CN113257181B - LED screen correction image acquisition method, correction method, acquisition device and correction system - Google Patents
LED screen correction image acquisition method, correction method, acquisition device and correction system Download PDFInfo
- Publication number
- CN113257181B CN113257181B CN202110724164.9A CN202110724164A CN113257181B CN 113257181 B CN113257181 B CN 113257181B CN 202110724164 A CN202110724164 A CN 202110724164A CN 113257181 B CN113257181 B CN 113257181B
- Authority
- CN
- China
- Prior art keywords
- acquisition
- lamp
- control information
- camera
- calculating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Studio Devices (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention relates to the technical field of LED display, and particularly discloses an LED screen correction image acquisition method, a correction method, an acquisition device and a correction system, wherein the acquisition method comprises the steps of calculating the target acquisition width and height range of a camera; generating a plurality of lamp lighting schemes according to the lamp point spacing of the LED display screen, the target acquisition wide-height range and a preset lamp point spacing strategy; generating corresponding display control information and shooting control information according to each lamp lighting scheme; and acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information. The invention obtains the correction images with the least quantity on the basis of meeting the requirement of data precision, improves the image acquisition efficiency, can fully cover the CMOS pixels, solves the problems of peripheral defocusing, distortion and the like of the correction images in the prior art, and ensures the subsequent correction effect on the LED display screen.
Description
Technical Field
The invention relates to the technical field of LED screen correction, in particular to an LED screen correction image acquisition method, a correction method, an acquisition device and a correction system.
Background
The equipment which must be used in the process of correcting the LED display screen is various cameras and various lens matched with the cameras, and the upper computer acquires a correction picture through the camera with the lens so as to calculate a correction coefficient through the correction picture.
However, since each lens has its own optimal magnification range, if the actual magnification of the lens is not within the optimal magnification range of the lens during actual use, the problem of peripheral defocus and distortion of the corrected picture acquired through the lens occurs, which causes the problem of inaccurate data acquired during the correction process, and further affects the correction effect of the LED display screen. If the optimal magnification range is determined, in order to avoid mutual interference between two adjacent pixels on the acquired LED display screen during display, dot-separation display is required, but the number of the collected photos is doubled every time the number of the dots displayed by the dots is increased by one, so that on the premise of ensuring the accuracy of the acquired data, if the minimum number of the dots cannot be determined, the number of the collected photos is obviously increased, and certain influence is caused on the acquisition efficiency. In addition, the higher the resolution of the CMOS of the camera, the more the occupation ratio requirement of the acquired data is, the finer the acquired image requirement is, and if no strict requirement is made on the acquired image, the correction effect is also affected.
Therefore, there is a need to find a new technical solution to solve the above problems.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an LED screen correction image acquisition method, a correction method, an acquisition device and a correction system.
The invention discloses a method for acquiring an LED screen correction image, which comprises the following steps:
calculating a target acquisition width and height range of the camera according to a preset target acquisition width and height calculation strategy and product parameters of the camera; the target acquisition width and height range comprises a target acquisition width range and a target acquisition height range;
generating a plurality of lamp lighting schemes according to the lamp point spacing of the LED display screen, the target acquisition wide-height range and a preset lamp point spacing strategy; at most one of two adjacent lamp points in each lamp lighting scheme is in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme;
generating corresponding display control information according to each lamp lighting scheme and sending the corresponding display control information to the LED display screen;
generating corresponding shooting control information according to each lamp lighting scheme and sending the corresponding shooting control information to the camera;
and acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
Further, according to the lamp point interval of the LED display screen, the target collection wide-height range and the preset lamp point interval strategy, a plurality of lamp point lighting schemes are generated, and the method comprises the following steps:
calculating the resolution of the LED screen body in one image according to the number of pixels occupied by preset lamp points and the number of pixel points spaced between adjacent lamp points;
calculating the number of the spacing points according to the target acquisition width and height range, the lamp point spacing of the LED display screen and the resolution of the LED screen body;
according to the number of the partitions, a plurality of lamp lighting schemes are generated.
Furthermore, the number of the interval pixels is larger than or equal to the number of the pixels occupied by the lamp points.
Further, according to the number of pixels occupied by the preset lamp points and the number of pixels spaced between adjacent lamp points, the method for calculating the resolution of the LED screen body in one image comprises the following steps:
acquiring the resolution of an image shot by a camera as a × b;
calculating the resolution of the LED screen body to be A × B, wherein A is obtained by rounding down the value of a/(x + t), and B is obtained by rounding down the value of B/(x + t); wherein, x is the number of pixel points occupied by the lamp points, and t is the number of pixel points spaced between adjacent lamp points.
Further, according to the lamp dot interval and the LED screen body resolution ratio of target acquisition wide high range, LED display screen, calculate the number of the isolation points, include:
calculating the ratio of the target collection width range to the lamp point spacing of the LED display screen, and collecting the number of the lamp points in the transverse direction;
and calculating the ratio of the number of the transversely collected lamps to the number A, and rounding the value obtained by downwards to be the number of the spacing points.
Further, according to the lamp dot interval and the LED screen body resolution ratio of target acquisition wide high range, LED display screen, calculate the number of the isolation points, include:
calculating the ratio of the target acquisition height range to the lamp point spacing of the LED display screen, and longitudinally acquiring the number of the lamp points;
and calculating the ratio of the number of longitudinally collected lamps to the number B, and rounding the value obtained by downward calculation to obtain the number of separated points.
Further, calculating a target acquisition width and height range of the camera according to a preset target acquisition width and height calculation strategy and product parameters of the camera, including:
calculating an acquisition width interval and an acquisition height interval of the camera according to a preset acquisition interval calculation strategy, the optimal magnification range, the CMOS width and the CMOS height of the camera;
and calculating a target acquisition width range and a target acquisition height range according to the camera framing width-to-height ratio, the acquisition width interval and the acquisition height interval.
The invention also provides an LED screen correction method, which comprises the following steps:
acquiring all correction images by the acquisition method;
merging and splicing the corrected images to generate a whole-screen corrected image;
calculating a correction coefficient according to the whole screen correction image;
and sending the correction coefficient to the LED display screen.
The invention also provides an LED screen correction image acquisition device, which comprises a target acquisition wide-high range calculation module, a lamp lighting scheme generation module, a control information generation module and a correction image processing module, wherein:
the target acquisition wide-high range calculation module is connected with the lamp lighting scheme generation module and used for calculating the target acquisition wide-high range of the camera according to a preset target acquisition wide-high calculation strategy and the product parameters of the camera; the target acquisition width and height range comprises a target acquisition width range and a target acquisition height range;
the lamp lighting scheme generating module is connected with the target acquisition wide-high range calculating module and the control information generating module and used for generating a plurality of lamp lighting schemes according to the lamp point intervals of the LED display screen, the target acquisition wide-high range and a preset lamp point interval strategy; at most one of two adjacent lamp points in each lamp lighting scheme is in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme;
the control information generation module is connected with the lamp lighting scheme generation module and the correction image processing module and used for generating corresponding display control information according to each lamp lighting scheme and sending the display control information to the LED display screen; generating corresponding shooting control information according to each lamp lighting scheme and sending the shooting control information to the camera;
and the corrected image processing module is connected with the control information generating module and is used for acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
The invention also provides an LED screen correction system, which comprises the acquisition device, an LED display screen and a camera, wherein:
the LED display screen is in communication connection with the acquisition device and is used for receiving and correspondingly displaying the display control information; receiving a correction coefficient to carry out screen correction;
the camera is in communication connection with the acquisition device and is used for receiving shooting control information and shooting the LED display screen to obtain a corrected image;
and the correction image processing module in the acquisition device is used for merging and splicing the correction images, generating a whole-screen correction image, calculating a correction coefficient according to the whole-screen correction image and sending the correction coefficient to the LED display screen.
According to the LED screen corrected image acquisition method, the correction method, the acquisition device and the correction system, the target acquisition wide-height range of the camera is calculated according to the product parameters of the camera, then, a plurality of lamp lighting schemes are generated according to the lamp point spacing of the LED display screen and the preset lamp point spacing strategy, display control information and shooting control information are generated under the corresponding lamp lighting schemes, and the LED display screen is shot by the camera, so that corrected images with the number as small as possible are obtained on the basis of meeting the data precision requirement, the image acquisition efficiency is improved, the obtained corrected images can be fully paved with CMOS pixels as much as possible, the problems of peripheral defocusing and distortion of the corrected images in the prior art are solved, and the subsequent correction effect on the LED display screen is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart (I) illustrating steps of a method for collecting an image corrected by an LED screen according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second step of a method for collecting a corrected image of an LED screen according to an embodiment of the present invention;
FIG. 3 is a flow chart (III) illustrating steps of a method for collecting an image corrected by an LED screen according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a method for calibrating an LED panel according to an embodiment of the present invention;
FIG. 5 is a structural composition diagram of an LED screen correction image acquisition device according to an embodiment of the present invention;
fig. 6 is a structural composition diagram of an LED screen correction system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an LED screen correction image acquisition method, a correction method, an acquisition device and a correction system.
Firstly, as shown in fig. 1, the method for collecting the corrected image of the LED screen of the present invention includes the following steps:
s10: and calculating the target acquisition width and height range of the camera according to a preset target acquisition width and height calculation strategy and the product parameters of the camera.
In this embodiment, the target collection wide-height range includes two range values, i.e., a target collection width range and a target collection height range. Specifically, as shown in fig. 2, in step S10, the target capture width and height range of the camera is calculated by the following steps.
S101: and calculating the acquisition width interval and the acquisition height interval of the camera according to a preset acquisition interval calculation strategy, the optimal magnification range, the CMOS width and the CMOS height of the camera.
And calculating the values of the acquisition width interval and the acquisition height interval according to the relationship of the acquisition width = CMOS width/optimal magnification and the acquisition height = CMOS height/optimal magnification. The CMOS width and CMOS height are determined by the camera itself and can be considered as known parameters. The optimal magnification of the camera is determined by the camera lens, denoted by n, and can be considered as a known parameter. The optimal magnification ratio is obtained by manually selecting the optimal magnification ratio range, the optimal magnification ratio range can be determined in a mode of selecting the LED display screen in a partition mode, and if the magnification ratio selected by the LED display screen is not in the optimal magnification ratio range, the LED display screen is partitioned, so that the magnification ratio is reduced until the magnification ratio reaches the optimal magnification ratio range.
S102: and calculating a target acquisition width range and a target acquisition height range according to the camera framing width-to-height ratio, the acquisition width interval and the acquisition height interval.
In this embodiment, the target collection width range is located in the collection width interval of step S101, and the target collection height range is located in the collection height interval of step S101, that is, the target collection width range is smaller than or equal to the set width interval, and the target collection height range is smaller than or equal to the collection height interval. The aspect ratio of the camera framing is determined by the camera characteristics and can be considered as a known parameter.
After learning the target acquisition width-height range through the above steps, step S20 is executed to generate a lamp lighting scheme, as follows:
step S20: and generating a plurality of lamp lighting schemes according to the lamp point spacing of the LED display screen, the target acquisition wide-height range and a preset lamp point spacing strategy.
In the plurality of lamp lighting schemes, at most one of two adjacent lamp points in each lamp lighting scheme is in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme.
Specifically, as shown in fig. 3, step S20 includes the following steps:
step S201: and calculating the LED screen resolution of one image according to the preset number of pixel points occupied by the lamp points and the number of pixel points spaced between adjacent lamp points.
In the embodiment of the invention, the number of the pixels occupied by the lamp points refers to the number of the pixels occupied by one lamp point imaging in an image, and the number of the pixels spaced between adjacent lamp points refers to the number of the pixels spaced between two adjacent lamp points imaging in one image. The number of pixels occupied by the lamp points and the number of pixels spaced between adjacent lamp points are respectively represented by x and t, and the resolution of the LED screen body on an image shot by the camera is calculated (or represented by the resolution A and B of the LED screen body). The method specifically comprises the following steps:
step S2011: the resolution of the image captured by the camera is a b.
a × b is an image resolution, that is, an image captured by the camera includes a × b pixels, and the resolution of the image of this embodiment is also the CMOS resolution in combination with the product parameters of the camera provided in the foregoing embodiments.
Step S2012: and calculating the resolution of the LED screen body as A × B, wherein A is obtained by rounding down the value of a/(x + t), and B is obtained by rounding down the value of B/(x + t).
In this step, a suitable value can be selected according to the result of experimental analysis for setting the number of pixels occupied by the lamp points and the number of pixels spaced between adjacent lamp points. For example, in order to ensure that the measurement accuracy is not greater than ± 1%, each LED lamp needs to be imaged by more than 16 pixels, that is, the number of pixel points occupied by the lamp point is x = 16.
The embodiment of the invention simply explains the value-taking principle of the number of pixels occupied by the lamp point and the number of pixels spaced between adjacent lamp points as follows:
assuming that CMOS corresponds to one LED light point, that is, when there are 1 pixel in CMOS (CMOS pixel), it corresponds to one light point; when 2 pixels exist in the COMS, the COMS corresponds to one lamp point; in the same way, until there are 32 pixels in cmos, there is one light point. The brightness value (nit) corresponding to the LED lamp point corresponding to the pixels in different CMOS is obtained, the brightness value reached when different pixels exist in the CMOS is obtained through a fitting relation, the brightness value is found to be the maximum when 16 pixels exist in the CMOS (the obtained brightness data are the most), verification is carried out on various LED display screens, and x =16 is found to be suitable for the various LED display screens. Also, in the above method, the value of the number t of adjacent light point interval pixels can be obtained, and it is preferable that the value of the number t of adjacent light point interval pixels is optimized so that no mutual influence occurs when each light point and the adjacent light point are imaged, and generally, the number t of adjacent light point interval pixels is set to x/3.
Preferably, another way of determining the value of the number x of the pixel points occupied by the lamp point is as follows: the imaging of the light point is always approximate to a square, so that 10 times of images are acquired under the same state by using the same LED display screen, 4 pixels, 9 pixels, 16 pixels, 25 pixels, 36 pixels and 49 pixels (2 squares, 3 squares, 4 squares, 5 squares, 6 squares and 7 squares respectively) of CMOS, the difference between the maximum value and the minimum value is calculated by data acquired each time, the error percentage is calculated by dividing the difference by the maximum value, and the obtained values are shown in the experimental data of the following table 1:
TABLE 1 Experimental data
Therefore, the value of x can be set to 16, 25, 36, etc., and in order to ensure that the error percentage of the measured data is as low as possible and to ensure higher acquisition efficiency, the value of x is preferably set to 16.
After the LED screen resolution is calculated as a × B according to step S2012, step S202 is executed.
Step S202: and calculating the number of the spacing points according to the target acquisition width and height range, the lamp point distance of the LED display screen and the resolution ratio of the LED screen body.
The number of the spacing points calculated in the embodiment of the present invention is a positive integer, which is the number of the lamp points in the unlighted state spaced between two adjacent lamp points in the lit state in one row (or column) under one lamp lighting scheme. The number of the calculated alternate points of the LED display screens of different models is different when the correction images are collected.
The first method for calculating the number of partitions is as follows:
step S2021 a: the ratio of the target collection width range to the lamp point distance of the LED display screen is used for transversely collecting the number of the lamp points.
The distance between the lamp points of the LED display screen can be set as p, which is determined by the characteristics of the LED display screen and belongs to known parameters. And dividing the target acquisition width range by p to calculate the number of transversely acquired lamp points.
Step S2022 a: and calculating the ratio of the number of the transversely collected lamps to the number A, and rounding the value obtained by downwards to be the number of the spacing points.
Another method for calculating the number of partitions is:
step S2021 b: and calculating the ratio of the target acquisition height range to the lamp point distance of the LED display screen to longitudinally acquire the number of the lamp points.
Step S2022 b: and calculating the ratio of the number of longitudinally collected lamps to the number B, and rounding the value obtained by downward calculation to obtain the number of separated points.
After the number of the division points is calculated from the target collection width range or the target collection height range, step S203 is executed.
Step S203: according to the number of the partitions, a plurality of lamp lighting schemes are generated.
Assuming that the number of the transversely collected lamp dots and the number of the longitudinally collected lamp dots are both 3 (i.e. total 3 × 3=9 lamp dots), the value of the alternate point is 1, and the 9 lamp dots are respectively named as A, B, C, D, E, F, G, H, I, and the arrangement is as follows:
ABC
DEF
GHI
then, taking the lateral direction as the acquisition direction, the lamp lighting schemes generated by the 9 lamps are as follows (X denotes that the lamp is not lit at the current position): (I):
AXC
XEX
GXI
and (ii):
XBX
DXF
XHX
in the first step, the lamp point A is taken as the standard, the second transverse lamp point B is taken as the spacing lamp point, the lamp point C is separated from the lamp point A by the lamp point B, and the lamp point G is separated from the lamp point A by one lamp point, so that the lamp points C and G are in the same state as the lamp point A, and the lamp point I is separated from the lamp points C and G by one lamp point, so that the lamp points C and G are in the same state as the lamp points C and G. In the second embodiment, the light point D, F, H is in the same state as the light point B.
And generating two lamp lighting schemes by taking the longitudinal direction as the acquisition direction and taking the lamp point A and the lamp point D as the standard respectively. The ON/OFF states can be referred to in the columns (one) and (two). Therefore, according to the embodiment of the present invention, the calculated number of the alternate points is as follows: lamp lighting scheme = number of corrected images = (number of dots + 1)2The number of correction images in the same partition is calculated, and if the number of alternate points is equal to 1, lamp lighting schemes = the number of correction images =4, and if the number of alternate points is equal to 2, 9 lamp lighting schemes should be generated, corresponding to 9 correction images.
Through the lamp lighting scheme, at most one of two adjacent lamp points in each lamp lighting scheme can be in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme. The above examples are merely illustrative of the schemes and do not limit the scope of protection.
In the present invention, it is preferable that the number of the spaced pixels is equal to or greater than the number of the pixels occupied by the lamp dots.
S30: and generating corresponding display control information according to each lamp lighting scheme and sending the corresponding display control information to the LED display screen.
S40: and generating corresponding shooting control information according to each lamp lighting scheme and sending the corresponding shooting control information to the camera.
In this embodiment, the shooting control information at least includes the shooting time, the number of pictures to be shot, and the number of shots is calculated according to the number of alternate points obtained by the lamp lighting scheme in the previous step.
S50: and acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
And the LED display screen lights the corresponding lamp points according to the received display control information, and meanwhile, the camera correspondingly executes the shooting control information when the LED display screen executes the display control information, so that the corresponding correction image is shot.
According to the method for acquiring the corrected image of the LED screen, the value of the number of the separation points is calculated under the premise that the target acquisition width and height range of the camera and the lamp point distance of the LED display screen are considered, the minimum separation point numerical value under the premise that the data precision requirement is met is obtained by rounding the calculation result downwards, so that the corrected image with the smallest number can be obtained, the CMOS pixels can be fully paved in the corrected image, the image acquisition efficiency is improved, and the subsequent correction effect on the LED display screen is ensured. Secondly, the invention also comprises a method for correcting the LED screen, as shown in fig. 4, comprising the following steps:
step S1: all corrected images are acquired.
By the method for acquiring the corrected image of the LED screen, the corrected image of the LED screen shot by the camera under different shooting control information under different display control information is acquired.
Step S2: and merging and splicing the corrected images to generate a whole screen corrected image.
And combining the shot corrected images in the same area, so that the combined images display all the lamp points in the area, and adopting a subarea shooting mode because the difference between the camera target acquisition width and height range and the size of the LED display screen is large, so that the images in different areas need to be spliced, and finally a whole-screen corrected image is obtained.
Step S3: and calculating a correction coefficient according to the whole screen correction image.
The calculation of the correction coefficient in this step may be performed by taking the existing correction method as a reference, and this embodiment is not specifically limited.
Step S4: and sending the correction coefficient to the LED display screen.
The LED display screen corrects the screen according to the correction coefficient, and the design purpose of the invention is realized.
The present invention further includes an LED screen correction image acquisition apparatus, as shown in fig. 5, the acquisition apparatus 10 includes a target acquisition wide-high range calculation module 101, a lamp lighting scheme generation module 102, a control information generation module 103, and a correction image processing module 104, wherein:
a target acquisition width and height range calculation module 101 connected to the lamp lighting scheme generation module 102, and configured to calculate a target acquisition width and height range of the camera according to a preset target acquisition width and height calculation policy and product parameters of the camera; the target acquisition width and height range comprises a target acquisition width range and a target acquisition height range. Specifically, the target acquisition width and height range calculation module 101 calculates the target acquisition width and height range of the camera according to a preset target acquisition width and height calculation strategy and the product parameters of the camera, and includes: calculating an acquisition width interval and an acquisition height interval of the camera according to a preset acquisition interval calculation strategy, the optimal magnification range, the CMOS width and the CMOS height of the camera; and calculating a target acquisition width range and a target acquisition height range according to the camera framing width-to-height ratio, the acquisition width interval and the acquisition height interval.
The lamp lighting scheme generation module 102 is connected with the target acquisition wide-high range calculation module 101 and the control information generation module 103, and is used for generating a plurality of lamp lighting schemes according to the lamp point intervals of the LED display screen, the target acquisition wide-high range and a preset lamp point interval strategy; at most one of two adjacent lamp points in each lamp lighting scheme is in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme. Specifically, the generating of the plurality of lamp lighting schemes by the lamp lighting scheme generating module 102 includes: calculating the resolution of the LED screen body in one image according to the number of pixels occupied by preset lamp points and the number of pixel points spaced between adjacent lamp points; calculating the number of the spacing points according to the target acquisition width and height range, the lamp point spacing of the LED display screen and the resolution of the LED screen body; according to the number of the partitions, a plurality of lamp lighting schemes are generated.
A control information generation module 103, connected to the lamp lighting scheme generation module 102 and the corrected image processing module 104, for generating corresponding display control information according to each lamp lighting scheme and sending the display control information to the LED display screen; and generating corresponding shooting control information according to each lamp lighting scheme and sending the shooting control information to the camera.
And the corrected image processing module 104 is connected with the control information generating module 103 and is used for acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
The acquisition device of the embodiment of the invention is realized by the following steps:
s10: and calculating the target acquisition width and height range of the camera according to a preset target acquisition width and height calculation strategy and the product parameters of the camera.
The method specifically comprises the following steps:
s101: and calculating the acquisition width interval and the acquisition height interval of the camera according to a preset acquisition interval calculation strategy, the optimal magnification range, the CMOS width and the CMOS height of the camera.
S102: and calculating a target acquisition width range and a target acquisition height range according to the camera framing width-to-height ratio, the acquisition width interval and the acquisition height interval.
Step S20: and generating a plurality of lamp lighting schemes according to the lamp point spacing of the LED display screen, the target acquisition wide-height range and a preset lamp point spacing strategy.
The method specifically comprises the following steps:
step S201: and calculating the LED screen resolution of one image according to the preset number of pixel points occupied by the lamp points and the number of pixel points spaced between adjacent lamp points.
The method specifically comprises the following steps:
step S2011: the resolution of the image captured by the camera is a b.
Step S2012: and calculating the resolution of the LED screen body as A × B, wherein A is obtained by rounding down the value of a/(x + t), and B is obtained by rounding down the value of B/(x + t).
Step S202: and calculating the number of the spacing points according to the target acquisition width and height range, the lamp point distance of the LED display screen and the resolution ratio of the LED screen body.
The method specifically comprises the following steps:
step S2021 a: the ratio of the target collection width range to the lamp point distance of the LED display screen is used for transversely collecting the number of the lamp points.
Step S2022 a: and calculating the ratio of the number of the transversely collected lamps to the number A, and rounding the value obtained by downwards to be the number of the spacing points.
Or:
step S2021 b: and calculating the ratio of the target acquisition height range to the lamp point distance of the LED display screen to longitudinally acquire the number of the lamp points.
Step S2022 b: and calculating the ratio of the number of longitudinally collected lamps to the number B, and rounding the value obtained by downward calculation to obtain the number of separated points.
Step S203: according to the number of the partitions, a plurality of lamp lighting schemes are generated.
S30: and generating corresponding display control information according to each lamp lighting scheme and sending the corresponding display control information to the LED display screen.
S40: and generating corresponding shooting control information according to each lamp lighting scheme and sending the corresponding shooting control information to the camera.
S50: and acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
For the implementation process of the above steps, reference may be made to the embodiment of the method for collecting an image corrected by an LED screen and fig. 1 to 3, which are not described herein again.
The present invention further includes an LED screen calibration system, as shown in fig. 6, the calibration system includes the acquisition device 10 of the above embodiment, and an LED display screen 20 and a camera 30, wherein:
the LED display screen 20 is in communication connection with the acquisition device 10, specifically, the LED display screen 20 is connected with the control information generation module 103 and the corrected image processing module 104, and the LED display screen 20 is used for receiving and correspondingly displaying the display control information; receiving a correction coefficient to carry out screen correction;
the camera 30 is in communication connection with the acquisition device 10, specifically, the camera 30 is connected with the control information generation module 103 and the corrected image processing module 104, and the camera 30 is used for receiving the shooting control information and shooting the LED display screen 20 to obtain a corrected image;
the acquisition device 10 is in communication connection with the LED display screen 20 and the camera 30, and the corrected image processing module 104 in the acquisition device 10 merges and splices the corrected images to generate a full-screen corrected image, and calculates a correction coefficient according to the full-screen corrected image and sends the correction coefficient to the LED display screen 20.
The LED screen correction system provided by the embodiment of the invention can realize the correction of the LED screen in the following ways:
step S1: all corrected images are acquired.
The obtaining mode of the corrected image can be realized by referring to the embodiment of the LED screen corrected image acquisition method of the invention, and details are not repeated here.
Step S2: and merging and splicing the corrected images to generate a whole screen corrected image.
Step S3: and calculating a correction coefficient according to the whole screen correction image.
Step S4: and sending the correction coefficient to the LED display screen.
The implementation process of the above steps can refer to the embodiment of the LED screen correction image acquisition method and the LED screen correction method of the present invention and fig. 1 to 4, and details are not repeated here.
According to the LED screen corrected image acquisition method, the correction method, the acquisition device and the correction system, the target acquisition wide-height range of the camera is calculated according to the product parameters of the camera, then, a plurality of lamp lighting schemes are generated according to the lamp point spacing of the LED display screen and the preset lamp point spacing strategy, display control information and shooting control information are generated under the corresponding lamp lighting schemes, and the LED display screen is shot by the camera, so that corrected images with the number as small as possible are obtained on the basis of meeting the data precision requirement, the image acquisition efficiency is improved, the obtained corrected images can be fully covered with CMOS pixels as much as possible, the problems of peripheral defocusing and distortion of the corrected images in the prior art are solved, and the subsequent correction effect on the LED display screen is ensured.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (8)
1. An LED screen correction image acquisition method is characterized by comprising the following steps:
calculating a target acquisition width and height range of the camera according to a preset target acquisition width and height calculation strategy and product parameters of the camera; the method comprises the following steps: calculating an acquisition width interval and an acquisition height interval of the camera according to a preset acquisition interval calculation strategy, the optimal magnification range, the CMOS width and the CMOS height of the camera; the acquisition interval calculation strategy is as follows: the acquisition width = CMOS width/optimal magnification, and the acquisition height = CMOS height/optimal magnification; calculating the target acquisition width range and the target acquisition height range according to the camera framing width-to-height ratio, the acquisition width interval and the acquisition height interval; the target acquisition wide-height range comprises a target acquisition width range and a target acquisition height range;
generating a plurality of lamp lighting schemes according to the lamp point spacing of the LED display screen, the target acquisition wide-height range and a preset lamp point spacing strategy; the method comprises the following steps: calculating the resolution of the LED screen body in one image according to the number of pixels occupied by preset lamp points and the number of pixel points spaced between adjacent lamp points; calculating the number of the spacing points according to the target acquisition width and height range, the lamp point spacing of the LED display screen and the resolution of the LED screen body; generating a plurality of lamp lighting schemes according to the number of the partitions; at most one of two adjacent lamp points in each lamp lighting scheme is in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme;
generating corresponding display control information according to each lamp lighting scheme and sending the display control information to an LED display screen;
generating corresponding shooting control information according to each lamp lighting scheme and sending the corresponding shooting control information to a camera;
and acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
2. The LED screen correction image acquisition method of claim 1, characterized in that the number of the spaced pixels is greater than or equal to the number of the pixels occupied by the lamp dots.
3. The method for collecting the LED screen correction image according to claim 1, wherein the step of calculating the resolution of the LED screen body in one image according to the number of the pixel points occupied by the preset lamp points and the number of the pixel points at intervals between the adjacent lamp points comprises the following steps:
acquiring the resolution of an image shot by a camera as a × b;
calculating the resolution of the LED screen body to be A × B, wherein A is obtained by rounding down the value of a/(x + t), and B is obtained by rounding down the value of B/(x + t); wherein x is the number of pixels occupied by the lamp points, and t is the number of pixels spaced between the adjacent lamp points.
4. The method for collecting the corrected image of the LED screen as claimed in claim 3, wherein the calculating the number of the spacing points according to the target collection width and height range, the lamp point spacing of the LED display screen and the resolution of the LED screen body comprises:
calculating the ratio of the target collection width range to the lamp point spacing of the LED display screen, and collecting the number of the lamp points in the transverse direction;
and calculating the ratio of the number of the transverse acquisition lamps to the number A, and rounding the ratio downwards to obtain the number of the spacing points.
5. The method for collecting the corrected image of the LED screen as claimed in claim 3, wherein the calculating the number of the spacing points according to the target collection width and height range, the lamp point spacing of the LED display screen and the resolution of the LED screen body comprises:
calculating the ratio of the target collection height range to the lamp point spacing of the LED display screen, and longitudinally collecting the number of the lamp points;
and calculating the ratio of the number of the longitudinally collected lamps to the number B, and rounding the ratio downwards to obtain the number of the spacing points.
6. An LED screen correction method is characterized by comprising the following steps:
acquiring all of said corrected images by the acquisition method of any one of claims 1 to 5;
merging and splicing the corrected images to generate a whole-screen corrected image;
calculating a correction coefficient according to the whole screen correction image;
and sending the correction coefficient to an LED display screen.
7. The utility model provides a LED screen correction image acquisition device, its characterized in that, acquisition device includes target collection wide high range calculation module, lamp point scheme generation module, control information generation module and correction image processing module, wherein:
the target acquisition wide-high range calculation module is connected with the lamp lighting scheme generation module and is used for calculating the target acquisition wide-high range of the camera according to a preset target acquisition wide-high calculation strategy and the product parameters of the camera; the method comprises the following steps: calculating an acquisition width interval and an acquisition height interval of the camera according to a preset acquisition interval calculation strategy, the optimal magnification range, the CMOS width and the CMOS height of the camera; the acquisition interval calculation strategy is as follows: the acquisition width = CMOS width/optimal magnification, and the acquisition height = CMOS height/optimal magnification; calculating the target acquisition width range and the target acquisition height range according to the camera framing width-to-height ratio, the acquisition width interval and the acquisition height interval; the target acquisition wide-height range comprises a target acquisition width range and a target acquisition height range;
the lamp lighting scheme generating module is connected with the target acquisition wide-high range calculating module and the control information generating module and is used for generating a plurality of lamp lighting schemes according to the lamp point distance of the LED display screen, the target acquisition wide-high range and a preset lamp point interval strategy; the method comprises the following steps: calculating the resolution of the LED screen body in one image according to the number of pixels occupied by preset lamp points and the number of pixel points spaced between adjacent lamp points; calculating the number of the spacing points according to the target acquisition width and height range, the lamp point spacing of the LED display screen and the resolution of the LED screen body; generating a plurality of lamp lighting schemes according to the number of the partitions; at most one of two adjacent lamp points in each lamp lighting scheme is in a lighting state, and any lamp point is in a lighting state in at least one lamp lighting scheme;
the control information generation module is connected with the lamp lighting scheme generation module and the correction image processing module and is used for generating corresponding display control information according to each lamp lighting scheme and sending the display control information to the LED display screen; generating corresponding shooting control information according to each lamp lighting scheme and sending the shooting control information to a camera;
and the corrected image processing module is connected with the control information generating module and is used for acquiring corrected images shot by the camera under different shooting control information on the LED display screens under different display control information.
8. An LED screen calibration system, comprising the capture device of claim 7, and an LED display screen and camera, wherein:
the LED display screen is in communication connection with the acquisition device and is used for receiving the display control information and displaying the display control information correspondingly; receiving a correction coefficient to carry out screen correction;
the camera is in communication connection with the acquisition device and is used for receiving the shooting control information and shooting the LED display screen to obtain the corrected image;
the collection device is in communication connection with the LED display screen and the camera, and the corrected image processing module in the collection device is used for merging and splicing the corrected images to generate a whole-screen corrected image, calculating the correction coefficient according to the whole-screen corrected image and sending the correction coefficient to the LED display screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110724164.9A CN113257181B (en) | 2021-06-29 | 2021-06-29 | LED screen correction image acquisition method, correction method, acquisition device and correction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110724164.9A CN113257181B (en) | 2021-06-29 | 2021-06-29 | LED screen correction image acquisition method, correction method, acquisition device and correction system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113257181A CN113257181A (en) | 2021-08-13 |
| CN113257181B true CN113257181B (en) | 2021-10-22 |
Family
ID=77190192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110724164.9A Active CN113257181B (en) | 2021-06-29 | 2021-06-29 | LED screen correction image acquisition method, correction method, acquisition device and correction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113257181B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113593426B (en) * | 2021-09-28 | 2021-12-03 | 卡莱特云科技股份有限公司 | Module division method for LED spliced screen image and LED screen correction method |
| CN115862530B (en) * | 2023-03-02 | 2023-06-16 | 长春希达电子技术有限公司 | Correction method and device for special-shaped LED screen, electronic equipment and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004144968A (en) * | 2002-10-24 | 2004-05-20 | Matsushita Electric Ind Co Ltd | Light emission display device |
| CN105185298A (en) * | 2015-08-05 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Correction method of LED display screen |
| CN105185302A (en) * | 2015-08-28 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Correction method for light point position deviation among monochromatic images and application thereof |
| CN105551428A (en) * | 2016-02-03 | 2016-05-04 | 西安诺瓦电子科技有限公司 | LED display screen alternative point collection correction method |
| CN105654898A (en) * | 2016-02-25 | 2016-06-08 | 西安诺瓦电子科技有限公司 | Image acquisition device imaging moire inhibition method and application thereof |
| CN105788499A (en) * | 2016-04-28 | 2016-07-20 | 深圳市灵星雨科技开发有限公司 | LED display screen point-to-point brightness and chroma correction method based on constant-temperature CCD camera |
-
2021
- 2021-06-29 CN CN202110724164.9A patent/CN113257181B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004144968A (en) * | 2002-10-24 | 2004-05-20 | Matsushita Electric Ind Co Ltd | Light emission display device |
| CN105185298A (en) * | 2015-08-05 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Correction method of LED display screen |
| CN105185302A (en) * | 2015-08-28 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Correction method for light point position deviation among monochromatic images and application thereof |
| CN105551428A (en) * | 2016-02-03 | 2016-05-04 | 西安诺瓦电子科技有限公司 | LED display screen alternative point collection correction method |
| CN105654898A (en) * | 2016-02-25 | 2016-06-08 | 西安诺瓦电子科技有限公司 | Image acquisition device imaging moire inhibition method and application thereof |
| CN105788499A (en) * | 2016-04-28 | 2016-07-20 | 深圳市灵星雨科技开发有限公司 | LED display screen point-to-point brightness and chroma correction method based on constant-temperature CCD camera |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113257181A (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107507558B (en) | Correction method of LED display screen | |
| CN113257181B (en) | LED screen correction image acquisition method, correction method, acquisition device and correction system | |
| CN105185314B (en) | LED display uniformity compensation method | |
| US8760445B2 (en) | Method of correcting brightness of electronic display | |
| CN107024485B (en) | The defect inspection method and device of camber display screen | |
| KR101941801B1 (en) | Image processing method and device for led display screen | |
| CN109495729B (en) | Projection picture correction method and system | |
| CN109040728B (en) | Ultra-short-focus projection equipment with double-camera trapezoidal correction and method thereof | |
| CN103377474A (en) | Camera lens shadow correction coefficient determination method and device, and camera lens shadow correction method and device | |
| CN113593426B (en) | Module division method for LED spliced screen image and LED screen correction method | |
| CN112489593A (en) | Seamless splicing correction method and device for LED display screen | |
| US20230276034A1 (en) | Method and system for adjusting projection dithering | |
| CN114125411B (en) | Projection device correction method, projection device correction device, storage medium and projection device | |
| CN112929623B (en) | Lens shadow repairing method and device applied to whole screen in correction process | |
| JP2008180602A (en) | Inspection apparatus, testing method, inspection program, and computer readable medium | |
| JP5515405B2 (en) | Video processing device, video display device, and video processing method | |
| CN113608709A (en) | Display screen correction method, device, readable storage medium and system | |
| CN114359055B (en) | Image splicing method and related device for multi-camera shooting screen body | |
| US20210368089A1 (en) | Apparatus and method thereof, and storage medium | |
| CN106791736B (en) | Trapezoidal correction method and projector | |
| US20110234860A1 (en) | Solid-state imaging device | |
| CN113747131A (en) | Projection system and adaptive adjustment method thereof | |
| CN112489115A (en) | Light emitting module positioning method, device, electronic equipment, storage medium and system | |
| CN104994309A (en) | Method and system for removing light spot of camera | |
| TWI543584B (en) | Luminance measurement method, luminance measurement apparatus and image quality adjustment technique using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |