JP2015172610A - Image blur correction apparatus, control method thereof, optical device, and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image blur correction apparatus, configured to increase the accuracy of image blur correction, while reducing power consumption.SOLUTION: An imaging apparatus includes an image blur correction section for detecting camera shake or the like, to correct blur of an image. An angular velocity sensor 108 detects shake of the imaging apparatus, and outputs a detection signal to a high-pass filter 502. The angular velocity sensor 108 can select sleep mode for stopping power to be supplied to some modules thereof. A sleep control section 505 controls the angular velocity sensor 108 in an active state or a suspension state, by turning on/off the sleep mode. When a stability determination section 506 determines that the imaging apparatus is in a static state by use of an output of the angular velocity sensor 108, the sleep control section 505 sets the angular velocity sensor 108 to the sleep mode, changes cutoff frequency of the high-pass filter 502 and a low-pass filter 503, and changes again the cutoff frequency of the high-pass filter 502 and the low-pass filter 503 when the sleep state is released.

Description

  The present invention relates to a technique for correcting a shake of an image by detecting a shake applied to an apparatus such as a hand shake.

  An image shake correction apparatus that prevents image shake due to camera shake during shooting is mounted on an imaging apparatus such as a camera. Camera shake is a vibration with a frequency of typically about 1 Hz to 10 Hz. In order to take a photograph with no image shake in response to camera shake at the time of shutter release, for example, the shake detection unit detects camera vibration, and the drive control unit detects an image shake correction lens according to the detected value. (Hereinafter, referred to as a correction lens) and image sensor position control. In this case, it is necessary to accurately detect the vibration of the camera and to accurately correct the change in the optical axis due to the shake. A vibration detection unit that detects shake acceleration, angular acceleration, angular velocity, angular displacement, and the like applied to the camera and calculates a detection signal for image blur correction is mounted. The drive unit drives the correction lens and the like based on the output of the vibration detection unit, thereby suppressing image blur.

  In a camera provided with a camera shake correction mechanism, the set camera shake correction is not always executed, and the camera shake correction mechanism may be set to a stop state under a predetermined condition. For example, in the image playback mode for displaying a captured image, or when there is no user operation within a predetermined period, the mode is shifted to the power saving mode to save power. At this time, since the camera is not in the shooting mode, the camera shake correction mechanism may be stopped (non-vibration-proof state). On the other hand, if the camera shake detection unit continuously outputs the detection signal during this period, the power consumption of the battery is wasted.

  Patent Document 1 discloses an angular velocity sensor that includes an accurate crystal resonator and can be switched between an operation state and a stop state. Power consumption can be suppressed by shutting off the power supply to some modules of the angular velocity sensor such as the vibrator and the amplifier in the stopped state. In addition, by making the output signal of the angular velocity sensor the same as the reference voltage when the power supply is stopped, the voltage difference of the output voltage when power supply is resumed is reduced as much as possible, and the rapid change in the angular velocity sensor output after return is suppressed, It is possible to shorten the return time until the image stabilization.

JP 2006-325075 A

  In Patent Document 1, a high-precision crystal gyro sensor with small variations and fluctuations in the reference voltage is used. However, there is a demerit that the cost is high, and it is difficult to apply to a low-cost MEMS (Micro Electro Mechanical Systems) type angular velocity sensor. In general, an angular velocity sensor has variations inherent to the sensor with respect to a reference voltage, and further has variations due to temperature drift. Variations and fluctuations in the reference voltage affect image blur correction. For example, there is a possibility that detection is performed as if there is vibration even though vibration does not actually occur. Therefore, measures are taken to remove the DC (direct current) component of the angular velocity sensor by configuring a high-pass filter by analog processing or digital processing.

In Patent Document 1, an input voltage to an analog primary high-pass filter for removing a DC component is matched with a reference voltage. However, if there is an error in the reference voltage of the angular velocity sensor at the time of power supply stop and return due to the influence of temperature drift, etc., until the voltage charge to the capacitor constituting the analog primary high-pass filter reaches the original voltage value. take time. Therefore, there is a possibility that the image blur correction performance is deteriorated during the voltage charging period.
An object of the present invention is to improve the accuracy of image blur correction while suppressing power consumption in an image blur correction apparatus.

  In order to solve the above-described problem, an apparatus according to the present invention includes a shake detection unit that detects a shake of the apparatus and outputs a shake detection signal, a cutoff frequency is variable, and a low frequency component of the shake detection signal And a control unit that determines a target position of the correction unit from the output of the filter and corrects image blur by drive control of the correction unit. The control means sets the vibration detection means to a sleep mode when the apparatus is in a stationary state, changes the cutoff frequency of the filter to a high frequency side, and cancels the sleep mode of the vibration detection means. Control to return the cutoff frequency.

  According to the present invention, it is possible to improve the accuracy of image blur correction while suppressing power consumption.

1 is a schematic plan view of a camera according to an embodiment of the present invention. 1 is a schematic side view of a camera according to an embodiment of the present invention. It is explanatory drawing of the setting and cancellation | release of the sleep mode of an angular velocity sensor. It is explanatory drawing of the setting and cancellation | release of the sleep mode of the angular velocity sensor by the conventional method. It is a block diagram of the correction | amendment lens position calculating part in embodiment of this invention. It is a flowchart explaining the sleep mode determination process in embodiment of this invention. It is a flowchart explaining the sleep mode determination process following FIG. It is explanatory drawing which shows the example of a waveform at the time of the setting and cancellation | release of sleep mode in embodiment of this invention.

  Embodiments of the present invention will be described with reference to the accompanying drawings. The present invention can be applied not only to an image blur correction device mounted on a digital single lens reflex camera or a digital compact camera, but also to an imaging device such as a digital video camera, a surveillance camera, a Web camera, and a mobile phone. An image shake correction apparatus that drives and controls a movable optical member and the like can be mounted on an optical apparatus including an observation apparatus such as a binocular, a telescope, or a field scope. The image blur correction apparatus can also be mounted on an optical device such as an interchangeable lens for a digital single lens reflex camera. Therefore, an optical device and an imaging device also constitute one aspect of the present invention. In the following, drive control of the correction lens is exemplified as an optical member constituting the image blur correction unit, but a configuration in which image blur is corrected by drive control of the imaging unit is also possible.

  1 and 2 show a configuration example of an image pickup apparatus including an image shake correction apparatus according to the present embodiment. FIG. 1 is a schematic plan view showing the inside of the imaging apparatus, and FIG. 2 is a schematic side view. The image shake correction apparatus mounted on the imaging apparatus has shakes indicated by arrows 103p and 103y (hereinafter referred to as angular shakes) and shakes indicated by arrows 104p and 104y (hereinafter referred to as parallel shakes) with respect to the optical axis 102 of the imaging optical system. Image blur correction). Of the two axes orthogonal to the optical axis direction, the pitch rotation axis that is one of the axes is denoted by “p”, and the yaw rotation axis that is the other axis is denoted by “y”.

The camera 101 includes a release button 105, and the operation signals (S1, S2) are output to a camera CPU (central processing unit) 106. S1 is a signal when the first switch of the release switch is turned on by a half-press operation of the release button 105, and S2 is a signal when the release button 105 is further pushed and the second switch of the release switch is turned on. Signal. The camera CPU 106 controls the entire imaging apparatus and executes various processes necessary for the shooting operation according to the program read from the memory. A lens device can be attached to the camera body, and an interchangeable lens type imaging device is configured. The light imaged by the lens device is received by the image sensor 107 and an image signal is output by photoelectric conversion. A signal processing unit (not shown) processes the imaging signal to generate display image data and recording data.
The camera 101 includes angular velocity sensors 108p and 108y as angular velocity detection means for detecting angular shake due to camera shake or the like. The angular velocity sensor 108p detects the angular shake in the pitch direction indicated by the arrow 108pa, and the angular velocity sensor 108y detects the angular shake in the yaw direction indicated by the arrow 108ya. The shake detection signals (angular velocity signals) from the angular velocity sensors 108p and 108y are output to the camera CPU 106. The camera 101 also includes accelerometers 109p and 109y as acceleration detection means for detecting parallel shake. The accelerometer 109p is a sensor that detects a parallel shake indicated by an arrow 109pa, and the accelerometer 109y is a sensor that detects a parallel shake indicated by an arrow 109ya. Detection signals (acceleration signals) from the accelerometers 109p and 109y are output to the camera CPU 106.

  The lens apparatus includes an image shake correction unit using the correction lens 111. The lens driving unit 110 drives the correction lens 111 in the direction indicated by the arrow 110y in FIG. 1 or the direction indicated by the arrow 110p in FIG. 2 to perform image blur correction that takes into account both angular shake and parallel shake. The lens driving unit 110 is controlled by a signal from the driving unit 112. That is, the camera CPU 106 transmits a control signal to the driving unit 112, and the driving unit 112 performs driving control of the lens driving unit 110 according to the control signal.

  Next, with reference to FIG. 3, the temporal change in the angular velocity output by setting (ON) and releasing (OFF) the sleep mode (pause mode) for the angular velocity sensors 108p and 108y will be described. The horizontal axis is the time axis, and the vertical axis is the angular velocity axis. The angular velocity value 302 represents the output of the angular velocity sensor corresponding to the reference voltage Vref. That is, the angular velocity sensor outputs an angular velocity 301 that is a shake amount detected with the angular velocity value 302 as the center. The reference voltage Vref of the angular velocity sensor has a variation from the design value due to variations due to individual differences, temperature fluctuations, and the like. For example, in the case of a digital angular velocity sensor, the sleep mode setting and canceling processing related to the angular velocity sensor is performed by transmitting a specific command through communication with a control microcomputer. In FIG. 3, the timing for setting the sleep mode ON is shown at time t1, and the timing for setting OFF, that is, the release, is shown at time t2.

  Regarding the behavior of the angular velocity sensor in the sleep state, for example, when the sleep mode is set to ON at time t1 shown in FIG. 3, power is supplied to a specific module (vibrator, amplifier, etc.) in the angular velocity sensor. Stopped. Therefore, the angular velocity sensor continues to output the value immediately before shifting to the sleep state. The angular velocity sensor can communicate with the control microcomputer even in the sleep state, and power supply to a specific module is resumed by a release command at the release time t2 of the sleep mode. The angular velocity sensor outputs an angular velocity corresponding to the detected shake. In the case of such a sleep mode specification, image blur correction may be affected depending on the ON setting timing of the sleep state and the timing of canceling and returning from the sleep mode.

  FIG. 4 shows the angular velocity sensor output and the correction lens driving target position when setting and canceling the sleep mode in a state where the imaging device equipped with the angular velocity sensor is shaken greatly due to camera shake or the like, that is, in a state where a large angular velocity is detected. Illustrate. FIG. 4A shows an output change in a state where the camera is greatly shaken like the angular velocity sensor output 401. A detection signal greatly offset from the reference voltage is output. When the sleep mode is set to ON at time t1, the angular velocity sensor continues to output the value immediately before the transition to the sleep mode. For this reason, a detection signal greatly offset from the reference voltage is output during sleep. When the sleep mode is canceled at the subsequent time t2, the angular velocity signal originally detected by the angular velocity sensor is output. Therefore, as shown in the angular velocity sensor output 402, the signal is discontinuous with respect to the output in the sleep state. Is output. FIG. 4B shows the drive target position of the correction lens obtained from the signal obtained by integrating the angular velocity signal and converting it into an angle. The horizontal axis is the time axis, and the vertical axis is the angle axis. As indicated by the angle output 403, the correction lens is controlled at the drive center (the center of the movable range), but during the sleep from time t1 to t2, an angular velocity signal having an offset from the reference voltage is continuously output. . For this reason, the angle target value which is the integral value is a monotonously decreased signal. When the sleep mode is canceled at time t2, as in the angle output 404, the angle target value has a frequency component that monotonously increases at a low frequency, and image blur correction is performed according to the target value. As described above, in the sleep state, when the correction lens is driven according to a target position different from the target position in order to correct the original shake, there is a concern that the image shake correction effect may be reduced. Therefore, in the present embodiment, the measures described below are taken.

  A configuration for determining a target position for image blur correction according to the present embodiment will be described with reference to FIG. The image blur correction calculation unit 501 includes the camera CPU 106 and acquires a detection signal from the angular velocity sensor 108. The variable high-pass filter 502 blocks low frequency components of the angular velocity signal output from the angular velocity sensor 108 and removes, for example, a DC (direct current) component. The variable high pass filter 502 can change the cutoff frequency. The signal after removing the DC component of the angular velocity signal is converted from an angular velocity to an angular signal by the integration process of the variable low-pass filter 503. The variable low-pass filter 503 can change the cutoff frequency. The attenuation gain multiplication unit 504 multiplies the angle signal output from the variable low-pass filter 503 by a gain coefficient, and outputs a target position signal of the correction lens.

  Further, the angular velocity signal output from the angular velocity sensor 108 is input to the stability determination unit 506. The stability determination unit 506 determines whether the imaging device is in a stationary state or a shaken state by determining whether the angular velocity signal is within a predetermined threshold range for a predetermined time. . For example, on the condition that the level of the angular velocity signal is within a predetermined threshold range over the determination reference time, it is determined that the imaging device is in a stationary state, and if the condition is not satisfied, the imaging device is in a stationary state It is determined that it is not. This determination result is notified to the sleep control unit 505. The sleep control unit 505 that sets the mode of the angular velocity sensor 108 changes the cutoff frequencies of the variable high-pass filter 502 and the variable low-pass filter 503 according to the determination result. The sleep control unit 505 changes the gain coefficient of the attenuation gain multiplication unit 504 according to the playback mode notification, no-operation notification, and the determination result of the stability determination unit 506. The playback mode notification is a notification indicating that the user has switched to a playback mode for viewing a captured image by a user operation of an operation member provided in the imaging apparatus. Operation information when the playback mode is set is input to the sleep control unit 505. Is done. The no-operation notification is a notification indicating that no operation has been performed on the imaging apparatus for a predetermined time or longer, and is notified as an operation state monitoring result.

Next, the sleep determination process in the present embodiment will be described with reference to the flowcharts of FIGS. For this process, the camera CPU 106 executes a control program and periodically performs a monitoring process.
When the determination process starts in S601, the process proceeds to S602, and the current mode is determined. It is determined whether the current mode is an image playback mode or a shooting mode. When the user operation for setting the image reproduction mode is performed and the image reproduction mode is determined, the process proceeds to S616 in FIG. If the shooting mode is determined, the process proceeds to S603.
In the case of the image reproduction mode, it is determined in S616 in FIG. 7 whether or not the imaging apparatus is in a stationary state. The stability determination unit 506 determines whether or not the camera is in a stationary state, for example, a state in which the imaging device is installed on a tripod, a state in which there is relatively little shake such as confirmation of a reproduced image, and the like. For example, when the state where the output of the angular velocity sensor 108 is within a predetermined range continues for a predetermined time, it is determined that the vehicle is stationary. If the imaging device is in a stationary state, the process proceeds to S619. If not, the process proceeds to S617.

  In S619, a first counter (a shake time counter) that measures the time during which the imaging apparatus is shaking is initialized. Thereafter, it is determined whether the angular velocity sensor 108 is already in the sleep state (S620). When the angular velocity sensor 108 is not in the sleep state, the process proceeds to S621, and when it is in the sleep state, the process proceeds to S624. In step S621, the sleep control unit 505 transmits a sleep ON setting command to the angular velocity sensor 108, and the angular velocity sensor 108 is set to the sleep state. Further, the image stabilization (image blur correction) process is stopped (S622), and the correction lens 111 is held at the optical center (center position of the movable range). In step S623, the sleep control unit 505 performs control to set the cut-off frequencies of the variable high-pass filter 502 and the variable low-pass filter 503 for calculating the image blur correction target value to be higher than before the change. In the next S624, the second counter is initialized to a predetermined value. The second counter is a counter used for transitioning to the sleep mode OFF state (setting cancellation). Then, the determination process ends (S615).

  On the other hand, in S617, the first counter measures the time during which the imaging apparatus continues to shake, and the shake time count value is compared with a predetermined value (threshold value). When the shake time count value is larger than the predetermined value, the process proceeds to S620, and when it is equal to or smaller than the predetermined value, the process proceeds to S618. After the value of the first counter is incremented in S618, the process proceeds to S624, where the second counter (sleep OFF transition counter) is initialized, and the determination process ends. As described above, when the imaging apparatus continues to shake and a predetermined time has elapsed, the sleep mode is set to ON. The reason for this is to prevent the sleep state from entering the sleep state when the imaging device is always stationary, such as when the user holding the camera is on a vehicle or the like. As described above, the sleep mode of the angular velocity sensor 108 is determined.

  Next, the sleep mode release determination of the angular velocity sensor 108 will be described. If it is determined in S602 in FIG. 6 that the mode of the imaging apparatus is the shooting mode, and it is determined in S603 that the operation of the imaging apparatus has not been operated for a predetermined time, the process proceeds to S604. S604 is a process for determining whether or not a predetermined flag is set. The predetermined flag is a flag related to completion of the transition to the sleep mode OFF state. If this flag is not set, the process proceeds to S605, and if it is set, the process proceeds to S624.

  S605 is processing for determining whether or not the sleep mode has already been turned off. When the sleep mode is not set to OFF, the process proceeds to S606, and when it is set to OFF, the process proceeds to S609. In S606, the sleep state of angular velocity sensor 108 is canceled (OFF setting), and the power supply to the stopped module in the angular velocity sensor is resumed. Thereafter, the second counter (sleep OFF transition counter) is initialized, the gain coefficient to be multiplied by the target position signal is initialized to a predetermined value (S607), and the image blur correction operation is started (S608). Next, the value of the second counter is decremented (S609). The sleep control unit 505 changes the cutoff frequency of the variable digital filter (502, 503) for calculating the control target value of the correction lens 111 (S610). With respect to the cutoff frequency of the variable digital filter, control is performed to gradually lower the cutoff frequency in accordance with the decrement of the count value of the second counter, with the cutoff frequency state set higher in the sleep mode as the initial state set in the sleep mode. Is done. Then, the sleep control unit 505 changes the gain coefficient value of the attenuation gain multiplication unit 504 (S611). In the gain coefficient value changing process, the initial state is set to 0, and the gain coefficient is finally changed to 1 according to the decrement of the count value of the second counter. Although this function will be described later, discontinuity of the correction lens target position after the sleep mode is canceled can be reduced, and image blur correction can be started smoothly. Therefore, it is possible to prevent the user from feeling uncomfortable with a sudden change in the angle of view.

  In S612, it is determined whether or not the count value of the second counter is zero. If the count value is zero, the process proceeds to S614, and if the count value is not zero, the process proceeds to S613. Since the transition to the OFF state of the sleep mode has been completed in S614, the determination process is terminated after the flag (sleep OFF transition completion flag) is set (S615). In S613, the attenuation gain multiplication unit 504 multiplies the correction lens target position by the gain coefficient (attenuation gain coefficient) changed in S611, and then ends the determination process (S615). If it is determined in S605 that the sleep mode has already been set to OFF, the process starts from S609 (decrement of the second counter), and the processes from S610 to S614 are executed. In addition, when the transition to the sleep mode OFF state is completed in S604, the sleep mode OFF setting process is not necessary. Therefore, after the process proceeds to S624 and the second counter initialization process is executed, The determination process ends (S615).

  Next, the effect of the process of changing the attenuation gain coefficient and the cutoff frequency when the sleep mode is canceled will be described. In this embodiment, in the state where the operation of the angular velocity sensor is stopped due to the transition to the sleep mode, the angular velocity immediately before the transition to the sleep state is output as a constant value as described above. That is, using the angular velocity signal, the calculation of the command value to the image blur correction mechanism is continuously executed according to the angle signal obtained by integrating the signal. This is because, when the calculation of the command value is stopped, if the sleep state is canceled while the state immediately before the transition to the sleep state is maintained, the continuity of the calculation intermediate value state such as a digital filter is lost, which is This is because a change in behavior due to continuous influence becomes a problem. That is, the calculation intermediate value of a digital filter or the like should be continuously calculated. Therefore, it is necessary to properly initialize all the variables and states that are assumed to operate continuously in the camera CPU 106 while considering their respective dependencies. There is a concern that the initialization process may be complicated when the initialization is appropriately performed in consideration of the dependency.

  On the other hand, the advantage of continuing the calculation of the command value during the sleep period is that the output of the angular velocity sensor becomes a constant value (no shaking), so that the camera is judged not to shake and there is no shaking. It is to be initialized to the state. In general, a high-pass filter for removing the DC offset component of the angular velocity sensor uses a cut-off frequency filter having a relatively low frequency and a slow convergence time constant in order to improve the image blur correction effect. Therefore, when the filter calculation is stopped and the calculation intermediate value is reset in the sleep state of the angular velocity sensor, it takes a long time to re-learn the DC component of the angular velocity sensor after canceling the sleep, similar to when the camera is activated. Take it. During that time, there is a concern that the image blur correction performance is degraded.

  FIG. 8 shows the angular velocity sensor output at the time of setting and canceling the sleep mode in this embodiment, and FIG. 8A shows an example of the waveform of the angle (corrected lens target position) obtained by integrating the angular velocity sensor output. Shown in An angular velocity sensor output 701 in FIG. 8A illustrates a shake detection signal corresponding to the shake of the imaging device detected before the sleep mode is set to ON, and is in a state having an offset from the reference voltage. An angular output calculated by integrating the angular velocity sensor output 701 is an output waveform 703 shown in FIG.

  At time t1, the angular velocity data acquired by the stability determination unit 506 when transitioning to the sleep mode is a reference voltage or a value (Vref equivalent value) corresponding to a voltage value close thereto. This is because the image capturing apparatus shifts to the sleep mode without shaking. The angular velocity data output during the sleep period from time t1 to time t2 is a constant value (Vref equivalent value). The angular velocity sensor output 702 before and after the sleep mode release time t2 has a small change in offset, and no step-like discontinuity occurs. An angle calculated from the angular velocity sensor output 702 is shown in an output waveform 704 in FIG. Since the degree of discontinuity before and after the cancellation of the sleep mode is small, it is possible to reduce the user's uncomfortable feeling due to a change in the angle of view at the time of cancellation. Since the calculation of the corrected lens target value is started from the center position of the lens driving range from the time when the sleep mode is canceled, high image blur correction performance is immediately demonstrated.

  In the present embodiment, the sleep control unit 505 changes the cutoff frequencies of the variable high-pass filter 502 and the variable low-pass filter 503 to a high frequency during the sleep period of the angular velocity sensor 108. After the cut-off frequency is changed to a high frequency, after the sleep mode is canceled, the cut-off frequency is gradually returned to the original frequency (initial setting value). Therefore, even if the output of the angular velocity sensor suddenly changes due to camera operation, etc., or even if the offset held just before the transition to the sleep mode is deviated from the original offset, the rapid operation of the image blur correction mechanism unit Can prevent the angle of view from shifting. This is because the time until the variable high-pass filter 502 calculates the offset immediately after canceling the sleep mode is shortened. When the sleep mode is canceled, the attenuation gain multiplication unit 504 multiplies the target value (correction lens target position) by a gain coefficient (S613 in FIG. 6). By controlling the correction lens target value to be gradually increased from 0 to 1 time, the same effect as the cutoff frequency changing process can be obtained. Accordingly, it is possible to suppress a sense of incongruity due to a field angle shift and a decrease in image blur correction performance due to the correction lens remaining at the driving end (end of the movable range).

  As described above, when the operation of the angular velocity sensor is stopped in the sleep mode, power consumption is reduced, and when the sleep mode is canceled and the operation returns from the stopped state, the image blur correction operation starts immediately. According to the present embodiment, it is possible to accurately perform image blur correction during a shooting operation while suppressing power consumption.

101 Camera 105 Release switch 106 CPU
107 Image sensor 108y Yaw direction angular velocity meter 108p Pitch direction angular velocity meter 109y Horizontal direction accelerometer 109p Vertical direction accelerometer 110 Lens driver 111 Correction lens

Claims (11)

A shake detection means for detecting a shake of the apparatus and outputting a shake detection signal;
A filter having a variable cut-off frequency and blocking a low-frequency component of the shake detection signal;
Control means for determining a target position of the correction means from the output of the filter and correcting image blur by drive control of the correction means;
The control means sets the vibration detection means to a sleep mode when the apparatus is in a stationary state, changes the cutoff frequency of the filter to a high frequency side, and cancels the sleep mode of the vibration detection means. An image blur correction apparatus that performs control to return the cut-off frequency of the image. A multiplier for multiplying the output of the filter by a gain coefficient for attenuation;
The image blur correction apparatus according to claim 1, wherein the control unit performs control to change the value of the gain coefficient when the sleep mode of the shake detection unit is canceled. The control means includes
Determining means for acquiring the shake detection signal and determining whether the apparatus is in a stationary state;
Comprising sleep control means for controlling the setting and release of the sleep mode of the shake detection means,
When the determination unit determines the stationary state, the sleep control unit sets the shake detection unit to the sleep mode and changes the cutoff frequency of the filter, and then the sleep detection unit is released from the sleep mode. 3. The image blur correction apparatus according to claim 1, wherein control is performed to change a cutoff frequency of the filter in the case of occurrence of the image blur. The control means includes
Determining means for acquiring the shake detection signal and determining whether the apparatus is in a stationary state;
Comprising sleep control means for controlling the setting and release of the sleep mode of the shake detection means,
The sleep control unit measures a time from the time when the sleep mode is released, and the gain coefficient is applied to the output of the filter by the multiplication unit until the measured time reaches a preset time. The image blur correction apparatus according to claim 2, wherein control for multiplying the image blur is performed.   When it is determined that the apparatus is in a stationary state when the operation unit is not in the shooting mode or when the operation member is not operated, the sleep control unit sets the shake detection unit to the sleep mode. 5. The image blur correction apparatus according to claim 3, wherein control is performed to change a cutoff frequency of the filter to a high frequency side after the operation of the correction unit is stopped.   The sleep control unit measures a time during which the shake of the apparatus continues when the determination unit determines that the apparatus is not in a stationary state when the shooting mode is not set or when the operation member is not operated. When the measured time is longer than a preset time, the shake detection unit is set to a sleep mode, and the control of changing the cutoff frequency of the filter is performed after the operation of the correction unit is stopped. 6. The image blur correction apparatus according to claim 3, wherein the image blur correction apparatus is characterized in that:   The sleep control means cancels the sleep mode of the shake detection means when the operation member is not in the non-operating state in the photographing mode, and determines the cutoff frequency of the filter after the operation of the correction means is started. 6. The image blur correction apparatus according to claim 5, wherein control is performed to lower the cut-off frequency set in step.   An optical apparatus comprising the image blur correction device according to claim 1.   An image pickup apparatus comprising the image shake correction apparatus according to claim 1.   The image pickup apparatus according to claim 9, wherein the control unit corrects image blur by driving control of an optical member or the image pickup unit constituting the correction unit. A shake detection means for detecting a shake of the apparatus and outputting a shake detection signal, a filter having a variable cut-off frequency and blocking a low frequency component of the shake detection signal, and a target of the correction means from the output of the filter A control method executed by an image blur correction apparatus including a control unit that determines a position and corrects an image blur by driving control of the correction unit,
When the control means sets the shake detection means to a sleep mode when the apparatus is in a stationary state, and performs control to change the cutoff frequency of the filter to a high frequency side;
A control method for an image blur correction apparatus, comprising: when the control unit cancels a sleep mode of the blur detection unit, the control unit performs control to return a cutoff frequency of the filter.

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