Control apparatus, image capturing apparatus, control method, and storage medium

Abstract

To provide a control device capable of more appropriately performing a specific operation.SOLUTION: The control device (5) has a control means (5a) for controlling the first shake correction means and the second shake correction means, and a selection means (5b) for selecting which of the first shake correction means and the second shake correction means is used to perform a specific operation according to the exposure time.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Conventionally, imaging devices have been known that enhance the image stabilization effect by, for example, moving multiple image stabilization units in a coordinated manner. Image stabilization units are sometimes used for purposes other than image stabilization. For example, super-resolution photography, in which image stabilization units are moved by minute amounts of less than one pixel and combined to increase resolution, and LPF drive, in which the image stabilization units are moved by minute amounts to allow the subject light beam to enter multiple pixels of the image sensor, resulting in an optical low-pass filter effect.

[0003] Patent Document 1 discloses a method for performing image stabilization and pixel shift super-resolution using a driver that performs pixel shifting and a correction unit that performs image stabilization. Patent Document 2 discloses a method for determining which image stabilization unit to use for image stabilization by comparing the power consumption of multiple image stabilization units when driving an LPF using image stabilization units. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-96301 [Patent Document 2] Japanese Patent Publication No. 2022-011043 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the method disclosed in Patent Document 1 does not take into account the characteristics of the drive unit and the correction unit, which may result in a stroke shortage.The method disclosed in Patent Document 2 may not be able to achieve good performance if power consumption is the only criterion used for determination.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a control device that is capable of more appropriately performing a specific operation. [Means for solving the problem]

[0007] A control device according to one aspect of the present invention includes a control means for controlling a first blur correction means and a second blur correction means, and a selection means for selecting whether to use the first blur correction means or the second blur correction means to perform a specific operation depending on an exposure time.

[0008] Other objects and features of the present invention are illustrated in the following examples. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a control device that can more appropriately perform a specific operation. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are a central cross-sectional view and a block diagram showing an electrical configuration of an imaging system in each embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the vibration isolation mechanism in each embodiment. [Figure 3(a)] 1 is a flowchart showing a process in the first embodiment. [Figure 3(b)] 1 is a flowchart showing a process in the first embodiment. [Figure 3(c)] 1 is a flowchart showing a process in the first embodiment. [Figure 4] FIG. 10 is an explanatory diagram of the operation of a low-pass filter in the second embodiment. [Figure 5] FIG. 10 is an explanatory diagram of the operation of a low-pass filter in the second embodiment. [Figure 6] 10 is a flowchart showing a process in the second embodiment. [Figure 7] 10 is a flowchart showing a process in a third embodiment. [Figure 8]10 is a flowchart showing a process in a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Example]

[0012] First, an imaging system (camera system) 100 according to a first embodiment of the present invention will be described with reference to Figures 1(a) and 1(b). Figure 1(a) is a central cross-sectional view of the imaging system 100, and Figure 1(b) is a block diagram showing the electrical configuration of the imaging system 100. Components in Figures 1(a) and 1(b) that are assigned the same reference numerals correspond to each other.

[0013] 1(a) and 1(b), reference numeral 1 denotes an imaging device (camera body), 2 denotes a lens device (interchangeable lens) attached to the imaging device 1, 3 denotes an imaging optical system consisting of multiple lenses, 4 denotes the optical axis of the imaging optical system 3, 6 denotes an imaging element, and 9a denotes a rear display device. Also, 9b denotes an EVF (electronic viewfinder), 11 denotes electrical contacts between the imaging device 1 and the lens device 2, 12 denotes a lens system control unit provided in the lens device 2, 14 denotes an anti-vibration mechanism, 15 denotes a blur detection means, 16 denotes a shutter mechanism, and 17 denotes a lens memory.

[0014] In this embodiment, the lens device 2 is configured to be detachable from the imaging device 1, but this is not limiting and the present invention is also applicable to an imaging system in which a lens device and an imaging device are integrated together. This also applies to the other embodiments.

[0015] An imaging system 100 consisting of an imaging device 1 and a lens device 2 has an imaging means, an image processing means, a recording / playback means, and a control means. The imaging means includes an imaging optical system 3, an image sensor 6, and a shutter mechanism 16. The image processing means includes an image processing unit 7. The recording / playback means includes a memory means 8 and a display means 9 (rear display device 9a, EVF 9b). The control means includes a camera system control circuit (control device) 5, an operation detection unit 10, a lens system control circuit 12, a lens driving means 13, an anti-vibration mechanism 14, and a shake detection means 15. The lens driving means 13 can drive a focusing lens, a shake correction lens, an aperture (aperture stop), and the like. The anti-vibration mechanism 14 and the lens driving means 13 each constitute at least one of a first shake correction means or a second shake correction means.

[0016] The shake detection means 15 can detect rotational shake of the device, including rotation around the optical axis 4, and may use a vibration gyroscope or the like. The vibration isolation mechanism 14 is a mechanism that translates the image sensor 6 in a plane perpendicular to the optical axis 4 and rotates it around the optical axis 4. The specific structure of this mechanism will be described later.

[0017] The imaging means is an optical processing system that forms an image of light from an object on the imaging surface of the imaging element 6 via the imaging optical system 3. Since the imaging element 6 provides a focus evaluation amount / appropriate exposure amount, the imaging optical system 3 is appropriately adjusted based on this signal, exposing the imaging element 6 to an appropriate amount of object light and forming a subject image near the imaging element 6. The shutter mechanism 16 controls whether or not the subject image reaches the imaging element 6 by moving a shutter curtain. The shutter mechanism 16 is controlled based on the exposure time (shutter speed) commanded by the camera system control circuit 5.

[0018] The image processing unit 7 has an internal A / D converter, a white balance adjustment circuit, a gamma correction circuit, an interpolation calculation circuit, etc., and is capable of generating images for recording. The image processing unit 7 also has a positioning means and an image synthesis means (not shown). The specific operations of these will be described later. The image processing unit 7 also compresses images, videos, audio, etc. using a predetermined method. The memory means 8 has a storage unit for storing images. The camera system control circuit 5 outputs to the recording unit of the memory means 8 and displays an image to be presented to the user on the display means 9.

[0019] The camera system control circuit 5 generates and outputs timing signals for image capture. It controls the image capture system, image processing system, and recording / playback system in response to external operations. For example, an operation detection unit 10 detects the pressing of a shutter release button (not shown) and controls the drive of the image sensor 6, the operation of the image processing unit 7, and compression processing. The camera system control circuit 5 also includes a positioning ON / OFF unit and an image synthesis ON / OFF unit (not shown) that respectively turn on and off the operation of the positioning unit and image synthesis unit. The camera system control circuit 5 also includes a shake correction control unit (not shown). The shake correction control unit generates a target value for the vibration isolation mechanism 14 based on a signal from the shake detection unit 15 and controls its drive. The camera system control circuit 5 also controls the state of each segment of the information display device that displays information on the display unit 9. The rear display device 9a is a touch panel and is connected to the operation detection unit 10.

[0020] The camera system control circuit 5 has a control unit 5a and a selection unit 5b. The control unit 5a controls the first and second image stabilization units. The selection unit 5b selects whether to use the first or second image stabilization unit to perform a specific operation depending on the exposure time (shutter speed). Here, the specific operation may be, but is not limited to, a image stabilization operation, a super-resolution operation, or a low-pass filter operation, as described below.

[0021] When the user looks into the EVF 9b, the display unit 9 turns off the rear display device 9a and uses the EVF 9b to present information; otherwise, it uses the rear display device 9a to present information. The rear display device 9a and the EVF 9b have different pixel counts and viewing magnifications, and the required image quality is different. Therefore, there are differences in the readout from the image sensor 6 and the subsequent image processing, as described below.

[0022] Next, we will explain the adjustment operation of the optical system of the control system. The camera system control circuit 5 is connected to the image processing unit 7, which determines the appropriate focus position and aperture value based on the signal from the image sensor 6. In other words, the camera system control circuit 5 performs photometry and distance measurement based on the signal from the image sensor 6, and determines the exposure conditions (F-number, shutter speed, ISO sensitivity, etc.).

[0023] Camera system control circuit 5 outputs a command signal to lens system control circuit 12 via electrical contact 11. Lens system control circuit 12 appropriately controls lens driving means 13. In a mode in which image stabilization is performed, camera system control circuit 5 appropriately controls the image stabilization lens via lens driving means 13 based on a signal obtained from image sensor 6, which will be described later.

[0024] Next, a brief description of the control flow of the image stabilization unit of this embodiment will be given. In this embodiment, the image stabilization unit comprises a blur detection unit 15 that detects blur, an image stabilization mechanism 14 that performs image stabilization (image stabilization), and an image stabilization control unit provided in the camera system control circuit 5. An operation (S1) of half-pressing a shutter release button (not shown) to initiate a preliminary shooting operation is detected by the operation detection unit 10. This is the so-called aiming operation that determines the composition of the image. At this time, image stabilization is performed using the image stabilization mechanism 14 to facilitate composing the image. That is, image stabilization is achieved by appropriately controlling the image stabilization mechanism 14 based on a signal from the image stabilization unit 15. Subsequently, an operation (S2) of fully pressing the shutter release button to initiate a shooting operation is detected by the operation detection unit 10. At this time, image stabilization is performed using the image stabilization mechanism 14 to suppress blurring of the subject image captured by exposure. The image stabilization operation is stopped after a certain time has elapsed since the exposure.

[0025] Next, the image sensor 6 of this embodiment will be described. The image sensor 6 is capable of outputting images in various formats, such as so-called still images or videos. Videos have multiple formats, and the aspect ratio, resolution of recorded images, and the like can be changed. The image sensor 6 also has a mode (HDR, noise reduction, etc.) for acquiring and synthesizing a group of temporally consecutive still images. In other words, the image sensor 6 may acquire a group of temporally consecutive images, regardless of whether they are still images or videos.

[0026] Next, the image vibration isolation mechanism (image plane vibration isolation mechanism) 14 of this embodiment will be described with reference to Fig. 2. Fig. 2 is an exploded perspective view of the mechanism of the image vibration isolation mechanism 14 that performs shake correction for low-frequency shake (although there is a separate electrical mechanism for control, this is not included). In Fig. 2, vertical lines are parallel to the optical axis 4. In Fig. 2, non-moving members (fixed parts) are numbered in the 100s, moving members (movable parts) are numbered in the 200s, and balls sandwiched between the fixed part and the movable part are numbered in the 300s.

[0027] In Figure 2, 101 denotes an upper yoke, 102a, 102b, and 102c denote screws, 103a, 103b, 103c, 103d, 103e, and 103f denote upper magnets, 104a and 104b denote auxiliary spacers, and 105a, 105b, and 105c denote main spacers. 106a, 106b, and 106c denote fixed portion rolling plates, 107a, 107b, 107c, 107d, 107e, and 107f denote lower magnets, 108 denotes a lower yoke, 109a, 109b, and 109c denote screws, and 110 denotes a base plate. 201 denotes an FPC (Flexible Printed Circuit), and 202a, 202b, and 202c denote mounting positions for position detection elements. Reference numeral 203 denotes a movable frame (movable PCB: Printed Circuit Board), 204a, 204b, and 204c denote movable rolling plates, 205a, 205b, and 205c denote coils, 206 denotes a movable frame, and 301a, 301b, and 301c denote balls. Reference numeral 207 denotes a piezoelectric element, which is a unit that moves the imaging element 6 at high speed.

[0028] Upper yoke 101, upper magnets 103a, 103b, 103c, 103d, 103e, and 103f, lower magnets 107a, 107b, 107c, 107d, 107e, and 107f, and lower yoke 108 form a magnetic circuit, or a so-called closed magnetic circuit. Upper magnets 103a, 103b, 103c, 103d, 103e, and 103f are adhesively fixed in a state of being attracted to upper yoke 101. Similarly, lower magnets 107a, 107b, 107c, 107d, 107e, and 107f are adhesively fixed in a state of being attracted to lower yoke 108. Upper magnets 103a, 103b, 103c, 103d, 103e, and 103f and lower magnets 107a, 107b, 107c, 107d, 107e, and 107f are each magnetized in the optical axis direction (the up-down direction in FIG. 2). Adjacent magnets (those positioned relative to upper magnets 103a and 103b) are magnetized in different directions. Opposing magnets (those positioned relative to upper magnet 103a and lower magnet 107a) are magnetized in the same direction. This generates a strong magnetic flux density in the optical axis direction between upper yoke 101 and lower yoke 108.

[0029] A strong attractive force is generated between the upper yoke 101 and the lower yoke 108. Therefore, the main spacers 105a, 105b, and 105c and the auxiliary spacers 104a and 104b are configured to maintain an appropriate distance. Here, the appropriate distance is a distance that allows the coils 205a, 205b, and 205c and the FPC 201 to be positioned between the upper magnets 103a to 103f and the lower magnets 107a to 107f while ensuring an appropriate gap. The main spacers 105a, 105b, and 105c have screw holes, and the upper yoke 101 is fixed to the main spacers 105a, 105b, and 105c with screws 102a, 102b, and 102c. Rubber is attached to the body of the main spacers 105a, 105b, and 105c, forming the mechanical end (so-called stopper) of the moving part.

[0030] Holes are provided in base plate 110 to avoid lower magnets 107a, 107b, 107c, 107d, 107e, and 107f, and the faces of the magnets protrude from these holes. That is, base plate 110 and lower yoke 108 are fixed with screws 109a, 109b, and 109c, and lower magnets 107a to 107f, which have a larger dimension in the thickness direction than base plate 110, are fixed so as to protrude from base plate 110.

[0031] The movable frame 203 is made of magnesium die-cast or aluminum die-cast, and is lightweight and highly rigid. Each element of the movable portion is fixed to the movable frame 203 to form the movable portion. Position detection elements are attached to the surface of the FPC 201 that is not visible in FIG. 2 at positions indicated by position detection element attachment positions 202a, 202b, and 202c. For example, a Hall element or the like can be used to detect position using the magnetic circuit described above. Because the Hall element is small, it is placed so that it is nested inside the windings of the coils 205a, 205b, and 205c.

[0032] An imaging element 6, coils 205a, 205b, 205c, and a Hall element (not shown) are connected to the movable frame 203. Electrical communication with the outside is performed via a connector on the movable frame 203.

[0033] Fixed portion rolling plates 106a, 106b, and 106c are adhesively fixed to base plate 110, and movable portion rolling plates 204a, 204b, and 204c are adhesively fixed to movable frame 203, forming the rolling surfaces of balls 301a, 301b, and 301c. By providing the rolling plates separately, it becomes easy to design the surface roughness, hardness, and other properties to a desired state.

[0034] In the above-described configuration, passing a current through the coil generates a force according to Fleming's left-hand rule, which moves the movable part. Furthermore, feedback control can be performed using the signal from the Hall element, which is the position detection element described above. By appropriately controlling the value of the Hall element signal, the movable frame 203 can translate within a plane perpendicular to the optical axis 4 and rotate around the optical axis.

[0035] By driving the Hall element signals at the position detection element mounting positions 202b and 202c in opposite phases while keeping the signal of the Hall element at the position detection element mounting position 202a constant, it is possible to generate rotational motion approximately around the optical axis 4.

[0036] At the position detector attachment positions 202a, 202b, and 202c, magnetic flux density is detected in the optical axis direction. The characteristics of the magnetic circuit consisting of the upper magnets 103a, 103b, 103c, 103d, 103e, and 103f and the lower magnets 107a, 107b, 107c, 107d, 107e, and 107f are generally nonlinear. Therefore, the magnetic flux density detected at the position detector attachment positions 202a, 202b, and 202c does not necessarily have a constant resolution throughout the entire drive range (the detection resolution varies). That is, there are positions where the magnetic flux density changes steeply and positions where it changes gently, and the steeper the position, the higher the detection resolution (the greater the change in magnetic flux density relative to the amount of movement). In the magnetic circuit shown in Figure 2, the change in magnetic flux density is greatest at the boundary position of the magnets (for example, the boundary position between the upper magnets 103a and 103b), and the detection resolution is high. Since many proposals have been made regarding the details of the control method, no further details will be given here.

[0037] The vibration isolation mechanism 14 includes a vibration isolation mechanism 207 that compensates for vibrations of even higher frequencies than the vibration isolation mechanism 14 shown in FIG. 2. In a mechanism that compensates for low-frequency vibrations, a force according to Fleming's left-hand rule is generated by passing a current through a coil, which moves the moving part. On the other hand, the vibration isolation mechanism 207 can compensate for even high-frequency vibrations by moving the moving part using a piezoelectric element. Hereinafter, a mechanism that compensates for high-frequency vibrations is referred to as a high-speed vibration isolation mechanism. A mechanism that compensates for high-frequency vibrations has a small stroke. Hereinafter, a mechanism that compensates for low-frequency vibrations is referred to as a low-speed vibration isolation mechanism. A mechanism that compensates for low-frequency vibrations has a longer stroke than a high-speed vibration isolation mechanism. Note that the method of moving the moving part is not limited to using a piezoelectric element, and other methods may be used.

[0038] In this embodiment, an example has been described in which multiple vibration isolation mechanisms are provided in the imaging device 1, but this is not limiting, and multiple vibration isolation mechanisms may be provided in the lens device 2. In the imaging system 100, for example, it is possible to provide a maximum of four vibration isolation mechanisms, such as two vibration isolation mechanisms in the imaging device 1 and two vibration isolation mechanisms in the lens device 2, and the number of vibration isolation mechanisms can be reduced or increased in combination.

[0039] Super-resolution is a widely known function that increases resolution by moving the vibration isolation mechanism by a minute amount less than one pixel and combining the images. Note that the super-resolution method is not important.

[0040] The low-speed vibration reduction mechanism corresponds to the first vibration reduction means. The high-speed vibration reduction mechanism corresponds to the second vibration reduction means. The image stabilization operation (shake reduction operation) corresponds to the first operation. The super-resolution operation corresponds to the second operation. The exposure time (predetermined time) that serves as the basis for switching the vibration reduction mechanism is the period during which high-frequency camera shake becomes less dominant, and is often approximately (1 / focal length) seconds. The predetermined time may be determined taking into account the balance with vibration reduction performance and differences in the way people shake.

[0041] Next, with reference to Figures 3(a), 3(b), and 3(c), the image blur correction operation (control method) in the imaging device 1 and the lens device 2 will be described. Figures 3(a), 3(b), and 3(c) are flowcharts showing the control method in this embodiment.

[0042] First, in step S501 of FIG. 3(a), the camera system control circuit 5 determines whether or not to perform handheld super-resolution processing. If it is determined that handheld super-resolution processing is to be performed, the process proceeds to step S502. On the other hand, if it is determined that handheld super-resolution processing is not to be performed, the process proceeds to step S503. In step S502, the camera system control circuit 5 performs handheld super-resolution processing. Details of the handheld super-resolution processing (alignment image synthesis processing: step S502) will be described with reference to FIG. 3(b). In step S503, the camera system control circuit 5 performs normal processing. Details of the normal processing (step S503) will be described with reference to FIG. 3(c).

[0043] In step S521 of FIG. 3(b), the camera system control circuit 5 starts handheld super-resolution shooting. Subsequently, in step S522, the camera system control circuit 5 starts exposure. Subsequently, in step S523, the camera system control circuit 5 determines whether the exposure time is short or long (for example, whether the exposure time is shorter than a predetermined time). Here, the threshold (predetermined time) for determining that the exposure time is short is determined according to the respective performance of the low-speed vibration isolation mechanism and the high-speed vibration isolation mechanism, the focal length, and the like. In this embodiment, the threshold is determined based on approximately "1 / focal length" seconds, but is not limited to this. If it is determined that the exposure time is shorter than the predetermined time, the process proceeds to step S524. On the other hand, if it is determined that the exposure time is not shorter than the predetermined time, the process proceeds to step S525.

[0044] In step S524, the camera system control circuit 5 performs image stabilization using the high-speed vibration reduction mechanism, and performs handheld super-resolution using the low-speed vibration reduction mechanism. In step S525, the camera system control circuit 5 performs image stabilization using the low-speed vibration reduction mechanism, and performs handheld super-resolution using the high-speed vibration reduction mechanism. After step S524 or step S525 is completed, the process proceeds to step S526.

[0045] In step S526, if all planned shooting has been completed, the camera system control circuit 5 ends shooting and proceeds to step S527. On the other hand, if all shooting has not yet been completed, the process returns to step S522 and performs the remaining exposures. In step S527, the captured images are synthesized while being shifted little by little to generate a super-resolution image (super-resolution image synthesis).

[0046] 3(c) is a flowchart of the normal processing (S503). Note that the normal processing described in this embodiment is merely an example, and other processing may be used. First, in step S510, the camera system control circuit 5 determines whether exposure has started. If it is determined that exposure has not started, the determination of step S510 is repeated. On the other hand, if it is determined that exposure has started, the process proceeds to step S511.

[0047] In step S511, the camera system control circuit 5 performs image stabilization using the low-speed vibration isolation mechanism and the high-speed vibration isolation mechanism. Subsequently, in step S512, the camera system control circuit 5 determines whether exposure has ended. If it is determined that exposure has not ended, step S511 is repeated. On the other hand, if it is determined that exposure has ended, this flow ends.

[0048] When one high-speed vibration isolation mechanism and one low-speed vibration isolation mechanism are provided (when two vibration isolation mechanisms are provided), they are used as described above. Below, we will explain the case where three or more vibration isolation mechanisms are provided.

[0049] There are several possible combinations, but one example is a configuration in which the imaging device 1 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism, and the lens device 2 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism (a configuration in which a total of four vibration isolation mechanisms are provided). Another configuration is a configuration in which the imaging device 1 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism, and the lens device 2 is provided with a low-speed vibration isolation mechanism (a configuration in which a total of three vibration isolation mechanisms are provided). Another configuration is a configuration in which the imaging device 1 is provided with a low-speed vibration isolation mechanism, and the lens device 2 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism (a configuration in which a total of three vibration isolation mechanisms are provided). The imaging device 1 may be provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism, and the lens device 2 may be provided with a high-speed vibration isolation mechanism, or vice versa. Even when a total of two vibration isolation mechanisms are provided, the lens device 2 may be provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism, or the imaging device 1 may be provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism. Furthermore, the imaging device 1 may be provided with a high-speed vibration isolation mechanism and the lens device 2 with a low-speed vibration isolation mechanism, or vice versa. The high-speed vibration isolation mechanism and the low-speed vibration isolation mechanism may be provided in other combinations not described in this embodiment.

[0050] Below, we will explain how to properly use a total of four vibration isolation mechanisms when imaging device 1 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism, and lens device 2 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism.

[0051] When the exposure time is long, image stabilization is performed using the low-speed vibration reduction mechanism of the lens device 2. On the other hand, when the exposure time is short, image stabilization is performed using the high-speed vibration reduction mechanism of the lens device 2. Image stabilization involving rotation around the optical axis is performed using the high-speed vibration reduction mechanism of the imaging device 1, whether the exposure time is short or long.

[0052] Furthermore, when the exposure time is long, the super-resolution processing is performed using the low-speed vibration isolation mechanism of the lens device 2. On the other hand, when the exposure time is short, the super-resolution processing is performed using either the high-speed vibration isolation mechanism of the lens device 2 or the high-speed vibration isolation mechanism of the imaging device 1.

[0053] Furthermore, image stabilization during aiming is performed using either the high-speed vibration isolation mechanism of the lens device 2 or the high-speed vibration isolation mechanism of the imaging device 1. Generally, when the focal length is long, the stroke of the vibration isolation mechanism of the lens device 2 is longer than the compensation angle of the vibration isolation mechanism of the imaging device 1. For this reason, when the exposure time is short, it is better to use different vibration isolation mechanisms to increase the stroke during aiming and use the remaining vibration isolation mechanism for super-resolution processing, which will increase the stroke during aiming. Conversely, when the focal length is short, the stroke of the vibration isolation mechanism of the imaging device 1 is longer than that of the lens device 2. When the exposure time is short, the impact of high-frequency camera shake is greater, so image stabilization is performed using a high-speed vibration isolation mechanism. This allows high-frequency camera shake to be appropriately compensated for.

[0054] When the exposure time is long, large-amplitude image stabilization becomes dominant over high-frequency image stabilization. Therefore, image stabilization can be performed with high precision by using a low-speed image stabilization mechanism. Because rotation around the optical axis can only be corrected by the image stabilization mechanism of the imaging device 1, correction is performed using the high-speed image stabilization mechanism of the imaging device 1. This allows high-frequency image stabilization to be performed as well. By selectively using image stabilization mechanisms according to their characteristics, high-frequency image stabilization can be performed when the exposure time is short, and large-amplitude image stabilization can be performed when the exposure time is long. Furthermore, by using image stabilization mechanisms that are not used for image stabilization or super-resolution for image stabilization during aiming or for image stabilization of rotation around the optical axis, ease of shooting and image stabilization performance are improved. By selectively using these mechanisms, high-precision handheld super-resolution can be achieved regardless of the exposure time.

[0055] Next, the use of a configuration in which the lens device 2 is provided with a low-speed vibration isolation mechanism and the imaging device 1 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism (a configuration with three vibration isolation mechanisms) will be described.

[0056] When the exposure time is short, image stabilization is performed using the high-speed vibration reduction mechanism of the imaging device 1. When the exposure time is long and the focal length is long, image stabilization is performed using the low-speed vibration reduction mechanism of the lens device 2. When the exposure time is long and the focal length is short, image stabilization is performed using the low-speed vibration reduction mechanism of the imaging device 1. When the exposure time is short and the focal length is long, super-resolution is performed using the low-speed vibration reduction mechanism of the lens device 2. When the exposure time is short and the focal length is short, super-resolution is performed using the low-speed vibration reduction mechanism of the imaging device 1. When the exposure time is long, super-resolution is performed using the high-speed vibration reduction mechanism of the imaging device 1. During aiming, when the focal length is long, correction is performed using the low-speed vibration reduction mechanism of the imaging device 1, and when the focal length is short, correction is performed using the low-speed vibration reduction mechanism of the lens device 2.

[0057] When the exposure time is short, a high-speed vibration reduction mechanism is used to correct camera shake, and when the exposure time is long, a low-speed vibration reduction mechanism is used to correct camera shake. This makes it possible to correct the high-frequency camera shake that predominates when the exposure time is short, and to correct the large-amplitude camera shake that predominates when the exposure time is long. In addition, by correcting shake during aiming using the vibration reduction mechanism that is not used for vibration reduction, the ease of shooting can be improved.

[0058] Next, the proper use of a configuration in which the lens device 2 is provided with a high-speed vibration isolation mechanism and a low-speed vibration isolation mechanism, and the imaging device 1 is provided with a low-speed vibration isolation mechanism (a configuration with three vibration isolation mechanisms) will be described.

[0059] When the exposure time is short, image stabilization is performed using the high-speed vibration reduction mechanism of the lens device 2, and when the exposure time is long and the focal length is long, image stabilization is performed using the low-speed vibration reduction mechanism of the lens device 2. When the exposure time is long and the focal length is short, image stabilization is performed using the low-speed vibration reduction mechanism of the imaging device 1. When the exposure time is short and the focal length is long, super-resolution is performed using the low-speed vibration reduction mechanism of the lens device 2. When the exposure time is short and the focal length is short, super-resolution is performed using the low-speed vibration reduction mechanism of the imaging device 1. When the exposure time is long, super-resolution is performed using the high-speed vibration reduction mechanism of the lens device 2. During aiming, when the focal length is long, correction is performed using the low-speed vibration reduction mechanism of the imaging device 1, and when the focal length is short, correction is performed using the low-speed vibration reduction mechanism of the lens device 2.

[0060] When the exposure time is short, image stabilization is performed using a high-speed vibration reduction mechanism, and when the exposure time is long, image stabilization is performed using a low-speed vibration reduction mechanism. This makes it possible to correct the high-frequency camera shake that predominates when the exposure time is short, and to correct the large-amplitude camera shake that predominates when the exposure time is long. In addition, by correcting shake during aiming using the vibration reduction mechanism that is not used for vibration reduction, the ease of shooting can be improved.

[0061] According to this embodiment, when the first and second operations are performed using a plurality of vibration isolation mechanisms (shake correction means), both the first and second operations can be performed appropriately by changing which of the plurality of vibration isolation mechanisms to use depending on the exposure time. [Example]

[0062] Next, a second embodiment of the present invention will be described with reference to FIGS. 4(a) and 4(b) to 6. In this embodiment, LPF driving (low-pass filter operation) using an image stabilization mechanism 14 will be described. LPF driving is an operation that obtains an optical low-pass filter effect by moving the image stabilization means by a small amount and causing the subject light beam to be incident on multiple pixels of the image sensor 6. Note that the basic configuration of the imaging system of this embodiment is the same as the imaging system 100 described in the first embodiment with reference to FIGS. 1(a) and 1(b), and therefore a description thereof will be omitted.

[0063] Figures 4(a) and (b) are explanatory diagrams of low-pass filter operation, showing enlarged views of the image sensor section (pixel section) of the image sensor 6. Figures 4(a) and (b) show only four pixels: B pixel 6a, G pixel 6b, G pixel 6c, and R pixel 6d. Figures 5(a) and (b) are graphs showing the drive amount of the vibration isolation mechanism 14. Figure 5(a) shows the change over time in the drive amount of the image sensor 6 in the X and Y directions, while Figure 5(b) shows the drive amount when the horizontal axis is the X direction and the vertical axis is the Y direction.

[0064] In Figure 4(a), four pixels are arranged in a matrix with R, G, and B pixels, each with a color filter arranged at pixel pitch p, and in reality, multiple pixels are arranged in this array repeatedly. When performing LPF drive with vibration isolation mechanism 14, image sensor 6 is moved at a uniform speed in an arc with a diameter d, as indicated by circular arrow 101 shown in Figure 4(a). Hereinafter, the operation of moving image sensor 6 at a uniform speed in an arc is referred to as circular operation. Arrow 101 is shown passing through approximately the center of each of pixels 6a to 6d, and diameter d is given by the following equation (1):

[0065] d=p / √2 …(1) When the arc-shaped movement described above is performed during exposure for a still image, the light beam incident on the B pixel 6a during non-operation is uniformly incident on each of the pixels 6a to 6d. By making the subject light beam incident on multiple pixels of the image sensor, an optical LPF effect can be obtained (low-pass filter operation).

[0066] To achieve the LPF effect, the above-mentioned circular operation needs to be performed for at least one cycle during still image exposure, and it is desirable to perform circular operation for an integer multiple of the cycle during the exposure time. Alternatively, if the number of circular operations is not an integer multiple, unevenness will occur due to differences in the amount of light incident on the four pixels. However, if the circular operation is performed at a high frequency with a cycle that is sufficiently short compared to the exposure time, the difference in the amount of light incident on each pixel will be small, and a sufficient LPF effect can be achieved. High-frequency driving of circular operation simplifies control because there is no need to change the frequency of the circular operation depending on the exposure time.

[0067] Therefore, in this embodiment, the LPF effect is achieved by performing high-frequency circular movement drive in the LPF drive mode. In this embodiment, the diameter d of the circle of the circular movement is set to the value shown in equation (1), but is not limited to this. The LPF effect can be strengthened by increasing the diameter of the circular movement. Furthermore, when pixel data is intermittently extracted from the pixels of the image sensor 6 to display a preview on the display means 9 before the image capture exposure operation, the diameter d may be changed according to the interval between the intermittently extracted pixels.

[0068] Alternatively, the LPF effect may be obtained by driving as shown in Fig. 4(b). Fig. 4(b) shows another operation of the LPF drive, and like Fig. 4(a), shows an enlarged view of only four pixels 6a to 6d. When performing LPF drive with the vibration isolation mechanism 14, the LPF effect can be obtained by moving the image sensor 6 at a constant speed in a rectangular shape with one side p, as shown by the arrow 102 in Fig. 4(b).

[0069] Next, a method for driving the vibration isolation mechanism 14 will be described with reference to FIGS. 5(a) and 5(b). In FIG. 5(a), the amount of drive in the X direction by the vibration isolation mechanism 14 is indicated by a solid line, and the amount of drive in the Y direction is indicated by a dashed line. In FIG. 5(a), the X direction is driven by a sine wave with an amplitude of d / 2 and a frequency of f [Hz]. On the other hand, the Y direction is driven by a sine wave with an amplitude of d / 2 and a frequency of f [Hz], but with a phase shift of π / 2 from the X direction. FIG. 5(b) shows the movement of the center of the image sensor 6 on the XY plane when the operation shown in FIG. 5(a) is performed. As shown in FIG. 5(b), the image sensor 6 moves in a circle with a radius of d / 2, similar to the movement shown in FIG. 4(a). Driving the vibration isolation mechanism 14 in this manner can achieve an LPF effect. This drive control, which performs circular movement at high frequencies, is called the LPF drive mode.

[0070] Up to this point, we have discussed the LPF drive mode of the vibration isolation mechanism 14, but now we will discuss the LPF drive mode of the lens drive means 13. In the LPF drive mode, the lens drive means 13 shifts the shift lens in the X and Y directions, driving it so that the light beam focused on pixel 6a in FIG. 4(a) moves as indicated by arrow 101. Driving in this manner produces an LPF effect. The amount of drive of the shift lens varies depending on the sensitivity of the shift lens to movement on the imaging surface, but as shown in FIG. 5(a), circular movement is achieved by driving the shift lens in a sinusoidal manner in both the X and Y directions. The trajectory of the focused light beam on the imaging surface then moves as indicated by arrow 101 in FIG. 4(a).

[0071] The LPF drive may be performed by either the vibration isolation mechanism 14 of the imaging device 1 or the lens drive means 13 of the lens device 2. Generally, LPF drive requires driving at a higher frequency than normal image stabilization operation, and therefore consumes more power. Therefore, if image stabilization and LPF drive are performed simultaneously, there is a possibility that insufficient correction will occur due to insufficient power. Therefore, a known method is to compare the power consumption of the vibration isolation mechanism 14 and the power consumption of the lens drive means 13, and drive the LPF at the lower power consumption during high-frequency drive.

[0072] On the other hand, as mentioned above, LPF drive requires high-frequency drive with a cycle that is sufficiently short compared to the exposure time. In this case, if the LPF drive method is determined solely from the perspective of power consumption, there is a possibility that a sufficient LPF effect will not be obtained. In other words, when the exposure time is short, it is necessary to select a drive method that has good responsiveness during high-frequency drive (high-frequency drive characteristics).

[0073] Therefore, in this embodiment, when determining the driving method for performing LPF driving, if the exposure time is shorter than a predetermined time, a driving method with good high frequency driving characteristics is selected. A specific example will be described below with reference to FIG.

[0074] FIG. 6 is a flowchart showing processing (LPF driving during still image shooting) in this embodiment. The imaging device 1 of this embodiment has an LPF setting in the menu that can be switched by a user operation. When the LPF setting is ON, the LPF effect can be obtained by the LPF driving of the image stabilization means described above. On the other hand, when the LPF mode is OFF, LPF driving by the image stabilization means is not performed, and shooting is performed without the LPF effect. The user can switch the LPF setting ON / OFF on the menu screen displayed on the display means 9. The flow in FIG. 6 starts when the imaging device 1 is powered ON.

[0075] First, in step S101, the camera system control circuit 5 determines whether or not it has detected that the user has pressed the release button halfway, using the operation detection unit 10. If it is determined that a halfway press of the release button has been detected, the process proceeds to step S102. On the other hand, if it is determined that a halfway press of the release button has not been detected, step S101 is repeated until a halfway press of the release button is detected.

[0076] In step S102, the camera system control circuit 5 determines whether the LPF setting is ON. If it is determined that the LPF setting is ON, the process proceeds to step S103. On the other hand, if it is determined that the LPF setting is OFF, the process proceeds to step S107.

[0077] In step S103, the camera system control circuit 5 acquires the characteristics of the lens driving means 13 of the lens device 2 attached to the imaging device 1. The characteristics acquired here include the driving characteristics for high frequency driving and the power consumption during high frequency driving, but are not limited to these as long as they are characteristics of the lens device 2.

[0078] Next, in step S104, the camera system control circuit 5 determines whether the exposure time is shorter than a predetermined threshold (predetermined time). If it is determined that the exposure time is shorter than the threshold, the process proceeds to step S105. On the other hand, if it is determined that the exposure time is not shorter than the threshold, the process proceeds to step S106.

[0079] In step S105, the camera system control circuit 5 compares the high frequency drive characteristics of the vibration isolation mechanism 14 and the lens drive means 13, and selects the moving member to be LPF driven (LPF drive member, shake correction means).

[0080] In step S106, the camera system control circuit 5 compares the power consumption of the vibration isolation mechanism 14 and the lens driving means 13 during high frequency driving, and selects the moving member to be LPF driven (LPF driving member, blur correction means).

[0081] In step S107, the camera system control circuit 5 determines whether a full press of the release button has been detected and a command to expose a still image has been issued. If it is determined that a full press of the release button has been detected, the process proceeds to step S108. On the other hand, if it is determined that a full press of the release button has not been detected, step S107 is repeated until a full press of the release button is detected.

[0082] In step S108, the camera system control circuit 5 drives the shutter mechanism 16 and performs exposure for still image capture using the image sensor 6. When performing exposure for still image capture, the camera system control circuit 5 references information stored in the drive characteristics storage unit within the camera system control circuit 5 and performs LPF drive of the drive member selected in step S105 or step S106 at a drive frequency corresponding to the exposure time for still image capture. This makes it possible to prevent degradation of image quality due to moire and false colors for subjects with high spatial frequency areas, even if an LPF is not installed.

[0083] Next, in step S109, the camera system control circuit 5 determines whether or not the power has been turned off by the operation detection unit 10. If it is determined that the power has been turned off, this flow ends. On the other hand, if it is determined that the power has not been turned off, the process returns to step S101.

[0084] As described above, in this embodiment, the camera system control circuit 5 selects whether to use the first or second low-pass filter operation image stabilization means or the second low-pass filter operation image stabilization means depending on the exposure time. If the exposure time is shorter than a predetermined time (if the shutter speed is faster than a predetermined speed), the image stabilization means with better high-frequency drive characteristics is selected. On the other hand, if the exposure time is longer than a predetermined time (if the shutter speed is slower than a predetermined speed), the image stabilization means with lower power consumption during high-frequency drive is selected. This allows for a suitable low-pass filter effect to be obtained even if the exposure time is short (even if the shutter speed is fast) while suppressing power consumption. [Example]

[0085] Next, a third embodiment of the present invention will be described with reference to Fig. 7. The basic configuration of the imaging system of this embodiment is the same as that of the imaging system 100 described in the first embodiment with reference to Figs. 1(a) and (b), and therefore the description thereof will be omitted.

[0086] Power for the lens device 2 is supplied via the imaging device 1. For this reason, the driving section within the lens device 2 generally has a lower current limit during driving than the imaging device 1. Therefore, even if the power consumption of the lens driving means 13 is lower in the LPF drive mode, it may be preferable to drive the image stabilization mechanism 14 of the imaging device 1 in the LPF drive mode from the perspective of current limiting.

[0087] Therefore, in this embodiment, when the exposure time is longer than a predetermined time, the power limitations of the lens device 2 and the imaging device 1 and the power consumption of the lens driving means 13 and the vibration isolation mechanism 14 are compared to determine the driving method for performing LPF driving. A specific example will be described below with reference to FIG. 7. FIG. 7 is a flowchart showing the processing (LPF driving) in this embodiment. Note that FIG. 7 differs from FIG. 6 (Embodiment 2) in that step S206 is included instead of step S106 in FIG. 6. The other steps are the same as in FIG. 6, and therefore their description will be omitted.

[0088] In step S206, the camera system control circuit 5 compares the power limits when driving the lens device 2 and the image capture device 1. The camera system control circuit 5 also compares the power consumption when driving the vibration isolation mechanism 14 and the lens driving means 13 at high frequency. Based on the results of these comparisons, the camera system control circuit 5 then selects the moving member to be LPF driven (the vibration isolation mechanism 14 or the lens driving means 13).

[0089] According to this embodiment, even if a low-pass filter is not installed, it is possible to prevent degradation of image quality due to moire and false colors for subjects having high spatial frequency portions. Furthermore, according to this embodiment, an appropriate low-pass filter effect can be obtained even if the exposure time is short (even if the shutter speed is fast) depending on the limit value of the drive current. [Example]

[0090] Next, a fourth embodiment of the present invention will be described with reference to Fig. 8. The basic configuration of the imaging system of this embodiment is the same as that of the imaging system 100 described in the first embodiment with reference to Figs. 1(a) and 1(b), and therefore the description thereof will be omitted.

[0091] There are various types of vibration isolation mechanisms, and the strength of the magnetic field noise generated by the vibration isolation mechanism, including the actuator, varies depending on the type, layout, and drive mode of the drive actuator. Note that magnetic field noise refers to the magnetic field emitted from the magnetic circuit of the vibration isolation mechanism, and when this magnetic field reaches the image sensor 6, it generates image noise captured by the image sensor 6. In this embodiment, the strength of the magnetic field noise refers to the strength of the magnetic field reaching the surface (imaging surface) of the image sensor 6. Note that the magnetic field noise reaching the image sensor 6 is inversely proportional to the distance from the image sensor 6 to the magnetic circuit, which is the source of the magnetic field. Even if a magnetic field of the same strength is generated, the magnetic field noise reaching the image sensor 6 will be stronger if the distance is shorter.

[0092] Therefore, if the lens driving means 13 and the vibration isolation mechanism 14 generate magnetic field noise of the same intensity during LPF driving, the magnetic field noise generated by the vibration isolation mechanism 14, which is closer to the imaging element 6, will be stronger.

[0093] Therefore, in this embodiment, if the exposure time is not shorter than a predetermined time, and the strength of the magnetic fields generated by the lens driving means 13 and the vibration isolation mechanism 14 in the LPF drive mode are similar, the lens driving means 13 located farthest from the image sensor 6 is selected to be in the LPF drive mode. A specific example will be described below with reference to FIG. 8. FIG. 8 is a flowchart showing the processing (LPF drive) in this embodiment. Note that FIG. 8 differs from FIG. 6 (Embodiment 2) in that step S306 is included instead of step S106 in FIG. 6. The other steps are the same as those in FIG. 6, and therefore their description will be omitted.

[0094] In step S306, the camera system control circuit 5 compares the strength of the magnetic field generated during LPF driving of the vibration isolation mechanism 14 and the lens driving means 13, and selects the moving member to be LPF driven (vibration isolation mechanism 14 or lens driving means 13).

[0095] According to this embodiment, even if an LPF is not installed, it is possible to prevent degradation of image quality due to moire and false colors for subjects having high spatial frequency portions. Furthermore, according to this embodiment, it is possible to obtain an appropriate low-pass filter effect even if the exposure time is short (even if the shutter speed is fast) depending on the magnetic field noise generated during low-pass filter operation.

[0096] As described above, in each embodiment, selection unit 5b selects whether to use the first or second image blur correction unit to perform a specific operation, depending on the exposure time (shutter speed). For example, vibration isolation mechanism 14 includes at least one of the first or second image blur correction unit, and lens driving unit 13 includes at least one of the first or second image blur correction unit.

[0097] Preferably, the specific operation includes a first operation and a second operation. The control means 5a performs a first operation using one of the first shake correction means and the second shake correction means, and performs a second operation different from the first operation using the other of the first shake correction means and the second shake correction means. More preferably, the first operation is a shake correction operation, and the second operation is an operation different from the shake correction operation. Also preferably, the first shake correction means corrects low-frequency shake signals, and the second shake correction means corrects shake signals with higher frequencies than the first shake correction means. Also preferably, the second shake correction means has a shorter stroke than the first shake correction means and can be driven at a higher frequency than the first shake correction means.

[0098] Preferably, the second operation is a super-resolution operation. More preferably, when the exposure time is shorter than a predetermined time, the selection unit 5b performs the super-resolution operation using the first image stabilization unit and the image stabilization operation using the second image stabilization unit. On the other hand, when the exposure time is longer than the predetermined time, the selection unit 5b performs the image stabilization operation using the first image stabilization unit and the super-resolution operation using the second image stabilization unit.

[0099] Preferably, the specific operation includes a low-pass filter operation. When the exposure time is shorter than a predetermined time, the selection unit 5b selects whether to use the first image stabilization unit or the second image stabilization unit for low-pass filter operation in accordance with responsiveness during high-frequency driving. More preferably, when the exposure time is longer than a predetermined time, the selection unit 5b selects whether to use the first image stabilization unit or the second image stabilization unit for low-pass filter operation in accordance with power consumption during high-frequency driving. Also preferably, when the exposure time is longer than a predetermined time, the selection unit 5b selects whether to use the first image stabilization unit or the second image stabilization unit for low-pass filter operation in accordance with a limit value of the drive current. Also preferably, when the exposure time is longer than a predetermined time, the selection unit 5b selects whether to use the first image stabilization unit or the second image stabilization unit for low-pass filter operation in accordance with magnetic field noise generated during low-pass filter operation.

[0100] In the second to fourth embodiments, the selection unit 5b selects whether to use the first or second image stabilization unit to perform low-pass filtering depending on the exposure time, but this is not limited to this. The selection unit 5b may also switch whether to use the first or second image stabilization unit to perform image stabilization or low-pass filtering depending on the exposure time. For example, when the exposure time is shorter than a predetermined time, the selection unit 5b may use the first image stabilization unit to perform low-pass filtering and the second image stabilization unit to perform image stabilization. On the other hand, when the exposure time is longer than the predetermined time, the selection unit 5b may use the first image stabilization unit to perform image stabilization and the second image stabilization unit to perform low-pass filtering.

[0101] In each embodiment, the predetermined time that serves as the basis for switching between the first and second image stabilization means may differ depending on at least one of the focal length, F-number, or ISO sensitivity. By taking the focal length, F-number, or ISO sensitivity into consideration, more appropriate processing becomes possible.

[0102] In each embodiment, the predetermined time may be changeable according to the user's settings. By adapting to the user's preferences, it becomes possible to provide appropriate processing for each user.

[0103] (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.

[0104] According to each embodiment, it is possible to provide a control device, an imaging device, a control method, and a program that are capable of more appropriately performing a specific operation.

[0105] The disclosure of each embodiment includes the following configurations and methods. (Configuration 1) a control means for controlling the first motion compensation means and the second motion compensation means; and a selection unit that selects whether to use the first image blur correction unit or the second image blur correction unit to perform a specific operation depending on the exposure time. (Configuration 2) the specific operation includes a first operation and a second operation; The control means performing a first operation using one of the first image stabilization means and the second image stabilization means; The control device according to configuration 1, characterized in that a second operation different from the first operation is performed using the other of the first vibration reduction means and the second vibration reduction means. (Configuration 3) the first operation is a shake correction operation, 3. The control device according to configuration 2, wherein the second operation is an operation different from the shake correction operation. (Configuration 4) the first shake correction means corrects a low-frequency shake signal; 4. The control device according to configuration 2 or 3, wherein the second vibration reduction means corrects vibration signals having a higher frequency than the first vibration reduction means. (Configuration 5) 5. The control device according to any one of configurations 2 to 4, wherein the second vibration reduction means has a shorter stroke than the first vibration reduction means and is drivable at a higher frequency than the first vibration reduction means. (Configuration 6) 6. The control device according to any one of configurations 3 to 5, wherein the second operation is a super-resolution operation. (Configuration 7) The selection means When the exposure time is shorter than a predetermined time, the super-resolution operation is performed using the first image blur correction means, and the image blur correction operation is performed using the second image blur correction means; The control device according to configuration 6, wherein, when the exposure time is longer than the predetermined time, the first image stabilization means is used to perform the image stabilization operation, and the second image stabilization means is used to perform the super-resolution operation. (Configuration 8) 6. The control device according to any one of configurations 3 to 5, wherein the second operation is a low-pass filter operation. (Configuration 9) The selection means When the exposure time is shorter than a predetermined time, the low-pass filter operation is performed using the first image blur correction means, and the image blur correction operation is performed using the second image blur correction means; 9. The control device according to configuration 8, wherein, when the exposure time is longer than the predetermined time, the first image blur correction means is used to perform the image blur correction operation, and the second image blur correction means is used to perform the low-pass filter operation. (Configuration 10) the specific operation includes a low-pass filter operation; The control device according to configuration 2, wherein the selection means selects whether to use the first image blur correction means or the second image blur correction means to perform the low-pass filter operation, depending on responsiveness during high-frequency driving, when the exposure time is shorter than a predetermined time. (Configuration 11) The control device according to configuration 10, wherein the selection means selects whether to use the first image blur correction means or the second image blur correction means to perform the low-pass filter operation, depending on power consumption during the high-frequency driving, when the exposure time is longer than the predetermined time. (Configuration 12) 12. The control device according to configuration 10 or 11, wherein when the exposure time is longer than the predetermined time, the selection means selects whether to use the first image blur correction means or the second image blur correction means to perform the low-pass filter operation, depending on a limit value of a drive current. (Configuration 13) The control device according to configuration 10, wherein the selection means selects whether to use the first image stabilization means or the second image stabilization means to perform the low-pass filter operation, depending on magnetic field noise generated during the low-pass filter operation, when the exposure time is longer than the predetermined time. (Configuration 14) The control device according to any one of configurations 7, 9 to 13, wherein the predetermined time period differs depending on the focal length. (Configuration 15) The control device according to any one of configurations 7, 9 to 14, wherein the predetermined time period differs depending on at least one of an F-number and an ISO sensitivity. (Configuration 16) 16. The control device according to any one of configurations 7 and 9 to 15, wherein the predetermined time period can be changed according to a user setting. (Configuration 17) one or two first image blur correction means are provided, 17. The control device according to any one of configurations 1 to 16, wherein one or two second shake correction means are provided. (Configuration 18) 18. An imaging device comprising the control device according to any one of configurations 1 to 17 and an imaging element. (Method 1) controlling the first motion compensation means and the second motion compensation means; and selecting whether to use the first image blur correction means or the second image blur correction means to perform a specific operation in accordance with an exposure time. (Configuration 19) A program that causes a computer to execute the control method described in Method 1.

[0106] 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]

[0107] 5. Camera system control circuit (control device) 5a Control Means 5b Selection Method 13 Lens driving means (first blur correction means, second blur correction means) 14 Anti-vibration mechanism (first vibration compensation means, second vibration compensation means)

Claims

1. a control unit that controls the first motion compensation unit and the second motion compensation unit; and a selection unit that selects whether to use the first image blur correction unit or the second image blur correction unit to perform a specific operation depending on the exposure time.

2. the specific operation includes a first operation and a second operation; The control means performing a first operation using one of the first image stabilization means and the second image stabilization means; 2. The control device according to claim 1, wherein the other of the first motion compensation means and the second motion compensation means is used to perform a second operation different from the first operation.

3. the first operation is a shake correction operation, 3. The control device according to claim 2, wherein the second operation is an operation different from the shake correction operation.

4. the first shake correction means corrects a low-frequency shake signal; 3. The control device according to claim 2, wherein the second vibration reduction means corrects vibration signals having a higher frequency than the first vibration reduction means.

5. 3. The control device according to claim 2, wherein the second motion compensation means has a shorter stroke than the first motion compensation means and can be driven at a higher frequency than the first motion compensation means.

6. The control device according to claim 3 , wherein the second operation is a super-resolution operation.

7. The selection means When the exposure time is shorter than a predetermined time, the super-resolution operation is performed using the first image blur correction means, and the image blur correction operation is performed using the second image blur correction means; 7. The control device according to claim 6, wherein, when the exposure time is longer than the predetermined time, the first image stabilization unit is used to perform the image stabilization operation, and the second image stabilization unit is used to perform the super-resolution operation.

8. 4. The control device according to claim 3, wherein the second operation is a low-pass filter operation.

9. The selection means When the exposure time is shorter than a predetermined time, the low-pass filter operation is performed using the first image blur correction means, and the image blur correction operation is performed using the second image blur correction means; 9. The control device according to claim 8, wherein when the exposure time is longer than the predetermined time, the first image stabilization unit performs the image stabilization operation, and the second image stabilization unit performs the low-pass filter operation.

10. the specific operation includes a low-pass filter operation; 3. The control device according to claim 2, wherein when the exposure time is shorter than a predetermined time, the selection unit selects whether to use the first image blur correction unit or the second image blur correction unit to perform the low-pass filter operation, depending on responsiveness during high-frequency driving.

11. 11. The control device according to claim 10, wherein the selection unit selects whether to use the first image blur correction unit or the second image blur correction unit to perform the low-pass filter operation, depending on power consumption during the high-frequency driving, when the exposure time is longer than the predetermined time.

12. 11. The control device according to claim 10, wherein the selection unit selects whether to use the first image blur correction unit or the second image blur correction unit to perform the low-pass filter operation, depending on a limit value of a drive current, when the exposure time is longer than the predetermined time.

13. 11. The control device according to claim 10, wherein the selection unit selects whether to use the first image blur correction unit or the second image blur correction unit to perform the low-pass filter operation, depending on magnetic field noise generated during the low-pass filter operation, when the exposure time is longer than the predetermined time.

14. The control device according to claim 7 , wherein the predetermined time period varies depending on the focal length.

15. 8. The control device according to claim 7, wherein the predetermined time period varies depending on at least one of an F-number and an ISO sensitivity.

16. 8. The control device according to claim 7, wherein the predetermined time is changeable according to a user setting.

17. one or two first image blur correction means are provided, 17. The control device according to claim 1, wherein one or two second vibration reduction means are provided.

18. An imaging device comprising: the control device according to claim 1; and an imaging element.

19. controlling the first motion compensation means and the second motion compensation means; and selecting whether to use the first image blur correction means or the second image blur correction means to perform a specific operation in accordance with an exposure time.

20. A program causing a computer to execute the control method according to claim 19.

Images