WO2023036079A1 - 伽马校正方法及装置、显示装置、存储介质 - Google Patents

伽马校正方法及装置、显示装置、存储介质 Download PDF

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WO2023036079A1
WO2023036079A1 PCT/CN2022/117021 CN2022117021W WO2023036079A1 WO 2023036079 A1 WO2023036079 A1 WO 2023036079A1 CN 2022117021 W CN2022117021 W CN 2022117021W WO 2023036079 A1 WO2023036079 A1 WO 2023036079A1
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brightness
gamma
value
luminance
gamma correction
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PCT/CN2022/117021
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English (en)
French (fr)
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齐二龙
王祖亮
童华南
赵旭飞
贾丽
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重庆康佳光电技术研究院有限公司
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Publication of WO2023036079A1 publication Critical patent/WO2023036079A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a gamma correction method and device, a display device, and a storage medium.
  • LED Light Emitting Diode
  • a gamma correction method and device a display device, and a storage medium are provided.
  • one aspect of the present disclosure provides a gamma correction method, including the following steps.
  • the brightness display range is divided into a plurality of brightness regions.
  • Gamma correction is performed on the brightness regions one by one, so that each brightness region has at least one gamma coefficient.
  • the gamma correction method further includes the following steps.
  • a transition zone is defined between any two adjacent luminance zones.
  • the gamma coefficient corresponding to the transition region is determined.
  • determining a transition region between any two adjacent brightness regions includes the following steps.
  • the brightness value obtained by reducing the reference value by the first value is used as the minimum brightness value of the transition area.
  • the brightness value obtained by adding the second numerical value to the reference value is used as the maximum brightness value of the transition area.
  • the first value and the second value are the same.
  • the gamma coefficient corresponding to the second brightness region is smaller than the gamma coefficient corresponding to the first brightness region.
  • the transition region includes a plurality of luminance values.
  • the determining the gamma coefficient corresponding to the transition region according to the gamma coefficients corresponding to two adjacent brightness regions includes: determining the gamma coefficient corresponding to each brightness value in the transition region.
  • the gamma coefficient corresponding to the target brightness value in the transition region satisfies the following formula:
  • Gamma T is the gamma coefficient corresponding to the target luminance value in the transition area
  • Gamma1 is the gamma coefficient corresponding to the first luminance area
  • Gamma2 is the gamma coefficient corresponding to the second luminance area
  • L is the target luminance value to the reference The interval span of the value.
  • dividing the brightness display range into a plurality of brightness regions includes: dividing the brightness display range into a plurality of brightness regions.
  • dividing the brightness display range into a plurality of brightness regions includes: dividing the brightness display range into a plurality of brightness regions in such a manner that the value range of brightness values is a geometric sequence.
  • performing gamma correction on brightness regions one by one further includes the following steps.
  • the brightness of the frame image to be displayed on the display device and the ambient brightness are acquired.
  • gamma correction is performed on the brightness area based on a preset gamma coefficient; wherein, the preset gamma coefficients corresponding to different brightness areas are different.
  • the ambient brightness is less than or equal to the first preset ambient brightness.
  • the brightness of the frame image to be displayed is less than or equal to the brightness of the first preset image.
  • the preset gamma coefficient corresponding to the low brightness brightness area is greater than Gamma2.8, and the preset gamma coefficient corresponding to the medium and high brightness brightness area is less than or equal to Gamma2.8.
  • the ambient brightness is greater than a second preset ambient brightness.
  • the brightness of the low-brightness brightness area is smaller than the preset display brightness, and the preset gamma factor corresponding to the low-brightness brightness area is smaller than Gamma2.8.
  • each of the brightness regions corresponds to at least one gamma coefficient, and also includes at least one of the following schemes:
  • Solution 2 The same brightness region corresponds to different gamma coefficients under different display conditions.
  • a gamma correction device including: a memory and a processor.
  • the memory is configured to store program instructions.
  • the processor is configured to run the program instructions to obtain the brightness display range of the display device, divide the brightness display range into a plurality of brightness regions, and perform gamma correction on the brightness regions one by one, so that each brightness region corresponds to have at least one gamma factor.
  • the processor is further configured to run the program instructions to determine a transition region between any two adjacent brightness regions, and determine the corresponding transition region according to the gamma coefficients corresponding to the two adjacent brightness regions. gamma factor.
  • the processor is further configured to run the program instructions to: use the maximum luminance value of the first luminance zone or the minimum luminance value of the second luminance zone among the two adjacent luminance zones as a reference value, wherein, the maximum luminance value of the first luminance area is smaller than the minimum luminance value of the second luminance area; the luminance value after the reference value is reduced by the first value is used as the minimum luminance value of the transition area; and, the reference value is increased by the second The brightness value after the numerical value is used as the maximum brightness value of the transition area.
  • the gamma correction device further includes a brightness detection device.
  • the brightness detection device is connected with the processor, and is used to obtain the brightness of the frame picture to be displayed by the display device and the ambient brightness.
  • the memory is also configured to store preset gamma coefficients corresponding to each brightness area.
  • the processor is also configured to run the program instructions to perform gamma correction on the brightness region based on the preset gamma coefficient according to the brightness of the frame to be displayed and the brightness of the environment; wherein, different brightness The preset gamma coefficients corresponding to different areas are different.
  • another aspect of the present disclosure provides a display device.
  • the display device is configured to: synchronously display frame images according to multiple gamma coefficients corresponding to different brightness regions.
  • the gamma coefficient corresponding to each brightness region is determined according to the gamma correction method described in some embodiments above.
  • another aspect of the present disclosure provides a storage medium.
  • the storage medium stores computer instructions adapted to be executed by a processor, and when the computer instructions are executed by the processor, implement the gamma correction method described in some embodiments above.
  • a further aspect of the present disclosure provides a computer program comprising program instructions.
  • the program instructions When executed on a gamma correction device, the program instructions enable the gamma correction device to implement the gamma correction method described in some of the above embodiments.
  • FIG. 1 is a schematic diagram of a comparison between an actual measured Gamma curve and a Gamma2.8 curve provided according to some embodiments;
  • FIG. 2 is a schematic diagram of a comparison between an actual measured Gamma curve and a local area in a Gamma2.8 curve provided according to some embodiments;
  • Fig. 3 is a schematic flowchart of a gamma correction method provided according to some embodiments.
  • Fig. 4 is a schematic diagram of partitions of a brightness display range provided according to some embodiments.
  • Fig. 5 is a schematic diagram of divisions of another brightness display range provided according to some embodiments.
  • Fig. 6 is a schematic diagram of divisions of another brightness display range provided according to some embodiments.
  • Fig. 12 is a schematic diagram of a measured gamma curve L provided according to some embodiments.
  • Fig. 13 is a schematic structural diagram of a gamma correction device provided according to some embodiments.
  • Fig. 14 is a schematic structural diagram of another gamma correction device provided according to some embodiments.
  • Fig. 15 is a schematic structural diagram of a gamma correction device and a display device according to some embodiments.
  • the LED display device Most of the light-emitting units in the LED display device are Micro-LEDs or Mini-LEDs.
  • the size of Micro-LED is between 1 ⁇ m-100 ⁇ m.
  • the size of Mini-LED chip is between 50 ⁇ m-200 ⁇ m.
  • the LED display device adopts Micro-LED or Mini-LED as a light-emitting unit, which can have the advantages of high resolution, high contrast and low power consumption.
  • gamma correction is performed according to the product characteristics of the LED, and the standard gamma curve can be determined as a Gamma2.8 curve, that is, the display brightness of the LED display device is determined according to a Gamma coefficient of 2.8.
  • the gamma curve actually measured by the LED display device is an L1 curve, and the L1 curve cannot fit the Gamma2.8 curve well.
  • the difference between the gamma curve actually measured by the LED display device and the Gamma2.8 curve can be clearly seen. There is a large discrepancy between them. This also means that the display effect of the LED display device is difficult to achieve an ideal state.
  • an embodiment of the present disclosure provides a gamma correction method, including the following steps.
  • the brightness display range of the display device is usually expressed according to the brightness level, for example: the brightness display range of the display device is: 0-255; or, the brightness display range of the display device is: 0-1023.
  • the description below will be made by taking the brightness display range of the display device as 0-255 as an example.
  • the brightness display range of the display device can be flexibly divided into: a low brightness area LB, a middle brightness area MB and a high brightness area HB.
  • the brightness value of the low brightness area LB is smaller than the brightness value of the middle brightness area MB
  • the brightness value of the middle brightness area MB is smaller than the brightness value of the high brightness area HB.
  • the boundary value between the low brightness area LB and the middle brightness area MB, and the boundary value between the middle brightness area MB and the high brightness area HB can be flexibly selected and determined.
  • dividing the brightness display range into multiple brightness regions includes: dividing the brightness display range into multiple brightness regions.
  • the brightness display range of 0-255 is equally divided into brightness area A1, brightness area A2... to brightness area An, and n is the number of brightness areas.
  • the interval widths in the luminance area A1 , the luminance area A2 . . . , and the luminance area An are the same.
  • n 4
  • the interval width of each brightness region is: 64 (ie: 256/4).
  • the brightness value of the brightness area A1 is 0-63.
  • the brightness value of the brightness area A2 is 64-127.
  • the brightness value of the brightness area A3 is 128-191.
  • the brightness value of the brightness area A4 is 192-255.
  • dividing the brightness display range into a plurality of brightness regions includes: dividing the brightness display range into a plurality of brightness regions in such a manner that the value range of the brightness values is in a geometric sequence. For example, interval widths of the multiple brightness regions are distributed in a geometric sequence.
  • a brightness value for each brightness region may be determined.
  • n is the number of brightness regions
  • q is a proportional coefficient.
  • n 4 and q is 2.
  • the brightness value of the brightness area A1 is 0-17.
  • the brightness value of the brightness area A2 is 18-52.
  • the brightness value of the brightness area A3 is 53-121.
  • the brightness value of the brightness area A4 is 122-256.
  • the low brightness range can be divided into finer ranges. That is, along the direction from small to large brightness values, the brightness values of each brightness region are determined according to the geometric sequence.
  • the number of brightness zones can be selected and set according to actual needs.
  • the luminance display range of the display device is difficult to be equally divided into integer luminance areas, or is difficult to divide into integer luminance areas according to a geometric sequence, the luminance values of the edge luminance areas can be processed as appropriate to obtain Get a reasonable number of luma zones.
  • each brightness region After dividing the brightness display range into multiple brightness regions, gamma correction is performed on each brightness region, so that each brightness region can independently match a gamma coefficient, for example, each brightness region matches a different gamma coefficient under the same display condition. Gamma coefficients; or, it is also possible to make the same brightness region match different gamma coefficients for different display conditions. That is, in some embodiments, each brightness region has at least one gamma coefficient correspondingly, and at least one of the following solutions is also included: Solution 1: under the same display condition, the gamma coefficients corresponding to different brightness regions are different; solution 2, The same brightness region corresponds to different gamma coefficients under different display conditions.
  • the display condition includes, for example, ambient brightness and/or brightness of a frame image to be displayed by the display device.
  • the gamma coefficient corresponding to each brightness area refers to the gamma coefficient determined after gamma correction is performed on the brightness area, and it is also the gamma coefficient that the display device follows when displaying each brightness value in the brightness area .
  • the brightness display range of 0-255 is equally divided into a brightness area A1, a brightness area A2, a brightness area A3 and a brightness area A4.
  • the gamma coefficients corresponding to each brightness area are shown in Table 1 below.
  • Brightness area brightness value Gamma factor Brightness area A1 0 ⁇ 63 2.9
  • the display device especially the LED display device, it breaks the conventional situation of using a fixed gamma coefficient in the entire brightness display range of the display device, so that the display device can use different gamma coefficients according to different display brightness. , effectively improving the layering of the display screen, and ensuring that the display effect of the display device is more in line with the visual perception of the human eye, thereby effectively improving the display effect of the display device.
  • the brightness display range of the display device is, for example, 0-255.
  • the relationship between display brightness output and input in the display device satisfies:
  • the input value can be any value among 0, 1, 2, . . . , 255.
  • the brightness display range of 0-255 is flexibly divided into four brightness regions, and the brightness values and corresponding gamma coefficients (Gamma) of each brightness region are shown in Table 2.
  • Brightness area brightness value Gamma factor Brightness area A1 0 ⁇ 32 2.8 Brightness area A2 33 ⁇ 64 2.6 Brightness area A3 65 ⁇ 128 2.4 Brightness area A4 129 ⁇ 255 2.2
  • Brightness area brightness value Gamma factor Brightness area A1 0 ⁇ 25 3
  • Brightness area A2 26 ⁇ 50 2.9 Brightness area A3 51 ⁇ 75 2.8 Brightness area A4 76 ⁇ 100 2.7 Brightness area A5 101 ⁇ 125 2.6 Brightness area A6 126 ⁇ 150 2.5 Brightness area A7 151 ⁇ 175 2.4 Brightness area A8 176 ⁇ 200 2.3 Brightness area A9 201 ⁇ 225 2.2 Brightness area A10 226 ⁇ 255 2.1
  • Brightness area brightness value Gamma factor Brightness area A1 0 ⁇ 13 3.05 Brightness area A2 14 ⁇ 26 3 Brightness area A3 27 ⁇ 40 2.95 Brightness area A4 41 ⁇ 54 2.9 Brightness area A5 55 ⁇ 68 2.85 Brightness area A6 69 ⁇ 82 2.8 Brightness area A7 83 ⁇ 96 2.75 Brightness area A8 97 ⁇ 110 2.7 Brightness area A9 111 ⁇ 124 2.65 Brightness area A10 125 ⁇ 138 2.6 Brightness area A11 139 ⁇ 152 2.55 Brightness area A12 153 ⁇ 166 2.5 Brightness area A13 167 ⁇ 180 2.45 Brightness area A14 181 ⁇ 194 2.4 Brightness area A15 195 ⁇ 208 2.35
  • the output of the display brightness in the display device is positively correlated with the input, and when the brightness of the (n+1)th brightness region is greater than the brightness of the nth brightness region, the (n+1)th brightness region corresponds to The gamma coefficient of is less than or equal to the gamma coefficient corresponding to the nth brightness area.
  • the gamma correction method further includes the following steps.
  • determining a transition area between any two adjacent brightness areas includes the following steps.
  • the brightness value obtained by reducing the reference value by the first value is used as the minimum brightness value of the transition area.
  • the brightness value obtained by adding the second numerical value to the reference value is used as the maximum brightness value of the transition area.
  • the first value and the second value are the same.
  • the brightness display range of 0-255 is divided into two brightness regions, the brightness value of the first brightness region is 0-128, and its maximum brightness value is 128.
  • the brightness value of the second brightness zone is 129-255, and its minimum brightness value is 129.
  • the reference value can be 128 or 129.
  • the gamma coefficient corresponding to the first brightness area is 2.8
  • the gamma coefficient corresponding to the second brightness area is 2.7
  • the gamma coefficient corresponding to the second brightness area is smaller than that corresponding to the first brightness area gamma factor.
  • the base value is 129.
  • the first value and the second value are equal and both are 5.
  • the brightness value after subtracting the first value from the reference value is 124, which is the minimum brightness value of the transition area.
  • the brightness value after adding the second numerical value to the reference value is 134, which is the maximum brightness value of the transition area. That is, the brightness value of the transition area is 124-134.
  • the transition region includes multiple luminance values. Determining the gamma coefficient of the transition area in step S500 includes: determining the gamma coefficient corresponding to each brightness value in the transition area.
  • the gamma coefficient corresponding to the first brightness area among two adjacent brightness areas is Gamma1
  • the gamma coefficient corresponding to the second brightness area is Gamma2.
  • the gamma coefficient Gamma T corresponding to the target brightness value in the transition zone satisfies the following formula:
  • L is the interval span from the target brightness value to the reference value, namely:
  • the brightness value of the transition area is 124-134.
  • the gamma coefficient corresponding to each brightness value in the transition area is shown in Table 5.
  • a transition zone is determined between any two adjacent brightness zones, and the gamma coefficient corresponding to the transition zone is determined according to the gamma coefficients corresponding to the two brightness zones, especially the gamma coefficient corresponding to each brightness value in the transition zone is determined. gamma factor.
  • the brightness jump between two adjacent brightness regions can be effectively optimized to make the transition smoother, so as to further improve the display effect of the display device.
  • the smoother the brightness transition between two adjacent brightness regions will be.
  • performing gamma correction on brightness regions one by one further includes the following steps.
  • the brightness of the frame picture to be displayed on the display device and the ambient brightness are acquired.
  • gamma correction is performed on the brightness area based on a preset gamma coefficient.
  • the preset gamma coefficients corresponding to different brightness regions are different.
  • the preset gamma coefficient corresponding to each brightness area refers to the preset gamma coefficient reference before performing gamma correction on the brightness area, so as to correct the brightness area according to the preset gamma coefficient, Therefore, the gamma coefficient corresponding to the brightness area is determined.
  • the preset gamma factor can be selected and set according to the type of display device combined with daily experience.
  • a preset gamma coefficient greater than Gamma2.8 can be used, such as Gamma3.0 , to perform gamma correction.
  • the preset gamma coefficient of Gamma2.8 or smaller can be used for gamma correction.
  • the luminance value of the medium-high luminance area is greater than 32, for example.
  • the ambient brightness is less than or equal to the first preset ambient brightness; the brightness of the frame to be displayed is smaller than or equal to the first preset image brightness.
  • the preset gamma coefficient corresponding to the low brightness brightness area is greater than Gamma2.8, and the preset gamma coefficient corresponding to the medium and high brightness brightness area is less than or equal to Gamma2.8.
  • both the first preset ambient brightness and the first preset screen brightness can be selected and set according to the type of the display device and daily experience.
  • the gamma coefficient determined after the gamma correction is usually within a small floating range of the preset gamma coefficient.
  • a preset gamma coefficient smaller than Gamma2.8 can be used for low-brightness areas (for example, the brightness value is 0-32). For example, Gamma2.6, for gamma correction.
  • the ambient brightness is greater than the second preset ambient brightness.
  • the brightness of the low-brightness brightness area is smaller than the preset display brightness, and the preset gamma factor corresponding to the low-brightness brightness area is smaller than Gamma2.8.
  • both the second preset ambient brightness and the preset display brightness can be selected and set according to the type of the display device combined with daily experience.
  • the second preset ambient brightness is the same as or different from the first preset ambient brightness.
  • the gamma coefficient determined after the gamma correction is usually within a small floating range of the preset gamma coefficient.
  • the luminance value of the low luminance area rises faster, and the overall frame image displayed by the display device is brighter, and the display details of the low luminance area are easily lost.
  • the human eye does not need to perceive the display details in low-brightness areas. In this way, in the case of relatively bright ambient light, it is beneficial to ensure that the display effect of the display device is more in line with the visual perception of human eyes.
  • a corresponding gamma coefficient can be obtained for each gamma correction in the same brightness region under different display conditions.
  • the same brightness region may also have different gamma coefficients for different display conditions. Therefore, it is convenient for the display device to select the corresponding gamma coefficient for the same brightness area to perform display driving according to the brightness of the environment and the brightness of the frame to be displayed, so as to ensure that the display effect of the display device better matches the environment and is more in line with the visual perception of the human eye. .
  • the brightness display range of the display device is flexibly divided into three brightness zones, namely: a first brightness zone 0-126, a second brightness zone 127-193, and a third brightness zone 194-255.
  • the first brightness region 0 to 126 corresponds to
  • the gamma coefficient corresponding to the second brightness range 127-193 is Gamma 2.2
  • the gamma coefficient corresponding to the third brightness range 194-255 is Gamma 2.1.
  • the actually measured gamma curve L can be obtained as shown in FIG. 12 , which is consistent with the theoretically fitted gamma curve.
  • the embodiment of the present disclosure also provides a gamma correction device 1 , including: a memory 11 and a processor 12 .
  • the memory 11 is configured to store program instructions.
  • the processor 12 is configured to run the program instructions to obtain the brightness display range of the display device 2, divide the brightness display range into a plurality of brightness regions, and perform gamma correction on the brightness regions one by one, so that each brightness A region corresponds to a gamma coefficient.
  • the processor 12 is further configured to run the program instructions to determine a transition zone between any two adjacent luminance zones, and determine the transition zone according to the gamma coefficients corresponding to the two adjacent luminance zones. The gamma coefficient corresponding to the region.
  • the processor 12 may determine a transition region between any two adjacent brightness regions in the following manner.
  • the processor 12 is configured to: run the program instructions to: take the maximum luminance value of the first luminance zone or the minimum luminance value of the second luminance zone in two adjacent luminance zones as a reference value; reduce the reference value The brightness value after the first value is used as the minimum brightness value of the transition area; and the brightness value obtained by adding the second value to the reference value is used as the maximum brightness value of the transition area.
  • the maximum brightness value of the first brightness area is smaller than the minimum brightness value of the second brightness area.
  • the first value and the second value are the same.
  • the transition region includes multiple brightness values.
  • the processor 12 may determine the gamma coefficient corresponding to the transition zone in the following manner.
  • the processor 12 is configured to determine a gamma coefficient corresponding to each brightness value in the transition region.
  • the way of determining the gamma coefficient corresponding to each brightness value in the transition zone can refer to the relevant content in some of the foregoing embodiments, and will not be described in detail.
  • the processor 12 is further configured to: run the program instructions to obtain the brightness of the frame picture to be displayed and the ambient brightness of the display device 2, and according to the brightness of the frame picture to be displayed and the ambient brightness, based on a preset The gamma coefficient performs gamma correction on the brightness area; wherein, the preset gamma coefficients of different brightness areas are different.
  • the gamma correction device 1 further includes a brightness detection device 13 .
  • the brightness detection device 13 is connected to the processor 12 and is used for obtaining the brightness of the frame to be displayed on the display device and the ambient brightness.
  • the memory 11 is also configured to store preset gamma coefficients corresponding to each brightness area.
  • the processor 12 is also configured to run the program instructions to perform gamma correction on the brightness region based on the preset gamma coefficient according to the brightness of the frame to be displayed and the brightness of the environment; wherein, the preset gamma values corresponding to different brightness regions The coefficients are different.
  • memory 11 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or non-volatile memory.
  • the volatile memory may include, for example, random access memory (RAM) and/or cache memory (cache).
  • the non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, and the like.
  • One or more computer program instructions can be stored on the computer-readable storage medium, and the processor can execute the program instructions to realize the functions in the embodiments of the present disclosure (implemented by the processor) and/or other desired functions, such as Horse correction methods, etc.
  • the processor 12 may be implemented by a general-purpose integrated circuit chip or an application-specific integrated circuit chip.
  • the integrated circuit chip may be arranged on a main board, for example, a storage medium and a power supply circuit may also be provided on the main board;
  • the processor may also be realized by a circuit or by software, hardware (circuit), firmware or any combination thereof.
  • the processor 12 can also be a central processing unit, a microprocessor, such as an X86 processor, an ARM processor, or can be a graphics processing unit (GPU) or a tensor processing unit (TPU), or can be Digital processor (DSP), etc.
  • a microprocessor such as an X86 processor, an ARM processor
  • GPU graphics processing unit
  • TPU tensor processing unit
  • DSP Digital processor
  • the brightness detection device 13 may be a brightness colorimeter.
  • the memory 11 and the processor 12 can be integrated into a computer device 10 .
  • the computer device 10 is, for example, a display terminal.
  • the above-mentioned gamma correction device is used to implement the gamma correction method in some of the aforementioned embodiments, and the gamma correction device can also achieve the technical effects achieved by the above-mentioned gamma correction method, which will not be described in detail here.
  • the embodiment of the present disclosure also provides a display device 2 .
  • the display device 2 is configured to: synchronously display frame images according to multiple gamma coefficients corresponding to different brightness regions.
  • the gamma coefficients corresponding to each brightness area are determined by using the gamma correction method in some of the aforementioned embodiments.
  • gamma coefficients corresponding to different brightness regions are different.
  • the gamma coefficients corresponding to the same brightness region may also be different.
  • the display conditions are different, for example, the ambient brightness is different, or the ambient brightness and the brightness of the frame to be displayed are different.
  • the display device can also achieve the technical effects achieved by the aforementioned gamma correction method, which will not be described in detail here.
  • the display device is an LED display device, such as an LED display screen.
  • the embodiment of the present disclosure also provides a storage medium.
  • the storage medium stores computer instructions adapted to be executed by a processor, and when the computer instructions are executed by the processor, implement the gamma correction method described in some embodiments above.
  • the storage medium can also achieve the technical effects achieved by the aforementioned gamma correction method, and will not be described in detail here.
  • the storage medium may be provided in a computing device, and the computing device may further include a processor, and the processor may invoke computer instructions stored in the storage medium.
  • a storage medium stores computer instructions non-transitory.
  • Storage media may include memory cards for smartphones, memory components for tablet computers, hard disks for personal computers, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM), portable compact Disk read-only memory (CD-ROM), flash memory, or any combination of the above-mentioned storage media may also be other applicable storage media.
  • An embodiment of the present disclosure also provides a computer program, including program instructions. When executed on a gamma correction device, the program instructions enable the gamma correction device to implement the gamma correction method described in some of the above embodiments.

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Abstract

一种伽马校正方法及装置（1）、显示装置（2）、存储介质。伽马校正方法包括：获取显示装置（2）的亮度显示范围（S100）；将亮度显示范围划分为多个亮度区（S200）；逐一对亮度区进行伽马校正，以使每个亮度区对应具有至少一个伽马系数（S300）。伽马校正方法及装置（1）、显示装置（2）、存储介质可以有效提升显示装置（2）的显示效果。

Description

伽马校正方法及装置、显示装置、存储介质
相关申请的交叉引用
本公开要求于2021年09月10日提交中国专利局、申请号为202111062856.8、发明名称为“伽马校正方法及装置、显示装置、存储介质”的中国专利申请的优先权，所述专利申请的全部内容通过引用结合在本公开中。
技术领域
本公开涉及涉及显示技术领域，尤其涉及一种伽马校正方法及装置、显示装置、存储介质。
背景技术
发光二极管(Light Emitting Diode，简称LED)显示装置具有分辨率高、对比度高以及功耗低等优势，已经广泛应用于广告、体育、交通、金融、通讯、商业及演播等各行各业中。
基于人眼对亮度的感知和光源的物理功率不成正比，通常需要对显示装置的显示参数进行伽马校正。伽马校正对显示装置的显示效果起着至关重要的作用，LED显示装置也不例外。然而，在LED显示装置中，根据LED的产品特性进行伽马校正，并获取标准伽马曲线之后，发现LED显示装置实际量测的伽马曲线与标准伽马曲线之间存在不可避免的偏差。这也就意味着，LED显示装置的显示效果难以达到理想状态。
因此，如何提升LED显示装置的显示效果，是亟需解决的问题。
发明内容
根据本公开的各种实施例，提供一种伽马校正方法及装置、显示装置、存储介质。
根据一些实施例，本公开一方面提供了一种伽马校正方法，包括以下步骤。
获取显示装置的亮度显示范围。
将所述亮度显示范围划分为多个亮度区。
逐一对亮度区进行伽马校正，以使每个亮度区对应具有至少一个伽马系数。
根据一些实施例，伽马校正方法还包括以下步骤。
在任相邻的两个亮度区之间确定过渡区。
根据相邻两个亮度区对应的伽马系数，确定过渡区对应的伽马系数。
根据一些实施例，在任相邻的两个亮度区之间确定过渡区，包括以下步骤。
将相邻两个亮度区中第一个亮度区的最大亮度值或第二个亮度区的最小亮度值作为基准值；其中，第一个亮度区的最大亮度值小于第二个亮度区的最小亮度值。
将基准值减少第一数值后的亮度值，作为过渡区的最小亮度值。
将基准值增加第二数值后的亮度值，作为过渡区的最大亮度值。
根据一些实施例，第一数值和第二数值相同。
根据一些实施例，在同一显示条件下，第二个亮度区对应的伽马系数小于第一个亮度区对应的伽马系数。
根据一些实施例，过渡区包括多个亮度值。所述根据相邻两个亮度区对应的伽马系数，确定过渡区对应的伽马系数，包括：确定过渡区内每个亮度值对应的伽马系数。
根据一些实施例，过渡区内目标亮度值对应的伽马系数满足公式如下：
Figure PCTCN2022117021-appb-000001
其中，Gamma T为过渡区内目标亮度值对应的伽马系数，Gamma1为第一个亮度区对应的伽马系数，Gamma2为第二个亮度区对应的伽马系数，L为目标亮度值至基准值的区间跨度。
根据一些实施例，将亮度显示范围划分为多个亮度区，包括：将亮度显示范围等分为多个亮度区。
根据一些实施例，将亮度显示范围划分为多个亮度区，包括：将亮度显示范围，按照亮度值取值范围呈等比数列的方式，划分出多个亮度区。
根据一些实施例，逐一对亮度区进行伽马校正，还包括以下步骤。
获取显示装置待显示帧画面的亮度及环境亮度。
根据待显示帧画面的亮度及环境亮度，基于预设伽马系数对亮度区进行伽马校正；其中，不同亮度区对应的预设伽马系数不同。
根据一些实施例，环境亮度小于或等于第一预设环境亮度。待显示帧画面的亮度小于或等于第一预设画面亮度。低亮度亮度区对应的预设伽马系数大于Gamma2.8，中高亮度亮度区对应的预设伽马系数小于或等于Gamma2.8。
根据一些实施例，环境亮度大于第二预设环境亮度。低亮度亮度区的亮度小于预设显示亮度，低亮度亮度区对应的预设伽马系数小于Gamma2.8。
根据一些实施例，每个所述亮度区对应具有至少一个伽马系数，还包括以下至少一种方案：
方案一：同一显示条件下，不同所述亮度区对应的所述伽马系数不同；
方案二：同一所述亮度区在不同显示条件下分别对应不同的伽马系数。
根据一些实施例，本公开另一方面提供了一种伽马校正装置，包括：存储器和处理器。存储器被配置为存储程序指令。处理器被配置为运行所述程序指令，以获取显示装置的亮度显示范围，将所述亮度显示范围划分为多个亮度区，并逐一对亮度区进行伽马校正，以使每个亮度区对应具有至少一个伽马系数。
根据一些实施例，处理器还被配置为运行所述程序指令，以在任相邻的两个亮度区之间确定过渡区，并根据相邻两个亮度区对应的伽马系数，确定过渡区对应的伽马系数。
根据一些实施例，处理器还被配置为运行所述程序指令，以：将相邻两个亮度区中第一个亮度区的最大亮度值或第二个亮度区的最小亮度值作为基准值，其中，第一个亮度区的最大亮度值小于第二个亮度区的最小亮度值；将基准值减少第一数值后的亮度值，作为过渡区的最小亮度值；以及，将基准值增加第二数值后的亮度值，作为过渡区的最大亮度值。
根据一些实施例，所述伽马校正装置，还包括亮度检测装置。亮度检测装置与处理器相连接，用于获取显示装置待显示帧画面的亮度及环境亮度。存储器还被配置为存储各亮度区对应的预设伽马系数。处理器还被配置为运行所述程序指令，以根据所述待显示帧画面的亮度及所述环境亮度，基于所述预设伽马系数对所述亮度区进行伽马校正；其中，不同亮度区对应的预设伽马系数不同。
根据一些实施例，本公开又一方面提供了一种显示装置。所述显示装置被配置为：根据不同亮度区对应的多个伽马系数同步显示帧画面。其中，每个所述亮度区对应的所述伽马系数根据上述一些实施例中所述的伽马校正方法确定。
根据一些实施例，本公开又一方面提供了一种存储介质。所述存储介质存储有可适于处理器执行的计算机指令，且所述计算机指令被处理器执行时实施如上一些实施例中所述的伽马校正方法。
根据一些实施例，本公开又一方面提供了一种计算机程序，包括程序指令。当在伽马校正装置上执行时，所述程序指令使得该伽马校正装置实现上述一些实施例中所述的伽马校正方法。
本公开的一个或多个实施例的细节在下面的附图和描述中提出。本公开的其他特征、 目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明本公开实施例的技术方案，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为根据一些实施例提供的一种实际量测Gamma曲线与Gamma2.8曲线的对比示意图；
图2为根据一些实施例提供的一种实际量测Gamma曲线与Gamma2.8曲线中局部区域的对比示意图；
图3为根据一些实施例提供的一种伽马校正方法的流程示意图；
图4为根据一些实施例提供的一种亮度显示范围的分区示意图；
图5为根据一些实施例提供的另一种亮度显示范围的分区示意图；
图6为根据一些实施例提供的又一种亮度显示范围的分区示意图；
图7为根据一些实施例提供的一种伽马曲线L n＝4的示意图；
图8为根据一些实施例提供的一种伽马曲线L n＝10的示意图；
图9为根据一些实施例提供的一种伽马曲线L n＝18的示意图；
图10为根据一些实施例提供的一种伽马曲线L n＝2的示意图；
图11为根据一些实施例提供的一种伽马曲线L n＝2’的示意图；
图12为根据一些实施例提供的一种实测伽马曲线L的示意图；
图13为根据一些实施例提供的一种伽马校正装置的结构示意图；
图14为根据一些实施例提供的另一种伽马校正装置的结构示意图；
图15为根据一些实施例提供的一种伽马校正装置与显示装置的结构示意图。
具体实施方式
为了便于理解本公开，下面将参照相关附图对本公开进行更全面的描述。附图中给出了本公开的较佳实施方式。但是，本公开可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本公开的公开内容理解的更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于本公开的技术领域的技术人员通常理解的含义相同。本文中在本公开的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本公开。
LED显示装置中的发光单元多为微型发光二极管(Micro-LED)或迷你发光二极管(Mini-LED)。Micro-LED的尺寸介于1μm-100μm。Mini-LED芯片的尺寸介于50μm-200μm。LED显示装置采用Micro-LED或Mini-LED作为发光单元，可以具有分辨率高、对比度高以及功耗低等优势。
目前，在LED显示装置中，根据LED的产品特性进行伽马校正，可以确定标准伽马曲线为Gamma2.8曲线，即LED显示装置的显示亮度根据Gamma系数2.8确定。
然而，基于Micro-LED或Mini-LED的尺寸极微，LED显示装置在根据Gamma2.8曲线进行显示后，实际量测的伽马曲线与Gamma2.8曲线之间存在不可避免的偏差。例如图1中所示，LED显示装置实际量测的伽马曲线为L1曲线，L1曲线并不能很好的拟合Gamma2.8曲线。或者，例如图2中所示，在将针对LED显示装置低亮度显示时实际量测的伽马曲线放大示意后，可以明显看到LED显示装置实际量测的伽马曲线与Gamma2.8曲线之间存在较大的偏差。这也就意味着，LED显示装置的显示效果难以达到理想状态。
基于此，本公开希望提供一种能够解决上述技术问题的方案，其详细内容将在后续实施例中得以阐述。
请参阅图3，本公开实施例提供一种伽马校正方法，包括以下步骤。
S100，获取显示装置的亮度显示范围。
此处，显示装置的亮度显示范围通常按照亮度等级予以表示，例如：显示装置的亮度显示范围为：0～255；或者，显示装置的亮度显示范围为：0～1023。
为了方便描述，以下均以显示装置的亮度显示范围为0～255为例进行说明。
S200，将显示装置的亮度显示范围划分为多个亮度区。
可选地，请参阅图4，显示装置的亮度显示范围可以灵活划分为：低亮度区LB、中亮度区MB和高亮度区HB。其中，低亮度区LB的亮度值小于中亮度区MB的亮度值，中亮度区MB的亮度值小于高亮度区HB的亮度值。低亮度区LB和中亮度区MB之间的边界值、以及中亮度区MB和高亮度区HB之间的边界值，均可以灵活选择确定。
可选地，请参阅图5，将亮度显示范围划分为多个亮度区，包括：将亮度显示范围等分为多个亮度区。例如，将亮度显示范围0～255等分划分为亮度区A1、亮度区A2……至亮度区An，n为亮度区的个数。
此处，亮度区A1、亮度区A2……和亮度区An中的区间宽度相同。
在一个示例中，n为4，各亮度区的区间宽度为：64(即：256/4)。具体的，亮度区A1的亮度值为0～63。亮度区A2的亮度值为64～127。亮度区A3的亮度值为128～191。 亮度区A4的亮度值为192～255。
可选地，请参阅图6，将亮度显示范围划分为多个亮度区，包括：将亮度显示范围，按照亮度值取值范围呈等比数列的方式，划分出多个亮度区。例如，多个亮度区的区间宽度呈等比数列分布。
在一个示例中，根据等比数列求和公式：
Figure PCTCN2022117021-appb-000002
可以确定各亮度区的亮度值。其中，n为亮度区的个数，q为等比系数。
在一个示例中，n为4，q为2。亮度区A1的亮度值为0～17。亮度区A2的亮度值为18～52。亮度区A3的亮度值为53～121。亮度区A4的亮度值为122～256。
需要说明的是，由于人眼对低亮度较敏感，因此可以将低亮度范围划分的更细。也即，沿亮度值从小到大的方向，根据等比数列确定各亮度区的亮度值。
此外，值得一提的是，亮度区的个数可以根据实际需求选择设置。在一些情况下，若显示装置的亮度显示范围难以被等分为整数个亮度区，或难以按等比数列划分为整数个亮度区时，可以酌情对边缘处亮度区的亮度值进行处理，以获取合理数量的亮度区。
S300，逐一对亮度区进行伽马校正，以使每个亮度区对应具有至少一个伽马系数。
在将亮度显示范围划分为多个亮度区之后，针对每个亮度区分别进行伽马校正，可以使得每个亮度区独立匹配一个伽马系数，例如在同一显示条件下各亮度区分别匹配不同的伽马系数；或者，还可以使得同一亮度区针对不同的显示条件分别匹配不同的伽马系数。也即，在一些实施例中，每个亮度区对应具有至少一个伽马系数，还包括以下至少一种方案：方案一：同一显示条件下，不同亮度区对应的伽马系数不同；方案二，同一亮度区在不同显示条件下分别对应不同的伽马系数。
此处，显示条件例如包括环境亮度和/或显示装置待显示帧画面的亮度。
此处，每个亮度区对应的伽马系数，是指针对该亮度区进行伽马校正之后确定的伽马系数，也是显示装置用于显示该亮度区内各亮度值时所遵循的伽马系数。
示例的，亮度显示范围0～255等分划分为亮度区A1、亮度区A2、亮度区A3和亮度区A4。在对各亮度区分别进行伽马校正之后，各亮度区对应的伽马系数如下表一所示。
表一：
亮度区 亮度值 伽马系数
亮度区A1 0～63 2.9
亮度区A2 64～127 2.8
亮度区A3 128～191 2.7
亮度区A4 192～255 2.6
本公开实施例中，针对显示装置，尤其是LED显示装置，打破了常规在显示装置整个亮度显示范围使用一个固定伽马系数的情况，可以使得显示装置根据不同的显示亮度采用不同的伽马系数，有效提升显示画面的层次感，并确保显示装置的显示效果更加贴合人眼的视觉感知，从而有效提升显示装置的显示效果。
为了更清楚地说明上述一些实施例中的伽马校正方法，以下示例性的给出了几种可能的实施方式，以供参考理解。
显示装置的亮度显示范围例如为0～255。显示装置中显示亮度输出与输入的关系满足：
输出＝(输入/255) Gamma；
其中，输入的取值可以为0、1、2、…、255中的任一值。
在一种可能的实施方式中，亮度显示范围0～255灵活划分为四个亮度区，各亮度区的亮度值及对应的伽马系数(Gamma)如表二中所示。并且，根据表二中的伽马系数，可以拟合出显示装置的伽马曲线如图7中的曲线L n＝4所示。
表二：
亮度区 亮度值 伽马系数
亮度区A1 0～32 2.8
亮度区A2 33～64 2.6
亮度区A3 65～128 2.4
亮度区A4 129～255 2.2
在另一种可能的实施方式中，亮度显示范围0～255等分为10个亮度区，各亮度区的亮度值及对应的伽马系数(Gamma)如表三中所示。并且，根据表三中的伽马系数，可以拟合出显示装置的伽马曲线如图8中的曲线L n＝10所示。
表三：
亮度区 亮度值 伽马系数
亮度区A1 0～25 3
亮度区A2 26～50 2.9
亮度区A3 51～75 2.8
亮度区A4 76～100 2.7
亮度区A5 101～125 2.6
亮度区A6 126～150 2.5
亮度区A7 151～175 2.4
亮度区A8 176～200 2.3
亮度区A9 201～225 2.2
亮度区A10 226～255 2.1
在又一种可能的实施方式中，亮度显示范围0～255等分为18个亮度区，各亮度区的亮度值及对应的伽马系数(Gamma)如表四中所示。并且，根据表四中的伽马系数，可以拟合出显示装置的伽马曲线如图9中的曲线L n＝18所示。
表四：
亮度区 亮度值 伽马系数
亮度区A1 0～13 3.05
亮度区A2 14～26 3
亮度区A3 27～40 2.95
亮度区A4 41～54 2.9
亮度区A5 55～68 2.85
亮度区A6 69～82 2.8
亮度区A7 83～96 2.75
亮度区A8 97～110 2.7
亮度区A9 111～124 2.65
亮度区A10 125～138 2.6
亮度区A11 139～152 2.55
亮度区A12 153～166 2.5
亮度区A13 167～180 2.45
亮度区A14 181～194 2.4
亮度区A15 195～208 2.35
亮度区A16 209～222 2.3
亮度区A17 223～236 2.25
亮度区A18 237～255 2.2
由上可知，显示装置中显示亮度的输出与输入正相关，在第(n+1)个亮度区的亮度大于第n个亮度区的亮度的情况下，第(n+1)个亮度区对应的伽马系数小于或等于第n个亮度区对应的伽马系数。
此外，请结合图8～图10理解，由于不同的亮度区对应的伽马系数不同，因此在不同亮度区之间的过渡点，容易出现阶梯跳变的现象。并且，亮度显示范围划分的亮度区个数越多，相邻亮度区的亮度区间跨度越小，对应跳变的幅值越低。
基于此，请继续参阅图3，在一些实施例中，伽马校正方法还包括以下步骤。
S400，在任相邻的两个亮度区之间确定过渡区。
可选地，在任相邻的两个亮度区之间确定过渡区，包括以下步骤。
将相邻两个亮度区中第一个亮度区的最大亮度值或第二个亮度区的最小亮度值作为基准值；其中，第一个亮度区的最大亮度值小于第二个亮度区的最小亮度值。
将基准值减少第一数值后的亮度值，作为过渡区的最小亮度值。
将基准值增加第二数值后的亮度值，作为过渡区的最大亮度值。
可选地，第一数值和第二数值相同。
示例的，请参阅图10，亮度显示范围0～255划分为两个亮度区，第一亮度区的亮度值为0～128，其最大亮度值为128。第二个亮度区的亮度值为129～255，其最小亮度值为129。如此，基准值可以为128或129。在同一显示条件下，第一个亮度区对应的伽马系数为2.8，第二个亮度区对应的伽马系数为2.7，第二个亮度区对应的伽马系数小于第一个亮度区对应的伽马系数。根据第一亮度区和第二亮度区对应的伽马系数拟合后的伽马曲线L n＝2如图10中所示；其中，S区域为第一个亮度区和第二个亮度区之间的过渡区。
在一个示例中，基准值为129。第一数值和第二数值相等，且均为5。那么，将基准值减去第一数值后的亮度值为124，即为过渡区的最小亮度值。将基准值增加第二数值后的亮度值为134，即为过渡区的最大亮度值。也即，过渡区的亮度值为124～134。
S500，根据相邻两个亮度区对应的伽马系数，确定过渡区对应的伽马系数。
在一些示例中，过渡区包括多个亮度值。步骤S500中确定过渡区的伽马系数，包括：确定过渡区内每个亮度值对应的伽马系数。
示例的，相邻两个亮度区中第一个亮度区对应的伽马系数为Gamma1，第二个亮度区 对应的伽马系数为Gamma2。过渡区中目标亮度值对应的伽马系数Gamma T满足公式如下：
Figure PCTCN2022117021-appb-000003
其中，L为目标亮度值至基准值的区间跨度，即：
L＝|目标亮度值－基准值|。
请结合前述示例理解，例如，过渡区的亮度值为124～134。过渡区内每个亮度值对应的伽马系数如表五中所示。根据表五中各伽马系数拟合后的伽马曲线L n＝2’如图11中所示；其中，S’区域为第一个亮度区和第二个亮度区之间的过渡区。并且，根据图11所示的伽马曲线L n＝2’可知，第一亮度区和第二亮度区之间的亮度值过渡更为顺滑。
表五：
亮度值 伽马系数
0～124 2.8
125 2.79
126 2.78
127 2.77
128 2.76
129 2.75
130 2.74
131 2.73
132 2.72
133 2.71
134～255 2.7
本公开实施例在任相邻的两个亮度区之间确定过渡区，并根据两个亮度区对应的伽马系数确定过渡区对应的伽马系数，尤其是确定过渡区内每个亮度值对应的伽马系数。这样可以有效优化相邻两个亮度区之间的亮度跳变，使之过渡更为平滑，以进一步提升显示装置的显示效果。并且，过渡区内的亮度值越多，相邻两个亮度区之间的亮度过渡也就越顺滑。
在一些实施例中，逐一对亮度区进行伽马校正，还包括以下步骤。
获取显示装置待显示帧画面的亮度及环境亮度。
根据待显示帧画面的亮度及环境亮度，基于预设伽马系数对亮度区进行伽马校正。其中，不同亮度区对应的预设伽马系数不同。
此处，每个亮度区对应的预设伽马系数，是指在针对该亮度区进行伽马校正之前预设的伽马系数基准，以便于根据预设伽马系数对该亮度区进行校正，从而确定该亮度区对应的伽马系数。预设伽马系数可以根据显示装置的类型结合日常经验选择设置。
示例的，环境亮度较小，显示装置待显示帧画面的亮度较小，那么对于低亮度区(例如亮度值为0～32)可以采用大于Gamma2.8的预设伽马系数，例如Gamma3.0，进行伽马校正。而对于中高亮度区可以采用Gamma2.8或更小的预设伽马系数，进行伽马校正。中高亮度区的亮度值例如大于32。
也即，在一些实施例中，环境亮度小于或等于第一预设环境亮度；待显示帧画面的亮度小于或等于第一预设画面亮度。低亮度亮度区对应的预设伽马系数大于Gamma2.8，中高亮度亮度区对应的预设伽马系数小于或等于Gamma2.8。
此处，第一预设环境亮度和第一预设画面亮度均可以根据显示装置的类型结合日常经验选择设置。
可以理解的是，经伽马校正后确定后的伽马系数，通常会在预设伽马系数的一较小浮动范围内。预设伽马系数越大，对应确定的伽马系数也越大，也即Gamma曲线越下凹，显示装置显示的帧画面整体偏暗，其低亮度区的亮度值跨度也越宽，可以展现更多的低亮度细节。如此，有利于在显示装置待显示帧画面内容偏暗且环境光较暗的情况下，显示更多的低亮度细节，以进一步提升显示装置在低亮度情况下的显示效果。
示例的，环境亮度较大，显示装置待显示帧画面的亮度较大或较小，那么对于低亮度区(例如亮度值为0～32)均可以采用小于Gamma2.8的预设伽马系数，例如Gamma2.6，进行伽马校正。
也即，在一些实施例中，环境亮度大于第二预设环境亮度。低亮度亮度区的亮度小于预设显示亮度，低亮度亮度区对应的预设伽马系数小于Gamma2.8。
此处，第二预设环境亮度和预设显示亮度均可以根据显示装置的类型结合日常经验选择设置。第二预设环境亮度与第一预设环境亮度相同或不同，均可。
可以理解的是，经伽马校正后确定后的伽马系数，通常会在预设伽马系数的一较小浮动范围内。预设伽马系数越小，对应确定的伽马系数也越小。这样可以使得低亮度区的亮度值上升较快，显示装置显示的帧画面整体偏亮，低亮度区的显示细节容易丢失。但基于 环境亮度较大，人眼并不需要对低亮度区的显示细节进行感知。如此，在环境光较亮的情况下，有利于确保显示装置的显示效果更符合人眼的视觉感知。
基于上述实施例，针对同一亮度区在不同显示条件下的每一次伽马校正，均可获得一个对应的伽马系数。如此，同一亮度区针对不同的显示条件也可以具有不同的伽马系数。从而方便于显示装置根据环境亮度和待显示帧画面的亮度，针对同一亮度区选择对应的伽马系数进行显示驱动，以确保显示装置的显示效果更为匹配环境，也更符合人眼的视觉感知。
在一个示例中，显示装置的亮度显示范围灵活划分为三个亮度区，分别为：第一个亮度区0～126，第二个亮度区127～193，第三个亮度区194～255。在采用本公开实施例提供的伽马校正方法对该显示装置的伽马系数进行校正之后(包括对相邻亮度区之间的过渡区进行伽马校正)，第一个亮度区0～126对应的伽马系数为Gamma2.3，第二个亮度区127～193对应的伽马系数为Gamma2.2，第三个亮度区194～255对应的伽马系数为Gamma2.1。
基于此，在对显示装置的显示亮度进行实际量测后，可得实际量测的伽马曲线L如图12中所示，其与理论拟合的伽马曲线相一致。
请参阅图13～图15，本公开实施例还提供一种伽马校正装置1，包括：存储器11和处理器12。存储器11被配置为存储程序指令。处理器12被配置为运行所述程序指令，以获取显示装置2的亮度显示范围，将所述亮度显示范围划分为多个亮度区，并逐一对亮度区进行伽马校正，以使每个亮度区对应具有一个伽马系数。
在一些实施例中，处理器12还被配置为运行所述程序指令，以在任相邻的两个亮度区之间确定过渡区，并根据相邻两个亮度区对应的伽马系数，确定过渡区对应的伽马系数。
可选地，处理器12可以通过如下方式确定任相邻两个亮度区之间的过渡区。处理器12被配置为：运行所述程序指令，以：将相邻两个亮度区中第一个亮度区的最大亮度值或第二个亮度区的最小亮度值作为基准值；将基准值减少第一数值后的亮度值，作为过渡区的最小亮度值；以及，将基准值增加第二数值后的亮度值，作为过渡区的最大亮度值。
其中，第一个亮度区的最大亮度值小于第二个亮度区的最小亮度值。
可选地，第一数值和第二数值相同。
可选地，过渡区包括多个亮度值。处理器12可以通过如下方式确定过渡区对应的伽马系数。
处理器12被配置为确定过渡区内每个亮度值对应的伽马系数。
此处，过渡区内每个亮度值对应的伽马系数的确定方式，可以参见前述一些实施例中 的相关内容，不再详述。
在一些实施例中，处理器12还被配置为：运行所述程序指令，以获取显示装置2待显示帧画面的亮度及环境亮度，并根据待显示帧画面的亮度及环境亮度，基于预设伽马系数对亮度区进行伽马校正；其中，不同亮度区的预设伽马系数不同。
可以理解，显示装置2待显示帧画面的亮度及环境亮度可以通过亮度检测装置获取。在一些实施例中，请参阅图14，伽马校正装置1还包括亮度检测装置13。亮度检测装置13与处理器12相连接，用于获取显示装置待显示帧画面的亮度及环境亮度。存储器11还被配置为存储各亮度区对应的预设伽马系数。处理器12还被配置为运行所述程序指令，以根据待显示帧画面的亮度及环境亮度，基于预设伽马系数对亮度区进行伽马校正；其中，不同亮度区对应的预设伽马系数不同。
此处，预设伽马系数的选择设置，可以参见前述一些实施例中的相关内容，不再详述。
在一些实施例中，存储器11可以包括一个或多个计算机程序产品，该计算机程序产品可以包括各种形式的计算机可读存储介质，例如易失性存储器和/或非易失性存储器。该易失性存储器例如可以包括随机存取存储器(RAM)和/或高速缓冲存储器(cache)等。该非易失性存储器例如可以包括只读存储器(ROM)、硬盘、闪存等。在计算机可读存储介质上可以存储一个或多个计算机程序指令，处理器可以运行该程序指令，以实现本公开实施例中(由处理器实现)的功能以及/或者其它期望的功能，例如伽马校正方法等。
在一些实施例中，处理器12可以由通用集成电路芯片或专用集成电路芯片实现，例如该集成电路芯片可以设置在一个主板上，例如在该主板上还可以设置有存储介质以及电源电路等；此外，处理器也可以由电路或者采用软件、硬件(电路)、固件或其任意组合方式实现。
在一些实施例中，处理器12也可以是中央处理器、微处理器，例如X86处理器、ARM处理器，或者可以是图像处理器(GPU)或张量处理器(TPU)，或者可以是数字处理器(DSP)等。
在一些实施例中，请参阅图15，亮度检测装置13可以为亮度色度计。
在一些实施例中，请参阅图15，存储器11和处理器12可以集成于一计算机设备10中。该计算机设备10例如为显示终端。
上述伽马校正装置用于实施前述一些实施例中的伽马校正方法，前述伽马校正方法所能实现的技术效果，该伽马校正装置也均能实现，此处不再详述。
请继续参阅图15，本公开实施例还提供一种显示装置2。所述显示装置2被配置为： 根据不同亮度区对应的多个伽马系数同步显示帧画面。
此处，各亮度区对应的伽马系数，采用前述一些实施例中的伽马校正方法确定。
可选地，不同亮度区对应的伽马系数不同。
可选地，在显示条件不同的情况下，同一亮度区对应的伽马系数也可以不同。显示条件不同，例如为环境亮度不同，或者为环境亮度和待显示帧画面的亮度均不同。
前述伽马校正方法所能实现的技术效果，该显示装置也均能实现，此处不再详述。
示例的，显示装置为LED显示装置，例如LED显示屏。
本公开实施例还提供一种存储介质。所述存储介质存储有可适于处理器执行的计算机指令，且所述计算机指令被处理器执行时实施如上一些实施例中所述的伽马校正方法。前述伽马校正方法所能实现的技术效果，该存储介质也均能实现，此处不再详述。
在一些实施例中，存储介质可以设置在计算装置中，该计算装置还可以包括处理器，处理器可以调用存储在存储介质中的计算机指令。
在一些实施例中，存储介质非暂时性地存储计算机指令。存储介质可以包括智能电话的存储卡、平板电脑的存储部件、个人计算机的硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦除可编程只读存储器(EPROM)、便携式紧致盘只读存储器(CD-ROM)、闪存、或者上述存储介质的任意组合，也可以为其他适用的存储介质。
本公开实施例还提供一种计算机程序，包括程序指令。当在伽马校正装置上执行时，所述程序指令使得该伽马校正装置实现上述一些实施例中所述的伽马校正方法。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本公开的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以做出若干变形和改进，这些都属于本公开的保护范围。因此，本公开专利的保护范围应以所附权利要求为准。

Claims (18)

  1. 一种伽马校正方法，包括：
    获取显示装置的亮度显示范围；
    将所述亮度显示范围划分为多个亮度区；
    逐一对所述亮度区进行伽马校正，以使每个所述亮度区对应具有至少一个伽马系数。
  2. 如权利要求1所述的伽马校正方法，其中，所述伽马校正方法还包括：
    在任相邻的两个所述亮度区之间确定过渡区；
    根据相邻两个所述亮度区对应的所述伽马系数，确定所述过渡区对应的伽马系数。
  3. 如权利要求2所述的伽马校正方法，其中，所述在任相邻的两个所述亮度区之间确定过渡区，包括：
    将相邻两个所述亮度区中第一个亮度区的最大亮度值或第二个亮度区的最小亮度值作为基准值；其中，所述第一个亮度区的最大亮度值小于所述第二个亮度区的最小亮度值；
    将所述基准值减少第一数值后的亮度值，作为所述过渡区的最小亮度值；
    将所述基准值增加第二数值后的亮度值，作为所述过渡区的最大亮度值。
  4. 如权利要求3所述的伽马校正方法，其中，所述第一数值和所述第二数值相同。
  5. 如权利要求3所述的伽马校正方法，其中，在同一显示条件下，所述第二个亮度区对应的所述伽马系数小于所述第一个亮度区对应的所述伽马系数。
  6. 如权利要求3所述的伽马校正方法，其中，所述过渡区包括多个亮度值；所述根据相邻两个所述亮度区对应的所述伽马系数，确定所述过渡区对应的伽马系数，包括：
    确定所述过渡区内每个亮度值对应的伽马系数。
  7. 如权利要求6所述的伽马校正方法，其中，所述过渡区内目标亮度值对应的伽马系数满足公式如下：
    Figure PCTCN2022117021-appb-100001
    其中，Gamma T为所述过渡区内目标亮度值对应的伽马系数，Gamma1为所述第一个亮度区对应的伽马系数，Gamma2为所述第二个亮度区对应的伽马系数，L为所述目标亮度值至所述基准值的区间跨度。
  8. 如权利要求1～7中任一项所述的伽马校正方法，其中，所述将所述亮度显示范围划分为多个亮度区，包括：
    将所述亮度显示范围等分为多个所述亮度区；
    或，将所述亮度显示范围，按照亮度值取值范围呈等比数列的方式，划分出多个所述亮度区。
  9. 如权利要求1～7中任一项所述的伽马校正方法，其中，所述逐一对所述亮度区进行伽马校正，还包括：
    获取所述显示装置待显示帧画面的亮度及环境亮度；
    根据所述待显示帧画面的亮度及所述环境亮度，基于预设伽马系数对所述亮度区进行伽马校正；其中，不同所述亮度区对应的所述预设伽马系数不同。
  10. 如权利要求9所述的伽马校正方法，其中，
    所述环境亮度小于或等于第一预设环境亮度；
    所述待显示帧画面的亮度小于或等于第一预设画面亮度；
    低亮度所述亮度区对应的所述预设伽马系数大于Gamma2.8，中高亮度所述亮度区对应的所述预设伽马系数小于或等于Gamma2.8。
  11. 如权利要求9所述的伽马校正方法，其中，
    所述环境亮度大于第二预设环境亮度；
    低亮度所述亮度区的亮度小于预设显示亮度；低亮度所述亮度区对应的所述预设伽马系数小于Gamma2.8。
  12. 如权利要求1～7中任一项所述的伽马校正方法，其中，每个所述亮度区对应具有至少一个伽马系数，还包括以下至少一种方案：
    方案一：同一显示条件下，不同所述亮度区对应的所述伽马系数不同；
    方案二：同一所述亮度区在不同显示条件下分别对应不同的伽马系数。
  13. 一种伽马校正装置，包括：
    存储器，被配置为存储程序指令；
    以及，处理器，被配置为运行所述程序指令，以获取显示装置的亮度显示范围，将所述亮度显示范围划分为多个亮度区，并逐一对所述亮度区进行伽马校正，以使每个所述亮度区对应具有至少一个伽马系数。
  14. 如权利要求13所述的伽马校正装置，其中，所述处理器还被配置为运行所述程序指令，以在任相邻的两个所述亮度区之间确定过渡区，并根据相邻两个所述亮度区对应的伽马系数，确定所述过渡区对应的伽马系数。
  15. 如权利要求14所述的伽马校正装置，其中，所述处理器还被配置为运行所述程序 指令，以：
    将相邻两个所述亮度区中第一个亮度区的最大亮度值或第二个亮度区的最小亮度值作为基准值，其中，所述第一个亮度区的最大亮度值小于所述第二个亮度区的最小亮度值；
    将所述基准值减少第一数值后的亮度值，作为所述过渡区的最小亮度值；
    以及，将所述基准值增加第二数值后的亮度值，作为所述过渡区的最大亮度值。
  16. 如权利要求13～15中任一项所述的伽马校正装置，其中，还包括：
    亮度检测装置，与所述处理器相连接，用于获取显示装置待显示帧画面的亮度及环境亮度；
    其中，所述存储器还被配置为存储各所述亮度区对应的预设伽马系数；
    所述处理器还被配置为运行所述程序指令，以根据所述待显示帧画面的亮度及所述环境亮度，基于所述预设伽马系数对所述亮度区进行伽马校正；其中，不同亮度区对应的预设伽马系数不同。
  17. 一种显示装置，所述显示装置被配置为：根据不同亮度区对应的多个伽马系数同步显示帧画面；其中，每个所述亮度区对应的所述伽马系数根据如权利要求1～12中任一项所述的伽马校正方法确定。
  18. 一种存储介质，所述存储介质存储有可适于处理器执行的计算机指令，且所述计算机指令被所述处理器执行时实施如权利要求1～12中任一项所述的伽马校正方法。
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