CN117577015A - Method, system, computer equipment and medium for correcting bright and dark lines of spherical LED display screen - Google Patents
Method, system, computer equipment and medium for correcting bright and dark lines of spherical LED display screen Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/03—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays
- G09G3/035—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes specially adapted for displays having non-planar surfaces, e.g. curved displays for flexible display surfaces
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G09G2320/00—Control of display operating conditions
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- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
A method, a system, computer equipment and a medium for correcting bright and dark lines of a spherical LED display screen belong to the technical field of LED display and solve the problems that the bright and dark lines appear on a display picture due to physical gaps among modules of the spherical LED display screen, so that the picture has a split feeling and the watching experience of a user is influenced. The method comprises the following steps: collecting coordinates of a lamp point on a gap of a display screen; and correcting the brightness of all the lamp points; and calculating the coordinate difference between every two adjacent lamp points to obtain a plurality of lamp point arc lengths, taking the average value of the lamp point arc lengths as a brightness adjustment coefficient, and taking the result of multiplying the brightness adjustment coefficient by the brightness value of the corresponding lamp point as the brightness value of the corresponding lamp point. The invention is suitable for correcting the bright and dark lines of the spherical LED display screen, is also suitable for correcting the bright and dark lines of various curved-surface screens and special-shaped screens, and can be also applied to a control method of the spherical LED display screen.
Description
Technical Field
The invention belongs to the technical field of LED display, and particularly relates to a maintenance technology of a spherical LED display screen.
Background
With the diversification of applications of LED display screens, conventional flat panel displays have failed to meet the customization needs of special markets. In common special-shaped screens, the demand of spherical inner side display screens with different sizes is higher and higher. The spherical screen is formed by a plurality of planar LED display modules, so that physical gaps are necessarily formed between the modules, bright and dark lines appear when a picture is displayed, the picture has a cracking sense, and viewing experience is seriously influenced.
The prior patent document CN115482776a discloses a method and a system for correcting bright and dark lines of a virtual pixel display screen, and the technical scheme disclosed in the document is to correct dark lines or bright lines existing at the spliced position of an LED display screen, and is a correction method based on virtual pixels. The method can effectively solve the problem of bright and dark lines generated by the joint when a plurality of LED display screens are spliced, and improves the display quality of the whole screen.
Because of the limitation of the shape of the spherical screen, each small splicing unit is curved, and even the luminous points in each splicing unit are not uniformly distributed, so that the positions of bright and dark lines generated by the whole screen are relatively large, and the existing bright and dark line correction method cannot be applied.
Disclosure of Invention
The invention provides a method for correcting bright and dark lines of a spherical LED display screen, which aims to solve the problems that a display picture can be bright and dark lines due to physical gaps between modules of the spherical LED display screen, so that the picture has a cracking sense and the watching experience of a user is influenced.
A brightness and darkness line correction method of a spherical LED display screen, wherein the spherical LED display screen is formed by splicing a plurality of display modules, m x n gaps are formed at adjacent positions of the display modules, m rows of gaps are circles parallel to wefts, and n columns of gaps are circles in a warp direction, and the method comprises the following steps:
collecting coordinates and brightness of all the light points of the spherical LED display screen to be corrected, and correcting the brightness of all the light points;
the bright and dark line correction method for each row of slits comprises the following steps:
calculating coordinate differences for all the lamp points on two sides of each row of slit, and for each pair of two opposite lamp points, obtaining a plurality of lamp point arc lengths of the row, and taking an average value of the plurality of lamp point arc lengths of the row as a standard arc length of the row;
obtaining the ratio of the arc length of each lamp point of the row to the standard arc length, taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point of the row, and adjusting the brightness of the lamp points according to the adjustment coefficient;
the bright and dark line correction method for each row of slits comprises the following steps:
calculating coordinate differences for all the light points on two sides of each row of slits and for each pair of two opposite light points to obtain a plurality of light point arc lengths of the row, and taking an average value of the plurality of light point arc lengths of the row as a standard arc length of the row;
obtaining the ratio of the arc length of each lamp point in the row to the standard arc length, and taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point in the row to realize brightness adjustment of the lamp points;
and after the adjustment of the lighting brightness of all lamps is completed, the correction of the bright and dark lines of the spherical LED display screen is completed.
Further, in the method, the method for adjusting the brightness of the lamp point according to the adjustment coefficient is as follows:
and multiplying the brightness adjustment coefficient by the brightness value of the corresponding lamp point to obtain the brightness value of the corresponding lamp point.
Further preferred is a method wherein the coordinates and brightness of all the light points are collected by a catadioptric camera system.
Further, in the preferred method, the refraction and reflection shooting system comprises a parabolic reflector and a CCD camera, the refraction and reflection shooting system is located at the center of a sphere of the spherical LED display screen to be corrected, and the parabolic reflector is used for reflecting light signals sent by the display screen to an image acquisition end of the CCD camera.
The invention also provides a system for correcting bright and dark lines of a spherical LED display screen, the spherical LED display screen is formed by splicing a plurality of display modules, m x n gaps are formed at adjacent positions of the plurality of display modules, m rows of gaps are circles parallel to wefts, n columns of gaps are circles in the warp direction, and the system comprises:
luminance and chrominance correction module: the method comprises the steps of acquiring coordinates and brightness of all light points of a spherical LED display screen to be corrected, and correcting the brightness of all the light points;
a row gap correction module: the method comprises the steps of calculating coordinate differences for all the lamp points on two sides of each row of gaps, obtaining a plurality of lamp point arc lengths of the row, and taking an average value of the plurality of lamp point arc lengths of the row as a standard arc length of the row; the system is also used for obtaining the ratio of the arc length of each lamp point of the row to the standard arc length, taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point of the row, and adjusting the brightness of the lamp points according to the adjustment coefficient;
column gap correction module: the method comprises the steps of calculating coordinate differences for all the light points on two sides of each row of gaps, obtaining a plurality of light point arc lengths of the row, and taking an average value of the plurality of light point arc lengths of the row as a standard arc length of the row; the system is also used for obtaining the ratio of the arc length of each lamp point in the row to the standard arc length, and taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point in the row to realize the brightness adjustment of the lamp points.
The invention also provides a computer device, which comprises a memory and a processor, wherein the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes any one of the brightness and darkness line correction methods of the spherical LED display screen.
The invention also provides a computer readable storage medium for storing a computer program for executing any one of the above light and dark line correction methods for the spherical LED display screen.
The invention has the beneficial effects that:
compared with the proposal recorded in the prior application CN115482776A of the applicant mentioned in the background art, the bright and dark line correction method of the spherical LED display screen is more suitable for the spherical screen, can effectively solve the bright and dark line defect existing in the spherical screen, and improves the display quality of the whole screen.
According to the bright and dark line correction method, under the condition that the brightness of the lamp points is repaired, the physical distance gap repair can be carried out on the non-standard point distance at the joint gap according to the lamp point coordinates obtained by shooting of the catadioptric camera, and the size, shape and number of the box bodies required by building the spherical screen are not limited.
The method provided by the invention can finish the correction of the bright and dark lines of the spherical screen only by shooting for at most 4 times.
The invention is suitable for correcting the bright and dark lines of the spherical LED display screen, is also suitable for correcting the bright and dark lines of various curved-surface screens and special-shaped screens, and can be also applied to a control method of the spherical LED display screen.
Drawings
Fig. 1 is a schematic diagram of a catadioptric photographing system according to an embodiment, in which 1 is a parabolic mirror and 2 is a CCD camera;
fig. 2 is a schematic diagram of a lamp spot information acquisition system according to an embodiment, wherein 3 is a catadioptric shooting system, 4 is a spherical inner display screen, and 5 is a lamp spot;
fig. 3 is a schematic diagram of a relationship between positions of light points and slits of a certain segment of slit portion in the spherical LED display screen according to the third embodiment, where hl is an arc length between a pair of light points, and 10 is an m-th row slit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
Embodiment one
The present embodiment will be described with reference to fig. 1 and 2.
In this embodiment, the spherical LED display screen is formed by splicing a plurality of display modules, where m×n slits are formed at adjacent positions of the plurality of display modules, the m rows of slits are circles parallel to the weft, and the n columns of slits are circles in the warp direction.
The method for correcting the bright and dark lines of the spherical LED display screen comprises the following steps:
collecting coordinates and brightness of all the light points of the spherical LED display screen to be corrected, and correcting the brightness of all the light points;
the bright and dark line correction method for each row of slits comprises the following steps:
calculating coordinate differences for all the lamp points on two sides of each row of slit, and obtaining a plurality of lamp point arc lengths of the row, wherein the average value of the plurality of lamp point arc lengths of the row is used as the standard arc length of the row;
taking the ratio of the arc length of each lamp point of the row to the standard arc length as an adjustment coefficient corresponding to the arc length of each lamp point of the row;
taking the adjustment coefficient of the row as the brightness adjustment coefficient of the corresponding lamp point of the row to finish the bright and dark line correction of the row;
the bright and dark line correction method for each row of slits comprises the following steps:
calculating coordinate differences for all the light points on two sides of each row of slits, and correspondingly calculating coordinate differences for every two light points to obtain a plurality of light point arc lengths of the row, and seating the average value of the plurality of light point arc lengths of the row on the standard arc length of the row;
taking the ratio of the arc length of each lamp point in the row to the standard arc length as an adjustment coefficient corresponding to the arc length of each lamp point in the row;
and taking the adjustment coefficient of the row as the brightness adjustment coefficient of the corresponding lamp point of the row to finish the bright and dark line correction of the row.
Specifically:
the position information of all the light points in the embodiment is collected by the refraction and reflection shooting system.
As shown in fig. 1, the catadioptric photographing system includes a parabolic mirror 1 and a CCD camera 2, where the parabolic mirror is used to reflect an optical signal sent by a display screen to an image acquisition end of the CCD camera.
Still further:
as shown in fig. 2, the collecting method according to the present embodiment includes: and reflecting the image of the surrounding scene to a CCD camera through a parabolic reflector, and shooting through the CCD camera to obtain all scene contents below the parabolic reflector. As shown in fig. 2: the axis of the refraction and reflection shooting system is perpendicular to the ground, the refraction and reflection shooting system is placed at the position of the spherical center of the spherical screen in a positive and inverse mode, the spherical screen of the LED is lightened, 4 pairs of pictures are shot vertically upwards, vertically downwards, horizontally leftwards and horizontally rightwards, the rest parts except the round area on the rectangular image are black, the center position is provided with a part of images which are CCD camera devices due to the shielding factors of the shooting devices, the later processing is needed, and the round points in the annular area are the lamp points of the spherical screen. Taking down the parabolic reflector, placing the CCD camera upside down and right at the spherical center of the spherical screen, and performing two-time supplementary shooting on the lighted LED spherical screen to supplement partial information shielded by the camera. And carrying out fusion and splicing on the data acquired by the installed and uninstalled reflectors to obtain all lamp point information.
In this embodiment, the obtaining of all the lamp point information and the correction of the brightness of the lamp points may be implemented by using the prior art, for example, the spherical inner screen correction method described in patent document CN116386520a, which is not described herein.
Because the number of the lamps related to each row and each column of the gap is large, the distances between the corresponding lamps on two sides of the gap cannot be kept completely consistent due to the problem of processing technology in the splicing process, bright and dark lines of the gap are generated, the display effect of the whole screen is affected, and the adjustment of the bright and dark lines is difficult due to the large number of the lamps. The method of the embodiment can realize brightness adjustment of each lamp point adjacent to the slit, thereby achieving the effect of adjusting the bright and dark lines of the slit.
In this embodiment, the dark spot position and the two spot positions are determined according to the ratio of the arc length of the lamp spot adjacent to the slit to the standard arc length, and then the brightness is adjusted.
If the ratio is larger than 1, it proves that the gap is larger and a dark seam appears, and then the two lamps at the position should be lighted up, so that the dark seam is eliminated. Otherwise, the gap is proved to be smaller, and bright gaps appear, so that the brightness of two lamp points at the gap is reduced, the lamp points are darkened, and the bright gaps are eliminated. Therefore, the brightness adjustment method for the lamp points according to the adjustment coefficient is to multiply the brightness adjustment coefficient by the brightness value of the corresponding lamp point to serve as the brightness value of the corresponding lamp point, and all the lamp points adjacent to the gap are processed to realize the brightness correction of the whole gap.
The adjustment coefficient in this embodiment should be in the range of 0.9 to 1.1, and if the ratio exceeds this range, the adjustment of the brightness cannot be achieved to compensate for the effect of the bright and dark lines, and this condition belongs to the problem of the splicing quality of the LED spherical screen, and adjustment should be performed.
Experiments prove that the method for adjusting the bright and dark lines can effectively eliminate dark spots and bright spots in the joints and achieve the correction of the bright and dark lines at the level which is difficult to be perceived by human eyes.
In this embodiment, the repair of the bright and dark lines of the spherical LED display screen is not limited to the display screen formed by the modules with regular shapes, but may be a display screen formed by trapezoid, triangle or special-shaped modules, that is: the method is not limited to the shape of the module.
Second embodiment
The present embodiment is a product corresponding to the method described in the first embodiment: a bright and dark line correction system of spherical LED display screen, spherical LED display screen is spliced by a plurality of display module and is constituteed, a plurality of adjacent positions of display module form m n gaps, m are the circle that is on a parallel with the weft, n are the circle of warp direction in the gap, the system includes:
luminance and chrominance correction module: the method comprises the steps of acquiring coordinates and brightness of all light points of a spherical LED display screen to be corrected, and correcting the brightness of all the light points;
a row gap correction module: the method comprises the steps of calculating coordinate differences for all the lamp points on two sides of each row of gaps, obtaining a plurality of lamp point arc lengths of the row, and taking an average value of the plurality of lamp point arc lengths of the row as a standard arc length of the row; the system is also used for obtaining the ratio of the arc length of each lamp point of the row to the standard arc length, taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point of the row, and adjusting the brightness of the lamp points according to the adjustment coefficient;
column gap correction module: the method comprises the steps of calculating coordinate differences for all the light points on two sides of each row of gaps, obtaining a plurality of light point arc lengths of the row, and taking an average value of the plurality of light point arc lengths of the row as a standard arc length of the row; the system is also used for obtaining the ratio of the arc length of each lamp point in the row to the standard arc length, and taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point in the row to realize the brightness adjustment of the lamp points.
Embodiment III
The present embodiment will be described with reference to fig. 3.
The present embodiment is a further example of the method for correcting the bright and dark lines of the spherical LED display screen according to the first embodiment.
S1: fixing a refraction and reflection shooting system at the position of the spherical inner sphere center, wherein the axis of the system is vertical to the ground, and shooting 4 pictures vertically upwards, vertically downwards, horizontally leftwards and horizontally rightwards by using a parabolic reflector of a CCD camera lens device; the CCD camera releases the parabolic reflector of the device and shoots 4 pictures vertically upwards, vertically downwards, horizontally leftwards and horizontally rightwards; the lamp point information in the collected pictures is combined into 2 groups, namely: spherical screen light point information in the horizontal direction and the vertical direction, wherein the information comprises brightness and coordinates.
S2: from north pole downward, as shown in fig. 3, the m-th row of slits 10 is provided to correspond to i pairs of light points, and the row has i arc lengths, and since each LED module comprises a large number of standard pitch pixel points, the number of standard arc lengths of all the slits in each row is far greater than the number of non-standard arc lengths, and therefore the average value of arc lengths of the two sides of each row of slits relative to the light points is set as the standard arc lengthAnd comparing the standard arc length with the i arc length hl corresponding to the line to obtain the ratio +.>And taking the ratio as a brightness adjustment coefficient, multiplying the brightness value of the lamp point corresponding to the arc length by the corresponding brightness adjustment coefficient ki, namely multiplying the corresponding adjustment coefficient ki by the brightness values of two lamp points which are positioned above and below the m-th row slit and are opposite to each other as shown in fig. 3, thus finishing the row of lamp point spacing correction, repeating the step, and finishing all the bright and dark line correction of the spherical screen parallel to the weft direction.
S3: setting j pairs of lamp points corresponding to the nth row of slits from the leftmost end of the equator to the right, setting the average value of the arc lengths of the lamp points in each row of slits as the standard arc lengthComparing the standard arc length with the j-segment arc length vj of the column to obtain a ratioAnd multiplying the lamp point brightness value corresponding to the arc length by the ratio kj to finish the row of lamp point spacing correction, repeating the step, and correcting the n rows of lamp point spacing to finish all the bright and dark line correction of the spherical screen parallel to the meridian direction.
Claims (8)
1. The utility model provides a bright dark line correction method of spherical LED display screen, spherical LED display screen is spliced by a plurality of display module and is constituteed, a plurality of display module adjacent positions form m n gaps, m are the circle that is on a parallel with the weft, n are the circle of warp direction for the gap, its characterized in that, the method includes:
collecting coordinates and brightness of all the light points of the spherical LED display screen to be corrected, and correcting the brightness of all the light points;
the bright and dark line correction method for each row of slits comprises the following steps:
calculating coordinate differences for all the lamp points on two sides of each row of slit, and for each pair of two opposite lamp points, obtaining a plurality of lamp point arc lengths of the row, and taking an average value of the plurality of lamp point arc lengths of the row as a standard arc length of the row;
obtaining the ratio of the arc length of each lamp point of the row to the standard arc length, taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point of the row, and adjusting the brightness of the lamp points according to the adjustment coefficient;
the bright and dark line correction method for each row of slits comprises the following steps:
calculating coordinate differences for all the light points on two sides of each row of slits, and calculating coordinate differences for two light points which are not opposite to each other to obtain a plurality of light point arc lengths of the row, wherein an average value of the plurality of light point arc lengths of the row is used as a standard arc length of the row;
obtaining the ratio of the arc length of each lamp point in the row to the standard arc length, and taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point in the row to realize brightness adjustment of the lamp points;
and after the adjustment of the lighting brightness of all lamps is completed, the correction of the bright and dark lines of the spherical LED display screen is completed.
2. The method for correcting the bright and dark lines of the spherical LED display screen according to claim 1, wherein the method for adjusting the brightness of the lamp according to the adjustment coefficient is as follows:
and multiplying the brightness adjustment coefficient by the brightness value of the corresponding lamp point to obtain the brightness value of the corresponding lamp point.
3. The method for correcting the bright and dark lines of the spherical LED display screen according to claim 1, wherein the coordinates and the brightness and the color degree of all the lamp points are collected by a refraction and reflection shooting system.
4. The method for correcting the bright and dark lines of the spherical LED display screen according to claim 3, wherein the refraction and reflection shooting system comprises a parabolic mirror and a CCD camera, and the refraction and reflection shooting system is positioned at the center of sphere of the spherical LED display screen to be corrected.
5. The method for correcting the bright and dark lines of a spherical LED display screen according to claim 4, wherein the parabolic reflector is used for reflecting light signals emitted by the display screen to an image acquisition end of the CCD camera.
6. The utility model provides a bright dark line correction system of spherical LED display screen, spherical LED display screen comprises a plurality of display module concatenation, a plurality of display module adjacent positions form m n gaps, m are the circle that is on a parallel with the weft in the gap, n are the circle of warp direction in the gap, its characterized in that, the system includes:
luminance and chrominance correction module: the method comprises the steps of acquiring coordinates and brightness of all light points of a spherical LED display screen to be corrected, and correcting the brightness of all the light points;
a row gap correction module: the method comprises the steps of calculating coordinate differences for all the lamp points on two sides of each row of gaps, obtaining a plurality of lamp point arc lengths of the row, and taking an average value of the plurality of lamp point arc lengths of the row as a standard arc length of the row; the system is also used for obtaining the ratio of the arc length of each lamp point of the row to the standard arc length, taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point of the row, and adjusting the brightness of the lamp points according to the adjustment coefficient;
column gap correction module: the method comprises the steps of calculating coordinate differences for all the light points on two sides of each row of gaps, obtaining a plurality of light point arc lengths of the row, and taking an average value of the plurality of light point arc lengths of the row as a standard arc length of the row; the system is also used for obtaining the ratio of the arc length of each lamp point in the row to the standard arc length, and taking the ratio as the brightness adjustment coefficient of two lamp points corresponding to the arc length of the lamp point in the row to realize the brightness adjustment of the lamp points.
7. A computer device, characterized in that the device comprises a memory and a processor, the memory having stored therein a computer program, which when run by the processor performs a method of correcting bright and dark lines of a spherical LED display screen according to any one of claims 1-5.
8. A computer-readable storage medium, characterized by: the storage medium is used for storing a computer program for executing the bright and dark line correction method of the spherical LED display screen according to any one of claims 1 to 5.
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