CN116343653A

CN116343653A - LED display screen adjusting system, method, equipment and readable storage medium

Info

Publication number: CN116343653A
Application number: CN202111608863.3A
Authority: CN
Inventors: 韩圣伟; 章琦杰; 蓝明华
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2023-06-27

Abstract

The application discloses LED display screen adjusting system, method, equipment and readable storage medium, the system includes LED display screen adjusting equipment, and LED display screen adjusting equipment is used for: when the LED display screen displays that the ghost phenomenon occurs, controlling the camera to shoot a display image, receiving the display image sent by the camera, calculating ghost adjustment parameters based on the display image, and sending the ghost adjustment parameters to the LED controller; the LED display screen, the LED display screen is used for: displaying a ghost test chart with balanced brightness; a camera, the camera for: shooting an LED display screen to obtain a display image, and sending the display image to LED display screen equipment; and an LED controller for: and in response to receiving the ghost adjustment parameters, adjusting display parameters arranged in a register of the LED display screen based on the ghost adjustment parameters so as to eliminate the ghost phenomenon of the LED display screen. The adjusting efficiency of adjusting the LED display screen is improved.

Description

LED display screen adjusting system, method, equipment and readable storage medium

Technical Field

The application relates to the technical field of LED display screens, in particular to an LED display screen adjusting system, an LED display screen adjusting method, an LED display screen adjusting device and a readable storage medium.

Background

With the development of LED (Light-Emitting Diode) display screen technology, the requirements of people on the use experience when using LED display screens are also increasing.

The LED display screen can have the ghost phenomenon in the use, specifically: the difference in the electrical characteristics of the LEDs (during the line scan or the column scan of the LED display screen) generates a parasitic capacitance, and a current in the parasitic capacitance flows through the turned-off LEDs, so that the LEDs are turned on slightly, and the LED display screen is abnormal, and referring to fig. 1, the display abnormality caused by the ghost phenomenon is shown at 101 in fig. 1.

The current solution to this ghosting phenomenon is: when the technician finds that the ghosting phenomenon appears on the display of the LED display screen, the degree of the ghosting phenomenon is determined through experience or feeling of the technician, and display parameters of the LED display screen are set according to the degree of the ghosting phenomenon. The display parameters obtained by the method are generally inaccurate, so that when the problem of ghost phenomenon of the display of the LED display screen is solved, the operation flow is complex, and a great deal of time is required.

Disclosure of Invention

The main purpose of the application is to provide an LED display screen adjusting system, an LED display screen adjusting method, an LED display screen adjusting device and a readable storage medium, and aims to solve the technical problem of how to improve the adjusting efficiency of an LED display screen.

To achieve the above object, the present application provides an LED display screen adjustment system, the system comprising:

the LED display screen adjusting device is used for: when the LED display screen displays that the ghost phenomenon occurs, controlling a camera to shoot a display image, receiving the display image sent by the camera, calculating a ghost adjustment parameter based on the display image, and sending the ghost adjustment parameter to an LED controller;

the LED display screen, the LED display screen is used for: displaying a ghost test chart with balanced brightness;

a camera for: shooting the LED display screen to obtain a display image, and sending the display image to the LED display screen equipment;

an LED controller for: and in response to receiving the ghost adjustment parameters, adjusting display parameters arranged in a register of the LED display screen based on the ghost adjustment parameters so as to eliminate the ghost phenomenon of the LED display screen.

Illustratively, in the ghost test chart, except for the pixel point with zero gray, the gray of other pixel points is greater than or equal to the preset gray;

and/or, the LED display screen adjusting device is specifically used for:

When the ghost phenomenon occurs in the display of the LED display screen, obtaining an adjustment quantitative value, wherein the adjustment quantitative value is obtained by quantitatively calibrating a register of the LED display screen;

calculating a ghost adjustment parameter based on the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen and the adjustment quantitative value, wherein the ghost lamp beads are the lamp beads lightened by the parasitic capacitance;

transmitting the ghost adjustment parameters to an LED controller so that the LED controller adjusts display parameters in a register of the LED display screen based on the ghost adjustment parameters;

and/or, the LED display screen adjusting device is further used for:

controlling a camera to shoot the LED display screen displaying the ghost testing chart to obtain a display image, wherein the ghost testing chart is constructed by preset information source chart making software;

determining whether the LED display screen has a ghost phenomenon or not based on the display image;

and/or, when determining whether the LED display screen has a ghost phenomenon based on the display image, the LED display screen adjusting apparatus is specifically configured to:

performing binarization processing on the display image to obtain a binarized image;

carrying out connected domain analysis on the binarized image to obtain a first number of a plurality of first connected domains in the binarized image;

Expanding the plurality of first communication domains in a preset direction to obtain an expanded binary image;

carrying out connected domain analysis on the expanded binary image to obtain a second number of a plurality of second connected domains in the expanded binary image;

determining whether a ghost phenomenon exists on the LED display screen based on the first quantity and the second quantity;

and/or, the LED display screen adjusting device is further used for:

determining a first position coordinate of the ghost lamp beads on the display image;

acquiring a plurality of second position coordinates of a plurality of pixel points in the connected domain corresponding to the first position coordinates;

acquiring a plurality of brightnesses on the plurality of second position coordinates in the display image;

determining the brightness of the ghost lamp beads based on the plurality of brightnesses, wherein the brightness of the ghost lamp beads is the brightness average value or the brightness median of the plurality of brightnesses;

and/or when the ghost phenomenon occurs in the display of the LED display screen, and the quantitative adjustment value is obtained, the LED display screen adjusting device is specifically used for:

when the LED display screen displays the ghost phenomenon, carrying out step adjustment on the register based on a preset step value, and determining brightness variation of the ghost lamp beads in a plurality of lamp beads arranged on the LED display screen to obtain an adjustment quantitative value;

And/or, when the register is a plurality of registers, each register has its own one adjustment quantitative value, and based on the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen, and the adjustment quantitative value, when calculating the ghost adjustment parameter, the LED display screen adjustment device is specifically configured to:

determining an adjustment order of the plurality of registers based on priorities of the plurality of registers;

traversing the plurality of registers based on the adjustment sequence, calculating the ghost adjustment subparameter based on adjustment quantitative values corresponding to the traversed registers and the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen, and taking the ghost adjustment subparameter corresponding to each register as the ghost adjustment parameter after the traversing is finished.

In order to achieve the above object, the present application provides an LED display screen adjusting method based on an LED display screen adjusting system, the method comprising:

And sending the ghost adjustment parameters to an LED controller so that the LED controller adjusts the display parameters in a register of the LED display screen based on the ghost adjustment parameters.

The method for obtaining the adjustment quantitative value before the ghost phenomenon occurs in the display of the LED display screen comprises the following steps:

and determining whether the LED display screen has a ghost phenomenon or not based on the display image.

Illustratively, the determining whether the LED display screen has a ghost phenomenon based on the display image includes:

And determining whether the LED display screen has a ghost phenomenon or not based on the first quantity and the second quantity.

Illustratively, before calculating the ghost adjustment parameter based on the brightness of the ghost lamp beads in the plurality of lamp beads of the LED display screen and the adjustment quantitative value, the method includes:

and determining the brightness of the ghost lamp beads based on the plurality of brightnesses, wherein the brightness of the ghost lamp beads is the brightness average value or the brightness median of the plurality of brightnesses.

Exemplary, when the ghost phenomenon occurs in the display of the LED display screen, the obtaining the adjustment quantitative value includes:

when the LED display screen displays the ghost phenomenon, the register is subjected to step adjustment based on a preset step value, and the brightness variation of the ghost lamp beads in the lamp beads arranged on the LED display screen is determined, so that an adjustment quantitative value is obtained.

Illustratively, the register is a plurality of registers, each register has its own one of the adjusting quantitative values, the calculating the ghost adjustment parameter based on the brightness of the ghost lamp beads among the plurality of lamp beads disposed on the LED display screen, and the adjusting quantitative values includes:

In order to achieve the above object, the present application further provides an LED display screen adjusting apparatus, which includes a memory, a processor, and an LED display screen adjusting program stored on the memory and executable on the processor, the LED display screen adjusting program implementing the steps of the LED display screen adjusting method as described above when executed by the processor.

For example, to achieve the above object, the present application further provides a computer-readable storage medium having stored thereon an LED display screen adjustment program that, when executed by a processor, implements the steps of the LED display screen adjustment method as described above.

Compared with the prior art, when the problem that the ghosting phenomenon occurs in the display of the LED display screen is solved, a technician determines the degree of the ghosting phenomenon through experience or feeling of the technician and sets the display parameters of the LED display screen according to the degree, the obtained display parameters are generally inaccurate, the operation flow is complex, and a great amount of time is required to be spent on adjusting the LED display screen, so that the adjustment efficiency of the LED display screen is low. The automatic adjustment process that the ghost adjustment parameters are calculated through the display images and the display parameters are adjusted through the ghost adjustment parameters is realized, the phenomenon that the degree of the ghost phenomenon is determined through experience or feeling of a technician and the display parameters of the LED display screen are set according to the degree of the ghost phenomenon is avoided, namely, the display parameters are not required to be determined manually, so that the adjustment process is simplified, the time spent in the adjustment process is reduced, and the adjustment efficiency of adjusting the LED display screen is improved.

Drawings

FIG. 1 is a schematic diagram of the ghosting phenomenon in the background of the present application;

FIG. 2 is a schematic diagram of an adjustment system for an LED display screen of the present application;

FIG. 3 is a schematic diagram of connected domains involved in the LED display screen adjustment system and the LED display screen adjustment method of the present application;

FIG. 4 is a schematic diagram of an expansion process of a connected domain according to the LED display screen adjustment system and the LED display screen adjustment method of the present application;

FIG. 5 is a schematic flow chart of a first embodiment of the LED display screen adjustment method of the present application;

FIG. 6 is a schematic flow chart of a second embodiment of the LED display screen adjustment method of the present application;

fig. 7 is a schematic structural diagram of a hardware running environment according to an embodiment of the present application.

The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The application provides an LED display screen adjusting system, refer to fig. 2, and fig. 2 is an adjusting schematic diagram of the LED display screen adjusting system.

The embodiment of the application also provides an embodiment of an LED display screen adjusting system, which comprises: the LED display screen adjusting device is used for: when the LED display screen displays that the ghost phenomenon occurs, controlling a camera to shoot a display image, receiving the display image sent by the camera, calculating a ghost adjustment parameter based on the display image, and sending the ghost adjustment parameter to an LED controller; the LED display screen, the LED display screen is used for: displaying a ghost test chart with balanced brightness; a camera for: shooting the LED display screen to obtain a display image, and sending the display image to the LED display screen equipment; an LED controller for: and in response to receiving the ghost adjustment parameters, adjusting display parameters arranged in a register of the LED display screen based on the ghost adjustment parameters so as to eliminate the ghost phenomenon of the LED display screen.

In this embodiment, the LED display screen is a flat panel display, which is composed of a plurality of LED module panels for displaying various information such as text, images, videos, video signals, and the like, wherein the LED module panels are composed of LED lattices.

Before the camera shoots the ghost test chart, camera parameters including focal length, exposure value and the like are required to be configured, and after shooting is completed, a display image shot by the camera can be transmitted to the LED display screen adjusting device through a communication network or can be transmitted to the LED display screen adjusting device through a data line. The configuration of the focal length can enable the display image to be clearer, and the problem that the ghost adjustment parameters are inaccurate when the LED display screen adjustment device calculates the ghost adjustment parameters through the display image is avoided; the configuration of the exposure value can adjust the overall brightness of the display image, if the overall brightness is dark, the coupled LED with the original dark brightness is mistaken to be unlit, so that the ghost adjustment parameter is inaccurate, if the overall brightness is bright, the reflection of some stray light such as a bonding pad is mistaken to be the lit LED, and the ghost adjustment parameter is inaccurate. Therefore, the camera parameters should be configured to be suitable values, and specifically configured according to the environmental adaptation, and the present embodiment is not particularly limited.

The LED display screen adjusting device comprises a computer, a mobile terminal and other devices with a logic operation function.

The LED controller is used for detecting the working state of the LED display screen (for example, detecting whether the LED display screen displays normally) and configuring the LED display screen (for example, adjusting display parameters).

The register (not shown) is used for storing display parameters and other data (such as related programs) related to the display of the LED display screen, and when the LED display screen executes a display task, the related processor acquires the display parameters and other data from the register to control the LED display screen to display.

The brightness balance refers to that the gray scale of each pixel point except for other pixel points with zero gray scale in the ghost test chart is the same, i.e. the brightness of each pixel point has the same brightness and darkness. When the LED display screen displays the ghost test chart, one LED corresponds to one pixel point, and certainly, under the condition that the number of LEDs on the LED display screen is enough, a plurality of LEDs can also correspond to one pixel point. It can be understood that the ghost test chart with balanced brightness is used, so that the influence of the unbalanced brightness of the display image on the calculation of the ghost adjustment parameters is avoided, the ghost adjustment parameters are more accurate, the ghost phenomenon of the display of the LED display screen is eliminated more accurately, the adjustment times are reduced, and the time spent in solving the ghost phenomenon of the display of the LED display screen is shortened.

The ghost test chart is a chart specially constructed by an LED display screen, an LED controller or preset information source composition software, referring to fig. 1, the ghost test chart actually collected is a chart of lighting single-row lamp beads at intervals, and a part 101 in fig. 1 is a ghost phenomenon generated below each single-row lamp bead, wherein the ghost phenomenon is generated when other lamp beads except the single-row lamp beads are lighted.

The actually collected test chart is an oblique test chart, i.e. the arrangement of the lit LEDs (light beads) is oblique to the right, and in addition, the test chart may be a oblique test chart, i.e. the arrangement of the lit LEDs (light beads) is oblique to the right, or the test chart includes both oblique test charts. The preset source composition software is software specifically designed for constructing a graph.

In one possible implementation manner, in the ghost test chart, except for the pixel point with the gray level of zero, the gray level of other pixel points is greater than or equal to the preset gray level.

In order to distinguish the background (the area where the pixel point with zero gray level is located) and the foreground (the area where the pixel point with non-zero gray level is located) of the LED display screen during display, the gray level of the pixel point in the foreground should be greater than or equal to the preset gray level, and in addition, the brightness of the LED with the ghost phenomenon is lower than that of the LED with the foreground, so that the fact that the gray level of the pixel point in the foreground is greater than or equal to the preset gray level is more beneficial to determining the LED with the ghost phenomenon, and the accuracy of calculating the ghost adjustment parameters of the LED display screen adjusting equipment is further improved. For example, the preset gray level is 128, specifically, the preset gray level may be set as required, and the embodiment is not particularly limited.

In one possible implementation, considering that the LED controller has a problem of not adjusting the display parameter in place when adjusting the display parameter by the ghost adjustment parameter, for example, the ghost adjustment parameter is 5, and the LED controller adjusts only 4.9 when adjusting the display parameter, that is, there is an adjustment error of 0.1; after the LED controller adjusts the display parameters through the ghost adjustment parameters, whether the ghost phenomenon existing in the LED display screen is eliminated or not is checked, if the ghost phenomenon still exists in the LED display screen, the ghost adjustment parameters are recalculated, the display parameters in the register of the LED display screen are adjusted through the recalculated ghost adjustment parameters, and the display parameters are checked again until the ghost phenomenon existing in the LED display screen is eliminated.

Exemplary, the LED display screen adjusting apparatus is specifically configured to:

when the LED display screen displays the ghost phenomenon, an adjustment quantitative value is obtained, wherein the adjustment quantitative value is obtained by quantitatively calibrating a register of the LED display screen.

The quantitative calibration is the process of calibrating the register in a quantitative mode, and the calibration is the numerical relation between the ghost adjustment parameter and the brightness of the ghost lamp beads. For example, the ghost adjustment parameter is a, the brightness of the ghost lamp beads is b, the adjustment quantitative value is c, and the relationship among a, b and c is satisfied: b=ac. By obtaining the value of b and the value of a, the value of c can be calculated.

The adjustment quantitative value is the attribute of the register itself, and represents the capability of adjusting the ghost phenomenon, and the adjustment quantitative value is different according to different registers.

The register is used for storing display parameters of the LED display screen and other data (such as a program related to display) related to the display of the LED display screen, and when the LED display screen executes a display task, the processor of the LED display screen can acquire the display parameters and other data from the register to control the LED display screen to display. Wherein, the lamp beads are LEDs, and the ghost lamp beads are the lamp beads which lead to the ghost phenomenon, and the lamp beads except the ghost lamp beads are normal lamp beads.

For example, the display parameters in the register are synchronously applied to each bead in the LED display screen, that is, when the display parameters in the register are changed, the beads in the LED display screen are changed globally and synchronously, but not part of the beads are changed.

In this embodiment, the preset step value is used to control the adjustment amplitude of the ghosting phenomenon by the ghosting adjustment parameter, the preset step value is proportional to the adjustment amplitude, and the preset step value is the minimum adjustment unit of the ghosting adjustment parameter, that is, the minimum ghosting adjustment parameter should not be smaller than the preset step value and is a multiple of the preset step value. For example, when the register R1 is quantitatively calibrated, the preset step value is 1, and when the register is stepwise adjusted, if the brightness variation of the ghost lamp beads is L1 after one step adjustment, L1 is the adjustment quantitative value corresponding to the register R1. The preset step value may be set as required, and the embodiment is not particularly limited.

And calculating a ghost adjustment parameter based on the brightness of the ghost lamp beads in the lamp beads of the LED display screen and the adjustment quantitative value, wherein the ghost lamp beads are lightened by a parasitic capacitor.

In this embodiment, the relationship between the ghost adjustment parameter a, the adjustment quantitative value L1 and the brightness A1 of the ghost lamp beads is the following equation: a1 =a×l1 (1). Note that, when the equation (1) is established, the ghost phenomenon is eliminated, and therefore, on the premise that A1 and L1 are known, the ghost adjustment parameter a can be obtained by the above equation (1).

In a possible embodiment, the register is a register, and the adjustment quantitative value and the ghost adjustment parameter are one, that is, the adjustment quantitative value is L1 in the foregoing example, and the ghost adjustment parameter is a in equation (1).

And/or, the register is a plurality of registers, each register has its own adjusting quantitative value (the adjusting quantitative value of each register can be obtained separately by the above quantitative calibration mode), each register also has its own ghost adjusting parameter, and when calculating the ghost adjusting parameter based on the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen, and the adjusting quantitative value, the LED display screen adjusting device is specifically configured to:

An adjustment order of the plurality of registers is determined based on the priorities of the plurality of registers.

In this embodiment, the registers with different priorities have different adjustment sequences, for example, there are registers R1, R2 and R3, and the priorities are R1> R2> R3, and the adjustment sequence is to adjust R1 first, then adjust R2, and then adjust R3. The adjustment quantitative values of the different registers are different, that is, the adjustment accuracy is different, for example, the accuracy of the register R1 is 10, the accuracy of the register R2 is 1, and the accuracy of the register R3 is 0.1.

In this embodiment, the plurality of registers are traversed by adjusting the sequence, and the ghost adjustment subparameter is calculated by adjusting the quantitative values corresponding to the traversed registers. Since a plurality of registers are involved, the above equation (1) is adjusted accordingly: a1 =a1×l1+a2×l2+ … … +ak×lk (2). Where k is the number of registers.

In one possible implementation, each register has its own one of the ghost adjustment parameters during the traversal, and if the ghost adjustment sub-parameters of all the traversed registers just can meet the above equation (2), it is explained that only the currently traversed registers can be adjusted to eliminate the ghost phenomenon, without continuing to traverse the remaining registers, and at this time, the traversal is finished, that is, when the traversal is finished, there is a possibility that the registers are not traversed. For example, k is 5, and after traversing to the third register and calculating a3, the equation is established, and the traversing is ended, that is, a1=a1×l1+a2×l2+a3×l3. For example a1=109.1, l1=10, l2=1, l3=0.1, a1=10, a2=9, a3=1.

In this embodiment, by sending the ghost adjustment parameter to the LED controller, and adjusting the register by the LED controller instead of directly adjusting the register, the LED controller replaces the current display parameter in the register with the ghost adjustment parameter when adjusting the register. It can be understood that when the register is a register, the current display parameter in the register is directly replaced by the ghost adjustment parameter; when the register is a plurality of registers, the current display parameters in each register are replaced by corresponding ghost adjustment subparameters respectively. It can be understood that the purpose of replacing the display parameters with the ghost adjustment parameters is to adjust the brightness of all the beads in the LED display screen, and make the brightness of all the ghost beads be zero or less than the brightness threshold, thereby eliminating the ghost phenomenon. The brightness threshold may be set according to the tolerance degree to the ghost phenomenon, specifically may be set according to needs, and the embodiment is not limited specifically.

In one possible implementation, the LED controller is configured to detect an operational state of the LED display screen (e.g., detect whether the LED display screen is displaying properly) and configure the LED display screen (e.g., adjust display parameters).

Compared with the prior art, when the problem of the ghost phenomenon caused by the display of the LED display screen is solved, a technician determines the degree of the ghost phenomenon through experience or feeling of the technician and sets the display parameters of the LED display screen according to the degree, the obtained display parameters are generally inaccurate, the operation flow is complicated, and a great deal of time is required to be spent, so that the adjustment efficiency of adjusting the LED display screen is low; calculating a ghost adjustment parameter based on the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen and the adjustment quantitative value, wherein the ghost lamp beads are the lamp beads lightened by the parasitic capacitance; and sending the ghost adjustment parameters to an LED controller so that the LED controller adjusts the display parameters in a register of the LED display screen based on the ghost adjustment parameters. According to the method and the device, when the ghost phenomenon occurs in the display of the LED display screen, the accurate ghost adjustment parameters are calculated by automatically obtaining the brightness of the ghost lamp beads, namely, the ghost adjustment parameters are changed along with the brightness of the ghost lamp beads, the brightness of the ghost lamp beads reflects the degree of the ghost phenomenon occurring in the display of the LED display screen, compared with the fact that the degree of the ghost phenomenon is determined manually through experience or feel, the brightness of the ghost lamp beads can more accurately reflect the degree of the ghost phenomenon, therefore, when the ghost adjustment parameters obtained through the brightness calculation of the ghost lamp beads are used for adjusting the display parameters of the LED display screen, the brightness of the ghost lamp beads can be more accurately adjusted, the ghost phenomenon occurring in the display of the LED display screen is eliminated, the adjustment times are reduced, the time spent when the problem of the ghost phenomenon occurring in the display of the LED display screen is solved is further reduced, and the adjustment efficiency of the LED display screen is improved.

And/or, the LED display screen adjusting device is further used for:

and controlling the camera to shoot the LED display screen displaying the ghost testing chart to obtain a display image, wherein the ghost testing chart is constructed by preset information source chart making software.

In this embodiment, camera parameters of the camera, including focal length and exposure value, are configured before shooting, so as to determine the brightness of the beads (including normal beads and ghost beads) of the LED display screen from the display image. The display image shot by the camera can be transmitted through a network or through a data line.

In a possible implementation manner, referring to fig. 2, after a display image captured by a camera is acquired, a ghost adjustment parameter is calculated based on the display image, and after the ghost adjustment parameter is determined, the ghost adjustment parameter is sent to the LED controller, so that the LED controller adjusts the display parameter of the LED display screen (applies the ghost adjustment parameter) based on the ghost adjustment parameter, that is, adjusts the display parameter in a register (not shown in the figure) storing the display parameter of the LED display screen based on the ghost adjustment parameter, so that the LED display screen displays an image through the modified display parameter, and further changes the brightness and the number of the ghost lamp beads of the LED display screen, so as to eliminate the ghost phenomenon existing in the LED display screen.

In the conventional method, the ghost test chart is constructed through the LED display screen or the LED controller, the construction process is complicated, and the ghost test chart is generated through the preset information source image forming software, so that the construction process of the ghost test chart is simpler and more convenient, and the preset information source image forming software is specially designed for constructing the chart.

and carrying out binarization processing on the display image to obtain a binarized image.

In this embodiment, if the display image is a black-and-white image or a color image, the color image is subjected to gradation processing to obtain the black-and-white image. The binarization processing is to process a black-and-white image with a plurality of gray scales into a binarized image with only two gray scales, and the principle is to set one contrast gray scale, set the gray scale of a pixel point with the gray scale larger than or equal to the contrast gray scale in the black-and-white image as the maximum gray scale, and set the gray scale of a pixel point with the gray scale smaller than the contrast gray scale in the black-and-white image as the minimum gray scale. For example, when the gray scale range of the black-and-white image is 0-255 and the contrast gray scale is 100, the gray scale of the pixel point with the gray scale greater than or equal to the contrast gray scale in the black-and-white image is 255, and the gray scale of the pixel point with the gray scale less than the contrast gray scale in the black-and-white image is 0, so as to obtain the binary image.

And carrying out connected domain analysis on the binarized image to obtain a first number of a plurality of first connected domains in the binarized image.

In this embodiment, the connected domain is an image region composed of foreground pixels having the same pixel value (gray scale) and adjacent positions, referring to fig. 3, 301 is a background, 302 is a connected domain, and the connected domain analysis is to find the first connected domain from the binarized image and calculate the first number of the first connected domains. The communication domain is a region of the lamp beads (including normal lamp beads and ghost lamp beads) in a lighting state in the binary image; the beads are soldered to the PCB (Printed Circuit Board ), i.e. the background is the area where the PCB is located.

Expanding the plurality of first communication domains in a preset direction to obtain an expanded binary image.

In this embodiment, the plurality of first connected domains are inflated by the image inflation algorithm, referring to fig. 4, 401 is a binarized image that has not yet been inflated, 402 is a binarized image during inflation, and 403 is a binarized image after inflation, wherein the plurality of first connected domains are inflated in the arrow direction (vertical direction) in 402 (only the inflation process of one connected domain corresponding to a normal lamp bead and one connected domain corresponding to a ghost lamp bead is shown, and the inflation process of other connected domains is similar).

In one possible implementation, the preset direction may be a horizontal direction in addition to a vertical direction, and specifically depends on a scanning manner of the driving chip in the LED display screen, that is, when the scanning manner is a line scanning, the preset direction is a horizontal direction, and when the scanning direction is a column scanning, the preset direction is a vertical direction.

And carrying out connected domain analysis on the expanded binary image to obtain a second number of a plurality of second connected domains in the expanded binary image.

In the present embodiment, similarly to the calculation process of the first number, referring to fig. 4, the second number is the number of the second communicating domain in 403.

In this embodiment, if the ratio of the second number to the first number is smaller than 1 (i.e., determining the size relationship between the first number and the second number), it may be determined that a connected domain corresponding to the ghost lamp beads exists in the binarized image, that is, it may be determined that the ghost phenomenon occurs in the display of the LED display screen; if the ratio of the second quantity to the first quantity is equal to 1, it can be determined that the connected domain corresponding to the ghost lamp beads does not exist in the binarized image, and it can be determined that the LED display screen does not have the ghost phenomenon.

And/or, the LED display screen adjusting device is further used for:

in this embodiment, when the light bead is turned on, the brightness of the corresponding pixel point of the light bead on the display image is higher than the brightness of the corresponding pixel point of the light bead which is not turned on the display image, and in addition, the light bead is turned on in an area other than the position where only the light bead is turned on, and in this area, the position where the light bead is turned on is the brightest, and as the distance from the light bead is further and further, the brightness is lower and further. Because the lamp beads are arranged in an array on the LED scanning block, a plurality of lamp beads exist on the row or the column where one lamp bead is positioned on the display image; therefore, the sum of the brightness of each row of pixels and the sum of the brightness of each column of pixels on the display image are calculated respectively, and the peak value of the sum of the brightness of each row of pixels (the row where the lamp beads are positioned) and the peak value of the sum of the brightness of each column of pixels (the column where the lamp beads are positioned) are found, so that the position where the lighted lamp beads are positioned can be determined. It can be understood that, since the LED display screen is composed of a plurality of rows and a plurality of columns of light beads, the peak value of the sum of the brightness of each row of pixels is plural, and the peak value of the sum of the brightness of each column of pixels is plural, wherein the intersection point of the row where the peak value is located and the column where the peak value is located is the location where the light bead is located.

It should be noted that, when the ghost test chart is constructed, the positions of the normal beads are already determined, for example, the normal beads include a bead 1 and a bead 2, wherein the bead 1 is a bead of a 3 rd row and a 5 th column in the LED display screen, and the bead 2 is a bead of a 4 th row and a 4 th column.

After the positions of the normal lamp beads are eliminated, the positions of the residual lighted lamp beads are the first positions of the ghost lamp beads on the display image, and the first position coordinates of the first positions are determined.

and acquiring a plurality of brightnesses on the plurality of second position coordinates in the display image.

In the present embodiment, a plurality of second position coordinates are determined in the binarized image, and since the luminance in the binarized image is not true luminance, the luminance in the display image is true luminance, and thus a plurality of luminances need to be acquired from the display image.

In this embodiment, when the connected domain is one, the average brightness value or the median brightness value of the plurality of brightnesses is the ghost lamp corresponding to the connected domain The brightness of the beads, e.g. a plurality of 4, each 1000cd/m ² 、1001cd/m ² 、1002cd/m ² And 1003cd/m ² The average brightness value is 1002cd/m ² The median of brightness is (1001 cd/m) ² +1002cd/m ² )/2＝1001.5cd/m ² I.e. the brightness of the ghost lamp beads is 1002cd/m ² Or 1001.5cd/m ² 。

When the number of the connected domains is plural, the brightness of the corresponding ghost lamp beads of each connected domain is calculated independently according to the calculation mode when the number of the connected domains is one, namely, the brightness of the corresponding ghost lamp beads of the connected domain is calculated only by the brightness of the corresponding ghost lamp beads of the connected domain, and the brightness of other ghost lamp beads is not calculated.

According to the embodiment, whether the LED display screen has the ghost phenomenon is determined through displaying the image, instead of manually determining the brightness of the lamp beads of the LED display screen according to the feeling, whether the LED display screen has the ghost phenomenon is determined according to the brightness, misjudgment of manual determination of whether the LED display screen has the ghost phenomenon is avoided, and compared with the ghost adjustment parameters manually set through experience, the obtained ghost adjustment parameters are more accurate.

The application further provides an LED display screen adjusting method, and referring to fig. 5, fig. 5 is a flow chart of the LED display screen adjusting method.

The present embodiments also provide embodiments of LED display screen adjustment methods, it being noted that although a logic sequence is shown in the flow diagrams, in some cases the steps shown or described may be performed in a different order than that shown or described herein. The method for adjusting the LED display screen can be applied to equipment with a logic operation function such as a computer and a mobile terminal, and for convenience of description, each step of executing the main body description of the method for adjusting the LED display screen is omitted, and the method for adjusting the LED display screen comprises the following steps:

Step S110, when the ghost phenomenon occurs in the display of the LED display screen, obtaining an adjustment quantitative value, wherein the adjustment quantitative value is obtained by quantitatively calibrating a register of the LED display screen.

In a possible implementation manner, when the ghost phenomenon occurs in the display of the LED display screen, the obtaining the adjustment quantitative value includes:

step a, when the ghost phenomenon occurs in the display of the LED display screen, performing step adjustment on the register based on a preset step value, and determining brightness variation of the ghost lamp beads in the lamp beads arranged on the LED display screen to obtain an adjustment quantitative value.

And step S120, calculating a ghost adjustment parameter based on the brightness of the ghost lamp beads in the lamp beads arranged on the LED display screen and the adjustment quantitative value, wherein the ghost lamp beads are the lamp beads lightened by the parasitic capacitance.

In one possible implementation manner, the register is a plurality of registers, each register has its own one adjustment quantitative value (the adjustment quantitative value of each register can be obtained separately by the above quantitative calibration mode), each register also has its own one ghost adjustment parameter, and the calculating the ghost adjustment parameter based on the brightness of the ghost lamp beads in the plurality of lamp beads provided on the LED display screen, and the adjustment quantitative value includes:

And step b, determining the adjustment sequence of the plurality of registers based on the priorities of the plurality of registers.

And c, traversing the plurality of registers based on the adjustment sequence, calculating a ghost adjustment subparameter based on adjustment quantitative values corresponding to the traversed registers and the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen, and taking the ghost adjustment subparameter corresponding to each register as a ghost adjustment parameter after the traversing is finished.

And step S130, sending the ghost adjustment parameters to an LED controller so that the LED controller adjusts the display parameters in a register of the LED display screen based on the ghost adjustment parameters.

In a possible implementation manner, referring to fig. 6, based on the first embodiment of the method for adjusting an LED display screen of the present application, a second embodiment is provided, where before obtaining an adjustment quantitative value when a ghost phenomenon occurs on the LED display screen, the method includes:

step S210, controlling a camera to shoot the LED display screen displaying the ghost test chart to obtain a display image, wherein the ghost test chart is constructed by preset source chart making software.

Referring to fig. 1, the actually collected test chart is a chart of lighting single-row beads spaced from each other, and a portion 101 in fig. 1 is a ghost phenomenon generated under each single-row bead, where the ghost phenomenon is generated when other beads except the single-row bead are lighted.

The actually collected test chart is an oblique test chart, i.e. the arrangement of the lit LEDs (light beads) is oblique to the right, and in addition, the test chart may be a oblique test chart, i.e. the arrangement of the lit LEDs (light beads) is oblique to the right, or the test chart includes both oblique test charts.

Step S220, determining whether the LED display screen has a ghost phenomenon or not based on the display image;

in a possible implementation manner, the determining whether the LED display screen has a ghost phenomenon based on the display image includes:

And d, performing binarization processing on the display image to obtain a binarized image.

And e, carrying out connected domain analysis on the binarized image to obtain a first number of a plurality of first connected domains in the binarized image.

F, expanding the plurality of first communication domains in a preset direction to obtain an expanded binarized image.

And g, carrying out connected domain analysis on the expanded binary image to obtain a second number of a plurality of second connected domains in the expanded binary image.

And h, determining whether the LED display screen has a ghost phenomenon or not based on the first quantity and the second quantity.

In one possible implementation manner, before calculating the ghost adjustment parameter based on the brightness of the ghost lamp beads in the plurality of lamp beads disposed on the LED display screen and the adjustment quantitative value, the method includes:

step i, determining a first position coordinate of the ghost lamp beads on the display image;

Step j, obtaining a plurality of second position coordinates of a plurality of pixel points in the connected domain corresponding to the first position coordinates;

and step k, obtaining a plurality of brightnesses on the plurality of second position coordinates in the display image.

And step l, determining the brightness of the ghost lamp beads based on the brightness, wherein the brightness of the ghost lamp beads is the brightness average value or the brightness median of the brightness.

In this embodiment, when the connected domain is one, the average brightness value or the median brightness of the plurality of brightnesses is the brightness of the ghost lamp beads corresponding to the connected domain, for example, the plurality of brightnesses is 4, and each brightness is 1000cd/m ² 、1001cd/m ² 、1002cd/m ² And 1003cd/m ² The average brightness value is 1002cd/m ² The median of brightness is (1001 cd/m) ² +1002cd/m ² )

/2＝1001.5cd/m ² I.e. the brightness of the ghost lamp beads is 1002cd/m ² Or 1001.5cd/m ² 。

Exemplary, the present application further provides an LED display screen adjusting device, including:

the first acquisition module is used for acquiring an adjustment quantitative value when the ghost phenomenon occurs in the display of the LED display screen, wherein the adjustment quantitative value is obtained by quantitatively calibrating a register of the LED display screen;

The calculation module is used for calculating ghost adjustment parameters based on the brightness of the ghost lamp beads in the lamp beads arranged on the LED display screen and the adjustment quantitative value, wherein the ghost lamp beads are the lamp beads lightened by the parasitic capacitance;

and the sending module is used for sending the ghost adjustment parameters to the LED controller so that the LED controller can adjust the display parameters in the register of the LED display screen based on the ghost adjustment parameters.

Illustratively, the LED display screen adjusting apparatus further includes:

the control module is used for controlling the camera to shoot the LED display screen displaying the ghost testing chart to obtain a display image, wherein the ghost testing chart is constructed by preset information source chart making software;

and the first determining module is used for determining whether the LED display screen has a ghost phenomenon or not based on the display image.

Illustratively, the first determining module includes:

the binarization unit is used for carrying out binarization processing on the display image to obtain a binarized image;

the first analysis unit is used for carrying out connected domain analysis on the binarized image to obtain a first number of a plurality of first connected domains in the binarized image;

An expansion unit, configured to expand the plurality of first communication domains in a preset direction, to obtain an expanded binarized image;

a second analysis unit, configured to perform connected domain analysis on the expanded binary image, to obtain a second number of a plurality of second connected domains in the expanded binary image;

and the first determining unit is used for determining whether the LED display screen has a ghost phenomenon or not based on the first quantity and the second quantity.

Illustratively, the LED display screen adjusting apparatus further includes:

the second determining module is used for determining a first position coordinate of the ghost lamp bead on the display image;

the second acquisition module is used for acquiring a plurality of second position coordinates of a plurality of pixel points in the connected domain corresponding to the first position coordinates;

a third obtaining module, configured to obtain a plurality of brightnesses at the plurality of second position coordinates in the display image;

and the third determining module is used for determining the brightness of the ghost lamp beads based on the brightness, wherein the brightness of the ghost lamp beads is the brightness average value or the brightness median of the brightness.

Illustratively, the first acquisition module includes:

And the second determining unit is used for carrying out step-by-step adjustment on the register based on a preset step value when the ghost phenomenon occurs in the display of the LED display screen, determining the brightness variation of the ghost lamp beads in the lamp beads arranged on the LED display screen, and obtaining an adjustment quantitative value.

Illustratively, the register is a plurality of registers, each having its own one of the adjustment quantitative values, and the calculation module includes:

a third determining unit configured to determine an adjustment order of the plurality of registers based on priorities of the plurality of registers;

and the traversing unit is used for traversing the plurality of registers based on the adjustment sequence, calculating the ghost adjustment subparameter based on the adjustment quantitative value corresponding to the traversed registers and the brightness of the ghost lamp beads in the plurality of lamp beads arranged on the LED display screen, and taking the ghost adjustment subparameter corresponding to each register as the ghost adjustment parameter after the traversing is finished.

The specific implementation manner of the adjusting device for the LED display screen is basically the same as that of each embodiment of the adjusting method for the LED display screen, and is not repeated here.

In addition, the application also provides LED display screen adjusting equipment. As shown in fig. 7, fig. 7 is a schematic structural diagram of a hardware operating environment (except the above-mentioned master controller, slave controller, and cellular network module) according to an embodiment of the present application.

In one possible implementation, fig. 7 may be a schematic structural diagram of a hardware operating environment of the LED display screen adjusting device.

As shown in fig. 7, the LED display screen adjusting apparatus may include a processor 701, a communication interface 702, a memory 703 and a communication bus 704, wherein the processor 701, the communication interface 702 and the memory 703 complete communication with each other through the communication bus 704, and the memory 703 is used for storing a computer program; the processor 701 is configured to implement the steps of the LED display screen adjustment method when executing the program stored in the memory 703.

The communication bus 704 mentioned by the LED display screen adjusting device may be a Peripheral component interconnect standard (Peripheral ComponentInterconnect, PCI) bus or an extended industry standard architecture (Extended Industry StandardArchitecture, EISA) bus, etc. The communication bus 704 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, the figures are shown with only one bold line, but not with only one bus or one type of bus.

The communication interface 702 is used for communication between the LED display screen adjustment device and other devices described above.

The Memory 703 may include a random access Memory (Random Access Memory, RMD) or may include a Non-Volatile Memory (NM), such as at least one disk Memory. Optionally, the memory 703 may also be at least one storage device located remotely from the aforementioned processor 701.

The processor 701 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

The specific implementation manner of the LED display screen adjusting device is basically the same as that of each embodiment of the LED display screen adjusting method, and is not repeated here.

In addition, the embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores an LED display screen adjusting program, and the LED display screen adjusting program realizes the steps of the LED display screen adjusting method when being executed by a processor.

The specific implementation manner of the computer readable storage medium is basically the same as the above embodiments of the method for adjusting an LED display screen, and will not be repeated here.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, a device, or a network device, etc.) to perform the method described in the embodiments of the present application.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims

1. An LED display screen adjustment system, the system comprising:

2. The system according to claim 1, wherein the gray level of the other pixels in the ghost test chart except for the pixel having zero gray level is greater than or equal to a preset gray level;

and/or, the LED display screen adjusting device is specifically used for:

and/or, the LED display screen adjusting device is further used for:

3. An LED display screen adjustment method based on an LED display screen adjustment system, the method comprising:

4. The method of claim 3, wherein before obtaining the adjustment quantitative value when the LED display screen displays the ghost phenomenon, the method comprises:

5. The method of claim 4, wherein determining whether a ghosting phenomenon exists on the LED display screen based on the display image comprises:

6. The method of claim 5, wherein the calculating the ghost adjustment parameter based on the brightness of a ghost lamp bead of the plurality of lamp beads disposed on the LED display screen and the adjustment quantitative value comprises:

7. The method of claim 3, wherein obtaining the adjustment quantitative value when the LED display screen displays the ghost phenomenon comprises:

8. The method of claim 3, wherein the register is a plurality of registers, each register having its own one adjustment quantitative value, wherein the calculating the ghost adjustment parameter based on the brightness of a ghost lamp bead of the plurality of lamp beads disposed on the LED display screen, and the adjustment quantitative values, comprises:

9. An LED display screen adjustment device, characterized in that it comprises a memory, a processor and an LED display screen adjustment program stored on the memory and executable on the processor, which LED display screen adjustment program, when executed by the processor, implements the steps of the LED display screen adjustment method according to any of claims 3 to 8.

10. A computer-readable storage medium, on which an LED display screen adjustment program is stored, which when executed by a processor implements the steps of the LED display screen adjustment method according to any one of claims 3 to 8.