WO2019134317A1

WO2019134317A1 - Full-screen correction method and correction system for led display screen, and storage medium

Info

Publication number: WO2019134317A1
Application number: PCT/CN2018/085948
Authority: WO
Inventors: 谢明璞; 严振航; 孙兴红; 李选中; 吴振志; 吴涵渠
Original assignee: 深圳市奥拓电子股份有限公司
Priority date: 2018-01-08
Filing date: 2018-05-08
Publication date: 2019-07-11
Also published as: CN108320696A

Abstract

A full-screen correction method and correction system for an LED display screen, and a storage medium. The correction method comprises the following steps: acquiring a full-screen image of an LED display screen (S102); determining boundary pixel points of an LED module according to the acquired full screen image, and acquiring a spatial uniformity parameter of the boundary pixel points (S104); obtaining a correction coefficient, according to a pre-set algorithm, from a spatial uniformity parameter of a pixel matrix between the LED modules (S106); and using the correction factor in the LED display screen for full-screen correction (S108). According to the full-screen correction method and correction system for an LED display screen, and the storage medium, a correction coefficient is calculated based on spatial uniformity, and correction can be carried out by using a normal camera or a mobile phone, thereby reducing the correction cost, and greatly reducing the amount of data analysis; and real-time correction can be carried out without displaying a specific corrected image.

Description

Full screen correction method, calibration system and storage medium for LED display screen

[0001] The present invention relates to the field of display screen correction, and in particular, to a full screen correction method, a calibration system, and a storage medium for an LED display screen.

Background technique

[0002] Generally, a large-area LED display screen is formed by splicing a plurality of small LH) modules, and a single LED module is factory-corrected at the time of shipment, but the entire screen formed after splicing may cause a whole due to splicing error. The brightness of the screen is not uniform. Therefore, it is necessary to perform secondary correction on the entire screen after the splicing is completed.

[0003] The existing correction method generally uses a professional camera to perform brightness and color gamut analysis on all LED pixel lamps on the LED screen body, and obtains correction coefficients of all points, and then applies the correction coefficient to the screen body. However, professional intersections are expensive and inconvenient to use, resulting in higher calibration costs.

Summary of invention

technical problem

Problem solution

Technical solution

[0004] Based on this, it is necessary to provide a full screen correction method, a correction system, and a storage medium for the LE D display screen for the problem of high correction cost of the secondary correction of the LED display screen.

[0005] A first aspect of the present invention provides a method for correcting a full screen of an LED display screen, the method comprising the following steps

[0006] obtaining a full screen image of the LED display screen;

[0007] determining a boundary pixel point of the LED module according to the obtained full screen image, and acquiring a spatial uniformity parameter of the boundary pixel point;

[0008] obtaining a correction coefficient according to a preset algorithm by a pixel lattice spatial uniformity parameter between the LED modules;

[0009] The correction coefficient is used for the LED display screen for full screen correction.

[0010] In one embodiment, the obtaining spatial uniformity parameters of the boundary pixel points includes:

[0011] acquiring location information of boundary pixel points; [0012] determining a position of four corrected pixel points adjacent to the boundary pixel point according to position information of the pixel point; [0013] calculating a distance D1, D2 between the boundary pixel point and the four corrected pixel points based on image analysis , D3 and D4

[0014] wherein one of the four quadrilaterals formed by the corrected pixel points is parallel to the edge line of the LED module.

[0015] In one embodiment, the pixel matrix spatial uniformity parameter between the LED modules is obtained according to a preset algorithm, and the correction coefficients are:

[0016] obtaining the pixel spacing D in the module of the LED module where the boundary pixel is located;

[0017] The correction coefficient is calculated according to the pixel pitch D in the module and the distances D1, D2, D3 and D4 between the boundary pixel and the four corrected pixel points.

[0018] In one embodiment, the pixel spacing D in the module of the LED module where the boundary pixel is located includes:

[0019] calculating the pixel pitch D in the module of the LED module where the boundary pixel is located based on image analysis; or

[0020] Reading the preset pixel pitch D in the module.

[0021] In one embodiment, the distances D1, D2, D3, and D4 between the boundary pixel point and the four corrected pixel points are directly obtained by image analysis; or

[0022] The distances D1, D2, D3, and D4 between the boundary pixel point and the four corrected pixel points are obtained by correcting the distance value between the boundary pixel point and the four corrected pixel points obtained by image analysis.

[0023] In one embodiment, the correcting the distance value between the boundary pixel point and the four corrected pixel points obtained by the image analysis comprises: selecting a boundary pixel and four corrected pixels according to the image analysis. The proximity of the distance values between the points is corrected.

[0024] In one embodiment, the preset algorithm is: a correction coefficient = (D1 + D2) * (D3 + D4) /

(4*D*D).

[0025] A second aspect of the present invention provides a full screen correction system for an LED display screen, including:

[0026] an acquiring component, configured to acquire a full screen image of the LED display screen;

[0027] an image analyzing component, configured to determine a boundary pixel point of the LED module according to the acquired full screen image, and obtain a spatial uniformity parameter of the boundary pixel; and

[0028] a calculating component, configured to obtain a correction coefficient according to a preset algorithm. [0029] In one embodiment, the image analysis component includes:

[0030] a position obtaining component, configured to acquire position information of the boundary pixel, and determine a position of the four corrected pixel points adjacent to the boundary pixel according to the position information of the pixel; and

[0031] a calculation component, configured to calculate a distance between the boundary pixel and the four corrected pixels, D1, D2, D3, and

D4.

[0032] A third aspect of the invention provides a machine readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements full screen correction of the LED display screen according to any of the above method.

Advantageous effects of the invention

Beneficial effect

[0033] The above-mentioned LED screen display full-screen correction method, correction system and storage medium calculate the correction coefficient based on spatial uniformity, instead of the prior art calculation of the correction coefficient based on optical uniformity, since the analysis of spatial uniformity only needs to be clear The physical position of the LED lights, so that a normal camera or mobile phone can act as a calibration camera, reducing the cost of the calibration device. In addition, since the pixels in the LED module have been optically corrected at the factory, the brightness of the pixels in the LED module is relatively uniform. Therefore, the above correction method is performed only by the boundary of the LED module. , greatly reducing the amount of data analysis, thereby improving the speed of correction. And, since the correction coefficient is calculated based on the spatial uniformity, the correction can be performed even when the LED display is normally displayed, and the LED display screen is not required to display a specific corrected image (for example, a red, green, and blue solid image), real-time correction is realized. .

Brief description of the drawing

DRAWINGS

1 is a flow chart of a method for correcting a whole screen of an LED display screen according to an embodiment of the present invention;

2 is a flowchart of a method for correcting a whole screen of an LED display screen according to still another embodiment of the present invention;

3 is a schematic view showing a splicing structure of an LED display screen;

4 is a flowchart of a method for correcting a whole screen of an LED display screen according to still another embodiment of the present invention;

5 is a structural diagram of a frame of a full screen correction system for an LED display screen according to an embodiment of the present invention.

Invention embodiment Embodiments of the invention

In order to facilitate the understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the invention are given in the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be more fully understood.

[0040] It is to be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not meant to be the only embodiments.

[0041] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

1 is a flow chart showing a method for correcting a whole screen of an LED display screen according to an embodiment of the present invention, wherein the whole screen correction method of the LED display screen is applied to an LED display screen formed by splicing a plurality of LED modules. The correction, in particular, is suitable for the correction of the LED display formed by the splicing of the LED module with good optical uniformity in the module, and the correction effect is good.

[0043] As shown in FIG. 1, the method for correcting the entire screen of the LED display screen comprises the following steps:

[0044] S102: Acquire a full screen image of the LED display screen.

[0045] In order to realize the correction of the LED full screen, it is necessary to obtain a full screen image including the entire LED display screen through the camera, and then perform image analysis on the entire screen image, thereby obtaining various parameters required for calculating the correction coefficient, and utilizing After the parameters are calculated and the correction factor is applied to the LED display, the full screen correction of the L ED display can be completed.

[0046] In some embodiments, the full screen image of the LED display screen can be acquired by a cell phone or a conventional camera. Of course, the images obtained by the professional camera are clearer, which is advantageous for the analysis of the image, so that the obtained parameters are more accurate, and the accuracy of the correction coefficient can be improved.

[0047] It can be understood by those skilled in the art that in order to facilitate image analysis of a full screen image, the LED display The larger the area ratio of the screen in the whole screen image, the better the image analysis. Ideally, the four corners of the photo captured by the camera overlap with at least two of the four corners of the front view image of the LED display.

[0048] S104: Determine a boundary pixel point of the LED module according to the acquired full screen image, and obtain a spatial uniformity parameter of the boundary pixel.

[0049] In some embodiments, the LED display screen is formed by splicing a plurality of LED modules, so that a row or column of LEDs adjacent to the junction of the LED module and the adjacent LED module are at the junction with the adjacent LED module. There is a splicing line between the adjacent row or column of LEDs. The image analysis software can easily identify the splicing line, and then identify the boundary pixel points of each LED module, and obtain the spatial uniformity parameter corresponding to each boundary pixel. After that, the correction coefficient when the boundary pixel is corrected for the entire screen can be calculated.

[0050] Since only the position of the splicing line needs to be determined, the position of the boundary pixel point can be determined, and after obtaining the spatial uniformity parameter corresponding to the boundary pixel point, the corresponding correction coefficient can be calculated, that is, the obtained whole As long as the screen image can clearly identify the position of the splicing line, it is not necessary to analyze the brightness uniformity of all the LEDs of the LED display. Therefore, as long as the ordinary camera or even the mobile phone is used to take a full-screen image obtained by photographing, Satisfying the above conditions, compared with the prior art using a professional camera, greatly reduces the cost of the calibration device, and the convenience of operation.

[0051] In a specific embodiment, the control system of the calibration camera and the LED display screen is connected by wireless communication. When the correction camera captures the entire screen image of the LED display screen, the entire screen image is wirelessly transmitted to complete the screen. The image is transmitted to the control system of the LED display screen. After receiving the full screen image, the control system recognizes the boundary pixel points in the image, and then obtains a set of correction coefficients. The wireless communication connection may be a WLA N connection or a Bluetooth connection. Of course, other wireless connection modes may also be used, and no specific limitation is imposed herein.

[0052] With continued reference to FIG. 2, in some embodiments, the obtaining spatial uniformity parameters of the boundary pixel points includes:

[0053] S1041: Acquire location information of a boundary pixel point;

[0054] S1043: determining, according to position information of the pixel point, positions of four corrected pixel points adjacent to the boundary pixel point;

[0055] S1045: Calculating a distance between the boundary pixel and the four corrected pixels based on image analysis, D1, D2

D3 and D4; [0056] Please continue to refer to FIG. 3. FIG. 3 exemplarily shows a partial full-screen image. The information of the boundary pixel points can be determined according to the stitching line, and four corrected pixel points are determined according to the position of the boundary pixel points. One of the diagonals of the quadrilateral formed by the corrected pixel is parallel to the edge line of the LED module. After determining the four corrected pixel points, the distances D1, D2, D3, and D4 between the four corrected pixel points and the corresponding boundary pixel points are respectively calculated, that is, the spatial uniformity parameter of the boundary pixel points is obtained. Ideally, after the LED modules are spliced, the edge lines of the two spliced LED modules are parallel to each other, so that the diagonal lines of the quadrilateral formed by the four corrected pixels are perpendicular to each other, and the focal point of the diagonal is the boundary pixel. .

[0057] In some embodiments, the distances D1, D2, D3, and D4 between the boundary pixel points and the four corrected pixel points are directly obtained by image analysis. After analyzing the whole screen image, the distance between the boundary pixel and the four corrected pixels can be obtained, and the distance value is directly substituted into the preset algorithm, and the correction coefficient corresponding to the boundary pixel can be obtained.

[0058] In other embodiments, the distances D1, D2, D3, and D4 between the boundary pixel and the four corrected pixel points are between the boundary pixel points and the four corrected pixel points obtained by image analysis. The distance value is corrected. When a camera is manually operated to correct a camera (such as a mobile phone), the camera may have a certain tilt, which causes the boundary pixels to deviate from the distances D1, D2, D3, and D4 between the four corrected pixels. Therefore, it is necessary to The distance between the boundary pixel obtained by the image analysis and the four corrected pixels is corrected, thereby obtaining more accurate spatial uniformity parameters D1, D2, D3 and D4.

[0059] In some specific embodiments, the correcting the distance value between the boundary pixel point and the four corrected pixel points obtained by the image analysis specifically includes: correcting boundary pixel points and four according to image analysis The closeness of the distance value between the pixels is corrected.

[0060] In the LED display screen, the distance between a specific boundary pixel and the four corrected pixel points is determined, and at least two of the four boundary pixel points are in the same LED module as the boundary pixel point. Therefore, at least two of the distance values between a specific boundary pixel and the four corrected pixels are equal, and are equal to the pixel pitch D in the LED module where the boundary pixel is located, and thus, obtained from image analysis At least two relatively similar values may be determined in the distance value between the boundary pixel and the four corrected pixel points, and the offset direction and angle of the corrected camera are determined according to the determined similar values, thereby obtaining boundary pixels for image analysis. The point is corrected for the distance between the four corrected pixels.

[0061] S106: obtaining a correction coefficient according to a preset algorithm by a pixel lattice uniformity parameter between the LED modules. [0062] Referring to FIG. 4, in some embodiments, the pixel matrix spatial uniformity parameter between the LED modules is obtained according to a preset algorithm, and the correction coefficients are:

[0063] S1061: Obtain a pixel spacing D in the module of the LED module where the boundary pixel is located.

[0064] The intra-module pixel pitch D of the LH) module is determined at the factory. Therefore, in some embodiments, the pixel pitch D in the module of the LED module where the boundary pixel is located can be directly read. Of course, in some other embodiments, image analysis can also be performed to calculate the pixel pitch in the module of the LED module where the boundary pixel is located.

D.

[0065] S1063: according to the pixel spacing D in the module and the distance D1 between the boundary pixel point and the four corrected pixel points

, D2, D3 and D4 calculate the correction factor.

[0066] In some embodiments, the preset algorithm is:

[0067] Correction coefficient = (D1 + D2) * (D3 + D4) / (4 * D * D).

[0068] S108: using the correction coefficient for the LED display screen for full screen correction.

[0069] After determining the position of a boundary pixel point, the corresponding correction coefficient may be calculated according to the foregoing preset algorithm, and after calculating all the boundary relativism, a set of correction coefficients are obtained, and the correction coefficient is applied to the LED display screen. A full screen correction of the LED display can be achieved.

[0070] The above-mentioned full screen correction method of the LED display screen calculates the correction coefficient based on the spatial uniformity instead of the prior art calculation of the correction coefficient based on the optical uniformity, and only needs to clarify the physical position of each LED lamp due to the analysis of the spatial uniformity. Therefore, a normal camera or a mobile phone can serve as a correction camera, which reduces the cost of the calibration device. In addition, since the pixels in the LED module have been optically corrected at the factory, the brightness of the pixels in the L ED module is relatively uniform. Therefore, the above correction method is performed only for the boundary of the LED module. Analysis greatly reduces the amount of data analysis, which improves the speed of calibration. And, since the correction coefficient is calculated based on the spatial uniformity, the correction can be performed even when the LED display is normally displayed, and the LED display screen is not required to display a specific corrected image (for example, a red, green, and blue solid image), real-time correction is realized. .

Referring to FIG. 5, an embodiment of the present invention further provides a full screen correction system 10 for an LED display screen, including an acquisition component 110, an image analysis component 120, and a calculation component 130. The full screen correction system of the LED display can be a complete device or a component of a large system.

[0072] The acquiring component 110 is configured to acquire a full screen image of the LED display screen. [0073] In order to realize the correction of the entire screen of the LED, it is necessary to obtain a full-screen image including the entire LED display screen through the camera, and then perform image analysis on the entire screen image, thereby obtaining various parameters required for calculating the correction coefficient, and utilizing After the parameters are calculated and the correction factor is applied to the LED display, the full screen correction of the L ED display can be completed.

[0074] In some embodiments, the full screen image of the LED display screen can be acquired by a cell phone or a normal camera. Of course, the images obtained by the professional camera are clearer, which is advantageous for the analysis of the image, so that the obtained parameters are more accurate, and the accuracy of the correction coefficient can be improved.

[0075] It can be understood by those skilled in the art that in order to facilitate image analysis of a full-screen image, the larger the area ratio of the LED display screen in the full-screen image is, the more advantageous the image analysis is, and ideally, the camera captures The four corners of the photo overlap with at least two of the four corners of the front view image of the LED display.

[0076] The image analyzing component 120 is configured to determine a boundary pixel point of the LED module according to the acquired full screen image, and obtain a spatial uniformity parameter of the boundary pixel point;

[0077] In some embodiments, the LED display screen is formed by splicing a plurality of LED modules, so that a row or column of LEDs adjacent to the junction of the LED module and the adjacent LED module are at the junction with the adjacent LED module. There is a splicing line between the adjacent row or column of LEDs. The image analysis software can easily identify the splicing line, and then identify the boundary pixel points of each LED module, and obtain the spatial uniformity parameter corresponding to each boundary pixel. After that, the correction coefficient when the boundary pixel is corrected for the entire screen can be calculated.

[0078] Since only the position of the splicing line needs to be determined, the position of the boundary pixel point can be determined, and after obtaining the spatial uniformity parameter corresponding to the boundary pixel point, the corresponding correction coefficient can be calculated, that is, the obtained whole As long as the screen image can clearly identify the position of the splicing line, it is not necessary to analyze the brightness uniformity of all the LEDs of the LED display. Therefore, as long as the ordinary camera or even the mobile phone is used to take a full-screen image obtained by photographing, Satisfying the above conditions, compared with the prior art using a professional camera, greatly reduces the cost of the calibration device, and the convenience of operation.

[0079] In a specific embodiment, the control system of the calibration camera and the LED display screen is connected by wireless communication. When the calibration camera captures the entire screen image of the LED display screen, the entire screen image is wirelessly transmitted to complete the screen. The image is transmitted to the control system of the LED display screen. After receiving the full screen image, the control system recognizes the boundary pixel points in the image, and then obtains a set of correction coefficients. The wireless communication connection may be a WLA N connection or a Bluetooth connection. Of course, other wireless connection methods may also be used, and no specific limitation is imposed herein. System.

[0080] In some embodiments, the image analysis component 120 includes:

a position obtaining component 121, configured to acquire position information of a boundary pixel, and determine a position of four corrected pixel points adjacent to the boundary pixel according to position information of the pixel; and

[0082] The measuring component 123 is configured to calculate distances D1, D2, D3, and D4 between the boundary pixel and the four corrected pixels.

[0083] The information of the boundary pixel points can be determined according to the splicing line, and four corrected pixel points are determined according to the position of the boundary pixel point, and one of the four quadrilaterals formed by the corrected pixel points is parallel to the LED module. The edge line. After determining the four corrected pixel points, the distances D1, D2, D3, and D4 between the four corrected pixel points and the corresponding boundary pixel points are respectively calculated, that is, the spatial uniformity parameter of the boundary pixel points is obtained. Ideally, after the LED modules are spliced, the edge lines of the two spliced LED modules are parallel to each other, so that the diagonal lines of the quadrilateral formed by the four corrected pixels are perpendicular to each other, and the focal point of the diagonal is the boundary pixel.

[0084] In some embodiments, the distances D1, D2, D3, and D4 between the boundary pixel points and the four corrected pixel points are directly obtained by image analysis. After analyzing the whole screen image, the distance between the boundary pixel and the four corrected pixels can be obtained, and the distance value is directly substituted into the preset algorithm, and the correction coefficient corresponding to the boundary pixel can be obtained.

[0085] In other embodiments, the distances D1, D2, D3, and D4 between the boundary pixel and the four corrected pixel points are between the boundary pixel points and the four corrected pixel points obtained by image analysis. The distance value is corrected. When a camera is manually operated to correct a camera (such as a mobile phone), the camera may have a certain tilt, which causes the boundary pixels to deviate from the distances D1, D2, D3, and D4 between the four corrected pixels. Therefore, it is necessary to The distance between the boundary pixel obtained by the image analysis and the four corrected pixels is corrected, thereby obtaining more accurate spatial uniformity parameters D1, D2, D3 and D4.

[0086] In some specific embodiments, the correcting the distance value between the boundary pixel point and the four corrected pixel points obtained by the image analysis specifically includes: correcting boundary pixel points and four according to image analysis The closeness of the distance value between the pixels is corrected.

[0087] In the LED display screen, the distance between a specific boundary pixel and the four corrected pixel points is determined, and three of the four boundary pixel points are in the same LED module as the boundary pixel point, Thus a special Three of the distance values between the fixed boundary pixel and the four corrected pixel points are equal and equal to the pixel pitch D in the LED module where the boundary pixel is located. Therefore, the boundary pixel points and image values obtained from the image analysis are Three relatively close values can be determined from the distance values between the corrected pixels, and the offset direction and angle of the corrected camera are determined according to the determined three similar values, thereby obtaining boundary pixel points and four for image analysis. Correct the distance value between the pixels.

[0088] The calculating component 130 is configured to obtain a correction coefficient according to a preset algorithm.

[0089] The preset algorithm is:

[0090] Correction coefficient = (D1 + D2) * (D3 + D4) / (4 * D * D).

[0091] wherein D is a pixel spacing within the module of the LED module where the boundary pixel is located.

[0092] The intra-module pixel pitch D of the LH) module is determined at the time of shipment. Therefore, in some embodiments, the pixel pitch D in the module of the LED module in which the boundary pixel is located can be directly read. Of course, in some other embodiments, image analysis can also be performed to calculate the pixel pitch D in the module of the LED module where the boundary pixel is located.

[0093] After determining the position of a boundary pixel point, the corresponding correction coefficient may be calculated according to the foregoing preset algorithm, and after calculating all the boundary relativism, a set of correction coefficients are obtained, and the correction coefficient is applied to the LED display screen. A full screen correction of the LED display can be achieved.

[0094] The above-mentioned full screen correction system 10 of the LED display screen calculates the correction coefficient based on the spatial uniformity, instead of calculating the correction coefficient based on the optical uniformity in the prior art, since it is only necessary to clarify the physicality of each LED lamp due to the analysis of the spatial uniformity. Position, so a normal camera or mobile phone can act as a correction camera, reducing the cost of the calibration device. In addition, since the pixels in the LED module have been optically corrected at the factory, the brightness of the pixels in the LED module is relatively uniform. Therefore, the above correction method is performed only by the boundary of the LED module. , greatly reducing the amount of data analysis, thereby improving the speed of correction. And, since the correction coefficient is calculated based on the spatial uniformity, the correction can be performed even when the LED display is normally displayed, and the LED display screen is not required to display a specific corrected image (for example, a red, green, and blue solid image), real-time correction is realized. .

An embodiment of the present invention further provides a machine readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the LED display screen of any of the above embodiments. Screen correction method. [0096] The integrated screen correction system 10/computer device integrated component/module/unit of the LED display screen can be stored in a computer readable if it is implemented in the form of a software functional unit and sold or used as a standalone product. In the storage medium. Based on such understanding, the present invention implements all or part of the processes in the foregoing embodiments, and may also be completed by a computer program to instruct related hardware. The computer program may be stored in a computer readable storage medium. The steps of the various method embodiments described above may be implemented when the computer program is executed by the processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file, or some intermediate form. The computer readable storage medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read only memory (ROM, Read-Only)

Memory), Random Access Memory (RAM), electrical carrier signals, telecommunications signals, and software distribution media. It should be noted that the content contained in the computer readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in a jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, computer readable media Does not include electrical carrier signals and telecommunication signals

[0097] In the several embodiments provided by the present invention, it should be understood that the disclosed system and method may be implemented in other manners. For example, the system implementation described above is merely illustrative. For example, the division of the components is only a logical function division, and the actual implementation may have another division manner.

In addition, each functional module in each embodiment of the present invention may be integrated in the same processing module, or each module may exist physically separately, or two or more modules may be integrated in the same module. The above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.

[0099] It is apparent to those skilled in the art that the embodiments of the present invention are not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the embodiments of the present invention. Embodiments of the invention. Therefore, the embodiments are to be considered as illustrative and not restrictive, and the scope of the embodiments of the invention are defined by the appended claims instead All changes in the meaning and scope of the equivalent elements of the claims In the embodiment of the invention. Any reference signs in the claims should not be construed as limiting the claim. In addition, it is to be understood that the term "comprising" does not exclude other elements or steps. A plurality of units, modules or devices recited in the system, device or terminal claims may also be implemented by the same unit, module or device by software or hardware. The first, second, etc. words are used to denote names, and do not denote any particular order.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

Claim

[Claim 1] A method for correcting a full screen of an LED display screen, characterized in that the method comprises the following steps:

Obtain a full screen image of the LED display;

Determining boundary pixel points of the LED module according to the obtained full screen image, and obtaining spatial uniformity parameters of the boundary pixel points;

The correction coefficient is calculated according to a preset algorithm by a pixel lattice spatial uniformity parameter between the LED modules;

The correction factor is used for the LED display to perform full screen correction.

[Claim 2] The method for correcting the entire screen of the LED display screen according to claim 1, wherein the spatial uniformity parameter of the acquired boundary pixel includes:

Obtaining position information of boundary pixels;

Determining a position of four corrected pixel points adjacent to the boundary pixel point according to position information of the pixel point;

Calculate the distance between the boundary pixel and the four corrected pixels based on image analysis Dl, D2

, D3 and D4;

Wherein, one of the four quadrilaterals formed by the corrected pixel points is parallel to the edge line of the L ED module.

[Claim 3] The method for correcting the entire screen of the LED display screen according to claim 2, wherein the pixel matrix spatial uniformity parameter between the LED modules is corrected according to a preset algorithm, including:

Obtaining the pixel spacing D in the module of the LED module where the boundary pixel is located;

The correction coefficient is calculated according to the pixel pitch D in the module and the distances D 1 , D2 , D3 and D4 between the boundary pixel and the four corrected pixels.

The method for correcting the entire screen of the LED display screen according to claim 3, wherein the acquiring the pixel pitch D in the module of the LED module where the boundary pixel is located comprises: calculating boundary pixels based on image analysis The pixel spacing D in the module of the LED module where the point is located; or the pixel spacing D in the preset module.

[Claim 5] The full screen correction method of the LED display screen according to claim 3, wherein the distances D1, D2, D3, and D4 between the boundary pixel points and the four corrected pixel points are directly from the image Analyzed; or

The distances D1, D2, D3, and D4 between the boundary pixel points and the four corrected pixel points are corrected by the distance values between the boundary pixel points and the four corrected pixel points obtained for image analysis.

[Claim 6] The method for correcting the entire screen of the LED display screen according to claim 5, wherein the correction of the distance value between the boundary pixel point and the four corrected pixel points obtained by the image analysis includes : Corrected based on the closeness of the distance between the boundary pixel obtained from the image analysis and the four corrected pixels.

The method for correcting a whole screen of an LED display screen according to any one of claims 3 to 6, wherein the preset algorithm is: a correction coefficient = (D1 + D2) * (D3 + D4) / (4*D*D).

[Claim 8] A full screen correction system for an LED display screen, comprising:

Obtaining a component for acquiring a full screen image of the LED display;

An image analyzing component, configured to determine a boundary pixel of the LED module according to the obtained full screen image, and obtain a spatial uniformity parameter of the boundary pixel; and

A calculation component for obtaining a correction coefficient according to a preset algorithm.

[Claim 9] The full screen correction system of the LED display screen according to claim 8, wherein the image analysis component comprises:

a position acquisition component, configured to acquire position information of the boundary pixel, and determine a position of the four corrected pixel points adjacent to the boundary pixel according to the position information of the pixel; and a calculation component, configured to calculate the boundary pixel The distance between the four corrected pixels Dl, D

2. D3 and D4.

[Claim 10] A machine-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements a full screen of the LED display screen according to any one of claims 1 to 7. Correction method.