WO2019237837A1 - 图像处理方法、装置、显示设备及计算机存储介质 - Google Patents

图像处理方法、装置、显示设备及计算机存储介质 Download PDF

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Publication number
WO2019237837A1
WO2019237837A1 PCT/CN2019/084227 CN2019084227W WO2019237837A1 WO 2019237837 A1 WO2019237837 A1 WO 2019237837A1 CN 2019084227 W CN2019084227 W CN 2019084227W WO 2019237837 A1 WO2019237837 A1 WO 2019237837A1
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Prior art keywords
brightness
target
image processing
target area
original display
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PCT/CN2019/084227
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English (en)
French (fr)
Inventor
兰传艳
吴国强
喻勇
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京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Priority to US16/621,315 priority Critical patent/US11380275B2/en
Publication of WO2019237837A1 publication Critical patent/WO2019237837A1/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
    • G09G3/36—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/90—Determination of colour characteristics
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • 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
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the 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
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present disclosure relates to the field of liquid crystal display technology, and in particular, to an image processing method, device, display device, and computer storage medium.
  • active-matrix organic light-emitting diodes (AMOLED) panels have the characteristics of faster response speed, higher contrast, wider viewing angle, and lower power consumption.
  • An image processing method includes:
  • the determining a target area in the original display screen includes:
  • An average grayscale value in a region of the original display picture is greater than an average grayscale value of the original display picture, and a difference between the average grayscale value of the region and the average grayscale value of the original display picture
  • the area is determined as the target area.
  • the determining a target gray level of the target area includes:
  • the target gray level is determined according to a relationship between the brightness and the gray level, the initial brightness, and the target brightness.
  • determining the target gray level of the target area according to a relationship between gray levels and luminance, and the initial luminance and the target luminance includes:
  • L is the target brightness
  • G is the target gray level
  • A is the initial brightness
  • An image processing device includes:
  • a receiving module configured to receive an original display screen
  • a first determining module configured to determine a target area in the original display screen, wherein the original brightness of the target area is greater than a maximum allowable brightness
  • a second determining module configured to determine a target gray level of the target area
  • the adjustment module is configured to adjust a grayscale value of the target region to the target grayscale so that the brightness of the target region does not exceed the maximum allowable brightness.
  • the first determining module includes:
  • the first determining unit is configured to have an average grayscale value in a region of the original display screen greater than an average grayscale value of the original display screen, and an average grayscale value of the region and an average of the original display screen.
  • the difference between the grayscale values is greater than a preset threshold, the area is determined as the target area.
  • the second determining module includes:
  • a second determining unit configured to determine an initial brightness and a target brightness of the target area, wherein the target brightness is not greater than the maximum allowable brightness
  • the third determining unit is configured to determine the target grayscale according to a relationship between the brightness and the grayscale, the initial brightness, and the target brightness.
  • the third determining unit includes:
  • L is the target brightness
  • G is the target gray level
  • A is the initial brightness
  • An image processing device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the computer program is executed by the processor, the image processing device is implemented. Steps in the method.
  • a display device includes the image processing apparatus as described above.
  • a computer storage medium stores a computer program that, when executed by a processor, implements steps in the image processing method described above.
  • FIG. 1 is a flowchart of an image processing method provided by some embodiments of the present disclosure
  • FIG. 2 is a schematic diagram of an original display screen in the related art
  • FIG. 3 is a schematic diagram of a relationship curve between a brightness increment ratio and a gray scale of a target region in the scenario shown in FIG. 2;
  • FIG. 5 is a relationship curve between the brightness increment and the gray scale of the target region of the scenario shown in FIG. 4;
  • FIG. 6 is a flowchart of an image processing method according to another embodiment of the present disclosure.
  • FIG. 7a is a schematic diagram of an original display screen provided by some embodiments of the present disclosure.
  • FIG. 7b is a graph of grayscale and brightness of the original display screen shown in FIG. 7a;
  • FIG. 8a is a schematic diagram of an original display screen provided by some other embodiments of the present disclosure.
  • FIG. 8b is a graph of grayscale and brightness of the original display screen shown in FIG. 8a;
  • FIG. 9 is a schematic structural diagram of an image processing apparatus according to some embodiments of the present disclosure.
  • FIG. 10 is a schematic structural diagram of an image processing apparatus according to another embodiment of the present disclosure.
  • the AMOLED panel in the related art uses a compensation circuit to improve conditions such as MURA (Mura refers to the phenomenon that the brightness of the display is uneven and causes various traces). The brightness of some specific screens is abnormal, which not only affects the user experience but also affects the life of the AMOLED panel.
  • MURA MURA
  • FIG. 1 is a flowchart of an image processing method provided by some embodiments of the present disclosure.
  • the image processing method includes steps 101, 102, 103, and 104.
  • step 101 an original display screen is received.
  • the original display picture is data such as a picture or a video.
  • the embodiment of the present disclosure does not limit the type of the original display screen.
  • step 102 a target area to be adjusted in the original display screen is determined, wherein the original brightness of the target area is greater than the maximum allowable brightness.
  • the maximum allowable brightness indicates the maximum brightness that can be displayed by a device (for example, an AMOLED panel) for displaying an original display screen.
  • the maximum allowable brightness is set to 300 nit (corresponding to Gray 255), and it is set before shipment.
  • the target area is an area where the original brightness is greater than the maximum allowable brightness in the original display picture.
  • FIG. 2 is a schematic diagram of an original display screen 20 in the related art.
  • the background color of the original display screen 20 is black, but there is a highlight region 21 in the center of the original display screen 20, and the highlight region 21 is large. It occupies about 1/25 of the original display screen 20.
  • the maximum allowable brightness is 300nit (corresponding to Gray 255) and the corresponding brightness when the background color is white (that is, the maximum allowable brightness) is 300nit, however, the brightness of the highlight area 21 is 400nit and the brightness of the highlight area 21 is greater than The maximum allowable brightness is 300 nit.
  • the highlight area 21 is determined as the target area, and Table 1 is obtained based on the above data.
  • FIG. 4 is a schematic diagram of an original display screen 40 of the related art.
  • the background color of the original display screen 40 is gray (corresponding to Gray128), but there is a highlighted area 41 in the center of the original display screen 40.
  • the bright area 41 occupies approximately 1/25 of the original display screen 40. If the maximum allowable brightness is 300nit (corresponding to Gray 255) and the corresponding brightness is 300nit when the background color is white, however, the brightness of the highlight area 41 is 350nit and the brightness of the highlight area 41 is greater than the maximum allowable brightness of 300nit. At this time, the highlighted area 41 may be determined as the target area. According to the above data, the relationship curve between the brightness increment and the gray level of the target area can be obtained, see FIG. 5.
  • step 103 a target gray level of the target area is determined.
  • the target gray level refers to a gray level value that can ensure that the brightness of the target area does not exceed the maximum allowable brightness.
  • the determining a target gray level of the target area includes:
  • step 104 the grayscale value of the target region is adjusted to the target grayscale so that the brightness of the target region does not exceed the maximum allowable brightness.
  • the area is determined as a target area to be adjusted, and the target area is obtained.
  • the brightness of the target area does not exceed the target gray level of the maximum allowable brightness, and the gray level value of the target area is adjusted to the target gray level, so that the brightness of the target area is adjusted below the maximum allowable brightness, and the length is extended. It increases product life and improves user experience.
  • FIG. 6 is a flowchart of an image processing method provided by some embodiments of the present disclosure. Referring to FIG. 6, the image processing method includes steps 601, 602, 603, 604, and 605.
  • step 601 an original display picture is received.
  • the original display picture is data such as a picture or a video.
  • the disclosed embodiment does not limit the kind of the original display screen.
  • an average grayscale value of a region of the original display picture is greater than an average grayscale value of the original display picture, and an average grayscale value of the area is equal to an average grayscale value of the original display picture.
  • the area is determined as a target area.
  • the target area is an area where the original brightness is greater than the maximum allowable brightness in the original display picture.
  • the maximum allowable brightness indicates the maximum brightness that can be displayed by a device (for example, an AMOLED panel) that displays an original display screen.
  • the maximum allowable brightness is set to 300 nit (corresponding to Gray 255), and it is set before shipment.
  • step 603 an initial brightness and a target brightness of the target area are determined, wherein the target brightness is not greater than the maximum allowable brightness.
  • a target gray level of the target area is determined according to a relationship between the brightness and the gray level, the initial brightness, and the target brightness.
  • the initial brightness and target brightness of the target area are substituted into the following calculation formula (1) to determine a target gray level of the target area;
  • L is the target brightness of the target area
  • G is the target gray level of the target area
  • A is the initial brightness of the target area
  • the target gray level refers to a gray level value that can ensure that the brightness of the target area does not exceed the maximum allowable brightness.
  • the initial brightness of the target area is 400nit
  • the maximum allowable brightness is 300nit
  • the maximum allowable brightness is set as the target brightness. Then the above parameter values are substituted into the above formula to obtain
  • the maximum allowable brightness is 65.8nit
  • step 605 the grayscale value of the target area is adjusted to the target grayscale so that the brightness of the target area does not exceed the maximum allowable brightness.
  • the image processing method further includes:
  • the grayscale and brightness curve graphs of the original display screen are counted, and then the average grayscale value of the original display screen and the average grayscale of the target area are determined according to the grayscale and brightness curve graphs of the original display screen. Order value.
  • the brightness and grayscale are determined according to the overall grayscale value of the image and the DBV setting value.
  • the original display picture is a video
  • an average grayscale value of each frame image in the video is calculated, and an average value of average grayscale values of all frame images in the video is used as an average grayscale value of the original display picture.
  • FIG. 7b is a graph of the grayscale and brightness of the original display screen shown in FIG. 7a.
  • the average grayscale value of the original display screen shown in FIG. 7b is 72.
  • FIG. 8b is a graph of the grayscale and brightness of the original display screen shown in FIG. 8a.
  • the average grayscale value of the original display screen shown in FIG. 8a is 217.
  • the area is determined as the target area, and the relationship between the brightness and the gray scale may be further determined according to the relationship.
  • the target brightness, and the initial brightness to obtain a target gray level that enables the brightness of the target area not to exceed the maximum allowable brightness, and adjust the gray level value of the target area to the target gray level In this way, the brightness of the target area is adjusted below the maximum allowable brightness, which extends the life of the product and improves the user experience.
  • FIG. 9 is a schematic diagram of an image processing apparatus according to an embodiment of the present disclosure.
  • the image processing apparatus 900 includes a receiving module 901, a first determining module 902, a second determining module 903, and an adjusting module 904.
  • the receiving module 901 is configured to receive an original display picture.
  • the first determining module 902 is configured to determine a target area in the original display screen, wherein the original brightness of the target area is greater than a maximum allowable brightness.
  • the second determining module 903 is configured to determine a target gray level of the target area.
  • the adjustment module 904 is configured to adjust the grayscale value of the target area to the target grayscale, so that the brightness of the target area does not exceed the maximum allowable brightness.
  • the first determination module 902 includes a first determination unit.
  • the first determining unit is configured such that an average grayscale value in a region of the original display picture is greater than an average grayscale value of the original display picture, and an average grayscale value of the region is equal to an average of the original display picture.
  • the difference between the grayscale values is greater than a preset threshold, the area is determined as the target area.
  • the second determination module 903 includes a second determination unit and a third determination unit.
  • the second determining unit is configured to determine an initial brightness and a target brightness of the target area, wherein the target brightness is not greater than the maximum allowable brightness.
  • the third determining unit is configured to determine the target grayscale according to a relationship between grayscale and brightness, the initial brightness, and the target brightness.
  • the third determining unit includes a determining subunit.
  • L is the target brightness of the target area
  • G is the target gray level of the target area
  • A is the initial brightness of the target area
  • the foregoing image processing apparatus can implement the processes implemented in the method embodiments of FIG. 1 and FIG. 6. To avoid repetition, details are not described herein again.
  • the first determination module 902 determines the area as a target area to be adjusted.
  • a second determination module 903 is used to obtain a target gray level that can make the brightness of the target area not exceed the maximum allowable brightness, and adjust the gray level value of the target area to the target gray level by the adjustment module 904.
  • the brightness of the target area is adjusted below the maximum allowable brightness, which extends the life of the product and improves the user experience.
  • the image processing apparatus 1000 includes a memory 1001, a processor 1002, and a computer program stored on the memory 1001 and executable on the processor 1002. , When the computer program is executed by the processor, the steps in the image processing method according to any one of the foregoing are implemented.
  • Some embodiments of the present disclosure provide a display device including the image processing apparatus as described above.
  • the display device is a device that displays data such as an image or a video, such as a mobile phone, a computer, or a tablet computer.
  • Some embodiments of the present disclosure also provide a computer storage medium.
  • a computer program is stored on the computer storage medium.
  • the steps of the image processing method are implemented.
  • the computer storage medium is a computer-readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • magnetic disk such as a hard disk, a hard disk, or an optical disk.

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Abstract

提供了一种图像处理方法、装置、显示设备及计算机存储介质，图像处理方法包括：接收原始显示画面；确定所述原始显示画面中的目标区域，其中，所述目标区域的原始亮度大于最大允许亮度；确定所述目标区域的目标灰阶；以及将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。

Description

图像处理方法、装置、显示设备及计算机存储介质
相关申请的交叉引用
本申请主张在2018年6月11日在中国提交的中国专利申请号No.201810596620.4的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及液晶显示技术领域，特别涉及一种图像处理方法、装置、显示设备及计算机存储介质。
背景技术
相比于液晶面板，有源矩阵有机发光二极体(Active-matrix organic light emitting diode，AMOLED)面板具有反应速度较快、对比度高、视角更广且功耗更低等特点。
发明内容
一种图像处理方法包括：
接收原始显示画面；
确定所述原始显示画面中的目标区域，其中，所述目标区域的原始亮度大于最大允许亮度；
确定所述目标区域的目标灰阶；以及
将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
一些实施例中，所述确定所述原始显示画面中的目标区域，包括：
在所述原始显示画面的一区域的平均灰阶值大于所述原始显示画面的平均灰阶值，且所述区域的平均灰阶值与所述原始显示画面的平均灰阶值之间的差值大于预设阈值时，将所述区域确定为所述目标区域。
一些实施例中，所述确定所述目标区域的目标灰阶，包括：
确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于 所述最大允许亮度；以及
根据亮度和灰阶之间的关系、所述初始亮度以及所述目标亮度，确定所述目标灰阶。
一些实施例中，所述根据灰阶和亮度之间的关系，以及所述初始亮度和所述目标亮度，确定所述目标区域的目标灰阶，包括：
根据所述初始亮度、所述目标亮度、以及所述灰阶和亮度之间的关系L＝A*(G/255) 2.2，确定所述目标灰阶；
其中，L为所述目标亮度，G为所述目标灰阶，以及A为所述初始亮度。
一种图像处理装置，包括：
接收模块，设置为接收原始显示画面；
第一确定模块，设置为确定所述原始显示画面中的目标区域，其中，所述目标区域的原始亮度大于最大允许亮度；
第二确定模块，设置为确定所述目标区域的目标灰阶；以及
调整模块，设置为将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
一些实施例中，所述第一确定模块包括：
第一确定单元，设置为在所述原始显示画面的一区域的平均灰阶值大于所述原始显示画面的平均灰阶值，且所述区域的平均灰阶值与所述原始显示画面的平均灰阶值之间的差值大于预设阈值时，将所述区域确定为所述目标区域。
一些实施例中，所述第二确定模块包括：
第二确定单元，设置为确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于所述最大允许亮度；以及
第三确定单元，设置为根据亮度和灰阶之间的关系、所述初始亮度以及所述目标亮度，确定所述目标灰阶。
一些实施例中，所述第三确定单元包括：
确定子单元，设置为根据所述初始亮度、所述目标亮度以及所述灰阶和亮度之间的关系L＝A*(G/255) 2.2，确定所述目标灰阶；
其中，L为所述目标亮度，G为所述目标灰阶，以及A为所述初始亮度。
一种图像处理装置包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现任一项所述的图像处理方法中的步骤。
一种显示设备包括如上所述的图像处理装置。
一种计算机存储介质存储有计算机程序，所述计算机程序被处理器执行时实现如上所述的图像处理方法中的步骤。
附图说明
图1为本公开一些实施例提供的一种图像处理方法的流程图；
图2为相关技术中原始显示画面的示意图；
图3为图2所示情景的目标区域的亮度增量比率和灰阶的关系曲线示意图；
图4为相关技术中另一原始显示画面的示意图；
图5为图4所示情景的目标区域的亮度增量和灰阶的关系曲线；
图6为本公开另一些实施例提供的图像处理方法的流程图；
图7a为本公开一些实施例提供的一张原始显示画面示意图；
图7b为图7a中所示的原始显示画面的灰阶与亮度的曲线图；
图8a为本公开另一些实施例提供的一张原始显示画面示意图；
图8b为图8a中所示的原始显示画面的灰阶与亮度的曲线图；
图9为本公开一些实施例提供的一种图像处理装置的结构示意图；以及
图10为本公开另一些实施例提供的一种图像处理装置的结构示意图。
具体实施方式
为使本公开的技术方案和特点更加清楚，下面将结合附图对一些实施例进行详细描述。
本公开的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本公开的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。
相关技术中的AMOLED面板使用补偿电路以改善MURA(MURA是指显示器亮度不均匀，造成各种痕迹的现象)等状况，但是由于补偿电路内部的供电电路中存在电压压降，导致AMOLED面板在显示一些特定画面时亮度异常，不但影响用户体验也影响到AMOLED面板的寿命。
图1为本公开一些实施例提供的一种图像处理方法的流程图，参见图1，该图像处理方法包括步骤101、步骤102、步骤103以及步骤104。
步骤101中，接收原始显示画面。
在本公开一些实施例中，所述原始显示画面为图片或视频等数据。本公开实施例中并不限定所述原始显示画面的种类。
步骤102中，确定所述原始显示画面中待调整的目标区域，其中，所述目标区域的原始亮度大于最大允许亮度。
其中，所述最大允许亮度表示用于显示原始显示画面的装置(例如，AMOLED面板)所能允许显示的最大亮度。
例如：将所述最大允许亮度设置为300nit(对应灰阶(Gray)255)，并在出厂前进行设置。
所述目标区域为在所述原始显示画面中原始亮度大于最大允许亮度的区域。
例如：图2为相关技术中的一种原始显示画面20的示意图，参见图2，原始显示画面20的背景颜色为黑色，但在原始显示画面20中心存在高亮区域21，高亮区域21大约占原始显示画面20的1/25。假若所述最大允许亮度为300nit(对应Gray 255)，背景颜色为白色时所对应的亮度(即最大允许亮度)为300nit，然而，高亮区域21的亮度为400nit，高亮区域21的亮度大于最大允许亮度300nit，此时，将高亮区域21确定为目标区域，根据以上述数据计算得到表1。
表1
Figure PCTCN2019084227-appb-000001
根据以上数据，可以得到目标区域的亮度增量比率(100/300＝0.333)和灰阶的关系曲线，参见图3。
又例如：图4为相关技术的一种原始显示画面40的示意图，参见图4，原始显示画面40的背景颜色为灰色(对应Gray128)，但在原始显示画面40中心存在高亮区域41，高亮区域41大约占原始显示画面40的1/25。假若所述最大允许亮度为300nit(对应Gray 255)，背景颜色为白色时所对应的亮度为300nit，然而，高亮区域41的亮度为350nit，高亮区域41的亮度大于最大允许亮度300nit，此时，可将高亮区域41确定为目标区域。根据以上数据，可以得到目标区域的亮度增量和灰阶的关系曲线，参见图5。
步骤103中，确定所述目标区域的目标灰阶。
在本公开实施例中，所述目标灰阶是指能保证所述目标区域的亮度不超过最大允许亮度的灰阶值。
一些实施例中，所述确定所述目标区域的目标灰阶，包括：
确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于所述最大允许亮度；以及根据亮度和灰阶之间的关系、所述初始亮度以及所述目标亮度，确定所述目标灰阶。
步骤104中，将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
在本公开所述实施例中，接收原始显示画面后，若在原始显示画面中存在原始亮度大于最大允许亮度的区域时，将该区域确定为待调整的目标区域，求得使得所述目标区域的亮度不超过所述最大允许亮度的目标灰阶，并将所述目标区域的灰阶值调整为所述目标灰阶，这样将所述目标区域的亮度调整到所述最大允许亮度以下，延长了产品的寿命，同时提升了用户体验。
将上述图像处理方法应用于AMOLED时，解决了AMOLED面板由于内部供电电路中存在电压压降而导致的特定画面亮度异常(不准)的问题。
图6为本公开一些实施例提供一种图像处理方法的流程图，参见图6，该图像处理方法包括步骤601、步骤602、步骤603、步骤604以及步骤605。
步骤601中，接收原始显示画面。
在本公开一些实施例中，所述原始显示画面为图片或视频等数据。本公 开实施例并不限定所述原始显示画面的种类。
步骤602中，所述原始显示画面的一区域的平均灰阶值大于所述原始显示画面的平均灰阶值，且所述区域的平均灰阶值与所述原始显示画面的平均灰阶值之间的差值大于预设阈值时，将所述区域确定为目标区域。
在本公开实施例中，所述目标区域为在所述原始显示画面中原始亮度大于最大允许亮度的区域。所述最大允许亮度表示显示原始显示画面的装置(例如，AMOLED面板)所能允许显示的最大亮度。例如：将所述最大允许亮度设置为300nit(对应Gray 255)，并在出厂前进行设置。
步骤603中，确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于所述最大允许亮度。
步骤604中，根据亮度和灰阶之间的关系、所述初始亮度以及所述目标亮度，确定所述目标区域的目标灰阶。
在本公开一些实施例中，将所述目标区域的初始亮度和目标亮度代入以下计算公式(1)，确定所述目标区域的目标灰阶；
L＝A*(G/255) 2.2        (1)
其中，L为所述目标区域的目标亮度，G为所述目标区域的目标灰阶，A为目标区域的初始亮度。
在本公开实施例中，所述目标灰阶是指能保证所述目标区域的亮度不超过最大允许亮度的灰阶值。
以图2所示的情景为例，所述目标区域的初始亮度为400nit，最大允许亮度为300nit，将最大允许亮度设置为目标亮度，则将以上参数值代入上述公式，可得
300＝400(G/255) 2.2         (2)
则可以求得G＝223.73≈224(取整)。当出现图2所示的情景时，应该将目标区域的灰阶值从255调整为224，进而将目标区域的亮度调整到300nit。
以图4所示的情景为例，最大允许亮度为65.8nit，确定目标区域的初始亮度为65.8*{0.33*(128/255)}＝87.58nit；将最大允许亮度设置为目标亮度，则将以上参数值代入计算公式(1)可得
65.8＝87.58(G/255) 2.2      (3)
则求得G＝112.39≈112(取整)。当出现图4所示的情景时，将目标区域的灰阶值从128调整为112，进而将目标区域的亮度调整到65.8nit。
步骤605中，将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
一些实施例中，在上述实施例的基础上，所述图像处理方法还包括：
确定原始显示画面的平均灰阶值和目标区域的平均灰阶值。
在本公开一些实施例中，统计原始显示画面的灰阶与亮度的曲线图，进而根据原始显示画面的灰阶与亮度的曲线图，确定原始显示画面的平均灰阶值和目标区域的平均灰阶值。
例如，根据图像的整体灰度值以及DBV设定值，确定亮度和灰阶。
一些实施例中，原始显示画面为视频，计算该视频中每一帧图像的平均灰阶值，视频中所有帧图像的平均灰阶值的平均值作为原始显示画面的平均灰阶值。
例如，图7b为图7a中所示的原始显示画面的灰阶与亮度的曲线图，参见图7b，7a中所示的原始显示画面的平均灰阶值为72。图8b为图8a中所示的原始显示画面的灰阶与亮度的曲线图，参见图8b，8a中所示的原始显示画面的平均灰阶值为217。
在本公开上述实施例中，接收原始显示画面后，若在原始显示画面中存在原始亮度大于最大允许亮度的区域时，将该区域确定为目标区域，进而可根据亮度和灰阶之间的关系、所述目标亮度以及所述初始亮度，求得能使得所述目标区域的亮度不超过所述最大允许亮度的目标灰阶，并将所述目标区域的灰阶值调整为所述目标灰阶，这样将目标区域的亮度调整到最大允许亮度以下，延长了产品的寿命，同时提升了用户体验。
图9为本公开实施例提供的一种图像处理装置的示意图，参见图9，该图像处理装置900包括接收模块901、第一确定模块902、第二确定模块903以及调整模块904。
接收模块901设置为接收原始显示画面。
第一确定模块902设置为确定所述原始显示画面中的目标区域，其中，所述目标区域的原始亮度大于最大允许亮度。
第二确定模块903设置为确定所述目标区域的目标灰阶。
调整模块904设置为将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
一些实施例中，所述第一确定模块902包括第一确定单元。
第一确定单元设置为，在所述原始显示画面的一区域的平均灰阶值大于所述原始显示画面的平均灰阶值，且所述区域的平均灰阶值与所述原始显示画面的平均灰阶值之间的差值大于预设阈值时，将所述区域确定为所述目标区域。
一些实施例中，所述第二确定模块903包括第二确定单元和第三确定单元。
第二确定单元设置为，确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于所述最大允许亮度。
第三确定单元设置为，根据灰阶和亮度之间的关系，所述初始亮度以及所述目标亮度，确定所述目标灰阶。
一些实施例中，所述第三确定单元包括确定子单元。
确定子单元设置为，根据所述目标区域的初始亮度和目标亮度以及计算公式L＝A*(G/255) 2.2，确定所述目标灰阶；
其中，L为所述目标区域的目标亮度，G为所述目标区域的目标灰阶，A为所述目标区域的初始亮度。
本公开实施例中，上述图像处理装置能够实现图1、图6的方法实施例中实现的各个过程，为避免重复，这里不再赘述。
在本公开上述实施例中，接收模块901接收原始显示画面后，若在原始显示画面中存在原始亮度大于最大允许亮度的区域时，通过第一确定模块902将该区域确定为待调整的目标区域，进而通过第二确定模块903求得能使得目标区域的亮度不超过最大允许亮度的目标灰阶，并通过调整模块904将所述目标区域的灰阶值调整为所述目标灰阶，这样将目标区域的亮度调整到最大允许亮度以下，延长了产品的寿命，同时提升了用户体验。
本公开一些实施例提供一种图像处理装置，如图10所示，图像处理装置1000包括存储器1001、处理器1002及存储在所述存储器1001上并可在所述 处理器1002上运行的计算机程序，所述计算机程序被所述处理器执行时实现如上述任一所述的图像处理方法中的步骤。
本公开一些实施例提供了一种显示设备，包括如上所述的图像处理装置。
一些实施例中，所述显示设备为手机、电脑或平板电脑等显示图像或视频等数据的设备。
本公开一些实施例还提供了一种计算机存储介质，计算机存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现上述图像处理方法的步骤。
一些实施例中，所述计算机存储介质为计算机可读存储介质，如只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等。
以上所述是本公开的一些实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰。

Claims (11)

  1. 一种图像处理方法，包括：
    接收原始显示画面；
    确定所述原始显示画面中的目标区域，其中，所述目标区域的原始亮度大于最大允许亮度；
    确定所述目标区域的目标灰阶；以及
    将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
  2. 根据权利要求1所述的图像处理方法，其中，所述确定所述原始显示画面中的目标区域，包括：
    在所述原始显示画面的一区域的平均灰阶值大于所述原始显示画面的平均灰阶值，且所述区域的平均灰阶值与所述原始显示画面的平均灰阶值之间的差值大于预设阈值时，将所述区域确定为所述目标区域。
  3. 根据权利要求1或2所述的图像处理方法，其中，所述确定所述目标区域的目标灰阶，包括：
    确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于所述最大允许亮度；以及
    根据亮度和灰阶之间的关系、所述初始亮度以及所述目标亮度，确定所述目标灰阶。
  4. 根据权利要求3所述的图像处理方法，其中，所述根据灰阶和亮度之间的关系，以及所述初始亮度和所述目标亮度，确定所述目标区域的目标灰阶，包括：
    根据所述初始亮度、所述目标亮度、以及所述灰阶和亮度之间的关系L＝A*(G/255) 2.2，确定所述目标灰阶；
    其中，L为所述目标亮度，G为所述目标灰阶，以及A为所述初始亮度。
  5. 一种图像处理装置，包括：
    接收模块，设置为接收原始显示画面；
    第一确定模块，设置为确定所述原始显示画面中的目标区域，其中，所 述目标区域的原始亮度大于最大允许亮度；
    第二确定模块，设置为确定所述目标区域的目标灰阶；以及
    调整模块，设置为将所述目标区域的灰阶值调整为所述目标灰阶，使得所述目标区域的亮度不超过所述最大允许亮度。
  6. 根据权利要求5所述的图像处理装置，其中，所述第一确定模块包括：
    第一确定单元，设置为在所述原始显示画面的一区域的平均灰阶值大于所述原始显示画面的平均灰阶值，且所述区域的平均灰阶值与所述原始显示画面的平均灰阶值之间的差值大于预设阈值时，将所述区域确定为所述目标区域。
  7. 根据权利要求5或6所述的图像处理装置，其中，所述第二确定模块包括：
    第二确定单元，设置为确定所述目标区域的初始亮度和目标亮度，其中，所述目标亮度不大于所述最大允许亮度；以及
    第三确定单元，设置为根据亮度和灰阶之间的关系、所述初始亮度以及所述目标亮度，确定所述目标灰阶。
  8. 根据权利要求7所述的图像处理装置，其中，所述第三确定单元包括：
    确定子单元，设置为根据所述初始亮度、所述目标亮度以及所述灰阶和亮度之间的关系L＝A*(G/255) 2.2，确定所述目标灰阶；
    其中，L为所述目标亮度，G为所述目标灰阶，以及A为所述初始亮度。
  9. 一种图像处理装置，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至4任一项所述的图像处理方法中的步骤。
  10. 一种显示设备，包括如权利要求5至9中任一项所述的图像处理装置。
  11. 一种计算机存储介质，存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至4任一项所述的图像处理方法中的步骤。
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