CN114299857A - Multilayer correction method and device for LED display screen and computer equipment - Google Patents
Multilayer correction method and device for LED display screen and computer equipment Download PDFInfo
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Abstract
The invention relates to a multilayer correction method, a multilayer correction device and computer equipment for an LED display screen, wherein the method comprises the following steps: storing a plurality of sets of correction coefficients in a receiving card in advance according to a preset storage strategy, wherein each set of correction coefficient corresponds to a gray scale segmentation range; determining a gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determining a gray scale segmentation range of a correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected; determining and reading the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient; and correcting the LED display screen according to the correction coefficient of each lamp point to be corrected. The method, the device and the computer equipment provided by the invention can improve the reading efficiency of the correction coefficient, further improve the correction efficiency, and simultaneously determine the appropriate correction coefficient and improve the correction effect.
Description
Technical Field
The invention relates to the field of correction of LED display screens, in particular to a multilayer correction method and device of an LED display screen and computer equipment.
Background
The LED display screen can be composed of a plurality of boxes, the lighting point in each box has brightness and chrominance difference, the brightness and chrominance of the LED display screen need to be corrected through correction coefficients, a layered correction mode (multilayer correction) can be used at the moment, a plurality of sets of correction coefficients exist in the multilayer correction, the explanation is carried out by using 4 layers of correction, and the 4 layers of correction involve the processing of 4 sets of correction coefficients.
However, at any moment, each lamp point to be corrected only needs 1 correction coefficient, and if the correction coefficients in all layers (4-layer correction, that is, 4 sets of correction coefficients) are stored in the SDRAM or DDR of the receiving card first and then read out from the SDRAM or DDR of the receiving card when correction is needed, the cost is very high, that is, the reading efficiency is reduced.
Therefore, the storage format and reading mode of the correction coefficient in the external storage (SDRAM or DDR of the receiving card) will greatly influence the reading efficiency; therefore, the present invention is directed to a new technical solution to solve the above problems.
Disclosure of Invention
Aiming at the problems, the invention provides a multilayer correction method and device for an LED display screen and computer equipment, and the reading efficiency of correction coefficients is improved.
The invention provides a multilayer correction method of an LED display screen, which comprises the following steps: storing a plurality of sets of correction coefficients in a receiving card in advance according to a preset storage strategy, wherein each set of correction coefficient corresponds to a gray scale segmentation range; wherein, presetting the storage strategy comprises: for each set of correction coefficients, separately storing the correction coefficients corresponding to the lamp points according to the colors of the lamp points;
acquiring the gray scale of each lamp point to be corrected, determining the gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected;
determining and reading the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient;
and correcting the LED display screen according to the correction coefficient of each lamp point to be corrected.
Further, determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected comprises the following steps:
comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segmentation range respectively, and determining the gamma value range in which the gamma value of each lamp point to be corrected is located;
and determining the gray scale segmentation range corresponding to the gamma value range of the gamma value of each lamp point to be corrected as the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected.
Further, the gamma value range corresponding to each gray scale segment range includes a red lamp gamma value range, a green lamp gamma value range and a blue lamp gamma value range, and comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segment range respectively includes:
selecting a gamma value range corresponding to the color of each lamp point to be corrected from the gamma value range of the red lamp, the gamma value range of the green lamp and the gamma value range of the blue lamp as a target gamma value range; and comparing the gamma value of each lamp point to be corrected with the target gamma value range of the lamp point to be corrected in different gray scale segmentation ranges.
Further, a plurality of sets of correction coefficients are stored in the receiving card in advance according to a preset storage strategy, wherein the correction coefficients are as follows:
and storing a plurality of sets of correction coefficients in a synchronous dynamic random access memory in the receiving card in advance according to a preset storage strategy.
Further, the preset storage policy further includes:
and storing the correction coefficients corresponding to the lamp points of the same lamp point color into a synchronous dynamic random access memory in the receiving card according to the arrangement sequence of the lamp points in the LED display screen.
Further, the gray scale segmentation range is preset according to a first segmentation strategy or a second segmentation strategy, wherein:
the first segmentation strategy comprises: acquiring a plurality of preset gray scale threshold values, determining a plurality of gamma value ranges according to the gamma threshold value corresponding to each gray scale threshold value, and taking the gray scale range corresponding to each gamma value range as a preset gray scale segmentation range;
the second segmentation strategy comprises:
the method comprises the steps of obtaining a plurality of preset gray scale threshold values, selecting a target gray scale between two adjacent gray scale threshold values in advance, determining a plurality of target gray scales, determining a plurality of gamma value ranges according to the gamma threshold value corresponding to each target gray scale, and taking the gray scale range corresponding to each gamma value range as a preset gray scale segmentation range.
Further, the correction coefficient of the target gray scale is obtained according to a preset interpolation processing strategy, wherein the preset interpolation processing strategy comprises:
and determining a correction coefficient corresponding to the target gray scale between two adjacent gray scale threshold values according to the gamma value and the correction coefficient corresponding to the two adjacent gray scale threshold values and the gamma value corresponding to the target gray scale between the two adjacent gray scale threshold values.
The invention also provides a multilayer correction device for the LED display screen, which comprises: the device comprises a storage module, a gray scale segmentation range determining module, a correction coefficient determining module and a correction module, wherein:
the storage module is connected with the gray scale segmentation range determining module and is used for storing a plurality of sets of correction coefficients in the receiving card in advance according to a preset storage strategy, and each set of correction coefficient corresponds to one gray scale segmentation range; wherein the preset storage strategy comprises: for each set of correction coefficients, separately storing the correction coefficients corresponding to the lamp points according to the colors of the lamp points;
the gray scale segmentation range determining module is connected with the correction coefficient determining module and is used for acquiring the gray scale of each lamp point to be corrected, determining the gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected;
the correction coefficient determining module is connected with the correction module and used for determining and reading the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient;
and the correction module is used for correcting the LED display screen according to the correction coefficient of each lamp point to be corrected.
Further, the determining module for gray scale segmentation range determines the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected, and comprises:
comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segmentation range respectively, and determining the gamma value range in which the gamma value of each lamp point to be corrected is located;
and determining the gray scale segmentation range corresponding to the gamma value range of the gamma value of each lamp point to be corrected as the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected.
The invention also provides computer equipment which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the LED display screen multilayer correction method when executing the computer program.
The multilayer correction method, the multilayer correction device and the computer equipment for the LED display screen, provided by the invention, at least have the following beneficial effects:
the invention provides a multilayer correction method, a device and a computer device for an LED display screen, which pre-store a plurality of sets of correction coefficients in the multilayer correction when the multilayer correction of the LED display screen is carried out, separately store the correction coefficients corresponding to lamp points according to the colors of the lamp points for each set of correction coefficients, firstly determine the gray scale segmentation range corresponding to the correction coefficient required by the lamp points to be corrected when the subsequent lamp points to be corrected are required to be corrected, then determine and read the correction coefficient of each lamp point to be corrected according to the colors and gray scales of the lamp points to be corrected, and correct the LED display screen according to the correction coefficient of each lamp point to be corrected. And then can improve the correction efficiency of LED display screen.
In addition, when the correction coefficient of the lamp point to be corrected is read, the correction coefficient of the lamp point to be corrected is determined according to the color and the gray scale of the lamp point to be corrected and the gray scale segmentation range corresponding to the correction coefficient required by the lamp point to be corrected, so that the determined correction coefficient is the correction coefficient meeting the correction requirement of the lamp point to be corrected, and the correction effect can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating the steps of multi-layer calibration of an LED display screen according to an embodiment of the present invention;
FIG. 2 is a flowchart of the gray scale segmentation limit determination step in one embodiment of the present invention;
FIG. 3 is a schematic view of a multi-layer calibration device for an LED display screen according to an embodiment of the present invention;
FIG. 4 is a flow chart of a computer device in an embodiment of the invention.
501-storage module, 502-gray scale segmentation range determination module, 503-correction coefficient determination module, 504-correction module, 6-computer device, 601-processor, 602-memory.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment of the present invention, a method for multi-layer calibration of an LED display screen is disclosed, as shown in fig. 1, the method comprising the steps of:
step S101: and storing a plurality of sets of correction coefficients in the receiving card in advance according to a preset storage strategy, wherein each set of correction coefficients corresponds to a gray scale segmentation range.
In one implementation manner of this step, storing multiple sets of correction coefficients in the receiving card according to a preset storage policy in advance is: and storing a plurality of sets of correction coefficients in a Synchronous Dynamic Random Access Memory (SDRAM) in the receiving card in advance according to a preset storage strategy. Further, the data is stored in the SDRAM row of the receiving card.
That is, in this implementation, the correction coefficients are stored in a synchronous dynamic random access memory in the receiving card, rather than in a flash memory (flash) of the receiving card.
Specifically, in an implementation manner, the presetting of the storage policy includes: and for each set of correction coefficients, separately storing the correction coefficients corresponding to the lamp points according to the lamp point colors.
In the LED display screen, each pixel point comprises 3 lamp points (R/G/B lamp points), each lamp point has a corresponding correction coefficient, namely each pixel point has 3 correction coefficients (a red lamp correction coefficient, a blue lamp correction coefficient and a green lamp correction coefficient).
For brightness and chrominance correction, all pixel points (i.e., all lamp points) in the LED display screen need to be corrected, so each set of correction coefficients includes correction coefficients corresponding to all pixel points in the LED display screen. For seam repair correction, the seam repair correction only needs to be performed on pixel points at positions with bright and dark line problems in the LED display screen, and other pixel points do not need to be subjected to seam repair correction, so that each set of correction coefficients only contains correction coefficients corresponding to the pixel points needing seam repair correction.
Further, each set of correction coefficients is stored separately, that is, the correction coefficients of each pixel are divided into 3 parts (respectively corresponding to R/G/B lamp points), and are stored according to colors (that is, the red correction coefficients, the blue correction coefficients and the green correction coefficients of each pixel are stored together).
When storing, each correction coefficient may be 32bit or 22bit (including 1 main coefficient and 2 small coefficients, where 32bit is composed of 12bit main coefficient +10bit small coefficient, and 22bit is composed of 8bit main coefficient +6bit small coefficient, it should be understood that the above description is only exemplified by the more common bit number, and is not a limitation to the present invention.
The correction coefficient of each pixel point is divided into 3 parts, the correction coefficients are stored according to colors, and for a 32-bit SDRAM, the reading efficiency is very high (the required correction coefficients can be read out completely during each reading, and the unnecessary correction coefficients cannot be read out or only are read out partially).
Further, in another implementation manner, the presetting of the storage policy is based on the preset storage policy, and the method further includes: and storing the correction coefficients corresponding to the lamp points with the same lamp point color according to the arrangement sequence of the lamp points in the LED display screen.
That is, the calibration coefficients stored in the SDRAM row of the receiving card are RRR … RR, GG … GGG, BB … BBB, and the lamp points corresponding to two adjacent calibration coefficients are also adjacent on the LED display screen. Since the correlation between adjacent display data in the normal video is high, in this embodiment, the correction coefficients of adjacent lamp points are put together, and when reading the lamp point correction coefficient subsequently, the reading efficiency is high for a 32-bit SDRAM, and when reading the correction coefficient required by a certain lamp point to be corrected for a 64-bit SDRAM, even if the correction coefficient adjacent to the correction coefficient required by the lamp point to be corrected is also read, the correction coefficient read more than once is also the correction coefficient required by the lamp point to be corrected adjacent to the lamp point to be corrected, and therefore, for the 64-bit SDRAM, the reading efficiency can be improved by the implementation manner.
Further, the gray scale segmentation range is preset according to the first segmentation strategy or the second segmentation strategy.
Wherein the first preset segmentation strategy comprises: acquiring a plurality of preset gray scale threshold values, determining a plurality of gamma value ranges according to the gamma threshold value corresponding to each gray scale threshold value, and taking the gray scale range corresponding to each gamma value range as a preset gray scale segmentation range.
Specifically, a plurality of gamma value ranges are determined according to the gamma threshold value corresponding to each gray scale threshold value, that is, a range formed by two adjacent gamma threshold values is used as one gamma value range, so that a plurality of gamma value ranges are obtained.
Specifically, a plurality of gray scale threshold values can be preset by a technician according to actual needs, so as to determine a plurality of gray scale segmentation ranges, the actual needs refer to the quality requirements of the display picture of the display screen, and in the multi-layer correction, the higher the quality requirements of the display picture are, the more the number of the gray scale segmentation ranges is, and therefore, the higher the number of the gray scale threshold values is.
After the gray scale segmentation ranges are set, a set of corresponding correction coefficients is set for each gray scale segmentation range, and step S101 is further performed.
The second preset segmentation strategy comprises:
the method comprises the steps of obtaining a plurality of preset gray scale threshold values, selecting a target gray scale between two adjacent gray scale threshold values in advance, determining a plurality of target gray scales, determining a plurality of gamma value ranges according to the gamma threshold value corresponding to each target gray scale, and taking the gray scale range corresponding to each gamma value range as a preset gray scale segmentation range.
Further, the correction coefficient of the target gray scale is obtained according to a preset interpolation processing strategy, wherein the preset interpolation processing strategy comprises:
and determining a correction coefficient corresponding to the target gray scale between two adjacent gray scale threshold values according to the gamma value and the correction coefficient corresponding to the two adjacent gray scale threshold values and the gamma value corresponding to the target gray scale between the two adjacent gray scale threshold values.
Furthermore, according to the gamma value and the correction coefficient corresponding to the two adjacent gray scale threshold values and the gamma value corresponding to the target gray scale between the two adjacent gray scale threshold values, the correction coefficient corresponding to the target gray scale between the two adjacent gray scale threshold values is determined, that is, the correction coefficient of the target gray scale is calculated by adopting a linear interpolation processing method. Of course, other interpolation processing methods may be used to calculate the correction coefficient of the target gray scale, which is not limited in the present invention.
Taking two adjacent gray scale threshold values of C0 and C1 as an example, if the gamma value corresponding to C0 is a0, the correction coefficient is C0; if the gamma value corresponding to C1 is a1, the correction coefficient is C1, and the gamma value corresponding to the target gray level between C0 and C1 is a2, then the linear interpolation processing method is used to calculate the correction coefficient C2 corresponding to the target gray level as follows:
in addition, the correction coefficient of the target gray scale can be calculated according to the following weight value calculation method:
taking two adjacent gray scale threshold values of C0 and C1 as an example, if the gamma value corresponding to C0 is a0, the correction coefficient is C0; the gamma value corresponding to C1 is a1, the correction coefficient is C1, the gamma value corresponding to the target gray level between C0 and C1 is a2, and then the correction coefficient C2 corresponding to the target gray level is calculated by using a weight value method as follows:
according to the formula C2 ═ w1 ═ C0+ w2 ═ C1, the correction coefficient C2 of the target gray scale is calculated, wherein w1 and w2 are weighted values.
According to the following steps:
w1+ w2 is 1, and w1 and w2 are calculated.
Step S102: the method comprises the steps of obtaining the gray scale of each lamp point to be corrected, determining the gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected.
In this step, the gray scale of each lamp point to be corrected is obtained by the following method: and acquiring an image displayed by the LED display screen, and determining the gray scale of each lamp point to be corrected according to the displayed image.
In this step, the gamma table is preset by a technician according to the screen condition and the requirement, and each gray scale in the gamma table can correspondingly have a determined gamma value for adjusting the display effect of the display screen.
Further, each gray scale segment range corresponds to a gamma value range, wherein the correspondence between the gamma value range and the gray scale segment range is preset, and as shown in fig. 2, determining the gray scale segment range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected includes the following steps:
step S201: comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segmentation range respectively, and determining the gamma value range in which the gamma value of each lamp point to be corrected is located;
specifically, each gray scale segment range corresponds to a gamma value range, in this step, the gamma value (which may be understood as a luminance response under gray scale) of each lamp point to be corrected may be respectively compared with the threshold value (the threshold value of the gamma value range includes a maximum luminance value and a minimum luminance value) of the gamma value range corresponding to each gray scale segment range, so as to determine the gamma value range in which the gamma value of each lamp point to be corrected is located.
Further, the gamma value range corresponding to each gray scale segment range includes a red lamp gamma value range, a green lamp gamma value range and a blue lamp gamma value range, and comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segment range respectively includes:
selecting a gamma value range corresponding to the color of each lamp point to be corrected from the gamma value range of the red lamp, the gamma value range of the green lamp and the gamma value range of the blue lamp as a target gamma value range; and comparing the gamma value of each lamp point to be corrected with the target gamma value range of the lamp point to be corrected in different gray scale segmentation ranges.
That is, if the color of the lamp point to be corrected is red, the gamma value range of the red lamp is taken as the target gamma value range of the lamp point to be corrected, and the gamma values of the lamp point to be corrected are respectively compared with the gamma value ranges of the red lamp corresponding to the different gray scale segmentation ranges.
Step S202: and determining the gray scale segmentation range corresponding to the gamma value range of the gamma value of each lamp point to be corrected as the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected.
Because each gray scale segmentation range has a corresponding gamma value range, when the gamma value range of each lamp point to be corrected is determined, the corresponding gray scale segmentation range can be determined according to the gamma value range.
Step S103: determining and reading the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient;
specifically, in this step, according to the color of the lamp point of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient, the correction coefficient of each lamp point to be corrected is determined and read as follows: and determining a set of correction coefficients according to the gray scale segmentation range of the correction coefficients required by the lamp point to be corrected, and determining and reading the to-be-corrected coefficients of the lamp point to be corrected from the set of determined correction coefficients according to the color of the lamp point to be corrected. Specifically, a set of correction coefficients is determined according to the gray scale segmentation range of the correction coefficients required by the lamp point to be corrected, and actually, the corresponding gamma value range is determined according to the gray scale segmentation range of the correction coefficients required by the lamp point to be corrected, and then the set of correction coefficients corresponding to the gamma value range is determined according to the gamma value range. And determining a correction coefficient corresponding to the gamma value of the lamp point to be corrected from the set of correction coefficients according to the gamma value and the color of the lamp point to be corrected.
Step S104: and correcting the LED display screen according to the correction coefficient of each lamp point to be corrected.
In this embodiment, when the LED display screen is subjected to multi-layer correction, the correction coefficients corresponding to the lamp points are separately stored according to the colors of the lamp points by using each set of correction coefficients subjected to multi-layer correction, and when the lamp points to be subsequently corrected are corrected, only the correction coefficients required by the lamp points to be corrected are read, and other correction coefficients not required are not read, so that the reading efficiency is improved, and the correction efficiency of the LED display screen can be improved. For example, for storing 4 sets of correction coefficients, 1/4 valid data (i.e., one set of coefficients in the 4 sets of correction coefficients) can always be read out, and the total efficiency is 64/74-86% (since SDRAM row stores 256 rows of correction coefficients, only 64 rows of correction coefficients are read at a time, wherein 256 rows of correction coefficients correspond to 256 gray levels), and the efficiency is still at a high level.
In addition, when the correction coefficient of the lamp point to be corrected is read, the correction coefficient of the lamp point to be corrected is determined according to the color of the lamp point to be corrected and the gray scale segmentation range corresponding to the correction coefficient required by the lamp point to be corrected, so that the determined correction coefficient is the correction coefficient which meets the correction requirement of the lamp point to be corrected, and the correction effect can be ensured.
The invention also provides a multilayer correction device for an LED display screen, as shown in FIG. 3, the device comprises: a storage module 501, a gray scale segmentation range determination module 502, a correction coefficient determination module 503, and a correction module 504, wherein:
the storage module 501 is connected with the gray scale segmentation range determination module and is used for storing a plurality of sets of correction coefficients in the receiving card in advance according to a preset storage strategy, wherein each set of correction coefficients corresponds to one gray scale segmentation range; wherein, presetting the storage strategy comprises: for each set of correction coefficients, separately storing the correction coefficients corresponding to the lamp points according to the colors of the lamp points;
a gray scale segment range determining module 502, connected to the correction coefficient determining module 503, configured to obtain a gray scale of each lamp point to be corrected, determine a gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determine a gray scale segment range of a correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected;
the correction coefficient determining module 503 is connected to the correcting module 504, and configured to determine and read the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient;
and the correction module 504 is configured to perform correction processing on the LED display screen according to the correction coefficient of each lamp point to be corrected.
In another embodiment of the present invention, the determining module 502 for determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected includes:
comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segmentation range respectively, and determining the gamma value range in which the gamma value of each lamp point to be corrected is located;
and determining the gray scale segmentation range corresponding to the gamma value range of the gamma value of each lamp point to be corrected as the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected.
According to the LED display screen multilayer correction device provided by the invention, the correction coefficients corresponding to the lamp points are separately stored according to the colors of the lamp points by each set of correction coefficients of the multilayer correction, when the lamp points to be corrected are corrected subsequently, only the correction coefficients required by the lamp points to be corrected are read, and other unnecessary correction coefficients are not read, so that the reading efficiency is improved, and further, the correction efficiency of the LED display screen is improved.
The present invention also provides a computer device 6, as shown in fig. 4, comprising: the processor 601 and the memory 602, the processor 601 and the memory 602 being interconnected and communicating with each other via a communication bus 603 and/or other form of connection mechanism (not shown), the memory 602 storing a computer program executable by the processor 601, the processor 601 executing the computer program when the computing device is running to perform the method in any of the alternative implementations of the embodiments described above.
The invention provides a multilayer correction method, a device and computer equipment for an LED display screen, wherein when the multilayer correction of the LED display screen is carried out, a plurality of sets of correction coefficients in the multilayer correction are stored in advance, the correction coefficients corresponding to lamp points are separately stored according to the colors of the lamp points for each set of correction coefficients, when the lamp points to be corrected are required to be corrected subsequently, the gray scale segmentation range corresponding to the correction coefficient required by the lamp points to be corrected is determined firstly, then the correction coefficient of each lamp point to be corrected is determined and read according to the color of the lamp points to be corrected, and the correction coefficient of each lamp point to be corrected is corrected according to the correction coefficient of each lamp point to be corrected. And then can improve the correction efficiency of LED display screen.
In addition, when the correction coefficient of the lamp point to be corrected is read, the correction coefficient of the lamp point to be corrected is determined according to the color of the lamp point to be corrected and the gray scale segmentation range corresponding to the correction coefficient required by the lamp point to be corrected, so that the determined correction coefficient is the correction coefficient which meets the correction requirement of the lamp point to be corrected, and the correction effect can be ensured.
The terms and expressions used in the specification of the present invention have been set forth for illustrative purposes only and are not meant to be limiting. The terms "first" and "second" used herein in the claims and the description of the present invention are for the purpose of convenience of distinction, have no special meaning, and are not intended to limit the present invention. It will be appreciated by those skilled in the art that changes could be made to the details of the above-described embodiments without departing from the underlying principles thereof. The scope of the invention is, therefore, indicated by the appended claims, in which all terms are intended to be interpreted in their broadest reasonable sense unless otherwise indicated.
Claims (10)
1. A multi-layer correction method for an LED display screen is characterized by comprising the following steps:
storing a plurality of sets of correction coefficients in a receiving card in advance according to a preset storage strategy, wherein each set of correction coefficient corresponds to a gray scale segmentation range; wherein the preset storage strategy comprises: for each set of correction coefficients, separately storing the correction coefficients corresponding to the lamp points according to the colors of the lamp points;
acquiring the gray scale of each lamp point to be corrected, determining the gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected;
determining and reading the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient;
and correcting the LED display screen according to the correction coefficient of each lamp point to be corrected.
2. The multi-layer correction method for the LED display screen according to claim 1, wherein the determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected comprises:
comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segmentation range respectively, and determining the gamma value range in which the gamma value of each lamp point to be corrected is located;
and determining the gray scale segmentation range corresponding to the gamma value range of the gamma value of each lamp point to be corrected as the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected.
3. The multi-layer correction method for the LED display screen according to claim 2, wherein the gamma value range corresponding to each gray scale segment range includes a red lamp gamma value range, a green lamp gamma value range and a blue lamp gamma value range, and the comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segment range respectively comprises:
selecting a gamma value range corresponding to the color of each lamp point to be corrected from the red lamp gamma value range, the green lamp gamma value range and the blue lamp gamma value range as a target gamma value range; and comparing the gamma value of each lamp point to be corrected with the target gamma value range of the lamp point to be corrected in different gray scale segmentation ranges.
4. The multi-layer correction method for the LED display screen according to claim 1, wherein the plurality of sets of correction coefficients stored in the receiving card in advance according to the preset storage strategy are as follows:
and storing a plurality of sets of correction coefficients in a synchronous dynamic random access memory in the receiving card in advance according to a preset storage strategy.
5. The multi-layer correction method for the LED display screen according to claim 1, wherein the preset storage strategy further comprises:
and storing the correction coefficients corresponding to the lamp points of the same lamp point color into a synchronous dynamic random access memory in the receiving card according to the arrangement sequence of the lamp points in the LED display screen.
6. The multi-layer correction method for LED display screen of claim 1, wherein the gray scale segmentation range is preset according to a first segmentation strategy or a second segmentation strategy, wherein:
the first segmentation strategy comprises: acquiring a plurality of preset gray scale threshold values, determining a plurality of gamma value ranges according to the gamma threshold value corresponding to each gray scale threshold value, and taking the gray scale range corresponding to each gamma value range as a preset gray scale segmentation range;
the second segmentation strategy comprises:
the method comprises the steps of obtaining a plurality of preset gray scale threshold values, selecting a target gray scale between two adjacent gray scale threshold values in advance, determining a plurality of target gray scales, determining a plurality of gamma value ranges according to the gamma threshold value corresponding to each target gray scale, and taking the gray scale range corresponding to each gamma value range as a preset gray scale segmentation range.
7. The multi-layer correction method for the LED display screen according to claim 6, wherein the correction coefficients of the target gray scale are obtained according to a preset interpolation processing strategy, wherein the preset interpolation processing strategy comprises:
and determining a correction coefficient corresponding to the target gray scale between two adjacent gray scale threshold values according to the gamma value and the correction coefficient corresponding to the two adjacent gray scale threshold values and the gamma value corresponding to the target gray scale between the two adjacent gray scale threshold values.
8. A multilayer correction device for an LED display screen, the device comprising: the device comprises a storage module, a gray scale segmentation range determining module, a correction coefficient determining module and a correction module, wherein:
the storage module is connected with the gray scale segmentation range determining module and is used for storing a plurality of sets of correction coefficients in a receiving card in advance according to a preset storage strategy, and each set of correction coefficient corresponds to one gray scale segmentation range; wherein the preset storage strategy comprises: for each set of correction coefficients, separately storing the correction coefficients corresponding to the lamp points according to the colors of the lamp points;
the gray scale segmentation range determining module is connected with the correction coefficient determining module and is used for acquiring the gray scale of each lamp point to be corrected, determining the gamma value of each lamp point to be corrected according to the gray scale of each lamp point to be corrected and a preset gamma table, and determining the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected;
the correction coefficient determining module is connected with the correction module and is used for determining and reading the correction coefficient of each lamp point to be corrected according to the lamp point color of each lamp point to be corrected and the gray scale segmentation range of the required correction coefficient;
and the correction module is used for correcting the LED display screen according to the correction coefficient of each lamp point to be corrected.
9. The multi-layer correction device for the LED display screen of claim 8, wherein the gray scale segment range determining module determines the gray scale segment range of the correction coefficient required by each lamp point to be corrected according to the gamma value of each lamp point to be corrected, and comprises:
comparing the gamma value of each lamp point to be corrected with the gamma value range corresponding to each gray scale segmentation range respectively, and determining the gamma value range in which the gamma value of each lamp point to be corrected is located;
and determining the gray scale segmentation range corresponding to the gamma value range of the gamma value of each lamp point to be corrected as the gray scale segmentation range of the correction coefficient required by each lamp point to be corrected.
10. A computer device comprising a memory in which a computer program is stored and a processor which, when executing the computer program, carries out the steps of the LED display screen multilayer correction method according to any one of claims 1 to 7.
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