JP2011048097A5 - - Google Patents

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JP2011048097A5
JP2011048097A5 JP2009195846A JP2009195846A JP2011048097A5 JP 2011048097 A5 JP2011048097 A5 JP 2011048097A5 JP 2009195846 A JP2009195846 A JP 2009195846A JP 2009195846 A JP2009195846 A JP 2009195846A JP 2011048097 A5 JP2011048097 A5 JP 2011048097A5
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light emission
emission
main
calculation
preliminary
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ステップS508で、カメラ制御部101は、カメラROM102に記憶された第1フラッシュの予備発光による被写体の反射光の情報と、第2フラッシュの予備発光による被写体の反射光の情報から、第1フラッシュ及び第2フラッシュの本発光量を決定する。例えば、第1フラッシュの本発光量は、第1フラッシュの予備発光による被写体の反射光を各エリアで加重平均した値ΔFと、第1フラッシュと第2フラッシュの露光処理での発光の光量比C_ratioを用いて周知の演算方法で演算し決定する。発光量の演算は、例えば、予備発光の発光量と露光処理での光量との比Gとして、以下のように求める。
G = target − ΔF + C_ratio
ここで、targetは、撮影時に使用される絞り値とシャッター秒時と露光感度に応じて決まる露光量のことである。また、露光処理での発光の光量比C_ratioは、ユーザによって任意の比率に設定可能である。カメラ制御部101は、第1フラッシュと第2フラッシュの2灯合わせて適正露出の発光量となったときの、光量比がC_ratioとなるように、第1フラッシュ及び第2フラッシュそれぞれの発光量を決定する。
In step S <b> 508, the camera control unit 101 calculates the first flash and the reflected light of the subject by preliminary light emission of the first flash and the information of reflected light of the subject by preliminary light emission of the second flash stored in the camera ROM 102. The amount of main light emission of the second flash is determined. For example, the main light emission amount of the first flash is calculated by weighting and averaging the reflected light of the subject by the preliminary light emission of the first flash in each area, and the light amount ratio C_ratio of light emission in the exposure processing of the first flash and the second flash. Is calculated and determined by a known calculation method. The calculation of the light emission amount is obtained as follows, for example, as a ratio G between the light emission amount of the preliminary light emission and the light amount in the exposure process.
G = target-ΔF + C_ratio
Here, the target is an exposure amount determined according to an aperture value used at the time of shooting, a shutter time, and an exposure sensitivity. The light emission ratio C_ratio of light emission in the exposure process can be set to an arbitrary ratio by the user. The camera control unit 101, when a light emission amount of appropriate exposure depending two lamps of the first flash and a second flash, so that the light quantity ratio becomes C_ratio, the light emission amount of each of the first flash and second flash decide.

Claims (5)

被写体に向けて発光を行う照明装置を用いた撮影が可能な撮像装置であって、
被写体を撮像する撮像手段と、
前記被写体を測光する測光手段と、
前記測光手段により前記照明装置の非発光時に得られた非発光時測光値と、前記照明装置の本発光に先立って行われる予備発光時に得られた予備発光時測光値とに基づいて、前記照明装置の本発光量を演算する演算手段と、を有し、
前記演算手段は、連続して複数の本発光量を演算する場合、最初の本発光量の演算の前に前記測光手段により得られた非発光時測光値が所定値以下であれば、最初の本発光量の演算に用いる前記非発光時測光値と、それぞれの本発光に先立って行われる予備発光時に得られる前記予備発光時測光値とに基づいて、それぞれの本発光量を演算することを特徴とする撮像装置。
An imaging device capable of photographing using an illumination device that emits light toward a subject,
Imaging means for imaging a subject;
Metering means for metering the subject;
Based on a non-light-emission photometric value obtained by the photometry means when the illuminating device is not lit, and a preliminary light-emission photometric value obtained during the preliminary luminescence performed prior to the main luminescence of the illuminating device, Calculating means for calculating the main light emission amount of the apparatus,
When the calculation unit continuously calculates a plurality of main flash amounts, if the non-light-emission photometric value obtained by the photometry unit is less than or equal to a predetermined value before the first main flash amount calculation, Calculating the respective main light emission amounts based on the non-light emission photometric values used for calculating the main light emission amounts and the preliminary light emission photometric values obtained during the preliminary light emission performed prior to each main light emission. An imaging device that is characterized.
前記演算手段は、連続して複数の本発光量を演算する場合、前記最初の本発光量の演算に用いる非発光時測光値が所定値以下であれば、該非発光時測光値と、それぞれの本発光に先立って行われる予備発光時に得られる前記予備発光時測光値とに基づいて、それぞれの本発光量を演算することを特徴とする請求項1に記載の撮像装置。   When the calculation means continuously calculates a plurality of main light emission amounts, if the non-light emission photometric value used for the calculation of the first main light emission amount is equal to or less than a predetermined value, The imaging apparatus according to claim 1, wherein each main light emission amount is calculated based on the preliminary light-emission photometric value obtained during the preliminary light emission performed prior to the main light emission. 前記撮像手段による撮像を伴わずに前記照明装置の本発光量を演算させるための演算指示を受け付ける演算指示受付手段を有し、
前記測光手段は、前記演算指示受付手段で受け付けられた演算指示により連続して複数の本発光量を演算する場合、最初の本発光量の演算の前に前記測光手段により得られた非発光時測光値が小さいほど、前記照明装置による予備発光を行ってから次に非発光時の測光を行うまでの間隔を長くすることを特徴とする請求項1又は2に記載の撮像装置。
A calculation instruction receiving means for receiving a calculation instruction for calculating a main light emission amount of the lighting device without imaging by the imaging means;
When the light metering means calculates a plurality of main light emission amounts continuously according to the calculation instruction received by the calculation instruction reception means, the non-light emission time obtained by the photometry means before the calculation of the first main light emission amount 3. The image pickup apparatus according to claim 1, wherein the smaller the photometric value, the longer the interval between the preliminary light emission by the illumination device and the next time the non-light-emission photometry is performed.
前記所定値は、外光であるフリッカを無視できる測光値として予め定められた値であることを特徴とする、請求項1乃至3の何れか1項に記載の撮像装置。   The imaging apparatus according to claim 1, wherein the predetermined value is a value determined in advance as a photometric value that can ignore flicker that is external light. 被写体を撮像する撮像手段と、前記被写体を測光する測光手段とを備え、被写体に向けて発光を行う照明装置を用いた撮影が可能な撮像装置の制御方法であって、
前記撮像装置の演算手段が、前記測光手段により前記照明装置の非発光時に得られた非発光時測光値と、前記照明装置の本発光に先立って行われる予備発光時に得られた予備発光時測光値とに基づいて、前記照明装置の本発光量を演算する演算工程、を有し、
前記演算手段は前記演算工程において、連続して複数の本発光量を演算する場合、最初の本発光量の演算の前に前記測光手段により得られた非発光時測光値が所定値以下であれば、最初の本発光量の演算に用いる前記非発光時測光値と、それぞれの本発光に先立って行われる予備発光時に得られる前記予備発光時測光値とに基づいて、それぞれの本発光量を演算することを特徴とする撮像装置の制御方法。
An imaging apparatus control method comprising: an imaging unit that images a subject; and a photometric unit that performs photometry of the subject, and capable of shooting using an illumination device that emits light toward the subject,
The computing means of the imaging device is a non-light-emission photometric value obtained by the photometry means when the illuminating device is not lit, and a preliminary light-emission photometry obtained during the preliminary luminescence performed prior to the main luminescence of the illuminating device. A calculation step of calculating a main light emission amount of the lighting device based on the value,
When the calculation means calculates a plurality of main light emission amounts continuously in the calculation step , the non-light-emission photometric value obtained by the photometry means before the first main light emission amount calculation is not more than a predetermined value. For example, based on the non-light-emission photometric value used for the calculation of the first main light emission and the preliminary light-emission photometric value obtained during the preliminary light emission performed prior to each main light emission, the respective main light emission amounts are calculated. A control method for an imaging apparatus, characterized by:
JP2009195846A 2009-08-26 2009-08-26 Imaging apparatus and control method thereof Expired - Fee Related JP5390990B2 (en)

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JP2011048097A5 true JP2011048097A5 (en) 2012-10-04
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JP2006243381A (en) * 2005-03-03 2006-09-14 Fuji Photo Film Co Ltd Photographing apparatus
JP2008042471A (en) * 2006-08-04 2008-02-21 Canon Inc Imaging apparatus and processing method thereof
JP2008310233A (en) * 2007-06-18 2008-12-25 Sony Corp Imaging apparatus and method for specifying photometric area

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