JP2004294571A - Shake correcting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shake correcting device capable of restraining the unpleasant movement of an image by restraining a shake correction lens from moving toward the center of movableness when a tripod is fixed. <P>SOLUTION: A shake correction system 100 is equipped with an angular velocity sensor 3 for detecting shake, the shake correction lens 4 correcting image blur, a VCM 6 for driving the lens 4, a correction lens position detection part 7 for detecting the position of the lens 4, a driving control part (20) for arithmetically calculating the target position signal Ic of the lens 4 from the output of the sensor 3 and controlling the VCM 6 based on the signal Ic, a bias part (20) for biasing the signal Ic based on position information Ir obtained from the detection part 7 or the signal Ic so that the lens 4 may go toward a specified centripetal position, and a bias adjusting part (20) for adjusting the centripetal position of the bias part (20). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a blur correction device that corrects image blur by moving a part or all of a lens in an optical device such as a camera, a lens, a video, and binoculars.
[0002]
[Prior art]
Conventionally, this type of image stabilization device detects camera shake to prevent camera shake, and corrects image shake on the film surface by moving a part of the lens along with camera shake. Is what you do.
[0003]
FIG. 9 is a conceptual diagram of a shake correction system for correcting camera shake.
The camera 2 has six degrees of freedom, and is divided into three degrees of freedom rotational movement, pitching, yawing, and rolling, and three degrees of freedom translation, X, Y, and Z directions. Can be Camera shake correction is usually performed for two degrees of freedom movement, pitching and yawing.
[0004]
The camera shake motion is monitored by the angular velocity sensors 3x and 3y. The angular velocity sensors 3x and 3y are piezoelectric vibration type angular velocity sensors for detecting Coriolis force generated by normal rotation, the angular velocity sensor 3x is an angular velocity meter for detecting pitching blur, and the angular velocity sensor 3y is for detecting yaw blur. It is an angular velocity meter.
[0005]
When performing shake correction, the outputs of the angular velocity sensors 3x and 3y are sent to the CPU 20, and the CPU 20 calculates the target drive position of the shake correction lens 4. The CPU 20 sends an instruction signal to the voltage drivers 32x and 32y to drive the blur correction lens 4 to the target driving position, and the voltage drivers 32x and 32y supply power to the VCMs 6x and 6y in accordance with the instruction signal. Do. The blur correction lens 4 is driven by the VCMs 6x and 6y. By driving the blur correction lens 4 according to the blur, the blur correction can be performed.
[0006]
[Problems to be solved by the invention]
However, in recent years, blurring when the three legs are fixed (three-leg blurring) has been regarded as a problem. It is well known that image blur occurs even when a camera is fixed to a tripod. The blur angle is about 0.001 to 0.01 deg. When photographing is performed using a telephoto lens having a focal length of 400 mm, the blur on the image plane is about 70 μm.
When correcting tripod blur when the tripod is fixed, it is necessary to consider the influence of the center bias when the tripod is fixed. The center bias technique is used for equally providing a correction range in each of the pitch direction and the yaw direction. Specifically, by applying a center bias, the blur correction lens 4 is positioned near the center of the movable range, and the amount of movement in the X and Y directions (corresponding to the coordinate axes of the blur correction lens 4 in the figure) is made substantially uniform. It is possible to do.
[0007]
However, when the blur correction lens 4 is not shaken when the tripod is fixed, the blur correction lens 4 slowly starts moving toward the movable center of the blur correction lens 4 due to the influence of the center bias. The image in the viewfinder also moves due to the movement of the shake correction lens 4. This movement of the image is uncomfortable for the photographer or the like.
[0008]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a blur correction device capable of suppressing a blur correction lens from moving toward a movable center when a tripod is fixed, and suppressing an unpleasant movement of an image.
[0009]
[Means for Solving the Problems]
The present invention solves the above problem by the following means. In addition, in order to facilitate understanding, the description will be given with reference numerals corresponding to the embodiment of the present invention, but the present invention is not limited to this. That is, a first aspect of the present invention provides a shake detecting unit (3) for detecting shake, a shake correcting unit (4) for correcting image shake, and a driving unit (6) for driving the shake correcting unit (4). Calculating a target position signal (Ic) of the shake correcting section (4) from an output of the shake detecting section (3) and a position detecting section (7) for detecting a position of the shake correcting section (4); A drive control unit (20, S102, 103, 111, 112, 113) for controlling the drive unit (6) based on a target position signal (Ic), and position information obtained from the position detection unit (7) (Ir) or a bias unit (20) for applying a bias to the target position signal (Ic) such that the shake correction unit (4) is directed to a predetermined centripetal position based on the target position signal (Ic). , S101) and the bias section (20, S101). Bias correction unit for correcting the heart position and (20, S104~110), a stabilization device having the.
[0010]
According to a second aspect of the present invention, there is provided the shake correction apparatus according to the first aspect, wherein the output of the shake detection unit (3) determines whether a device on which the shake correction device is mounted is a hand-held device or a fixed device. The bias correction unit (20, S104 to 110) includes a state determination unit (20, S104), and the bias unit (20, S101) when the support state determination unit (20, S104) determines that the state is fixed. A center position of the shake correction unit (4) at the time of the determination.
[0011]
According to a third aspect of the present invention, in the shake correction apparatus according to the first or second aspect, the bias correction unit (20, S104 to 110) determines that the support state determination unit (20, S104) is fixed. In this case, the amount of bias toward the centripetal position is increased.
[0012]
According to a fourth aspect of the present invention, in the shake correction apparatus according to any one of the first to third aspects, the low-pass filter (3) removes a high-frequency noise component of the signal detected by the shake detecting unit (3). 31), and the drive control unit (20, S102, 103, 111, 112, 113) determines a parameter of the low-pass filter (31) when the support state determination unit (20, S104) determines that the support state is fixed. Is changed to the high frequency side.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings and the like.
FIG. 1 is a block diagram showing an outline of an embodiment of a shake correction system 100 according to the present invention. Note that, in this specification, blur correction refers to performing correction in the pitching direction and the yawing direction. Although FIG. 1 illustrates the shake correction system 100 in the pitching direction, the same applies to the shake correction system in the yaw direction. The camera 2 corresponds to the cross-sectional view of the camera 2 in the YZ plane shown in FIG. 9, and the same members are denoted by the same reference numerals, and the description of the overlapping portions will be omitted as appropriate.
[0014]
The blur correction system 100 according to the present embodiment includes the camera 2, the lens CPU 20, and the like. The camera 2 and the lens CPU 20 are connected via a low-pass filter (hereinafter, appropriately referred to as LPF) 31, voltage drivers 32x, 32y, and the like. The lens CPU 20 is connected to a body CPU 40, a release switch 41, and the like via a lens contact 33.
The camera 2 includes a lens barrel 1 and the like. The lens barrel 1 fixes the lenses 9, 10, 11 of the photographing optical system, the supports 12, 13, 14 of the lenses 9, 10, 11, the angular velocity sensor 3, the blur correction lens 4, and the blur correction lens 4. A lens chamber 5, a VCM 6 for driving the blur correction lens 4, a correction lens position detection unit 7 for detecting the position of the blur correction lens 4, a lock unit 8 for the blur correction lens 4, A correction SW 15 and the like are provided. Further, the blur correction lens 4 can be moved up and down so as to correct the tilt of the optical axis 16 due to blur in the pitching direction.
[0015]
Hereinafter, the function and the like of each member will be described in detail.
FIG. 2 is a diagram illustrating a support structure of the angular velocity sensor 3.
The angular velocity sensor 3 is a vibration gyro-type sensor that detects shake, and is elastically supported as shown in FIG. The angular velocity sensor 3 is soldered to a land (not shown) of the electric board 18. The electric board 18 has a hole 18a. A bush 19 made of butyl rubber or the like is fitted in the hole 18a, and is fixed to the lens barrel 1 with a screw 17.
[0016]
The reason why the bush portion 19 is used is that it is difficult for the angular velocity sensor 3 to transmit an impulse-like impact accompanying the mirror up / down operation or shutter travel during a series of exposure sequences.
Further, the hardness of the bush portion 19 will be described. The frequency band of the shake generated when the camera is fixed to the tripod is about 4 to 35 Hz (see FIG. 3), which is higher than the frequency band of the shake when the photographer holds the camera by hand. If the hardness of No. 19 is reduced, the output of the angular velocity sensor 3 is delayed with respect to the frequency of the tripod swing. Therefore, the hardness of the bush portion 19 is set so as to be supported at a resonance frequency higher than the frequency of the tripod swing.
[0017]
Returning to the description of FIG. The output of the angular velocity sensor 3 removes high frequency noise components via a low-pass filter 31. Next, it is quantized by an A / D converter and input to the lens CPU 20.
The LPF processing unit 21 performs LPF processing on the angular velocity data ω1 input into the lens CPU 20 to obtain the center level. This LPF processing also has a function of eliminating the influence of the drift of the angular velocity sensor 3.
[0018]
In the LPF processing, LPF1 and LPF2 having different cutoff frequencies fc are selectively used.
The LPF 1 is a filter having a cutoff frequency for normal photographing, and is set to, for example, a cutoff frequency of about 0.1 Hz.
The LPF 2 is a filter used at the time of tripod determination (a blur determination method will be described later), and is set to a cutoff frequency of about 2 Hz, for example. The relationship between the cutoff frequencies is LPF1 <LPF2.
[0019]
Here, selection of the cutoff frequency will be described.
FIG. 3 is a diagram illustrating frequency distributions of the drift, hand shake, and three-leg shake of the angular velocity sensor 3. The horizontal axis represents the frequency, and the vertical axis represents the blur angle.
As shown in FIG. 3, the frequency band of the shake at the time of hand-held imaging is about 0.1 to 10 Hz, and the frequency band of the case where the tripod is fixed is about 4 to 35 Hz. In addition, the output of the angular velocity sensor 3 drifts when the power is turned on. In the case of handheld shooting, the cutoff frequency fc is set to LPF1, and the drift component of the angular velocity sensor 3 is removed as much as possible.
[0020]
When the tripod is fixed, the cutoff frequency fc is set to LPF2. The frequency component of the three-leg shake is located at a higher frequency than the frequency component of the hand shake. In addition, the three-leg blurring angle is smaller than the camera shake, and is more easily affected by the drift of the angular velocity sensor 3.
Therefore, it is necessary to set the cutoff frequency fc of the LPF processing unit 21 higher at the time of the three-leg shake correction compared to the fc at the time of the camera shake correction (LPF1 <LPF2) to enhance the drift removing effect.
[0021]
Returning to the description of FIG. The output ω2 of the LPF processing unit 21 is subtracted from the angular velocity data ω1, and the angular velocity data ω3 that needs to be corrected is calculated.
The speed bias processing unit 22 subtracts the speed bias data s1 from the angular velocity data ω3 after the subtraction. The speed bias processing is for giving the blur correction lens 4 a centripetal force toward the bias center position Bini. The speed bias data s1 is obtained by subtracting the bias center position Bini from the correction lens position information lr detected by the correction lens position detector 7, and then multiplying the result by a speed bias table. The bias center position Bini is a variable.
[0022]
Here, the speed bias table will be described.
FIG. 4 is a diagram showing a speed bias table used in the speed bias processing unit 22. The horizontal axis is the correction lens position lr, and the vertical axis is the speed bias data s1.
The speed bias data s1 is a cubic function of the correction lens position lr. The speed bias constant KB has two kinds of constants, namely, KB1 for normal photographing and KB2 for three-legged determination. The relationship between KB1 and KB2 is KB1 <KB2, and the center bias force acts more strongly during the tripod determination. This is to prevent the blur correction lens 4 from excessively moving due to the drift of the angular velocity sensor 3 due to the small amount of blur when the tripod is fixed.
Further, in the present embodiment, the speed bias table is a cubic function, but may be a quadratic function or a linear function. It is obvious that equivalent results can be obtained by using the correction lens target position lc instead of the correction lens position lr in the calculation of the speed bias data s1.
[0023]
Returning to the description of FIG. After subtracting the velocity bias data s1 from the angular velocity data ω3 (assuming that the angular velocity data ω4 = ω3−s1), the target velocity conversion unit 23 outputs the focal length information f obtained from the zoom encoder 24 and the subject obtained by the focusing encoder 25 ( Based on the (absolute) distance information D and the lens-specific information α written in the EEPROM 26, the angular velocity data ω4 is converted into target velocity information Vc of the blur correction lens 4.
The target speed information Vc is calculated by the following equation.
Vc = β × D × ω4 / α
β: lateral magnification (value calculated from focal length information f and subject distance information D)
α: blur correction coefficient (correction ratio on the film surface with respect to the driving amount of the blur correction lens 4)
The target speed information Vc of the blur correction lens 4 is input to the integration calculating unit 27, converted into target position information lc, and input to the control unit 28. The control unit 28 performs tracking control so that the blur correction lens 4 is driven according to the target position information lc of the blur correction lens 4. The input unit of the control unit 28 is the target position information lc of the blur correction lens 4, and the other input unit is the position information lr of the blur correction lens 4 obtained by the correction lens position detection unit 7.
[0024]
The control unit 28 performs the PID control using the deviation between the target position information lc of the blur correction lens 4 and the lens position information lr.
FIG. 5 is a block diagram illustrating the operation principle of the control unit 28.
The control unit 28 first subtracts the lens position information lr from the target position information lc, and multiplies the value by a proportional constant Kp (proportional term).
Further, the result obtained by subtracting the lens position information lr from the target position information lc and the information obtained by subtracting one sample before are added, and the resulting value is multiplied by an integration constant Ki (integral term).
Further, from the result of subtracting the lens position information lr from the target position information lc, the subtracted information before one sampling is subtracted, and the resulting value is multiplied by a differential constant Kd (differential term). Here, Z indicates Z conversion, and 1 / Z indicates information one sample before.
All of the result of multiplying the result of multiplication by the proportional constant Kp, the result of multiplication by the integral constant Ki, and the result of multiplication by the differential constant Kd are added to obtain the output of the PID control unit.
[0025]
Returning to the description of FIG. The output of the control unit 28 is input as a digital drive signal to the voltage drivers 32x and 32y via a D / A converter. The voltage driver 32x performs switching on the drive signal, applies a voltage to a coil unit (not shown) of the drive VCM 6 of the blur correction lens 4, and drives the VCM 6. The position of the blur correction lens 4 is monitored by the correction lens position detection unit 7 and is fed back to the control unit 28 in the lens CPU 20 via the A / D converter. Further, the lens CPU 20 controls the energization of the lock unit 8 via the voltage driver 32y, and can issue a drive instruction for locking and unlocking the blur correction lens 4.
[0026]
The lens CPU 20 communicates with the body CPU 40 via the lens contact 33. Information of the release switch 41 is input to the body CPU 40, and it is possible to detect whether the release switch 41 is half-pressed or fully pressed. A shake correction start command is sent from the body CPU 40 to the lens CPU 20 in synchronization with the half-press ON of the release switch 41, and a shake correction stop command is sent to the lens CPU 20 in synchronization with the half-press OFF.
[0027]
The lens CPU 20 monitors the state of the shake correction SW 15. The lens CPU 20 performs the shake correction control when the shake correction SW 15 is ON, and does not perform the shake correction control by ignoring the shake correction start command from the camera 2 when the shake correction SW 15 is OFF.
[0028]
Next, a blur determination method will be described.
FIG. 6 is a diagram showing the blur determination process in detail. This process corresponds to step S104 in FIG. 7 described later.
The blur determination is for determining whether the camera is in a hand-held state or a state in which the camera is fixed to a tripod or the like. The blur determination is performed on the angular velocity data ω3 (see FIG. 1) from which the drift component of the angular velocity sensor 3 has been removed. Further, the angular velocity data ω3 detected when the hand is held has a larger amplitude and a lower frequency than when it is fixed to a tripod or the like. On the other hand, the angular velocity data ω3 detected when it is fixed has a small amplitude and a high frequency.
[0029]
Thus, as shown in FIG. 6, a threshold value ωk is set for the amplitude value, the amplitude value is fetched at the sampling interval st, the magnitude of the threshold value ωk is compared with the magnitude of the amplitude value, and the number of times greater than the threshold value is counted for a certain period of time. (N × st time) is counted.
In the figure, the part circled is counted. If the count k becomes larger than a certain threshold r within a certain period of time (r << k), it is determined that the camera shake is occurring. Conversely, if the count is r> k, it is determined that the three legs are fixed. When the determination is completed, the count k is reset to zero.
[0030]
FIG. 7 is a flowchart illustrating a method of selecting a bias center position in the shake correction system 100 according to the present invention. The following steps (S101 to S113) indicate each process of the lens CPU 20. The flowchart is shown from the time when the blur correction SW 15 is ON, the release half-press is turned ON, and the blur correction is started.
[0031]
In step S101, an initial value is set. In the initial setting, the cutoff frequency fc = LPF2 and the bias constant KB = KB2 for the three legs are set. Also, the bias center position Bini is set to the lock center position, the target lens position lc is set to the lock center position, and FLAG = 1 is set.
Here, the FLAG will be described. When the cutoff frequency and the bias constant for fixing the tripod are set, the FLAG is set to FLAG = 1, while the cutoff frequency and the bias constant for the camera shake are set. In this case, FLAG = 0 is set.
[0032]
In step S102, the control is started, and the blur correction lens 4 moves toward the target lens position lc (in this case, the lock center position), so that the lock can be released.
In step S103, the lock is released.
In step S104, a blur determination is made (see FIG. 6). If it is determined that the camera shake is caused, the process proceeds to step S105, and if it is determined that the tripod is fixed, the process proceeds to step S106.
In step S105, the camera shake cutoff frequency fc = LPF1, the bias constant KB = KB1, and the bias center position Bini are set to the lock center position. In the next step S107, FLAG is set to 0, and the process proceeds to step S110.
[0033]
On the other hand, when it is determined in step S104 that the three legs are fixed in the shake determination, the process proceeds to step S106, and it is determined whether FLAG = 0. If FLAG = 0 is Yes, it means that the camera shake was determined in the previous shake determination, so the process proceeds to the next step S108, where fc = LPF2 for three legs, a bias constant KB = KB2, and a bias The center position Bini is set to the current lens position lr.
However, the bias center position Bini needs to have a margin with respect to the soft limit of the blur correction lens 4. The reason is that when the blur correction lens 4 reaches the soft limit, the blur correction effect is lost. Specifically, when the bias center position Bini is in the vicinity of the soft limit, the blur correction lens 4 operates with the bias center position Bini as the drive center, and the possibility that the blur correction lens 4 reaches the soft limit is high. It is assumed that it will become.
[0034]
In step S109, FLAG = 1 is set, and the process proceeds to step S110. If FLAG = 0 is determined to be No in step S106, it means that the tripod is determined to be fixed in the previous shake determination, and the bias center position Bini is not reset, and the process directly proceeds to step S109. move on. In step S109, FLAG = 1 is set, and the process proceeds to step S110.
[0035]
In step S110, it is determined whether or not the blur correction is stopped. If Yes, the process proceeds to step S111, where the blur correction lens 4 is moved to a lockable position, and the control is stopped. Locking is performed in the following step S112, and END is set in step S113. On the other hand, if NO, the blur correction is continued, and the process returns to step S104 again to determine blur.
[0036]
Next, the effect of changing the bias center position Bini will be described with reference to FIG. FIG. 8A is a waveform diagram of a conventional example in which the bias center position cannot be changed, and FIG. 8B is a waveform diagram of the present embodiment in which the bias center position can be changed. The horizontal axis is time and the vertical axis is the position lr of the blur correction lens 4.
Here, the area a in the figure indicates an area where the blurring is large and the tripod fixing determination is not performed, and the area b in the figure indicates an area where the tripod fixing determination is performed. As a specific example of this situation, as a result of performing an operation such as a command dial while the camera is fixed to the tripod, the camera shakes greatly, it is determined that the camera shake, and the camera shake correction is performed (a region in the figure). Then, the shaking gradually decreases, the three-legged fixed determination is made, and the three-legged shake correction is performed (region b in the drawing).
[0037]
A waveform X in FIG. 8A is a waveform when the bias center position is set to only one position lr0 which is the center position of the movable range of the blur correction lens 4 (conventional example). In the conventional example, as shown in the waveform X, when it is determined that the three legs are fixed, the blur correction lens 4 is centered, and thus moves from the current lens position + lr1 toward the bias center position lr0. At this time, the image in the finder also moves with the movement of the blur correction lens 4. This movement of the centering is difficult to understand because the amount of blur is large when the camera is held by hand, but is noticeable when the tripod is fixed because the amount of blur is small.
[0038]
On the other hand, a waveform Y in FIG. 8B is a waveform shown in the present embodiment when the bias center position Bini can be changed.
According to the present embodiment, as shown in the waveform Y, when the three-legged determination is made, the bias center position Bini is reset from the initially set lr0 to the current correction lens position of the blur correction lens 4 + lr1. By biasing the current position of the blur correction lens 4 as a center, it is possible to suppress the blur correction lens 4 from starting to move toward the lock center position, thereby suppressing an unpleasant movement of the image.
[0039]
【The invention's effect】
As described in detail above, (1) the target position signal based on the position information of the shake correcting unit obtained from the position detecting unit or the target position signal of the shake correcting unit obtained from the output of the shake detecting unit. In this case, the blur correction unit is biased toward the predetermined centripetal position, and the bias position can be corrected. Therefore, when the tripod is fixed, the blur correction lens starts moving toward the movable center. And the unpleasant movement of the image can be suppressed.
[0040]
(2) When the three legs are fixed, the center position of the blur correction lens at the time of the determination is set to the centroid position, so that the movement distance of the blur correction lens can be reduced.
[0041]
(3) When the tripod is fixed, the bias amount of the blur correction lens toward the centripetal position is increased, so that the blur correction lens can be prevented from moving excessively.
[0042]
(4) When the tripod is fixed, the parameter of the low-pass filter is changed to the high frequency side, so that noise components are removed from the high frequency due to the tripod blur, and the centroid position of the blur correction lens is calculated with high accuracy. Can be.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an outline of an embodiment of a shake correction system 100 according to the present invention.
FIG. 2 is a view showing a support structure of the angular velocity sensor 3;
FIG. 3 is a diagram illustrating frequency distributions of drift, hand shake, and three-leg shake of the angular velocity sensor 3;
FIG. 4 is a diagram showing a speed bias table used in a speed bias processing unit 22;
FIG. 5 is a block diagram showing the operation principle of the control unit 28.
FIG. 6 is a diagram showing the details of a shake determination process.
FIG. 7 is a flowchart illustrating a method of selecting a bias center position in the shake correction system 100 according to the present invention.
8A is a waveform diagram of a conventional example in which the bias center position cannot be changed, and FIG. 8B is a waveform diagram of the present embodiment in which the bias center position can be changed.
FIG. 9 is a conceptual diagram of a shake correction system for correcting camera shake.
[Explanation of symbols]
3 angular velocity sensor 4 blur correction lens 6 VCM
7 Correction lens position detection unit 20 Lens CPU
21 LPF processing section 22 Speed bias processing section 23 Lens target speed conversion section 27 Integral calculation section 28 Control section 31 Low pass filter 100 Shake correction system Ic Correction lens target position Ir Correction lens position

Claims (4)

A shake detection unit for detecting a shake,
A shake correction unit for correcting image blur,
A drive unit for driving the shake correction unit;
A position detection unit that detects a position of the shake correction unit;
A drive control unit that calculates a target position signal of the shake correction unit from an output of the shake detection unit and controls the drive unit based on the target position signal;
A bias unit that provides a bias to the target position signal based on the position information or the target position signal obtained from the position detection unit so that the shake correction unit moves toward a predetermined centripetal position;
A bias correction unit that corrects the centripetal position of the bias unit;
Image stabilization device equipped with The blur correction device according to claim 1,
From the output of the shake detection unit, a support state determination unit that determines whether the support state of the device equipped with the shake correction device is hand-held or fixed,
The bias correction unit, when the support state determination unit determines that the fixed, the center position of the bias unit, the center position of the blur correction unit at the time of the determination,
A blur correction device characterized by the above-mentioned. The blur correction device according to claim 1 or 2,
The bias correction unit, when the support state determination unit determines that the fixed, to increase the amount of bias toward the centripetal position,
A blur correction device characterized by the above-mentioned. The blur correction device according to any one of claims 1 to 3,
A low-pass filter that removes a high-frequency noise component of the signal detected by the shake detection unit,
The drive control unit, when the support state determination unit determines that the fixed, to change the parameter of the low-pass filter to the high frequency side,
A blur correction device characterized by the above-mentioned.

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