CN113160043B - Mura processing method and device for flexible display screen - Google Patents
Mura processing method and device for flexible display screen Download PDFInfo
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- CN113160043B CN113160043B CN202110556801.6A CN202110556801A CN113160043B CN 113160043 B CN113160043 B CN 113160043B CN 202110556801 A CN202110556801 A CN 202110556801A CN 113160043 B CN113160043 B CN 113160043B
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- 238000001514 detection method Methods 0.000 claims abstract description 125
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- 238000013507 mapping Methods 0.000 claims abstract description 24
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- G—PHYSICS
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformations in the plane of the image
- G06T3/04—Context-preserving transformations, e.g. by using an importance map
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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Abstract
The invention provides a mura processing method and a mura processing device for a flexible display screen. The mura processing method of the flexible display screen comprises the following steps: acquiring a mura detection image of the flexible display screen; acquiring a first detection image when the flexible display screen displays a dot matrix picture, wherein the dot matrix picture comprises a plurality of dots distributed in an array; fitting by utilizing points in the first detection image to obtain a first curved surface; restoring the first curved surface into a first plane according to the coordinate parameters of points in the first detection image and the distance parameters between the points to obtain the mapping relation between the first detection image and the first plane; and restoring the mura detection image of the flexible display screen according to the mapping relation to obtain mura information of the flexible display screen. According to the processing method provided by the embodiment of the invention, mura information of the flexible display screen can be restored to the greatest extent, the accuracy in the subsequent compensation is ensured, and the display quality of the flexible display screen is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a mura processing method and device of a flexible display screen.
Background
For OLED (organic light-Emitting Diode) products, various mura, that is, uneven brightness display, is unavoidable in OLED products due to factors such as organic light-Emitting materials and processes, and the mura can be compensated by adopting a demura (optical compensation) method. demura has very obvious effect on improving the image quality, but if the processing is not good, negative effects can be caused, wherein the accuracy of mura information extraction is particularly important.
When mura information is acquired, in the conventional demura photographing, only four corners of the display area are generally selected to generate alignment information, and the mura information is processed by calculating the difference between the display information obtained by actual photographing and the display information of the set display area. However, since the flexible display module is generally thinner, the problems of warpage, deformation and the like are difficult to avoid, and deformation such as warpage and the like is unavoidable when the flexible display screen is placed on a station during demura photographing, the deformation finally reflected at the edge of a display area can be very large, so that demura algorithm cannot be processed, photographing precision and mura information extraction precision are affected, and finally brightness compensation is offset.
Disclosure of Invention
In view of the above, the invention provides a mura processing method and apparatus for a flexible display screen, which can solve the problems in the prior art that the accuracy of the extracted mura information is reduced and finally the brightness compensation is deviated due to the warpage, deformation and the like of the flexible display screen.
In order to solve the technical problems, the invention adopts the following technical scheme:
an embodiment of a first aspect of the present invention provides a mura processing method for a flexible display screen, including:
Acquiring a mura detection image of the flexible display screen;
Acquiring a first detection image when the flexible display screen displays a dot matrix picture, wherein the dot matrix picture comprises a plurality of dots distributed in an array;
fitting by utilizing points in the first detection image to obtain a first curved surface;
restoring the first curved surface into a first plane according to the coordinate parameters of points in the first detection image and the distance parameters between the points to obtain the mapping relation between the first detection image and the first plane;
And restoring the mura detection image of the flexible display screen according to the mapping relation to obtain mura information of the flexible display screen.
Optionally, the obtaining the first curved surface by using the point fitting in the first detection image includes:
Acquiring the coordinate parameters of each point in the dot matrix picture and the first detection image and the distance parameters between each point to obtain the corresponding relation between each point in the dot matrix picture and the first detection image;
And fitting the points in the first detection image according to the corresponding relation to obtain a first curved surface.
Optionally, the fitting the points in the first detection image according to the correspondence, to obtain a first curved surface includes:
dividing points in the first detection image into a plurality of sub-lattices, wherein each sub-lattice comprises a first number of points;
performing surface fitting by utilizing the points in each sub-lattice to obtain a plurality of second curved surfaces;
And splicing the second curved surfaces to obtain a first curved surface.
Optionally, before the restoring the first curved surface to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points, the method further includes:
Obtaining a second detection image when the flexible display screen displays black and white checkered pictures, wherein the black and white checkered pictures comprise a plurality of checkered pictures distributed in an array, and one checkered picture in the black and white checkered pictures corresponds to a first number of points in the dot matrix pictures;
Acquiring the side edges of the checkerboard in the second detection image, and comparing the curved edges of the second curved surface with the corresponding side edges of the checkerboard;
The restoring the first curved surface to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points includes:
and under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition, restoring the coordinate parameters of the points in the first detection image and the distance parameters between the points.
Optionally, the number of dots in the dot matrix picture corresponding to a checkerboard in the black-white checkerboard picture is at least 9.
An embodiment of the second aspect of the present invention further provides a mura processing apparatus for a flexible display screen, including:
the first acquisition module is used for acquiring a mura detection image of the flexible display screen;
The second acquisition module is used for acquiring a first detection image when the flexible display screen displays a dot matrix picture, wherein the dot matrix picture comprises a plurality of dots distributed in an array;
The fitting module is used for fitting by utilizing points in the first detection image to obtain a first curved surface;
The mapping module is used for restoring the first curved surface to a first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points to obtain the mapping relation between the first detection image and the first plane;
And the restoring module is used for restoring the mura detection image of the flexible display screen according to the mapping relation to obtain mura information of the flexible display screen.
Optionally, the fitting module includes:
The corresponding relation acquisition unit is used for acquiring the coordinate parameters of each point in the dot matrix picture and the first detection image and the distance parameters between each point to obtain the corresponding relation between each point in the dot matrix picture and the first detection image;
and the fitting unit is used for fitting the points in the first detection image according to the corresponding relation to obtain a first curved surface.
Optionally, the fitting unit includes:
A dividing subunit, configured to divide points in the first detection image into a plurality of sub-lattices, where each sub-lattice includes a first number of points;
The fitting subunit is used for carrying out surface fitting by utilizing the points in each sub-lattice to obtain a plurality of second curved surfaces;
and the splicing subunit is used for splicing the plurality of second curved surfaces to obtain a first curved surface.
Optionally, the apparatus further includes:
The third acquisition module is used for acquiring a second detection image when the flexible display screen displays black and white checkered pictures, wherein the black and white checkered pictures comprise a plurality of checkered patterns distributed in an array, and one checkered pattern in the black and white checkered pictures corresponds to a first number of points in the dot matrix pictures;
a fourth obtaining module, configured to obtain a side edge of a checkerboard in the second detection image, and compare a curved edge of the second curved surface with a corresponding side edge of the checkerboard;
The reduction module includes:
And the reduction unit is used for reducing the coordinate parameters of the points in the first detection image and the distance parameters between the points under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition.
Optionally, the number of dots in the dot matrix picture corresponding to a checkerboard in the black-white checkerboard picture is at least 9.
The technical scheme of the invention has the following beneficial effects:
according to the processing method provided by the embodiment of the invention, the curved surface is restored to the plane by displaying the dot matrix picture, so that the accuracy of mura information restoration of the flexible display screen can be ensured to the greatest extent, the accuracy of the flexible display screen during the subsequent compensation is improved, and the display effect of the flexible display screen is improved.
Drawings
Fig. 1 is a schematic flow chart of a mura processing method of a flexible display screen according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of a dot matrix picture according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a black and white checkerboard picture according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a corresponding relationship between a checkerboard and a lattice according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a curved edge of a second curved surface obtained by fitting a sub-lattice in a first detection image according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating comparison between curved edges of a second curved surface and sides of a checkerboard according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a mura processing apparatus with a flexible display screen according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Referring to fig. 1, a flow chart of a mura processing method of a flexible display screen according to an embodiment of the invention is shown. As shown in fig. 1, the mura processing method of the flexible display screen in the embodiment of the invention includes the following steps:
step 101: acquiring a mura detection image of the flexible display screen;
In the step, the flexible display screen can be displayed under a plurality of gray scales, and then the flexible display screen is subjected to planar shooting through shooting equipment, so that a plurality of mura detection images of the flexible display screen are obtained. It should be noted that, since the flexible display screen is generally thin, there are problems such as warpage and deformation, which are unavoidable, and when the demura is photographed, the flexible display screen is placed on a workstation and deformation such as warpage is unavoidable, so that a certain deviation exists between mura information in a mura detection image of the obtained flexible display screen and actual mura information.
Step 102: acquiring a first detection image when the flexible display screen displays a dot matrix picture, wherein the dot matrix picture comprises a plurality of dots distributed in an array;
Fig. 2 is a schematic diagram of a dot matrix picture according to an embodiment of the invention. As shown in fig. 2, the dot matrix picture in the embodiment of the invention may be a black matrix white dot, a plurality of white dots are distributed in an array, the distances between any two adjacent dots are the same, and the distances can be adjusted and determined according to actual conditions. When the first detection image is obtained, the flexible display screen can be enabled to display the dot matrix picture in a full screen mode, then the flexible display screen is subjected to planar shooting through shooting equipment, and then the first detection image when the dot matrix picture is displayed on the flexible display screen can be obtained. It can be known that there are also a plurality of points in the first detection image.
Step 103: fitting by utilizing points in the first detection image to obtain a first curved surface;
Alternatively, surface fitting may be performed by using all points (discrete points) in the first detection image, so as to obtain a first curved surface, where the first curved surface characterizes an actual spatial shape of the flexible display screen; of course, fitting may be performed by using every preset number of points (discrete points) in the first detection image, so as to obtain a segmented curved surface with a small area, and then splicing the curved surfaces to obtain a complete first curved surface.
Step 104: restoring the first curved surface into a first plane according to the coordinate parameters of points in the first detection image and the distance parameters between the points to obtain the mapping relation between the first detection image and the first plane;
Because the flexible display screen is deformed, the coordinates of the points in the first detection image obtained by shooting are offset to a certain extent, the coordinates of the points in the dot matrix image are deviated from the coordinates of the points, the distances between the points are changed and are not equidistant, and therefore, the first curved surface can be restored to a first plane by restoring the coordinate parameters of the points in the first detection image and the distance parameters between the points, the plane corresponds to the flexible display screen which is not deformed, and then the mapping relation between the first detection image and the first plane can be obtained, namely, the mapping relation between the points on the first detection image and the points on the first plane is solved.
Step 105: and restoring the mura detection image of the flexible display screen according to the mapping relation to obtain mura information of the flexible display screen.
The mapping relation characterizes the mapping relation between the first detection image and the first plane, which is equivalent to the mapping relation between the image shot when the flexible display screen displays the picture and the image shot when the flexible display screen displays the picture without deformation, so that after the mapping relation is obtained, the mura detection image of the flexible display screen can be restored by utilizing the mapping relation to obtain mura information of the flexible display screen, and the obtained mura information is real mura information of the flexible display screen and is not interfered by the deformation of the flexible display screen, so that the accuracy of compensating and removing mura by using the mura information obtained by the method in the embodiment of the invention can be ensured.
According to the processing method provided by the embodiment of the invention, mura information of the flexible display screen can be restored to the greatest extent, the accuracy in the subsequent compensation is ensured, and the display quality of the flexible display screen is improved.
In some embodiments of the present invention, the fitting the first curved surface by using the points in the first detection image includes:
Acquiring the coordinate parameters of each point in the dot matrix picture and the first detection image and the distance parameters between each point to obtain the corresponding relation between each point in the dot matrix picture and the first detection image;
And fitting the points in the first detection image according to the corresponding relation to obtain a first curved surface.
Specifically, in the process of obtaining the first curved surface by using the point fitting in the first detection image, the coordinate parameters of each point in the dot matrix picture, the distance parameters between each point, the coordinate parameters of each point in the first detection image, and the distance parameters between each point can be obtained first, because the coordinates of the points in the first detection image obtained by shooting will shift to a certain extent due to the deformation of the flexible display screen, the deviation from the coordinates of the points in the dot matrix picture will occur, the distance between the points will also change, and the corresponding relationship between the points in the dot matrix picture and the first detection image, namely, the deformation condition of the flexible display screen is reflected, so that the point in the first detection image can be subjected to the curved surface fitting according to the corresponding relationship, and the first curved surface is obtained.
In other embodiments of the present invention, the fitting the points in the first detection image according to the correspondence relationship to obtain a first curved surface includes:
dividing points in the first detection image into a plurality of sub-lattices, wherein each sub-lattice comprises a first number of points;
performing surface fitting by utilizing the points in each sub-lattice to obtain a plurality of second curved surfaces;
And splicing the second curved surfaces to obtain a first curved surface.
Optionally, when fitting the points in the first detection image, considering the amount of operation data and difficulty of surface fitting, the points in the first detection image may be divided into a plurality of sub-lattices, where each sub-lattice includes a first number of points, then, for each point in the sub-lattice, surface fitting may be performed only by using the points in the same sub-lattice according to the corresponding relationship, to obtain a second curved surface, and the plurality of sub-lattices may obtain a plurality of second curved surfaces, and then, by splicing the plurality of second curved surfaces, a complete first curved surface may be obtained, so that the amount of operation and the operation difficulty when fitting the curved surface may be reduced.
In other embodiments of the present invention, before the restoring the first curved surface to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points, the method further includes:
Obtaining a second detection image when the flexible display screen displays black and white checkered pictures, wherein the black and white checkered pictures comprise a plurality of checkered pictures distributed in an array, and one checkered picture in the black and white checkered pictures corresponds to a first number of points in the dot matrix pictures;
Acquiring the side edges of the checkerboard in the second detection image, and comparing the curved edges of the second curved surface with the corresponding side edges of the checkerboard;
The restoring the first curved surface to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points includes:
and under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition, restoring the coordinate parameters of the points in the first detection image and the distance parameters between the points.
That is, before the first curved surface is restored to the first plane, it is necessary to determine whether the fitted first curved surface is accurate, and if the fitted first curved surface generates a large error, the mura information obtained by the final restoration will be inaccurate.
Referring to fig. 3 to 6, fig. 3 is a schematic diagram of a black-and-white checkerboard picture provided by an embodiment of the present invention, fig. 4 is a schematic diagram of a corresponding relationship between a checkerboard and a lattice provided by an embodiment of the present invention, fig. 5 is a schematic diagram of a curved edge of a second curved surface obtained by fitting a sub-lattice in a first detection image provided by an embodiment of the present invention, and fig. 6 is a schematic diagram of a curved edge of a second curved surface compared with a side edge of a checkerboard provided by an embodiment of the present invention. In the embodiment of the invention, optionally, the second detection image when the black-white checkerboard picture is displayed on the flexible display screen is firstly obtained, wherein the black-white checkerboard picture comprises a plurality of checkerboards distributed in an array, the black checkerboard and the white checkerboard are alternately arranged, the shape of the checkerboard is square, one checkerboard in the black-white checkerboard picture corresponds to the first number of points in the dot matrix picture, when the black-white checkerboard picture and the dot matrix picture are overlapped together, one checkerboard contains the first number of points, and the points on the four corners are located on the four vertexes of the checkerboard in the first number of points (namely in one sub-dot matrix). As shown in fig. 4, taking the first number of 9 as an example, four points on four corners of 9 points fall on four vertices of the checkerboard, and four points respectively fall on midpoints of four sides of the checkerboard, so that one point falls on a center point of the checkerboard.
When the second detection image is obtained, the black-and-white checkerboard picture can be displayed on the flexible display screen in a full screen mode, then the flexible display screen is subjected to planar shooting through shooting equipment, and the second detection image when the black-and-white checkerboard picture is displayed on the flexible display screen can be obtained. It can be known that a plurality of checkerboards are also present in the second detection image, and due to the deformation of the flexible display screen, the shape of the checkerboard in the second detection image obtained by shooting will be deformed to a certain extent, and deviation is generated between the shape of the checkerboard and the checkerboard in the black-white checkerboard picture.
After the second detection image is obtained, the sides of the checkerboard in the second detection image are further extracted, and then the curved edges of the second curved surface obtained by fitting one sub-lattice in the previous step are compared, and it is noted that the second curved surface and the checkerboard to be compared have a corresponding relationship, that is, the second curved surface and the checkerboard to be compared correspond to the same position on the flexible display screen.
In the embodiment of the invention, under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition, the coordinate parameters of the points in the first detection image and the distance parameters between the points can be restored. That is, by judging whether or not the error between the curved edge of the second curved surface and the side edge of the black-and-white checkerboard is within a preset error range, for example, calculating the distance error of the points on the corresponding curved edge and side edge, the restoration of the first curved surface is performed in the case that the error is within the preset error range. Therefore, before the first curved surface is restored to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points, whether the first curved surface is restored or not is determined by judging whether the result of curved surface fitting meets the requirement or not, the fitting effect of the first curved surface can be ensured, and the accuracy of mura information obtained by subsequent restoration is ensured to the greatest extent.
In some embodiments of the present invention, the number of points in the dot matrix picture corresponding to a checkerboard in the black-white checkerboard picture is at least 9, so as to ensure the number of discrete points during the surface fitting, and further ensure the fitting effect of the surface. Alternatively, it may be known that, in general, the more the number of points in the dot matrix picture corresponding to a checkerboard in the black-white checkerboard picture, the more discrete points that can be used for performing surface fitting, and the better the surface fitting effect.
According to the processing method provided by the embodiment of the invention, the curved surface is restored to the plane by respectively displaying the dot matrix picture and the black-white checkered picture, so that the accuracy of mura information restoration of the flexible display screen can be ensured to the greatest extent, the accuracy of the flexible display screen during the subsequent compensation is improved, and the display quality of the flexible display screen is improved.
It should be noted that, in the mura processing method for a flexible display screen provided in the embodiment of the present invention, the execution body may be a mura processing device for a flexible display screen, or a control module for executing the mura processing method for a flexible display screen in the mura processing device for a flexible display screen. In the embodiment of the invention, a mura processing method of a flexible display screen executed by a mura processing device of the flexible display screen is taken as an example, and the mura processing device of the flexible display screen provided by the embodiment of the invention is described.
Fig. 7 is a schematic structural diagram of a mura processing apparatus with a flexible display screen according to an embodiment of the present invention. As shown in fig. 7, in an embodiment of the present invention, the apparatus 70 includes:
A first acquisition module 71, configured to acquire a mura detection image of the flexible display screen;
A second obtaining module 72, configured to obtain a first detection image when the flexible display screen displays a dot matrix picture, where the dot matrix picture includes a plurality of dots distributed in an array;
a fitting module 73, configured to obtain a first curved surface by using point fitting in the first detection image;
The mapping module 74 is configured to restore the first curved surface to a first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points, so as to obtain a mapping relationship between the first detection image and the first plane;
And the restoring module 75 is configured to restore the mura detection image of the flexible display screen according to the mapping relationship, so as to obtain mura information of the flexible display screen.
According to the processing method provided by the embodiment of the invention, mura information of the flexible display screen can be restored to the greatest extent, the accuracy in the subsequent compensation is ensured, and the display quality of the flexible display screen is improved.
Optionally, the fitting module includes:
The corresponding relation acquisition unit is used for acquiring the coordinate parameters of each point in the dot matrix picture and the first detection image and the distance parameters between each point to obtain the corresponding relation between each point in the dot matrix picture and the first detection image;
and the fitting unit is used for fitting the points in the first detection image according to the corresponding relation to obtain a first curved surface.
Optionally, the fitting unit includes:
A dividing subunit, configured to divide points in the first detection image into a plurality of sub-lattices, where each sub-lattice includes a first number of points;
The fitting subunit is used for carrying out surface fitting by utilizing the points in each sub-lattice to obtain a plurality of second curved surfaces;
and the splicing subunit is used for splicing the plurality of second curved surfaces to obtain a first curved surface.
Optionally, the apparatus further includes:
The third acquisition module is used for acquiring a second detection image when the flexible display screen displays black and white checkered pictures, wherein the black and white checkered pictures comprise a plurality of checkered patterns distributed in an array, and one checkered pattern in the black and white checkered pictures corresponds to a first number of points in the dot matrix pictures;
a fourth obtaining module, configured to obtain a side edge of a checkerboard in the second detection image, and compare a curved edge of the second curved surface with a corresponding side edge of the checkerboard;
The reduction module includes:
And the reduction unit is used for reducing the coordinate parameters of the points in the first detection image and the distance parameters between the points under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition.
Optionally, the number of dots in the dot matrix picture corresponding to a checkerboard in the black-white checkerboard picture is at least 9.
The mura processing device of the flexible display screen provided by the embodiment of the present application can implement each process implemented by the method embodiments of fig. 1 to 6, and in order to avoid repetition, a detailed description is omitted here.
While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present invention, and it is intended to cover the scope of the invention as defined in the appended claims.
Claims (10)
1. A mura processing method of a flexible display screen, comprising:
Acquiring a mura detection image of the flexible display screen;
Acquiring a first detection image when the flexible display screen displays a dot matrix picture, wherein the dot matrix picture comprises a plurality of dots distributed in an array;
fitting by utilizing points in the first detection image to obtain a first curved surface;
restoring the first curved surface into a first plane according to the coordinate parameters of points in the first detection image and the distance parameters between the points to obtain the mapping relation between the first detection image and the first plane;
And restoring the mura detection image of the flexible display screen according to the mapping relation to obtain mura information of the flexible display screen.
2. The method of claim 1, wherein said fitting a first curved surface using points in the first detected image comprises:
Acquiring the coordinate parameters of each point in the dot matrix picture and the first detection image and the distance parameters between each point to obtain the corresponding relation between each point in the dot matrix picture and the first detection image;
And fitting the points in the first detection image according to the corresponding relation to obtain a first curved surface.
3. The method of claim 2, wherein fitting the points in the first detected image according to the correspondence relationship to obtain a first curved surface includes:
dividing points in the first detection image into a plurality of sub-lattices, wherein each sub-lattice comprises a first number of points;
performing surface fitting by utilizing the points in each sub-lattice to obtain a plurality of second curved surfaces;
And splicing the second curved surfaces to obtain a first curved surface.
4. A method according to claim 3, wherein before the restoring the first curved surface to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points, the method further comprises:
Obtaining a second detection image when the flexible display screen displays black and white checkered pictures, wherein the black and white checkered pictures comprise a plurality of checkered pictures distributed in an array, and one checkered picture in the black and white checkered pictures corresponds to a first number of points in the dot matrix pictures;
Acquiring the side edges of the checkerboard in the second detection image, and comparing the curved edges of the second curved surface with the corresponding side edges of the checkerboard;
The restoring the first curved surface to the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points includes:
and under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition, restoring the coordinate parameters of the points in the first detection image and the distance parameters between the points.
5. The method of claim 4, wherein the number of dots in the dot matrix picture corresponding to a checkerboard in the black and white checkerboard picture is at least 9.
6. A mura processing apparatus of a flexible display screen, comprising:
the first acquisition module is used for acquiring a mura detection image of the flexible display screen;
The second acquisition module is used for acquiring a first detection image when the flexible display screen displays a dot matrix picture, wherein the dot matrix picture comprises a plurality of dots distributed in an array;
The fitting module is used for fitting by utilizing points in the first detection image to obtain a first curved surface;
The mapping module is used for restoring the first curved surface to a first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points to obtain the mapping relation between the first detection image and the first plane;
And the restoring module is used for restoring the mura detection image of the flexible display screen according to the mapping relation to obtain mura information of the flexible display screen.
7. The apparatus of claim 6, wherein the fitting module comprises:
The corresponding relation acquisition unit is used for acquiring the coordinate parameters of each point in the dot matrix picture and the first detection image and the distance parameters between each point to obtain the corresponding relation between each point in the dot matrix picture and the first detection image;
and the fitting unit is used for fitting the points in the first detection image according to the corresponding relation to obtain a first curved surface.
8. The apparatus of claim 7, wherein the fitting unit comprises:
A dividing subunit, configured to divide points in the first detection image into a plurality of sub-lattices, where each sub-lattice includes a first number of points;
The fitting subunit is used for carrying out surface fitting by utilizing the points in each sub-lattice to obtain a plurality of second curved surfaces;
and the splicing subunit is used for splicing the plurality of second curved surfaces to obtain a first curved surface.
9. The apparatus of claim 8, wherein the apparatus further comprises:
The third acquisition module is used for acquiring a second detection image when the flexible display screen displays black and white checkered pictures, wherein the black and white checkered pictures comprise a plurality of checkered patterns distributed in an array, and one checkered pattern in the black and white checkered pictures corresponds to a first number of points in the dot matrix pictures;
a fourth obtaining module, configured to obtain a side edge of a checkerboard in the second detection image, and compare a curved edge of the second curved surface with a corresponding side edge of the checkerboard;
The reduction module includes:
And the reduction unit is used for reducing the coordinate parameters of the points in the first detection image and the distance parameters between the points under the condition that the comparison result of the curved edge of the second curved surface and the side edge of the black-white checkerboard meets the preset condition.
10. The apparatus of claim 9, wherein the number of dots in the dot matrix picture corresponding to one of the black and white checkerboard pictures is at least 9.
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