LED display screen lamp point correction method, terminal, device and system

Abstract

The invention relates to a lamp point correction method of an LED display screen, a terminal, equipment and a system, and the method comprises the steps: controlling a to-be-corrected region of the LED display screen to display a preset image, and enabling the preset image display region to comprise a gap at the splicing part between target display units of the to-be-corrected region, a target image obtained by collecting the screen body after the preset image is displayed in the to-be-corrected area through the collecting device is obtained, a gap correction coefficient is generated according to the target image, and the gap correction coefficient is used for correcting at least one adjacent lamp point on the two sides of the gap. According to the method, a good bright and dark line correction effect can be obtained without professional shooting equipment such as a tripod and a camera support, the applicability of the scheme in various scenes is improved, and the bright and dark line problem caused by more types of gap causes can be corrected.

Description

Technical Field

[0001] The present application relates to the field of display correction technology, and in particular to a method, terminal, device and system for correcting light points of an LED display screen. Background Art

[0002] At present, due to the unevenness of the splicing gaps when assembling the modules or boxes of the LED display screen, the module edge packaging process and other reasons, the LED display screen will have visual light and dark lines at the module splicing. In the prior art, there is a method of manually adjusting the brightness of the light points at the joints gap by gap to eliminate the light and dark lines, but the manual operation method requires high experience of the operator and is time-consuming. In the prior art, there is also a method of repeatedly shooting images of LED light points in a darkroom environment using a professional camera, a tripod and professional industrial correction software, using pattern recognition technology to identify and separate the LED light points on the image, and then calculating the distance between the LED light points to correct the gap. This method has high requirements on the hardware of the acquisition equipment, the light requirements of the acquisition environment and the experience requirements of the staff, resulting in the limited applicability of this method, and this method can only correct the visual light and dark lines caused by the density of the light point distance, and cannot correct the light points for the light points caused by the brightness difference of the light points themselves or the packaging process.

[0003] Therefore, how to provide a lamp point correction solution that has wider applicability and can cover more types of causes of bright and dark lines has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0004] In view of the above, the present application provides a method, terminal, device and system for calibrating light points of an LED display screen, the purpose of which is to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for calibrating a light point of an LED display screen, the method comprising:

[0006] Controlling the area to be corrected of the LED display screen to display a predetermined image, wherein the area where the predetermined image is displayed includes the gap between the target display units in the area to be corrected;

[0007] The acquisition device acquires a target image obtained by acquiring the screen after the predetermined image is displayed in the area to be corrected;

[0008] A gap correction coefficient is generated according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

[0009] In a second aspect, the present application provides a terminal, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0010] Memory, used to store programs;

[0011] The processor is used to implement the light point correction method of the LED display screen described in any embodiment of the first aspect when executing the program stored in the memory.

[0012] In a third aspect, the present application provides a collection device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0013] Memory, used to store programs;

[0014] The processor is used to implement the light point correction method of the LED display screen described in any embodiment of the first aspect when executing the program stored in the memory.

[0015] In a fourth aspect, a light point correction system for an LED display screen is provided, the system comprising a calculation device and a collection device;

[0016] The computing device is used to control the area to be corrected of the LED display screen to display a predetermined image, and the area where the predetermined image is displayed includes the gaps at the joints between the target display units in the area to be corrected;

[0017] The acquisition device is used to acquire a target image by acquiring the screen after the predetermined image is displayed in the area to be corrected;

[0018] The calculation device is also used to generate a gap correction coefficient according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

[0019] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0020] The present application controls the area to be corrected of the LED display to display a predetermined image, and the area displayed by the predetermined image includes the gap between the joints of the target display units in the area to be corrected. The acquisition device obtains the target image obtained by photographing the screen after the predetermined image is displayed in the area to be corrected. Since the target image reflects the display information such as brightness and chromaticity of each subdivided area in the area to be corrected of the display screen, a gap correction coefficient can be generated according to the target image. The calculation of the gap correction coefficient can be completed by photographing with an ordinary acquisition device, without the need for professional shooting equipment such as a tripod and a camera stand, and the requirements for the acquisition device are relatively low. A good light and dark line correction effect can also be obtained through the acquisition device provided by the mobile phone, thereby improving the applicability of the scheme in various scenarios. The gap correction coefficient can be used to correct at least one adjacent light point on both sides of the gap, which can not only correct the visual light and dark lines caused by the sparseness of the light point distance, but also correct the light and dark lines caused by the brightness difference of the light point itself and the packaging process. Since the target image is obtained by the acquisition device after the screen to be corrected displays the predetermined image, the display screen corresponding to the source data of the predetermined image can also be corrected, covering more types of light and dark line problems caused by gap formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of the application environment of the light point correction method of the LED display screen in the embodiment of the present application;

[0024] Figure 2 This is a flow chart of an embodiment of a method for correcting light points of an LED display screen of the present application;

[0025] Figure 3 This is a schematic diagram of the effect of the predetermined image in the embodiment of the present application;

[0026] Figure 4 A schematic diagram of a gap area and a reference area in an embodiment of the present application;

[0027] Figure 5 This is a module schematic diagram of an embodiment of a light point correction device for an LED display screen of the present application;

[0028] Figure 6A schematic diagram of a terminal embodiment of the present application;

[0029] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0032] Reference Figure 1 FIG. 1 is a schematic diagram of an application environment of a method for correcting light points of an LED display screen in an embodiment of the present application. The method for correcting light points of an LED display screen can be applied to a terminal, for example, the terminal 1 can be a mobile phone, computer, drone, camera or other terminal with shooting and data processing functions.

[0033] Terminal 1 is connected in communication with control system 2. Control system 2 refers to the LED display screen control system corresponding to the LED display screen. The LED display screen control system is a system that controls the LED display screen to display correctly according to user needs. It converts external video input signals or onboard multimedia files into digital signals that are easily recognized by the LED display screen, thereby lighting up the LED display screen. Control system 2 is connected in communication with LED display screen 3. In this embodiment, LED display screen 3 refers to a display screen that needs to be corrected for bright and dark lines. Among them, the communication connection method can be a local area network connection, a Bluetooth connection, a wired connection, etc., and the specific connection method is not limited here.

[0034] Due to the unevenness of the joint gaps when assembling the modules or boxes of the LED display screen, the LED display screen will have visual bright and dark lines. In the prior art, there is a method of manually adjusting the brightness of the light points at the joints gap by gap to eliminate the bright and dark lines, but the manual operation method requires high experience of the operator and is time-consuming. In the prior art, there is also a method of repeatedly shooting images of LED light points in a darkroom environment using a professional camera tripod and professional industrial calibration software, using pattern recognition technology to identify and separate the LED light points on the image, and then calculating the distance between the LED light points to correct the gap. This method has high requirements on the hardware of the acquisition equipment, the light requirements of the acquisition environment, and the experience of the staff. In addition, this method can only correct the visual bright and dark lines caused by the density of the light point distance, and cannot correct the bright and dark lines caused by the brightness difference of the light point itself or the packaging process.

[0035] To this end, this embodiment can first determine the area to be corrected that needs to be corrected on the LED display screen, and control the area to be corrected to display a predetermined image through the control system 2. After the terminal obtains the predetermined image displayed in the area to be corrected, the acquisition device acquires (for example, photographs) the screen body of the area to be corrected to obtain the target image or video data stream, wherein the acquisition device can be a shooting device built into the terminal, or a separate digital camera, or a shooting device built into other terminals with shooting functions. Since the target image reflects the display information such as brightness and chromaticity of each subdivided area in the area to be corrected of the display screen, the terminal can calculate the gap correction coefficient based on the target image, and the control system 2 can correct the display information such as brightness or chromaticity of at least one adjacent light point on both sides of the gap based on the gap correction coefficient.

[0036] The calculation of the gap correction coefficient can be completed by shooting with an ordinary acquisition device, and no professional shooting equipment such as a tripod or camera stand is required, which improves the applicability of the solution in various scenarios. The gap correction coefficient is generated based on the display information to correct the light and dark lines in the gap area. This correction method can not only correct the visual light and dark lines caused by the density of the light points, but also correct the light and dark line problems caused by the brightness difference of the light points themselves and the packaging process, covering more types of light and dark line problems caused by gap causes.

[0037] The present application also provides a method for calibrating a light point of an LED display screen. Figure 2 The figure is a schematic diagram of the method flow of an embodiment of the method for correcting the light point of an LED display screen of the present application. The method is applied to a terminal, and the terminal has a shooting function and a data processing function, for example, a mobile phone, a computer, a drone, a camera, etc. The terminal can be implemented by software and / or hardware. The method for correcting the light point of an LED display screen includes:

[0038] Step S10: Control the area to be corrected of the LED display screen to display a predetermined image, where the area where the predetermined image is displayed includes the gaps at the joints between the target display units in the area to be corrected;

[0039] Step S20: acquiring a target image obtained by the acquisition device by acquiring the screen after the predetermined image is displayed in the area to be corrected;

[0040] Step S30: generating a gap correction coefficient according to the target image, wherein the gap correction coefficient is used to correct at least one light point adjacent to two sides of the gap.

[0041] Since the splicing gaps of only some modules or boxes of the LED display may be uneven when the modules or boxes are assembled, the severity of the visual bright and dark lines in different areas of the LED display may be different. Therefore, the area to be corrected of the LED display can be determined first, and only the area to be corrected of the LED display can be corrected. The area to be corrected can also be a user-defined area. For example, the rectangular LED display is evenly divided into 6 areas, and the user can select one or more areas as the area to be corrected. The way to divide the area of ​​the LED display can be adjusted according to actual needs and is not limited here.

[0042] If the customized area to be corrected exceeds the acquisition capacity of the acquisition device, it will lead to inaccurate acquisition of bright and dark line information. In order to ensure the image quality captured by the acquisition device, it is also necessary to consider the size of the screen area of ​​the LED display screen that the acquisition device can capture at a time. Therefore, the area to be corrected of the LED display screen can be determined according to the screen size, the size of the target display unit (for example, the light board), the pixel resolution of the acquisition device and other information. Specifically, before controlling the area to be corrected of the LED display screen to display a predetermined image, the light point correction method also includes:

[0043] According to the pixel resolution of the acquisition device, the maximum number of light points of the LED display screen that can be photographed by the acquisition device in a single shot is calculated, wherein the acquisition device is used to photograph the area to be corrected after displaying a predetermined image;

[0044] Based on the maximum number of lamp points, the LED display screen is partitioned and the area to be corrected of the LED display screen is determined.

[0045] According to the pixel resolution of the acquisition device and the distance between the light points of the LED display screen, the maximum number of light points in the horizontal direction and the maximum number of light points in the vertical direction of the LED display screen that the acquisition device can capture in a single shot can be calculated. According to the calculated maximum number of light points, the LED display screen is partitioned, and the area to be corrected of the LED display screen is determined according to the user's choice, so that the area to be corrected does not exceed the acquisition capacity of the acquisition device, ensuring accurate acquisition of bright and dark line information. For example, the screen size of the LED display screen is 1920*800, assuming that the maximum number of light points that the acquisition device can collect in a single time is 1200*900, the LED display screen can be divided into two left and right areas, and the area to be corrected can also be an area of ​​any size and position under the partition. If the user only wants to correct the screen body with a size of 500*300 in the lower left corner of the left partition, then the screen body is used as the area to be corrected.

[0046] Furthermore, the maximum number of light points of the LED display screen can also be calculated in combination with the sampling rate of a single light point under shooting accuracy. The sampling rate of a single light point refers to the number of samples collected in the horizontal and vertical directions of each light point (i.e., each LED light-emitting element) when collecting images of the LED display screen. The sampling rate of a single light point defines the number of pixels used to collect the characteristics of each light point during the image collection process. Specifically, the above step of "calculating the maximum number of light points of the LED display screen when the collection device takes a single shot based on the pixel resolution of the collection device" includes:

[0047] The result obtained by multiplying the horizontal resolution of the acquisition device by the screen ratio of the LED display screen in the field of view of the acquisition device is divided by the preset horizontal sampling rate of a single light point to obtain the maximum number of light points in the horizontal direction of the LED display screen that the acquisition device can capture in a single time;

[0048] The result obtained by multiplying the longitudinal resolution of the acquisition device by the image ratio of the LED display screen in the field of view of the acquisition device is divided by the preset longitudinal sampling rate of a single light point to obtain the maximum number of longitudinal light points of the LED display screen that the acquisition device can capture in a single shot.

[0049] That is, the maximum number of light points collected in a single horizontal acquisition = the horizontal resolution of the acquisition device * the proportion of the LED display screen in the field of view of the acquisition device / the horizontal sampling rate of a single light point. The maximum number of light points collected in a single vertical acquisition = the vertical resolution of the acquisition device * the proportion of the LED display screen in the field of view of the acquisition device / the vertical sampling rate of a single light point. By calculating the maximum number of light points of the LED display screen in combination with the sampling rate of a single light point under the shooting accuracy, it can ensure that the bright and dark line information of the area to be corrected is collected accurately. For example, assuming that the resolution of the acquisition device is 4000*3000, the LED display screen occupies 80% of the field of view of the acquisition device, and the sampling rate is 3*3, then the maximum number of light points of the LED display screen in the horizontal direction of a single shot is 4000*0.8 / 3=1066, and the maximum number of light points of the LED display screen in the vertical direction of a single shot is 3000*0.8 / 3=800.

[0050] After determining the area to be corrected, the terminal can obtain a predetermined image and control the area to be corrected to display the predetermined image. Specifically, the step of "controlling the area to be corrected of the LED display to display the predetermined image" includes:

[0051] The LED display screen control system corresponding to the LED display screen is used to control the area to be corrected to display a predetermined image, wherein the predetermined image includes an image composed of a plurality of image blocks or image bands displayed by a plurality of light points distributed on both sides of the gap.

[0052] Since the terminal is connected to the LED display screen control system by communication, the terminal can send the predetermined image to the LED display screen control system, and the LED display screen control system controls the area to be corrected to display the predetermined image. Figure 3 As shown, it is a schematic diagram of the effect of the predetermined image in the embodiment of the present application. The actual display effect of the predetermined image can be a dot matrix image, a cross-line image and / or a checkerboard image. The image blocks or image bands of the predetermined image can be symmetrically distributed on both sides of the gap area, or can be asymmetrically distributed. The predetermined image can be used to assist in identifying and locating the gap area and the reference area, so as to subsequently accurately eliminate the bright and dark lines in the area to be corrected. It can be understood that the predetermined image can be a single-frame image, or it can be a video stream data composed of multiple frames of images, that is, the predetermined image can be a single-frame image or multiple-frame images.

[0053] After the area to be corrected displays the predetermined image, the user can use the acquisition device to shoot the area to be corrected. After the terminal reads the predetermined image displayed on the area to be corrected, the acquisition device captures the screen of the area to be corrected to obtain an image (referred to as the target image). The target image can be a single-frame image or a video stream data composed of multiple frames of images, that is, the target image can be a one-frame image or multiple frames of images. The target image is analyzed to correct the area to be corrected on the LED display. Since the captured target image has image quality problems such as overexposure and oversharpness, it will affect the subsequent correction effect, so the imaging quality of the target image can also be verified. Specifically, after obtaining the target image obtained by the acquisition device capturing the screen after the area to be corrected displays the predetermined image, the method also includes:

[0054] Step A1, determining the screen area in the target image;

[0055] Step A2: respectively determining whether the exposure value and the sharpness value of the screen area are both within corresponding preset ranges;

[0056] Step A3: if not, adjusting the imaging parameters of the acquisition device, and controlling the acquisition device to re-photograph the screen of the area to be corrected;

[0057] Step A4: Use the re-photographed image as the target image, and repeat the above steps A1 to A2 until the exposure value and sharpness value of the screen area in the target image are both within the corresponding preset ranges.

[0058] The screen area in the target image can be determined through a pre-trained contour extraction algorithm to determine whether the exposure value of the screen area is within the first interval, which can be between 20% and 80%. And determine whether the sharpness value of the screen area is within the second interval, which can be between 60% and 90%. It should be noted that the values ​​of the first interval and the second interval can be adjusted according to actual conditions and are not limited here. If the exposure value and the sharpness value of the screen area are both in the corresponding preset intervals, it means that the imaging quality of the target image is good, and the terminal can directly analyze and process the target image to perform light point correction in the area to be corrected.

[0059] If any of the exposure value and the sharpness value of the screen area is not within the corresponding preset interval, it means that the imaging quality of the target image is poor. At this time, adjust the imaging parameters of the acquisition device (for example, adjust the exposure time, gain, aperture, micro focus, etc.), and control the acquisition device to re-shoot the screen in the area to be corrected. Use the re-shot image as the target image, and repeat the above steps A1 to A2 until the exposure value and sharpness value of the screen area in the target image are within the corresponding preset interval. By verifying the imaging quality of the target image, it can be ensured that a target image with high imaging quality is obtained, thereby improving the accuracy of correcting the light points.

[0060] Since the target image reflects the display information such as brightness and chromaticity of each subdivided area in the area to be corrected of the display screen, the gap correction coefficient can be calculated according to the target image. The gap correction coefficient represents the difference in display information between the adjacent lamp points on both sides of the gap in the area to be corrected and the remaining lamp points in the area to be corrected. Based on the difference in display information, the control system can correct the display information such as brightness or chromaticity of the adjacent lamp points on both sides of the gap according to the gap correction coefficient. Therefore, the visual bright and dark lines caused by the density of the lamp points can be corrected, and the bright and dark lines caused by the brightness difference of the lamp points themselves and the packaging process can also be corrected.

[0061] Specifically, the area where the predetermined image is displayed includes a gap area and a reference area, and the step of "correcting at least one light point adjacent to both sides of the gap" includes:

[0062] According to the display information of the reference area, the original display information of the light point in the gap area is corrected to obtain the corrected display information of the light point in the gap area, wherein the original display information includes the initial uncorrected display information or the corrected display information.

[0063] Ginseng Figure 4 As shown, it is a schematic diagram of the gap area and the reference area in an embodiment of the present application. The target display unit 4 and the target display unit 5 are spliced ​​to produce a gap 6. The gap area 7 includes the gap 6 and the light points adjacent to the two sides of the gap 6. The reference area 8 refers to the area without bright or dark lines in the target display unit. For example, the reference area 8 can be the central area of ​​the target display unit, which includes a number of light points.

[0064] Since the lamp points in the reference area 8 are not the lamp points at the joint of the target display unit, the lamp points in the reference area 8 usually do not have bright and dark lines. Therefore, the original display information of the lamp points in the gap area 7 can be corrected according to the display information of the reference area, so as to obtain the corrected display information of the lamp points in the gap area 7. Among them, the display information can be information such as luminous flux, color bit depth, dynamic range, color saturation, color temperature, etc. It should be noted that, assuming that after the original display information of the lamp points in the gap area is corrected for the first time, the user is not satisfied with the correction result, and a second correction can be performed. At this time, the display information after the first correction is used as the original display information, that is, the original display information can be the initial display information before correction, or it can be the corrected display information. Thereby, the correction of bright and dark lines caused by the lamp point packaging process is achieved.

[0065] Furthermore, the above step of “correcting the original display information of the light points in the gap area” specifically includes:

[0066] Determine the gap area and the reference area of ​​the gap at the joint between the target display units of the area to be corrected in the target image, and obtain display information of the light points in the gap area and the light points in the reference area;

[0067] A gap correction coefficient is calculated based on the original display information of the light points in the gap area and the display information of the light points in the reference area, and the gap correction coefficient is used to correct the original display information of the light points in the gap area and / or the original display image, wherein the gap area at least includes an area corresponding to at least one light point adjacent to both sides of the gap.

[0068] The gap area at the joint of the target display unit (e.g., light board) in the area to be corrected in the target image can be determined by an edge detection algorithm (e.g., Canny algorithm), and the reference area corresponding to the gap area can be determined, and the display information of the gap area light points and the reference area light points can be obtained. The reference area light points can be used to compare the display information with the gap area light points, and the reference area can be an area around the gap area.

[0069] After obtaining the display information of the light points in the gap area and the light points in the reference area, the gap correction coefficient can be calculated. The gap correction coefficient represents the difference between the display information of the light points in the gap area and the display information of the light points in the reference area. The gap correction coefficient can be used to correct the original display information of the light points in the gap area and / or the original display screen, wherein the original display screen refers to the original display screen of the image source or video source corresponding to the predetermined image. Through correction at the hardware level (light point brightness) and the software level (original display screen), the bright and dark lines in the area to be corrected can be eliminated to a greater extent.

[0070] The step of “determining the gap region and the reference region of the gap between the target display units at the joints of the target image and the region to be corrected” specifically includes:

[0071] Determine the area of ​​each of the target display units in the area to be corrected in the target image;

[0072] According to the area of ​​each target display unit, identifying the gap area between the joints of the target display units;

[0073] Selecting an area at a preset distance from the gap area and corresponding to part of the light points of at least one row or one column of the target display unit on both sides of the gap area as the reference area;

[0074] or,

[0075] An area which is a preset distance from the gap area and corresponds to all the light points of at least one row or one column of the target display unit on both sides of the gap area is selected as the reference area.

[0076] Determine the position of each target display unit (for example, light board) in the area to be corrected, calculate the spatial position between adjacent light boards, and thus determine the gap area at the joint of adjacent light boards. When determining the reference area, you can select an area that is 1 light point away from the gap area and corresponds to several light points in a row or column of the light boards on both sides of the gap area as the reference area. For example, assuming that the number of light points in a row of the light board and the number of light points in a column are both 10, you can select an area that is 1 light point away from the gap area and 5 light points in a row of light points on the light boards on both sides of the gap area as the reference area, or you can select an area that is 2 light points away from the gap area and 8 light points in two columns of light points on the light boards on both sides of the gap area as the reference area.

[0077] Alternatively, an area corresponding to all the light points of at least one row or one column of the light boards on both sides of the gap area and 2 light points away from the gap area is selected as a reference area. An area corresponding to all the light points of at least two rows or two columns of the light boards on both sides of the gap area and 3 light points away from the gap area is also selected as a reference area. Since the light points in the central area of ​​the light board are far away from the gap area, an area corresponding to at least one row or one column of the light points in the central area of ​​the light board can also be selected as a reference area, so that the display information of the light points in the gap area is visually infinitely close to the display information in the central area of ​​the light board, thereby eliminating the bright and dark lines. It can be understood that the preset distance can be other values, which are not specifically limited here.

[0078] Further, the preset distance is at least 0 light points, and when the preset distance is 0 light points, the gap area is adjacent to the reference area.

[0079] Since there is usually no bright or dark line in the non-gap area, the area with 0 light points away from the gap area and several light points of the light board on both sides of the gap area can also be used as the reference area, that is, the area with several light points adjacent to the gap area is selected as the reference area. In this case, the gap area is adjacent to the reference area. Since the gap area is adjacent to the reference area, after correcting the light points in the gap area, the display information of the light points in the gap area can be visually infinitely close to the display information of the light points in the adjacent area, thereby eliminating the bright or dark line.

[0080] Furthermore, the reference area may also be an area adjacent to the gap area and containing at least five rows or columns of light points. Taking the display information as luminous flux as an example, since the luminous flux of the light points in the reference area reflects the intensity of light emitted by the reference area, by selecting an area containing five rows or columns of light points as the reference area, the range of the reference area can be expanded to avoid deviations in the correction of the light points in the gap area due to abnormal display of the selected light points when selecting a single row or column of light points.

[0081] Specifically, the above step of “obtaining display information of the light points in the gap area and the light points in the reference area” specifically includes:

[0082] Acquiring image information of the gap area and the reference area;

[0083] Display information of the gap area and the reference area is obtained according to the image information of the gap area and the reference area.

[0084] Image information can be information such as pixel value, color value, contrast, etc., and display information can be information such as luminous flux, brightness value, color bit depth, dynamic range, color saturation, color temperature, etc. Taking luminous flux as an example, luminous flux refers to the amount of light energy per unit area passing through a surface per unit time. The luminous flux of the lamp point in the gap area reflects the intensity of light emitted by the lamp point in the gap area, and the luminous flux of the lamp point in the reference area reflects the intensity of light emitted by the reference area. Therefore, the brightness of the lamp point in the gap area can be corrected based on the difference in luminous flux between the two areas to eliminate the bright and dark lines of the lamp point in the area to be corrected.

[0085] Taking the image information as pixel value and the display information as luminous flux as an example, since the pixel value of the target image reflects the display characteristics of the screen (such as brightness, color and other information), the display information of the gap area and the reference area can be evaluated based on the pixel value, and the display characteristics of the light points in the gap area can be corrected based on the difference in the display information of the two, thereby improving the visual light and dark line effect. Specifically, the pixel values ​​of the gap area and the reference area are obtained respectively, and the sum of the pixel values ​​of the gap area is calculated as the display information of the gap area, and the sum of the pixel values ​​of the reference area is calculated as the display information of the reference area, that is, the luminous flux of the gap area and the reference area is calculated through the pixel values ​​of the gap area and the reference area. It can be understood that the average of the pixel values ​​of the gap area can also be used as the luminous flux of the gap area, and the average of the pixel values ​​of the reference area can be used as the luminous flux of the gap area.

[0086] Taking the image information as contrast and the display information as dynamic range as an example, the dynamic range refers to the ratio of the maximum brightness value to the minimum brightness value. Since the contrast of the target image reflects the degree of difference between the light and dark areas in the target image, the display information of the gap area and the reference area can be evaluated based on the contrast. Specifically, the contrast of the gap area and the reference area are obtained respectively, the dynamic range of the gap area is calculated according to the contrast of the gap area, the dynamic range of the reference area is calculated according to the contrast of the reference area, and the display characteristics of the light points in the gap area are corrected based on the difference between the gap area and the reference area, thereby improving the visual light and dark line effect.

[0087] Taking the image information as the pixel value of multiple color channels and the display information as the chromaticity information as an example, the value obtained by the mean or weighted sum of the pixel values ​​of multiple color channels can represent the value of the chromaticity information, and then according to the chromaticity information of the gap area and the reference area, the brightness of the three RGB lamp beads in the gap area of ​​the screen can be adjusted respectively, so as to achieve better gap correction effect in various display states of the RGB lamp beads.

[0088] Furthermore, the step of “calculating a gap correction coefficient based on the original display information of the light point in the gap area and the display information of the light point in the reference area, wherein the gap correction coefficient is used to correct the original display information of the light point in the gap area and / or the original display image” includes:

[0089] Determine difference information between original display information of the light point in the gap area and display information of the light point in the reference area;

[0090] Calculate the gap correction coefficient according to the difference information, so that the LED display screen control system corresponding to the LED display screen can correct the original display information of the light points in the gap area based on the gap correction coefficient, so that the difference between the original display information of the light points in the gap area after correction and the display information of the light points in the reference area is less than a first preset threshold value;

[0091] And / or, the LED display control system corresponding to the LED display corrects the display parameters corresponding to the original display image based on the gap correction coefficient, so that the difference between the display parameters of the original display image of the light points in the gap area after correction and the display parameters of the display image of the light points in the reference area is less than a second preset threshold.

[0092] The difference information between the original display information of the light points in the gap area and the display information of the light points in the reference area may refer to the difference between the display information of the two, or may refer to the ratio of the display information of the two. Taking the display information as luminous flux as an example, the ratio of the luminous flux of the light points in the gap area in the target image to the luminous flux of the light points in the reference area is calculated, and the ratio is used as the gap correction coefficient, so that the LED display control system can correct the original luminous flux of the light points in the gap area according to the gap correction coefficient. For example, the LED display control system is used to correct the size or duty cycle of the driving current of the light points in the gap area (i.e., the lamp beads), thereby adjusting the brightness of the light points in the gap area, so that the difference between the original luminous flux of the light points in the gap area after correction and the luminous flux of the light points in the reference area is less than the first preset threshold value, so as to eliminate the bright and dark lines of the light points in the gap area. It can be understood that the first preset threshold value can be set according to actual needs, for example, 50CD / m 2 , the first preset threshold is not specifically limited here.

[0093] In addition, the LED display control system can also correct the display parameters corresponding to the original display picture of the gap area light point according to the gap correction coefficient. The display parameters may be parameters such as brightness value, chromaticity value, saturation value, etc., so that the difference between the display parameters of the original display picture of the gap area light point after correction and the display parameters of the display picture of the reference area light point is less than a second preset threshold value, that is, the image source or video source corresponding to the predetermined image displayed at the gap area light point is corrected. For example, assuming that when the predetermined image is displayed at the gap area light point, the brightness of the gap area light point is bright, the display brightness of the image source or video source of the predetermined image corresponding to the gap area can be lowered, thereby achieving the effect of visually improving the bright and dark lines of the display picture of the gap area light point.

[0094] It should be noted that, assuming that after the first calibration of the original display image of the light point in the gap area, the user is not satisfied with the calibration result, a second calibration can be performed. In this case, the display image after the first calibration is used as the original display image, that is, the original display image can be the initial display image before calibration, or it can be the display image after calibration. The second preset threshold can also be set according to actual needs, for example, 50nit, and the second preset threshold is not specifically limited here.

[0095] In other embodiments, after the brightness of the lamps in the gap area in the area to be corrected is corrected, if the user is not satisfied with the correction effect, the target image can be obtained by re-shooting the screen body displaying the predetermined image in the area to be corrected through the acquisition device, and then the gap correction coefficient can be regenerated according to the target image, so that the LED display control system can correct the lamps adjacent to each other on both sides of the gap according to the regenerated gap correction coefficient. When the user thinks that the bright and dark lines have been eliminated, the correction can be stopped. If the correction is not completed, the correction can be continued. The correction effect will be gradually optimized until it approaches the limit of the shooting accuracy of the acquisition device. Furthermore, after the brightness of the lamps in the gap area in a certain area to be corrected in the LED display, the other areas to be corrected in the LED display can also be corrected until the bright and dark lines in the LED display are eliminated.

[0096] Reference Figure 5 , which is a schematic diagram of the functional modules of the light point correction device 100 of the LED display screen of the present application.

[0097] The light point correction device 100 for an LED display screen described in the present application can be installed in a terminal. According to the functions to be implemented, the light point correction device 100 for an LED display screen can include a display module 110, an acquisition module 120, and a correction module 130. The module described in the present application can also be referred to as a unit, which refers to a series of program segments that can be executed by a terminal processor and can complete fixed functions, and is stored in the memory of the terminal.

[0098] In this embodiment, the functions of each module / unit are as follows:

[0099] The display module 110 is used to control the area to be corrected of the LED display screen to display a predetermined image, where the area where the predetermined image is displayed includes the gaps at the joints between the target display units in the area to be corrected;

[0100] An acquisition module 120 is used to acquire a target image obtained by an acquisition device acquiring a screen after the area to be corrected displays a predetermined image;

[0101] The correction module 130 is used to generate a gap correction coefficient according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

[0102] The specific implementation of the lamp point correction device 100 of the LED display screen of the present application is substantially the same as the specific implementation of the lamp point correction method of the LED display screen described above, and will not be described in detail herein.

[0103] Reference Figure 6 , which is a schematic diagram of a preferred embodiment of the terminal of the present application.

[0104] The terminal includes a processor 111, a communication interface 112, a memory 113 and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other via the communication bus 114;

[0105] The memory 113 is used to store programs, for example, a light point calibration program of an LED display screen;

[0106] In one embodiment of the present application, the processor 111 is used to execute the program stored in the memory 113 to implement the light point correction method of the LED display screen provided by any of the above method embodiments, including:

[0107] Controlling the area to be corrected of the LED display screen to display a predetermined image, wherein the area where the predetermined image is displayed includes the gap between the target display units in the area to be corrected;

[0108] The acquisition device acquires a target image obtained by acquiring the screen after the predetermined image is displayed in the area to be corrected;

[0109] A gap correction coefficient is generated according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

[0110] For a detailed description of the above steps, please refer to the above description of the embodiment of the light point correction method for the LED display screen.

[0111] The embodiment of the present application provides a collection device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus;

[0112] Memory, used to store programs;

[0113] The processor is used to implement the light point correction method of the LED display screen described in any embodiment of the first aspect when executing the program stored in the memory.

[0114] For a detailed description of the above steps, please refer to the above description of the embodiment of the light point correction method for the LED display screen.

[0115] The embodiment of the present application provides a light point correction system for an LED display screen, the system comprising a calculation device and a collection device;

[0116] The computing device is used to control the area to be corrected of the LED display screen to display a predetermined image, and the area where the predetermined image is displayed includes the gaps at the joints between the target display units in the area to be corrected;

[0117] The acquisition device is used to acquire a target image by acquiring the screen after the predetermined image is displayed in the area to be corrected;

[0118] The calculation device is also used to generate a gap correction coefficient according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

[0119] The computing device may be a device with data processing capabilities, such as a mobile phone, a computer, etc. The acquisition device may be a device with image acquisition functions, such as a camera, etc. The specific implementation of the LED display screen light point correction system of the present application is roughly the same as the specific implementation of the LED display screen light point correction method described above, and will not be repeated here.

[0120] In addition, the embodiment of the present application also proposes a computer-readable storage medium, which can be non-volatile or volatile. The computer-readable storage medium includes a data storage area and a program storage area, and the program storage area stores a light point correction program for an LED display screen. When the light point correction program for an LED display screen is executed by a processor, the following operations are implemented:

[0121] Controlling the area to be corrected of the LED display screen to display a predetermined image, wherein the area where the predetermined image is displayed includes the gap between the target display units in the area to be corrected;

[0122] The acquisition device acquires a target image obtained by acquiring the screen after the predetermined image is displayed in the area to be corrected;

[0123] A gap correction coefficient is generated according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

[0124] The specific implementation of the computer-readable storage medium of the present application is substantially the same as the specific implementation of the light point correction method of the above-mentioned LED display screen, and will not be described in detail here.

[0125] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0126] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0127] It should be noted that the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0128] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0129] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for correcting light points of an LED display screen, characterized in that: The method comprises: Controlling the area to be corrected of the LED display screen to display a predetermined image, wherein the area where the predetermined image is displayed includes the gaps at the joints between the target display units in the area to be corrected; The acquisition device acquires a target image obtained by acquiring the screen after the predetermined image is displayed in the area to be corrected; A gap correction coefficient is generated according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

2. The method for correcting the light point of an LED display screen according to claim 1, characterized in that: The area where the predetermined image is displayed includes a gap area and a reference area, and the correction of at least one light point adjacent to both sides of the gap includes: According to the display information of the reference area, the original display information of the light point in the gap area is corrected to obtain the corrected display information of the light point in the gap area, wherein the original display information includes the initial uncorrected display information or the corrected display information.

3. The method for correcting the light point of an LED display screen as claimed in claim 2, characterized in that: The correcting the original display information of the light points in the gap area includes: Determine the gap area and the reference area of ​​the gap at the joint between the target display units of the area to be corrected in the target image, and obtain display information of the light points in the gap area and the light points in the reference area; A gap correction coefficient is calculated based on the original display information of the light points in the gap area and the display information of the light points in the reference area, and the gap correction coefficient is used to correct the original display information of the light points in the gap area and / or the original display image, wherein the gap area at least includes an area corresponding to at least one light point adjacent to both sides of the gap.

4. The method for calibrating a light point of an LED display screen as claimed in claim 3, characterized in that: The determining of the gap region and the reference region of the gap at the joint between the target display units of the area to be corrected in the target image includes: Determine the area of ​​each of the target display units in the area to be corrected in the target image; According to the area of ​​each target display unit, identifying the gap area between the joints of the target display units; Selecting an area at a preset distance from the gap area and corresponding to part of the light points of at least one row or one column of the target display unit on both sides of the gap area as the reference area; or, An area which is a preset distance from the gap area and corresponds to all the light points of at least one row or one column of the target display unit on both sides of the gap area is selected as the reference area.

5. The method for calibrating a light point of an LED display screen as claimed in claim 4, characterized in that: The preset distance is at least 0 light points. When the preset distance is 0 light points, the gap area is adjacent to the reference area.

6. The method for calibrating a light point of an LED display screen as claimed in claim 3, characterized in that: The calculating of the gap correction coefficient according to the original display information of the light point in the gap area and the display information of the light point in the reference area, wherein the gap correction coefficient is used to correct the original display information of the light point in the gap area and / or the original display screen, includes: Determine difference information between original display information of the light point in the gap area and display information of the light point in the reference area; Calculate the gap correction coefficient according to the difference information, so that the LED display screen control system corresponding to the LED display screen can correct the original display information of the light points in the gap area based on the gap correction coefficient, so that the difference between the original display information of the light points in the gap area after correction and the display information of the light points in the reference area is less than a first preset threshold value; And / or, the LED display control system corresponding to the LED display corrects the display parameters corresponding to the original display image based on the gap correction coefficient, so that the difference between the display parameters of the original display image of the light points in the gap area after correction and the display parameters of the display image of the light points in the reference area is less than a second preset threshold.

7. The method for calibrating a light point of an LED display screen according to claim 1, characterized in that: The method of controlling the area to be corrected of the LED display screen to display a predetermined image comprises: The LED display screen control system corresponding to the LED display screen is used to control the area to be corrected to display a predetermined image, wherein the predetermined image includes an image composed of a plurality of image blocks or image bands displayed by a plurality of light points distributed on both sides of the gap.

8. A terminal, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store programs; The processor is used to implement the light point correction method of the LED display screen according to any one of claims 1 to 7 when executing the program stored in the memory.

9. A collection device, characterized in that: It includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; Memory, used to store programs; The processor is used to implement the light point correction method of the LED display screen according to any one of claims 1 to 7 when executing the program stored in the memory.

10. A light point calibration system for an LED display screen, characterized in that: The system includes a computing device and a collecting device; The computing device is used to control the area to be corrected of the LED display screen to display a predetermined image, and the area where the predetermined image is displayed includes the gaps at the joints between the target display units in the area to be corrected; The acquisition device is used to acquire a target image by acquiring the screen after the predetermined image is displayed in the area to be corrected; The calculation device is also used to generate a gap correction coefficient according to the target image, and the gap correction coefficient is used to correct at least one light point adjacent to both sides of the gap.

Images