CN104144332A - Image color adjusting method and electronic device using the same - Google Patents

Image color adjusting method and electronic device using the same Download PDF

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CN104144332A
CN104144332A CN 201410037410 CN201410037410A CN104144332A CN 104144332 A CN104144332 A CN 104144332A CN 201410037410 CN201410037410 CN 201410037410 CN 201410037410 A CN201410037410 A CN 201410037410A CN 104144332 A CN104144332 A CN 104144332A
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color
pixel data
image
component
sets
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CN104144332B (en
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李姗
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华硕电脑股份有限公司
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Abstract

An image color adjusting method and an electronic device thereof are provided. The color adjusting method is applied to an electronic device equipped with an image processing function for image color adjustment. The image color adjusting method includes following steps: obtaining multiple groups of first pixel data of an image in a first color space, and performing a color space transforming process for the first pixel data to obtain multiple groups of second pixel data of the image in a CIELAB color space, wherein each of the second pixel data includes a luminance component (L*), a first color component (a*) and a second color component (b*); adjusting the first color component (a*) and the second color component (b*) of the second pixel data to obtain multiple groups of third pixel data, and performing a color space transforming process for the third pixel data to obtain multiple groups of fourth pixel data corresponding to the third pixel data in the first color space.

Description

图像色彩调整方法与其电子装置 Image color adjustment method of an electronic device therewith

技术领域 FIELD

[0001] 本发明是关于一种图像处理方法与其电子装置,且特别是关于一种可增强色彩饱和度的图像色彩调整方法与其电子装置。 [0001] The present invention relates to an electronic device and its image processing method, and more particularly relates to an enhanced color image of the color saturation adjusting method of an electronic device therewith.

背景技术 Background technique

[0002] 随着显示科技的进步,图像显示功能已经被大量应用于各种类型的电子装置中, 以作为一种信息的传输手段与方法。 [0002] As display technology advances, the image display function has been widely applied to various types of electronic devices, as a means of transmission and a method of information. 更进一步而言,使用者可以根据其所在的地点、场合、 时间等因素,选择在合适的电子装置上拨放相关图像或画面。 Still further, it may in the user's place, occasion, time and other factors, select or screen Bofang related image on a suitable electronic device. 举例而言,在平板电脑等手持装置或者是电视等大型家电播放图像。 For example, in large appliances like tablet, or handheld devices playing television image. 然而不论在何种装置上播放图像,为了让使用者能取得高质量的图像与较鲜艳的色彩,各种不同的图像处理方法相继被提出,并且运用于不同的装置中。 However, regardless of the player images on any device, in order to allow users to obtain high-quality images with more vibrant colors, a variety of different image processing methods have been proposed and used in different devices.

[0003] 在追求高质量的图像中,提升图像的色彩饱和度可以使观看者观赏到更鲜艳的色彩与较为清晰的图像。 [0003] In the pursuit of high-quality images to enhance the color saturation of the image allows the viewer to watch more vivid colors and clearer images. 举例而言,当图像的多个像素数据被定义于RGB色彩空间中时,可通过调整像素数据的红色分量、绿色分量或者是蓝色分量来调整图像的色彩饱和度。 For example, when a plurality of image pixel data are defined in the RGB color space, the pixel data by adjusting a red component, a blue component or a green component to adjust the color saturation of the image. 然而,若于RGB色彩空间中直接调整或增强图像的单一色彩分量,往往会使得图像失真,并且图像也可能在调整后过于鲜艳而造成伪轮廓现象。 However, if the direct adjustment or enhancement of a single color component of the image in RGB color space, tends to make the image distortion, and the image may be too bright after the adjustment caused by the false contour phenomenon.

发明内容 SUMMARY

[0004] 本发明提供一种音频处理方法,一种图像色彩调整方法,于特定的色彩空间中对图像进行色彩调整,以提升图像的色彩饱和度。 [0004] The present invention provides an audio processing method, an image color adjustment methods, the image color adjustment to a specific color space, to improve the color saturation of the image.

[0005] 本发明提供一种电子装置,于接收图像的像素数据后,利用图像处理单元对前述图像的像素数据进行色彩空间转换,并且于特定的色彩空间中对像素数据进行色彩调整, 以提供并显示具有较佳质量的图像。 [0005] The present invention provides an electronic device, after receiving the image pixel data, the image processing unit performs image pixel data of the color space conversion, color adjustment and pixel data in a particular color space, to provide and displaying an image having better quality.

[0006] 本发明实施例中的图像色彩调整方法用于具备图像处理能力的电子装置上,且适于对图像进行色彩调整。 Image color adjustment method in the embodiment of [0006] the present invention for an electronic apparatus includes an image processing capability, and is adapted to adjust the color image. 方法包括,取得图像于第一色彩空间中的多组第一像素数据,并且对第一像素数据进行色彩空间转换,以取得前述图像于CIELAB色彩空间中的多组第二像素数据,其中每一第二像素数据包括亮度分量(L*)、第一色彩分量(a*)与第二色彩分量(b*)。 The method includes obtaining a first plurality of sets of the image pixel data in a first color space, and pixel data of a first color space conversion to obtain a second plurality of sets of the image pixel data in the CIELAB color space, where each the second pixel data includes a luminance component (L *), a first color component (a *) and a second color component (b *). 调整第二像素数据中的第一色彩分量(a*)与第二色彩分量(b*)以取得多组第三像素数据,并且对第三像素数据进行色彩空间转换,以取得于第一色彩空间中,对应于第三像素数据的多组第四像素数据。 A first color component (a *) adjusting the second pixel data in the second color component (b *) to obtain a third plurality of sets of pixel data, pixel data and the third color space conversion, to obtain a first color space corresponding to the plurality of sets of pixel data of the third the fourth pixel data.

[0007] 本发明实施例中的电子装置具备图像处理功能且适于对图像进行色彩调整。 Embodiment [0007] of the present invention includes an electronic apparatus and an image processing function adapted to adjust the color image. 电子装置包括图像接收单元、图像处理单元以及显示屏幕。 The electronic device includes an image receiving unit, an image processing unit, and a display screen. 图像接收单元接收图像并取得图像于第一色彩空间中的多组第一像素数据。 The image receiving unit receives an image and obtain a first plurality of sets of the image pixel data in a first color space. 图像处理单元耦接图像接收单元,对第一像素数据进行色彩空间转换,以取得图像于CIELAB色彩空间中的多组第二像素数据,其中每一组第二像素数据包括亮度分量(L*)、第一色彩分量(a*)与第二色彩分量(b*)。 The image processing unit is coupled to an image receiving unit, pixel data of a first color space conversion to obtain image to CIELAB color space, a second plurality of pixel data sets, wherein each set of the second pixel data includes a luminance component (L *) , the first color component (a *) and a second color component (b *). 图像处理单元还利用色彩调整模型调整第二像素数据中的第一色彩分量(a*)与第二色彩分量(b*)以取得多组第三像素数据,并对第三像素数据进行色彩空间转换,以取得于第一色彩空间中, 对应于第三像素数据的多组第四像素数据。 The image processing unit further color adjustment using the first model adjustment color components of the second pixel data (a *) and a second color component (b *) to obtain a third plurality of sets of pixel data, pixel data and the third color space conversion, to obtain a first color space, corresponding to the fourth pixel data of the third plurality of sets of pixel data. 显示屏幕则耦接图像处理单元,用以接收并显示由前述第四像素数据所组成的图像。 A display screen is coupled to an image processing unit for receiving and displaying an image of the fourth pixel data thereof.

[0008] 基于上述,本发明实施例所提出的图像色彩调整方法以及其电子装置,将图像的像素数据由其它色彩空间转换至CIELAB色彩空间中并进行色彩调整。 [0008] Based on the above-described image color adjustment methods, the proposed embodiment of the present invention and its electronics, the pixel data of an image is converted by the CIELAB color space into another color space, and color adjustment. 通过本发明实施例所提出的色彩调整模型,图像色彩调整方法进一步地调整像素数据于CIELAB色彩空间中的第一色彩分量与第二色彩分量,进而提升图像的色彩饱和度,并将经调整后的像素数据重新转至原本的色彩空间以方便输出与显示。 By adjusting the color model proposed by embodiments of the invention, an image color adjustment method further adjustment of the pixel data in the CIELAB color space of the first color component and second color component, thereby enhancing the color saturation of the image, and the adjusted go back pixel data of the original color space to facilitate the display output. 鉴于此,图像的色彩饱和度可以被提升以增加画面的鲜艳程度,并且同时避免图像失真等缺陷。 In view of this, the color saturation of the image can be lifted to increase the vividness of the screen, while avoiding image distortion and other defects.

[0009] 为让本发明的上述特征和优点能更明显易懂,下文特举实施例,并配合所附图式作详细说明如下。 [0009] In order to make the above features and advantages of the present invention can be more fully understood, the following non-limiting embodiment, and the accompanying figures are described in detail below.

附图说明 BRIEF DESCRIPTION

[0010] 图1是根据本发明一实施例的电子装置的方块示意图。 [0010] FIG. 1 is a block schematic diagram of an electronic device according to an embodiment of the present invention.

[0011] 图2是根据本发明一实施例的图像色彩调整方法的流程图。 [0011] FIG 2 is a flowchart of a method for adjusting the image color to an embodiment of the present invention.

[0012] 图3是本发明另一实施例的图像色彩调整方法的流程图。 [0012] FIG. 3 is a flowchart of a method of adjusting the image color to another embodiment of the present invention.

[0013] 图4是本发明一实施例的色彩调整模型的示意图。 [0013] FIG. 4 is a schematic model of color adjustment according to an embodiment of the present invention.

具体实施方式 Detailed ways

[0014] 现将详细参考本发明实施例,在附图中说明。 [0014] The present invention will now be detailed with reference to embodiments illustrated in the drawings. 另外,凡可能之处,在图式及实施方式中使用相同标号的元件/构件/符号,代表相同或类似部分。 Wherever possible, the same reference numerals used in the drawings and the description part of the same or similar elements / components / symbol representative.

[0015] 本发明实施例所提供的图像色彩调整方法,用于具备图像处理功能的电子装置上,且适于对图像进行色彩调整。 Image color adjustment method provided by the embodiment [0015] of the present invention, apparatus is provided for the electronic image processing function, and is adapted to adjust the color image. 一般而言,图像由多个像素所构成,故图像数据包括定义于某一色彩空间(Color Space)中的多组像素数据,而本发明实施例所提供的图像色彩方法会对前述多组像素数据进行色彩空间转换(Color Space Transform),以便在CIELAB色彩空间中利用色彩调整模型对图像进行色彩调整,以避免图像失真。 Generally, an image consists of a plurality of pixels, so that the image data includes a plurality of sets of pixel data are defined in a color space (Color Space), a plurality of sets of pixels and color image embodiment of the present invention the method provided would be the data, color space conversion (color space Transform), in order to adjust the color image using the color adjustment in the CIELAB color space model, in order to avoid image distortion.

[0016] 图1是根据本发明实施例的电子装置的方块示意图。 [0016] FIG. 1 is a block schematic diagram of an electronic device according to an embodiment of the present invention. 请参照图1,电子装置100包括图像接收单元120、图像处理单元(Image Processing Unit, IPU) 140以及显示屏幕160, 且具备图像处理功能而适于对图像进行色彩调整。 Referring to FIG 1, the electronic apparatus 100 includes an image receiving unit 120, an image processing unit (Image Processing Unit, IPU) 140, and a display screen 160, and an image processing function adapted to adjust the color image. 更详细地来说,图像接收单元120由外部接收图像,并且将图像的多组像素数据传输至图像处理单元140。 In more detail, the image receiving unit 120 externally receives an image, and the plurality of sets of pixels of the image data to the image processing unit 140. 图像处理单元140耦接至图像接收单元120,接收并对图像进行图像处理(Image Processing)。 The image processing unit 140 is coupled to the image receiving unit 120 receives the image and performs image processing (Image Processing). 经处理后的图像被输出至显示屏幕160,并且由显示屏幕160显示经图像处理后的图像。 After the image processing is output to the display screen 160, and the image-processed image displayed by the display screen 160. 显示屏幕160可以为液晶显示屏幕(LCD Display)或者是发光二极管显示屏幕(LED Display),然本发明并不以此为限。 Display screen 160 may be a liquid crystal display screen (LCD Display) display screen or a light emitting diode (LED Display), however the present invention is not limited thereto.

[0017] 图2是根据本发明实施例的图像色彩调整方法的流程图。 [0017] FIG 2 is a flowchart illustrating an image adjustment method according to an embodiment of the present invention, the color is. 请参照图1与图2,图像色彩调整方法包括下列步骤。 Referring to FIG 1 and FIG 2, the image color adjustment method comprises the following steps. 于步骤S220中,图像接收单元120取得图像于第一色彩空间中的多组第一像素数据。 In step S220, the image receiving unit 120 obtains a first plurality of sets of the image pixel data in a first color space. 于本实施例中,第一色彩空间为红-绿-蓝(RGB)色彩空间,而每一组第一像素数据分别包括红色分量(Red Component)、绿色分量(Green Component)以及蓝色分量(Blue Component)。 In the present embodiment, the first color space to the red - green - blue (RGB) color space, and each set of pixel data each comprising a first component of a red (Red Component), green component (Green Component) and blue component ( Blue Component). 但于本发明其它实施例中,第一色彩空间并不限于红-绿-蓝色彩空间,而可以为其它类型的色彩空间,例如是印刷四分色(CMYK)色彩空间。 However, in other embodiments of the present invention, the first color space is not limited to a red - green - blue color space, but may be other types of color space, such as a printed CMYK (CMYK) color space.

[0018] 接着,于步骤S240中,图像处理单元140接收前述的多组第一像素数据,并且对第一像素数据进行色彩空间转换,以取得图像于CIELAB色彩空间中的多组第二像素数据。 [0018] Next, in step S240, the image processing unit 140 receives the plural sets of first pixel data and the pixel data of a first color space conversion, to obtain an image in CIELAB color space plurality of sets of second pixel data . 于CIELAB色彩空间的定义下,第二像素数据包括亮度分量(Luminance Component, L*)、第一色彩分量(First Color Component, a*)与第二色彩分量(Second Color Component, b*)。 Definition in CIELAB color space, the second pixel data includes a luminance component (Luminance Component, L *), a first color component (First Color Component, a *) and a second color component (Second Color Component, b *). 更详细而言,亮度分量(L*)代表单一像素的亮度,第一色彩分量(a*)代表单一像素颜色在红色与绿色(对立色)间的偏向程度,而第二色彩分量(b*)代表单一像素颜色在黄色与蓝色(对立色)间的偏向程度。 More specifically, the luminance component (L *) represent a single pixel of the luminance, first color component (a *) representative of a single pixel degree of deflection between the red and green color (opponent color), and the second component color (b * ) the degree of bias on behalf of a single pixel color between yellow and blue (the opposite color). 由于CIELAB色彩空间中具有视觉上的均匀性,故在CIELAB 色彩空间进行色彩调整,可以较正确地对应至视觉上所感知的色彩变化。 Because CIELAB color space having visual uniformity, so that color adjustment in the CIELAB color space, the color change visually perceived to be more properly correspond.

[0019] 于本实施例中,第一色彩空间为红-绿-蓝色彩空间,然而需注意的是,红-绿-蓝色彩空间与CIELAB色彩空间中的像素数据无法直接转换。 [0019] In the present embodiment, the first color space to the red - green - blue color space, however, to be noted that, red - green - blue pixel data and color space CIELAB color space can not be directly converted. 故于本实施例中,更需通过一个过渡色彩空间,例如是CIEXYZ色彩空间来协助将图像于红-绿-蓝色彩空间中的第一像素数据转换为前述图像于CIELAB色彩空间中的第二像素数据。 Therefore, in the present embodiment, a transition by more necessary color space, a CIEXYZ color space, for example, to assist the image on the red - green - blue first converted pixel data color space is the CIELAB color space to a second image in pixel data. 具体的做法为对第一像素数据进行色彩空间转换以取得于过渡色彩空间中,对应于第一像素数据的过渡像素数据。 Specific approaches for the first pixel data to obtain color space conversion in color space in the transition, the transition corresponding to the pixel data of the first pixel data. 接着,再对过渡像素数据进行色彩空间转换以得到于CIELAB色彩空间中,对应于过渡像素数据的第二像素数据。 Next, another transition pixel data color space conversion on the second pixel data to obtain the CIELAB color space, the pixel data corresponding to the transition.

[0020] 于步骤S260中,图像处理单元140利用色彩调整模型调整每一第二像素数据中的第一色彩分量(a*)与第二色彩分量(b*)以取得多组第三像素数据。 [0020] In step S260, a first color component (a *) and a second color component (b *) using the color image processing unit 140 to adjust the model to adjust each of the second pixel data to obtain a third plurality of pixel data sets . 本发明实施例中所提出的色彩调整模型为: Color adjustment model proposed in embodiments of the present invention is:

[0021] [0021]

Figure CN104144332AD00061

方程式⑴ ⑴ equation

[0022] 其中X为所输入的第一色彩分量(a*)或第二色彩分量(b*),f(x)为第一色彩分量(a*)或第二色彩分量(b*)映射至0〜1范围间的色彩映射值,参数t与γ为控制参数, 参数P与q为限制参数,而g(x)为将色彩映射值经色彩调整模型调整后的色彩调整值。 [0022] wherein X is a color component of a first input (a *) or the second color component (b *), f (x) as a first color component (a *) or the second color component (b *) is mapped color map to a value between a range of 0~1, the parameter t and γ is a control parameter, the parameter P and q as limiting parameters, and g (x) is the value of the color map the color adjustment value adjusted by the color adjustment model. 在本发明一实施例中,限制参数P与q较佳为一整数。 In an embodiment of the present invention, preferred restriction parameters P and q is an integer.

[0023] 图4是本发明一实施例所示为的色彩调整模型的示意图。 [0023] FIG. 4 is a schematic diagram of the color adjustment model for the embodiment shown embodiment of the invention. 请参照图4以及前述色彩调整模型(方程式1),图4中的曲线为色彩调整模型(方程式1)中的色彩映射值f(x) 与色彩调整值g(x)间的对应关系,换言之,即为输入的第一色彩分量(a*)或第二色彩分量(b*)与输出的第一色彩分量(a*)或第二色彩分量(b*)间的对应关系。 Referring to FIG. 4 and the color adjustment model (Equation 1), the graph of Figure 4 is a corresponding relationship between g (x) color adjustment model (Equation 1) in the color map value f (x) and color adjustment value, in other words , a correspondence between a first component of a first color component of the color (a *) or the second color component (b *) is the input and the output of the (a *) or the second color component (b *). 利用色彩调整模型(方程式1)调整第二像素数据中的第一色彩分量(a*)与第二色彩分量(b*)时,所输入的第一色彩分量(a*)或第二色彩分量(b*)会先被映射至0〜1的范围间以取得色彩映射值f(x),并且于色彩调整后将色彩调整值g(x)重新映射回第一色彩分量(a*)或第二色彩分量(b*)的数值范围之中,以取得多组第三像素数据。 When adjusting the first color component of the second pixel data (a *) using the color adjustment model (Equation 1) and a second color component (b *), a first color component (a *) or the second input color component (b *) will first be mapped to the range of 0~1 between the color map to obtain the value f (x), and the color after color adjustment in the adjustment value g (x) remapped back to the first color component (a *) or among the range of the second color component values ​​(b *), in order to obtain a third plurality of sets of pixel data. 第三像素数据同样包括亮度分量(L*)、第一色彩分量(a*)与第二色彩分量(b*)。 Also the third pixel data includes a luminance component (L *), a first color component (a *) and a second color component (b *).

[0024] 于本实施例中,通过调整控制参数t与Y以及限制参数p与q,第一色彩分量(a*) 与第二色彩分量(b*)的改变幅度可以对应地调整。 [0024] In the present embodiment, by adjusting the control parameter t with Y and the restriction parameter p and q, the first color component (a *) and a second color component (b *) of the magnitude of change may be correspondingly adjusted. 控制参数t与Y可决定第一色彩分量(a*)与第二色彩分量(b*)受调整的程度,而限制参数p与q则用于限制第一色彩分量(a*)与第二色彩分量(b*)以避免第一色彩分量(a*)与第二色彩分量(b*)受过度增幅而导致图像色彩发生过饱和的情形。 Control parameter t and Y may decide a first color component (a *) and a second color component (b *) by adjusting the degree of limitation and the parameters p and q for limiting the first color component (a *) and a second color component (b *) in order to prevent the first color component (a *) and a second color component (b *) caused by an excessive increase in the case of image color saturation occurred. 于本发明实施例中,较佳的是,控制参数t与Y符合与0.99彡t彡1.91,而限制参数ρ与q符合与0〈q彡1。 In the embodiment of the invention, it is preferable that the control parameter t and Y t meet San San 1.91 and 0.99, and the restriction parameters ρ and q as compliance with 0 <q San 1.

[0025] 如同前述,于CIELAB色彩空间中,第一色彩分量(a*)代表单一像素颜色在红色与绿色(对立色)间的偏向程度,而第二色彩分量(b*)代表单一像素颜色在黄色与蓝色(对立色)间的偏向程度。 [0025] As aforementioned, in the CIELAB color space, the first color component (a *) represent a single pixel color deviation degree between red and green (opponent color), and the second color component (b *) represent a single pixel color in the yellow and blue (the color opposites) between the degree of deflection. 因此,于图4的对应关系中,若所输入的色彩映射值f(x)越偏向1, 则代表第一色彩分量(a*)越偏向红色,或者是代表第二色彩分量(b*)越偏向黄色。 Accordingly, in the map of FIG. 4, when the input color map value f (x) toward the 1, represents a first color component (a *) toward the red or the representatives of the second color component (b *) the more yellow bias. 反之, 若所输入的色彩映射值f(x)越偏向〇,则代表第一色彩分量(a*)越偏向绿色,或者是代表第二色彩分量(b*)越偏向蓝色。 Conversely, if the input color map value f (x) toward the square, the first component represents the color (a *) more towards green, or representative of a second color component (b *) more bluish. 由图4可知,色彩调整模型具有调整色彩分量在对立色间偏向程度的能力。 Figure 4 shows that color adjustment model has the ability to adjust the degree of deflection between the color components of opponent color. 举例来说,当所输入的色彩映射值f(x)为0.8,则经过色彩调整模型(方程式1)调整后,于图4中所输出的色彩调整值为0.9。 For example, when the color map value f (x) is the input 0.8, the color after adjustment model (Equation 1) after the adjustment, color adjustment in FIG 4 is the output value 0.9. 若X为第一色彩分量(a*),则代表其经颜色模型调整后,越偏向红色,而若X为第二色彩分量(b*),则代表其越偏向黄色。 If X is a first color component (a *), which represents the color model, after adjustment, the red bias, and if X is a second color component (b *), which represents the bias yellow.

[0026] 于CIELAB色彩空间中,色度C*的定义为: [0026] in the CIELAB color space, chroma C * is defined as:

[0027] [0027]

Figure CN104144332AD00071

方程式⑵ ⑵ equation

[0028] 而色彩饱和度则定义如下: [0028] and the color saturation is defined as follows:

[0029] [0029]

Figure CN104144332AD00072

方程式(3) Equation (3)

[0030] 一般而言,CIELAB色彩空间中的第一色彩分量(a*)与第二色彩分量(b*)的数值范围符合-R彡a*彡R与-R彡b*彡R,其中R为任一整数。 [0030] In general, a first color component in the CIELAB color space (a *) and a second color component (b *) in line with the numerical range of a * San San -R and R -R b * San San R, wherein R is any integer. 如同前述,由于色彩调整模型(方程式1)具有调整色彩分量在对立色间偏向程度的能力,因此对图像(或者其像素)而言,图像处理单元140通过调整控制参数t与γ,可以使色度C*会相对增加,在不影响图像的亮度L*的情形下,进而提升其色彩饱和度。 As mentioned above, since the color adjustment model (Equation 1) has the ability to adjust the degree of deflection of the color components between the opposite color, so an image (or a pixel), the image processing unit 140 by adjusting the control parameters and gamma] t, color can ° C * relative increase in brightness of an image without affecting the case of L *, thereby improving color saturation.

[0031] 重新参照图1与图2,取得多组第三像素数据后,图像处理单元140于步骤S280 中,对多组第三像素数据进行色彩空间转换,以取得于第一色彩空间中,对应于第三像素数据的多组第四像素数据。 [0031] Referring again to Figures 1 and 2, after obtaining the third plurality of sets of pixel data, the image processing unit 140 in step S280, a plurality of sets of pixel data of the third color space conversion, to obtain a first color space, corresponding to the fourth pixel data of the third plurality of sets of pixel data. 于本实施例中,第一色彩空间为红-绿-蓝色彩空间,故第四像素数据同样包括红色分量、绿色分量以及蓝色分量。 In the present embodiment, the first color space to the red - green - blue color space, so the fourth pixel data also includes a red component, a green component and a blue component.

[0032] 图3是本发明另一实施例的图像色彩调整方法的流程图。 [0032] FIG. 3 is a flowchart of a method of adjusting the image color to another embodiment of the present invention. 于本实施例中,利用色彩调整模型(方程式1)调整每一组第二像素数据中的第一色彩分量(a*)与第二色彩分量(b*)的方法,更可以被细分为对第二像素数据进行色彩增强处理以及对部分的第二像素数据进行色彩调整处理。 The method of the present embodiment, by using color adjustment model (Equation 1) adjusting a first set of the second color component in each pixel data (a *) and a second color component (b *), but can be subdivided into the second color pixel data for the enhancement and for the second portion of the pixel data for color adjustment processing. 参照图3,于步骤S240中对第一像素数据进行色彩空间转换,取得图像于CIELAB色彩空间中的多组第二像素数据后,图像处理单元140于步骤S262中,利用色彩调整模型(方程式1),增强第二像素数据中的第一色彩分量(a*)与第二色彩分量(b*)。 Referring back to FIG 3, in step S240, pixel data of a first color space conversion, obtaining a second plurality of sets of the image pixel data in the CIELAB color space, the image processing unit 140 in step S262, the color adjustment using a model (Equation 1 ), a first reinforcing component of the second color pixel data (a *) and a second color component (b *). 通过调整控制参数t与γ以及限制参数p与q,色彩调整模型(方程式1)可如同图4中的对应关系般调整第一色彩分量(a*)与第二色彩分量(b*),以增强第一色彩分量(a*)与第二色彩分量(b*),进而达到提升第二像素数据的色彩饱和度(Color Saturation)的目的。 By adjusting the control parameter γ t and p and limit parameter q, color adjustment model (Equation 1) can be adjusted as a first color component (a *) and a second color component (b *) as in FIG. 4 in correspondence relationship, to enhanced first color component (a *) and a second color component (b *), thus achieving the purpose to enhance the color saturation of the second pixel data (color saturation) of.

[0033] 除了对第二像素数据中的第一像素数据与第二像素数据进行色彩增强处理之外, 本实施例还包括对于图像中肤色区域的色彩调整。 [0033] In addition to the first pixel data and second pixel data of the second pixel data for color enhancement processing, the present embodiment further comprises a color adjustment for a color image area. 若图像中具有呈现肤色的肤色区域(通常代表图像中有人物的存在),则图像处理单元140会于步骤S262中的色彩增强处理后, 更进一步地调整对应于肤色区域的第二像素数据的第一色彩分量(a*)与第二色彩分量(b*),以使显示屏幕160更佳地表现图像中呈肤色的肤色区域。 If the color image having color rendering region (usually represent the presence of a person in the image), the image processing unit 140 in step S262 will enhance the color of the post-processing, further adjusting the second pixel data corresponding to skin color region a first color component (a *) and a second color component (b *), so that the display screen 160 in the form of the image behave better skin color region.

[0034] 参照图3,于步骤S220中取得图像于第一色彩空间中的多组第一像素数据后,图像处理单元140更进一步地于步骤S242中,对多组第一像素数据进行色彩空间转换,以取得图像于第二色彩空间中的多组第五像素数据。 After [0034] Referring to FIG 3, to obtain a first plurality of sets of the image pixel data in a first color space in step S220, the image processing unit 140 further in step S242, the first of the plurality of sets of pixel data color space conversion, to obtain an image in the second color space fifth plurality of sets of pixel data. 举例而言,第二色彩空间可以为HSV色彩空间,而每一第五像素数据包括色相分量(H)、饱和度分量(S)以及亮度分量(V)。 For example, the second color space may be an HSV color space, and each pixel data of the fifth component includes the hue (H), the saturation component (S) and the luminance component (V). 接着,于步骤S244中,对多组第五像素数据进行肤色检测,以判断图像中是否具有呈肤色的肤色区域。 Next, in step S244, a plurality of sets of the fifth pixel color detection data, to determine whether the image as a skin color region. 参照图1,图像处理单元140中还包括有肤色检测单元142,以检测图像中的肤色区域。 Referring to FIG. 1, the image processing unit 140 further comprises a skin color detecting unit 142 to detect skin color regions in an image. 以HSV色彩空间为例,肤色检测单元142通过分别设定色相分量(H)、饱和度分量(S)以及亮度分量(V)于适当范围并对第五像素数据进行比对,判断图像中是否具有肤色区域。 In an HSV color space as an example, skin color detection unit 142, respectively, by setting the hue component (H), the saturation component (S) and the luminance component (V) and the fifth pixel data is in an appropriate range for comparison, it is determined whether the image It has a skin area.

[0035] 若图像中不具有肤色区域,则于步骤S262中,通过色彩调整模型(方程式1)调整后所得的多组第三像素数据会被取得,并且图像处理单元140在步骤S280中取得于第一色彩空间中对应于第三像素数据的第四像素数据。 [0035] If the image does not have a skin color region, then in step S262, the plurality of sets of obtained data of the third pixel is acquired after adjusted by adjusting the color model (Equation 1), and the image processing unit 140 in step S280 to obtain the first color space corresponding to the pixel data of the third the fourth pixel data. 反之,若图像中具有肤色区域,则图像处理单元140还于步骤S264中,利用色彩调整模性(方程式1)调整部分的第二像素数据的第一色彩分量(a*)与第二色彩分量(b*),而前述部分的第二像素数据对应于图像中的肤色区域。 Conversely, if an image having a color area, the image processing unit 140 also in step S264, the adjustment mode of the use of color (Equation 1) adjusting the second color component data of a first pixel portion (a *) and a second color component (b *), and the second portion of the pixel data corresponding to the image of the skin area.

[0036] 更详细而言,通过调整控制参数t与Y以及限制参数p与q,色彩调整模型(方程式1)同样也可用于对肤色区域的调整。 [0036] More specifically, by adjusting the control parameter t with Y and the restriction parameter p and q, color adjustment model (Equation 1) also may be used to adjust the skin color area. 值得注意的是,于步骤S262与步骤S264中,色彩调整模型(方程式1)的控制参数t与γ以及限制参数p与q,在设定上并不一致。 Notably, in step S262 and step S264, color adjustment model (Equation 1) and the control parameter γ t and p and limit parameter q, is not consistent in the set. 相较于步骤S262中用于增强第二像素数据的第一色彩分量(a*)与第二色彩分量(b*)的色彩调整模型(方程式1),用于步骤S264中的色彩调整模型(方程式1)具有较低的控制参数t 与Y值,以适当地降低肤色区域的色彩饱和度。 Color adjustment model (equation 1) compared to the first step S262 for the enhancement of the second color component of pixel data (a *) and a second color component (b *), the color adjustment of the model used in step S264 ( equation 1) having a lower control parameter value Y t and to suitably reduce the color saturation of the skin-color region. 最后,图像处理单元140取得经步骤S262 与步骤S264所调整的第三像素数据后,于步骤S280中取得第一色彩空间中,对应于第三像素数据的第四像素数据。 Finally, a third image processing unit 140 acquires the pixel data in step S262 is adjusted in step S264, in step S280, obtaining a first color space, corresponding to the fourth data of the third pixel of the pixel data.

[0037] 综上所述,本发明实施例所提供的图像色彩调整方法以及电子装置,可以将图像中定义于其它色彩空间的像素数据,转换至CIELAB色彩空间,并且通过所提出的色彩调整模型,在不使图像失真或过于鲜艳的情况下,调整图像的色彩饱和度。 [0037] In summary, a method and an electronic image color adjustment device according to the present invention is provided, an image may be defined in the pixel data of the other color space, the conversion to the CIELAB color space, and the color adjustment model proposed by , without the image distortion or too bright, adjust the color saturation of the image. 此外,图像色彩调整方法还可以检测图像中是否存在呈肤色的肤色区域,并且针对图像中的肤色区域,利用相同的色彩调整模型进行调整,以使显示屏幕能更佳地呈现图像中的肤色区域。 Further, the image color adjustment method may further detect whether the image is present as a skin color region, and for a skin-color region in the image, using the same color adjustment model is adjusted, so that the display screen can be presented better color region in the image .

[0038] 虽然本发明已以实施例揭露如上,然其并非用以限定本发明,任何所属技术领域中具有通常知识者,在不脱离本发明的精神和范围内,当可作些许的还动与润饰,故本发明的保护范围当视权利要求书所界定者为准。 [0038] Although the present invention has been disclosed in the above embodiments, they are not intended to limit the present invention, any skilled in the art having ordinary knowledge, without departing from the spirit and scope of the present invention, it can make some further action and variations, so the scope of the invention is best defined by the appended claims and their equivalents.

Claims (14)

1. 一种图像色彩调整方法,用于具备图像处理功能的电子装置,其特征是,上述图像色彩调整方法包括: 取得图像于第一色彩空间中的多组第一像素数据; 对上述多组第一像素数据进行色彩空间转换,以取得上述图像于CIELAB色彩空间中的多组第二像素数据,其中每一上述第二像素数据包括亮度分量(L*)、第一色彩分量(a*) 与第二色彩分量(b*); 调整上述多组第二像素数据中的上述第一色彩分量(a*)与上述第二色彩分量(b*)以取得多组第三像素数据;以及对上述多组第三像素数据进行色彩空间转换,以取得于上述第一色彩空间中,对应于上述多组第三像素数据的多组第四像素数据。 An image color adjustment method for an electronic apparatus includes an image processing function, characterized in that the image color adjustment method comprising: obtaining a first plurality of sets of the image pixel data in a first color space; the above-described plurality of sets a first pixel data color space conversion, to obtain a second plurality of sets of the image pixel data in the CIELAB color space, wherein each of said second pixel data includes a luminance component (L *), a first color component (a *) and a second color component (b *); adjusting the color component of said first plurality of sets of second pixel data (a *) of the second color component (b *) to obtain a third plurality of sets of pixel data; and said plurality of sets of pixel data for the third color space conversion, to obtain in the first color space, corresponding to the third plurality of sets of pixel data of a plurality of sets of data of the fourth pixel.
2. 如权利要求1所述的图像色彩调整方法,其特征是,其中上述第一色彩空间为红-绿-蓝(RGB)色彩空间,且每一上述第一像素数据与每一上述第四像素数据分别包括红色分量(R)、绿色分量(G)以及蓝色分量(B)。 The image color adjustment method according to claim 1, characterized in that the first color space to the red - green - blue (RGB) color space, and each of the first pixel data of each of the fourth pixel data include a red component (R), green component (G) and blue component (B).
3. 如权利要求1所述的图像色彩调整方法,其特征是,其中上述色彩调整模型为: The image color adjustment method according to claim 1, characterized in that the color adjustment model:
Figure CN104144332AC00021
⑴ 其中X为所输入的上述第一色彩分量(a*)或上述第二色彩分量(b*),f(x)为上述第一色彩分量(a*)或上述第二色彩分量(b*)映射至0〜1范围间的色彩映射值,参数t与Y为控制参数,参数P与q为限制参数,而g(x)为将上述色彩映射值f(x)经上述色彩调整模型调整后的色彩调整值。 ⑴ wherein X is a color component of said first input (a *) or said second color component (b *), f (x) is a component of said first color (a *) or said second color component (b * ) mapped to the color map value between the range of 0~1, the parameter t and Y is a control parameter, the parameter P and q as limiting parameters, and g (x) is adjusted to the above-described color adjustment model above-described color map value f (x) value after color adjustment.
4. 如权利要求3所述的图像色彩调整方法,其特征是,其中上述这些控制参数t与γ 符合0彡Y彡4与0.99彡t彡1.91,而上述这些限制参数p与q符合0〈p彡2与0〈q彡1。 The image color adjustment method according to claim 3, characterized in that the control of these parameters t 0 and γ meet San San 4 and Y t San San 0.99 1.91, and said restriction parameters p and q which meet 0 < San 2 and p 0 <q San 1.
5. 如权利要求1所述的图像色彩调整方法,其特征是,其中调整上述这些第二像素数据中的上述第一色彩分量(a*)与上述第二色彩分量(b*)的步骤包括: 增强上述这些第二像素数据中的上述第一色彩分量(a*)与上述第二色彩分量(b*), 以提升上述这些第二像素数据的色彩饱和度。 The image color adjustment method according to claim 1, characterized in that, wherein the adjusting the second pixel of the first color component data (a *) of the second color component (b *) comprises the step of : enhanced these second pixel of the first color component data (a *) of the second color component (b *), to enhance the color saturation of the second of these pixel data.
6. 如权利要求5所述的图像色彩调整方法,其特征是,还包括: 对上述这些第一像素数据进行色彩空间转换,以取得上述图像于第二色彩空间中的多组第五像素数据;以及对上述这些第五像素数据进行肤色检测,以判断上述图像中是否具有呈肤色的肤色区域; 其中,若上述图像中具有上述肤色区域,则于增强上述这些第二像素数据的色彩饱和度后,调整部分的上述这些第二像素数据的上述第一色彩分量(a*)与上述第二色彩分量(b*),其中前述部分的上述这些第二像素数据对应于上述图像中的上述肤色区域。 The image color adjustment method according to claim 5, characterized in that, further comprising: each of the first pixel data color space conversion, to obtain the image data of the fifth pixel in the plurality of sets of the second color space ; and these fifth pixel color detection data to determine whether the image in the form of a skin color area; wherein, if the image having the above-described skin color area, to enhance the color saturation of these second pixel data after adjusting these color component of said first portion of the second pixel data (a *) of the second color component (b *), wherein these second pixel data corresponding to the portion of the image in the skin region.
7. 如权利要求6所述的图像色彩调整方法,其特征是,其中上述第二色彩空间为HSV 色彩空间,而每一上述这些第五像素数据包括色相分量(H)、饱和度分量(S)以及亮度分量(V)。 7. The method of adjusting an image color saturation component 6 (S, characterized in that the second color space is an HSV color space, and each of these components of the fifth pixel data includes a hue (H), ) and the luminance component (V).
8. -种电子装置,具备图像处理功能,其特征是,上述电子装置包括: 图像接收单元,接收图像并取得上述图像于第一色彩空间中的多组第一像素数据; 图像处理单元,耦接上述图像接收单元,对上述多组第一像素数据进行色彩空间转换, 以取得上述图像于CIELAB色彩空间中的多组第二像素数据,其中每一上述多组第二像素数据包括亮度分量(L*)、第一色彩分量(a*)与第二色彩分量(b*),上述图像处理单元利用色彩调整模型调整上述多组第二像素数据中的上述第一色彩分量(a*)与上述第二色彩分量(b*)以取得多组第三像素数据,并对上述多组第三像素数据进行色彩空间转换,以取得于上述第一色彩空间中,对应于上述多组第三像素数据的多组第四像素数据;以及显示屏幕,耦接上述图像处理单元,用以接收并显示由上述多组第四像素数据所组成的上 8. - electronic device, comprising an image processing function, wherein said electronic device comprising: an image receiving unit that receives an image and obtaining the image of the first color space set of the first plurality of pixel data; an image processing unit, coupled then the image receiving means, a first of said plurality of sets of pixel data for color space conversion, to obtain a second plurality of sets of the image pixel data in the CIELAB color space, wherein each of said plurality of sets of second pixel data includes a luminance component ( L *), a first color component (a *) and a second color component (b *), the image processing means adjusts the model using the color adjusting color component of said first plurality of sets of second pixel data (a *) and said second color component (b *) to obtain a third plurality of sets of pixel data, and said plurality of sets of pixel data for the third color space conversion, to obtain in the first color space, corresponding to the plurality of sets of third pixel a plurality of sets of data of the fourth pixel data; and a display screen, coupled to the image processing unit for receiving and displaying a plurality of sets of the above-described fourth pixel data consisting of 述图像。 Said image.
9. 如权利要求8所述的电子装置,其特征是,其中上述第一色彩空间为红-绿-蓝(RGB)色彩空间,且每一上述这些第一像素数据与每一上述这些第四像素数据分别包括红色分量(R)、绿色分量(G)以及蓝色分量(B)。 The electronic device according to claim 8, characterized in that the first color space to the red - green - blue (RGB) color space, and each pixel data of these first and fourth each of these pixel data include a red component (R), green component (G) and blue component (B).
10. 如权利要求8所述的电子装置,其特征是,其中上述色彩调整模型为: The electronic device according to claim 8, characterized in that the color adjustment model:
Figure CN104144332AC00031
(1) 其中X为所输入的上述第一色彩分量(a*)或上述第二色彩分量(b*),f(x)为上述第一色彩分量(a*)或上述第二色彩分量(b*)映射至0〜1范围间的色彩映射值,参数t与Y为控制参数,参数P与q为限制参数,而g(x)为将上述色彩映射值f(x)经上述色彩调整模型调整后的色彩调整值。 (1) wherein X is a color component of said first input (a *) or said second color component (b *), f (x) is a component of said first color (a *) or said second color components ( b *) is mapped to the color map value among 0~1 range, the control parameter t and Y is a parameter, the parameter P and q as limiting parameters, and g (x) of the above-described color map value f (x) said color adjusted color adjustment value after adjustment model.
11. 如权利要求10所述的电子装置,其特征是,其中上述这些控制参数t与Y符合0彡Y彡4与0. 99彡t彡1. 91,而上述这些限制参数p与q符合0〈p彡2与0〈q彡1。 11. The electronic device according to claim 10, characterized in that the control parameter t and the compliance Y Y San San 4 0 0.99 1.91 San San t, and said parameter p and q these limits conform 0 <p San 2 and 0 <q San 1.
12. 如权利要求8所述的电子装置,其特征是,其中上述图像处理装置通过上述色彩调整模型增强上述这些第二像素数据中的上述第一色彩分量(a*)与上述第二色彩分量(b*),以提升上述这些第二像素数据的色彩饱和度。 12. The electronic device according to claim 8, characterized in that the image processing apparatus of the first enhancement these second color component pixel data of the color adjustment model by (a *) and the second color component (b *), to enhance the color saturation of the second of these pixel data.
13. 如权利要求12所述的电子装置,其特征是,其中上述图像处理单元还包括肤色检测单元,上述图像处理单元对上述这些第一像素数据进行色彩空间转换,以取得上述图像于第二色彩空间中的多组第五像素数据,而上述肤色检测单元对上述这些第五像素数据进行肤色检测,以判断上述图像中是否具有呈肤色的肤色区域。 13. The electronic device according to claim 12, characterized in that the image processing means further comprises a skin color detecting means, the image processing unit each of the first pixel data color space conversion to the image to obtain a second color space fifth plurality of sets of pixel data, and said means for detecting skin color pixel data for these fifth color detection, to determine whether the image in the form of a skin color region.
14. 如权利要求13所述的电子装置,其特征是,其中上述第二色彩空间为HSV色彩空间,而每一上述这些第五像素数据包括色相分量(H)、饱和度分量(S)以及亮度分量(V)。 14. The electronic device according to claim 13, characterized in that the second color space is an HSV color space, and each of these components of the fifth pixel data includes a hue (H), the saturation component (S) and luminance component (V).
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