JP6525710B2 - Imaging device, control method therefor, and program - Google Patents

Description

The present invention relates to an imaging apparatus, a control method thereof, and a program, and more particularly to an imaging apparatus capable of shooting a moving image , a control method thereof, and a program.

  BACKGROUND A digital camera is known as an image processing apparatus capable of shooting a moving image for a short shooting time set by a user, for example, several seconds. Special effects such as fast-forwarding and rewinding may be added to the captured moving image in order to emphasize the movement of the subject and the like. As a technique for adding a special effect, for example, when a digital camera captures a moving image including a plurality of subjects, an area (hereinafter referred to as a "main subject area") indicating the main subject and the main subject area There is known a technique of setting areas (hereinafter referred to as "sub-subject areas") indicating sub-subjects having large depth differences. In this technology, the sub-subject area is first brought into focus and shooting is started, the focus is gradually shifted from the sub-subject area to the main subject area, and the focus is finally adjusted to the main subject area (for example, Patent Document 1) reference). As a result, the display of the sub-subject area changes from a sharp display in focus to an unclear display out of focus, and a change in focus such as a change in the display of the main subject area from a unclear display to a clear display It becomes possible to acquire moving images.

JP, 2010-286752, A

  However, when the technique of Patent Document 1 is used for shooting a moving image in which only a sub-subject region with a small difference in depth with respect to the main subject region is present, the sub-subject region is first focused on the main subject region. Almost in focus. Therefore, even if the focus is gradually shifted from the sub-subject area to the main subject area, the display of the sub-subject area and the display of the main subject area remain almost clear, and it is not possible to shoot moving images whose focus changes. .

An object of the present invention is to provide an imaging device capable of reliably capturing a moving image in which focus is changing, a control method therefor, and a program.

In order to achieve the above object, an imaging apparatus according to the present invention includes distance information acquisition means for acquiring distance information of a plurality of subjects, a photographing start position of a focus lens at the time of moving image photographing, and a movement destination position of a focus lens. Lens position setting means for setting the position of the focus lens in focus on the main subject as the movement destination position, and the difference in depth from the main It is characterized in that the position of the focus lens which is equal to or higher than the threshold is set as the photographing start position.

  According to the present invention, it is possible to reliably capture a moving image whose focus is changing.

FIG. 1 is a block diagram schematically showing a configuration of a camera as an image forming apparatus according to an embodiment of the present invention. It is a flowchart which shows the procedure of the special effect moving image imaging | photography process performed with the camera of FIG. It is a figure which shows an example of the image data image | photographed with the camera of FIG. It is a flowchart which shows the procedure of the classification | category process of step S206 in FIG. It is a flowchart which shows the procedure of the focus change moving image photographing process of step S209 in FIG. It is a flowchart which shows the procedure of the modification of the special effect moving image photographing process of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  In the present embodiment, the case where the present invention is applied to a camera as an image processing apparatus will be described, but the application destination of the present invention is not limited to a camera, and an image processing apparatus capable of focus adjustment during moving image shooting For example, the present invention can be applied.

  FIG. 1 is a block diagram schematically showing a configuration of a camera 100 as an image forming apparatus according to an embodiment of the present invention.

  In FIG. 1, a camera 100 includes a photographing lens 101, a shutter 102, an AE processing unit 103, a focus lens 104, a motor 105, an AF processing unit 106, an imaging element 107, an A / D conversion unit 108, an image processing unit 109, and a format. The conversion unit 110 is provided. The camera 100 further includes a DRAM 111, an external recording I / F 112, a system control unit 113, a VRAM 114, an image display unit 115, and an operation unit 116. The system control unit 113 is mutually connected to the AE processing unit 103, the AF processing unit 106, the image processing unit 109, the DRAM 111, the image display unit 115, and the operation unit 116. The shutter 102 is connected to the AE processing unit 103, and the motor 105 is connected to the focus lens 104 and the AF processing unit 106, respectively. The imaging element 107 is connected to the A / D converter 108, the A / D converter 108 is connected to the image processor 109, and the image processor 109 is connected to the format converter 110. The DRAM 111 is connected to the format conversion unit 110, the external recording I / F 112, and the VRAM 114, and the VRAM 114 is connected to the image display unit 115.

  The camera 100 can shoot a moving image having a short shooting time, for example, a few seconds, and can add a special effect such as highlighting a subject or the motion of the subject to the shot moving image. In the present embodiment, in order to add the effect of emphasizing the subject, for example, shooting of a moving image in which the main subject is gradually brought into focus (focus) is performed.

  The photographing lens 101 includes a zoom mechanism, and the shutter 102 has an aperture function. The AE processing unit 103 controls the shutter 102 to control the amount of light transmitted from the photographing lens 101. The focus lens 104 is movable by driving of the motor 105. The AF processing unit 106 controls the motor 105 to move the position of the focus lens 104. The camera 100 moves the position of the focus lens 104 to adjust the focus of the subject. Further, the AF processing unit 106 analyzes the contrast of the image data based on the image data acquired from the system control unit 113 or the like, and calculates an AF evaluation value indicating the strength of the contrast in the image data based on the analysis result. Do. When the AF evaluation value is high, it indicates that the contrast of the image data is strong, and when the AF evaluation value is low, it indicates that the contrast of the image data is weak. The imaging element 107 receives the light transmitted through the focus lens 104, and photoelectrically converts the received light into an electrical analog signal. In the present embodiment, the imaging element 107 is an imaging element corresponding to the image plane phase difference method, and the camera 100 acquires subject image information having different phases using the imaging element 107, and the acquired phases are different. The subject image information can be used to measure the distance of the subject.

  The A / D conversion unit 108 converts an analog signal photoelectrically converted by the imaging element 107 into a digital signal. An image processing unit 109 generates image data based on the digital signal converted by the A / D conversion unit 108, and determines an area or detects each subject area using an edge component included in the generated image data. . In the present embodiment, a main subject area and a sub-subject area are detected from each photographed subject. A format conversion unit 110 converts the image data generated by the image processing unit 109 into a format readable by the AF processing unit 106 or the like. The DRAM 111 is a high-speed built-in memory, and the external recording I / F 112 performs data communication with various external recording media such as a memory card. The system control unit 113 includes a CPU (not shown) and a storage unit for storing various programs that can be executed by the CPU. The system control unit 113 collectively controls each component connected to the system control unit 113 by the CPU executing various programs stored in the storage unit. The VRAM 114 stores display data necessary for various displays on the image display unit 115. The image display unit 115 displays various screens, for example, a moving image being shot and various setting screens, based on display data stored in the VRAM 114. The operation unit 116 includes various operation buttons, and performs various settings of the camera 100 and various photographing operations.

  FIG. 2 is a flowchart showing the procedure of the special effect moving image shooting process performed by the camera 100 in FIG.

  The processing in FIG. 2 is performed by the system control unit 113 executing various programs, and it is assumed that a moving image of a subject is captured.

  In FIG. 2, first, the system control unit 113 determines whether all the photographed objects are stationary (step S201).

  As a result of the determination in step S201, when one of the photographed objects is not stationary, the system control unit 113 sets the moving image, such as fast-forwarding or reverse, suitable for the moving object as the moving image being photographed. It decides to grant (step S202). Thereafter, the system control unit 113 executes the process of step S202 and ends the present process.

  As a result of the determination in step S201, when all the photographed subjects are stationary, the system control unit 113 divides the photographed image data at equal intervals as shown in FIG. Distance information is calculated for each divided area to generate a distance map. Thereafter, the system control unit 113 acquires distance information of each subject from the generated distance map (step S203) (distance information acquisition unit). The distance map includes distance information between the camera 100 and each subject, and the distance information is calculated based on, for example, the AF evaluation value calculated by the AF processing unit 106 and various information used in the image plane phase difference method.

  Next, the system control unit 113 sets the main subject area 301 out of the divided areas of the generated distance map (step S204). In this embodiment, for example, among the divided areas of the distance map, a divided area located near the center in the distance map and including a face or the like and a divided area adjacent to the divided area are set as the main subject area 301. Do. Next, the system control unit 113 sets a sub-subject area 302 among the divided areas of the generated distance map (step S205). In step S205, the system control unit 113 sets, for example, a divided area corresponding to the background in the sub-object area 302. For example, a sub-subject area 302 is set as a sub-subject area 302 with a sub-area including the sub-area including the subject having the same distance information continuing over a predetermined range, the sub-area including the subject farthest from the camera 100 and the sub-area . Next, the system control unit 113 performs the classification process of FIG. 4 described later (step S206). In the classification process, the system control unit 113 determines the position of the focus lens 104 at the start of shooting (hereinafter referred to as “shooting”) at the start of shooting. Classified as either "available" or "unavailable". Next, the system control unit 113 determines whether or not the sub-subject focus position is available (step S207).

  As a result of the determination in step S207, when the sub-subject focus position is available, the system control unit 113 sets the sub-subject focus position as the imaging start position (step S208) (lens position setting means). Next, the system control unit 113 performs the focus change moving image shooting process of FIG. 5 described later (step S209), moves the position of the focus lens 104, shoots a moving image whose focus changes, and ends this processing. .

  As a result of the determination in step S207, when the sub-object focus position is not available, the system control unit 113 determines whether the main object focus position is near a boundary position that is the boundary of the movable area of the focus lens 104. Is determined (step S210). In the following description, the position of the focus lens 104 focused on the main subject area 301 is the focus position of the main subject, and the boundary position that is the boundary of the movable area of the focus lens 104 is the movement boundary position of the focus lens 104. . For example, when the main subject focus position is in the vicinity of the movement boundary position of the focus lens 104, it is the case of a landscape as shown in FIG. 3 (b). In this case, the distance information of the main subject area is almost infinite.

  As a result of the determination in step S210, when the main subject focus position is near the movement boundary position of the focus lens 104, the system control unit 113 sets the shooting start position based on the movement boundary position of the focus lens 104 (step S211). . Specifically, the system control unit 113 moves along the optical axis toward the inside of the movable area of the focus lens 104, that is, the position where the main object area 301 can not be focused by moving in the direction away from the movement boundary position. Is set as the shooting start position (lens position setting means). Thus, the system control unit 113 can reliably set the imaging start position to the position of the movable area of the focus lens 104. In step S211, the position of the focus lens 104 focusing on another subject area where the difference between the main subject area 301 and the depth is a predetermined threshold defined in advance is set as a position where the main subject area 301 is not in focus. Ru. In the present embodiment, the predetermined threshold is 10 depths or more, but the threshold can be set as appropriate. In the following description, the position of the focus lens 104 focusing on another subject area where the difference between the main subject area and the depth is a predetermined threshold value is taken as the other subject focus position. Next, the system control unit 113 performs the process of step S209 and ends the present process.

  If it is determined in step S210 that the main subject focus position is not in the vicinity of the movement boundary position of the focus lens 104, the system control unit 113 sets another subject focus position as the shooting start position (step S212) (lens position setting) means). That is, in the present embodiment, the position of the focus lens 104 not in focus on the main subject area 301 is always set as the shooting start position. Next, the system control unit 113 performs the process of step S209 and ends the present process.

  In the process of FIG. 2, in step S205, a divided area including areas other than the face having a predetermined ratio, specifically, a size of 1/4 to 1/5 or less with respect to the size of the face included in the main subject area 301. A sub-subject area may be set from the detected divided area by detecting (detecting means).

  FIG. 4 is a flowchart showing the procedure of the classification process of step S206 in FIG.

  In FIG. 4, first, the system control unit 113 calculates the main subject focus position (step S401). After that, the system control unit 113 sets the calculated main subject focus position to the position of the movement destination of the focus lens 104 used in the focus change moving image shooting process of FIG. 5 described later (hereinafter referred to as “movement destination position”). Yes (lens position setting means). Next, the system control unit 113 calculates the sub-subject focus position (step S402). In steps S401 and S402, for example, based on the average value of each of the distance information of the main object area 301 and the distance information of the sub object area 302 or the AF evaluation value calculated by the AF processing unit 106, The subject focus position is calculated. Next, the system control unit 113 calculates the amount of movement of the focus lens 104 based on the difference between the main subject focus position and the sub subject focus position (step S403). Next, the system control unit 113 calculates the moving speed of the focus lens 104 based on the calculated moving amount of the focus lens 104 and the preset shooting time (hereinafter referred to as “shooting set time”) (step S404). ). The photographing set time (execution time) is preset by the user (execution time setting means). In the present embodiment, in order to emphasize the main subject, after focusing on the main subject region 301, shooting is performed without moving the position of the focus lens 104 for a predetermined time. Therefore, in step S404, the moving speed of the focus lens 104 is calculated based on the amount of movement of the focus lens 104 and the predetermined time for which the position of the focus lens 104 is not moved from the shooting setting time. Next, the system control unit 113 causes the calculated movement speed of the focus lens 104 to exceed the maximum movement speed at which the focus lens 104 can be moved in advance (hereinafter referred to as “maximum movement speed of the focus lens 104”). It is determined whether or not there is (step S405). The maximum moving speed of the focus lens 104 is the drive limit speed of the motor 105 that moves the focus lens 104.

  If it is determined in step S405 that the moving speed of the focus lens 104 exceeds the maximum moving speed, the system control unit 113 determines that the interval between the sub-subject focus position and the main subject focus position is too long. After that, the system control unit 113 determines whether the moving speed of the focus lens 104 can be adjusted by changing the aperture value (step S406). The aperture value is used to adjust the movement amount of the focus lens 104 by adjusting the depth of field indicating the range of depth in which each object is in focus. For example, if an aperture value larger than the set aperture value is set, the interval between the sub-subject focus position and the main subject focus position can be shortened, and the focus lens 104 is moved from the sub-subject focus position to the main subject focus position The amount of movement decreases. As a result, the moving speed of the focus lens 104 can be made slower than the moving speed of the focus lens 104 calculated in step S404. In step S406, for example, when it is possible to adjust the movement amount of the focus lens 104 to a movement amount not exceeding the maximum movement speed by setting an aperture value larger than the set diaphragm value, the movement speed of the focus lens 104 is adjusted. It is determined that it is possible. On the other hand, if it is not possible to adjust the amount of movement of the focus lens 104 to the amount of movement that does not exceed the maximum movement speed even if an aperture value larger than the set diaphragm value is set, adjustment of the movement speed of the focus lens 104 is impossible It is determined that

  If it is determined in step S406 that the moving speed of the focus lens 104 can not be adjusted, the system control unit 113 determines that the sub-subject focus position can not be set to the position of the focus lens 104 at the start of shooting. Thereafter, the system control unit 113 classifies the sub-subject focus position as unavailable (step S407), and performs the processing of step S207 and thereafter in FIG.

  If it is determined in step S406 that the moving speed of the focus lens 104 can be adjusted, the system control unit 113 selects an aperture value to be changed (hereinafter, referred to as "changed aperture value"). Next, the system control unit 113 stores the selected changed aperture value in the DRAM 111 or the like (step S408), and calculates moving amounts of the main subject focus position and the sub-subject focus position when the changed aperture value is set (step S409). Next, the system control unit 113 calculates the amount of movement of the focus lens 104 (step S410), classifies the sub-subject focus position as usable (step S411), and performs the processing from step S207 in FIG.

  As a result of the determination in step S405, when the moving speed of the focus lens 104 does not exceed the maximum moving speed, the system control unit 113 determines whether the main subject area 301 is at least a predetermined depth difference from the sub subject area 302. It discriminates (step S412). The predetermined depth indicates a depth at which the sub-subject region 302 is not in focus at the main subject focus position and is sufficiently blurred, and in the present embodiment, indicates a depth of 10 or more.

  As a result of the determination in step S412, when the main subject area 301 is not greater than the predetermined depth difference with the sub subject area 302, the system control unit 113 can adjust the depths of the main subject area 301 and the sub subject area 302 or not. Is determined (step S413). In step S413, for example, when it is possible to adjust the depths of the main subject region 301 and the sub-subject region 302 to a predetermined depth difference or more by setting an aperture value smaller than the set aperture value, the main subject region 301 and the sub-subject It is determined that the depth of the area 302 can be adjusted. On the other hand, if it is not possible to adjust the depths of the main subject region 301 and the sub-subject region 302 beyond the predetermined depth difference even if the aperture value smaller than the set aperture value is set, the main subject region 301 and the sub-subject region 302 It is determined that the adjustment of the depth of

  If the depths of the main subject area 301 and the sub-subject area 302 are adjustable as a result of the determination in step S413, the changed aperture value is stored in the DRAM 111 or the like (step S414), and the processes in step S411 and subsequent steps are performed.

  If the depths of the main subject region 301 and the sub-subject region 302 can not be adjusted as a result of the determination in step S413, the system control unit 113 performs the processing of step S407 and subsequent steps.

  If it is determined in step S412 that the main subject area 301 is equal to or larger than the predetermined depth difference with the sub-subject area 302, the system control unit 113 performs the processing in step S411 and subsequent steps.

  FIG. 5 is a flowchart showing the procedure of the focus change moving image shooting process of step S209 in FIG.

  In FIG. 5, first, the system control unit 113 determines whether to change the setting of the aperture value (step S501). In the present embodiment, for example, when the changed aperture value is stored in the DRAM 111 or the like, the system control unit 113 determines that the setting of the aperture value is changed. On the other hand, when the changed aperture value is not stored in the DRAM 111 or the like, the system control unit 113 determines that the setting of the aperture value is not changed.

  As a result of the determination in step S501, when changing the setting of the aperture value, the system control unit 113 sets the changed aperture value stored in the DRAM 111 or the like (step S502). Next, the system control unit 113 moves the focus lens 104 to the imaging start position set in any one of steps S208, S211, and S212 (step S503). For example, when the sub-subject focus position is the shooting start position, as shown in FIG. 3B, the sub-subject region 302 becomes clear, and a moving image in which the main subject region 301 becomes unclear is captured. Next, the system control unit 113 starts shooting a moving image (step S504), and moves the focus lens 104 from the shooting start position to the movement destination position (step S505). Thereby, in the sub-subject area 302, the clear display (for example, FIG. 3C) changes to an unclear display (for example, FIG. 3D), and in the main subject area 301, the unclear display (for example, FIG. 3) A moving image changing from (c) to a clear display (for example, FIG. 3D) is captured. Next, in order to emphasize the main subject, the system control unit 113 maintains the position of the focus lens 104 at the main subject focus position and performs shooting for a predetermined time (step S506). In the present embodiment, the predetermined time is about one second. Next, the system control unit 113 completes the imaging (step S507), and ends the present process.

  According to the processing in FIGS. 2, 4 and 5, the position of the focus lens 104 which is not focused on the main subject area 301 is set as the shooting start position, and the main subject focus position is at the movement destination position of the focus lens 104. It is set. Further, the shooting start position is set based on the distance information of each subject. As a result, the position of the focus lens 104 focusing on another subject area having distance information with a small difference from the distance information of the main subject area is prevented from being set as the shooting start position, and the main subject is It is possible to prevent the subject region from being in focus. As a result, it is possible to reliably capture a moving image in which the focus of the focus lens 104 changes such that the main object area is not in focus and the main object area is in focus.

  Further, according to the processing in FIGS. 2, 4 and 5, the position of the focus lens 104 at which the difference between the main subject area 301 and the depth is equal to or larger than the threshold is set as the imaging start position. As a result, it is possible to reliably prevent the main subject from being focused from the start of shooting of a moving image.

  According to the processes of FIGS. 2, 4 and 5, after the main subject area 301 is in focus, shooting is performed without moving the position of the focus lens 104 for a predetermined time. Thus, it is possible to lengthen the time during which the main subject region is in focus in the moving image, and it is possible to obtain a moving image in which the main subject is emphasized.

  Further, according to the processing of FIGS. 2, 4 and 5, when the main subject is not in focus at the sub-subject focus position, the sub-subject focus position is set to the imaging start position. Thus, the shooting start position can be easily set without using the distance information of the main subject region and the distance information of the other subject regions, and the moving image in which the focus of the focus lens 104 changes can be simplified. Can be obtained.

  As mentioned above, although this invention was demonstrated using embodiment, this invention is not limited to embodiment mentioned above.

  For example, as shown in FIG. 6 described later, the user may set each of the main subject area 301 and the sub-subject area 302 (subject area setting means).

  FIG. 6 is a flowchart showing the procedure of a modification of the special effect moving image shooting process of FIG.

  The processing in FIG. 6 is performed by the system control unit 113 executing various programs, and it is assumed that a moving image of a subject is captured.

  In FIG. 6, first, the system control unit 113 executes the same process as step S201 in FIG.

  As a result of the determination in step S201, when one of the photographed objects is not stationary, the system control unit 113 gives the user a warning notification indicating that the object can not be set (step S601). , And return to the process of step S201.

  As a result of the determination in step S201, when all the photographed subjects are stationary, the system control unit 113 determines whether the main subject area 301 is selected by the user (step S602). Thereafter, when main subject region 301 is selected (YES in step S602), system control unit 113 determines whether or not sub-subject region 302 is selected (step S603). In the present embodiment, in the image displayed on image display unit 115, the regions selected by the user are set as main subject region 301 and sub-subject region 302, respectively. Thereafter, when sub-subject region 302 is selected (YES in step S603), system control unit 113 executes the processing in steps S206 and S207 in FIG.

  As a result of the determination in step S207, when the sub-subject focus position is not available, the system control unit 113 allows the user to select whether to set the sub-subject region 302 again on the image display unit 115. Display After that, the system control unit 113 determines whether to set the sub-subject area 302 again based on the user's selection (step S604).

  When it is determined in step S604 that the setting of the sub-subject region 302 is to be performed again, the system control unit 113 returns to step S603. On the other hand, when it is determined in step S604 that the setting of the sub-subject region 302 is not to be performed again, the system control unit 113 executes the processing after step S210 in FIG. 2 and ends the present processing.

  As a result of the determination in step S207, when the sub-subject focus position is available, the system control unit 113 executes the processing after step S208 in FIG. 2 and ends the present processing.

  According to the process of FIG. 6, since each of the main subject area 301 and the sub-subject area 302 is set by the user, the convenience of the user in obtaining a moving image in which the focus of the focus lens 104 changes is improved. be able to.

  The present invention supplies a program that implements one or more functions of the above-described embodiments to a system or apparatus via a network or storage medium, and one or more processors in a computer of the system or apparatus read and execute the program. Can also be realized. It can also be implemented by a circuit (eg, an ASIC) that implements one or more functions.

100 camera 104 focus lens 113 system control unit 301 main subject area 302 sub subject area

Claims (8)

Distance information acquisition means for acquiring distance information of a plurality of subjects;
Lens position setting means for setting each of a shooting start position of the focus lens and a movement destination position of the focus lens at the time of moving image shooting;
The lens position setting means sets the position of the focus lens in focus on the main subject as the movement destination position, and starts the photographing of the position of the focus lens at which the difference in depth with the main subject is equal to or more than a predetermined threshold. An imaging apparatus characterized by being set at a position. The focus lens is defined with a maximum movable speed which can move.
The lens position setting means sets the position of the focus lens at which the moving speed of the focus lens does not exceed the maximum moving speed at the time of moving image shooting and the focus of the main subject is not at the shooting start position. setting an imaging apparatus according to claim 1 Symbol mounting, characterized in that. A movable area of the focus lens is defined,
The lens position setting means sets a position of the focus lens which does not exceed the movable region of the focus lens and which does not focus on the main subject as the photographing start position. 1 or 2 SL placing of the imaging apparatus. The image processing apparatus further comprises determination means for determining whether or not the position of the focusing lens in focus on the main subject is near a boundary position which is a boundary of the movable region of the focus lens.
When it is determined by the determination unit that the position of the focus lens in focus on the main subject is in the vicinity of the boundary position that is the boundary of the movable region of the focus lens, the lens position setting unit may 4. The image pickup apparatus according to claim 3, wherein a position of a focus lens which is located in a direction away from the position and in which the main subject is not in focus is set as the photographing start position. The apparatus further comprises execution time setting means for setting an execution time of the moving image shooting,
During the moving image shooting, the focus lens is moved from the movement destination position for a time excluding the time required for the focus lens to move from the shooting start position to the movement destination position from the set execution time. The imaging apparatus according to any one of claims 1 to 4, wherein moving image shooting is performed without causing the moving image to be captured. The plurality of subjects include sub-subjects different from the main subject,
It further comprises detection means for detecting each of a main subject area indicating the main subject and a sub subject area indicating the sub subject.
When the face is included in the main subject area, the detection unit is configured to detect an area other than the face smaller than a predetermined ratio with respect to the size of the face included in the main subject area as the sub-subject area. The imaging device according to claim 1 . It is a control method of an imaging apparatus for performing video shooting, and
A distance information acquisition step of acquiring distance information of a plurality of subjects;
A lens position setting step of setting each of a shooting start position of the focus lens and a movement destination position of the focus lens at the time of moving image shooting;
The lens position setting step sets the position of the focus lens in focus on the main subject as the movement destination position, and starts photographing the position of the focus lens where the difference in depth from the main subject is equal to or more than a predetermined threshold The control method characterized by setting to a position. In a program that causes a computer to execute a control method of an imaging device that shoots a moving image, the control method of the imaging device is
A distance information acquisition step of acquiring distance information of a plurality of subjects;
A lens position setting step of setting each of a shooting start position of the focus lens and a movement destination position of the focus lens at the time of moving image shooting;
The lens position setting step sets the position of the focus lens in focus on the main subject as the movement destination position, and starts photographing the position of the focus lens where the difference in depth from the main subject is equal to or more than a predetermined threshold A program characterized by setting at a position.