WO2022006756A1 - 亮色度校正方法、装置、系统，存储介质及显示器 - Google Patents

亮色度校正方法、装置、系统，存储介质及显示器 Download PDF

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Publication number
WO2022006756A1
WO2022006756A1 PCT/CN2020/100710 CN2020100710W WO2022006756A1 WO 2022006756 A1 WO2022006756 A1 WO 2022006756A1 CN 2020100710 W CN2020100710 W CN 2020100710W WO 2022006756 A1 WO2022006756 A1 WO 2022006756A1
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Prior art keywords
brightness
chromaticity
backlight
display
chrominance
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PCT/CN2020/100710
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English (en)
French (fr)
Inventor
曾少青
邵寅亮
方力
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北京凯视达科技股份有限公司
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Priority to PCT/CN2020/100710 priority Critical patent/WO2022006756A1/zh
Priority to CN202080003291.3A priority patent/CN112543969B/zh
Publication of WO2022006756A1 publication Critical patent/WO2022006756A1/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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

Definitions

  • the present disclosure relates to the technical field of backlight displays, and in particular, to a brightness and chromaticity correction method, device, system, storage medium and display.
  • the backlight panel is usually designed in the form of an array of light-emitting diodes (LEDs) evenly arranged.
  • the backlight source of the direct-type partition dynamic backlight display can be a single-color LED light or an LED light composed of three primary colors of red, green and blue.
  • the purpose of the present disclosure is to provide a brightness and chromaticity correction method, device, system, storage medium and display, so that the brightness and chromaticity of each backlight area on the backlight panel of the display have uniformity, thereby improving the quality of displayed images.
  • a brightness and chromaticity correction method including:
  • the target common brightness and chromaticity characteristic value According to the brightness and chromaticity characteristic values of all the backlight regions, determine the target common brightness and chromaticity characteristic value
  • the correction parameter is used to adjust the brightness and chromaticity of the corresponding backlight area, so that the brightness and chromaticity of each of the backlight areas on the backlight panel are uniform.
  • the preset transmittance includes: red preset transmittance, green preset transmittance, and blue preset transmittance;
  • the bright chromaticity image of each backlight area includes the backlight The first brightness and chrominance images, the second brightness and chrominance images, and the third brightness and chrominance images in the area, correspondingly, the acquiring the brightness and chrominance images corresponding to each backlight area on the display, including:
  • the transmittance of the display is configured to be the red preset transmittance, acquiring the first brightness and chromaticity images corresponding to the backlight regions on the display respectively;
  • the transmittance of the display is configured to be the green preset transmittance, acquiring the second brightness and chromaticity images corresponding to each of the backlight regions on the display;
  • the transmittance of the display is configured to be the blue preset transmittance
  • the third brightness and chromaticity images corresponding to each of the backlight regions on the display are acquired.
  • the luminance and chromaticity characteristic values of each of the backlight regions are tristimulus values.
  • the luminance and chrominance feature values include luminance feature values and chrominance feature values
  • the method further includes: calculating the luminance feature value or the chrominance feature value of each luminance chrominance image by the following formula:
  • Fea represents the brightness characteristic value or the chromaticity characteristic value of the backlight area
  • k represents the number of pixels in the brightness chromaticity image of the backlight area
  • Gray represents the brightness of each pixel in the brightness chromaticity image of the backlight area.
  • the grayscale value, n represents a performance parameter of the device that captures the light and chrominance image.
  • determining the target public brightness and chromaticity characteristic values according to the brightness and chromaticity characteristic values of all the backlight regions including:
  • the target luminance characteristic value in the target public luminance and chromaticity characteristic values is obtained by multiplying the predetermined coefficient, wherein the predetermined coefficient is a positive value not greater than 1. number;
  • the common color gamut of all the backlight areas is determined, and the common color gamut is the target chromaticity characteristic value in the target common brightness and chromaticity characteristic values.
  • correction parameters of each of the backlight regions are calculated by the following formula:
  • a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of the method in any one of the above-mentioned first aspects.
  • a brightness and chromaticity correction device comprising:
  • a processor configured to execute the computer program in the memory, to implement the steps of the method in any one of the above-mentioned first aspects.
  • a display including the luminance and chrominance correction device according to the third aspect.
  • a brightness and chromaticity correction system including a display and a brightness and chromaticity correction device connected in communication with the display;
  • the brightness and chromaticity correction device is configured to send a brightness and chromaticity correction instruction to the display after obtaining the correction parameters according to the method according to any one of the above-mentioned first aspects, and the brightness and chromaticity correction instruction includes the correction parameter;
  • the display is configured to, in response to receiving the brightness and chromaticity correction instruction sent by the brightness and chromaticity correction device, correct the parameters of the backlight panel of the display according to the correction parameters in the brightness and chromaticity correction instruction.
  • the brightness and chromaticity images corresponding to the respective backlight regions on the display are acquired, wherein the brightness and chromaticity images are captured under the condition that the transmittance of the display is configured to be a preset transmittance.
  • the brightness and chrominance characteristic values of each backlight region are determined.
  • the target common brightness and chromaticity eigenvalues For each backlight area, a correction parameter for adjusting the brightness and chrominance characteristic value of the backlight area to the target common brightness and chrominance characteristic value is calculated.
  • the brightness and chromaticity of the corresponding backlight area are adjusted according to the correction parameters of each backlight area, so that the brightness and chromaticity of each backlight area on the backlight panel of the display is uniform, thereby improving the quality of the image displayed on the display.
  • FIG. 1 is a flow chart of a luminance and chrominance correction method according to an exemplary embodiment of the present disclosure.
  • FIG. 2 is a schematic diagram showing the relationship between a luminance and chrominance image and a field k according to an exemplary embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram of a color gamut space according to an exemplary embodiment of the present disclosure.
  • FIG. 4 is a block diagram of a luminance and chrominance correction apparatus according to an exemplary embodiment of the present disclosure.
  • FIG. 5 is a block diagram of a luminance and chrominance correction system according to an exemplary embodiment of the present disclosure.
  • the backlight panel is usually designed in the form of an array of light-emitting diodes (LEDs) evenly arranged.
  • the backlight source of the direct-type partition dynamic backlight display can be a single-color LED lamp or an LED lamp composed of three primary colors of red, green and blue. If the backlight panel adopts a single-color LED lamp, such as a blue light lamp, the blue light emitted by the blue light lamp excites the fluorescent light to emit white light, which is irradiated on the display panel. If the backlight panel adopts LED lights composed of three primary colors, red, green, and blue, white light is emitted on the display panel through the superposition of the three primary colors. Among them, the display panel itself does not have light-emitting performance. The display panel selectively filters some colors through the illumination of the backlight panel and through the color filter, so as to achieve the purpose of displaying images of different colors.
  • embodiments of the present disclosure provide a brightness and chromaticity correction method, device, system, storage medium and display, so as to make the brightness and chromaticity of each backlight area on the backlight panel of the display uniform, thereby improving the quality of the image displayed on the display. quality.
  • FIG. 1 is a flow chart of a brightness and chromaticity correction method according to an exemplary embodiment of the present disclosure. As shown in FIG. 1 , the brightness and chromaticity correction method may include the following steps:
  • the display may be a liquid crystal display including a direct type backlight panel and a liquid crystal display panel (LCD).
  • the LED light array evenly distributed on the backlight panel can be divided into multiple areas, so the light intensity of each backlight area on the backlight panel can be controlled separately, so as to improve the display efficiency.
  • the backlight panel can be divided into multiple backlight areas of the same size, and each backlight area includes at least one light emitting diode or fluorescent light source.
  • each backlight area of the backlight panel corresponds to a pixel area on the display.
  • each pixel area on the display corresponds to displaying one image area in each frame of the image.
  • step S11 brightness and chromaticity images corresponding to each backlight area on the display may be acquired, wherein the acquired brightness and chromaticity images corresponding to each backlight area are not affected by other backlight areas.
  • An achievable implementation is to control each backlight area in turn, and when the transmittance of the display is configured to be a preset transmittance, the backlight area is obtained by photographing with a bright and chromaticity imaging device (such as a camera). chrominance image.
  • each backlight area on the backlight panel is controlled by a dot-split display method, so that the brightness and chromaticity images corresponding to the plurality of backlight areas can be acquired at one time.
  • the dot-split display method specifically refers to controlling the next backlight area to light up after spacing multiple backlight areas, so that the brightness and chromaticity images of multiple non-adjacent backlight areas on the backlight panel can be obtained at one time.
  • the implementation of obtaining the brightness and chromaticity images corresponding to each backlight area on the backlight panel of the display can also be, before the backlight panel and the display panel are assembled into a display, the , to obtain the brightness and chromaticity images of each backlight area on the backlight panel. In this way, there is no need to control the transmittance of the display panel of the display.
  • the brightness and chromaticity characteristic values of the backlight area can be calculated according to the brightness and chromaticity images of each backlight area.
  • the photographing plane of the luminance and chromaticity imaging device since the photographing plane of the luminance and chromaticity imaging device may not be parallel to the plane of the display panel of the display, or the position of the mid-perpendicular line of the two planes is deviated, the luminance and chromaticity imaging device is used for photographing.
  • the obtained brightness and chrominance images may be deformed. Therefore, before determining the brightness and chrominance characteristic values of each backlight region based on the brightness and chrominance images corresponding to each backlight region, image correction processing may be performed on the brightness and chrominance images of each backlight region.
  • a scale image is first displayed on the liquid crystal display, and the scale image is captured by a brightness and chromaticity imaging device to obtain an image to be corrected.
  • an image processing or image recognition algorithm to extract the position information of the feature points of the image to be corrected.
  • the mapping conversion parameters of the liquid crystal display panel and the luminance and chromaticity imaging device are calculated.
  • the mapping transformation parameter can be Using the mapping conversion parameters, the brightness and chrominance images of each backlight area captured by the brightness and chrominance imaging device can be corrected.
  • the brightness and chromaticity images of each backlight area are corrected by the following calculation formula:
  • the corrected brightness and chromaticity images of each backlight area are more matched with the images displayed on the display.
  • the shooting angle error in the implementation process is avoided.
  • the target common brightness and chrominance characteristic value may be determined according to the brightness and chrominance characteristic values of all the backlight areas.
  • the uniformity specifically refers to the uniform brightness and the same chromaticity space of each backlight area, that is, each backlight area has the same brightness and the same chromaticity space. It is shown that the same display source signal corresponds to the same chromaticity of the image displayed on the monitor.
  • a correction parameter for adjusting the brightness and chromaticity characteristic value of the backlight area to the target common brightness and chromaticity characteristic value can be calculated for each backlight area, so that The calibration parameters of each backlight area on the backlight panel of the display can be obtained.
  • the brightness and chromaticity images corresponding to each backlight area on the display are obtained, wherein the brightness and chromaticity images are captured under the condition that the transmittance of the display is configured to be a preset transmittance.
  • the brightness and chrominance characteristic values of each backlight region are determined.
  • the target common brightness and chromaticity eigenvalues For each backlight area, a correction parameter for adjusting the brightness and chrominance characteristic value of the backlight area to the target common brightness and chrominance characteristic value is calculated.
  • the brightness and chromaticity of the corresponding backlight area are adjusted according to the correction parameters of each backlight area, so that the brightness and chromaticity of each backlight area on the backlight panel of the display is uniform, thereby improving the quality of the image displayed on the display.
  • the preset transmittance includes: red preset transmittance, green preset transmittance, and blue preset transmittance;
  • the bright chromaticity image of each backlight area includes the backlight
  • the first bright chromaticity image, the second bright chromaticity image and the third bright chromaticity image in the area, correspondingly, the acquiring the respective bright and chromaticity images corresponding to each backlight area on the display includes the following steps:
  • the transmittance of the display is configured to be the red preset transmittance, acquiring the first brightness and chromaticity images corresponding to the backlight regions on the display respectively;
  • the transmittance of the display is configured to be the green preset transmittance, acquiring the second brightness and chromaticity images corresponding to each of the backlight regions on the display;
  • the transmittance of the display is configured to be the blue preset transmittance
  • the third brightness and chromaticity images corresponding to each of the backlight regions on the display are acquired.
  • the brightness and chrominance images of each backlight region can be acquired from the camera. It can also interact with the camera in real time, and synchronize the camera to obtain the brightness and chromaticity images of each backlight area.
  • the transmittance of the display can be configured to be red preset transmittance and green preset transmittance in turn.
  • the first bright chromaticity image, the second bright chromaticity image, and the third bright chromaticity image when each backlight area is individually lit are obtained by taking pictures with the camera.
  • the first bright chromaticity image is a red chromaticity image
  • the second bright chromaticity image is a green chromaticity image
  • the third bright chromaticity image is a blue chromaticity image.
  • the brightness and chromaticity correction method when correcting the brightness and chromaticity of the LED lamp on the backlight panel, it is necessary to perform correction from three chromaticities of red, green and blue.
  • the characteristic values of brightness and chromaticity of each of the backlight regions are tristimulus values.
  • the tristimulus values are the representation of the amount of stimulation of the three primary colors that cause the human retina to perceive a certain color.
  • the LED lights on the backlight board are single-color LED lights, the brightness and chromaticity characteristic values of each of the backlight regions are brightness values.
  • the luminance and chrominance feature values include luminance feature values and chrominance feature values.
  • the luminance feature value or the chrominance feature value of each luminance chrominance image is calculated by the following formula:
  • Fea represents the brightness characteristic value or the chromaticity characteristic value of the backlight area
  • k represents the number of pixels in the brightness chromaticity image of the backlight area
  • Gray represents the brightness of each pixel in the brightness chromaticity image of the backlight area.
  • the grayscale value, n represents a performance parameter of the device that captures the light and chrominance image.
  • the relationship between the parameter k in the above formula and the brightness and chrominance image of the backlight area can be as shown in FIG. 2 .
  • the circular area in FIG. 2 represents the brightness and chromaticity image of a backlight area
  • the entire square area is the area of the parameter k in the above calculation formula.
  • k represents the contour field that identifies the bright and chrominance image. It should be understood by those of ordinary skill in the art that, after removing the background noise in the bright and chromaticity image, the identified contour area of the image should be greater than or equal to the area of the bright and chromaticity image.
  • the LED lights on the backlight panel are monochromatic LED lights
  • the brightness and chromaticity characteristic values of each of the backlight areas are brightness values
  • the brightness characteristic values of each backlight area can be calculated through the above calculation formula.
  • the LED lights on the backlight panel are LED lights with three primary colors
  • the brightness and chromaticity characteristic values of each backlight area are tristimulus values, including the brightness information and chromaticity information of the backlight area. That is, in this case, the brightness and chromaticity characteristic value of the backlight area is a 3*3 array.
  • the tristimulus values based on the three primary colors are calculated for the first luminance chrominance image, the second luminance chrominance image, and the third luminance chrominance image respectively, which can be characterized as Among them, Xr, Yr, Zr represent the red tristimulus values in the brightness and chromaticity eigenvalues of the backlight area, Xg, Yg, Zg represent the green tristimulus values in the brightness and chromaticity eigenvalues of the backlight area, Xb, Yb, Zb represent the backlight area.
  • the luminance characteristic value and the chromaticity characteristic value of the backlight area can be calculated respectively by the above calculation formula.
  • the determining of the target common brightness and chromaticity characteristic value according to the brightness and chromaticity characteristic values of all the backlight areas may specifically be based on the average value of the brightness characteristic values of all the backlight areas, multiplied by a predetermined value.
  • the target brightness characteristic value of the backlight panel of the entire display can be determined.
  • the average value of the brightness characteristic values of all the backlight areas can be multiplied by a preset coefficient to obtain the target common brightness and chromaticity
  • the target luminance eigenvalue in eigenvalues can be used.
  • other statistical methods may also be used to determine the target brightness characteristic value based on the brightness characteristic values of all backlight regions. Other statistical methods are weighted, histogram statistics and so on.
  • FIG. 3 is a color gamut surrounded by RGB color coordinates of a backlight area.
  • the common color gamut is the common color gamut triangle surrounded by the color coordinates of each color LED backlight area on the chromaticity diagram. Therefore, the target luminance chromaticity characteristic value can represent the common color gamut of each backlight area.
  • the tristimulus values representing the brightness and chromaticity characteristic values of the backlight area can be obtained by conversion based on the brightness characteristic values and chromaticity characteristic values of each backlight area.
  • the tristimulus values are respectively characterized as Among them, X, Y, Z are tristimulus values, and x, y, and Y on the right side of the equation represent color coordinates and brightness.
  • the formula for calculating the color coordinates of the tristimulus value is:
  • correction parameters of each of the backlight regions are calculated by the following formula:
  • the calibration parameters of the backlight area are used for all LED lamps in the backlight area. Correction control is performed.
  • an embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of any one of the methods described in the first aspect above.
  • the apparatus 700 may include: a processor 701 and a memory 702 .
  • the apparatus 700 may also include one or more of a multimedia component 703 , an input/output (I/O) interface 704 , and a communication component 705 .
  • the processor 701 is used to control the overall operation of the apparatus 700 to complete all or part of the steps in the above-mentioned brightness and chrominance correction method.
  • the memory 702 is used to store various types of data to support the operation of the device 700, such data may include, for example, instructions for any application or method to operate on the device 700, as well as application-related data such as contact Personal data, messages sent and received, pictures, audio, video, and more.
  • the memory 702 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (Static Random Access Memory, SRAM for short), electrically erasable programmable read-only memory ( Electrically Erasable Programmable Read-Only Memory (EEPROM for short), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • Multimedia components 703 may include screen and audio components. Wherein the screen can be, for example, a touch screen, and the audio component is used for outputting and/or inputting audio signals.
  • the audio component may include a microphone for receiving external audio signals.
  • the received audio signal may be further stored in memory 702 or transmitted through communication component 705.
  • the audio assembly also includes at least one speaker for outputting audio signals.
  • the I/O interface 704 provides an interface between the processor 701 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, a button, and the like. These buttons can be virtual buttons or physical buttons.
  • the communication component 705 is used for wired or wireless communication between the apparatus 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or one or more of them The combination is not limited here. Therefore, the corresponding communication component 705 may include: Wi-Fi module, Bluetooth module, NFC module and so on.
  • the apparatus 700 may be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), digital signal processor (Digital Signal Processor, DSP for short), digital signal processing equipment (Digital Signal Processing) Processing Device, referred to as DSPD), Programmable Logic Device (Programmable Logic Device, referred to as PLD), Field Programmable Gate Array (Field Programmable Gate Array, referred to as FPGA), controller, microcontroller, microprocessor or other electronic components , which is used to perform the above-mentioned brightness and chrominance correction method.
  • ASIC Application Specific Integrated Circuit
  • DSP Digital Signal Processor
  • DSPD Digital Signal Processing Equipment
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • controller microcontroller
  • microprocessor or other electronic components which is used to perform the above-mentioned brightness and chrominance correction method.
  • a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned brightness and chrominance correction method are implemented.
  • the computer-readable storage medium can be the above-mentioned memory 702 including program instructions, and the above-mentioned program instructions can be executed by the processor 701 of the apparatus 700 to complete the above-mentioned brightness and chrominance correction method.
  • the above-mentioned apparatus 700 may be a terminal device independent of the display.
  • the above-mentioned apparatus 700 may be integrated on a display.
  • an embodiment of the present disclosure further provides a display including the above-mentioned apparatus 700 for calibrating luminance and chromaticity.
  • the brightness and chromaticity correction system 500 includes a display 502 and a brightness and chromaticity correction device 501 communicatively connected to the display;
  • the brightness and chromaticity correction device 501 is configured to send a brightness and chromaticity correction instruction to the display after obtaining a correction parameter according to any one of the methods described above, where the brightness and chromaticity correction instruction includes the correction parameter;
  • the display 502 is configured to, in response to receiving the brightness and chromaticity correction instruction sent by the brightness and chromaticity correction device, correct the parameters of the backlight panel of the display according to the correction parameters in the brightness and chromaticity correction instruction.

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Abstract

一种亮色度校正方法、装置（501,700）、系统（500）、存储介质及显示器（502）。亮色度校正方法包括：获取显示器（502）上各背光区分别对应的亮色度图像，其中亮色度图像是在显示器（502）的透过率被配置为预设透过率的情况下拍摄的（S11）；基于各背光区分别对应的亮色度图像，确定各背光区的亮色度特征值（S12）；根据所有背光区的亮色度特征值，确定目标公共亮色度特征值（S13）；针对每一背光区，计算将该背光区的亮色度特征值调整至目标公共亮色度特征值的校正参数，该校正参数用于对对应的背光区的亮色度进行调整以使显示器（502）的背光板上各背光区的亮色度具有均一性（S14），从而提高显示器（502）上显示的图像的质量。

Description

亮色度校正方法、装置、系统，存储介质及显示器 技术领域
本公开涉及背光显示器技术领域，具体地，涉及一种亮色度校正方法、装置、系统，存储介质及显示器。
背景技术
直下式分区动态背光显示器，其背光板通常被设计为采用发光二极管LED均匀排列的阵列形式。直下式分区动态背光显示器的背光光源，可以是单色LED灯，也可以是由红绿蓝三基色组成的LED灯。
无论采用单色LED灯还是三基色LED灯，直下式分区动态背光显示器在显示一幅图像时，由于可以分别控制背光板的各分区的亮度，因此显示屏的高亮图像区域和黑暗图像区域能够达到很高的对比度，并且可以减小背光板的能耗。但是，当不同分区的LED光源辐射出的亮度或色度存在差异时，其透过显示面板所呈现在显示屏上的图像色度将会不可避免的出现均一性不一致现象，这导致显示屏上的图像质量较差。
发明内容
本公开的目的是提供一种亮色度校正方法、装置、系统，存储介质及显示器，以使得显示器的背光板上各背光区的亮色度具有均一性，从而提升显示的图像的质量。
为了实现上述目的，根据本公开实施例的第一方面，提供一种亮色度校正方法，包括：
获取显示器上各背光区分别对应的亮色度图像，其中，所述亮色度图像是在所述显示器的透过率被配置为预设透过率的情况下拍摄的；
基于各所述背光区分别对应的所述亮色度图像，确定各所述背光区的亮色度特征值；
根据所有所述背光区的所述亮色度特征值，确定目标公共亮色度特征值；
针对每一所述背光区，计算将该背光区的所述亮色度特征值调整至所述目标公共亮色度特征值的校正参数；
其中，所述校正参数用于对对应的所述背光区的亮色度进行调整，以使背光板上各所述背光区的亮色度具有均一性。
可选地，所述预设透过率包括：红色预设透过率、绿色预设透过率、蓝色预设透过率；每一所述背光区的所述亮色度图像包括该背光区的第一亮色度图像、第二亮色度图像以及第三亮色度图像，相应地，所述获取显示器上各背光区分别对应的亮色度图像，包括：
在所述显示器的透过率被配置为所述红色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第一亮色度图像；
在所述显示器的透过率被配置为所述绿色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第二亮色度图像；
在所述显示器的透过率被配置为所述蓝色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第三亮色度图像。
可选地，各所述背光区的亮色度特征值为三刺激值。
可选地，所述亮色度特征值包括亮度特征值以及色度特征值；
所述方法还包括：通过如下公式计算各亮色度图像的所述亮度特征值或所述色度特征值：
Figure PCTCN2020100710-appb-000001
其中，Fea表征背光区的所述亮度特征值或所述色度特征值，k表征该背光区的亮色度图像中像素点的个数，Gray表征该背光区的亮色度图像中各像素点的灰度值，n表征拍摄所述亮色度图像的装置的性能参 数。
可选地，所述根据所有所述背光区的所述亮色度特征值，确定目标公共亮色度特征值，包括：
根据所有所述背光区的所述亮度特征值的平均值，乘以预设系数得到所述目标公共亮色度特征值中的目标亮度特征值，其中，所述预设系数为不大于1的正数；
根据所有所述背光区的所述色度特征值，确定所有所述背光区的公共色域，所述公共色域为所述目标公共亮色度特征值中的目标色度特征值。
可选地，通过如下公式计算得到每一所述背光区的校正参数：
Figure PCTCN2020100710-appb-000002
其中，
Figure PCTCN2020100710-appb-000003
表征背光区的亮色度特征值，
Figure PCTCN2020100710-appb-000004
表征该背光区的所述校正参数，
Figure PCTCN2020100710-appb-000005
表征目标公共亮色度特征值。
根据本公开实施例的第二方面，提供一种计算机可读存储介质，其上存 储有计算机程序，该程序被处理器执行时实现上述第一方面中任一项所述方法的步骤。
根据本公开实施例的第三方面，提供一种亮色度校正装置，包括：
存储器，其上存储有计算机程序；
处理器，用于执行所述存储器中的所述计算机程序，以实现上述第一方面中任一项所述方法的步骤。
根据本公开实施例的第四方面，提供一种显示器，包括上述第三方面所述的亮色度校正装置。
根据本公开实施例的第五方面，提供一种亮色度校正系统，包括显示器以及与所述显示器通信连接的亮色度校正装置；
所述亮色度校正装置用于，在根据上述第一方面任一项所述的方法得到校正参数后，向所述显示器发送亮色度校正指令，所述亮色度校正指令包括所述校正参数；
所述显示器用于，响应于接收到所述亮色度校正装置发送的所述亮色度校正指令，根据所述亮色度校正指令中的所述校正参数对所述显示器的背光板参数进行校正。
采用上述技术方案，至少能够达到如下技术效果：
通过获取显示器上各背光区分别对应的亮色度图像，其中，该亮色度图像是在该显示器的透过率被配置为预设透过率的情况下拍摄的。基于各背光区分别对应的亮色度图像，确定各背光区的亮色度特征值。根据所有背光区的亮色度特征值，确定目标公共亮色度特征值。针对每一背光区，计算将该背光区的亮色度特征值调整至该目标公共亮色度特征值的校正参数。根据各背光区的校正参数对对应的背光区的亮色度进行调整，以使显示器的背光板上各背光区的亮色度具有均一性，从而提高显示器上显示的图像的质量。
本公开的其他特征和优点将在随后的具体实施方式部分予以详细说明。
附图说明
附图是用来提供对本公开的进一步理解，并且构成说明书的一部分，与下面的具体实施方式一起用于解释本公开，但并不构成对本公开的限制。在附图中：
图1是根据本公开一示例性实施例示出的一种亮色度校正方法的流程图。
图2是根据本公开一示例性实施例示出的一种亮色度图像与领域k的关联关系示意图。
图3是根据本公开一示例性实施例示出的一种色域空间示意图。
图4是根据本公开一示例性实施例示出的一种亮色度校正装置的框图。
图5是根据本公开一示例性实施例示出的一种亮色度校正系统的框图。
具体实施方式
以下结合附图对本公开的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本公开，并不用于限制本公开。
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
直下式分区动态背光显示器，其背光板通常被设计为采用发光二极管LED均匀排列的阵列形式。直下式分区动态背光显示器的背光光源可以是单色LED灯，也可以是由红绿蓝三基色组成的LED灯。若背光板采用单色LED灯，如蓝光灯，那么通过蓝光灯发射的蓝光激发荧光从而发射出白光，照射在显示面板上。若背光板采用红绿蓝三基色组成的LED灯，那么通过三基 色的叠加发出白光照射在显示面板上。其中，显示面板自身不具备发光性能。显示面板通过背光板的照射并通过滤色器选择性的过滤部分颜色，从而达到显示不同颜色图像的目的。
无论采用单色LED灯还是三基色LED灯，直下式分区动态背光显示器在显示一幅图像时，由于可以分别控制背光板的各分区的亮度，因此显示屏的高亮图像区域和黑暗图像区域能够达到很高的对比度，并且可以减小背光板的能耗。但是，当不同分区的LED光源辐射出的亮度或色度存在差异时，其透过显示面板所呈现在显示屏上的图像色度将会不可避免的出现均一性不一致现象，这导致显示屏上的图像质量较差。
有鉴于此，本公开实施例提供一种亮色度校正方法、装置、系统，存储介质及显示器，以使显示器的背光板上各背光区的亮色度具有均一性，从而提高显示器上显示的图像的质量。
图1是根据本公开一示例性实施例示出的一种亮色度校正方法的流程图，如图1所示，该亮色度校正方法可以包括以下步骤：
S11、获取显示器上各背光区分别对应的亮色度图像，其中，所述亮色度图像是在所述显示器的透过率被配置为预设透过率的情况下拍摄的。
其中，显示器可以为包括直下式背光板和液晶显示面板(LCD)的液晶显示器。由于针对直下式背光板显示器，可以通过将背光板上均匀分布的LED灯阵划分为多个区域，因此可以实现对背光板上的每一背光区的光强分别进行控制，从而达到提高显示器上显示的图像的对比度，以及降低显示器能耗的目的。一种可实现的背光板划分实施方式，可以将背光板划分为相同大小的多个背光区，每一背光区包括至少一个发光二极管或荧光光源。而不难理解的是，在对背光板进行分区之后，背光板的每一背光区分别对应显示器上的一个像素区域。在显示器上显示视频图像的每一帧图像时，该显示器上的每一像素区域对应显示每一帧图像中的一个图像区域。
在步骤S11中，可以获取到显示器上各背光区分别对应的亮色度图像，其中，获取到的每一背光区对应的亮色度图像不受其他背光区的影响。一种可实现的实施方式，依次针对每一背光区进行控制，并在显示器的透过率被配置为预设透过率的情况下，通过亮色度成像装置(如摄像机)拍摄得到该背光区的亮色度图像。另一种可实现的实施方式，通过隔点显示方法控制背光板上的各背光区，从而可以一次性获取到多个背光区分别对应的亮色度图像。其中，隔点显示方法具体是指间隔多个背光区后控制下一个背光区进行点亮，从而能够一次性获取到背光板上多个不相邻的背光区的亮色度图像。
应当说明的是，基于本公开技术方案的原理，获取显示器的背光板上各背光区分别对应的亮色度图像的实施方式还可以是，在背光板与显示面板组装成显示器之前，单独针对背光板，获取该背光板上每一背光区的亮色度图像。这种方式，无需控制显示器的显示面板的透过率。
S12、基于各所述背光区分别对应的所述亮色度图像，确定各所述背光区的亮色度特征值。
在获取到背光板上每一背光区的亮色度图像之后，根据各背光区的亮色度图像，可以计算得到该背光区的亮色度特征值。
一种可能的情况，在实际实施过程中，由于亮色度成像装置的拍摄平面与显示器的显示面板平面可能并非平行，或者该两个平面的中垂线位置存在偏差，因而使用亮色度成像装置拍摄得到的亮色度图像可能存在形变，因此，在基于各背光区分别对应的亮色度图像，确定各背光区的亮色度特征值之前，可以先对各背光区的亮色度图像进行图像校正处理。
具体地，先在液晶显示器上显示一幅标尺图像，通过亮色度成像装置拍摄该标尺图像得到待校正图像。接着，使用图像处理或图像识别算法提取该待校正图像的特征点的位置信息。进一步地，根据该标尺图像上对应待校正图像的特征点的已知位置信息和待校正图像上的特征点位置信息计算得到 液晶显示面板与亮色度成像装置的映射转换参数。例如该映射转换参数可以为
Figure PCTCN2020100710-appb-000006
运用该映射转换参数可以修正亮色度成像装置拍摄到的各背光区的亮色度图像。例如通过如下计算公式修正各背光区的亮色度图像：
Figure PCTCN2020100710-appb-000007
其中，u、v是亮色度成像装置拍摄到的各背光区的亮色度图像中各像素点的坐标，通过上述计算公式对应得到修正后的该像素点的坐标x、y，其中x＝x′/w′、y＝y′/w′，W为常数。
采用这种修正方式，使得修正后的各背光区的亮色度图像与显示器上显示的图像更加匹配。避免了实施过程中的拍摄角度误差。
S13、根据所有所述背光区的所述亮色度特征值，确定目标公共亮色度特征值。
在确定各背光区的亮色度特征值之后，可以根据所有背光区的亮色度特征值，确定目标公共亮色度特征值。
S14、针对每一所述背光区，计算将该背光区的所述亮色度特征值调整至所述目标公共亮色度特征值的校正参数；其中，所述校正参数用于对对应的所述背光区的亮色度进行调整，以使背光板上各所述背光区的亮色度具有均一性。
其中，均一性具体指各背光区亮度均匀、色度空间一致，即，各背光区具有相同的亮度和相同的色度空间。表现为同一显示源信号对应在显示器上 显示的图像的色品一致。
在确定各背光区的亮色度特征值以及目标公共亮色度特征值之后，可以针对每一背光区，计算将该背光区的亮色度特征值调整至该目标公共亮色度特征值的校正参数，如此可以得到显示器的背光板上各背光区的校正参数。
采用这种方式，通过获取显示器上各背光区分别对应的亮色度图像，其中，该亮色度图像是在该显示器的透过率被配置为预设透过率的情况下拍摄的。基于各背光区分别对应的亮色度图像，确定各背光区的亮色度特征值。根据所有背光区的亮色度特征值，确定目标公共亮色度特征值。针对每一背光区，计算将该背光区的亮色度特征值调整至该目标公共亮色度特征值的校正参数。根据各背光区的校正参数对对应的背光区的亮色度进行调整，以使显示器的背光板上各背光区的亮色度具有均一性，从而提高显示器上显示的图像的质量。
可选地，所述预设透过率包括：红色预设透过率、绿色预设透过率、蓝色预设透过率；每一所述背光区的所述亮色度图像包括该背光区的第一亮色度图像、第二亮色度图像以及第三亮色度图像，相应地，所述获取显示器上各背光区分别对应的亮色度图像，包括以下步骤：
在所述显示器的透过率被配置为所述红色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第一亮色度图像；
在所述显示器的透过率被配置为所述绿色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第二亮色度图像；
在所述显示器的透过率被配置为所述蓝色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第三亮色度图像。
一种可实现的实施方式，可以在摄像机获取到所有背光区的亮色度图像之后，从摄像机获取每一背光区的亮色度图像。也可以实时与摄像机进行交互，同步摄像机获取每一背光区的亮色度图像。
不难理解的是，不管背光板上的LED灯为三基色LED灯还是单色LED灯时，均可以在将显示器的透过率依次被配置为红色预设透过率、绿色预设透过率、蓝色预设透过率的情况下，通过摄像机拍摄得到各背光区单独点亮时的第一亮色度图像、第二亮色度图像以及第三亮色度图像。其中，第一亮色度图像为红色的色度图像，第二亮色度图像为绿色的色度图像，第三亮色度图像为蓝色的色度图像。
应当理解的是，三基色红绿蓝的不同配比对应呈现不同的颜色。因此，采用上述亮色度校正方法，针对背光板上的LED灯的亮色度进行校正时，需要从红绿蓝三个色度进行校正。此处需说明的是，当背光板上的LED灯为三基色LED灯时，各所述背光区的亮色度特征值为三刺激值。其中，三刺激值tristimulus values是引起人体视网膜对某种颜色感觉的三种原色的刺激程度之量的表示。当背光板上的LED灯为单色LED灯时，各所述背光区的亮色度特征值为亮度值。
可选地，所述亮色度特征值包括亮度特征值以及色度特征值。一种可实现的实施方式中，通过如下公式计算各亮色度图像的所述亮度特征值或所述色度特征值：
Figure PCTCN2020100710-appb-000008
其中，Fea表征背光区的所述亮度特征值或所述色度特征值，k表征该背光区的亮色度图像中像素点的个数，Gray表征该背光区的亮色度图像中各像素点的灰度值，n表征拍摄所述亮色度图像的装置的性能参数。
一种可能的方式，上述公式中的参数k与背光区的亮色度图像之间的关系可以如图2所示。具体地，图2中的圆形区域表征一个背光区的亮色度图像，整个方形区域为上述计算公式中参数k的领域。其中，k表征识别亮色度图像的轮廓领域。本领域普通技术人员应当理解的是，在去除了亮色度图 像中的背景噪声后，该图像的识别轮廓领域应当大于或等于该亮色度图像区域。
应当说明的是，当背光板上的LED灯为单色LED灯时，各所述背光区的亮色度特征值为亮度值，通过上述计算公式可以计算得到每一背光区的亮度特征值。而当背光板上的LED灯为三基色LED灯时，各背光区的亮色度特征值为三刺激值，包括该背光区的亮度信息和色度信息。即此种情况下，背光区的亮色度特征值为一个3*3数组。具体地，通过分别针对第一亮色度图像、第二亮色度图像、第三亮色度图像，计算得到基于三基色的三刺激值可以表征为
Figure PCTCN2020100710-appb-000009
其中，Xr、Yr、Zr表征背光区的亮色度特征值中的红色三刺激值，Xg、Yg、Zg表征背光区的亮色度特征值中的绿色三刺激值，Xb、Yb、Zb表征背光区的亮色度特征值中的蓝色三刺激值。
当背光板上的LED灯为三基色LED灯时，可以通过上述计算公式分别计算背光区的亮度特征值和色度特征值。
可选地，所述根据所有所述背光区的所述亮色度特征值，确定目标公共亮色度特征值，具体可以是根据所有所述背光区的所述亮度特征值的平均值，乘以预设系数得到所述目标公共亮色度特征值中的目标亮度特征值，其中，所述预设系数为不大于1的正数；根据所有所述背光区的所述色度特征值，确定所有所述背光区的公共色域，所述公共色域为所述目标公共亮色度特征值中的目标色度特征值。
换言之，根据所有背光区的亮度特征值，可以确定整个显示器的背光板的目标亮度特征值，在实施时，可以将所有背光区的亮度特征值的平均值乘以预设系数得到目标公共亮色度特征值中的目标亮度特征值。基于类似的计 算原理，还可以是基于所有背光区的亮度特征值，采用其他统计方式确定目标亮度特征值。其他统计方式为加权、直方统计等等。
根据所有背光区的色度特征值，确定目标公共亮色度特征值中的目标色度特征值，具体是根据所有背光区的色度特征值，确定所有背光区的色域的交集。参见图3，图3为一个背光区的RGB色坐标包围的色域。而公共色域是各彩色LED背光区在色品图上色坐标包围的公共色域三角形。因此，目标亮色度特征值可以表征各背光区的公共色域。
应当理解的是，由于各背光区的亮色度特征值为三刺激值，因此，基于各背光区的亮度特征值和色度特征值可以换算得到表征该背光区的亮色度特征值的三刺激值。相关技术中，三刺激值分别表征为
Figure PCTCN2020100710-appb-000010
其中，X、Y、Z为三刺激值，等式右侧的x、y、Y表征色坐标和亮度。三刺激值转色坐标的计算公式为
Figure PCTCN2020100710-appb-000011
应当说明的是，在确定目标公共亮色度之后，还需要确定白平衡色温和调整后最大亮度对应的目标基色的亮度与配比，从而保证校正后的色温和亮度满足实际需求。
可选地，通过如下公式计算得到每一所述背光区的校正参数：
Figure PCTCN2020100710-appb-000012
其中，
Figure PCTCN2020100710-appb-000013
表征背光区的亮色度特征值，
Figure PCTCN2020100710-appb-000014
表征该背光区的所述校正参数，其中，Crr为显示源信号为红色时，红灯的亮度系数；Cgr为显示源信号为红色时，绿灯的亮度系数；Cbr为显示源信号为红色时，蓝灯的亮度系数；Crg为显示源信号为绿色时，红灯的亮度系数；Cgg为显示源信号为绿色时，绿灯的亮度系数；Cbg为显示源信号为绿色时，蓝灯的亮度系数；Crb为显示源信号为蓝色时，红灯的亮度系数；Cgb为显示源信号为蓝色时，绿灯的亮度系数；Cbb为显示源信号为蓝色时，蓝灯的亮度系数，
Figure PCTCN2020100710-appb-000015
表征目标公共亮色度特征值，其中，Xr1、Yr1、Zr1表征背光区的目标公共亮色度特征值中的红色三刺激值，Xg1、Yg1、Zg1表征背光区的目标公共亮色度特征值中的绿色三刺激值，Xb1、Yb1、Zb1表征背光区的目标亮色度特征值中的蓝色三刺激值。
应当说明的是，当背光区中包括多个LED灯时，对该背光区内的所有 LED灯，均采用该背光区的所述校正参数
Figure PCTCN2020100710-appb-000016
进行校正控制。
基于同一发明构思，本公开实施例还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现上述第一方面中任一项所述方法的步骤。
本公开实施例还提供一种亮色度校正装置，如图4所示，该装置700可以包括：处理器701，存储器702。该装置700还可以包括多媒体组件703，输入/输出(I/O)接口704，以及通信组件705中的一者或多者。
其中，处理器701用于控制该装置700的整体操作，以完成上述的亮色度校正方法中的全部或部分步骤。存储器702用于存储各种类型的数据以支持在该装置700的操作，这些数据例如可以包括用于在该装置700上操作的任何应用程序或方法的指令，以及应用程序相关的数据，例如联系人数据、收发的消息、图片、音频、视频等等。该存储器702可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，例如静态随机存取存储器(Static Random Access Memory，简称SRAM)，电可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，简称EEPROM)，可擦除可编程只读存储器(Erasable Programmable Read-Only Memory，简称EPROM)，可编程只读存储器(Programmable Read-Only Memory，简称PROM)，只读存储器(Read-Only Memory，简称ROM)，磁存储器，快闪存储器，磁盘或光盘。多媒体组件703可以包括屏幕和音频组件。其中屏幕例如可以是触摸屏，音频组件用于输出和/或输入音频信号。例如，音频组件可以包括一个麦克风，麦克风用于接收外部音频信号。所接收的音频信号可 以被进一步存储在存储器702或通过通信组件705发送。音频组件还包括至少一个扬声器，用于输出音频信号。I/O接口704为处理器701和其他接口模块之间提供接口，上述其他接口模块可以是键盘，鼠标，按钮等。这些按钮可以是虚拟按钮或者实体按钮。通信组件705用于该装置700与其他设备之间进行有线或无线通信。无线通信，例如Wi-Fi，蓝牙，近场通信(Near Field Communication，简称NFC)，2G、3G、4G、NB-IOT、eMTC、或其他5G等等，或它们中的一种或几种的组合，在此不做限定。因此相应的该通信组件705可以包括：Wi-Fi模块，蓝牙模块，NFC模块等等。
在一示例性实施例中，装置700可以被一个或多个应用专用集成电路(Application Specific Integrated Circuit，简称ASIC)、数字信号处理器(Digital Signal Processor，简称DSP)、数字信号处理设备(Digital Signal Processing Device，简称DSPD)、可编程逻辑器件(Programmable Logic Device，简称PLD)、现场可编程门阵列(Field Programmable Gate Array，简称FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述的亮色度校正方法。
在另一示例性实施例中，还提供了一种包括程序指令的计算机可读存储介质，该程序指令被处理器执行时实现上述的亮色度校正方法的步骤。例如，该计算机可读存储介质可以为上述包括程序指令的存储器702，上述程序指令可由装置700的处理器701执行以完成上述的亮色度校正方法。
示例地，上述装置700可以为独立于显示器之外的终端设备。一种可实现的实施方式中，上述装置700可以被集成于显示器上。
因此，本公开实施例还提供一种显示器，包括上述亮色度校正装置700。
本公开实施例还提供一种亮色度校正系统，参见图5，亮色度校正系统500包括显示器502以及与所述显示器通信连接的亮色度校正装置501；
所述亮色度校正装置501用于，在根据上述任一项所述的方法得到校正 参数后，向所述显示器发送亮色度校正指令，所述亮色度校正指令包括所述校正参数；
所述显示器502用于，响应于接收到所述亮色度校正装置发送的亮色度校正指令，根据所述亮色度校正指令中的校正参数对所述显示器的背光板参数进行校正。
以上结合附图详细描述了本公开的优选实施方式，但是，本公开并不限于上述实施方式中的具体细节，在本公开的技术构思范围内，可以对本公开的技术方案进行多种简单变型，这些简单变型均属于本公开的保护范围。
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合。为了避免不必要的重复，本公开对各种可能的组合方式不再另行说明。
此外，本公开的各种不同的实施方式之间也可以进行任意组合，只要其不违背本公开的思想，其同样应当视为本公开所公开的内容。

Claims (10)

  1. 一种亮色度校正方法，其特征在于，包括：
    获取显示器上各背光区分别对应的亮色度图像，其中，所述亮色度图像是在所述显示器的透过率被配置为预设透过率的情况下拍摄的；
    基于各所述背光区分别对应的所述亮色度图像，确定各所述背光区的亮色度特征值；
    根据所有所述背光区的所述亮色度特征值，确定目标公共亮色度特征值；
    针对每一所述背光区，计算将该背光区的所述亮色度特征值调整至所述目标公共亮色度特征值的校正参数；
    其中，所述校正参数用于对对应的所述背光区的亮色度进行调整，以使背光板上各所述背光区的亮色度具有均一性。
  2. 根据权利要求1所述的方法，其特征在于，所述预设透过率包括：红色预设透过率、绿色预设透过率、蓝色预设透过率；每一所述背光区的所述亮色度图像包括该背光区的第一亮色度图像、第二亮色度图像以及第三亮色度图像，相应地，所述获取显示器上各背光区分别对应的亮色度图像，包括：
    在所述显示器的透过率被配置为所述红色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第一亮色度图像；
    在所述显示器的透过率被配置为所述绿色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第二亮色度图像；
    在所述显示器的透过率被配置为所述蓝色预设透过率的情况下，获取所述显示器上各所述背光区分别对应的所述第三亮色度图像。
  3. 根据权利要求2所述的方法，其特征在于，各所述背光区的亮色度 特征值为三刺激值。
  4. 根据权利要求1-3中任一项所述的方法，其特征在于，所述亮色度特征值包括亮度特征值以及色度特征值；
    所述方法还包括：通过如下公式计算各亮色度图像的所述亮度特征值或所述色度特征值：
    Figure PCTCN2020100710-appb-100001
    其中，Fea表征背光区的所述亮度特征值或所述色度特征值，k表征该背光区的亮色度图像中像素点的个数，Gray表征该背光区的亮色度图像中各像素点的灰度值，n表征拍摄所述亮色度图像的装置的性能参数。
  5. 根据权利要求4所述的方法，其特征在于，所述根据所有所述背光区的所述亮色度特征值，确定目标公共亮色度特征值，包括：
    根据所有所述背光区的所述亮度特征值的平均值，乘以预设系数得到所述目标公共亮色度特征值中的目标亮度特征值，其中，所述预设系数为不大于1的正数；
    根据所有所述背光区的所述色度特征值，确定所有所述背光区的公共色域，所述公共色域为所述目标公共亮色度特征值中的目标色度特征值。
  6. 根据权利要求3所述的方法，其特征在于，通过如下公式计算得到每一所述背光区的校正参数：
    Figure PCTCN2020100710-appb-100002
    其中，
    Figure PCTCN2020100710-appb-100003
    表征背光区的亮色度特征值，
    Figure PCTCN2020100710-appb-100004
    表征该背光区的所述校正参数，
    Figure PCTCN2020100710-appb-100005
    表征目标公共亮色度特征值。
  7. 一种计算机可读存储介质，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现权利要求1-6中任一项所述方法的步骤。
  8. 一种亮色度校正装置，其特征在于，包括：
    存储器，其上存储有计算机程序；
    处理器，用于执行所述存储器中的所述计算机程序，以实现权利要求1-6中任一项所述方法的步骤。
  9. 一种显示器，其特征在于，包括权利要求8所述的亮色度校正装置。
  10. 一种亮色度校正系统，其特征在于，包括显示器以及与所述显示器通信连接的亮色度校正装置；
    所述亮色度校正装置用于，在根据权利要求1-6中任一项所述的方法得 到校正参数后，向所述显示器发送亮色度校正指令，所述亮色度校正指令包括所述校正参数；
    所述显示器用于，响应于接收到所述亮色度校正装置发送的所述亮色度校正指令，根据所述亮色度校正指令中的所述校正参数对所述显示器的背光板参数进行校正。
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