JP2012239134A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that is more convenient in photographing an image in a state where two imaging apparatuses are connected.SOLUTION: An electronic apparatus comprises: a recording device for recording an image captured by a first imaging apparatus in a storage medium; a detection unit; and a control unit. The detection unit detects that a second imaging apparatus attachable/detachable to/from the first imaging apparatus and capable of capturing video is mounted on the first imaging apparatus. The control unit causes video captured by the second imaging apparatus to be stored in the storage medium when the second imaging apparatus is mounted on the first imaging apparatus.

Description

  The present invention relates to an electronic device.

  2. Description of the Related Art Conventionally, an imaging device that captures a stereoscopic image or a panoramic image using two detachable imaging devices has been proposed.

JP-A-11-355624

  In the conventional imaging apparatus, it has not been proposed how to operate each imaging device when capturing a moving image in a state where two imaging devices are connected.

  In view of the above circumstances, an electronic device with higher convenience is provided when an image is taken with two imaging devices connected.

  One aspect of an electronic device illustrating the present invention includes a recording device that records an image captured by a first imaging device on a storage medium, a detection unit, and a control unit. The detection unit detects that a second imaging device that can be attached to and detached from the first imaging device and can capture a moving image is attached to the first imaging device. The control unit stores the moving image captured by the second imaging device in the storage medium when the second imaging device is attached to the first imaging device.

  Another aspect of the electronic device exemplifying the present invention includes a detection unit and a control unit. The detection unit detects that a second imaging device that is detachable from the first imaging device is attached to the first imaging device. The control unit adjusts a focal position when an image is captured by the first imaging device, using information on the subject acquired by the second imaging device when the second imaging device is attached to the first imaging device. To do.

  When taking an image with two imaging devices connected, it is possible to provide a more convenient electronic device.

It is a perspective view which shows the camera system of an example of this embodiment. It is a rear view which shows a main camera. It is a rear view which shows a sub camera. It is a back side perspective view showing a sub camera. It is a perspective view which shows the connection part provided in the sub camera. It is a top view which shows a mode that a mutual camera is rotated so that a mutual optical axis may cross | intersect. It is a right view which shows a mode that a mutual camera is rotated so that a mutual optical axis may be swung up and down. It is a front view which shows a mode that a clearance gap produces on the bottom face of a subcamera when it connects so that a mutual optical axis may be parallel. It is a principal part perspective view which shows other embodiment which was made to connect a connection part to a mutual camera, respectively. It is a block diagram which shows the structure of the main camera 11 and the sub camera 12 of a camera system. It is a block diagram which shows the structure of CPU. It is a flowchart which shows the operation | movement of illumination photography by a camera system. It is a flowchart which shows the operation | movement of AF control by a camera system. It is a figure which shows the drive direction according to the lens position of an imaging lens. It is a flowchart which shows an example of the moving image photography by a camera system. It is a figure which shows an example of the imaging timing with a main camera and a subcamera. It is a figure which shows an example of the imaging timing with a main camera and a subcamera. It is a flowchart which shows an example of the moving image photography by a camera system. It is a figure which shows an example of the imaging timing with a main camera and a subcamera.

  As shown in FIG. 1, a camera system 10 according to an embodiment of the present invention includes a main electronic camera (hereinafter referred to as “main camera”) 11 and a sub electronic camera (hereinafter referred to as “sub camera”). ) 12. The main camera 11 and the sub camera 12 can each shoot a still image or a moving image.

  The sub camera 12 has a connection portion 13 attached to the left side surface (minus Y side). The connection portion 13 is provided with a male connector 14 at the tip, and the male connector 14 is physically and electrically connected to a female connector 15 provided on the right side surface of the main camera 11. The sub camera 12 is detachably attached to the main camera 11 via the connection unit 13. In the present embodiment, the connection unit 13 physically holds the state in which the main camera 11 is connected to the sub camera 12, and the photographing operation is performed in this state.

  The main camera 11 is provided with a photographic lens 16, a stereo microphone 17, and an illumination window 18 on the front, and a release button 19 and a power switch 20 on the top. The stereo microphone 17 includes a right channel microphone (hereinafter referred to as “microphone”) 17a and a left channel microphone 17b.

  The stereo microphones 17 are respectively disposed on both sides of the photographing lens 16, and one microphone 17a is disposed at a position farther from the female connector 15 than the other microphone 17b. That is, the other microphone 17 b is arranged at a position near the female connector 15 and near the sub camera 12.

  The sub camera 12 is provided with a photographic lens 21, a stereo microphone 22, and an illumination window 23 on the front, and a release button 24 and a power switch 25 on the top. The stereo microphone 22 includes a right channel microphone 22a and a left channel microphone 22b.

  Stereo microphones 22a and 22b are arranged on both sides of the photographing lens 16, respectively. The microphone 22 a is disposed on the connection unit 13 side with the photographing lens 21 interposed therebetween, and the microphone 22 b is disposed at a position away from the connection unit 13.

  The stereo microphone 17 of the main camera 11 collects the sound of the object scene and is connected to a CPU 117 (described later) via an audio circuit (not shown). When the main camera 11 and the sub camera 12 are connected, sound can be collected using all of the four microphones 17a, 17b, 22a, and 22b to form a four-channel microphone.

  Further, when the main camera 11 and the sub camera 12 are connected, sound may be collected by the two microphones 17a and 22b arranged at positions away from the connection unit 13. In this case, if a speaker is provided in the vicinity of at least one of the microphones 17b and 22a close to the connection unit 13 and a sound having a phase opposite to that collected by the microphones 17b and 22a is output from the speaker, the photographing lenses 16 and 21 are provided. It is possible to cancel (cancel) the noise of the machine parts when driving the motor.

  The photographic lens 16 is composed of a plurality of lens groups including a zoom lens and a focus lens, and forms a subject image on an imaging surface of an imaging device described later. The lens position of the photographic lens 16 is adjusted in the direction of the optical axis 16a (X-axis direction) by a lens driving unit (not shown) of the main camera 11. The photographing lens 21 of the sub camera 12 also has a zoom lens and a focus lens, and may have the same configuration as the photographing lens 16 or may have a different group configuration and number of lenses.

  The illumination window 18 has an illumination device inside, pre-light emission is performed when performing illumination photography (illumination imaging), the subject brightness is obtained, the light emission amount at the time of illumination photography is calculated by the CPU 117, and the calculated light emission amount is obtained. Based on this light emission. A lighting device is also built in the back of the lighting window of the sub camera 12. This illuminating device may have the same configuration as the illuminating device of the main camera 11, and specifications such as a light source, a dimming range, a charging time, and a guide number may be different. When the sub camera 12 is connected, the illumination device of the main camera 11 performs illumination photography in cooperation with the illumination device of the sub camera 12. Note that a xenon lamp or an LED may be used as the light source of the lighting device.

  The release button 24 of the sub camera 12 is used when the sub camera 12 is used alone. When the sub camera 12 is connected to the main camera 11, the sub camera 12 performs shooting in synchronization with or interlocking with the release button 19 on the main camera 11 side. For this reason, when the sub camera 12 is a dedicated camera that is always connected to the main camera 11 and used, the release button 24 may be omitted.

  As shown in FIG. 2, an LCD 26, a zoom lever 27, and a rotary multi selector 28 are provided on the back surface of the main camera 11. The LCD 26 is composed of a liquid crystal panel and displays an image, an operation menu screen, and the like. A transparent touch panel may be laminated on the surface of the LCD 26. In this case, the user can select the coordinates and the operation menu displayed corresponding to the coordinates by touching the touch panel while visually recognizing the operation menu of the LCD 26.

  The zoom lever 27 adjusts the zoom position of the taking lens 16 between the wide-angle end and the telephoto end. The rotary multi-selector 28 has an outer peripheral portion 28a, a rotating portion 28b, and an OK button 28c in the central portion. When selecting items and images displayed on the menu screen, the rotary multi selector 28 There are a method of pushing the part and the left and right parts, and a method of rotating the rotating part 28b. By pressing the OK button 28c, it becomes possible to confirm selection of the selected item or image.

  As shown in FIG. 3, an LCD 29 is provided on the back surface of the sub camera 12. On the LCD 29, a through image, a reproduced image, a menu screen, and the like are displayed.

  The LCD 29 is provided with a transparent touch panel, and when the photographer touches the touch panel while visually checking the operation menu of the LCD 29, the coordinates and the operation menu displayed corresponding to the coordinates are displayed. Is to select.

  As shown in FIG. 4, the LCD plate 30 incorporating the LCD 29 is provided so as to be openable and closable with respect to the camera body 32 by a hinge 31. The camera main body 32 is provided with an accommodating portion 33 for accommodating the connecting portion 13 on an inner surface 32 a that is visually recognized by opening the LCD plate 30.

  The connection unit 13 is rotatable with respect to the camera body 32 and has a first axis 34 along the Z-axis direction and a second axis 35 along the Y-axis direction. The connecting portion 13 is housed in the housing portion 33 by rotating around the first shaft 34. As shown in FIG. 5, the first axis 34 is a vertical axis perpendicular to the optical axis 21 a (X axis) of the photographing lens 21 from the vertical direction, and when the state connected to the main camera 11 is viewed from a plane. As shown in FIG. 6, the sub camera 12 is rotated in a direction in which the optical axis 21 a intersects the optical axis 16 a of the photographing lens 16 of the main camera 11. The first axis 34 may be an axis shifted from the vertical. In this case, the optical axes 16a and 21a are rotated so as to intersect in a plane inclined with respect to the horizontal plane.

  The second axis 35 is a horizontal axis orthogonal to the optical axis 21a from the horizontal direction. When the state connected to the main camera 11 is viewed from the right side, as shown in FIG. 7, the optical axis 21a is the optical axis. The sub camera 12 is rotated so as to turn with respect to 16a. As described above, the connection unit 3 includes the first shaft 34 that relatively opens and closes the main camera 11 and the sub camera 12 in the horizontal direction, and the second shaft that relatively swings the main camera 11 and the sub camera 12 in the vertical direction. It has a two-degree-of-freedom two-axis hinge composed of a shaft 35. It should be noted that this biaxial hinge and ball joint may be combined so that the attitude of the sub camera 12 relative to the main camera 11 can be adjusted with two or more degrees of freedom.

  The first and second shafts 34 and 35 are configured to have a click feeling at every predetermined rotation angle. The directions (postures) of the main camera 11 and the sub camera 12 can be easily finely adjusted because the axes 34 and 35 stop at a place where there is a click feeling. In the main camera 11 and the sub camera 12, the rotation positions of the axes 34 and 35 where the optical axis 16a and the optical axis 21a are parallel are in the initial position. Even at the initial position, a click feeling can be obtained for each of the axes 34 and 35. A detector for detecting the rotational position may be provided for each of the shafts 34 and 35. Information on the rotational positions of the axes 34 and 35 obtained from the detection unit is transmitted to the main camera 11 or the sub camera 12, and parameters for performing various types of shooting, for example, the light of the cameras 11 and 12 of each other during stereo shooting. This is used as a parameter when recognizing whether the axes 16a and 21a intersect or are parallel. In the present embodiment, the optical axes 16a and 21a are set in parallel during 3D photography and high dynamic photography described later, and the optical axes 16a and 21a are crossed during panoramic photography. Do.

  By the way, when the main camera 11 and the sub camera 12 are connected, when the sub camera 12 is rotated (turned) in the X-axis direction with respect to the main camera 11, the bottom surface of the sub camera 12 is not buffered with the table or the like. Therefore, as shown in FIG. 8, it is preferable to create a gap A between the bottom surface of the sub camera 12 and the table. At this time, the connecting portion 13 is provided so that the optical axes 16a and 21a are at the same height. The sub camera 12 is lower in height (dimension in the Z-axis direction) than the main camera 11. The mounting position of the connecting portion 13 with respect to the sub camera 12 with respect to the main camera 11 and the position of the female connector 15 of the main camera 11 are the same height position (the positions in the Z-axis direction are the same). The heights are determined so that the gap A is formed. It is desirable that the gap A be formed even if the optical axes 16a and 21a are connected with a shift in the height direction.

  The main camera 11 is heavier than the sub camera 12 and has a deep insertion stroke of the male connector 14 so that the connection portion 13 connected to the female connector 15 and the sub camera 12 can be supported in a cantilever manner. Therefore, the female connector 15 has a strong coupling force.

  In general, a camera has a heavy photographic lens, and therefore there is often a center of gravity position in a space of a lens barrel that holds the photographic lens. Therefore, the attachment position of the connecting portion 13 and the height position (position in the Z-axis direction) of the female connector 15 are the same as the optical axis 16a and the optical axis when the main camera 11 and the sub camera 12 are connected in the initial position. It is preferable to provide on a straight line L extending in the Y-axis direction so as to be connected to 21a. When the center of gravity is deviated from the optical axis, the attachment position of the connecting portion 13 and the height position of the female connector 15 are provided on a straight line passing through the positions of the center of gravity of the main camera 11 and the sub camera 12. Just do it.

  By determining the dimensions and weight of the main camera 11 and the sub camera 12 so that the position of the center of gravity, which is the center of weight when connected by the connection unit 13, is within the main camera 11, the main camera 11 and the sub camera 12 are connected. Stability when connected can be ensured.

  By the way, in the said embodiment, although the connection part 13 is attached to the sub camera 12, conversely, the connection part 13 may be attached to the main camera 11 and configured to be detachably connected to the sub camera 12. Good. In this case, an accommodation portion for accommodating the connection portion may be provided on the back surface of the main camera 11.

  Further, a part of the connecting portion 13 including one of the first shaft 34 and the second shaft 35 is provided separately in the main camera 11, and the other portion of the connecting portion 13 including the other shaft is provided separately in the sub camera 12. Also good. In this case, the accommodation unit 33 may be provided in each of the main camera 11 and the sub camera 12.

  The housing portion 33 is provided at a position over the region where the photographing lens 21 is disposed when the sub camera 12 is viewed from the back. It should be noted that the same configuration can be adopted when the housing portion 33 is provided in the main camera 11. In this case, it is desirable that the accommodating portion 33 be provided at a position that does not cover the area where the photographing lens 16 is disposed when the main camera 11 is viewed from the back.

  Further, as shown in FIG. 9, a connection unit 36 may be connected to the main camera 11 and the sub camera 12, respectively. In this case, the male connectors 14 and 37 may be provided at both ends of the connection portion 36, and the female connector 38 to which the male connector 37 is connected to the sub camera 12 may be provided. Also in this case, the connecting portion 36 has first and second shafts 39 and 40. The second shaft 40 is divided into upper and lower parts. The upper second axis 40 a is an axis that rotates the main camera 11 relative to the first axis 39, and the lower second axis 40 b is an axis that rotates the sub camera 12 relative to the first axis 39.

  The photographic lens 21 of the main camera 11 may have the same configuration as that of the photographic lens 16 of the sub-camera 12, but by using different types of lenses (single focus lens, telephoto lens, wide-angle lens), the camera system The variation of shooting at 10 can be expanded. The sub camera 12 corresponding to various lenses may be prepared, and the photographing lens 21 may be exchanged.

  In each of the above embodiments, the connection portion 13 has the first and second axes 34 and 35. However, a third axis of rotation that is parallel to the optical axis is provided, and the third axis is the center. The cameras 11 and 12 may be rotated relative to each other, or an axis or mechanism for relatively shifting the cameras 11 and 12 in the height direction may be provided.

  In each of the above embodiments, the camera system that connects the digital cameras 11 and 12 using the connection unit 13 is described. However, the present invention is not limited to this, and a mobile phone, a smartphone, a PDA (personal digital assistant), and the like. Needless to say, the present embodiment can also be applied to an electronic device system for connecting electronic devices with television cameras.

  Next, the configuration of the main camera 11 and the sub camera 12 of the camera system 10 will be described with reference to the block diagram shown in FIG. Note that the main camera 11 and the sub camera 12 of the present embodiment have, for example, a panorama mode that generates a panoramic image, a main camera, as well as a still image mode and a moving image mode that have a single shooting mode and a continuous shooting mode as shooting modes. 11 and the sub camera 12 have a 3D mode for generating a stereoscopic image when the sub camera 12 is connected.

  The main camera 11 includes a photographing lens 16, microphones 17a and 17b, an image sensor 110, an AFE 111, a buffer memory 112, an LCD 26, an operation member 113, a recording interface (I / F) 114, an image processing unit 116, a CPU 117, a power circuit 118, The lighting device 120 includes a bus. The microphones 17a and 17b, the buffer memory 112, the LCD 26, the operation member 113, the recording I / F 114, the image processing unit 116, the CPU 117, the power supply circuit 118, and the lighting device 120 are connected to each other via a bus so as to be able to transmit information.

  In addition, as shown in FIG. 1, when the male connector 14 of the connection portion 13 of the sub camera 12 is inserted into the female connector 15, the main camera 11 is electrically connected to the I / Fs 221 a to 221 d that are interfaces of the sub camera 12. And I / Fs 121a to 121d for inputting / outputting control signals and image data.

  The image sensor 110 is a device that captures an image of an object scene formed by a light beam that has passed through the photographing lens 16. The output of the image sensor 110 is input to the AFE 111. Note that the image sensor 110 of the present embodiment may be a progressive scan type solid-state image sensor (CCD or the like) or an XY address type solid-state image sensor (CMOS or the like). The size of the image sensor 110 is 35 mm full size, APS size, or the like.

  A plurality of light receiving elements are arranged in a matrix on the light receiving surface of the image sensor 110. In each light receiving element of the image sensor 110, red (R), green (G), and blue (B) color filters are arranged according to a known Bayer array. Therefore, each light receiving element of the image sensor 110 outputs an image signal corresponding to each color by color separation with a color filter. Thereby, the image sensor 110 can acquire a color image.

  Here, in the shooting mode of the main camera 11, the image sensor 110 captures a recorded image (main image) in response to a full press operation of the release button 19 constituting the operation member 113. When connected to the sub camera 12, the image sensor 110 may capture the main image in response to a full pressing operation of the release button 24 of the sub camera 12. Further, the imaging element 110 in the imaging mode captures a low-resolution image (through image) for composition confirmation at a predetermined time interval (for example, 30 fps) during imaging standby. The through image data is output from the image sensor 110 by thinning out readout. The through image data is used for image display on the LCD 26, various arithmetic processes by the CPU 117, and the like.

  The AFE 111 is an analog front end circuit that performs analog signal processing on the output of the image sensor 110. The AFE 111 performs correlated double sampling, image signal gain adjustment, and image signal A / D conversion. The output of the AFE 111 is connected to the buffer memory 112 via a bus. In the present embodiment, the imaging device 110 and the AFE 111 are provided as the imaging unit.

  The buffer memory 112 temporarily stores image data picked up by the image pickup device 110 of the main camera 11 and the image pickup device 210 of the sub camera 12 or is used as a work memory of the CPU 117. Further, the buffer memory 112 temporarily stores image data in the pre-process and post-process of image processing by the image processing unit 116. As the buffer memory 112, a volatile semiconductor memory or the like can be appropriately selected and used.

  The operation member 113 includes a release button 19, a power switch 20, a zoom lever 27, a rotary multi selector 28, and the like.

  A connector for connecting the storage medium 115 is formed in the recording I / F 114. Then, the recording I / F 114 executes data writing / reading with respect to the storage medium 115 connected to the connector. The storage medium 115 includes a hard disk, a memory card incorporating a semiconductor memory, or the like. In FIG. 10, a memory card is shown as an example of the storage medium 115.

  The image processing unit 116 performs various types of image processing (for example, color interpolation processing, gradation conversion processing, edge enhancement processing, white balance adjustment processing, image compression processing, image expansion processing, etc.) on the digital image signal output from the AFE 111. ). In addition, when the shooting mode is the panorama mode, the image processing unit 116 according to the present embodiment performs an image composition process for generating a panorama image by connecting sequentially captured main images using a known panorama composition method. . Note that panorama synthesis is disclosed in, for example, Japanese Patent No. 4269558 (US Published Patent No. 20050158858).

As shown in FIGS. 5 to 7, the connection unit 13 of the present embodiment includes a first shaft 34 that opens and closes the main camera 11 and the sub camera 12 in the horizontal direction, and the main camera 11 and the sub camera 12. It has a two-degree-of-freedom two-axis hinge including a second axis 35 that relatively shakes the camera 12 in the vertical direction. For this reason, in the panorama mode of this embodiment, in addition to acquiring a panoramic image extending in the horizontal direction, it is also possible to acquire a panoramic image extending in the vertical direction.
Further, when the image processing unit 116 is connected to the sub camera 12 and the shooting mode is set to the moving image mode or the like, the image processing unit 116 inputs a RAW image captured by the sub camera 12 via the I / Fs 221a and 121a, and Image processing may be performed. The image processing unit 116 is preferably an ASIC (Application Specific Integrated Circuit) that connects the above-described various image processing circuits in series and performs high-speed image processing by a pipeline method.

  The CPU 117 is a processor that comprehensively controls the operation of the main camera 11. The CPU 117 executes focus control for detecting the in-focus position of the photographic lens 16 by well-known autofocus (AF) control using a phase difference detection method or a contrast detection method based on, for example, through image data, by executing a control program. The unit 117a operates as an exposure calculation unit 117b that performs automatic exposure (AE) calculation, and an AWB calculation unit 117c that performs automatic white balance (AWB) calculation (FIG. 11a). In addition, the CPU 117 performs a setting screen for the LCD 26, display processing of a captured main image and a through image, and the like. Further, the CPU 117 according to the present embodiment controls the camera system 10 to which the main camera 11 and the sub camera 12 are connected in cooperation with the CPU 217 of the sub camera 12 as described later. The CPU 117 also has a clocking function that clocks time based on the clock signal.

  The power supply circuit 118 supplies the power of the battery 119 to each part in the main camera 11 in accordance with an instruction from the CPU 117. At the same time, the power supply circuit 118 detects the voltage of the battery 119 and outputs the detected voltage to the CPU 117 as remaining battery capacity information. When connected to the sub camera 12, the power supply circuit 118 may supply power to the sub camera 12 via the I / Fs 121d and 221d based on the control of the CPU 117.

  The illumination device 120 performs a cooperative operation of emitting a light source during imaging under the control of the CPU 117, and illuminates a main subject such as a person in the field through the illumination window 18. As the light source of the lighting device 120, a xenon lamp, a light emitting diode (LED), or the like can be appropriately selected and used. Note that the illumination device 120 performs an illumination operation in cooperation with the illumination device 220 of the sub camera 12 when the sub camera 12 is connected.

  The I / F 121a that is the interface of the main camera 11 inputs RAW image data before being subjected to image processing by the image processing unit 216, which is captured by the sub camera 12, via the I / F 221a of the sub camera 12. RAW image data before being imaged by the main camera 11 and subjected to image processing by the image processing unit 116 is output. Thereby, for example, the RAW image captured by the main camera 11 can be processed by the two image processing units 116 and 216, and the continuous shooting speed and the frame rate of the moving image can be increased.

  The I / F 121b, which is an interface of the main camera 11, inputs image data captured by the image sensor 210 of the sub camera 12 and processed by the image processing unit 216 via the I / F 221b of the sub camera 12.

  The I / F 121c that is the interface of the main camera 11 can communicate with the CPU 117 and the CPU 217 of the sub camera 12 via the I / F 221c of the sub camera 12, and inputs various information of the sub camera 12 from the CPU 217. The control signal is output to the CPU 217. Here, the various types of information of the sub camera 12 are information on the photographing lens 21, the image sensor 210, the illumination device 220, and the like, and the CPU 117 controls the sub camera 12 based on such information.

  The I / F 121d that is an interface of the main camera 11 supplies the power of the battery 119 to the sub camera 12 or the power of the battery 219 to the main camera 11 based on the control of the CPU 117 via the I / F 221d of the sub camera 12. To do. Note that the power supply to the main camera 11 and the sub camera 12 can be omitted if it is not necessary.

  On the other hand, the sub camera 12 includes a photographing lens 21, microphones 22a and 22b, an image sensor 210, an AFE 211, a buffer memory 212, an LCD 29, an operation member 213, a recording I / F 214, an image processing unit 216, a CPU 217, a power supply circuit 218, and an illumination device. 220, composed of a bus. The microphones 22a and 22b, the buffer memory 212, the LCD 29, the operation member 213, the recording I / F 214, the image processing unit 216, the CPU 217, the power supply circuit 218, and the lighting device 220 are connected via a bus so as to be able to transmit information.

  Further, as shown in FIG. 1, when the male connector 14 of the connecting portion 13 is inserted into the female connector 15 of the main camera 11, the sub camera 12 inputs / outputs control signals, image data, and the like with the main camera 11. / F221a-221d are provided.

  The image sensor 210 images the object scene formed by the light flux that has passed through the photographic lens 21, similarly to the image sensor 110 of the main camera 11. Note that the image sensor 210 of the sub camera 12 and the image sensor 110 of the main camera 11 may have the same size or different sizes.

  Similar to the AFE 211 of the main camera 11, the AFE 211 is an analog front-end circuit that performs analog signal processing on the output of the imaging device 210, and the imaging device 210 and the AFE 211 constitute an imaging unit of the sub camera 12.

  The buffer memory 212 temporarily stores image data picked up by the sub camera 12 and is used as a work memory for the CPU 217. Further, the buffer memory 212 temporarily stores image data in the pre-process and post-process of image processing by the image processing unit 216. As the buffer memory 212, a volatile semiconductor memory or the like can be appropriately selected and used in the same manner as the buffer memory 112 of the main camera 11.

  The operation member 213 includes a release button 24, a power switch 25, and the like.

  In the recording I / F 214, a connector for connecting the storage medium 215 is formed as in the case of the main camera 11. Then, the recording I / F 214 executes data writing / reading with respect to the storage medium 215 connected to the connector.

  Similar to the image processing unit 116 of the main camera 11, the image processing unit 216 performs various image processes on the digital image signal output from the AFE 211. Note that when the image processing unit 216 is connected to the main camera 11 and the shooting mode is set to the moving image mode or the like, the image processing unit 216 converts the RAW image captured by the main camera 11 to I based on the control instruction of the CPU 117 of the main camera 11. / F121a and 221a may be input to perform the various image processes. As with the image processing unit 116, the image processing unit 216 is preferably an ASIC that performs high-speed image processing of various types of image processing using a pipeline method.

  The CPU 217 is a processor that comprehensively controls the operation of the sub camera 12. Similar to the CPU 117 of the main camera 11, the CPU 217 executes a control program, and performs, for example, a focus detection unit 217 a that detects the in-focus position of the photographing lens 21 by AF control based on through-image data, and performs an AE calculation. It operates as an exposure calculation unit 217b that performs AWB calculation unit 217c that performs AWB calculation (FIG. 11b). In addition, the CPU 217 performs a setting screen for the LCD 29, display processing of a captured main image and a through image, and the like. Furthermore, when connected to the main camera 11, the CPU 217 of the present embodiment controls the operation of the sub camera 12 based on a control signal from the CPU 117.

  The power supply circuit 218 supplies the power of the battery 219 to each part in the sub camera 12 in accordance with an instruction from the CPU 217. At the same time, the power supply circuit 218 detects the voltage of the battery 219 and outputs the detected voltage to the CPU 217 as remaining battery capacity information. When connected to the main camera 11, the power supply circuit 218 may supply power to the main camera 11 via the I / Fs 221 d and 121 d based on a control instruction from the CPU 117 of the main camera 11.

  Similar to the illumination device 120 of the main camera 11, the illumination device 220 performs a cooperative operation of emitting a light source during imaging, and illuminates a main subject such as a person in the object field through the illumination window 23. As the light source of the illumination device 220, a xenon lamp, an LED, or the like can be appropriately selected and used, and may be the same as or different from the light source of the illumination device 120.

  Next, the operation of the camera system 10 will be described separately for A) illumination shooting, B) AF control, and C) movie shooting.

A) Illumination Shooting Operation Illumination shooting operation by the camera system 10 shown in FIG. 1 will be described with reference to the flowchart shown in FIG. In the following description, it is assumed that the illumination devices 120 and 220 operate as a flash device, and the camera system 10 performs flash photography as illumination photography. That is, the illumination devices 120 and 220 perform pre-light emission for obtaining the light emission amount of main light emission at the time of main image capturing based on the control of the CPU 117. The CPU 117 calculates the light emission amount of the main light emission based on the subject luminance by the pre-light emission, and the illumination devices 120 and 220 perform the main light emission based on the calculated light emission amount.

  The specification information such as the light source, dimming range, charging time, and guide number of the lighting devices 120 and 220 is stored in advance in a memory (not shown) of the main camera 11 and the sub camera 12 where each is arranged. To do.

  In the following, the shooting mode of the camera system 10 is set to the continuous shooting mode, for example, by the rotary multi selector 28, and the illumination shooting operation by the camera system 10 when the main camera 11 performs continuous shooting will be described. However, the same illumination shooting operation is performed when the sub camera 12 continuously shoots or when the main camera 11 or the sub camera 12 captures images in the single shooting mode.

  Based on the above, the CPU 117 turns on the main camera 11 and the sub camera 12 of the camera system 10 in response to a power-on instruction of one of the power switch 20 or the power switch 25 by the user. The main camera 11 and the sub camera 12 may be turned on when the main camera 11 and the sub camera 12 are connected via the connection unit 13. The CPU 117 initializes the main camera 11 and outputs a control signal for instructing the initialization of the sub camera 12 to the CPU 217 via the I / F 121a and 221a. CPU117 starts the process from step S101. For initialization of the main camera 11 and the sub camera 12, as an example, the zoom position and the focus position of the photographing lenses 16 and 21 are matched, or the aperture value and the shutter speed are matched, so that the main camera 11 and the sub camera 12 are matched. And matching the shooting conditions.

  Step S101: The CPU 117 reads specification information of the lighting device 120 from a memory (not shown) of the main camera 11. In addition, the CPU 117 causes the CPU 217 to read the specification information of the illumination device 220 from the memory (not shown) of the sub camera 12 and acquire it via the I / F 121c and 221c.

  Step S102: The CPU 117 causes the power supply circuit 118 to detect the voltage of the battery 119, and acquires the detected voltage as remaining battery capacity information. Further, the CPU 117 outputs a control signal for causing the power supply circuit 218 to detect the voltage of the battery 119 to the CPU 217. The CPU 217 outputs the detected voltage of the battery 219 as remaining battery capacity information to the CPU 117 via the I / F 121c and 221c. The CPU 117 acquires battery remaining amount information of the battery 219. Note that the CPU 117 is powered when the power circuit 118 of the main camera 11 supplies power to the sub camera 12 or when the power circuit 218 of the sub camera 12 supplies power to the main camera 11. The acquisition of the remaining capacity information of the battery may be omitted.

  Step S103: The CPU 117 performs a lighting operation in cooperation with the lighting devices 120 and 220 based on the specification information of the lighting devices 120 and 220 acquired in steps S101 and S102 and the remaining battery level information of the batteries 119 and 219. I do. That is, the CPU 117 sets one of the illumination devices 120 and 220 as a pre-flash device and the other as a main flash device.

  For example, the CPU 117 performs a setting for causing the lighting device of the camera having the battery with the smaller remaining amount to perform pre-light emission and causing the other lighting device to perform main light emission based on the remaining battery amount information of the batteries 119 and 219. Further, the CPU 117 may be set so that the lighting device with a long charging time causes the lighting device with a long charging time to perform pre-light emission and the lighting device with a short charging time to perform the main light emission based on the length of charging time of the lighting devices 120 and 220. Alternatively, when one battery is also supplying power to the other camera, the CPU 117 causes the illumination device of the camera that is supplied with power to pre-emit and the main illumination to the illumination device of the camera that is supplying power. Alternatively, the setting may be such that both the pre-light emission and the main light emission are performed by the illumination device of the camera that is supplying power.

  In the present embodiment, the CPU 117 performs settings for causing the lighting device 220 to perform pre-light emission and causing the lighting device 120 to perform main light emission. In addition, when the shooting mode is the continuous shooting mode, the CPU 117 may perform setting to increase the sensitivity of the imaging elements 110 and 210.

  Further, the CPU 117 may determine which illuminating device emits the main light with reference to the distance to the subject, the aperture value (F value), and the guide numbers of the illuminating devices 120 and 220. For example, when the guide number of the illumination device 120 is larger than the guide number of the illumination device 220 and the distance to the subject is far, the CPU 117 may perform the main light emission with the illumination device 120 having a large guide number.

  Step S104: The CPU 117 causes the illumination device 220 to pre-emit light based on the setting in step S103 in response to the imaging instruction for the full press operation of the release button 19 by the user. The CPU 117 calculates and sets the light emission amount of the lighting device 120 that performs the main light emission based on the pre-light emission.

  Step S105: The CPU 117 causes the illuminating device 120 to emit light with the light emission amount set in step S104, and causes the image sensor 110 to image the scene. The image processing unit 116 performs image processing on the captured image data and temporarily records it in the buffer memory 112. In the present embodiment, it is preferable that the CPUs 117 and 217 particularly have a list of correction values for the light sources of the illumination devices 120 and 220 in the AWB calculation processing of the AWB calculation units 117c and 217c.

  Step S106: The CPU 117 determines whether or not the shooting mode is the continuous shooting mode. In the single shooting mode (NO side), the CPU 117 causes the image processing unit 116 to perform image compression processing on the image data recorded in the buffer memory 112 and records the generated image file in the storage medium 115. The CPU 117 ends a series of processes.

  On the other hand, in the continuous shooting mode, the CPU 117 proceeds to step S103 (YES side). The CPU 117 performs steps S103 to S105 until the full pressing operation of the release button 19 by the user is released and an imaging end instruction is received.

In the continuous shooting mode, the CPU 117 preferably performs setting so that the illumination device 120 performs pre-light emission and the illumination device 220 performs main light emission in the next illumination shooting, for example. As a result, it is possible to shorten the time until the lighting device that has performed the main light emission is recharged, and it is possible to perform continuous shooting at a stable frame rate even if the continuous shooting speed is increased.
Further, when the lighting devices 120 and 220 have different light sources, images with different atmospheres can be taken by alternately performing main light emission. Note that the CPU 117 may skip the pre-flash step of step S104 when the AE lock is performed, for example, in the second and subsequent shootings in the continuous shooting mode, and when the AE lock is not performed. However, the pre-flash in step S104 may be thinned out.

As described above, the illumination devices 120 and 220 are operated in cooperation with each other based on the specification information of the illumination devices 120 and 220, the remaining battery level information of the batteries 119 and 219, etc., so that illumination imaging can be performed quickly and easily. It can be carried out.
《Additional items for lighting shooting operation》
(1) In the above-described illumination photographing operation, one illumination device is caused to perform pre-light emission and the other illumination device is caused to emit main light, but the present invention is not limited to this. For example, the pre-light emission is performed by one of the lighting devices, but the main light emission may be performed by both of the lighting devices 120 and 220. However, in this case, it is preferable that the CPU 117 adjusts and sets the light emission amounts of the lighting device 120 and the lighting device 220 so as to be different from each other. That is, the CPU 117 sets the light emission amount so as to illuminate a main subject located close to one illumination device, and sets the light emission amount so that the other illumination device illuminates a main subject located far away. preferable.

  (2) In the above-described illumination shooting operation, the shooting mode is set to the continuous shooting mode or the single shooting mode. However, the present invention is not limited to this, and can be applied to a moving image mode, a panorama mode, a 3D mode, and the like. In the case of the moving image mode or the like, it is preferable that any one of the light sources 120 and 220 is an LED or the like. As a result, the CPU 117 can cause the illumination device 120 or 220 to emit light continuously, and can illuminate the main subject during moving image shooting.

  (3) In the illumination shooting operation, when the shooting mode is set to the continuous shooting mode, the main camera 11 is continuously shot. However, the present invention is not limited to this, and the sub camera 12 may be continuously shot. The camera 11 and the sub-camera 12 may be alternately photographed for continuous shooting.

  (4) In the above-described illumination photographing operation, the illumination devices 120 and 220 are disposed in the main camera 11 and the sub camera 12, but the present invention is not limited to this, and an external illumination device connected via a hot shoe or the like. May be used.

B) AF Control Operation Next, the AF control operation by the camera system 10 shown in FIG. 1 will be described with reference to the flowchart shown in FIG. In the following description, it is assumed that the main camera 11 and the sub camera 12 image at least a part of the overlapping scene, and the CPU 117 sets the overlapping scene area as an AF area. Further, it is assumed that the main camera 11 and the sub camera 12 have different AF control methods, and are a phase difference detection method and a contrast detection method. Further, it is assumed that specification information such as the focal length and weight of each of the photographing lenses 16 and 21 and the driving performance of the motor of the lens driving unit is stored in advance in memories (not shown) of the main camera 11 and the sub camera 12. .

  Based on the above, the CPU 117 turns on the main camera 11 and the sub camera 12 of the camera system 10 in response to a power-on instruction for the operation of the power switch 20 or the power switch 25 by the user.

  Step S201: The CPU 117 acquires the specification information of the photographing lenses 16 and 21, and initializes the photographing lenses 16 and 21. For example, when the specifications of the photographic lenses 16 and 21 are the same, the zoom position of the photographic lenses 16 and 21 is set to the wide end, and the respective focus lenses are moved so as to be focused at a shooting distance of 2 m. Set the same aperture value. If the specifications of the photographic lenses 16 and 21 are different, the position on the wide side or the position of the focus lens may be set so that the settings of the photographic lenses 16 and 21 are the same. In addition, as initialization of the main camera 11 and the sub camera 12, the CPU 117 may match the sensitivities of the respective image sensors or adjust the shutter speed.

  Step S202: The CPU 117 acquires information on the AF control method of the main camera 11 and the sub camera 12. In the present embodiment, the main camera 11 is a phase difference AF, and the sub camera 12 is a contrast AF.

  Step S203: The CPU 117 cooperates the lens driving units (not shown) of the main camera 11 and the sub camera 12 based on the information acquired in Step S201 and Step S202 to determine the in-focus positions of the photographing lenses 16 and 21. Set to detect. That is, the CPU 117 determines and sets the driving direction of the photographing lenses 16 and 21 based on the specification information, particularly the driving speed.

  Specifically, the CPU 117 performs shooting when the driving speed of the focus lens of the shooting lens 16 is higher than the driving speed of the focus lens of the shooting lens 21 in the driving range of the shooting lens determined by the close end and the infinite end. The focus lens of the lens 16 is driven in the direction of the far end based on the current lens position, and the focus lens of the photographing lens 21 having a slow driving speed is driven in the direction of the near end opposite to the above direction. (Figs. 14b to 14c). In this way, by driving the focus lens of the photographing lens having a high driving speed for a long distance, the inversion operation at the closest end or the infinite end can be avoided as much as possible, and the detection time of the in-focus position can be shortened. Can do.

  14A to 14C are examples of driving directions (arrows) of the focus lenses of the photographing lenses 16 and 21 set by the CPU 117 based on the positions and driving speeds of the focus lenses of the photographing lenses 16 and 21, respectively. Indicates. FIG. 14a shows the case where the focus lens position of each of the photographing lenses 16 and 21 is near the center position, FIG. 14b shows the case near the closest end, and FIG. 14c shows the case near the infinite end. The vertical axis in FIG. 14 indicates the position of the focus lens, and indicates that the drive range of each focus lens of the photographing lenses 16 and 21 is between the closest end and the infinite end.

  Further, the center position shown in FIG. 14a is an intermediate position between the closest end and the infinite end. When the positions of the respective focus lenses by the initialization of the photographing lenses 16 and 21 are near the center position shown in FIG. 14a, the distances to the closest end and the infinite end are almost the same. Regardless of the driving speed of the lens, the driving direction of the focus lens of the photographing lenses 16 and 21 may be set. In this embodiment, as shown in FIG. 14a, the focus lens of the photographing lens 16 is driven in the direction of the infinite end and the focus lens of the photographing lens 21 is driven in the direction of the closest end. The driving directions may be set to the directions of the closest end and the infinite end, respectively.

  Here, the magnitude relationship between the driving speeds may be determined based on the AF control method in the specification information of the photographing lenses 16 and 21, the weight of the photographing lens, the driving performance of the motor of the lens driving unit, and the like. That is, for example, in the AF control method, the phase difference detection method can detect the in-focus position faster than the contrast detection method, and therefore the phase difference detection method drives the focus lens at a higher speed. Can do. On the other hand, in the case of the weight of the focus lens and the drive performance of the motor, the focus lens can be driven faster as the focus lens is lighter and the motor drive performance is better. Therefore, the CPU 117 according to the present embodiment estimates the driving speed of the focus lens of each of the photographing lenses 16 and 21 based on one or a plurality of pieces of specification information of the photographing lenses 16 and 21.

  Step S204: The CPU 117 causes the lens driving units (not shown) of the main camera 11 and the sub camera 12 to drive the focus lenses of the photographing lenses 16 and 21 based on the setting of Step S203.

  Step S205: The CPU 117 determines whether or not the focus detection units 117a and 217a have detected the in-focus position of one of the photographing lenses 16 and 21. When the focus detection unit 117a or the focus detection unit 217a detects the in-focus position, the CPU 117 proceeds to step S206 (YES side). On the other hand, when the focus position is not detected, the focus detection unit 117a proceeds to step S204 (NO side), and until the focus detection unit 117a or the focus detection unit 217a detects the focus position, Each of the focus lenses 21 is driven.

  Step S206: The CPU 117 calculates the in-focus position of the other taking lens based on the in-focus position detected by one of the focus detecting unit 117a and the focus detecting unit 217a, and the lens driving unit ( The focus lens of the other photographing lens is driven to the in-focus position calculated with respect to (not shown).

  The CPU 117 has a conversion coefficient for calculating the in-focus position of the photographic lens 21 (or 16) from the in-focus position of the photographic lens 16 (or 21) based on the specification information of the photographic lenses 16 and 21. To do.

  Step S207: The CPU 117 causes the imaging devices 110 and 210 to image the object scene in response to an imaging instruction for a full press operation of the release button 19 by the user. The CPU 117 causes the image processing unit 116 to perform image processing on the RAW image data captured by the image sensor 110 and records the generated image file in the storage medium 115. At the same time, the CPU 117 causes the image processing unit 216 to perform image processing on the image data captured by the image sensor 210 through the CPU 217, and records the generated image file in the storage medium 215. The CPU 117 ends a series of operations.

In this way, by driving the focus lens having a fast driving speed among the photographing lenses 16 and 21 in the direction toward the far end and the focus lens having a slow driving speed in the near end side. In-focus position can be detected at high speed and with high accuracy.
<Supplementary items for AF control operation>
(1) In the above AF control operation, the AF control of the camera system 10 in the case of cooperative imaging by the main camera 11 and the sub camera 12 has been described, but the present invention is not limited to this. The same applies to the case of single imaging with the main camera 11 or the sub camera 12. In the case of the moving image mode or the like, it is preferable that the CPU 117 drives the photographing lens whose driving sound of the lens driving unit is quieter in preference to the longer driving distance.

  (2) In the above AF control operation, it is assumed that the object scene of the main camera 11 and the object scene of the sub camera 12 overlap at least partially, but the present invention is not limited to this. For example, after the process of step S206, the CPU 117 determines, based on the through images captured by the image sensors 110 and 210, whether or not there is an overlapping field area as an image feature amount such as an image edge amount. You may determine based on. When the determination result is false, the CPU 117 displays a warning on the LCD 26 and the LCD 29, so that the imaging directions of the main camera 11 and the sub camera 12 (shooting) are set so that the field to be captured overlaps at least partly to the user. The optical axes 16a and 21a of the lenses 16 and 21 are adjusted. Then, the CPU 117 proceeds to step S204, and again causes the lens driving units (not shown) of the main camera 11 and the sub camera 12 to drive the focus lenses of the photographing lenses 16 and 21, respectively, to thereby detect the focus detection units 117a and 217a. To detect the in-focus position. Note that the adjustment of the imaging direction of the main camera 11 and the sub camera 12 is preferably performed based on the biaxial information output from the connection unit 13.

  (3) In the AF control operation, in step S206, the CPU 117 drives the other focus lens to the in-focus position based on the in-focus position of the focus lens previously detected. However, the present invention is not limited to this. Instead, each focus lens may detect the in-focus position based on the setting in step S203. Further, when imaging is performed with the main camera 11 or the sub camera 12 having the photographic lens whose focus position has been detected first, the process of step S206 may be omitted.

  (4) In the above AF control operation, the photographing lenses 16 and 21 are incorporated in the main camera 11 and the sub camera 12, but are not limited to this, and may be interchangeable lenses. The interchangeable lens preferably includes a memory for storing its own specification information. When the interchangeable lens is attached to the main camera 11 or the sub camera 12, the interchangeable photographing lens outputs its specification information to the CPU 117 or 217. It is preferable to do.

C) Moving Image Shooting Next, an example of moving image shooting by the camera system 10 will be described with reference to the flowchart of FIG. The process shown in FIG. 15 is started by the CPU 117 on the main camera 11 side, for example, in response to an instruction to start a shooting mode for shooting a moving image.

  Here, in the example of FIG. 15, the main camera 11 and the sub camera 12 will be described on the assumption that a common subject is imaged. In the example of FIG. 15, the moving images captured by the main camera 11 and the sub camera 12 are recording moving images stored in the nonvolatile storage medium 115.

  Step S301: The CPU 117 detects whether the sub camera 12 is attached to the main camera 11 based on whether or not the I / F 121a and 221a are electrically connected. Then, when the sub camera 12 is attached to the main camera 11 (when the electrical connection between the I / F 121a and 221a is established), the CPU 117 displays information on the moving image shooting function of the sub camera 12 as the sub camera 12. From a memory (not shown). Similarly, the CPU 117 acquires information on the moving image shooting function of the main camera 11 from the memory (not shown) of the sub camera 12.

  Here, the information on the moving image shooting function includes information on the frame rate of moving image shooting by each camera and the resolution (image size) of a moving image shot (captured) by each camera. Further, the CPU 117 may acquire information for obtaining a shift amount (parallax or the like) of a shooting range between the main camera 11 and the sub camera 12 from any memory.

  In the example of FIG. 15, both the main camera 11 and the sub camera 12 have a function of shooting a moving image that complies with an HD (high definition) or full HD video standard at a frame rate of 30 fps or 60 fps. For example, the main camera 11 and the sub camera 12 in this embodiment shoot a moving image having a size of 1920 × 1080 pixels at 60 fps when shooting a moving image for recording.

  In step S301, when the sub camera 12 is not attached to the main camera 11 (when the I / F 121a and 221a are not electrically connected), the CPU 117 performs video shooting only with the main camera 11 (in this case). Explanation of the operation is omitted).

  Step S302: The CPU 117 sets the imaging timing and the imaging conditions of the main camera 11 and the sub camera 12. For example, the CPU 117 may perform the following settings according to the purpose of moving image shooting in the camera system.

(1) In the case of moving image shooting at a high frame rate In this case, the main camera 11 and the sub camera 12 each record a moving image of the same subject and generate one moving image. In this case, it is possible to acquire a moving image with a higher frame rate than when shooting with one camera.

  In this case, the CPU 117 sets the imaging conditions (charge storage time of the imaging device, imaging sensitivity, image size, frame rate) of the main camera 11 and the sub camera 12 to be the same. Then, the CPU 117 shifts the imaging timing of the main camera 11 and the sub camera 12. For example, the CPU 117 shifts the imaging timing of the main camera 11 and the sub camera 12 by a half cycle.

  FIG. 16 is a diagram illustrating an example of the imaging timing of the main camera 11 and the sub camera 12 in the example (1). In the case of FIG. 16, the CPU 117 shifts the imaging timing of the main camera 11 and the sub camera 12 by 1/120 seconds, which is a half cycle of 60 fps. As a result, by alternately rearranging the frames of the main camera 11 and the sub camera 12 along the time axis, the camera system 10 can shoot a moving image at an apparent 120 fps.

  Note that the shift of the shooting start timing between the main camera 11 and the sub camera 12 can also be applied to continuous shooting of still images. In this case, for example, the continuous shooting mode may be selected by the rotary multi selector 28 and the continuous shooting may be started by the release button 19.

(2) In the case of moving image shooting under low luminance As a modification of the above (1), for example, when shooting a 60 fps moving image with the camera system 10, the frame rate of each camera is sufficient at 30 fps. That is, when shooting a moving image under low luminance, the charge accumulation time of each camera can be doubled compared to shooting a moving image with one camera. As a result, when a moving image is shot in a dark place, it is possible to take a moving image with good exposure while maintaining a relatively high frame rate.

  In this case, the CPU 117 may set the imaging conditions of the main camera 11 and the sub camera 12 to be the same and shift the imaging timing of the main camera 11 and the sub camera 12 by a half cycle.

(3) 3D moving image shooting In this case, a right-eye moving image and a left-eye moving image are respectively captured by each camera of the camera system 10 to generate a 3D moving image.

  In this case, the CPU 117 sets the imaging conditions of the main camera 11 and the sub camera 12 to be the same and adjusts the hinge of the connection unit 13 so that the optical axes 16a and 21a are parallel. Then, the CPU 117 synchronizes the imaging timing of the main camera 11 and the sub camera 12. FIG. 17 is a diagram illustrating an example of the imaging timing of the main camera 11 and the sub camera 12 in the example (3). In the case of FIG. 17, the CPU 117 synchronizes the imaging timing of the main camera 11 and the sub camera 12 at 60 fps. Thereby, 3D moving image data at 60 fps can be generated.

(4) HDR (High Dynamic Range Compositing) Movie Shooting Similarly to HDR movie shooting, the hinges of the connecting portion 13 are adjusted so that the optical axes 16a and 21a are parallel, as in 3D movie shooting. Part of the image captured by the photographic lens 16 and the image captured by the photographic lens 21 overlap. Further, by setting the zoom lens of each of the photographing lens 16 and the photographing lens 21 to the wide side, overlapping portions are increased, and trimming processing by the image processing unit 116 is facilitated.

  In this case, the CPU 117 sets the imaging sensitivity of one camera low and sets the imaging sensitivity of the other camera high. Then, the CPU 117 sets the frame rates of the main camera 11 and the sub camera 12 to be the same, and synchronizes the imaging timing as in the case of FIG.

  Step S303: The CPU 117 performs moving image shooting according to the setting in step S302.

  For example, in response to an instruction for moving image shooting (moving image shooting SW (not shown), operation of the rotary multi selector 28, release button 19), the CPU 117 starts shooting a moving image. At this time, the CPU 117 comprehensively controls moving image shooting by the main camera 11 and the sub camera 12.

  A RAW image captured by the image sensor 110 of the main camera 11 is recorded in the buffer memory 112 via the AFE 111 and the bus. On the other hand, a RAW image captured by the image sensor 210 of the sub camera 12 is recorded in the buffer memory 212 via the AFE 211 and the bus.

  Under the control of the CPU 117, the image processing unit 116 on the main camera 11 side alternately reads RAW images from the buffer memory 112 of the main camera 11 and the buffer memory 212 of the sub camera 12 and performs image processing. The image subjected to the image processing is output to the LCD 26 as one moving image data along the time series or stored in the storage medium 115. Note that the data may be temporarily recorded in the buffer memory 112 before being stored in the storage medium 115. Thereby, the frame of the moving image captured by the sub camera 12 is inserted in a time series between the frames of the moving image captured by the main camera 11.

  At this stage, the image processing unit 116 may perform image trimming processing according to the parallax between the main camera 11 and the sub camera 12 or HDR image synthesis processing as necessary.

  In step S303, the CPU 117 may record a sound during moving image shooting. At this time, the CPU 117 may perform recording using all of the four microphones 17a, b, 22a, b, or may record using two microphones 17a, 22b arranged outside each camera. When recording with the microphones 17a and 22b, the CPU 117 reverses the phase of the sound collected by the microphones 17b and 22a and outputs it through a speaker (not shown), thereby canceling noise such as mechanical sound. May be.

  Step S304: The CPU 117 generates a moving image file by associating the moving image data and the recording data in step S303. Then, the CPU 117 records the moving image file on the storage medium 115 via the recording I / F 114.

  Note that the CPU 117 includes, in the moving image file, additional information for identifying a frame captured by the main camera 11 and a frame captured by the sub camera 12 in the moving image. Such supplementary information is useful information when performing post-processing of image trimming according to parallax between cameras, when performing post-processing of HDR image composition, or when performing 3D video playback. Become. Note that the supplementary information may be, for example, information that gives only one piece of information indicating a camera corresponding to an even frame and a camera corresponding to an odd frame to one moving image. Each may be provided with camera information.

  Step S305: The CPU 117 determines whether an instruction to end moving image shooting has been issued. If the above requirement is satisfied (YES side), the CPU 117 ends the process of this flowchart. On the other hand, if the above requirement is not satisfied (NO side), the process returns to step S303 and the CPU 117 repeats the above processing.

  With the above operation, when the camera system 10 captures a moving image with two imaging devices connected, the frame of the moving image of the sub camera 12 is converted to the moving image of the main camera 11 in time series. It is stored in the storage medium 115 so as to be inserted. As a result, it is possible to handle images captured by the two imaging devices as one moving image.

<< Variation 1 of video shooting operation >>
FIG. 18 is a flowchart showing another example of moving image shooting by the camera system 10.
The example of FIG. 18 is a modification of FIG. 15, and is a case where a through image is displayed on the LCD in a still image shooting mode.

  In the example of FIG. 18, it is assumed that the main camera 11 and the sub camera 12 image a common subject. The moving images captured by the main camera 11 and the sub camera 12 are low-resolution moving images for observation (so-called through images) displayed on the LCD (26 or 29) for framing.

  Step S401: The CPU 117 detects whether the sub camera 12 is attached to the main camera 11 based on whether or not the I / F 121a and 221a are electrically connected. Then, when the sub camera 12 is attached to the main camera 11 (when the electrical connection between the I / F 121a and 221a is established), the CPU 117 displays information on the moving image shooting function of the sub camera 12 as the sub camera 12. From a memory (not shown). Similarly, the CPU 117 acquires information on the moving image shooting function of the main camera 11 from the memory (not shown) of the sub camera 12.

  In step S401, when the sub camera 12 is not attached to the main camera 11 (when the I / F 121a and 221a are not electrically connected), the CPU 117 performs shooting with only the main camera 11 (in this case). The explanation of the operation is omitted).

  Step S402: The CPU 117 performs setting of imaging timing and imaging conditions of the main camera 11 and the sub camera 12. For example, the CPU 117 may perform the same setting as in (2) of step S302 above when shooting a through image.

  Step S403: The CPU 117 performs moving image shooting according to the setting in step S402.

  For example, in response to the start operation of the shooting mode, the CPU 117 starts shooting a moving image (through image). At this time, the CPU 117 comprehensively controls the shooting of through images with the main camera 11 and the sub camera 12.

  An image captured by the image sensor 110 of the main camera 11 is recorded in the buffer memory 112 via the AFE 111 and the bus. On the other hand, an image captured by the image sensor 210 of the sub camera 12 is recorded in the buffer memory 212 via the AFE 211 and the bus.

  Under the control of the CPU 117, the image processing unit 116 on the main camera 11 side alternately reads through images from the buffer memory 112 of the main camera 11 and the buffer memory 212 of the sub camera 12, and performs image processing. At this stage, the image processing unit 116 appropriately performs image trimming processing according to the parallax between the cameras.

  Thereafter, the through image subjected to the image processing is displayed on the LCD 26. Accordingly, the frame of the through image captured by the sub camera 12 is displayed in a state of being inserted in time series between the frames of the through image captured by the main camera 11.

  Step S404: The CPU 117 determines whether there is an instruction to capture a still image. If the above requirement is satisfied (YES side), the process proceeds to S405. On the other hand, if the above requirement is not satisfied (NO side), the process returns to step S403 and the CPU 117 repeats the above processing.

  Step S405: The CPU 117 captures a recording still image with the main camera 11. At this time, the RAW image captured by the image sensor 110 is subjected to image processing by the image processing unit 116 and then stored in the storage medium 115. Thereafter, the CPU 117 ends the process of this flowchart.

  With the above operation, when the camera system 10 captures a through image in a state where two imaging devices are connected, the frame of the through image of the sub camera 12 is changed to the through image of the main camera 11 in time series. It is inserted and displayed on the LCD 26. Accordingly, when performing framing in a dark place, it is possible to display a through image with good exposure on the LCD 26 while maintaining a relatively high frame rate.

≪Modification 2 of video shooting operation≫
FIG. 19 is a diagram illustrating another example of the imaging timing of the main camera 11 and the sub camera 12. FIG. 19 is an example in which a moving image is captured by the main camera 11 and AF information and AE information are acquired by the sub camera 12.

  In the example of FIG. 19, it is assumed that the main camera 11 and the sub camera 12 image a common subject. The main camera 11 captures a recording moving image having a size of 1920 × 1080 pixels at 60 fps. On the other hand, the sub camera 12 reads the signal value of the AF area of the image sensor 210 at 120 fps. Since the sub camera 12 partially reads out only a part of the signals in the imaging range, it can be read out at a higher frame rate than in the case of reading out an image. In the case of Modification 2 described above, the CPU 117 may read out the AF area signal value from the sub camera 12 at 60 fps and shift the frame rates of the main camera 11 and the sub camera 12 by a half cycle.

  In the example of FIG. 19, the CPU 117 can acquire, for example, contrast detection AF information with the sub camera 12 while the main camera 11 captures a recording moving image. Then, the CPU 117 can omit the focus detection using the focus detection unit 117a, and can focus the focus lens of the photographing lens 16 of the main camera 11 using the AF information of the sub camera 12.

  In general, when contrast detection AF is performed using the output of an image sensor that captures a recording moving image, the recording moving image may be blurred when searching for the peak of the focal position. In the case of Modification 2 described above, the shooting lens 16 of the main camera 11 can be directly moved to the in-focus position using the AF information acquired by the sub camera 12. Therefore, in the case of the above modification 2, the recording moving image can be always focused on the subject.

  In the example of FIG. 19, a moving image is captured by the main camera 11 and AF information and AE information are acquired by the sub camera 12. However, when continuous shooting is performed by the main camera 11, AF is performed by the sub camera 12. Information and AE information may be acquired. In particular, when the main camera is a single-lens reflex camera equipped with a quick return mirror, the field information can be output from the sub camera 12 to the CPU 117 regardless of the operation of the quick return mirror during continuous shooting. When the photographing lens 21 of the sub camera 12 is a wider-angle lens than the photographing lens 16 of the main camera 11, the white balance value of the main camera 11 is set based on the field information acquired by the photographing lens 21. Or may be corrected.

DESCRIPTION OF SYMBOLS 10 ... Camera system, 11 ... Main camera, 12 ... Sub camera, 26 ... LCD, 114 ... Recording I / F, 115 ... Storage medium, 117 ... CPU, 121a-d, 221a-d ... I / F

Claims (10)

A recording device for recording an image captured by the first imaging device on a storage medium;
A detection unit that detects that a second imaging device that is detachable from the first imaging device and can capture a moving image is attached to the first imaging device;
A control unit that stores a moving image captured by the second imaging device in the storage medium when the second imaging device is mounted on the first imaging device;
An electronic device comprising: The electronic device according to claim 1,
The said control part memorize | stores the image imaged by the said 1st imaging device, and the moving image imaged by the said 2nd imaging device in the said storage medium in time series. The electronic device according to claim 1 or claim 2,
The first imaging device captures a moving image at a first frame rate;
The electronic device, wherein the control unit performs storage in the storage medium so as to insert a moving image captured by the second imaging device between moving images captured at the first frame rate. The electronic device according to any one of claims 1 to 3,
The control unit causes the first imaging device and the second imaging device to capture moving images at the same frame rate, and shifts the imaging timing of the first imaging device and the second imaging device. machine. The electronic device according to claim 4,
The said control part shifts the imaging timing of a said 1st imaging device and a said 2nd imaging device by a half cycle, The electronic device characterized by the above-mentioned. The electronic device according to claim 1,
The control unit causes the first imaging device and the second imaging device to capture moving images at the same frame rate, and synchronizes the imaging timings of the first imaging device and the second imaging device. Electronic equipment. The electronic device according to claim 6,
The electronic device is characterized in that the control unit makes the imaging sensitivity of the first imaging device different from the imaging sensitivity of the second imaging device. The electronic device according to any one of claims 1 to 7,
The said control part memorize | stores the incidental information for identifying the image imaged with the said 1st imaging device, and the image imaged with the said 2nd imaging device in the said storage medium, The electronic device characterized by the above-mentioned. A detection unit that detects that a second imaging device that is detachable from the first imaging device is attached to the first imaging device;
When the second imaging device is attached to the first imaging device, the focus position when the first imaging device captures an image is adjusted using the subject information acquired by the second imaging device. A control unit,
An electronic device comprising: The electronic device according to claim 9, wherein
The first imaging device is an electronic device that performs continuous shooting of a moving image or a still image.

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