CN111107333A - Brightness correction method, system, equipment and computer readable storage medium - Google Patents
Brightness correction method, system, equipment and computer readable storage medium Download PDFInfo
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- CN111107333A CN111107333A CN201911411079.6A CN201911411079A CN111107333A CN 111107333 A CN111107333 A CN 111107333A CN 201911411079 A CN201911411079 A CN 201911411079A CN 111107333 A CN111107333 A CN 111107333A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
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Abstract
The application discloses a brightness correction method, a system, equipment and a computer readable storage medium, which are used for determining a projection image obtained after a target projection equipment projects a detection image; carrying out region division on the projection drawing to obtain corresponding projection division regions; determining the region brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image; determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the regional brightness attenuation information; and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information. According to the method and the device, the brightness correction information of the target projection equipment can be quickly determined based on the projection division area, the brightness correction of the target projection equipment is quickly realized, and the watching image quality of the projection equipment is improved. The brightness correction system, the equipment and the computer readable storage medium provided by the application also solve the corresponding technical problems.
Description
Technical Field
The present application relates to the field of image processing technologies, and in particular, to a brightness correction method, system, device, and computer-readable storage medium.
Background
In the application process of the projection equipment, due to the optical structure of the projection, the brightness is near bright and far dark, so that the brightness of the projected picture is brightest at the middle lower part and dark at the periphery, the image quality is influenced, and particularly the short-focus projection effect is influenced.
In summary, a problem to be solved by those skilled in the art is how to improve the viewing quality of the projection device.
Disclosure of Invention
The present application is directed to a brightness correction method, which can solve the technical problem of improving the viewing quality of a projection device to a certain extent. The application also provides a brightness correction system, equipment and a computer readable storage medium.
In order to achieve the above purpose, the present application provides the following technical solutions:
a luminance correction method, comprising:
determining a projection image obtained after the target projection equipment projects the detection image;
carrying out region division on the projection drawing to obtain corresponding projection division regions;
determining region brightness attenuation information of each of the projection division regions based on the detection map and the brightness of the projection map;
determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the region brightness attenuation information;
and determining brightness correction information of the target projection equipment according to the pixel point attenuation information, and performing brightness correction on the target projection equipment based on the brightness correction information.
Preferably, the determining the region brightness attenuation information of each of the projection division regions based on the detection map and the brightness of the projection map includes:
for each projection division area, selecting sampling points in the projection division area, and determining the brightness attenuation information of the sampling points through a normalization method based on the brightness of the sampling points in the detection graph and the projection graph; and determining the position information of the sampling points in the projection graph, and taking the position information of the sampling points and the corresponding brightness attenuation information of the sampling points as the brightness attenuation information of the area.
Preferably, the determining, by a normalization method, luminance attenuation information of the sampling points based on the luminance of the sampling points in the detection map and the projection map includes:
determining a first brightness value of the sampling point in the detection graph;
determining a second brightness value of the sampling point in the projection drawing;
dividing the second brightness value by the first brightness value to obtain a brightness attenuation proportion value of the sampling point;
determining the brightest point in the projection image;
determining a third brightness value of the brightest point in the projection image and determining a fourth brightness value of the brightest point in the detection image;
dividing the third brightness value and the fourth brightness value to obtain a brightness attenuation proportion value of the brightest point;
and taking the brightness attenuation proportion value of the brightest point as 1, and carrying out normalized mapping on the brightness attenuation proportion value of the sampling point to obtain corresponding brightness attenuation information of the sampling point.
Preferably, the determining the position information of the sampling point in the projection drawing includes:
acquiring the resolution of the target projection equipment;
determining a reference coordinate system based on the resolution and the projection drawing;
and determining coordinates of the sampling points in the projection graph based on the reference coordinate system, and taking the coordinates of the sampling points as the position information.
Preferably, the determining, according to the region brightness attenuation information, pixel brightness attenuation information of a preset number of pixels in the target projection device includes:
fitting a brightness attenuation model according to the region brightness attenuation information;
and determining the pixel point brightness attenuation information of the preset number of the pixel points in the target projection equipment through the brightness attenuation model.
Preferably, the fitting a brightness attenuation model according to the region brightness attenuation information includes:
fitting an attenuation parameter curved surface by taking the coordinates of the sampling point as an x value and a y value of a three-dimensional coordinate system and taking brightness attenuation information of the sampling point as a z value of the three-dimensional coordinate system;
and taking the attenuation parameter curved surface as the brightness attenuation model.
Preferably, the determining the brightness correction information of the target projection device according to the attenuation information of the pixel points includes:
determining a target brightness value for each pixel point, and determining brightness adjustment information based on the original brightness value of the pixel point, the attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on a corresponding relation between a preset brightness adjustment value and an RGB value and an original RGB value of the pixel point;
and using all the RGB adjustment information as the brightness correction information.
A brightness correction system, comprising:
the first determination module is used for determining a projection image obtained after the target projection equipment projects the detection image;
the first division module is used for carrying out region division on the projection drawing to obtain a corresponding projection division region;
a second determining module, configured to determine region brightness attenuation information of each of the projection division regions based on the detection map and the brightness of the projection map;
the third determining module is used for determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment according to the region brightness attenuation information;
and the fourth determining module is used for determining brightness correction information of the target projection equipment according to the pixel point attenuation information and performing brightness correction on the target projection equipment based on the brightness correction information.
A luminance correcting apparatus comprising:
a memory for storing a computer program;
a processor for implementing the steps of the brightness correction method as described above when executing the computer program.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the luminance correction method as set forth in any one of the above.
According to the brightness correction method, a projection image obtained after a target projection device projects a detection image is determined; carrying out region division on the projection drawing to obtain corresponding projection division regions; determining the region brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image; determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the regional brightness attenuation information; and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information. In the application, the projection image is divided into the projection division areas, the area brightness attenuation information of each projection division area is determined, and the range of the projection division areas is larger than the sampling point, so that the pixel brightness attenuation information can be rapidly determined based on the projection division areas, the brightness correction information of the target projection equipment can be rapidly determined, the brightness correction of the target projection equipment is rapidly realized, and the watching image quality of the projection equipment is improved. The brightness correction system, the brightness correction device and the computer readable storage medium solve the corresponding technical problems.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a first flowchart of a brightness correction method according to an embodiment of the present application;
fig. 2 is a second flowchart of a brightness correction method according to an embodiment of the present application;
fig. 3 is a third flowchart of a brightness correction method according to an embodiment of the present application;
fig. 4 is a fourth flowchart of a brightness correction method according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of a division of the projection of the present application;
fig. 6 is a schematic structural diagram of a brightness correction system according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a luminance correcting apparatus according to an embodiment of the present disclosure;
fig. 8 is another schematic structural diagram of a luminance correcting apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a first flowchart of a brightness correction method according to an embodiment of the present disclosure.
The brightness correction method provided by the embodiment of the application can comprise the following steps:
step S101: and determining a projection image obtained after the target projection equipment projects the detection image.
In practical application, the detection map may be selected first, and the target projection device is controlled to project the detection map to obtain the projection map, so that the brightness of the target projection device is corrected according to the projection map and the detection map in the following process. It should be noted that the type of target projection device may be determined according to actual needs, and the nature of the detection map may also be determined according to actual needs.
Step S102: and carrying out region division on the projection drawing to obtain corresponding projection division regions.
In practical application, after the projection image obtained after the target projection device projects the detection image is determined, considering that a plurality of pixel points are on the projection image and the brightness of the projection image shows regional variation, the projection image can be subjected to regional division to obtain corresponding projection division regions, and then the brightness correction information of the target projection device is analyzed based on the projection division regions.
Step S103: and determining the regional brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image.
In practical application, the projection division regions on the projection map can all find corresponding regions on the detection map, so that the region brightness attenuation information of each projection division region can be determined based on the detection map and the brightness of the projection map by taking the projection division regions as units, and it should be noted that the region brightness attenuation information represents the brightness attenuation influence of the target projection device on a certain projection region.
Step S104: and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment according to the region brightness attenuation information.
Step S105: and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information.
In practical application, because the projection image projected by the target projection equipment is composed of the pixels which can be projected by the target projection equipment, the pixels which can be projected by the target projection equipment can be analyzed and managed to realize the purpose of brightness correction of the target projection equipment, that is, the brightness attenuation information of the pixels of a preset number of pixels in the target projection equipment can be determined according to the regional brightness attenuation information, then the brightness correction information of the target projection equipment is determined according to the brightness attenuation information, and the brightness correction of the target projection equipment is performed on the basis of the brightness correction information. It should be noted that the preset number may be determined according to actual needs, for example, the preset number may be the number of all pixel points of the target projection device, or several pixel points, etc.
In a specific application scene, it may be difficult to determine a pixel point in the projection drawing, and at this time, in the process of determining the luminance attenuation information of the pixel point of each pixel point in the target projection device according to the region luminance attenuation information, the region luminance attenuation information of the specific region where the pixel point is located may be used as the pixel point luminance attenuation information of the pixel point. The shape of the specific region of the pixel point can be determined according to actual needs, for example, the specific region can be a circular region with the pixel point as a center of a circle, a square region with the pixel point as a center, and the like.
According to the brightness correction method, a projection image obtained after a target projection device projects a detection image is determined; carrying out region division on the projection drawing to obtain corresponding projection division regions; determining the region brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image; determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the regional brightness attenuation information; and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information. In the application, the projection image is divided into the projection division areas, the area brightness attenuation information of each projection division area is determined, and the range of the projection division areas is larger than the sampling point, so that the pixel brightness attenuation information can be rapidly determined based on the projection division areas, the brightness correction information of the target projection equipment can be rapidly determined, the brightness correction of the target projection equipment is rapidly realized, and the watching image quality of the projection equipment is improved.
Referring to fig. 2, fig. 2 is a second flowchart of a luminance correction method according to an embodiment of the present disclosure.
The brightness correction method provided by the embodiment of the application can comprise the following steps:
step S201: and determining a projection image obtained after the target projection equipment projects the detection image.
Step S202: and carrying out region division on the projection drawing to obtain corresponding projection division regions.
Step S203: and determining the region brightness attenuation information of each projection division region by a normalization method based on the detection image and the brightness of the projection image.
In practical applications, since the brightness values of the detection map and the projection map are different, the brightness values of the detection map and the projection map to be processed may be various and difficult to determine, so that if the brightness attenuation information is directly calculated based on the brightness values, the calculation complexity may be increased, and in the process of determining the region brightness attenuation information of each projection division region based on the brightness of the detection map and the projection map, the region brightness attenuation information of each projection division region may be determined by a normalization method based on the brightness of the detection map and the projection map in order to reduce the calculation complexity. In addition, because the value of the regional brightness attenuation information is fixed between (0, 1), and the pixel brightness attenuation information is a value determined based on the regional brightness attenuation information, the value of the pixel brightness attenuation information is also fixed between (0, 1), thereby facilitating the determination of the subsequent pixel brightness attenuation information, and correspondingly facilitating the determination of the subsequent brightness correction information.
Step S204: and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment according to the region brightness attenuation information.
Step S205: and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information.
In an actual application scene, the process of determining the region brightness attenuation information of each projection division region by a normalization method based on the detection map and the brightness of the projection map may specifically be: for each projection division area, selecting sampling points in the projection division area, determining the brightness attenuation information of the sampling points through a normalization method based on the brightness of the sampling points in the detection graph and the projection graph, determining the position information of the sampling points in the projection graph, and taking the position information of the sampling points and the corresponding brightness attenuation information of the sampling points as the area brightness attenuation information. That is, the area brightness attenuation information may be determined based on the brightness attenuation information of the sampling points in the projection division area, and specifically, an average value of the brightness attenuation information of the sampling points in the projection division area may be used as the area brightness attenuation information.
In a specific application scenario, based on the brightness of the sampling points in the detection graph and the projection graph, the process of determining the brightness attenuation information of the sampling points by a normalization method may specifically be: determining a first brightness value of the sampling point in the detection graph; determining a second brightness value of the sampling point in the projection graph; dividing the second brightness value by the first brightness value to obtain a brightness attenuation proportion value of the sampling point; determining the brightest point in the projection image; determining a third brightness value of the brightest point in the projection image and determining a fourth brightness value of the brightest point in the detection image; dividing the third brightness value by the fourth brightness value to obtain a brightness attenuation proportion value of the brightest point; and taking the brightness attenuation proportion value of the brightest point as 1, and carrying out normalized mapping on the brightness attenuation proportion value of the sampling point to obtain corresponding sampling point brightness attenuation information. Because the brightness attenuation proportion value of the brightest point is taken as 1, and the brightness attenuation proportion value of the sampling point is subjected to normalized mapping to obtain the corresponding brightness attenuation proportion value of the sampling point, the brightness attenuation proportion value of the sampling point reflects the brightness difference value between the sampling point and the brightest point in the projection image, and after the brightness difference value is compensated, the brightness of the sampling point is the same as that of the brightest point, so the brightness attenuation proportion value of the sampling point in the embodiment can be used for performing brightness balance correction on the target projection equipment.
In a specific application scenario, based on the brightness of the sampling points in the detection graph and the projection graph, the process of determining the brightness attenuation information of the sampling points by a normalization method may specifically be: determining a first brightness value of the sampling point in the detection graph; determining a second brightness value of the sampling point in the projection graph; and dividing the second brightness value by the first brightness value to obtain corresponding sampling point brightness attenuation information. The second brightness value is directly divided by the first brightness value to obtain corresponding sampling point brightness attenuation information, so that the brightness attenuation information of the sampling point in the embodiment reflects the brightness difference of the sampling point projected by the target projection equipment, and after the brightness difference is compensated, the brightness of the same point in the detection graph and the projection graph is the same, so that the brightness compensation and correction can be performed on the target projection equipment by the sampling point brightness attenuation information in the embodiment, and the brightness information of the image before and after being projected by the target projection equipment is ensured to be unchanged.
In the brightness correction method provided in the embodiment of the present application, since the resolution of the target projection device determines the number of pixels in the projection drawing, and the position information of the sampling point can be represented according to the coordinate of the sampling point in the projection drawing, the process of determining the position information of the sampling point in the projection drawing can specifically be: acquiring the resolution of target projection equipment; determining a reference coordinate system based on the resolution and the projection drawing; and determining the coordinates of the sampling point in the projection drawing based on the reference coordinate system, and taking the coordinates of the sampling point as position information. The reference coordinate system can be determined based on the resolution of the target projection equipment and the size of the projection graph, so that correlation exists between the reference coordinate system and the pixel points of the target projection equipment, and the coordinate information of the pixel points can be conveniently determined according to the correlation and the coordinates of sampling points.
Referring to fig. 3, fig. 3 is a first flowchart of a luminance correction method according to an embodiment of the present application.
The brightness correction method provided by the embodiment of the application can comprise the following steps:
step S301: and determining a projection image obtained after the target projection equipment projects the detection image.
Step S302: and carrying out region division on the projection drawing to obtain corresponding projection division regions.
Step S303: and determining the regional brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image.
Step S304: fitting a brightness attenuation model according to the regional brightness attenuation information; and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment through a brightness attenuation model.
In practical application, according to the regional brightness attenuation information, the process of determining the pixel brightness attenuation information of a preset number of pixels in the target projection device may specifically be: fitting a brightness attenuation model according to the regional brightness attenuation information; and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment through a brightness attenuation model. That is, the luminance attenuation information of the pixel points can be determined based on the luminance attenuation model.
In an application scene, because brightness is affected by distance, and the position information of a pixel point can reflect distance information, according to regional brightness attenuation information, the process of fitting a brightness attenuation model can be specifically as follows: fitting an attenuation parameter curved surface by taking the coordinates of the sampling point as the x value and the y value of a three-dimensional coordinate system and taking the brightness attenuation information of the sampling point as the z value of the three-dimensional coordinate system; and taking the attenuation parameter curved surface as a brightness attenuation model.
Step S305: and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information.
Referring to fig. 4, fig. 4 is a fourth flowchart of a brightness correction method according to an embodiment of the present disclosure.
The brightness correction method provided by the embodiment of the application can comprise the following steps:
step S401: and determining a projection image obtained after the target projection equipment projects the detection image.
Step S402: and carrying out region division on the projection drawing to obtain corresponding projection division regions.
Step S403: and determining the regional brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image.
Step S404: and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment according to the region brightness attenuation information.
Step S405: determining a target brightness value for each pixel point, and determining brightness adjustment information based on the original brightness value of the pixel point, attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on the corresponding relation between the preset brightness adjustment value and the RGB value and the original RGB value of the pixel point; all the RGB adjustment information is taken as luminance correction information.
In practical application, since the RGB values of the pixel points may inversely map the luminance values of the pixel points, the RGB values of the pixel points may be adjusted to change the luminance values of the pixel points, that is, the process of determining the luminance correction information of the target projection device according to the attenuation information of the pixel points may specifically be: determining a target brightness value for each pixel point, and determining brightness adjustment information based on the original brightness value of the pixel point, attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on the corresponding relation between the preset brightness adjustment value and the RGB value and the original RGB value of the pixel point; all the RGB adjustment information is taken as luminance correction information.
In a specific application scenario, for example, there are two pixels with brightness values of 90 and 110, when the pixel with brightness value of 90 is adjusted to the pixel with brightness of 100, and when the pixel with brightness value of 110 is adjusted to the pixel with brightness of 100, RGB value adjustment information of the two pixels may be different, so that a correspondence between a brightness change condition and an RGB change condition is not fixed, and therefore, in order to determine the correspondence between the brightness adjustment value and the RGB value, the brightness change condition and the corresponding RGB change condition in an actual application scenario may be counted to obtain the correspondence between the brightness adjustment value and the RGB value.
In a specific application scenario, in the process of determining the target brightness value and determining the brightness adjustment information based on the original brightness value of the pixel, the attenuation information of the pixel, and the target brightness value, the target brightness value of the pixel may be determined according to a brightness correction target for the target projection device, for example, when the brightness correction target is a brightness balance, the brightness value of the projected image may be used as the target brightness value.
Step S406: and performing brightness correction on the target projection device based on the brightness correction information.
In the brightness correction method provided by the embodiment of the application, in order to facilitate brightness correction of the target projection device, the detection graph in the application can be set as a graph with balanced brightness, so that the influence of different brightness of the detection graph on a subsequent brightness correction process is avoided, and the calculation of subsequent brightness attenuation information can be facilitated; and in the process of carrying out region division on the projection drawing to obtain the corresponding projection division region, the region division can be carried out on the projection drawing according to the equipartition principle to obtain the corresponding projection division region. Please refer to fig. 5, fig. 5 is a schematic diagram illustrating a division of a projection diagram according to the present application. In fig. 5, each of the projection division regions is a rectangle having the same specification, and the sampling points in each of the projection division regions may be points on the boundary of the projection division region.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a brightness correction system according to an embodiment of the present disclosure.
The brightness correction system provided by the embodiment of the application can comprise:
the first determining module 101 is configured to determine a projection diagram obtained after the target projection device projects the detection diagram;
the first dividing module 102 is configured to perform region division on the projection drawing to obtain corresponding projection divided regions;
a second determining module 103, configured to determine region brightness attenuation information of each of the projection division regions based on the detection map and the brightness of the projection map;
a third determining module 104, configured to determine, according to the regional brightness attenuation information, pixel brightness attenuation information of a preset number of pixels in the target projection device;
and a fourth determining module 105, configured to determine, according to the pixel point attenuation information, luminance correction information of the target projection device, and perform luminance correction on the target projection device based on the luminance correction information.
In an embodiment of the brightness correction system, the second determining module may include:
and the first determining submodule is used for determining the regional brightness attenuation information of each projection division region through a normalization method based on the detection image and the brightness of the projection image.
In an embodiment of the brightness correction system, the first determining sub-module may include:
the second determining sub-module is used for selecting sampling points in the projection division areas for each projection division area, and determining the brightness attenuation information of the sampling points through a normalization method based on the brightness of the sampling points in the detection graph and the projection graph; and determining the position information of the sampling points in the projection drawing, and taking the position information of the sampling points and the brightness attenuation information of the corresponding sampling points as the regional brightness attenuation information.
In an embodiment of the brightness correction system, the second determining sub-module may include:
the first determining unit is used for determining a first brightness value of the sampling point in the detection image; determining a second brightness value of the sampling point in the projection graph;
the first calculating unit is used for dividing the second brightness value by the first brightness value to obtain a brightness attenuation proportion value of the sampling point;
the second determining unit is used for determining the brightest point in the projection image; determining a third brightness value of the brightest point in the projection image and determining a fourth brightness value of the brightest point in the detection image;
the second calculation unit is used for dividing the third brightness value and the fourth brightness value to obtain a brightness attenuation proportion value of the brightest point;
and the first normalization unit is used for taking the brightness attenuation proportion value of the brightest point as 1 and carrying out normalization mapping on the brightness attenuation proportion value of the sampling point to obtain corresponding sampling point brightness attenuation information.
In an embodiment of the brightness correction system, the second determining sub-module may include:
a third determining unit, configured to determine a first brightness value of the sampling point in the detection map; determining a second brightness value of the sampling point in the projection graph;
and the third calculating unit is used for dividing the second brightness value by the first brightness value to obtain corresponding sampling point brightness attenuation information.
In an embodiment of the brightness correction system, the second determining sub-module may include:
a first acquisition unit for acquiring a resolution of a target projection apparatus;
a fourth determining unit, configured to determine a reference coordinate system based on the resolution and the projection view;
and the first setting unit is used for determining the coordinates of the sampling points in the projection graph based on the reference coordinate system and taking the coordinates of the sampling points as the position information.
In an embodiment of the brightness correction system, the third determining module may include:
the first fitting submodule is used for fitting a brightness attenuation model according to the regional brightness attenuation information;
and the third determining submodule is used for determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment through the brightness attenuation model.
In an embodiment of the brightness correction system, the first fitting sub-module may include:
the second setting unit is used for fitting the attenuation parameter curved surface by taking the coordinates of the sampling point as the x value and the y value of the three-dimensional coordinate system and taking the brightness attenuation information of the sampling point as the z value of the three-dimensional coordinate system; and taking the attenuation parameter curved surface as a brightness attenuation model.
In an embodiment of the brightness correction system, the fourth determining module may include:
the third setting unit is used for determining a target brightness value for each pixel point and determining brightness adjustment information based on the original brightness value of the pixel point, attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on the corresponding relation between the preset brightness adjustment value and the RGB value and the original RGB value of the pixel point; all the RGB adjustment information is taken as luminance correction information.
In the brightness correction system provided in the embodiment of the present application, the detection map may include a brightness equalization map;
the first division module may include:
and the first dividing unit is used for dividing the region of the projection graph according to an equipartition principle to obtain a corresponding projection divided region.
The application also provides a brightness correction device and a computer readable storage medium, which have the corresponding effects of the brightness correction method provided by the embodiment of the application. Referring to fig. 7, fig. 7 is a schematic structural diagram of a luminance correcting apparatus according to an embodiment of the present disclosure.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program:
determining a projection image obtained after the target projection equipment projects the detection image;
carrying out region division on the projection drawing to obtain corresponding projection division regions;
determining the region brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image;
determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the regional brightness attenuation information;
and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: and determining the region brightness attenuation information of each projection division region by a normalization method based on the detection image and the brightness of the projection image.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: for each projection division area, selecting sampling points in the projection division area, and determining the brightness attenuation information of the sampling points by a normalization method based on the brightness of the sampling points in the detection graph and the projection graph; and determining the position information of the sampling points in the projection drawing, and taking the position information of the sampling points and the brightness attenuation information of the corresponding sampling points as the regional brightness attenuation information.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: determining a first brightness value of the sampling point in the detection graph; determining a second brightness value of the sampling point in the projection graph; dividing the second brightness value by the first brightness value to obtain a brightness attenuation proportion value of the sampling point; determining the brightest point in the projection image; determining a third brightness value of the brightest point in the projection image and determining a fourth brightness value of the brightest point in the detection image; dividing the third brightness value by the fourth brightness value to obtain a brightness attenuation proportion value of the brightest point; and taking the brightness attenuation proportion value of the brightest point as 1, and carrying out normalized mapping on the brightness attenuation proportion value of the sampling point to obtain corresponding sampling point brightness attenuation information.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: determining a first brightness value of the sampling point in the detection graph; determining a second brightness value of the sampling point in the projection graph; and dividing the second brightness value by the first brightness value to obtain corresponding sampling point brightness attenuation information.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: acquiring the resolution of target projection equipment; determining a reference coordinate system based on the resolution and the projection drawing; and determining the coordinates of the sampling point in the projection drawing based on the reference coordinate system, and taking the coordinates of the sampling point as position information.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: fitting a brightness attenuation model according to the regional brightness attenuation information; and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment through a brightness attenuation model.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: fitting an attenuation parameter curved surface by taking the coordinates of the sampling point as the x value and the y value of a three-dimensional coordinate system and taking the brightness attenuation information of the sampling point as the z value of the three-dimensional coordinate system; and taking the attenuation parameter curved surface as a brightness attenuation model.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: determining a target brightness value for each pixel point, and determining brightness adjustment information based on the original brightness value of the pixel point, attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on the corresponding relation between the preset brightness adjustment value and the RGB value and the original RGB value of the pixel point; all the RGB adjustment information is taken as luminance correction information.
The luminance correction device provided by the embodiment of the application comprises a memory 201 and a processor 202, wherein a computer program is stored in the memory 201, and the processor 202 realizes the following steps when executing the computer program: the detection map includes a map of luminance equalization; and carrying out region division on the projection drawing according to an equipartition principle to obtain corresponding projection division regions.
Referring to fig. 8, another luminance correction apparatus provided in the embodiment of the present application may further include: an input port 203 connected to the processor 202, for transmitting externally input commands to the processor 202; a display unit 204 connected to the processor 202, for displaying the processing result of the processor 202 to the outside; and a communication module 205 connected to the processor 202 for implementing communication between the brightness correction device and the outside. The display unit 204 may be a display panel, a laser scanning display, or the like; the communication method adopted by the communication module 205 includes, but is not limited to, mobile high definition link technology (HML), Universal Serial Bus (USB), High Definition Multimedia Interface (HDMI), and wireless connection: wireless fidelity technology (WiFi), bluetooth communication technology, bluetooth low energy communication technology, ieee802.11s based communication technology.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps:
determining a projection image obtained after the target projection equipment projects the detection image;
carrying out region division on the projection drawing to obtain corresponding projection division regions;
determining the region brightness attenuation information of each projection division region based on the detection image and the brightness of the projection image;
determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the regional brightness attenuation information;
and determining brightness correction information of the target projection equipment according to the attenuation information of the pixel points, and performing brightness correction on the target projection equipment based on the brightness correction information.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: and determining the region brightness attenuation information of each projection division region by a normalization method based on the detection image and the brightness of the projection image.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: for each projection division area, selecting sampling points in the projection division area, and determining the brightness attenuation information of the sampling points by a normalization method based on the brightness of the sampling points in the detection graph and the projection graph; and determining the position information of the sampling points in the projection drawing, and taking the position information of the sampling points and the brightness attenuation information of the corresponding sampling points as the regional brightness attenuation information.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: determining a first brightness value of the sampling point in the detection graph; determining a second brightness value of the sampling point in the projection graph; dividing the second brightness value by the first brightness value to obtain a brightness attenuation proportion value of the sampling point; determining the brightest point in the projection image; determining a third brightness value of the brightest point in the projection image and determining a fourth brightness value of the brightest point in the detection image; dividing the third brightness value by the fourth brightness value to obtain a brightness attenuation proportion value of the brightest point; and taking the brightness attenuation proportion value of the brightest point as 1, and carrying out normalized mapping on the brightness attenuation proportion value of the sampling point to obtain corresponding sampling point brightness attenuation information.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: determining a first brightness value of the sampling point in the detection graph; determining a second brightness value of the sampling point in the projection graph; and dividing the second brightness value by the first brightness value to obtain corresponding sampling point brightness attenuation information.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: acquiring the resolution of target projection equipment; determining a reference coordinate system based on the resolution and the projection drawing; and determining the coordinates of the sampling point in the projection drawing based on the reference coordinate system, and taking the coordinates of the sampling point as position information.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: fitting a brightness attenuation model according to the regional brightness attenuation information; and determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment through a brightness attenuation model.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: fitting an attenuation parameter curved surface by taking the coordinates of the sampling point as the x value and the y value of a three-dimensional coordinate system and taking the brightness attenuation information of the sampling point as the z value of the three-dimensional coordinate system; and taking the attenuation parameter curved surface as a brightness attenuation model.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: determining a target brightness value for each pixel point, and determining brightness adjustment information based on the original brightness value of the pixel point, attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on the corresponding relation between the preset brightness adjustment value and the RGB value and the original RGB value of the pixel point; all the RGB adjustment information is taken as luminance correction information.
A computer-readable storage medium is provided in an embodiment of the present application, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the following steps: the detection map includes a map of luminance equalization; and carrying out region division on the projection drawing according to an equipartition principle to obtain corresponding projection division regions.
The computer-readable storage media to which this application relates include Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage media known in the art.
For a description of a relevant part in a brightness correction system, a device and a computer readable storage medium provided in the embodiments of the present application, please refer to the detailed description of the corresponding part in a brightness correction method provided in the embodiments of the present application, which is not repeated herein. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A luminance correction method, comprising:
determining a projection image obtained after the target projection equipment projects the detection image;
carrying out region division on the projection drawing to obtain corresponding projection division regions;
determining region brightness attenuation information of each of the projection division regions based on the detection map and the brightness of the projection map;
determining pixel point brightness attenuation information of a preset number of pixel points in the target projection equipment according to the region brightness attenuation information;
and determining brightness correction information of the target projection equipment according to the pixel point attenuation information, and performing brightness correction on the target projection equipment based on the brightness correction information.
2. The method of claim 1, wherein said determining region brightness attenuation information for each of said projected subareas based on said detection map and said brightness of said projected map comprises:
for each projection division area, selecting sampling points in the projection division area, and determining the brightness attenuation information of the sampling points through a normalization method based on the brightness of the sampling points in the detection graph and the projection graph; and determining the position information of the sampling points in the projection graph, and taking the position information of the sampling points and the corresponding brightness attenuation information of the sampling points as the brightness attenuation information of the area.
3. The method according to claim 2, wherein the determining, by a normalization method, luminance decay information of the sampling points based on the luminance of the sampling points in the detection map and the projection map comprises:
determining a first brightness value of the sampling point in the detection graph;
determining a second brightness value of the sampling point in the projection drawing;
dividing the second brightness value by the first brightness value to obtain a brightness attenuation proportion value of the sampling point;
determining the brightest point in the projection image;
determining a third brightness value of the brightest point in the projection image and determining a fourth brightness value of the brightest point in the detection image;
dividing the third brightness value and the fourth brightness value to obtain a brightness attenuation proportion value of the brightest point;
and taking the brightness attenuation proportion value of the brightest point as 1, and carrying out normalized mapping on the brightness attenuation proportion value of the sampling point to obtain corresponding brightness attenuation information of the sampling point.
4. The method according to claim 2 or 3, wherein the determining the position information of the sampling point in the projection map comprises:
acquiring the resolution of the target projection equipment;
determining a reference coordinate system based on the resolution and the projection drawing;
and determining coordinates of the sampling points in the projection graph based on the reference coordinate system, and taking the coordinates of the sampling points as the position information.
5. The method as claimed in claim 4, wherein said determining pixel luminance attenuation information of a predetermined number of pixels in said target projection device according to said regional luminance attenuation information comprises:
fitting a brightness attenuation model according to the region brightness attenuation information;
and determining the pixel point brightness attenuation information of the preset number of the pixel points in the target projection equipment through the brightness attenuation model.
6. The method of claim 5, wherein said fitting a luminance decay model to said regional luminance decay information comprises:
fitting an attenuation parameter curved surface by taking the coordinates of the sampling point as an x value and a y value of a three-dimensional coordinate system and taking brightness attenuation information of the sampling point as a z value of the three-dimensional coordinate system;
and taking the attenuation parameter curved surface as the brightness attenuation model.
7. The method of claim 1, wherein said determining brightness correction information for said target projection device based on said pixel attenuation information comprises:
determining a target brightness value for each pixel point, and determining brightness adjustment information based on the original brightness value of the pixel point, the attenuation information of the pixel point and the target brightness value; determining RGB adjustment information corresponding to the brightness adjustment information based on a corresponding relation between a preset brightness adjustment value and an RGB value and an original RGB value of the pixel point;
and using all the RGB adjustment information as the brightness correction information.
8. A brightness correction system, comprising:
the first determination module is used for determining a projection image obtained after the target projection equipment projects the detection image;
the first division module is used for carrying out region division on the projection drawing to obtain a corresponding projection division region;
a second determining module, configured to determine region brightness attenuation information of each of the projection division regions based on the detection map and the brightness of the projection map;
the third determining module is used for determining the pixel brightness attenuation information of a preset number of pixels in the target projection equipment according to the region brightness attenuation information;
and the fourth determining module is used for determining brightness correction information of the target projection equipment according to the pixel point attenuation information and performing brightness correction on the target projection equipment based on the brightness correction information.
9. A luminance correction apparatus characterized by comprising:
a memory for storing a computer program;
a processor for implementing the steps of the luminance correction method as claimed in any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the luminance correction method as claimed in any one of claims 1 to 7.
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