JP2021175046A - Imaging apparatus, method for controlling the same, and program - Google Patents

Abstract

To reduce, when tracking and photographing a subject, distortion of a subject when performing rolling shutter distortion correction.SOLUTION: The present invention is an imaging apparatus that picks up an image in a rolling shutter system, and has: first acquisition means that acquires information on a subject that is tracked and photographed; second acquisition means that acquires information on at least one drive of pan drive and tilt drive of the imaging apparatus; changing means that changes the correction strength of rolling shutter distortion correction based on the information on the subject acquired by the first acquisition means and the information on the pan or tilt drive acquired by the second acquisition means; and correction means that performs the rolling shutter distortion correction with the correction strength changed by the changing means.SELECTED DRAWING: Figure 2

Description

The present invention relates to an image pickup apparatus, a control method thereof, a program, and a recording medium.

It is known that the CMOS sensor used in the image pickup apparatus has a read-out lag between the upper part and the lower part of the sensor. When such a CMOS sensor is used in a camera capable of pan-tilt drive, the image is distorted diagonally when pan-driven, and the image expands and contracts when tilt-driven, resulting in rolling shutter distortion. It is effective to correct the rolling shutter distortion.

In recent years, cameras capable of pan-tilt drive have a tracking function that can automatically track a subject. If the rolling shutter distortion is corrected according to the movement of the camera during tracking with such a camera, the distortion of the subject to be tracked will further increase. This is due to the fact that the rolling shutter distortion correction was performed according to the movement of the camera during tracking. That is, by driving the pan / tilt so as to match the speed of the subject to be tracked, the subject appears to be stationary at a predetermined position on the screen. This is because rolling shutter distortion does not occur in a relatively stationary subject, and correction is performed even though it is not necessary to perform rolling shutter distortion correction.

In Patent Document 1, the amount of correction of distortion caused by the rolling shutter method is determined from the amount of motion detected by the motion detecting means and the degree of focusing detected by the focusing detecting means, and each line of the image is read out. An imaging device that corrects distortion by changing the position is disclosed.

Japanese Unexamined Patent Publication No. 2013-38482

However, in Patent Document 1, although the rolling shutter distortion correction is not performed when it is determined that the subject is following according to the degree of focusing, the subject may be distorted if the subject is not actually followed. be.
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to reduce the distortion of the subject when the rolling shutter distortion is corrected when the subject is tracked and photographed.

The present invention is an imaging device that captures an image by a rolling shutter method, and is at least one of a first acquisition means for acquiring information on a subject to be tracked and captured, and a pan drive and a tilt drive of the imaging device. The rolling shutter is based on the second acquisition means for acquiring the information of the one drive, the information of the subject acquired by the first acquisition means, and the drive information acquired by the second acquisition means. It is characterized by having a changing means for changing the correction strength of distortion correction and a correction means for performing rolling shutter distortion correction by the correction strength changed by the changing means.

According to the present invention, it is possible to reduce the distortion of the subject when the rolling shutter distortion is corrected when the subject is tracked and photographed.

It is a figure which shows the structure of a camera. It is a flowchart which shows the operation of the camera of 1st Embodiment. It is a figure which shows an example of the subject to be tracked. It is a figure which shows an example of the subject to be tracked. It is a flowchart which shows the operation of the camera of 2nd Embodiment. It is a flowchart which shows the operation of the camera of 3rd Embodiment. It is a flowchart which shows the operation of the camera of 4th Embodiment. It is a flowchart which shows the operation of the camera of 5th Embodiment. It is a flowchart which shows the operation of the camera of 6th Embodiment. It is a flowchart which shows the operation of the camera of 7th Embodiment.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the present embodiment, a camera capable of pan drive and tilt drive as an image pickup device will be described.

<First Embodiment>
FIG. 1 is a diagram showing an example of the configuration of the 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, and RS distortion correction. It has a quantity calculation unit 110 and a video signal output unit 111. Further, the camera 100 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 collects light from the subject on the image sensor 103. The lens group 101 includes a focus lens for focusing on a subject, a zoom lens for adjusting an angle of view, and the like. The light incident on the camera 100 through the lens group 101 passes through the optical filter 102 and is received by the image sensor 103. As the optical filter 102, for example, an infrared cut filter (IRCF) or the like is used. The video 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 video information to be photographed as an analog signal. The image sensor 103 is a CMOS sensor that photographs by a rolling shutter method. The image output by the image sensor 103 is gain-controlled by the AGC 104 to adjust the brightness of the image signal. The video signal whose brightness has been adjusted is converted from an analog image pickup signal to a digital image pickup signal by the A / D conversion unit 105.

The video signal processing unit 106 performs predetermined processing 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 a video for output and also generates parameters for controlling the camera. As each parameter for camera control, for example, it is used for aperture control, focusing control, white balance control for adjusting color, and the like.

The exposure control unit 107 calculates the brightness information in the shooting screen from the brightness information output from the video signal processing unit 106, and controls the aperture and the AGC 104 in order to adjust the shot image to a desired brightness.
Further, in focusing, a high-frequency component is extracted from the video signal generated by the video signal processing unit 106, and the value of the high-frequency component is used as focus focus information (focus evaluation value), and the optical control unit maximizes the focus evaluation value. The lens group 101 is controlled by 108. The optical control unit 108 also performs an insertion / removal operation of the optical filter 102.

The pulse modulation unit 114 converts it into a PWM waveform and outputs it to the pan / tilt drive unit 113. The pan-tilt drive unit 113 drives the pan-tilt motor 112. By driving the pan-tilt motor 112, 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 on 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 determines 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 motion information acquisition unit 109. Change and calculate the correction amount.
The video signal output unit 111 corrects the rolling shutter distortion 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 where the correction intensity of the rolling shutter distortion correction is changed based on the information of the subject to be tracked and the information of the pan / tilt drive will be described.
FIG. 2 is a flowchart showing the operation of the camera 100 of the first embodiment. The flowchart of FIG. 2 starts when the power of the camera 100 is turned on.

In S201, the motion information acquisition unit 109 detects the 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 the image by object recognition, and detects the recognized moving object as a subject to be tracked. The motion information acquisition unit 109 may detect a subject in the image manually selected by the user as a subject to be tracked.

In S202, the motion information acquisition unit 109 acquires the information of the detected subject to be tracked. Specifically, the motion information acquisition unit 109 calculates the amount of motion vector in the screen of the subject to be tracked by comparing the background difference between the current frame and the previous frame. Further, 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 motion vector amount.

FIG. 3A is a diagram showing an example of the front frame 301.
In the front frame 301, the pan is driven from right to left, and the speed of the pan drive and the speed of the subject 302 to be tracked moving from right to left match, so that the subject 302 is located in the center of the image. It is in a state of being. Since the pan-driven speed and the speed of the subject 302 to be tracked are moving at the same speed, the subject 302 to be tracked appears to be stationary. In this case, if the rolling shutter distortion correction is not performed, the subject 302 to be tracked is photographed without being obliquely distorted.

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 subject 304 to be tracked moves at a speed different from the speed up to the previous frame 301, that is, at a low speed in this case. There is a difference in the speed of the subject. Therefore, the subject 304 to be tracked is not located at the center of the image but at the edge. In this state, if the rolling shutter distortion correction is not performed as in the case of the front frame 301, the subject 304 to be tracked will be distorted and photographed. The reason why the image is distorted in this way is that the speed of the pan drive and the speed of the subject 304 to be tracked are different from each other, so that the subject 304 to be tracked is stationary and cannot be seen.

Here, the moving direction of the subject to be tracked relative to the pan drive calculated in S202 is the right in the case of FIGS. 3A and 3B, and the speed of the subject is calculated. It can be calculated using the vector quantity and the frame rate. Assuming that the leftward direction is a positive speed and the rightward direction is a negative speed, in the cases of FIGS. 3 (a) and 3 (b), the subject to be tracked is relatively moving to the right, so the speed of the subject is It will be negative.

In S203, the RS distortion correction amount calculation unit 110 acquires the pan-tilt drive information from the pan-tilt drive unit 113. Specifically, the RS distortion correction amount calculation unit 110 acquires information on the pan drive drive direction 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 drives the pan to the right, and acquires leftward information when the pan / tilt drive unit 113 drives the pan to the left. In the case of FIGS. 3A and 3B, the information is moving from right to left, and information pointing to the left is acquired. Since the leftward direction is positive and the rightward direction is negative, the drive speed in this case is positive.

In S204, the RS distortion correction amount calculation unit 110 compares the moving direction of the subject to be tracked acquired in S202 with the pan-driven drive direction acquired in S203. When the moving direction of the subject to be tracked and the driving direction of the pan drive are the same, the process ends without changing the correction intensity of the rolling shutter distortion correction. On the other hand, if the moving direction of the subject to be tracked is different from the driving direction of the pan drive, the process proceeds to S205.

In S205, the RS distortion correction amount calculation unit 110 determines whether or not the value obtained by subtracting the speed of the subject to be tracked from the pan-driven speed is equal to or higher 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 more than a predetermined value, the process ends without changing the correction intensity of the rolling shutter distortion correction. On the other hand, when the value obtained by subtracting the speed of the subject to be tracked from the speed of the pan drive is equal to or higher than a predetermined value, the subject may be stationary due to the difference between the speed of the subject to be tracked and the speed of the pan drive. Since it becomes invisible and distorted, the process proceeds to S206 to prevent distortion.

In S206, the RS distortion correction amount calculation unit 110 increases the correction intensity 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 as compared with the case where the value obtained by subtracting the speed of the subject to be tracked from the pan drive speed is less than a predetermined value. The video signal output unit 111 corrects the rolling shutter distortion by performing geometric transformation based on the correction amount calculated by the rolling shutter distortion correction amount calculation unit 110.
FIG. 4 is a diagram showing an example of the frame 401 displayed after performing rolling shutter distortion correction. As shown in FIG. 4, by increasing the correction intensity of the rolling shutter distortion correction, there is a difference between the speed of the subject to be tracked and the speed of the pan drive, and the subject without distortion even if the subject 402 is located at the edge. 402 can be photographed.

According to the present embodiment, the distortion of the subject when the rolling shutter distortion correction is performed is reduced by changing the correction intensity of the rolling shutter distortion correction based on the pan drive information and the information of the subject to be tracked and photographed. Can be made to.

In the present embodiment, the speed difference is larger when the moving direction of the subject to be tracked and the driving direction of the pan drive are different, so that the correction strength of the rolling shutter distortion correction is increased. However, even when the moving direction of the subject to be tracked and the driving direction of the pan drive are the same, if there is a speed difference, the correction strength of the rolling shutter distortion correction may be increased. That is, when the speed difference between the pan drive speed and the speed of the subject is equal to or greater than a predetermined speed, the correction strength of the rolling shutter distortion correction may be increased.

Further, in the present embodiment, the case of tracking the target subject has been described, but when the subject is pan-driven without being tracked, the RS distortion correction amount calculation unit 110 tracks the subject and pan-drives the subject. The correction strength of the rolling shutter distortion correction may be increased as compared with the case where the rolling shutter distortion is corrected.
Further, in the present embodiment, the case of pan drive has been described, but the present invention is not limited to this case, and the same can be applied to at least one of pan drive and tilt drive (pan tilt drive).

<Second embodiment>
In the second embodiment, a case where the correction intensity of the rolling shutter distortion correction is changed based on the information on the position of the subject to be tracked will be described.
FIG. 5 is a flowchart showing the operation of the camera 100 of the second embodiment. The flowchart of FIG. 5 starts when the power of the camera 100 is turned on.

In S501, the RS distortion correction amount calculation unit 110 acquires the 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 the pan-tilt drive is being driven. When the pan-tilt drive unit 113 is not being driven, the process ends without changing the correction strength of the rolling shutter distortion correction. On the other hand, when the pan / tilt drive unit 113 is being driven, the process proceeds to S502.

In S502, the motion information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the motion information acquisition unit 109 confirms the position of the subject to be tracked in the image.
In S503, the motion information acquisition unit 109 determines whether or not the positions of the subjects are the same in the image. For example, when the motion information acquisition unit 109 positions the center of gravity of the moving object that detects the moving object or recognizes the object within a predetermined number of pixels by comparing the previous frame and the current frame, the position of the subject is the same in the image. Judge that there is. When the positions of the subjects are the same in the image, it is considered that the subject to be tracked is being tracked, and the subject appears to be stationary. If the position of the subject is different in the image, the process ends without changing the correction intensity of the rolling shutter distortion correction. On the other hand, if the positions of the subjects are the same in the image, the process proceeds to S504.

In S504, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction to calculate the correction amount. That is, the RS distortion correction amount calculation unit 110 lowers the correction intensity of the rolling shutter distortion correction as compared with the case where the positions of the subjects are different positions in the image.

According to the present embodiment, when the positions of the subjects are the same in the image, the distortion of the subject due to the rolling shutter distortion correction can be prevented by lowering the correction intensity of the rolling shutter distortion correction.
In the present embodiment, the case of tracking the target subject has been described, but it is also applied to the case where the position of the subject is the same in the image when the subject is pan-driven without tracking the subject. Can be done.
Further, in the present embodiment, the case where the rolling shutter distortion correction is terminated without changing the correction strength by proceeding from S503 to NO has been described, but the flowchart of FIG. 2 is executed by proceeding from S503 to NO. It may be combined with other embodiments as appropriate.

<Third embodiment>
In the following embodiment, the correction intensity of the rolling shutter distortion correction is changed based on the information of the subject to be tracked. In the third embodiment, a case where the correction intensity of the rolling shutter distortion correction is changed based on the type of the subject to be tracked will be described.

In S601, 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 type of the subject to be tracked.
In S602, the motion information acquisition unit 109 determines whether or not the type of the subject is a person. When the type of the subject is other than a person (for example, a vehicle such as a vehicle), the process ends without changing the correction strength of the rolling shutter distortion correction. On the other hand, if the type of subject is a person, the process proceeds to 603.

In S603, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction to calculate the correction amount. That is, the RS distortion correction amount calculation unit 110 lowers the correction strength of the rolling shutter distortion correction as compared with the case where the type of the subject is other than a person.

According to the present embodiment, when the subject is a person, the correction strength of the rolling shutter distortion correction is lowered to reduce the distortion of the subject due to the rolling shutter distortion correction and make it easier to recognize the human face. Can be done.
The flowchart of FIG. 6 may be added between S201 and S202 of the flowchart of FIG. 2 described above, and may be appropriately combined with other embodiments such as proceeding to S202 when branching from S602 to NO. ..

<Fourth Embodiment>
In the fourth embodiment, a case where the correction intensity of the rolling shutter distortion correction is changed based on the size of the subject to be tracked will be described.

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 or not the size of the subject is equal to or larger than a predetermined size. If the size of the subject is less than the specified size, the process ends without changing the correction intensity of the rolling shutter distortion correction. On the other hand, if the size of the subject is larger than a predetermined size, the process proceeds to S703.

In S703, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction to calculate the correction amount. That is, the RS distortion correction amount calculation unit 110 lowers the correction strength of the rolling shutter distortion correction as compared with the case where the size of the subject is smaller than a predetermined size.
The flowchart of FIG. 7 may be added between S201 and S202 of the flowchart of FIG. 2 described above, and may be combined with other embodiments as appropriate, such as proceeding to S202 when branching from S702 to NO. ..

<Fifth Embodiment>
In the fifth embodiment, a case where the correction intensity of the rolling shutter distortion correction is changed based on the position of the subject to be tracked will be described.

In S801, 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 position of the subject to be tracked.
In S802, the motion information acquisition unit 109 determines whether or not the position of the subject is off the screen. If the position of the subject does not deviate from the screen and exists in the screen, change the correction strength so that it becomes an appropriate strength. On the other hand, if the position of the subject is out of the screen and does not exist, the process proceeds to S803.

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

<Sixth Embodiment>
In the sixth embodiment, a case where the correction intensity of the rolling shutter distortion correction is changed based on a subject other than the subject to be tracked will be described.

In S901, the motion information acquisition unit 109 acquires the information of the 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 in the screen. If there is no subject other than the subject to be tracked, change the correction intensity so that it is appropriate. On the other hand, if there is a subject other than the subject to be tracked, the process proceeds to S903.

In S903, if the rolling shutter distortion correction is effective with an intensity equal to or higher than a predetermined value, the RS distortion correction amount calculation unit 110 ends without changing the correction intensity of the rolling shutter distortion correction.
The flowchart of FIG. 9 may be added between S201 and S202 of the flowchart of FIG. 2 described above, and may be combined with other embodiments as appropriate, such as proceeding to S202 when branching from S902 to NO. ..

<7th Embodiment>
In the seventh embodiment, a case where the correction intensity of the rolling shutter distortion correction is changed based on the movement of the subject to be tracked will be described.

In S1001, the motion information acquisition unit 109 acquires information on the subject to be tracked. Specifically, the motion information acquisition unit 109 acquires motion information of the subject to be tracked.
In S1002, the motion information acquisition unit 109 determines whether or not the motion of the subject is walking. If the movement of the subject is not walking, the process ends without changing the correction strength of the rolling shutter distortion correction. On the other hand, when the movement of the subject is walking, the process proceeds to S1003.

In S1003, the RS distortion correction amount calculation unit 110 reduces the correction strength of the rolling shutter distortion correction to calculate the correction amount. That is, the RS distortion correction amount calculation unit 110 lowers the correction strength of the rolling shutter distortion correction as compared with the case where the movement of the subject is other than walking.
The flowchart of FIG. 10 may be added between S201 and S202 of the flowchart of FIG. 2 described above, and may be appropriately combined with other embodiments such as proceeding to S202 when branching from S1002 to NO. ..

<Other Embodiments>
The present invention is also realized by executing the following processing. That is, in a process in which a program that realizes 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. be. In this case, the program and the recording medium in 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 can be changed within the scope of the present invention, and the above-described embodiments can be combined in a timely manner. You may.

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

Claims (16)

An imaging device that captures images using the rolling shutter method.
The first acquisition means for acquiring information on the subject to be tracked and photographed,
A second acquisition means for acquiring information on driving at least one of pan drive and tilt drive of the image pickup apparatus, and
A changing means for changing the correction intensity of the 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.
An image pickup apparatus comprising: a correction means for correcting rolling shutter distortion by a correction intensity changed by the changing means. The first acquisition means acquires information on the moving direction of the subject to be tracked and photographed, and obtains information on the moving direction of the subject.
The second acquisition means acquires information on the driving direction based on the driving information, and obtains information on the driving direction.
The changing means
Claim 1 is characterized in that the correction intensity of the rolling shutter distortion correction is changed based on the moving direction of the subject acquired by the first acquisition means and the drive direction acquired by the second acquisition means. The imaging apparatus according to. The first acquisition means acquires information on the speed of the subject to be tracked and photographed, and obtains information on the speed of the subject.
The second acquisition means acquires drive speed information as the drive information, and obtains information on the drive speed.
The changing means
When the speed difference between the speed of the subject acquired by the first acquisition means and the drive speed acquired by the second acquisition means is greater than or equal to a predetermined value, the speed difference is less than a predetermined value. The imaging apparatus according to claim 1 or 2, further comprising increasing the correction intensity of the rolling shutter distortion correction. The changing means
The imaging according to any one of claims 1 to 3, wherein when the subject is driven without tracking, the correction intensity of the rolling shutter distortion correction is increased as compared with the case where the subject is tracked and driven. Device. The first acquisition means acquires information on the position of the subject to be tracked and photographed, and obtains information on the position of the subject.
The second acquisition means acquires information on the state of at least one of the pan drive and the tilt drive, and obtains information on the drive state.
The changing means
At least one of the pan drive and tilt drive states of the image pickup apparatus acquired by the second acquisition means is being driven, and the position of the subject acquired by the first acquisition means is in the image. The image pickup apparatus according to any one of claims 1 to 4, wherein when the positions are the same, the correction intensity of the rolling shutter distortion correction is lowered as compared with the case where the positions are different. The first acquisition means acquires information on the type of subject to be tracked and photographed.
The changing means
The imaging apparatus according to any one of claims 1 to 5, wherein the correction intensity of the rolling shutter distortion correction is changed based on the type of the subject acquired by the first acquisition means. The changing means
The imaging according to claim 6, wherein when the type of the subject acquired by the first acquisition means is a person, the correction intensity of the rolling shutter distortion correction is lowered as compared with the case where the subject is not a person. Device. The first acquisition means acquires information on the size of the subject to be tracked and photographed.
The changing means
The imaging apparatus according to any one of claims 1 to 7, wherein the correction intensity of the rolling shutter distortion correction is changed based on the size of the subject acquired by the first acquisition means. The changing means
The eighth aspect of the present invention is characterized in that when the size of the subject acquired by the first acquisition means is larger than a predetermined size, the correction intensity of the rolling shutter distortion correction is lower than that when the size is smaller than the predetermined size. Imaging device. The first acquisition means acquires information on the position of the subject to be tracked and photographed, and obtains information on the position of the subject.
The changing means
The method according to any one of claims 1 to 9, wherein the correction intensity of the rolling shutter distortion correction is not changed when the position of the subject acquired by the first acquisition means deviates from the screen. Imaging device. The first acquisition means acquires information on a subject other than the subject to be tracked and photographed.
The changing means
Any of claims 1 to 10, wherein the correction intensity of the rolling shutter distortion correction is not changed when there is a subject other than the subject to be tracked and photographed acquired by the first acquisition means. The imaging apparatus according to item 1. The first acquisition means acquires information on the movement of the subject to be tracked and photographed, and obtains information on the movement of the subject.
The changing means
The imaging apparatus according to any one of claims 1 to 11, wherein the correction intensity of the rolling shutter distortion correction is changed based on the movement of the subject acquired by the first acquisition means. The changing means
The imaging according to claim 12, wherein when the movement of the subject acquired by the first acquisition means is walking, the correction intensity of the rolling shutter distortion correction is lowered as compared with the case other than walking. Device. This is a control method for an image pickup device that captures images using the rolling shutter method.
The first acquisition step to acquire the information of the subject to be tracked and photographed,
A second acquisition step of acquiring information on driving of at least one of pan drive and tilt drive of the image pickup apparatus, and
A change step of changing the correction intensity of the rolling shutter distortion correction based on the subject information acquired by the first acquisition step and the drive information acquired by the second acquisition step.
A control method for an image pickup apparatus, comprising: a correction step of performing rolling shutter distortion correction with a correction intensity changed by the change step. A program for causing a computer to function as each means of the image pickup apparatus according to any one of claims 1 to 13. A computer-readable recording medium containing a program for causing the computer to function as each means of the imaging device according to any one of claims 1 to 13.

Images