CN100589526C - Image picking system and method thereof - Google Patents

Image picking system and method thereof Download PDF

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CN100589526C
CN100589526C CN 200710004019 CN200710004019A CN100589526C CN 100589526 C CN100589526 C CN 100589526C CN 200710004019 CN200710004019 CN 200710004019 CN 200710004019 A CN200710004019 A CN 200710004019A CN 100589526 C CN100589526 C CN 100589526C
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image
liquid crystal
crystal panel
pickup system
image sensor
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CN 200710004019
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CN101227556A (en
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周宏隆
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华晶科技股份有限公司
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Abstract

An image pick-up system and the process control the transmissivity of each pixel in an optical element through utilizing the analysis of the darker pixel and brighter pixel in an image sensor, therebyincreasing the dynamic range of the image, presenting the details of the brighter portion and the darker portion. The image pick-up system comprises an optical element which defines a plurality of pixels with variable transmissivity, and is used to modulate the image which is received, at least a optical lens which is used to focus the image which is modulated, an image sensor which is used to transform the image which is focused into electric signals, a processing unit which outputs control signals as responding the electric signals which are outputted by the image sensor, and respectively controls the transmissivity of each pixel in the optical element, and a storage unit which couples with the processing unit to store the image data.

Description

图像拾取系统及其方法 The image pickup system and method

技术领域 FIELD

本发明涉及一种图像拾取系统及其方法,更详细地,涉及一种可控制光学元件中每一像素的透射率的图像拾取系统及其方法。 The present invention relates to an image pickup system and method, and more particularly, relates to an image controlling an optical transmissivity of each element in the pixel pickup system and method.

背景技术 Background technique

图像拾t系统在曝光时,图像传麟上所获得的像素会受至恍圈大小、 快门时间、以及场景亮度影响。 T The image pickup system during exposure image pixel will pass obtained by Lin suddenly turns to size, shutter time, and the brightness of the scene. 前二者对于所有像素而言都是相同的,然而后者却会因场景中各区域的明亮程度不同而不同。 The former two are the same for all the pixels, but the latter will vary depending on the brightness of the scene is different in each region. 但是若场景中不同区域的亮度差异过大,此称为高动态范围(动态范围指的是图像中拾取的光线范围,从较暗的阴影区域到明亮的高亮度区域),则易发生图像中某些区域过暗或过亮而造成细节的损失。 However, if the brightness difference between different regions of the scene is too large, referred to herein as a high dynamic range (dynamic range refers to an image pickup light range, from dark shadows to bright areas of high luminance region), the image is prone to some areas are too dark or too bright and cause loss of detail.

对于上述问题,现有常见的技术^g过后端软件一个像素一个像素地分析^像素周围的亮度变化,并机动地调整对比,以展现暗部与亮部的 For these problems, the prior art common client software ^ one pixel after analyzing g ^ luminance variation around the pixel, and adjust the contrast by motor, to exhibit a dark portion and the bright portion

信息。 information. 此类技术在图像拾取系统中以对比度加强(contrast enhancement),动态曝光修正(D-lighting)等不同名称出现。 Such techniques in the image pickup system to strengthen the contrast (contrast enhancement), dynamic exposure correction (D-lighting) and the like appear different names.

现有技术的缺点在于:相邻像素的对比度加强会因为不同的强度而造成视觉上不连续。 Disadvantages of the prior art in that: adjacent pixel contrast emphasis because different intensities resulting visual discontinuity. 再者,若原始«已经饱和或亮度值皆是零时,则此类技术便无法发挥作用。 Furthermore, if the original << saturated or brightness values ​​are all zero, then such technology will not work. 此问题主要是图像传感器在曝光过程中,未能依据场景中各区域的亮it^调整剤象素的曝光量。 This problem is an image sensor during exposure, failed by the bright areas of each scene it ^ Ji pixel exposure amount adjustment.

发明内容 SUMMARY

本发明的一个目的是提供一种图像拾取系统,利用其图像传感器中最暗及最亮点群的分析来控制光学元件中每一像素的透射率,进而提升图像的动态范围,展现出亮部与暗部的细节。 An object of the present invention is to provide an image pickup system, an image sensor using its darkest and the brightest point group analysis of controlling the optical transmittance of each pixel element and further enhance the dynamic range of the image, the bright portions show shadow detail.

本发明的另一目的是提供一种图像拾取方法,用于图像拾取系统中,该图像拾取系统包含光学元件,定义有多个可变透射率的像素,利用其图像传感器中最暗及最亮点群的分析来控制光学元件中每一像素的透射率,进而提升图像的动态范围,展现出亮部与暗部的细节。 Another object of the present invention is to provide an image pickup method for an image pickup system, the image pickup system includes an optical element, define a plurality of variable-transmissivity pixels, with which the image sensor and the highlight darkest cluster analysis to control the optical transmittance of each pixel element and further enhance the dynamic range of the image, showing the details of the bright portion and dark portion. 依本发明的一个方面,以上与其它的目的可通过提供下列图像拾取系统而实现。 Under this one aspect of the invention, the above can be achieved with other objects by providing the following image pickup system. 一种图像拾取系统,其包含:液晶面板,定义有多个可变透射率的像素,用以调制所接收的图像;至少一透镜,用以将该调制后的图像聚焦;图像传感器,用以将该聚焦后的图像转换成电信号;处理单元,因应该图像传感器所输出的电信号而输出控制信号, 以分别控制该液晶面板中每一像素的透射率;以及存储单元,与该处理单元相耦合,用以存储图像数据,其中该处理单元根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。 An image pickup system, comprising: a liquid crystal panel, there are defined a plurality of variable-transmissivity pixels, for the modulation of the received image; at least one lens for focusing the modulated image; an image sensor for converting the focused image into an electrical signal; and a processing unit, an electric signal to be output from the image sensor and outputs a control signal to control the transmittance of the liquid crystal panel for each pixel; and a storage unit, the processing unit coupled to store the image data, wherein the processing unit of the image sensor according to the darkest and the brightest point group analysis, and outputs the control signal. 于另一优选实施例中,该图像传感器包含多个电荷耦合元件(charge coupled device, CCD)。 In another preferred embodiment, the charge-coupled image sensor comprising a plurality of elements (charge coupled device, CCD). 于另一优选实施例中,该图像传感器包含多个互补金属氧化物半导体(complementary metal-oxide semiconductor, CMOS)。 In another preferred embodiment, the image sensor comprises a plurality of complementary metal oxide semiconductor (complementary metal-oxide semiconductor, CMOS). 于另一优选实施例中,该图像拾取系统是数码相机。 In another preferred embodiment, the digital camera image pickup system. 于另一优选实施例中, 该图像拾取系统是数字摄影机。 In another preferred embodiment, the image pickup system is a digital video camera. 于另一优选实施例中,该图像拾取系统是照相手机。 In another preferred embodiment, the image pickup system is a camera phone.

依本发明的另一方面,以上与其它的目的可通过提供下列图像拾 Under this aspect of the invention, the above and other objects by providing the following image pickup

取系统而实现。 Take the system is achieved. 一种图像拾取系统,包含:至少一透镜,用以将所接收的图像聚焦;液晶面板,定义有多个可变透射率的像素,用以调制该聚焦后的图像;图像传感器,用以将该调制后的图像转换成电信号; 处理单元,因应该图像传感器所输出的电信号而输出控制信号,以分别控制该液晶面板中每一像素的透射率;以及存储单元,与该处理单元相耦合,用以存储图像数据,其中该处理单元根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。 An image pickup system, comprising: at least one lens for focusing the received image; liquid crystal panel define a plurality of variable-transmissivity pixels, for modulating the focused image; an image sensor for the the modulator converts the image into an electrical signal; a processing unit, an electric signal to be output from the image sensor and outputs a control signal to control the transmittance of the liquid crystal panel for each pixel; and a storage unit, with the processing unit coupling, to store the image data, wherein the processing unit of the image sensor according to the darkest and the brightest point group analysis, and outputs the control signal. 于另一优选实施例中, 该图像传感器包含多个电荷耦合元件。 In another preferred embodiment, the charge-coupled image sensor comprising a plurality of elements. 于另一优选实施例中,该图像传感器包含多个互补金属氧化物半导体。 In another preferred embodiment, the image sensor comprises a plurality of complementary metal oxide semiconductor. 于另一优选实施例中,该图像拾取系统是数码相机。 In another preferred embodiment, the digital camera image pickup system. 于另一优选实施例中,该图像拾取系统是数字摄影机。 In another preferred embodiment, the image pickup system is a digital video camera. 于另一优选实施例中,该图像拾取系统是照相手机。 In another preferred embodiment, the image pickup system is a camera phone.

依本发明的又一方面,以上与其它的目的可通过提供下列图像拾取方法而实现。 Under this further aspect of the invention, the above can be achieved with other objects by providing the following image pickup method. 一种图像拾取方法,用于图像拾取系统中,该图像拾取系统包含液晶面板,定义有多个可变透射率的像素,包含下列步骤: An image pickup method for an image pickup system, the image pickup system comprises a liquid crystal panel, there are defined a plurality of variable-transmissivity pixels, comprising the steps of:

(a)接收目标物的第一图像,并以具有预设透射率的液晶面板来调制第 (A) receiving a first image of the object, and the liquid crystal panel has a predetermined transmittance to Modulation

一图像;(b)将该调制后的第一图像聚焦;(C)将该聚焦后的第一图像利用一图像传感器转换成第一电信号;(d)因应第一电信号,而输出—控制信号,以分别调整液晶面板中每一像素的透射率;(e浪收同一目标物的第二图像并以调整过透射率的液晶面板来调制第二图像;(f) 将该调制后的第二图像聚焦;(g)将该聚焦后的第二图像利用该图像传感器转换成第二电信号;以及(h)存储该第二电信号,其中步骤(d) 根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。于一优选实施例中,在步骤(d)与(e)之间,还包含:对该液晶面板中所有像素的透射率执行微调步骤。 An image; (b) a first image focusing after the modulation; (C) focusing the first image using the image sensor is converted into a first electrical signal; (d) in response to a first electrical signal, and outputs - after (f) of the modulated; a control signal to respectively adjust the transmittance of the liquid crystal panel for each pixel; (E wave receiving a second image of the same object and an adjusted transmittance of the liquid crystal panel to modulate the second image focusing the second image; (G) of the second image after the focusing by using an image sensor to convert the second electrical signal; and (h) storing the second electrical signal, wherein step (d) of the image sensor according to the darkest analysis and highlight group, and outputs the control signal in a preferred embodiment, between step (d) and (E), further comprising: performing the step of trimming the transmittance of the liquid crystal panel, all the pixels.

依本发明的再一方面,以上与其它的目的可通过提供下列图像拾取方法而实现。 Under this another aspect of the invention, the above can be achieved with other objects by providing the following image pickup method. 一种图像拾取方法,用于图像拾取系统中,该图像拾取系统包含液晶面板,定义有多个可变透射率的像素,包含下列步骤: (a)接收目标物的第一图像并将所接收的第一图像聚焦;(b)以具有预设透射率的液晶面板来调制该聚焦后的第一图像;(c)将该调制后的第一图像利用一图像传感器转换成第一电信号;(d)因应第一电信号, 而输出一控制信号,以分别调整液晶面板中每一像素的透射率;(e) 接收同一目标物的第二图像并将所接收的第二图像聚焦;(f)以调整过透射率的液晶面板来调制该聚焦后的第二图像;(g)将该调制后的第二图像利用该图像传感器转换成第二电信号;以及(h)存储该第二电信号,其中步骤(d)根据该图像传感器中最暗及最亮点群的分析, 而输出该控制信号。 An image pickup method for an image pickup system, the image pickup system comprises a liquid crystal panel, there are defined a plurality of variable-transmissivity pixels, comprising the steps of: (a) receiving a first image of the target object and received a first image focusing; a first image of (b) to the liquid crystal panel has a predetermined transmittance modulating the focusing; (c) a first modulated with the image after converting an electrical signal into a first image sensor; (D) in response to a first electrical signal, and outputs a control signal to respectively adjust the transmittance of the liquid crystal panel for each pixel; second image focus (e) receiving a second image of the same object and received; ( f) adjusted to the liquid crystal panel to modulate the transmittance of the second image after the focusing; a second image (g) of the modulation image sensor using a conversion into a second electrical signal; and (h) storing the second electrical signal from the image sensor darkest and brightest point group analysis wherein step (D), and outputs the control signal. 于一优选实施例中,在步骤(d)与(e)之间,还包含:对该液晶面板中所有像素的透射率执行微调步骤。 In one preferred embodiment, between step (d) and (E), further comprising: performing the step of trimming the transmittance of the liquid crystal panel, all the pixels.

附图说明 BRIEF DESCRIPTION

图1显示依本发明优选实施例的图像拾取系统10; 1 shows the preferred embodiment under this invention, the image pickup system 10;

图2显示依本发明另一优选实施例的图像拾取系统20; Under this invention, Figure 2 shows another preferred embodiment of the image pickup system 20;

图3显示依本发明优选实施例的图像拾取方法的流程; 3 shows a flow of an image pickup method of the preferred embodiment under this invention;

图4显示依本发明另一优选实施例的图像拾取方法的流程;图5显示光学元件中各像素的范例; The image pickup method under this process 4 shows another preferred embodiment of the invention; Figure 5 shows the optical element of each pixel sample;

图6显示光学元件中各像素的透射率的范例; 6 shows the example of the transmittance of the optical element in each pixel;

图7显示图像传感器所获取像素的亮度值的范例; Figure 7 shows the example of the luminance values ​​of the pixels acquired by the image sensor;

图8显示经调整后的光学元件中各像素的透射率的范例; Figure 8 shows exemplary optical elements adjusted in the transmittance of each pixel;

图9显示经微调后的光学元件中各像素的透射率的另一范例。 Figure 9 shows another example of the transmittance of the optical element after trimming of each pixel.

【主要元件符号说明】 10 图像拾取系统 The main element SIGNS LIST 10 image pickup system

20 图像拾取系统 The image pickup system 20

101 光学元件 The optical element 101

103 透镜 Lens 103

105 图像传感器 The image sensor 105

107 处理单元 The processing unit 107

109 存储单元 The storage unit 109

111 目标物图像 Object image 111

113 调制后的图像 Modulation image 113

115 聚焦后的图像 Focusing image 115

117 电信号 117 electrical signal

119 控制信号 119 control signals

201 透镜 201 lens

203 光学元件 The optical element 203

205 图像传感器 The image sensor 205

207 处理单元 The processing unit 207

209 存储单元 The storage unit 209

211 目标物图像213 聚焦后的图像 211 after the object image 213 focused image

215 调制后的图像 Modulation image 215

217 电信号 217 electrical signal

219 控制信号 219 control signals

S301-S409 步骤具体实施方式 Step S301-S409 DETAILED DESCRIPTION

为魏一步了解本发明上述的目的、功能、特点和优点,下文将配合 Wei further understanding of the above-described object, functions, features and advantages of the present invention will hereinafter be fitted

所附图式进一步说明本发明的tte实施例。 The accompanying drawings illustrate a further embodiment of the present invention tte.

图1显示依本发明的«实施例的图像拾取系统10。 1 shows an embodiment of an image pickup system 10 under this «invention. 该图像拾取系统10包括:光学元件101,定义有多个可,寸率的像素,用以调制所接收的图像;至少一透镜103,用以将该调制后的图像聚焦;图像传繊105, 用以将该聚焦后的图像转换成电信号;处理单元107,因应该图像传SH所输出的电信号而输出控制信号,以分别控制该光学元件中每一像素的邀寸率;以及存储单元109,与该处理单元107相耦合,用以存储图像,。 The image pickup system 10 comprises: an optical element 101, there are defined a plurality of, inch pixel rate for the modulation of the received image; at least one lens 103 for focusing an image after the modulation; Xian pass image 105, for converting the focused image into an electrical signal; processing unit 107, the image transfer due to the electric signal SH to be output and outputs a control signal for controlling the optical element are invited inch of each pixel; and a storage unit 109, and 107 coupled to the processing unit for storing the image. 于一雌实施例中,就学元件101为液晶面板。 Embodiment, the element 101 in a female school embodiment of a liquid crystal panel. 于另一«实施例中,该图像传感器105包含多个电荷耦合元辨charge coupled device, CCD)。 In another «embodiment, the CCD image sensor 105 includes a plurality of element resolution charge coupled device, CCD). 于另一优选实施例中,该图像传感器105包含多个互补金属氧化物半导体(complementary metal-oxide semiconductor, CMOS)。 In another preferred embodiment, the image sensor 105 comprising a plurality of complementary metal oxide semiconductor (complementary metal-oxide semiconductor, CMOS). 于另一tfc^实方但例中, 该图像拾取系统10是数码相机。 In another embodiment tfc ^ Jitsukata However, the image pickup system 10 is a digital camera. 于另一«实施例中,该图像拾取系统10 是数字gf》机。 In another «embodiment, the image pickup system 10 is a digital gf" machine. 于另一,实施例中,该图像拾取系统10是照相手机。 In another, embodiment, the image pickup system 10 is a camera phone.

于图1中,信号符号111标目标物的图像;信号符号113表恭圣光学元件101调制的图傲信号符号115 ^^3tlt 103聚焦的图像;信号符号117 «^图像传« 105转换的电信号;信号符号119表示由处理单元107输出的控制信号。 In FIG. 1, an image signal symbol labeled 111 target object; FIG proud signal sign signal symbol table 113 of the optical element 101 St. Christine 115 ^^ 3tlt 103 modulated focused image; signal symbols 117 «image transfer ^« electrical conversion 105 signal; symbol 119 denotes a control signal output by the processing unit 107.

图3显示根据战图像拾取錢10的图像拾取方法的流程。 3 shows an image pickup method of picking up the money 10 according to the image battle process. 于步骤301 中,光学元件101接收目标物的图像并调制所接收的图像,更具体而言, 亦即禾,光学元件101中每一像素预设的鄉率来调帝鹏像。 Receiving the object in the step, the optical modulation element and the image 101301 of the received image, and more specifically, Wo i.e., 101 pixels each optical element to adjust the predetermined rate Township Tai Peng like. 于步骤302 中,以邀竟103将该调审脂的图像聚焦至图像传離105。 In step 302, the image actually invite 103 to adjust the focus to the image of the trial fat mass from 105. 于步骤303中, 图像传離105将该聚焦后的图像转换成电信号荆专送至处理单元107。 In step 303, the image transfer from the image into an electric signal Jing 105 after the focusing spot to the processing unit 107. 于步骤304中,处理单元107因应该电信号,而输出控制信号,以分别调整光学元件101中每一像素的激率。 In step 304, the processing unit 107 should be due to an electric signal and outputs control signals to adjust the respective laser optical element 101 of each pixel. 更具体而言,可根据j顿需求来设计3»率与亮度值的规则。 More specifically, the design rules may be 3 »ratio and luminance values ​​in accordance with the needs of Dayton j. 鄉採说,图5显示光学元件101中的像素的范例图,为使本发明浅显易懂,图中仅以四乘四的格式来说明,且以矩阵表示ti^^各像素,例如像素A(0,0)、像素A(1,0)等。 Said mining Township, FIG. 5 shows exemplary optical element 101 pixels in order to make the present invention easy to understand, the figures only a four by four format will be described, and represented in a matrix ti ^^ each pixel, such as pixel A (0,0), the pixel A (1,0) and the like. 如图6所示,光学元件101中每一像素的邀寸率均预设为50%,经光学元件101以]J:btl寸率调制目标物图像后,再经由透镜聚焦于图像传感器105。 6, the optical element 101 of each pixel invited inch preset rate is 50%, the 101] optical element J: modulated object image btl inch rate, and then focused on the image sensor through the lens 105. 举例来说,图像传感 For example, the image sensing

器105所接收的图像的每一像素的亮度值如图7所示,其中亮度值0表示最暗,亮度值255表示最亮。 105 luminance of each pixel of the received image values ​​shown in Figure 7, where 0 indicates the darkest brightness value, brightness value of 255 indicates the brightest. 则可敏处理单元107输出控制信号119以将较大亮度傲例如255)的像素所X寸应的光学元件101的像敦例如A(O,O)、 A(O,l)、 A(1,0》调整成具有较小的邀才煞例如10%),并将较小離值(例如O)的像素所对应的光学元件101的像素(例如A(0,3)、 A(1,3)、 A(2,3)、 A(3,2)、 A(3,3》调整成具有默的邀f與例如90X),如图8所示。于一雌实施例 The processing unit 107 may be sensitive outputs a control signal 119 to a larger luminance proud of the optical element 255, for example) of the pixel 101 corresponding to the X-inch image, for example, London A (O, O), A (O, l), A (1 , 0 "invitation adjusted to have only a small evil e.g. 10%), (a pixel (e.g., a (0,3 optical element, for example, O) of the corresponding pixel 101) and from the smaller value, a (1, 3), a (2,3), a (3,2), a (3,3 "silent adjusted to have the invitation f e.g. 90X), shown in Figure 8. in one embodiment, estrogen

中,M率与亮度it^线性关系。 , M is the brightness of it ^ linear relationship. 于另一im实施例中,邀寸率与亮度值 Im In another embodiment, the rate of luminance values ​​invited inch

成非线性关系。 Into a non-linear relationship. 应注意的是,本发明的精神在于利用图像传感器中较暗及较亮像素的分析来控制光学元件中每一像素的邈寸率,进而提升图像的动态范围,展现出亮部与暗部的细节,而调整像素的邀寸率的算法可根据不同JCT需求来作不同设计,本发明并不限定于,的算法。 It should be noted that the spirit of the present invention is to utilize the image sensor pixels darker and lighter controlled optical element analysis Miao inch of each pixel, thereby improving the dynamic range of the image, showing the details of the bright portion and dark portion , adjusted pixel algorithm invited inch according to the different rates JCT demand for different designs, the present invention is not limited to, algorithms.

于步骤305中,光学元件101接收同一目标物的图像并以调整过的透射率来调制所接收的图像。 In step 305, optical element 101 receives images of the same object and an adjusted transmittance modulating the received image. 于步骤306中,以纖103将该调制后的图像聚焦,在此情形下,由于先前较亮的像素所对应的光学元件像素被调整成较小的邀寸率,且先前较暗的像素所对应的光学元件像素被调整成较大的邀寸率,古处万得的图像具有駄的动态范围。 In step 306, the image fiber 103 after focusing the modulated, in this case, since the optical element lighter pixel of the previous pixel is adjusted corresponding to a smaller rate invited inch, and the darker pixels previously the optical element corresponding to a pixel is adjusted to be invited inch larger rate, the old Wonder Dai image having a dynamic range. 于步骤307中,将该聚焦后的图像利用图像传繊105转换成电信号。 In step 307, the converted image using the focused image transfer Xian 105 into an electrical signal. 于步骤308中,存储该电信号于存储单元109。 In step 308, the electrical signal is stored in the storage unit 109.

于另一«实施例中,在步骤S304与S305之间还包含:对i統学元件中所有像素的邀寸率执行微调步骤S309。 In another «embodiment, at step S304 between S305 and further comprising: trimming step S309 to perform optical element in the system i invited inch of all pixels. 具体而言,步骤S304后,像素的邀才率被调皿如图8所示,而经本发明的微调步骤S309后,经微调的各像素的,率如图9所示。 Specifically, after step S304, the invitation is adjusted only dish ratio of a pixel shown in FIG. 8, and fine-tuned after the step S309 of the present invention, by trimming of each pixel, as shown in FIG rate. 图9中的3«率由以下方5^斥得:将A(O,O)、 A(O,l)、 A(l,O)、 A(l,l)的邀牙率加总后除以4得到新的八(0,0)的«1"辨25%); 将A(O,O)、 A(O,l)、 A(0,2)、 A(l,O)、 A(l,l)、 A(l^)的翻率加总后除以6 得到新的A(0,l)的邀寸萌36Q/。);将A(O,l)、 A(0,2)、 A(0,3)、 A(l,l)、 A(U)、 A(l,3)的邀寸率加总后除以6得到新的A(0,2)的邀寸與63。/。);将A(0,2)、 A(0,3)、A(l,2)、A(l,3)的3fl寸率加总后除以4得到新的A(0,3)的纖萌75。/。); 将A(O,O)、 A(O,l)、 A(l,O)、 A(l,l)、 A(2,0)、 A(2,l)的透射率加总后除以6得到新的A(l,0)的邀寸與27。/。);将A(O,O)、 A(O,l)、 A(0,2)、 A(l,O)、 A(l,l)、 A(l,2)、 A(2,0)、 A(2,l)、 A(2,2)的邈t率加总后除以9得到新的A(l,l)的透射率(39%);将A(O,l)、 A(0,2)、 A(0,3)、 A(l,l)、 A(l,2)、 A(l,3)、 A(2,l)、 A(2,2)、 A(2,3)的3tM率加总后除以9得到新的A(l,2)的邀寸與63n/。);同理得到新 3 «rate less side in FIG. 5 ^ 9 repellent obtained: the A (O, O), A (O, l), A (l, O), A (l, l) of the teeth of the summed invited by 4 to get a new eight (0,0) «1" Differentiation 25%); the a (O, O), a (O, l), a (0,2), a (l, O), a (l, l), a (l ^) of the summed turn rate divided by 6 to give a new a (0, l) inch invitation Meng 36Q /);. the a (O, l), a (0 , 2), a (0,3), a (l, l), a (U), a (l, 3) of the summed invitation inch divided by 6 to obtain a new a (0,2) invitation and 63./ inch);. the a (0,2), a (0,3), a (l, 2), a (l, 3) of the summed 3fl inch rate obtained by dividing the new a 4 (0,3) of the fiber sprouting 75./); the a (O, O), a (O, l), a (l, O), a (l, l), a (2,0), a (2, l) is divided by the transmittance of the summed to give a new 6 a (l, 0) and 27./ invitation inch);. the a (O, O), a (O, l), a (0,2), a (l, O), a (l, l), a (l, 2), a (2,0), a (2, l), a (2,2) of t Miao 9 obtained by dividing the summed rate of the new a (l, l) transmittance (39%); the a (O, l), a (0,2), a (0,3), a (l, l), a (l, 2), a (l, 3), a (2, l), a (2,2), a (2,3) divided by the summed rate of 9 3tM obtained new a (l, 2) with the invitation inch 63n /);. Similarly get new 的A(l,3)的邀寸萌77。/。);新的A(2,0)的邀寸與33。/。);新的A(2,1)的邀寸^(48%);新的A(2,2)的邀才與70。/。);新的A(2,3)的邈寸萌83。/。);新的A(3,0)的邀才與3(P/o);新的A(3,l)的邀寸與47n/。);新的A(3,2)的邀寸率(67%);新的A(3,3)的邀t與83y。)。应注意的是,本发明的精神在于Mit匕微调步骤S309,可得到较平滑的变化,如此亮部与暗部细节可有效显王胆不会有视觉上的剧烈变化。 The A (l, 3) Meng 77./ invitation inch);. The new A (2,0) and 33./ invitation inch);. The new A (2,1) Invitation inch ^ (48% ); the new a (2,2) and 70./ invitation only); the new a (2,3) of the Miao Meng 83./ inch); the new a (3,0) and invitation only 3 (P / o); new a (3, l) the invitation inch 47n /);. the new a (3,2) inch invitation rate (67%); new a (3,3) of t invited and 83Y.). It should be noted that the spirit of the present invention is Mit dagger trimming step S309, the smoother variation is obtained, so the bright portion and dark portion guts king significant details may not be effective dramatic visual changes.

图2显示依本发明的另一«实施例的图像拾取系统20的方块示意图。 Another display under this invention. FIG. 2 «embodiment of an image pickup system block 20 of FIG. 该图像拾縣统20与图1的图像拾縣统10的差另赃于:调制与聚焦的先后)1»。 The image pickup system County difference image 20 of FIG. 1 County pickup stolen in another system 10: the focus successively modulated) 1 ». 该图像拾取系统20包括:至少一3H竟201,用以将所接收的图像聚焦;光学元件203,定义有多个可变3tl才率的像素,用以调制该聚焦后的图像;图像传感器205,用以将该调制后的图像转换成电信号;处理单元207,因应该图像传繊所输出的电信号而输出控制信号,以分别控制该光学元件中每一像素的邀t率;以及存储单元209,与该处理单元207相耦合,用以存储图像«。 The image pickup system 20 comprising: at least one 3H actually 201 for focusing the received image; an optical element 203, a plurality of pixels defined only 3tl variable rate, for modulating the focused image; an image sensor 205 for this modulated image into an electrical signal; processing unit 207, due to an electric signal to be outputted image transfer Xian outputs control signals to control the optical element of the invited t of each pixel; and storing unit 209, the processing unit 207 is coupled to store the image «. 于一«实施例中,该光学元件203为液晶面板。 In a «embodiment, the optical element 203 is a liquid crystal panel. 于另一雌实施例中,该图像传繊205包含多个电荷耦合元件。 In another embodiment the female embodiment, the image transfer Xian 205 includes a plurality of charge-coupled elements. 于另一雌实施例中,该图像传麟205包含多个互补金属氧化物半导体。 In another embodiment, Estrogen, which includes a plurality of image transfer Lin 205 complementary metal oxide semiconductor. 于另一ft^实施例中,该图像拾取系统20是fr码相机。 Ft ^ In another embodiment, the image pickup system 20 is fr cameras. 于另一,实施例中,该图像拾取系统20是数字摄影机。 In another, embodiment, the image pickup system 20 is a digital camera. 于另一«实施例中,该图像拾取系统20是照相手机。 In another «embodiment, the image pickup system 20 is a camera phone.

于图2中,信号符号211标目标物的图像;信号符号213 «^缝镜203聚焦的图像;信号符号215 ^t圣光学元件201调制的图像;信号符号217 ^M图像传自205转换的电信号;信号符号219 »由处理单元207输出的控制信号。 In FIG. 2, the image signal symbol 211 labeled target substance; signal symbols 213 «image ^ slit mirror 203 focusing; signal symbols 215 ^ t St. optical element 201 modulated image; signal symbols 217 ^ M image came from 205 converted electrical signal; signal symbol 219 »control signal output by the processing unit 207.

图4显示根据±3悉图像拾取装置20的图像拾取方法的流程示意图。 4 shows a schematic flow chart of ± 3 noted image pickup method for an image pickup apparatus 20. 于步骤401中,纖201接收目标物的图像并将所接收的图像聚焦至光学元件203。 In step 401, the web 201 receives the object image and the received image 203 focused onto the optical element. 于步骤402中,以光学元件203调制该聚焦后的图像,更具体而言,亦即禾佣光学元件203中每一像m?页设的邀寸率来调制图像。 In step 402, the image after the focusing optical modulation element 203, and more specifically, 203 of each FDH i.e. Wo optical element as m? P provided inch invitation rate modulation image. 于步骤403中,图像传自205将该调制后的图像转换成电信号^M专送至处理单元207。 In step 403, the image transmitted from the image into an electric signal after the modulation ^ M 205 to the processing unit 207 specifically. 于步骤404中,处理单元207因应该电信号,而输出控制信号,以分别调整光学元件203中每一像素的邀寸率。 In step 404, the processing unit 207 should be due to an electric signal and outputs a control signal to respectively adjust the rate of 203 inches invite each pixel in the optical element. 更具体而言,可根据^ffl需求来设计iSI寸率与亮度值的规则,由于此部分已于前文中详细描述,故于此不再赘述。 More specifically, according to design requirements ^ ffl-inch iSI rules of luminance values, since this section was previously described in detail, it is omitted herein.

于步骤405中,3tl竟201接收同一目标物的图像荆每所接收的图像聚焦至光学元件203。 In step 405, 3tl actually Jing 201 receives the image of the same object each of the received image to the focusing optical element 203. 于步骤406中,光学元件203以调整过的邀寸率来调制经聚焦的图像,在此情形下,由于先前较亮的像素所对应的光学元件像素被调整成较小的透射率,且先前较暗的像素所对应的光学元件像素被调整^^:的邈t率,古Mf得的图像具撤大的动态范围。 In step 406, the optical element 203 in the adjusted rate modulation inch invited the focused image, in this case, the optical element due to a previous lighter pixels corresponding to pixels is adjusted to a smaller transmittance, and previously the optical elements of pixels corresponding to the darker pixels are adjusted ^^: t rate of Miao, ancient Mf resulting image with a large dynamic range withdrawal. 于步骤407中,将该调帝U后的图像利用图像传繊205转J滅电信号。 In step 407, the image transmitted by the image after the adjustment Xian Di U 205 turn off electrical J. 于步骤408中,存储该电信号于存储单元209。 In step 408, the electrical signal is stored in the storage unit 209.

于另一,实施例中,在步骤S404与S405之间还包含:对该光学元件中所有像素的邀寸率执行微调步骤S409。 In another, embodiment, at step S404 between S405 and further comprising: performing the trimming step S409 invited inch optical element of all the pixels. 由于此部分已于前文中详细描述,故于此不再魏。 Because this section was described in detail hereinbefore, Wei omitted herein.

虽然本发明已利用上述的«实施例予以详细公开,然其并非用以限定本发明,本领域技术人员在不脱离本发明的衞申和范围内,可进行各禾中 While the invention has been disclosed in detail using the above «embodiments, they are not intended to limit the invention, those skilled in the art without departing from the satellite application and scope of the present invention may be made in various Wo

更动及修改,因此本发明的傲户范围当以后附权利要求所界定的为准。 Modifier and modification, and therefore the scope of the present invention household proud When appended claims and their equivalents.

Claims (10)

1.一种图像拾取系统,包含: 液晶面板,定义有多个可变透射率的像素,用以调制所接收的图像; 至少一透镜,用以将该调制后的图像聚焦; 图像传感器,用以将该聚焦后的图像转换成电信号; 处理单元,因应该图像传感器所输出的电信号而输出控制信号,以分别控制该液晶面板中每一像素的透射率;以及存储单元,与该处理单元相耦合,用以存储图像数据, 其中该处理单元根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。 An image pickup system, comprising: a liquid crystal panel, there are defined a plurality of variable-transmissivity pixels, for the modulation of the received image; at least one lens for focusing the modulated image; an image sensor, with the focus in the image into an electrical signal; and a processing unit, an electric signal to be output from the image sensor and outputs a control signal to control the transmittance of the liquid crystal panel for each pixel; and a storage unit, and the process means coupled to store the image data, wherein the processing unit of the image sensor according to the darkest and the brightest point group analysis, and outputs the control signal.
2. 如权利要求1所述的图像拾取系统,其中该图像传感器包含多个电荷耦合元件或多个互补金属氧化物半导体。 The image pickup system according to claim 1, wherein the image sensor comprises a CCD element or a plurality of complementary metal oxide semiconductor.
3. 如权利要求1所述的图像拾取系统,其中该图像拾取系统是数码相机、数字摄影机、或照相手机中的一种。 1 The image pickup system as claimed in claim, wherein the image pickup system is a digital camera, a digital video camera, or a camera phone.
4. 一种图像拾取系统,包含: 至少一透镜,用以将所接收的图像聚焦;液晶面板,定义有多个可变透射率的像素,用以调制该聚焦后的图像;图像传感器,用以将该调制后的图像转换成电信号;处理单元,因应该图像传感器所输出的电信号而输出控制信号,以分别控制该液晶面板中每一像素的透射率;以及存储单元,与该处理单元相耦合,用以存储图像数据, 其中该处理单元根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。 An image pickup system, comprising: at least one lens for focusing the received image; liquid crystal panel define a plurality of variable-transmissivity pixels, for modulating the focused image; an image sensor, with in this modulated image into an electrical signal; and a processing unit, an electric signal to be output from the image sensor and outputs a control signal to control the transmittance of the liquid crystal panel for each pixel; and a storage unit, and the process means coupled to store the image data, wherein the processing unit of the image sensor according to the darkest and the brightest point group analysis, and outputs the control signal.
5. 如权利要求4所述的图像拾取系统,其中该图像传感器包含多个电荷耦合元件或多个互补金属氧化物半导体。 The image pickup system according to claim 4, wherein the image sensor comprises a CCD element or a plurality of complementary metal oxide semiconductor.
6. 如权利要求4所述的图像拾取系统,其中该图像拾取系统是数码相机、数字摄影机、或照相手机中的一种。 6. The image pickup system according to claim 4, wherein the image pickup system is a digital camera, a digital video camera, or a camera phone.
7. —种图像拾取方法,用于图像拾取系统中,该图像拾取系统包含液晶面板,定义有多个可变透射率的像素,包含下列步骤:(a) 接收目标物的第一图像并以具有预设透射率的液晶面板来调制第一图像;(b) 将该调制后的第一图像聚焦;(c) 将该聚焦后的第一图像利用图像传感器转换成第一电信号;(d) 因应第一电信号,而输出控制信号,以分别调整液晶面板中每一像素的透射率;(e展收同一目标物的第二图像,并以调整过透射率的液晶面板来调制第二图像;(f) 将该调制后的第二图像聚焦;(g) 将该聚焦后的第二图像利用该图像传感器转换成第二电信号;以及(h) 存储该第二电信号,其中步骤(d)根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。 7. - kinds of image pickup method for an image pickup system, the image pickup system comprises a liquid crystal panel, there are defined a plurality of variable-transmissivity pixels, comprising the steps of: (a) receiving a first image of the object and to the liquid crystal panel has a predetermined transmittance modulating a first image; a first image focusing after (b) the modulation; (c) converting the first image using the image sensor a first electrical signal to the focus; (D ) in response to a first electrical signal, and outputs a control signal to respectively adjust the transmittance of the liquid crystal panel for each pixel; (E folding and unfolding the second image of the same target object, and adjusted to the transmittance of the second liquid crystal panel to modulate image; (f) after the second image focus modulation; (G) of the second image after the focusing by using an image sensor to convert the second electrical signal; and (h) storing the second electrical signal, wherein the step of (d) to the image sensor darkest and the brightest point group analysis, and outputs the control signal.
8. 如权利要求7所述的方法,在步骤(d)与(e)之间,还包含:对该液晶面板中所有像素的透射率执行微调步骤。 8. The method according to claim 7, between step (d) and (E), further comprising: performing the step of trimming the transmittance of the liquid crystal panel, all the pixels.
9. 一种图像拾取方法,用于图像拾取系统中,该图像拾取系统包含液晶面板,定义有多个可变透射率的像素,包含下列步骤:(a) 接收目标物的第一图像并将所接收的第一图像聚焦;(b) 以具有预设透射率的液晶面板来调制该聚焦后的第一图像;(C)将该调制后的第一图像利用图像传感器转换成第一电信号;(d) 因应第一电信号,而输出控制信号,以分别调整液晶面板中每一像素的透射率;(e) 接收同一目标物的第二图像并将所接收的第二图像聚焦;(f) 以调整过透射率的液晶面板来调制该聚焦后的第二图像;(g) 将该调制后的第二图像利用该图像传感器转换成第二电信号;以及(h) 存储该第二电信号,其中步骤(d)根据该图像传感器中最暗及最亮点群的分析,而输出该控制信号。 An image pickup method for an image pickup system, the image pickup system comprises a liquid crystal panel, there are defined a plurality of variable-transmissivity pixels, comprising the steps of: (a) receiving a first image of the object and the first focus of the received image; (b) to the liquid crystal panel has a predetermined transmittance to the modulation of the first image focusing; after a first image using an image sensor (C) of the modulated electrical signal into a first ; (d) in response to a first electrical signal, and outputs a control signal to respectively adjust the transmittance of the liquid crystal panel for each pixel; (e) receiving a second image of the same object and received a second image focusing; ( f) adjusted to the liquid crystal panel to modulate the transmittance of the second image after the focusing; a second image (g) of the modulation image sensor using a conversion into a second electrical signal; and (h) storing the second electrical signal from the image sensor darkest and brightest point group analysis wherein step (D), and outputs the control signal.
10.如权利要求9所述的方法,在步骤(d)与(e)之间,还包含:对该液晶面板中所有像素的透射率执行微调步骤。 10. The method as claimed in claim 9, between step (d) and (E), further comprising: performing the step of trimming the transmittance of the liquid crystal panel, all the pixels.
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CN1224175A (en) 1998-01-23 1999-07-28 富士通株式会社 Tunable optical filter
US6344935B1 (en) 1999-03-08 2002-02-05 Asahi Kogaku Kogyo Kabushiki Kaisha Optical system of optical pick-up

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