An LED display screen correction method, system, device and electronic equipment

Abstract

Embodiments of the present application provide an LED display screen correction method, system, device and electronic equipment, by collecting the corresponding relationship between the display parameters and the target shooting parameters in advance, after obtaining the display parameters of the display screen to be corrected, the target shooting parameters of the camera corresponding to the display screen to be corrected can be matched from the corresponding relationship set, so that the initial shooting parameters of the camera can be directly adjusted to the target shooting parameters, thereby improving the efficiency of adjusting the camera shooting parameters, and further improving the efficiency of correcting the display screen. At the same time, the adjusted camera can accurately collect the image information of the display screen, and also ensures the accuracy of correcting the display screen to be corrected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display screens, and in particular to an LED display screen correction method, system, device and electronic equipment. BACKGROUND

[0002] With the continuous development of the color display industry, display screens have been widely used in people's lives. However, there may be process differences in the manufacturing process of display screens, resulting in poor image quality displayed on the display screen. Therefore, in order to ensure the quality of the image on the display screen, the display screen usually needs to be corrected.

[0003] At present, the correction process of the display screen usually includes: first acquiring image information of the display screen through a camera, and then correcting the display screen to be corrected based on the image information. In practice, the camera shooting parameters configured when acquiring image information of different display screens are also different, so before correcting the display screen based on the image information of the display screen, the camera shooting parameters need to be adjusted according to the related parameter information of the display screen, so as to ensure that more accurate image information of the display screen can be acquired. In related technologies, the initial shooting parameters of the camera are adjusted multiple times according to manual experience until the camera after adjustment can accurately acquire the image information of the display screen, ensuring the accuracy of the correction result of the display screen.

[0004] However, the efficiency of adjusting the camera shooting parameters according to the related parameter information of the display screen in related technologies is low, resulting in low efficiency of correcting the display screen. SUMMARY

[0005] The embodiments of the present application provide an LED display screen correction method, system, device and electronic equipment, which can improve the efficiency of adjusting the camera shooting parameters, and further improve the efficiency of correcting the display screen.

[0006] The embodiments of the present application provide an LED display screen correction method, system, device and electronic equipment, which can improve the efficiency of adjusting the camera shooting parameters, and further improve the efficiency of correcting the display screen.

[0007] The display parameters of the display screen to be corrected are acquired; the corresponding relationship set is determined according to the corresponding relationship set constructed in advance, and the target shooting parameters of the camera corresponding to the display screen to be corrected are determined, wherein the corresponding relationship set includes the corresponding relationship between the display parameters and the target shooting parameters; the target shooting parameters are the parameters configured by the camera when shooting the image on the display screen to be corrected during the correction of the display screen to be corrected; the initial shooting parameters of the camera are adjusted to the target shooting parameters; and the display screen to be corrected is corrected based on the image obtained by shooting the display screen to be corrected by the camera after adjustment.

[0008] In a possible implementation, the display parameter of the display screen to be corrected includes spacing information of the lamp beads on the display screen to be corrected and brightness information of the display screen to be corrected; and the target shooting parameter includes an aperture size, an exposure time, a focal length size, a focus ring coordinate, and a shooting distance.

[0009] In a possible implementation, the construction process of the correspondence relationship set includes:

[0010] obtaining first image information of a plurality of display screens to be corrected collected by the camera; the display parameters of the display screens to be corrected are different; determining target shooting parameters of the camera corresponding to each of the display screens to be corrected based on image parameters of the first image information of each of the display screens to be corrected; generating a plurality of correspondence relationships based on the display parameters of each of the display screens to be corrected and the target shooting parameters; and generating a correspondence relationship set based on the plurality of correspondence relationships.

[0011] In a possible implementation, after the correspondence relationship set is generated based on the plurality of correspondence relationships, the method further includes:

[0012] storing the correspondence relationship set in a camera parameter database.

[0013] In a possible implementation, the target shooting parameters of the camera corresponding to the display screen to be corrected are determined according to the pre-constructed correspondence relationship set, and the method includes:

[0014] determining the target shooting parameters of the camera corresponding to the display screen to be corrected from the camera parameter database based on the display parameter of the display screen to be corrected.

[0015] In a possible implementation, the target shooting parameters of the camera corresponding to each of the display screens to be corrected are determined based on the image parameters of the first image information of each of the display screens to be corrected, and the method includes:

[0016] calculating, based on the first image information, an imaging quantitative value and a brightness value of the lamp beads on each of the display screens to be corrected respectively; and if the imaging quantitative value and the brightness value both satisfy a preset condition, determining the current shooting parameter of the camera as the target shooting parameter of the camera corresponding to the display screen to be corrected.

[0017] In a possible implementation, the method further includes:

[0018] if the imaging quantitative value or the brightness value does not satisfy the preset condition, adjusting the initial shooting parameter of the camera, and repeating the steps of the construction process of the correspondence relationship set.

[0019] In a possible implementation, the display screen to be corrected is corrected based on an image obtained by shooting the display screen to be corrected by the camera after the initial shooting parameter of the camera is adjusted, and the method includes:

[0020] The adjusted camera is controlled to collect first image information of the display screen to be corrected, and current imaging quantization values and current brightness values of the lamp beads on the display screen to be corrected are calculated based on the first image information; if the current imaging quantization values and the current brightness values both satisfy preset conditions, the adjusted camera is controlled to collect second image information of the display screen to be corrected, and the display screen to be corrected is corrected based on the second image information.

[0021] In a possible implementation, the method further includes:

[0022] If the imaging quantization values or the brightness values do not satisfy the preset conditions, the corresponding relationship set is updated.

[0023] According to the pre-constructed corresponding relationship set, target shooting parameters of the camera corresponding to the display screen to be corrected are determined, including:

[0024] According to the updated corresponding relationship set, target shooting parameters of the camera corresponding to the display screen to be corrected are determined.

[0025] In a possible implementation, the method further includes:

[0026] The camera shooting parameters are displayed on a preset display interface.

[0027] Another aspect of the embodiment of the application provides an LED display screen correction system, which includes a correction system and a display screen system, the correction system includes a computer device and a camera, and the display screen system includes a display screen to be corrected.

[0028] The camera is configured to collect image information of the display screen to be corrected, and the image information includes first image information and second image information.

[0029] The computer device is configured to invoke computer program instructions stored in the memory, and execute the instructions to implement the method steps in any embodiment of the LED display screen correction method.

[0030] In a possible implementation, the display screen system further includes a display screen control device, and the computer device is in communication connection with the display screen control device.

[0031] The computer device is further configured to control the display screen to be corrected to display the image information through the display screen control device.

[0032] Another aspect of the embodiment of the application provides an LED display screen correction device, which includes:

[0033] The first acquisition module is configured to acquire display parameters of the display screen to be corrected.

[0034] The first determining module is configured to determine a target shooting parameter of a camera corresponding to the display screen to be corrected according to a pre-constructed corresponding relationship set, wherein the corresponding relationship set comprises a corresponding relationship between a display parameter and the target shooting parameter; and the target shooting parameter is a parameter configured for the camera when shooting an image on the display screen to be corrected.

[0035] The adjusting module is configured to adjust the initial shooting parameter of the camera to the target shooting parameter.

[0036] The correcting module is configured to correct the display screen to be corrected based on an image obtained by shooting the display screen to be corrected by the camera after the adjustment.

[0037] Another aspect of the embodiments of the present application provides an electronic device, comprising:

[0038] A processor;

[0039] A memory for storing processor-executable instructions;

[0040] The processor is configured to read the executable instructions from the memory and execute the instructions to implement the method steps in any of the embodiments of the LED display screen correction method.

[0041] The technical solutions provided by the embodiments of the present application can achieve at least the following beneficial effects:

[0042] The LED display screen correction method, system, device and electronic device provided by the embodiments of the present application can pre-construct a corresponding relationship set between a display parameter and a target shooting parameter, so that after obtaining the display parameter of the display screen to be corrected, the target shooting parameter of the camera corresponding to the display screen to be corrected can be matched from the corresponding relationship set, and then the initial shooting parameter of the camera can be directly adjusted to the target shooting parameter, thereby improving the efficiency of adjusting the shooting parameter of the camera and further improving the efficiency of correcting the display screen. Meanwhile, the image information of the display screen can be accurately collected by the adjusted camera, and the accuracy of correcting the display screen to be corrected is also ensured. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is a flowchart of an LED display screen correction method according to an exemplary embodiment of the present application;

[0044] Figure 2 is a schematic diagram of a display interface according to an exemplary embodiment of the present application;

[0045] Figure 3 is a flowchart of constructing a corresponding relationship set according to an exemplary embodiment of the present application;

[0046] Figure 4is a schematic diagram of a monochrome image according to an example embodiment of the present application;

[0047] Figure 5 is a schematic diagram of a minimum circumscribed rectangle of an imaging diagram of a lamp bead according to an example embodiment of the present application;

[0048] Figure 6 is a schematic diagram of an image captured by a camera according to an example embodiment of the present application;

[0049] Figure 7 is a schematic diagram of a luminance distribution histogram according to an example embodiment of the present application;

[0050] Figure 8 is a schematic diagram of an application environment of an LED display screen correction method according to an example embodiment of the present application;

[0051] Figure 9 is a schematic diagram of an overall architecture of adjusting initial camera shooting parameters according to an example embodiment of the present application;

[0052] Figure 10 is a block diagram of an LED display screen correction system according to an example embodiment of the present application;

[0053] Figure 11 is a block diagram of an LED display screen correction system according to another example embodiment of the present application;

[0054] Figure 12 is a schematic diagram of an LED display screen correction device according to an example embodiment of the present application;

[0055] Figure 13 is a schematic diagram of an electronic device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0056] The example embodiments will be described in detail herein with reference to the attached drawings. In the following description, the same numbers are used to designate the same elements, unless otherwise indicated. The embodiments described in the following example embodiments are not meant to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0057] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the present application and the appended claims, the singular forms "a," "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0058] It should be understood that, although the terms first, second, third, etc. can be employed in this application to describe various information, the information should not be limited to these terms. These terms are only used to differentiate one piece of information from another. For example, without departing from the scope of the application, the first information can also be called the second information, and similarly, the second information can also be called the first information. Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon" or "in response to determining".

[0059] The prior art adjusts the shooting parameters of the camera by first collecting image information of the display screen by the camera with the initial shooting parameters set, then judging the image parameters of the collected image information. If the image parameters do not meet the preset conditions, the user needs to manually adjust the initial shooting parameters of the camera according to experience, then continues to collect image information of the display screen by the adjusted camera, and again judges the image parameters of the collected image information. If the image parameters still do not meet the preset conditions, the above process is repeatedly continued until the image parameters meet the preset conditions, and the current camera shooting parameters are taken as the target shooting parameters of the camera. However, this way of adjusting the camera shooting parameters is low in efficiency, and thus reduces the efficiency of correcting the display screen.

[0060] Therefore, the embodiments of the present application provide an LED display screen correction method, system, device and electronic equipment. By collecting the display parameters of the display screen to be corrected, the corresponding relationship set between the display parameters and the target shooting parameters of the camera can be matched to obtain the target shooting parameters of the camera corresponding to the display screen to be corrected. Thus, the initial shooting parameters of the camera can be directly adjusted to the target shooting parameters, which improves the efficiency of adjusting the camera shooting parameters, and further improves the efficiency of correcting the display screen. Meanwhile, the adjusted camera can accurately collect the image information of the display screen, and also ensures the accuracy of correcting the display screen to be corrected.

[0061] The LED display screen correction method, system, device and electronic equipment of the embodiments of the present application are exemplarily described below in combination with the drawings.

[0062] The embodiments of the present application can be applied to terminal devices, computer systems, servers and other electronic devices, which can operate with many other general-purpose or special-purpose computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments, and / or configurations suitable for use with terminal devices, computer systems, servers and other electronic devices include, but are not limited to, personal computers, server computers, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputers, mainframe computers, and distributed cloud computing technology environments including any of the above systems, and the like.

[0063] The terminal devices, computer systems, servers and other electronic devices can be described in the general context of computer system-executable instructions, such as program modules, being executed by the computer system. Generally, program modules can include routines, programs, objects, components, logic, data structures, and the like, which perform particular tasks or implement particular abstract data types. The computer system / server can be implemented in a distributed cloud computing environment, in which tasks are performed by remote processing devices that are linked through a communications network. In a distributed cloud computing environment, program modules can be located in local or remote computer system storage media including storage devices.

[0064] Figure 1 FIG. 1 is a flow diagram of an LED display screen correction method according to an example embodiment of the present application. As shown in FIG. 1, the method can include the following steps: Figure 1

[0065] Step 102, obtaining display parameters of a display screen to be corrected.

[0066] For the convenience of description, the display screen to be corrected (i.e. the display screen to be corrected by the embodiments of the present application) and the display screen to be corrected used to build the corresponding relationship set hereinafter are distinguished, and the display screen to be corrected here is referred to as the first display screen to be corrected, and the display screen to be corrected used to build the corresponding relationship set hereinafter is referred to as the second display screen to be corrected.

[0067] ​The display parameters of the first display screen to be calibrated are the inherent product parameters of the display screen. It can be understood that the first display screen to be calibrated can be an LED display screen, which typically includes multiple LEDs arranged in an array, with a certain spacing between each LED, and each LED has corresponding brightness information. Therefore, the display parameters of the first display screen to be calibrated can include the spacing information of the LEDs on the first display screen and the brightness information of the first display screen to be calibrated. The brightness information of the first display screen to be calibrated can be determined based on the average brightness of all LEDs on the first display screen, or based on the median brightness value of all LEDs on the first display screen, or based on the mode of the brightness values ​​of all LEDs on the first display screen, or other methods. This application embodiment does not specifically limit the method for determining the brightness information of the first display screen to be calibrated. Of course, the display parameters of the first display screen to be calibrated can also include other types of display parameters, and this application embodiment does not specifically limit this.

[0068] Typically, the spacing information of the LEDs on the first display screen to be calibrated can be, but is not limited to, any one of 2.0mm, 1.5mm, and 1.2mm, and the brightness information of the first display screen to be calibrated can be, but is not limited to, 500cd / m². 2 600cd / m 2 Any one of them, where cd / m 2 It is a unit of brightness, expressed as candela per square meter.

[0069] Step 104: Determine the target shooting parameters of the camera corresponding to the display screen to be calibrated based on the pre-constructed correspondence set. The correspondence set includes the correspondence between the display parameters of the display screen to be calibrated and the target shooting parameters. The target shooting parameters are the parameters configured by the camera to capture images on the display screen to be calibrated when calibrating the display screen.

[0070] The correspondence set is a pre-constructed set of correspondences between the display parameters of the second display screen to be calibrated and the target shooting parameters of the camera. This set includes the correspondence between the display parameters of the first display screen to be calibrated and the target shooting parameters. The target shooting parameters of the camera may include aperture size, exposure time, focal length, focus ring coordinates, and shooting distance; other types of target shooting parameters may also be included, but this embodiment does not specifically limit their inclusion.

[0071] In the correspondence set, the display parameters of each second display screen to be corrected and the target shooting parameters of the camera can be a set of display parameters corresponding to a set of target shooting parameters. The set of display parameters can include the spacing information of the lamp beads on the second display screen to be corrected and the brightness information of the second display screen to be corrected, and the set of target shooting parameters includes the aperture size, the exposure time, the focal length size, the focus ring coordinate, and the shooting distance.

[0072] In the correspondence set, the display parameters of each second display screen to be corrected and the target shooting parameters of the camera can also be a set of display parameters corresponding to a plurality of sets of target shooting parameters. The definition of the set of display parameters and the set of target shooting parameters is the same as defined above, and will not be repeated here. Specifically, when the value of any one of the target shooting parameters is changed, the other parameters can also be changed accordingly to meet the shooting conditions required by the display screen to be corrected, so that a set of display parameters can also correspond to a plurality of sets of target shooting parameters.

[0073] Exemplarily, the set of target shooting parameters includes the aperture size, the exposure time, the focal length size, the focus ring coordinate, and the shooting distance. When the shooting distance is changed, at least one of the aperture size, the exposure time, the focal length size, and the focus ring coordinate can also be changed accordingly, so that the set of target shooting parameters also meets the shooting conditions required by the display screen to be corrected.

[0074] After obtaining the display parameters of the first display screen to be corrected, the pre-constructed correspondence set can be obtained first, so as to match the target shooting parameters of the camera corresponding to the first display screen to be corrected according to the correspondence set. The pre-constructed correspondence set can be stored locally or in a database, and the present application embodiment does not make specific limitation thereto.

[0075] Optionally, after determining the target shooting parameters of the camera corresponding to the first display screen to be corrected, the target shooting parameters can also be output in the form of voice broadcast, text display, etc. Exemplarily, the camera shooting parameters can be displayed on a preset display interface, as shown in Figure 2 Figure 2 is a schematic diagram of a display interface provided by the present application embodiment. On the display interface, the display parameters of the first display screen to be corrected can be input, that is, the spacing information of the lamp beads on the display screen to be corrected and the brightness information of the display screen to be corrected can be input, so as to output the target shooting parameters. The display box corresponding to the target shooting parameters can also be set in the form of a drop-down box, so that one of the target shooting parameters can be changed at will, and when the target shooting parameter changes, the other displayed target shooting parameters will also change accordingly.

[0076] ​Of course, other information can also be displayed on the display interface, for example, a brightness histogram of the first display screen to be corrected, an imaging size of the lamp beads on the display screen to be corrected, etc. The imaging size of the lamp beads on the first display screen to be corrected represents the average value of the number of effective pixels occupied by all the lamp beads when imaging.

[0077] Step 106: adjusting the initial shooting parameter of the camera to the target shooting parameter.

[0078] The target shooting parameter of the camera corresponding to the first display screen to be corrected determined according to the correspondence set can be one group or multiple groups. If the target shooting parameter is one group, the initial shooting parameter of the camera can be directly adjusted to this group of target shooting parameters; if the target shooting parameter is multiple groups, a group of target shooting parameters can be randomly selected and the initial shooting parameter of the camera is adjusted to this group of target shooting parameters, or a group of target shooting parameters can be selected by experience and the initial shooting parameter of the camera is adjusted to this group of target shooting parameters, or other ways can be used to select a group of target shooting parameters, which are not limited in the embodiments of the present application.

[0079] In the case that there are multiple groups of target shooting parameters, flexible selection of the target shooting parameters can be realized. For example, for the camera, multiple aperture sizes are usually set, when one of the aperture sizes is randomly selected, other target shooting parameters corresponding to the aperture size can be obtained, including exposure time, focal length, focus ring coordinate and shooting distance. Thus, when a group of target shooting parameters is randomly selected, the flexibility of the camera in shooting the image information of the first display screen to be corrected is also improved.

[0080] When the initial shooting parameter of the camera is adjusted to the target shooting parameter, the camera can be controlled to automatically adjust the initial shooting parameter to the target shooting parameter by sending a first control instruction to the camera, or the initial shooting parameter of the camera can be manually adjusted to the target shooting parameter. When the initial shooting parameter of the camera is manually adjusted, the value of the target shooting parameter displayed on the preset display interface can be used for adjustment.

[0081] Step 108: correcting the display screen to be corrected based on the image obtained by adjusting the camera to shoot the display screen to be corrected.

[0082] Wherein, after adjusting the initial shooting parameter of the camera to the target shooting parameter, the second image information of the first display screen to be corrected can be directly collected by the adjusted camera, and the second image information can include three kinds of image information, i.e. pure red image information, pure blue image information and pure green image information. For each kind of monochromatic image information in the second image information, the brightness and chrominance information of each lamp bead on the first display screen to be corrected is analyzed, so as to generate a corresponding light chrominance compensation coefficient for each lamp bead, and finally the brightness and chrominance uniformity of each lamp bead is made consistent, so as to realize the correction of the first display screen to be corrected.

[0083] In the embodiment of the application, by pre-constructing the corresponding relationship set between the display parameter and the target shooting parameter, after obtaining the display parameter of the display screen to be corrected, the target shooting parameter of the camera corresponding to the display screen to be corrected can be matched from the corresponding relationship set, so that the initial shooting parameter of the camera can be directly adjusted to the target shooting parameter, the efficiency of adjusting the shooting parameter of the camera is improved, and the efficiency of correcting the display screen is further improved. Meanwhile, the image information of the display screen can be accurately collected by the adjusted camera, and the accuracy of correcting the display screen to be corrected is ensured.

[0084] Figure 3 is a flowchart of constructing a corresponding relationship set according to an exemplary embodiment of the application. As shown in Figure 3 The method can include the following steps:

[0085] In step 302, the first image information of a plurality of display screens to be corrected collected by the camera is obtained, and the display parameters of the display screens to be corrected are different.

[0086] Wherein, when constructing the corresponding relationship set, the target shooting parameter corresponding to the display parameter needs to be obtained for each of the plurality of different second display screens to be corrected, and thus the first image information of the plurality of second display screens to be corrected needs to be collected by the camera, and the display parameters of each of the second display screens to be corrected are different. It should be noted that for the plurality of second display screens to be corrected, if the display parameters of the second display screens to be corrected include a plurality of display parameters, then under the condition that at least one display parameter is different, it also means that the display parameters of the second display screens to be corrected are different.

[0087] When collecting the first image information of the second display screen to be corrected, a control instruction can be sent to the display screen controller according to the value of RGB input by the user, and the display screen controller controls the display screen to display the corresponding monochromatic image based on the control instruction. For example, if the value of RGB input by the user is (255, 0, 0), then the monochromatic image displayed by the display screen based on the control instruction is a pure red image.

[0088] Then, the second control instruction is sent to the camera to control the camera to capture the single-color image, and the above process is repeated after changing the value of the RGB, and then three single-color images are captured to obtain the first image information.

[0089] In step 304, the target shooting parameter of the camera corresponding to each display screen to be corrected is determined based on the image parameter of the first image information of each display screen to be corrected.

[0090] In the analysis of the first image information of each second display screen to be corrected, each single-color image needs to be analyzed respectively. Taking one single-color image as an example, the image parameter of the first image information can include the imaging quantization value and the brightness value of the lamp beads on the second display screen to be corrected, and the target shooting parameter of the camera corresponding to each second display screen to be corrected can be determined based on the imaging quantization value and the brightness value. Exemplarily, the imaging quantization value can be the imaging size.

[0091] Exemplarily, the imaging quantization value and the brightness value of the lamp beads on each second display screen to be corrected can be calculated based on the first image information. If the imaging quantization value and the brightness value both satisfy the preset condition, the current shooting parameter of the camera is determined as the target shooting parameter of the camera corresponding to the second display screen to be corrected. If the imaging quantization value or the brightness value does not satisfy the preset condition, the initial shooting parameter of the camera is adjusted, and the steps of the construction process of the corresponding relationship set are repeatedly executed.

[0092] The process of calculating the imaging quantization value of the lamp beads on each second display screen to be corrected is as follows:

[0093] In one single-color image, each lamp bead occupies a plurality of pixel points when imaging, as shown in Figure 4 , and Figure 4 is a schematic diagram of a single-color image provided by an embodiment of the present application. The left half part shows the entire single-color image, and the enlarged view of the area framed by the rectangular frame in the single-color image is the right half part indicated by the arrow, which shows that the area framed by the rectangular frame includes the imaging diagram of each lamp bead in the three-row five-column lamp bead array.

[0094] The imaging diagram of each lamp bead can be subjected to image preprocessing operation first, and then the minimum circumscribed rectangle of each lamp bead imaging diagram is calculated, as shown in Figure 5 , and Figure 5 The inner area of the rectangular frame in represents the imaging diagram of one lamp bead, and the rectangular frame represents the minimum circumscribed rectangle of the imaging diagram. The way of calculating the minimum circumscribed rectangle is not specifically limited. Exemplarily, the minimum circumscribed rectangle can be obtained by first calculating the contour information of the lamp bead imaging diagram, and then calculating the minimum circumscribed rectangle based on the contour information. Of course, the minimum circumscribed rectangle can also be obtained by other ways.

[0095] Then, the effective pixel points in the minimum circumscribed rectangle are traversed, and the number of the effective pixel points is taken as the imaging quantization value of the lamp bead, and the imaging quantization value of the lamp bead is recorded as Lij, wherein i represents the row of the lamp bead, and j represents the column of the lamp bead. The effective pixel points can be determined by a preset rule. For example, the preset rule can be set based on the brightness information of the pixel points, for example, the pixel points with a brightness value greater than a certain preset brightness threshold value are taken as the effective pixel points.

[0096] After the imaging quantization value of each lamp bead in the monochrome image is calculated in the above manner, the imaging quantization value L of the lamp bead on the second display screen to be corrected can be calculated by formula (1), that is, the imaging quantization value of the lamp bead on the second display screen to be corrected is the average value of the imaging sizes of all lamp beads.

[0097] L = (L00 + L01 + … + Lij) / (i * j) (1)

[0098] Wherein, L represents the imaging quantization value of the lamp bead on the second display screen to be corrected; L00 represents the imaging quantization value of the lamp bead in the 0th row and the 0th column; L01 represents the imaging quantization value of the lamp bead in the 0th row and the 1st column; Lij represents the imaging quantization value of the lamp bead in the ith row and the jth column; i*j represents the number of all lamp beads.

[0099] When judging whether the imaging quantization value of the lamp bead on the second display screen to be corrected satisfies the preset condition, the preset condition can be set to 50-100 according to artificial experience, for example. If the imaging quantization value is within the range, the current parameters of the lamp bead spacing, camera focal length, focus ring position, shooting distance, etc. on the second display screen to be corrected are recorded, and the current shooting parameters of the camera are determined as the target shooting parameters of the camera corresponding to the second display screen to be corrected. If the imaging quantization value is not within the range, the initial shooting parameters of the camera need to be adjusted, and the process of determining the target shooting parameters of the camera is repeated until the imaging quantization value falls within the set range.

[0100] For example, when adjusting the initial shooting parameters of the camera, the adjustment can be made by referring to the following manner: if the imaging quantization value is too small (i.e. less than the lower limit of the preset range), the focal length can be increased or the focus ring can be adjusted to the blur direction; on the contrary, if the imaging quantization value is too large (i.e. greater than the upper limit of the preset range), the focal length can be decreased or the focus ring can be adjusted to the clear direction.

[0101] In addition, the brightness value of the second display screen to be corrected can be represented by the maximum value in the brightness distribution histogram. The process of calculating the brightness value of the second display screen to be corrected is as follows:

[0102] Similarly, taking the first image information as an example of one monochrome image, since the region occupied by the first image information is a part of the image captured by the camera, the region coordinate of the second display screen to be corrected can be located by identifying the image captured by the camera, as shown in Figure 6 Figure 6 FIG. 3 is a schematic diagram of an image captured by the camera, and the region framed by the rectangular frame is the first image information corresponding to the second display screen to be corrected.

[0103] Optionally, when locating the region coordinate of the second display screen to be corrected, the image captured by the camera can be scanned, since the brightness of the pixel points on the first image information is greater than that of the pixel points on other regions, the region coordinate of the second display screen to be corrected can be determined based on the brightness values of the pixel points by scanning the image captured by the camera from top to bottom and from left to right.

[0104] Then, the number of pixel points of each brightness level in the first image information is counted to obtain a brightness distribution histogram corresponding to the first image information, as shown in Figure 7 Figure 7 FIG. 4 is a schematic diagram of a brightness distribution histogram provided by an embodiment of the present application, and 0 and 255 represent brightness levels.

[0105] Therefore, the maximum value in the brightness distribution histogram can be obtained by statistical analysis of the brightness distribution histogram, which represents the brightness value of the second display screen to be corrected. The maximum value also represents the maximum number of pixel points at a certain brightness level.

[0106] When determining whether the brightness value of the second display screen to be corrected meets the preset condition, the preset brightness value range can be used as an example for determination, for example, the brightness value range can be set as [100, 220]. If the maximum value in the brightness distribution histogram is within the brightness value range, the brightness value of the display screen to be corrected can be recorded by a brightness meter, the aperture size and the exposure time can be recorded, and the current shooting parameter of the camera can be determined as the target shooting parameter of the camera corresponding to the second display screen to be corrected. If the maximum value in the brightness distribution histogram is not within the brightness value range, the initial shooting parameter of the camera needs to be adjusted, and the process of determining the target shooting parameter of the camera is repeated until the maximum value in the brightness distribution histogram falls within the set brightness value range.

[0107] For example, when adjusting the initial shooting parameter of the camera, the following adjustment method can be used as a reference: if the maximum value in the brightness distribution histogram is too small (i.e., less than the lower limit of the brightness value range), the aperture of the camera can be increased or the exposure time can be increased; otherwise, if the maximum value in the brightness distribution histogram is too large (i.e., greater than the upper limit of the brightness value range), the aperture of the camera can be decreased or the exposure time can be decreased.​​

[0108] In step 306, a plurality of corresponding relationships are generated based on the display parameters of each display screen to be corrected and the target shooting parameters, and a corresponding relationship set is generated based on the plurality of corresponding relationships.

[0109] In the embodiment, for each different second display screen to be corrected, the target parameters corresponding to the display parameters of the second display screen to be corrected are determined, and then a plurality of corresponding relationships are generated based on the display parameters of each second display screen to be corrected and the target shooting parameters. After the plurality of corresponding relationships are combined, the corresponding relationship set is generated.

[0110] It should be noted that each corresponding relationship constructed can be a relationship in which a group of display parameters corresponds to a group of target shooting parameters, or a relationship in which a group of display parameters corresponds to a plurality of groups of target shooting parameters. It can be understood that the plurality of groups of target shooting parameters can be obtained by changing one parameter first and then adjusting other parameters so that the group of target shooting parameters also meets the shooting conditions required by the second display screen to be corrected, so that the plurality of groups of target shooting parameters are obtained.

[0111] In the embodiment, the first image information of the plurality of display screens to be corrected collected by the camera is obtained, the target shooting parameters of the camera corresponding to each display screen to be corrected are determined based on the image parameters of the first image information, and then the corresponding relationship set can be quickly and accurately generated.

[0112] In some other optional embodiments, the process of correcting the display screen to be corrected based on the image obtained by the adjusted camera shooting the display screen to be corrected can further include: after the initial shooting parameters of the camera are adjusted to the target shooting parameters, the first image information of the first display screen to be corrected is collected by the adjusted camera first, the current imaging quantization value and the current brightness value of the lamp beads on the first display screen to be corrected are calculated based on the first image information, if the current imaging quantization value and the current brightness value both meet the preset condition, the second image information of the first display screen to be corrected is collected by the adjusted camera, and the first display screen to be corrected is corrected based on the second image information.

[0113] The first image information can also include pure red, pure blue and pure green image information. For each single-color image information in the first image information, the current imaging quantization value and the current brightness value of the lamp bead on the first display screen to be corrected are calculated respectively. The current imaging quantization value is the imaging size of the lamp bead on the display screen to be corrected. Therefore, in the case that the current imaging quantization value and the current brightness value both satisfy the preset condition, it is indicated that the determined target shooting parameter is accurate, so that the first display screen to be corrected can be corrected based on the adjusted camera, and the specific correction process is not described again. By verifying the determined target shooting parameter, the accuracy of the set camera shooting parameter is ensured.

[0114] If the imaging quantization value or the brightness value does not satisfy the preset condition, the correspondence relationship set is updated, and the target shooting parameter of the camera corresponding to the first display screen to be corrected is determined according to the updated correspondence relationship set.

[0115] In the case that the imaging quantization value or the brightness value does not satisfy the preset condition, the target shooting parameter of the camera can be manually adjusted according to artificial experience. After adjustment, the first image information of the first display screen to be corrected is collected again, the current imaging quantization value and the current brightness value of the lamp bead on the first display screen to be corrected are calculated respectively, and it is judged whether the current imaging quantization value and the current brightness value both satisfy the preset condition. The above process is repeated until the current imaging quantization value and the current brightness value both satisfy the preset condition. The current shooting parameter is taken as the target shooting parameter of the camera, and the target shooting parameter corresponding to the display parameter of the first display screen to be corrected in the pre-constructed correspondence relationship set is updated.

[0116] By updating the pre-constructed correspondence relationship set, the accuracy of the constructed correspondence relationship is ensured, so that the accuracy of the set camera shooting parameter is ensured.

[0117] In some optional embodiments, after the above step 306, the correspondence relationship set can also be stored in the camera parameter database. The above step 104 includes determining the target shooting parameter of the camera corresponding to the display screen to be corrected from the camera parameter database based on the display parameter of the display screen to be corrected.

[0118] An application environment of the LED display screen correction method provided by the embodiments of the present application is as follows:

[0119] As shown in Figure 8 Figure 8 ​This diagram illustrates an application environment for an LED display screen calibration method provided in an embodiment of this application. The terminal 802 can communicate with a camera 804 and a display screen controller 806. The display screen controller 806 controls the display screen 808 to be calibrated, and the camera 804 acquires image information from the display screen 808. A camera parameter database 810 stores a set of corresponding relationships, which the terminal 802 can retrieve. It should be noted that the display screen 808 to be calibrated here is the aforementioned first display screen to be calibrated.

[0120] based on Figure 8 The application environment shown is illustrated in the overall architecture diagram for adjusting the initial shooting parameters of the camera. Figure 9 As shown. The display calibration software can be deployed on terminal 802. The user inputs the display parameters of the first display screen to be calibrated through the display interface provided by the software, including the spacing information of the LEDs on the first display screen and the brightness information of the first display screen. Based on the input display parameters, terminal 802 can obtain a corresponding set of relationships from the camera parameter database 810, and determine the target shooting parameters of the camera corresponding to the first display screen to be calibrated according to the corresponding set of relationships, which can be displayed on the display interface. Terminal 802 can send a first control command to the camera to control the camera to automatically adjust its initial shooting parameters to the target shooting parameters.

[0121] It should be understood that, although Figures 1-9 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 1-9 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0122] Figure 10 This is a block diagram illustrating an exemplary embodiment of an LED display calibration system according to this application. (Refer to...) Figure 10 The LED display calibration system is used to implement all or part of the functions of the aforementioned method embodiments. Specifically, the LED display calibration system includes a calibration system 1002 and a display system 1004. The calibration system 1002 includes a computer device 1002a and a camera 1002b, and the display system 1004 includes a display screen 1004a to be calibrated.

[0123] The camera 1002b is configured to collect image information of the display screen 1004a to be corrected, and the image information includes first image information and second image information.

[0124] The computer device 1002a is configured to invoke computer program instructions stored in the memory, and execute the instructions to implement the steps of the LED display screen correction method according to the above method embodiments.

[0125] The specific process and beneficial effects of the LED display screen correction system according to the embodiments of the present application when executed can be referred to the descriptions of the above LED display screen correction method embodiments, and will not be repeated here.

[0126] In some optional embodiments, Figure 11 is a block diagram of another LED display screen correction system according to an exemplary embodiment of the present application. Refer to Figure 11 The display screen system 1004 further includes a display screen control device 1004b, and the computer device 1002a is in communication connection with the display screen control device 1004b.

[0127] The computer device 1002a is further configured to control the display screen to be corrected 1004a to display image information through the display screen control device 1004b.

[0128] Figure 12 is a schematic diagram of an LED display screen correction device according to an exemplary embodiment of the present application. Refer to Figure 12 As shown in the figure, the device is configured to implement all or part of the functions of the above method embodiments. Specifically, the LED display screen correction device 1200 includes:

[0129] A first acquisition module 1202 is configured to acquire display parameters of a display screen to be corrected.

[0130] A first determination module 1204 is configured to determine target shooting parameters of a camera corresponding to the display screen to be corrected according to a pre-constructed corresponding relationship set, wherein the corresponding relationship set includes corresponding relationships between display parameters and target shooting parameters; and the target shooting parameters are parameters configured for the camera when shooting images on the display screen to be corrected.

[0131] In a feasible implementation manner, the first determination module 1204 is specifically configured to determine the target shooting parameters of the camera corresponding to the display screen to be corrected from a camera parameter database based on the display parameters of the display screen to be corrected.

[0132] An adjustment module 1206 is configured to adjust initial shooting parameters of the camera to the target shooting parameters.

[0133] The correction module 1208 is configured to correct the display screen to be corrected based on the image captured by the adjusted camera.

[0134] In an implementation, the correction module 1208 is specifically configured to control the adjusted camera to capture first image information of the display screen to be corrected, calculate current imaging quantization values and current brightness values of the lamp beads on the display screen to be corrected based on the first image information, and control the adjusted camera to capture second image information of the display screen to be corrected if the current imaging quantization values and the current brightness values both satisfy preset conditions, and correct the display screen to be corrected based on the second image information.

[0135] In an implementation, the correction module 1208 is further configured to update the set of corresponding relationships if the imaging quantization values or the brightness values do not satisfy the preset conditions, and determine the target shooting parameters of the camera corresponding to the display screen to be corrected according to the pre-constructed set of corresponding relationships.

[0136] In an implementation, the LED display screen correction device 1200 further includes:

[0137] The second acquisition module is configured to acquire first image information of a plurality of display screens to be corrected captured by the camera, and the display parameters of the display screens to be corrected are different.

[0138] The second determination module is configured to determine target shooting parameters of the camera corresponding to each display screen to be corrected based on image parameters of the first image information of each display screen to be corrected.

[0139] In an implementation, the second determination module is specifically configured to calculate imaging quantization values and brightness values of the lamp beads on each display screen to be corrected based on the first image information, and determine the current shooting parameters of the camera as the target shooting parameters of the camera corresponding to the display screen to be corrected if the imaging quantization values and the brightness values both satisfy preset conditions.

[0140] In an implementation, the second determination module is further configured to adjust the initial shooting parameters of the camera and repeat the steps of the construction process of the set of corresponding relationships if the imaging quantization values or the brightness values do not satisfy the preset conditions.

[0141] The generation module is configured to generate a plurality of corresponding relationships based on the display parameters of each display screen to be corrected and the target shooting parameters, and generate the set of corresponding relationships based on the plurality of corresponding relationships.

[0142] In an implementation, the LED display screen correction device 1200 further includes:

[0143] A storage module is configured to store the set of corresponding relationships into a camera parameter database.

[0144] In an implementation, the LED display screen correction device 1200 further includes:

[0145] A display module is configured to display the camera shooting parameter on a preset display interface.

[0146] The specific limitations of the LED display screen correction device can refer to the limitations of the LED display screen correction method described above, which will not be repeated here. Each module in the LED display screen correction device described above can be realized by software, hardware and their combination. Each module described above can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to call and execute the operation of each module by the processor.

[0147] Figure 13 is a schematic diagram of an electronic device according to an example embodiment of the present application. As shown in Figure 13 The electronic device can be used to implement the LED display screen correction method in the above embodiments.

[0148] As shown in Figure 13 The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected by a system bus. The processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The communication interface of the computer device is configured to perform wired or wireless communication with an external terminal. The wireless communication can be achieved by WIFI, mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by the processor to implement an LED display screen correction method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer overlaid on the display screen, or a key, trackball or touchpad arranged on the shell of the computer device, or an external keyboard, touchpad or mouse, etc.

[0149] Those skilled in the art can understand that Figure 13 the structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the terminal to which the scheme of the present application is applied. Alternatively, the terminal can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0150] It is easy to understand that the skilled in the art can combine, split, recombine, etc. the embodiments of the present application on the basis of the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0151] The above detailed description of the embodiments of the present application has further detailed the purposes, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above is only a specific implementation of the embodiments of the present application and is not used to limit the protection scope of the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A method for calibrating an LED display screen, characterized in that, include: Obtain the display parameters of the display screen to be calibrated; Based on a pre-built set of correspondences, the target shooting parameters of the camera corresponding to the display screen to be calibrated are determined. The set of correspondences includes the correspondence between the display parameters and the target shooting parameters. The target shooting parameters are the parameters configured by the camera when capturing images on the display screen to be calibrated. The display parameters of the display screen to be calibrated include the spacing information of the LEDs on the display screen and the brightness information of the display screen. The brightness information of the display screen to be calibrated is determined based on the average brightness of all LEDs on the display screen. The target shooting parameters include aperture size, exposure time, focal length, focus ring coordinates, and shooting distance. Adjust the initial shooting parameters of the camera to the target shooting parameters; The display screen to be calibrated is calibrated based on the image captured by the adjusted camera. The process of constructing the set of correspondences includes: Acquire first image information of multiple display screens to be calibrated captured by the camera; each display screen to be calibrated has different display parameters; Based on the image parameters of the first image information of each of the display screens to be calibrated, the target shooting parameters of the camera corresponding to each of the display screens to be calibrated are determined. Based on the display parameters of each of the display screens to be calibrated and the shooting parameters of each of the targets, a plurality of corresponding relationships are generated, and based on the plurality of corresponding relationships, a set of corresponding relationships is generated.

2. The LED display screen calibration method according to claim 1, characterized in that, The determination of target shooting parameters for the camera corresponding to each of the display screens to be calibrated, based on the image parameters of the first image information of each of the display screens to be calibrated, includes: Based on the first image information, the imaging quantization value and brightness value of each LED bead on the display screen to be corrected are calculated respectively; If both the imaging quantization value and the brightness value meet the preset conditions, then the current shooting parameters of the camera are determined as the target shooting parameters of the camera corresponding to the display screen to be calibrated.

3. The LED display screen calibration method according to claim 2, characterized in that, The method further includes: If the imaging quantization value or the brightness value does not meet the preset conditions, the initial shooting parameters of the camera are adjusted, and the steps of constructing the corresponding relationship set are repeated.

4. The LED display screen calibration method according to claim 2, characterized in that, The process of calibrating the display screen based on the image captured by the adjusted camera includes: The adjusted camera is controlled to acquire the first image information of the display screen to be calibrated; Based on the first image information, calculate the current imaging quantization value and the current brightness value of the LED beads on the display screen to be corrected; If both the current imaging quantization value and the current brightness value meet the preset conditions, the adjusted camera is controlled to acquire the second image information of the display screen to be calibrated, and the display screen to be calibrated is calibrated based on the second image information.

5. The LED display screen calibration method according to claim 4, characterized in that, The method further includes: If the imaging quantization value or the brightness value does not meet the preset condition, then update the corresponding relationship set; The step of determining the target shooting parameters of the camera corresponding to the display screen to be calibrated based on a pre-constructed set of correspondences includes: Based on the updated set of correspondences, the target shooting parameters of the camera corresponding to the display screen to be calibrated are determined.

6. The LED display screen calibration method according to claim 1, characterized in that, After generating the set of correspondences based on the multiple correspondences, the process includes: The set of correspondences is stored in the camera parameter database.

7. The LED display screen calibration method according to claim 6, characterized in that, The step of determining the target shooting parameters of the camera corresponding to the display screen to be calibrated based on a pre-constructed set of correspondences includes: Based on the display parameters of the display screen to be calibrated, the target shooting parameters of the camera corresponding to the display screen to be calibrated are determined from the camera parameter database.

8. The LED display screen calibration method according to any one of claims 1-7, characterized in that, The method further includes: The target shooting parameters of the camera are displayed on a preset display interface.

9. An LED display screen calibration system, characterized in that, The system includes a calibration system and a display screen system. The calibration system includes computer equipment and a camera, and the display screen system includes a display screen to be calibrated. The camera is used to acquire image information of the display screen to be calibrated; the image information includes first image information and second image information; The computer device is used to call computer program instructions stored in the memory and execute the instructions to implement the LED display screen calibration method according to any one of claims 1 to 8.

10. The LED display screen calibration system according to claim 9, characterized in that, The display screen system also includes a display screen control device; the computer device is communicatively connected to the display screen control device. The computer device is also used to control the display screen to be calibrated to display the image information via the display screen control device.

11. An LED display screen calibration device, characterized in that, include: The first acquisition module is used to acquire the display parameters of the display screen to be calibrated; The first determining module is used to determine the target shooting parameters of the camera corresponding to the display screen to be calibrated based on a pre-constructed set of correspondences. The set of correspondences includes the correspondence between the display parameters and the target shooting parameters. The target shooting parameters are the parameters configured by the camera when capturing images on the display screen to be calibrated. The display parameters of the display screen to be calibrated include the spacing information of the LEDs on the display screen and the brightness information of the display screen. The brightness information of the display screen to be calibrated is determined based on the average brightness of all LEDs on the display screen. The target shooting parameters include aperture size, exposure time, focal length, focus ring coordinates, and shooting distance. An adjustment module is used to adjust the initial shooting parameters of the camera to the target shooting parameters; The calibration module is used to calibrate the display screen to be calibrated based on the image captured by the adjusted camera. The second acquisition module is used to acquire the first image information of multiple displays to be calibrated captured by the camera; each display to be calibrated has different display parameters; The second determining module is used to determine the target shooting parameters of the camera corresponding to each display screen to be calibrated based on the image parameters of the first image information of each display screen to be calibrated. The generation module is used to generate multiple correspondences based on the display parameters of each display screen to be calibrated and the shooting parameters of each target, and to generate a set of correspondences based on the multiple correspondences.

12. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the LED display calibration method as described in any one of claims 1 to 8.

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