Control unit, lens device, imaging apparatus, control method, and program

Abstract

To provide a control unit that can prevent a deterioration in image quality during tilt driving.SOLUTION: A control unit (110) has: acquisition means (105) that acquires a tilt amount for tilting an optical axis of an optical system (101) with respect to an imaging surface, or a shift amount for moving the optical axis of the optical system in a direction orthogonal to the optical axis; and determination means (104) that, based on the tilt amount or the shift amount, determines the amount of change in the angle of view in the optical system or the amount of change in a focus frame displayed on a display unit (206).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a control device, a lens device, an imaging device, a control method, and a program. [Background technology]

[0002] Conventionally, imaging optical systems have been known that have a tilt mechanism that tilts the focal plane by driving a lens group according to Scheimpflug's law, and a shift mechanism that shifts the focal plane. However, imaging optical systems with tilt mechanisms suffer from a field-angle shift (composition shift) that occurs when the lens group is tilted, which impairs user convenience. Patent Document 1 discloses a processing device that drives a shift lens group during tilt driving to offset the field-angle shift. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-91027 Summary of the Invention [Problem to be solved by the invention]

[0004] In the processing device disclosed in Patent Document 1, the shift lens group is driven during tilt driving, thereby using an area outside the image circle, which results in degradation of image quality.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a control device that can suppress deterioration in image quality during tilt driving. [Means for solving the problem]

[0006] A control device as one aspect of the present invention has an acquisition means for acquiring a tilt amount for inclining the optical axis of an optical system relative to an imaging surface, or a shift amount for moving the optical axis of the optical system in a direction perpendicular to the optical axis, and a determination means for determining, based on the tilt amount or the shift amount, an amount of change in the angle of view of the optical system, or an amount of change in the focus frame displayed on a display unit.

[0007] Other objects and features of the present invention are illustrated in the following examples. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a control device that can suppress deterioration of image quality during tilt driving. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a block diagram of an imaging device in each embodiment. [Figure 2] 1A to 1C are explanatory diagrams of the Scheimpflug principle and composition shift in each embodiment. [Figure 3] 10A and 10B are explanatory diagrams of the movement of the focusing frame accompanying a composition shift in the first embodiment. [Figure 4] 10 is a flowchart showing the process of moving the focusing frame when the TS amount is designated by the lens operation unit in each embodiment. [Figure 5] 10 is a flowchart showing the process of moving the focusing frame when the TS amount is designated by the camera operation unit in each embodiment. [Figure 6] 10 is a flowchart showing the process of moving the focusing frame when the amount of change in the focusing frame is calculated by the camera body in each embodiment. [Figure 7] 10A and 10B are explanatory diagrams of the movement and deformation of the focusing frame accompanying a composition shift in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] First, the configuration of an image capture device 10 in each embodiment will be described with reference to Fig. 1. Fig. 1 is a block diagram of the image capture device 10. The image capture device 10 is configured to include a camera body 200 and an interchangeable lens (lens device) 100 that is detachable from the camera body 200. However, each embodiment is not limited to this, and can also be applied to an image capture device in which the camera body and lens device are configured as an integrated unit.

[0012] The interchangeable lens 100 is mechanically and electrically connected to the camera body 200 via a mount (not shown). The interchangeable lens 100 receives a supply of power from the camera body 200 via an electrical terminal (not shown) provided on the mount. The interchangeable lens 100 then uses the power received from the camera body 200 to control various actuators (described below) and a lens microcomputer (control device) 110. The camera body 200 communicates with the interchangeable lens 100 via camera communication means 202 provided on the mount, and controls the interchangeable lens 100 by sending control commands to the interchangeable lens 100.

[0013] The camera body 200 includes an image sensor 201 with a phase-difference AF sensor function, a camera communication unit 202, a TS acquisition unit 203, a signal processing unit 204, a camera calculation unit 205, a display unit 206, a camera operation unit 207, a camera control unit 208, and a camera microcomputer 209. The image sensor 201 is a photoelectric conversion element such as a CMOS sensor or a CCD sensor, and photoelectrically converts a subject image (optical image) formed by the imaging optical system in the interchangeable lens 100 to output an electrical signal (analog signal). The analog signal output from the image sensor 201 is converted into a digital signal by an A / D conversion circuit (not shown). The TS acquisition unit (acquisition unit) 203 acquires a tilt amount for tilting the optical axis of the optical system 101 (the principal plane of the optical system 101) with respect to the imaging surface, and a shift amount (TS amount) for moving the optical axis of the optical system 101 in a direction perpendicular to the optical axis. Note that in each embodiment, the TS acquisition unit 203 may acquire at least one of the tilt amount and the shift amount. This also applies to the input means 105 described below.

[0014] The signal processing unit 204 performs various image processing on the digital signal from the A / D conversion circuit to generate a video signal. The signal processing unit 204 also generates, from the video signal, focus information indicating the contrast state of the subject image, i.e., the focus state of the imaging optical system, and luminance information indicating the exposure state. The signal processing unit 204 also outputs the video signal to a display unit 206, which displays the video signal as a live view image used to check the composition, focus state, etc. The signal processing unit 204 also outputs the video signal to a recording processing unit (not shown). The recording processing unit stores the video signal as still images or moving image data in an external memory or the like.

[0015] Camera microcomputer 209, which serves as a camera control unit (control device), controls camera body 200 in response to inputs from an image capture instruction switch and various setting switches included in camera operation unit (operation unit) 207. Camera communication means 202 transmits control commands in response to inputs from camera operation unit 207 to lens microcomputer 110 via the communication terminal unit.

[0016] Interchangeable lens 100 includes optical system (image pickup optical system) 101, movement means 102 for moving the lens group of optical system 101, and detection means 103 for detecting lens information. Interchangeable lens 100 also includes lens operation unit (operation unit) 108 for specifying the TS amount, storage means 109 for storing optical information of interchangeable lens 100, and lens microcomputer 110. Optical system 101 includes at least two shift lens units, including first shift lens unit 101a and second shift lens unit 101b. Lens microcomputer 110 includes lens calculation means 104 for calculating the amount of change in composition or the amount of movement of the focusing frame from the lens information described above, input means 105 for inputting the TS amount, and lens control means 106 for controlling optical system 101 in accordance with the input TS amount. Here, the amount of structural change corresponds to the amount of change in the angle of view of optical system 101, and the amount of movement of the focusing frame corresponds to the amount of change in the focusing frame displayed on display unit 206.

[0017] The storage means 109 stores data (functions or coefficients) that indicate the relationship between the amount of tilt or shift and the amount of change in composition or the amount of movement of the focusing frame. However, each embodiment is not limited to this, and such data may be stored in a storage means (not shown) of the camera body 200. The lens calculation means 104 or the camera calculation means 205 is a determination means that calculates (determines) the amount of change in composition or the amount of movement of the focusing frame using the amount of tilt or shift and the data stored in the storage means.

[0018] The interchangeable lens 100 has a lens communication means 107 for communicating with the camera body 200. Although not shown in Fig. 1, the interchangeable lens 100 also has a focus lens for adjusting the focus, a zoom lens for changing the focal length, an aperture unit for adjusting the amount of light, an image stabilization lens for correcting image shake, a gyro sensor for detecting the attitude, and the like.

[0019] The interchangeable lens 100 provides a TS amount to the input means 105 in accordance with the amount of operation of the lens operation unit 108. The input means 105 is an acquisition means for acquiring the TS amount and transmits the acquired TS amount to the lens control means 106. The lens control means 106 calculates a control amount for achieving a desired TS amount and moves the first shift lens unit 101a and the second shift lens unit 101b independently of each other in directions that include a component perpendicular to the optical axis direction via the movement means. By driving at least two shift lens units in this manner, image plane tilt is generated by decentering the lenses, and tilt drive and shift drive (TS drive) can be achieved.

[0020] Here, the Scheimpflug principle and the accompanying composition shift (angle of view shift) will be described with reference to Figures 2(a) to 2(c). Figures 2(a) to 2(c) are explanatory diagrams of the Scheimpflug principle and composition shift (composition change). When the principal plane of the optical system 101 or the image sensor 201 in the interchangeable lens 100 is tilted, the in-focus range on the subject side is determined according to the Scheimpflug principle.

[0021] FIG. 2(a) shows the in-focus range when the principal plane of the optical system 101 is not tilted relative to the imaging plane. FIG. 2(b) shows the in-focus range when the principal plane of the optical system 101 is tilted relative to the imaging plane, with the principal point of the optical system 101 as the rotation center (rotation axis). FIG. 2(c) shows the composition shift from FIG. 2(a) when the principal plane of the optical system 101 is tilted relative to the imaging plane, with the rotation center located closer to the imaging plane than the principal point of the optical system 101. In FIGS. 2(a) to 2(c), 300a, 300b, and 300c are the imaging plane, and 301a, 301b, and 301c are the principal planes of the optical system 101. 302a and 302b are the in-focus object planes, and 302c is the object plane after the composition shift (not the in-focus plane). 303c is the rotation center of the optical system 101, and 304c is the amount of composition shift.

[0022] As shown in Figure 2(b), the Scheimpflug principle states that when the imaging plane 300b and the principal plane of the optical system 301b intersect at a certain linear intersection point, the subject plane 302b also passes through the same intersection point. If the center of rotation is located in front of or behind the principal point of the optical system 101, the optical axis changes, causing a composition shift. In this case as well, the Scheimpflug principle holds true.

[0023] When the subject to be photographed has depth, tilting the subject plane to follow that depth allows the subject to be in focus from the foreground to the background. When focusing on a depth area with a lens that does not have a tilt mechanism, narrowing the aperture to increase the depth of field is a common method. However, with a tilt lens, even with the aperture fully open, tilting the lens makes it possible to focus on the depth. Conversely, tilting the principal plane of the optical system 101 in the opposite direction to the inclination of the subject with depth allows the subject plane to intersect the depth direction of the subject at an angle close to a right angle. In this case, the in-focus range can be made extremely narrow, allowing for diorama-style images to be captured.

[0024] Note that each embodiment is not limited to the configuration described above. In each embodiment, TS drive is achieved by decentering the lens, but a configuration having a tilt mechanism that moves the lens barrel of the interchangeable lens 100 itself to drive the TS may also be used. Each embodiment will be described in detail below. [Example]

[0025] First, a description will be given of a first embodiment of the present invention. In this embodiment, when a composition shift (angle of view shift) occurs due to TS driving, the focusing frame displayed on the display unit 206 is moved in accordance with the composition shift.

[0026] The movement of the focusing frame in this embodiment will be described with reference to FIGS. 1, 3(a), 3(b) through 6. FIGS. 3(a) and 3(b) are explanatory diagrams of the movement of the focusing frame accompanying a composition shift, showing an example of the composition shift and the movement of the focusing frame in the configuration shown in FIG. 2(c). FIG. 3(a) shows a subject 400a and a focusing frame 401a displayed on the display unit 206 when the optical axis of the optical system 101 is not tilted relative to the imaging plane. The subject 400a is located at an arbitrary distance and is parallel to the imaging plane. FIG. 3(b) shows a subject 400b, a focusing frame 401b before movement, and a focusing frame 402b after movement displayed on the display unit 206 when the principal plane of the optical system 101 is tilted relative to the imaging plane, with the imaging plane side being closer to the principal point of the optical system 101 as the center of rotation, as shown in FIG. 2(c). While the subject 400b would normally have portions that are out of focus due to the tilt effect, these are not shown for simplicity.

[0027] Next, the process of moving the focusing frame will be described with reference to Fig. 4. Fig. 4 is a flowchart showing the process of moving the focusing frame, and shows the process of moving the focusing frame when the tilt amount and shift amount (TS amount) are specified by the lens operation unit 108.

[0028] First, in step S100, the user operates the lens operation unit 108 of the interchangeable lens 100, and in step S101, the TS amount is input to the lens control means 106 by the input means 105. Here, the lens operation unit 108 may be any operation member that allows the user to input the desired TS amount value or select the level of the TS amount from multiple levels (large, medium, small, etc.). Examples of the lens operation unit 108 include, but are not limited to, an electronic monitor, a rotary dial, or an ON / OFF switch.

[0029] The TS amount may be determined by the user operating the camera operation unit 207 of the camera body 200, as shown in Fig. 5. Fig. 5 shows the process of moving the focusing frame when the TS amount is specified by the camera operation unit 207. At this time, when the user operates the camera operation unit 207 in step S204, the camera control means 208 converts the operation of the camera operation unit 207 into a TS amount in step S205. Then, in step S206, the camera control means 208 transmits the TS amount to the lens control means 106 via the camera communication means 202 and the lens communication means 107.

[0030] Next, in step S102, the detection means 103 detects lens information such as positional information of each lens constituting the optical system 101. Next, in step S103, the lens control means 106 calculates a control amount for the movement means 102 to drive the first shift lens unit 101a and the second shift lens unit 101b so as to realize the input TS amount. Then, the lens control means 106 transmits the calculated control amount to the movement means 102 to control the movement means 102. The control amount is calculated using the lens information detected in step S102 and optical information of the interchangeable lens 100 stored in the storage means 109. Next, in step S104, the movement means 102 drives the lens group of the optical system 101 (the first shift lens unit 101a and the second shift lens unit 101b) based on the control amount.

[0031] Next, in step S105, the lens calculation means (calculation means) 104 calculates the amount of change in composition or the amount of change in focus frame using the lens information detected in step S102 and optical information stored in the storage means 109. Here, the lens information or optical information includes, but is not limited to, the zoom position (focal length), the focus position (subject distance), the TS amount, and the position of the rotation axis of the optical system 101. Note that the lens calculation means 104 may also use the size of the image sensor 201 when calculating the amount of change in composition or the amount of change in focus frame. Next, in step S106, the lens calculation means 104 transmits the calculated amount of change in composition or the amount of change in focus frame to the camera body 200 via the lens communication means 107.

[0032] Next, in step S200, the camera body 200 receives the amount of composition change or the amount of focus frame change via the camera communication means 202 and outputs it to the camera calculation means (calculation means) 205. Next, in step S201, the camera calculation means 205 determines whether or not it has received the amount of composition change (whether or not the received information is the amount of composition change). If it has received the amount of composition change, the process proceeds to step S202. In step S202, the camera calculation means 205 calculates the amount of focus frame change based on the amount of composition change. Next, in step S203, the display unit 206 changes the position of the displayed focus frame based on the amount of focus frame change calculated by the camera calculation means 205.

[0033] On the other hand, if the amount of change in composition has not been received in step S201 (if the received information is the amount of change in the focusing frame), the process proceeds to step S203. In step S203, the display unit 206 changes the position of the displayed focusing frame based on the amount of change in the focusing frame received from the interchangeable lens 100.

[0034] In this embodiment, as shown in Fig. 6, when the TS amount is acquired by operating the camera operation unit 207 of the camera body 200 or when the TS amount is acquired by the TS acquisition unit 203, the acquired TS amount may be transmitted to the camera calculation means 205. Fig. 6 is a flowchart showing the process of moving the focusing frame when the focusing frame change amount is calculated by the camera body 200. First, in step S207, the user acquires the TS amount by operating the camera operation unit 207 or by using the TS acquisition unit 203. Next, in step S208, the camera calculation means 205 calculates the focusing frame change amount based on the TS amount. Then, in step S203, the display unit 206 changes the position of the displayed focusing frame based on the focusing frame change amount calculated by the camera calculation means 205.

[0035] As described above, when a composition shift occurs due to TS driving, the focus frame displayed on the display unit 206 is moved in accordance with the composition shift. That is, in this embodiment, the focus frame follows the composition shift. This allows the user to easily focus on the intended subject, improving user operability and suppressing degradation of image quality. [Example]

[0036] Next, a second embodiment of the present invention will be described with reference to Figures 7(a) and (b). In this embodiment, when a composition shift (angle of view shift) occurs due to TS driving or a change in the in-focus subject plane occurs, the focus frame displayed on the display unit 206 is moved and deformed in accordance with the composition shift or the change in the subject plane. In this embodiment, the movement and sequence of the focus frame are the same as in the first embodiment, so a description thereof will be omitted.

[0037] 7(a) and 7(b) are explanatory diagrams illustrating the movement and deformation of the focusing frame accompanying a composition shift in this embodiment, showing an example of the composition shift that occurs in the configuration shown in FIG. 2(c) and the movement of the focusing frame in this embodiment. FIG. 7(a) shows a subject 500a and a focusing frame 501a displayed on the display unit 206 when the optical axis of the optical system 101 is not tilted relative to the imaging plane. FIG. 7(b) shows a subject 500b, a focusing frame 501b before movement, and a focusing frame 502b after movement and deformation displayed on the display unit 206 when the principal plane of the optical system 101 is tilted relative to the imaging plane, with the imaging plane side being closer to the principal point of the optical system as the center of rotation, as shown in FIG. 2(c). Subject 500b would normally have portions that are out of focus due to the tilt effect, but these are not shown for simplicity.

[0038] Next, the processing for deforming the in-focus frame in this embodiment will be described. Note that the processing up to when the camera calculation means 205 calculates the amount of composition change from the TS amount is the same as in the first embodiment, and therefore a description thereof will be omitted. The calculated amount of composition change is transmitted to the camera body 200 via the lens communication means 107. The camera body 200 receives the amount of composition change via the camera communication means 202 and outputs the amount of composition change to the camera calculation means 205. The camera calculation means 205 calculates (determines) the amount of deformation (amount of change) of the size or shape of the in-focus frame based on the amount of composition change. The display unit 206 changes the size or shape of the displayed in-focus frame (deforms the in-focus frame) based on the amount of deformation of the in-focus frame calculated by the camera calculation means 205.

[0039] Furthermore, when the TS amount is acquired by operating camera operation unit 207 of camera body 200, or when the TS amount is acquired by TS acquisition unit 203, the acquired TS amount is sent to camera calculation means 205, which calculates the amount of deformation of the focus frame. Display unit 206 changes the size or shape of the displayed focus frame (deforms the focus frame) based on the amount of deformation calculated by camera calculation means 205.

[0040] As described above, when TS driving causes a composition shift and a change in the plane of the subject in focus, the focus frame displayed on the display unit 206 is moved and deformed. That is, in this embodiment, the focus frame tracks and deforms in accordance with the composition shift. This allows the user to easily focus on the intended subject and understand changes in the plane of the subject in focus, improving user operability and suppressing degradation of image quality.

[0041] (Other Examples) The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program. It can also be realized by a circuit (e.g., ASIC) that realizes one or more functions.

[0042] According to each embodiment, it is possible to suppress deterioration in image quality during tilt driving, and therefore it is possible to provide a control device, lens device, imaging device, control method, and program that can smoothly transition to focusing operation while suppressing deterioration in image quality even when a shift in the angle of view occurs.

[0043] The disclosure of each embodiment includes the following configurations and methods. (Configuration 1) an acquisition unit for acquiring a tilt amount for inclining an optical axis of an optical system with respect to an imaging surface, or a shift amount for moving the optical axis of the optical system in a direction perpendicular to the optical axis; and a determination unit that determines an amount of change in the angle of view of the optical system or an amount of change in a focusing frame displayed on a display unit based on the amount of tilt or the amount of shift. (Configuration 2) further comprising a storage means for storing data indicating a relationship between the tilt amount or the shift amount and the change amount of the angle of view or the change amount of the focusing frame; The control device according to configuration 1, wherein the determining means determines the amount of change in the angle of view or the amount of change in the focusing frame using the amount of tilt or the amount of shift and the data. (Configuration 3) The control device according to configuration 1 or 2, wherein the determining means further determines the amount of change in the angle of view or the amount of change in the focusing frame based on a zoom position, a focus position, or the position of a rotation axis when tilting the optical axis of the optical system with respect to the imaging surface. (Configuration 4) The control device according to any one of configurations 1 to 3, further comprising a display control means for moving the position of the focusing frame displayed on the display unit based on the amount of change in the angle of view or the amount of change in the focusing frame. (Configuration 5) The control device according to configuration 4, wherein the display control means changes the size or shape of the focus frame displayed on the display unit based on the amount of change in the angle of view or the amount of change in the focus frame. (Configuration 6) An optical system; A lens device comprising: a control device according to any one of configurations 1 to 5. (Configuration 7) 7. The lens device according to configuration 6, further comprising an operation unit for a user to set the tilt amount or the shift amount. (Configuration 8) the lens device is detachable from the imaging device; The lens device according to configuration 6 or 7, wherein the amount of change in the angle of view or the amount of change in the focusing frame is transmitted from the lens device to the imaging device. (Configuration 9) An imaging element; a display unit that displays a focus frame; An imaging device comprising: a control device according to any one of configurations 1 to 5. (Configuration 10) 10. The imaging device according to configuration 9, further comprising an operation unit for allowing a user to set the tilt amount or the shift amount. (Configuration 11) 11. The imaging device according to configuration 9 or 10, further comprising a display control means for moving the position of the focusing frame displayed on the display unit based on the amount of change in the angle of view or the amount of change in the focusing frame. (Method 1) acquiring a tilt amount for tilting the optical axis of the optical system with respect to an imaging surface, or a shift amount for moving the optical axis of the optical system in a direction perpendicular to the optical axis; and determining an amount of change in the angle of view in the optical system or an amount of change in the focus frame displayed on a display means based on the amount of tilt or the amount of shift. (Configuration 12) A program that causes a computer to execute the control method described in Method 1.

[0044] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention. [Explanation of symbols]

[0045] 104 Lens calculation means (determination means) 105 Input means (acquisition means) 110 Lens microcomputer (control device) 203 TS acquisition unit (acquisition means) 205 Camera calculation means (determination means) 206 Display section 209 Camera microcomputer (control device)

Claims

1. An acquisition means for acquiring information regarding a tilt amount when tilting an optical axis of an optical system with respect to an imaging surface, or information regarding a shift amount when moving the optical axis in a direction perpendicular to the optical axis; A control device, comprising: a determination means for outputting information regarding a change amount of an angle of view in the optical system or information regarding a change amount of a focusing frame indicating a focusing target displayed on a display unit based on the information regarding the tilt amount or the information regarding the shift amount.

2. The control device according to claim 1, wherein the determination means determines the change amount of the angle of view or the change amount of the focusing frame based on information indicating a relationship between the tilt amount or the shift amount and the change amount of the angle of view or the change amount of the focusing frame.

3. The control device according to claim 1, wherein the determination means outputs information regarding a change amount of the angle of view or information regarding a change amount of the focusing frame based on a zoom position of the optical system, a focus position, or a position of a rotation axis when tilting the optical axis with respect to the imaging surface.

4. The control device according to claim 1, further comprising a control means for moving a position of the focusing frame displayed on the display unit based on the information regarding the change amount of the angle of view or the information regarding the change amount of the focusing frame.

5. The control device according to claim 1, further comprising a control means for changing a size or a shape of the focusing frame displayed on the display unit based on the information regarding the change amount of the angle of view or the information regarding the change amount of the focusing frame.

6. A lens device, comprising: the control device according to any one of claims 1 to 5; and the optical system.

7. The lens device according to claim 6, further comprising an operation unit for a user to set the tilt amount or the shift amount.

8. The lens device according to claim 6, wherein the lens device is detachable from an imaging device.

9. The lens device according to claim 6, wherein the information regarding the change amount of the angle of view or the information regarding the change amount of the focusing frame is transmitted to an imaging device.

10. An imaging device, comprising: the control device according to any one of claims 1 to 5; an imaging element including the imaging surface; and the display unit.

11. The imaging device according to claim 10, further comprising an operation unit for a user to set the tilt amount or the shift amount.

12. The imaging device according to claim 10, further comprising control means for moving the position of the in-focus frame displayed on the display unit based on information regarding the amount of change in the angle of view or information regarding the amount of change in the in-focus frame.

13. Obtaining information regarding the tilt amount when tilting the optical axis of the optical system with respect to the imaging surface, or information regarding the shift amount when moving the optical axis in a direction perpendicular to the optical axis; Outputting information regarding the amount of change in the angle of view in the optical system or information regarding the amount of change in the in-focus frame indicating the in-focus target displayed on the display means based on the information regarding the tilt amount or the information regarding the shift amount. A control method characterized by comprising:

14. A program characterized by causing a computer to execute the control method according to claim 13.

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