JP2017134190A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an appropriate image tremor correction even when a movie shot is taken with an electrically-driven gimbals stabilizer mounted, or when the movie shot is taken on a moving body such as a ship and the like.SOLUTION: An imaging device, which corrects an image tremor during movie shooting using an optical tremor correction unit, comprises: a tremor detection unit that detects a tremor of the imaging device to output a tremor signal; a signal separation unit that separates the tremor signal into at least two signals of a first tremor signal and second tremor signal depending upon a frequency band; a tremor correction control unit that performs drive control of the optical tremor correction unit on the basis of the tremor signal; and a mode setting unit that sets a tremor correction mode. The first tremor signal serves as the tremor signal of a high frequency band, and when a first tremor correction mode is set as the tremor correction mode by the mode setting unit, the tremor correction control unit is configured to perform the drive control of the optical tremor correction unit only based on the first tremor signal is configured to only based on the first tremor signal separated by the signal separation unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an imaging apparatus that corrects image blur using an optical blur correction mechanism.

Conventionally, image blur due to camera shake during movie shooting is detected by the angular velocity output obtained from shake detection means such as an angular velocity sensor, and the image blur is corrected by driving the optical blur correction mechanism based on the detected angular velocity value. An imaging device is known.
For example, Patent Document 1 discloses means for accurately correcting image blur even during panning operation during moving image shooting. Specifically, there are two frequency regions for angular velocity output by the shake detection means. An image pickup apparatus is disclosed that extracts signals separated from each other, calculates an amount of driving an optical blur correction mechanism by a correction lens from each of the extracted signals, and accurately corrects image blur even during panning. Further, for example, in Patent Document 2, an offset value for an angular velocity output is corrected at the time of panning with respect to an angular velocity output by a shake detection unit, and a correction lens in an optical shake correction mechanism is based on the corrected angular velocity. An image pickup apparatus is disclosed that performs shake correction by calculating the amount of movement and moving the correction lens in a plane perpendicular to the optical axis.

There are various situations in which moving image shooting is performed using such an imaging apparatus.
For example, there are moving image shooting in a state where a gimbal stabilizer is attached to the imaging device, moving image shooting on a moving body such as a ship. The gimbal stabilizer is a device that stabilizes the posture of the imaging device by balancing the center of gravity of the imaging device to be mounted. In recent years, an electric gimbal stabilizer (hereinafter referred to as an “electric gimbal stabilizer”) has a posture detection unit and a function of maintaining a mounted imaging device in a predetermined posture according to the posture detection result. ") Is known.

JP2015-105975A JP 2015-31779 A

However, there are the following problems in moving image shooting with an electric gimbal stabilizer attached and moving image shooting on a moving body such as a ship.
In movie shooting with the electric gimbal stabilizer attached, if the posture maintenance function by the electric gimbal stabilizer and the image blur correction function by the imaging device operate in parallel, excessive image blur correction will be performed, which is appropriate. Image blur correction cannot be performed. Therefore, a method of turning off (not operating) the image blur correction function of the imaging apparatus and operating only the attitude maintaining function of the electric gimbal stabilizer is conceivable. However, in this method, even if it is possible to correct image blur due to low-frequency posture change in which the posture maintenance function by the electric gimbal stabilizer works effectively, the electric gimbal stabilizer to which the imaging device is mounted is gripped. Image blur caused by high-frequency posture changes due to small tremors of the hand cannot be corrected.

  In moving image shooting on a moving body such as a ship, image blur correction is performed with the movement of the moving body as a change in the attitude of the imaging device. As a result, excessive image blur correction is performed, and appropriate image blur correction cannot be performed. Therefore, in such a case, a method of turning off the image blur correction function by the imaging device is conceivable. However, in this method, an image caused by camera shake other than the shaking of the moving body (eg, small trembling of the hand). Blur cannot be corrected.

  In view of the above situation, the present invention can perform appropriate image blur correction even when an electric gimbal stabilizer is attached and moving image shooting is performed or when moving image shooting is performed on a moving body such as a ship. An object is to provide an imaging device.

  A first aspect of the present invention is an imaging device that corrects image blur during moving image shooting using an optical blur correction unit, and detects a blur of the imaging device and outputs a blur signal; , A signal separation unit that separates the blur signal into at least two of a first blur signal and a second blur signal according to a frequency band; and a blur correction that drives and controls the optical blur correction unit based on the blur signal. A control unit and a mode setting unit for setting a blur correction mode, wherein the first blur signal is a blur signal in a high frequency band, and the mode setting unit sets the first blur correction mode as the blur correction mode. When set, an imaging apparatus is provided in which the blur correction control unit drives and controls the optical blur correction unit based only on the first blur signal separated by the signal separation unit.

  According to a second aspect of the present invention, in the first aspect, there is a mounting portion on which the camera shake correction device is mounted, and mounting detection for detecting that the camera shake correction device that has been activated is mounted on the mounting portion. An imaging unit, wherein the mode setting unit sets the first blur correction mode as the blur correction mode when the mounting detection unit detects that the activated camera shake correction device is mounted. Providing equipment.

  According to a third aspect of the present invention, in the second aspect, the second shake signal is a shake signal in a low frequency band, and the wearing detection unit detects the wearing of the activated camera shake correction device. In such a case, an image pickup apparatus is provided in which the second shake signal is transmitted to the camera shake correction device, and the camera shake correction device performs camera shake correction based on the second shake signal.

  According to a fourth aspect of the present invention, in the second aspect, the blur detection unit includes an angular velocity sensor, and the attachment detection unit is activated on the attachment unit based on an output signal of the angular velocity sensor. An imaging device for detecting that a camera shake correction device is mounted is provided.

  According to a fifth aspect of the present invention, in the second aspect, the blur detection unit includes an angular velocity sensor and an acceleration sensor, and the attachment detection unit is based on an output signal of the angular velocity sensor and an output signal of the acceleration sensor. And providing an imaging device for detecting that the activated camera shake correction device is mounted on the mounting portion.

  According to a sixth aspect of the present invention, in the second aspect, the attachment detection unit is activated in the attachment unit by communicating with the activated camera shake correction device attached in the attachment unit. An image pickup apparatus that detects that the camera shake correction apparatus is attached is provided.

  According to a seventh aspect of the present invention, in the first aspect, the apparatus further includes an operation unit that receives a user operation, and the mode setting unit is set as the operation mode according to the user operation received by the operation unit. An imaging apparatus for setting one operation mode is provided.

  Advantageous Effects of Invention According to the present invention, it is possible to perform appropriate image blur correction even when moving image shooting is performed with an electric gimbal stabilizer attached or when moving image shooting is performed on a moving body such as a ship. Play.

It is a figure which shows the structural example of the camera system containing the camera which is an imaging device which concerns on 1st Embodiment. It is a flowchart which shows an example of the operation | movement which sets the camera-shake correction mode at the time of video recording based on 1st Embodiment. It is a figure which shows the example of an operation screen based on 1st Embodiment. In the first embodiment, it is an example of a blur signal output by a gyro sensor of a camera when an activated gimbal is attached to the camera. 6 is an example of a shake signal output by a gyro sensor of a camera when the activated gimbal is not attached to the camera in the first embodiment. It is a figure which shows the structural example of the camera system containing the camera which is an imaging device which concerns on 2nd Embodiment. It is a flowchart which shows an example of the operation | movement which sets the camera-shake correction mode at the time of video recording based on 2nd Embodiment. It is a figure which shows the structural example of the camera system containing the camera which is an imaging device which concerns on 3rd Embodiment. It is a flowchart which shows an example of the operation | movement which sets the camera shake correction mode at the time of the video recording based on 3rd Embodiment. It is a figure which shows the example of a setting screen based on a modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
FIG. 1 is a diagram illustrating a configuration example of a camera system including a camera which is an imaging apparatus according to the first embodiment of the present invention.

As shown in FIG. 1, the camera system 10 includes a camera 100 and an electric gimbal stabilizer 200 (hereinafter simply referred to as “gimbal”).
Note that the configuration of the camera 100 illustrated in FIG. 1 is a main configuration related to the camera shake correction function included in the camera 100, and other configurations such as an imaging optical system and an image sensor are not illustrated. Omitted.

  The camera 100 includes a gyro sensor 101, an HPF (High Pass Filter) 102, an LPF (Low Pass Filter) 103, a switch unit 104, a camera shake correction control unit 105, a camera shake correction mechanism 106, a gimbal detection unit 107, a CPU (Central Processing). Unit) 108, a gimbal mounting unit 109, and an operation unit 110, and has a function of correcting image blur during moving image shooting.

  The gyro sensor 101 is an example of a shake detection unit, and is an angular velocity sensor that detects a shake (posture change) of at least two axes (for example, the Yaw direction and the Pitch direction) of the camera 100 and outputs respective shake signals. .

  The HPF 102 outputs only the high frequency band component of the blur signal output by the gyro sensor 101. The LPF 103 outputs only the low frequency band component of the blur signal output by the gyro sensor 101. The HPF 102 and the LPF 103 are an example of a signal separation unit, and have a function of separating the blur signal output from the gyro sensor 101 into a blur signal having a high frequency band component and a blur signal having a low frequency band component. .

The switch unit 104 connects (ON) or disconnects (OFF) a signal line between the LPF 103 and the camera shake correction control unit 105 under the control of the CPU 108.
Under the control of the CPU 108, the camera shake correction control unit 105 is based on the output signal of the HPF 102 (high-frequency band component blur signal) or the output signal of the HPF 102 and the output signal of the LPF 103 (low-frequency band component blur signal). Thus, the camera shake correction mechanism 106 is driven and controlled so that camera shake (image blur) is corrected.

  The camera shake correction mechanism 106 is an example of an optical camera shake correction unit, and is driven under the drive control of the camera shake correction control unit 105. The camera shake correction mechanism 106 is, for example, a mechanism that corrects camera shake by shifting a correction optical system in a photographing optical system (not shown) of the camera 100 in a direction perpendicular to the optical axis, or a camera 100 is not shown. This mechanism corrects camera shake by shifting the image sensor in a direction perpendicular to the optical axis. Alternatively, the camera shake correction mechanism 106 may include both mechanisms.

  Based on the shake signal output from the gyro sensor 101, the gimbal detection unit 107 detects whether the activated gimbal 200 is mounted on the gimbal mounting unit 109, and notifies the CPU 108 of the detection result. For example, the gimbal detection unit 107 indicates that the activated gimbal 200 is mounted on the gimbal mounting unit 109 when the blur signal output from the gyro sensor 101 is a blur signal in which a low frequency band component is suppressed. Is detected. This is because when the activated gimbal 200 (operating gimbal 200) is attached to the camera 100, the low frequency blur (posture change) of the camera 100 is suppressed by the action of the gimbal 200, and as a result, the camera This is because the low frequency band component of the blur signal output by the 100 gyro sensors 101 is suppressed.

  The CPU 108 controls the overall operation of the camera 100. For example, the CPU 108 sets mode 1 or mode 2 as the camera shake correction mode at the time of moving image shooting according to the detection result of the gimbal detection unit 107. Further, for example, the CPU 108 controls the switch unit 104 and the camera shake correction control unit 105 according to the set camera shake correction mode at the time of moving image shooting. More specifically, when the set camera shake correction mode is mode 1, the CPU 108 controls the switch unit 104 so that the switch unit 104 is turned off, and the camera shake correction control unit 105 outputs the output from the HPF 102. The camera shake correction control unit 105 is controlled so as to drive and control the camera shake correction mechanism 106 based only on the signal (the shake signal of the high frequency band component). In addition, when the camera shake correction mode that has been set is mode 2, the CPU 108 controls the switch unit 104 so that the switch unit 104 is turned on, and the camera shake correction control unit 105 outputs an output signal ( Based on the high frequency band component blur signal) and the output signal of the LPF 103 (low frequency band component blur signal), the camera shake correction control unit 105 is controlled to drive and control the camera shake correction mechanism 106.

The gimbal mounting portion 109 is a mount portion on which the gimbal 200 is mechanically mounted.
The operation unit 110 receives various operations from the user.
The gimbal 200 includes a gyro sensor 201, a CPU 202, and a camera shake correction mechanism 203.

  The gyro sensor 201 detects a shake (posture change) of at least two axes (for example, the Yaw direction and the Pitch direction) of a part of the gimbal 200 (a part to which the camera 100 is mounted), and outputs the respective shake signals. It is a sensor.

  The CPU 202 controls the overall operation of the gimbal 200. For example, the CPU 202 drives the camera shake correction mechanism 203 based on the shake signal output from the gyro sensor 201 so that a part of the gimbal 200 (a part to which the camera 100 is attached) is maintained in a predetermined posture. Control.

  The camera shake correction mechanism 203 is driven under the drive control of the CPU 202. The camera shake correction mechanism 203 is, for example, a mechanism that corrects camera shake by driving a part of the gimbal 200 (the part on which the camera 100 is mounted) in at least two axial directions (for example, the Yaw direction and the Pitch direction) ( A mechanism for maintaining the posture).

Next, the operation of the camera 100 will be described.
FIG. 2 is a flowchart illustrating an example of an operation for setting the camera shake correction mode during moving image shooting. FIG. 3 is a diagram showing an example of an operation screen displayed during the operation. FIG. 4 is an example of a shake signal output from the gyro sensor 101 when the activated gimbal 200 is attached to the camera 100. FIG. 5 is an example of a shake signal output by the gyro sensor 101 when the activated gimbal 200 is not attached to the camera 100.

In the camera 100, when the camera is activated (or when the shooting mode is switched to the moving image shooting mode, etc.), the operation shown in FIG.
As shown in FIG. 2, when this operation is started, the CPU 108 starts by resetting a built-in timer (t = 0), and displays on the display unit (not shown) of the camera 100, for example, as shown in FIG. The operation screen A is displayed (S11). On the operation screen A, a message for prompting the user to perform a camera operation for moving the camera 100 upward (tilting) is displayed, and the user starts the camera operation according to the message.

  Subsequently, the gimbal detection unit 107 measures the angular velocity value (here, the angular velocity value in the pitch direction) that is the value of the shake signal output from the gyro sensor 101, and the angular velocity value measured after the timer is started in S11. The average value (J) is calculated (S12).

Subsequently, the CPU 108 determines whether or not the timer value (t) is equal to or greater than a predetermined value (Tk: a value corresponding to, for example, 5 seconds) (t ≧ Tk?) (S13).
If the determination result in S13 is No, the process returns to S12.

  On the other hand, if the determination result in S13 is Yes, the CPU 108 displays, for example, the operation screen B shown in FIG. 3 on a display unit (not shown) of the camera 100 (S14). On the operation screen B, a message prompting the user to stop the camera operation for moving the camera 100 upward (tilting) is displayed, and the user stops the camera operation according to the message.

Subsequently, the gimbal detection unit 107 determines whether the absolute value (| J |) of the average value last calculated in S12 is less than a predetermined value (m) (| J | <m?) (S15). ).
When the determination result in S15 is Yes, the gimbal detection unit 107 detects that the activated gimbal 200 is mounted on the gimbal mounting unit 109, and the CPU 108 selects mode 1 as the camera shake correction mode at the time of moving image shooting. Set (S16). When the determination result in S15 is Yes, the angular velocity value measured in S12 during the period from the start of the timer in S11 until the determination result in S13 becomes Yes (during Tk time), for example, This is the case where the angular velocity value shown in FIG. In this case, the low frequency band component of the shake signal output from the gyro sensor 101 is suppressed by the action of the activated gimbal 200 attached to the camera 100, and the average value (J) calculated last in S12. Is a value near zero, and its absolute value (| J |) is less than a predetermined value (m).

  On the other hand, when the determination result in S15 is No, the gimbal detection unit 107 detects that the activated gimbal 200 is not mounted on the gimbal mounting unit 109, and the CPU 108 is set as a camera shake correction mode in moving image shooting. 2 is set (S17). When the determination result in S15 is No, the angular velocity value measured in S12 during the period from the start of the timer in S11 until the determination result in S13 becomes Yes (Tk time), for example, This is the case where the angular velocity value shown in FIG. In this case, since the activated gimbal 200 is not attached to the camera 100, the low frequency band component of the blur signal output from the gyro sensor 101 is not suppressed by the action of the gimbal 200, and the last in S12. The average value (J) calculated in (1) is not a value near zero, and its absolute value | J | is a value equal to or greater than a predetermined value (m).

Then, when S16 or S17 is completed, this operation ends.
When the camera shake correction mode at the time of moving image shooting is set in this way, at the time of moving image shooting, the camera shake correction according to the set camera shake correction mode is performed.

  More specifically, when mode 1 is set as the camera shake correction mode at the time of moving image shooting, in the camera shake correction at the time of moving image shooting, the switch unit 104 is turned off and the camera shake correction control unit 105 outputs an output signal (high frequency). Based on only the band component blur signal), the camera shake correction mechanism 106 is driven and controlled. Therefore, when mode 1 is set, camera shake correction at the time of moving image shooting is performed based only on the blur signal of the high frequency band component. In this case, image blur caused by low-frequency blur (posture change) of the camera 100 is corrected by the action of the gimbal 200.

  Alternatively, when mode 2 is set as the camera shake correction mode during moving image shooting, the switch unit 104 is turned on and the camera shake correction control unit 105 outputs an output signal (high-frequency band component) during camera shake correction during moving image shooting. ) And the output signal of the LPF 103 (low frequency band component blur signal), the camera shake correction mechanism 106 is driven and controlled. Therefore, when mode 2 is set, camera shake correction at the time of moving image shooting is performed based on the blur signal of the high frequency band component and the low frequency band component.

  As described above, according to the camera 100 according to the first embodiment, when the activated gimbal 200 is attached and moving image shooting is performed, image blur due to high-frequency blur (posture change) of the camera 100 is detected. The image blur caused by the low-frequency blur of the camera 100 is corrected by the gimbal 200. Therefore, even when the activated gimbal 200 is attached and moving image shooting is performed, appropriate image blur correction can be performed.

Note that the camera 100 according to the present embodiment may be modified as follows.
For example, in the operation illustrated in FIG. 2, if the determination result in S15 is Yes, and before S16, the CPU 108 may display a confirmation screen A (not shown) on a display unit (not shown) of the camera 100. Good. On the confirmation screen A, a message for confirming whether or not the mode 1 can be set as the camera shake correction mode is displayed to the user, and the user performs a predetermined operation via the operation unit 110. It may be instructed whether or not to set mode 1 as the camera shake correction mode. If the user gives an instruction to set mode 1, the process may proceed to S16. If an instruction not to set mode 1 is given, the process may proceed to S17.

  In the operation shown in FIG. 2, in S12, instead of calculating the average value of the measured angular velocity values, for example, the maximum absolute value of the measured angular velocity values may be acquired. Accordingly, in S15, instead of determining whether or not the absolute value of the average value last calculated in S12 is less than a predetermined value, for example, the maximum value acquired last in S12 is the predetermined value. You may make it determine whether it is less than.

In the operation illustrated in FIG. 2, as illustrated in the operation screen A and the operation screen B in FIG. 3, the user is prompted to perform a camera operation for moving the camera 100 upward. A camera operation for moving the camera 100 in the direction may be prompted. Further, the angular velocity value measured in S12 may be an angular velocity value in a direction other than the Pitch direction.
In FIG. 1, the gimbal detection unit 107 is configured to detect whether or not the activated gimbal 200 is mounted on the gimbal mounting unit 109 based on the shake signal output from the gyro sensor 101. . However, the blur signal is not limited to the output of the gyro sensor 101. For example, although not shown, the blur signal may be detected from a change in an image output from an image sensor in the camera 100.

<Second Embodiment>
A camera which is an imaging apparatus according to the second embodiment of the present invention is different in configuration and operation from the camera according to the first embodiment. Therefore, in the description of the second embodiment, the different points will be mainly described, and the same components as those described in the first embodiment will be described with the same reference numerals.

FIG. 6 is a diagram illustrating a configuration example of a camera system including a camera that is an imaging apparatus according to the second embodiment.
The camera system 10 shown in FIG. 6 differs from the camera system 10 shown in FIG.

  First, in the camera system 10 shown in FIG. 6, the camera 100 further includes an I / O (Input / Output) unit 111. The I / O unit 111 is an interface used for signal input / output with the gimbal 200. In the present embodiment, when the gimbal 200 is mounted on the gimbal mounting unit 109, the camera 100 and the gimbal 200 are electrically connected via the I / O unit 111, and between the camera 100 and the gimbal 200. The signal can be input and output. The gimbal detection unit 107 detects whether the activated gimbal 200 is mounted on the gimbal mounting unit 109 based on whether communication with the gimbal 200 (CPU 202) via the I / O unit 111 is possible. Also, the shake signal output by the LPF 103 can be output to the gimbal 200 (CPU 202) mounted on the gimbal mounting unit 109 via the I / O unit 111.

  In the camera system 10 shown in FIG. 6, the gimbal 200 does not include the gyro sensor 201. Accordingly, the CPU 202 keeps a part of the gimbal 200 (the part to which the camera 100 is mounted) in a predetermined posture based on the shake signal input from the camera 100 (LPF 103) via the I / O unit 111. As described above, the camera shake correction mechanism 203 is driven and controlled. Further, the CPU 202 communicates with the camera 100 (gimbal detection unit 107) via the I / O unit 111.

The other configuration of the camera system 10 shown in FIG. 6 is the same as that of the camera system 10 shown in FIG.
Next, the operation of the camera 100 according to the second embodiment will be described.

FIG. 7 is a flowchart illustrating an example of an operation for setting a camera shake correction mode during moving image shooting according to the present embodiment.
In the camera 100 according to the present embodiment, the operation shown in FIG. 7 is started when the camera is activated (or when the shooting mode is switched to the moving image shooting mode).

  As shown in FIG. 7, when this operation is started, the gimbal detection unit 107 attempts communication with the CPU 202 of the gimbal 200 via the I / O unit 111 (S21), and whether or not communication with the CPU 202 has been completed. Is determined (S22).

  When the determination result in S22 is Yes, the gimbal detection unit 107 detects that the activated gimbal 200 is mounted on the gimbal mounting unit 109, and the CPU 108 selects mode 1 as a camera shake correction mode during movie shooting. Set (S23).

After S23, transmission of a blur signal, which is an output signal of the LPF 103, from the LPF 103 to the CPU 202 via the I / O unit 111 is started (S24).
On the other hand, if the determination result in S22 is No, the gimbal detection unit 107 detects that the activated gimbal 200 is not mounted on the gimbal mounting unit 109, and the CPU 108 is set as a camera shake correction mode during movie shooting. 1 is set (S25).

Then, when S24 or S25 is completed, this operation ends.
When the camera shake correction mode at the time of moving image shooting is set in this way, at the time of moving image shooting, camera shake correction corresponding to the set camera shake correction mode is performed as in the first embodiment. .

  As described above, according to the camera 100 according to the second embodiment, as in the case of the camera 100 according to the first embodiment, even when the activated gimbal 200 is attached and video shooting is performed, it is appropriate. Image blur correction can be performed.

<Third Embodiment>
A camera which is an imaging apparatus according to the third embodiment of the present invention is different in configuration and operation from the camera according to the first embodiment. Therefore, in the description of the third embodiment, the different points will be mainly described, and the same components as those described in the first embodiment will be described with the same reference numerals.

FIG. 8 is a diagram illustrating a configuration example of a camera system including a camera which is an imaging apparatus according to the third embodiment.
The camera system 10 shown in FIG. 8 differs from the camera system 10 shown in FIG. 1 in the following points.

  First, in the camera system 10 shown in FIG. 8, the camera 100 further includes an acceleration sensor 112. The acceleration sensor 112 detects a shake (posture change) in the translation direction of the camera 100 and outputs the shake signal. In the present embodiment, the gyro sensor 101 and the acceleration sensor 112 are an example of a shake detection unit.

  Also, the gimbal detection unit 107 determines whether the activated gimbal 200 is mounted on the gimbal mounting unit 109 based on the blur signal output from the gyro sensor 101 and the blur signal output from the acceleration sensor 112. It detects and notifies the CPU 108 of the detection result. For example, the gimbal detection unit 107 detects that the activated gimbal 200 is mounted on the gimbal mounting unit 109 as follows.

  When the activated gimbal 200 is not mounted on the gimbal mounting portion 109, the maximum value per predetermined time of the angular velocity value that is the output signal of the gyro sensor 101 of the camera 100 and the acceleration value that is the output signal of the acceleration sensor 112 are The maximum value per predetermined time increases or decreases with a correlation (for example, a proportional relationship). On the other hand, when the activated gimbal 200 is attached to the gimbal attachment unit 109, the maximum value per predetermined time of the angular velocity value that is the output signal of the gyro sensor 101 is attached to the gimbal attachment unit 109. It becomes a suppressed value (small value) compared with the case where it is not done. On the other hand, the maximum value per predetermined time of the acceleration value that is the output signal of the acceleration sensor 112 is not suppressed by the action of the activated gimbal 200 and does not change depending on whether or not the activated gimbal 200 is attached. . Therefore, in consideration of these, the maximum value (Jmax) of the angular velocity value that is the output signal of the gyro sensor 101 per predetermined time and the maximum value (Amax) of the acceleration value that is the output signal of the acceleration sensor 112 per predetermined time (Amax). The ratio (Amax / Jmax) is calculated, and when the ratio exceeds a predetermined threshold, it is detected that the activated gimbal 200 is mounted on the gimbal mounting portion 109.

  In the camera 100 shown in FIG. 8, the camera shake correction control unit 105 controls the hand based on the output signal of the HPF 102 (the blur signal of the high frequency band component) and the output signal of the acceleration sensor 112 under the control of the CPU 108. The camera shake correction mechanism 106 is driven and controlled so that the shake (image shake) is corrected. Alternatively, the camera shake correction control unit 105, under the control of the CPU 108, outputs an output signal of the HPF 102 (high frequency band component blur signal), an output signal of the LPF 103 (low frequency band component blur signal), and the output of the acceleration sensor 112. Based on the signal, the camera shake correction mechanism 106 is driven and controlled so that the camera shake (image shake) is corrected.

The other configuration of the camera system 10 shown in FIG. 8 is the same as that of the camera system 10 shown in FIG.
Next, the operation of the camera 100 according to the third embodiment will be described.

FIG. 9 is a flowchart illustrating an example of an operation for setting a camera shake correction mode during moving image shooting according to the present embodiment.
In the camera 100 according to the present embodiment, the operation shown in FIG. 9 starts when the camera is activated (or when the shooting mode is switched to the moving image shooting mode, etc.).

As shown in FIG. 9, when this operation starts, the CPU 108 starts by resetting a built-in timer (t = 0), and displays an operation screen C (not shown) on a display unit (not shown) of the camera 100. It is displayed (S31). On the operation screen C, a message prompting the user to operate the camera to move the camera 100 (for example, tilting upward) is displayed, and the user starts the camera operation according to the message.
Subsequently, the gimbal detection unit 107 measures the angular velocity value (for example, the angular velocity value in the pitch direction) that is the value of the shake signal output from the gyro sensor 101, and the absolute value of the angular velocity value measured after the timer is started in S31. The maximum value (Jmax) is acquired (S32).

  Subsequently, the gimbal detection unit 107 measures an acceleration value (for example, an acceleration value in the vertical direction) that is the value of the shake signal output from the acceleration sensor 112, and the absolute value of the acceleration value measured after the timer is started in S31. The maximum value (Amax) is acquired (S33).

Note that either of S32 and S33 may be performed first or may be performed in parallel.
Subsequently, the CPU 108 determines whether or not the timer value (t) is equal to or greater than a predetermined value (Tk: a value corresponding to, for example, 5 seconds) (t ≧ Tk?) (S34).

If the determination result in S34 is No, the process returns to S32.
On the other hand, when the determination result in S34 is Yes, the CPU 108 displays an operation screen D (not shown) on a display unit (not shown) of the camera 100 (S35). On the operation screen D, a message prompting the user to stop the camera operation for moving the camera 100 (for example, tilting upward) is displayed, and the user stops the camera operation according to the message.

Subsequently, the gimbal detection unit 107 determines whether or not the maximum value (Jmax) acquired last in S32 is less than a predetermined value (n) (Jmax <n?) (S36).
If the determination result in S36 is No, the gimbal detection unit 107 detects that the activated gimbal 200 is not mounted on the gimbal mounting unit 109, and the process proceeds to S41.

  On the other hand, when the determination result in S36 is Yes, the gimbal detection unit 107 has a predetermined ratio (Amax / Jmax) between the maximum value (Jmax) acquired last in S32 and the maximum value (Amax) acquired last in S33. It is determined whether or not the value (k) is exceeded (Amax / Jmax> k) (S37).

When the determination result in S37 is No, the gimbal detection unit 107 detects that the activated gimbal 200 is not mounted on the gimbal mounting unit 109, and the process proceeds to S41.
On the other hand, when the determination result in S37 is Yes, the gimbal detection unit 107 detects that the activated gimbal 200 is mounted on the gimbal mounting unit 109, and the CPU 108 displays on the display unit (not illustrated) of the camera 100. A confirmation screen B is displayed (S38). On the confirmation screen B, a message for confirming whether or not the mode 1 can be set as the camera shake correction mode is displayed to the user. Instructs whether or not to set mode 1 as the shake correction mode.

Subsequently, the CPU 108 determines whether or not the user has instructed setting of the mode 1 as the camera shake correction mode (S39).
When the determination result in S39 is Yes, the CPU 108 sets mode 1 as the camera shake correction mode at the time of moving image shooting (S40).

  On the other hand, when the determination result of S39 is No (or when the determination result of S36 is No or when the determination result of S37 is No), the CPU 108 sets mode 2 as the camera shake correction mode at the time of moving image shooting. (S41).

Then, when S40 or S41 is completed, this operation ends.
When the camera shake correction mode at the time of moving image shooting is set in this way, at the time of moving image shooting, camera shake correction according to the set camera shake correction mode is performed in substantially the same manner as in the first embodiment. Is called.

  More specifically, when mode 1 is set as the camera shake correction mode at the time of moving image shooting, in the camera shake correction at the time of moving image shooting, the switch unit 104 is turned off and the camera shake correction control unit 105 outputs an output signal (high frequency). The camera shake correction mechanism 106 is driven and controlled based on the band component blur signal) and the output signal of the acceleration sensor 112. Therefore, when mode 1 is set, for the shake (posture change) detected by the gyro sensor 101, only the high-frequency band component of the shake signal output by the gyro sensor 101 is used during moving image shooting. Camera shake correction is performed. In this case, the image blur caused by the blur corresponding to the low frequency band component of the blur signal output from the gyro sensor 101 is corrected by the action of the gimbal 200.

  Alternatively, when mode 2 is set as the camera shake correction mode during moving image shooting, the switch unit 104 is turned on and the camera shake correction control unit 105 outputs an output signal (high-frequency band component) during camera shake correction during moving image shooting. The image stabilization mechanism 106 is driven and controlled based on the output signal of the LPF 103 (the blur signal of the low frequency band component) and the output signal of the acceleration sensor 112. Therefore, when mode 2 is set, a shake signal (high-frequency band component and low-frequency band component shake signal) output by the gyro sensor 101 is used for a shake (posture change) detected by the gyro sensor 101. Based on this, camera shake correction at the time of moving image shooting is performed.

  As described above, according to the camera 100 according to the third embodiment, when the activated gimbal 200 is attached and moving image shooting is performed, a high-frequency blur is detected in the blur (posture change) detected by the gyro sensor 101. The camera shake is corrected by the camera 100, and the image blur caused by the low frequency blur is corrected by the gimbal 200. As described above, the blur detected by the acceleration sensor 112 does not change depending on whether or not the activated gimbal 200 is attached. Therefore, even when the activated gimbal 200 is attached and moving image shooting is performed, appropriate image blur correction can be performed.

Note that the camera 100 according to the present embodiment may be modified as follows.
For example, S38 and S39 may be omitted in the operation shown in FIG.
In the operation shown in FIG. 9, in S32, instead of obtaining the maximum value of the absolute values of the measured angular velocity values, for example, an average value (J) of the measured angular velocity values is calculated, and in S33, Instead of obtaining the maximum absolute value of the measured acceleration values, for example, an average value (A) of the measured acceleration values may be calculated. Accordingly, in S36, instead of determining whether or not the maximum value finally acquired in S32 is less than a predetermined value, for example, the absolute value (| J |) of the average value calculated last in S32 is used. Is determined to be less than a predetermined value (m) (| J | <m). In S37, the ratio between the maximum value acquired last in S32 and the maximum value acquired last in S33 is predetermined. Instead of determining whether or not the value is exceeded, for example, the absolute value (| A / J |) of the ratio between the average value (J) calculated last in S32 and the average value (A) calculated last in S33 ) May exceed a predetermined value.

Although the first, second, and third embodiments have been described above, the camera 100 according to each embodiment may be modified as follows.
For example, in order to enable the user to freely set the camera shake correction mode at the time of moving image shooting, the mode 1 or mode is set as the camera shake correction mode at the time of moving image shooting according to the operation of the operation unit 110 by the user 2 may be set. In this case, for example, a setting screen as shown in FIG. 10 is displayed on a display unit (not shown) of the camera 100 according to the user's operation, and the camera shake correction mode is set according to the selected button. You may be made to be. In the example shown in FIG. 10, when the OFF button 113a is selected, camera shake correction is not performed during moving image shooting. When the mode 1 button 113b is selected, the camera shake correction mode during moving image shooting is set. Mode 1 is set, and when the mode 2 button 113c is selected, mode 2 is set as a camera shake correction mode at the time of moving image shooting.

  According to such a modification, for example, when shooting a moving image on a moving object such as a ship using a shooting object on the moving object as a subject, if the user sets mode 1 in advance, Image blur caused by low-frequency camera shake (posture change) due to the shaking of the moving object that causes low-frequency shaking is not corrected, and camera shake other than the shaking of the moving object (such as small shaking of the hand) The image blur caused by the high-frequency blur of the camera 100 is corrected. Therefore, even when moving image shooting is performed on a moving body such as a ship, appropriate image blur correction can be performed.

  In addition, in the camera 100 according to such a modification, for example, although it is assumed that moving image shooting is performed on a moving body such as a ship, it is not assumed that moving image shooting is performed with the gimbal 200 attached. The configuration for detecting whether or not the activated gimbal 200 is attached may be omitted from the camera 100.

  As described above, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, you may delete some components of all the components shown by embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

10 Camera System 100 Camera 101 Gyro Sensor 102 HPF
103 LPF
104 Switch unit 105 Camera shake correction control unit 106 Camera shake correction mechanism 107 Gimbal detection unit 108 CPU
109 Gimbal mounting section 110 Operation section 111 I / O section 112 Acceleration sensor 113a OFF button 113b Mode 1 button 113c Mode 2 button 200 Gimbal 201 Gyro sensor 202 CPU
203 Camera shake correction mechanism

Claims (7)

An imaging device that corrects image blur during moving image shooting using an optical blur correction unit,
A blur detection unit that detects a blur of the imaging device and outputs a blur signal;
A signal separator that separates the blur signal into at least two of a first blur signal and a second blur signal according to a frequency band;
A blur correction control unit that drives and controls the optical blur correction unit based on the blur signal;
A mode setting section for setting the image stabilization mode;
With
The first blur signal is a blur signal in a high frequency band,
When the first blur correction mode is set as the blur correction mode by the mode setting unit, the optical compensation based on only the first blur signal separated by the signal separation unit by the blur correction control unit. Drive and control the dynamic blur correction unit,
An imaging apparatus characterized by that. A mounting part to which the camera shake correction device is mounted;
An attachment detection unit for detecting that the activated camera shake correction device is attached to the attachment unit;
Further comprising
When the mounting detection unit detects that the activated camera shake correction device is mounted, the mode setting unit sets the first camera shake correction mode as the camera shake correction mode.
The imaging apparatus according to claim 1. The second blur signal is a blur signal in a low frequency band,
When wearing of the activated camera shake correction apparatus is detected by the wearing detection unit, the second shake signal is transmitted to the camera shake correction apparatus,
In the camera shake correction device, camera shake correction is performed based on the second shake signal.
The imaging apparatus according to claim 2. The blur detection unit includes an angular velocity sensor,
The mounting detection unit detects that the activated camera shake correction device is mounted on the mounting unit based on an output signal of the angular velocity sensor.
The imaging apparatus according to claim 2. The blur detection unit includes an angular velocity sensor and an acceleration sensor,
The mounting detection unit detects that the camera shake correction device that has been activated is mounted on the mounting unit based on an output signal of the angular velocity sensor and an output signal of the acceleration sensor.
The imaging apparatus according to claim 2. The attachment detection unit detects that the activated camera shake correction device is attached to the attachment unit by communicating with the activated image stabilization device attached to the attachment unit. ,
The imaging apparatus according to claim 2. An operation unit that accepts user operations,
Further comprising
The mode setting unit sets the first operation mode as the operation mode in response to a user operation received by the operation unit.
The imaging apparatus according to claim 1.