WO2016045146A1 - 用于显示器的图像色彩增强方法及装置 - Google Patents

用于显示器的图像色彩增强方法及装置 Download PDF

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WO2016045146A1
WO2016045146A1 PCT/CN2014/088151 CN2014088151W WO2016045146A1 WO 2016045146 A1 WO2016045146 A1 WO 2016045146A1 CN 2014088151 W CN2014088151 W CN 2014088151W WO 2016045146 A1 WO2016045146 A1 WO 2016045146A1
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saturation
gain
rgb
image color
color enhancement
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French (fr)
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吴金军
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深圳市华星光电技术有限公司
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/2003Display of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02Control 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0242Compensation of deficiencies in the appearance of colours
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0666Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00Aspects of display data processing
    • G09G2340/06Colour space transformation

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  • the present invention relates to the field of image processing technologies, and in particular, to an image color enhancement method and apparatus for a display.
  • Liquid crystal displays have the advantages of thin body, low power consumption, no radiation, etc., and are widely used, such as mobile phones, digital cameras, computers, television screens, and the like.
  • Most of the liquid crystal displays on the existing market are backlight type liquid crystal displays, including a liquid crystal panel and a backlight module.
  • the liquid crystal panel and the backlight module are oppositely disposed, and the backlight module provides a display light source to the liquid crystal panel to enable the liquid crystal panel to display images.
  • the image is usually processed by color enhancement method to improve the visual display effect of the image.
  • the first type of enhancement method is to perform the same scaling and translation of the RGB three color components of the image without color space conversion, so as to achieve the same color tone.
  • the second type of enhancement method is to perform color space conversion on color components, and convert from RGB space to other color spaces, such as HSV space or HSL space, and then perform corresponding enhancement processing, and then switch back to RGB space.
  • the second type of enhancement method can achieve better color enhancement than the first type of method.
  • the color tone is usually changed, which may result in color shift; or when the image with higher saturation is processed, supersaturation occurs. , causing image distortion.
  • the present invention provides an image color enhancement method and apparatus for a display, in which only the saturation of the image is enhanced, and the color shift problem does not occur after the enhancement; in the method, different saturation The degree has different increments after the enhancement operation, which ensures that the problem of supersaturation does not occur when the original saturation is high.
  • An image color enhancement method for a display comprising the steps of:
  • S101 Collect, for all RGB combinations in the image displayed by the display, a tristimulus value of a CIE1931 color space, and calculate a corresponding chrominance value and a brightness value;
  • the value of the gain function ranges from 0 to 1.
  • the gain amount ⁇ S of the saturation first increases and then decreases.
  • the gain function is a sine function and the formula is
  • Another aspect of the present invention is to provide an image color enhancement device for a display, comprising:
  • a data acquisition module configured to collect a tristimulus value of a CIE1931 color space of an image displayed by the display, calculate a corresponding chroma value and a brightness value, and draw an RGB triangle of the color gamut of the display according to the chroma value;
  • An initial saturation calculation module configured to calculate a relative saturation of any chromaticity point D1 as S 1 ;
  • a gain function generating module for providing a gain function
  • a saturation enhancement module performing a gain operation on the relative saturation S 1 by using the gain function, and outputting a gain saturation S 2 ;
  • the data production module calculates the RGB data after the saturation is increased according to the gain saturation S 2 .
  • the process of obtaining the relative saturation S 1 by the initial saturation calculation module includes:
  • the process of calculating the RGB data after the saturation is calculated by the data production module includes:
  • the RGB data corresponding to the chromaticity point D 2 is calculated, and the RGB data after the saturation is obtained is obtained.
  • the value of the gain function ranges from 0 to 1.
  • the gain amount ⁇ S of the saturation first increases and then decreases.
  • the gain function is a sine function and the formula is
  • the image color enhancement method and apparatus for a display provided by the embodiments of the present invention only perform an enhancement operation on the saturation of the image, and the color shift problem does not occur after the enhancement; and for different saturations, the enhancement operation has different Incremental, it can guarantee that there will be no oversaturation when the original saturation is high.
  • FIG. 1 is a flow chart of steps of an image color enhancement method according to an embodiment of the present invention.
  • FIG. 2 is a diagram of an RGB triangle provided by an embodiment of the present invention.
  • FIG. 3 is a structural block diagram of an image color enhancement apparatus according to an embodiment of the present invention.
  • the embodiment provides an image color enhancement method for a display, which is mainly used for color enhancement of an image of a liquid crystal display (LCD).
  • the flow chart shown in FIG. 1 includes the steps of:
  • Step S101 Collect, for all RGB combinations in the image displayed by the display, the tristimulus values X, Y, and Z of the CIE1931 color space, and calculate corresponding chrominance values x, y, and luminance values Y.
  • All RGB combinations refer to all combinations of R, G, and B, respectively, ranging from 0 to 255 gray levels.
  • Step S102 Acquire an RGB triangle of a color gamut range of the display according to the calculated chromaticity value.
  • the RGB triangle of the liquid crystal display obtained in this embodiment is as shown in FIG. 2, that is, the chromaticity diagram of the liquid crystal display is obtained.
  • Step S104 performing a gain operation on the relative saturation S 1 by using a gain function to obtain a gain saturation S 2 .
  • Step S106 Calculate RGB data corresponding to the chromaticity point D 2 to obtain RGB data with increased saturation.
  • step S101 the tristimulus values X, Y, and Z of the image may be measured by using a color analyzer.
  • step S103 referring to FIG. 2, the step first defines relative saturation. That is, the maximum saturation that can be displayed by the display under a certain hue is defined as 1 and the minimum value is 0. Therefore, when the saturation is enhanced, as long as the saturation value is in the range of 0 to 1, it is possible to avoid the case where the saturation is increased beyond the saturation range that the display can achieve. Therefore, the value range of the gain function can be selected to be 0 to 1, and the value of the saturation obtained after the gain calculation is still in the range of 0 to 1.
  • the gain amount ⁇ S of the saturation is first increased and then decreased in the range in which the relative saturation S 1 is increased from 0 to 1.
  • the gain function selected in this embodiment is a sine function, and the formula is In the above formula:
  • the sine function is used to perform the gain operation on the saturation.
  • the sinusoidal function increases nonlinearly, the gain amount ⁇ S ⁇ 0, and ⁇ S increases first and then decreases, that is, When the relative saturation is weak (the part close to 0) or strong (the part close to 1), the gain is calculated after the gain is saturated, which ensures the smooth transition of the gain saturation S 2 and no oversaturation. To avoid image distortion problems.
  • the embodiment provides an image color enhancement device for a display, as shown in the structural block diagram of FIG. 3, the device mainly includes: a data acquisition module 10, an initial saturation calculation module 20, and a gain function.
  • the generating module 30, the saturation enhancement module 40, and the data production module 50 are generated.
  • the apparatus is mainly used to perform various steps of the image color enhancement method as provided in Embodiment 1, in which:
  • the data acquisition module 10 is mainly used to collect the tristimulus values X, Y, Z of the CIE1931 color space for all RGB combinations in the image displayed by the display, and calculate corresponding chrominance values x, y and brightness values Y. All RGB combinations refer to all combinations of R, G, and B, respectively, ranging from 0 to 255 gray levels.
  • the module also plots the RGB triangles of the color gamut range of the display based on the calculated chrominance values x, y, and inputs the RGB triangles into the initial saturation calculation module 20 and the data production module 50.
  • the RGB triangle of the liquid crystal display obtained in this embodiment is as shown in FIG. 2, that is, the chromaticity diagram of the liquid crystal display is obtained.
  • the initial saturation calculation module 20 is configured to calculate the relative saturation of the arbitrary chromaticity point D1 as S 1 .
  • the initial saturation calculation module 20 inputs the calculated relative saturation as S 1 into the saturation enhancement module 40.
  • the gain function generation module 30 is configured to provide a gain function that is input to the saturation enhancement module 40.
  • the provided gain function is a sinusoidal function, and the formula is Thereby further reducing the relative saturation S 1 within the range from 0 to 1, the saturation amount of gain to increase ⁇ S.
  • the saturation enhancement module 40 is configured to perform a gain operation to obtain a gain saturation S 2 based on the relative saturation received from the initial saturation calculation module 20 as S 1 and the gain function received from the gain function generation module 30.
  • the image color enhancement method and apparatus for a display provided by the embodiments of the present invention only perform an enhancement operation on the saturation of the image, and the color shift problem does not occur after the enhancement; And degrees, with different increments after the enhancement operation, can ensure that the problem of supersaturation does not occur when the original saturation is high.

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Abstract

一种用于显示器的图像色彩增强方法,包括步骤:S101、针对显示器显示的图像,采集CIE1931色彩空间的三色刺激值,计算色度值和亮度值;S102、根据色度值获取显示器的色域范围的RGB三角形;S103、对于任意一组RGB数据在RGB三角形中的色度点D 1,定义其相对饱和度为(I);S104、对S 1进行增益运算得到增益饱和度S 2;S105、根据公式OD 2=OD*S 2获取S 2在RGB三角形中对应的色度点D 2,并且色度点D 2位于直线OD上;S106、计算色度点D 2对应的RGB数据,得到增大饱和度后的RGB数据;以及一种用于显示器的图像色彩增强装置,用于执行上述的图像色彩增强方法。

Description

用于显示器的图像色彩增强方法及装置 技术领域
本发明涉及图像处理技术领域,尤其是一种用于显示器的图像色彩增强方法及装置。
背景技术
液晶显示器(LCD)具有机身薄、功耗低、无辐射等优点,得到了广泛的应用,例如移动电话、数字相机、计算机、电视机屏幕等等。现有市场上的液晶显示器大部分为背光型液晶显示器,包括液晶面板及背光模组,液晶面板与背光模组相对设置,背光模组提供显示光源给液晶面板,以使液晶面板显示影像。随着社会的发展,用户对液晶显示器显示画面的质量要求越来越高,为了提高画面的色彩饱和度,通常使用色彩增强方法对图像进行处理,以提高图像的显示视觉效果。
目前常见的图像色彩增强方法主要有两类:第一类增强方法是不进行颜色空间转换,直接对图像的RGB三个颜色分量进行相同的放缩和平移,从而达到色调不变的目的。第二类增强方法是对色彩分量进行颜色空间转换,从RGB空间转换到其他颜色空间,例如HSV空间或HSL空间,做相应的增强运算处理后,再转回RGB空间。第二类增强方法相较于第一类方法可以取得更好的色彩增强效果。但是目前已有的第二类增强方法中,在增大饱和度的同时,通常会改变色调,因此会导致色偏;或者是在对饱和度较高的图片进行处理时,会出现过饱和现象,导致图像失真。
发明内容
有鉴于此,本发明提供了一种用于显示器的图像色彩增强方法及装置,该方法中,仅对图像的饱和度进行增强运算,增强后不会出现色偏问题;该方法中,不同饱和度在进行增强运算后具有不同的增量,可以保证在原始饱和度较高时不会出现过饱和的问题。
为了实现上述的发明目的,本发明采用了如下的技术方案:
一种用于显示器的图像色彩增强方法,包括步骤:
S101、针对显示器显示的图像中的所有RGB组合,采集CIE1931色彩空间的三色刺激值,并计算相应的色度值和亮度值;
S102、根据计算得到的色度值获取所述显示器的色域范围的RGB三角形;
S103、对于任意一组RGB数据在所述RGB三角形中对应的色度点D1,定义其相对饱和度为
Figure PCTCN2014088151-appb-000001
其中,O为RGB=(255,255,255)对应的色度点,D为射线OD1与所述RGB三角形的交点,OD1为色度点O与D1的距离,OD为色度点O与D的距离;
S104、采用一增益函数对相对饱和度S1进行增益运算,得到增益饱和度S2
S105、根据公式OD2=OD*S2,获取增益饱和度S2在所述RGB三角形中对应的色度点D2,并且色度点D2位于直线OD上;
S106、计算色度点D2对应的RGB数据,得到增大饱和度后的RGB数据。
其中,所述增益函数的取值范围是0~1。
其中,在相对饱和度S1从0增大到1的范围内,饱和度的增益量△S先增大再减小。
其中,所述增益函数为正弦函数,公式为
Figure PCTCN2014088151-appb-000002
其中,对所述相对饱和度进行增益运算时,色相和亮度保持不变。
本发明的另一方面是提供一种用于显示器的图像色彩增强装置,包括:
数据采集模块,用于采集显示器显示的图像的CIE1931色彩空间的三色刺激值,并计算相应的色度值和亮度值,并根据色度值绘制所述显示器的色域范围的RGB三角形;
初始饱和度计算模块,用于计算任意色度点D1的相对饱和度为S1
增益函数生成模块,用于提供一增益函数;
饱和度增强模块,利用所述增益函数对所述相对饱和度S1进行增益运算,输出增益饱和度S2
数据生产模块,根据增益饱和度S2计算得到增大饱和度后的RGB数据。
其中,所述初始饱和度计算模块获取相对饱和度S1的过程包括:
对于任意一组RGB数据在所述RGB三角形中对应的色度点D1,定义其相对饱和度为
Figure PCTCN2014088151-appb-000003
其中,O为RGB=(255,255,255)对应的色度点,D为射线OD1与所述RGB三角形的交点,OD1为色度点O与D1的距离,OD为色度点O与D的距离。
其中,所述数据生产模块计算增大饱和度后的RGB数据的过程包括:
根据公式OD2=OD*S2,确定增益饱和度S2在所述RGB三角形中对应的色度点D2;其中,色度点D2位于直线OD上;
计算色度点D2对应的RGB数据,得到增大饱和度后的RGB数据。
其中,所述增益函数的取值范围是0~1。
其中,在相对饱和度S1从0~1的取值范围内,饱和度的增益量△S先增大再减小。
其中,所述增益函数为正弦函数,公式为
Figure PCTCN2014088151-appb-000004
有益效果:
本发明实施例提供的用于显示器的图像色彩增强方法及装置,仅对图像的饱和度进行增强运算,增强后不会出现色偏问题;并且对于不同饱和度,在进行增强运算后具有不同的增量,可以保证在原始饱和度较高时不会出现过饱和的问题。
附图说明
图1是本发明实施例提供的图像色彩增强方法的步骤流程图。
图2是本发明实施例提供的RGB三角形的图示。
图3是本发明实施例提供的图像色彩增强装置的结构框图。
具体实施方式
为了更好地阐述本发明的技术特点和结构,以下结合实施例及其附图进行 详细描述。
实施例1
本实施例提供了一种用于显示器的图像色彩增强方法,主要用于对液晶显示器显示(LCD)的图像进行色彩增强。参阅图1和图2,如图1所示的流程图,该方法包括步骤:
步骤S101、针对显示器显示的图像中的所有RGB组合,采集CIE1931色彩空间的三色刺激值X、Y、Z,并计算相应的色度值x、y和亮度值Y。其中,所有RGB组合是指R、G、B分别取值0~255灰阶的所有组合。
步骤S102、根据计算得到的色度值获取所述显示器的色域范围的RGB三角形。本实施例得到的液晶显示器的RGB三角形如图2所示,即得到液晶显示器的色度图。
步骤S103、对于任意一组RGB数据在所述RGB三角形中对应的色度点D1,定义其相对饱和度为
Figure PCTCN2014088151-appb-000005
其中,O为RGB=(255,255,255)对应的色度点,D为射线OD1与所述RGB三角形的交点,OD1为色度点O与D1的距离,OD为色度点O与D的距离。
步骤S104、采用一增益函数对相对饱和度S1进行增益运算,得到增益饱和度S2
步骤S105、根据公式OD2=OD*S2,获取增益饱和度S2在所述RGB三角形中对应的色度点D2,并且色度点D2位于直线OD上。
步骤S106、计算色度点D2对应的RGB数据,得到增大饱和度后的RGB数据。
其中,步骤S101中,可以采用色彩分析仪测量图像的三色刺激值X、Y、Z。
其中,步骤S103中,参阅图2,该步骤首先定义了相对饱和度
Figure PCTCN2014088151-appb-000006
即,将显示器在某一色相下能显示的最大饱和度定义为1,最小值为0。因此在对饱和度进行增强时,只要饱和度的数值在0~1的范围内,就可以避免将饱和度增大到显示器能实现的饱和度范围之外的情况。由此可以选择增益函数的取值范围是0~1,在进行增益运算后得到的饱和度的数值还是在0~1的范围内。
进一步地,对于相对饱和度较弱(接近0的部分)或较强(接近1的部分)时,如果对饱和度进行增益运算后增量过大,有可能会出现图像失真的问题,因此,在本实施例中,对于某一色相在相对饱和度S1从0增大到1的范围内,进行增益运算后饱和度的增益量△S先增大再减小。
在本实施例中,对相对饱和度进行增益运算时,色相和亮度保持不变。如图2所示的,在RGB三角形中,增益饱和度S2对应的色度点D2位于直线OD上,即,与相对饱和度S1对应的色度点D1位于同一直线上。
进一步地,本实施例中选择的增益函数为正弦函数,公式为
Figure PCTCN2014088151-appb-000007
在以上公式中:
(1)当S1=0~1时,S2=0~1;
(2)令
Figure PCTCN2014088151-appb-000008
对△S求导函数得到,
Figure PCTCN2014088151-appb-000009
当ΔS′=0时,
Figure PCTCN2014088151-appb-000010
因此,
当S1∈(0,N)时,ΔS′>0,△S递增;
当S1∈(N,1)时,ΔS′<0,△S递减;
并且,S1=0或1时,△S=0,
综合以上,使用正弦函数对饱和度进行增益运算,在S1=0~1的范围内,正弦函数非线性递增变化,增益量ΔS≥0,并且△S先增大再减小,即,对于相对饱和度较弱(接近0的部分)或较强(接近1的部分)时,对饱和度进行增益运算后增量较小,保证了增益饱和度S2平滑过渡且不会出现过饱和现象,避免出现图像失真的问题。
实施例2
本实施例提供了一种用于显示器的图像色彩增强装置,如图3所示的结构框图,该装置主要包括:数据采集模块10、初始饱和度计算模块20、增益函数 生成模块30、饱和度增强模块40以及数据生产模块50。
参阅图3并参考图2,该装置主要用于执行如实施例1中提供的图像色彩增强方法的各个步骤,在该装置中:
数据采集模块10主要用于针对显示器显示的图像中的所有RGB组合,采集CIE1931色彩空间的三色刺激值X、Y、Z,并计算相应的色度值x、y和亮度值Y。其中,所有RGB组合是指R、G、B分别取值0~255灰阶的所有组合。另外,该模块还根据计算得到的色度值x、y绘制所述显示器的色域范围的RGB三角形,并将RGB三角形输入到初始饱和度计算模块20和数据生产模块50中。本实施例得到的液晶显示器的RGB三角形如图2所示,即得到液晶显示器的色度图。
初始饱和度计算模块20用于计算任意色度点D1的相对饱和度为S1。具体地,对于任意一组RGB数据(如图3中的R1G1B1)在所述RGB三角形中对应的色度点D1,定义其相对饱和度为
Figure PCTCN2014088151-appb-000011
其中,O为RGB=(255,255,255)对应的色度点,D为射线OD1与所述RGB三角形的交点,OD1为色度点O与D1的距离,OD为色度点O与D的距离。初始饱和度计算模块20将计算得到的相对饱和度为S1输入到饱和度增强模块40中。
增益函数生成模块30用于提供一增益函数,输入到饱和度增强模块40中。在本实施例中,提供的增益函数为正弦函数,其公式为
Figure PCTCN2014088151-appb-000012
由此在在相对饱和度S1从0~1的取值范围内,饱和度的增益量△S先增大再减小。
饱和度增强模块40,被配置为根据从初始饱和度计算模块20接收到的相对饱和度为S1以及从增益函数生成模块30接收到的增益函数,进行增益运算获得增益饱和度S2
数据生产模块50首先接收到增益饱和度S2,根据公式OD2=OD*S2,确定增益饱和度S2在所述RGB三角形中对应的色度点D2;其中,色度点D2位于直线OD上;然后计算色度点D2对应的RGB数据,得到增大饱和度后的RGB数据(如图3中的R2G2B2)。
综上所述,本发明实施例提供的用于显示器的图像色彩增强方法及装置,仅对图像的饱和度进行增强运算,增强后不会出现色偏问题;并且对于不同饱 和度,在进行增强运算后具有不同的增量,可以保证在原始饱和度较高时不会出现过饱和的问题。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
显然,本发明的保护范围并不局限于上诉的具体实施方式,本领域的技术人员可以对发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (17)

  1. 一种用于显示器的图像色彩增强方法,其中,包括步骤:
    S101、针对显示器显示的图像中的所有RGB组合,采集CIE1931色彩空间的三色刺激值,并计算相应的色度值和亮度值;
    S102、根据计算得到的色度值获取所述显示器的色域范围的RGB三角形;
    S103、对于任意一组RGB数据在所述RGB三角形中对应的色度点D1,定义其相对饱和度为
    Figure PCTCN2014088151-appb-100001
    其中,O为RGB=(255,255,255)对应的色度点,D为射线OD1与所述RGB三角形的交点,OD1为色度点O与D1的距离,OD为色度点O与D的距离;
    S104、采用一增益函数对相对饱和度S1进行增益运算,得到增益饱和度S2
    S105、根据公式OD2=OD*S2,获取增益饱和度S2在所述RGB三角形中对应的色度点D2,并且色度点D2位于直线OD上;
    S106、计算色度点D2对应的RGB数据,得到增大饱和度后的RGB数据。
  2. 根据权利要求1所述的图像色彩增强方法,其中,所述增益函数的取值范围是0~1。
  3. 根据权利要求2所述的图像色彩增强方法,其中,所述增益函数为正弦函数,公式为
    Figure PCTCN2014088151-appb-100002
  4. 根据权利要求3所述的图像色彩增强方法,其中,对所述相对饱和度进行增益运算时,色相和亮度保持不变。
  5. 根据权利要求1所述的图像色彩增强方法,其中,在相对饱和度S1从0增大到1的范围内,饱和度的增益量△S先增大再减小。
  6. 根据权利要求5所述的图像色彩增强方法,其中,所述增益函数为正弦函数,公式为
    Figure PCTCN2014088151-appb-100003
  7. 根据权利要求6所述的图像色彩增强方法,其中,对所述相对饱和度进 行增益运算时,色相和亮度保持不变。
  8. 根据权利要求1所述的图像色彩增强方法,其中,所述显示器为液晶显示器。
  9. 一种用于显示器的图像色彩增强装置,其中,包括:
    数据采集模块,用于采集显示器显示的图像的CIE1931色彩空间的三色刺激值,并计算相应的色度值和亮度值,并根据色度值绘制所述显示器的色域范围的RGB三角形;
    初始饱和度计算模块,用于计算任意色度点D1的相对饱和度为S1
    增益函数生成模块,用于提供一增益函数;
    饱和度增强模块,利用所述增益函数对所述相对饱和度S1进行增益运算,输出增益饱和度S2
    数据生产模块,根据增益饱和度S2计算得到增大饱和度后的RGB数据。
  10. 根据权利要去9所述的图像色彩增强装置,其中,所述初始饱和度计算模块获取相对饱和度S1的过程包括:
    对于任意一组RGB数据在所述RGB三角形中对应的色度点D1,定义其相对饱和度为
    Figure PCTCN2014088151-appb-100004
    其中,O为RGB=(255,255,255)对应的色度点,D为射线OD1与所述RGB三角形的交点,OD1为色度点O与D1的距离,OD为色度点O与D的距离。
  11. 根据权利要去10所述的图像色彩增强装置,其中,所述数据生产模块计算增大饱和度后的RGB数据的过程包括:
    根据公式OD2=OD*S2,确定增益饱和度S2在所述RGB三角形中对应的色度点D2;其中,色度点D2位于直线OD上;
    计算色度点D2对应的RGB数据,得到增大饱和度后的RGB数据。
  12. 根据权利要求11所述的图像色彩增强装置,其中,所述增益函数的取值范围是0~1。
  13. 根据权利要求12所述的图像色彩增强装置,其中,所述增益函数为正 弦函数,公式为
    Figure PCTCN2014088151-appb-100005
  14. 根据权利要求13所述的图像色彩增强装置,其中,对所述相对饱和度进行增益运算时,色相和亮度保持不变。
  15. 根据权利要求11所述的图像色彩增强装置,其中,在相对饱和度S1从0~1的取值范围内,饱和度的增益量△S先增大再减小。
  16. 根据权利要求15所述的图像色彩增强装置,其中,所述增益函数为正弦函数,公式为
    Figure PCTCN2014088151-appb-100006
  17. 根据权利要求16所述的图像色彩增强装置,其中,对所述相对饱和度进行增益运算时,色相和亮度保持不变。
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