CN1118181C - Digital camera - Google Patents

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CN1118181C
CN1118181C CN 98119738 CN98119738A CN1118181C CN 1118181 C CN1118181 C CN 1118181C CN 98119738 CN98119738 CN 98119738 CN 98119738 A CN98119738 A CN 98119738A CN 1118181 C CN1118181 C CN 1118181C
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white balance
digital camera
means
color
awb
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CN 98119738
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CN1214591A (en
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青山光滋
白石贤二
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株式会社理光
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Abstract

本发明涉及设有自动白平衡机能的数字式照相机,照相机(100)的CCD(103)将被照体光变换成电信号,A/D变换器(106)将该彩色信号变换成数字彩色信号输出,IPP(107)输出与上述信号各色成分亮度数据相对应的AWB评价值,CPU(121)参照存储器(130)中各照明条件下的合适增益值,计算与AWB评价值对应的合适增益值,在白平衡调整部设定合适增益进行AWB调整,即使光源的色温变化也能合适地再现白色。 The present invention relates to a digital camera provided with an automatic white balance function, CCD (103) of the camera (100) to be converted illuminant light into an electric signal, A / D converter (106) converting the color signals into a digital color signal AWB evaluation value output, IPP (107) with said output signal of each color component of luminance data corresponding to, CPU (121) a reference memory (130) in the appropriate gain value at each lighting conditions, calculation and AWB evaluation values ​​corresponding to the appropriate gain value , set an appropriate gain in the white balance adjustment AWB adjustment unit, even when the color temperature variation of the light source can suitably reproduce white.

Description

数字式照相机 Digital camera

技术领域 FIELD

本发明涉及数字式照相机,具体地说,涉及设有自动白平衡(Auto WhiteBalaNce,以下简记为AWB)机能的数字式照相机。 The present invention relates to a digital camera, and more particularly with automatic white balance (Auto WhiteBalaNce, hereinafter referred to as AWB) function of the digital camera.

背景技术 Background technique

以往,在数字式照相机中,为了获得高质量彩色图像,需要调整白平衡。 Conventionally, in the digital camera in order to obtain high quality color images, it is necessary to adjust the white balance. 若该白平衡崩溃的话,则当对白色被照体进行摄影时,其摄影图像会带上颜色,不仅如此,当对一般被照体进行摄影时,色再现性也差,难以得到高质量的再现图像。 If the collapse of the white balance, when the body is illuminated white photography, which will bring the color photographic image, not only that, when illuminated body general photography, color reproducibility is also poor, it is difficult to obtain high-quality reproduced image.

若光源色温变化,白平衡就变化,所以,每当拍摄白色(或无彩色)被照体时,必须将作为数字式照相机摄影信号输出的三原色信号R,G,B的输出比调整为1∶1∶1。 If the color temperature changes, white balance will change, so, whenever shooting a white (or achromatic) of the illuminated body, the output must be a digital camera as a photograph signal of three primary color signals R, G, B was adjusted to 1: 1:1. 这叫白平衡调整,这种调整一般通过调整设在各色信号的传送线路上的可变增益电路进行。 Variable gain circuit called white balance adjustment, this adjustment typically provided by adjusting the color signals on the transmission line is performed.

但是,在以往的数字式照相机中,存在光源温度一变化就不能正确地再现白色的问题。 However, in the conventional digital camera, there is a change in the temperature of the light source can not be correctly reproduced white problem.

发明内容 SUMMARY

本发明就是鉴于上述先有技术所存在的问题而提出来的,其目的在于,提供一种即使光源色温变化也能正确地再现白色的数字式照相机。 The present invention in view of the above-described prior art problems and proposed, and its object is to provide a light source even if the color temperature variation can be correctly reproduced white digital camera.

为了实现上述目的,本发明提出一种数字式照相机,设有将通过光学系统的被照体光变换成电信号作为彩色图像信号输出的摄像元件、将上述彩色图像信号作A/D变换作为数字彩色图像信号输出的A/D变换装置;其特征在于,还设有:白检测范围设定装置,用于设定作为白平衡调整对象的色温范围;AWB评价装置,对于上述数字彩色图像信号的各色成分(RGB)输出与该各色成份的亮度数据相应的AWB评价值;AWB调整装置,用于调整上述数字彩色图像信号中至少二种色的增益;存储在若干种照明条件下的合适增益值的存储装置;AWB控制装置,参照存储在上述存储装置中的合适增益值,在由上述白检测范围设定装置设定的色温范围内,计算与从上述AWB评价装置输出的AWB评价值对应的合适增益值,设定上述AWB调整装置的增益。 To achieve the above object, the present invention provides a digital camera, the light is provided by being converted into an electrical signal according to the optical system body as a color image pickup element output signal, the color image signal for the A / D conversion as a digital the color image signal output from the a / D converting means; wherein, further provided with: white detection range setting means for setting a white balance adjustment target color temperature range; the AWB evaluation means for the digital color image signal each color component (RGB) the color component outputs luminance data corresponding AWB evaluation value; AWB adjustment means for adjusting the digital color image signal gain of at least two colors; suitable gain value stored at several lighting conditions storage means; AWB control means, with reference to the appropriate gain value stored in the storage means, within the white detection range set by the color temperature range setting means, and AWB evaluation values ​​calculated corresponding to the above-described AWB evaluation means from the output of suitable gain value, adjusting means to set the gain of the AWB.

为了实现上述目的,本发明还提出另一种数字式照相机,设有将通过光学系统的被照体光变换成电信号作为彩色图像信号输出的摄像元件、将上述彩色图像信号作A/D变换作为数字彩色图像信号输出的A/D变换装置;其特征在于,还设有:白检测范围设定装置,用于设定作为白平衡调整对象的色温范围;检测亮度范围设定装置,用于设定AWB评价装置检测的亮度范围;AWB评价装置,在上述检测亮度范围设定装置设定的亮度范围内,输出与上述数字彩色图像信号的各色成分(RGB)的亮度数据对应的AWB评价值;AWB调整装置,用于调整上述数字彩色图像信号中至少二种色的增益;存储在若干种照明条件下的合适增益值的存储装置;AWB控制装置,参照存储在上述存储装置中的合适增益值,在由上述白检测范围设定装置设定的色温范围内,计算与从上述AWB评价装置输 To achieve the above object, the present invention further provides another digital camera, with the light into an electrical signal by the optical system of the photographic material as a color image pickup element output signal, the color image signal for the A / D conversion a digital color image signal as the output of the a / D converting means; wherein, further provided with: white detection range setting means for setting a white balance adjustment, color temperature range for the object; luminance detection range setting means for luminance range setting means for detecting the AWB evaluation; AWB evaluation means for setting luminance range setting means, and outputs the digital color image signal of each color component (RGB) corresponding to the luminance data AWB evaluation value of the detected luminance range ; AWB adjustment means for adjusting the digital color image signal gain of at least two colors; appropriate gain value storage means stores at several lighting conditions; appropriate AWB gain control means for referring to stored in the storage means value within the white detection range set by the color temperature range setting means, and calculating from said output means AWB evaluation 的AWB评价值对应的合适增益值,设定上述AWB调整装置的增益。 Suitable gain values ​​corresponding to the AWB evaluation value, setting the gain of the AWB adjustment means.

按照本发明的数字式照相机,即使光源的色温有变化,也能正确地再现白色。 The digital camera according to the present invention, even if the color temperature of the light source changes, the white can be reproduced correctly. 按照本发明另一种型式的数字式照相机,除了上述效果之外,还能缩短运算时间。 According to another version of the present invention, a digital camera, in addition to the above effects, but also shorten the calculation time.

附图说明 BRIEF DESCRIPTION

图1是本发明实施例涉及的数字式照相机的构成图;图2表示图1的IPP的具体构成一例;图3是本发明实施例涉及的数字式照相机调整装置的外观构成图;图4是本发明实施例涉及的数字式照相机调整系统构成图;图5表示图3的计算机构成图;图6表示AWB调整处理顺序的流程图;图7是“表示菜单”图;图8是“滤光片选择菜单”图。 FIG. 1 is a block diagram of the digital camera according to an embodiment of the present invention; the IPP in particular FIG. 2 shows a configuration of one case; FIG. 3 is an external digital camera control device according to an embodiment of the present invention, configuration; Figure 4 is a adjusting the digital camera system according to the present invention relates to a configuration of the embodiment; Figure 5 shows a configuration diagram of the computer of FIG. 3; FIG. 6 shows a flowchart of the AWB adjustment processing procedure; FIG. 7 is a "menu showing"; Figure 8 is a "filter chip select menu "FIG.

具体实施方式 Detailed ways

下面参照附图,详细说明本发明涉及的数字式照相机的合适实施例。 Suitable examples of the digital camera according to the present invention will be described in detail below with reference to the drawings.

本实施例中涉及的数字式照相机设有AWB调整机能,其中央处理器(CeNtral ProcessiNg UNit,以下简记为CPU)作为AWB控制装置根据从图像信息预处理部(Image Pre-Processor,以下简记为IPP)的AWB调整值·白提取设定电路(AWB评价装置)输出的AWB评价值,参照调整工序中已存入瞬间存储器(flash memory)中的各照明条件下的合适增益值,计算在设定的色温范围内对应的合适增益值,在IPP的白平衡调整部(AWB调整装置)设定上述算得的合适增益值,进行AWB控制。 Digital camera according to embodiments of the present embodiment is provided with AWB adjustment mechanism, which is a central processing unit (CeNtral ProcessiNg UNit, hereinafter abbreviated as CPU) as an AWB control apparatus in accordance with the image information from the pre-processing section (Image Pre-Processor, hereinafter referred AWB evaluation value extracting circuit outputs a set (AWB evaluation apparatus) as IPP) AWB adjustment values ​​of the white-reference adjustment step gain value has been stored in the appropriate moment memory (flash memory) in each of the lighting conditions, the calculated suitable gain values ​​corresponding to the color temperature range is set, setting the calculated gain values ​​appropriate white balance adjustment section IPP (AWB adjustment means) performs AWB control. 另外,数字式照相机调整装置根据各照明条件下从数字式照相机的IPP输出的AWB评价值,计算对应的合适增益。 Further, the digital camera adjusting means based on the evaluation value output from the IPP digital camera under various lighting conditions of the AWB, calculate the corresponding appropriate gain. 该合适增益被写入数字式照相机的瞬间存储器中。 The appropriate gain is instantaneously written to the memory in the digital camera. 在本说明书中,所谓数字式照相机调整系统是指包含上述数字式照相机和数字式照相机调整装置的系统。 In the present specification, the digital camera adjustment system means a system including the digital camera and a digital camera adjustment device.

先就本实施例的数字式照相机进行说明。 First will be described a digital camera according to the present embodiment.

图1是本发明实施例涉及的数字式照相机构成图,在该图中,100表示数字式照相机,数字式照相机100由透镜101、包含自动调焦等的机械机构102、电荷藕合器件(Charge-Coupled Device,以下简记为CCD)103、相关双重取样(Correlate Dual SampliNg,以下简记为CDS)电路104、可变增益放大器(AGC放大器)105、A/D变换器106、IPP107、离散余弦变换器(Discrete CosiNe TraNsform,以下简记为DCT)108、编码器(HuffmaNENcoder/Decoder)109、存储卡控制器(Memory Card CoNtroller,以下简记为MCC)110、RAM(内部存储器)111、PC卡接口112、CPU121、显示部122、操作部123、马达驱动器125、控制信号产生(SG)部126、闪光灯127、电池128、DC-DC转换器、瞬间存储器130构成。 FIG 1 is a mechanical system configuration diagram of the digital camera according to embodiments of the present invention, in the drawing, 100 denotes a digital camera, the digital camera 100 by the lens 101, 102 contains an automatic focusing or the like, a charge coupled device (Charge -Coupled Device, hereinafter abbreviated as CCD) 103, a correlated double sampling (Correlate dual sampliNg, hereinafter referred to as CDS) circuit 104, a variable gain amplifier (AGC amplifier) ​​105, A / D converter 106, IPP107, discrete cosine converter (Discrete CosiNe TraNsform, hereinafter referred to as DCT) 108, encoder (HuffmaNENcoder / Decoder) 109, a memory card controller (memory card coNtroller, hereinafter abbreviated as MCC) 110, RAM (internal memory) 111, PC card the interface 112, the CPU 121, display unit 122, operation unit 123, motor driver 125, a control signal generator (SG) unit 126, a flash 127, a battery 128, DC-DC converter, a memory 130 configured instantly. 另外,通过PC卡接口112与可装离的PC卡150连接着。 Further, the PC card slot interface 112 and the PC card is connected can be installed from 150.

透镜组件由透镜101、包含自动调焦(AF)·光圈·滤光部的机械机构102等构成,机械机构102的机械快门使两半帧同时曝光。 Lens 101 by the lens assembly, comprising autofocus (the AF) optical-mechanical mechanism diaphragm-like portion 102, the mechanical shutter 102 is mechanical mechanism so that the two field exposed simultaneously. CCD103通过透镜组件将输入镜像变换成电信号(模拟图像数据)。 CCD103 image input through the lens assembly into an electric signal (analog image data). CDS电路104是为了对CCD型摄像元件低杂音化的电路。 CDS circuit 104 is a circuit for the noise of the CCD image sensor is low.

另外,AGC放大器105对由CDS电路104作相关双重取样的信号电平进行补正。 Further, AGC amplifier 105 on the signal level by the CDS circuit 104 as a relative double sampling is corrected. A/D变换器106将通过AGC放大器输入的来自CCD103的模拟图像数据变换成数字图像数据。 CCD103 the analog image data from the A / D converter 106 input through the AGC amplifier into a digital image data. 即,CCD103的输出信号通过CDS电路104及AGC放大器105,再由A/D变换器106,以最合适取样频率(例如NTSC信号的副载波频率的整数倍)变换成数字信号。 That is, the output signal of the CDS circuit 104 by the CCD103 and AGC amplifier 105, and then the A / D converter 106, the most appropriate sampling frequency (e.g. an integer multiple of a subcarrier frequency of an NTSC signal) into a digital signal.

另外,IPP107、DCT108、以及编码器109对由A/D变换器106输入的数字图像数据按色差(cb,cr)和亮度(Y)进行各种处理,补正及图像压缩/伸长的数据处理。 Further, IPP107, DCT108, encoder 109 and the digital image data input from the A / D converter 106 performs various processing according to the color difference (cb, cr) and luminance (Y), and correcting the image compression / elongation data processing . 所谓图像压缩/伸长数据处理是指进行例如JPEG标准的图像压缩/伸长一过程的正交变换以及JPEG标准的图像压缩/伸长一过程的赫夫曼符号化·复号化。 The so-called image compression / extension means for processing data, for example, the JPEG standard image compression / elongation orthogonal transform process and an image compression standard JPEG Huffman elongation process a symbolic number of multiplexed · /.

MCC110是将被压缩处理的图像暂时存储,通过PC卡接口112往PC卡150记录,或从PC卡150读出。 MCC110 is temporarily stored in the compressed image processing, through the PC card interface 112 to record the PC card 150, or 150 is read out from the PC card.

CPU121根据存储在ROM(没有图示)的程序将RAM(没有图示)作为作业区域使用,按照来自操作部123的指示,或者按照没有图示的遥控器等外部动作指示,控制上述数字式照相机内部的全部动作。 The CPU121 program (not shown) stored in the ROM to RAM (not shown) used as a work area, in accordance with an instruction from the operation unit 123 or the like according to an external indication of the operation of a remote controller (not shown), controls the digital camera all internal action. 具体地说,CPU121控制照相动作、自动曝光(AE)动作、自动白平衡(AWB)调整动作、AF动作等。 More specifically, the CPU 121 controls the camera operation, automatic exposure (AE) operation, automatic white balance (AWB) adjustment operation, the AF operation and the like. CPU121根据来自数字式照相机调整装置200的计算机207的指令,可以设定AE机能、AWB机能、AF机能的通/断。 The CPU121 adjustment instruction from the digital camera 200 of the computer device 207, the function may be set AE, the AWB function, the AF function on / off.

另外,照相机电源是从电池128、例如镍镉、镍氢、锂电池等输入到DC-DC转换器129,供给该数字式照相机内部。 Further, the camera 128 from the battery, such as nickel cadmium, nickel hydrogen, lithium batteries, is input to the DC-DC converter 129, supplied to the internal digital camera.

显示部122通过液晶显示、二极管发光、电致发光等实现,显示所摄影的数字图像数据、经伸长处理的记录图像数据,同时,在模式显示部将该数字式照相机状态等表示在画面上。 The display unit 122 through the liquid crystal display, light emitting diodes, and the like to achieve electroluminescence, display the photographed digital image data, the recording image data decompression processing, and at the same time, the display mode of the digital camera unit indicates status on a screen . 操作部123设有用于从外部进行机能选择、摄影指示及其它各种设定的按钮。 Operation unit 123 is provided with buttons for selecting functions, and other various setting photographing instruction from the outside. 在瞬间存储器130中写入用于进行AWB调整的各照明条件下的合适增益值。 Write memory 130 at the moment the appropriate gain value for each lighting conditions AWB adjustment.

上述数字式照相机100设有将摄像而得的图像数据记录在PC卡150上的记录模式、显示上述记录在PC卡150上的图像的显示模式、与数字式照像机调整装置200协同将调整数据写入瞬间存储器130中的记录·调整模式等。 The digital camera 100 is provided with the recording mode of image data obtained by the imaging is recorded on the PC card 150, the display mode of the image recorded on the PC card 150, 200 will be adjusted with the adjusting means cooperative digital camera writing data recording and instantaneous adjustment mode memory 130.

图2表示上述IPP107具体构成一例,IPP107设有将从A/D变换器106输入的数字图像数据分离成三原色R·G·B各色成份的色分离部1071、插入所分离的R·G·B各图像数据的信号插入部1072、调整R·G·B各图像数据黑色信号电平的熄灭脉冲电平(Redestal)调整部1073、调整R·B各图像数据白色电平的白平衡调整部1074、以由CPU121设定的增益对R·G·B各图像数据进行补正的数字增益调整部1075、进行R·G·B各图像数据的R变换的灰度系数变换部1076、将R·G·B各图像数据分离为色差信号(cb,cr)和亮度信号(Y)的矩阵变换(matrix)部1077、以及根据色差信号(cb,cr)和亮度信号(Y)制作视频信号输出到显示部122的视频信号处理部1078。 2 shows a specific structure of the above-described IPP107 one case, with the separation IPP107 digital image data 106 input from the A / D converter into the three primary colors R · G · B color components of the color separating unit 1071, insertion of the separated R · G · B each image data signal insertion section 1072, R · G · B to adjust the black level of each image signal data off pulse level (Redestal) adjusting unit 1073, white balance adjustment unit adjusting the white level of each image data of R · B 1074 gamma converting portion, the CPU121 to set digital gain for correcting a gain adjusting unit 1075 for each image data of R · G · B, for each image data of R · G · B R transformation 1076, the R · G and separate B each image data into color difference signals (cb, cr) and the luminance signal (Y) of the matrix transformation (matrix) portion 1077, and the production of the video signal output from the color difference signals (cb, cr) and the luminance signal (Y) to display a video signal processing portion 122 of the unit 1078.

IPP107还设有检测由熄灭脉冲电平调整部1073调整后的R·G·B各图像数据的亮度数据(Y)的Y运算部1079、仅让在Y运算部检测而得的亮度数据(Y)的所定频率成份通过的BPF1080、将与通过BPF1080的亮度数据(Y)对应的数字计数值作为AF评价值输出到CPU121的AF评价值电路1081、将与经Y运算部1079检测而得的亮度数据(Y)对应的数字计数值作为AE评价值输出到CPU121的AE评价值电路1082、检测经数字增益调整部1075进行增益调整后的R·G·B各图像数据的亮度数据(Y)的Y运算部1083、将与经Y运算部1083检测而得的亮度数据(Y)对应的数字计数值作为AWB评价值输出到CPU121的AWB评价值电路1084、与CPU121接口的CPUI/F1085、以及与DCT108接口的DCTI/F1086等。 IPP107 also a detection luminance data (Y) by the respective images after the off pulse section 1073 to adjust the level adjustment R · G · B Y data calculating unit 1079, so that only the luminance data Y obtained by calculating detection portion (Y value of the output) is BPF1080 frequency components by a predetermined, to the luminance data BPF1080 (Y) of a digital count value corresponding to as an AF evaluation to CPU121 AF evaluation value circuit 1081, and the 1079 for Y arithmetic unit derived by luminance data (Y) corresponding to the digital counts value output as AE evaluation to CPU121 of the AE evaluation value circuit 1082, the luminance data detected by the digital gain adjustment section 1075 after the gain adjustment R · G · B of each image data (Y) is Y calculation unit 1083, and the digital count value corresponding to the detected data obtained luminance (Y) Y calculating unit 1083 as AWB evaluation value to the CPU121 the AWB evaluation value circuit 1084, CPUI interface with CPU121 / F1085, and with DCTI DCT108 interface / F1086 and the like.

上述白平衡调整部1074对于每个R·B设有乘法器1074r、1074b,将CPU121设定的R·B各增益数据分别与输入到各乘法器1074r、1074b的R·B图像数据进行乘法运算,调整图像数据的白平衡。 The above-mentioned white balance adjustment section 1074 is provided for each of the R · B multipliers 1074r, 1074b, the CPU121 R · B each set gain data are input to the respective multipliers 1074r, R · B image data is multiplied 1074b , white balance adjustment image data. 并且,上述AWB评价值·白提取设定电路1084的亮度范围(白检测区域)由CPU121设定。 And the AWB evaluation value of luminance, white extraction range setting circuit 1084 (white detection region) is set by the CPU121.

上述数字增益调整部1075对于R·G·B各设有乘法器1075r、1075g、1075b,将CPU121设定的R·G·B各增益数据分别与输入到各乘法器1075r、1075g、1075b的图像数据进行乘法运算、调整R·G·B图像数据的信号电平。 The digital gain adjusting unit 1075 for each of R · G · B is provided with multipliers 1075r, 1075g, 1075b, the respective R · G · B are respectively set CPU121 gain data input multipliers 1075r, 1075g, 1075b to the image data by multiplying the signal level adjustment R · G · B image data.

下面说明上述数字式照相机100中涉及AWB控制的动作。 In the digital camera 100 relates to AWB control operation will be described below. CPU121在设定作为白平衡调整对象的色温范围(白检测区域)内参照存储在瞬间存储器130中的在各照明条件下的合适增益值计算与从IPP107取入存储在RAM中的AWB评价值对应的合适增益。 CPU121 set as the target color temperature range of white balance adjustment with reference to the appropriate gain value computation storage memory 130 at the moment at each of the lighting conditions (white detection region) is taken from the IPP107 AWB evaluation value stored in the RAM corresponding to the appropriate gain. 接着,CPU121对于摄像取入的图像数据分别乘以适当增益在白平衡调整部1074的R和B乘法器1074R、1074B进行乘法运算,调整图像数据的信号电平,进行AWB控制。 Next, the CPU 121 for imaging the image data taken in are multiplied by an appropriate gain multiplier 1074R R and B white balance adjustment section 1074, 1074b multiplying the adjustment signal level of the image data for AWB control.

关于取入AWB评价值,有在通常摄影动作之前将AWB评价值存储在取入(预扫描)RAM中,摄影时根据该AWB评价值进行AWB控制的方法,以及在通常摄影动作中将AWB评价值存储在取入RAM中、当下次摄影时根据该已取入的AWB评价值进行AWB控制的方法,上述方法那一种都行。 About taken AWB evaluation value, there is usually before the shooting operation will be taken (pre-scan) RAM in the AWB evaluation value stored in AWB control method based on the photography AWB evaluation value and the AWB commentary will usually shooting operation in taking into the RAM, when the value stored for the next picture in accordance with the AWB evaluation value has taken a method of AWB control, the above-described method of that kind will do.

在白平衡调整部1074调整增益的虽然只有R·B,但是本发明并不局限于此,可以调整R·G·B中至少二种组合的增益。 1074 adjust the gain in the white balance adjustment section although only R · B, but the present invention is not limited thereto, may be adjusted R · G · B gain of at least two kinds of combinations.

图3表示本实施例涉及的数字式照相机调整装置200的外观构成图,图4是由数字式照相机100和数字式照相机调整装置200构成的数字式照相机调整系统300的方框构成图。 3 shows a digital camera according to this embodiment of the adjusting means 200 constituting appearance, and FIG. 4 is a block configuration diagram of the digital camera device 200 adjustment system 300 is adjusted by the digital camera 100 and the digital camera.

图3和图4中表示的数字式照相机调整装置200设有:向数字式照相机100供给电源的数字式照相机供给用电源201,用于对数字式照相机供给用电源201进行通用接口母线(GeNeral-Purpose INterface Bus,以下简记为GPIB)控制的适配器202,显示用数字式照相机100所摄影的图像的监视器203,以向量显示在数字式照相机100扫描的彩色信号(RGB)的振幅和位相的向量显示器204,观察监视器203的影像信号用的波形监视器205,屏幕式灰色标度光源206,对数字式照相机100和上述检测器(向量显示器204,波形监视器205等)进行控制等的计算机207,计算机207的显示装置,表示调整菜单等的显示器208,装在计算机207本体中的GPIB I/F209,固定数字式照相机100、进行数字式照相机供给用电源201、RS-232C,视频等信号连接的调整夹具本体210,进行滤光片(W4、C10、C4、W16等)切换的滤光片切换装置212,根 Adjusting the digital camera device 4 shown in FIG. 3 and FIG. 200 is provided with: a supply power supplied to the digital camera to the digital camera 100 with a power source 201, a digital camera for a general-purpose interface to supply power supply bus 201 (General- Purpose INterface Bus, hereinafter referred to as GPIB) control adapter 202, the digital camera 100 displays a photographed image in the monitor 203, a vector is displayed in the digital camera 100 to scan a color signal (RGB) of the amplitude and phase vector display 204, the monitor 203 was observed with a video signal waveform monitor 205, a gray scale screen type light source 206, 100 to the digital camera and said detector (vector display 204, waveform monitor 205, etc.) for controlling the like the computer 207, a display device of a computer 207, represents the adjustment menus, display 208, installed in the computer 207 of the body of the GPIB I / F209, a fixed digital camera 100, the digital camera is supplied with a power source 201, RS-232C, video, etc. clamp body connected to the adjustment signal 210, a filter (W4, C10, C4, W16, etc.) of the switching filter switching device 212, the root 来自计算机207的指令控制滤光片切换装置212的滤光片切换的控制箱211。 Instruction from the control computer 207 filter switch control box 211 of the filter switching device 212. 并且、用光源206和滤光片切换装置212构成照明装置。 And, switching the light source 206 and filter assembly 212 constituting an illumination apparatus.

图5表示上述计算机207的构成,其设有给予操作指示的输入部2071、控制计算机装置整体的CPU2072、存储使上述2072动作的各种控制程序的ROM2073、作为CPU2072的工作区使用的RAM2074。 5 shows a configuration of said computer 207, which is provided with an operation instruction given ROM2073 input unit 2071, the CPU2072 controls the entire computer apparatus, so that the memory 2072 of the operation of the various control programs, RAM2074 used as a work area of ​​the CPU2072.

作为上述控制程序有例如用于将在各照明条件下的合适增益数据等的调整数据写入数字式照相机100的瞬间存储器130中的调整数据制作程序等。 For example, gain data suitable for such lighting conditions in each adjusted data write adjustment data creation program and other memory 130 of the digital camera 100 instantaneously as the control program.

下面参照图6所示流程图说明数字式照相机100和数字式照相机调整装置200协同实行的AWB调整处理顺序。 A flowchart illustrating the digital camera 100 and the digital camera 200 synergistic adjusting apparatus practiced AWB adjustment processing procedure shown below with reference to FIG. 6.

在该AWB调整中,将屏幕式灰色标度设置在光源206(5100K)上,通过在滤光片切换装置212切换不同特性滤光片(W4,C10,C4,W16等),改变光源206的照明条件,计算AWB调整数据。 In the AWB adjustment, the gray scale A screen provided on the light source 206 (5100K), 212 by switching the switching characteristics of different filter means filters (W4, C10, C4, W16, etc.), the light source 206 changes lighting conditions, AWB calculates adjustment data.

先如图5所示,将数字式照相机100装到数字式照相机调整装置200的夹具本体210上,接通数字式照相机100和数字式照相机调整装置200的电源,进行数字式照相机100和数字式照相机调整装置200的初期化处理(步骤S1,P1),图7中的“表示菜单”显示在显示器208(步骤S2)。 As shown before, the digital camera 100 5 attached to the jig body 210 of the digital camera 200 of the adjusting device, is turned digital camera 100 and the digital control device 200 of the camera, the digital camera 100 and digital the camera control device 200 of the initialization process (step S1, P1), in FIG. 7 "represents menu" displayed on the display 208 (step S2). 另外,在数字式照相机100中设定调整·记录模式(步骤P2)。 Further, in the digital camera 100 is set in the recording-adjustment mode (step P2).

接着,若在数字式照相机调整装置200从显示器208的“表示菜单”画面(参照图7)选择AWB调整(步骤S3),则显示图8所示“滤光片选择菜单”画面,从该选择画面选择滤光片(步骤S4)。 Subsequently, as shown when the "filter selection menu" screen of the digital camera 200 from the display control device 208 "represents the menu" screen (see FIG. 7) Select AWB adjustment (step S3), it is displayed in FIG. 8, selected from the selecting filter screen (step S4). 计算机207的CPU2072通过控制箱211将光源206的滤光片切换到所选择的滤光片(步骤S5)。 The computer control box 207 CPU2072 through the filter 211 to filter the light source 206 is switched (step S5) selected.

随后,计算机207的CPU2072通过RS232C电缆向数字式照相机100的CPU121发送表示开始AWB调整的指令(步骤P3)。 Subsequently, the computer CPU2072 207 transmits a start command to the CPU121 AWB adjustment digital camera 100 through the RS232C cable (step P3). 并且,计数器K的值设定为初值“0”(步骤S7)。 Further, the value of the counter K is set to the initial value "0" (step S7).

数字式照相机100的CPU121接收到上述指令(步骤P3),就在将AF机能和AE机能设为接通、AWB机能设为断开状态下,在白平衡调整电路1074的乘法器1074R、1074B分别设定R、B增益初值,进行摄影(步骤P4)。 CPU121 digital camera 100 receives the command (step P3), in the AF and AE functions are turned on and functioning, the AWB function is set to the OFF state, the white balance adjustment circuit 1074 in the multiplier 1074R, 1074B, respectively, set R, B gain initial value, photographing (step P4).

摄影时,从IPP的AWB评价值电路1084向CPU121分别输出设定亮度范围(白检测区域)内的R、G、B的AWB评价值,CPU121将这些R、G、B的AWB评价值送向数字式照相机调整装置200的计算机207(步骤P5)。 When photography, the AWB evaluation value circuit 1084 IPP are output to the set luminance range CPU121 R (white detection region), the evaluation value AWB G, B, and the CPU 121 will AWB evaluation of these R, G, B value is sent to the computer means to adjust the digital camera 207 200 (step P5).

计算机207的CPU2072接收到R、G、B的AWB评价值,就分别计算R、G、B的的∑R、∑G、∑B(步骤S8)。 AWB evaluation value computer CPU2072 207 receives the R, G, B, calculates R, G, B of the ΣR, ΣG, ΣB (step S8). 接着,CPU2072计算∑R/∑G,∑B/∑G(步骤S9),将计数器K的值增加1(步骤S10)。 Next, CPU2072 calculated ΣR / ΣG, ΣB / ΣG (step S9), the value of the counter K is incremented by one (step S10).

随后,CPU2072判断∑R/∑G和∑B/∑G是否处于规定值(1附近)内(步骤S11),当∑R/∑G和∑B/∑G处于规定值内场合,将这时的R、B增益作为AWB调整增益,送向数字式照相机的CPU121(步骤S12)。 Subsequently, CPU2072 determines ΣR / ΣG and ΣB / ΣG is within a predetermined value (close to 1) (step S11), when the inner ΣR / ΣG and ΣB / ΣG predetermined value in case the time the R, B gain adjustment gain as AWB, CPU121 sent to the digital camera (step S12). 数字式照相机100的CPU121接收到该R和B的AWB调整增益,就存入瞬间存储器130中(步骤P6)。 CPU121 digital camera 100 receives the R and B gain adjustment AWB, it instantaneously stored in the memory 130 (step P6).

另一方面,在步骤S11中,当∑R/∑G和∑B/∑G不处于规定值内场合,则移到步骤S13,判断计数器K的值,即调整次数是否比规定次数N多,当K>N时,判断为数字式照相机或环境条件异常,将该信息表示在显示器208上,报知操作者(步骤S15)。 On the other hand, in step S11, when the ΣR / ΣG and ΣB / ΣG case is not within the predetermined value, then control proceeds to step S13, the counter value K is determined, i.e., whether the number of adjustments N more than a predetermined number of times, when K> N, the digital camera determines that abnormality or environmental conditions, this information indicated on the display 208, informing an operator (step S15).

而当K不大于N时,则移到步骤S14,变更R、B增益,使得∑R/∑G和∑B/∑G成为1附近,将计算而得的R、B增益以及应再次摄影的指示送向数字式照相机的CPU2072(步骤S14)。 When K is not greater than N, then control proceeds to step S14, the change R, B gain, such that ΣR / ΣG and ΣB / ΣG become close to 1, calculated from the R, B gain, and again to be photographed CPU2072 indication sent to the digital camera (step S14). 数字式照相机100的CPU121在白平衡调整电路1074的乘法器1074R、1074B设定算得的R、B增益,进行摄影(步骤P4),再次发送AWB评价值(步骤P5)。 CPU121 digital camera 100 is adjusted in the white balance circuit 1074R multiplier 1074, 1074b calculated set R, B gain, photographing (step P4), the transmission AWB evaluation value (step P5) again. 并且,计算机的CPU2072在分别计算∑R、∑G、∑B之后(步骤S8),计算∑R/∑G、∑B/∑G(步骤S9),将计数器K的值增加1(步骤S10),以规定次数N为限,反复上述处理(步骤S14,P4,P5,S8,S9,S10,S11,S13),直到∑R/∑G和∑B/∑G成为上述规定值内。 And, CPU2072 in (step S8) were calculated ΣR, ΣG, ΣB, calculated ΣR / ΣG, ΣB / ΣG (step S9), the value of the counter K is increased computer 1 (step S10) , a predetermined number N is limited, the above-described process is repeated (step S14, P4, P5, S8, S9, S10, S11, S13), until ΣR / ΣG and ΣB / ΣG become within the predetermined value.

对于各滤光片W4,C10,C4,W16进行上述处理(步骤S4-S14,P3-P6),将各照明条件下的AWB调整增益存入瞬间存储器130中。 For W4, C10, C4, W16 the above process (Step S4-S14, P3-P6) of each filter, the AWB adjustment at each instant lighting conditions is stored in the gain memory 130.

在上述处理中,当调整次数大于规定次数时,判断为数字式照相机或环境条件异常,并将该内容表示在显示器208上,报知操作者。 In the above processing, when the number of adjustments greater than a predetermined number of times, it is determined that a digital camera or abnormal environmental conditions, and the contents indicated on the display 208, informing an operator. 但是也可以设定为当调整时间超过所定时间时判断为数字式照相机或环境条件异常。 However, the adjustment may be set when the time exceeds a predetermined time when it is determined that the digital camera or abnormal environmental conditions.

如上所述,在本实施例的数字式照相机100中,CCD103将通过透镜组件101的被照体光变换成电信号,作为彩色图像信号输出,在A/D变换器106将该彩色图像信号作A/D变换,成为数字彩色图像信号输出,IPP107输出与数字彩色图像信号的各色成分(RGB)的亮度数据相对应的,AWB评价值,CPU121参照存储在瞬间存储器130中的各照明条件下的合适增益值,在设定的色温范围内计算与从IPP107输出的AWB评价值对应的合适增益值,在白平衡调整部1074设定上述算得的合适增益,进行AWB调整,即使光源的色温变化也能合适地再现白色。 As described above, the digital camera 100 in the present embodiment, the CCD 103 converts the light illuminated by the lens assembly 101 into an electric signal, an output signal as a color image, the A / D converter 106 for the color image signal a / D conversion, into digital image output color signal, IPP107 output luminance data of each color component (RGB) digital color image signal corresponding to, the AWB evaluation value, the CPU 121 refers to the storage under various lighting conditions at the moment the memory 130 suitable gain values, calculated in the color temperature range of the set value from the appropriate gain corresponding to the AWB evaluation value outputted IPP107, 1074, in a suitable setting the calculated gain of white balance adjustment unit performs AWB adjustment, even though the color temperature of the light source changes also white can be suitably reproduced.

另外,在本实施例的数字式照相机100中,CCD103将通过透镜组件101的被照体光变换成电信号,作为彩色图像信号输出,在A/D变换器106将该彩色图像信号作A/D变换,成为数字彩色图像信号输出,IPP107输出在设定的亮度范围内与数字彩色图像信号的各色成分(RGB)的亮度数据相对应的AWB评价值,CPU121参照存储在瞬间存储器130中的各照明条件下的合适增益值,在设定的色温范围内计算与从IPP107输出的AWB评价值对应的合适增益值,在白平衡调整部1074设定上述算得的合适增益,进行AWB调整,即使光源的色温变化也能合适地再现白色,且可缩短运算时间。 Further, the digital camera 100 in the present embodiment, the CCD 103 is converted by the illuminant light the lens assembly 101 into electrical signals, an output signal as a color image, the A / D converter 106 for the color image signal A / D conversion, an output signal of a digital color image, IPP107 AWB evaluation value output in the set luminance range of the luminance data of each color component (RGB) digital color image signal corresponding to, the CPU 121 refers to the storage in the memory 130 each instant suitable gain values ​​under lighting conditions, and calculating from the output IPP107 set in the color temperature range suitable AWB evaluation value corresponding to a gain value, the gain in the 1074 sets the calculated appropriate white balance adjustment unit performs AWB adjustment, even though the light source the color temperature variation can suitably reproduce the whiteness, and calculation time can be shortened.

Claims (2)

1.一种数字式照相机,设有将通过光学系统的被照体光变换成电信号作为彩色图像信号输出的摄像元件、将上述彩色图像信号作A/D变换作为数字彩色图像信号输出的A/D变换装置;其特征在于,还设有:白检测范围设定装置,用于设定作为白平衡调整对象的色温范围;自动白平衡评价装置,对于上述数字彩色图像信号的各色成分输出与该各色成份的亮度数据相应的自动白平衡评价值;自动白平衡调整装置,用于调整上述数字彩色图像信号中至少二种色的增益;存储在若干种照明条件下的合适增益值的存储装置;自动白平衡控制装置,参照存储在上述存储装置中的合适增益值,在由上述白检测范围设定装置设定的色温范围内,计算与从上述自动白平衡评价装置输出的自动白平衡评价值对应的合适增益值,设定上述自动白平衡调整装置的增益。 A digital camera, with the light into an electrical signal by the optical system of the photographic material as a color image pickup element output signal, the color image signal for the A / D converted digital output signal as a color image A / D converting means; wherein, further provided with: white detection range setting means for setting a white balance adjustment, color temperature range for the object; automatic white balance evaluation means for each color component of the output of the digital color image signal and automatic white balance evaluation value corresponding to the luminance data of each color component; automatic white balance adjustment means for adjusting the digital color image signal gain of at least two colors; appropriate gain value storage means stores at several lighting conditions ; automatic white balance control apparatus, with reference to the appropriate gain value stored in the storage means, within the white detection range set by the color temperature range setting means, the automatic white balance is calculated from the automatic white balance assessment evaluation output means suitable values ​​corresponding to the gain value, the automatic white balance gain setting adjustment device.
2.如权利要求1所述的数字式照相机,其特征在于,还设有:色温检测亮度范围设定装置,用于设定自动白平衡评价装置检测的亮度范围,所述自动白平衡评价装置在上述检测亮度范围设定装置设定的亮度范围内,输出与上述数字彩色图像信号的各色成分的亮度数据对应的自动白平衡评价值。 2. The digital camera according to claim 1, wherein, further provided with: color temperature detector luminance range setting means for setting a brightness range of automatic white balance evaluation means for detecting said automatic white balance evaluation apparatus luminance range luminance in the detection range setting means, the luminance data output to the digital color image signal corresponding to each color component AWB evaluation value.
CN 98119738 1997-09-30 1998-09-29 Digital camera CN1118181C (en)

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JP6286944B2 (en) * 2013-08-28 2018-03-07 ソニー株式会社 Information processing apparatus, imaging apparatus, information processing method, and program
TWI662356B (en) * 2014-11-12 2019-06-11 日商新力股份有限公司 Information processing device, information processing method and computer program product
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