JP2003333438A - Image motion correcting device - Google Patents
Image motion correcting deviceInfo
- Publication number
- JP2003333438A JP2003333438A JP2002138162A JP2002138162A JP2003333438A JP 2003333438 A JP2003333438 A JP 2003333438A JP 2002138162 A JP2002138162 A JP 2002138162A JP 2002138162 A JP2002138162 A JP 2002138162A JP 2003333438 A JP2003333438 A JP 2003333438A
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- Prior art keywords
- correction
- condition
- image
- motion
- correction condition
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ビデオカメラの手
振れ補正機能に用いられる画像動き補正装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image motion correction device used for a camera shake correction function of a video camera.
【０００２】[0002]
【従来の技術】近年、民生用ビデオカメラ（以下ビデオ
ムービーと称す）の小型化、軽量化、光学ズームの高倍
率化が進み、その使い勝手が格段に向上した結果、一般
消費者にとってビデオムービーはごく普通の家電製品の
一つとなっている。しかしその反面、小型化、軽量化、
光学ズームの高倍率化、及び撮影に熟知していない消費
者へのビデオムービーの普及は、撮影時の手振れによる
画面の不安定化という問題も発生させた。よって、この
問題を解決するため、画像動き補正装置を搭載するビデ
オムービーが今や多く開発、商品化されている。2. Description of the Related Art In recent years, consumer video cameras (hereinafter referred to as "video movies") have become smaller and lighter, and the optical zoom has increased in magnification. It has become one of the ordinary household appliances. However, on the other hand, downsizing, weight saving,
The high magnification of the optical zoom and the spread of video movies to consumers who are not familiar with shooting have also caused the problem of screen instability due to camera shake during shooting. Therefore, in order to solve this problem, many video movies equipped with an image motion correction device are now developed and commercialized.
【０００３】撮像装置の画像動き補正装置としては、例
えば、ジンバル機構により撮像光学系及び固体撮像素子
を備えた撮像ユニットを支持し、これを角速度センサー
から得られる撮像装置自体の動き情報に基づき駆動制御
することで画像の動きを補正する方式（"ビデオカメラ
の画振れ防止技術の開発"テレビジョン学会技術報告Ｖ
ｏｌ．１１，Ｎｏ．２８，ｐｐ１９〜２４（１９８
７））がある。As an image motion correction device of an image pickup device, for example, an image pickup unit having an image pickup optical system and a solid-state image pickup device is supported by a gimbal mechanism, and this is driven based on motion information of the image pickup device itself obtained from an angular velocity sensor. A method for correcting image movement by controlling ("Development of image blur prevention technology for video cameras" Technical Report of the Television Society of Japan V
ol. 11, No. 28, pp 19-24 (198)
There is 7)).
【０００４】上記方式は、撮像装置の撮像ユニットをジ
ンバル機構によりその重心点において回転自在に支持
し、角速度センサーから得られる撮像装置のピッチン
グ、ヨーイング２方向の動き情報に基づき、コイルとマ
グネットにより構成されたアクチュエータによりこの撮
像ユニットの姿勢制御を行うことで、撮影画像を安定化
させるものである。In the above system, the image pickup unit of the image pickup device is rotatably supported by the gimbal mechanism at its center of gravity, and the coil and the magnet are constructed based on the pitching and yawing motion information of the image pickup device obtained from the angular velocity sensor. The captured image is stabilized by controlling the attitude of the image pickup unit by the generated actuator.
【０００５】また別の例としては、撮像光学系の前部に
可変頂角プリズムを備え、これを同じく角速度センサー
からの情報により駆動制御することで画像の動きを補正
する方式（"光学式手振れ補正システム"テレビジョン学
会技術報告Ｖｏｌ．１７，Ｎｏ．５，ｐｐ１５〜２０
（１９９３））がある。As another example, a system in which a variable apex angle prism is provided in the front part of the image pickup optical system and the movement of the image is corrected by driving and controlling the variable apex angle prism in accordance with information from an angular velocity sensor ("optical hand shake") Correction System "Technical Report of Television Society Vol. 17, No. 5, pp 15-20
(1993)).
【０００６】上記方式は、２枚のガラス板を特殊なフィ
ルムで作られた蛇腹のようなもので接続し、中を高屈折
率の液体で満たした可変頂角プリズムを固体撮像素子の
前段に設け、角速度センサーから得られるピッチング、
ヨーイング２方向の撮像装置の動きの情報に基づき、こ
の可変頂角プリズムの２枚のガラス板を水平、垂直方向
に各々設けることにより、入射光の光軸を曲げ、撮影画
像の動きを安定化させるものである。In the above system, two glass plates are connected by a bellows-like one made of a special film, and a variable apex angle prism whose inside is filled with a liquid having a high refractive index is provided in front of the solid-state image pickup device. Provided, pitching obtained from the angular velocity sensor,
Based on the information of the movement of the image pickup device in two directions of yawing, the two glass plates of the variable apex angle prism are provided in the horizontal and vertical directions, respectively, to bend the optical axis of the incident light and stabilize the movement of the captured image It is what makes me.
【０００７】また、別の例としては、固体撮像素子上の
画像に対し、その一部分のみを出力画像として読み出す
ための枠を設け、固体撮像素子の駆動タイミングを変え
ることにより、この枠を移動させて画像の動きを補正す
る方式がある。上記方式は、放送方式に合致した標準の
固体撮像素子よりも画素数の多い固体撮像素子を用い、
角速度センサーから得られるピッチング、ヨーイング２
方向の撮像装置の動きの情報を撮影レンズの焦点距離に
基づき、固体撮像素子上の画像の移動量に換算し、撮影
画像の動きに応じて固体撮像素子からの画像の読み出し
位置（枠）を変更することで撮影画像の動きを安定化さ
せるものである。また、近年ではビデオカメラにおいて
も、静止画撮影機能が導入されており、より高画質な静
止画像を得るために静止画撮影に適した画像の動き補正
性能が必要とされている。As another example, a frame for reading out only a part of the image on the solid-state image sensor as an output image is provided, and this frame is moved by changing the drive timing of the solid-state image sensor. There is a method for correcting the movement of the image. The above method uses a solid-state image sensor having a larger number of pixels than a standard solid-state image sensor that conforms to the broadcasting system,
Pitching and yawing 2 obtained from angular velocity sensor
The information of the movement of the image pickup device in the direction is converted into the amount of movement of the image on the solid-state image sensor based on the focal length of the photographing lens, and the position (frame) for reading the image from the solid-state image sensor is determined according to the movement of the photographed image. By changing it, the movement of the captured image is stabilized. Further, in recent years, a still image shooting function has been introduced also in a video camera, and image motion correction performance suitable for still image shooting is required in order to obtain a higher quality still image.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、ビデオカメラでテレビモニターに出力す
るための動画を撮影する際に、画像の動き補正時でもパ
ンニングやチルティング等の意図した撮影動作を自然に
見せるための補正条件を持たせているが、静止画撮影時
にはパンニングやチルティング等の動作を自然に見せる
必要はなく、高い補正効果が必要となるため、先の条件
とは異なる静止画撮影時の補正条件とを、その都度手動
で切り替えなければならないという問題点を有してい
た。However, in the above-described conventional configuration, when a moving image to be output to a TV monitor is shot by a video camera, an intended shooting operation such as panning or tilting is performed even when the motion of the image is corrected. Although it has a correction condition to make the image look natural, it is not necessary to show the panning and tilting motions naturally when shooting a still image, and a high correction effect is required. There is a problem that the correction condition at the time of image capturing has to be manually switched each time.
【０００９】本発明は上記従来の問題点を解決するもの
で、撮像装置の動きに応じて自動的に補正条件を切り替
えることで安定した性能の画像動き補正装置を提供する
ことを目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide an image motion correction apparatus having stable performance by automatically switching the correction conditions according to the movement of the image pickup apparatus.
【００１０】[0010]
【課題を解決するための手段】この目的を達成するため
に本発明の画像動き補正装置は、撮像装置に搭載される
画像動き補正装置であって、撮像装置の動きを検出する
動き検出手段と、前記動き検出手段の出力を平均化する
平均化手段と、前記動き検出手段の出力から画像の動き
を補正する信号を決定する補正信号決定手段と、前記補
正信号決定手段の出力から撮像装置の動きを補正する信
号を発生する補正信号発生手段と、前記動き検出手段と
前記平均化手段の出力の差分値と所定の閾値とを比較す
る比較手段と、前記補正信号決定手段の出力特性を変化
させる第１の補正条件を発生する第１の補正条件発生手
段と、前記補正信号決定手段の出力特性を前記第１の補
正条件とは異なる特性で変化させる第２の補正条件を発
生する第２の補正条件発生手段と、前記第１の補正条件
と前記第２の補正条件の出力を選択可能な切り替え手段
と、前記比較手段の比較結果を元に前記切り替え手段を
切り替えるよう制御する切り替え条件判断手段とを有す
る画像動き補正装置であって、前記切り替え条件判断手
段は、前記比較手段の比較の結果、差分値が閾値よりも
大きい場合は前記第１の補正条件発生手段を選択し、差
分値が閾値よりも小さい場合は前記第２の補正条件発生
手段を選択し、第１の補正条件もしくは第２の補正条件
と前記補正信号決定手段で決定する補正信号に反映させ
る構成を有している。In order to achieve this object, an image motion correction device of the present invention is an image motion correction device mounted on an image pickup device, and a motion detection means for detecting the motion of the image pickup device. An averaging means for averaging the outputs of the motion detecting means, a correction signal determining means for determining a signal for correcting an image movement from the output of the motion detecting means, and an output of the correction signal determining means for the image pickup apparatus. A correction signal generating means for generating a signal for correcting a motion, a comparing means for comparing a difference value between outputs of the motion detecting means and the averaging means with a predetermined threshold, and an output characteristic of the correction signal determining means are changed. First correction condition generating means for generating a first correction condition, and second correction condition for changing the output characteristic of the correction signal determining means with a characteristic different from the first correction condition. Correction of A condition generating means, a switching means capable of selecting the output of the first correction condition and the output of the second correction condition, and a switching condition judging means for controlling the switching means to switch based on the comparison result of the comparing means. In the image motion correction device having the above, the switching condition determination means selects the first correction condition generation means when the difference value is larger than the threshold value as a result of the comparison by the comparison means, and the difference value is the threshold value. If it is smaller than the above, the second correction condition generating means is selected and reflected in the correction signal determined by the first correction condition or the second correction condition and the correction signal determining means.
【００１１】この構成によって、撮像装置使用時に動画
を撮影する際のパンニングやチルティング等の意図した
撮影動作を自然に見せるための第１の補正条件と静止画
を撮影する際にパンニングやチルティングを無視しても
高い補正効果を有する第２の補正条件において、前記動
き検出手段と前記平均化手段の出力から第１の補正条件
と第２の補正条件のどちらが現在の撮影状況に適してい
るかを判別し、前記切り替え手段を切り替えることによ
り、常に安定した性能が得られる画像動き補正装置を提
供することを目的とする。With this configuration, the first correction condition for making the intended shooting operation such as panning and tilting when shooting a moving image when using the image pickup apparatus appear natural, and panning and tilting when shooting a still image. Which of the first correction condition and the second correction condition is more suitable for the current photographing situation based on the outputs of the motion detection means and the averaging means, in the second correction condition having a high correction effect even if is ignored? It is an object of the present invention to provide an image motion correction device that always obtains stable performance by discriminating between the above-mentioned conditions and switching the switching means.
【００１２】[0012]
【発明の実施の形態】本発明の請求項１及び２に記載の
発明は、撮像装置に搭載される画像動き補正装置であっ
て、撮像装置の動きを検出する動き検出手段と、前記動
き検出手段の出力を平均化する平均化手段と、前記動き
検出手段の出力から画像の動きを補正する信号を決定す
る補正信号決定手段と、前記補正信号決定手段の出力か
ら撮像装置の動きを補正する信号を発生する補正信号発
生手段と、前記動き検出手段と前記平均化手段の出力の
差分値と所定の閾値とを比較する比較手段と、前記補正
信号決定手段の出力特性を変化させる第１の補正条件を
発生する第１の補正条件発生手段と、前記補正信号決定
手段の出力特性を前記第１の補正条件とは異なる特性で
変化させる第２の補正条件を発生する第２の補正条件発
生手段と、前記第１の補正条件と前記第２の補正条件の
出力を選択可能な切り替え手段と、前記比較手段の比較
結果を元に前記切り替え手段を切り替えるよう制御する
切り替え条件判断手段とを有する画像動き補正装置であ
って、前記切り替え条件判断手段は、前記比較手段の比
較の結果、差分値が閾値よりも大きい場合は前記第１の
補正条件発生手段を選択し、差分値が閾値よりも小さい
場合は前記第２の補正条件発生手段を選択し、第１の補
正条件もしくは第２の補正条件と前記補正信号決定手段
で決定する補正信号に反映させるものであって、撮像装
置使用時に動画を撮影する際のパンニングやチルティン
グ等の意図した撮影動作を自然に見せるための第１の補
正条件と静止画を撮影する際にパンニングやチルティン
グを無視しても高い補正効果を有する第２の補正条件に
おいて、前記動き検出手段と前記平均化手段の出力から
第１の補正条件と第２の補正条件のどちらが現在の撮影
状況に適しているかを判別し、前記切り替え手段を切り
替えることにより、常に安定した性能を供給するという
作用を有する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claims 1 and 2 of the present invention is an image motion correction device mounted in an image pickup device, comprising a motion detection means for detecting the motion of the image pickup device, and the motion detection device. Averaging means for averaging the outputs of the means, correction signal deciding means for deciding a signal for correcting the movement of the image from the output of the movement detecting means, and movement of the image pickup apparatus from the output of the correction signal deciding means. Correction signal generating means for generating a signal, comparing means for comparing the difference value between the outputs of the motion detecting means and the averaging means with a predetermined threshold value, and a first output characteristic for changing the correction signal determining means. First correction condition generating means for generating a correction condition, and second correction condition generation for generating a second correction condition for changing the output characteristic of the correction signal determining means with a characteristic different from the first correction condition. Means and said first And a switching condition determining means for controlling the switching means to be switched based on the comparison result of the comparing means. Then, the switching condition determination means selects the first correction condition generation means when the difference value is larger than the threshold value as a result of the comparison by the comparison means, and the second correction condition generation means when the difference value is smaller than the threshold value. The correction condition generating means is selected and reflected in the first correction condition or the second correction condition and the correction signal determined by the correction signal determining means, and the panning is performed when shooting a moving image when the image pickup apparatus is used. The first correction condition that makes the intended shooting action such as tilting and tilting look natural, and a high correction effect even when panning and tilting are ignored when shooting a still image. Under the second correction condition, it is determined from the outputs of the motion detection unit and the averaging unit which one of the first correction condition and the second correction condition is suitable for the current shooting condition, and the switching unit is switched. This has the effect of always providing stable performance.
【００１３】以下、本発明の実施の形態について、図面
を用いて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】（実施の形態１）図１は本発明の実施の形
態の画像動き補正装置のブロック図であり、図１におい
て、１は撮像装置の動きを検出する動き検出手段である
動き検出部、２は平均化手段である平均化部で、動き検
出部１の出力を平均化した信号を出力する。３は補正信
号決定手段である補正信号決定部で、動き検出部１で検
出した動きを補正する信号を発生する。４は補正信号発
生手段である補正信号発生部で、補正信号決定部３の出
力から撮像装置の動きを補正する信号を発生する。５は
閾値発生手段である閾値発生部で、動き検出部１と平均
化部２の出力の差分と比較するための値である。６は動
き検出部１と平均化部２の差分と閾値発生部５の閾値と
を比較する比較手段である比較部である。７は所定の補
正係数（本実施の形態では０．８〜０．９９８の範囲）
からなる補正条件Ａを発生する第１の補正条件発生手段
である第１の補正条件発生部であり、８は補正条件Ａと
は異なる特性を持った所定の補正係数（本実施の形態で
は０．９９９の固定値）からなる補正条件Ｂを発生する
第２の補正条件発生手段である第２の補正条件発生部で
ある。ここで、補正条件Ａは通常撮影時である動画撮影
時に使用し、補正条件Ｂは静止画撮影時に使用する。９
は切り替え手段である切り替え部で、切り替え条件判断
部１０の制御により第１の補正条件発生部７と第２の補
正条件発生部８の出力を切り替える。１０は切り替え条
件判断手段である切り替え条件判断部で、切り替え部９
を切り替える条件判断を行う。なお、切り替え条件判断
部１０は、計時手段を備え、比較部６における比較結果
が所定時間変化しない場合は切り替え部９を切り替える
ようにしている。その計時手段は、撮像装置の連続的な
静止状態が続く時間を計時する静止判断タイマと、撮像
装置の連続的な動作状態が続く時間を計時する動作判断
タイマとからなる。(Embodiment 1) FIG. 1 is a block diagram of an image motion correction apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 is a motion detecting section which is a motion detecting means for detecting the motion of an image pickup apparatus. Reference numeral 2 denotes an averaging unit which is an averaging means and outputs a signal obtained by averaging the output of the motion detecting unit 1. Reference numeral 3 denotes a correction signal determination unit which is a correction signal determination unit, and generates a signal for correcting the motion detected by the motion detection unit 1. Reference numeral 4 denotes a correction signal generation unit which is a correction signal generation unit, and generates a signal for correcting the movement of the image pickup apparatus from the output of the correction signal determination unit 3. Reference numeral 5 denotes a threshold value generation unit that is a threshold value generation unit, and is a value for comparison with the difference between the outputs of the motion detection unit 1 and the averaging unit 2. Reference numeral 6 is a comparison unit that is a comparison unit that compares the difference between the motion detection unit 1 and the averaging unit 2 with the threshold value of the threshold value generation unit 5. 7 is a predetermined correction coefficient (in the present embodiment, a range of 0.8 to 0.998)
Is a first correction condition generating unit that is a first correction condition generating means for generating the correction condition A consisting of 8 and a predetermined correction coefficient 8 having a characteristic different from that of the correction condition A (0 in the present embodiment). The second correction condition generation unit is a second correction condition generation unit that generates a correction condition B having a fixed value of .999). Here, the correction condition A is used during moving image shooting, which is a normal shooting, and the correction condition B is used during still image shooting. 9
Is a switching unit that is a switching unit, and switches the outputs of the first correction condition generating unit 7 and the second correction condition generating unit 8 under the control of the switching condition determining unit 10. A switching condition determination unit 10 is a switching condition determination unit, and includes a switching unit 9
Judgment of conditions for switching. The switching condition determination unit 10 is provided with a clocking unit, and switches the switching unit 9 when the comparison result of the comparison unit 6 does not change for a predetermined time. The time measuring means is composed of a stationary determination timer that measures the time during which the imaging device continues to be stationary, and an operation determination timer that measures the time during which the imaging device continues to operate.
【００１５】以上のように構成された本実施の形態の画
像動き補正装置について、図１及び図２を用いてその動
作の一例を説明する。An example of the operation of the image motion correction apparatus of the present embodiment configured as described above will be described with reference to FIGS. 1 and 2.
【００１６】図２に示すステップ１０１にて切り替え部
９は、初期値として、第１の補正条件発生部７からの補
正条件Ａを選択する。この補正条件Ａはパンニングやチ
ルティングといった意図した撮影動作中でも安定した画
像動き補正効果が得られる特性を持つ。つまり、比較的
弱めの補正効果が得られるようにしている。In step 101 shown in FIG. 2, the switching section 9 selects the correction condition A from the first correction condition generating section 7 as an initial value. The correction condition A has a characteristic that a stable image motion correction effect can be obtained even during an intended shooting operation such as panning or tilting. That is, a relatively weak correction effect is obtained.
【００１７】動き検出部１と平均化部２からの出力の差
分と、別途設定した閾値発生部５からの閾値とを比較部
６において比較する（ステップ１０２〜ステップ１０
４）。この比較において、閾値の方が大きい場合には撮
像装置は静止画像を撮影しようとしていると判断し、切
り替え条件判断部１０に含む静止判断タイマをカウント
アップさせる。つまり、使用者が静止画撮影を行おうと
している時は、一般的に撮像装置は使用者が手に持った
まま静止状態にあるか、三脚に固定していることが多
く、この状態では動き検出部１で検出する画像動きは小
さく、よって平均化部２の出力とのレベル差は小さくな
り、閾値よりも小さくなる。The difference between the outputs from the motion detecting section 1 and the averaging section 2 is compared with the threshold value from the threshold value generating section 5 which is set separately in the comparing section 6 (steps 102 to 10).
4). In this comparison, when the threshold value is larger than the threshold value, the imaging device determines that a still image is about to be captured, and causes the stillness determination timer included in the switching condition determination unit 10 to count up. In other words, when the user is trying to take a still image, the imaging device is often in a stationary state while the user holds it, or is fixed on a tripod. The image movement detected by the detection unit 1 is small, so the level difference from the output of the averaging unit 2 is small, and is smaller than the threshold value.
【００１８】この静止判断タイマが所定時間以上となっ
た場合には、撮像装置は完全に静止状態になったと判断
し、静止画撮影時に高い補正効果を持つ（つまり、強い
補正動作を行う）第２の補正条件発生部８からの補正条
件Ｂを選択するように切り替え部９を切り替える（ステ
ップ１０５〜ステップ１０７）。またこのときには、ス
テップ１０８に示すように切り替え条件判断部９に含ま
れる動作判断タイマを初期化する。When the stillness determination timer exceeds a predetermined time, it is determined that the image pickup apparatus is completely in a still state, and a high correction effect (that is, a strong correction operation is performed) at the time of still image shooting is performed. The switching unit 9 is switched so as to select the correction condition B from the second correction condition generating unit 8 (step 105 to step 107). Further, at this time, as shown in step 108, the operation determination timer included in the switching condition determination unit 9 is initialized.
【００１９】一方、ステップ１０４で、比較部８におけ
る比較の結果、動き検出部１と平均化部２との差分が、
閾値発生部５からの閾値以上の場合には、パンニングや
チルティングなど使用者が意図して撮像装置を動かして
いると判断し、切り替え条件判断部９に含む動作判断タ
イマをカウントアップさせる。つまり、パンニングやチ
ルティングなどのように、撮像装置が大きく動く場合
は、動き検出部１の出力と平均化部２の出力との差分値
が大きくなり、差分値が閾値を超えることでパンニング
動作やチルティング動作であることを検出できる。On the other hand, in step 104, as a result of the comparison in the comparison unit 8, the difference between the motion detection unit 1 and the averaging unit 2 is
When it is equal to or more than the threshold value from the threshold value generation unit 5, it is determined that the user intentionally moves the image pickup apparatus such as panning and tilting, and the operation determination timer included in the switching condition determination unit 9 is counted up. That is, when the image pickup apparatus moves largely, such as panning and tilting, the difference value between the output of the motion detection unit 1 and the output of the averaging unit 2 becomes large, and when the difference value exceeds the threshold value, the panning operation is performed. Or tilting operation can be detected.
【００２０】この動作判断タイマが所定時間以上となっ
た場合には、撮像装置はパンニング動作やチルティング
動作を行っていると判断し、パンニングやチルティング
といった意図した操作に対しても安定した補正効果とな
る、第１の補正条件発生部７からの補正条件Ａに切り替
える（ステップ１０９〜ステップ１１１）。またこのと
きには、ステップ１１２に示すように切り替え条件判断
部１０に含まれる静止判断タイマを初期化する。なお、
本説明では補正条件Ａで補正動作を開始したので、切り
替え部９の切り替えは行われず、終始補正条件Ａで動作
する。When the operation determination timer exceeds a predetermined time, it is determined that the image pickup apparatus is performing a panning operation or a tilting operation, and stable correction is performed even for an intended operation such as panning or tilting. The correction condition A is switched to the correction condition A from the first correction condition generation unit 7 that is effective (step 109 to step 111). At this time, as shown in step 112, the stationary determination timer included in the switching condition determination unit 10 is initialized. In addition,
In this description, since the correction operation is started under the correction condition A, the switching unit 9 is not switched, and the operation is always performed under the correction condition A.
【００２１】これらの処理により決定された補正条件Ａ
もしくは補正条件Ｂを、補正信号決定部３で決定する補
正信号に反映し（ステップ１１３）、補正信号決定部３
で決定した補正信号を補正信号発生部４に出力し、補正
信号発生部４で撮像装置の動きを補正する（ステップ１
１４）ことで、常に安定した画像動き補正性能を供給す
ることが可能になる。Correction condition A determined by these processes
Alternatively, the correction condition B is reflected in the correction signal determined by the correction signal determination unit 3 (step 113), and the correction signal determination unit 3
The correction signal determined in step 3 is output to the correction signal generator 4, and the correction signal generator 4 corrects the movement of the imaging device (step 1
By virtue of 14), it is possible to always provide stable image motion correction performance.
【００２２】次に、補正条件Ａ及びＢについて説明す
る。Next, the correction conditions A and B will be described.
【００２３】前述したように、通常撮影時（動画撮影
時）は補正条件Ａを使用し、静止画撮影時は補正条件Ｂ
を使用する。As described above, the correction condition A is used during normal shooting (moving image shooting), and the correction condition B is used during still image shooting.
To use.
【００２４】まず通常撮影時は、ビデオカメラを使用者
が手に持って撮影したり、動く被写体を撮影するために
ビデオカメラを動かすことが多いため、必要以上に補正
をかけては、撮影映像が自然にならない。例えば、人が
走っているシーンを流し撮りする際は、いわゆるパンニ
ング動作を行うわけであるが、手振れの補正効果が高す
ぎると、パンニング撮影時に映像が横揺れしたり、パン
ニング動作から静止動作へ移行した際に映像がパンニン
グ方向とは逆方向へ僅かに動いてしまう現象が発生し、
自然なパンニング映像とはならない。よって、通常撮影
時は、必要以上に大きな補正量を有する補正をかけるの
ではなく、撮影映像が自然に見える範囲で、少なくとも
補正条件Ｂよりも小さい補正効果で補正をかけるように
している。First, during normal shooting, the user often holds the video camera in his hand for shooting and often moves the video camera to shoot a moving subject. Does not become natural. For example, when panning a scene in which a person is running, a so-called panning operation is performed, but if the effect of camera shake correction is too high, the image will sway during panning shooting, or from panning operation to static operation. The phenomenon that the image slightly moves in the direction opposite to the panning direction when transitioning occurs,
It will not be a natural panning video. Therefore, at the time of normal shooting, the correction having a larger correction amount than necessary is not applied, but the correction is performed with a correction effect that is at least smaller than the correction condition B within a range in which the captured image looks natural.
【００２５】次に静止画撮影時は、ビデオカメラを使用
者が手に持っていたとしても、パンニング動作やチルテ
ィング動作をすることはほとんど考えられないので、補
正量を大きくし強く補正をかけても、前述のような現象
による影響は小さい。よって、静止画撮影時は、手ぶれ
による画質劣化が目立ってしまうので、強めに補正をか
けるようにすることで安定した画質の静止画を提供でき
る。そのために補正条件Ｂは補正条件Ａに比べて、補正
効果が高くなるように設定している。Next, at the time of taking a still image, even if the user holds the video camera in his hand, it is almost unlikely to perform a panning operation or a tilting operation. However, the effect of the phenomenon described above is small. Therefore, when a still image is shot, image quality deterioration due to camera shake is conspicuous. Therefore, it is possible to provide a still image with stable image quality by applying a strong correction. Therefore, the correction condition B is set to have a higher correction effect than the correction condition A.
【００２６】補正条件Ａ及びＢは、補正係数と呼ばれる
積分係数で表され、例えば補正条件Ａの係数は０．８〜
０．９９８、補正条件Ｂの係数は０．９９９に設定され
る。この係数が１に近いほど高い補正効果が得られ、小
さくなるほど補正効果は小さくなるものの見た目の映像
が自然で安定したものとなる。但し、０に近くなりすぎ
ると補正量が少なすぎて、手ぶれの方が目立ってしまう
ので、弱めの補正を行う補正条件Ａでも最低０．８程度
にとどめておく。The correction conditions A and B are represented by an integration coefficient called a correction coefficient. For example, the coefficient of the correction condition A is 0.8 to
The coefficient of 0.998 and the correction condition B is set to 0.999. The closer the coefficient is to 1, the higher the correction effect is obtained, and the smaller the coefficient is, the smaller the correction effect is, but the image looks natural and stable. However, if the value is too close to 0, the amount of correction is too small and the camera shake becomes more noticeable. Therefore, the correction condition A for weak correction is kept at a minimum of about 0.8.
【００２７】以上のように本実施の形態によれば、動き
検出部１と平均化部２との差分値と閾値発生部５からの
閾値とを比較し、その比較結果から撮像装置が静止画撮
影を行おうとしている状態か、チルティングやパンニン
グを行っているかを判別し、その判別結果に基づき手ぶ
れ補正の補正条件を変えることで、静止画撮影でもパン
ニング／チルティング撮影でも、安定した良好な画像を
得ることができる。As described above, according to the present embodiment, the difference value between the motion detecting section 1 and the averaging section 2 is compared with the threshold value from the threshold value generating section 5, and the image pickup apparatus determines the still image from the comparison result. By determining whether you are shooting, tilting, or panning, and changing the image stabilization conditions based on the results of the determination, you can obtain stable and good results for both still image shooting and panning / tilting shooting. It is possible to obtain a clear image.
【００２８】[0028]
【発明の効果】以上のように本発明は、補正条件Ａと、
補正条件Ａよりも補正効果が大きい補正条件Ｂとのどち
らが現在の撮影状況に適しているかを判別して切り替え
ることにより、常に安定した性能を供給することができ
るという優れた効果が得られる。As described above, according to the present invention, the correction condition A,
By determining which of the correction condition B, which has a larger correction effect than the correction condition A, and which is more suitable for the current shooting situation, and switching between them, it is possible to obtain an excellent effect that stable performance can always be supplied.
【図１】本発明の実施の形態１における画像動き補正装
置のブロック図FIG. 1 is a block diagram of an image motion correction device according to a first embodiment of the present invention.
【図２】本発明の実施の形態１における処理内容を説明
するための流れ図FIG. 2 is a flowchart for explaining processing contents according to the first embodiment of the present invention.
１ 動き検出部 ２ 平均化部 ３ 補正信号決定部 ４ 補正信号発生部 ５ 閾値発生部 ６ 比較部 ７ 補正条件Ａ ８ 補正条件Ｂ ９ 切り替え部 １０ 切り替え条件判断部 1 Motion detector 2 averaging section 3 Correction signal determination unit 4 Correction signal generator 5 Threshold generator 6 comparison section 7 Correction condition A 8 Correction condition B 9 Switching unit 10 Switching condition determination unit
Claims (2)
であって、撮像装置の動きを検出する動き検出手段と、
前記動き検出手段の出力を平均化する平均化手段と、前
記動き検出手段の出力から画像の動きを補正する信号を
決定する補正信号決定手段と、前記補正信号決定手段の
出力から撮像装置の動きを補正する信号を発生する補正
信号発生手段と、前記動き検出手段と前記平均化手段の
出力の差分値と所定の閾値とを比較する比較手段と、前
記補正信号決定手段の出力特性を変化させる第１の補正
条件を発生する第１の補正条件発生手段と、前記補正信
号決定手段の出力特性を前記第１の補正条件とは異なる
特性で変化させる第２の補正条件を発生する第２の補正
条件発生手段と、前記第１の補正条件と前記第２の補正
条件の出力を選択可能な切り替え手段と、前記比較手段
の比較結果を元に前記切り替え手段を切り替えるよう制
御する切り替え条件判断手段とを有する画像動き補正装
置であって、前記切り替え条件判断手段は、前記比較手
段の比較の結果、差分値が閾値よりも大きい場合は前記
第１の補正条件発生手段を選択し、差分値が閾値よりも
小さい場合は前記第２の補正条件発生手段を選択し、第
１の補正条件もしくは第２の補正条件と前記補正信号決
定手段で決定する補正信号に反映させることを特徴とす
る画像動き補正装置。1. An image motion correction device mounted on an image pickup device, comprising: a motion detection means for detecting the movement of the image pickup device;
Averaging means for averaging the output of the motion detecting means, correction signal determining means for determining a signal for correcting the motion of the image from the output of the motion detecting means, and movement of the image pickup apparatus from the output of the correction signal determining means. Correction signal generating means for generating a signal for correcting the difference, comparing means for comparing a difference value between outputs of the motion detecting means and the averaging means with a predetermined threshold, and an output characteristic of the correction signal determining means. A first correction condition generating means for generating a first correction condition, and a second correction condition for generating a second correction condition for changing the output characteristic of the correction signal determining means with a characteristic different from the first correction condition. A correction condition generating means, a switching means capable of selecting the output of the first correction condition and the output of the second correction condition, and a switching condition for controlling to switch the switching means based on a comparison result of the comparing means. An image motion correction apparatus having a determination means, wherein the switching condition determination means selects the first correction condition generation means when the difference value is larger than a threshold value as a result of the comparison by the comparison means, and the difference When the value is smaller than the threshold value, the second correction condition generating means is selected and reflected in the correction signal determined by the first correction condition or the second correction condition and the correction signal determining means. Image motion correction device.
え、前記比較手段における比較結果が所定時間変化しな
い場合は前記切り替え手段を切り替えることを特徴とす
る請求項１記載の画像動き補正装置。2. The image motion correction apparatus according to claim 1, wherein the switching condition determination means includes a time counting means, and switches the switching means when the comparison result in the comparing means does not change for a predetermined time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002138162A JP2003333438A (en) | 2002-05-14 | 2002-05-14 | Image motion correcting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002138162A JP2003333438A (en) | 2002-05-14 | 2002-05-14 | Image motion correcting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003333438A true JP2003333438A (en) | 2003-11-21 |
Family
ID=29699677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002138162A Pending JP2003333438A (en) | 2002-05-14 | 2002-05-14 | Image motion correcting device |
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| Country | Link |
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| JP (1) | JP2003333438A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006098655A (en) * | 2004-09-29 | 2006-04-13 | Matsushita Electric Ind Co Ltd | Image movement correction device |
| KR100731193B1 (en) | 2005-01-24 | 2007-06-22 | 캐논 가부시끼가이샤 | Image pickup apparatus and image pickup method therefor as well as storage medium storing image pickup program implementing the method |
| JP2008109250A (en) * | 2006-10-24 | 2008-05-08 | Konica Minolta Opto Inc | Imaging apparatus and portable terminal |
| KR100833270B1 (en) | 2006-10-02 | 2008-05-29 | 한국전자통신연구원 | Method and Apparatus for movable auto photographing |
-
2002
- 2002-05-14 JP JP2002138162A patent/JP2003333438A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006098655A (en) * | 2004-09-29 | 2006-04-13 | Matsushita Electric Ind Co Ltd | Image movement correction device |
| JP4561282B2 (en) * | 2004-09-29 | 2010-10-13 | パナソニック株式会社 | Image motion correction device |
| KR100731193B1 (en) | 2005-01-24 | 2007-06-22 | 캐논 가부시끼가이샤 | Image pickup apparatus and image pickup method therefor as well as storage medium storing image pickup program implementing the method |
| KR100833270B1 (en) | 2006-10-02 | 2008-05-29 | 한국전자통신연구원 | Method and Apparatus for movable auto photographing |
| JP2008109250A (en) * | 2006-10-24 | 2008-05-08 | Konica Minolta Opto Inc | Imaging apparatus and portable terminal |
| JP4752720B2 (en) * | 2006-10-24 | 2011-08-17 | コニカミノルタオプト株式会社 | Imaging device and portable terminal |
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