CN113257183B - Complementary color correction method and device and computer equipment - Google Patents
Complementary color correction method and device and computer equipment Download PDFInfo
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
The invention relates to a complementary color correction method and a device, wherein the method comprises the steps of obtaining a first chrominance correction coefficient of each LED lamp point in an LED display screen, calculating a strategy according to a preset inter-block difference compensation value, and respectively obtaining the compensation value of each IC block in each LED module; respectively compensating the first chrominance correction coefficient corresponding to each IC block by using the compensation value of each IC block to obtain a second chrominance correction coefficient of each LED lamp point in the LED display screen; acquiring a brightness correction coefficient of each LED lamp point in the LED display screen, and fusing the brightness correction coefficient corresponding to each LED lamp point in the LED display screen with a second chromaticity correction coefficient according to a preset brightness and chromaticity fusion strategy to obtain a brightness and chromaticity correction coefficient; and sending the brightness and chrominance correction coefficient to the LED display screen. The method and the device provided by the invention can effectively improve the chromaticity uniformity of the LED display screen and improve the correction effect.
Description
Technical Field
The invention relates to the field of display screen correction, in particular to a complementary color correction method and device and computer equipment.
Background
In the prior art, a Chip On Board (COB) display screen needs to be subjected to complementary color correction, two main chromaticity deviations exist in the actual measurement process of complementary color correction, firstly, when the display screen is subjected to block correction, the difference between each block is far higher than the difference in the block, and when the correction is performed, the difference between the blocks cannot be ideally eliminated by an actual compensation value; secondly, in the chromaticity correction, the chromaticity uniformity is reduced due to the system error caused by an ideal model of the chromaticity correction, and particularly the chromaticity uniformity of a blue channel in a monochromatic channel is reduced; the above problem will directly affect the correction effect of the COB display screen. Therefore, there is a need to find a new technical solution to solve the above problems.
Disclosure of Invention
The invention provides a complementary color correction method, a complementary color correction device and computer equipment, which are used for eliminating differences among blocks and solving the problem of non-uniform chromaticity.
The complementary color correction method comprises the following steps: the method comprises the steps of obtaining a first chromaticity correction coefficient of each LED lamp point in an LED display screen, wherein the LED display screen comprises a plurality of LED modules, and each LED module comprises a plurality of IC blocks; respectively obtaining the compensation value of each IC block in each LED module according to a preset inter-block difference compensation value calculation strategy; respectively compensating the first chrominance correction coefficient corresponding to each IC block by using the compensation value of each IC block to obtain a second chrominance correction coefficient of each LED lamp point in the LED display screen; acquiring a brightness correction coefficient of each LED lamp point in the LED display screen, and fusing the brightness correction coefficient corresponding to each LED lamp point in the LED display screen with a second chromaticity correction coefficient according to a preset brightness and chromaticity fusion strategy to obtain a brightness and chromaticity correction coefficient; and sending the brightness and chrominance correction coefficient to the LED display screen for correcting the LED display screen.
Further, the inter-block difference compensation value calculation strategy comprises: calculating a global mean value corresponding to each LED module and a mean value of each IC block, wherein the global mean value is a mean value of first chrominance correction coefficients of each LED lamp point in the LED module, and the mean value of the IC blocks is a mean value of the first chrominance correction coefficients of each LED lamp point in the IC block; acquiring the intensity coefficient of each IC block, wherein the intensity coefficient is preset by a user according to the correction requirement of an LED display screen; and obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value.
Further, obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block, and the IC block average value includes: substituting the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value into a preset compensation value calculation formula to calculate the compensation value of each IC block in each LED module; the compensation value calculation formula is as follows: offset value = (global mean-IC block mean) intensity coefficient.
Furthermore, each LED lamp point comprises three color channels, and each color channel corresponds to one main channel and two sub-channels; calculating the average value of the IC blocks comprises accumulating the primary channel first chrominance correction coefficient and the secondary channel first chrominance correction coefficient corresponding to each color channel in the IC blocks aiming at each IC block, and calculating the average value; calculating the global mean value includes, for each LED module, accumulating the primary channel first chrominance correction coefficient and the secondary channel first chrominance correction coefficient corresponding to each color channel in the LED module, and calculating the mean value.
Further, the luminance and chrominance fusion strategy comprises: acquiring a preset adjusting proportion, wherein the adjusting proportion comprises a main channel proportion and a complementary color channel proportion;
calculating a strategy and an adjustment proportion according to a preset channel coefficient, and calculating a brightness correction coefficient and a second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen to obtain a channel coefficient corresponding to each LED lamp point, wherein the channel coefficient comprises a main channel coefficient and a secondary channel coefficient; and taking the channel coefficient corresponding to each LED lamp point as a brightness and chrominance correction coefficient corresponding to each LED lamp point.
Furthermore, each LED lamp point comprises three color channels, each color channel corresponds to one main channel and two sub-channels, and the second chromaticity correction coefficient corresponding to each LED lamp point comprises a main channel chromaticity correction coefficient and a sub-channel chromaticity correction coefficient corresponding to each color channel in each LED lamp point; the preset channel coefficient calculation strategy is as follows: calculating a main channel coefficient and a sub channel coefficient corresponding to each color channel in each LED lamp point according to a preset main channel coefficient calculation formula and a preset sub channel coefficient calculation formula, wherein: the main channel coefficient calculation formula is as follows: main channel coefficient = luminance correction coefficient + main channel ratio + (1-main channel ratio) main channel second chrominance correction coefficient; the secondary channel coefficient calculation formula is as follows: sub-channel coefficient = complement channel ratio secondary chrominance correction coefficient.
The invention also provides a complementary color correction device, which comprises a first chrominance correction coefficient acquisition module, an inter-block difference compensation value acquisition module, an inter-block difference compensation module, a luminance and chrominance fusion module and a correction coefficient sending module, wherein: the first chrominance correction coefficient acquisition module is connected with the inter-block difference compensation value acquisition module and used for acquiring a first chrominance correction coefficient of each LED lamp point in the LED display screen, the LED display screen comprises a plurality of LED modules, and each LED module comprises a plurality of IC sub-blocks; the inter-block difference compensation value acquisition module is connected with the inter-block difference compensation module and is used for respectively acquiring the compensation value of each IC block in the LED module according to a preset inter-block difference compensation strategy; the inter-block difference compensation module is connected with the brightness and chrominance fusion module and used for respectively compensating the first chrominance correction coefficient corresponding to each IC block by using the compensation value of each IC block to obtain a second chrominance correction coefficient of each LED lamp point in the LED display screen; the brightness and chrominance fusion module is connected with the correction coefficient sending module and used for fusing the brightness correction coefficient and the second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen according to a preset brightness and chrominance fusion strategy to obtain a brightness and chrominance correction coefficient; and the correction coefficient sending module is used for sending the brightness and chrominance correction coefficient to the LED display screen so as to correct the LED display screen.
Further, the inter-block difference compensation value obtaining module comprises a global mean value calculating unit, an LED module mean value calculating unit and a compensation value calculating unit, wherein: the global mean value calculation unit is connected with the compensation value calculation unit and used for calculating a global mean value corresponding to each LED module, and the global mean value is a mean value of first chrominance correction coefficients of all LED lamp points in the LED module; the IC block mean value calculating unit is connected with the compensation value calculating unit and used for calculating the mean value of each IC block corresponding to each LED module, and the IC block mean value is the mean value of the first chrominance correction coefficient of each LED lamp point in the IC block; the compensation value calculating unit is used for acquiring the intensity coefficient of each IC block, and the intensity coefficient is preset by a user according to the correction requirement of the LED display screen; and obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value.
Further, the luminance and chrominance fusion module comprises an adjustment proportion obtaining unit and a luminance and chrominance fusion unit, wherein: the adjustment ratio acquiring unit is connected with the brightness and chrominance fusion unit and used for acquiring a preset adjustment ratio, and the adjustment ratio comprises a main channel ratio and a complementary color channel ratio; and the brightness and chrominance fusion unit is used for calculating and obtaining the channel coefficient corresponding to each LED lamp point according to a preset channel coefficient calculation strategy, an adjustment proportion, and a brightness correction coefficient and a second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen, wherein the channel coefficient comprises a main channel coefficient and a secondary channel coefficient, and the channel coefficient corresponding to each LED lamp point is used as the brightness and chrominance correction coefficient corresponding to each LED lamp point.
The invention also provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the complementary color correction method when executing the computer program.
The complementary color correction method, the complementary color correction device and the computer equipment provided by the invention at least have the following beneficial effects: during correction, the LED module is divided into a plurality of IC blocks, after a first chromaticity correction coefficient is calculated, a compensation value of each IC block is calculated by taking the IC block as a unit, the first chromaticity correction coefficient is adjusted to obtain a second chromaticity correction coefficient, further, after the second chromaticity correction coefficient is obtained, the brightness correction coefficient and the compensated second chromaticity correction coefficient are fused according to a preset adjustment proportion, the second chromaticity correction coefficient is further adjusted to obtain a brightness correction coefficient, and the brightness correction coefficient is used for carrying out chromaticity correction on the display screen, so that chromaticity difference among the IC blocks is eliminated, errors in chromaticity correction operation can be compensated, chromaticity uniformity is further improved, and the display effect of the LED display screen is further improved.
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 a complementary color correction method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for calculating an inter-block difference compensation value according to an embodiment of the present invention;
FIG. 3 is a flowchart of a luminance and chrominance fusion method according to an embodiment of the present invention;
FIG. 4 is a schematic view of an adjustment interface in an embodiment of the invention;
FIG. 5 is a schematic diagram of an exemplary embodiment of a complementary color correction apparatus;
FIG. 6 is a block diagram of an exemplary block-to-block difference compensation value obtaining module according to the present invention;
FIG. 7 is a diagram illustrating a luminance and chrominance fusion module according to an embodiment of the present invention;
401-a first chrominance correction coefficient acquisition module, 402-an inter-block difference compensation value acquisition module, 403-an inter-block difference compensation module, 404-a luminance fusion module, 405-a correction coefficient sending module, 4021-a global mean value calculation unit, 4022-an IC block mean value calculation unit, 4023-a compensation value calculation unit, 4041-an adjustment proportion acquisition unit and 4042-a luminance fusion unit.
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, as shown in fig. 1, a complementary color correction method is disclosed, specifically, the method includes the following steps:
step S101: and acquiring a first chrominance correction coefficient of each LED lamp point in the LED display screen.
The LED display screen comprises a plurality of LED modules, each LED module comprises a plurality of IC sub-blocks, and each IC sub-block comprises a plurality of LED lamp points.
Specifically, each LED module is provided with an IC chip for driving an LED lamp, in this embodiment, a display area with any area in a maximum display area controlled by the IC chip is used as an IC block, where the maximum display area controlled by the IC chip is the entire LED module. More specifically, the size of the IC block may be set by a technician when performing block correction on the LED module, which is not limited by the invention.
More specifically, in this embodiment, the first chromaticity correction coefficient of each LED lamp point may be obtained by using an existing chromaticity correction coefficient calculation method, which is not limited in this embodiment, and in the specific implementation, a technician may select an appropriate calculation method according to the correction requirement.
Step S102: and respectively obtaining the compensation value of each IC block in each LED module according to a preset inter-block difference compensation value calculation strategy.
As shown in fig. 2, in one implementation, the inter-block difference compensation value calculation strategy includes the following steps:
step S1021: and calculating the global average value corresponding to each LED module and the block average value of each IC.
Specifically, the global mean value is a mean value of the first chromaticity correction coefficients of the LED light points in the LED module, and since the first chromaticity correction coefficients of the LED light points in the LED display screen are obtained in step S101, the LED light points in the LED display screen may be grouped by using the LED module as a unit, and the mean value of the first chromaticity correction coefficients of the LED light points in each LED module is calculated respectively.
More specifically, the IC block mean value is a mean value of the first chrominance correction coefficients of the LED lights in the IC block, and each LED module is divided into a plurality of IC blocks during the correction, so that the LED lights in the LED modules may be further grouped by taking the IC block as a unit during the calculation of the IC block mean value, and then the mean value of the first chrominance correction coefficients of the LED lights in the IC block may be counted.
Specifically, assuming that the width of a screen body corresponding to one LED display screen is tolalWidth and the height of the screen body is totalHeight; the width corresponding to the IC sub-block is moduleWidth, the height corresponding to the IC sub-block is moduleHeight, and the order (i, j) represents the position of the IC sub-block in the LED display screen.
For example, assuming that the initial value of i, j is 0, (0, 0) represents the IC block at the first column position of the first row. The process of calculating the mean value of each IC block is:
step S10211: judging whether i is smaller than totalHeight/moduleHeight, if yes, executing step S10212, and if not, executing step S10215;
step S10212: and judging whether j is smaller than tolalWidth/moduleWidth, if so, executing step S10213, and otherwise, executing step S10214.
Step S10213: an IC block mean value of the IC block at the (i, j) position is calculated, and the process returns to step S10212 after j = j + +.
Step S10214: let i = i + +, step S10211 is performed.
Step S10215: step S1023 is executed.
Through the steps, the IC block mean value of all IC blocks in the LED display screen can be obtained.
Step S1022: the intensity factor of each IC tile is obtained.
Specifically, the intensity coefficient is preset by a user according to the correction requirement of the LED display screen. In the actual correction process, after the first chromaticity correction coefficient of each LED lamp point in the LED display screen is obtained, the LED display screen may be corrected according to the first chromaticity correction coefficient, and the user sets the intensity coefficients of the IC blocks one by one according to the screen effect of the corrected LED display screen.
Step S1023: and obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value.
Specifically, the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value are substituted into a preset compensation value calculation formula, and the compensation value of each IC block in each LED module is calculated;
the compensation value calculation formula is as follows: offset value = (global mean-IC block mean) intensity coefficient.
Step S103: and respectively compensating the first chrominance correction coefficient corresponding to each IC block by using the compensation value of each IC block to obtain a second chrominance correction coefficient of each LED lamp point in the LED display screen.
Specifically, each IC segment has a compensation value corresponding thereto, and when the IC segment is compensated, all the first chromaticity correction coefficients corresponding to the IC segment are added to the compensation value, that is, the first chromaticity correction coefficients of each LED lamp in the IC segment are synchronously adjusted, so that the difference of the first chromaticity correction coefficients of each LED lamp in the IC segment is kept constant, and the chromaticity difference between the IC segments is reduced while the uniformity of chromaticity in the IC segment is ensured.
Specifically, assuming that the width of a screen body corresponding to one LED display screen is tolalWidth and the height of the screen body is totalHeight; the width corresponding to the IC sub-block is moduleWidth, the height corresponding to the IC sub-block is moduleHeight, and the order (i, j) represents the position of the IC sub-block in the LED display screen.
Assuming that the initial value of i, j is 0, (0, 0) represents the IC block at the first row and first column position. The process of calculating the second chromaticity correction coefficient is:
step S1031: judging whether i is less than totalHeight/moduleHeight, if so, executing step S1032, otherwise, executing step S1035;
step S1032: and judging whether j is smaller than tolalWidth/moduleWidth, if so, executing the step S1033, and otherwise, executing the step S1034.
Step S1033: superimposing the IC patch compensation value of the IC patch at the (i, j) position on each first chrominance correction coefficient in the IC patch at the (i, j) position to obtain a second chrominance correction coefficient, and returning to step S1032 after making j = j + +;
step S1034: let i = i + +, step S1031 is executed.
Step S1035: and outputting the second chroma correction coefficient.
Step S104: and acquiring the brightness correction coefficient of each LED lamp point in the LED display screen, and fusing the brightness correction coefficient corresponding to each LED lamp point in the LED display screen with the second chromaticity correction coefficient according to a preset brightness and chromaticity fusion strategy to obtain the brightness and chromaticity correction coefficient.
Specifically, in this embodiment, the brightness correction coefficient of each LED lamp point in the LED display screen may be obtained by using a point-by-point Gamma correction calculation method, and of course, may also be obtained by using other existing calculation methods, which is not limited in this invention.
In this embodiment, by using a method of fusing luminance and chrominance, a ratio of the luminance correction coefficient to the second chrominance correction coefficient is adjusted to form a luminance and chrominance correction coefficient, and the luminance and chrominance correction coefficient is used to perform chrominance correction on the LED display screen, so that on one hand, a difference between IC blocks can be eliminated, and on the other hand, the problem of uneven chrominance caused by a system error in the chrominance correction is also solved. Furthermore, the luminance and chrominance correction coefficient is used for carrying out chrominance correction on the LED display screen, and the problem of uneven white caused by system errors in luminance correction can be solved. In addition, when the brightness and the chrominance are fused, the brightness correction coefficient and the chrominance correction coefficient of the main channel and the secondary channel of each color channel are fused, so that the problem of the reduction of the chrominance uniformity of a single-color channel, particularly a blue channel, is solved.
More specifically, in one implementation, as shown in fig. 3, the luminance and chrominance fusion strategy includes the following steps:
step S1041: and acquiring a preset adjusting proportion.
Specifically, in this embodiment, the adjustment ratio includes a main channel ratio and a complementary color channel ratio.
Step S1042: and calculating a strategy and an adjustment proportion according to a preset channel coefficient, and calculating a brightness correction coefficient and a second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen to obtain the channel coefficient corresponding to each LED lamp point.
Specifically, the channel coefficients include a primary channel coefficient and a secondary channel coefficient.
More specifically, each LED light point includes three color channels, which are a red channel, a green channel, and a blue channel, respectively, and each color channel corresponds to one main channel and two sub-channels. The second chromaticity correction coefficient corresponding to each LED lamp point comprises a main channel chromaticity correction coefficient and a secondary channel chromaticity correction coefficient corresponding to each color channel in each LED lamp point;
the preset channel coefficient calculation strategy is as follows: and calculating the main channel coefficient and the sub-channel coefficient corresponding to each color channel in each LED lamp point according to a preset main channel coefficient calculation formula and a preset sub-channel coefficient calculation formula.
The main channel coefficient calculation formula is as follows: main channel coefficient = luminance correction coefficient + main channel ratio + (1-main channel ratio) main channel second chrominance correction coefficient;
the secondary channel coefficient calculation formula is as follows: sub-channel coefficient = complement channel ratio secondary chrominance correction coefficient.
Specifically, assuming that the width of a screen body corresponding to one LED display screen is tolalWidth and the height of the screen body is totalHeight, let (m, n) represent the position of each LED lamp point in the LED display screen.
Assuming that the initial values of m and n are both 0, (0, 0) represents the LED lamp point at the first row and the first column, and the process of calculating the channel coefficient is as follows:
step S10421: judging whether m is smaller than totalHeight, if so, executing a step S10422, otherwise, executing a step S10425;
step S10422: and judging whether n is smaller than tolalWidth, if so, executing the step S10423, otherwise, executing the step S10424.
Step S10423: calculating a main channel coefficient and a sub channel coefficient of the LED lamp point at the position of (i, j), and returning to the step S10422 after n = n + +;
step S10424: let m = m + +, step S10421 is performed.
Step S10425: and outputting the channel coefficients corresponding to the LED lamp points.
Step S1043: and taking the channel coefficient corresponding to each LED lamp point as a brightness and chrominance correction coefficient corresponding to each LED lamp point.
Specifically, as shown in table 1, the table is a table of channel coefficients for luminance and chrominance fusion, where rr represents a red main channel and pure red (target), rg and rb represent red sub-channels, which respectively represent green in red and blue in red (non-target), gg represents a green main channel, gr and gb represent green sub-channels, bb represents a blue main channel, and br and bg represent blue sub-channels. A main channel of 0.5 indicates a main channel ratio of 0.5 and a complementary color channel of 0.8 indicates a complementary color channel ratio of 0.8.
TABLE 1 channel coefficient table for fusion of lightness and chroma
During fusion, according to the main channel proportion, the complementary color channel proportion, and a preset main channel coefficient calculation formula and a preset sub-channel coefficient calculation formula, the brightness correction coefficient and the chroma correction coefficient corresponding to the main channel and the sub-channel of each color channel are respectively fused, and the main channel coefficient and the sub-channel coefficient of each color channel are calculated. Taking the red channel as an example, the red main channel coefficient is the value corresponding to the final composite row and rr column in table 1, and the red sub-channel coefficient is the value corresponding to the final composite row, rg column, and rb column in table 1.
And the main channel coefficient and the secondary channel coefficient of each color channel are fused by the brightness and chrominance coefficient. Therefore, the uniformity of the single-color channel is improved, and the integral correction effect of the display screen is further improved.
Further, as shown in fig. 4, when the user sets the adjustment ratio on the terminal interface, the white uniformity and the chromaticity compensation of the terminal interface can be adjusted, where the white uniformity corresponds to the main channel ratio, the chromaticity compensation corresponds to the complementary color channel ratio, when both the white uniformity and the chromaticity compensation are set to 100%, the white uniformity and the chromaticity compensation are pure chromaticity correction, and when both the white uniformity and the chromaticity compensation are set to 0, the white uniformity and the chromaticity compensation are luminance correction. The patch intensities correspond to intensity coefficients in the IC patch compensation.
Step S105: and sending the brightness correction coefficient and the second chromaticity correction coefficient to the LED display screen for correcting the LED display screen.
Specifically, in this step, the luminance and chrominance correction coefficient is sent to a receiving card of the LED display screen, and the receiving card controls the LED display screen to correct according to the luminance and chrominance correction coefficient.
In the complementary color correction method provided in this embodiment, after the first chromaticity correction coefficient of each LED lamp point in the LED display screen is obtained, inter-block difference compensation is performed to obtain the second chromaticity correction coefficient of each LED lamp point in the LED display screen, and chromaticity correction is performed on the display screen by using the second chromaticity correction coefficient, so that inter-block chromaticity difference between IC blocks is reduced, and the chromaticity uniformity of the whole LED display screen is improved.
And then obtaining the brightness correction coefficient of each LED lamp point in the LED display screen, fusing the second chromaticity correction coefficient corresponding to each LED lamp point with the brightness correction coefficient, adjusting the second chromaticity correction coefficient to obtain a brightness correction coefficient, and correcting by adopting the final brightness correction coefficient, so that the inter-block chromaticity difference between IC blocks can be solved, the problem of chromaticity uniformity reduction caused by system errors in chromaticity correction can be solved, and the chromaticity uniformity is improved. Meanwhile, the luminance and chrominance correction coefficient is utilized to carry out chrominance correction on the LED display screen, the uniformity of white chrominance can be improved, the problem that the white uniformity is reduced due to system errors in luminance correction is solved, and the correction effect of the display screen is further improved.
In yet another embodiment of the present invention, each LED light point includes three color channels, one primary channel and two secondary channels for each color channel.
The calculating the IC block mean value includes: and accumulating the primary channel first chrominance correction coefficient and the secondary channel first chrominance correction coefficient corresponding to each color channel in the IC blocks aiming at each IC block, and calculating an average value.
Calculating the global mean includes: and accumulating the primary channel first chrominance correction coefficient and the secondary channel first chrominance correction coefficient corresponding to each color channel in the LED module aiming at each LED module, and calculating the average value.
In an embodiment of the present invention, as shown in fig. 5, there is further provided a complementary color correction apparatus, which includes a first chrominance correction coefficient obtaining module 401, an inter-block difference compensation value obtaining module 402, an inter-block difference compensation module 403, a luminance and chrominance fusion module 404, and a correction coefficient sending module 405, wherein:
a first chrominance correction coefficient obtaining module 401 connected to the inter-block difference compensation value obtaining module 402, configured to obtain a first chrominance correction coefficient of each LED lamp point in an LED display screen, where the LED display screen includes a plurality of LED modules, and each LED module includes a plurality of IC sub-blocks;
an inter-block difference compensation value obtaining module 402, connected to the inter-block difference compensation module 403, for obtaining the compensation value of each IC block in each LED module according to a preset inter-block difference compensation value calculation strategy;
the inter-block difference compensation module 403 is connected to the luminance and chrominance fusion module 404, and is configured to compensate the first chrominance correction coefficient corresponding to each IC block by using the compensation value of each IC block, respectively, to obtain a second chrominance correction coefficient of each LED lamp in the LED display screen;
the brightness and chrominance fusion module 404 is connected to the correction coefficient sending module 405, and is configured to fuse, according to a preset brightness and chrominance fusion strategy, a brightness correction coefficient corresponding to each LED lamp point in the LED display screen with a second chrominance correction coefficient to obtain a brightness and chrominance correction coefficient;
and a correction coefficient sending module 405, configured to send the luminance and chrominance correction coefficient and the second correction coefficient to the LED display screen, so as to correct the LED display screen.
In another embodiment of the present invention, as shown in fig. 6, the inter-block difference compensation value obtaining module 402 includes a global mean value calculating unit 4021, an IC block mean value calculating unit 4022, and a compensation value calculating unit 4023, where:
the global mean value calculating unit 4021 is connected with the compensation value calculating unit 4023 and is used for calculating a global mean value corresponding to each LED module, wherein the global mean value is a mean value of first chrominance correction coefficients of each LED lamp point in each LED module;
the IC block mean value calculating unit 4022 is connected to the compensation value calculating unit 4023 and configured to calculate a mean value of each IC block corresponding to each LED module, where the IC block mean value is a mean value of a first chrominance correction coefficient of each LED lamp in the IC block;
the compensation value calculating unit 4023 acquires an intensity coefficient of each IC block, wherein the intensity coefficient is preset by a user according to the correction requirement of the LED display screen; and obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value.
In another embodiment of the present invention, as shown in fig. 7, the luminance and chrominance fusion module 404 includes an adjustment ratio obtaining unit 4041 and a luminance and chrominance fusion unit 4042, where:
the adjustment ratio obtaining unit 4041 is connected to the brightness and chrominance fusion unit 4042, and is configured to obtain a preset adjustment ratio, where the adjustment ratio includes a main channel ratio and a complementary color channel ratio;
and the brightness and chrominance fusion unit 4042 is configured to calculate a channel coefficient corresponding to each LED lamp point according to a preset channel coefficient calculation strategy, an adjustment ratio, and a brightness correction coefficient and a second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen, where the channel coefficient includes a main channel coefficient and a complementary color channel coefficient, and the channel coefficient corresponding to each LED lamp point is used as the brightness and chrominance correction coefficient corresponding to each LED lamp point.
In another embodiment of the present invention, a computer device is further provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the complementary color correction method when executing the computer program.
According to the complementary color correction method, the complementary color correction device and the computer equipment, when complementary color correction is carried out, corresponding compensation values are obtained for all IC blocks of an LED module, unified correction coefficient adjustment is carried out on the whole of each IC block according to the compensation values, the original first chromaticity correction coefficient is adjusted to be the second chromaticity correction coefficient, so that chromaticity deviation among the IC blocks is eliminated, and chromaticity uniformity of a display screen is improved. And further, when the chromaticity correction coefficient is fused with the brightness correction coefficient, the chromaticity correction coefficient and the brightness correction coefficient of each color channel are fused, so that the problem of chromaticity uniformity reduction caused by system errors in chromaticity correction is solved, the integral chromaticity uniformity is improved, and the problem of chromaticity uniformity reduction of a single color channel, particularly the chromaticity uniformity reduction of a blue color channel, is effectively solved. And the brightness and chroma correction coefficient is used for carrying out chroma correction, errors in the brightness correction operation can be made up, and the problem of uneven white caused by the errors in the brightness adjustment is solved.
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 method of complementary color correction, the method comprising:
the method comprises the steps of obtaining a first chrominance correction coefficient of each LED lamp point in an LED display screen, wherein the LED display screen comprises a plurality of LED modules, and each LED module comprises a plurality of IC sub-blocks;
calculating a strategy according to a preset inter-block difference compensation value, and respectively obtaining the compensation value of each IC block in each LED module;
respectively compensating the first chrominance correction coefficient corresponding to each IC block by using the compensation value of each IC block to obtain a second chrominance correction coefficient of each LED lamp point in the LED display screen;
acquiring a brightness correction coefficient of each LED lamp point in the LED display screen, and fusing the brightness correction coefficient corresponding to each LED lamp point in the LED display screen with a second chromaticity correction coefficient according to a preset brightness and chromaticity fusion strategy to obtain a brightness and chromaticity correction coefficient;
and sending the brightness and chrominance correction coefficient to the LED display screen for correcting the LED display screen.
2. The complementary color correction method according to claim 1, wherein the inter-block difference compensation value calculation strategy comprises:
calculating a global mean value corresponding to each LED module and a mean value of each IC block, wherein the global mean value is a mean value of first chrominance correction coefficients of each LED lamp point in the LED module, and the mean value of the IC blocks is a mean value of the first chrominance correction coefficients of each LED lamp point in the IC block;
acquiring an intensity coefficient of each IC block, wherein the intensity coefficient is preset by a user according to the correction requirement of an LED display screen;
and obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value.
3. The complementary color correction method according to claim 2, wherein the obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block, and the IC block average value comprises:
substituting the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value into a preset compensation value calculation formula to calculate the compensation value of each IC block in each LED module;
the compensation value calculation formula is as follows: offset value = (global mean-IC block mean) intensity coefficient.
4. The complementary color correction method of claim 2, wherein each LED light point comprises three color channels, one primary channel and two secondary channels for each color channel;
calculating the IC block mean includes: accumulating the primary channel first chrominance correction coefficient and the secondary channel first chrominance correction coefficient corresponding to each color channel in each IC block, and calculating an average value;
calculating the global mean value comprises accumulating the primary channel first chrominance correction coefficient and the secondary channel first chrominance correction coefficient corresponding to each color channel in each LED module and calculating the mean value.
5. The complementary color correction method according to claim 1, wherein the luminance and chrominance fusion strategy comprises:
acquiring a preset adjustment proportion, wherein the adjustment proportion comprises a main channel proportion and a complementary color channel proportion;
calculating a strategy and an adjustment proportion according to a preset channel coefficient, and calculating a brightness correction coefficient and a second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen to obtain a channel coefficient corresponding to each LED lamp point, wherein the channel coefficient comprises a main channel coefficient and a secondary channel coefficient;
and taking the channel coefficient corresponding to each LED lamp point as a brightness and chrominance correction coefficient corresponding to each LED lamp point.
6. The complementary color correction method of claim 5, wherein each LED light point comprises three color channels, one primary channel and two secondary channels for each color channel, and the second chrominance correction factor for each LED light point comprises a primary channel chrominance correction factor and a secondary channel chrominance correction factor for each color channel in each LED light point;
the preset channel coefficient calculation strategy is as follows:
calculating a main channel coefficient and a sub channel coefficient corresponding to each color channel in each LED lamp point according to a preset main channel coefficient calculation formula and a preset sub channel coefficient calculation formula, wherein:
the main channel coefficient calculation formula is as follows: main channel coefficient = luminance correction coefficient + main channel ratio + (1-main channel ratio) main channel second chrominance correction coefficient;
the secondary channel coefficient calculation formula is as follows: sub-channel coefficient = complement channel ratio secondary chrominance correction coefficient.
7. The complementary color correction device is characterized by comprising a first chrominance correction coefficient acquisition module, an inter-block difference compensation value acquisition module, an inter-block difference compensation module, a luminance and chrominance fusion module and a correction coefficient sending module, wherein:
the first chrominance correction coefficient acquisition module is connected with the inter-block difference compensation value acquisition module and used for acquiring a first chrominance correction coefficient of each LED lamp point in the LED display screen, the LED display screen comprises a plurality of LED modules, and each LED module comprises a plurality of IC sub-blocks;
the inter-block difference compensation value acquisition module is connected with the inter-block difference compensation module and used for respectively acquiring the compensation value of each IC block in each LED module according to a preset inter-block difference compensation value calculation strategy;
the inter-block difference compensation module is connected with the bright-chroma fusion module and is used for respectively compensating the first chroma correction coefficient corresponding to each IC block by using the compensation value of each IC block to obtain a second chroma correction coefficient of each LED lamp point in the LED display screen;
the brightness and chrominance fusion module is connected with the correction coefficient sending module and used for fusing the brightness correction coefficient corresponding to each LED lamp point in the LED display screen with the second chrominance correction coefficient according to a preset brightness and chrominance fusion strategy to obtain a brightness and chrominance correction coefficient;
and the correction coefficient sending module is used for sending the brightness and chrominance correction coefficient to the LED display screen so as to correct the LED display screen.
8. The complementary color correction device according to claim 7, wherein the inter-block difference compensation value acquisition module includes a global mean calculation unit, an IC block mean calculation unit, and a compensation value calculation unit, wherein:
the global mean value calculating unit is connected with the compensation value calculating unit and used for calculating a global mean value corresponding to each LED module, and the global mean value is a mean value of first chrominance correction coefficients of all LED lamp points in the LED module;
the IC block mean value calculating unit is connected with the compensation value calculating unit and used for calculating each IC block mean value corresponding to each LED module, and the IC block mean value is the mean value of the first chrominance correction coefficient of each LED lamp point in the IC block;
the compensation value calculating unit is used for acquiring the intensity coefficient of each IC block, and the intensity coefficient is preset by a user according to the correction requirement of the LED display screen; and obtaining the compensation value of each IC block in each LED module according to the global average value corresponding to each LED module, the intensity coefficient of each IC block and the IC block average value.
9. The complementary color correction device of claim 7, wherein the luminance and chrominance fusion module comprises an adjustment ratio obtaining unit and a luminance and chrominance fusion unit, wherein:
the adjustment ratio acquiring unit is connected with the brightness and chrominance fusion unit and used for acquiring a preset adjustment ratio, wherein the adjustment ratio comprises a main channel ratio and a complementary color channel ratio;
the brightness and chrominance fusion unit is used for calculating and obtaining the channel coefficient corresponding to each LED lamp point according to a preset channel coefficient calculation strategy, an adjustment proportion, and a brightness correction coefficient and a second chrominance correction coefficient corresponding to each LED lamp point in the LED display screen, wherein the channel coefficient comprises a main channel coefficient and a secondary channel coefficient, and the channel coefficient corresponding to each LED lamp point is used as the brightness and chrominance correction coefficient corresponding to each LED lamp point.
10. A computer device comprising a memory in which a computer program is stored and a processor which, when executing the computer program, realizes the complementary color correction method steps of any one of claims 1 to 6.
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