WO2020048496A1 - 调节白平衡的方法、系统及显示器 - Google Patents

调节白平衡的方法、系统及显示器 Download PDF

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WO2020048496A1
WO2020048496A1 PCT/CN2019/104454 CN2019104454W WO2020048496A1 WO 2020048496 A1 WO2020048496 A1 WO 2020048496A1 CN 2019104454 W CN2019104454 W CN 2019104454W WO 2020048496 A1 WO2020048496 A1 WO 2020048496A1
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color temperature
temperature value
blocks
white balance
white
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PCT/CN2019/104454
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English (en)
French (fr)
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武勇
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晶晨半导体(上海)股份有限公司
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Priority to EP19857256.2A priority Critical patent/EP3849179B1/en
Priority to US17/266,945 priority patent/US11457188B2/en
Publication of WO2020048496A1 publication Critical patent/WO2020048496A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/026—Control of mixing and/or overlay of colours in general
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/80—Camera processing pipelines; Components thereof
    • H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
    • H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20021—Dividing image into blocks, subimages or windows
    • 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
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • 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
    • G09G2320/08—Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
    • 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
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • G09G2320/103—Detection of image changes, e.g. determination of an index representative of the image change
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation

Definitions

  • the present invention relates to the field of display technology, and in particular, to a method, a system, and a display for adjusting white balance.
  • White balance is to restore the color of the object under different light source conditions to the natural color of the object, that is, to normalize the image under different color temperature conditions so that "white becomes white", and the white balance parameters are at different color temperatures.
  • the parameters are different.
  • the white balance parameters of the current TV are fixed.
  • ColorTemperature is a performance index of televisions.
  • the so-called color temperature is a performance index of televisions.
  • a set of spectra is generated.
  • a pure black body needs to reach a certain temperature to produce the same spectrum.
  • This temperature is the color temperature of the light source.
  • TVs on the market must have a color temperature adjustment function. Through this function (usually there are three choices of 9300K, 6500K, 5000K), the color of the display can meet the high standard work requirements.
  • Color temperature is a unit of measure that expresses the color components contained in light. Theoretically, the color temperature refers to the color that the absolute black body appears after it is heated from absolute zero (-273 ° C). After being heated, the black body gradually changes from black to red, turns yellow, turns white, and finally emits blue light. When heated to a certain temperature, the spectral content of the light emitted by the black body is called the color temperature at this temperature.
  • the unit of measurement is "K" (Kelvin). If the light emitted by a light source is at a certain temperature, The light emitted by the black body contains the same spectral components, which is called a certain K color temperature.
  • the purpose of the two in the use of camera equipment is different, and the feeling of shooting is different. Coupled with post-production and debugging, and the director's intentions are different, so different movies and TV shows use different color temperatures, but the current color temperature must be manually adjusted on the TV menu, so the actual TV and TV color temperatures appear 3. The white balance parameters do not match, the picture is unreal, and the effect is poor.
  • a method for adjusting white balance, applied to a display including the following steps:
  • the image information for identifying the currently played frame image to be adjusted includes:
  • the target number of color blocks with the largest color temperature value of the color blocks in the preset number of image blocks is obtained.
  • the obtaining the target number of white blocks with the largest color temperature value among the preset number of image blocks includes:
  • the number of white blocks corresponding to each color temperature value in a preset number of image blocks is counted to obtain the target number of white blocks with the largest color temperature value.
  • the generating a white balance color temperature three-dimensional curve according to the white balance parameters of the display under at least three color temperature values includes:
  • the obtaining a matched target color temperature value according to the image information includes:
  • the target number of the white blocks is compared with the target number of the color blocks, and a color temperature value corresponding to an image block with a large number of targets is obtained, that is, a target color temperature value.
  • the invention also provides a system for adjusting white balance, which is applied to a display and includes:
  • An identification unit configured to identify image information of a currently-played frame image to be adjusted
  • An obtaining unit configured to obtain a matched target color temperature value according to the image information
  • An adjusting unit is configured to adjust a white balance parameter of the frame image to be adjusted according to the target color temperature value.
  • the identification unit includes:
  • a segmentation module configured to divide a currently played frame image to be adjusted into a preset number of image blocks
  • a first acquisition module configured to acquire the target number of white blocks with the largest color temperature value among the preset number of image blocks
  • the second obtaining module is configured to obtain, according to the number of color blocks corresponding to each preset color temperature value, the target number of color blocks with the largest color temperature value of the color blocks in the preset number of image blocks.
  • the first obtaining module is configured to generate a white balance color temperature three-dimensional curve according to white balance parameters of the display under at least three color temperature values;
  • the first obtaining module is further configured to calculate a component average value of each white block in the RGB channel, and obtain a color temperature value of each white block according to the component average value of the white block in the RGB channel and the three-dimensional curve of the white balance color temperature;
  • the first acquisition module is further configured to count the number of white blocks corresponding to each color temperature value in a preset number of image blocks according to the color temperature values corresponding to each white block to obtain the target number of white blocks with the largest color temperature value. number.
  • the obtaining unit is configured to compare the number of targets of the white block with the number of targets of the color block, and obtain a color temperature value corresponding to an image block with a large number of targets, that is, a target color temperature value.
  • the present invention also provides a display including the system for adjusting white balance as described above.
  • the white balance parameter of the frame image to be adjusted is automatically adjusted according to the target color temperature value, so that the real-time
  • the purpose of adjusting the white balance parameters corresponding to the content of the played frame image is to make the image feel more realistic and improve the visual effect.
  • FIG. 2 is a block diagram of an embodiment of a system for adjusting white balance according to the present invention.
  • a method for adjusting white balance, applied to a display includes the following steps:
  • the method for adjusting white balance can be applied to a display or a television.
  • the image information of the frame image to be adjusted is identified and the matching target color temperature value is obtained according to the image information, so that the white balance parameter of the frame image to be adjusted is automatically adjusted according to the target color temperature value, so that real-time
  • the purpose of adjusting the white balance parameters of the currently played frame image content is to make the image feel more realistic and improve the visual effect.
  • the step S1 of identifying the image information of the currently played frame image to be adjusted includes:
  • a local dimming technique can be used to segment the frame image to be adjusted.
  • the step S12 to obtain the target number of white blocks with the largest color temperature value among the preset number of image blocks includes:
  • each television has its own white balance parameters.
  • the white balance parameters commonly used by TVs on the market are: R (RED, red ) gain (gain), G (GREEN, green) gain, B (BLUE, blue) gain, R offset (compensation), G offset and B offset. Because offset has a small effect on the white picture, you can use gain to set the offset to the default value, and G has a large effect on brightness. Therefore, the white balance parameters are mainly adjusted through R and B.
  • S122 Calculate the component mean value of each white block in the RGB channel, and obtain the color temperature value of each white block according to the component mean value of the white block in the RGB channel and the three-dimensional curve of the white balance color temperature;
  • the frame image to be adjusted is divided into M ⁇ N blocks (M and N are positive integers) as an example for description:
  • the color temperature value of each valid white block is obtained according to the three-dimensional graph of the white balance color temperature, and the color temperature value of the white block with the largest proportion of color temperature is obtained through statistics, then the current color temperature value is the color temperature value of the white block.
  • the preset color temperature value includes at least three types
  • the preset color temperature value may include 6500K, 9300K, and 12000K.
  • the number of white blocks is obtained, and the rest are colored blocks (ie, color regions) with color information.
  • the color region can be used to calculate the proportion of three colors of R, G, and B. It is divided into 6 blocks.
  • the colors RED, GREEN, BLUE, CYAN (cyan), MAGENTA (magenta), YELLOW (yellow), the total tone direction of the color part is obtained by counting the proportion of the six primary colors.
  • the step S2 obtaining a matched target color temperature value according to the image information includes:
  • the target number of the white blocks is compared with the target number of the color blocks, and a color temperature value corresponding to an image block with a large number of targets is obtained, that is, a target color temperature value.
  • the target number of white blocks is compared with the target number of color blocks, a target number with a large value is selected, and a color temperature value of an image block corresponding to the target number with a large value is used as a target color temperature value, so that
  • the target white temperature parameter condition of the white balance parameter of the display achieves the purpose of automatically adjusting the white balance parameter of the image during playback, making the image feel more realistic, improving the user's visual effect, and restoring the original scene effect of the image.
  • the present invention also provides a system for adjusting white balance, which is applied to a display and may include: a recognition unit 1, an acquisition unit 2 and an adjustment unit 3;
  • An identification unit 1 for identifying image information of a frame image to be adjusted currently being played
  • An adjusting unit 3 is configured to adjust a white balance parameter of the frame image to be adjusted according to the target color temperature value.
  • the system for adjusting white balance can be applied to adjust the white balance parameters of an image in real time when the television broadcasts a program in a television, and can also be used to adjust the white balance parameters of an image according to the displayed image content on a monitor.
  • the image information of the frame image to be adjusted is identified and the matching target color temperature value is obtained according to the image information, so that the white balance parameter of the frame image to be adjusted is automatically adjusted according to the target color temperature value, so that The purpose of adjusting the white balance parameters of the currently played frame image content is to make the image feel more realistic and improve the visual effect.
  • the identification unit 1 may include:
  • a segmentation module configured to divide a currently played frame image to be adjusted into a preset number of image blocks
  • a first acquisition module configured to acquire the target number of white blocks with the largest color temperature value among the preset number of image blocks
  • the second obtaining module is configured to obtain, according to the number of color blocks corresponding to each preset color temperature value, the target number of color blocks with the largest color temperature value of the color blocks in the preset number of image blocks.
  • the first obtaining module is configured to generate a white balance color temperature three-dimensional curve according to white balance parameters of the display under at least three color temperature values;
  • the first obtaining module is further configured to calculate a component average value of each white block in the RGB channel, and obtain a color temperature value of each white block according to the component average value of the white block in the RGB channel and the three-dimensional curve of the white balance color temperature;
  • the first acquisition module is further configured to count the number of white blocks corresponding to each color temperature value in a preset number of image blocks according to the color temperature values corresponding to each white block to obtain the target number of white blocks with the largest color temperature value. number.
  • the obtaining unit 2 is configured to compare the target number of the white blocks with the target number of the color blocks, and obtain a color temperature value corresponding to an image block with a large number of targets, that is, a target color temperature value.
  • the present invention also provides a display including the system for adjusting white balance as described above.

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Abstract

本发明公开了调节白平衡的方法、系统及显示器，属于显示技术领域。调节白平衡的方法，应用于显示器中，包括的步骤有：识别当前播放的待调节帧图像的图像信息；根据所述图像信息获取匹配的目标色温值；根据所述目标色温值调节所述待调节帧图像的白平衡参数。本发明通过识别当前播放的待调节帧图像的图像信息，依据该图像信息获取匹配的目标色温值，从而自动根据目标色温值调节待调节帧图像的白平衡参数，实现可实时根据当前播放的帧图像内容对白平衡参数进行相应调整的目的，从而时图像的画面感更加真实，提升视觉效果。

Description

调节白平衡的方法、系统及显示器 技术领域
本发明涉及显示技术领域，尤其涉及一种调节白平衡的方法、系统及显示器。
背景技术
白平衡就是让物体在不同光源条件下所呈现出来的颜色，恢复到物体的固有色，即在不同色温条件下将图像做归一化使得“白色成为白色”，白平衡参数在不同的色温下参数是不同的。目前电视的白平衡参数是固定不变的。
所谓色温(ColorTemperature)是电视机一个性能指标。光源发光时会产生一组光谱，用一个纯黑体产生出同样的光谱时所需要达到的某一温度，这个温度就是该光源的色温。市面上几乎所有的电视肯定带有色温调节功能，通过该功能(一般有9300K、6500K、5000K三个选择)可以使显示器的色彩能够满足高标准工作要求。
色温是表示光线中包含颜色成分的一个计量单位。从理论上讲，色温是指绝对黑体从绝对零度(一273℃)开始加温后所呈现的颜色。黑体在受热后.逐渐由黑变红，转黄，发白，最后发出蓝色光。当加热到一定的温度.黑体发出的光所含的光谱成分.就称为这一温度下的色温，计量单位为“K”(开尔文)、如果某一光源发出的光，与某一温度下黑体发出的光所含的光谱成分相同.即称为某K色温.
当前电视剧一般用高清摄像机拍摄，记录在磁带上。而电影就比较多了， 传统的有使用胶片的(35mm居多，70mm巨幕电影(Image Maximum，简称IMAX)国外纪录片较多，16mm较少)，或者新一些的用阿莱艾丽莎摄影机，同时也有用索尼松下的高清摄像机的，这些有的记录在胶片上，有的是数字格式的硬盘或磁带存储。电视剧后期调色份量比较小，所以电视剧的前期拍摄稍微偏向于叙事，影像要求可能不会非常高。而电影拍摄着力于保留更多的画面明暗信息，以为后期制作加大空间，所以，在摄像设备的使用上两者的目的不尽相同，拍出来的感觉也就不太一样。再加上后期制作和调试，以及导演的意图不一样，所以不同的电影电视剧使用不同的色温，但是当前色温都必须在电视机菜单上手动调整，因此，出现了电影电视剧实际色温和电视机色温、白平衡参数不匹配，画面不真实、效果差的问题。
发明内容
针对上述问题，现提供一种旨在实现可根据图像的信息自动识别匹配的色温以调节白平衡参数的调节白平衡的方法、系统及显示器。
一种调节白平衡的方法，应用于显示器中，包括下述步骤：
识别当前播放的待调节帧图像的图像信息；
根据所述图像信息获取匹配的目标色温值；
根据所述目标色温值调节所述待调节帧图像的白平衡参数。
优选的，所述识别当前播放的待调节帧图像的图像信息，包括：
将当前播放的待调节帧图像分割为预设数目个图像块；
获取预设数目个图像块中色温值占比最多的白色块目标个数；
根据每一预设色温值对应的彩色块个数，获取在预设数目个图像块中彩色块的色温值占比最多的彩色块目标个数。
优选的，所述获取预设数目个图像块中色温值占比最多的白色块目标个数，包括：
根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线；
计算每一白色块在RGB通道的分量均值，根据白色块在RGB通道的分量均值及所述白平衡色温三维曲线获取每一白色块的色温值；
根据每一白色块对应的色温值，统计预设数目个图像块中每一色温值对应的白色块个数，以获取色温值占比最多的白色块目标个数。
优选的，所述根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线，包括：
获取所述显示器在每一色温值下的红色增益和蓝色增益；
依据每一色温值对应的红色增益、蓝色增益，采用插值法生成白平衡色温三维曲线。
优选的，所述根据所述图像信息获取匹配的目标色温值，包括：
比较所述白色块目标个数与所述彩色块目标个数，获取目标个数多的图像块对应的色温值，即目标色温值。
本发明还提供了一种调节白平衡的系统，应用于显示器中，包括：
识别单元，用于识别当前播放的待调节帧图像的图像信息；
获取单元，用于根据所述图像信息获取匹配的目标色温值；
调节单元，用于根据所述目标色温值调节所述待调节帧图像的白平衡参数。
优选的，所述识别单元包括：
分割模块，用于将当前播放的待调节帧图像分割为预设数目个图像块；
第一获取模块，用于获取预设数目个图像块中色温值占比最多的白色块目标个数；
第二获取模块，用于根据每一预设色温值对应的彩色块个数，获取在预设数目个图像块中彩色块的色温值占比最多的彩色块目标个数。
优选的，所述第一获取模块用于根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线；
所述第一获取模块还用于计算每一白色块在RGB通道的分量均值，根据白色块在RGB通道的分量均值及所述白平衡色温三维曲线获取每一白色块的色温值；
所述第一获取模块还用于根据每一白色块对应的色温值，统计预设数目个图像块中每一色温值对应的白色块个数，以获取色温值占比最多的白色块目标个数。
优选的，所述获取单元用于比较所述白色块目标个数与所述彩色块目标个数，获取目标个数多的图像块对应的色温值，即目标色温值。
本发明还提供了一种显示器，包括如上述的调节白平衡的系统。
上述技术方案的有益效果：
本技术方案中，通过识别当前播放的待调节帧图像的图像信息，依据该图像信息获取匹配的目标色温值，从而自动根据目标色温值调节待调节帧图像的白平衡参数，实现可实时根据当前播放的帧图像内容对白平衡参数进行相应调整的目的，从而时图像的画面感更加真实，提升视觉效果。
附图说明
图1为本发明所述的调节白平衡的方法的流程图；
图2为本发明所述的调节白平衡的系统的一种实施例的模块图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，在不冲突的情况下，本发明中的实施例及实施例中的特征可以相互组合。
下面结合附图和具体实施例对本发明作进一步说明，但不作为本发明的限定。
如图1所示，一种调节白平衡的方法，应用于显示器中，包括下述步骤：
S1.识别当前播放的待调节帧图像的图像信息；
S2.根据所述图像信息获取匹配的目标色温值；
S3.根据所述目标色温值调节所述待调节帧图像的白平衡参数。
需要说明的是：该调节白平衡的方法可应用于显示器中，也可以应用于电视中。
在本实施例中，通过识别当前播放的待调节帧图像的图像信息，依据该图像信息获取匹配的目标色温值，从而自动根据目标色温值调节待调节帧图像的白平衡参数，实现可实时根据当前播放的帧图像内容对白平衡参数进行相应调整的目的，从而时图像的画面感更加真实，提升视觉效果。
在优选的实施例中，所述步骤S1识别当前播放的待调节帧图像的图像信息，包括：
S11.将当前播放的待调节帧图像分割为预设数目个图像块，以便于获取每一块图像的色温值。S12.获取预设数目个图像块中色温值占比最多的白色块目标个数；
作为举例而非限定，可采用local dimming(区域点亮)技术对待调节帧图像进行分割。
在优选的实施例中，所述步骤S12获取预设数目个图像块中色温值占比最多的白色块目标个数，包括：
S121.根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线，包括：
S1211.获取所述显示器在每一色温值下的红色增益和蓝色增益；
S1212.依据每一色温值对应的红色增益、蓝色增益，采用插值法生成白平衡色温三维曲线。
在本实施例中，考虑到电视使用的屏有大小分辨率和亮度色度等差异，每一台电视都有自己的白平衡参数，市面上电视常用的白平衡参数有：R(RED，红色)gain(增益)、G(GREEN，绿色)gain、B(BLUE，蓝色)gain、R offset(补偿)、G offset和B offset。由于offset对于白画面影响较小，可使用gain，将offset设置默认值，G对亮度影响较大，因此白平衡参数主要通过R、B做调整。
作为举例而非限定，获取电视分别在6500/7500/8500/9300/1000/11000/12000七个色温下的白平衡参数R gain、B gain的值，得到7组矫正参数(即：R gain、B gain)，7组矫正参数通过插值方法获得白平衡色温三维曲线，该白平衡色温三维曲线由R gain、B gain和色温组成。
S122.计算每一白色块在RGB通道的分量均值，根据白色块在RGB通道的分量均值及所述白平衡色温三维曲线获取每一白色块的色温值；
S123.根据每一白色块对应的色温值，统计预设数目个图像块中每一色温值对应的白色块个数，以获取色温值占比最多的白色块目标个数。
需要说明的是：上述步骤所述白色块均为有效的白色块。
在本实施例中，以待调节帧图像分割为M×N块(M、N均为正整数)为例进行说明：
首先，统计M×N块中白色块的数量及相应的RGB通道的分量的均值；
其次，根据R gain和B gain得到有效的白色块(灰度块为无效的白色块)；
然后，根据白平衡色温三维曲线图得到每一个有效的白色块的色温值，通过统计获取色温占比最多的白色块色温值，那么当前色温值就是白色块的色温值。
例如：25×25＝625块中有效的白色块为100块，其中，80个白色块对应的色温值为9300K，即色温值占比最多的白色块对应的色温值为9300K。
S13.根据每一预设色温值对应的彩色块个数，获取在预设数目个图像块中彩色块的色温值占比最多的彩色块目标个数。
进一步地，所述预设色温值至少包括三类；
当所述预设色温值包括三类时，所述预设色温值可包括6500K，9300K和12000K。
在本实施例中，获取了白色块数量，剩下的是带有颜色信息的彩色块(即颜色区域)，颜色区域可以统计出R、G、B三个颜色的占比，分成6块主要颜色RED，GREEN，BLUE，CYAN(青色)，MAGENTA(品红色)，YELLOW(黄色)，通过统计六个基色占比获取颜色部分整体色调方向。RED和 YELLOW取向暖色(6500K)，BLUE和CYAN取向冷色(12000K)，MAGENTA和GREEN取向9300色温。将每一彩色块与三个色温值进行匹配，获取彩色块占比最多的色温值，并统计该色温值对应的彩色块个数(即：彩色块目标个数)。
在优选的实施例中，所述步骤S2根据所述图像信息获取匹配的目标色温值，包括：
比较所述白色块目标个数与所述彩色块目标个数，获取目标个数多的图像块对应的色温值，即目标色温值。
在本实施例中，将白色块目标个数与彩色块目标个数比较大小，选取数值大的目标个数，将数值大的目标个数对应的图像块的色温值作为目标色温值，以便根据该目标色温值条件显示器的白平衡参数，实现在播放过程中自动调节图像白平衡参数的目的，使图像的画面感更加真实，提升用户的视觉效果，还原图像最原始的场景效果。
如图2所示，本发明还提供了一种调节白平衡的系统，应用于显示器中，可包括：识别单元1、获取单元2和调节单元3；
识别单元1，用于识别当前播放的待调节帧图像的图像信息；
获取单元2，用于根据所述图像信息获取匹配的目标色温值；
调节单元3，用于根据所述目标色温值调节所述待调节帧图像的白平衡参数。
需要说明的是：该调节白平衡的系统可应用于电视中在电视播放节目时，实时调节图像的白平衡参数，还可应用于显示器中根据显示的图像内容调节图像的白平衡参数。
在本实施例中，通过识别当前播放的待调节帧图像的图像信息，依据该 图像信息获取匹配的目标色温值，从而自动根据目标色温值调节待调节帧图像的白平衡参数，实现可实时根据当前播放的帧图像内容对白平衡参数进行相应调整的目的，从而时图像的画面感更加真实，提升视觉效果。
在优选的实施例中，所述识别单元1可包括：
分割模块，用于将当前播放的待调节帧图像分割为预设数目个图像块；
第一获取模块，用于获取预设数目个图像块中色温值占比最多的白色块目标个数；
第二获取模块，用于根据每一预设色温值对应的彩色块个数，获取在预设数目个图像块中彩色块的色温值占比最多的彩色块目标个数。
进一步地，所述第一获取模块用于根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线；
所述第一获取模块还用于计算每一白色块在RGB通道的分量均值，根据白色块在RGB通道的分量均值及所述白平衡色温三维曲线获取每一白色块的色温值；
所述第一获取模块还用于根据每一白色块对应的色温值，统计预设数目个图像块中每一色温值对应的白色块个数，以获取色温值占比最多的白色块目标个数。
在优选的实施例中，所述获取单元2用于比较所述白色块目标个数与所述彩色块目标个数，获取目标个数多的图像块对应的色温值，即目标色温值。
本发明还提供了一种显示器，包括如上述的调节白平衡的系统。
以上所述仅为本发明较佳的实施例，并非因此限制本发明的实施方式及保护范围，对于本领域技术人员而言，应当能够意识到凡运用本发明说明书及图示内容所作出的等同替换和显而易见的变化所得到的方案，均应当包含 在本发明的保护范围内。

Claims (10)

  1. 一种调节白平衡的方法，应用于显示器中，其特征在于，包括下述步骤：
    识别当前播放的待调节帧图像的图像信息；
    根据所述图像信息获取匹配的目标色温值；
    根据所述目标色温值调节所述待调节帧图像的白平衡参数。
  2. 根据权利要求1所述的调节白平衡的方法，其特征在于，所述识别当前播放的待调节帧图像的图像信息，包括：
    将当前播放的待调节帧图像分割为预设数目个图像块；
    获取预设数目个图像块中色温值占比最多的白色块目标个数；
    根据每一预设色温值对应的彩色块个数，获取在预设数目个图像块中彩色块的色温值占比最多的彩色块目标个数。
  3. 根据权利要求2所述的调节白平衡的方法，其特征在于，所述获取预设数目个图像块中色温值占比最多的白色块目标个数，包括：
    根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线；
    计算每一白色块在RGB通道的分量均值，根据白色块在RGB通道的分量均值及所述白平衡色温三维曲线获取每一白色块的色温值；
    根据每一白色块对应的色温值，统计预设数目个图像块中每一色温值对应的白色块个数，以获取色温值占比最多的白色块目标个数。
  4. 根据权利要求3所述的调节白平衡的方法，其特征在于，所述根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线，包括：
    获取所述显示器在每一色温值下的红色增益和蓝色增益；
    依据每一色温值对应的红色增益、蓝色增益，采用插值法生成白平衡色温 三维曲线。
  5. 根据权利要求2所述的调节白平衡的方法，其特征在于，所述根据所述图像信息获取匹配的目标色温值，包括：
    比较所述白色块目标个数与所述彩色块目标个数，获取目标个数多的图像块对应的色温值，即目标色温值。
  6. 一种调节白平衡的系统，应用于显示器中，其特征在于，包括：
    识别单元，用于识别当前播放的待调节帧图像的图像信息；
    获取单元，用于根据所述图像信息获取匹配的目标色温值；
    调节单元，用于根据所述目标色温值调节所述待调节帧图像的白平衡参数。
  7. 根据权利要求6所述的调节白平衡的系统，其特征在于，所述识别单元包括：
    分割模块，用于将当前播放的待调节帧图像分割为预设数目个图像块；
    第一获取模块，用于获取预设数目个图像块中色温值占比最多的白色块目标个数；
    第二获取模块，用于根据每一预设色温值对应的彩色块个数，获取在预设数目个图像块中彩色块的色温值占比最多的彩色块目标个数。
  8. 根据权利要求7所述的调节白平衡的系统，其特征在于，所述第一获取模块用于根据所述显示器在至少三个色温值下的白平衡参数生成白平衡色温三维曲线；
    所述第一获取模块还用于计算每一白色块在RGB通道的分量均值，根据白色块在RGB通道的分量均值及所述白平衡色温三维曲线获取每一白色块的色温值；
    所述第一获取模块还用于根据每一白色块对应的色温值，统计预设数目个图像块中每一色温值对应的白色块个数，以获取色温值占比最多的白色块目标个数。
  9. 根据权利要求7所述的调节白平衡的系统，其特征在于，所述获取单元用于比较所述白色块目标个数与所述彩色块目标个数，获取目标个数多的图像块对应的色温值，即目标色温值。
  10. 一种显示器，其特征在于，包括如权利要求6-9所述的调节白平衡的系统。
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