CN115862530B - Correction method and device for special-shaped LED screen, electronic equipment and storage medium - Google Patents
Correction method and device for special-shaped LED screen, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention provides a correction method and device for a special-shaped LED screen, electronic equipment and a storage medium, relates to control of an indicating device for displaying variable information by a static method, and particularly relates to the field of display screen correction. The problems that in the prior art, manual correction is adopted to correct the special-shaped LED screen, the process is complex, time and labor are consumed, the efficiency is low, the universality is poor, the correction accuracy is poor, the subtle difference on display is difficult to identify, and the visual effect after correction is often unsatisfactory are solved. The special-shaped LED screen is formed by splicing M-type modules; and calling the positioning information in the positioning data unit of the ith single-class module to obtain the centroid coordinate and centroid radius of each lamp point in the ith module to be corrected. The LED screen detection device is mainly used in the technical fields of production detection, installation and maintenance of LED screens with various shapes.
Description
Technical Field
The invention relates to control of an indication device for displaying variable information by a static method, in particular to the field of display screen correction.
Background
Along with the higher and higher personalized requirements of people on the LED display screen, many indoor places such as science and technology museums, exhibition halls, art halls and the like can adopt the form of playing videos by the special-shaped LED screen to attract eyeballs of visitors and increase visual impact effects.
Those skilled in the art know that the LED display screen is formed by splicing a plurality of LED display modules, wherein the LED display modules, for short, are integrated with a plurality of LED lamp chips arranged in an array on the module, and the LED lamp chips are also called as lamp points, and the lamp points are used for emitting light. The whole screen of the traditional LED display screen is in a regular rectangular shape, and correspondingly, the module of the traditional LED display screen is also in a rectangular shape; the special-shaped LED screens are quite different, so that the screens of the special-shaped LED screens display different non-rectangular geometric shapes, such as spheres, diamonds, magic cubes and the like, and the modules for splicing the special-shaped LED screens are not rectangular any more, and are possibly trapezoid or triangle, that is to say, the modules of the special-shaped LED screens also belong to special-shaped modules.
Because the LED display screen is formed by splicing a plurality of modules, the uniformity of the brightness of the luminescence among the modules can influence the display effect of the whole display screen; meanwhile, a lamp point is integrated on the module, and the uniformity of the brightness and the color intensity of the light emitted among the lamp points can influence the display effect of the single module, thereby influencing the display effect of the whole display screen. Therefore, in order to ensure the display effect of the LED display screen, the display effect of each light point in the LED display screen needs to be corrected.
Aiming at the traditional LED display screen, as the modules are rectangular in specification, the corresponding correction method is quite mature; however, for the modules in the special-shaped LED screen, as the special-shaped LED screen and the modules forming the special-shaped LED screen have no uniform specification, the special-shaped LED screen has various different shapes or sizes, and the traditional correction method is not applicable. How to correct the LED screen with various special shapes and sizes has become a difficulty in the industry.
The existing correction for the special-shaped LED screen is mostly manual on-site correction, namely, a mode of manually adjusting the brightness of each lamp point by observing the display difference of the lamp points by naked eyes is adopted; and once a certain area of the special-shaped LED screen is damaged, the replaced display screen module needs to be reorganized by hands to adjust brightness again for correction. The special-shaped LED screen is corrected manually, the whole process is complex, time and labor are consumed, the efficiency is low, the universality is poor, the correction accuracy is poor, the subtle differences on the display are difficult to identify, and the corrected visual effect is often unsatisfactory.
Disclosure of Invention
The invention provides a correction method, a correction device, electronic equipment and a correction medium for a special-shaped LED screen, which solve the problems that in the prior art, the special-shaped LED screen is corrected manually, the process is tedious, the time and the labor are consumed, the efficiency is low, the universality is poor, the correction accuracy is poor, the subtle difference on display is difficult to identify, and the corrected visual effect is often unsatisfactory.
The invention relates to a correction method of a special-shaped LED screen, which comprises the following steps:
the special-shaped LED screen is formed by splicing M types of modules, the method is to correct each type of module respectively, and further correction of the special-shaped LED screen is achieved, the correction method for the i type of module to be corrected is as follows, wherein i=1, 2, … …, M:
s1, acquiring an ith single-type module positioning data unit corresponding to an ith module to be corrected from a whole screen positioning database;
s2, positioning information in the i single-class module positioning data unit is called, and centroid coordinates and centroid radiuses of each lamp point in the i single-class module to be corrected are obtained;
s3, placing the i-th type module to be corrected at a fixed acquisition position phi relative to external acquisition equipment i Collecting the image of the i-th type module to be corrected;
s4, calculating the lamp lighting degree information of the ith class of module to be corrected according to the image of the ith class of module to be corrected and the centroid coordinates and centroid radius of each lamp point in the ith class of module to be corrected;
s5, calculating a brightness correction coefficient of the ith class of module to be corrected according to the lamp brightness information of the ith class of module to be corrected and the whole screen correction standard cone;
s6, correcting the ith class of module to be corrected according to the brightness correction coefficient of the ith class of module to be corrected.
Further, a preferred embodiment is provided, wherein each module is a module with the same shape, size and light point distribution.
Further, a preferred embodiment is provided, wherein the whole screen positioning database comprises M single-class module positioning data units;
the i-th single-type module positioning data unit stores the centroid coordinates and centroid radii of each lamp point in the i-th type module to be corrected.
Further, there is provided a preferred embodiment, wherein the ith single-class module positioning data unit is created by the following method:
ST1, selecting one module in the i-th type module to be corrected as a positioning module, and placing the positioning module at a fixed acquisition position phi relative to external acquisition equipment i Collecting an image of the positioning module;
ST2, according to the image of the positioning module, carrying out centroid positioning on each lamp point on the positioning module one by one to obtain centroid coordinates and centroid radiuses of each lamp point on the positioning module;
and ST3, creating an ith single-type module positioning data unit, and storing the centroid coordinates and centroid radiuses of each lamp point on the positioning module as positioning information in the ith single-type module positioning data unit.
Further, a preferred embodiment is provided, wherein the step ST2 is specifically as follows:
ST2.1, calculating an optimal threshold value of the image of the positioning module by using an oxford method, and converting the image into a binary image according to the optimal threshold value;
ST2.2, extracting the lamp point outline of each lamp point through edge detection for the binary image;
and ST2.3, calculating the centroid coordinates and centroid radius of each lamp point according to the lamp point outline.
Further, a preferred embodiment is provided, wherein the step S2 is specifically as follows:
s2.1, according to the arrangement positions of the lamp points to be positioned in the ith type of module to be corrected, obtaining corresponding lamp points which are positioned in the same arrangement positions on the positioning module in the ith type of module to be corrected;
s2.2, calling the positioning information in the positioning data unit of the ith single-type module to obtain the centroid coordinates and centroid radiuses of the corresponding lamp points in the positioning module;
s2.3, taking the centroid coordinates and centroid radiuses of the corresponding lamp points in the positioning module as the centroid coordinates and centroid radiuses of the corresponding lamp points of the i-th type module to be corrected, and obtaining the centroid coordinates and centroid radiuses of each lamp point in the given module.
The invention also provides a correction device of the special-shaped LED screen, which has the following technical scheme:
correction device of dysmorphism LED screen, dysmorphism LED screen is formed by the concatenation of M class module, the device is including correcting the module to each class module respectively, and then realizes correcting dysmorphism LED screen, and the correction module to the i class module of waiting to correct is as follows, wherein i=1, 2, … …, M:
obtaining a sub-module of an ith single-type module positioning data unit corresponding to an ith module to be corrected from a whole screen positioning database;
the positioning information in the positioning data unit of the ith single-class module is called, and the sub-module of the centroid coordinate and the centroid radius of each lamp point in the ith single-class module to be corrected is obtained;
placing any i-th module to be corrected at a fixed acquisition position phi relative to external acquisition equipment i A sub-module for collecting the image of the i-th type module to be corrected;
calculating a sub-module of the lamp lighting information of the ith class of module to be corrected according to the image of the ith class of module to be corrected and the centroid coordinates and centroid radius of each lamp point in the ith class of module to be corrected;
calculating a sub-module of the brightness correction coefficient of the ith class of module to be corrected according to the lamp brightness information of the ith class of module to be corrected and the whole screen correction standard cone;
and correcting the class i module to be corrected according to the brightness correction coefficient of the class i module to be corrected.
The invention also provides electronic equipment, which has the following technical scheme:
an electronic device, comprising: the correction device comprises a processor and a memory, wherein the memory is used for storing executable instructions of the processor, and the processor is configured to execute the correction method of the special-shaped LED screen by executing the executable instructions.
The invention also provides a storage medium, which has the following technical scheme:
a storage medium, in which a computer program is stored, which when run, performs the above-mentioned method for correcting a profiled LED screen.
The invention provides a correction method, which is characterized in that a database is constructed according to inherent characteristics such as the shape of a module, the correction method is based on data of the database to finish correction of a special-shaped screen, and compared with the traditional correction method which needs to manually correct each module in the special-shaped screen one by one, the correction method has the advantages that the correction principle is completely different, the correction procedure is greatly reduced, the work efficiency is further improved, and the correction accuracy is ensured, and the correction method has the following specific beneficial effects:
1. according to the invention, the modules of the special-shaped LED screen are classified, so that the modules with different shapes and sizes can be corrected, and the correction universality is high;
2. according to the invention, the lamp point positioning is carried out on one module in each type of module and stored in the database, so that the lamp point positioning information of all the modules in the same type of module can be conveniently and rapidly obtained when the correction is carried out, the correction process is simple, time and labor are saved, and the correction efficiency is high;
3. according to the invention, the lamp point positioning information is obtained through the database, the lamp lighting chromaticity information is obtained through image acquisition, and the correction is automatically carried out through the correction coefficient, so that the naked eye observation and manual adjustment of a person are not needed, the correction accuracy is high, the slight difference on the lamp point display can be identified, and the corrected visual effect is good. The correction method, the correction device, the electronic equipment and the storage medium of the special-shaped LED screen are suitable for the technical fields of production detection, installation and maintenance of LED screens with various shapes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing the classification of a ox horn bar LED display screen according to the preferred embodiment of the present invention;
fig. 2 is a schematic diagram showing the classification of hemispheres on a spherical LED display screen in a preferred embodiment of the present invention.
Detailed Description
In order to make the technical solution and the advantages of the present invention more clear, the detailed description of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment one, referring to fig. 1 to fig. 2, describes a method for correcting a special-shaped LED screen according to the present embodiment, and the specific embodiment is as follows:
the correction method of the special-shaped LED screen is characterized in that the special-shaped LED screen is formed by splicing M types of modules, the method is to correct each type of module respectively, and further correction of the special-shaped LED screen is achieved, the correction method of the i type of module to be corrected is as follows, wherein i=1, 2, … …, M:
s1, acquiring an ith single-type module positioning data unit corresponding to an ith module to be corrected from a whole screen positioning database;
s2, positioning information in the i single-class module positioning data unit is called, and centroid coordinates and centroid radiuses of each lamp point in the i single-class module to be corrected are obtained;
s3, placing any i type module to be corrected at a fixed acquisition position phi relative to external acquisition equipment i Collecting the image of the i-th type module to be corrected;
s4, calculating the lamp lighting degree information of the ith class of module to be corrected according to the image of the ith class of module to be corrected and the centroid coordinates and centroid radius of each lamp point in the ith class of module to be corrected;
s5, calculating a brightness correction coefficient of the ith class of module to be corrected according to the lamp brightness information of the ith class of module to be corrected and the whole screen correction standard cone;
s6, correcting the ith class of module to be corrected according to the brightness correction coefficient of the ith class of module to be corrected.
In this embodiment, when acquiring a model image, attention is paid to:
the fixed acquisition positions of the same type of modules are the same as those of the positioning modules belonging to the same type in the whole screen positioning database; the fixed acquisition positions are different for modules belonging to different classes.
In this embodiment, the whole screen correction standard cone refers to standard cone brightness and chroma for special-shaped LED screen correction. In a further embodiment, the whole screen correction standard cone may be a preset brightness value, or may be a brightness value of a specific module set specified in the special-shaped LED screen. And controlling the brightness of all modules in the special-shaped LED screen to be consistent with the whole screen correction standard (namely, preset brightness value or brightness of a specified module) during correction. If the whole screen correction only needs to carry out brightness correction, the whole screen correction standard cone refers to standard cone brightness for the special-shaped LED screen correction, and the standard cone brightness can be a preset brightness value or the brightness of a certain fixed module in the special-shaped LED screen.
In this embodiment, the calculation of the luminance and chrominance correction coefficient according to the lamp luminance and the correction of the module according to the luminance and chrominance correction coefficient are realized by the prior art. If the correction of the special-shaped LED screen is only to correct the brightness, the brightness correction coefficient is calculated according to the lamp lighting brightness information, and the correction is carried out according to the brightness correction coefficient. It is also known in the art to calculate a luminance correction coefficient based on the lamp lighting intensity information.
In this embodiment, obtain lamp point location information through whole screen location database, obtain lamp lighting chromaticity information through image acquisition and through correction coefficient automatic correction, need not the naked eye of people and observe and manual regulation, the rate of accuracy of correction is high, can discern the slight difference on the lamp point shows, and visual effect after the correction is good.
In the embodiment, the correction process is simple, time-saving and labor-saving, and the correction efficiency is high.
In a further embodiment, each of the modules is specifically as follows:
each type of module is the same in shape, size and lamp point distribution.
In this embodiment, all modules forming the special-shaped LED screen are divided into a plurality of types of modules according to the sizes and shapes of the modules and the distribution of the light points on the modules. For example, a ox horn bar counter LED display screen is a common special-shaped LED screen, and the whole screen looks like a ox head and is formed by splicing triangular modules with the same size, shape and lamp point distribution. The modules of the ox horn bar counter LED display screen are classified, so that all triangle modules forming the ox horn bar counter LED display screen can be classified into one type, namely a single type module, and can be given a classification number N1. For example, a spherical LED display screen is another common special-shaped LED screen, and the whole screen is enclosed into a sphere, and is formed by splicing trapezoid modules with different sizes according to the longitude and latitude directions of the sphere. For the spherical LED display screen, the spherical LED display screen can be seen as being composed of an upper hemisphere and a lower hemisphere, and for the upper hemisphere of the spherical LED display screen, the spherical LED display screen can be split into a plurality of circular ring structures formed by splicing trapezoid modules and circular modules at the position of a spherical north pole, wherein each circular ring structure is composed of trapezoid modules with the same size, shape and lamp point distribution, the trapezoid modules forming each circular ring structure can be classified into one type of modules, and each type of modules is classified and numbered; if the spherical north pole position of the upper hemisphere of the spherical LED display screen is hollowed out and the hemisphere is formed by 6 circular ring structures, the modules forming the upper hemisphere of the spherical LED display screen can be divided into 6 types of modules, and the numbers of the modules are N1-N6, namely a type 1 module, a type 2 module and a type … … type 6 module; if the spherical north pole position of the upper hemisphere of the spherical LED display screen is a circular module, and the circular ring structure is still 6, the modules forming the upper hemisphere of the spherical LED display screen can be divided into 7 single-class modules with the numbers of N1-N7, wherein the circular modules at the spherical north pole position are separately classified into one class of modules.
In this embodiment, the light points on the modules are arranged in the same type, for example, one module has light points uniformly distributed in a rectangular array of 5 rows and 5 columns, and the other module belongs to the same type of single module, and also has light points uniformly distributed in a rectangular array of 5 rows and 5 columns.
In this embodiment, a classification mark may be marked on the classified module, where the classification mark may record a classification number; in some simple cases, of course, people can correspond the module and the classification number with naked eyes, and the classification mark is not required to be marked.
In the embodiment, all the modules forming the special-shaped LED screen are classified to obtain the classified modules, so that when the modules are corrected, the modules of the same type can be corrected by adopting the same module correction method, the problem that the universality of the traditional module correction method is poor due to the fact that the shapes and the sizes of the modules are different in the correction of the special-shaped LED screen module is solved, and the correction efficiency of the special-shaped LED screen module is effectively improved.
In a second embodiment, referring to fig. 1 to fig. 2, the present embodiment is further defined by the whole screen positioning database in the method for correcting a special-shaped LED screen according to the first embodiment, and the specific implementation contents are as follows:
the whole screen positioning database comprises the following specific steps:
the whole screen positioning database comprises M single-class module positioning data units;
the i-th single-type module positioning data unit stores the centroid coordinates and centroid radii of each lamp point in the i-th type module to be corrected.
In a further embodiment, the ith single-class module positioning data unit is created by the following method:
ST1, selecting one module of the ith type of module to be corrected as a positioning module, and setting the positioning module relative to external collectionIs placed at a fixed acquisition position phi i Collecting an image of the positioning module;
ST2, according to the image of the positioning module, carrying out centroid positioning on each lamp point on the positioning module one by one to obtain centroid coordinates and centroid radiuses of each lamp point on the positioning module;
and ST3, creating an ith single-type module positioning data unit, and storing the centroid coordinates and centroid radiuses of each lamp point on the positioning module as positioning information in the ith single-type module positioning data unit.
In this embodiment, the method for obtaining the centroid coordinates and centroid radii of each lamp point on the module according to the module image is a conventional technical means.
In this embodiment, the fixed acquisition positions are different for the positioning modules belonging to different classes.
In this embodiment, the single-class module positioning data units of the modules are in one-to-one correspondence with the classification of the modules, and the modules are classified into more than one class, and more than one single-class module positioning data units are available.
In a further embodiment, the step ST2 is specifically as follows:
ST2.1, calculating an optimal threshold value of the image of the positioning module by using an oxford method, and converting the image into a binary image according to the optimal threshold value;
ST2.2, extracting the lamp point outline of each lamp point through edge detection for the binary image;
and ST2.3, calculating the centroid coordinates and centroid radius of each lamp point according to the lamp point outline.
In a third embodiment, referring to fig. 1 to fig. 2, the present embodiment is further limited to the step S2 in the method for correcting a special-shaped LED panel according to the first embodiment, and the specific implementation contents are as follows:
the step S2 specifically includes the following steps:
s2.1, according to the arrangement positions of the lamp points to be positioned in the ith type of module to be corrected, obtaining corresponding lamp points which are positioned in the same arrangement positions on the positioning module in the ith type of module to be corrected;
s2.2, calling the positioning information in the positioning data unit of the ith single-type module to obtain the centroid coordinates and centroid radiuses of the corresponding lamp points in the positioning module;
s2.3, taking the centroid coordinates and centroid radiuses of the corresponding lamp points in the positioning module as the centroid coordinates and centroid radiuses of the corresponding lamp points of the i-th type module to be corrected, and obtaining the centroid coordinates and centroid radiuses of each lamp point in the given module.
In this embodiment, after classifying the modules, the positioning information of each module in each type of module needs to be obtained. Because the shape, the size and the arrangement mode of the lamp points of each type of module are the same, the module images are collected at the same fixed collecting positions only by ensuring the modules in the same type of module, and then the collected image of any one module in the same type of module is used as the positioning information of the lamp points, so that the module can be suitable for all modules in the same type of module. Therefore, only one module is selected from each type of single module, and is used as a positioning module to acquire images and obtain the barycenter coordinates and barycenter radius of the lamp points. In this embodiment, only the lamp positioning information of one module (i.e., the positioning module) in each single module is required to be obtained, so that the lamp positioning information of all the modules can be obtained, the correction process is simplified, and the correction efficiency is improved.
In this embodiment, the light points are arranged in the same type of module, so that one light point can be found at the same position of the same type of module when the module is positioned at a certain position, and the two light points are corresponding. For example, a rectangular coordinate system is drawn on the positioning module, assuming that 100 lamps are arranged in a rectangular array form on the positioning module, and the 5 th row and 5 th column of lamps in the rectangular array are located at the positions of coordinates (5, 5), the positioning module and the positioning module are classified into another module of the same type, and the same rectangular coordinate system is drawn on the module in the same way, the same type of module also has 100 lamps arranged in a rectangular array form, and the 5 th row and 5 th column of lamps in the rectangular array are also located at the positions of coordinates (5, 5) in the same type of module.
In this embodiment, the step is to calculate the centroid coordinates and centroid radii of each light point on the positioning module, that is, the light point positioning information of the positioning module.
In this embodiment, the method for processing the collected positioning module image and calculating the centroid coordinates and centroid radii of each light point according to the processed image are conventional methods, and any other suitable method may be adopted to obtain the centroid coordinates and centroid radii of each light point.
In this embodiment, the obtained lamp positioning information of the positioning module may be used to perform lamp positioning on all modules classified as the same type as the positioning module, so long as all modules classified as the same type adopt the same fixed acquisition position.
In a fourth embodiment, referring to fig. 1 to 2, the present embodiment is further defined in step S3 in the method for correcting a special-shaped LED panel according to the first embodiment, and the specific implementation contents are as follows:
the fixed acquisition positions of different types of modules to be corrected are also different.
In a fifth embodiment, referring to fig. 1 to fig. 2, the correction device for a special-shaped LED screen is provided in this embodiment, and the specific embodiment is as follows:
the special-shaped LED screen is formed by splicing M types of modules, the device comprises correction modules for each type of module respectively, correction of the special-shaped LED screen is achieved, the correction modules for the ith type of module to be corrected are as follows, wherein i=1, 2, … …, M:
obtaining a sub-module of an ith single-type module positioning data unit corresponding to an ith module to be corrected from a whole screen positioning database;
the positioning information in the positioning data unit of the ith single-class module is called, and the sub-module of the centroid coordinate and the centroid radius of each lamp point in the ith single-class module to be corrected is obtained;
any one of the ith classesThe module to be corrected is arranged at a fixed acquisition position phi relative to external acquisition equipment i A sub-module for collecting the image of the i-th type module to be corrected;
calculating a sub-module of the lamp lighting information of the ith class of module to be corrected according to the image of the ith class of module to be corrected and the centroid coordinates and centroid radius of each lamp point in the ith class of module to be corrected;
calculating a sub-module of the brightness correction coefficient of the ith class of module to be corrected according to the lamp brightness information of the ith class of module to be corrected and the whole screen correction standard cone;
and correcting the class i module to be corrected according to the brightness correction coefficient of the class i module to be corrected.
In this embodiment, the correction device for the special-shaped LED panel is used to execute the correction method for the special-shaped LED panel in the first embodiment.
The technical solution provided by the present invention is described in further detail through several specific embodiments, so as to highlight the advantages and benefits of the technical solution provided by the present invention, however, the above specific embodiments are not intended to be limiting, and any reasonable modification and improvement, reasonable combination of embodiments, equivalent substitution, etc. of the present invention based on the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (9)
1. The correction method for the special-shaped LED screen is characterized in that the method is to correct each type of module respectively, and further achieve correction of the special-shaped LED screen, and the correction method for the i type of module to be corrected is as follows, wherein i=1, 2, … …, M:
s1, acquiring an ith single-type module positioning data unit corresponding to an ith module to be corrected from a whole screen positioning database;
s2, positioning information in the i single-class module positioning data unit is called, and centroid coordinates and centroid radiuses of each lamp point in the i single-class module to be corrected are obtained;
s3, placing any i type module to be corrected at a fixed acquisition position phi relative to external acquisition equipment i Collecting the image of the i-th type module to be corrected;
s4, calculating the lamp lighting degree information of the ith class of module to be corrected according to the image of the ith class of module to be corrected and the centroid coordinates and centroid radius of each lamp point in the ith class of module to be corrected;
s5, calculating a brightness correction coefficient of the ith class of module to be corrected according to the lamp brightness information of the ith class of module to be corrected and the whole screen correction standard cone;
s6, correcting the ith class of module to be corrected according to the brightness correction coefficient of the ith class of module to be corrected.
2. The method for correcting the abnormal LED screen according to claim 1, wherein each type of module is a type of module with the same shape, size and lamp point distribution.
3. The method for correcting the special-shaped LED screen according to claim 1, wherein the whole screen positioning database comprises M single-class module positioning data units;
the i-th single-type module positioning data unit stores the centroid coordinates and centroid radii of each lamp point in the i-th type module to be corrected.
4. The method for correcting the special-shaped LED screen according to claim 3, wherein the ith single-class module positioning data unit is created by adopting the following method:
ST1, selecting one module in the i-th type module to be corrected as a positioning module, and placing the positioning module at a fixed acquisition position phi relative to external acquisition equipment i Collecting an image of the positioning module;
ST2, according to the image of the positioning module, carrying out centroid positioning on each lamp point on the positioning module one by one to obtain centroid coordinates and centroid radiuses of each lamp point on the positioning module;
and ST3, creating an ith single-type module positioning data unit, and storing the centroid coordinates and centroid radiuses of each lamp point on the positioning module as positioning information in the ith single-type module positioning data unit.
5. The method for correcting a special-shaped LED screen according to claim 4, wherein the step ST2 is specifically as follows:
ST2.1, calculating an optimal threshold value of the image of the positioning module by using an oxford method, and converting the image into a binary image according to the optimal threshold value;
ST2.2, extracting the lamp point outline of each lamp point through edge detection for the binary image;
and ST2.3, calculating the centroid coordinates and centroid radius of each lamp point according to the lamp point outline.
6. The method for correcting a special-shaped LED screen according to claim 5, wherein the step S2 is specifically as follows:
s2.1, according to the arrangement positions of the lamp points to be positioned in the ith type of module to be corrected, obtaining corresponding lamp points which are positioned in the same arrangement positions on the positioning module in the ith type of module to be corrected;
s2.2, calling the positioning information in the positioning data unit of the ith single-type module to obtain the centroid coordinates and centroid radiuses of the corresponding lamp points in the positioning module;
s2.3, taking the centroid coordinates and centroid radiuses of the corresponding lamp points in the positioning module as the centroid coordinates and centroid radiuses of the corresponding lamp points of the i-th type module to be corrected, and obtaining the centroid coordinates and centroid radiuses of each lamp point in the given module.
7. Correction device of dysmorphism LED screen, dysmorphism LED screen is formed by the concatenation of M class module, its characterized in that, the device is including correcting the module to each class module respectively, and then realizes correcting dysmorphism LED screen, and the correction module to the i class module of waiting to correct is as follows, wherein i=1, 2, … …, M:
obtaining a sub-module of an ith single-type module positioning data unit corresponding to an ith module to be corrected from a whole screen positioning database;
the positioning information in the positioning data unit of the ith single-class module is called, and the sub-module of the centroid coordinate and the centroid radius of each lamp point in the ith single-class module to be corrected is obtained;
placing any i-th module to be corrected at a fixed acquisition position phi relative to external acquisition equipment i A sub-module for collecting the image of the i-th type module to be corrected;
calculating a sub-module of the lamp lighting information of the ith class of module to be corrected according to the image of the ith class of module to be corrected and the centroid coordinates and centroid radius of each lamp point in the ith class of module to be corrected;
calculating a sub-module of the brightness correction coefficient of the ith class of module to be corrected according to the lamp brightness information of the ith class of module to be corrected and the whole screen correction standard cone;
and correcting the class i module to be corrected according to the brightness correction coefficient of the class i module to be corrected.
8. An electronic device, comprising: a processor and a memory, characterized in that the memory is used for storing executable instructions of the processor, the processor being configured to perform the method of correcting a profiled LED screen according to any one of claims 1-6 via execution of the executable instructions.
9. A storage medium, characterized in that the storage medium has stored therein a computer program which, when run, performs the method of correcting a profiled LED screen as claimed in any one of claims 1 to 6.
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| CN116758163B (en) * | 2023-08-15 | 2023-11-14 | 长春希达电子技术有限公司 | Optical information extraction method and device and spherical display screen correction method and device |
| CN117577015B (en) * | 2023-08-18 | 2024-07-16 | 长春希达电子技术有限公司 | Method, system, computer equipment and medium for correcting bright and dark lines of spherical LED display screen |
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