JP7532076B2 - Imaging device, control method thereof, and program - Google Patents

Description

The present invention relates to an imaging device, a control method thereof, a program, and a recording medium.

It is known that CMOS sensors used in imaging devices have a readout lag between the top and bottom of the sensor. If such a CMOS sensor is used in a camera capable of pan-tilt driving, the image will be distorted diagonally when panned, and the image will stretch and shrink when tilted, resulting in rolling shutter distortion, so it is effective to perform rolling shutter distortion correction.

In recent years, cameras capable of pan-tilt driving have been equipped with a tracking function that allows them to automatically track a subject. With such a camera, if rolling shutter distortion correction is performed in accordance with the movement of the camera during tracking, the distortion of the subject being tracked will increase further. This is due to the rolling shutter distortion correction being performed in accordance with the movement of the camera during tracking. In other words, by performing pan-tilt driving to match the speed of the subject being tracked, the subject will appear to be stationary at a specified position within the screen. This is because if the subject is relatively stationary, no rolling shutter distortion will occur, and rolling shutter distortion correction will be performed even though it is not necessary.

Patent document 1 discloses an imaging device that determines the amount of correction for distortion caused by the rolling shutter method based on the amount of motion detected by a motion detection means and the degree of focus detected by a focus detection means, and corrects the distortion by changing the readout position of each line of the image.

JP 2013-38482 A

However, in Patent Document 1, if it is determined that tracking is occurring based on the degree of focus, rolling shutter distortion correction is not performed, but if tracking is not actually occurring, there is a risk that the subject will be distorted.
The present invention has been made in consideration of the above-mentioned problems, and has an object to reduce distortion of a subject that occurs when rolling shutter distortion correction is performed when tracking and photographing the subject.

The present invention is an imaging device that captures images using a rolling shutter method, comprising a first acquisition means for acquiring information about a subject to be tracked and captured, a second acquisition means for acquiring information about at least one of pan drive and tilt drive of the imaging device, a change means for changing a correction intensity of rolling shutter distortion correction based on the subject information acquired by the first acquisition means and the drive information acquired by the second acquisition means, and a correction means for performing rolling shutter distortion correction using the correction intensity changed by the change means , wherein the first acquisition means acquires information about the speed of the subject to be tracked and captured, the second acquisition means acquires information about the drive speed as the drive information, and the change means increases the correction intensity of the rolling shutter distortion correction when a speed difference between the subject speed acquired by the first acquisition means and the drive speed acquired by the second acquisition means is equal to or greater than a predetermined value, compared to when the speed difference is less than the predetermined value .

The present invention makes it possible to reduce distortion of a subject when performing rolling shutter distortion correction when tracking and photographing the subject.

FIG. 1 is a diagram illustrating a configuration of a camera. 4 is a flowchart showing the operation of the camera according to the first embodiment. FIG. 2 is a diagram illustrating an example of a subject to be tracked. FIG. 2 is a diagram illustrating an example of a subject to be tracked. 10 is a flowchart showing the operation of a camera according to a second embodiment. 10 is a flowchart showing the operation of a camera according to a third embodiment. 13 is a flowchart showing the operation of a camera according to a fourth embodiment. 13 is a flowchart showing the operation of a camera according to a fifth embodiment. 13 is a flowchart showing the operation of a camera according to a sixth embodiment. 13 is a flowchart showing the operation of a camera according to a seventh embodiment.

A preferred embodiment of the present invention will be described below with reference to the drawings. In this embodiment, a camera capable of panning and tilting will be described as an imaging device.

First Embodiment
FIG. 1 is a diagram showing an example of the configuration of a camera 100.
The camera 100 includes a lens group 101, an optical filter 102, an image sensor 103, an AGC 104, an A/D conversion unit 105, a video signal processing unit 106, an exposure control unit 107, an optical control unit 108, a motion information acquisition unit 109, an RS distortion correction amount calculation unit 110, and a video signal output unit 111. The camera 100 also includes a pan-tilt motor 112, a pan-tilt drive unit 113, a pulse modulation unit 114, and the like.

The lens group 101 is an optical system that focuses light from a subject onto the image sensor 103. The lens group 101 includes a focus lens that focuses on the subject, a zoom lens that adjusts the angle of view, and the like. Light that enters the camera 100 through the lens group 101 passes through an optical filter 102 and is received by the image sensor 103. The optical filter 102 may be, for example, an infrared cut filter (IRCF). Image information passes through color filters arranged in a predetermined order for each pixel on the light receiving surface of the image sensor 103, and is imaged by the image sensor 103. The image sensor 103 outputs image information of the subject as an analog signal. The image sensor 103 is a CMOS sensor that captures images using a rolling shutter method. The image output by the image sensor 103 is gain-controlled by the AGC 104, and the brightness of the image signal is adjusted. The brightness-adjusted image signal is converted from an analog image signal to a digital image signal by the A/D converter 105.

The video signal processing unit 106 performs a predetermined process on the digital imaging signal converted by the A/D conversion unit 105, and outputs a luminance signal and a color signal for each pixel. The video signal processing unit 106 generates an image to be output, and also generates various parameters for controlling the camera. The various parameters for controlling the camera are used, for example, for aperture control, focus control, and white balance control to adjust the color tone.

The exposure control unit 107 calculates luminance information within the shooting screen from the luminance information output from the video signal processing unit 106, and controls the aperture and AGC 104 to adjust the shot image to a desired brightness.
For focusing, high frequency components are extracted from the video signal generated by the video signal processing unit 106, and the value of the high frequency components is used as focus information (focus evaluation value), and the optical control unit 108 controls the lens group 101 so that the focus evaluation value is maximized. The optical control unit 108 also inserts and removes the optical filter 102.

The pulse modulation unit 114 converts the signal into a PWM waveform and outputs it to the pan/tilt driving unit 113. The pan/tilt driving unit 113 drives the pan/tilt motor 112. When the pan/tilt motor 112 is driven, the imaging optical system including the lens group 101 and the sensor moves in the pan/tilt direction.

The motion information acquisition unit 109 acquires information about the subject to be tracked based on the video signal output from the video signal processing unit 106. The subject information includes, for example, motion information such as the moving direction and moving speed of the subject to be tracked.
The rolling shutter distortion correction amount calculation unit 110 changes the correction strength of the rolling shutter distortion correction based on the pan-tilt drive information acquired from the pan-tilt drive unit 113 and the information of the subject to be tracked acquired by the movement information acquisition unit 109, and calculates the correction amount.
The video signal output unit 111 performs rolling shutter distortion correction by performing geometric transformation based on the correction amount calculated by the rolling shutter distortion correction amount calculation unit 110. The video signal output unit 111 outputs the corrected video signal.

First Embodiment
In the first embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on information about a subject to be tracked and information about pan/tilt driving.
Fig. 2 is a flowchart showing the operation of the camera 100 of the first embodiment. The flowchart in Fig. 2 starts when the power of the camera 100 is turned on.

In S201, the motion information acquisition unit 109 detects a subject to be tracked (tracking target). Specifically, the motion information acquisition unit 109 recognizes a moving object such as a person or a car in an image by object recognition, and detects the recognized moving object as a subject to be tracked. Note that the motion information acquisition unit 109 may detect a subject in an image manually selected by a user as a subject to be tracked.

In S202, the motion information acquisition unit 109 acquires information about the detected subject to be tracked. Specifically, the motion information acquisition unit 109 calculates the amount of motion vector of the subject to be tracked within the screen by comparing the background difference between the current frame and the previous frame. In addition, the motion information acquisition unit 109 calculates the moving direction of the subject to be tracked and the speed of the subject from the calculated amount of motion vector.

FIG. 3A is a diagram showing an example of a previous frame 301. As shown in FIG.
In the previous frame 301, the pan is driven from right to left, and the speed of the pan drive matches the speed of the tracking target subject 302 moving from right to left, so the subject 302 is located at the center of the image. Since the pan drive speed and the speed of the tracking target subject 302 move at the same speed, the tracking target subject 302 appears to be stationary. In this case, if rolling shutter distortion correction is not performed, the tracking target subject 302 is captured without being distorted diagonally.

FIG. 3B is a diagram showing an example of the current frame 303.
In the current frame 303, the pan is driven from right to left, and the tracking target subject 304 moves at a speed different from the speed in the previous frame 301, that is, at a slow speed in this case, which causes a difference between the pan drive speed and the speed of the tracking target subject. Therefore, the tracking target subject 304 is located at the edge of the image rather than at the center. In this state, if rolling shutter distortion correction is not performed as in the previous frame 301, the tracking target subject 304 will be photographed distorted. The reason for this distorted photograph is that a difference occurs between the pan drive speed and the speed of the tracking target subject 304, causing the tracking target subject 304 to stop and become invisible.

Here, the movement direction of the subject to be tracked relative to the pan drive, calculated in S202, is to the right in the cases of Figures 3(a) and 3(b), and the speed of the subject can be calculated using the calculated vector amount and the frame rate, etc. If a leftward direction is a positive speed and a rightward direction is a negative speed, then in the cases of Figures 3(a) and 3(b), the subject to be tracked is moving relatively to the right, so the speed of the subject is negative.

In S203, the RS distortion correction amount calculation unit 110 acquires pan tilt drive information from the pan tilt drive unit 113. Specifically, the RS distortion correction amount calculation unit 110 acquires information on the drive direction of the pan drive from the pan tilt drive unit 113. The RS distortion correction amount calculation unit 110 acquires rightward information when the pan tilt drive unit 113 is driving the pan to the right, and acquires leftward information when the pan tilt drive unit 113 is driving the pan to the left. In the cases of Figures 3(a) and 3(b), the movement is from right to left, and leftward information is acquired. Note that the leftward direction is positive and the rightward direction is negative, so the drive speed in this case is positive.

In S204, the RS distortion correction amount calculation unit 110 compares the movement direction of the subject to be tracked obtained in S202 with the drive direction of the pan drive obtained in S203. If the movement direction of the subject to be tracked and the drive direction of the pan drive are the same, the correction strength of the rolling shutter distortion correction is not changed and the process ends. On the other hand, if the movement direction of the subject to be tracked and the drive direction of the pan drive are different, the process proceeds to S205.

In S205, the RS distortion correction amount calculation unit 110 determines whether the value obtained by subtracting the speed of the subject to be tracked from the speed of the pan drive is equal to or greater than a predetermined value. The RS distortion correction amount calculation unit 110 can acquire the pan drive speed from the pan tilt drive unit 113. The RS distortion correction amount calculation unit 110 may calculate the pan drive speed using the value of the gyro sensor. If the value obtained by subtracting the speed of the subject to be tracked from the pan drive speed is not equal to or greater than a predetermined value, the correction strength of the rolling shutter distortion correction is not changed and the process ends. On the other hand, if the value obtained by subtracting the speed of the subject to be tracked from the pan drive speed is equal to or greater than a predetermined value, the difference between the speed of the subject to be tracked and the speed of the pan drive will cause the subject to appear distorted and not to look stationary, so the process proceeds to S206 to prevent distortion.

In S206, the RS distortion correction amount calculation unit 110 increases the correction strength of the rolling shutter distortion correction to calculate the correction amount. That is, the RS distortion correction amount calculation unit 110 increases the correction strength of the rolling shutter distortion correction more than when the value obtained by subtracting the speed of the subject to be tracked from the speed of the pan drive is less than a predetermined value. The video signal output unit 111 performs a geometric transformation based on the correction amount calculated by the rolling shutter distortion correction amount calculation unit 110 to perform the rolling shutter distortion correction.
Fig. 4 is a diagram showing an example of a frame 401 displayed after performing rolling shutter distortion correction. As shown in Fig. 4, by increasing the correction strength of the rolling shutter distortion correction, a difference occurs between the speed of the subject to be tracked and the speed of the pan drive, so that even if the subject 402 is located at the edge, it is possible to capture the subject 402 without distortion.

According to this embodiment, the correction strength of the rolling shutter distortion correction is changed based on the pan drive information and the information of the subject being tracked and photographed, thereby making it possible to reduce the distortion of the subject when rolling shutter distortion correction is performed.

In this embodiment, the correction strength of the rolling shutter distortion correction is increased because the speed difference is greater when the moving direction of the subject to be tracked is different from the driving direction of the pan drive. However, even if the moving direction of the subject to be tracked is the same as the driving direction of the pan drive, the correction strength of the rolling shutter distortion correction may be increased if a speed difference occurs. In other words, if the speed difference between the speed of the pan drive and the speed of the subject is equal to or greater than a predetermined value, the correction strength of the rolling shutter distortion correction may be increased.

In addition, in this embodiment, the case where a target subject is tracked has been described, but when panning is performed without tracking a subject, the RS distortion correction amount calculation unit 110 may increase the correction strength of the rolling shutter distortion correction compared to when panning is performed while tracking a subject.
Furthermore, in this embodiment, the case of pan driving has been described, but the present invention is not limited to this case, and can be similarly applied to at least one of pan driving and tilt driving (pan-tilt driving).

Second Embodiment
In the second embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on information about the position of a subject to be tracked.
Fig. 5 is a flowchart showing the operation of the camera 100 according to the second embodiment. The flowchart in Fig. 5 starts when the power of the camera 100 is turned on.

In S501, the RS distortion correction amount calculation unit 110 acquires pan/tilt drive information from the pan/tilt drive unit 113. Specifically, the RS distortion correction amount calculation unit 110 acquires information on the state of the pan/tilt drive unit 113 and determines whether or not pan/tilt drive is in operation. If the pan/tilt drive unit 113 is not in operation, the process ends without changing the correction strength of the rolling shutter distortion correction. On the other hand, if the pan/tilt drive unit 113 is in operation, the process proceeds to S502.

In S502, the movement information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the movement information acquisition unit 109 checks the position of the subject to be tracked in the image.
In S503, the motion information acquisition unit 109 judges whether the position of the subject is the same in the image. For example, when the center of gravity position of a moving object detected or recognized as a moving object is located within a predetermined number of pixels by comparing the previous frame and the current frame, the motion information acquisition unit 109 judges that the position of the subject is the same in the image. If the position of the subject is the same in the image, it is considered that the tracking target subject is being tracked, and the subject appears to be stationary. If the position of the subject is a different position in the image, the correction strength of the rolling shutter distortion correction is not changed and the process ends. On the other hand, if the position of the subject is the same in the image, the process proceeds to S504.

In S504, the RS distortion correction amount calculation unit 110 calculates the correction amount by reducing the correction strength of the rolling shutter distortion correction. In other words, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction more than when the subject is positioned at a different position within the image.

According to this embodiment, when the position of the subject is the same within an image, the correction strength of the rolling shutter distortion correction is reduced, thereby making it possible to prevent distortion of the subject due to the rolling shutter distortion correction.
In this embodiment, the case where a target subject is tracked has been described, but the present invention can also be applied to a case where the subject is not tracked but is panned and the position of the subject remains the same within the image.
In addition, in this embodiment, the case has been described where the process proceeds from S503 to NO to end the process without changing the correction intensity of the rolling shutter distortion correction. However, the process may be combined with other embodiments as appropriate, for example by proceeding from S503 to NO to execute the flowchart of FIG. 2.

Third Embodiment
In the following embodiments, the correction strength of the rolling shutter distortion correction is changed based on information about the subject to be tracked. In a third embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on the type of subject to be tracked.

In S601, the movement information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the movement information acquisition unit 109 acquires information on the type of the subject to be tracked.
In S602, the motion information acquisition unit 109 determines whether the type of the subject is a person. If the type of the subject is other than a person (for example, a vehicle such as a car), the correction strength of the rolling shutter distortion correction is not changed and the process ends. On the other hand, if the type of the subject is a person, the process proceeds to 603.

In S603, the RS distortion correction amount calculation unit 110 calculates the correction amount by reducing the correction strength of the rolling shutter distortion correction. In other words, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction more than when the type of subject is other than a person.

According to this embodiment, when the subject is a person, the correction strength of the rolling shutter distortion correction is reduced, thereby reducing the distortion of the subject caused by the rolling shutter distortion correction and making the person's face easier to recognize.
The flowchart in FIG. 6 may be added between S201 and S202 in the flowchart in FIG. 2 described above, and may be appropriately combined with other embodiments by, for example, proceeding to S202 when branching to NO from S602.

Fourth Embodiment
In the fourth embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on the size of the subject to be tracked.

In S701, the motion information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the motion information acquisition unit 109 acquires information on the size of the subject to be tracked.
In S702, the motion information acquisition unit 109 determines whether the size of the subject is equal to or larger than a predetermined size. If the size of the subject is less than the predetermined size, the process ends without changing the correction strength of the rolling shutter distortion correction. On the other hand, if the size of the subject is equal to or larger than the predetermined size, the process proceeds to S703.

In S703, the RS distortion correction amount calculation unit 110 calculates the correction amount by reducing the correction strength of the rolling shutter distortion correction. That is, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction compared to when the size of the subject is less than a predetermined value.
The flowchart in FIG. 7 may be added between S201 and S202 in the flowchart in FIG. 2 described above, and may be combined with other embodiments as appropriate by, for example, proceeding to S202 when branching to NO from S702.

Fifth embodiment
In the fifth embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on the position of a subject to be tracked.

In S801, the movement information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the movement information acquisition unit 109 acquires information on the position of the subject to be tracked.
In S802, the motion information acquisition unit 109 determines whether the subject has moved outside the screen. If the subject is not outside the screen but is present within the screen, the correction strength is changed to an appropriate strength. On the other hand, if the subject is not present outside the screen, the process proceeds to S803.

In S803, if the rolling shutter distortion correction is enabled with a strength equal to or greater than a predetermined strength, the RS distortion correction amount calculation unit 110 ends the process without changing the correction strength of the rolling shutter distortion correction. Therefore, by performing the rolling shutter distortion correction, it is possible to suppress distortion of a subject such as a background.
The flowchart in FIG. 8 may be added between S201 and S202 in the flowchart in FIG. 2 described above, and may be appropriately combined with other embodiments by, for example, proceeding to S202 when branching to NO from S802.

Sixth embodiment
In the sixth embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on a subject other than the subject to be tracked.

In S901, the motion information acquisition unit 109 acquires information on a subject. Specifically, the motion information acquisition unit 109 detects a subject other than the subject to be tracked.
In S902, the motion information acquisition unit 109 determines whether or not a subject other than the subject to be tracked exists within the screen. If a subject other than the subject to be tracked does not exist, the correction strength is changed to an appropriate strength. On the other hand, if a subject other than the subject to be tracked exists, the process proceeds to S903.

In S903, if the rolling shutter distortion correction is enabled with a strength equal to or greater than a predetermined strength, the RS distortion correction amount calculation unit 110 ends the process without changing the correction strength of the rolling shutter distortion correction.
The flowchart in FIG. 9 may be added between S201 and S202 in the flowchart in FIG. 2 described above, and may be appropriately combined with other embodiments by, for example, proceeding to S202 when branching to NO from S902.

Seventh embodiment
In the seventh embodiment, a case will be described in which the correction strength of the rolling shutter distortion correction is changed based on the movement of a subject to be tracked.

In S1001, the movement information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the movement information acquisition unit 109 acquires information on the movement of the subject to be tracked.
In S1002, the motion information acquisition unit 109 determines whether the motion of the subject is walking. If the motion of the subject is not walking, the correction strength of the rolling shutter distortion correction is not changed and the process ends. On the other hand, if the motion of the subject is walking, the process proceeds to S1003.

In S1003, the RS distortion correction amount calculation unit 110 calculates the correction amount by reducing the correction strength of the rolling shutter distortion correction. That is, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction compared to when the subject's movement is other than walking.
The flowchart in FIG. 10 may be added between S201 and S202 in the flowchart in FIG. 2 described above, and may be appropriately combined with other embodiments by, for example, proceeding to S202 when branching to NO from S1002.

<Other embodiments>
The present invention can also be realized by executing the following process. That is, a program for realizing the functions of the above-described embodiment is supplied to a system or device via a network or various recording media, and a computer (CPU, MPU, etc.) of the system or device reads and executes the program code. In this case, the program and the recording media on which the program is stored constitute the present invention.

Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the specific embodiment, and modifications and the like are possible within the scope of the present invention, and the above-mentioned embodiments may be combined as appropriate.

100: Camera 103: Image sensor 109: Motion information acquisition unit 110: RS distortion correction amount calculation unit 111: Video signal output unit

Claims (11)

An imaging device that captures images using a rolling shutter system,
A first acquisition means for acquiring information of a subject to be tracked and photographed;
a second acquisition means for acquiring information on at least one of pan driving and tilt driving of the imaging device;
a change unit that changes a correction intensity of the rolling shutter distortion correction based on the information of the object acquired by the first acquisition unit and the information of the drive acquired by the second acquisition unit;
a correction unit that performs rolling shutter distortion correction using the correction strength changed by the change unit ,
the first acquisition means acquires information on the speed of a subject to be tracked and photographed;
the second acquisition means acquires information on a speed of the drive as the drive information,
The change means is
An imaging device characterized in that, when a speed difference between the subject speed acquired by the first acquisition means and the drive speed acquired by the second acquisition means is equal to or greater than a predetermined value, the correction strength of rolling shutter distortion correction is increased compared to when the speed difference is less than the predetermined value . the first acquisition means acquires information on a moving direction of a subject to be tracked and photographed;
the second acquisition means acquires information on a driving direction based on the information on the driving;
The change means is
2. The imaging device according to claim 1, wherein a correction strength of rolling shutter distortion correction is changed based on the moving direction of the subject acquired by the first acquisition means and the driving direction acquired by the second acquisition means. The change means is
3. The imaging apparatus according to claim 1, wherein when the imaging apparatus is driven without tracking the subject, the correction strength of the rolling shutter distortion correction is increased compared to when the imaging apparatus is driven with tracking the subject. the first acquisition means acquires information on a position of a subject to be tracked and photographed;
the second acquisition means acquires information on a state of at least one of pan driving and tilt driving,
The change means is
The imaging device according to any one of claims 1 to 3, characterized in that when the driving state of at least one of the pan drive and tilt drive of the imaging device acquired by the second acquisition means is in operation and the position of the subject acquired by the first acquisition means is the same position in the image, the correction strength of the rolling shutter distortion correction is reduced compared to when the position is different. the first acquisition means acquires information on the size of a subject to be tracked and photographed;
The change means is
5. The imaging apparatus according to claim 1 , wherein a correction strength of the rolling shutter distortion correction is changed based on the size of the subject acquired by the first acquisition means. The change means is
6. The imaging device according to claim 5, wherein when the size of the subject acquired by the first acquisition means is equal to or larger than a predetermined size, the correction strength of the rolling shutter distortion correction is lowered compared to when the size is less than the predetermined size. the first acquisition means acquires information on a position of a subject to be tracked and photographed;
The change means is
7. The imaging device according to claim 1 , wherein when the position of the subject acquired by the first acquisition means is outside the screen, the correction strength of the rolling shutter distortion correction is not changed. the first acquisition means acquires information of a subject other than a subject to be tracked and photographed;
The change means is
The imaging device according to any one of claims 1 to 7, characterized in that when there is a subject other than the subject to be tracked and photographed, which is acquired by the first acquisition means, the correction strength of the rolling shutter distortion correction is not changed. A method for controlling an imaging device that captures images using a rolling shutter system, comprising:
A first acquisition step of acquiring information of a subject to be tracked and photographed;
a second acquisition step of acquiring information on at least one of pan driving and tilt driving of the imaging device;
a changing step of changing a correction intensity of the rolling shutter distortion correction based on the information of the object acquired in the first acquiring step and the information of the drive acquired in the second acquiring step;
a correction step of performing rolling shutter distortion correction using the correction strength changed by the change step ,
In the first acquisition step, information on the speed of a subject to be tracked and photographed is acquired;
In the second acquisition step, information on a driving speed is acquired as the driving information,
In the changing step,
A method for controlling an imaging device, characterized in that when a speed difference between the subject speed acquired by the first acquisition step and the drive speed acquired by the second acquisition step is a predetermined value or more, the correction strength of rolling shutter distortion correction is increased compared to when the speed difference is less than the predetermined value . A program for causing a computer to function as each of the means of the imaging apparatus according to any one of claims 1 to 8 . 9. A computer-readable recording medium storing a program for causing a computer to function as each of the means of the imaging apparatus according to claim 1.

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