CN113160043A - 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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- CN113160043A CN113160043A CN202110556801.6A CN202110556801A CN113160043A CN 113160043 A CN113160043 A CN 113160043A CN 202110556801 A CN202110556801 A CN 202110556801A CN 113160043 A CN113160043 A CN 113160043A
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- 238000001514 detection method Methods 0.000 claims abstract description 119
- 239000011159 matrix material Substances 0.000 claims abstract description 56
- 238000013507 mapping Methods 0.000 claims abstract description 24
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30148—Semiconductor; IC; Wafer
Abstract
The invention provides a mura processing method and 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 array distributed points; fitting 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 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 restoring the mura detection image of the flexible display screen according to the mapping relation to obtain the mura information of the flexible display screen. According to the processing method provided by the embodiment of the invention, the mura information of the flexible display screen can be restored to the greatest extent, the accuracy in 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 an OLED (organic light-Emitting Diode) product, due to factors such as an organic light-Emitting material and a manufacturing process, the OLED product inevitably has various mura, i.e., uneven brightness display, and the mura can be compensated by adopting a demura (optical compensation) method. The improvement effect of demura on image quality is very obvious, but if the processing is not good, a negative effect is caused, wherein the precision of mura information extraction is particularly important.
When acquiring the mura information, in the conventional demura photographing, only four corners of the display area are usually selected to generate the 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, the flexible display module is usually thinner, and the flexible display screen has the problems of warping, deformation and the like inevitably, when the flexible display screen is placed on a station for demura photographing, the warping and the like inevitably exist, and finally, the deformation reflected on the edge of the display area is very large, so that the demura algorithm cannot process the images, the photographing precision and the extraction precision of mura information are influenced, and finally, the brightness compensation is deviated.
Disclosure of Invention
In view of this, the present invention provides a mura processing method and apparatus for a flexible display screen, which can solve the problem in the prior art that the precision of extracted mura information is reduced due to the flexible display screen having warpage, deformation and the like, and finally the brightness compensation is deviated.
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, where the method includes:
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 array distributed points;
fitting 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 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 restoring the mura detection image of the flexible display screen according to the mapping relation to obtain the mura information of the flexible display screen.
Optionally, the obtaining a first curved surface by using point fitting in the first detection image includes:
acquiring coordinate parameters of each point in the dot matrix picture and the first detection image and distance parameters between each point to obtain a corresponding relation between the dot matrix picture and each point in 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, fitting the points in the first detection image according to the corresponding 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 using the points in each sub-lattice to obtain a plurality of second curved surfaces;
and splicing the plurality of 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:
acquiring a second detection image when the flexible display screen displays a black and white checkerboard picture, wherein the black and white checkerboard picture comprises a plurality of checkerboards which are distributed in an array manner, and one checkerboard in the black and white checkerboard picture corresponds to a first number of points in the dot matrix picture;
acquiring the side edge of the checkerboard in the second detection image, and comparing the curved edge of the second curved surface with the corresponding side edge of the checkerboard;
the restoring the first curved surface into the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points comprises:
and restoring 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 the dots in the dot matrix picture corresponding to one checkerboard in the black and white checkerboard picture is at least 9.
The embodiment of the second aspect of the invention also provides a mura processing device of a flexible display screen, which comprises:
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 array distributed points;
the fitting module is used for fitting points in the first detection image to obtain a first curved surface;
the mapping module is used for restoring the first curved surface into 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 the mura information of the flexible display screen.
Optionally, the fitting module includes:
a corresponding relation obtaining unit, configured to obtain coordinate parameters of each point in the dot matrix picture and the first detection image and distance parameters between each point, and obtain a 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 the 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 performing surface fitting by using 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 comprises:
a third obtaining module, configured to obtain a second detection image when the flexible display screen displays a black-and-white checkerboard picture, where the black-and-white checkerboard picture includes a plurality of checkerboards distributed in an array, and one checkerboard in the black-and-white checkerboard picture corresponds to a first number of points in the dot matrix picture;
a fourth obtaining module, configured to obtain a side edge of a checkerboard in the second detection image, and compare the curved edge of the second curved surface with the corresponding side edge of the checkerboard;
the reduction module comprises:
and the restoring unit is used for restoring 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 the dots in the dot matrix picture corresponding to one checkerboard in the black and 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 dot matrix picture is displayed, and the curved surface is restored to the plane, so that the accuracy of restoring the mura information of the flexible display screen can be ensured to the greatest extent, the accuracy of the flexible display screen in the subsequent compensation process 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 dot matrix 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 of a second curved surface according to an embodiment of the present invention comparing a curved edge with a side of a checkerboard;
fig. 7 is a schematic structural diagram of a mura processing apparatus of 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 clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
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. As shown in fig. 1, the mura processing method of the flexible display screen in the embodiment of the present invention includes the following steps:
step 101: acquiring a mura detection image of the flexible display screen;
in this step, can make flexible display screen shows under a plurality of grey levels, then it is right through shooting equipment flexible display screen carries out the planarization shooting, obtains many the mura detection image of flexible display screen. It should be noted that, because the flexible display screen is usually thin, the flexible display screen itself inevitably has problems of warping, deformation and the like, and when the demura photographing is performed, the flexible display screen inevitably has deformation such as warping even when placed on a workstation, so that certain deviation exists between the mura information in the obtained mura detection image of the flexible display screen and the 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 array distributed points;
please refer to fig. 2, which is a schematic diagram of a dot matrix picture according to an embodiment of the present invention. As shown in fig. 2, the dot matrix picture in the embodiment of the present invention may be a black background and a white dot, a plurality of white dots are distributed in an array, distances between any two adjacent dots are the same, and the distances may be adjusted and determined according to actual situations. When the first detection image is obtained, the flexible display screen can display the dot matrix picture in a full screen mode, and then planarization shooting is carried out on the flexible display screen through shooting equipment, so that 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 several points in the first detected image.
Step 103: fitting points in the first detection image to obtain a first curved surface;
optionally, surface fitting may be performed on all points (discrete points) in the first detection image to obtain a first curved surface, where the first curved surface represents an actual spatial shape of the flexible display screen; of course, each preset number of points (discrete points) in the first detection image may be used to perform fitting to obtain a segmented small-area curved surface, and then the segmented small-area curved surface is spliced to obtain a complete first curved surface.
Step 104: restoring the first curved surface into 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;
due to the deformation of the flexible display screen, the coordinates of the points in the first detection image obtained by shooting will deviate to a certain extent, and deviate from the coordinates of the points in the dot matrix picture, and the distances between the points will change and are not equidistant any more, so that the first curved surface can be restored to a first plane corresponding to the flexible display screen without deformation by restoring the coordinate parameters of the points and the distance parameters between the points in the first detection image, and then the mapping relationship between the first detection image and the first plane can be obtained, that is, the mapping relationship 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 the mura information of the flexible display screen.
Because the mapping relation represents 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 deformed flexible display screen displays the screen and the image shot when the flexible display screen does not deform, the mura detection image of the flexible display screen can be restored by using the mapping relation after the mapping relation is obtained, and the mura information of the flexible display screen is obtained, wherein the obtained mura information is the real mura information of the flexible display screen and is not interfered by the deformation of the flexible display screen, and therefore, the accuracy of the mura information obtained by the method in the embodiment of the invention in the mura compensation and removal process can be ensured.
According to the processing method provided by the embodiment of the invention, the mura information of the flexible display screen can be restored to the greatest extent, the accuracy in subsequent compensation is ensured, and the display quality of the flexible display screen is improved.
In some embodiments of the present invention, the fitting points in the first detected image to obtain a first curved surface includes:
acquiring coordinate parameters of each point in the dot matrix picture and the first detection image and distance parameters between each point to obtain a corresponding relation between the dot matrix picture and each point in 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, and the coordinate parameters of each point in the first detection image and the distance parameters between each point may be obtained first, due to the deformation of the flexible display screen, the coordinates of the points in the first detection image obtained by shooting will have a certain offset, and will have a deviation from the coordinates of the points in the dot matrix picture, and the distances between the points will also change and will not be equidistant any more, and the corresponding relationship between the dot matrix picture and each point in the first detection image reflects the deformation condition of the flexible display screen, so according to the corresponding relationship, the points in the first detection image can be subjected to the curved surface fitting to obtain the first curved surface.
In other embodiments of the present invention, the fitting the points in the first detected image according to the corresponding 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 using the points in each sub-lattice to obtain a plurality of second curved surfaces;
and splicing the plurality of second curved surfaces to obtain a first curved surface.
Optionally, when fitting the points in the first detection image, considering the operation data amount 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, according to the above correspondence, surface fitting may be performed only using the points in the same sub-lattice to obtain a second surface, and then a plurality of sub-lattices obtain a plurality of second surfaces, and then a complete first surface may be obtained by splicing the plurality of second surfaces, so that the operation amount and the operation difficulty when surface fitting may be reduced.
In other embodiments of the present invention, before reducing the first curved surface to the first plane according to the coordinate parameters of the points in the first detected image and the distance parameters between the points, the method further includes:
acquiring a second detection image when the flexible display screen displays a black and white checkerboard picture, wherein the black and white checkerboard picture comprises a plurality of checkerboards which are distributed in an array manner, and one checkerboard in the black and white checkerboard picture corresponds to a first number of points in the dot matrix picture;
acquiring the side edge of the checkerboard in the second detection image, and comparing the curved edge of the second curved surface with the corresponding side edge of the checkerboard;
the restoring the first curved surface into the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points comprises:
and restoring 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.
That is to say, before the first curved surface is restored to the first plane, it needs to be determined whether the fitted first curved surface is accurate, and if the fitted first curved surface has a large error, the finally restored mura information may be inaccurate.
Referring to fig. 3 to 6, 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 dot matrix 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-dot matrix in a first detection image according to an embodiment of the present invention, and fig. 6 is a schematic diagram of a comparison between a curved edge of a second curved surface and a side edge of a checkerboard according to an embodiment of the present invention. In the embodiment of the present invention, optionally, a second detection image when the flexible display screen displays a black-and-white checkerboard picture is obtained, where the black-and-white checkerboard picture includes a plurality of checkerboards distributed in an array, the black checkerboards and the white checkerboards are alternately arranged, the checkerboards are square, one checkerboard in the black-and-white checkerboard picture corresponds to a first number of dots in the dot matrix picture, when the black-and-white checkerboard picture and the dot matrix picture are overlapped, one checkerboard includes the first number of dots, and the dots in the first number of dots (i.e., in one sub-dot matrix), the dots on four corners are located at four vertices of the checkerboard. As shown in fig. 4, taking the first number 9 as an example, four points of four corners of the 9 points fall on four vertices of the checkerboard, another four points fall on the middle points of four sides of the checkerboard, and the remaining point falls on the center point of the checkerboard.
When the second detection image is obtained, the flexible display screen can display black and white checkerboard pictures in a full screen mode, and then the flexible display screen is subjected to planar shooting through shooting equipment, so that the second detection image when the flexible display screen displays the black and white checkerboard pictures can be obtained. It can be known that there are also a plurality of checkerboards 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 will deviate from the checkerboard in the black-and-white checkerboard picture.
After the second detection image is obtained, the side edges of the checkerboards 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, it should be noted that the second curved surface and the checkerboards which are compared have a corresponding relationship, that is, the second curved surface and the checkerboards correspond to the same position on the flexible display screen.
In the embodiment of the present invention, the coordinate parameters of the points in the first detected image and the distance parameters between the points may be restored when the comparison result between the curved edge of the second curved surface and the side edge of the black-and-white checkerboard satisfies the preset condition. That is, by determining whether the error between the curved edge of the second curved surface and the side of the black-and-white checkerboard is within a preset error range, for example, calculating the distance error between the corresponding curved edge and the point on the side, the first curved surface is restored only when 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 restoration of the first curved surface is carried out or not is determined by judging whether the result of the curved surface fitting meets the requirement or not, the fitting effect of the first curved surface can be ensured, and the accuracy of the mura information obtained by the subsequent restoration is ensured to the greatest extent.
In some embodiments of the present invention, the number of the points in the dot matrix picture corresponding to one checkerboard in the black and white checkerboard picture is at least 9, so as to ensure the number of discrete points during surface fitting, and further ensure the surface fitting effect. Optionally, it can be known that, generally, the larger the number of the points in the dot matrix picture corresponding to one checkerboard in the black and white checkerboard picture is, the more the discrete points that can be used for surface fitting are, and the better the surface fitting effect is.
According to the processing method provided by the embodiment of the invention, the dot matrix picture and the black and white checkerboard picture are respectively displayed, and the curved surface is restored to be a plane, so that the accuracy of restoring the mura information of the flexible display screen can be ensured to the greatest extent, the accuracy of subsequently compensating the flexible display screen 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 main body may be a mura processing apparatus for a flexible display screen, or a control module in the mura processing apparatus for a flexible display screen, for executing the mura processing method for a flexible display screen. The embodiment of the invention takes the mura processing method of the flexible display screen executed by the mura processing device of the flexible display screen as an example, and the mura processing device of the flexible display screen provided by the embodiment of the invention is explained.
Fig. 7 is a schematic structural diagram of a mura processing apparatus of a flexible display screen according to an embodiment of the present invention. As shown in fig. 7, in the embodiment of the present invention, the apparatus 70 includes:
a first obtaining module 71, configured to obtain 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 fit points in the first detection image to obtain a first curved surface;
a mapping module 74, 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, the mura information of the flexible display screen can be restored to the greatest extent, the accuracy in subsequent compensation is ensured, and the display quality of the flexible display screen is improved.
Optionally, the fitting module includes:
a corresponding relation obtaining unit, configured to obtain coordinate parameters of each point in the dot matrix picture and the first detection image and distance parameters between each point, and obtain a 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 the 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 performing surface fitting by using 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 comprises:
a third obtaining module, configured to obtain a second detection image when the flexible display screen displays a black-and-white checkerboard picture, where the black-and-white checkerboard picture includes a plurality of checkerboards distributed in an array, and one checkerboard in the black-and-white checkerboard picture corresponds to a first number of points in the dot matrix picture;
a fourth obtaining module, configured to obtain a side edge of a checkerboard in the second detection image, and compare the curved edge of the second curved surface with the corresponding side edge of the checkerboard;
the reduction module comprises:
and the restoring unit is used for restoring 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 the dots in the dot matrix picture corresponding to one checkerboard in the black and white checkerboard picture is at least 9.
The mura processing apparatus for a flexible display screen provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 1 to 6, and is not described here again to avoid repetition.
While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and it is intended that all such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. A mura processing method of a flexible display screen is characterized by comprising 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 array distributed points;
fitting 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 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 restoring the mura detection image of the flexible display screen according to the mapping relation to obtain the mura information of the flexible display screen.
2. The method of claim 1, wherein said using a point fit in the first detected image to obtain a first surface comprises:
acquiring coordinate parameters of each point in the dot matrix picture and the first detection image and distance parameters between each point to obtain a corresponding relation between the dot matrix picture and each point in 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 to obtain a first curved surface comprises:
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 using the points in each sub-lattice to obtain a plurality of second curved surfaces;
and splicing the plurality of second curved surfaces to obtain a first curved surface.
4. The method according to claim 3, wherein before reducing the first curved surface to the first plane according to the coordinate parameters of the points in the first detected image and the distance parameters between the points, the method further comprises:
acquiring a second detection image when the flexible display screen displays a black and white checkerboard picture, wherein the black and white checkerboard picture comprises a plurality of checkerboards which are distributed in an array manner, and one checkerboard in the black and white checkerboard picture corresponds to a first number of points in the dot matrix picture;
acquiring the side edge of the checkerboard in the second detection image, and comparing the curved edge of the second curved surface with the corresponding side edge of the checkerboard;
the restoring the first curved surface into the first plane according to the coordinate parameters of the points in the first detection image and the distance parameters between the points comprises:
and restoring 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.
5. The method according to claim 4, wherein the number of points 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 array distributed points;
the fitting module is used for fitting points in the first detection image to obtain a first curved surface;
the mapping module is used for restoring the first curved surface into 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 the mura information of the flexible display screen.
7. The apparatus of claim 6, wherein the fitting module comprises:
a corresponding relation obtaining unit, configured to obtain coordinate parameters of each point in the dot matrix picture and the first detection image and distance parameters between each point, and obtain a 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 the 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 performing surface fitting by using 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, further comprising:
a third obtaining module, configured to obtain a second detection image when the flexible display screen displays a black-and-white checkerboard picture, where the black-and-white checkerboard picture includes a plurality of checkerboards distributed in an array, and one checkerboard in the black-and-white checkerboard picture corresponds to a first number of points in the dot matrix picture;
a fourth obtaining module, configured to obtain a side edge of a checkerboard in the second detection image, and compare the curved edge of the second curved surface with the corresponding side edge of the checkerboard;
the reduction module comprises:
and the restoring unit is used for restoring 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 according to claim 9, wherein the number of the dots in the dot matrix picture corresponding to a checkerboard in the black and white checkerboard picture is at least 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413788A (en) * | 2022-01-21 | 2022-04-29 | 武汉惟景三维科技有限公司 | Part surface pattern detection method based on binocular vision and reverse model reconstruction |
| CN115100078A (en) * | 2022-07-25 | 2022-09-23 | 湖南大学 | Method for correcting and filling dot matrix coordinates in curved screen image and related device |
| WO2023221290A1 (en) * | 2022-05-19 | 2023-11-23 | 苏州华兴源创科技股份有限公司 | Pixel positioning method, apparatus, and device for curved screen |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413788A (en) * | 2022-01-21 | 2022-04-29 | 武汉惟景三维科技有限公司 | Part surface pattern detection method based on binocular vision and reverse model reconstruction |
| CN114413788B (en) * | 2022-01-21 | 2024-04-09 | 武汉惟景三维科技有限公司 | Part surface pattern detection method based on binocular vision and reverse model reconstruction |
| WO2023221290A1 (en) * | 2022-05-19 | 2023-11-23 | 苏州华兴源创科技股份有限公司 | Pixel positioning method, apparatus, and device for curved screen |
| CN115100078A (en) * | 2022-07-25 | 2022-09-23 | 湖南大学 | Method for correcting and filling dot matrix coordinates in curved screen image and related device |
| CN115100078B (en) * | 2022-07-25 | 2022-12-13 | 湖南大学 | Method and related device for correcting and filling dot matrix coordinates in curved screen image |
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