CN116386520A - Spherical inner display screen correction method and device, electronic equipment and storage medium - Google Patents
Spherical inner display screen correction method and device, electronic equipment and storage medium Download PDFInfo
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- 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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Abstract
The invention provides a correction method and device for a spherical inner display screen, electronic equipment and a storage medium, belongs to the control of an indication device for displaying variable information by a static method, and particularly relates to the field of display screen correction. The correction method solves the problems that the correction method in the prior art is affected by different shapes of single boxes, so that the universality is poor, the problem of splicing for multiple times is introduced, the correction effect of the whole screen is affected, and the correction efficiency is low due to time and labor waste in the correction process. According to the correction method of the spherical inner display screen, normalization operation is carried out on the reflection image of any one hemisphere and the direct shot image of any one hemisphere, and then splicing and fusion are carried out. The correction device is mainly used for correcting the spherical inner display screen.
Description
Technical Field
The invention relates to control of an indication device for displaying variable information by a static method, in particular to the field of display screen correction.
Background
Along with the increasing personalized requirements of people on LED display screens, many places such as scientific museums, exhibition halls, art halls and the like adopt a spherical inner display screen, and full-view immersive viewing experience is provided for audiences.
Those skilled in the art will appreciate that the LED display screen is formed by splicing a plurality of LED display modules (or called boxes), and a plurality of LED lamp chips arranged in an array are integrated on the LED display modules (or the boxes), and the LED lamp chips are also called lamp points, and the lamp points are used for emitting light. The whole screen of the traditional LED display screen is in a regular rectangular shape, and correspondingly, the module of the traditional LED display screen is also in a rectangular shape; the spherical inner display screen is quite different, so that the screen of the spherical inner display screen presents a non-rectangular spherical shape, and the module (or box body) for splicing the spherical inner display screen is not rectangular any more, is generally trapezoid with different sizes, and can be in other shapes.
The LED display screen is formed by splicing a plurality of modules (or boxes), so that the uniformity of the brightness and the color of the light emitted among the modules (or boxes) can influence the display effect of the whole display screen; meanwhile, a plurality of light points are integrated on the module (or the box body), and the uniformity of the brightness and the color intensity of light emitted among the light points can also influence the display effect of a single module (or the box body), so that the display effect of the whole display screen is influenced. Therefore, in order to ensure the display effect of the LED display screen, the brightness correction needs to be performed on each lamp point in the LED display screen.
Aiming at the traditional LED display screen, the whole screen and the module (or the box body) are rectangular in specification, and the corresponding correction method is quite mature; however, for the spherical inner display screen, because the spherical inner display screen and the module (or the box) forming the spherical inner display screen have no uniform specification, have various different shapes or sizes, and the traditional correction method is not applicable. How to correct the spherical inner display screen simply and efficiently becomes a difficulty in the industry.
The existing correction method for the spherical inner display screen generally adopts a method of singly correcting a single module and then splicing and fusing, and the general correction steps are as follows:
firstly, decomposing the whole screen into a plurality of single modules (or boxes); then, correcting each single module (or box) to obtain a single module (or box) correction coefficient; then, each single module (or box) is spliced with each other according to the space position of the single module (or box) in the spherical inner display screen; and finally, mutually fusing the correction coefficients of the single modules (or the box bodies).
The existing method for correcting single module independently and then splicing and fusing is adopted to correct the spherical inner display screen, and the following defects exist:
1. when correcting a single module, a correction method is required to be designed for single modules (or boxes) with different shapes, each correction method is required to limit the shape of each single module (or box) after the whole screen is decomposed, and the correction method is affected by the different shapes of the single modules (or boxes) to cause poor universality.
2. After correcting the single modules, all the single modules (or the box bodies) are required to be spliced again to form the whole screen, and the problem of multiple splicing is introduced at the moment, namely, a splicing gap is generated when any two single modules (or the box bodies) are mutually spliced, and the final correcting effect of the whole screen is influenced.
3. The whole screen is decomposed into a single module (or a box) for correction, and the correction efficiency is low due to the fact that the method is time-consuming and labor-consuming when the whole screen is spliced again.
Mostly, manual field correction is performed, namely, a mode of manually adjusting the brightness of each lamp point by observing the display difference of the lamp points by naked eyes is adopted; and once a certain area of the special-shaped LED screen is damaged, the replaced display screen module needs to be reorganized by hands to adjust brightness again for correction. The special-shaped LED screen is corrected manually, the whole process is complex, time and labor are consumed, the efficiency is low, the universality is poor, the correction accuracy is poor, the subtle differences on the display are difficult to identify, and the corrected visual effect is often unsatisfactory.
Disclosure of Invention
The invention provides a correction method, a correction device, electronic equipment and a storage medium for a spherical inner display screen, which solve the problems that the correction method in the prior art is affected by different shapes of single boxes, so that the universality is poor, the correction effect of the whole screen is affected by the problem of multiple splicing, and the correction efficiency is low due to time and labor waste in the correction process.
The invention relates to a correction method of a spherical inner display screen, which comprises the following steps:
the method specifically comprises the following steps:
Further, a preferred embodiment is provided, wherein the arbitrary hemisphere image is specifically as follows:
any one hemispherical image is obtained by adopting a spherical inner display screen image acquisition method;
the reflection image of any one hemisphere comprises a large circular area represented by the whole of the any one hemisphere; the large circular area is provided with n lamp point circular rings from the center to the edge, wherein the 1 st to m lamp point circular rings are covered by the shielding object area, m and n are positive integers greater than 1 and m epsilon (1, n);
the direct shot image of any one hemisphere comprises a small circular area presented by a part of the hemisphere of the any one hemisphere; and k lamp point circular rings are distributed in the small circular area from the center to the edge, wherein k is a positive integer greater than 1 and k is E (m, n).
Further, a preferred embodiment of the method for acquiring an image of the spherical inner display screen is provided, wherein any one hemisphere image of the spherical inner display screen is acquired by a refraction-reflection image acquisition system;
the refraction and reflection image acquisition system comprises a parabolic reflector and a CCD camera; the parabolic reflector is used for reflecting the light signals sent by the spherical inner display screen to the image acquisition end of the CCD camera.
Further, a preferred embodiment of the method for acquiring an image of the spherical inner display screen specifically includes:
s1, dividing the spherical inner side display screen into two hemispheres according to a plane passing through the center of the sphere;
s2, collecting a reflection image of any hemisphere, wherein the reflection image is specifically as follows:
fixing the CCD camera at the inner sphere center of the spherical inner display screen, and reflecting an image displayed by any one hemisphere to an image acquisition end of the CCD camera by adopting the parabolic reflector;
the CCD camera obtains a reflection image of any hemisphere;
s3, collecting a direct shot image of any hemisphere, wherein the direct shot image is specifically as follows:
removing the parabolic reflector, fixing the CCD camera at the inner sphere center position of the spherical inner display screen, and enabling the image acquisition end of the CCD camera to be opposite to the pole of any hemisphere;
the CCD camera directly receives the light signal emitted by any one hemisphere to obtain a direct shot image of the any one hemisphere;
s4, collecting the reflection images and the direct shooting images of the two hemispheres forming the spherical inner side display screen, and completing image collection of the whole spherical inner side display screen.
Further, a preferred embodiment is provided, and the step 1 specifically includes:
step 1.1, removing image noise in the reflection image of any hemisphere, wherein the method specifically comprises the following steps:
in the reflection image of any hemisphere, taking an area except the large circular area as the background area of the reflection image;
obtaining a pixel gray value average value of the background area of the reflection image as image noise s1 of the reflection image;
subtracting image noise s1 of the reflected image from the gray value of any pixel in the reflected image of any hemisphere to obtain the gray value of any pixel after denoising; if the gray value after denoising of any one pixel is smaller than 0, setting the gray value after denoising of any one pixel to be 0;
step 1.2, removing image noise in the direct shot image of any hemisphere, wherein the method specifically comprises the following steps:
in the direct shot image of any hemisphere, taking an area except the small circular area as the background area of the direct shot image;
obtaining the pixel gray average value of the background area of the straight shot image as the image noise s2 of the straight shot image;
subtracting image noise s2 of the directly shot image from the gray value of any pixel in the directly shot image of any hemisphere to obtain the gray value of any pixel after denoising; and if the gray value after denoising of any one pixel is smaller than 0, setting the gray value after denoising of any one pixel to be 0.
Further, a preferred embodiment is provided, and the step 3 specifically includes:
step 3.1, acquiring the gray value average value S1 of all pixel points in an area surrounded by m-th to k-th lamp point circular rings in the reflection image of any hemisphere;
step 3.2, acquiring the gray value average value S2 of all pixel points in an area surrounded by m-th to k-th lamp point circular rings in the direct shot image of any hemisphere;
step 3.3, obtaining a normalized coefficient K, wherein the expression is as follows: k=s2/S1;
and 3.4, multiplying the gray value of any one pixel point in the reflection image of any one hemisphere by the normalization coefficient K to obtain the normalized gray value of the any one pixel point.
Further, a preferred embodiment is provided, and the step 4 specifically includes:
step 4.1, obtaining an image of an area surrounded by the m-th to n-th lamp point circular rings in the reflection image of any hemisphere, and taking the image as an outer ring light point image;
step 4.2, obtaining images of areas surrounded by the 1 st to m lamp point circular rings in the direct shot image of any hemisphere, and taking the images as inner circle light point images;
and 4.3, fusing the coordinates and brightness information of each pixel point in the outer ring light spot image and the inner ring light spot image to obtain a fused image of any hemisphere.
The invention also provides a correcting device for the spherical inner display screen, which has the following technical scheme:
the device specifically comprises:
and a denoising module: the method comprises the steps of removing image noise in any one hemispherical image according to the pre-acquired hemispherical image of the spherical inner side display screen; the any one hemisphere image comprises a reflection image of any one hemisphere and a direct shot image of any one hemisphere;
and a positioning module: the method comprises the steps of positioning a lamp point on any one hemispherical image to obtain a lamp point coordinate;
the normalization module is used for performing normalization operation on the reflected image of any one hemisphere and the direct shot image of any one hemisphere;
and a fusion module: the method comprises the steps of performing stitching fusion on the reflection image of any hemisphere after normalization operation and the direct shot image of any hemisphere after normalization operation to obtain a fusion image of any hemisphere;
and a correction module: the method comprises the steps of performing brightness correction on any hemisphere according to a fusion image of the any hemisphere; and after the brightness correction is carried out on the two hemispheres forming the spherical inner display screen, the brightness correction of the spherical inner display screen is finished.
The invention also provides an electronic device, which has the following technical scheme:
an electronic device, comprising: a processor and a memory for storing executable instructions of the processor, the processor configured to perform the spherical inside display screen correction method described above via execution of the executable instructions.
The invention also provides a computer storage medium, which has the following technical scheme:
a computer storage medium having a computer program stored therein, which when run, performs the spherical inside display screen correction method described above.
The invention has the following beneficial effects:
according to the spherical inner side display screen correction method, the two hemispherical patterns acquired in advance are fused, and then the correction process is carried out respectively, so that the correction method is not influenced by the shape of a single LED box body, and is high in universality; the correction process is automatically realized without complex operation, and the correction method is convenient and quick and has high efficiency; and the correction process does not need to carry out repeated disassembly and assembly on the whole screen, thereby ensuring the correction effect of the whole screen and having high correction accuracy.
The spherical inner display screen correction method, the spherical inner display screen correction device, the electronic equipment and the storage medium are suitable for correcting the spherical inner display screen.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a catadioptric image acquisition system in a third embodiment of the present invention;
fig. 2 is a schematic diagram of a method for acquiring an image of a spherical inner display screen according to a third embodiment of the present invention;
FIG. 3 is a graph showing the effect of a collected reflection image of any hemisphere in the first embodiment of the present invention;
fig. 4 is an effect diagram of a captured direct shot image of any hemisphere in a first embodiment of the present invention;
in the above figures: 1. a parabolic mirror; 2. a CCD camera; 3. a catadioptric image acquisition system; 4. a spherical inside display screen; 5. and (5) a lamp point.
Detailed Description
In order to make the technical solution and the advantages of the present invention more clear, the detailed description of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In a first embodiment, a method for correcting a spherical inner display screen is provided in this embodiment with reference to fig. 1 to 4, and the specific implementation contents are as follows:
the method specifically comprises the following steps:
In this embodiment, the removing of the image noise in any one of the hemispherical images can maximally preserve the original detail information in the image. Because the collected photos are output in a rectangular format, black areas around the upper, lower, left and right sides in the photos are not shot scenes in the spherical screen, and image noise processing is needed. The detail information of the scene inside the spherical screen is reserved in the image obtained after the image noise, and meanwhile, the interference of irrelevant information is reduced.
In this embodiment, the lamp point positioning is performed on the hemispherical image to obtain the lamp point coordinates, which belong to the prior art and are not described herein.
In the second embodiment, the present embodiment is described with reference to fig. 1 to 4, and the specific implementation content of the method for correcting a spherical inside display screen according to the first embodiment is as follows:
the arbitrary hemisphere image is specifically as follows:
any one hemispherical image is obtained by adopting a spherical inner display screen image acquisition method;
the reflection image of any one hemisphere comprises a large circular area represented by the whole of the any one hemisphere; the large circular area is provided with n lamp point circular rings from the center to the edge, wherein the 1 st to m lamp point circular rings are covered by the shielding object area, m and n are positive integers greater than 1 and m epsilon (1, n);
the direct shot image of any one hemisphere comprises a small circular area presented by a part of the hemisphere of the any one hemisphere; and k lamp point circular rings are distributed in the small circular area from the center to the edge, wherein k is a positive integer greater than 1 and k is E (m, n).
In this embodiment, since the light spots are uniformly arranged on the spherical inner display screen, a plurality of annular light bands (light spot rings) uniformly arranged with the poles of the actual hemisphere (i.e., the centers of the hemispheric images) as the center can be obtained in the collected hemispheric images.
In a third embodiment, the present embodiment is described with reference to fig. 1 to 4, and the present embodiment is further limited to the spherical inside display screen image acquisition method in the spherical inside display screen correction method described in the second embodiment, and specific implementation contents are as follows:
according to the spherical inner side display screen image acquisition method, any one hemispherical image of the spherical inner side display screen 4 is acquired through the catadioptric image acquisition system 3;
the refraction and reflection image acquisition system 3 comprises a parabolic reflector 1 and a CCD camera 2; the parabolic mirror is used for reflecting the light signal emitted by the spherical inner display screen 4 to the image acquisition end of the CCD camera 2.
In this embodiment, the concave paraboloid of the parabolic reflector 1 is formed by rotating a parabola around its symmetry axis, which is called a paraboloid of revolution.
As shown in fig. 1, in three-dimensional space, the curved surface equation of the paraboloid of revolution can be expressed as:
wherein x, y and z respectively represent coordinate axes in the three-dimensional space in fig. 1, and p is the focal length of the paraboloid of revolution in fig. 1; o is the origin of the coordinate axes in the three-dimensional space in fig. 1.
In a fourth embodiment, the present embodiment is described with reference to fig. 1 to 4, and the method for acquiring an image of the spherical inside display screen in the method for correcting the spherical inside display screen according to the third embodiment is further limited, and specific implementation contents are as follows:
the image acquisition method of the spherical inner display screen specifically comprises the following steps:
s1, dividing the spherical inner side display screen 4 into two hemispheres according to a plane passing through the center of the sphere;
s2, collecting a reflection image of any hemisphere, wherein the reflection image is specifically as follows:
fixing the CCD camera 2 at the inner sphere center of the spherical inner display screen 4, and reflecting an image displayed by any one hemisphere to an image acquisition end of the CCD camera 2 by adopting the parabolic reflector 1;
the CCD camera 2 obtains a reflected image of the any hemisphere;
s3, collecting a direct shot image of any hemisphere, wherein the direct shot image is specifically as follows:
removing the parabolic reflector 1, fixing the CCD camera 2 at the inner sphere center position of the spherical inner display screen 4, and enabling the image acquisition end of the CCD camera 2 to face the pole of any hemisphere;
the CCD camera 2 directly receives the light signal emitted by any one hemisphere to obtain a direct shot image of the any one hemisphere;
s4, collecting the reflection images and the direct shooting images of the two hemispheres forming the spherical inner side display screen 4, and completing image collection of the whole spherical inner side display screen 4.
In this embodiment, the parabolic mirror 1 is used to reflect an image displayed by any one hemisphere to the image capturing end of the CCD camera 2, specifically: the axis of the parabolic reflector 1 coincides with the axis of the pole of any one hemisphere, and the reflecting surface of the parabolic reflector 1 faces the pole of any one hemisphere; illuminating any one hemisphere, which emits light and is reflected by the parabolic reflector 1; the CCD camera 2 receives the light signal reflected by the parabolic mirror 1, i.e., the reflected image of any one hemisphere.
In this embodiment, the image capturing end of the CCD camera 2 is opposite to the pole of any hemisphere, specifically: the axis of the CCD camera 2 coincides with the axis of any hemisphere passing through the pole of the hemisphere, and the lens direction of the CCD camera 2 faces the pole of any hemisphere. The CCD camera 2 directly receives the light signal emitted by the any one hemisphere, and obtains a direct shot image of the any one hemisphere, specifically: and (3) lighting any one hemisphere, wherein the any one hemisphere emits light, and the CCD camera 2 directly receives the light, so as to obtain a direct shot image of the any one hemisphere.
In this embodiment, the parabolic reflector 1 is used when the reflected image is collected, and a part of light is blocked by the parabolic reflector 1, so that a part of rings in a plurality of uniformly arranged lamp point rings in the collected reflected image are covered by the blocking object region.
In this embodiment, when the direct-shot image is collected, the parabolic mirror 1 is removed, and since the area of the parabolic mirror 1 receiving the optical signal is larger than the image collecting end of the CCD camera 2, the hemispherical image area in all the collected direct-shot images is smaller than the hemispherical image area in the reflected image.
In a fifth embodiment, the present embodiment is further defined in step 1 in the spherical inside display screen correction method according to the fourth embodiment, and specific implementation details are as follows:
the step 1 specifically includes:
step 1.1, removing image noise in the reflection image of any hemisphere, wherein the method specifically comprises the following steps:
in the reflection image of any hemisphere, taking an area except the large circular area as the background area of the reflection image;
obtaining a pixel gray value average value of the background area of the reflection image as image noise s1 of the reflection image;
subtracting image noise s1 of the reflected image from the gray value of any pixel in the reflected image of any hemisphere to obtain the gray value of any pixel after denoising; if the gray value after denoising of any one pixel is smaller than 0, setting the gray value after denoising of any one pixel to be 0;
step 1.2, removing image noise in the direct shot image of any hemisphere, wherein the method specifically comprises the following steps:
in the direct shot image of any hemisphere, taking an area except the small circular area as the background area of the direct shot image;
obtaining the pixel gray average value of the background area of the straight shot image as the image noise s2 of the straight shot image;
subtracting image noise s2 of the directly shot image from the gray value of any pixel in the directly shot image of any hemisphere to obtain the gray value of any pixel after denoising; and if the gray value after denoising of any one pixel is smaller than 0, setting the gray value after denoising of any one pixel to be 0.
In a sixth embodiment, the present embodiment is described with reference to fig. 1 to 4, and the method for correcting a spherical inside display screen according to the fifth embodiment is further limited in step 3, and specific implementation contents are as follows:
the step 3 specifically includes:
step 3.1, acquiring the gray value average value S1 of all pixel points in an area surrounded by m-th to k-th lamp point circular rings in the reflection image of any hemisphere;
step 3.2, acquiring the gray value average value S2 of all pixel points in an area surrounded by m-th to k-th lamp point circular rings in the direct shot image of any hemisphere;
step 3.3, obtaining a normalized coefficient K, wherein the expression is as follows: k=s2/S1;
and 3.4, multiplying the gray value of any one pixel point in the reflection image of any one hemisphere by the normalization coefficient K to obtain the normalized gray value of the any one pixel point.
In this embodiment, the reflected image and the directly shot image are collected twice, once with the reflecting mirror and once without the reflecting mirror, and the camera is turned over, so that the brightness information obtained by the two collection has an error, and therefore, before the two images are fused, the brightness value needs to be normalized, so that the brightness information obtained by the two collection can be balanced.
Embodiment seven, which is described with reference to fig. 1 to 4, is a further limitation of step 4 in the spherical inside display screen correction method according to embodiment six, and the specific implementation contents are as follows:
the step 4 specifically includes:
step 4.1, obtaining an image of an area surrounded by the m-th to n-th lamp point circular rings in the reflection image of any hemisphere, and taking the image as an outer ring light point image;
step 4.2, obtaining images of areas surrounded by the 1 st to m lamp point circular rings in the direct shot image of any hemisphere, and taking the images as inner circle light point images;
and 4.3, fusing the coordinates and brightness information of each pixel point in the outer ring light spot image and the inner ring light spot image to obtain a fused image of any hemisphere.
An eighth embodiment is described with reference to fig. 1 to 4, and the embodiment provides a correction device for a spherical inner display screen, which is specifically implemented as follows:
the device specifically comprises:
and a denoising module: the method comprises the steps of removing image noise in any one hemisphere image according to the hemisphere image of a pre-acquired spherical inner display screen 4; the any one hemisphere image comprises a reflection image of any one hemisphere and a direct shot image of any one hemisphere;
and a positioning module: the method is used for positioning the lamp points 5 on any one hemispherical image to obtain lamp point coordinates;
the normalization module is used for performing normalization operation on the reflected image of any one hemisphere and the direct shot image of any one hemisphere;
and a fusion module: the method comprises the steps of performing stitching fusion on the reflection image of any hemisphere after normalization operation and the direct shot image of any hemisphere after normalization operation to obtain a fusion image of any hemisphere;
and a correction module: the method comprises the steps of performing brightness correction on any hemisphere according to a fusion image of the any hemisphere; and after the brightness correction is carried out on the two hemispheres forming the spherical inner display screen, the brightness correction of the spherical inner display screen is finished.
In this embodiment, the apparatus is used to implement the method described in embodiment one.
The technical solution provided by the present invention is described in further detail through several specific embodiments, so as to highlight the advantages and benefits of the technical solution provided by the present invention, however, the above specific embodiments are not intended to be limiting, and any reasonable modification and improvement, reasonable combination of embodiments, equivalent substitution, etc. of the present invention based on the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (10)
1. The method for correcting the spherical inner display screen is characterized by comprising the following steps of:
step 1, removing image noise in any one hemispherical image according to the pre-acquired hemispherical image of a spherical inner display screen (4); the any one hemisphere image comprises a reflection image of any one hemisphere and a direct shot image of any one hemisphere;
step 2, positioning the lamp point (5) on any one hemispherical image to obtain a lamp point coordinate;
step 3, normalizing the reflected image of any one hemisphere and the direct shot image of any one hemisphere;
step 4, splicing and fusing the reflection image of any hemisphere after normalization operation with the direct shot image of any hemisphere after normalization operation to obtain a fused image of any hemisphere;
step 5, according to the fusion image of any hemisphere, carrying out brightness and color correction on the any hemisphere; and after the brightness correction is carried out on the two hemispheres forming the spherical inner display screen, the brightness correction of the spherical inner display screen is finished.
2. The method for correcting a spherical inside display screen according to claim 1, wherein the arbitrary one hemisphere image is specifically as follows:
any one hemispherical image is obtained by adopting a spherical inner display screen image acquisition method;
the reflection image of any one hemisphere comprises a large circular area represented by the whole of the any one hemisphere; the large circular area is provided with n lamp point circular rings from the center to the edge, wherein the 1 st to m lamp point circular rings are covered by the shielding object area, m and n are positive integers greater than 1 and m epsilon (1, n);
the direct shot image of any one hemisphere comprises a small circular area presented by a part of the hemisphere of the any one hemisphere; and k lamp point circular rings are distributed in the small circular area from the center to the edge, wherein k is a positive integer greater than 1 and k is E (m, n).
3. The spherical inside display screen correction method according to claim 2, wherein:
according to the spherical inner side display screen image acquisition method, any one hemispherical image of the spherical inner side display screen (4) is acquired through a refraction and reflection image acquisition system (3);
the refraction and reflection image acquisition system (3) comprises a parabolic reflector (1) and a CCD camera (2); the parabolic reflector (1) is used for reflecting light signals sent by the spherical inner display screen (4) to an image acquisition end of the CCD camera (2).
4. A spherical inside display screen correction method according to claim 3, characterized in that the spherical inside display screen image acquisition method specifically comprises:
s1, dividing the spherical inner side display screen (4) into two hemispheres according to a plane passing through the center of the sphere;
s2, collecting a reflection image of any hemisphere, wherein the reflection image is specifically as follows:
fixing the CCD camera (2) at the inner sphere center position of the spherical inner display screen (4), and reflecting an image displayed by any one hemisphere to an image acquisition end of the CCD camera (2) by adopting the parabolic reflector (1);
the CCD camera (2) obtains a reflection image of any one hemisphere;
s3, collecting a direct shot image of any hemisphere, wherein the direct shot image is specifically as follows:
removing the parabolic reflector (1), fixing the CCD camera (2) at the inner sphere center position of the spherical inner display screen (4), and enabling the image acquisition end of the CCD camera (2) to face the pole of any hemisphere;
the CCD camera (2) directly receives the light signal emitted by any one hemisphere to obtain a direct shot image of the any one hemisphere;
s4, collecting the reflection images and the direct shooting images of the two hemispheres forming the spherical inner side display screen (4), and completing image collection of the whole spherical inner side display screen (4).
5. The method for correcting a spherical inside display screen according to claim 4, wherein the step 1 specifically comprises:
step 1.1, removing image noise in the reflection image of any hemisphere, wherein the method specifically comprises the following steps:
in the reflection image of any hemisphere, taking an area except the large circular area as the background area of the reflection image;
obtaining a pixel gray value average value of the background area of the reflection image as image noise s1 of the reflection image;
subtracting image noise s1 of the reflected image from the gray value of any pixel in the reflected image of any hemisphere to obtain the gray value of any pixel after denoising; if the gray value after denoising of any one pixel is smaller than 0, setting the gray value after denoising of any one pixel to be 0;
step 1.2, removing image noise in the direct shot image of any hemisphere, wherein the method specifically comprises the following steps:
in the direct shot image of any hemisphere, taking an area except the small circular area as the background area of the direct shot image;
obtaining the pixel gray average value of the background area of the straight shot image as the image noise s2 of the straight shot image;
subtracting image noise s2 of the directly shot image from the gray value of any pixel in the directly shot image of any hemisphere to obtain the gray value of any pixel after denoising; and if the gray value after denoising of any one pixel is smaller than 0, setting the gray value after denoising of any one pixel to be 0.
6. The method for correcting a spherical inside display screen according to claim 5, wherein the step 3 specifically comprises:
step 3.1, acquiring the gray value average value S1 of all pixel points in an area surrounded by m-th to k-th lamp point circular rings in the reflection image of any hemisphere;
step 3.2, acquiring the gray value average value S2 of all pixel points in an area surrounded by m-th to k-th lamp point circular rings in the direct shot image of any hemisphere;
step 3.3, obtaining a normalized coefficient K, wherein the expression is as follows: k=s2/S1;
and 3.4, multiplying the gray value of any one pixel point in the reflection image of any one hemisphere by the normalization coefficient K to obtain the normalized gray value of the any one pixel point.
7. The method for correcting a spherical inside display screen according to claim 6, wherein the step 4 specifically comprises:
step 4.1, obtaining an image of an area surrounded by the m-th to n-th lamp point circular rings in the reflection image of any hemisphere, and taking the image as an outer ring light point image;
step 4.2, obtaining images of areas surrounded by the 1 st to m lamp point circular rings in the direct shot image of any hemisphere, and taking the images as inner circle light point images;
and 4.3, fusing the coordinates and brightness information of each pixel point in the outer ring light spot image and the inner ring light spot image to obtain a fused image of any hemisphere.
8. The utility model provides a spherical inboard display screen correcting unit which characterized in that, the device specifically includes:
and a denoising module: the method comprises the steps of removing image noise in any one hemisphere image according to the hemisphere image of a pre-acquired spherical inner side display screen (4); the any one hemisphere image comprises a reflection image of any one hemisphere and a direct shot image of any one hemisphere;
and a positioning module: the method comprises the steps of positioning a lamp point (5) on any one hemispherical image to obtain a lamp point coordinate;
the normalization module is used for performing normalization operation on the reflected image of any one hemisphere and the direct shot image of any one hemisphere;
and a fusion module: the method comprises the steps of performing stitching fusion on the reflection image of any hemisphere after normalization operation and the direct shot image of any hemisphere after normalization operation to obtain a fusion image of any hemisphere;
and a correction module: the method comprises the steps of performing brightness correction on any hemisphere according to a fusion image of the any hemisphere; and after the brightness correction is carried out on the two hemispheres forming the spherical inner display screen, the brightness correction of the spherical inner display screen is finished.
9. An electronic device, comprising: a processor and a memory, wherein the memory is configured to store executable instructions of the processor, the processor being configured to perform the spherical inside display screen correction method of any one of claims 1-7 via execution of the executable instructions.
10. A computer storage medium, wherein a computer program is stored in the storage medium, which computer program, when run, performs the spherical inside display screen correction method of any one of claims 1-7.
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