Imaging apparatus, imaging method, and imaging program
An imaging apparatus includes an imaging element, a moving mechanism that corrects a shake, a curtain that blocks an incidence ray on the imaging element by traveling in a column direction, and a processor configured to, in a state where the moving mechanism moves the imaging element, in a case where an instruction to start imaging with an exposure time period less than or equal to a predetermined time period is received, perform a moving amount reduction control for reducing a moving amount for moving the imaging element from an elapse of a timing of reception of the instruction until a start of exposure of the imaging element, compared to a moving amount of the imaging element at the timing of reception of the instruction, in a state where the moving amount reduction control is performed, start a reset control for sequentially resetting a plurality of pixels included in the imaging element along the column direction for each line in a row direction, and after an elapse of a time period corresponding to the exposure time period from the start of the reset control, cause the curtain to travel in the column direction.
1. An imaging apparatus comprising:
an imaging element in which a plurality of pixels are arranged in a row direction and a column direction;
a moving mechanism that corrects a shake by moving the imaging element;
a curtain that blocks an incidence ray on the imaging element by traveling in the column direction; and
a processor configured to,
in a state where the moving mechanism moves the imaging element, in a case where an instruction to start imaging with an exposure time period less than or equal to a predetermined time period is received, perform a moving amount reduction control for reducing a moving amount for moving the imaging element from an elapse of a timing of reception of the instruction until a start of exposure of the imaging element, compared to a moving amount of the imaging element at the timing of reception of the instruction,
in a state where the moving amount reduction control is performed, start a reset control for sequentially resetting the plurality of pixels included in the imaging element along the column direction for each line in the row direction, and
after an elapse of a time period corresponding to the exposure time period from the start of the reset control, cause the curtain to travel in the column direction,
wherein the moving amount reduction control is a stop control for stopping the imaging element within a target range including a target position using a moving target position of the imaging element at a predetermined first timing as the target position,
the processor is configured to derive a timing of the resetting along the column direction based on the target position of the imaging element and reduce an uneven exposure value in an image obtained by imaging by the imaging element due to performing the resetting along the column direction at the derived timing,
the processor is configured to start the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value, and
the processor is configured to, after the timing of reception of the instruction, perform a control for correcting the shake in the row direction by moving the imaging element, on the moving mechanism in only the row direction at an initial position of the imaging element.
2. The imaging apparatus according to claim 1 ,
wherein the processor is configured to derive the timing of the resetting in accordance with traveling speed characteristics of the curtain.
3. The imaging apparatus according to claim 1 ,
wherein the stop control is a control for stopping the imaging element within the target range while imaging for still images of a plurality of frames is performed in accordance with the instruction issued once.
4. The imaging apparatus according to claim 1 ,
wherein the processor is configured to, in a case of performing the stop control on the imaging element, perform processing of smoothing information indicating the target position of the imaging element in the stop control.
5. The imaging apparatus according to claim 4 ,
wherein the processor is configured to, in a case of performing the stop control on the imaging element, perform a control for fixing an output value obtained by smoothing the information indicating the target position of the imaging element in the stop control, at a timing of a start of the stop control.
6. The imaging apparatus according to claim 1 ,
wherein the processor is configured to start the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value.
7. The imaging apparatus according to claim 1 ,
wherein the processor is configured to perform a control for restoring a roll rotation amount of the imaging element to an initial position, on the moving mechanism at a predetermined second timing.
8. The imaging apparatus according to claim 1 ,
wherein the processor is configured to further perform shading correction in the column direction on an image obtained by imaging.
9. The imaging apparatus according to claim 2 ,
wherein the stop control is a control for stopping the imaging element within the target range while imaging for still images of a plurality of frames is performed in accordance with the instruction issued once.
10. The imaging apparatus according to claim 2 ,
wherein the processor is configured to, in a case of performing the stop control on the imaging element, perform processing of smoothing information indicating the target position of the imaging element in the stop control.
11. The imaging apparatus according to claim 3 ,
wherein the processor is configured to, in a case of performing the stop control on the imaging element, perform processing of smoothing information indicating the target position of the imaging element in the stop control.
12. The imaging apparatus according to claim 2 ,
wherein the processor is configured to start the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value.
13. The imaging apparatus according to claim 3 ,
wherein the processor is configured to start the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value.
14. The imaging apparatus according to claim 4 ,
wherein the processor is configured to start the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value.
15. The imaging apparatus according to claim 5 ,
wherein the processor is configured to start the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value.
16. The imaging apparatus according to claim 2 ,
wherein the processor is configured to perform a control for restoring a roll rotation amount of the imaging element to an initial position, on the moving mechanism at a predetermined second timing.
17. An imaging method comprising:
a step of, in a case where an instruction to start imaging with an exposure time period less than or equal to a predetermined time period is received during shake correction of correcting a shake by moving an imaging element in which a plurality of pixels are arranged in a row direction and a column direction, reducing a moving amount for moving the imaging element from an elapse of a timing of reception of the instruction until a start of exposure of the imaging element, compared to a moving amount of the imaging element at the timing of reception of the instruction;
a step of, in a state where the step of reducing the moving amount is performed, starting a reset control for sequentially resetting the plurality of pixels included in the imaging element along the column direction for each line in the row direction;
a step of causing a curtain blocking an incidence ray on the imaging element to travel after an elapse of a time period corresponding to the exposure time period from the start of the reset control;
a step of stopping the imaging element within a target range including a target position using a moving target position of the imaging element at a predetermined first timing as the target position;
a step of deriving a timing of the resetting along the column direction based on the target position of the imaging element; and
a step of reducing an uneven exposure value in an image obtained by imaging by the imaging element due to performing the resetting along the column direction at the derived timing,
wherein the method further comprises:
a step of starting the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value, and
after the timing of reception of the instruction, a step of performing a control for correcting the shake in the row direction by moving the imaging element, in only the row direction at an initial position of the imaging element.
18. A non-transitory computer-readable storage medium storing an imaging program for causing a computer to execute:
a procedure of, in a case where an instruction to start imaging with an exposure time period less than or equal to a predetermined time period is received during shake correction of correcting a shake by moving an imaging element in which a plurality of pixels are arranged in a row direction and a column direction, reducing a moving amount for moving the imaging element from an elapse of a timing of reception of the instruction until a start of exposure of the imaging element, compared to a moving amount of the imaging element at the timing of reception of the instruction;
a procedure of, in a state where the procedure of reducing the moving amount is performed, starting a reset control for sequentially resetting the plurality of pixels included in the imaging element along the column direction for each line in the row direction;
a procedure of causing a curtain blocking an incidence ray on the imaging element to travel after an elapse of a time period corresponding to the exposure time period from the start of the reset control;
a procedure of stopping the imaging element within a target range including a target position using a moving target position of the imaging element at a predetermined first timing as the target position;
a procedure of deriving a timing of the resetting along the column direction based on the target position of the imaging element; and
a procedure of reducing an uneven exposure value in an image obtained by imaging by the imaging element due to performing the resetting along the column direction at the derived timing,
wherein the imaging program further causes the computer to execute:
a procedure of starting the reset control in a case where the moving amount of the imaging element is decreased to or below a predetermined value, and
after the timing of reception of the instruction, a procedure of performing a control for correcting the shake in the row direction by moving the imaging element, in only the row direction at an initial position of the imaging element.