CN112185299B - Correction method and device for display screen - Google Patents
Correction method and device for display screen Download PDFInfo
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- CN112185299B CN112185299B CN202011098685.XA CN202011098685A CN112185299B CN 112185299 B CN112185299 B CN 112185299B CN 202011098685 A CN202011098685 A CN 202011098685A CN 112185299 B CN112185299 B CN 112185299B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The invention discloses a method and a device for correcting a display screen. Wherein, the method comprises the following steps: acquiring the brightness and chrominance information of each lamp point through relative movement of the image acquisition equipment and the screen body; calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point; carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain a corrected image; and correcting the display screen according to the corrected image. The invention solves the technical problem that the prior art cannot overcome the defect of poor driving effect of the corrected LED screen in the process of correcting each lamp point in the LED screen.
Description
Technical Field
The invention relates to the technical field of image processing, in particular to a method and a device for correcting a display screen.
Background
With the development of LED display technology, LED display screens are currently used in various fields due to their advantages of low cost, low power consumption, high visibility, freedom in assembly, etc. Meanwhile, with the popularization of the application of the LED display screen, users have higher and higher requirements for the display quality of the LED display screen, and therefore how to improve the display quality of the LED display screen becomes a research hotspot in the field.
However, in the process of improving the uniformity of the LED screen, for the correction process of the camera dark angle and the LED light distribution curve, the real brightness and chroma of the LED display screen are obtained by fitting the collected data of the LED display screen, and then the correction coefficient of the LED display screen is calculated. And the curved surface receives LED screen light dark block etc. to influence greatly, and for example COB screen and glass substrate are mostly all to have light dark block, and current data drive scheme is difficult reaching good correction effect.
Aiming at the problem that the driving effect of the corrected LED screen is poor due to the fact that the prior art cannot overcome the defect that the driving effect of the corrected LED screen is poor in the process of correcting each lamp point in the LED screen, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for correcting a display screen, which at least solve the technical problem that the driving effect of an LED screen after correction cannot be overcome in the process of correcting each lamp point in the LED screen in the prior art.
According to an aspect of an embodiment of the present invention, there is provided a method for correcting a display screen, including: acquiring the brightness and chrominance information of each lamp point through the relative movement of the image acquisition equipment and the screen body; calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point; carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain a corrected image; and correcting the display screen according to the corrected image.
Optionally, before the acquiring the luminance and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body, the method further comprises: and correcting the screen body.
Optionally, the brightness and chrominance information includes multiple groups of brightness and chrominance information, where each group of brightness and chrominance information is obtained by collecting brightness and chrominance of the image collection device and the same lamp point of the screen body at different relative positions.
Further, optionally, acquiring the luminance and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body comprises: at least twice, moving an image acquisition device or a screen body in the horizontal direction, and acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point to obtain first-type brightness and chrominance information, wherein the first-type brightness and chrominance information comprises: at least two groups of brightness and chrominance information of the image acquisition equipment and the same lamp point in different relative positions in the horizontal direction; and/or, at least twice moving the image acquisition equipment or the screen body in the vertical direction, and acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point to obtain second-type brightness and chrominance information, wherein the second-type brightness and chrominance information comprises: and at least two groups of brightness and chrominance information of the image acquisition equipment and the same lamp point in different relative positions in the vertical direction.
Optionally, calculating according to the luminance and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point includes: calculating first-class variation coefficients of different position variations of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first-class brightness information; and determining the first type of change coefficient as the surface coefficient of each lamp point.
Optionally, calculating according to the luminance and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point includes: calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information; and determining the second type of change coefficient as the surface coefficient of each lamp point.
Optionally, calculating according to the luminance and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point includes: calculating first-class variation coefficients of different position variations of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first-class brightness information; calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information; and calculating according to the first type of change coefficient and the second type of change coefficient to obtain the curved surface coefficient of each lamp point.
Optionally, acquiring the brightness and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body includes: and acquiring the brightness and chrominance information of the same lamp point in each lamp point relative to the image acquisition equipment at different distances in the normal direction by moving the image acquisition equipment or the screen body along the normal line at least twice to obtain at least two groups of brightness and chrominance information.
Further, optionally, calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point includes: calculating a variation coefficient of distance variation of the same lamp point relative to the image acquisition equipment in the normal direction according to at least two groups of brightness information; and determining the change coefficient as the surface coefficient of each lamp point.
According to another aspect of the embodiments of the present invention, there is provided a correction device for a display screen, which is applied to the above method, including: the acquisition module is used for acquiring the brightness and chrominance information of each lamp point through the relative movement of the image acquisition equipment and the box body; the calculation module is used for calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point; the first correction module is used for carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain a corrected image; and the second correction module is used for correcting the display screen according to the corrected image.
According to another aspect of the embodiments of the present invention, there is provided a non-volatile storage medium, wherein the non-volatile storage medium includes a stored program, and wherein the apparatus in which the non-volatile storage medium is controlled to execute the above method when the program is executed.
According to another aspect of the embodiments of the present invention, there is provided a processor, wherein the processor is configured to execute a program, and wherein the program executes to perform the above method.
In the embodiment of the invention, the brightness and chrominance information of each lamp point is acquired by the relative movement of the image acquisition equipment and the screen body; calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point; carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain a corrected image; the display screen is corrected according to the corrected image, the effects of the camera vignetting and the LED light distribution curve are calibrated through the translation of the camera and the box body, and the aim of correcting the curved surface of the data collected by the camera by utilizing the calibration result is fulfilled, so that the corrected LED display screen is more uniform, the technical effect that the LED box body can be spliced randomly is achieved, and the technical problem that the poor driving effect of the corrected LED screen cannot be overcome in the process of correcting each lamp point in the LED screen in the prior art is solved.
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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a display screen calibration method according to an embodiment of the invention;
FIG. 2 is a flowchart illustrating an implementation of a method for calibrating a display screen according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a first mode of a method for calibrating a display screen according to an embodiment of the invention;
FIG. 4 is a diagram illustrating angle and full-screen surface coefficients in a method for calibrating a display screen according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a second mode of a method for calibrating a display screen according to an embodiment of the invention;
fig. 6 is a schematic diagram of a correction device of a display screen according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method for correcting a display screen, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
Fig. 1 is a schematic flow chart of a correction method of a display screen according to an embodiment of the present invention, and as shown in fig. 1, the correction method of the display screen provided in the embodiment of the present application includes the following steps:
s102, acquiring the brightness and chrominance information of each lamp point through the relative movement of image acquisition equipment and a screen body;
specifically, the image capturing device provided in the embodiment of the present application may include a CCD/CMOS camera (hereinafter referred to as a camera for short), and the camera captures luminance and chrominance information of each lamp point in the display device (display screen).
It should be noted that, in the embodiment of the present application, only the CCD/CMOS camera is taken as an example for description, so as to implement the correction method of the display screen provided in the embodiment of the present application, which is not particularly limited.
In the embodiment of the present application, the screen body may be a display screen body formed by one box body, or may be a display screen body formed by a plurality of box bodies, one box body is formed by at least one lamp panel, and one lamp panel is provided with a plurality of lamp points, so that the mobile box body is equivalent to the mobile screen body, and in the relative movement process of the camera or the box bodies, the brightness information acquired by the camera is the brightness information of each lamp point in the screen body.
Step S104, calculating according to the brightness and chroma information of each lamp point to obtain the curved surface coefficient of each lamp point;
specifically, the curve surface coefficient of each lamp point can be calculated in two ways in the embodiment of the application, namely, in the first way, the luminance and chrominance information of each lamp point is acquired by translating the camera or the box body, and the curve surface coefficient of each lamp point is calculated; and secondly, moving the camera or the box body in the normal direction to acquire the brightness and chroma information of each lamp point, and calculating to acquire the curved surface coefficient of each lamp point.
The surface coefficients of the light points may be surface coefficients of the light points on at least one light panel of a single box body, or surface coefficients of the light points on a screen body composed of a plurality of light panels on at least two box bodies, that is, the surface coefficients of the light points acquired in this embodiment may be full-screen surface coefficients, or non-full-screen surface coefficients, for example, when the surface coefficients of all the light points on all the light panels on the screen body are acquired, the surface coefficients are calculated according to the surface coefficients of all the light points to obtain full-screen surface coefficients, or when the surface coefficients of the light points on part of the light panels on the screen body are acquired, the surface coefficients are calculated according to the surface coefficients of the light points on part of the light panels to obtain non-full-screen surface coefficients.
And S106, carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain a corrected image.
Specifically, as shown in fig. 2, fig. 2 is a schematic diagram of an execution flow of the correction method of the display screen according to the embodiment of the present invention, and based on the curved surface coefficient of each light point obtained in step S104, in combination with the first method, an included angle between each light point in the LED display screen and the camera in the horizontal and/or vertical direction is obtained, and according to the included angle and the change of brightness, the curved surface coefficient is calculated and corrected by applying the curved surface coefficient; and in a second combination mode, acquiring an included angle between each lamp point in the LED display screen and the camera in the normal direction, which is acquired by the camera, calculating a curved surface coefficient according to the included angle and the brightness change, and correcting the curved surface coefficient by using the curved surface coefficient.
And step S108, correcting the display screen according to the corrected image.
And correcting the display screen based on the corrected image in the step S106, so that the uniformity of the LED screen is improved.
Optionally, before acquiring the luminance and chrominance information of each lamp point by relatively moving the image acquisition device and the screen body in step S102, the method for correcting the display screen according to the embodiment of the present invention further includes: step S101, correcting a screen body; in step S101, the screen body is corrected, including but not limited to, luminance correction, or chrominance correction.
And combining the step S101 and the step S108, correcting the screen body, acquiring brightness and chrominance information of each lamp point in the corrected screen body, which moves relative to the image acquisition equipment or the screen body, calculating a curved surface coefficient of each lamp point according to the brightness and chrominance information, performing curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient to obtain a corrected image, and finally further correcting the display screen according to the corrected image, so that the correction accuracy and the correction efficiency of the uniformity of the LED display screen are improved.
Optionally, the brightness and chrominance information includes multiple groups of brightness and chrominance information, where each group of brightness and chrominance information is obtained by collecting brightness and chrominance of the image collection device and the same lamp point of the screen body at different relative positions.
In summary, the correction method of the display screen provided in the embodiment of the present application is specifically as follows:
in the first mode, a translation camera or a box body acquires brightness and chrominance information of each lamp point, and full-screen curved surface coefficients of each lamp point are calculated;
optionally, the step S102 of acquiring the luminance and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body includes:
at least twice, moving an image acquisition device or a screen body in the horizontal direction, and acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point to obtain first-type brightness and chrominance information, wherein the first-type brightness and chrominance information comprises: at least two groups of brightness and chrominance information of the image acquisition equipment and the same lamp point in different relative positions in the horizontal direction; and/or the presence of a gas in the gas,
and moving the image acquisition equipment or the screen body in the vertical direction at least twice, and acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point to obtain second-type brightness and chrominance information, wherein the second-type brightness and chrominance information comprises: and at least two groups of brightness and chrominance information of the image acquisition equipment and the same lamp point in different relative positions in the vertical direction.
Further, optionally, the step S104 of calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point includes: three implementation scenarios are described, in which,
case 1: calculating first-class variation coefficients of different position variations of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first-class brightness information; determining the first type of change coefficient as the surface coefficient of each lamp point;
case 2: calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information; determining the second type of change coefficient as the surface coefficient of each lamp point;
case 3: calculating first-class variation coefficients of different position variations of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first-class brightness information; calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information; and calculating according to the first type of change coefficient and the second type of change coefficient to obtain the curved surface coefficient of each lamp point.
Unlike cases 1 and 2, case 3 is to obtain a much higher accuracy of surface coefficients than cases 1 and 2 because both the horizontal direction and the vertical direction are referenced.
Specifically, as shown in fig. 3, fig. 3 is a schematic diagram of a first mode in a correction method of a display screen according to an embodiment of the present invention.
The first step is as follows: the translation camera or the housing collects data.
The camera collects data twice to form a group, the camera or the box body is moved horizontally to generate a curved surface in the horizontal direction, the camera or the box body is moved vertically to generate a curved surface in the vertical direction, and finally the full-screen curved surface coefficient can be obtained by combining the two.
Example 1: definition L11 represents the luminance information captured the first time by the first lamp, L12 represents the luminance information captured the second time by the first lamp, and so on. Q11 indicates the angle formed by the first light spot when it was photographed for the first time and the camera center, and Q12 indicates the angle formed by the first light spot when it was photographed for the second time and the camera center. Where L11, Q11, etc. may be extended to the average of the columns in which they are located, i.e., the same column is the same coordinate on the horizontal coordinate, so that the luminance information of the lamps located in the same column as the first lamp can be obtained with reference to L11 and Q11.
The second step is that: calculating the calibration coefficient of the curved surface
Example 1: as exemplified in the first step. Assuming that Q31 represents the shooting result at the time of perfect verticality (Q31 is 0 degree), L32/L31 is the light distribution brightness of the LED under the angle of Q32. L32/L31 can completely remove the non-uniformity effect of the LED screen itself. For example, the L2 lamps are also located at an angle of Q32 at a certain lamp point in the first shot (Q21 — Q32). The change coefficient from the angle of Q21 to the angle of Q22 can be obtained through L22/L21, so the light distribution brightness coefficient under the angle of Q22 is as follows: L32/L31L 22/L21, spread sequentially, can get the luminance coefficient of grading under almost all angles. As shown in fig. 4, fig. 4 is a schematic diagram of an angle and a full-screen curved surface coefficient in the correction method of the display screen according to the embodiment of the present invention, and a Right point, namely, a light distribution luminance coefficient from 0 degree to about 20 degrees can be obtained by Q31 through the diffusion. Similarly, light distribution brightness coefficients (i.e., curved surface coefficients in the embodiment of the present application) of other colors and directions can be obtained.
Moving a camera or a box body in the normal direction to acquire the brightness and chroma information of each lamp point, and calculating to acquire a full-screen curved surface coefficient of each lamp point;
optionally, the step S102 of acquiring the luminance and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body includes: and acquiring the brightness and chrominance information of the same lamp point in each lamp point relative to the image acquisition equipment at different distances in the normal direction by moving the image acquisition equipment or the screen body along the normal line at least twice to obtain at least two groups of brightness and chrominance information.
Further, optionally, the step S104 of calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point includes: calculating a variation coefficient of distance variation of the same lamp point relative to the image acquisition equipment in the normal direction according to at least two groups of brightness information; and determining the change coefficient as the surface coefficient of each lamp point.
Specifically, as shown in fig. 5, fig. 5 is a schematic diagram of a second mode in the correction method of the display screen according to the embodiment of the present invention.
The first step is as follows: the normal direction moves the camera or the box to collect data.
The camera collects data twice as a group, the data is collected once when the distance between the camera and the box body is far, the camera moves back and forth in the normal direction of the box body, and the data is collected for the second time when the distance between the camera and the box body is close. And calculating to generate a surface coefficient according to the twice acquired data.
Example 1: take the horizontal direction as an example. Definition L11 represents the luminance information of the first shot of the first lamp at a first distance, L12 represents the luminance information of the second shot of the first lamp at a second distance, wherein the first distance is greater than the second distance, and so on. Q11 indicates the angle formed by the first light spot when it was photographed for the first time and the camera center, and Q12 indicates the angle formed by the first light spot when it was photographed for the second time and the camera center.
The second step: calculating the calibration coefficient of the curved surface
Example 1: as exemplified in the first step. Through the information of the brightness and the chroma of the same lamp which is lighted twice by the L31 and the L32, the data collected by the camera twice are normalized to the same level, and the normalization coefficient is NormRatio. Assuming that Q21 is obtained by shooting from a certain angle when the angle is far, and approaches to 0 degree, L22/L21 × NormRatio is the light distribution brightness of the LED at an angle of Q22. The L22/L21 can completely remove the non-uniformity effect of the LED screen itself. At a certain lamp point in the first image, L11 is also at the angle of Q22 (Q11 — Q22), for example. The change coefficient from the angle Q11 to the angle Q12 can be obtained through L12/L11, so the light distribution brightness under the angle Q12 is as follows: (L22/L21 NormRatio) (L12/L11 NormRatio), and by diffusing them in this order, the luminance coefficients of light distribution at almost all angles can be obtained. The normal surface calibration coefficients can be obtained by diffusion at different distances from the normal, as well as the surface calibration coefficients in the horizontal and vertical directions.
In the embodiment of the present invention, the luminance is taken as an example for explaining when the surface coefficient is calculated, and similarly, the full-screen surface coefficient is calculated according to the chrominance information and can be obtained by the correction method of the display method of the embodiment of the present invention, and finally the luminance and chrominance information is subjected to surface correction.
In the embodiment of the invention, the brightness and chroma information of each lamp point is acquired by the relative movement of the image acquisition equipment and the box body; calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point; carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain a corrected image; the display screen is corrected according to the corrected image, the effects of the camera vignetting and the LED light distribution curve are calibrated through the translation of the camera and the box body, and the aim of correcting the curved surface of the data collected by the camera by utilizing the calibration result is fulfilled, so that the corrected LED display screen is more uniform, the technical effect that the LED box body can be spliced randomly is achieved, and the technical problem that the poor driving effect of the corrected LED screen cannot be overcome in the process of correcting each lamp point in the LED screen in the prior art is solved. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Example 2
According to another aspect of the embodiments of the present invention, there is further provided a correction device for a display screen, fig. 6 is a schematic diagram of the correction device for a display screen according to the embodiments of the present invention, as shown in fig. 6, applied to the correction method for a display screen in embodiment 1, the correction device for a display screen provided in the embodiments of the present application includes: the acquisition module 62 is used for acquiring the brightness and chrominance information of each lamp point through the relative movement of the image acquisition equipment and the box body; the calculation module 64 is configured to perform calculation according to the brightness and chrominance information of each lamp point to obtain a curved surface coefficient of each lamp point; the first correction module 66 is configured to perform curved surface correction on the image acquired by the image acquisition device according to the curved surface coefficient of each light point, so as to obtain a corrected image; and a second correction module 68 for correcting the display screen according to the corrected image.
Optionally, the correction device for a display screen provided in the embodiment of the present application further includes: and the third correction module is used for correcting the screen body before acquiring the brightness and chrominance information of each lamp point through the relative movement of the image acquisition equipment and the screen body.
Optionally, the brightness and chrominance information includes multiple groups of brightness and chrominance information, where each group of brightness and chrominance information is obtained by collecting brightness and chrominance of the image collection device and the same lamp point of the screen body at different relative positions.
Further, optionally, the acquisition module 62 includes: the first acquisition unit is used for acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point by moving the image acquisition equipment or the screen body in the horizontal direction at least twice to obtain first-type brightness and chrominance information, wherein the first-type brightness and chrominance information comprises: at least two groups of brightness and chrominance information of the image acquisition equipment and the same lamp point in different relative positions in the horizontal direction; and/or the second acquisition unit is used for acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point by moving the image acquisition equipment or the screen body in the vertical direction at least twice to obtain second-type brightness and chrominance information, wherein the second-type brightness and chrominance information comprises: and at least two groups of brightness and chrominance information of the image acquisition equipment and the same lamp point in different relative positions in the vertical direction.
Optionally, the calculating module 64 includes: the first calculation unit is used for calculating first-class variation coefficients of different position variations of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first-class brightness information; and determining the first type of change coefficient as the surface coefficient of each lamp point.
Optionally, the calculation module 64 includes: the second calculation unit is used for calculating second type change coefficients of different position changes of the same lamp point relative to the image acquisition equipment in the vertical direction according to the second type brightness and chrominance information; and determining the second type of change coefficient as the surface coefficient of each lamp point.
Optionally, the calculation module 64 includes: the third calculating unit is used for calculating first-class variation coefficients of different position variations of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first-class brightness information; calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information; and calculating according to the first type of change coefficient and the second type of change coefficient to obtain the curved surface coefficient of each lamp point.
Optionally, the collecting module 62 includes: and the third acquisition unit is used for acquiring the brightness and chrominance information of the same lamp point in each lamp point relative to the image acquisition equipment at different distances in the normal direction by moving the image acquisition equipment or the screen body along the normal line at least twice to obtain at least two groups of brightness and chrominance information.
Further, optionally, the calculation module 64 includes: the fourth calculation unit is used for calculating a variation coefficient of distance variation of the same lamp point relative to the image acquisition equipment in the normal direction according to the at least two groups of luminance and chrominance information; and determining the change coefficient as the surface coefficient of each lamp point.
Example 3
According to another aspect of the embodiments of the present invention, there is also provided a nonvolatile storage medium, where the nonvolatile storage medium includes a stored program, and where a device in which the nonvolatile storage medium is controlled to execute the method in the above embodiment 1 when the program runs.
Example 4
According to another aspect of the embodiments of the present invention, there is also provided a processor, where the processor is configured to execute a program, where the program executes the method in embodiment 1.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, units or modules, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A method for correcting a display screen, comprising:
acquiring the brightness and chrominance information of each lamp point through the relative movement of the image acquisition equipment and the screen body;
calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point;
carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain the corrected image;
correcting the display screen according to the corrected image;
the calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point comprises the following steps: calculating according to at least one of first type of brightness and chrominance information and second type of brightness and chrominance information included in the brightness and chrominance information to obtain a curved surface coefficient of each lamp point, wherein the first type of brightness and chrominance information comprises: at least two groups of brightness and chrominance information which are acquired by the image acquisition equipment and the same lamp point in each lamp point at different relative positions in the horizontal direction; the second type of luminance and chrominance information comprises: and at least two groups of brightness and chrominance information which are acquired by the image acquisition equipment and the same lamp point in the lamp points at different relative positions in the vertical direction.
2. The method of claim 1, wherein prior to said acquiring the luminance and chrominance information for each lamp point by relative movement of the image acquisition device and the screen body, the method further comprises: and correcting the screen body.
3. The method of claim 1, wherein the acquiring the luminance and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body comprises:
moving the image acquisition equipment or the screen body in the horizontal direction at least twice, and acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point to obtain first-type brightness and chrominance information, wherein the first-type brightness and chrominance information comprises: at least two groups of luminance and chrominance information of the image acquisition equipment and the same lamp point in each lamp point at different relative positions in the horizontal direction;
and/or the presence of a gas in the gas,
moving the image acquisition equipment or the screen body in the vertical direction at least twice, and acquiring the brightness and chrominance information of the same lamp point in different relative positions in each lamp point to obtain second-type brightness and chrominance information, wherein the second-type brightness and chrominance information comprises: and at least two groups of luminance and chrominance information of the image acquisition equipment and the same lamp point in the lamp points at different relative positions in the vertical direction.
4. The method of claim 3, wherein the calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point comprises:
calculating first type change coefficients of different position changes of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first type brightness and chrominance information;
and determining the first type of change coefficient as the surface coefficient of each lamp point.
5. The method of claim 3, wherein the calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point comprises:
calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information;
and determining the second type of change coefficient as the surface coefficient of each lamp point.
6. The method of claim 3, wherein the calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point comprises:
calculating first type change coefficients of different position changes of the same lamp point relative to the image acquisition equipment in the horizontal direction according to the first type brightness and chroma information;
calculating a second type of change coefficient of the same lamp point relative to the image acquisition equipment in different position changes in the vertical direction according to the second type of brightness and chrominance information;
and calculating according to the first type of change coefficient and the second type of change coefficient to obtain the surface coefficient of each lamp point.
7. The method of claim 1, wherein the acquiring the luminance and chrominance information of each lamp point by the relative movement of the image acquisition device and the screen body comprises:
and moving the image acquisition equipment or the screen body along the normal line at least twice, and acquiring the brightness and chrominance information of the same lamp point in each lamp point relative to the image acquisition equipment at different distances in the normal line direction to obtain at least two groups of brightness and chrominance information.
8. The method of claim 7, wherein the calculating according to the luminance and chrominance information of each lamp point to obtain the surface coefficient of each lamp point comprises:
calculating a variation coefficient of distance variation of the same lamp point relative to the image acquisition equipment in the normal direction according to the at least two groups of luminance and chrominance information;
and determining the change coefficient as the surface coefficient of each lamp point.
9. A correction device for a display screen, which is applied to the method of any one of claims 1 to 8, and comprises:
the acquisition module is used for acquiring the brightness and chrominance information of each lamp point through the relative movement of the image acquisition equipment and the box body;
the calculation module is used for calculating according to the brightness and chrominance information of each lamp point to obtain the curved surface coefficient of each lamp point;
the first correction module is used for carrying out curved surface correction on the image acquired by the image acquisition equipment according to the curved surface coefficient of each lamp point to obtain the corrected image;
the second correction module is used for correcting the display screen according to the corrected image;
the calculation module is further configured to calculate according to at least one of first type luminance and chrominance information and second type luminance and chrominance information included in the luminance and chrominance information, so as to obtain a surface coefficient of each lamp point, where the first type luminance and chrominance information includes: at least two groups of brightness and chrominance information which are acquired by the image acquisition equipment and the same lamp point in each lamp point at different relative positions in the horizontal direction; the second type of luminance and chrominance information comprises: and at least two groups of brightness and chrominance information which are acquired by the image acquisition equipment and the same lamp point in the lamp points at different relative positions in the vertical direction.
10. A non-volatile storage medium, wherein the non-volatile storage medium comprises a stored program, wherein a device on which the non-volatile storage medium is located is controlled to perform the method of any one of claims 1 to 8 when the program is run.
11. A processor, wherein the processor is configured to run a program, wherein the program when running performs the method of any one of claims 1 to 8.
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| CN112884681B (en) * | 2021-04-28 | 2021-09-17 | 卡莱特云科技股份有限公司 | Image shadow processing method and device, computer equipment and storage medium |
| CN112947885B (en) * | 2021-05-14 | 2021-08-06 | 深圳精智达技术股份有限公司 | Method and device for generating curved surface screen flattening image |
| CN117321666A (en) * | 2022-04-28 | 2023-12-29 | 西安青松光电技术有限公司 | LED lamp panel correction method and device, electronic equipment and storage medium |
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