CN116248815A - Screen image acquisition method and device of spliced screen and analysis data acquisition method - Google Patents

Screen image acquisition method and device of spliced screen and analysis data acquisition method Download PDF

Info

Publication number
CN116248815A
CN116248815A CN202310245248.3A CN202310245248A CN116248815A CN 116248815 A CN116248815 A CN 116248815A CN 202310245248 A CN202310245248 A CN 202310245248A CN 116248815 A CN116248815 A CN 116248815A
Authority
CN
China
Prior art keywords
image
screen
images
area
spliced
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.)
Pending
Application number
CN202310245248.3A
Other languages
Chinese (zh)
Inventor
张意
李刚
牟峥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huaxingyuanchuang Chengdu Technology Co ltd
Original Assignee
Huaxingyuanchuang Chengdu Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huaxingyuanchuang Chengdu Technology Co ltd filed Critical Huaxingyuanchuang Chengdu Technology Co ltd
Priority to CN202310245248.3A priority Critical patent/CN116248815A/en
Publication of CN116248815A publication Critical patent/CN116248815A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/4104—Peripherals receiving signals from specially adapted client devices
    • H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/268—Signal distribution or switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Image Processing (AREA)

Abstract

The application relates to a screen image acquisition method and device of a spliced screen and an analysis data acquisition method. The method comprises the following steps: collecting first images when each screen of the spliced screen displays a solid-color image, and dividing the first images into a plurality of first area images according to the number of the screens; acquiring correction coefficients corresponding to the first area images; correcting the first area image according to the correction coefficient to obtain a corrected image; and splicing the corrected images to obtain a screen image. The method comprises the steps of displaying gray-scale images on each screen of a spliced screen, taking images to obtain a first image, and correcting and splicing the first image to obtain a screen image; the screen images are integrally consistent, the joint information of the spliced screen is eliminated, smooth transition of the images among the screens is realized, and the display effect of the spliced screen is improved.

Description

Screen image acquisition method and device of spliced screen and analysis data acquisition method
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a method and an apparatus for acquiring a screen image of a spliced screen, and an analytical data acquisition method.
Background
With the high-speed development of display technology, the spliced screen has a large scene display effect, so that the spliced screen can bring an immersive visual experience for a user, and is more and more widely applied.
The spliced screen is formed by splicing a plurality of screens, a certain physical frame width is reserved between two adjacent screens to form a splice in order to prevent the screen from being damaged due to hard contact between the screens during splicing, the size of each splice is not fixed, interference exists in screen pixel analysis, and the spliced screen images cannot be integrally consistent, so that the display effect of the spliced screen is affected.
Therefore, those skilled in the art are devoted to developing a technical scheme to eliminate the influence of the seam on the display of the spliced screen, so that the spliced screen images are integrally consistent, and the display effect of the spliced screen is improved.
Disclosure of Invention
Based on the above, it is necessary to provide a method and a device for acquiring a screen image of a spliced screen and a method for acquiring analysis data, so as to solve the problem that the spliced whole image cannot be consistent as a whole and the display effect of the spliced screen is affected due to the existence of a splice in the prior art.
In a first aspect, the present application provides a method for acquiring a screen image of a tiled screen. The method comprises the following steps:
collecting first images when each screen of the spliced screen displays a solid-color image, and dividing the first images into a plurality of first area images according to the number of the screens;
acquiring correction coefficients corresponding to the first area images;
correcting the first area image according to the correction coefficient to obtain a corrected image;
and splicing the corrected images to obtain a screen image.
In one embodiment, before the obtaining the correction coefficient corresponding to each of the first area images, the method further includes:
collecting a second image when each screen displays a positioning image, wherein the positioning image comprises at least four positioning points;
dividing the second image into a plurality of second area images according to the number of the screens;
and projecting each second area image onto a preset new plane by adopting perspective transformation, and obtaining the correction coefficient according to the position corresponding relation between the homogeneous coordinates of each positioning point in the second area image and the homogeneous coordinates of each positioning point after projection.
In one embodiment, the correcting the first area image according to the correction coefficient to obtain a corrected image includes:
and traversing each pixel in the first area image, and calculating the corresponding position coordinate of each pixel after projection by adopting the correction coefficient corresponding to the first area image to obtain the correction image.
In one embodiment, the stitching each corrected image to obtain a screen image includes:
and splicing the corrected images according to the position relation of the screens to obtain screen images.
In one embodiment, the first image and the second image are acquired by using a color camera to acquire the stitched screen.
In one embodiment, the method further comprises:
preprocessing the first image;
the pretreatment comprises the following steps: at least one of an image noise removing operation, a moire removing operation, and a particulate dust filtering operation.
In a second aspect, the application further provides a screen image acquisition device of the spliced screen. The device comprises:
the information acquisition module is used for acquiring a first image and dividing the first image into a plurality of first area images according to the number of the screens; the first images are acquired when the screens display pure-color images;
the information acquisition module is further used for acquiring correction coefficients corresponding to the first area images;
and the processing module is used for correcting the first area image according to the correction coefficient to obtain corrected images, and splicing the corrected images to obtain a screen image.
In a third aspect, the present application also provides an analytical data acquisition method. The method comprises the following steps:
obtaining a screen image of the spliced screen by adopting the screen image extraction method of the spliced screen in the first aspect;
analyzing the screen image to obtain relative brightness data of the spliced screen;
according to the resolution ratio of the spliced screen, converting the relative brightness data into real brightness data;
and taking the real brightness data as analysis data of the brightness compensation of the spliced screen.
In a fourth aspect, the present application also provides a computer device. The computer device comprises a memory storing a computer program and a processor implementing the steps of the method for acquiring a screen image of a tiled screen disclosed in the first aspect and the steps of the method for acquiring analysis data disclosed in the third aspect when the processor executes the computer program.
In a fifth aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the screen image acquisition method of the stitched screen disclosed in the first aspect described above, and the steps of the analysis data acquisition method disclosed in the third aspect described above.
The screen image acquisition method, the device and the analysis data acquisition method of the spliced screen have at least the following advantages:
the method comprises the steps of displaying solid-color images on each screen of a spliced screen, taking images to obtain a first image, and correcting and splicing the first image to obtain a screen image; the screen images are integrally consistent, the joint information of the spliced screen is eliminated, smooth transition of the images among the screens is realized, and the display effect of the spliced screen is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for acquiring a screen image of a tiled screen in one embodiment;
FIG. 2 is a flow chart of obtaining correction coefficients according to one embodiment;
FIG. 3 is a schematic diagram of perspective transformation in one embodiment;
FIG. 4 is a schematic diagram of perspective transformation of a second region image in one embodiment;
FIG. 5 is a block diagram of a screen image acquisition device of a tiled screen in one embodiment;
fig. 6 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
Some exemplary embodiments of the invention have been described for illustrative purposes, it being understood that the invention may be practiced otherwise than as specifically shown in the accompanying drawings.
In a possible embodiment, the embodiment of the present application provides a method for extracting a screen image of a tiled screen, which specifically includes:
step S102, collecting first images when the screens of the spliced screen display solid-color images, and dividing the first images into a plurality of first area images according to the number of the screens.
Step S104, obtaining correction coefficients corresponding to the first area images.
And step S106, correcting each first area image according to the correction coefficient to obtain a corrected image.
And S108, splicing the correction images to obtain a screen image.
In particular, in order to solve the problem of uneven brightness (mura) caused by defects in LCD processes/devices, compensation is generally required for display data of a display screen to change brightness of pixels to achieve an uneven brightness repairing effect. Therefore, in the present embodiment, a gray-scale image or a color image is used to extract a screen image for subsequent brightness compensation processing. The gray-scale image or the color image is a preset solid-color image, and generally, the gray-scale includes 16, 32, 64, 96, 128, 160, 192 and 224, and the specific gray-scale is determined by each panel manufacturer according to the situation. When the gray level image is set, a plurality of gray levels can be selected from the high, medium and low gray levels to display according to the requirement. And displaying the selected gray-scale image or color image on each screen of the spliced screen, and taking the image of the whole spliced screen to acquire a first image.
In general, a tiled screen includes a plurality of screens, where n is the number of rows of each screen, m is the number of columns of each screen, and n and m are natural numbers, which may be the same or different. For example, for one 4*5 stitched screen, the first image corresponding to the stitched screen is divided into 4*5 first area images according to the number of screens. It should be understood that each first area image is correspondingly divided according to the row-column distribution position of the screen, and the size of each first area image is adapted to the size of the corresponding screen.
And correcting each first area image according to the acquired correction coefficient and a preset sequence, for example, according to a screen arrangement mode, so as to obtain corrected images. Wherein each first region image has a one-to-one correction coefficient.
And splicing the correction images according to the position relation of the screens, namely the original positions of the screens of the spliced screens, and eliminating the splice between the screens to obtain the screen images.
According to the screen image extraction method of the spliced screen, the solid-color images are displayed on each screen of the spliced screen, the images are taken, a first image is obtained, and then the first image is corrected and spliced, so that a screen image is obtained; the screen images are integrally consistent, the joint information of the spliced screen is eliminated, smooth transition of the images among the screens is realized, and the display effect of the spliced screen is improved.
In a possible embodiment, the method for extracting a screen image of a spliced screen in the embodiment of the application further includes:
step S202, before the correction coefficient corresponding to each first area image is acquired, acquiring a second image when each screen displays the positioning image, and dividing the second image into a plurality of second area images according to the number of the screens.
Step S204, according to the second image, the correction coefficient is obtained.
Specifically, the positioning image is a preset BMP (Bitmap-File) format image, and for each screen, a positioning image including at least four positioning points is prefabricated, where the positioning image has the original resolution of the screen. And displaying the positioning image on each screen of the spliced screen, and taking an image of the whole spliced screen, and acquiring a second image. For example, for the stitched screen of one 4*5 of the above embodiments, the second image corresponding to the stitched screen is divided into 4*5 second area images by the number of screens. It should be understood that each second area image is correspondingly divided according to the row-column distribution position of the screen, and the size of each second area image is adapted to the size of the corresponding screen.
Further, perspective transformation is adopted, the segmented second area image is projected onto a preset new plane, and correction coefficients are obtained according to the position corresponding relation between the homogeneous coordinates of all positioning points in the second area image and the homogeneous coordinates of all positioning points after projection.
In this embodiment, a high-precision color camera is used to capture images displayed on each screen of the spliced screen to obtain a first image; and taking images of the display positioning images of the screens of the spliced screen to obtain a second image. It will be appreciated that with this approach, three-dimensional coordinates of the first and second images in the spatial coordinate system can be acquired at one time, reducing the processing time.
Referring to fig. 3, the essence of perspective transformation is: a three-dimensional image is projected onto a new viewing plane, thereby converting the three-dimensional image into a two-dimensional image. In this embodiment, the new view plane is the display plane of the spliced screen. And adopting perspective transformation to project the three-dimensional coordinates of the second region image to a display plane of the spliced screen, so as to convert the three-dimensional coordinates into two-dimensional plane coordinates for subsequent processing.
Referring to fig. 4, a perspective transformation process of the second region image is described below with reference to fig. 4.
The second region image includes four anchor points: a first positioning point 1, a second positioning point 2, a third positioning point 3 and a fourth positioning point 4. It should be understood that each anchor point corresponds to one pixel point.
Assuming that (x, y, z) is the homogeneous coordinates of the pixel points corresponding to the first positioning point 1 in the original image of the second area image; in the image after the second image transformation, (X, Y, Z) is the homogeneous coordinates of the pixel point corresponding to the first positioning point 1, and the transformation formula adopted by the method is as follows:
Figure BDA0004125830490000061
after obtaining the homogeneous coordinates (X, Y, Z) transformed by the first positioning point 1, normalizing Z to obtain the two-dimensional plane coordinates (X) corresponding to the first positioning point 1 ′ ，Y ′ 1), wherein Z ′ =1, then point (X ′ ，Y ′ ) Is the two-dimensional plane coordinate of the pixel point corresponding to the original image after transformation, and (X) ′ ，Y ′ ，Z ′ ) The correspondence with (x, y, z) is:
Figure BDA0004125830490000062
/>
Figure BDA0004125830490000063
Figure BDA0004125830490000064
in the above formula, let a 33 =1, substituting homogeneous coordinates of the four anchor points in the original image of the second area image respectively: (x) 0 ,y 0 )、(x 1 ,y 1 )、(x 2 ,y 2 )、(x 3 ,y 3 ) And homogeneous coordinates (X 'of four anchor points in the second region image-converted image' 0 ，Y′ 0 )、(X′ 1 ，Y′ 1 )、(X′ 2 ，Y′ 2 )、(X′ 3 ，Y′ 3 ) Values of parameters a11, a12, a13, a21, a22, a23, a31, a32, which are the obtained correction coefficients, are solved.
And repeating the operation, performing perspective transformation operation on each second area image, and obtaining the correction coefficient corresponding to each first area image. It should be understood that the first area image and the second area image are in one-to-one correspondence according to the arrangement of the screens.
According to the screen image extraction method of the spliced screen, the second image is obtained through displaying the positioning map with the position information on the screen of the spliced screen; and performing perspective transformation operation on the second image according to the position information to obtain a more accurate correction coefficient, so that the first image is corrected according to a unified standard, and the whole consistency of the screen image is realized.
In a possible embodiment, the method for extracting a screen image of a spliced screen in the embodiment of the application further includes: and preprocessing the obtained first image. Specifically, the pretreatment includes: at least one of an image noise removing operation, a moire removing operation, and a particulate dust filtering operation.
It should be understood that in the imaging process, due to the sensitivity and dynamic range of each photosensitive device in the imaging system, and the influence of illumination variation in the actual environment, noise with different types and different intensities always exists in the imaged image. These noises not only annihilate the information of the image, but also generate false information, resulting in degradation of sharpness and poor quality of the image. In the prior art, there is a mature method for eliminating image noise, for example, smoothing filtering can be performed on the first image to remove noise.
Moire is a high-frequency irregular fringe of the picture, which affects the display effect of the screen, due to the high-frequency interference of the photosensitive element of the digital camera. In the prior art, there is a mature method for eliminating mole marks, for example, when a shot finished product is processed, a model for eliminating the mole marks is constructed by adopting a software algorithm, and the mole mark elimination operation is carried out on a shot picture by adopting the model; in addition, the mole marks can be eliminated by changing the angle, the position or the focus of the shooting camera before shooting.
Particulate dust floating in the air may enter into the optical element of the camera, resulting in an image containing the foreign matter in the image captured by the camera, thereby causing degradation in image quality. In the prior art, there is a sophisticated particle dust filtering method, for example, to perform appropriate gain correction on a captured image to correct a change in transmittance caused by a foreign substance, thereby obtaining a high-quality image.
It should be understood that the above pretreatment methods are examples, and in practical application, a suitable treatment method may be selected according to needs, and the application is not limited to the pretreatment method.
According to the screen image extraction method of the spliced screen, the first image is preprocessed, so that noise and interference in the first image are removed, the quality of the image is improved, and the accuracy of subsequent processing is further improved.
The method for extracting the screen image of the spliced screen provided by the embodiment of the application is described in detail below.
In a possible embodiment, for step S106, correcting the first area image according to the correction coefficient, to obtain a corrected image includes:
and traversing each pixel in the first area image aiming at each first area image, calculating the corresponding position coordinates of each pixel after projection by adopting the correction coefficient corresponding to the first area image, thereby completing perspective transformation operation of the first area image and obtaining a corrected image.
In a possible embodiment, for step S108, stitching the correction images to obtain a screen image includes:
and splicing the correction images according to the position relation of the screens to obtain screen images. It should be understood that the above processing for the first image and the second image is performed based on the arrangement of the screens, and thus, the acquired corrected images are in one-to-one correspondence with the screens. And splicing the correction images according to the original positions of the screens in a one-to-one correspondence manner to form an integral screen image, so that the joint effect among the screens can be eliminated, and the display effect of the spliced screen is improved.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a screen image acquisition device of the spliced screen for realizing the screen image acquisition method of the spliced screen. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the screen image capturing device for one or more spliced screens provided below may be referred to the limitation of the screen image capturing method for a spliced screen hereinabove, and will not be described herein.
Referring to fig. 5, in a possible embodiment, an apparatus for acquiring a screen image of a tiled screen is provided in an embodiment of the present application, including: the system comprises an information acquisition module and a processing module, wherein:
the information acquisition module is used for acquiring a first image and dividing the first image into a plurality of first area images according to the number of screens; the first image is acquired when each screen displays a solid-color image.
Specifically, the solid-color image includes a grayscale image and a color image. And displaying the selected solid-color images on each screen of the spliced screen, and taking the whole spliced screen to acquire a first image.
In general, a tiled screen includes a plurality of screens, where n is the number of rows of each screen, m is the number of columns of each screen, and n and m are natural numbers, which may be the same or different.
After the information acquisition module acquires the first image, the first image is divided into a plurality of first area images according to the number of screens, for example, for a spliced screen of 4*5, the first image corresponding to the spliced screen is divided into 4*5 first area images according to the number of screens. It should be understood that each first area image is correspondingly divided according to the row-column distribution position of the screen, and the size of each first area image is adapted to the size of the corresponding screen.
The information acquisition module is also used for acquiring correction coefficients corresponding to the first area images. The correction coefficient is obtained according to a second image when each screen is used for displaying the positioning image, and the correction coefficient is obtained according to the second image, and comprises the following steps:
step one, before the correction coefficient corresponding to each first area image is obtained, second images of each screen when the positioning images are displayed are collected, and the second images are divided into a plurality of second area images according to the number of the screens.
And step two, obtaining correction coefficients according to the second image.
Specifically, the positioning image is a preset BMP (Bitmap-File) format image, and for each screen, a positioning image including at least four positioning points is prefabricated, where the positioning image has the original resolution of the screen. And displaying the positioning image on each screen of the spliced screen, and taking an image of the whole spliced screen, and acquiring a second image. For example, for the stitched screen of one 4*5 of the above embodiments, the second image corresponding to the stitched screen is divided into 4*5 second area images by the number of screens. It should be understood that each second area image is correspondingly divided according to the row-column distribution position of the screen, and the size of each second area image is adapted to the size of the corresponding screen.
Further, perspective transformation is adopted, the segmented second area image is projected onto a preset new plane, and correction coefficients are obtained according to the position corresponding relation between the homogeneous coordinates of all positioning points in the second area image and the homogeneous coordinates of all positioning points after projection.
In this embodiment, a high-precision color camera is used to capture a solid-color image displayed on each screen of the spliced screen, so as to obtain a first image; and taking images of the display positioning images of the screens of the spliced screen to obtain a second image. It will be appreciated that with this approach, three-dimensional coordinates of the first and second images in the spatial coordinate system can be acquired at one time, reducing the processing time.
And the processing module is used for correcting the first area image according to the correction coefficient to obtain a corrected image, and splicing the corrected images to obtain a screen image.
Specifically, the processing module corrects the first area image according to the correction coefficient to obtain a corrected image, including:
and traversing each pixel in the first area image aiming at each first area image, calculating the corresponding position coordinates of each pixel after projection by adopting the correction coefficient corresponding to the first area image, thereby completing perspective transformation operation of the first area image and obtaining a corrected image.
The processing module splices each correction image to obtain a screen image, and the processing module comprises:
and splicing the correction images according to the position relation of the screens to obtain screen images. It should be understood that the above processing for the first image and the second image is performed based on the arrangement of the screens, and thus, the acquired corrected images are in one-to-one correspondence with the screens. And splicing the correction images according to the original positions of the screens in a one-to-one correspondence manner to form an integral screen image, so that the joint effect among the screens can be eliminated, and the display effect of the spliced screen is improved.
In a possible embodiment, the processing module is further configured to pre-process the obtained first image. Specifically, the pretreatment includes: at least one of an image noise removing operation, a moire removing operation, and a particulate dust filtering operation.
The above-mentioned respective modules in the screen image extraction apparatus of the tiled screen may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
The screen image extraction device of the spliced screen displays the solid-color images on each screen of the spliced screen and takes the images to obtain a first image; displaying a positioning map with position information on each screen of the spliced screen to obtain a second image; obtaining correction coefficients according to the second image, and correcting and splicing the first image according to the correction coefficients to obtain a screen image; the screen images are integrally consistent, the joint information of the spliced screen is eliminated, smooth transition of the images among the screens is realized, and the display effect of the spliced screen is improved.
In a possible embodiment, the embodiment of the present application further provides an analysis data acquisition method, where the analysis data is used for brightness compensation of a spliced screen, and specifically includes:
step one, obtaining a screen image of the spliced screen by adopting the screen image extraction method of the spliced screen disclosed in the embodiment.
And secondly, analyzing the screen image to obtain the relative brightness data of the spliced screen.
And thirdly, converting the relative brightness data into real brightness data according to the resolution ratio of the spliced screen.
And step four, taking the real brightness data as analysis data of brightness compensation of the spliced screen.
Further, the screen image is analyzed to obtain R, G, B values of a plurality of pixel points. For each pixel point, brightness=0.229×r+0.587g+0.114b is used for brightness value calculation, and the maximum value, average value or sum of the obtained brightness values in the area is calculated to obtain relative brightness data, wherein the relative brightness data is a 12-bit numerical value and ranges from 0 to 4096.
Further, since the resolution of the image is different from that of the screen, the actual brightness of the current gray level needs to be calculated through gamma2.2, and then the relative brightness data is normalized to the actual brightness data suitable for the screen, so that the final screen image is obtained.
According to the analysis data acquisition method, the screen image which eliminates the influence of the spliced seam of the spliced screen and can truly restore the brightness compensation information of the spliced screen is adopted, the analysis data used for brightness compensation of the spliced screen is extracted, gray scale compensation data are calculated based on the analysis data, mura compensation is carried out on the spliced screen, and the display effect of the spliced screen is improved.
In one possible embodiment, a computer device is provided, which may be a terminal, and the internal structure thereof may be as shown in fig. 6. The computer device includes a processor, a memory, an input/output interface, a communication interface, a display unit, and an input means. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The computer program, when executed by a processor, implements a method for acquiring a screen image of a tiled screen, and a method for acquiring analysis data. The display unit of the computer device is used for forming a visual picture, and can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In a possible embodiment, a computer device is provided, including a memory and a processor, where the memory stores a computer program, and the processor implements steps in the method for acquiring a screen image of a tiled screen disclosed in the above embodiment and steps in the method for acquiring analysis data disclosed in the above embodiment when the processor executes the computer program.
In one possible embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which when executed by a processor implements the steps in the screen image acquisition method of the stitched screen disclosed in the above embodiment, and the steps in the analysis data acquisition method disclosed in the above embodiment.
In a possible embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method for acquiring a screen image of a tiled screen disclosed in the above embodiment, and the steps of the method for acquiring analysis data disclosed in the above embodiment.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims (10)

1. A method for acquiring a screen image of a spliced screen, the method comprising:
collecting first images when each screen of the spliced screen displays a solid-color image, and dividing the first images into a plurality of first area images according to the number of the screens;
acquiring correction coefficients corresponding to the first area images;
correcting the first area image according to the correction coefficient to obtain a corrected image;
and splicing the corrected images to obtain a screen image.
2. The method according to claim 1, characterized in that: before the correction coefficients corresponding to the first area images are obtained, the method further comprises:
collecting a second image when each screen displays a positioning image, wherein the positioning image comprises at least four positioning points;
dividing the second image into a plurality of second area images according to the number of the screens;
and projecting each second area image onto a preset new plane by adopting perspective transformation, and obtaining the correction coefficient according to the position corresponding relation between the homogeneous coordinates of each positioning point in the second area image and the homogeneous coordinates of each positioning point after projection.
3. The method of claim 2, wherein correcting the first region image based on the correction factor results in a corrected image, comprising:
and traversing each pixel in the first area image, and calculating the corresponding position coordinate of each pixel after projection by adopting the correction coefficient corresponding to the first area image to obtain the correction image.
4. The method of claim 2, wherein the stitching each of the rectified images to obtain a screen image comprises:
and splicing the corrected images according to the position relation of the screens to obtain screen images.
5. A method according to claim 2, characterized in that: the first image and the second image are acquired by adopting a color camera to acquire the spliced screen.
6. The method of any one of claims 1-5, further comprising:
preprocessing the first image;
the pretreatment comprises the following steps: at least one of an image noise removing operation, a moire removing operation, and a particulate dust filtering operation.
7. A screen image acquisition device for a tiled screen, the device comprising:
the information acquisition module is used for acquiring a first image and dividing the first image into a plurality of first area images according to the number of the screens; the first images are acquired when the screens display pure-color images;
the information acquisition module is further used for acquiring correction coefficients corresponding to the first area images;
and the processing module is used for correcting the first area image according to the correction coefficient to obtain corrected images, and splicing the corrected images to obtain a screen image.
8. A method of analytical data acquisition, the method comprising:
obtaining a screen image of the spliced screen by adopting the screen image extraction method of the spliced screen as claimed in any one of claims 1 to 6;
analyzing the screen image to obtain relative brightness data of the spliced screen;
according to the resolution ratio of the spliced screen, converting the relative brightness data into real brightness data;
and taking the real brightness data as analysis data of the brightness compensation of the spliced screen.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any one of claims 1 to 6, and implements the steps of the method of claim 8.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, realizes the steps of the method of any one of claims 1 to 6, and the steps of the method of claim 8.
CN202310245248.3A 2023-03-14 2023-03-14 Screen image acquisition method and device of spliced screen and analysis data acquisition method Pending CN116248815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310245248.3A CN116248815A (en) 2023-03-14 2023-03-14 Screen image acquisition method and device of spliced screen and analysis data acquisition method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310245248.3A CN116248815A (en) 2023-03-14 2023-03-14 Screen image acquisition method and device of spliced screen and analysis data acquisition method

Publications (1)

Publication Number Publication Date
CN116248815A true CN116248815A (en) 2023-06-09

Family

ID=86634972

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310245248.3A Pending CN116248815A (en) 2023-03-14 2023-03-14 Screen image acquisition method and device of spliced screen and analysis data acquisition method

Country Status (1)

Country Link
CN (1) CN116248815A (en)

Similar Documents

Publication Publication Date Title
ES2258795T3 (en) PROCEDURE AND DEVICE FOR THE ALIGNMENT OF IMAGES.
CN107024485B (en) The defect inspection method and device of camber display screen
CN111311523B (en) Image processing method, device and system and electronic equipment
CN104702928B (en) Method of correcting image overlap area, recording medium, and execution apparatus
CN109360203A (en) Method for registering images, image registration device and storage medium
CN113992861A (en) Image processing method and image processing device
CN109636890B (en) Texture fusion method and device, electronic equipment, storage medium and product
CN110782424B (en) Image fusion method and device, electronic equipment and computer readable storage medium
CN111866523B (en) Panoramic video synthesis method and device, electronic equipment and computer storage medium
CN110807731A (en) Method, apparatus, system and storage medium for compensating image dead pixel
CN111179199A (en) Image processing method, device and readable storage medium
US20180033156A1 (en) Method and device for filtering texture, using patch shift
CN111861888A (en) Image processing method, image processing device, electronic equipment and storage medium
CN111311720B (en) Texture image processing method and device
CN114674826A (en) Visual detection method and detection system based on cloth
CN116506732B (en) Image snapshot anti-shake method, device and system and computer equipment
CN106683057A (en) Method for automatically geometrically correcting multi-projection display walls with optional continuous screens with curved surfaces
JPWO2016098323A1 (en) Information processing apparatus, information processing method, and program
CN115546016B (en) Method for acquiring and processing 2D (two-dimensional) and 3D (three-dimensional) images of PCB (printed Circuit Board) and related device
CN116248815A (en) Screen image acquisition method and device of spliced screen and analysis data acquisition method
CN111369513A (en) Abnormity detection method, abnormity detection device, terminal equipment and storage medium
JP2005234698A (en) Distortion parameter generation method, video generation method, distortion parameter generation system and video generation system
CN109360176A (en) Image processing method, device, electronic equipment and computer readable storage medium
KR20130104410A (en) Apparatus and method for super-resolution based on error model of single image
Xia et al. A coarse-to-fine ghost removal scheme for HDR imaging

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