LED light curtain display delay measurement method and system

Abstract

The present disclosure relates to the field of LED light curtain detection, and specifically to a method and system for measuring display delay of an LED light curtain, the method comprising the following steps: receiving an LED light curtain operation signal; controlling a light sensing module capable of sensing the LED light curtain to obtain at least three first LED light curtain high-definition images at the same position at different times; based on the at least three first LED light curtain high-definition images, identifying the display delay of the LED light curtain; the at least three LED light curtain high-definition images include selected high-definition images when the LED light curtain changes and high-definition images showing stability; based on the result of the LED light curtain display delay identification, obtaining the position of the LED lamp beads with display delay in the LED light curtain. The present disclosure can realize accurate measurement of display delay and identification of problematic lamp beads in non-ideal lighting environments.

Description

Technical Field

[0001] The present disclosure relates to the field of LED light curtain detection, and in particular to a method and system for measuring display delay of an LED light curtain. Background Art

[0002] LED light curtains are widely used in office building exteriors, large conference rooms, wedding scene layouts, etc. Although the life of LEDs is longer than that of other display screens, like other screen display modules, they also have a life cycle. After long-term use, the light output of the LED is significantly different from its initial value when it was first used, resulting in a decrease in brightness and color, affecting the overall display effect.

[0003] In the prior art, the LED light curtain is usually maintained by replacing the LED lamp beads that are about to reach the end of their life within a fixed time. However, the entire light curtain may need to be replaced due to the short life or failure of some LED lamp beads. The overall replacement cost is high. At this time, manual screening and replacement of LED lamp beads with brightness or color problems is a large workload, and it is difficult to accurately and comprehensively screen out all faulty or life-limited LED lamp beads by human eyes.

[0004] In the prior art, there is also a method of using external light sensors to determine the LED lamp beads with display delay and display brightness problems when the LED is turned on or switches color or brightness, that is, to achieve identification by measuring the display delay. However, this method needs to be implemented in an ideal lighting environment. However, except for some indoor application scenarios, most light curtains are difficult to achieve an ideal lighting environment, and the measurement results obtained by using external light sensors are inaccurate.

[0005] Therefore, there is a need for an accurate measurement method that can achieve display delay even in non-ideal lighting environments to screen out problematic LED lamp beads for easy replacement. Summary of the invention

[0006] The present disclosure provides a method and system for measuring display delay of an LED light curtain, which can accurately measure display delay and identify problematic lamp beads in a non-ideal lighting environment, so as to solve the above-mentioned problems mentioned in the background technology and facilitate partial replacement of the LED light curtain. The present disclosure provides the following technical solutions:

[0007] As one aspect of an embodiment of the present disclosure, a method for measuring a display delay of an LED light curtain is provided, comprising the following steps:

[0008] Receive an LED light curtain operation signal; the LED light curtain operation signal includes at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal;

[0009] Controlling a light sensing module capable of sensing the LED light curtain to obtain at least three high-definition images of the first LED light curtain at the same position at different times;

[0010] Based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed; the at least three LED light curtain high-definition images include selected high-definition images when the LED light curtain changes and high-definition images showing stable display;

[0011] Based on the result of the LED light curtain display delay identification, the position of the LED lamp bead with display delay in the LED light curtain is obtained.

[0012] Optionally, before controlling the light sensing module capable of sensing the LED light curtain to obtain at least three high-definition images of the LED light curtain at the same position at different times, the method further comprises: obtaining a second high-definition image of the LED light curtain before the operation signal of the LED light curtain is received;

[0013] Before performing LED light curtain display delay recognition, it is used to perform interference light source analysis on the first LED light curtain high-definition image that is stable after the LED light curtain changes and denoise the at least three LED light curtain high-definition images to eliminate interference in LED light curtain display delay recognition.

[0014] Optionally, obtaining at least three high-definition images of the first LED light curtain at the same position at different times includes:

[0015] The light sensing module is controlled to perform timed continuous shooting of the LED light curtain to obtain no less than three high-definition images of the first LED light curtain.

[0016] Optionally, when the LED light curtain operation signal includes an LED light curtain color change signal, the colors of the LED light curtain before and after the color change are both pure colors.

[0017] Optionally, based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed, including:

[0018] Identify LED lamp beads with display delay in no less than the first LED light curtain high-definition image in turn; and compare the brightness or color of the same LED lamp bead in the next first LED light curtain high-definition image with the surrounding LED lamp beads. If its brightness or color is different from those of the surrounding LED lamp beads, determine that the LED lamp bead is a problematic lamp bead; if its brightness or color is no different from those of the surrounding LED lamp beads, switch the LED light curtain operation signal to achieve the next round of LED light curtain display delay measurement.

[0019] Optionally, after acquiring at least three first LED light curtain high-definition images at the same position at different times, before performing LED light curtain display delay identification, the following steps are also included:

[0020] Determine the LED light curtain change signal transmission position, the change transmission position is the signal transmission position before the LED light curtain realizes the switching of LED lamp beads in the entire light curtain after the display mode is switched; and exclude the LED lamp beads involved in the signal transmission position during delayed identification.

[0021] As another aspect of the embodiment of the present disclosure, a LED light curtain display delay measurement system is provided, comprising:

[0022] An operation signal receiving unit receives an LED light curtain operation signal;

[0023] a high-definition image acquisition unit, controlling a light sensing module capable of sensing the LED light curtain to acquire at least three first LED light curtain high-definition images at the same position at different times; the LED light curtain operation signal comprises at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal;

[0024] The display delay recognition unit performs LED light curtain display delay recognition based on the at least three first LED light curtain high-definition images; the at least three LED light curtain high-definition images include the selected high-definition images when the LED light curtain changes and the high-definition images when the display is stable

[0025] The problematic lamp bead position determination unit obtains the position of the LED lamp bead with display delay in the LED light curtain based on the result of the LED light curtain display delay identification.

[0026] Optionally, based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed, including:

[0027] Identify LED lamp beads with display delay in no less than the first LED light curtain high-definition image in turn; and compare the brightness or color of the same LED lamp bead in the next first LED light curtain high-definition image with the surrounding LED lamp beads. If its brightness or color is different from those of the surrounding LED lamp beads, determine that the LED lamp bead is a problematic lamp bead; if its brightness or color is no different from those of the surrounding LED lamp beads, switch the LED light curtain operation signal to achieve the next round of LED light curtain display delay measurement.

[0028] As another aspect of an embodiment of the present disclosure, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the LED light curtain display delay measurement method when executing the computer program.

[0029] As another aspect of the embodiments of the present disclosure, a computer-readable storage medium is also provided, on which a computer program is stored, and when the program is executed by a processor, the LED light curtain display delay measurement method is implemented.

[0030] Compared with the prior art, the present invention obtains a high-definition image signal of the LED light curtain based on the LED light curtain operation signal (i.e., a switching signal of the light curtain color or brightness, etc.), and avoids errors in identifying problematic lamp beads due to non-ideal lighting environments based on the difference in light emission before and after the high-definition image and the lamp bead array itself, and identifies problematic lamp beads based on the delay in the light curtain display, and accurately locates the problematic lamp beads. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flowchart of the LED light curtain display delay measurement method according to Embodiment 1 of the present disclosure;

[0032] Figure 2 It is a schematic block diagram of the principle of implementing the LED light curtain display delay measurement according to Embodiment 1 of the present disclosure;

[0033] Figure 3 This is a schematic diagram of the interference light source analysis steps used in the LED light curtain display delay measurement method in Example 1 of the present disclosure;

[0034] Figure 4 The schematic block diagram of the LED light curtain display delay measurement system. DETAILED DESCRIPTION

[0035] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0036] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0037] The term "and / or" herein is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can represent including any one or more elements selected from the set consisting of A, B, and C.

[0038] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present disclosure.

[0039] It can be understood that the above-mentioned various method embodiments mentioned in the present disclosure can be combined with each other to form a combined embodiment without violating the principle logic. Due to space limitations, the present disclosure will not go into details.

[0040] In addition, the present disclosure also provides an LED light curtain display delay measurement system, an electronic device, a computer-readable storage medium, and a program, all of which can be used to implement any LED light curtain display delay measurement method provided by the present disclosure. The corresponding technical solutions and descriptions are referred to the corresponding records in the method part and will not be repeated here.

[0041] The execution subject of the LED light curtain display delay measurement method may be a computer or other device capable of implementing the LED light curtain display delay measurement method. For example, the method may be executed by a terminal device or a server or other processing device, wherein the terminal device may be a user equipment (UE), a mobile device, a user terminal, a cellular phone, a cordless phone, a personal digital assistant (PDA), a handheld device, a computing device, a vehicle-mounted device, a wearable device, etc. In some possible implementations, the LED light curtain display delay measurement method may be implemented by a processor calling a computer-readable instruction stored in a memory.

[0042] Example 1

[0043] As one aspect of the embodiments of the present disclosure, a method for measuring the display delay of an LED light curtain is provided. Figure 1 As shown, the following steps are included:

[0044] S10, receiving an LED light curtain operation signal; the LED light curtain operation signal includes at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal;

[0045] S20, controlling a light sensing module capable of sensing the LED light curtain to obtain at least three high-definition images of the first LED light curtain at the same position at different times;

[0046] S30, based on the at least three first LED light curtain high-definition images, performing LED light curtain display delay identification; the at least three LED light curtain high-definition images include selected high-definition images when the LED light curtain changes and high-definition images showing stable display;

[0047] S40, based on the result of the LED light curtain display delay identification, obtaining the position of the LED lamp bead with display delay in the LED light curtain.

[0048] Based on the above configuration, the LED light curtain display delay measurement method of the embodiment of the present invention obtains a high-definition image signal of the LED light curtain according to the LED light curtain operation signal (that is, a switching signal of the light curtain color or brightness, etc.), and avoids errors in identifying problematic lamp beads due to non-ideal lighting environments according to the difference in light emission before and after the high-definition image and for the lamp bead array itself. In addition, the problematic lamp beads are identified based on the delay of the light curtain display to accurately locate the problematic lamp beads. This allows accurate measurement of display delays and identification of problematic lamp beads in non-ideal lighting environments, making it easier to partially replace the LED light curtain with lower maintenance costs.

[0049] The following takes the identification of display delay of an LED light curtain in an office building as an example, and describes in detail each step of the embodiment of the present disclosure.

[0050] S10, receiving an LED light curtain operation signal, wherein the LED light curtain operation signal includes at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal;

[0051] Among them, a portable device such as a high-definition industrial camera or a personal SLR camera is used to collect high-definition images of the LED light curtain. At night, the angle at which the high-definition industrial camera shoots the LED light curtain is preferably the light source emission direction of the noise light source to reduce the influence of stray light on the LED light curtain recognition.

[0052] Among them, the LED light curtain operation signal comes from the light curtain control module, such as Figure 2As shown, the light curtain control module has a timing function, that is, the display of the LED light curtain is switched at a certain time; this embodiment includes a variety of switching methods, including LED light curtain power-on signal, LED light curtain power-off signal, LED light curtain brightness change signal or LED light curtain color change signal, etc. For example, the LED light curtain is turned on at 8:00 in the evening (night has fallen in the area), and after setting the above-mentioned turn-on operation, the above-mentioned LED light curtain power-on signal including the turn-on time and turn-on operation information is sent to the control module that can control the light sensing module to shoot high-definition images (such as the mobile phone or controller that controls the above-mentioned light sensing module to start shooting, preferably a high-definition industrial camera that can communicate with and be controlled by the mobile phone). As another alternative to this embodiment, the light sensing module can also be manually turned on to implement subsequent operations after receiving the LED light curtain operation signal.

[0053] S20, controlling a light sensing module capable of sensing the LED light curtain to obtain at least three high-definition images of the first LED light curtain at the same position at different times;

[0054] Among them, the light sensing module, such as a high-definition industrial camera, can be controlled to take multiple high-definition images of the first LED light curtain at a certain angle, preferably set to continuous shooting mode, that is, after knowing the trigger time in the LED light curtain operation signal, the first 1s or 0.1s of the trigger time (selected according to the shooting speed of the light sensing module, that is, the shooting interval time) is used as the start time of the high-speed continuous shooting mode. Among them, a certain angle is preferably an angle with less light entering the interfering light source, especially to reduce the direct radiation of the strong interfering light source.

[0055] As a preferred embodiment, Figure 3 As shown, before controlling the light sensing module capable of sensing the LED light curtain to obtain no less than three high-definition images of the LED light curtain at the same position at different times, the method further includes: obtaining a second high-definition image of the LED light curtain before the operation signal of the LED light curtain is received, that is, the image captured before the trigger time in the LED light curtain operation signal.

[0056] Before performing the LED light curtain display delay recognition, the first LED light curtain high-definition image that is stable after the LED light curtain changes is used to perform interference light source analysis and denoise the at least three LED light curtain high-definition images to eliminate the interference of the LED light curtain display delay recognition. The at least three first LED light curtain high-definition images in S30 can be replaced with the corresponding light curtain high-definition images after denoising to reduce the interference of interference light sources or noise light sources.

[0057] Among them, the interference light source analysis and denoising of the said at least three LED light curtain high-definition images can be realized by using a method based on image block analysis, that is, firstly dividing the image into a certain number of equal-sized image blocks, and then selecting the image blocks that produce abnormal brightness in these decomposed image blocks in accordance with the rules, so as to exclude noise light sources such as light from office windows. Similarly, the influence of external lighting such as interference light sources on office buildings can be reduced; finally, the noise level is estimated based on the selected image blocks. Since the intensity change of image blocks is mainly caused by interference light sources or noise light sources, the common method of selecting image blocks is to find image blocks whose standard deviation of pixel values ​​is close to the minimum standard deviation, or to find some image blocks with weak textures. Since interference light sources or noise light sources rarely change instantaneously, principal component analysis can be used to estimate the noise level later.

[0058] S30, based on the at least three first LED light curtain high-definition images, performing LED light curtain display delay identification; the at least three LED light curtain high-definition images include selected high-definition images when the LED light curtain changes and high-definition images showing stable display;

[0059] In this embodiment, since the LED lamp beads in the LED light curtain (LED lamp bead array) are defined as problematic lamp beads when problems occur, such as reduced brightness, color difference or no light, the cause of the problematic lamp beads is the display delay (or premature display, unstable display, etc.) caused by the reduction or increase of the current flux therein, therefore, it is reflected in the entire LED light curtain that the display of the LED lamp beads at a certain position (or multiple positions) in the LED light curtain high-definition image obtained from the outside is delayed compared to other positions. Of course, it can also be identified when the LED light curtain displays stably, but it is easier to identify when the LED light curtain switches to different scenes. In addition, the LED light curtain images in different scenes can be compared to remove the interference of noise light sources or interference light sources (from the noise light source under the light curtain or from the interference light source from the outside). Therefore, no less than three LED light curtain high-definition images include the selected high-definition images when the LED light curtain produces changes and the high-definition images with stable display. This makes it easier to identify problematic lamp beads, and to identify problematic lamp beads with brightness problems or color problems when the display is stable. The preferred number of high-definition images of the LED light curtain is 6 to increase the probability of identifying lamp beads that display unstable displays such as flickering.

[0060] In some embodiments, acquiring at least three high-definition images of the first LED light curtain at the same location at different times includes:

[0061] The light sensing module is controlled to perform timed continuous shooting of the LED light curtain to obtain at least three high-definition images of the first LED light curtain, preferably high-speed timed continuous shooting to capture the display state before and after the LED light curtain switches modes.

[0062] As a preferred embodiment, when the LED light curtain operation signal includes an LED light curtain color change signal, the color of the LED light curtain before and after the color change is pure color. That is, when performing delayed display detection, the LED light curtain power-on signal, the LED light curtain power-off signal, the LED light curtain brightness change signal, or the LED light curtain color change signal before and after the corresponding LED light curtain color change signal are all pure colors, which makes it easier to denoise the interfering light source or the noise light source, and also facilitates the identification of problematic lamp beads with color or brightness problems.

[0063] As a preferred implementation, based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed, including:

[0064] The LED lamp beads with display delay are identified in sequence in no less than three first LED light curtain high-definition images; since multiple first LED light curtain high-definition images are used for identification, the probability of collecting problematic lamp beads with display delay is also increased, that is, the brightness or color of the same LED lamp bead in the first LED light curtain high-definition image is compared with the surrounding LED lamp beads. If its brightness or color is different from the surrounding LED lamp beads, the LED lamp bead is determined to be a problematic lamp bead; if its brightness or color is not different from the surrounding LED lamp beads, the LED light curtain operation signal is switched to realize the next round of LED light curtain display delay measurement. Among them, the LED lamp bead with display delay can be preliminarily identified as a problematic lamp bead, and the display delay can be identified through multiple first LED light curtain high-definition images to further confirm whether it is a problematic lamp bead. For example, if it is identified as a problematic lamp bead no less than twice after 6 identifications, it is determined to be a problematic lamp bead. When the problem lamp bead is not identified, the LED light curtain operation signal is switched, such as from the LED light curtain power-on signal to the LED light curtain power-off signal, and then from the LED light curtain power-on signal to the LED light curtain brightness change signal, and from the LED light curtain brightness change signal to the LED light curtain color change signal, that is, the identification of different dimensions of the LED light curtain's opening, closing, brightness change and color change is completed, that is, it can be identified whether the LED lamp beads can work normally under different working conditions.

[0065] S40, based on the result of the LED light curtain display delay identification, obtaining the position of the LED lamp bead with display delay in the LED light curtain.

[0066] In this embodiment, when the problematic lamp bead is obtained in S30, the position of the problematic lamp bead in the LED light curtain (or a light curtain array) is recorded at the same time, and the position of the LED lamp bead showing the delay in the LED light curtain is saved so that the maintenance personnel can export it to a table for replacement later.

[0067] Example 2

[0068] As another aspect of the present disclosure, a LED light curtain display delay measurement system 100 is provided. Figure 4 As shown, including:

[0069] An operation signal receiving unit 1 receives an LED light curtain operation signal;

[0070] The high-definition image acquisition unit 2 controls the light sensing module capable of sensing the LED light curtain to acquire at least three first LED light curtain high-definition images at the same position at different times; the LED light curtain operation signal includes at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal;

[0071] The display delay recognition unit 3 performs LED light curtain display delay recognition based on the at least three first LED light curtain high-definition images; the at least three LED light curtain high-definition images include the selected high-definition images when the LED light curtain changes and the high-definition images when the display is stable

[0072] The problematic lamp bead position determination unit 4 obtains the position of the LED lamp bead with display delay in the LED light curtain based on the result of the LED light curtain display delay identification.

[0073] In some embodiments, the LED light curtain displays a delay measurement method.

[0074] The following is a detailed description of each module in the embodiment of the present disclosure.

[0075] Among them, a portable device such as a high-definition industrial camera or a personal SLR camera is used to collect high-definition images of the LED light curtain. At night, the angle at which the high-definition industrial camera shoots the LED light curtain is preferably the light source emission direction of the noise light source to reduce the influence of stray light on the LED light curtain recognition.

[0076] In the operation signal receiving unit 1, the LED light curtain operation signal comes from the light curtain control module, such as Figure 2As shown, the light curtain control module has a timing function, that is, the display of the LED light curtain is switched at a certain time; this embodiment includes a variety of switching methods, including LED light curtain power-on signal, LED light curtain power-off signal, LED light curtain brightness change signal or LED light curtain color change signal, etc. For example, the LED light curtain is turned on at 8:00 in the evening (night has fallen in the area), and after setting the above-mentioned turn-on operation, the above-mentioned LED light curtain power-on signal including the turn-on time and turn-on operation information is sent to the control module that can control the light sensing module to shoot high-definition images (such as the mobile phone or controller that controls the above-mentioned light sensing module to start shooting, preferably a high-definition industrial camera that can communicate with and be controlled by the mobile phone). As another alternative to this embodiment, the light sensing module can also be manually turned on to implement subsequent operations after receiving the LED light curtain operation signal.

[0077] In the high-definition image acquisition unit 2, the light sensing module such as a high-definition industrial camera can be controlled to take multiple first LED light curtain high-definition images of the LED light curtain at a certain angle, preferably set to continuous shooting mode, that is, after knowing the trigger time in the LED light curtain operation signal, the first 1s or 0.1s of the trigger time (selected according to the shooting speed of the light sensing module, that is, the shooting interval time) is used as the start time of the high-speed continuous shooting mode. The certain angle is preferably an angle with less light entering the interfering light source, especially to reduce the direct radiation of the interfering light source with strong light intensity.

[0078] As a preferred embodiment, Figure 3 As shown, before controlling the light sensing module capable of sensing the LED light curtain to obtain no less than three high-definition images of the LED light curtain at the same position at different times, the method further includes: obtaining a second high-definition image of the LED light curtain before the operation signal of the LED light curtain is received, that is, the image captured before the trigger time in the LED light curtain operation signal.

[0079] Before the LED light curtain display delay recognition is performed, the first LED light curtain high-definition image that is stable after the LED light curtain changes is used to perform interference light source analysis and denoise the at least three LED light curtain high-definition images to eliminate the interference of the LED light curtain display delay recognition. The at least three first LED light curtain high-definition images in S30 can be replaced with the corresponding light curtain high-definition images after denoising to reduce the interference of interference light sources or noise light sources.

[0080] Among them, the interference light source analysis and denoising of the said at least three LED light curtain high-definition images can be realized by using a method based on image block analysis, that is, firstly dividing the image into a certain number of equal-sized image blocks, and then selecting the image blocks that produce abnormal brightness in these decomposed image blocks in accordance with the rules, so as to exclude noise light sources such as light from office windows. Similarly, the influence of external lighting such as interference light sources on office buildings can be reduced; finally, the noise level is estimated based on the selected image blocks. Since the intensity change of image blocks is mainly caused by interference light sources or noise light sources, the common method of selecting image blocks is to find image blocks whose standard deviation of pixel values ​​is close to the minimum standard deviation, or to find some image blocks with weak textures. Since interference light sources or noise light sources rarely change instantaneously, principal component analysis can be used to estimate the noise level later.

[0081] In the display delay identification unit 3, since the LED lamp beads in the LED light curtain (LED lamp bead array) are defined as problem lamp beads when problems occur, such as reduced brightness, color difference or no light, the cause of the problem lamp beads is the display delay (or premature display, unstable display, etc.) caused by the reduction or increase of the current flux therein, therefore, it is reflected in the entire LED light curtain that the display of the LED lamp beads at a certain position (or multiple positions) in the LED light curtain high-definition image obtained from the outside is delayed compared to other positions. Of course, it can also be identified when the LED light curtain displays stably, but it is easier to identify when the LED light curtain switches to different scenes. Moreover, the LED light curtain images in different scenes can be compared to remove the interference of noise light sources or interference light sources (from the noise light source under the light curtain or from the interference light source from the outside). Therefore, no less than three LED light curtain high-definition images include the selected high-definition images when the LED light curtain produces changes and the high-definition images with stable display. This makes it easier to identify problem lamp beads, and to identify problem lamp beads with brightness problems or color problems when the display is stable. The preferred number of high-definition images of the LED light curtain is 6 to increase the probability of identifying lamp beads that display unstable displays such as flickering.

[0082] In some embodiments, acquiring at least three high-definition images of the first LED light curtain at the same location at different times includes:

[0083] The light sensing module is controlled to perform timed continuous shooting of the LED light curtain to obtain at least three high-definition images of the first LED light curtain, preferably high-speed timed continuous shooting to capture the display state before and after the LED light curtain switches modes.

[0084] As a preferred embodiment, when the LED light curtain operation signal includes an LED light curtain color change signal, the color of the LED light curtain before and after the color change is pure color. That is, when performing delayed display detection, the LED light curtain power-on signal, the LED light curtain power-off signal, the LED light curtain brightness change signal, or the LED light curtain color change signal before and after the corresponding LED light curtain color change signal are all pure colors, which makes it easier to denoise the interfering light source or the noise light source, and also facilitates the identification of problematic lamp beads with color or brightness problems.

[0085] As a preferred implementation, based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed, including:

[0086] The LED lamp beads with display delay are identified in sequence in no less than three first LED light curtain high-definition images; since multiple first LED light curtain high-definition images are used for identification, the probability of collecting problematic lamp beads with display delay is also increased, that is, the brightness or color of the same LED lamp bead in the first LED light curtain high-definition image is compared with the surrounding LED lamp beads. If its brightness or color is different from the surrounding LED lamp beads, the LED lamp bead is determined to be a problematic lamp bead; if its brightness or color is not different from the surrounding LED lamp beads, the LED light curtain operation signal is switched to realize the next round of LED light curtain display delay measurement. Among them, the LED lamp bead with display delay can be preliminarily identified as a problematic lamp bead, and the display delay can be identified through multiple first LED light curtain high-definition images to further confirm whether it is a problematic lamp bead. For example, if it is identified as a problematic lamp bead no less than twice after 6 identifications, it is determined to be a problematic lamp bead. When the problem lamp bead is not identified, the LED light curtain operation signal is switched, such as from the LED light curtain power-on signal to the LED light curtain power-off signal, and then from the LED light curtain power-on signal to the LED light curtain brightness change signal, and from the LED light curtain brightness change signal to the LED light curtain color change signal, that is, the identification of different dimensions of the LED light curtain's opening, closing, brightness change and color change is completed, that is, it can be identified whether the LED lamp beads can work normally under different working conditions.

[0087] The LED light curtain display delay measurement system 100 implemented in this embodiment is preferably run in a control module or a server wirelessly connected to the control module. The control module can be run in a mobile phone or a notebook, so that the maintenance personnel can finally obtain the position of the LED lamp bead with display delay obtained in the problem lamp bead position determination unit 4. When the problem lamp bead is identified in the display delay identification unit 3, the position of the problem lamp bead in the LED light curtain (or a light curtain array) is recorded at the same time, and the position of the LED lamp bead with display delay in the LED light curtain is saved, so that the maintenance personnel can export it to a table for replacement later.

[0088] Example 3

[0089] This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the LED light curtain display delay measurement method in Embodiment 1 is implemented.

[0090] Embodiment 3 of the present disclosure is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0091] The electronic device may be in the form of a general-purpose computing device, for example, it may be a server device. The components of the electronic device may include, but are not limited to: at least one processor, at least one memory, and a bus connecting different system components (including the memory and the processor).

[0092] The bus includes data bus, address bus and control bus.

[0093] The memory may include volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM).

[0094] The memory may also include a program tool having a set (at least one) of program modules, such program modules including but not limited to: an operating system, one or more application programs, other program modules and program data, each of which or some combination may include the implementation of a network environment.

[0095] The processor executes various functional applications and data processing by running computer programs stored in the memory.

[0096] The electronic device can also communicate with one or more external devices (e.g., keyboard, pointing device, etc.). Such communication can be performed through an input / output (I / O) interface. In addition, the electronic device can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN) and / or public network, such as the Internet) through a network adapter. The network adapter communicates with other modules of the electronic device through a bus. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

[0097] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units / modules described above can be embodied in one unit / module. Conversely, the features and functions of one unit / module described above can be further divided into multiple units / modules to be embodied.

[0098] Example 4

[0099] This embodiment provides a computer-readable storage medium, which stores a computer program. When the program is executed by a processor, the steps of the LED light curtain display delay measurement method in Embodiment 1 are implemented.

[0100] The readable storage medium may include but is not limited to: a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical storage device, a magnetic storage device or any suitable combination of the above.

[0101] In a possible implementation, the present disclosure can also be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps of the LED light curtain display delay measurement method described in Example 1.

[0102] Among them, the program code for executing the present disclosure can be written in any combination of one or more programming languages, and the program code can be executed completely on the user device, partially on the user device, as an independent software package, partially on the user device and partially on a remote device, or completely on the remote device.

Claims

1. The LED light curtain display delay measurement method is characterized by: The steps include: Receive an LED light curtain operation signal; the LED light curtain operation signal includes at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal; the LED light curtain operation signal comes from a light curtain control module; The control module capable of controlling the light sensing module to capture high-definition images controls the light sensing module capable of sensing the LED light curtain to obtain at least three first LED light curtain high-definition images at the same position at different times based on the LED light curtain operation signal; Based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed; the at least three first LED light curtain high-definition images include selected high-definition images when the LED light curtain changes and high-definition images with stable display; Based on the result of the LED light curtain display delay identification, the position of the LED lamp bead with display delay in the LED light curtain is obtained; Before controlling the light sensing module capable of sensing the LED light curtain to obtain at least three first LED light curtain high-definition images at the same position at different times, the method further includes: obtaining a second LED light curtain high-definition image of the LED light curtain before the operation signal is received; Before the LED light curtain display delay recognition is performed, the interference light source analysis is performed on the first LED light curtain high-definition image that is stable after the LED light curtain changes, and the noise of the first LED light curtain high-definition images of at least three images is removed to eliminate the interference of the LED light curtain display delay recognition; the method based on image block analysis is adopted: firstly, the image is divided into a certain number of equal-sized image blocks, and then, in these decomposed image blocks, the image blocks with abnormal brightness are selected according to the rules to exclude the noise light source; the noise level is estimated according to the selected image blocks; After acquiring at least three first LED light curtain high-definition images at the same position at different times, before performing LED light curtain display delay identification, the following steps are also included: Determine the signal transmission position of the LED light curtain change, the signal transmission position is the signal transmission position before the LED light curtain realizes the switching of LED lamp beads in the entire light curtain after the display mode is switched; and exclude the LED lamp beads involved in the signal transmission position during delayed identification.

2. The LED light curtain display delay measurement method according to claim 1, characterized in that: Obtain no less than three high-definition images of the first LED light curtain at the same location at different times, including: The light sensing module is controlled to perform timed continuous shooting of the LED light curtain to obtain no less than three high-definition images of the first LED light curtain.

3. The LED light curtain display delay measurement method according to claim 1, characterized in that: When the LED light curtain operation signal includes an LED light curtain color change signal, the colors of the LED light curtain before and after the color change are both pure colors.

4. The LED light curtain display delay measurement method according to any one of claims 1 to 2, characterized in that: Based on the at least three first LED light curtain high-definition images, LED light curtain display delay identification is performed, including: Identify the LED lamp beads with display delay in no less than three first LED light curtain high-definition images in turn: compare the brightness or color of the same LED lamp bead in different first LED light curtain high-definition images with the surrounding LED lamp beads, if its brightness or color is different from the surrounding LED lamp beads, determine that the LED lamp bead is a problematic lamp bead; if its brightness or color is no different from the surrounding LED lamp beads, switch the LED light curtain operation signal to achieve the next round of LED light curtain display delay measurement.

5. LED light curtain display delay measurement system, characterized in that: include: An operation signal receiving unit receives an LED light curtain operation signal, wherein the LED light curtain operation signal includes at least one of the following operation signals: an LED light curtain power-on signal, an LED light curtain power-off signal, an LED light curtain brightness change signal, or an LED light curtain color change signal; the LED light curtain operation signal comes from a light curtain control module; A high-definition image acquisition unit, based on the LED light curtain operation signal, controls a light sensing module capable of sensing the LED light curtain to acquire at least three first LED light curtain high-definition images at the same position at different times; The display delay recognition unit performs LED light curtain display delay recognition based on the at least three first LED light curtain high-definition images; the at least three first LED light curtain high-definition images include selected high-definition images when the LED light curtain changes and high-definition images showing stable display A problem lamp bead position determination unit, which obtains the position of the LED lamp bead with display delay in the LED light curtain based on the result of the LED light curtain display delay identification; Before controlling the light sensing module capable of sensing the LED light curtain to obtain at least three first LED light curtain high-definition images at the same position at different times, the method further includes: obtaining a second LED light curtain high-definition image of the LED light curtain before the operation signal is received; Before the LED light curtain display delay recognition is performed, the interference light source analysis is performed on the first LED light curtain high-definition image that is stable after the LED light curtain changes, and the noise of the first LED light curtain high-definition images of at least three images is removed to eliminate the interference of the LED light curtain display delay recognition; the method based on image block analysis is adopted: firstly, the image is divided into a certain number of equal-sized image blocks, and then, in these decomposed image blocks, the image blocks with abnormal brightness are selected according to the rules to exclude the noise light source; the noise level is estimated according to the selected image blocks; After acquiring at least three first LED light curtain high-definition images at the same position at different times, and before performing LED light curtain display delay identification, the method further includes: Determine the signal transmission position of the LED light curtain change, the signal transmission position is the signal transmission position before the LED light curtain realizes the switching of LED lamp beads in the entire light curtain after the display mode is switched; and exclude the LED lamp beads involved in the signal transmission position during delayed identification.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the LED light curtain display delay measurement method according to any one of claims 1 to 4 is implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the LED light curtain display delay measurement method according to any one of claims 1 to 4 is implemented.

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