Imaging apparatus and operation method thereof
The imaging apparatus includes an imaging sensor, a detection sensor that detects rotational shake in the roll direction, a mechanical vibration-proof mechanism that corrects rotational shake, and a processor. The processor is configured to determine, based on a frame rate of motion picture imaging, a correction distribution ratio between mechanical vibration-proof processing using the mechanical vibration-proof mechanism and electronic vibration-proof processing of correcting the rotational shake. The processor is then configured to execute the mechanical vibration-proof processing and the electronic vibration-proof processing.
1. An imaging apparatus comprising:
an imaging sensor;
a detection sensor that detects rotational shake, which is delivered to a body that accommodates the imaging sensor;
a mechanical vibration-proof mechanism that corrects the rotational shake by rotatably holding the imaging sensor and rotating the imaging sensor; and
a processor,
wherein the processor is configured to:
determine based on a frame rate of motion picture imaging, a correction distribution ratio between mechanical vibration-proof processing using the mechanical vibration-proof mechanism and electronic vibration-proof processing of correcting the rotational shake; and
execute the mechanical vibration-proof processing and the electronic vibration-proof processing.
2. The imaging apparatus according to claim 1 ,
wherein the rotational shake is a shake delivered to the body in a roll direction.
3. The imaging apparatus according to claim 1 ,
wherein higher the frame rate, smaller the processor sets the correction distribution ratio of the electronic vibration-proof processing.
4. The imaging apparatus according to claim 1 ,
wherein the processor is configured to determine the correction distribution ratio between the mechanical vibration-proof processing and the electronic vibration-proof processing by referring to a look-up table in which a relationship between the frame rate and a coefficient α (0<α<1) corresponding to the correction distribution ratio of the electronic vibration-proof processing is recorded.
5. The imaging apparatus according to claim 4 ,
wherein the processor is configured to:
separate the rotational shake into a first frequency component and a second frequency component having a frequency higher than a frequency of the first frequency component;
assign correction of a first component, which is obtained by multiplying the first frequency component by the coefficient α to the electronic vibration-proof processing; and
assign a second component, which is obtained by adding a component obtained by multiplying the first frequency component by (1−α) to the second frequency component, to the mechanical vibration-proof processing.
6. The imaging apparatus according to claim 4 ,
wherein the coefficient α is different depending on a resolution of an image signal.
7. The imaging apparatus according to claim 4 ,
wherein a lens is mountable on the body, and
the coefficient α is different depending on presence or absence of an optical shake correction function of the lens mounted on the body or a zoom magnification.
8. The imaging apparatus according to claim 1 ,
wherein the processor is configured to:
change a recording region, which is selected from an inside of an imaging region of the imaging sensor between a plurality of frames, in the electronic vibration-proof processing; and
execute a control to change the recording region based on the frame rate.
9. The imaging apparatus according to claim 8 ,
wherein higher the frame rate, larger the processor sets the recording region.
10. The imaging apparatus according to claim 1 , wherein:
the detection sensor detects translational shake, which is delivered to the body, in the intersection direction intersecting a rotation axis in the roll direction in addition to the rotational shake;
the mechanical vibration-proof processing corrects the translational shake in addition to the rotational shake; and
the electronic vibration-proof processing corrects the translational shake in addition to the rotational shake.
11. The imaging apparatus according to claim 10 ,
wherein the processor is configured to:
generate by synthesizing a plurality of frames imaged, a motion picture having a lower frame rate than a frame rate of the imaged frames; and
correct the translational shake for the plurality of frames and correct the rotational shake for a synthetic frame in which the plurality of frames are synthesized, in the electronic vibration-proof processing.
12. The imaging apparatus according to claim 11 ,
wherein the detection sensor detects at least one angular shake around an axis intersecting the rotation axis in addition to the rotational shake and the translational shake, and
in a case where a shake obtained by adding the angular shake to the translational shake is set as a total shake, the processor assigns correction of a part or all of the total shake to the mechanical vibration-proof processing and assigns correction of a part or all of the total shake to the electronic vibration-proof processing.
13. The imaging apparatus according to claim 11 ,
wherein the correction distribution ratio of the translational shake is different from the correction distribution ratio of the rotational shake.
14. The imaging apparatus according to claim 1 ,
wherein the processor is configured to:
be able to change the frame rate on the basis of an instruction from a user during motion picture imaging; and
set the correction distribution ratio for the rotational shake of the electronic vibration-proof processing to 0 in a case where the frame rate is changed from a lower frame rate to a higher frame rate.
15. The imaging apparatus according to claim 1 ,
wherein the processor determines the correction distribution ratio in live view imaging before motion picture imaging on the basis of a frame rate of the motion picture imaging executed after the live view imaging.
16. An operation method of an imaging apparatus including
an imaging sensor,
a detection sensor that detects rotational shake, which is delivered to a body that accommodates the imaging sensor, and
a mechanical vibration-proof mechanism that corrects the rotational shake by rotatably holding the imaging sensor and rotating the imaging sensor,
the operation method of the imaging apparatus comprising:
by a processor:
determining based on a frame rate of motion picture imaging, a correction distribution ratio between mechanical vibration-proof processing using the mechanical vibration-proof mechanism based on a frame rate during motion picture imaging and electronic vibration-proof processing of correcting the rotational shake; and
executing the mechanical vibration-proof processing and the electronic vibration-proof processing.
17. A non-transitory computer-readable storage medium storing a program for operating an imaging apparatus including
an imaging sensor,
a detection sensor that detects rotational shake, which is delivered to a body that accommodates the imaging sensor, and
a mechanical vibration-proof mechanism that corrects the rotational shake by rotatably holding the imaging sensor and rotating the imaging sensor,
the program comprising instructions for a processor to:
determine based on a frame rate of motion picture imaging, a correction distribution ratio between mechanical vibration-proof processing using the mechanical vibration-proof mechanism based on a frame rate during motion picture imaging and electronic vibration-proof processing of correcting the rotational shake; and
execute the mechanical vibration-proof processing and the electronic vibration-proof processing.