JPS6320993A - White balance adjusting device - Google Patents
White balance adjusting deviceInfo
- Publication number
- JPS6320993A JPS6320993A JP61165854A JP16585486A JPS6320993A JP S6320993 A JPS6320993 A JP S6320993A JP 61165854 A JP61165854 A JP 61165854A JP 16585486 A JP16585486 A JP 16585486A JP S6320993 A JPS6320993 A JP S6320993A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- color signal
- white balance
- white
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000605 extraction Methods 0.000 claims abstract description 12
- 238000012935 Averaging Methods 0.000 claims description 12
- 238000003384 imaging method Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000003086 colorant Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000000284 extract Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はカラービデオカメラのホワイトバランス調整装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a white balance adjustment device for a color video camera.
従来の技術
■ 従来のホワイトバランス調整装置としては、例えば
特開昭５６−４９９３号公報に示されている。第４図は
、この従来のホワイトバランス調整装置の構成を示すも
のであり、３は被写体から入射する光を外部色温度情報
に変換する外部測色回路である。６は撮像素子、７は増
幅器である。４０は外部測色回路３の出力を用いてＲ，
Ｂ色信号の利得を調整するＲ、Ｂ色信号制御器である０
以上のように構成された従来のホワイトバランス調整装
置は、外部測色回路３から得た外部色温度情報を用い、
Ｒ，Ｂ色信号の利得を、Ｒ，Ｂ色信号制御器４０で制御
することによって、被写体の白色部分を示す色信号Ｒ，
Ｇ、Ｂの比が白色を示すデー劫比である１：１：１にな
る様に、ホワイトバランス調整を行う。BACKGROUND TECHNOLOGY (2) A conventional white balance adjustment device is disclosed in, for example, Japanese Patent Laid-Open No. 56-4993. FIG. 4 shows the configuration of this conventional white balance adjustment device, and 3 is an external color measurement circuit that converts light incident from a subject into external color temperature information. 6 is an image sensor, and 7 is an amplifier. 40 uses the output of the external colorimetric circuit 3 to calculate R,
0, which is an R and B color signal controller that adjusts the gain of the B color signal.
The conventional white balance adjustment device configured as described above uses external color temperature information obtained from the external colorimetric circuit 3, and
By controlling the gains of the R and B color signals by the R and B color signal controller 40, the color signals R and B indicating the white part of the subject are controlled.
White balance adjustment is performed so that the ratio of G and B becomes 1:1:1, which is a ratio that indicates white.
■ また、他の従来のホワイトバランス調整装置として
は、例えば特開昭６０−１８０３９４号公報に示されて
いる。第６図は、この従来のホワイトバランス調整装置
の構成を示すものであり、６は撮像素子、７は増幅器で
あり、４１はカラープロセス処理回路、４３．４４はレ
ベル検出回路、４５はアンド回路である。４２はホワイ
トバランス制御回路である。以上のように構成された従
来のホワイトバランス調整装置は、レベル検出器Ａ。(2) Another conventional white balance adjustment device is disclosed in, for example, Japanese Patent Application Laid-Open No. 180394/1983. FIG. 6 shows the configuration of this conventional white balance adjustment device, where 6 is an image sensor, 7 is an amplifier, 41 is a color process processing circuit, 43 and 44 are level detection circuits, and 45 is an AND circuit. It is. 42 is a white balance control circuit. The conventional white balance adjustment device configured as described above is a level detector A.
Ｂ、４３．４４とアンド回路４５により、輝度信号Ｙが
、ある所定レベル以上であり、クロマ信号Ｃが前記とは
異なるある所定レベル以下である低彩度状態を判断し、
この状態の時のみ、ホワイトバランス制御回路４２が、
カラープロセス処理回路４１の出力を利用して、ホワイ
トバランス調整を行う。B, 43, 44 and the AND circuit 45 determine a low saturation state in which the luminance signal Y is above a certain predetermined level and the chroma signal C is below a certain predetermined level different from the above,
Only in this state, the white balance control circuit 42
White balance adjustment is performed using the output of the color process processing circuit 41.
発明が解決しようとする問題点
しかしながら前記従来の技術第１項においては、外部測
色回路３と撮像素子６の分光特性、温度特性に差異があ
る場合、検出色温度と実際の色温度に差ができてしまい
、ホワイトバランス調整に誤差が生じてしまう。また、
外部測色回路３の出力を直接、制御に用いるため、外部
測色回路３にかなシの精度が要求されるため、コストが
高くなりやすい。また、前記従来の技術第２項において
は、レベル検出回路４３．４４の検出しきい値が一定で
あるため、大幅な色温度の変化に対しては、クロマ信号
の大きさを測定しても、被写体自身の彩度を測定するこ
とが困難になり、ホワイトバランス調整の色温度に対す
る追従性が低下してしまう、という問題点を有していた
。Problems to be Solved by the Invention However, in the prior art No. 1, if there is a difference in the spectral characteristics and temperature characteristics of the external colorimetric circuit 3 and the image sensor 6, there is a difference between the detected color temperature and the actual color temperature. This results in an error in white balance adjustment. Also,
Since the output of the external colorimetric circuit 3 is directly used for control, the external colorimetric circuit 3 is required to have high accuracy, which tends to increase costs. Furthermore, in the second conventional technique, since the detection thresholds of the level detection circuits 43 and 44 are constant, large changes in color temperature cannot be detected by measuring the magnitude of the chroma signal. However, there have been problems in that it becomes difficult to measure the saturation of the subject itself, and the ability to follow the color temperature of white balance adjustment decreases.
問題点を解決するための手段
上記問題点を解決するために本発明は外部色温度情報を
得る外部測色回路と、前記外部色温度情報を用いて白い
被写体の色信号データが所定のレベルになる様に制御す
る第１の色信号制御回路と、前記第１の色信号制御回路
の出力における被写体の低彩度部分を抽出する抽出回路
と、前記抽出回路の出力を平均する平均回路と、前記平
均回路の出力を用いて前記第１の色信号制御回路の出力
を、白い被写体を撮像した時の色信号データが白色を示
すデータになる様に制御する第２の色信号制御回路を備
えた構成をとるものである。Means for Solving the Problems In order to solve the above problems, the present invention includes an external color measurement circuit that obtains external color temperature information, and a system that uses the external color temperature information to adjust the color signal data of a white object to a predetermined level. an extraction circuit that extracts a low chroma portion of the subject in the output of the first color signal control circuit; and an averaging circuit that averages the outputs of the extraction circuit; A second color signal control circuit that controls the output of the first color signal control circuit using the output of the averaging circuit so that color signal data when a white subject is imaged becomes data indicating white. It has a similar structure.
作 用
本発明は、上記した構成により、外部色温度情報を用い
て白い被写体の色信号データをある所定レベルになる様
に制御し、その所定レベル近傍、即ち低彩度部分の色信
号のみの平均値を用いて更に細かくホワイトバランス調
整を行う。このため、大幅な色温度の変化に対しても、
追従性が低下することなく、正確なホワイトバランス調
整が可能である。According to the above-described configuration, the present invention uses external color temperature information to control the color signal data of a white object to a certain predetermined level, and controls only the color signal in the vicinity of the predetermined level, that is, the low chroma portion. Perform more fine white balance adjustment using the average value. For this reason, even when there is a large change in color temperature,
Accurate white balance adjustment is possible without deteriorating followability.
実施例
以下、本発明の実施例のホワイトバランス調整装置につ
いて図面を参照しながら説明する０本発明の実施例のホ
ワイトバランス調整装置は基本構成を第１図に示す様に
、外部色温度情報を得る外部測色回路３と、外部色温度
情報を用いて白い被写体の色信号データが所定のレベル
になる様に制御する第１の色信号制御回路１と、この第
１の色信号制御回路１の出力における被写体の低彩度部
分を抽出する白油出回路４と、白油出回路４の出力を平
均する平均回路６と、平均回路５の出力を用いて第１の
色信号制御回路１の出力を制御する第２の色信号制御回
路２を備えたものである。Embodiment Hereinafter, a white balance adjustment device according to an embodiment of the present invention will be explained with reference to the drawings.The white balance adjustment device according to an embodiment of the present invention has a basic configuration as shown in FIG. a first color signal control circuit 1 that uses external color temperature information to control the color signal data of a white object to a predetermined level; A white oil output circuit 4 extracts a low chroma part of the subject in the output of the white oil output circuit 4, an averaging circuit 6 averages the output of the white oil output circuit 4, and a first color signal control circuit 1 using the output of the averaging circuit 5. The color signal control circuit 2 includes a second color signal control circuit 2 that controls the output of the color signal.
第１図に示した構成により、外部色温度情報を用いて白
い被写体の色信号データを、ある所定レベルになる様に
制御し、その所定レベル近傍、即ち低彩度部分の色信号
のみの平均値を用いて更に細かくホワイトバランス調整
を行う０
第２図は本発明の第１の実施例におけるホワイトバラン
ス調整装置のより詳細なブロック図を示すものである。With the configuration shown in Figure 1, external color temperature information is used to control the color signal data of a white object to a certain predetermined level, and the average of only the color signals in the vicinity of the predetermined level, that is, the low chroma portion. Performing more detailed white balance adjustment using the value 0 FIG. 2 shows a more detailed block diagram of the white balance adjustment device in the first embodiment of the present invention.
第２図において、６は撮像素子、７は増幅器、８はプロ
セス処理回路、９〜１４は可変利得増幅器、１５は外部
測色回路、１６は変換回路、１７は白油出回路、１８〜
２ｏは平均回路、２１．２２は除算回路、２３．２４は
サンプル・ホールド回路、２６は割合検出回路である。In FIG. 2, 6 is an image sensor, 7 is an amplifier, 8 is a process processing circuit, 9 to 14 are variable gain amplifiers, 15 is an external color measurement circuit, 16 is a conversion circuit, 17 is a white oil extraction circuit, and 18 to 14 are variable gain amplifiers.
2o is an average circuit, 21.22 is a division circuit, 23.24 is a sample/hold circuit, and 26 is a ratio detection circuit.
撮像素子６から出力された映像信号は、増幅器７を通り
、プロセス処理回路８によって、Ｒ・Ｇ、Ｂ信号と、輝
度信号Ｙに変換される〇一方、外部測色回路３によって
得られた外部色温度情報が、変換回路１６を通じて可変
利得増幅器９〜１１の利得を制御することによって、白
い被写体を撮像した場合の色信号Ｒ，Ｇ、Ｈの比が１：
１：１になる様に制御する。この場合、外部色温度情報
の誤差により正確に１：１：１にならず、多少の誤差を
有していても、後述の処理で補正される。次に、白油出
回路１７は、可変利得増幅器９〜１１の出力と、輝度信
号Ｙを参照して、被写体の低彩度部分、即ちＲ：Ｇ：Ｂ
が１＝１：１に近い部分の色信号のみを抽出する。色信
号の抽出条件を式１゜式２１式３に示す。The video signal output from the image sensor 6 passes through the amplifier 7 and is converted into R, G, and B signals and a luminance signal Y by the process processing circuit 8. On the other hand, the video signal obtained by the external color measurement circuit 3 By using the external color temperature information to control the gains of the variable gain amplifiers 9 to 11 through the conversion circuit 16, the ratio of color signals R, G, and H when photographing a white subject is 1:1.
Control so that the ratio is 1:1. In this case, even if the ratio is not exactly 1:1:1 due to an error in the external color temperature information and there is some error, it will be corrected in the processing described later. Next, the white oil output circuit 17 refers to the outputs of the variable gain amplifiers 9 to 11 and the luminance signal Y to detect the low chroma portion of the object, that is, R:G:B.
Only the color signals of the portion where the ratio is close to 1=1:1 are extracted. The color signal extraction conditions are shown in Equation 1, Equation 21, and Equation 3.
１Ｂ−Ｇｌ＜α１・Ｙ （式１）ＩＲ−Ｇ
ｌ＜α２・Ｙ （式２）Ｙ〉β
（式３）
ここでα１．α２は比較的小さい値に設定される。1B-Gl<α1・Y (Formula 1) IR-G
l<α2・Y (Formula 2) Y>β
(Formula 3) where α1. α2 is set to a relatively small value.
また、式３の条件は、ホワイトバランス調整の精度を保
つために必要であるが、理想的な動作のみ考える場合は
、式３の条件はなくても基本的動作に支障はない。また
、Ｙ信号はＧ信号とおきかえてもよい。このようにして
、１フイ一ルド分の白油出回路１７の出力Ｒ−Ｇ、Ｂが
平均回路１８゜１９．２０によシ平均され、Ｒ−Ｇ−Ｂ
信号となり、除算回路２１．２２によシＧ／Ｒ，Ｇ／Ｂ
信号が得られる。次に、割合検出回路２５にょシ、被写
体の低彩度部分が、ある所定レベル以上の割合になった
時のみ、サンプル−ホールド回路２３゜２４、は前述の
Ｇ／Ｒ，Ｇ／Ｂ信号をサンプルし、ボルドする。これに
よシ、被写体の低彩度部分が少ない場合のホワイトバラ
ンス調整誤差の増大を防いでいる。そしてサンプル・ホ
ールド回路２３１２４の出力により、可変利得増幅器１
２．１４の利得を制御し、ホワイトバランス調整を行う
。以上の動作は１フイールドを１周期としたが、複数フ
ィールドを１周期としてもよい。また、以上のホワイト
バランス調整動作は、白い被写体を撮像した時、Ｒ，Ｇ
、Ｂ信号の比が１：１：１になる様に制御しているが、
Ｒ−Ｙ、Ｂ−Ｙ信号が０になる様に制御してもよい。Further, the condition of Equation 3 is necessary to maintain the precision of white balance adjustment, but if only ideal operation is considered, the condition of Equation 3 may not be present without any problem in basic operation. Further, the Y signal may be replaced with the G signal. In this way, the outputs R-G and B of the white oil output circuit 17 for one field are averaged by the averaging circuit 18°19.20, and the R-G-B
The signal becomes G/R, G/B by the division circuits 21 and 22.
I get a signal. Next, the sample-and-hold circuits 23 and 24 detect the aforementioned G/R and G/B signals only when the proportion of the low chroma portion of the subject exceeds a certain predetermined level. Sample and bold. This prevents an increase in white balance adjustment errors when there are few low-saturation parts of the subject. Then, by the output of the sample and hold circuit 23124, the variable gain amplifier 1
2.14 gain is controlled and white balance adjustment is performed. In the above operation, one field is one cycle, but a plurality of fields may be one cycle. In addition, the above white balance adjustment operation is performed when capturing an image of a white subject.
, the B signal ratio is controlled to be 1:1:1,
The R-Y and B-Y signals may be controlled to be zero.
第３図は、本発明の第２の実施例を示すホワイトバラン
ス調整装置のブロック図であり、動作としては白い被写
体を撮像した場合、色差信号が０になる様に制御するも
のである。第３図において、２６はプロセス処理回路、
２７は変換回路、２８〜３１は可変利得増幅器、３２は
白油出回路である０
撮像素子６、増幅器子よシ得られた映像信号は、プロセ
ス処理回路２６によシＲ−Ｙ 、 Ｂ−Ｙ 、輝度信号
Ｙとなる。一方、外部測色回路３により得られる外部色
温度情報を用いて変換回路２７は、可変利得増幅器２８
．２９の利得を制御し、この出力を加算器３６．３７を
用いてＲ−Ｙ、Ｂ−Ｙ信号に加算し、白い被写体を撮像
した場合、Ｒ−Ｙ。FIG. 3 is a block diagram of a white balance adjustment device showing a second embodiment of the present invention, and its operation is such that when a white subject is imaged, the color difference signal is controlled to be 0. In FIG. 3, 26 is a process processing circuit;
27 is a conversion circuit, 28 to 31 are variable gain amplifiers, and 32 is a white oil extraction circuit.0 The image signal obtained from the image pickup device 6 and the amplifier device is sent to the process processing circuit 26. Y, the luminance signal Y. On the other hand, using the external color temperature information obtained by the external colorimetric circuit 3, the conversion circuit 27 converts the variable gain amplifier 28 into
．． 29 and adds this output to the R-Y and B-Y signals using adders 36 and 37, and when a white subject is imaged, R-Y.
Ｂ−Ｙ信号が０になる様に制御する。この場合、外部色
温度情報の誤差により正確に０にならず、ある程度の誤
差を含んでいても、後述の処理で補正される。次に白油
出回路３２は、加算器３６゜３７の出力と、輝度信号Ｙ
を参照して、被写体の低彩度部分のＲ−Ｙ、Ｂ−Ｙ信号
を抽出する。抽出条件を式４，５．６に示す。Control is performed so that the B-Y signal becomes 0. In this case, even if the external color temperature information does not become exactly 0 due to an error and contains a certain amount of error, it will be corrected in the processing described later. Next, the white oil output circuit 32 outputs the output of the adders 36 and 37 and the luminance signal Y.
With reference to , the RY and BY signals of the low chroma portion of the subject are extracted. The extraction conditions are shown in equations 4 and 5.6.
ＪＲ−Ｙｌ（α３・Ｙ （式４）ＩＢ−Ｙｌ＜α
４・Ｙ （式５）Ｙ〉δ （弐〇
）
ここで、ａ３．α４は比較的小さい値に設定される。ま
た、弐〇の条件は、ホワイトバランス調整精度を保つた
めに必要であるが、理想的な動作を考える場合は、弐〇
の条件がなくても基本的動作に支障はない。このように
して抽出された被写体の低彩度部分のＲ−Ｙ、Ｂ−Ｙ信
号は平均回路３３．３４により平均される。次に、割合
検出回路２５によシ、被写体の低彩度部分が、ある所定
レベル以上の割合になった時のみ、サンプル・ホールド
回路２３．２４は、前述の平均回路の出力をサンプルし
、ホールドする。そして、サンプル・ホールド回路２３
．２４の出力を用いて可変利得増幅器３０．３１の利得
を制御し、この出力を加算器３８．３９を用いて加算器
３６．３７の出力に加算する。これにより、白い被写体
を撮像した場合のＲ−Ｙ 、Ｂ−Ｙ信号が０になる様に
制御され、ホワイトバランスが調整される０
なお、以上の実施例は、色信号としてＲ−Ｇ−Ｂ信号と
、Ｒ−Ｙ 、Ｂ−Ｙ信号を考慮した場合であるが、撮像
素子６から出力される画素信号を用いても同様にホワイ
トバランス調整が可能である。JR-Yl(α3・Y (Formula 4) IB-Yl<α
4・Y (Formula 5) Y〉δ (2〇) Here, a3. α4 is set to a relatively small value. Further, the condition 2〇 is necessary to maintain white balance adjustment accuracy, but when considering ideal operation, there is no problem in basic operation even if the condition 2〇 is not met. The RY and BY signals of the low chroma portion of the subject extracted in this way are averaged by averaging circuits 33 and 34. Next, according to the proportion detection circuit 25, only when the proportion of the low chroma portion of the object exceeds a certain predetermined level, the sample and hold circuits 23 and 24 sample the output of the above-mentioned averaging circuit, Hold. Then, the sample and hold circuit 23
．． The output of 24 is used to control the gain of variable gain amplifier 30.31, and this output is added to the output of adder 36.37 using adder 38.39. As a result, when a white subject is imaged, the R-Y and B-Y signals are controlled to be 0, and the white balance is adjusted to 0. Although this is a case in which the R-Y and B-Y signals are taken into consideration, white balance adjustment can be similarly performed using the pixel signal output from the image sensor 6.
発明の詳細
な説明した様に、本発明によれば、外部色温度情報を用
いて白い被写体の色信号のデータを所定のレベルに変換
し、その所定レベル近傍の、即ち低彩度部分の色信号の
平均値を用いて更にホワイトバランス調整を行うため、
外部色温度情報のみを用いる方法はど外部色温度情報の
精度を必要としない。また、大幅な色温度の変化に対し
ての追従性がよく、かつホワイトバランス調整誤差が小
さいので、その実用的効果は大きい。As described in detail, according to the present invention, the color signal data of a white object is converted to a predetermined level using external color temperature information, and the colors near the predetermined level, that is, the low chroma portion, are In order to perform further white balance adjustment using the average value of the signal,
A method using only external color temperature information does not require the accuracy of external color temperature information. Further, since it has good followability to large changes in color temperature and small white balance adjustment errors, its practical effects are great.
第１図は本発明の実施例のホワイトバランス調整装置の
基本構成図、第２図は本発明における第１の実施例のブ
ロック図、第３図は本発明における第２の実施例のブロ
ック図、第４図は第１の従来のホワイトバランス調整装
置のブロック図、第６図は第２の従来のホワイトバラン
ス調整装置のブロック図である。FIG. 1 is a basic configuration diagram of a white balance adjustment device according to an embodiment of the present invention, FIG. 2 is a block diagram of a first embodiment of the present invention, and FIG. 3 is a block diagram of a second embodiment of the present invention. , FIG. 4 is a block diagram of a first conventional white balance adjustment device, and FIG. 6 is a block diagram of a second conventional white balance adjustment device.
Claims (4)
色温度情報を用いて白い被写体の色信号データが所定の
レベルになる様に制御する第１の色信号制御回路と、前
記第１の色信号制御回路の出力における被写体の低彩度
部分を抽出する抽出回路と、前記抽出回路の出力を平均
する平均回路と、前記平均回路の出力を用いて前記第１
の色信号制御回路の出力を、白い被写体を撮像した時の
色信号データが白色を示すデータになる様に制御する第
２の色信号制御回路を備えたことを特徴とするホワイト
バランス調整装置。(1) an external colorimetric circuit that obtains external color temperature information; a first color signal control circuit that uses the external color temperature information to control color signal data of a white subject to a predetermined level; an extraction circuit for extracting a low chroma part of the subject in the output of the first color signal control circuit; an averaging circuit for averaging the outputs of the extraction circuit; and an averaging circuit for averaging the output of the first color signal control circuit;
A white balance adjustment device comprising a second color signal control circuit that controls the output of the color signal control circuit so that the color signal data when a white subject is imaged becomes data indicating white.
定のレベルの範囲にあることを合わせて用いることを特
徴とする特許請求の範囲第１項記載のホワイトバランス
調整装置。(2) The white balance adjustment device according to claim 1, wherein the extraction circuit also uses as an extraction criterion that the imaging luminance information is within a predetermined level range.
値を前記外部色温度情報により決定し、また、被写体に
低彩度部分がない場合、前記色信号の制御値をホールド
する回路を備えたことを特徴とする特許請求の範囲第１
項または第２項記載のホワイトバランス調整装置。(3) The second color signal control circuit determines the initial value of the color signal control value based on the external color temperature information, and holds the color signal control value when there is no low chroma part in the subject. Claim 1 characterized in that it is equipped with a circuit that
The white balance adjustment device according to item 1 or 2.
る所定の割合以上である場合のみの平均回路の出力を用
いて前記第２の色信号制御回路を動作させる回路を備え
たことを特徴とする特許請求の範囲第１項〜第３項のい
ずれかに記載のホワイトバランス調整装置。(4) The second color signal control circuit includes a circuit that operates the second color signal control circuit using the output of the averaging circuit only when the amount extracted by the extraction circuit is equal to or higher than a certain predetermined ratio. A white balance adjustment device according to any one of claims 1 to 3, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61165854A JP2529210B2 (en) | 1986-07-15 | 1986-07-15 | White balance adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61165854A JP2529210B2 (en) | 1986-07-15 | 1986-07-15 | White balance adjustment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6320993A true JPS6320993A (en) | 1988-01-28 |
| JP2529210B2 JP2529210B2 (en) | 1996-08-28 |
Family
ID=15820255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61165854A Expired - Fee Related JP2529210B2 (en) | 1986-07-15 | 1986-07-15 | White balance adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2529210B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0564221A (en) * | 1991-09-02 | 1993-03-12 | Matsushita Electric Ind Co Ltd | Auto white balance device |
| EP0663779A2 (en) * | 1993-12-22 | 1995-07-19 | Goldstar Co. Ltd. | A white-balance adjusting apparatus and a method thereof for a video camera |
| WO2004114678A1 (en) * | 2003-06-24 | 2004-12-29 | Olympus Corporation | Image processing system and image processing method |
| US7808533B2 (en) | 1998-06-30 | 2010-10-05 | Nikon Corporation | Electronic camera having signal processing units that perform signal processing on image data |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116391A (en) * | 1980-02-19 | 1981-09-12 | Sanyo Electric Co Ltd | Automatic adjusting device of white balance |
| JPS6152885U (en) * | 1984-09-12 | 1986-04-09 | ||
| JPS61150488A (en) * | 1984-12-24 | 1986-07-09 | Sony Corp | Color video camera |
-
1986
- 1986-07-15 JP JP61165854A patent/JP2529210B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56116391A (en) * | 1980-02-19 | 1981-09-12 | Sanyo Electric Co Ltd | Automatic adjusting device of white balance |
| JPS6152885U (en) * | 1984-09-12 | 1986-04-09 | ||
| JPS61150488A (en) * | 1984-12-24 | 1986-07-09 | Sony Corp | Color video camera |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0564221A (en) * | 1991-09-02 | 1993-03-12 | Matsushita Electric Ind Co Ltd | Auto white balance device |
| EP0663779A2 (en) * | 1993-12-22 | 1995-07-19 | Goldstar Co. Ltd. | A white-balance adjusting apparatus and a method thereof for a video camera |
| EP0663779A3 (en) * | 1993-12-22 | 1997-03-05 | Gold Star Co | A white-balance adjusting apparatus and a method thereof for a video camera. |
| US7808533B2 (en) | 1998-06-30 | 2010-10-05 | Nikon Corporation | Electronic camera having signal processing units that perform signal processing on image data |
| US8878956B2 (en) | 1998-06-30 | 2014-11-04 | Nikon Corporation | Digital camera and storage medium for image signal processing for white balance control |
| WO2004114678A1 (en) * | 2003-06-24 | 2004-12-29 | Olympus Corporation | Image processing system and image processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2529210B2 (en) | 1996-08-28 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |