JPS6120481A - Automatic hue correcting device of color camera - Google Patents
Automatic hue correcting device of color cameraInfo
- Publication number
- JPS6120481A JPS6120481A JP59140857A JP14085784A JPS6120481A JP S6120481 A JPS6120481 A JP S6120481A JP 59140857 A JP59140857 A JP 59140857A JP 14085784 A JP14085784 A JP 14085784A JP S6120481 A JPS6120481 A JP S6120481A
- Authority
- JP
- Japan
- Prior art keywords
- color temperature
- burst
- phase
- signals
- output
- 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.)
- Pending
Links
Landscapes
- Processing Of Color Television Signals (AREA)
- Color Television Image Signal Generators (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明はカラーカメラの自動色相補正装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to an automatic hue correction device for a color camera.
従来例の構成とその問題点
簡易カメラでは光源の色温度が変わると、撮像特性がか
わって、色再現性が大きく変化する。今、３２００°に
の光源の時の撮像特性とすれば光源の色温度が変化する
ことにより、撮像特性が理想特性に対して大きく異なり
、各色の位相がバースト位相に対して変わってしまう。Conventional configuration and its problems In simple cameras, when the color temperature of the light source changes, the imaging characteristics change and the color reproducibility changes significantly. Now, if we consider the imaging characteristics when the light source is at 3200°, the imaging characteristics will differ greatly from the ideal characteristics due to the change in the color temperature of the light source, and the phase of each color will change with respect to the burst phase.
そのために撮像管前面に色温度変換用のフィルタを設置
し、撮像管への入射光の色温度を３２０００Ｋになるよ
うに切換える方法をとった場合、その操作が面倒である
。Therefore, if a color temperature conversion filter is installed in front of the image pickup tube and the color temperature of the light incident on the image pickup tube is changed to 32,000 K, the operation is troublesome.
発明の目的
本発明は、このような欠点を除去したもので、入射光の
色温度の変化に対応して連続的に色相補正が行なえるよ
うにしたものである。OBJECTS OF THE INVENTION The present invention eliminates these drawbacks and enables continuous hue correction in response to changes in the color temperature of incident light.
発明の構成
そのために本発明は、光源の色温度を検出する手段、バ
ースト信号の位相を上記色温度に追従させて連続的に可
変する手段を設けたものである。Structure of the Invention For this purpose, the present invention is provided with means for detecting the color temperature of the light source and means for continuously varying the phase of the burst signal to follow the color temperature.
実施例の説明
以下、図面の一実施例により説明する。ここで１は撮像
管、２はＹ信号を取り出すフィルタ、３はＲ，Ｂ信号分
離回路、４は変調器、５は同期信号発生器、６はバース
ト分離器で、映像信号とバースト信号を分離する。７は
バースト位相調整器。DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment will be explained with reference to the drawings. Here, 1 is an image pickup tube, 2 is a filter that takes out the Y signal, 3 is an R and B signal separation circuit, 4 is a modulator, 5 is a synchronization signal generator, and 6 is a burst separator that separates the video signal and burst signal. do. 7 is a burst phase adjuster.
８け色温度入力端子９からの色温度情報にもとづき、位
相を可変する色相補正器、１０はエジコーダ、１１はＮ
ＴＳＣ信号の出力端子である。A hue corrector that varies the phase based on the color temperature information from the 8 color temperature input terminal 9; 10 is an ecoder; 11 is an N
This is an output terminal for the TSC signal.
次にこの構成にもとづく動作を説明する。まず、撮像管
１の出力をフィルタ２を介してエンコーダ１０に加える
こと、色分離回路３でＲ，Ｂ信号を取り出し、必要な処
理を施した後、変調器４で同期信号発生回路５からのバ
ーストパルスとともに変調し、次に変調器４の出力をバ
ースト分離器６にて映像信号とバースト信号を分離し、
バースト信号の位相をバースト位相器７にて調整し、映
像信号とともにエンコーダＩＯＫ加え、端子１１よりＮ
ＴＳＯ化した撮像出力を得ることは周知である。ここで
変調器４．同期信号発生器５の出力を入力とするバース
ト分離器６を通じて分離されるバースト信号を、Ｒ−Ｙ
Ｌ変調信号、Ｂ−盲愛調信号の位相関係が色温度３２０
０°にの状態で第３図の状態になるようバースト位相調
整器７でその調整を行なうものであるが（第２図に示す
コンデンサ７を可変する）、端子９からの入力を一定と
した場合、色温度が変化すれば設定値３２００°Ｋに対
してその変化分だけずれることになり、従来例で説明し
たような欠点が生じてし塘う。そこで、本発明では端子
９より、色温度情報を常時入手しそれに応じて色相補正
を行う。Next, the operation based on this configuration will be explained. First, the output of the image pickup tube 1 is applied to the encoder 10 via the filter 2, the R and B signals are taken out by the color separation circuit 3, and the necessary processing is performed. modulated along with the burst pulse, and then the output of the modulator 4 is separated into a video signal and a burst signal by a burst separator 6,
Adjust the phase of the burst signal with the burst phase shifter 7, add the encoder IOK together with the video signal, and connect the terminal 11 to the N
It is well known to obtain TSO imaged output. Here, modulator 4. The burst signal separated through the burst separator 6 which receives the output of the synchronization signal generator 5 as input
The phase relationship between the L modulation signal and the B-blind love tone signal is a color temperature of 320.
The burst phase adjuster 7 is used to adjust the 0° state so that the state shown in Figure 3 is achieved (by varying the capacitor 7 shown in Figure 2), but the input from the terminal 9 is kept constant. In this case, if the color temperature changes, it will deviate from the set value of 3200°K by the amount of the change, and the drawbacks described in the conventional example will still occur. Therefore, in the present invention, color temperature information is constantly obtained from the terminal 9 and hue correction is performed accordingly.
色相補正について第２図により説明すると１色相補正器
８のバリキャップ８１の容量を可変することにより、色
相補正器８の出力（バースト信号の位相）を第４図のよ
うに可変するようにしている。第４図において、８２は
３２００’に時のバースト信号、８３け例えば８０００
°に時、８４け２０００°に時のバースト信号を示して
いる。Hue correction will be explained with reference to FIG. 2.1 By varying the capacitance of the varicap 81 of the hue corrector 8, the output of the hue corrector 8 (the phase of the burst signal) can be varied as shown in FIG. There is. In FIG. 4, 82 is a burst signal at 3200', 83 is a 8000' burst signal, for example
The burst signal is shown at 84° and 2000°.
なお、端子９への入力の得かたとしては外界光源の色温
度を電気出力として検出するセンサの出力、あるいはホ
ワイトバランスをとった際の赤信号と青信号のゲインコ
ントロール量の差かう得ルようにしてもよく、この出力
が３２００°Ｋに比較してどうかを得、これでもってバ
リキャップ８１への電圧をコントロールするようにすれ
ばよい。In addition, the input to terminal 9 can be obtained from the output of a sensor that detects the color temperature of the external light source as an electrical output, or from the difference in the amount of gain control between the red signal and the green signal when performing white balance. However, the voltage to the varicap 81 may be controlled by determining how this output compares to 3200°K.
発明の効果
従って、本発明によればバースト信号を色温度に応じて
連続的可変するようにしているために、Ｒ−ＹＬ倍信号
Ｂ−ＹＬ倍信号関係もそれに追従することＫなり、高品
質のカメラが得られる。すなわち、光源の色温度変化で
色再現性を劣化させることがないカメラが得られる。Effects of the Invention Therefore, according to the present invention, since the burst signal is continuously varied according to the color temperature, the relationship between the R-YL times signal and the B-YL times signal also follows, resulting in high quality. camera is obtained. That is, it is possible to obtain a camera in which color reproducibility is not degraded due to changes in the color temperature of the light source.
第１図は本発明の一実施例におけるカラーカメラの自動
色相補正装置を示すブロック図、第２図はその一部の詳
細図、第３図、第４図はバースト信号とＲ−ＹＬ倍信号
Ｂ−ＹＬ倍信号位相関係図である。
６・・パーストゲート、７・・・バースト位相調整器、
８・・・色相補正器。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
第２図
ノ糺
７ σ
第３図
Ｅ−Ｙｔ
第４図
’３−Ｙｔ
−ＹｔFIG. 1 is a block diagram showing an automatic hue correction device for a color camera according to an embodiment of the present invention, FIG. 2 is a detailed diagram of a part thereof, and FIGS. 3 and 4 are burst signals and R-YL multiplied signals. It is a B-YL times signal phase relation diagram. 6... Burst gate, 7... Burst phase adjuster,
8...Hue corrector. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 No. 7 σ Figure 3 E-Yt Figure 4 '3-Yt -Yt
Claims (1)
＿Ｌ信号の位相を調正する調整器、その調整器の出力を
入力とする一方色温度を常時検出し、その出力に応じて
バースト信号の位相を可変する色相補正器よりなるカラ
ーカメラの自動色相補正装置。Burst signal and R-Y_L signal at constant color temperature, B-Y
Automatic hue of a color camera consisting of a regulator that adjusts the phase of the L signal, and a hue corrector that receives the output of the regulator as input, constantly detects the color temperature, and changes the phase of the burst signal according to the output. correction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59140857A JPS6120481A (en) | 1984-07-06 | 1984-07-06 | Automatic hue correcting device of color camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59140857A JPS6120481A (en) | 1984-07-06 | 1984-07-06 | Automatic hue correcting device of color camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6120481A true JPS6120481A (en) | 1986-01-29 |
Family
ID=15278349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59140857A Pending JPS6120481A (en) | 1984-07-06 | 1984-07-06 | Automatic hue correcting device of color camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6120481A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0579602A (en) * | 1992-01-24 | 1993-03-30 | Miura Co Ltd | Structure of heat transfer surface in multitubular type once-through boiler |
| JP2007309378A (en) * | 2006-05-17 | 2007-11-29 | Sanwa Seiki Co Ltd | Cab tilting device |
-
1984
- 1984-07-06 JP JP59140857A patent/JPS6120481A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0579602A (en) * | 1992-01-24 | 1993-03-30 | Miura Co Ltd | Structure of heat transfer surface in multitubular type once-through boiler |
| JP2007309378A (en) * | 2006-05-17 | 2007-11-29 | Sanwa Seiki Co Ltd | Cab tilting device |
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