JP2015021992A - Image blur correction device, control method and control program thereof, and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a phenomenon that an image blur correction lens is retained at a maximum drive position, while providing a required image blur correction effect in accordance with a photographing state.SOLUTION: An attitude detection unit 117 detects a shake of an imaging apparatus to obtain shake detection information, and a camera system control unit 118 moves an image blur correction lens 103 in a direction crossing an optical axis by an image blur correction drive unit 104 on the basis of the shake detection information, to control the correction of blur of an optical image formed by an imaging optical system. In this case, the camera system control unit changes a movable range for image blur correction between a through image display state where a through image corresponding to the optical image is displayed and a photographic exposure state during photographing.

Description

  The present invention relates to an image shake correction apparatus, a control method thereof, a control program, and an image pickup apparatus, and more particularly to an image pickup apparatus having an image shake correction lens that is a correction lens.

  In general, in an imaging apparatus such as a digital camera, a shake of the imaging apparatus itself is detected and an image shake due to the shake is corrected. At this time, the movable lens movable body (image blur correction lens and its holding member) is driven so that the image blur is corrected by the image blur correction device.

  An angular velocity sensor is often used for shake detection in an image shake correction apparatus. In the angular velocity sensor, a vibration material such as a piezoelectric element is vibrated at a predetermined frequency, and a voltage corresponding to the Coriolis force generated by the rotational motion component is output as angular velocity information.

  The image shake correction apparatus integrates the angular velocity information to obtain the shake amount and direction, and outputs a correction position control signal for driving the lens movable body so as to cancel the image shake.

  When driving the lens movable body, the current position of the lens movable body is fed back to the image blur correction device as a movable body position signal. The shake correction apparatus performs feedback control for outputting a corrected position control signal corresponding to the movable body position signal.

  By the way, the photographer may intentionally move the imaging device when operating the camera. For example, the photographer may perform so-called panning shooting in which shooting is performed while moving (rotating) the imaging apparatus in the horizontal direction. In panning shooting, it is desirable that the shooting range of an image move with time as intended by the photographer.

  However, when the image blur correction device detects an operation by panning photographing (panning operation) as a shake and drives the movable lens body, in general, the blur due to the panning operation cannot be canceled even if the image blur correction lens is moved by the maximum amount. Therefore, when the panning operation is finished, the image blur correction lens is in a state where it has been moved by the maximum amount.

  As a result, when the panning operation is completed, there is a direction in which the image blur correction lens cannot be moved, and sufficient blur correction may not be performed.

  In order to avoid the above problems, panning control is known in which the position of the image shake correction lens is forcibly centered when the shake correction amount is increased by the panning operation.

  When taking a still image with an imaging device having an image blur correction device, it is desirable that the image blur correction effect be higher. However, when a shake recognized as a panning operation occurs, panning control is performed regardless of whether or not the photographer is performing panning shooting. As a result, the image blur correction effect is reduced.

  On the other hand, in order to achieve both the panning control and the image blur correction effect, it is easy to shift to the panning control at the time of the high-speed shutter shooting that hardly causes the influence of the camera shake, and at the time of the low-speed shutter shooting that easily causes the influence of the camera shake. There is an imaging device that makes it difficult to shift to panning control (see Patent Document 1).

JP 2006-201723 A

  However, in the imaging apparatus described in Patent Document 1, it is difficult to suppress the phenomenon that the image blur correction lens remains at the maximum drive position while providing a necessary image blur correction effect according to the shooting situation.

  For example, it is assumed that when a large shake such as a panning operation or a body shake occurs during a through image, a release switch is operated immediately after that and a still image is taken. In this case, even if it is easy to shift to panning control, if the image blur correction lens is near the movable end, the image blur correction lens cannot be moved any further, so that a sufficient image blur correction effect can be obtained. Can not.

  Further, since the so-called panning characteristic is not changed until the exposure is started when the release switch is operated, the image blur correction characteristic is optimized in consideration of the shutter speed during the exposure in the case of a through image. I have not been told.

  Accordingly, an object of the present invention is to provide an image blur correction apparatus capable of suppressing the phenomenon that the image blur correction lens stays at the maximum drive position while providing a necessary image blur correction effect according to the shooting situation, and its A control method, a control program, and an imaging device are provided.

  In order to achieve the above object, an image shake correction apparatus according to the present invention is an image shake correction apparatus used in an image pickup apparatus that obtains image data corresponding to an optical image incident through an imaging optical system, A shake detection unit that detects shake of the apparatus to obtain shake detection information, a correction member that is movable in a direction intersecting the optical axis of the imaging optical system and corrects the optical image, and the shake detection information And a control means for correcting and controlling image blurring of the optical image by the imaging optical system by moving the correction member in a direction intersecting the optical axis, and a through image for displaying a through image corresponding to the optical image. And a movable range changing means for changing a movable range of the correction member between a display state and a photographing exposure state at the time of photographing.

  An imaging device according to the present invention is an imaging device including the image touch correction device described above.

  The control method according to the present invention includes a correction member that is movable in a direction intersecting the optical axis of the imaging optical system and corrects an optical image incident through the imaging optical system, and the imaging optical system includes An image shake correction apparatus control method used in an image pickup apparatus that obtains image data corresponding to an optical image incident thereon via a shake detection step of detecting shake of the image pickup apparatus to obtain shake detection information, and the shake A control step for correcting and correcting image blur of the optical image by the imaging optical system by moving the correction member in a direction crossing the optical axis based on detection information, and displaying a through image corresponding to the optical image And a movable range changing step of changing the movable range of the correction member between a through image display state to be performed and a photographing exposure state at the time of photographing.

  The control program according to the present invention includes a correction member that is movable in a direction intersecting the optical axis of the imaging optical system and corrects an optical image incident through the imaging optical system. A control program used in an image shake correction apparatus used in an image pickup apparatus that obtains image data corresponding to an optical image incident thereon via a computer that detects the shake of the image pickup apparatus in a computer included in the image shake correction apparatus A shake detection step for obtaining shake detection information, and a control step for correcting and controlling image blur of the optical image by the imaging optical system by moving the correction member in a direction crossing the optical axis based on the shake detection information. A movable range changing step of changing a movable range of the correction member in a through image display state for displaying a through image corresponding to the optical image and a photographing exposure state at the time of photographing; Characterized in that to execute.

  According to the present invention, the movable range of the correction lens is changed between the through image display state and the photographing exposure state, so that the correction lens can be driven at the maximum while providing a necessary image blur correction effect according to the photographing state. The phenomenon of staying at the position can be suppressed.

1 is a block diagram illustrating a configuration of an example of an imaging apparatus including an image shake correction apparatus according to an embodiment of the present invention. FIG. 2 is a diagram for explaining a movable range of the image blur correction lens shown in FIG. 1. FIG. 10 is a diagram in which shake amounts based on camera shake data samples are arranged in time series for each shutter speed. It is a figure which shows the average value and the maximum value for every shutter speed from the change of the blur angle shown in FIG. FIG. 2 is a diagram illustrating an example of setting a movable range according to a shutter speed of the image blur correction lens illustrated in FIG. 1. 2 is a flowchart for explaining processing when determining a movable range of an image blur correction lens in the camera shown in FIG. 1.

  Hereinafter, an example of an imaging apparatus including an image shake correction apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration of an example of an imaging apparatus including an image shake correction apparatus according to an embodiment of the present invention.

  The illustrated imaging apparatus is, for example, a digital still camera (hereinafter simply referred to as a camera), and may be provided with a so-called moving image shooting function. The camera includes a zoom unit 101 that is a part of a photographing lens unit that forms an imaging optical system, and the zoom unit 101 includes a zoom lens that changes the magnification of the lens.

  The zoom drive unit 102 drives and controls the zoom unit 101 under the control of a camera system control unit (hereinafter simply referred to as a control unit) 118. An image blur correction lens (IS) 103 used as a correction member (correction lens) is disposed so as to be movable in a direction orthogonal to the optical axis of the photographing lens unit (that is, a crossing direction). An optical image incident from the image optical system is corrected. The image blur correction drive unit 104 drives and controls the image blur correction lens 103 under the control of the control unit 118.

  The aperture / shutter unit 105 is a mechanical shutter having an aperture function. The aperture / shutter driving unit 106 drives the aperture / shutter unit 105 under the control of the control unit 118.

  The focus lens 107 is a part of the photographing lens unit, and its position can be changed along the optical axis of the photographing lens unit. The focus driving unit 108 drives the focus lens 107 under the control of the control unit 118.

  The imaging unit 109 converts an optical image incident through the photographing lens unit into an electrical signal (analog image signal) in units of pixels using an imaging element such as a CCD image sensor or a CMOS image sensor.

  The imaging signal processing unit 110 performs A / D conversion, correlated double sampling, gamma correction, white balance correction, color interpolation processing, and the like on the analog image signal output from the imaging unit 109 to obtain a video signal ( Image data).

  The video signal processing unit 111 processes the video signal output from the imaging signal processing unit 110 according to the application. For example, the video signal processing unit 111 generates a display video according to the video signal. Further, the video signal processing unit 111 performs encoding processing and data file processing on the video signal for recording.

  The display unit 112 displays an image corresponding to the display video signal output from the video signal processing unit 111. The power supply unit 113 supplies power to the entire camera according to its application. The external input / output terminal unit 114 inputs and outputs communication signals and video signals between the camera and the external device.

  The operation unit 115 has buttons and switches for the user to give instructions to the camera. The storage unit 116 stores various data such as video signals.

  The posture detection unit 117 detects the posture of the camera and provides the detection result (posture detection signal) to the video signal processing unit 111 and the display unit 112 as posture detection information. The control unit 118 includes, for example, a CPU, a ROM, and a RAM, and the CPU expands and executes a control program stored in the ROM to execute control of the entire camera.

  The operation unit 115 is provided with a release button for sequentially turning on the first switch (SW1) and the second switch (SW2) in accordance with the pressing amount. Here, the first switch SW1 is turned on when the release button is depressed about half, and the second switch SW2 is turned on when the release button is depressed to the end.

  When the first switch SW1 is turned on, the control unit 118, for example, the focus driving unit 108 according to the AF evaluation value obtained based on the display video signal output to the display unit 112 by the video signal processing unit 111, for example. To control auto focus detection. In addition, in order to obtain an appropriate exposure amount, the control unit 118 performs AE processing for determining an aperture value and a shutter speed based on luminance information related to the video signal and a predetermined program diagram.

  When the second switch SW2 is turned on, the control unit 118 performs imaging based on the determined aperture value and shutter speed, and stores the image data obtained as a result of imaging by the imaging unit 109 in the storage unit 116.

  Further, when displaying a so-called through image obtained when the release switch is not pressed, the control unit 118 prepares the luminance information and the program line for the video signal at a predetermined interval in preparation for still image shooting exposure. Aperture value and shutter speed are preliminarily determined based on the figure.

  The operation unit 115 is provided with an image blur correction switch for selecting a shake correction control (image blur correction) mode. When the shake correction mode is selected by operating the image shake correction switch, the control unit 118 controls the image shake correction drive unit 104 to perform an image shake correction operation by the image shake correction drive unit 104.

  Further, the operation unit 115 is provided with a shooting mode selection switch for selecting one of the still image shooting mode and the moving image shooting mode, and the control unit 118 selects an image according to the selected shooting mode. The operating condition of the shake correction driving unit 104 is changed.

  In addition, the operation unit 115 is provided with a reproduction mode selection switch for selecting a reproduction mode, and the control unit 118 stops the image blur correction operation by the image blur correction driving unit 104 when the reproduction mode is selected. To do.

  The operation unit 115 includes a zooming switch for instructing zoom zooming. When an instruction for zooming magnification is given by the zooming switch, the control unit 118 controls the zoom driving unit 102 to drive and control the zoom unit 101 by the zoom driving unit 102 and move the zoom unit 101 to the instructed zoom position. Let

  Based on the attitude information sent from the attitude detection unit 117, the video signal processing unit 111 determines whether the video signal is vertically long or horizontally long, and determines the image display direction on the display unit 112.

  Here, the movable range of the image blur correction lens 103 will be described.

  In the illustrated example, when the second SW2 of the release switch provided in the operation 115 is turned on, still image exposure is started, but the through image display state in which the second switch SW2 is turned off and the second switch SW2 is turned off. The movable range of the image blur correction lens 103 is changed in the still image exposure state in which the switch SW2 of No. 2 is on. For example, in the still image exposure state, the movable range of the image blur correction lens 103 is enlarged as compared with the through image display state.

  FIG. 2 is a view for explaining the movable range of the image blur correction lens 103 shown in FIG.

  In FIG. 2, the movable range of the image blur correction lens 103 in the still image exposure state is expanded as compared with the through image display state. The reason why the movable range in the still image exposure state is expanded with respect to the movable range in the through image display state is as follows.

  For example, when the panning operation or the shake is large, even if the second switch SW2 is turned on with the image shake correction lens 103 reaching the movable end, the image shake correction lens 103 cannot move any more, so the image shake is not performed. Correction operation cannot be performed. As a result, camera shake cannot be corrected.

  For this reason, the movable range in the still image exposure state is made larger than the movable range of the image shake correction lens in the through image display state, and even if the image shake correction lens 103 reaches the movable end in the through image display state. However, since the movable range is expanded when the second switch SW2 is turned on, that is, in the still image exposure state, shake correction can be performed accordingly.

  Next, the movable range of the image blur correction lens required during exposure will be described.

  In general, it is said that when a still image is taken, if the shutter speed is faster than 1 / f, image blur due to camera shake hardly occurs (here, f is a focal length [mm] in terms of 35 mm). Therefore, when the shutter speed is faster than 1 / f, it is not necessary to enlarge the movable range during exposure.

  FIG. 3 is a diagram in which shake amounts based on camera shake data samples are arranged in time series for each shutter speed.

  In the example shown in FIG. 3, the shake amount (blur angle) is arranged in time series in the exposure time interval calculated for each shutter speed for the camera shake data sample. Here, the horizontal axis is time (seconds), and the vertical axis is the blur angle. Here, the change in the blur angle is shown for each of shutter speeds (Tv) of 1/250, 1/125, 1/60, 1/30, 1/15, and 1/8.

  As can be easily understood from FIG. 3, it can be seen that the shake amount, that is, the blur angle increases as the shutter speed (Tv) decreases.

  FIG. 4 is a diagram showing the average value (ave) and the maximum value (max) for each shutter speed from the change in the blur angle shown in FIG.

  As shown in FIG. 4, as the shutter speed (Tv) increases, the shake amount per exposure time decreases. When the shutter speed (Tv) is 1/250, it can be seen that the amount of shake during exposure is about 0.01, which is almost none. It can also be seen that the shake amount is reduced to about half when the shutter speed is increased by one step.

  Here, regarding the relationship between the movable range in the through image display state and the still image exposure state (also referred to as the photographic exposure state), the exposure time increases when the shutter speed is slow, and the shake amount increases. If the enlargement amount of the movable range at is excessively increased, the movable range in the through image display state must be reduced as a price.

  On the other hand, if the movable range in the through image display state is too small, the image blur correction effect is reduced when framing is aimed at the subject, so that it is difficult to perform framing due to camera shake.

  Therefore, even when the shutter speed is slow, it is desirable to ensure a predetermined amount of movable range in the through image display state. The maximum movable range of the image blur correction lens that combines the movable range in the through image display state and the enlarged portion of the movable range in the still image exposure state is determined by the limitation due to the mechanical structure and the limitation due to the optical performance.

  The ratio between the movable range in the through image display state and the enlarged portion of the movable range in the still image exposure state is determined by the balance between the ease of aiming at the time of framing and the secured amount of the image shake correction range in the still image exposure state. The

  Considering the above points, here, as the movable range when the shutter speed is slower than 1/60 or less, for example, the movable range of the image blur correction lens 103 in the through image display state is 0.2 degrees, and the still image The movable range in the exposure state is further expanded 0.1 degree to 0.3 degrees.

  When the shutter speed is faster than 1/250, there is almost no shake amount in the still image exposure state, so there is no need to extend the movable range, and the entire movable range is used so that framing can be easily performed during EVF. To.

  When the shutter speed exceeds 1/60 and is 1/250 or less, the amount of expansion of the movable range in the still image exposure state is reduced. For example, the movable range in the through image display state is set to 0.25 degrees, and the enlargement amount of the movable range in the still image exposure state is set to 0.05 degrees.

  Here, as described above, the movable range of the image blur correction lens 103 is set in three stages according to the shutter speed, but the number of stages for changing the movable range according to the shutter speed may be further increased. .

  In addition, in the relationship between the focal length in terms of 35 mm and the amount of camera shake, shake due to camera shake hardly occurs at a shutter speed of 1 / f. Therefore, when the focal length is shorter than 250 mm, the shutter is faster than 1 / f. In terms of speed, the movable range in the through image display state may be set to 0.3 degrees.

  In this case, in 1 / f1 (f1 is 1/4 of f), the movable range in the through image display state is 0.25 degrees, and the movable range in the still image exposure state is 1 / f. When the shutter speed is slower than 1 / f1, the movable range in the through image display state is 0.2 degrees, and the enlarged portion of the movable range in the still image exposure state is 0.1 degrees. You may make it.

  FIG. 5 is a diagram illustrating an example of setting of a movable range according to the shutter speed of the image blur correction lens 103 illustrated in FIG.

  In FIG. 5, when the shutter speed is high, when the enlargement amount of the movable range in the still image exposure state is reduced and the movable range in the through image display state is increased, image blur correction control is performed so that framing can be easily performed. It is desirable to change the parameters as well. For example, the cutoff frequency in the filter processing is changed so that the image blur correction can be performed up to the low frequency range.

  Furthermore, in order to make it difficult for the shift lens to go to the movable end, a parameter for processing (referred to as brake processing) for causing the image blur correction lens 103 to return to the center position is changed according to the shift lens position. Thus, the image blur correction effect is enhanced in accordance with the change of the movable range so that the movable range in the through image display state can be used more effectively.

  FIG. 6 is a flowchart for explaining processing when determining the movable range of the image blur correction lens 103 in the camera shown in FIG.

  Note that the processing according to the illustrated flowchart is performed under the control of the control unit 118. Here, determination of the movable range at the shutter speed using the focal length f converted to 35 mm will be described.

  When the power is turned on (step S101), the control unit 118 starts image blur correction control. Subsequently, the control unit 118 determines whether or not the second switch SW2 is turned on in the release switch (step S102). If the second switch SW2 is not turned on (NO in step S102), the control unit 118 determines that the shutter speed is 1 / f or more, assuming that the through image display state is set (step S103).

  If the shutter speed is 1 / f or more (or more than the threshold value) (YES in step S103), the control unit 118 has a movable range of the image shake correction lens 103 in the through image display state of 0.3 degrees, and still image exposure. A first movable range setting (movable range setting “1”) in which the amount of expansion of the movable range in the state is none is set (step S104).

  Subsequently, in accordance with the first movable range setting, the control unit 118 sets the cut-off frequency in the filter processing to the first cut-off frequency so that the image shake can be corrected up to a lower range of shake, and the image can be captured in a wider range. A first image blur correction parameter setting (image blur correction parameter setting “1”) is set as a first effect amount with a small effect amount in the brake process so as to obtain a shake correction effect (step S105).

  The image blur correction parameter is a control parameter, and this control parameter is used when performing panning processing or braking processing.

  After setting the first image blur correction parameter, the control unit 118 determines whether or not the power is turned off (step S106). If the power is not turned off (NO in step S106), control unit 118 returns to the process of step S102 and determines whether or not second switch SW2 is turned on. On the other hand, when the power is turned off (YES in step S106), control unit 118 ends the photographing process.

  As described above, the first movable range setting and the first image blur correction parameter setting enable the photographer to hold the camera firmly in addition to improving the image blur correction effect by expanding the movable range in the through image display state. The image blur correction effect at the time can be improved and the framing effect can be improved.

  When the shutter speed is slower than 1 / f (NO in step S103), control unit 118 determines whether shutter speed (Tv) is faster than 1 / f1. That is, the control unit 118 determines whether 1 / f1 <Tv <1 / f is satisfied (step S107).

  Here, f1 is an arbitrarily set value. For example, when the shutter speed at which camera shake correction is sufficiently effective is set to two stages, the focal length in 35 mm equivalent that f1 = 1/4 × f is obtained. Selected.

  If the shutter speed is faster than 1 / f1, that is, if 1 / f1 <Tv <1 / f (YES in step S107), the control unit 118 has a movable range of the image blur correction lens 103 in the through image display state. The second movable range setting (movable range setting “2”) is set to be 0.25 degrees and the movable range expansion amount in the still image exposure state is 0.05 degrees (step S108).

  Subsequently, the control unit 118 sets the second image blur correction parameter setting (image blur correction parameter setting “2”) in accordance with the second movable range setting (step S109).

  In the second image blur correction parameter setting, since the movable range in the through image display state is narrower than that in the first movable range setting, the effect of the image blur correction effect is greater than that in the first image blur correction parameter setting. Decrease the amount to make the second effect amount. Note that the cutoff frequency in the second image blur correction parameter setting is the second cutoff frequency.

  Thereafter, the control unit 118 proceeds to the process of step S106 and determines whether or not the power is turned off.

  When the shutter speed is 1 / f1 or less (NO in step S107), the control unit 118 has a movable range of the image blur correction lens 103 in the through image display state of 0.2 degrees, and in the still image exposure state. A third movable range setting (movable range setting “3”) in which the expansion amount of the movable range is 0.1 degree is set (step S110).

  Subsequently, the control unit 118 sets a third image blur correction parameter setting (image blur correction parameter setting “3”) in accordance with the third movable range setting (step S111).

  In the third image blur correction parameter setting, compared to the first and second image blur correction parameter settings, the movable range in the through image display state is narrower than the first and second movable range settings. The effect amount of the image blur correction effect is weakened to obtain the third effect amount. Note that the cutoff frequency in the third image blur correction parameter setting is the third cutoff frequency.

  Thereafter, the control unit 118 proceeds to the process of step S106 and determines whether or not the power is turned off.

  When the second switch SW2 is turned on (YES in step S102), the control unit 118 performs image blur correction parameter setting (exposure image blur correction parameter setting) in the still image exposure state (step S112). In the image blur correction parameter for exposure, the cutoff frequency in the filter process and the effect amount in the brake process are set so that the image blur correction effect is higher than in the through image display state.

  In setting the image blur correction parameter data for exposure, the image blur correction effect may be changed according to the shutter speed. For example, as described above, in the through image display state, the first image blur correction parameter setting> the second image blur correction parameter setting> the third image blur correction parameter setting indicates that the image with the higher shutter speed is displayed. Although the blur correction effect is increased, the image blur correction parameter for exposure may be set according to the shutter speed so that the image blur correction effect is increased when the shutter speed is slower in the still image exposure state.

  After setting the image blur correction parameter for exposure, the control unit 118 performs still image shooting processing (step S113), proceeds to the processing of step S106, and determines whether or not the power switch is turned off.

  As described above, in the illustrated example, the movable range of the image blur correction lens 103 and the image blur correction parameter are set according to the focal length, but according to the shutter speed and the shake amount during exposure shown in FIGS. Thus, the movable range and the image blur correction parameter may be set in consideration of only the shutter speed.

  For example, when the shutter speed is 1/250 or more, the first movable range setting and the first image blur correction parameter setting are set. When the shutter speed is slower than 1/250 and faster than 1/60, the second movable range setting and the second image blur correction parameter setting are set. When the shutter speed is 1/60 or less, The third movable range setting and the third image blur correction parameter setting are used.

  Thus, when the movable range of the image blur correction lens (IS) 103 is limited, the amount of expansion of the movable range in the through image display state and the movable range in the still image exposure state is changed according to the shutter speed. When image blur correction parameters are set in the movable range, optimal image blur correction control can be performed. As a result, it is possible to suppress the phenomenon that the image blur correction lens stays at the maximum drive position while providing a necessary image blur correction effect according to the shooting situation.

  As is clear from the above description, in the example shown in FIG. 1, the image blur correction drive unit 104 and the camera system control unit 118 function as a control unit, and the camera system control unit 118 functions as a movable range change unit. In the example shown in FIG. 1, at least the image blur correction lens 103, the image blur correction drive unit 104, the posture detection unit 117, and the camera system control unit 118 constitute an image blur correction device.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to these embodiment, Various forms of the range which does not deviate from the summary of this invention are also contained in this invention. .

  For example, the function of the above-described embodiment may be used as a control method, and this control method may be executed by the image blur correction apparatus. Further, a program having the functions of the above-described embodiments may be used as a control program, and the control program may be executed by a computer included in the image blur correction apparatus. The control program is recorded on a computer-readable recording medium, for example.

  Each of the above control method and control program has at least a shake detection step, a control step, and a movable range changing step.

  The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various recording media, and the computer (or CPU, MPU, etc.) of the system or apparatus reads the program. To be executed.

DESCRIPTION OF SYMBOLS 101 Zoom unit 102 Zoom drive control part 103 Image shake correction lens 104 Image shake correction drive part 105 Aperture / shutter unit 106 Aperture / shutter drive part 111 Video signal processing part 112 Display part 115 Operation part 118 Camera system control part

Claims (9)

An image shake correction apparatus used in an imaging apparatus that obtains image data corresponding to an optical image incident via an imaging optical system,
Shake detection means for detecting shake of the imaging device and obtaining shake detection information;
A correction member that is movable in a direction intersecting the optical axis of the imaging optical system and corrects the optical image;
Control means for correcting and controlling image blur of the optical image by the imaging optical system by moving the correction member in a direction crossing the optical axis based on the shake detection information;
A movable range changing means for changing a movable range of the correction member between a through image display state for displaying a through image corresponding to the optical image and a photographing exposure state at the time of photographing;
An image blur correction apparatus comprising:   The image blur correction apparatus according to claim 1, wherein the movable range changing unit changes a movable range in the through image display state and a movable range in the photographing exposure state according to a shutter speed.   The image blur correction apparatus according to claim 2, wherein the movable range changing unit expands the movable range in the photographing exposure state more than the movable range in the through image display state.   The movable range changing means widens the movable range in the through image display state and reduces the enlargement amount of the movable range in the photographing exposure state when the shutter speed is equal to or higher than a predetermined threshold. The image blur correction device according to 3.   The image blur correction apparatus according to claim 4, wherein the threshold is set according to a focal length of the imaging optical system.   6. The image according to claim 4, wherein when the movable range in the through image display state is enlarged, the control means changes a control parameter used for the control means for correcting and controlling the image blur. Shake correction device.   An imaging apparatus comprising the image shake correction apparatus according to claim 1. A correction member capable of moving in a direction intersecting the optical axis of the imaging optical system and correcting an optical image incident through the imaging optical system; A control method of an image shake correction apparatus used in an imaging apparatus that obtains corresponding image data,
A shake detection step of detecting shake of the imaging device and obtaining shake detection information;
A control step of correcting and controlling image blur of the optical image by the imaging optical system by moving the correction member in a direction intersecting the optical axis based on the shake detection information;
A movable range changing step of changing a movable range of the correction member between a through image display state for displaying a through image corresponding to the optical image and a photographing exposure state at the time of photographing;
A control method characterized by comprising: A correction member capable of moving in a direction intersecting the optical axis of the imaging optical system and correcting an optical image incident through the imaging optical system; A control program used in an image shake correction device used in an imaging device that obtains corresponding image data,
In the computer provided in the image blur correction device,
A shake detection step of detecting shake of the imaging device and obtaining shake detection information;
A control step of correcting and controlling image blur of the optical image by the imaging optical system by moving the correction member in a direction intersecting the optical axis based on the shake detection information;
A movable range changing step of changing a movable range of the correction member between a through image display state for displaying a through image corresponding to the optical image and a photographing exposure state at the time of photographing;
A control program characterized by causing

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