JP2007267035A - Image recording apparatus - Google Patents

Image recording apparatus Download PDF

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JP2007267035A
JP2007267035A JP2006089545A JP2006089545A JP2007267035A JP 2007267035 A JP2007267035 A JP 2007267035A JP 2006089545 A JP2006089545 A JP 2006089545A JP 2006089545 A JP2006089545 A JP 2006089545A JP 2007267035 A JP2007267035 A JP 2007267035A
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image
camera shake
amount
shake correction
recording apparatus
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JP4641958B2 (en
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Makoto Hirata
誠 平田
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To select whether camera shake correction is performed or not in an image recording apparatus capable of recording an image acquired in an imaging element 8 according to a user operation into a record medium 5. <P>SOLUTION: The image recording apparatus comprises a camera shake micro computer 2 for performing the camera shake correction to an image by detecting the camera shake at the time of user operation. The camera shake micro computer 2 is designed to calculate the amount of the camera shake at the time of user operation, to compare the calculated amount of the camera shake with a predetermined threshold, then notification about it is made by a display 6 when the mount of the camera shake is larger than the predetermined threshold. Then the camera shake correction is performed to the image when a user indication that the camera shake correction is carried out in accordance with the notification is issued. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、デジタルカメラの如く、ユーザ操作に応じて画像を撮影し、該画像を記録媒体に記録することが可能な画像記録装置に関するものである。   The present invention relates to an image recording apparatus, such as a digital camera, capable of capturing an image in response to a user operation and recording the image on a recording medium.

デジタルカメラにおいては、ユーザがシャッター釦を操作したときの手ぶれを検出して、そのぶれ量に応じて撮影画像に手ぶれ補正を施し、手ぶれ補正の施された画像を記録媒体に記録することが可能となっている(特許文献１、２、３参照)。
この様なデジタルカメラによれば、初心者によっても常にぶれのない画像を記録することが出来る。
特開２００５−３３８３２３号公報 特開２０００−２９８３００号公報 特開平０７−２２６９０５号公報 In digital cameras, it is possible to detect camera shake when the user operates the shutter button, perform camera shake correction on the captured image according to the amount of camera shake, and record the image subjected to camera shake correction on a recording medium (See Patent Documents 1, 2, and 3).
According to such a digital camera, even a beginner can always record an image without blurring.
JP 2005-338323 A JP 2000-298300 A JP 07-226905 A

しかしながら、従来の手ぶれ補正機能付きのデジタルカメラにおいては、手ぶれが検出されたとき、ユーザの意思に拘わらず常に手ぶれ補正が施されることになるため、ユーザが意図的に手ぶれを発生させて画像に特殊効果を付与したい場合等において、手ぶれ補正を施すか否かの選択を行なうことが出来ない問題があった。   However, in a conventional digital camera with a camera shake correction function, when a camera shake is detected, the camera shake correction is always performed regardless of the user's intention. When it is desired to give a special effect to the camera, there is a problem that it is impossible to select whether or not to perform camera shake correction.

そこで本発明の目的は、撮影画像毎にユーザが手ぶれ補正を施すか否かの選択を行なうことが可能な画像記録装置を提供することである。   Accordingly, an object of the present invention is to provide an image recording apparatus that allows a user to select whether or not to perform camera shake correction for each captured image.

本発明に係る画像記録装置は、ユーザ操作に応じて画像を撮影し、該画像を記録媒体に記録することが可能であると共に、ユーザ操作時の手ぶれを検出してぶれ量に応じて画像に手ぶれ補正を施すことが可能であって、
ユーザ操作時のぶれ量を算出する演算手段と、
算出されたぶれ量を所定の閾値と比較して、ぶれ量が所定の閾値よりも大きいとき、その旨を報知する報知手段と、
前記報知に応じて手ぶれ補正を施すべき旨のユーザ指示が発せられたとき、画像に手ぶれ補正を施す補正手段
とを具えている。 The image recording apparatus according to the present invention can capture an image in response to a user operation, record the image on a recording medium, and detect a camera shake at the time of a user operation to generate an image in accordance with the amount of blur. It is possible to perform image stabilization,
Computing means for calculating the amount of shake during user operation;
Comparing the calculated blur amount with a predetermined threshold value, and when the blur amount is larger than the predetermined threshold value, notifying means for notifying that effect,
When a user instruction indicating that camera shake correction should be performed is issued in response to the notification, a correction unit that performs camera shake correction on the image is provided.

上記本発明の画像記録装置によれば、画像記録時の操作によって大きな手ぶれが発生したとき、その旨が報知されるので、ユーザは、手ぶれの発生を認識することが出来、その時点で画像に手ぶれ補正を施すべきか否かを選択して、必要に応じて手ぶれ補正処理の指示を与えることが出来る。
尚、ユーザは、手ぶれ補正処理の指示を与えなかった画像についても、記録媒体に記録した後、該画像に対して手ぶれ補正を施すことが可能である。 According to the image recording apparatus of the present invention, when a large camera shake occurs due to an operation during image recording, the fact is notified, so that the user can recognize the occurrence of the camera shake, and the image is displayed at that time. It is possible to select whether or not to perform camera shake correction and to give an instruction for camera shake correction processing as necessary.
Note that the user can also perform image stabilization on an image that has not been given an instruction for image stabilization processing after being recorded on a recording medium.

具体的には、ユーザ操作時の手ぶれを検出すべき角速度センサーを具え、前記演算処理手段は、前記角速度センサーから得られるピッチ方向(前後への傾き)及びヨー方向(左右へのひねり)の角速度データに基づいて、画面上のぶれベクトルを画素単位で導出し、そのぶれベクトルの大きさを前記ぶれ量として算出する。
この場合、前記閾値は、画面のサイズ(画素数)に応じて変化させることが有効である。 Specifically, it comprises an angular velocity sensor that should detect camera shake at the time of user operation, the arithmetic processing means, the angular velocity in the pitch direction (tilt back and forth) and yaw direction (twist to the left and right) obtained from the angular velocity sensor Based on the data, a blur vector on the screen is derived in pixel units, and the magnitude of the blur vector is calculated as the blur amount.
In this case, it is effective to change the threshold according to the screen size (number of pixels).

又、具体的構成において、前記報知手段は、ぶれ量が所定の閾値よりも大きいとき、手ぶれ補正を施すか否かをユーザに問うメッセージをディスプレイに表示するものである。
該具体的構成によれば、ユーザは、ディスプレイの表示によって容易に手ぶれの発生を認識することが出来る。 Further, in a specific configuration, the notification unit displays a message asking the user whether or not to perform camera shake correction when the amount of shake is greater than a predetermined threshold.
According to this specific configuration, the user can easily recognize the occurrence of camera shake by displaying on the display.

更に具体的には、前記報知手段は、ディスプレイに表示されている撮影画像に重ねて前記メッセージを表示するものである。
該具体的構成によれば、記録せんとする画像を確認して手ぶれ補正を施すべきか否かを判断することが出来る。 More specifically, the notification means displays the message so as to overlap the photographed image displayed on the display.
According to this specific configuration, it is possible to determine whether or not to perform camera shake correction by checking an image to be recorded.

本発明に係る画像記録装置によれば、ユーザが意図的に手ぶれを発生させて画像に特殊効果を付与したい場合等に、撮影画像毎に手ぶれ補正を施すか否かの選択を行なうことが可能である。   According to the image recording apparatus of the present invention, it is possible to select whether or not to perform camera shake correction for each captured image when the user intentionally generates camera shake and wants to give a special effect to the image. It is.

以下、本発明をデジタルカメラに実施した形態につき、図面に沿って具体的に説明する。
本発明に係るデジタルカメラは、図１に示す如く、対物レンズ等の光学系(７)とＣＣＤ等の撮像素子(８)から撮像装置を構成しており、該撮像装置によって取り込まれた画像は、ＡＤ変換回路(９)によってデジタルデータに変換された後、ＣＰＵ(14)及びＳＤＲＡＭ(15)を具えたＡＳＩＣ(１)へ供給される。 Hereinafter, embodiments of the present invention applied to a digital camera will be described in detail with reference to the drawings.
As shown in FIG. 1, the digital camera according to the present invention comprises an image pickup apparatus including an optical system (7) such as an objective lens and an image pickup element (8) such as a CCD, and an image captured by the image pickup apparatus is After being converted into digital data by the AD conversion circuit (9), it is supplied to the ASIC (1) including the CPU (14) and the SDRAM (15).

ＡＳＩＣ(１)には、サブマイコン(３)を介して操作釦(４)が接続されると共に、画像を記録するための記録媒体(５)と、撮影画像を表示するためのディスプレイ(６)とが接続されている。
又、ＡＳＩＣ(１)には、ＡＤ変換回路(16)を具えた手ぶれマイコン(２)が接続されており、ピッチ方向(前後への傾き)及びヨー方向(左右へのひねり)のぶれを検出するための角速度センサーを構成する一対のジャイロスコープ(10)(11)からの検出信号が、それぞれオペアンプ(12)(13)を経て、手ぶれマイコン(２)に供給される。 An operating button (4) is connected to the ASIC (1) via a sub-microcomputer (3), and a recording medium (5) for recording an image and a display (6) for displaying a photographed image. And are connected.
The ASIC (1) is connected to a shake microcomputer (2) equipped with an AD converter circuit (16) to detect shaking in the pitch direction (tilt to the front and back) and yaw direction (twist to the left and right). Detection signals from a pair of gyroscopes (10) and (11) constituting an angular velocity sensor for performing the operation are supplied to the camera shake microcomputer (2) through the operational amplifiers (12) and (13), respectively.

図２は、画像撮影時の制御手続きを表わしており、ステップＳ１では、ジャイロスコープによって構成される角速度センサーからの検出信号に基づいて、シャッター釦操作時のぶれ量を算出する。次にステップＳ２では、算出されたぶれ量を所定の閾値と比較して、手ぶれ発生の有無を判断する。ここでノーと判断されたときは、ステップＳ６に移行して、画像を記録媒体に記録して保存し、手続きを終了する。   FIG. 2 shows a control procedure at the time of image capturing. In step S1, the amount of shake at the time of operating the shutter button is calculated based on a detection signal from an angular velocity sensor constituted by a gyroscope. Next, in step S2, the calculated amount of shake is compared with a predetermined threshold value to determine whether or not camera shake has occurred. If it is determined NO, the process proceeds to step S6, where the image is recorded and stored on the recording medium, and the procedure is terminated.

一方、手ぶれの発生によってステップＳ２にてイエスと判断されたときは、ステップＳ３に移行し、前記算出されたぶれ量が手ぶれ補正の可能な範囲内であるか否かを判断する。ここでノーと判断されたときは、ステップＳ６に移行して、画像を記録媒体に記録して保存し、手続きを終了する。   On the other hand, if it is determined YES in step S2 due to the occurrence of camera shake, the process proceeds to step S3, and it is determined whether or not the calculated camera shake amount is within a range in which camera shake correction is possible. If it is determined NO, the process proceeds to step S6, where the image is recorded and stored on the recording medium, and the procedure is terminated.

ぶれ量が補正可能な範囲内であって、ステップＳ３にてイエスと判断されたときは、ステップＳ４に移行して、手ぶれの発生を報知すると共に手ぶれ補正を施すか否かを問うメッセージをディスプレイに表示する。
これに対して、ユーザが手ぶれ補正を施すべき指示を与えず、ステップＳ４にてノーと判断されたときは、ステップＳ６に移行して、画像を記録媒体に記録して保存し、手続きを終了する。 If the amount of camera shake is within the correctable range and it is determined as YES in step S3, the process proceeds to step S4 to display a message notifying of the occurrence of camera shake and asking whether to perform camera shake correction. To display.
On the other hand, if the user does not give an instruction to perform camera shake correction and the answer is NO in step S4, the process proceeds to step S6, the image is recorded on the recording medium and stored, and the procedure ends. To do.

一方、ユーザが手ぶれ補正を施すべき指示を与え、ステップＳ４にてイエスと判断されたときは、ステップＳ５に移行して、撮影画像に手ぶれ補正を施し、更にステップＳ６にて手ぶれ補正の施された画像を記録媒体に記録して保存し、手続きを終了する。
尚、手ぶれ補正の具体的な処理については、周知のところであるので、説明を省略する。 On the other hand, if the user gives an instruction to perform camera shake correction and it is determined YES in step S4, the process proceeds to step S5, where camera shake correction is performed on the photographed image, and camera shake correction is performed in step S6. The recorded image is recorded on a recording medium and stored, and the procedure is terminated.
Note that the specific processing of camera shake correction is well known and will not be described.

前記ステップＳ１におけるぶれ量の算出は、次の様にして行なう。
手ぶれの元データは、撮影開始から撮影終了までの間（露光期間）のジャイロスコープ(10)の出力信号（ピッチ方向の角速度データ）と、撮影開始から撮影終了までの間（露光期間）のジャイロスコープ(11)の出力信号（ヨー方向の角速度データ）である。ここで、両ジャイロスコープ(10)(11)のサンプリング間隔をｄｔ[sec]とする。 The amount of blur in step S1 is calculated as follows.
The original data of camera shake includes the output signal (angular velocity data in the pitch direction) from the start of shooting to the end of shooting (exposure period) and the gyroscope from the start of shooting to the end of shooting (exposure period). It is an output signal (angular velocity data in the yaw direction) of the scope (11). Here, the sampling interval of both gyroscopes (10) and (11) is dt [sec].

カメラのピッチ方向の角速度θ′[deg/sec]は、ジャイロスコープ(10)(11)によって電圧Ｖｇ[mV]に変換された後、オペアンプ(12)(13)によって増幅される。オペアンプから出力される電圧Ｖａ[mV]はＡＤ変換回路(16)によってデジタル値ＤＬ[step]に変換される。デジタル値として得られたデータを角速度に変換するには、センサー感度Ｓ[mV/deg/sec]、オペアンプのアンプ倍率Ｋ［倍］、Ａ／Ｄ変換係数Ｌ[mV/step]を用いて計算する。 The angular velocity θ ′ [deg / sec] in the pitch direction of the camera is converted into the voltage Vg [mV] by the gyroscope (10) (11) and then amplified by the operational amplifier (12) (13). The voltage Va [mV] output from the operational amplifier is converted into a digital value D L [step] by the AD conversion circuit (16). To convert the data obtained as a digital value into angular velocity, calculation is made using the sensor sensitivity S [mV / deg / sec], the amplifier magnification K [times] of the operational amplifier, and the A / D conversion coefficient L [mV / step]. To do.

ジャイロスコープによって得られる電圧値Ｖｇ[mV]は、角速度θ′[deg/sec]の値と比例する。このときの比例定数はセンサー感度であるので、電圧値Ｖｇ[mV]は、次式１で表わされる。
Ｖｇ＝Ｓθ′ （式１） The voltage value Vg [mV] obtained by the gyroscope is proportional to the value of the angular velocity θ ′ [deg / sec]. Since the proportionality constant at this time is sensor sensitivity, the voltage value Vg [mV] is expressed by the following equation 1.
Vg = Sθ ′ (Formula 1)

また、オペアンプは電圧値Ｖｇを増幅するだけなので、増幅された電圧Ｖａ[mV]は、次式２で表わされる。
Ｖａ＝ＫＶｇ (式２) Further, since the operational amplifier only amplifies the voltage value Vg, the amplified voltage Va [mV] is expressed by the following equation 2.
Va = KVg (Formula 2)

オペアンプで増幅された電圧値Ｖａ[mV]はＡ／Ｄ変換され、ｎ[step]（例えば、−５１２〜５１２）のデジタル値ＤＬ[step]を使って表現される。Ａ／Ｄ変換係数をＬ[mV/step]とすると、デジタル値ＤＬ[step]は、次式３で表わされる。
ＤＬ＝Ｖａ／Ｌ (式３) The voltage value Va [mV] amplified by the operational amplifier is A / D converted and expressed using a digital value D L [step] of n [step] (for example, −512 to 512). When the A / D conversion coefficient is L [mV / step], the digital value D L [step] is expressed by the following equation 3.
D L = Va / L (Formula 3)

上記式１〜式３を用いることで、次式４に示すように、デジタル値ＤＬ[step]から角速度θ′を求めることが出来る。
θ′＝（Ｌ／ＫＳ）ＤＬ (式４) By using the above formulas 1 to 3, the angular velocity θ ′ can be obtained from the digital value D L [step] as shown in the following formula 4.
θ ′ = (L / KS) D L (Formula 4)

撮影中の角速度データから、撮影された画像上でどれだけのぶれが生じたかを計算することが出来る。
角速度データの１つのサンプル値から次のサンプル値までにカメラに生じた回転量をθ[deg]とする。この間、角速度一定でカメラが回転すると仮定し、サンプリング周波数をｆ＝１／ｄｔ[Hz]とすると、回転量θ[deg]は次式５で表わされる。
θ＝θ′／ｆ＝（Ｌ／ＫＳｆ）ＤＬ （式５） It is possible to calculate how much blur has occurred on the photographed image from the angular velocity data being photographed.
The rotation amount generated in the camera from one sample value to the next sample value of the angular velocity data is defined as θ [deg]. During this time, assuming that the camera rotates at a constant angular velocity and the sampling frequency is f = 1 / dt [Hz], the rotation amount θ [deg] is expressed by the following equation (5).
θ = θ ′ / f = (L / KSf) D L (Formula 5)

図３に示すように、ｒ[mm]を焦点距離(３５[mm]フィルム換算)とすると、カメラの回転量θ[deg]から画面上の移動量ｄ[mm]が次式６により求められる。
ｄ＝ｒ・ｔａｎθ （式６） As shown in FIG. 3, when r [mm] is the focal length (35 [mm] film equivalent), the moving amount d [mm] on the screen is obtained from the rotation amount θ [deg] of the camera by the following equation 6. .
d = r · tan θ (Formula 6)

ここで求められた移動量ｄ[mm]は、３５[mm]フィルム換算時の手ぶれの大きさで、単位は[mm]である。実際に計算処理するときには、画像の大きさをデジタルカメラの画像の大きさの単位[pixel]で考えなければならない。   The amount of movement d [mm] obtained here is the size of camera shake when converted to 35 [mm] film, and its unit is [mm]. In actual calculation processing, the size of the image must be considered in the unit [pixel] of the image size of the digital camera.

３５[mm]フィルム換算の画像と、デジタルカメラで撮影した[pixe1]単位の画像は縦横比も異なるので、次のように計算を行なう。
図４(ａ)(ｂ)に示すように、３５[mm]フィルム換算時は画像サイズの横×縦が３６[mm]×２４[mm]と決まっている。デジタルカメラで撮影した画像の大きさをＸ[pixe1]×Ｙ[pixe1]とし、水平方向（ピッチ方向）のぶれ量をｘ[pixe1]、垂直方向（ヨー方向）のぶれ量をｙ[Pixe1]とすると、変換式は次式７、８となる。
ｘ＝ｄｘ（Ｘ／３６）＝ｒ・ｔａｎθｘ（Ｘ／３６） （式７）
ｙ＝ｄｙ（Ｙ／２４）＝ｒ・ｔａｎθｙ（Ｙ／２４） （式８） Since the 35 [mm] film equivalent image and the [pixe1] unit image taken with the digital camera have different aspect ratios, the calculation is performed as follows.
As shown in FIGS. 4A and 4B, when converted to 35 [mm] film, the horizontal size and vertical size of the image size are determined to be 36 [mm] × 24 [mm]. The size of an image taken with a digital camera is X [pixe1] x Y [pixe1], the horizontal (pitch direction) blur amount is x [pixe1], and the vertical (yaw direction) blur amount is y [Pixe1]. Then, the conversion expressions are the following expressions 7 and 8.
x = d x (X / 36) = r · tan θ x (X / 36) (Expression 7)
y = d y (Y / 24) = r · tan θ y (Y / 24) (Formula 8)

尚、上記式７、８には、ｄとθに添字のｘとｙが使用されているが、添字ｘは水平方向の値であることを、添字ｙは垂直方向の値であることを示している。   In the above formulas 7 and 8, the subscripts x and y are used for d and θ. The subscript x is a horizontal value, and the subscript y is a vertical value. ing.

上記式１〜８をまとめると、水平方向（ピッチ方向）のぶれ量ｘ[Pixe1]、垂直方向（ヨー方向）のぶれ量ｙ[pixe1]は、次式９、１０で表わされる。
ｘ＝ｒ・ｔａｎ｛（Ｌ／ＫＳｆ）ＤＬｘ｝Ｘ／３６ （式９）
ｙ＝ｒ・ｔａｎ｛（Ｌ／ＫＳｆ）ＤＬｙ｝Ｙ／２４ （式１０） Summarizing the above formulas 1 to 8, the blur amount x [Pixe1] in the horizontal direction (pitch direction) and the blur amount y [pixe1] in the vertical direction (yaw direction) are expressed by the following formulas 9 and 10.
x = r · tan {(L / KSf) D Lx } X / 36 (Equation 9)
y = r · tan {(L / KSf) D Ly } Y / 24 (Formula 10)

この変換式９、１０を用いることで、デジタル値として得られたカメラの各軸の角速度データから、画像のピッチ方向及びヨー方向のぶれ量ｘ、ｙを求めることが出来る。
そして、これらのぶれ量ｘ、ｙから次式１１により判定対象となる判定ぶれ量ｚを求める。
ｚ＝（ｘ×ｘ）＋（ｙ×ｙ） (式１１) By using the conversion formulas 9 and 10, the blur amounts x and y in the pitch direction and the yaw direction of the image can be obtained from the angular velocity data of each axis of the camera obtained as a digital value.
Then, a determination blur amount z to be a determination target is obtained from the blur amounts x and y by the following expression 11.
z = (x × x) + (y × y) (Formula 11)

従って、判定ぶれ量ｚが所定の閾値ｔｈよりも小さい場合は、手ぶれ無しと判定することが出来、判定ぶれ量ｚが所定の閾値ｔｈ以上の場合は、手ぶれ有りと判定することが出来る。ここで、閾値ｔｈは、ディスプレイの画面のサイズ(画素数)の大きさに応じて変えることが有効である。   Accordingly, when the determination blur amount z is smaller than the predetermined threshold th, it can be determined that there is no camera shake, and when the determination blur amount z is equal to or greater than the predetermined threshold th, it can be determined that there is a camera shake. Here, it is effective to change the threshold th in accordance with the size of the display screen (number of pixels).

図５(ａ)〜(ｄ)は、画像記録時のディスプレイ(６)の表示例を表わしており、同図(ａ)の如くスルー画像が表示されている状態でシャッター釦が操作されると、同図(ｂ)の如く記録の対象となる画像(フリーズ画像)が表示されると共に、前述の如くぶれ量の算出が実行され、手ぶれが発生している場合は、同図(ｃ)の如く、ディスプレイ(６)には、手ぶれ補正を施すべきか否かの選択を案内するメッセージが、撮影画像(フリーズ画像)に重ねて表示される。そして、ユーザが手ぶれ補正を指示した場合は、撮影画像に手ぶれ補正を施すと共に、同図(ｄ)の如く手ぶれ補正終了のメッセージを表示する。   FIGS. 5A to 5D show display examples of the display 6 when recording an image. When the shutter button is operated in a state where a through image is displayed as shown in FIG. When an image to be recorded (freeze image) is displayed as shown in FIG. 5B and the amount of shake is calculated as described above, and a camera shake occurs, the image shown in FIG. As described above, on the display (6), a message for guiding the selection of whether or not to perform camera shake correction is displayed on the captured image (freeze image). When the user instructs camera shake correction, the camera shake correction is performed on the captured image, and a camera shake correction end message is displayed as shown in FIG.

上述のデジタルカメラによれば、ユーザが意図的に手ぶれを発生させて画像に特殊効果を付与したい場合等において、撮影画面毎に手ぶれ補正を施すか否かの選択を行なうことが可能である。
又、ユーザは撮影時に手ぶれの発生を認識することが出来るので、撮影姿勢、光源の状態、環境条件などを踏まえた撮影技術の向上に資することが出来る。 According to the digital camera described above, it is possible to select whether or not to perform camera shake correction for each shooting screen when the user intentionally generates camera shake and wants to give a special effect to the image.
In addition, since the user can recognize the occurrence of camera shake at the time of shooting, it is possible to contribute to improvement of shooting technology based on the shooting posture, the state of the light source, environmental conditions, and the like.

又、手ぶれの発生を確認した上で、手ぶれ補正後の画像を手ぶれ補正前の画像と比較するによって、手ぶれ補正の効果を確認することが出来る。
更に又、手ぶれ補正前の画像と手ぶれ補正後の画像の両方を、記録媒体に記録することも可能である。 Further, after confirming the occurrence of camera shake, the effect of camera shake correction can be confirmed by comparing the image after camera shake correction with the image before camera shake correction.
Furthermore, it is possible to record both an image before camera shake correction and an image after camera shake correction on a recording medium.

本発明に係るデジタルカメラの構成を示すブロック図である。It is a block diagram which shows the structure of the digital camera which concerns on this invention. 画像撮影時の制御手続きを示すフローチャートである。It is a flowchart which shows the control procedure at the time of image photography. カメラの回転と画面上の移動量の関係を説明する図である。It is a figure explaining the relationship between rotation of a camera and the movement amount on a screen. ３５mmフィルム換算のぶれ量とデジタルカメラにおける画素単位のぶれ量の関係を説明する図である。It is a figure explaining the relationship between the blurring amount of 35 mm film conversion, and the blurring amount of the pixel unit in a digital camera. ディスプレイの表示例を示す図である。It is a figure which shows the example of a display of a display.

符号の説明Explanation of symbols

(１) ＡＳＩＣ
(２) 手ぶれマイコン
(４) 操作釦
(５) 記録媒体
(６) ディスプレイ
(７) 光学系
(８) 撮像素子
(10) ジャイロスコープ
(11) ジャイロスコープ (1) ASIC
(2) Camera shake microcomputer
(4) Operation buttons
(5) Recording medium
(6) Display
(7) Optical system
(8) Image sensor
(10) Gyroscope
(11) Gyroscope

Claims (4)

ユーザ操作に応じて画像を撮影し、該画像を記録媒体に記録することが可能であると共に、ユーザ操作時の手ぶれを検出してぶれ量に応じて画像に手ぶれ補正を施すことが可能な画像記録装置において、
ユーザ操作時のぶれ量を算出する演算手段と、
算出されたぶれ量を所定の閾値と比較して、ぶれ量が所定の閾値よりも大きいとき、その旨を報知する報知手段と、
前記報知に応じて手ぶれ補正を施すべき旨のユーザ指示が発せられたとき、画像に手ぶれ補正を施す補正手段
とを具えていることを特徴とする画像記録装置。 An image capable of capturing an image in response to a user operation, recording the image on a recording medium, and detecting camera shake at the time of the user operation and correcting the image in accordance with the amount of camera shake In the recording device,
Computing means for calculating the amount of shake during user operation;
Comparing the calculated blur amount with a predetermined threshold value, and when the blur amount is larger than the predetermined threshold value, notifying means for notifying that effect,
An image recording apparatus comprising: correction means for performing camera shake correction on an image when a user instruction to perform camera shake correction is issued in response to the notification. ユーザ操作時の手ぶれを検出すべき角速度センサーを具え、前記演算処理手段は、前記角速度センサーから得られるピッチ方向及びヨー方向の角速度データに基づいて、画面上のぶれベクトルを画素単位で導出し、そのぶれベクトルの大きさを前記ぶれ量として算出する請求項１に記載の画像記録装置。   Comprising an angular velocity sensor that should detect camera shake during user operation, and the arithmetic processing means derives a shake vector on the screen in pixel units based on angular velocity data in the pitch direction and yaw direction obtained from the angular velocity sensor; The image recording apparatus according to claim 1, wherein a magnitude of the blur vector is calculated as the blur amount. 前記報知手段は、ぶれ量が所定の閾値よりも大きいとき、手ぶれ補正を施すか否かをユーザに問うメッセージをディスプレイに表示するものである請求項１又は請求項２に記載の画像記録装置。   The image recording apparatus according to claim 1, wherein the notification unit displays a message asking the user whether or not to perform camera shake correction when the amount of shake is larger than a predetermined threshold. 前記報知手段は、ディスプレイに表示されている撮影画像に重ねて前記メッセージを表示するものである請求項３に記載の画像記録装置。   The image recording apparatus according to claim 3, wherein the notification unit is configured to display the message so as to overlap a captured image displayed on a display.
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