JPH05167915A - Electronic image pickup device - Google Patents

Electronic image pickup device

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Publication number
JPH05167915A
JPH05167915A JP3352449A JP35244991A JPH05167915A JP H05167915 A JPH05167915 A JP H05167915A JP 3352449 A JP3352449 A JP 3352449A JP 35244991 A JP35244991 A JP 35244991A JP H05167915 A JPH05167915 A JP H05167915A
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JP
Japan
Prior art keywords
exposure
shutter speed
image pickup
image
lacking
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.)
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Application number
JP3352449A
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Japanese (ja)
Inventor
Daikichi Morohashi
橋 大 吉 師
Original Assignee
Olympus Optical Co Ltd
オリンパス光学工業株式会社
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Application filed by Olympus Optical Co Ltd, オリンパス光学工業株式会社 filed Critical Olympus Optical Co Ltd
Priority to JP3352449A priority Critical patent/JPH05167915A/en
Publication of JPH05167915A publication Critical patent/JPH05167915A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To obtain an uniform image having no exposure lack while reducing image jiggle by adjusting the gain of an image pickup system based upon the quantity of lacking exposure calculated in accordance with a difference between a shutter speed set up so as to prevent generation of exposure deviation and a shutter speed for obtaining proper exposure. CONSTITUTION:When a slow shutter speed is set up in order to prevent generation of exposure deviation, a system controller microcomputer 9 calculates the quantity of lacking exposure corresponding to the difference between the set shutter speed and a shutter speed for obtaining proper exposure which is obtained through an AE sensor 12. The microcomputer 9 increases the gain of a variable gain circuit 3 based upon the calculated result to compensate the quantity of lacking exposure. Thereby an uniform image having no exposure lack can be obtained while reducing image jiggle even at the time of an exposure deviation preventing mode.

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、電子的撮像装置に関
し、特に低照度連写撮影時のブレを軽減する電子的撮像
装置に関する。 【0002】 【従来の技術】電子カメラやムービーカメラ等によりス
トロボ光を使用せずに、またはストロボ光を使用してい
ても被写体が遠くてストロボ光が届かない条件で、被写
体を撮影する場合には、露出が不足するので絞りを開放
状態に設定して露出不足を補償するが、絞りを開放状態
にしても依然露出不足である場合には露出を適正化する
ためシャッター速度を遅くして長時間露出を行う必要が
ある。また、一定短時間間隔で連続的にシャッター動作
させて連続画像を記録する連写撮影時にも露出不足に対
応するためシャッター速度を遅くして長時間露光する必
要がある。 【0003】 【発明が解決しようとする課題】上述のように、従来の
電子的撮像装置は、低照度被写体の撮影時の露出不足は
シャッター速度を遅くすることにより対応しているが、
連写撮影時には、次のような問題が生ずる。 The following problems occur during continuous shooting. すなわち、 That is,
例えば、20コマ/秒の連写速度が設定された場合、被写体照度で定まるシャッター速度が連写速度より遅い場合、例えば1/15秒のとき、言い換えれば、連写1コマに割り当てられる時間よりも露光時間を長くとらなければ適正露出が得られないときには、設定された連写速度を優先させると露出不足となる。 For example, when the continuous shooting speed of 20 frames / second is set, the shutter speed determined by the subject illuminance is slower than the continuous shooting speed, for example, 1/15 second, in other words, from the time allocated to one continuous shooting frame. However, if proper exposure cannot be obtained unless the exposure time is long, prioritizing the set continuous shooting speed results in underexposure. 適正露出を得るには、連写速度を上記シャッター速度内に抑えなければならない。 In order to obtain proper exposure, the continuous shooting speed must be kept within the above shutter speed. 図4には、シャッター動作と得られる映像信号との関係が示されている。 FIG. 4 shows the relationship between the shutter operation and the obtained video signal. 1フィールドに相当する1/ 1 / corresponding to 1 field
60秒周期の垂直同期信号VSYNCに同期してシャッター動作する低照度条件での連写撮影において、露出優先動作時には、上述の例では適正な露光レベルを得るに必要なシャッター速度動作させるシャッター信号SHT In continuous shooting under low illuminance conditions where the shutter operates in synchronization with the vertical synchronization signal VSYNC with a cycle of 60 seconds, the shutter signal SHT that operates the shutter speed required to obtain an appropriate exposure level in the above example during exposure priority operation.
は4フィールド毎に出力され、この信号SHTによって適正露光レベルの映像信号Videoが得られる。 Is output every 4 fields, and a video signal Video with an appropriate exposure level can be obtained by this signal SHT. 一方、連写速度優先動作の場合には、上述の例では1/2 On the other hand, in the case of continuous shooting speed priority operation, 1/2 in the above example.
0秒が連写速度であり、したがって、シャッター信号S 0 seconds is the continuous shooting speed, and therefore the shutter signal S
HTは3フィールド毎に出力されることになり、得られる映像信号レベルは、適正露出レベルと比較して1/4 The HT will be output every 3 fields, and the obtained video signal level will be 1/4 of the proper exposure level.
だけ露出不足となる。 Only underexposed. 【0004】このように、低照度条件での高速連写撮影時、毎秒撮影コマ数が増加する(連写速度が増大する) As described above, during high-speed continuous shooting under low light conditions, the number of shot frames per second increases (the continuous shooting speed increases).
と、適正露出を得るためにはシャッター速度を遅くして長時間露光しなければならないため、必要なコマ数を維持できなくなる。 Then, in order to obtain proper exposure, the shutter speed must be slowed down and exposure must be performed for a long time, so that the required number of frames cannot be maintained. このとき、被写体ブレや手ブレに起因するブレ現象を防止するため、シャッター速度優先動作させると適正露出を得るためには連写速度に限界が生ずる。 At this time, in order to prevent a blur phenomenon caused by subject blur and camera shake, if the shutter speed priority operation is performed, there is a limit to the continuous shooting speed in order to obtain an appropriate exposure. また、連写速度優先動作では、シャッター速度が制限されて露出不足となり、撮影画像が暗く沈んでしまう。 Further, in the continuous shooting speed priority operation, the shutter speed is limited and the exposure becomes insufficient, so that the captured image becomes dark and sinks. すなわち、連写時の被写体としては、通常、動体が主となるが、低照度条件においては適正露出を得るためにシャッター速度を遅くして長時間露光で対応している。 That is, a moving object is usually the main subject during continuous shooting, but under low illuminance conditions, the shutter speed is slowed down to obtain a proper exposure, and a long exposure is used. しかし、動体を長時間露光すると、画像にブレを生ずる。 However, when a moving object is exposed for a long time, the image is blurred. また、静止物体を撮影する場合も長時間露光によってブレが生ずる。 Also, when shooting a stationary object, blurring occurs due to long exposure. 【0005】そこで、本発明の目的は、低照度撮影時の記録画像のブレを軽減しつつ、露光不足の問題を解決するとともに、均一な撮影画像を得る電子的撮像装置を提供することにある。 Therefore, an object of the present invention is to provide an electronic imaging device that solves the problem of underexposure and obtains a uniform photographed image while reducing blurring of a recorded image during low-light photography. .. 【0006】 【課題を解決するための手段】前述の課題を解決するため、本発明による電子的撮像装置は、撮影画像のブレの発生を防止すべく設定された比較的高速の第1のシャッタ速度を認識するための第1の手段と、当該撮影条件の下で適正露光量を得るために必要とされる第2のシャッタ速度と上記第1のシャッタ速度との差に係る不足露光量を認識するための第2の手段と、上記第2の手段の手段により認識された不足露光量に対応して当該撮像系の利得を設定するための第3の手段と、を備えて構成される。 Means for Solving the Problems In order to solve the above-mentioned problems, the electronic image pickup apparatus according to the present invention has a relatively high-speed first shutter set to prevent blurring of a captured image. The first means for recognizing the speed and the underexposure amount related to the difference between the second shutter speed and the first shutter speed required to obtain an appropriate exposure amount under the shooting conditions. It is configured to include a second means for recognizing and a third means for setting the gain of the imaging system in response to the underexposure amount recognized by the means of the second means. .. 【0007】 【作用】本発明では、画像ブレを防止するように設定されたシャッター速度と適正露光量を得るために必要とされるシャッター速度との差異(差や比等で表現され得る)に対応する不足露光量を求め、この不足露光量に基づいて撮像系のゲインを調整して露光不足を補償して記録画像ブレを軽減しつつ適正な露出を得ている。 In the present invention, the difference between the shutter speed set to prevent image blurring and the shutter speed required to obtain an appropriate exposure amount (which can be expressed by a difference, a ratio, etc.) The corresponding underexposure amount is obtained, and the gain of the imaging system is adjusted based on this underexposure amount to compensate for the underexposure and obtain an appropriate exposure while reducing the blurring of the recorded image. 【0008】 【実施例】次に、本発明について図面を参照しながら説明する。 Next, the present invention will be described with reference to the drawings. 図1は本発明による電子的撮像装置の一実施例を示す構成ブロック図である。 FIG. 1 is a block diagram showing an embodiment of an electronic imaging device according to the present invention. 絞り1を通って撮像素子(CCDイメージャ)2上に被写体像が結像される。 A subject image is formed on the image sensor (CCD imager) 2 through the diaphragm 1. C
CD2により得られた電気信号は、可変ゲイン回路3で信号レベルが調整された後、撮像プロセス回路4でY/ The electric signal obtained by the CD2 is Y / in the imaging process circuit 4 after the signal level is adjusted by the variable gain circuit 3.
C分離等の所定の信号処理が施される。 Predetermined signal processing such as C separation is performed. 撮像プロセス回路4からのY(輝度)信号とC(色)信号は、FM変調回路5でFM変調され、記録増幅回路6で増幅され、ヘッド7を介して記録媒体8に記録される。 The Y (luminance) signal and the C (color) signal from the image pickup process circuit 4 are FM-modulated by the FM modulation circuit 5, amplified by the recording amplifier circuit 6, and recorded on the recording medium 8 via the head 7. システムコントローラ(マイコン)9は、本装置を全体的に制御する回路で、絞り駆動回路11に絞り制御信号を送出して絞り1の開口径を制御し、ゲイン設定信号により可変ゲイン回路3のゲインを制御し、電子シャッター速度制御信号によりCCD駆動回路10を介して撮像素子2の素子シャッター速度を制御する。 The system controller (microcomputer) 9 is a circuit that controls the present apparatus as a whole, sends a diaphragm control signal to the diaphragm drive circuit 11 to control the aperture diameter of the diaphragm 1, and gains the variable gain circuit 3 by a gain setting signal. Is controlled, and the element shutter speed of the image pickup element 2 is controlled via the CCD drive circuit 10 by the electronic shutter speed control signal. 【0009】AEセンサ12は、被写体の照度情報を得るための測光センサであり、得られた照度情報はAEプロセス回路13で電流電圧変換及び対数圧縮等の処理が施されてシステムコントローラ9に送出される。 The AE sensor 12 is a photometric sensor for obtaining illuminance information of a subject, and the obtained illuminance information is subjected to processing such as current-voltage conversion and logarithmic compression in the AE process circuit 13 and sent to the system controller 9. Will be done. システムコントローラ9は、AEセンサ12からの照度情報等に基づいて、絞り1の絞り,可変ゲイン回路3のゲイン等を制御する。 The system controller 9 controls the diaphragm of the diaphragm 1, the gain of the variable gain circuit 3, and the like based on the illuminance information and the like from the AE sensor 12. また、トリガスイッチ15により記録指令が、外部スイッチ14によりシャッター速度、絞り等がシステムコントローラ9に指示される。 Further, a recording command is instructed by the trigger switch 15 and a shutter speed, aperture and the like are instructed by the external switch 14 to the system controller 9. 【0010】次に、暗いシーン(低照度被写体)の特に動体を撮影する場合、ストロボ光を使用しない条件下、 Next, when shooting a moving object, especially in a dark scene (low-light subject), under the condition that the strobe light is not used.
または被写体が遠距離に位置しストロボ光による露光量上昇が殆どない条件下、外界光のみで撮影する場合の本実施例の動作を連写モード動作を一例として説明する。 Alternatively, the operation of this embodiment in the case where the subject is located at a long distance and the exposure amount is hardly increased by the strobe light and only the outside light is used will be described by taking the continuous shooting mode operation as an example.
外部スイッチ14によりシャッター速度が設定され、トリガスイッチ15によって記録開始指令がシステムコントローラ9に入力されると、システムコントローラ9 When the shutter speed is set by the external switch 14 and the recording start command is input to the system controller 9 by the trigger switch 15, the system controller 9
は、AEセンサ12とAEプロセス回路13からの照度情報を受け、システムコントローラ9に内蔵のROMに格納されているプログラム線図のテーブルを参照して、 Receives the illuminance information from the AE sensor 12 and the AE process circuit 13, and refers to the program diagram table stored in the ROM built in the system controller 9.
絞りを開放状態にしたときに適正露出を得ることができるシャッター速度を求める。 Find the shutter speed at which proper exposure can be obtained when the aperture is opened. また、使用者により絞り値が絞り側に優先的に設定されている場合は、その絞り値での適正露出が得られるシャッター速度を求める。 Further, when the aperture value is preferentially set on the aperture side by the user, the shutter speed at which the appropriate exposure at the aperture value can be obtained is obtained. 【0011】図2には、3枚のターレット絞りを用いたときのプログラム線図が示されている。 FIG. 2 shows a program diagram when three turret diaphragms are used. 図中、太線はフルオート撮影での設定で、F11,1/2000sec In the figure, the thick line is the setting for full-auto shooting, F11, 1/2000 sec.
はスメア限界による制限を、F2.8,1/30sec Is limited by the smear limit, F2.8, 1/30 sec
は手振れ限界による制限である。 Is a limitation due to the camera shake limit. フルオート撮影以外の動作時(つまり、シャッター速度、絞り、連写速度等が優先的に設定されている場合)には、実線部外のテーブル参照が行われる。 During operations other than full-auto shooting (that is, when the shutter speed, aperture, continuous shooting speed, etc. are set with priority), the table outside the solid line is referenced. 例えば、照度情報が7EVで、絞りを開放(F2.8)に制御して撮影する場合には、シャッター速度は1/15secとなる。 For example, when the illuminance information is 7 EV and the aperture is controlled to open (F2.8) for shooting, the shutter speed is 1/15 sec. また、連写速度が30コマ/秒に設定されている場合には、1回の撮影にかけられる時間は1/30secとなる。 Further, when the continuous shooting speed is set to 30 frames / sec, the time taken for one shooting is 1/30 sec. このとき、シャッター速度は速すぎて露光時間が約1/2不足してしまう。 At this time, the shutter speed is too fast and the exposure time is insufficient by about 1/2. ここで、システムコントローラ9は、シャッター速度を1/15secから1/30secに変更し、シャッター速度比1/15/1/30=2を求める。 Here, the system controller 9 changes the shutter speed from 1/15 sec to 1/30 sec and obtains a shutter speed ratio of 1/15/1/30 = 2. この係数は、適正露出を得るための増幅係数として用いる。 This coefficient is used as an amplification coefficient for obtaining proper exposure. 【0012】システムコントローラ9は、求めたシャッター速度でCCD2を駆動し、1/30秒のシャッター動作を行わせるとともに、可変ゲイン回路3に2倍の増幅を行わせるためのゲイン制御信号を出力する。 The system controller 9 drives the CCD 2 at the obtained shutter speed to perform a shutter operation for 1/30 second, and outputs a gain control signal for causing the variable gain circuit 3 to perform double amplification. .. こうして、可変ゲイン回路3によってCCD2のシャッター速度の高速化に伴う露光不足を補償して適正レベルの映像信号を得ている。 In this way, the variable gain circuit 3 compensates for the underexposure due to the increase in the shutter speed of the CCD 2 and obtains an appropriate level video signal. 【0013】図3には、上記実施例動作の処理手順を示すフローチャートが示されている。 FIG. 3 shows a flowchart showing a processing procedure of the above-described operation. 先ず、低照度連写速度モードであるか否かが判定され(ステップS1)、低照度連写モードであるときには、シャッター速度優先に設定されているか否かが判定される(ステップS2)。 First, it is determined whether or not the mode is the low illuminance continuous shooting speed mode (step S1), and when the low illuminance continuous shooting mode is set, it is determined whether or not the shutter speed is prioritized (step S2).
シャッター速度優先に設定されているときには、シャッター速度S(秒)を設定し、シャッター速度コードTV When the shutter speed priority is set, the shutter speed S (seconds) is set and the shutter speed code TV
1とし(ステップS3)、照度情報L(EV)を入力する(ステップS4)。 Set to 1 (step S3), and input the illuminance information L (EV) (step S4). 次に、Lが12(EV)より小さいか否かが判定され(ステップS5)、小さいときには絞り制御してF=2.8に設定し(ステップS6)、上記プログラムテーブルを参照して適正シャッター速度コードTV2を求める(ステップS7)。 Next, it is determined whether or not L is smaller than 12 (EV) (step S5), and if it is smaller, the aperture is controlled to set F = 2.8 (step S6), and the appropriate shutter is set with reference to the above program table. The speed code TV2 is obtained (step S7). 続いて、適正シャッター速度コードTV2と設定シャッター速度コードTV1との露出差をTV1−TV2(EV)として求め(ステップS8)、可変ゲイン回路3のゲインGAIN Subsequently, the exposure difference between the appropriate shutter speed code TV2 and the set shutter speed code TV1 is obtained as TV1-TV2 (EV) (step S8), and the gain GAIN of the variable gain circuit 3 is obtained.
を、GAIN=2 (TV1-TV2)として求める(ステップS Is calculated as GAIN = 2 (TV1-TV2) (step S ).
9)。 9). ステップS1において、低照度連写モードでないと判定されると、通常撮影シーケンス動作に移り(ステップS10)、処理を終了する。 If it is determined in step S1 that the mode is not the low illuminance continuous shooting mode, the normal shooting sequence operation is started (step S10), and the process is terminated. また、ステップS2においてシャッター速度優先でないとき及びステップS5 Further, when the shutter speed is not prioritized in step S2 and in step S5.
においてLが12より小さくないときにはフルオートプログラムテーブルを参照する連写動作に入り(ステップS11)、処理を終了する。 When L is not smaller than 12, the continuous shooting operation referring to the fully automatic program table is started (step S11), and the process is finished. 【0014】以上のような実施例によれば、低照度被写体の連写撮影時、長時間露光が必要となり、所要シャッター速度が連写速度よりも遅くなった場合であっても、 According to the above embodiment, even when a long exposure is required during continuous shooting of a low-light subject and the required shutter speed is slower than the continuous shooting speed.
設定された連写速度での撮影が可能となり、狙いとする被写体の時間的変化を細かく撮影可能となる。 It is possible to shoot at the set continuous shooting speed, and it is possible to shoot finely the temporal changes of the target subject. また、連写撮影時、シャッター速度や可変ゲイン回路のゲインを連写撮影開始時に設定、ホールドするので連写撮影で得られた各コマ画像の露出差が少なく、各コマ画像のS/ In addition, during continuous shooting, the shutter speed and the gain of the variable gain circuit are set and held at the start of continuous shooting, so the exposure difference of each frame image obtained in continuous shooting is small, and the S / of each frame image
Nが一定に維持されて画像が見やすくなる。 N is kept constant and the image becomes easier to see. 更に、絞りを小絞りにしても使えるため、フォーカスずれによるボケを小さくできる。 Furthermore, since it can be used even if the aperture is set to a small aperture, blurring due to focus shift can be reduced. 【0015】以上の実施例の説明では、予め複数個の径の異なる開口部を板状部材に設け、この開口部を選択して光量調節を行うターレット絞りを用いた不連続な絞り制御について説明しているが、連続的絞り制御であっても良い。 In the above description of the embodiment, a discontinuous diaphragm control using a turret diaphragm in which a plurality of openings having different diameters are previously provided in the plate-shaped member and the light amount is adjusted by selecting the openings will be described. However, continuous aperture control may be used. また、ゲインを調整する可変ゲイン回路3の機能は、CCD等の光電変換部から記録回路系までの任意部に挿入できる。 Further, the function of the variable gain circuit 3 for adjusting the gain can be inserted into an arbitrary part from the photoelectric conversion part such as a CCD to the recording circuit system. この場合、非線形特性を有する回路部よりも前段に設けることが望ましい。 In this case, it is desirable to provide it in front of the circuit unit having non-linear characteristics. 更に、シャッター速度やゲインを求めるのには、プログラム線図テーブル参照によらず、演算によって求めることができる。 Further, the shutter speed and the gain can be obtained by calculation without referring to the program diagram table. プログラム線図テーブルは、システムコントローラ9内のR The program diagram table is R in the system controller 9.
OMに格納されずに、例えばICカード等を用いて外部から当該情報が供給されていても良い。 The information may be supplied from the outside using, for example, an IC card without being stored in the OM. 以上の実施例の説明で用いられたシャッター速度とはCCD等の光電変換部の光電荷蓄積時間、あるいは機械的、電気光学的な光透過量調節手段による光束透過時間等に適用され得る。 The shutter speed used in the above description of the embodiment can be applied to the light charge accumulation time of a photoelectric conversion unit such as a CCD, or the light flux transmission time by a mechanical or electro-optical light transmission amount adjusting means. 【0016】 【発明の効果】以上説明したように、本発明による電子的撮像装置は、記録画像ブレを防止するように設定されたシャッター速度と適正露光量を得るために必要とされるシャッター速度との差異(差や比等で表現され得る) As described above, the electronic imaging apparatus according to the present invention has a shutter speed set to prevent blurring of recorded images and a shutter speed required to obtain an appropriate exposure amount. Difference from (can be expressed by difference, ratio, etc.)
に対応する不足露光量を撮像系のゲインを調整することにより補償しているので、設定されたシャッター速度を維持してブレを軽減しつつ適正な露出を得る時間精度、 Since the underexposure amount corresponding to is compensated by adjusting the gain of the imaging system, the time accuracy to obtain an appropriate exposure while maintaining the set shutter speed and reducing blurring,
露出精度に優れた連写撮影が行える。 Continuous shooting with excellent exposure accuracy can be performed. Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic image pickup apparatus, and more particularly to an electronic image pickup apparatus which reduces blur during continuous shooting with low illuminance. 2. Description of the Related Art When shooting a subject without using strobe light with an electronic camera, movie camera or the like, or under the condition that the subject is far and strobe light does not reach even if strobe light is used. Is underexposed, the aperture is set to open to compensate for the underexposure, but if the exposure is still underexposure even if the aperture is open, the shutter speed should be slowed down to optimize the exposure. Need to do time exposure. Further, even during continuous shooting in which the shutter is continuously operated at a constant short time interval to record continuous images, it is necessary to reduce the shutter speed and perform long-time exposure in order to c Description: BACKGROUND OF THE tetrahydrofuran 1. Field of the Invention The present invention relates to an electronic image pickup apparatus, and more particularly to an electronic image pickup apparatus which reduces blur during continuous shooting with low illuminance. 2. Description of the Related Art When shooting a subject without using strobe light with an electronic camera, movie camera or the like, or under the condition that the subject is far and strobe light does not reach even if strobe light is used. Is underexposed, the aperture is set to open to compensate for the underexposure, but if the exposure is still underexposure even if the aperture is open, the shutter speed should be slowed down to optimize the exposure. Need to do time exposure. Further, even during continuous shooting in which the shutter is continuously operated at a constant short time interval to record continuous images, it is necessary to reduce the shutter speed and perform long-time exposure in order to c ope with insufficient exposure. As described above, in the conventional electronic image pickup apparatus, the insufficient exposure at the time of photographing a low-illuminance subject is dealt with by slowing the shutter speed. ope with insufficient exposure. As described above, in the conventional electronic image pickup apparatus, the insufficient exposure at the time of photographing a low-illuminance subject is dealt with by slowing the shutter speed.
The following problems occur during continuous shooting. That is, The following problems occur during continuous shooting. That is,
For example, when a continuous shooting speed of 20 frames / second is set, when the shutter speed determined by the subject illuminance is slower than the continuous shooting speed, for example, 1/15 seconds, in other words, from the time assigned to one continuous shooting frame. Also, when the proper exposure cannot be obtained unless the exposure time is long, the exposure becomes insufficient when the set continuous shooting speed is prioritized. To obtain proper exposure, the continuous shooting speed must be kept within the above shutter speed. FIG. 4 shows the relationship between the shutter operation and the obtained video signal. 1 / corresponding to one field For example, when a continuous shooting speed of 20 frames / second is set, when the shutter speed determined by the subject illuminance is slower than the continuous shooting speed, for example, 1/15 seconds, in other words, from the time assigned to To obtain proper exposure, the continuous shooting speed must be kept within the above shutter. Also, when the proper exposure cannot be obtained unless the exposure time is long, the exposure becomes insufficient when the set continuous shooting speed is prioritized. speed. FIG. 4 shows the relationship between the shutter operation and the obtained video signal. 1 / corresponding to one field
In continuous shooting under a low illuminance condition in which the shutter operates in synchronization with the vertical synchronization signal VSYNC having a cycle of 60 seconds, during the exposure priority operation, the shutter signal SHT for operating the shutter speed required to obtain an appropriate exposure level in the above example. In continuous shooting under a low illuminance condition in which the shutter operates in synchronization with the vertical synchronization signal VSYNC having a cycle of 60 seconds, during the exposure priority operation, the shutter signal SHT for operating the shutter speed required to obtain an appropriate exposure level in the above example.
Are output for every four fields, and a video signal Video having an appropriate exposure level is obtained by this signal SHT. On the other hand, in the case of the continuous shooting speed priority operation, it is 1/2 in the above example. Are output for every four fields, and a video signal Video having an appropriate exposure level is obtained by this signal SHT. On the other hand, in the case of the continuous shooting speed priority operation, it is 1/2 in the above example.
0 second is the continuous shooting speed, and therefore the shutter signal S 0 second is the continuous shooting speed, and therefore the shutter signal S
The HT is output every three fields, and the obtained video signal level is 1/4 compared with the proper exposure level. The HT is output every three fields, and the obtained video signal level is 1/4 compared with the proper exposure level.
Only underexposed. Thus, during high-speed continuous shooting under low illumination conditions, the number of frames taken per second increases (the continuous shooting speed increases). Only underexposed. Thus, during high-speed continuous shooting under low illumination conditions, the number of frames taken per second increases (the continuous shooting speed increases).
Then, in order to obtain a proper exposure, it is necessary to slow down the shutter speed and perform exposure for a long time, so that the required number of frames cannot be maintained. At this time, if a shutter speed priority operation is performed in order to prevent a blurring phenomenon caused by subject blurring or camera shake, the continuous shooting speed is limited in order to obtain proper exposure. Further, in the continuous shooting speed priority operation, the shutter speed is limited, resulting in underexposure, and the captured image is darkened. That is, a moving subject is usually the main subject during continuous shooting, but under low illuminance conditions, the shutter speed is slowed down to obtain a proper exposure, and long exposure is used. However, when a moving object is exposed for a long time, the image is blurred. Also, when a still object is photographed, blurring occurs due to long-time exposure. Therefore, an object of the present invention is to Then, in order to obtain a proper exposure, it is necessary to slow down the shutter speed and perform exposure for a long time, so that the required number of frames cannot be maintained. At this time, if a shutter speed priority operation is performed in order to prevent a blurring phenomenon caused by subject blurring or camera shake, the continuous shooting speed is limited in order to obtain proper exposure. Further, in the continuous shooting speed priority operation, the shutter speed is limited, resulting in underexposure, and the That is, a moving subject is usually the main subject during continuous shooting, but under low illuminance conditions, the shutter speed is slowed down to obtain a proper exposure, and long exposure is used. However, when a moving object is exposed for a long time, the image is blurred. Also, when a still object is photographed, blurring occurs due to long-time exposure. Therefore, an object of the present invention is to provide an electronic image pickup apparatus which can solve the problem of underexposure while reducing the blurring of a recorded image at the time of photographing with low illuminance and obtain a uniform photographed image. .. In order to solve the above-mentioned problems, the electronic image pickup apparatus according to the present invention has a relatively high-speed first shutter set to prevent the occurrence of blurring of a captured image. A first means for recognizing the speed and an underexposure amount related to a difference between the second shutter speed and the first shutter speed required to obtain an appropriate exposure amount under the photographing condition are calculated. It comprises a second means for recognizing, and a third means for setting the gain of the imaging system in correspondence with the underexposure amount recognized by the means of the second means. .. According to the present invention, the difference between the shutter speed set so as provide an electronic image pickup apparatus which can solve the problem of underexposure while reducing the blurring of a recorded image at the time of photographing with low illuminance and obtain a uniform photographed image. .. In order to solve the above-mentioned problems, the electronic image pickup apparatus according to the present invention has a relatively high-speed first shutter set to prevent the occurrence of blurring of a captured image. A first means for recognizing the speed and an underexposure amount related to a difference between the second shutter speed and the first shutter speed required to obtain an appropriate exposure amount under the imaging condition are calculated. It is a second means for recognizing, and a third means for setting the gain of the imaging system in correspondence with the underexposure amount recognized by the means of the second means. .. According to the present invention, the difference between the shutter speed set so as to prevent the image blur and the shutter speed required to obtain an appropriate exposure amount (which can be expressed by a difference or a ratio). The corresponding underexposure amount is obtained, and the gain of the image pickup system is adjusted based on the underexposure amount to compensate for the underexposure to reduce the blur of the recorded image and obtain the proper exposure. Next, the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of an electronic image pickup apparatus according to the present invention. A subject image is formed on the image sensor (CCD imager) 2 through the diaphragm 1. C The corresponding underexposure amount is obtained, and the gain of the image pickup system is adjusted based on the underexposure. To prevent the image blur and the shutter speed required to obtain an appropriate exposure amount (which can be expressed by a difference or a ratio). amount to compensate for the underexposure to reduce the blur of the recorded image and obtain the proper exposure. Next, the present invention will be described with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of an electronic image pickup apparatus according to the present invention. A subject image is formed on the image sensor (CCD imager) 2 through the diaphragm 1. C
After the signal level of the electric signal obtained by the CD 2 is adjusted by the variable gain circuit 3, Y / After the signal level of the electric signal obtained by the CD 2 is adjusted by the variable gain circuit 3, Y /
Predetermined signal processing such as C separation is performed. The Y (luminance) signal and the C (color) signal from the imaging process circuit 4 are FM-modulated by the FM modulation circuit 5, amplified by the recording amplification circuit 6, and recorded on the recording medium 8 via the head 7. The system controller (microcomputer) 9 is a circuit that controls the entire apparatus, and sends an aperture control signal to the aperture drive circuit 11 to control the aperture diameter of the aperture 1 and a gain setting signal to adjust the gain of the variable gain circuit 3. The electronic shutter speed control signal controls the element shutter speed of the image pickup element 2 via the CCD drive circuit 10. The AE sensor 12 is a photometric sensor for obtaining illuminance information of a subject, and the obtained illuminance information is sent to the system controller 9 after being subjected to processing such as current-voltage conversion and logarithmic compressio Predetermined signal processing such as C separation is performed. The Y (luminance) signal and the C (color) signal from the imaging process circuit 4 are FM-modulated by the FM modulation circuit 5, amplified by the recording amplification circuit 6, and recorded on the recording medium 8 via the head 7. The system controller (microcomputer) 9 is a circuit that controls the entire amplifier, and sends an aperture control signal to the aperture drive circuit 11 to control the aperture diameter of the aperture 1 and a gain setting signal to adjust the gain of the variable gain circuit 3. The electronic shutter speed control signal controls the element shutter speed of the image pickup element 2 via the CCD drive circuit 10. The AE sensor 12 is a photometric sensor for obtaining illuminance information of a subject, and the obtained illuminance information is sent to the system controller 9 after being subjected to processing such as current-voltage conversion and logarithmic compressio n in the AE process circuit 13. To be done. The system controller 9 controls the aperture of the aperture 1 and the gain of the variable gain circuit 3 based on the illuminance information from the AE sensor 12. Further, the trigger switch 15 instructs the recording command, and the external switch 14 instructs the system controller 9 about the shutter speed, the aperture, and the like. Next, especially when shooting a moving object in a dark scene (low illuminance subject), under the condition that strobe light is not used, n in the AE process circuit 13. To be done. The system controller 9 controls the aperture of the aperture 1 and the gain of the variable gain circuit 3 based on the illuminance information from the AE sensor 12. Further, the trigger switch 15 instructions The recording command, and the external switch 14 instructs the system controller 9 about the shutter speed, the aperture, and the like. Next, especially when shooting a moving object in a dark scene (low illuminance subject), under the condition that strobe light is not used,
Alternatively, the operation of the present embodiment in the case of shooting with only the external light under the condition that the subject is located at a long distance and the exposure amount due to the strobe light hardly increases will be described by taking the continuous shooting mode operation as an example. Alternatively, the operation of the present embodiment in the case of shooting with only the external light under the condition that the subject is located at a long distance and the exposure amount due to the strobe light hardly increases will be described by taking the continuous shooting mode operation as an example.
When the shutter speed is set by the external switch 14 and the recording start command is input to the system controller 9 by the trigger switch 15, the system controller 9 When the shutter speed is set by the external switch 14 and the recording start command is input to the system controller 9 by the trigger switch 15, the system controller 9
Receives the illuminance information from the AE sensor 12 and the AE process circuit 13, and refers to the table of the program diagram stored in the ROM incorporated in the system controller 9, Receives the illuminance information from the AE sensor 12 and the AE process circuit 13, and refers to the table of the program diagram stored in the ROM incorporated in the system controller 9,
Find the shutter speed that can obtain the proper exposure when the aperture is opened. If the aperture value is preferentially set to the aperture side by the user, the shutter speed that obtains the proper exposure at the aperture value is obtained. FIG. 2 shows a program diagram when three turret diaphragms are used. In the figure, the thick line is the setting for full auto shooting, F11, 1 / 2000sec. Find the shutter speed that can obtain the proper exposure when the aperture is opened. If the aperture value is preferentially set to the aperture side by the user, the shutter speed that obtains the proper exposure at the aperture value is obtained. FIG. 2 shows a program diagram when three turret diaphragms are used. In the figure, the thick line is the setting for full auto shooting, F11, 1 / 2000sec.
Is limited by smear limit, F2.8, 1 / 30sec Is limited by smear limit, F2.8, 1 / 30sec
Is the limit due to the shake limit. During operations other than full-auto shooting (that is, when shutter speed, aperture, continuous shooting speed, etc. are preferentially set), a table outside the solid line is referred to. For example, when the illuminance information is 7 EV and the aperture is controlled to open (F2.8) to shoot, the shutter speed is 1/15 sec. Further, when the continuous shooting speed is set to 30 frames / second, the time taken for one shooting is 1/30 sec. At this time, the shutter speed is too fast, and the exposure time is reduced by about 1/2. Here, the system controller 9 changes the shutter speed from 1/15 sec to 1/30 sec, and obtains the shutter speed ratio 1/15/1/30 = 2. This coefficient is used as an amplification coefficient for obtaining proper exposure. The system controller 9 drives the CCD 2 at the calculated shutter speed to perform a shutter operation for 1/30 second and outputs a gain control signal for causing the variable gain circuit 3 to Is the limit due to the shake limit. During operations other than full-auto shooting (that is, when shutter speed, aperture, continuous shooting speed, etc. are preferentially set), a table outside the solid line is referred to. For example , when the illuminance information is 7 EV and the aperture is controlled to open (F2.8) to shoot, the shutter speed is 1/15 sec. Further, when the continuous shooting speed is set to 30 frames / second, the time taken for one shooting is 1/30 sec. At this time, the shutter speed is too fast, and the exposure time is reduced by about 1/2. Here, the system controller 9 changes the shutter speed from 1/15 sec to 1 / 30 sec, and obtains the shutter speed ratio 1/15/1/30 = 2. This coefficient is used as an amplification coefficient for obtaining proper exposure. The system controller 9 drives the CCD 2 at the calculated shutter speed to perform a shutter operation for 1/30 second and outputs a gain control signal for causing the variable gain circuit 3 to perform double amplification. .. In this way, the variable gain circuit 3 compensates for the insufficient exposure due to the increase in the shutter speed of the CCD 2 to obtain the video signal of an appropriate level. FIG. 3 is a flow chart showing the processing procedure of the operation of the above embodiment. First, it is determined whether or not the low illuminance continuous shooting mode is set (step S1), and when the low illuminance continuous shooting mode is set, it is determined whether or not the shutter speed priority is set (step S2). perform double amplification. .. In this way, the variable gain circuit 3 compensates for the insufficient exposure due to the increase in the shutter speed of the CCD 2 to obtain the video signal of an appropriate level. FIG. 3 is a flow chart showing First, it is determined whether or not the low illuminance continuous shooting mode is set (step S1), and when the low illuminance continuous shooting mode is set, it is determined whether or not the processing procedure of the operation of the above embodiment. shutter speed priority is set (step S2).
When the shutter speed priority is set, the shutter speed S (second) is set, and the shutter speed code TV When the shutter speed priority is set, the shutter speed S (second) is set, and the shutter speed code TV
It is set to 1 (step S3), and illuminance information L (EV) is input (step S4). Next, it is determined whether or not L is smaller than 12 (EV) (step S5). When it is smaller, aperture control is performed to set F = 2.8 (step S6), and the appropriate shutter is referred to by referring to the program table. The speed code TV2 is obtained (step S7). Subsequently, the exposure difference between the proper shutter speed code TV2 and the set shutter speed code TV1 is obtained as TV1-TV2 (EV) (step S8), and the gain GAIN of the variable gain circuit 3 is obtained. It is set to 1 (step S3), and illuminance information L (EV) is input (step S4). Next, it is determined whether or not L is smaller than 12 (EV) (step S5). When it is smaller, aperture control is performed to set F = 2.8 (step S6), and the appropriate shutter is referred to by referring to the program table. The speed code TV2 is obtained (step S7). Thus, the exposure difference between the proper shutter speed code TV2 and the set shutter speed code TV1 is obtained as TV1-TV2 (EV) (step S8), and the gain GAIN of the variable gain circuit 3 is obtained.
Is calculated as GAIN = 2 (TV1-TV2) (step S Is calculated as GAIN = 2 (TV1-TV2) (step S
9). If it is determined in step S1 that the low-illuminance continuous shooting mode is not set, the normal shooting sequence operation is performed (step S10), and the process ends. When the shutter speed is not prioritized in step S2, and when step S5 9). If it is determined in step S1 that the low-illuminance continuous shooting mode is not set, the normal shooting sequence operation is performed (step S10), and the process ends. When the shutter speed is not prioritized in step S2, and when step S5
When L is not smaller than 12, the continuous shooting operation referring to the fully automatic program table is started (step S11), and the process is ended. According to the above embodiment, long exposure is required for continuous shooting of a low-illuminance subject, and even if the required shutter speed is slower than the continuous shooting speed, When L is not smaller than 12, the continuous shooting operation referring to the fully automatic program table is started (step S11), and the process is ended. According to the above embodiment, long exposure is required for continuous shooting of a low-illuminance subject, and even if the required shutter speed is slower than the continuous shooting speed,
It is possible to shoot at the set continuous shooting speed, and it is possible to shoot in detail the temporal changes of the target subject. Also, during continuous shooting, the shutter speed and the gain of the variable gain circuit are set and held at the start of continuous shooting, so there is little exposure difference between the individual frame images obtained by continuous shooting, and the S / It is possible to shoot at the set continuous shooting speed, and it is possible to shoot in detail the temporal changes of the target subject. Also, during continuous shooting, the shutter speed and the gain of the variable gain circuit are set and held at the start of continuous shooting, so there is little exposure difference between the individual frame images obtained by continuous shooting, and the S /
N is kept constant and the image becomes easy to see. Furthermore, since it can be used even if the aperture is small, blurring due to focus shift can be reduced. In the above description of the embodiments, a plurality of apertures having different diameters are provided in the plate member in advance, and the discontinuous aperture control using the turret aperture for adjusting the light amount by selecting the apertures is explained. However, continuous diaphragm control may be used. Further, the function of the variable gain circuit 3 for adjusting the gain can be inserted in an arbitrary part from the photoelectric conversion part such as CCD to the recording circuit system. In this case, it is desirable to provide it before the circuit section having the nonlinear characteristic. Further, the shutter speed and the gain can be calculated not by referring to the program diagram table but by calculation. The program diagram table is R in the system controller 9. N is kept constant and the image becomes easy to see. Furthermore, since it can be used even if the aperture is small, blurring due to focus shift can be reduced. In the above description of the embodiments, a plurality of apertures having different diameters are provided in the plate member in advance, and the discontinuous aperture control using the turret aperture for adjusting the light amount by selecting the apertures is explained. However, continuous diaphragm control may be used. Further, the function of the variable gain circuit 3 for adjusting the gain can be inserted in an arbitrary part from the photoelectric conversion part such as CCD to the recording circuit system. In this case, it is desirable to provide it before the circuit section having the nonlinear characteristic. Further, the shutter speed and the gain can be calculated not by referring to the program diagram table but by calculation. The program diagram table is R in the system controller 9.
The information may be supplied from the outside by using, for example, an IC card without being stored in the OM. The shutter speed used in the description of the above embodiments can be applied to the photocharge accumulation time of the photoelectric conversion unit such as CCD or the light flux transmission time by the mechanical or electro-optical light transmission amount adjusting means. As described above, in the electronic image pickup apparatus according to the present invention, the shutter speed set to prevent the recorded image blur and the shutter speed required to obtain an appropriate exposure amount. Difference (can be expressed as a difference or ratio) The information may be supplied from the outside by using, for example, an IC card without being stored in the OM. The shutter speed used in the description of the above embodiments can be applied to the photocharge accumulation time of the photoelectric conversion unit such as CCD or the light flux transmission time by the mechanical or electro-optical light transmission amount adjusting means. As described above, in the electronic image pickup apparatus according to the present invention, the shutter speed set to prevent the recorded image blur and the shutter speed. required to obtain an appropriate exposure amount. Difference (can be expressed as a difference or ratio)
Since the underexposure amount corresponding to is compensated by adjusting the gain of the image pickup system, the time accuracy for obtaining the proper exposure while maintaining the set shutter speed to reduce the blur, Since the underexposure amount corresponding to is compensated by adjusting the gain of the image pickup system, the time accuracy for obtaining the proper exposure while maintaining the set shutter speed to reduce the blur,
Continuous shooting with excellent exposure accuracy is possible. Continuous shooting with excellent exposure accuracy is possible.

【図面の簡単な説明】 【図1】本発明による電子的撮像装置の一実施例を示す
構成ブロック図である。 【図2】照度情報、シャッター速度、絞り値の関係を示
すプログラム線図の一例である。 【図3】図1に示す実施例の動作処理手順を示すフロー
チャートである。 【図4】従来の露出優先動作と連写速度優先動作におけ
る連写撮影時のシャッター速度と得られる映像信号レベ
ルとの関係を示す図である。 【符号の説明】 1 絞り 2 撮像素
子(CCD) 3 可変ゲイン回路 4 撮像プ
ロセス回路 5 FM変調回路 6 記録増
幅回路 7 ヘッド 8 記録媒
体 9 システムコントローラ 10 CCD
駆動回路11 絞り駆動回路 12 AEセンサ13 AEプロセス回路 14 外部スイッチ15 トリガスイッチBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration block diagram showing an embodiment of an electronic imaging device according to the present invention. FIG. 2 is an example of a program diagram showing the relationship between illuminance information, shutter speed, and aperture value. FIG. 3 is a flowchart showing an operation processing procedure of the embodiment shown in FIG. FIG. 4 is a diagram showing a relationship between a shutter speed and a video signal level obtained during continuous shooting in a conventional exposure priority operation and continuous shooting speed priority operation. [Explanation of Codes] 1 Aperture 2 Image sensor (CCD) 3 Variable gain circuit 4 Imaging process circuit 5 FM modulation circuit 6 Recording amplifier circuit 7 Head 8 Recording medium 9 System controller 10 CCD Drive circuit 11 Aperture drive circuit 12 AE sensor 13 AE process circuit 14 External switch 15 Trigger switch BRIEF DESCRIPTION OF THE thereby FIG. 1 is a configuration block diagram showing an embodiment of an electronic imaging device according to the present invention. FIG. 2 is FIG. 3 is a diagram showing an operation processing procedure of the embodiment shown in FIG. FIG. 4 is a diagram showing a relationship between a shutter. An example of a program diagram showing the relationship between illuminance information, shutter speed, and aperture value. speed and a video signal level obtained during continuous shooting in a conventional exposure priority operation and continuous shooting speed priority operation. [Explanation of Codes] 1 Aperture 2 Image sensor (CCD) 3 Variable gain circuit 4 Imaging process circuit 5 FM modulation circuit 6 Recording amplifier circuit 7 Head 8 Recording medium 9 System controller 10 CCD
Drive circuit 11 Aperture drive circuit 12 AE sensor 13 AE process circuit 14 External switch 15 Trigger switch Drive circuit 11 Aperture drive circuit 12 AE sensor 13 AE process circuit 14 External switch 15 Trigger switch

Claims (1)

  1. 【特許請求の範囲】 撮影画像のブレの発生を防止すべく設定された比較的高
    速の第1のシャッタ速度を認識するための第1の手段
    と、 当該撮影条件の下で適正露光量を得るために必要とされ
    る第2のシャッタ速度と上記第1のシャッタ速度との差
    に係る不足露光量を認識するための第2の手段と、 上記第2の手段の手段により認識された不足露光量に対
    応して当該撮像系の利得を設定するための第3の手段
    と、 を具備してなることを特徴とする電子的撮像装置。
    What is claimed is: 1. First means for recognizing a relatively high first shutter speed set to prevent occurrence of blurring of a captured image, and obtaining an appropriate exposure amount under the capturing conditions. Second means for recognizing an underexposure amount related to the difference between the second shutter speed required for this purpose and the first shutter speed, and the underexposure recognized by the means for the second means. An electronic image pickup device comprising: a third means for setting the gain of the image pickup system according to the amount;
JP3352449A 1991-12-13 1991-12-13 Electronic image pickup device Withdrawn JPH05167915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3352449A JPH05167915A (en) 1991-12-13 1991-12-13 Electronic image pickup device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3352449A JPH05167915A (en) 1991-12-13 1991-12-13 Electronic image pickup device

Publications (1)

Publication Number Publication Date
JPH05167915A true JPH05167915A (en) 1993-07-02

Family

ID=18424157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3352449A Withdrawn JPH05167915A (en) 1991-12-13 1991-12-13 Electronic image pickup device

Country Status (1)

Country Link
JP (1) JPH05167915A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7657172B2 (en) 2005-11-29 2010-02-02 Seiko Epson Corporation Controller, photographing equipment, control method of photographing equipment, and control program
US7760247B2 (en) * 2002-12-04 2010-07-20 Canon Kabushiki Kaisha Exposure compensation in image sensing apparatus
JP2011004189A (en) * 2009-06-18 2011-01-06 Canon Inc Image processing apparatus and method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7760247B2 (en) * 2002-12-04 2010-07-20 Canon Kabushiki Kaisha Exposure compensation in image sensing apparatus
US7657172B2 (en) 2005-11-29 2010-02-02 Seiko Epson Corporation Controller, photographing equipment, control method of photographing equipment, and control program
JP2011004189A (en) * 2009-06-18 2011-01-06 Canon Inc Image processing apparatus and method therefor

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