CN114283742B - Method and device for correcting brightness of display unit after replacement, electronic equipment and storage medium - Google Patents
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Abstract
The application belongs to the technical field of display screens, and discloses a method and a device for correcting brightness of a display unit after replacement, electronic equipment and a storage medium, wherein the brightness values of calibration blocks respectively positioned at the center, four corners and the middle point of four sides of a first display unit are obtained, and the brightness values of reference blocks respectively positioned at two ends and the middle point of one side, close to the first display unit, of a second display unit are obtained; dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to the vertexes of the four corners; calculating a brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area; the brightness correction value of each lamp point of the first display unit is sent to a control system of the LED display screen; therefore, the brightness of the replaced display unit can be effectively connected with the brightness of the adjacent unit quickly, and the correction efficiency and the correction effect are improved.
Description
Technical Field
The application relates to the technical field of display screens, in particular to a method and a device for correcting brightness of a display unit after replacement, electronic equipment and a storage medium.
Background
The LED display screen generally comprises a plurality of display units (usually a box), and when performing brightness correction, the LED display screen is generally integrally corrected, so that the brightness between two sides of a splicing seam of the display units is substantially the same. When a certain display unit in the LED display screen is damaged and replaced separately, the brightness of the replaced display unit is generally significantly inconsistent with the brightness of the adjacent display unit, and therefore, the replacement needs to be performed again.
Disclosure of Invention
The present application aims to provide a method and an apparatus for correcting brightness of a replaced display unit, an electronic device, and a storage medium, which can quickly and effectively link brightness of the replaced display unit with brightness of an adjacent unit, thereby improving correction efficiency and correction effect.
In a first aspect, the application provides a method for correcting brightness of a display unit after replacement, which is applied to a correction system of an LED display screen, wherein the LED display screen is formed by splicing a plurality of display units; the method comprises the following steps:
A1. acquiring brightness values of calibration blocks respectively positioned at the center, four corners and the middle point of four sides of a first display unit, and acquiring brightness values of reference blocks respectively positioned at two ends and the middle point of one side, close to the first display unit, of a second display unit; the first display unit is the replaced display unit, the second display unit is the display unit adjacent to the first display unit, and the calibration block and the reference block are both areas with preset sizes;
A2. dividing the first display unit into four triangular areas by using a connecting line from the center of the first display unit to four corner vertexes;
A3. calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area;
A4. and sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen.
The brightness correction method of the display unit after replacement adopts the brightness value of a reference block at the edge of the display unit adjacent to the display unit after replacement as a reference, and corrects the brightness of each lamp point in the display unit after replacement by adopting a linear interpolation method in a subarea manner, so that the brightness of the display unit gradually changes from inside to outside and is consistent with the brightness of the edge of the display unit around at the edge, and the brightness of the display unit after replacement is effectively linked with the brightness of the adjacent unit; compared with a manual adjusting mode, the correction efficiency is higher, and the correction effect is better.
In some embodiments, the luminance value of the calibration block is an average of luminance values of an inner region of the calibration block; the luminance value of the reference block is an average value of luminance of an inner area of the reference block.
In other embodiments, the luminance value of the calibration block is a luminance integrated value of an internal area of the calibration block; the luminance value of the reference block is a luminance integrated value of an inner area of the reference block.
Preferably, the luminance values include a red luminance value, a green luminance value, and a blue luminance value;
the step A3 comprises the following steps:
A301. calculating a red light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the red light brightness value of the calibration block at the edge of each triangular area and the red light brightness value of the reference block of the second display unit adjacent to the triangular area;
A302. calculating a green light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the green light brightness value of the calibration block at the edge of each triangular area and the green light brightness value of the reference block of the second display unit adjacent to the triangular area;
A303. and calculating the blue light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the blue light brightness value of the calibration block at the edge of each triangular area and the blue light brightness value of the reference block of the second display unit adjacent to the triangular area.
Preferably, step a301 includes:
acquiring a red light correction coefficient of each lamp point in the triangular area;
calculating the red light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The red light brightness correction value of the signal lamp point,
is the row number of the lamp point,
is the column number of the lamp point,
、
the red luminance values of the first calibration block and its left counterpart reference block,
、
the red luminance values of the second calibration block and its left counterpart reference block respectively,
、
red luminance values of the third calibration block and its left counterpart reference block,
、
the red luminance values of the fourth calibration block and its right counterpart reference block,
、
red luminance values of the fifth calibration block and its right counterpart reference block respectively,
、
red luminance values of the sixth calibration block and its right counterpart reference block respectively,
、
are respectively the seventhThe red brightness values of the calibration block and the reference block matched with the calibration block,
、
red brightness values of the eighth calibration block and the lower reference block,
the red luminance value of the block is scaled for the center,
for the red luminance value of the upper pair of reference blocks of the first calibration block,
for the red luminance value of the upper pair of reference blocks of said fourth calibration block,
for the red luminance value of the lower pair of reference blocks of the third calibration block,
for the red luminance value of the lower pair of reference blocks of the sixth calibration block,
is the total row number of the lamp points of the first display unit,
is half of the total number of the lamp points of the first display unit,
Is the total number of columns of light points of the first display unit,
half of the total number of columns of light points of the first display unit,
is as follows
The red light correction coefficient of the signal lamp point; the first calibration block, the second calibration block and the third calibration block are the calibration blocks at the upper part, the middle part and the lower part of the left side of the first display unit respectively; the fourth calibration block, the fifth calibration block and the sixth calibration block are the calibration blocks on the upper part, the middle part and the lower part of the right side of the first display unit respectively; the seventh calibration block is the calibration block in the middle of the upper side of the first display unit; the eighth calibration block is the calibration block in the middle of the lower side of the first display unit; the center calibration block is the calibration block in the center of the first display unit; the left counterpart reference block of a calibration block is the reference block located to the left of and closest to the calibration block; the right counterpart reference block of a calibration block is the reference block located to the right of and closest to the calibration block; the upper counterpart reference block of a calibration block is the reference block located above and closest to the calibration block; the lower pair of reference blocks of a calibration block is the reference block that is located below and closest to the calibration block.
By means of the method, the red light brightness of each lamp point is corrected, the red light of the corrected first display unit can be smoothly and gradually changed, and the phenomenon that the whole screen is uneven due to sudden change of the red light brightness between the adjusted first display unit and the surrounding display units is avoided.
Preferably, step a302 comprises:
acquiring a green light correction coefficient of each lamp point in the triangular area;
calculating the green light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular region of the left side, the right side, the upper side and the lower side
The green light brightness correction value of the signal lamp point,
、
green luminance values of the first calibration block and its left counterpart reference block respectively,
、
the green luminance values of the second calibration block and its left counterpart reference block respectively,
、
green luminance values of the third calibration block and its left counterpart reference block respectively,
、
green brightness values of the fourth calibration block and its right counterpart reference block respectively,
、
green luminance values of the fifth calibration block and its right counterpart reference block respectively,
、
green brightness values of the sixth calibration block and its right counterpart reference block respectively,
、
the brightness values of the green light of the seventh calibration block and the reference block matched with the seventh calibration block are respectively,
、
green brightness values of the eighth calibration block and its lower counterpart reference block respectively,
the green luminance value of the block is scaled for the center,
for the green luminance value of the upper pair of reference blocks of the first calibration block,
for the green luminance value of the upper pair of reference blocks of the fourth calibration block,
for the green luminance value of the lower pair of reference blocks of the third scaled block,
for the green luminance value of the lower pair of reference blocks of said sixth scaled block,
is a first
The green light correction factor for a light point.
By the method, the green light brightness of each lamp point is corrected, so that the green light of the corrected first display unit is smoothly and gradually changed, and the phenomenon of uneven whole screen caused by sudden change of the green light brightness between the adjusted first display unit and the surrounding display units is avoided.
Preferably, step a303 comprises:
obtaining blue light correction coefficients of all lamp points in the triangular area;
calculating the blue light brightness correction value of each lamp point in each triangular area through the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular region of the left side, the right side, the upper side and the lower side
The blue light brightness correction value of the signal lamp point,
、
the blue luminance values of the first calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the second calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the third calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the fourth calibration block and its right counterpart reference block respectively,
、
the blue luminance values of the fifth calibration block and the right counterpart reference block thereof,
、
the blue luminance values of the sixth calibration block and its right counterpart reference block,
、
the blue light brightness values of the seventh calibration block and the reference block paired with the seventh calibration block,
、
the blue light brightness values of the eighth calibration block and the lower counterpart reference block thereof respectively,
the blue luminance value of the block is calibrated for the center,
for the blue luminance value of the upper pair reference block of the first calibration block,
for the blue luminance value of the upper pair reference block of the fourth calibration block,
for the blue luminance value of the lower pair of reference blocks of said third calibration block,
for the blue luminance value of the lower pair of reference blocks of said sixth calibration block,
is as follows
The blue light correction factor of the signal lamp point.
By means of the method, the blue light brightness of each lamp point is corrected, the blue light of the corrected first display unit can be changed smoothly and gradually, and the phenomenon that the whole screen is uneven due to sudden change of the blue light brightness between the adjusted first display unit and the surrounding display units is avoided.
In a second aspect, the application provides a brightness correction device for a replaced display unit, which is applied to a correction system of an LED display screen, wherein the LED display screen is formed by splicing a plurality of display units; the method comprises the following steps:
the first acquisition module is used for acquiring the brightness values of the calibration blocks respectively positioned at the center, four corners and the middle point of four sides of the first display unit and acquiring the brightness values of the reference blocks respectively positioned at two ends and the middle point of one side, close to the first display unit, of the second display unit; the first display unit is the replaced display unit, the second display unit is the display unit adjacent to the first display unit, and the calibration block and the reference block are both areas with preset sizes;
the dividing module is used for dividing the first display unit into four triangular areas by using a connecting line from the center of the first display unit to the vertex of each corner;
the correction module is used for calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area;
and the sending module is used for sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen.
The brightness correction device of the display unit after replacement adopts the brightness value of a reference block at the edge of the display unit adjacent to the display unit after replacement as a reference, corrects the brightness of each lamp point in the display unit after replacement by adopting a linear interpolation method in a subarea manner, so that the brightness of the display unit gradually changes from inside to outside and is consistent with the brightness of the edge of the display unit around at the edge, and the brightness of the display unit after replacement is effectively linked with the brightness of the adjacent unit; compared with a manual adjusting mode, the correction efficiency is higher, and the correction effect is better.
In a third aspect, the present application provides an electronic device, which includes a processor and a memory, where the memory stores a computer program executable by the processor, and the processor executes the computer program to perform the steps in the method for correcting brightness of a display unit after conversion as described above.
In a fourth aspect, the present application provides a storage medium having a computer program stored thereon, where the computer program is executed by a processor to perform the steps of the method for modifying brightness of a display unit after conversion as described above.
Has the beneficial effects that:
according to the brightness correction method, the brightness correction device, the electronic equipment and the storage medium of the display unit after replacement, the brightness values of the calibration blocks respectively positioned at the center, the four corners and the middle points of the four sides of the first display unit are obtained, and the brightness values of the reference blocks respectively positioned at the two ends and the middle point of one side, close to the first display unit, of the second display unit are obtained; dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to four corner vertexes; calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area; sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen; therefore, the brightness of the replaced display unit can be effectively connected with the brightness of the adjacent unit quickly, and the correction efficiency and the correction effect are improved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application.
Drawings
Fig. 1 is a flowchart of a method for correcting brightness of a replaced display unit according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a brightness correction apparatus for a replaced display unit according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 4 is a schematic diagram of the distribution positions of exemplary first and second display units.
Fig. 5 is a schematic diagram of distribution positions of calibration blocks of the first display unit.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a diagram illustrating a brightness correction method for a display unit after replacement in some embodiments of the present application, which is applied to a correction system of an LED display screen, where the LED display screen is formed by splicing a plurality of display units; the method comprises the following steps:
A1. acquiring brightness values of calibration blocks respectively positioned at the center, four corners and the middle point of four sides of the first display unit, and acquiring brightness values of reference blocks respectively positioned at two ends and the middle point of one side of the second display unit close to the first display unit; the first display unit is a replaced display unit, the second display unit is a display unit adjacent to the first display unit, and the calibration block and the reference block are both areas with preset sizes;
A2. dividing the first display unit into four triangular regions by connecting lines (as dotted lines in fig. 5) from the center of the first display unit to the vertices of the four corners;
A3. calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area;
A4. and sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen.
The brightness correction method of the display unit after replacement adopts the brightness value of a reference block at the edge of the display unit adjacent to the display unit after replacement as a reference, and corrects the brightness of each lamp point in the display unit after replacement by adopting a linear interpolation method in a subarea manner, so that the brightness of the display unit gradually changes from inside to outside and is consistent with the brightness of the edge of the display unit around at the edge, and the brightness of the display unit after replacement is effectively linked with the brightness of the adjacent unit; compared with a manual adjusting mode, the correction efficiency is higher, and the correction effect is better.
The display unit of the LED display screen is generally box-shaped, the display area of each display unit is rectangular, and in the application, each of the four sides of each first display unit is provided with one second display unit. For example, in fig. 4, the first display unit 90 has one second display unit 91 at each of four sides.
The sizes and shapes of the calibration block and the reference block may be set according to actual needs, and generally, the calibration block and the reference block are squares, and the side length thereof may be a preset side length value or a product of the longest side of the first display unit and a preset ratio (for example, but not limited to, 10%). For example, in fig. 4, nine calibration blocks 92 of the first display unit 90 are respectively located at the center, four corners and the middle point of four sides of the first display unit 90; the reference blocks 93 of each second display unit 91 are three and are respectively located at two ends and a middle point of the edge close to one side of the first display unit 90, wherein the reference blocks 93 at the two ends are respectively aligned with the calibration blocks 92 at two corners of the first display unit 90, and the reference block 93 at the middle point is aligned with the calibration block 92 at the middle point of the corresponding edge of the first display unit 90.
In practical applications, the luminance measurement device may be used to measure the luminance of a neighboring region of the first display unit (e.g., a dashed-line frame region in fig. 4 that includes the entire display region of the first display unit and a partial region of each second display unit), and then extract the luminance values of each calibration block and each reference block from the neighboring region. Namely, step A1 includes: luminance data of an adjacent area of the first display unit acquired by the luminance measuring device is acquired, and luminance values of the respective calibration blocks and the respective reference blocks are extracted from the luminance data of the adjacent area.
The brightness measuring device may be a brightness meter, an industrial camera, a civil camera, a mobile phone, a pad, or other devices, and if the brightness meter is used for measurement, the brightness value (absolute brightness value) of each position in the adjacent area may be directly measured, and if the industrial camera, the civil camera, the mobile phone, the pad, or other devices are used for measurement, the image of the adjacent area is obtained first, the pixel value of each pixel point in the image is extracted, and the pixel value is used as the brightness value of the corresponding pixel point or converted into the brightness value (that is, converted into the absolute brightness value, and the conversion relationship may be measured in advance).
Preferably, in order to avoid that the lamp points at other positions influence the accuracy of the measured brightness values of the calibration block and each reference block, only the lamps at the calibration block and the reference block may be turned on and the lamp points at other positions may be turned off when the brightness is measured. Thus, the step of "acquiring the luminance data of the vicinity of the first display unit collected by the luminance measuring device" includes: the brightness data of the adjacent area of the first display unit collected by the brightness measuring device when the lamps of the calibration block and the reference block are turned on and the lamps at other positions are turned off is obtained.
For a color LED display screen, the brightness of light of three colors, red, green, and blue, of each light point needs to be corrected, so that red light brightness data, green light brightness data, and blue light brightness data of adjacent areas need to be obtained, and red light brightness values, green light brightness values, and blue light brightness values of a calibration block and each reference block need to be extracted; when measuring the brightness of red light, the lamp point needs to emit pure red light, when measuring the brightness of green light, the lamp point needs to emit pure green light, and when measuring the brightness of blue light, the lamp point needs to emit pure blue light.
Since the luminance value of each lamp may be different because the calibration block and the reference block include a plurality of lamps, it is necessary to calculate a reference value as the luminance value of the calibration block or the reference block by the luminance values at various places inside the calibration block or the reference block.
For example, in some embodiments, the reference value is an average luminance value, namely: the luminance value of the calibration block is the average value of the luminance of the internal region of the calibration block (the average value of the luminance values at the respective lamp points); the luminance value of the reference block is the average of the luminance of the inner area of the reference block.
Or, for example, in other embodiments, the luminance value of the calibration block is a luminance integrated value (sum of luminance values at the respective lamp points) of an internal area of the calibration block; the luminance value of the reference block is a luminance integrated value of an internal area of the reference block.
Referring to fig. 5, a distribution position diagram of the display area and the calibration block of the first display unit is shown, wherein the left side of the first display unit and two of the connecting lines (dashed lines in the figure) form a left triangular area, the right side and two of the connecting lines (dashed lines in the figure) form a right triangular area, the upper side and two of the connecting lines (dashed lines in the figure) form an upper triangular area, and the lower side and two of the connecting lines (dashed lines in the figure) form a lower triangular area. Hereinafter, the up, down, left and right directions are based on the directions in fig. 5.
In this embodiment, the LED display screen is a color LED display screen, and the brightness values include a red brightness value, a green brightness value and a blue brightness value;
thus, step A3 comprises:
A301. calculating red light brightness correction values of all lamp points in the triangular area by adopting a linear interpolation method according to the red light brightness value of the calibration block at the edge of each triangular area and the red light brightness value of the reference block of the second display unit adjacent to the triangular area;
A302. calculating a green light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the green light brightness value of the calibration block at the edge of each triangular area and the green light brightness value of the reference block of the second display unit adjacent to the triangular area;
A303. and calculating the blue light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the blue light brightness value of the calibration block at the edge of each triangular area and the blue light brightness value of the reference block of the second display unit adjacent to the triangular area.
The calibration blocks at the edge of the triangular region comprise three calibration blocks positioned at the bottom edge of the triangular region (namely three calibration blocks at the corresponding side edge of the first display unit) and a calibration block positioned at the top corner of the triangular region (namely a calibration block at the center of the first display unit).
Specifically, step a301 includes:
acquiring red light correction coefficients of each lamp point in the triangular area (in practical application, if a display module is not corrected after leaving a factory, the red light correction coefficients of each lamp point are factory values, the red light correction coefficients are stored in a driver of the display module, and the red light correction coefficients are updated after each correction, so that the red light correction coefficients can be directly read from the driver of the display module);
calculating the red light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
in triangular regions of left, right, upper and lower sides of the first display unit
The red light brightness correction value of the signal lamp point,
is the line number of the lamp point,
is the column number of the lamp point,
、
the red brightness values of the first calibration block and the left reference block pair,
、
the red brightness values of the second calibration block and its left counterpart reference block,
、
red luminance values of the third calibration block and its left counterpart reference block,
、
respectively being a fourth calibration block andthe red luminance value of the right pair of reference blocks,
、
red luminance values of the fifth calibration block and its right counterpart reference block respectively,
、
red luminance values of the sixth calibration block and its right counterpart reference block respectively,
、
the red brightness values of the seventh calibration block and the reference block matched with the seventh calibration block,
、
the red brightness values of the eighth calibration block and the reference block below the eighth calibration block,
the red luminance value of the block is scaled for the center,
for the red luminance value of the upper pair of reference blocks of the first calibration block,
for the red luminance value of the upper pair of reference blocks of the fourth calibration block,
for the red luminance value of the lower pair of reference blocks of the third calibration block,
for the red luminance value of the lower pair of reference blocks of the sixth calibration block,
is the total number of rows of light points of the first display unit,
is half of the total number of rows of the lamp points of the first display unit (if
Is an even number, then
Is equal to
A half of if
Is odd, then
Is equal to
An integer part of one half of),
Is the total number of columns of light points of the first display unit,
half of the total number of rows of light points of the first display unit (if
Is an even number and is provided with a plurality of groups,then
Is equal to
A half of if
Is an odd number, then
Is equal to
An integer portion of one-half),
is as follows
Red light correction coefficients of the signal lamp points; the first calibration block, the second calibration block and the third calibration block are respectively calibration blocks at the upper part, the middle part and the lower part of the left side of the first display unit; the fourth calibration block, the fifth calibration block and the sixth calibration block are respectively calibration blocks on the upper part, the middle part and the lower part of the right side of the first display unit; the seventh calibration block is a calibration block in the middle of the upper side of the first display unit; the eighth calibration block is a calibration block at the middle of the lower side of the first display unit; the center calibration block is a calibration block at the center of the first display unit; the left paired reference block of the calibration block is the reference block located on the left side of the calibration block and closest to the calibration block; the right paired reference block of the calibration block is the reference block located on the right side of the calibration block and closest to the calibration block; the upper pairing reference block of the calibration block is a reference block which is positioned at the upper side of the calibration block and is closest to the calibration block; the lower pair of reference blocks of the calibration block is the reference block located at the lower side of the calibration block and closest to the calibration block.
By means of the method, the red light brightness of each lamp point is corrected, the red light of the corrected first display unit can be smoothly and gradually changed, and the phenomenon that the whole screen is uneven due to sudden change of the red light brightness between the adjusted first display unit and the surrounding display units is avoided.
Referring to fig. 5, the first calibration block is calibration block No. 1 in the drawing, the second calibration block is calibration block No. 2 in the drawing, the third calibration block is calibration block No. 3 in the drawing, the fourth calibration block is calibration block No. 4 in the drawing, the fifth calibration block is calibration block No. 5 in the drawing, the sixth calibration block is calibration block No. 6 in the drawing, the seventh calibration block is calibration block No. 7 in the drawing, the eighth calibration block is calibration block No. 8 in the drawing, and the center calibration block is calibration block No. t in the drawing.
Referring to fig. 4, a calibration block and a reference block located in the same dashed area of an ellipse are paired, and when the paired reference block is located on the upper side of the calibration block, the reference block is the upper paired reference block of the calibration block, when the paired reference block is located on the lower side of the calibration block, the reference block is the lower paired reference block of the calibration block, when the paired reference block is located on the left side of the calibration block, the reference block is the left paired reference block of the calibration block, and when the paired reference block is located on the right side of the calibration block, the reference block is the right paired reference block of the calibration block.
In this application, the lamp point at the upper left corner of the first display unit is defined as (1,1), the row number of the lamp point gradually increases from top to bottom, and the column number of the lamp point gradually increases from left to right, so that the lamp point at the lower right corner of the first display unit is defined as (m 2, n 2) lamp point.
Specifically, step a302 includes:
acquiring a green light correction coefficient of each lamp point in the triangular area (in practical application, if a display module is not corrected after leaving a factory, the green light correction coefficient of each lamp point is a factory value, the green light correction coefficient is stored in a driver of the display module, and the green light correction coefficient is updated after each correction, so that the green light correction coefficient can be directly read from the driver of the display module);
calculating the green light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The green light brightness correction value of the signal lamp point,
、
the green luminance values of the first calibration block and its left counterpart reference block respectively,
、
respectively a second calibration block and a left pairing reference block thereofThe brightness value of the green light of (a),
、
green luminance values of the third calibration block and its left counterpart reference block,
、
green brightness values of the fourth calibration block and its right counterpart reference block respectively,
、
green luminance values of the fifth calibration block and its right counterpart reference block,
、
green brightness values of the sixth calibration block and its right counterpart reference block respectively,
、
the green brightness values of the seventh calibration block and the reference block paired with the seventh calibration block,
、
green luminance values of the eighth calibration block and the reference block below the eighth calibration block,
the green luminance value of the block is scaled for the center,
for the green luminance value of the upper pair of reference blocks of the first scaled block,
for the green luminance value of the upper pair of reference blocks of the fourth scaled block,
for the green luminance value of the lower pair of reference blocks of the third scaled block,
for the green luminance value of the lower pair of reference blocks of the sixth scaled block,
is as follows
Green light correction factor of the signal lamp point.
By the method, the green light brightness of each lamp point is corrected, so that the green light of the corrected first display unit is smoothly and gradually changed, and the phenomenon of uneven whole screen caused by sudden change of the green light brightness between the adjusted first display unit and the surrounding display units is avoided.
Preferably, step a303 comprises:
obtaining blue light correction coefficients of each lamp point in the triangular area (in practical application, if a display module is not corrected after leaving a factory, the blue light correction coefficients of each lamp point are factory values, the blue light correction coefficients are stored in a driver of the display module, and the blue light correction coefficients are updated after each correction, so that the blue light correction coefficients can be directly read from the driver of the display module);
calculating the blue light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The blue light brightness correction value of the signal lamp point,
、
the blue luminance values of the first calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the second calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the third calibration block and its left counterpart reference block,
、
the blue luminance values of the fourth calibration block and its right counterpart reference block respectively,
、
the blue luminance values of the fifth calibration block and the right counterpart reference block thereof,
、
the blue luminance values of the sixth calibration block and its right counterpart reference block,
、
the blue light brightness values of the seventh calibration block and the reference block matched with the seventh calibration block,
、
the blue light brightness values of the eighth calibration block and the lower matched reference block respectively,
the blue luminance value of the block is calibrated for the center,
for the blue luminance value of the upper pair reference block of the first calibration block,
for the blue luminance value of the upper pair reference block of the fourth calibration block,
for the blue luminance value of the lower pair of reference blocks of the third calibration block,
for the blue luminance value of the lower pair of reference blocks of the sixth calibration block,
is as follows
Blue light correction factor of the signal lamp point.
By means of the method, the blue light brightness of each lamp point is corrected, the blue light of the corrected first display unit can be changed smoothly and gradually, and the phenomenon that the whole screen is uneven due to sudden change of the blue light brightness between the adjusted first display unit and the surrounding display units is avoided.
In practical application, after the brightness correction value of each lamp point of the first display unit is sent to the control system of the LED display screen, the control system of the LED display screen can control each lamp point to emit light according to the corresponding brightness correction value, so that the brightness consistency of the LED display screen is improved, and the watching comfort level of human eyes is improved.
In view of the above, the brightness correction method for the display unit after replacement obtains the brightness values of the calibration blocks respectively located at the center, four corners and the middle point of the four sides of the first display unit, and obtains the brightness values of the reference blocks respectively located at the two ends and the middle point of the second display unit near the first display unit; dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to the vertexes of the four corners; calculating a brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area; sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen; therefore, the brightness of the replaced display unit can be effectively connected with the brightness of the adjacent unit quickly, and the correction efficiency and the correction effect are improved.
Referring to fig. 2, the present application provides a brightness correction device for a replaced display unit, which is applied to a correction system of an LED display screen, wherein the LED display screen is formed by splicing a plurality of display units; the method comprises the following steps:
a first obtaining module 101, configured to obtain luminance values of the calibration blocks located at the center, four corners, and the middle point of four sides of the first display unit, respectively, and obtain luminance values of the reference blocks located at two ends and the middle point of one side of the second display unit close to the first display unit, respectively; the first display unit is a replaced display unit, the second display unit is a display unit adjacent to the first display unit, and the calibration block and the reference block are both areas with preset sizes;
the dividing module 102 is configured to divide the first display unit into four triangular regions by using a connecting line from the center of the first display unit to the vertices of the four corners;
the correction module 103 is used for calculating a brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area;
and the sending module 104 is used for sending the brightness correction value of each lamp point of the first display unit to the control system of the LED display screen.
The brightness correction device of the display unit after replacement adopts the brightness value of a reference block at the edge of the display unit adjacent to the display unit after replacement as a reference, corrects the brightness of each lamp point in the display unit after replacement by adopting a linear interpolation method in a subarea manner, so that the brightness of the display unit gradually changes from inside to outside and is consistent with the brightness of the edge of the display unit around at the edge, and the brightness of the display unit after replacement is effectively linked with the brightness of the adjacent unit; compared with a manual adjusting mode, the correction efficiency is higher, and the correction effect is better.
The display unit of the LED display screen is generally box-shaped, the display area of each display unit is rectangular, and in the application, the four sides of each first display unit are respectively provided with a second display unit. For example, in fig. 4, the first display unit 90 has one second display unit 91 at each of four sides.
The size and shape of the calibration block and the reference block may be set according to actual needs, and generally, the calibration block and the reference block are squares, and the side length thereof may be a preset side length value or a product of the longest side of the first display unit and a preset ratio (for example, 10%, but not limited thereto). For example, in fig. 4, nine calibration blocks 92 of the first display unit 90 are respectively located at the center, four corners and the middle point of four sides of the first display unit 90; the reference blocks 93 of each second display unit 91 are three and are respectively located at two ends and a middle point of the edge close to one side of the first display unit 90, wherein the reference blocks 93 at the two ends are respectively aligned with the calibration blocks 92 at two corners of the first display unit 90, and the reference block 93 at the middle point is aligned with the calibration block 92 at the middle point of the corresponding edge of the first display unit 90.
In practical applications, the luminance measurement device may be used to measure the luminance of a neighboring region of the first display unit (e.g., a dashed-line frame region in fig. 4, which includes the entire display region of the first display unit and a partial region of each second display unit), and then extract the luminance values of each calibration block and each reference block from the neighboring region. That is, the first obtaining module 101 is configured to, when obtaining luminance values of the calibration blocks respectively located at the center, four corners, and the middle point of the four sides of the first display unit, and obtaining luminance values of the reference blocks respectively located at both ends and the middle point of the second display unit on the side close to the first display unit, perform: luminance data of an adjacent area of the first display unit acquired by the luminance measuring device is acquired, and luminance values of the respective calibration blocks and the respective reference blocks are extracted from the luminance data of the adjacent area.
The brightness measuring device may be a brightness meter, an industrial camera, a civil camera, a mobile phone, a pad, or other devices, and if the brightness meter is used for measurement, the brightness value (absolute brightness value) of each position in the adjacent area may be directly measured, and if the industrial camera, the civil camera, the mobile phone, the pad, or other devices are used for measurement, the image of the adjacent area is obtained first, the pixel value of each pixel point in the image is extracted, and the pixel value is used as the brightness value of the corresponding pixel point or converted into the brightness value (that is, converted into the absolute brightness value, and the conversion relationship may be measured in advance).
Preferably, in order to avoid that the lamp points at other positions influence the accuracy of the measured brightness values of the calibration block and the reference blocks, only the lamps at the calibration block and the reference blocks can be turned on and the lamp points at other positions are turned off when the brightness is measured. Thus, the first acquisition module 101, when acquiring the luminance data of the vicinity of the first display unit acquired by the luminance measurement device, performs: acquiring brightness data of an adjacent area of the first display unit, which is acquired by a brightness measuring device when lamps of the calibration block and the reference block are turned on and lamps at other positions are turned off.
For a color LED display screen, the brightness of light of three colors, red, green, and blue, of each light point needs to be corrected, so that red light brightness data, green light brightness data, and blue light brightness data of adjacent areas need to be obtained, and red light brightness values, green light brightness values, and blue light brightness values of a calibration block and each reference block need to be extracted; when measuring the brightness of red light, the lamp point needs to emit pure red light, when measuring the brightness of green light, the lamp point needs to emit pure green light, and when measuring the brightness of blue light, the lamp point needs to emit pure blue light.
Since the luminance value of each lamp may be different because the calibration block and the reference block include a plurality of lamps, it is necessary to calculate a reference value as the luminance value of the calibration block or the reference block by the luminance values at various places inside the calibration block or the reference block.
For example, in some embodiments, the reference value is an average luminance value, namely: the luminance value of the calibration block is the average value of the luminance of the internal region of the calibration block (the average value of the luminance values at the respective lamp points); the luminance value of the reference block is the average value of the luminance of the inner area of the reference block.
Or, for example, in other embodiments, the luminance value of the calibration block is a luminance integrated value (sum of luminance values at the respective lamp points) of an internal area of the calibration block; the luminance value of the reference block is a luminance integrated value of an internal area of the reference block.
Referring to fig. 5, a distribution position diagram of the display area and the calibration block of the first display unit is shown, wherein the left side of the first display unit and two of the connecting lines (dashed lines in the figure) form a left triangular area, the right side and two of the connecting lines (dashed lines in the figure) form a right triangular area, the upper side and two of the connecting lines (dashed lines in the figure) form an upper triangular area, and the lower side and two of the connecting lines (dashed lines in the figure) form a lower triangular area. Hereinafter, the up, down, left and right directions are based on the directions in fig. 5.
In this embodiment, the LED display screen is a color LED display screen, and the brightness values include a red brightness value, a green brightness value, and a blue brightness value;
thus, the correction module 103 is configured to perform, when calculating the brightness correction value of each light point in the triangular region by using the linear interpolation method according to the brightness value of the calibration block at the edge of each triangular region and the brightness value of the reference block of the second display unit adjacent to the triangular region:
calculating red light brightness correction values of all lamp points in the triangular area by adopting a linear interpolation method according to the red light brightness value of the calibration block at the edge of each triangular area and the red light brightness value of the reference block of the second display unit adjacent to the triangular area;
calculating a green light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the green light brightness value of the calibration block at the edge of each triangular area and the green light brightness value of the reference block of the second display unit adjacent to the triangular area;
and calculating the blue light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the blue light brightness value of the calibration block at the edge of each triangular area and the blue light brightness value of the reference block of the second display unit adjacent to the triangular area.
The calibration blocks at the edge of the triangular region comprise three calibration blocks at the bottom edge of the triangular region (namely three calibration blocks at the corresponding side edge of the first display unit) and a calibration block at the top corner of the triangular region (namely a calibration block at the center of the first display unit).
Specifically, when the correction module 103 calculates the red light brightness correction value of each light point in the triangular region by using a linear interpolation method according to the red light brightness value of the calibration block at the edge of each triangular region and the red light brightness value of the reference block of the second display unit adjacent to the triangular region, the following steps are performed:
acquiring red light correction coefficients of each lamp point in the triangular area (in practical application, if a display module is not corrected after leaving a factory, the red light correction coefficients of each lamp point are factory values, the red light correction coefficients are stored in a driver of the display module, and the red light correction coefficients are updated after each correction, so that the red light correction coefficients can be directly read from the driver of the display module);
calculating the red light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The red light brightness correction value of the signal lamp point,
is the line number of the lamp point,
is the column number of the lamp point,
、
the red luminance values of the first calibration block and its left counterpart reference block,
、
the red luminance values of the second calibration block and its left counterpart reference block respectively,
、
red luminance values of the third calibration block and its left counterpart reference block,
、
the red luminance values of the fourth calibration block and its right counterpart reference block,
、
red luminance values of the fifth calibration block and its right counterpart reference block respectively,
、
red luminance values of the sixth calibration block and its right counterpart reference block respectively,
、
the red brightness values of the seventh calibration block and the reference block matched with the seventh calibration block,
、
the red brightness values of the eighth calibration block and the reference block below the eighth calibration block,
the red luminance value of the block is scaled for the center,
for the red luminance value of the upper pair of reference blocks of the first calibration block,
for the red luminance value of the upper pair of reference blocks of the fourth calibration block,
for the red luminance value of the lower pair of reference blocks of the third calibration block,
for the red luminance value of the lower pair of reference blocks of the sixth calibration block,
is the total number of rows of light points of the first display unit,
is half of the total number of rows of the lamp points of the first display unit (if
Is an even number, then
Is equal to
A half of if
Is an odd number, then
Is equal to
An integer part of one half) of,
Is the total number of columns of light points of the first display unit,
half of the total number of rows of light points of the first display unit (if
Is an even number, then
Is equal to
A half of if
Is odd, then
Is equal to
An integer portion of one-half),
is as follows
Red light correction coefficient of the signal lamp point; the first calibration block, the second calibration block and the third calibration block are respectively the upper part, the middle part and the lower part of the left side of the first display unit; the fourth calibration block, the fifth calibration block and the sixth calibration block are respectively calibration blocks on the upper part, the middle part and the lower part of the right side of the first display unit; the seventh calibration block is a calibration block in the middle of the upper side of the first display unit; the eighth calibration block is a calibration block at the middle part of the lower side of the first display unit; the central calibration block isA calibration block in the center of the first display unit; the left paired reference block of the calibration block is the reference block located on the left side of the calibration block and closest to the calibration block; the right paired reference block of the calibration block is the reference block located on the right side of the calibration block and closest to the calibration block; the upper pairing reference block of the calibration block is a reference block which is positioned at the upper side of the calibration block and is closest to the calibration block; the lower pair of reference blocks of the calibration block is the reference block located at the lower side of the calibration block and closest to the calibration block.
By means of the method, the red light brightness of each lamp point is corrected, the red light of the corrected first display unit can be smoothly and gradually changed, and the phenomenon that the whole screen is uneven due to sudden change of the red light brightness between the adjusted first display unit and the surrounding display units is avoided.
Referring to fig. 5, the first calibration block is the calibration block No. 1 in the drawing, the second calibration block is the calibration block No. 2 in the drawing, the third calibration block is the calibration block No. 3 in the drawing, the fourth calibration block is the calibration block No. 4 in the drawing, the fifth calibration block is the calibration block No. 5 in the drawing, the sixth calibration block is the calibration block No. 6 in the drawing, the seventh calibration block is the calibration block No. 7 in the drawing, the eighth calibration block is the calibration block No. 8 in the drawing, and the central calibration block is the calibration block No. t in the drawing.
Referring to fig. 4, a calibration block and a reference block located in the same dashed area of an ellipse are paired, and when the paired reference block is located on the upper side of the calibration block, the reference block is the upper paired reference block of the calibration block, when the paired reference block is located on the lower side of the calibration block, the reference block is the lower paired reference block of the calibration block, when the paired reference block is located on the left side of the calibration block, the reference block is the left paired reference block of the calibration block, and when the paired reference block is located on the right side of the calibration block, the reference block is the right paired reference block of the calibration block.
In this application, the lamp point at the upper left corner of the first display unit is defined as (1,1), the row number of the lamp point gradually increases from top to bottom, and the column number of the lamp point gradually increases from left to right, so that the lamp point at the lower right corner of the first display unit is defined as (m 2, n 2) lamp point.
Specifically, the correction module 103 performs, when calculating the green brightness correction value of each light point in the triangular region by using a linear interpolation method according to the green brightness value of the calibration block at the edge of each triangular region and the green brightness value of the reference block of the second display unit adjacent to the triangular region:
acquiring a green light correction coefficient of each lamp point in the triangular area (in practical application, if a display module is not corrected after leaving a factory, the green light correction coefficient of each lamp point is a factory value, the green light correction coefficient is stored in a driver of the display module, and the green light correction coefficient is updated after each correction, so that the green light correction coefficient can be directly read from the driver of the display module);
and calculating the corrected green light brightness value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The green light brightness correction value of the signal lamp point,
、
the green luminance values of the first calibration block and its left counterpart reference block respectively,
、
green luminance values of the second calibration block and its left counterpart reference block respectively,
、
green luminance values of the third calibration block and its left counterpart reference block,
、
green brightness values of the fourth calibration block and its right counterpart reference block respectively,
、
green brightness values of the fifth calibration block and its right counterpart reference block respectively,
、
green brightness values of the sixth calibration block and its right counterpart reference block respectively,
、
the green brightness values of the seventh calibration block and the reference block paired with the seventh calibration block,
、
green brightness values of the eighth calibration block and the reference block below the eighth calibration block respectively,
the green luminance value of the block is scaled for the center,
for the green luminance value of the upper pair of reference blocks of the first calibration block,
for the green luminance value of the upper pair of reference blocks of the fourth scaled block,
for the green luminance value of the lower pair of reference blocks of the third scaled block,
for the green luminance value of the lower pair of reference blocks of the sixth scaled block,
is as follows
For lighting a lampAnd green light correction coefficients.
By the method, the green light brightness of each lamp point is corrected, so that the green light of the corrected first display unit is smoothly and gradually changed, and the phenomenon of uneven whole screen caused by sudden change of the green light brightness between the adjusted first display unit and the surrounding display units is avoided.
Preferably, the correction module 103 performs, when calculating the blue light brightness correction value of each light point in the triangular region by using a linear interpolation method according to the blue light brightness value of the calibration block at the edge of each triangular region and the blue light brightness value of the reference block of the second display unit adjacent to the triangular region:
acquiring blue light correction coefficients of each lamp point in the triangular area (in practical application, if a display module is not corrected after leaving a factory, the blue light correction coefficients of each lamp point are factory values, the blue light correction coefficients are stored in a driver of the display module, and the blue light correction coefficients are updated after each correction, so that the blue light correction coefficients can be directly read from the driver of the display module);
calculating the blue light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
in triangular regions of left, right, upper and lower sides of the first display unit
The blue light brightness correction value of the signal lamp point,
、
the blue luminance values of the first calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the second calibration block and its left counterpart reference block,
、
the blue luminance values of the third calibration block and its left counterpart reference block,
、
the blue luminance values of the fourth calibration block and its right counterpart reference block,
、
the blue luminance values of the fifth calibration block and the right counterpart reference block thereof,
、
the blue luminance values of the sixth calibration block and its right counterpart reference block,
、
the blue light brightness values of the seventh calibration block and the reference block matched with the seventh calibration block,
、
the blue light brightness values of the eighth calibration block and the reference block below the eighth calibration block,
the blue luminance value of the block is calibrated for the center,
for the blue luminance value of the upper pair of reference blocks of the first calibration block,
for the blue luminance value of the upper pair reference block of the fourth calibration block,
for the blue luminance value of the lower pair of reference blocks of the third calibration block,
for the blue luminance value of the lower pair of reference blocks of the sixth calibration block,
is as follows
Blue light correction factor of the signal lamp point.
By means of the method, the blue light brightness of each lamp point is corrected, the blue light of the corrected first display unit can be changed smoothly and gradually, and the phenomenon that the whole screen is uneven due to sudden change of the blue light brightness between the adjusted first display unit and the surrounding display units is avoided.
In practical application, after the sending module 104 sends the brightness correction value of each lamp of the first display unit to the control system of the LED display screen, the control system of the LED display screen controls each lamp to emit light according to the corresponding brightness correction value, so as to improve the brightness consistency of the LED display screen and improve the viewing comfort of human eyes.
As can be seen from the above, the luminance correction apparatus for display unit after replacement obtains the luminance values of the calibration blocks respectively located at the center, four corners, and the middle points of the four sides of the first display unit, and obtains the luminance values of the reference blocks respectively located at the two ends and the middle point of the second display unit near the first display unit; dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to the vertexes of the four corners; calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area; the brightness correction value of each lamp point of the first display unit is sent to a control system of the LED display screen; therefore, the brightness of the replaced display unit can be effectively connected with the brightness of the adjacent unit quickly, and the correction efficiency and the correction effect are improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure, where the present disclosure provides an electronic device, including: the processor 301 and the memory 302, the processor 301 and the memory 302 are interconnected and communicate with each other through the communication bus 303 and/or other types of connection mechanisms (not shown), the memory 302 stores a computer program executable by the processor 301, and when the electronic device runs, the processor 301 executes the computer program to execute the method for modifying the brightness of the display unit after replacement in any optional implementation manner of the above embodiments, so as to implement the following functions: acquiring brightness values of calibration blocks respectively positioned at the center, four corners and the middle point of four sides of the first display unit, and acquiring brightness values of reference blocks respectively positioned at two ends and the middle point of one side, close to the first display unit, of the second display unit; dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to the vertexes of the four corners; calculating a brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area; and sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen.
The embodiment of the present application provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for correcting brightness of a display unit after replacement in any optional implementation manner of the foregoing embodiment is executed, so as to implement the following functions: acquiring brightness values of calibration blocks respectively positioned at the center, four corners and the middle point of four sides of the first display unit, and acquiring brightness values of reference blocks respectively positioned at two ends and the middle point of one side of the second display unit close to the first display unit; dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to the vertexes of the four corners; calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area; and sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen. The storage medium may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), a Read-Only Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some communication interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A brightness correction method of a display unit after replacement is applied to a correction system of an LED display screen, wherein the LED display screen is formed by splicing a plurality of display units; it is characterized by comprising the following steps:
A1. acquiring brightness values of calibration blocks respectively positioned at the center, four corners and the middle point of four sides of a first display unit, and acquiring brightness values of reference blocks respectively positioned at two ends and the middle point of one side, close to the first display unit, of a second display unit; the first display unit is the replaced display unit, the second display unit is the display unit adjacent to the first display unit, and the calibration block and the reference block are both areas with preset sizes;
A2. dividing the first display unit into four triangular areas by connecting lines from the center of the first display unit to four corner vertexes;
A3. calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area;
A4. and sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen.
2. The method according to claim 1, wherein the luminance value of the calibration block is an average value of luminance of an inner area of the calibration block; the luminance value of the reference block is an average value of luminance of an inner area of the reference block.
3. The method for correcting luminance of a display unit after replacement according to claim 1, wherein the luminance value of the calibration block is a luminance integrated value of an internal area of the calibration block; the luminance value of the reference block is a luminance integrated value of an inner area of the reference block.
4. The brightness correction method for display unit after replacement according to claim 1, wherein the brightness values comprise a red brightness value, a green brightness value and a blue brightness value;
the step A3 comprises the following steps:
A301. calculating a red light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the red light brightness value of the calibration block at the edge of each triangular area and the red light brightness value of the reference block of the second display unit adjacent to the triangular area;
A302. calculating a green light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the green light brightness value of the calibration block at the edge of each triangular area and the green light brightness value of the reference block of the second display unit adjacent to the triangular area;
A303. and calculating the blue light brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the blue light brightness value of the calibration block at the edge of each triangular area and the blue light brightness value of the reference block of the second display unit adjacent to the triangular area.
5. The brightness correction method for display unit after replacement according to claim 4, wherein step A301 comprises:
acquiring a red light correction coefficient of each lamp point in the triangular area;
calculating the red light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The red light brightness correction value of the signal lamp point,
is the row number of the lamp point,
is the column number of the lamp point,
、
respectively of a first calibration block and its left counterpart reference blockThe brightness value of the red light is,
、
the red luminance values of the second calibration block and its left counterpart reference block respectively,
、
red luminance values of the third calibration block and its left counterpart reference block,
、
the red luminance values of the fourth calibration block and its right counterpart reference block,
、
red luminance values of the fifth calibration block and its right counterpart reference block respectively,
、
red luminance values of the sixth calibration block and its right counterpart reference block respectively,
、
the red brightness values of the seventh calibration block and the reference block matched with the seventh calibration block,
、
the red brightness values of the eighth calibration block and the reference block below the eighth calibration block,
the red luminance value of the block is scaled for the center,
for the red luminance value of the upper pair of reference blocks of the first calibration block,
for the red luminance value of the upper pair of reference blocks of said fourth calibration block,
for the red luminance value of the lower pair of reference blocks of said third calibration block,
for the red luminance value of the lower pair of reference blocks of the sixth calibration block,
is the total row number of the lamp points of the first display unit,
is half of the total number of the lamp points of the first display unit,
Is the total number of columns of light points of the first display unit,
half of the total number of columns of light points of the first display unit,
is as follows
The red light correction coefficient of the signal lamp point; the first calibration block, the second calibration block and the third calibration block are the calibration blocks at the upper part, the middle part and the lower part of the left side of the first display unit respectively; the fourth calibration block, the fifth calibration block and the sixth calibration block are the calibration blocks on the upper part, the middle part and the lower part of the right side of the first display unit respectively; the seventh calibration block is the calibration block in the middle of the upper side of the first display unit; the eighth calibration block is the calibration block at the middle of the lower side of the first display unit; the center calibration block is the calibration block in the center of the first display unit; the left counterpart reference block of a calibration block is the reference block located to the left of and closest to the calibration block; the right counterpart reference block of a calibration block is the reference block located to the right of and closest to the calibration block; the upper counterpart reference block of a calibration block is the reference block located at the upper side of the calibration block and closest to the calibration block; the lower pair of reference blocks of a calibration block is the reference block that is located below and closest to the calibration block.
6. The brightness correction method for display unit after replacement according to claim 5, wherein step A302 comprises:
acquiring a green light correction coefficient of each lamp point in the triangular area;
calculating the green light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The green light brightness correction value of the signal lamp point,
、
green luminance values of the first calibration block and its left counterpart reference block respectively,
、
green luminance values of the second calibration block and its left counterpart reference block respectively,
、
green luminance values of the third calibration block and its left counterpart reference block respectively,
、
green brightness values of the fourth calibration block and its right counterpart reference block respectively,
、
green luminance values of the fifth calibration block and its right counterpart reference block respectively,
、
green brightness values of the sixth calibration block and its right counterpart reference block respectively,
、
the brightness values of the green light of the seventh calibration block and the reference block matched with the seventh calibration block are respectively,
、
green luminance values of the eighth calibration block and its lower counterpart reference block respectively,
the green luminance value of the block is scaled for the center,
for the green luminance value of the upper pair of reference blocks of the first calibration block,
for the green luminance value of the upper pair of reference blocks of the fourth calibration block,
for the green luminance value of the lower pair of reference blocks of the third scaled block,
for the green luminance value of the lower pair of reference blocks of said sixth scaled block,
is as follows
The green light correction factor for a light point.
7. The method for correcting brightness of a display unit after replacement according to claim 6, wherein step A303 comprises:
obtaining blue light correction coefficients of all lamp points in the triangular area;
calculating the blue light brightness correction value of each lamp point in each triangular area by the following formula:
wherein,
、
、
、
the first display unit is arranged in the triangular regions of the left side, the right side, the upper side and the lower side
The blue light brightness correction value of the signal lamp point,
、
the blue luminance values of the first calibration block and its left counterpart reference block,
、
the blue luminance values of the second calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the third calibration block and its left counterpart reference block respectively,
、
the blue luminance values of the fourth calibration block and its right counterpart reference block respectively,
、
the blue luminance values of the fifth calibration block and the right counterpart reference block thereof,
、
the blue luminance values of the sixth calibration block and its right counterpart reference block respectively,
、
are respectively aBlue luminance values of the seventh calibration block and the reference block paired therewith,
、
the blue light brightness values of the eighth calibration block and the lower counterpart reference block thereof respectively,
the blue luminance value of the block is calibrated for the center,
for the blue luminance value of the upper pair reference block of the first calibration block,
for the blue luminance value of the upper pair reference block of the fourth calibration block,
for the blue luminance value of the lower pair of reference blocks of the third calibration block,
for the blue luminance value of the lower pair of reference blocks of said sixth calibration block,
is as follows
The blue light correction factor for a signal light point.
8. A brightness correction device for a display unit after replacement is applied to a correction system of an LED display screen, wherein the LED display screen is formed by splicing a plurality of display units; it is characterized by comprising:
the first acquisition module is used for acquiring the brightness values of the calibration blocks respectively positioned at the center, four corners and the middle point of four sides of the first display unit and acquiring the brightness values of the reference blocks respectively positioned at two ends and the middle point of one side, close to the first display unit, of the second display unit; the first display unit is the replaced display unit, the second display unit is the display unit adjacent to the first display unit, and the calibration block and the reference block are both areas with preset sizes;
the dividing module is used for dividing the first display unit into four triangular areas by using a connecting line from the center of the first display unit to the vertex of each corner;
the correction module is used for calculating the brightness correction value of each lamp point in the triangular area by adopting a linear interpolation method according to the brightness value of the calibration block at the edge of each triangular area and the brightness value of the reference block of the second display unit adjacent to the triangular area;
and the sending module is used for sending the brightness correction value of each lamp point of the first display unit to a control system of the LED display screen.
9. An electronic device comprising a processor and a memory, wherein the memory stores a computer program executable by the processor, and the processor executes the computer program to perform the steps of the method for modifying luminance of a display unit according to any one of claims 1 to 7.
10. A storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, performs the steps of the method for brightness correction of a display unit according to any of claims 1-7.
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