CN113380187A - Method and system for detecting and correcting brightness and color difference of LED display screen - Google Patents
Method and system for detecting and correcting brightness and color difference of LED display screen Download PDFInfo
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- CN113380187A CN113380187A CN202110874635.4A CN202110874635A CN113380187A CN 113380187 A CN113380187 A CN 113380187A CN 202110874635 A CN202110874635 A CN 202110874635A CN 113380187 A CN113380187 A CN 113380187A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30168—Image quality inspection
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Abstract
The invention discloses a system for detecting and correcting the brightness and color difference of an LED display screen, which comprises the LED display screen, an LED display screen position adjusting module, a data acquisition module, a central processing unit and a light supplementing device, wherein the LED display screen position adjusting module comprises an LED display screen moving device and an LED display screen rotating device, the data acquisition module comprises an environment sensor, arm and camera, LED display screen connects LED display screen rotating device, LED display screen mobile device sets up in LED display screen inside and be located the LED display screen rear, LED display screen mobile device opens work, central processing unit and LED display screen position adjustment module, bright colourity correction module, light filling device and data processing module are connected, analysis processes and sends operating instruction to each device module, the arm is installed in LED display screen top, the camera links to each other with the arm, can improve the rate of accuracy and the detection efficiency of the bright colourity correction of LED display screen.
Description
Technical Field
The invention relates to the technical field of LED display screens, in particular to a method and a system for detecting and correcting brightness and color difference.
Background
The LED display screen is a novel information display medium which is rapidly developed in the world, utilizes a dot matrix module formed by light emitting diodes to obtain an area display screen formed by pixel units, has the characteristics of high reliability, strong environment adaptability, high price performance ratio, low use cost and the like, rapidly grows into a mainstream product of flat panel display in short and short decades, and is widely applied to the field of information display.
Due to the rapid development of LED technology and cost reduction, LED display screens have been used in many applications, and are widely used indoors and outdoors, such as in enterprise bulletin boards, sporting events, outdoor advertising, and the like. Heretofore, these LED display devices have been mainly used for displaying natural images and moving images of moving pictures. In recent years, the pixel pitch has become narrower and the visible range has become shorter, and accordingly, the LED display device is used in conference rooms, monitoring applications, and the like. Particularly for monitoring purposes, LED display devices display PC images in a manner close to still images in many cases.
However, the LED display panel has a common disadvantage that the luminance and color of the pixels are changed due to the change of the luminance with the increase of the illumination time, which affects the display effect. The LED display screen is formed by splicing a plurality of LED lamps, but since each LED lamp has different luminance and chrominance differences, even if they are of the same type, the luminance and chrominance differences are high, and the display effect of the LED display screen is seriously affected.
The method of application No. CN201410188622.1 is the closest prior art, and discloses a method for correcting brightness and chrominance of an LED display screen and an LED display screen system that can be used in the method. Different from the traditional LED display screen brightness and chrominance correction method, the brightness and chrominance correction method is directly installed in an LED display screen control system, and the shooting function of the existing monitoring camera in the LED display screen system is combined, so that the imaging quality analysis can be performed in the whole process of LED display screen brightness and chrominance correction, the parameters of the monitoring camera can be adjusted in real time, the correction picture displayed by the LED display screen is shot and analyzed to generate the brightness and chrominance correction coefficient of the LED display screen, and finally the brightness and chrominance correction is performed according to the correction coefficient. The method utilizes the existing monitoring camera resource in the LED display screen system, and can realize the brightness and chrominance correction of the LED display screen without manual intervention.
However, the above invention is ideally performed, ignoring the problems encountered in real-world applications: on one hand, the taken picture is unqualified due to the uncertainty of the environment: for example, the partial area of the LED display screen is blocked by leaves, paper sheets and the like, so that the picture of the required picture cannot be shot; when the weather of rain, snow and fog occurs, the shooting of the camera is influenced; when the camera is shielded from sight by obstacles such as branches, the camera cannot adjust the position, the posture and the like of the camera, so that the picture meeting the conditions cannot be shot, and on the other hand, the shot picture cannot be used as the standard of color brightness contrast analysis due to the limitation of the equipment per se: if the camera device cannot move during shooting, shooting blind spots appear at the positions of the LED display screen; the camera device in the invention has no corresponding light supplementing device, and the problem of insufficient exposure degree can occur during shooting, so that the shot picture can not accurately reflect the brightness of the LED lamp. The above situation, but not limited to, will cause the shot picture not to meet the standard of the bright-chroma contrast analysis, and the effective bright-chroma correction cannot be performed. Finally, manual intervention is needed, which causes waste of manpower, material resources and financial resources.
Disclosure of Invention
Aiming at the problems that the pictures shot under the special environmental conditions do not accord with the detection standard and the manpower and financial resources are wasted, the invention has the first invention point that: the method for detecting and correcting the brightness and the color difference of the LED display screen and the LED display screen system have the characteristics of accuracy and timeliness of identification, strong environmental interference resistance and the like.
The idea of the invention is that:
the technical problem needs to be solved, and the LED display screen system needs to intelligently judge the shooting environment without human intervention, perform targeted adjustment, shoot qualified photos and perform comparative analysis on the photos.
Aiming at the above influencing factors, the effect of the LED display screen or the camera cannot be well solved. Inspired by modes of the Internet of things, a cooperative platform and the like. Correspondingly, a linkage mode of the LED display screen and the camera is set, and an LED display screen system is established. If the LED display screen system has the recognition function, different responses are made according to different recognized conditions, the capability of coping with the influence of external environment factors is improved, qualified photos are shot, and manpower, material resources, financial resources and the like are saved.
According to the invention concept, the invention provides a method for detecting and correcting the brightness and the color difference of an LED display screen and an LED display screen system. Through the reasonable combination of the photographing system consisting of the LED display screen rotating device, the LED display screen moving device, the environment sensor, the central processing unit, the light supplementing device, the mechanical arm and the camera and the brightness and chroma correction software arranged in the central processing unit, in the brightness and chroma correction process of the LED display screen, various problems encountered can be accurately identified, response is made, a corresponding processing mechanism is started, the purpose of finishing brightness and chroma correction is achieved, and the waste problem of manpower, material resources and financial resources is solved.
According to the inventive concept, the invention provides a method and a system for detecting and correcting the brightness and color difference of an LED display screen, and the specific scheme is as follows:
the invention provides a system for detecting and correcting the brightness and the color difference of an LED display screen, which comprises:
the LED display screen comprises an LED display screen, an LED display screen position adjusting module, a data acquisition module, a central processing unit and a light supplementing device. The LED display screen position adjusting module comprises an LED display screen moving device and an LED display screen rotating device; the data acquisition module comprises an environmental sensor, a mechanical arm and a camera.
The LED display screen is externally connected with an LED display screen rotating device and is positioned behind the LED display screen, and when the photographing quality is influenced in rainy and snowy weather, the LED display screen can be driven to rotate at a proper angle, so that the photographing environment meets the requirements;
the LED display screen moving device is arranged in the LED display screen and is positioned behind the LED display screen, when the LED display screen is polluted or scratched or shooting is influenced by an obstacle, the LED display screen moving device is started to work, and an area needing to be detected is moved to an unaffected area to be shot;
the central processing unit is arranged in the LED display screen, connected with the LED display screen position adjusting module, the brightness and chrominance correcting system, the light supplementing device and the data processing module, and used for receiving the instructions sent by the device modules, analyzing and processing the instructions and sending operation instructions to the device modules.
The mechanical arm is arranged above the LED display screen, the camera is connected with the mechanical arm, and the mechanical arm can move to a reasonable shooting position according to an instruction to shoot;
the light supplementing device is arranged above the camera and is started when the environment is dark, so that the light supplementing effect is achieved;
the environment sensor is arranged on the mechanical arm and below the camera, senses external environment conditions such as rain and snow weather, heavy fog weather, clear weather and the like before pictures are taken, and transmits the information to the central processing unit;
and the brightness and chrominance correction system is responsible for comparing and analyzing the pictures sent by the processor to generate an LED display screen correction coefficient and correcting the LED display screen.
As a preferable mode of the invention, a defogging shooting mode is set in the camera, and the camera is started in the heavy fog or haze weather so as to improve the imaging quality.
As a preferred mode of the present invention, the light supplement device is an LED light emitting body, and the lamp post is annular. The light supplementing device is located inside the mechanical arm in the non-light supplementing mode, and stretches out to supplement light in the light supplementing mode.
The invention has the advantages that: the method can accurately identify various problems affecting the shooting quality in the shooting process, respond to the various problems, start a corresponding processing mechanism, enable the shooting environment and the picture quality to meet the requirements, and smoothly and accurately finish the brightness and chroma correction. The method has the characteristics of high identification accuracy, instantaneity, strong environmental interference resistance and the like.
Based on the first invention, the invention further provides a second invention, wherein the mechanical arm in the data acquisition module is of a telescopic structure, can be retracted above the LED display screen in a non-working state, and can be stretched and moved in a working process.
The invention has the advantages that: the mechanical arm can avoid the barrier, and is ensured to be attractive and practical.
Based on the first invention, the invention further provides a third invention, and according to an aspect of the application, a method for detecting and correcting the bright color difference of the LED display screen is provided, which specifically comprises the following steps:
s1: the central processing unit sends an instruction to control the LED display screen to display a color picture for correction;
s2: the central processing unit sends an instruction to wake up the data acquisition module, the data acquisition module detects a shooting environment and sends a detection result to the central processing unit;
s3: the central processing unit analyzes and processes the information sent by the data acquisition module and sends a detection result to each component module;
s4: each component module receives the signal and responds to the signal, and the operation required by each device module is carried out;
s5: the central processing unit sends out an instruction to instruct the camera to shoot the color picture for correction after the parameters are adjusted to the parameter target value so as to obtain a color image for correction, and the color image for correction is transmitted to the central processing unit;
s6: the central processing unit sends the image to the brightness and chrominance correction system to carry out brightness and chrominance correction;
s7: the brightness and chrominance correction software analyzes and processes the color image for correction sent by the central processing unit, calculates the brightness and chrominance correction coefficients of the LED lamp points and sends the brightness and chrominance correction coefficients to the central processing unit;
s8: and the central processing unit corrects the brightness and the chroma of the LED display screen according to the received brightness and chroma correction coefficient.
Preferably, in the method for detecting and correcting the brightness and the color difference of the LED display screen, the time interval and the specific time for detecting the brightness and the color difference of the LED display screen may be preset. The detection time of the brightness and the chromaticity of the LED display screen can be set in the early morning when pedestrians, vehicles and various social activities are relatively few.
Preferably, the method for detecting and correcting the brightness and the color difference of the LED display screen may be set before five minutes from the brightness and color detection time point, and the central processing unit wakes up each component and enters a standby state.
The invention has the advantages that: the method can accurately identify various problems affecting the shooting quality in the shooting process, respond to the various problems, start a corresponding processing mechanism, enable the shooting environment and the picture quality to meet the requirements, and smoothly and accurately finish the brightness and chroma correction. The method has the characteristics of high identification accuracy, timeliness, strong environmental interference resistance and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of a method for correcting luminance and chrominance of an LED display screen according to an embodiment of the present invention;
fig. 2 is a block diagram of a luminance and chrominance correction system of an LED display screen according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an LED display screen and a rotating device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an LED display screen and a mobile device according to another embodiment of the invention;
fig. 5 is a schematic structural diagram of a data acquisition module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a light supplement device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the present invention provides the following technical solutions:
a method for detecting and correcting brightness and color difference of an LED display screen and an LED display screen system comprise the following steps:
an LED display screen 1 for displaying color pictures;
a central processor 100 installed inside the LED display screen 1;
install in the LED display screen rotating device 111 in LED display screen 1 rear, LED display screen rotating device 111 comprises a plurality of mobilizable bracing pieces, can rationally rotate when needing to rotate.
And the LED display screen moving device 112 is arranged behind the LED lamp, and the LED display screen moving device 112 consists of a plurality of transverse moving devices and longitudinal moving devices and can perform ordered transverse moving and longitudinal moving when needed.
Install the data acquisition module 140 above the LED display screen 1, wherein the data acquisition module 140 includes: a robot arm 10; an environment sensor 141 mounted at one end of the robot arm for detecting a surrounding photographing environment; a camera 142 mounted at the lower left of the environmental sensor for taking a photograph for detection; and a light supplement device 120 installed above the camera for supplementing light during shooting when the shooting light cannot meet the shooting requirement.
Wherein, arm 10 includes:
a first movable arm 11 located to the left of the second movable arm 12;
a second movable arm 12 located to the right of the first movable arm 11;
a third movable arm 13 positioned above and connected to the second movable arm;
a fourth movable arm 14 located above the first movable arm 11;
a fifth movable arm 15 positioned above and connected to the fourth movable arm 14;
a sixth movable arm 16 located to the left of and connected to the fifth movable arm 15;
a seventh movable arm 17 located at the lower left of the sixth movable arm 16 and connected thereto;
an eighth movable arm 18 located at the lower left of the seventh movable arm 17 and connected thereto;
and the brightness and chrominance correction software, the LED display screen position adjustment module, the light supplementing device and the data acquisition module are connected with the central processing unit.
Referring to fig. 1, a method for correcting a bright color difference of an LED display screen and an LED display screen system include:
s1: detecting correction time according to preset brightness and color difference of the LED display screen, wherein five minutes before the correction time, the central processing unit sends instructions to each device module, and each device module receives the instructions, is started in advance and is in a standby state;
s2: the LED display screen responds and commands the appointed area of the LED display screen to display the appointed color used for correction;
s3: the mechanical arm is opened, the movable arm is changed from a contraction state to an extension state, and the movable arm moves to the LED display screen area to be detected;
s4: a camera and an environment detector which are positioned at one end of the mechanical arm are started, and the environment detector detects a shooting environment;
s5: the camera shoots a specified area of the LED display screen to obtain a color picture for detection of the specified area, and sends the picture to the central processing unit;
s6: the central processing unit receives the picture, carries out imaging quality inspection on the picture, and then sends the picture to the brightness and chrominance correction system;
s7: the brightness and chroma correction system detects and analyzes the received image to obtain original brightness and chroma values of all LED lamp points of the LED display screen to be detected, and performs difference calculation on the obtained result and a preset standard brightness and chroma value to obtain a brightness and chroma correction coefficient of all the LED lamp points;
s8: the central processing unit receives the brightness and chrominance correction coefficient of each LED lamp obtained by the brightness and chrominance correction system and commands the LED display screen system to carry out brightness and chrominance correction based on the correction coefficient;
s9: after the correction is finished, each detection and correction part is closed and returns to the initial state.
Example 2
On the basis of embodiment 1, referring to fig. 1, fig. 2, fig. 3, fig. 5 and fig. 6, a method for detecting and correcting brightness and color differences of an LED display screen and an LED display screen system:
when encountering rain and snow weather:
s21: detecting correction time according to preset brightness and color difference of the LED display screen, wherein five minutes before the correction time, the central processing unit sends instructions to each device module, and each device module receives the instructions, is started in advance and is in a standby state;
s22: the LED display screen responds and commands the appointed area of the LED display screen to display the appointed color used for correction;
s23: the mechanical arm is opened, the movable arm is changed from a contraction state to an extension state, and the movable arm moves to the LED display screen area to be detected;
s24: the camera and the environment detector which are positioned at one end of the mechanical arm are started, the environment detector detects the shooting environment and feeds back the detected weather condition information to the central processing unit;
s25: when the central processing unit judges that the weather is rainy or snowy, the central processing unit sends an instruction to the LED display screen rotating device to command the screen to rotate;
s26: the LED display screen rotating device responds, and rotates the screen to a reasonable position to enable the photographing environment to reach the standard;
s27: the camera shoots a specified area of the LED display screen to obtain a color picture for detection of the specified area, and sends the picture to the central processing unit;
s28: the central processing unit receives the picture, carries out imaging quality inspection on the picture, and then sends the picture to the brightness and chrominance correction system;
s29: the brightness and chroma correction system detects and analyzes the received image to obtain original brightness and chroma values of all LED lamp points of the LED display screen to be detected, and performs difference calculation on the obtained result and a preset standard brightness and chroma value to obtain a brightness and chroma correction coefficient of all the LED lamp points;
s30: the central processing unit receives the brightness and chrominance correction coefficient of each LED lamp obtained by the brightness and chrominance correction system and commands the LED display screen system to carry out brightness and chrominance correction based on the correction coefficient;
s31: after the correction is finished, each detection and correction part is closed and returns to the initial state.
This example passes through the installation of LED display screen rotating device, makes the LED display screen can overcome the adverse effect of sleet weather to shooing when carrying out bright colour difference detection correction.
Example 3
On the basis of embodiment 1, referring to fig. 1, fig. 2, fig. 4, fig. 5 and fig. 6, a method for detecting and correcting brightness and color differences of an LED display screen and an LED display screen system:
when part of the screen is shielded or scratched:
s331: detecting correction time according to preset brightness and color difference of the LED display screen, wherein five minutes before the correction time, the central processing unit sends instructions to each device module, and each device module receives the instructions, is started in advance and is in a standby state;
s332: the LED display screen responds and commands the appointed area of the LED display screen to display the appointed color used for correction;
s333: the mechanical arm is opened, the movable arm is changed from a contraction state to an extension state, and the movable arm moves to the LED display screen area to be detected;
s334: the camera and the environment detector which are positioned at one end of the mechanical arm are started, the environment detector detects the shooting environment and feeds back the detected LED display screen state information to the central processing unit;
s335: when the central processing unit judges that the area of the LED display screen to be detected is in a shielded or scratched state, sending an instruction to the LED display screen moving device to command screen movement;
s336: the LED display screen moving device responds, sequentially moves the LED lamp points to the LED display screen area meeting the shooting condition in a regional and orderly manner, and simultaneously moves the mechanical arm to the specified area meeting the shooting condition;
s337: the camera shoots a specified area of the LED display screen to obtain a color picture for detection of the specified area, and sends the picture to the central processing unit;
s338: the central processing unit receives the picture, carries out imaging quality inspection on the picture, and then sends the picture to the brightness and chrominance correction system;
s339: the brightness and chroma correction system detects and analyzes the received image to obtain original brightness and chroma values of all LED lamp points of the LED display screen to be detected, and performs difference calculation on the obtained result and a preset standard brightness and chroma value to obtain a brightness and chroma correction coefficient of all the LED lamp points;
s340: the central processing unit receives the brightness and chrominance correction coefficient of each LED lamp obtained by the brightness and chrominance correction system and commands the LED display screen system to carry out brightness and chrominance correction based on the correction coefficient;
s341: and after the correction is finished, each LED lamp point orderly moves to the initial position, and each detection correction part is closed and returns to the initial state.
In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (4)
1. The utility model provides a LED display screen bright colour difference detection correction system which characterized in that includes:
the LED display screen comprises an LED display screen, an LED display screen position adjusting module, a data acquisition module, a central processing unit and a light supplementing device, wherein the LED display screen position adjusting module comprises an LED display screen moving device and an LED display screen rotating device, and the data acquisition module comprises an environment sensor, a mechanical arm and a camera;
the LED display screen is connected with the LED display screen rotating device, is positioned behind the LED display screen and is used for driving the LED display screen to rotate;
the LED display screen moving device is arranged in the LED display screen and is positioned behind the LED display screen, and when the LED display screen is polluted or scratched or is influenced by obstacles to shoot, the LED display screen moving device is started to work, so that an area to be detected is moved to an unaffected area to shoot;
the central processing unit is arranged in the LED display screen, is connected with the LED display screen position adjusting module, the brightness and chrominance correcting module, the light supplementing device and the data processing module, and is used for receiving the instructions sent by each device and module, analyzing and processing the instructions and sending operation instructions to each device module;
the mechanical arm is arranged above the LED display screen, the camera is connected with the mechanical arm, and the mechanical arm is used for moving and shooting according to an operation instruction;
the light supplementing device is arranged above the camera and is started for supplementing light when the environment is dark;
the environment sensor is arranged on the mechanical arm and below the camera, senses the external environment condition before pictures are taken and transmits the environment condition to the central processing unit;
and the brightness and chrominance correction module is used for comparing and analyzing the pictures sent by the processor to generate an LED display screen correction coefficient so as to correct the LED display screen.
2. The system for detecting and correcting the brightness and color difference of the LED display screen according to claim 1, wherein the mechanical arm in the data acquisition module is of a telescopic structure, can be retracted above the LED display screen in a non-working state, and can be extended and moved in a working process.
3. The system for detecting and correcting the brightness and the color difference of the LED display screen according to claim 1, wherein the light supplementing device is an LED luminous body, and the lamp post is annular; the light supplementing device is located inside the mechanical arm in the non-light supplementing mode, and stretches out to supplement light in the light supplementing mode.
4. The method for detecting and correcting the bright color difference of the LED display screen is characterized by comprising the following steps of:
s1: the central processing unit sends an instruction to control the LED display screen to display the image to be corrected;
s2: the central processing unit sends an instruction to wake up the data acquisition module, the data acquisition module detects the shooting environment and sends a detection result to the central processing unit;
s3: the central processing unit analyzes and processes the information sent by the data acquisition module and sends the detection result to each part and module;
s4: each part and each module receive signals and respond to the signals, and the operation required by each device and each module is carried out;
s5: the central processing unit sends out an instruction to control the camera to shoot a color picture for correction after the parameter is adjusted to the target parameter value so as to obtain a color image for correction and transmit the color image for correction to the central processing unit;
s6: the central processing unit sends the image to a brightness and chrominance correction module to carry out brightness and chrominance correction;
s7: the brightness and chrominance correction module analyzes the image to be corrected sent by the central processing unit, calculates the brightness and chrominance correction coefficients of the LED lamp points and sends the brightness and chrominance correction coefficients to the central processing unit;
s8: and the central processing unit corrects the brightness and the chroma of the LED display screen according to the received brightness and chroma correction coefficient.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2021105539757 | 2021-05-20 | ||
| CN202110553975 | 2021-05-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116628743A (en) * | 2023-05-22 | 2023-08-22 | 深圳市视景达科技有限公司 | Privacy protection control method and related device thereof |
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Application publication date: 20210910 |