JP2749405B2 - Electronic still camera device - Google Patents
Electronic still camera deviceInfo
- Publication number
- JP2749405B2 JP2749405B2 JP1325196A JP32519689A JP2749405B2 JP 2749405 B2 JP2749405 B2 JP 2749405B2 JP 1325196 A JP1325196 A JP 1325196A JP 32519689 A JP32519689 A JP 32519689A JP 2749405 B2 JP2749405 B2 JP 2749405B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- strobe light
- strobe
- light emission
- 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.)
- Expired - Lifetime
Links
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- Color Television Image Signal Generators (AREA)
- Processing Of Color Television Signals (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、被写体を静止画としてフロッピーディスク
に記録する電子スチルカメラ装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic still camera device for recording a subject as a still image on a floppy disk.
従来の技術 以下従来例について第２図に基づいて説明する。被写
体の光学像はレンズ１を通して撮像素子２に入力され、
光学像が電気信号に変換され、撮像信号処理回路３を経
て、輝度信号（以下Ｙ信号と略す）と帯域制限された輝
度信号（以下ＹL信号と略す）と色信号に分離される。
色信号はさらに色信号分離回路４を経てＲ信号とＢ信号
に分離される。2. Description of the Related Art A conventional example will be described below with reference to FIG. An optical image of a subject is input to an image sensor 2 through a lens 1,
An optical image is converted into an electric signal, via an imaging signal processing circuit 3, (hereinafter referred to as Y signal) luminance signal and the band-limited luminance signals (hereinafter referred to as Y L signal) to be separated into color signals.
The color signal is further separated into an R signal and a B signal through a color signal separation circuit 4.
拡散板５により、電子スチルカメラ周囲の広範囲の光
を光センサ６に入力し、光センサ６に入力された周囲光
は電子信号に変換され、色温度演算回路19に入力され
る。色温度演算回路19はたとえば拡散板５と光センサ６
の間にR,G,B3色の色フィルタを配置し、光センサ６より
得られたＲ信号、Ｂ信号及びＧ信号により被写体周囲の
色温度を検知し、Ｒ利得制御回路８の制御信号としての
ｒ信号を、Ｂ利得制御回路９の制御信号としてのｂ信号
を演算作成する。Light from a wide area around the electronic still camera is input to the optical sensor 6 by the diffusion plate 5, and the ambient light input to the optical sensor 6 is converted into an electronic signal and input to the color temperature calculation circuit 19. The color temperature calculation circuit 19 includes, for example, the diffusion plate 5 and the
A color filter of three colors of R, G, and B is arranged between them, and a color temperature around the subject is detected by an R signal, a B signal, and a G signal obtained from the optical sensor 6, and is used as a control signal of the R gain control circuit 8. And the b signal as a control signal of the B gain control circuit 9 is calculated from the r signal.
ストロボ撮影でないときは、スイッチ21はＡ側に、ス
イッチ22はＣ側に切り換わり、光センサ６の入力情報に
基づいた利得制御信号がＲ利得制御回路８およびＢ利得
制御回路９に入力され、利得制御信号r,bとなる。When the flash shooting is not performed, the switch 21 is switched to the A side and the switch 22 is switched to the C side, and a gain control signal based on the input information of the optical sensor 6 is input to the R gain control circuit 8 and the B gain control circuit 9, The gain control signals are r and b.
ストロボ撮影時は、ストロボ発光制御回路20によりス
トロボ発光指令信号がストロボ10に出力され、ストロボ
が発光する。ストロボセンサ11はストロボの被写体より
の反射光を検知し、一定量の光量が入射されたとき、ス
トロボ発光制御回路20に検知信号を出力し、ストロボの
発光を停止させる。ストロボ発光時は、ストロボ発光制
御回路20よりストロボON信号がスイッチ21およびスイッ
チ22に出力され、スイッチ21はＢ側に、スイッチ22はＤ
側に切り換わり、あらかじめ不揮発性メモリ23に記録さ
れていた信号がＲ利得制御回路８の制御信号であるｒ信
号として、またＢ利得制御回路９の制御信号であるｂ信
号として出力される。At the time of flash photography, a flash emission command signal is output to the flash 10 by the flash emission control circuit 20, and the flash emits light. The strobe sensor 11 detects reflected light from the subject of the strobe, and outputs a detection signal to the strobe light emission control circuit 20 to stop the strobe light emission when a certain amount of light is incident. At the time of strobe light emission, a strobe ON signal is output from the strobe light emission control circuit 20 to the switches 21 and 22. The switch 21 is on the B side and the switch 22 is on the D side.
The signal is previously recorded in the non-volatile memory 23 and is output as an r signal as a control signal of the R gain control circuit 8 and as a b signal as a control signal of the B gain control circuit 9.
色信号分離回路４より出力されたＲ信号とＢ信号は、
それぞれＲ利得制御回路８およびＢ利得制御回路９の被
制御信号として入力されてそれぞれｒ信号およびｂ信号
により利得制御され、撮像信号処理回路３から出力され
るＹL信号との間で、差動増幅回路13によりホワイトバ
ランスのとれた色差信号Ｒ−ＹLを作成し、また、差動
増幅回路14によりホワイトバランスのとれた色差信号Ｂ
−ＹLを作成し、このＲ−ＹL信号、Ｂ−ＹL信号とＹ信
号とは記録信号処理回路15に入力されてFM変調などの処
理が行われ、記録回路16で記録媒体17に記録される。18
は記録回路16を駆動する駆動回路である。The R signal and the B signal output from the color signal separation circuit 4 are
Respectively gain controlled by respectively inputted r signal and b signals as the control signal R gain control circuit 8 and B gain control circuit 9, between the Y L signal output from the image signal processing circuit 3, a differential the amplifier circuit 13 creates a balanced color difference signals R-Y L of the white balance, also, by the differential amplifier circuit 14 of the white balanced color difference signals B
Create a -Y L, the R-Y L signal, processing such as B-Y L signal and is inputted FM modulated to a recording signal processing circuit 15 and the Y signal is performed, the recording medium 17 by the recording circuit 16 Be recorded. 18
Is a drive circuit for driving the recording circuit 16.
発明が解決しようとする課題 しかしながら上記のような構成の電子スチルカメラ装
置は、非ストロボ発光装置は、被写体にストロボ光のみ
照射される撮影では、ホワイトバランスのとれた、良好
な色再現性の保たれた撮影が可能であるが、被写体周囲
の光とストロボ光が混合された場合の撮影では、ホワイ
トバランスがとれず、特に色温度の低いハロゲン光と色
温度の高いストロボ光との混合の撮影では色再現性が著
しく劣化するという問題を有していた。However, in the electronic still camera device having the above-described configuration, the non-strobe light emitting device has a good white balance and good color reproducibility in photographing in which only the strobe light is irradiated to the subject. Although it is possible to shoot with a drop, it is not possible to achieve white balance when shooting the light around the subject and the strobe light, and especially to shoot a mixture of halogen light with a low color temperature and strobe light with a high color temperature. In this case, the color reproducibility was significantly deteriorated.
本発明はかかる問題を解決するもので、被写体の周囲
光とストロボ光が混合された光源下での撮影でも、ホワ
イトバランスのとれた、色再現性の良好な画質を得るこ
とができる電子スチルカメラ装置を提供することを目的
とするものである。The present invention solves such a problem, and an electronic still camera capable of obtaining an image with good white balance and good color reproducibility even when photographing under a light source in which ambient light and strobe light of a subject are mixed. It is intended to provide a device.
課題を解決するための手段 前記課題を解決するために、本発明の電子スチルカメ
ラ装置は、光センサまたは撮像素子を用いて、撮影する
被写体の周囲の色温度を検知する第１の手段と、ストロ
ボを発光し、ストロボ発光量を検知する第２の手段と、
撮像信号処理回路の色信号または輝度信号もしくは色信
号と輝度信号両方を利得制御して白い被写体を撮影した
ときの色差信号が零になるように自動的にホワイトバラ
ンスをとる第３の手段と、前記第１の手段より得られた
色温度検知信号により算出される前記第３の手段に対す
る利得制御信号を、前記第２の手段におけるストロボ発
光量に応じて補正する手段を備え、補正された利得制御
信号により前記色信号または輝度信号もしくは色信号と
輝度信号両方を利得制御して自動的にホワイトバランス
をとるように構成したものである。Means for Solving the Problems To solve the above problems, an electronic still camera device of the present invention uses an optical sensor or an image sensor to detect a color temperature around a subject to be photographed, Second means for emitting a strobe light and detecting a strobe light emission amount;
Third means for automatically controlling the color signal or the luminance signal of the image pickup signal processing circuit or gain control of both the color signal and the luminance signal to white balance so that the color difference signal when a white subject is photographed becomes zero; Means for correcting a gain control signal for the third means calculated based on the color temperature detection signal obtained from the first means in accordance with the amount of strobe light emitted by the second means; The color signal or the luminance signal or both the color signal and the luminance signal are gain-controlled by a control signal so that a white balance is automatically obtained.
作用 前記した構成により、被写体周囲の色温度を検出する
第１の手段より得られた信号で算出される、色信号また
は輝度信号もしくはこれら両方を利得制御する利得制御
信号で、ストロボの発光量に応じて補正するので、被写
体の周囲光とストロボ光が混合された光源下での撮影で
も、ホワイトバランスのとれた色再現性の良い画質が容
易に得られる利点がある。With the configuration described above, the gain control signal for controlling the gain of the color signal or the luminance signal or both of them is calculated based on the signal obtained by the first means for detecting the color temperature around the subject. Since the correction is made in accordance with the above, there is an advantage that an image quality with good color reproducibility with a white balance can be easily obtained even when photographing under a light source where ambient light and strobe light of the subject are mixed.
実施例 以下、本発明の一実施例について、図面を参照して説
明する。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の電子スチルカメラ装置の
ブロック図を示す。第１図において、１〜6,8〜11,13〜
18は基本的に従来例と同じ機能であるので、詳しい説明
を省略する。７は本実施例の色温度演算回路であり、第
２図におけるメモリ23が含まれており、被写体周囲の色
温度により算出される利得制御信号にストロボ発光によ
るストロボセンサ受光光量に応じた補正をかける回路で
ある。いま、光センサ６が受けた被写体周囲の色温度情
報によるｒ信号をｒ1とし、ｂ信号をｂ1とし、また、ス
トロボ10発光時における色温度演算回路７に内蔵された
不揮発性メモリに記憶されたｒ信号をｒ2とし、ｂ信号
をｒ2とする。ストロボセンサ11から出力される。スト
ロボが発光しないときの光量信号をＳ1とし、ストロボ
が発光したときの光量信号をＳ2とすると、 ΔＳ＝Ｓ2−Ｓ1 がストロボ発光によって増加した光量となる。そこで、
ｒ信号およびｂ信号を のように補正すれば、ｒ信号、ｂ信号を、被写体周囲の
色温度により算出される利得制御信号にストロボ発光に
よるストロボセンサ発光光量に応じた補正をかけた信号
として得ることができる。FIG. 1 is a block diagram of an electronic still camera device according to one embodiment of the present invention. In FIG. 1, 1-6,8-11,13-
18 has basically the same function as the conventional example, and a detailed description thereof will be omitted. Reference numeral 7 denotes a color temperature calculation circuit according to the present embodiment, which includes the memory 23 shown in FIG. It is a circuit to multiply. Now, the r signal based on the color temperature information around the object received by the optical sensor 6 is represented by r 1 , the b signal is represented by b 1, and stored in a nonvolatile memory incorporated in the color temperature calculation circuit 7 when the strobe 10 emits light. The obtained r signal is defined as r 2 and the b signal is defined as r 2 . Output from the strobe sensor 11. The light quantity signal when the flash does not fire and S 1, when the light quantity signal when the flash was discharged and S 2, the amount of light ΔS = S 2 -S 1 is increased by strobe lighting. Therefore,
r signal and b signal With such correction, the r signal and the b signal can be obtained as signals obtained by correcting the gain control signal calculated based on the color temperature around the subject in accordance with the amount of light emitted by the strobe sensor.
さらに、他の実施例として、ストロボ発光制御回路20
は、前記ストロボセンサ受光量のストロボ発光時と非発
光時との差ΔＳによりストロボ発光時間を算出し、スト
ロボ10にストロボ発光停止信号を出すまでの、ストロボ
発光時間を検知することにより、ｒ信号、ｂ信号に、ス
トロボ発光によるストロボセンサ受光量に応じた補正を
かけるようにしている。このときは、検知されたストロ
ボ発光時間をストロボ発光量検知信号に変換し、これを
色温度検知信号に加えることにより、目的を達成でき
る。Further, as another embodiment, a strobe light emission control circuit 20 is provided.
Calculates the strobe emission time from the difference ΔS between the strobe emission amount and the non-emission time of the strobe sensor light reception amount, and detects the strobe emission time until the strobe emission stop signal is issued to the strobe 10, thereby obtaining the r signal. , B signal is corrected in accordance with the amount of light received by the strobe sensor by strobe light emission. At this time, the object can be achieved by converting the detected strobe light emission time into a strobe light emission amount detection signal and adding this to the color temperature detection signal.
発明の効果 以上のように、本発明によれば、簡単な構成により、
被写体の周囲光とストロボ光が混合された光源下の影響
で、周囲光とストロボ光の光量バランスを自動的に検知
し、ホワイトバランスのとれた色再現の良い画質が容易
に得られ、その効果は極めて大きいものがある。As described above, according to the present invention, with a simple configuration,
Under the influence of the light source where the ambient light of the subject and the strobe light are mixed, the light amount balance of the ambient light and the strobe light is automatically detected, and the image quality with good white balance and good color reproduction can be easily obtained. Are extremely large.
第１図は本発明における電子スチルカメラ装置のブロッ
ク図、第２図は従来の電子スチルカメラ装置のブロック
図である。 ６……光センサ、７……色温度演算回路、８……Ｒ利得
制御回路、９……Ｂ利得制御回路、10……ストロボ、11
……ストロボセンサ、12……ストロボ発光制御回路。FIG. 1 is a block diagram of an electronic still camera device according to the present invention, and FIG. 2 is a block diagram of a conventional electronic still camera device. 6 ... optical sensor, 7 ... color temperature calculation circuit, 8 ... R gain control circuit, 9 ... B gain control circuit, 10 ... strobe, 11
…… Strobe sensor, 12… Strobe light emission control circuit.
Claims (2)
る被写体の周囲の色温度を検知する第１の手段と、スト
ロボを発光し、ストロボ発光量を検知する第２の手段
と、撮像信号処理回路の色信号または輝度信号もしくは
色信号と輝度信号両方を利得制御して白い被写体を撮影
したときの色差信号が零になるように自動的にホワイト
バランスをとる第３の手段と、前記第１の手段より得ら
れた色温度検知信号により算出される前記第３の手段に
対する利得制御信号を、前記第２の手段におけるストロ
ボ発光量に応じて補正する手段を備え、補正された利得
制御信号により前記色信号または輝度信号もしくは色信
号と輝度信号両方を利得制御して自動的にホワイトバラ
ンスをとるように構成した電子スチルカメラ装置。A first means for detecting a color temperature around a subject to be photographed by using an optical sensor or an image sensor; a second means for emitting a strobe light and detecting a strobe light emission amount; A third means for automatically white-balancing a color signal or a luminance signal or both of the color signal and the luminance signal of the processing circuit so that a color difference signal obtained when a white object is photographed becomes zero so as to become zero; Means for correcting a gain control signal for the third means calculated based on the color temperature detection signal obtained by the first means in accordance with the amount of strobe light emission in the second means, wherein the corrected gain control signal is provided. An electronic still camera device configured to automatically control a white balance by controlling the gain of the color signal or the luminance signal or both of the color signal and the luminance signal.
知し、この時間信号をストロボ発光量検知信号に変換し
て、第１の手段より得られる色温度検知信号に加えるこ
とを特徴とする請求項１記載の電子スチルカメラ装置。2. A strobe light emission time is detected by a second means, and this time signal is converted into a strobe light emission amount detection signal and added to a color temperature detection signal obtained by the first means. The electronic still camera device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1325196A JP2749405B2 (en) | 1989-12-15 | 1989-12-15 | Electronic still camera device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1325196A JP2749405B2 (en) | 1989-12-15 | 1989-12-15 | Electronic still camera device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03186088A JPH03186088A (en) | 1991-08-14 |
| JP2749405B2 true JP2749405B2 (en) | 1998-05-13 |
Family
ID=18174090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1325196A Expired - Lifetime JP2749405B2 (en) | 1989-12-15 | 1989-12-15 | Electronic still camera device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2749405B2 (en) |
-
1989
- 1989-12-15 JP JP1325196A patent/JP2749405B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03186088A (en) | 1991-08-14 |
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