one time, and j is more than or equal to 1 and less than or equal to the number of transverse points of the image acquired at one time;
s4, respectively calculating the longitudinal gap correction proportion K v And a transverse gap correction ratio K h ；
S5, correcting the longitudinal gap by a ratio K v And a transverse gap correction ratio K h Sequentially multiplying the correction coefficient matrix K to obtain the corrected coefficient matrix K after seam repair final ：
Wherein m represents the width of a real pixel in a single module of the display screen, n represents the height of the real pixel in the single module of the display screen, p represents the number of module columns of the whole screen, and q represents the number of module rows of the whole screen;
and S6, loading the correction coefficient matrix after seam repair into a transmitter, and sending the correction coefficient matrix to an LED display screen terminal to finish bright and dark line correction of the display screen.
2. The method for correcting bright and dark lines of a virtual pixel display screen according to claim 1, wherein the step S2 further comprises the steps of:
s21, reading an image collected at every k point, extracting a point coordinate with the highest brightness in each sub-pixel point, and recording the point coordinate as a matrix (ARx (i, j), ARy (i, j)), wherein the corresponding brightness value is AR (i, j);
s22, with each point in the matrix AR as a center, respectively searching a first brightness minimum value in four directions of up, down, left and right, and selecting a range BR (i, j) of each sub-pixel according to a coordinate frame of the four minimum values;
s23, reserving the brightness information of BR (2 i-1, 2j-1) positions, and replacing the brightness information of the rest positions with the noise mean value obtained in the step S1 to obtain local information of the collected images at intervals of 2 k;
and S24, performing surface fitting on the brightness and the coordinate value of the BR (2 i-1, 2j-1) position, calculating the brightness value of the pixel around the BR (2 i-1, 2j-1), and assigning the position with the brightness value smaller than the noise mean value after fitting as the noise mean value, namely finishing simulating the pictures collected at the interval 2k according to the pictures collected at the interval k.
3. The method for correcting bright and dark lines of a virtual pixel display screen according to claim 1, wherein the correction proportion K of the longitudinal slit in step S4 v The calculation method comprises the following steps:
(1) Calculating the difference D of the transverse coordinates of two rightmost columns of points of the left module in two transversely adjacent modules left ：
(2) Calculating the difference D between the horizontal coordinates of two leftmost columns of points of the right module in two transversely adjacent modules right ：
(3) Calculating the vertical standard spacing:
(4) Calculating the longitudinal nonstandard spacing:
(5) Calculating the correction proportion of the longitudinal gap:
4. the method according to claim 1, wherein the correction ratio K of the horizontal slit in step S4 is determined by the correction ratio of the horizontal slit h The calculation method comprises the following steps:
(1) Calculating the difference D between the longitudinal coordinates of two columns of the lowermost points of the upper module in two longitudinally adjacent modules up ：
(2) Calculating the difference D between the vertical coordinates of two columns of the uppermost points of the lower module in two longitudinally adjacent modules down ：
(3) Calculating the transverse standard spacing:
(4) Calculating the transverse nonstandard spacing:
(5) Calculating a transverse gap correction ratio:
5. a virtual pixel display screen bright and dark line correction system is characterized by being used for obtaining and realizing the virtual pixel display screen bright and dark line correction method according to any one of claims 1-4, and the system comprises an LED pixel brightness acquisition module, a pixel brightness value calculation module, a correction coefficient generation module, a gap correction proportion calculation module and a coefficient uploading module;
the LED pixel brightness acquisition module is used for acquiring a display screen pixel lamp image, the pixel brightness value calculation module is used for extracting and calculating the brightness value of each pixel according to the shot lamp image, the correction coefficient generation module is used for calculating point-by-point red, green and blue correction coefficients according to the extracted brightness value, the gap correction proportion calculation module is used for calculating a gap correction proportion and combining the gap correction proportion with the correction coefficient to realize compensation of bright and dark lines of a screen, and the coefficient uploading module is used for transmitting the corrected gap correction coefficient to a receiving card to realize bright and dark line correction of a display effect.
6. A virtual pixel display bright and dark line correction apparatus comprising the virtual pixel display bright and dark line correction system of claim 5.
7. A virtual pixel LED display system, comprising the virtual pixel display screen bright and dark line correction device as claimed in claim 6, further comprising a virtual pixel LED display screen and a receiving card;
the bright and dark line correction device of the virtual pixel display screen is used for issuing the corrected coefficients after seam repair to the receiving card, and the receiving card is used for carrying out differentiation control according to the corrected coefficients after seam repair so as to achieve bright and dark line correction display of the virtual pixel LED display screen.
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| CN115798402B (en) * | 2023-02-13 | 2023-06-16 | 长春希达电子技术有限公司 | Pixel multiplexing-based brightness compensation method |
| CN115831043B (en) * | 2023-02-14 | 2023-05-12 | 长春希达电子技术有限公司 | Device and method for correcting bright and dark lines of virtual pixel display screen |
| CN116935788B (en) * | 2023-09-15 | 2023-12-29 | 长春希达电子技术有限公司 | Color compensation method, storage medium and system based on pixel multiplexing |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332133A (en) * | 2014-05-07 | 2015-02-04 | 长春希达电子技术有限公司 | Splicing seam brightness compensation and adjustment method for high-density LED display screen |
| CN104916256A (en) * | 2015-06-25 | 2015-09-16 | 西安诺瓦电子科技有限公司 | Splicing bright-dark line correction method |
| CN104992670A (en) * | 2015-07-07 | 2015-10-21 | 西安诺瓦电子科技有限公司 | Splicing bright and dark line compensation method |
| CN104992669A (en) * | 2015-07-07 | 2015-10-21 | 西安诺瓦电子科技有限公司 | Splicing bright and dark line compensation method and device |
| CN107103874A (en) * | 2017-07-06 | 2017-08-29 | 苏州科达科技股份有限公司 | The spliced bright concealed wire bearing calibration of LED display and device |
| CN107256689A (en) * | 2016-11-09 | 2017-10-17 | 长春希达电子技术有限公司 | Uniformity restorative procedure after LED display gamma correction |
| CN110246425A (en) * | 2018-03-09 | 2019-09-17 | 深圳市奥拓电子股份有限公司 | Splice the adjusting method and LED mosaic display screen of bright concealed wire |
| CN110648626A (en) * | 2019-09-30 | 2020-01-03 | 深圳市奥拓电子股份有限公司 | Method and system for correcting bright and dark lines of LED display screen and storage medium thereof |
| CN114267267A (en) * | 2022-03-01 | 2022-04-01 | 卡莱特云科技股份有限公司 | Bright and dark seam repairing method, device and system for virtual pixel LED display screen |
| CN114675744A (en) * | 2022-05-27 | 2022-06-28 | 季华实验室 | AR (augmented reality) glasses visual brightness compensation method, electronic equipment and AR glasses |
| CN114974092A (en) * | 2022-06-02 | 2022-08-30 | 利亚德光电股份有限公司 | Method and device for processing spliced bright and dark lines and computer readable storage medium |
| CN114999372A (en) * | 2022-03-03 | 2022-09-02 | 长春希达电子技术有限公司 | Method for correcting bright and dark lines of LED display unit |
| CN115064117A (en) * | 2022-08-18 | 2022-09-16 | 长春希达电子技术有限公司 | Virtual pixel display screen brightness correction method, system and device and display system |
-
2022
- 2022-10-31 CN CN202211341235.8A patent/CN115482776B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332133A (en) * | 2014-05-07 | 2015-02-04 | 长春希达电子技术有限公司 | Splicing seam brightness compensation and adjustment method for high-density LED display screen |
| CN104916256A (en) * | 2015-06-25 | 2015-09-16 | 西安诺瓦电子科技有限公司 | Splicing bright-dark line correction method |
| CN104992670A (en) * | 2015-07-07 | 2015-10-21 | 西安诺瓦电子科技有限公司 | Splicing bright and dark line compensation method |
| CN104992669A (en) * | 2015-07-07 | 2015-10-21 | 西安诺瓦电子科技有限公司 | Splicing bright and dark line compensation method and device |
| CN107256689A (en) * | 2016-11-09 | 2017-10-17 | 长春希达电子技术有限公司 | Uniformity restorative procedure after LED display gamma correction |
| CN107103874A (en) * | 2017-07-06 | 2017-08-29 | 苏州科达科技股份有限公司 | The spliced bright concealed wire bearing calibration of LED display and device |
| CN110246425A (en) * | 2018-03-09 | 2019-09-17 | 深圳市奥拓电子股份有限公司 | Splice the adjusting method and LED mosaic display screen of bright concealed wire |
| CN110648626A (en) * | 2019-09-30 | 2020-01-03 | 深圳市奥拓电子股份有限公司 | Method and system for correcting bright and dark lines of LED display screen and storage medium thereof |
| CN114267267A (en) * | 2022-03-01 | 2022-04-01 | 卡莱特云科技股份有限公司 | Bright and dark seam repairing method, device and system for virtual pixel LED display screen |
| CN114999372A (en) * | 2022-03-03 | 2022-09-02 | 长春希达电子技术有限公司 | Method for correcting bright and dark lines of LED display unit |
| CN114675744A (en) * | 2022-05-27 | 2022-06-28 | 季华实验室 | AR (augmented reality) glasses visual brightness compensation method, electronic equipment and AR glasses |
| CN114974092A (en) * | 2022-06-02 | 2022-08-30 | 利亚德光电股份有限公司 | Method and device for processing spliced bright and dark lines and computer readable storage medium |
| CN115064117A (en) * | 2022-08-18 | 2022-09-16 | 长春希达电子技术有限公司 | Virtual pixel display screen brightness correction method, system and device and display system |
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