JP2018081121A - Imaging system and control method thereof - Google Patents

Abstract

Illumination light is irradiated to a partial range desired by a photographer within a shooting angle of view.
An imaging system includes a camera main body and a strobe device including a light emitting unit that irradiates illumination light onto a subject imaged by the camera main body. A bounce circuit 340 that rotates about the optical axis of the unit, a CCPU 101 that determines a shooting scene, and an FPU 310 that controls driving of the bounce circuit 340 according to the determined shooting scene.
[Selection] Figure 1

Description

  The present invention relates to an imaging system and a control method thereof.

  There is a shooting scene where you can take a commemorative photo with an indoor observation deck. FIG. 9 is a schematic diagram showing a scene in which a person (main subject) stands in front of a window glass such as an observation deck and photographs a landscape behind the window glass together with the person with the window glass as a background. When shooting against a background of a highly reflective object such as a window glass, particularly when the interior is bright and dark, such as when shooting night scenes, the window glass appears to be reflected. If it is dark, the person will be underexposed. Also, not only high reflectors such as window glass, but when the person is close to the background, such as when the person is standing near the wall, the illumination light from the lighting device is unnatural on the wall Cause reflections and reflections. Therefore, when it is desired to suppress the reflection on the window glass while preventing the person from being underexposed, or when the background is close to the person, it may be effective to partially irradiate the illumination light.

  However, in the case of a general illumination device (strobe device) using a xenon tube, when the camera body is in the normal position, as shown in FIG. The shooting angle of view is set so that the illumination light irradiation range substantially matches. Therefore, in order to partially irradiate within the shooting angle of view, it is also necessary to shift the irradiation direction of the light emitting unit of the illumination device as shown in FIG. 9B. However, even if the light emitting part is shifted, the irradiation range is a horizontally long ellipse according to the aspect ratio of the camera, so that it is difficult to irradiate the intended range, for example, it is difficult to illuminate the head of a person. Sometimes. Further, it is troublesome for the photographer to manually check the composition after rotating the light emitting unit and repeat fine adjustment of the irradiation direction.

  Technologies for solving such problems are proposed in Patent Documents 1 and 2. In Patent Literature 1, a photographing screen is divided into a plurality of parts, a plurality of light emitting units that irradiate illumination light independently to the divided regions, and a plurality of light receiving units that independently receive reflected light from the divided regions. An illumination device having an element and a control device that stops irradiation of illumination light according to the amount of received light is described. Japanese Patent Application Laid-Open No. 2004-228561 has an imaging device that outputs a subject image as image data, and a light emitting unit that is built in or removable from the imaging device, and that emits light according to the aspect ratio and aspect ratio of the image data output area of the imaging device. An illuminating device for controlling the light distribution is described.

Japanese Patent Publication No. 7-15541 JP 2010-141457 A

  However, since the technique described in Patent Document 1 uses a plurality of light emitting units, there is a problem in that unevenness in brightness tends to occur due to the occurrence of areas where the irradiated illumination light overlaps and areas where they do not overlap. . Further, the irradiation range can be set only in the division direction designed in advance, and it may be difficult to set the irradiation range appropriately depending on the shooting scene. In the technique described in Patent Document 2, the vertical and horizontal directions of the arc tube are switched in accordance with the aspect ratio of the shooting angle of view. However, the irradiation range itself irradiates the entire shooting angle of view. Irradiation with illumination light is not considered.

  An object of the present invention is to provide an imaging system capable of irradiating illumination light to a partial range desired by a photographer within an imaging angle of view.

  An imaging system according to the present invention is an imaging system including an imaging unit and a light emitting unit that irradiates illumination light to a subject imaged by the imaging unit, and the attitude of the light emitting unit is at least an optical axis of the light emitting unit. And a control means for controlling the driving of the driving means in accordance with the photographic scene determined by the determining means.

  According to the present invention, it is possible to irradiate illumination light to a partial range desired by a photographer within a shooting angle of view.

1 is a block diagram illustrating a schematic configuration of an imaging system according to an embodiment of the present invention. It is sectional drawing which shows schematic structure of an imaging system. It is a flowchart explaining the control in the camera main body in imaging | photography process. It is a flowchart explaining the control in the strobe device in photographing processing. It is a perspective view which shows an example of the attitude | position which a strobe device can take. It is a figure explaining an example of the relationship between an imaging | photography scene and the irradiation range of illumination light. It is a figure which shows an example of the relationship between another imaging | photography scene and the irradiation range of general illumination light. It is a figure explaining the irradiation range of the illumination light suitable for the imaging | photography scene of FIG. It is a figure explaining an example of the relationship between the imaging | photography scene and the conventional irradiation range of illumination light.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram illustrating a schematic configuration of an imaging system 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a schematic configuration of the imaging system 10. In FIG. 1 and FIG. 2, the same elements are denoted by the same reference numerals. The imaging system 10 includes a camera body 100 that is an imaging device, a lens barrel 200 that is attached to the camera body 100, and a strobe device 300 that is an illumination device attached to the camera body 100. The strobe device 300 is detachable from the camera body 100, and the lens barrel 200 may be fixed (integrated) to the camera body 100, or may be detachable from the camera body 100.

  The camera body 100 includes a camera microcomputer 101 (hereinafter referred to as “CCPU101”), an image sensor 102, a shutter 103, a main mirror 104, a focus plate 105, a photometric circuit 106, a focus detection circuit 107, a gain switching circuit 108, and an A / D conversion. A vessel 109 is provided. The camera body 100 includes a timing generator (TG) 110 signal processing circuit 111, an input unit 112, a display unit 113, a pentaprism 114, a sub mirror 115, a communication line LC, a communication line SC, a terminal 120, a terminal 130, and an attitude detection circuit. 140.

  The CCPU 101 is a microcomputer that controls the operation of each unit of the camera body 100 by executing various software (program codes). The CCPU 101 includes a one-chip IC circuit configuration with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. It has become. The CCPU 101 performs various determination processes and arithmetic processes for controlling the camera body 100 by developing predetermined program codes stored in the ROM in the RAM. The image sensor 102 is an image sensor such as a CCD sensor or a CMOS sensor including an infrared cut filter and a low-pass filter. The light flux from the subject that has passed through the lens barrel 200 forms an image of the subject on the image sensor 102. The shutter 103 is configured to be able to transition between a state where the image sensor 102 is shielded from light and a state where the image sensor 102 is exposed. The main mirror 104 is a half mirror, and is retracted from a position where a part of light incident through the lens barrel 200 is reflected to form an image on the focus plate 105 and a photographing optical path from the lens barrel 200 to the image sensor 102. It is configured to be capable of transitioning to and from the position to be performed. A subject image is formed on the focus plate 105. The user (photographer) can check the subject image formed on the focus plate 105 via an optical finder (not shown).

  The photometric circuit 106 includes a photometric sensor in the circuit, and outputs exposure information by performing photometry in one or a plurality of areas set for the subject. Note that the photometry sensor in the photometry circuit 106 expects a subject image formed on the focusing screen 105 via the pentaprism 114. The focus detection circuit 107 includes a distance measuring sensor having a plurality of distance measuring points in the circuit, and outputs focus information such as a defocus amount of each distance measuring point. The gain switching circuit 108 amplifies the signal output from the image sensor 102. The CCPU 101 switches the gain to be applied to the signal in the gain switching circuit 108 in accordance with the shooting condition, user operation, and the like. The A / D converter 109 converts the analog signal output from the gain switching circuit 108 into a digital signal, thereby generating image data. The timing generator 110 synchronizes the signal output timing from the image sensor 102 (the input timing of the amplified signal from the gain switching circuit 108 to the A / D converter 109) and the A / D conversion timing in the A / D converter 109. Let

  The signal processing circuit 111 performs predetermined signal processing on image data composed of digital signals output from the A / D converter 109. The input unit 112 includes operation units such as a power switch, a release button, and a setting button. The CCPU 101 executes various processes based on instructions from the input unit 112 according to operations on the input unit 112. For example, when the release button is operated in one step (half-pressed), the release switch SW1 is turned on, and the CCPU 101 executes shooting preparation operations such as AF (autofocus) and AE (automatic exposure). When the release button is operated in two steps (fully pressed), the release switch SW2 is turned on, and the CCPU 101 executes a series of shooting operations from exposure to the image sensor 102 to storage of the generated image data. Various settings of the strobe device 300 can be performed by operating the setting buttons. Here, when wireless communication is possible between the strobe device 300 and the camera body 100, various types of the strobe device 300 may be provided as in the case where the strobe device 300 is not directly attached to the camera body 100. Can be set.

  The display unit 113 includes a liquid crystal device and a light emitting element, and displays a shooting mode set for the camera body 100 and other shooting information. The liquid crystal device displays a subject image and a shot image being shot. Playback display and the like are also possible. The pentaprism 114 guides the subject image on the focusing screen 105 to a photometric sensor in the photometric circuit 106 and an optical viewfinder (not shown). The sub mirror 115 guides the light incident from the lens group 202 and transmitted through the main mirror 104 to the distance measuring sensor of the focus detection circuit 107.

  The communication line LC is an interface signal line that connects the camera body 100 and the lens barrel 200 so that they can communicate with each other. The communication line SC is an interface signal line that connects the camera body 100 and the strobe device 300 so that they can communicate with each other. . The imaging system 10 includes terminals 120 and 130 for performing three-terminal serial communication as an example of communication using the communication lines LC and SC, and performs information communication such as data exchange and command transmission using the CCPU 101 as a host. . The terminal 120 includes an SCLK_L terminal, a MOSI_L terminal, a MISO_L terminal, and a GND terminal. The SCLK_L terminal is a terminal for synchronizing communication between the camera body 100 and the lens barrel 200. The MOSI_L terminal is a terminal for transmitting data from the camera body 100 to the lens barrel 200. The MISO_L terminal is a terminal for transmitting data from the lens barrel 200 to the camera body 100. The GND terminal connects the camera body 100 and the lens barrel 200 and drops them to the ground potential. The terminal 130 includes an SCLK_S terminal, a MOSI_S terminal, a MISO_S terminal, and a GND terminal. The SCLK_S terminal is a terminal for synchronizing communication between the camera body 100 and the flash device 300. The MOSI_S terminal is a terminal for transmitting data from the camera body 100 to the strobe device 300. The MISO_S terminal connects the camera body 100 and the strobe device 300 and drops them to the ground potential.

  The posture detection circuit 140 is a circuit that detects a posture difference of the camera body 100, and includes a posture H detection unit 140a that detects a posture difference in the horizontal direction, a posture V detection unit 140b that detects a posture difference in the vertical direction, and a front-rear direction ( A posture Z detection unit 140c that detects a posture difference in the Z direction) is included. For the posture detection circuit 140, for example, an angular velocity sensor or a gyro sensor is used. Posture information regarding the posture difference in each direction detected by the posture detection circuit 140 is supplied to the CCPU 101.

  The lens barrel 200 includes a lens microcomputer 201 (hereinafter referred to as “LPU 201”), a lens group 202, a lens driving unit 203, an encoder 204, an aperture 205, and an aperture control circuit 206. The LPU 201 is a microcomputer that controls each part of the lens barrel 200. The LPU 201 includes, for example, a one-chip IC circuit configuration with a built-in microcomputer including a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. It has become.

  The lens group 202 includes a plurality of lenses including a focus lens and a zoom lens. The lens group 202 may not include a zoom lens. The lens driving unit 203 drives the lenses included in the lens group 202 in the optical axis direction. The driving amount of the lens group 202 is calculated by the CCPU 101 based on the output of the focus detection circuit 107 provided in the camera body 100, and the calculated driving amount is transmitted from the CCPU 101 to the LPU 201. The encoder 204 detects the position of the lens group 202 and outputs drive information to the LPU 201. The drive information from the encoder 204 is transmitted to the CCPU 101 via the LPU 201, and the lens drive unit 203 drives the lens group 202 by the drive amount calculated by the CCPU 101, thereby performing focus adjustment. The diaphragm 205 adjusts the amount of light passing through the lens barrel 200. A diaphragm control circuit 206 drives the diaphragm 205 under the control of the LPU 201.

  The strobe device 300 is roughly detachable from the camera main body 100, and can be rotated in the vertical and horizontal directions with respect to the main body 300a, and can be rotated around the optical axis of the light emitting unit. It is comprised from the movable part 300b. The optical axis of the light emitting part is substantially parallel to the direction connecting the center of the light emitting part and the center of the illumination light irradiation range. The vertical direction is a direction substantially parallel to the vertical direction when the camera body 100 is held in a normal posture. The left-right direction is a direction orthogonal to the vertical direction when the camera body 100 is held in a normal posture. Two central axes that rotate the movable part 300b in the vertical and horizontal directions are substantially orthogonal to the optical axis of the light emitting part.

  The strobe device 300 includes a battery 301, a booster circuit block 302, a trigger circuit 303, a light emission control circuit 304, a discharge tube 305, a reflector 306, a strobe optical system 307, an integration circuit 309, and an AND gate 311. The strobe device 300 includes a strobe microcomputer 310 (hereinafter referred to as “FPU 310”), an input unit 312, a display unit 313, a photodiode 314, a comparator 315, an optical system drive circuit 330, a bounce circuit 340, and an attitude detection circuit 360.

  The FPU 310 is a microcomputer that controls each part of the strobe device 300. The FPU 310 has a microcomputer built-in one-chip IC circuit configuration including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. ing. The battery 301 functions as a power source (VBAT) for the strobe device 300. The booster circuit block 302 includes a booster 302a, resistors 302b and 302c, and a main capacitor 302d. The booster 302a boosts the voltage of the battery 301 to several hundred volts, thereby charging the main capacitor 302d with electric energy for light emission. The charging voltage of the main capacitor 302d is divided by the resistors 302b and 302c, and the divided voltage is input to the A / D conversion terminal of the FPU 310. The trigger circuit 303 applies a pulse voltage for exciting the discharge tube 305 to the discharge tube 305. The light emission control circuit 304 controls the start and stop of light emission of the discharge tube 305. The discharge tube 305 is excited by receiving a pulse voltage of several KV applied from the trigger circuit 303, and emits light using the electric energy charged in the main capacitor 302d.

  The integration circuit 309 integrates the light reception current of the photodiode 314 and inputs the integration result to the inverting input terminal of the comparator 315 and the A / D converter terminal of the FPU 310. The non-inverting input terminal of the comparator 315 is connected to the D / A converter terminal in the FPU 310, and the output of the comparator 315 is connected to the input terminal of the AND gate 311. The other input terminal of the AND gate 311 is connected to the light emission control terminal of the FPU 310, and the output of the AND gate 311 is input to the light emission control circuit 304.

  The photodiode 314 is a sensor that receives light emitted from the discharge tube 305 directly or via a glass fiber or the like. The reflector 306 reflects the light emitted from the discharge tube 305 and guides it in a predetermined direction. The strobe optical system 307 includes an optical panel or the like, and is held so that the relative position with respect to the discharge tube 305 can be changed. By changing the relative position of the discharge tube 305 and the strobe optical system 307, the irradiation range of illumination light such as flash light (strobe light) emitted from the light emitting unit to the subject can be changed within a predetermined range. The light emitting unit of the strobe device 300 includes a discharge tube 305, a reflector 306, a strobe optical system 307, and the like. The light distribution angle of the light emitting part can be changed by driving the strobe optical system 307, and the irradiation direction of the illumination light from the light emitting part can be changed by the rotation of the movable part 300b. The method of changing the light distribution angle of the light emitting unit is not limited to the method of changing the relative position between the discharge tube 305 and the strobe optical system 307. For example, the method of changing the shape of the reflector 306 or the strobe optical system 307 is used. For example, a method of changing the optical characteristics of the above may be used.

  The input unit 312 includes operation units such as a power switch, a mode setting switch for setting the operation mode of the strobe device 300, an auto bounce start button for executing auto bounce driving, and setting buttons for setting various parameters. The FPU 310 executes various processes based on instructions from the input unit 312 according to operations on the input unit 312. In the present embodiment, automated bounce flash photography performed by the imaging system 10 is referred to as auto bounce flash photography. In addition, the auto bounce drive refers to rotationally driving the movable part 300b for executing auto bounce flash photography.

  The display unit 313 includes a liquid crystal device and a light emitting element, and displays various setting information and operation states of the strobe device 300. The optical system drive circuit 330 includes a position detection unit 330a and an optical system drive unit 330b, and has a zoom function of adjusting the illumination light irradiation range. The position detector 330a detects information related to the relative positions of the discharge tube 305 and the strobe optical system 307 by an encoder (not shown) or the like. The optical system driving unit 330b includes a motor or the like for driving the strobe optical system 307. The FPU 310 acquires the focal length information output from the LPU 201 via the CCPU 101, and calculates the drive amount of the strobe optical system 307 based on the acquired focal length information.

  The bounce circuit 340 detects the driving amount of the movable part 300b (the rotation angle of the movable part 300b with respect to the main body part 300a). The bounce circuit 340 includes a first bounce angle detection circuit 340a, a second bounce angle detection circuit 340c, a third bounce angle detection circuit 340e, a first bounce drive circuit 340b, a second bounce drive circuit 340d, and a third bounce circuit 340d. Bounce drive circuit 340f. The first bounce angle detection circuit 340a (bounce H detection circuit) detects the drive amount of the movable unit 300b in the left-right direction. The second bounce angle detection circuit 340c (bounce V detection circuit) detects the driving amount of the movable unit 300b in the vertical direction. The third bounce angle detection circuit 340e (bounce Z detection circuit) detects the driving amount of rotation of the movable unit 300b with the optical axis of the light emitting unit as the rotation center. A rotary encoder or an absolute encoder is used to detect each drive amount of the movable part 300b. The first bounce drive circuit 340b (bounce H drive circuit) drives the movable portion 300b in the left-right direction. The second bounce drive circuit 340d (bounce V drive circuit) drives the movable portion 300b in the vertical direction. The third bounce drive circuit 340f (bounce Z drive circuit) drives the rotation of the optical axis of the movable part 300b. A known motor or the like is used for these drives.

  The posture detection circuit 360 is a circuit that detects a posture difference of the strobe device 300, and includes a posture H detection unit 360a that detects a posture difference in the horizontal direction, a posture V detection unit 360b that detects a posture difference in the vertical direction, and a front-rear direction ( A posture Z detection unit 360c that detects a posture difference in the Z direction) is provided. For the posture detection circuit 360, for example, an angular velocity sensor or a gyro sensor is used. Posture information regarding the posture difference in each direction detected by the posture detection circuit 360 is supplied to the FPU 310.

  In the imaging system 10 configured as described above, the CCPU 101, the LPU 201, and the FPU 310 cooperate to control each part of the imaging system 10, thereby realizing a smooth operation of the entire imaging system 10.

  Next, a flow of processing executed by the imaging system when shooting using the imaging system 10 will be described. FIG. 3 is a flowchart of processing executed by the CCPU 101 in the shooting processing executed by the imaging system 10. Each process of the flowchart of FIG. 3 is realized by the CCPU 101 controlling the operation of each unit constituting the camera body 100 by causing the CPU to expand a predetermined program stored in the ROM into the RAM. When the power switch included in the input unit 112 provided in the camera body 100 is turned on, the CCPU 101 can operate.

  In step S1, the CCPU 101 initializes its own memory and port. Further, the CCPU 101 reads the state of a switch included in the input unit 112 and preset input information, and sets a shooting mode suitable for the subject such as a shutter speed and a method of determining an aperture. In step S2, the CCPU 101 determines whether or not the release button included in the input unit 112 is half pressed and the release switch SW1 is turned on. The CCPU 101 waits until the release switch SW1 is turned on (NO in S2). If the CCPU 101 determines that the release switch SW1 is turned on (YES in S2), the process proceeds to step S3. In step S <b> 3, the CCPU 101 communicates with the LPU 201 of the lens barrel 200 to acquire focal length information of the lens barrel 200, focus adjustment, and optical information (lens information) necessary for photometry. In step S <b> 4, the CCPU 101 determines whether the strobe device 300 is attached to the camera body 100. If the CCPU 101 determines that the strobe device 300 is attached (YES in step S4), the process proceeds to step S5. If the CCPU 101 determines that the strobe device 300 is not attached (NO in step S4), the process is performed. Proceed to step S8b. Note that the attachment of the strobe device 300 determined in step S4 may be a connection using wireless communication or a connection using an off-shoe cord. The wireless communication is not performed using the communication line SC but using a wireless communication unit (not shown).

  In step S5, the CCPU 101 communicates with the FPU 310 of the strobe device 300 via the communication line SC, and acquires strobe information such as the ID of the strobe device 300, a guide number, and charging information indicating the charging state of the main capacitor 302d from the FPU 310. . Also, the CCPU 101 transmits the focal length information acquired in step S3 to the FPU 310. As a result, the FPU 310 calculates the drive amount of the strobe optical system 307 based on the focal length information received from the CCPU 101, and moves the strobe optical system 307 based on the calculated drive amount to change the irradiation range of the strobe device 300 to the focal length. Change the range to match.

  In step S <b> 6, the CCPU 101 prepares to transmit information regarding the strobe device 300 input via the input unit 112 to the FPU 310 of the strobe device 300. Here, information regarding the flash device 300 is determined and converted into command transmission. In step S <b> 7, the CCPU 101 transmits information on the strobe device 300 prepared in step S <b> 6 to the strobe device 300.

  In step S8a, the CCPU 101 determines whether or not the focus adjustment mode set in the camera body 100 is the AF mode. If the CCPU 101 determines that the AF mode is set (YES in S8a), the process proceeds to step S9a. On the other hand, if the CCPU 101 determines that the AF mode is not set (NO in S8a), the CCPU 101 determines that the manual focus mode (MF mode) is set, and the process proceeds to step S11.

  In step S9a, the CCPU 101 drives the focus detection circuit 107 to perform a focus detection operation by a known phase difference detection method. In step S9a, a focus point (ranging point) to be focused from a plurality of focus points in focus adjustment is a well-known automatic selection algorithm based on the concept of near point priority or a user's input to the input unit 112. It is determined according to the operation. In step S10a, the CCPU 101 stores the distance measurement point determined in step S9a in the RAM in the CCPU 101. In step S10a, the CCPU 101 calculates the driving amount of the lens group 202 based on the focus information from the focus detection circuit 107, communicates with the LPU 201, and moves the lens group 202 based on the calculated driving amount. After step S10a, the process proceeds to step S11.

  In step S11, the CCPU 101 determines whether or not the light emission mode is set to the partial light emission mode. When the CCPU 101 determines that the partial light emission mode is set (YES in S11), the process proceeds to step S12, and when it is determined that the partial light emission mode is not set (entire light emission mode) (in S11). NO), the process proceeds to step S16. The partial light emission mode refers to an operation mode in which illumination light is irradiated only to a part of the photographing range from the light emitting unit of the strobe device 300. On the other hand, the overall light emission mode refers to an operation mode in which illumination light is irradiated from the light emitting unit of the strobe device 300 to almost the entire photographing range.

  In step S12, the CCPU 101 discriminates a shooting scene based on information from the photometric circuit 106 and the like. In step S13, the CCPU 101 determines whether or not the shooting scene can be determined based on the determination result in step S12. If the CCPU 101 determines that the photographic scene can be determined (YES in S13), the process proceeds to step S14. If the CCPU 101 determines that the photographic scene cannot be determined (NO in S13), the process proceeds to step S14. Proceed to S16.

  In step S <b> 14, the CCPU 101 determines an irradiation range in partial light emission based on the information regarding the shooting scene determined in step S <b> 12. In subsequent step S15, the CCPU 101 performs a partial light emission process. In step S15, the CCPU 101 stores information on the irradiation range determined in step S14 in the RAM in the CCPU 101. Then, the CCPU 101 acquires the attitude information of the light emitting unit detected by the bounce circuit 340 from the FPU 310 via the communication line SC and stores it in the RAM in the CCPU 101. Furthermore, the CCPU 101 calculates the driving amount of the movable unit 300b based on the information regarding the irradiation range stored in the RAM in the CCPU 101 and the posture information of the light emitting unit. The CCPU 101 transmits the calculated drive amount to the FPU 310 via the communication line SC. The FPU 310 moves the movable unit 300b to a predetermined position based on the acquired drive amount, and performs a light emission process. Details of each process of discrimination of the shooting scene and partial light emission will be described later. After execution of step S15, the process proceeds to step S29.

  If the determination in step S11 is NO because the entire light emission mode is set, the movable unit 300b can be automatically driven. Therefore, in addition to the normal flash photography, the flash photography 300 (hereinafter referred to as “auto bounce”) is used for automatic flash photography that irradiates the subject with illumination light from the strobe device 300 toward the ceiling and the like, and irradiates the diffuse reflection light from the ceiling and the like. "Flash photography"). Note that normal flash photography refers to flash photography that is performed with the movable unit 300b positioned at a front reference position (both bounce angles in the horizontal and vertical directions are 0 degrees). The processes in steps S16 to S28 are processes related to auto bounce flash photography.

  In step S <b> 16, the CCPU 101 determines whether or not the irradiation position in the bounce shooting by the strobe device 300 is fixed (hereinafter referred to as “bounce locked”). If the CCPU 101 determines that the bounce lock is not in progress (NO in S16), the process proceeds to step S18. If the CCPU 101 determines that the bounce lock is in progress (YES in S16), the process proceeds to step S17. Whether or not the bounce lock is being performed can be determined based on the state of the lock button included in the input unit 112 or the input unit 312. In addition, when this step is executed for the first time after the power switch is turned on, the specific irradiation position is not set, so that the process may proceed to step S18 even during the bounce lock.

  In step S17, the CCPU 101 determines whether or not the subject distance has changed by a predetermined value or more during the bounce lock. That is, it is determined whether or not the difference between the previous subject distance detection result and the latest subject distance detection result (the subject distance change amount) is equal to or greater than a predetermined value. The amount of change in the subject distance can be calculated based on the focus detection results and lens drive results obtained in steps S9a and S10a. If the CCPU 101 determines that the subject distance has changed by a predetermined value or more (YES in S17), the process proceeds to step S18. If the CCPU 101 determines that the subject distance has not changed by a predetermined value or more (NO in S17), the process proceeds to step S18. Proceed to S20.

  In step S <b> 18, the CCPU 101 determines whether or not to perform an operation for automatically determining an irradiation direction during bounce flash photography (hereinafter referred to as “auto bounce operation”). Whether or not to perform the auto bounce operation is determined based on the state of a switch for switching whether or not to execute the auto bounce operation included in the input unit 112 or the input unit 312, the state of the other camera body 100, or the like. The When the auto bounce operation is not executed, normal flash photography is performed. If the CCPU 101 determines that the auto bounce operation is to be executed (YES in S18), the process proceeds to step S19. If the CCPU 101 determines that the auto bounce operation is not to be executed (NO in S18), the process proceeds to step S29.

  In step S <b> 19, the CCPU 101 executes a process related to the auto bounce operation (hereinafter referred to as “bounce process”). The bounce processing can be performed by a well-known method in which the illumination direction of illumination light is calculated by the CCPU 101 or the FPU 310 and automatically driven by various drive units of the strobe device 300 during execution of auto bounce flash photography. After the bounce process is executed, the process proceeds to step S23.

  In step S20 after the determination in step S17 is NO, the CCPU 101 determines whether the posture change amount of the imaging system 10 is greater than or equal to a predetermined value based on the detection result of the posture detection circuit 140 or the posture detection circuit 360. That is, it is determined whether or not the difference between the previous posture detection result and the latest posture detection result is greater than or equal to a predetermined value. If the CCPU 101 determines that the posture change amount is equal to or greater than the predetermined value (YES in S20), the process proceeds to step S21. If the CCPU 101 determines that the posture change amount is not equal to or greater than the predetermined value (NO in S20), the process proceeds to step S21. Proceed to S23. In step S <b> 21, the CCPU 101 calculates the rotation angle of the movable unit 300 b of the strobe device 300 based on the posture information of the camera system after the change in posture so that the illumination light irradiation position does not change before the change in the posture of the camera system. . In subsequent step S <b> 22, the CCPU 101 transmits angle information indicating the rotation angle calculated in step S <b> 20 to the FPU 310. The FPU 310 drives the movable unit 300b based on the acquired angle information. The CCPU 101 stores posture information after driving the movable unit 300b in a RAM in the CCPU 101. After step S22, the process proceeds to step S23.

  When the subject distance changes greatly during bounce lock (when the determination in step S17 is YES), the effect of the reflected light from the ceiling or the like on the subject changes greatly with the irradiation position fixed. For example, in the case where the subject is a person, the irradiation position is set so that the reflected light is emitted to a person with a subject distance of 2 m. If the position is not changed, the amount of light applied to the person changes greatly. Therefore, since it is not possible to perform photographing with appropriate exposure as it is, in this embodiment, when the subject distance greatly changes during the bounce lock and the auto bounce operation is performed, the irradiation position is determined again. The process proceeds to step S19.

  In addition, when the posture of the imaging system 10 changes greatly during the bounce lock, the irradiation position changes greatly if the rotation angle of the movable unit 300b of the strobe device 300 with respect to the main body 300a is fixed. Therefore, in the present embodiment, the determination process of step S20 can be provided, and the illumination light can be appropriately irradiated to the subject through steps S21 and S22. Steps S17 and S20 are executed only when the release switch SW1 is on. That is, even if the subject distance and the posture of the imaging system 10 change greatly during bounce lock, if the release switch SW1 is off, the irradiation position is not reset and the movable unit 300b is not redriven. In this way, in a state where the possibility of photographing is small, by resetting the irradiation position and not re-driving the movable part 300b, the movable part 300b can be driven at an appropriate timing and also consumes power. Can be suppressed.

  In step S <b> 23, the CCPU 101 determines whether or not it is a mode for fixing the irradiation position at the time of bounce by the strobe device 300 (hereinafter referred to as “bounce lock mode”). The bounce lock mode is set according to an operation on the lock button of the input unit 112 or the input unit 312. It can be said that the bounce lock mode is in the state where the bounce lock mode is set. If the CCPU 101 determines that the bounce lock mode is set (YES in S23), the process proceeds to step S24. If the CCPU 101 determines that the bounce lock mode is not set (NO in S23), the process proceeds to step S25.

  In step S24, the CCPU 101 sets a known bit indicating that the bounce lock mode is set, sets the bounce lock to be in progress, and then proceeds to step S26. On the other hand, in step S25, the CCPU 101 sets a well-known bit indicating that the bounce lock mode is not set to release the bounce lock, and then proceeds to step S26. In step S <b> 26, the CCPU 101 determines whether an error has occurred in the auto bounce process. If the CCPU 101 determines that an error has occurred (YES in S26), the process proceeds to step S27. If it is determined that no error has occurred (NO in S26), the process proceeds to step S29. When an error occurs in the auto bounce process, information indicating that an error has occurred in the auto bounce process is transmitted from the FPU 310 to the CCPU 101 in the bounce process (step S19). In step S27, the CCPU 101 displays information (warning) on the display unit 113 indicating that an error has occurred in the bounce process. Such warning display may be displayed on the display unit 313 of the strobe device 300 in accordance with a command from the CCPU 101 to the FPU 310. In step S28, the CCPU 101 switches to a setting for not performing flash photography (non-flash setting) and advances the process to step S29.

  In step S8b when the determination in step S4 is NO, the CCPU 101 determines whether or not the focus adjustment mode is the AF mode, as in step S8a. If the CCPU 101 determines that the AF mode is selected (YES in S8b), the process proceeds to step S9b. If the CCPU 101 determines that the AF mode is not selected (manual mode) (NO in S8b), the process proceeds to step S29. . The process of step S9b is the same as the process of step S9a, and the process of step S10b subsequent to step S9b is the same as the process of step S10a. Therefore, description thereof is omitted here. After step S10b, the process proceeds to step S29.

  In step S <b> 29, the CCPU 101 controls the photometry circuit 106 to perform photometry, and acquires a photometry result from the photometry circuit 106. For example, when the photometry sensor of the photometry circuit 106 performs photometry in each of the divided areas, the CCPU 101 determines the brightness value of each area as an obtained photometry result as EVb (i) (i = 0 to 5). Is stored in the RAM. In step S <b> 30, the CCPU 101 controls the gain switching circuit 108 to switch the gain according to the gain setting input from the input unit 112. The gain setting is, for example, ISO sensitivity setting. In step S30, the CCPU 101 communicates with the FPU 310, and transmits, for example, gain setting information after gain switching to the FPU 310.

  In step S31, the CCPU 101 determines an exposure value (EVs) by performing an exposure calculation using a well-known algorithm based on the photometry result (the luminance value of each photometry area stored in the RAM) acquired in step S29. In step S <b> 32, the CCPU 101 determines whether a charge completion signal is received from the FPU 310. If the CCPU 101 determines that a charge completion signal has been received (YES in S32), the process proceeds to step S33. If it is determined that a charge completion signal has not been received (NO in S32), the process proceeds to step S34. . In step S33, the CCPU 101 determines exposure control values (shutter speed (Tv) and aperture value (Av)) suitable for flash photography based on the exposure value calculated in step S31. On the other hand, in step S34, the CCPU 101 determines an exposure control value suitable for non-flash photography that does not cause the flash device 300 to emit light, based on the exposure value calculated in step S31. When one of steps S33 and S34 is completed, the process proceeds to step S35.

  In step S35, the CCPU 101 determines whether or not the release button included in the input unit 112 is fully pressed and the release switch SW2 is turned on. If the CCPU 101 determines that the release switch SW2 is off (NO in S35), the process returns to step S2, and if it is determined that the release switch SW2 is on (YES in S35), the process proceeds to step S36. . Note that the processing after step S36 is processing related to flash photography. The processing related to non-flash photography is the same as the processing after step S36 except for the processing for performing the main flash, and the description thereof is omitted.

  In step S <b> 36, the CCPU 101 controls the photometry circuit 106 to perform photometry in a state where the strobe device 300 is not emitting light, and obtains a photometry result (non-light emission luminance value) when no light is emitted from the photometry circuit 106. And CCPU101 memorize | stores the luminance value at the time of non-light-emitting of each area | region as EVa (i) (i = 0-5) in RAM. In step S37, the CCPU 101 instructs the FPU 310 to perform pre-flash through the communication line SC. The FPU 310 controls the trigger circuit 303 and the light emission control circuit 304 in accordance with a command from the CCPU 101 to perform pre-light emission with a predetermined light amount. In step S <b> 38, the CCPU 101 controls the photometry circuit 106 to perform photometry in a state where the flash device 300 is pre-flashed, and obtains a photometric result (pre-emission luminance value) from the photometry circuit 106. And CCPU101 memorize | stores the brightness value at the time of pre light emission of each area | region acquired in EV as EVf (i) (i = 0-5).

  In step S39, the CCPU 101 raises the main mirror 104 prior to exposure and retracts it from the imaging optical path. In step S <b> 40, the CCPU 101 extracts the luminance value EVdf (i) of only the reflected light component of the pre-light emission based on the luminance value at the time of non-light emission and the luminance value at the time of pre-light emission, as shown in Equation 1 below. This extraction process is performed for every six areas (i = 0 to 5), for example. In step S41, the CCPU 101 acquires pre-flash information Qpre indicating the light emission amount during pre-flash from the FPU 310 via the communication line SC in step S28.

  In step S <b> 42, the CCPU 101 selects, from among the distance measurement points, the focal length information, the pre-flash information Qpre, and the content of communication with the FPU 310, which of the photometry areas the subject should have an appropriate light emission amount. The main light emission amount is calculated. In the calculation of the main light emission amount, the subject in the selected region (P) is determined to be appropriate for the pre-light emission amount based on the exposure value EVs, the subject luminance EVb, and the luminance value EVdf (p) of the pre-light emission reflected light only. The relative ratio r of the main light emission amount is calculated by the following formula 2. Here, the difference between the exposure value EVs and the extension of the subject brightness EVb is taken because the exposure when the illumination light is irradiated is controlled so as to be appropriate by adding the illumination light to the external light. is there.

  If an object with high reflectance (such as a mirror) is present within the shooting angle of view, the amount of main light emission may be calculated to be small due to an increase in the reflected light component of the pre-light emission. In order to cope with such a problem, there is known a process of performing correction to increase the calculated main light emission amount when an object having a high reflectance is detected within a shooting angle of view. However, when performing partial flash photography or bounce flash photography, high-reflectance objects are not detected, and the above-described correction is not performed. This is because during partial flash photography and bounce flash photography, even if an object with a high reflectance is present within the shooting angle of view, illumination light is not directly applied to the entire shooting angle of view. This is because the influence of the highly reflective object is small. Further, in the present embodiment, at the time of bounce flash shooting, the correction of the main flash amount according to the position of the subject existing within the shooting angle of view in the screen is not performed. In this way, it is possible to calculate the main light emission amount suitable for partial flash photography and bounce flash photography.

  In step S43, the CCPU 101 corrects the relative ratio r using the shutter speed Tv at the time of flash photography, the pre-flash emission time t_pre, and the correction coefficient c set in advance by the input unit 112, as shown in Equation 3 below. A new relative ratio r ′ is calculated. The reason why the relative ratio r is corrected using the shutter speed Tv and the pre-emission emission time t_pre is to correctly compare the photometric integration value INTp during pre-emission and the photometry integration value INTm during main emission.

  In step S44, the CCPU 101 transmits information on the relative ratio r ′ for determining the main light emission amount to the FPU 310 via the communication line SC. In step S45, the CCPU 101 issues a command to the LPU 201 so that the aperture value Av determined in step S33 is obtained, and controls the shutter 103 so that the determined shutter speed Tv is obtained.

  In step S46, the CCPU 101 instructs the FPU 310 to execute main light emission via the communication line SC. Thereby, the FPU 310 performs the main light emission based on the relative ratio r ′ transmitted from the CCPU 101. When a series of exposure operations is completed in this way, in step S47, the CCPU 101 lowers the main mirror 104 that has been retracted from the photographing optical path, and again places it obliquely in the photographing optical path.

  In step S <b> 48, the CCPU 101 amplifies the signal output from the image sensor 102 by the gain switching circuit 108 with the set gain, and converts the amplified signal into a digital signal by the A / D converter 109. The CCPU 101 performs predetermined signal processing such as white balance on the image data converted into a digital signal by the signal processing circuit 111. In step S49, the CCPU 101 stores the image data on which the signal processing has been performed in a storage device such as a flash memory (not shown), thereby ending a series of imaging processing. Therefore, in order to perform imaging again, in step S50, the CCPU 101 determines whether or not the release switch SW1 is on. If the CCPU 101 determines that the release switch SW1 is on (YES in S50), the process returns to step S35. If the CCPU 101 determines that the release switch SW1 is not on (NO in S50), the process proceeds to step S2. Return to.

  Next, processing associated with light emission in the strobe device 300 will be described including an operation for changing the posture of the light emitting unit. FIG. 4 is a flowchart of processing executed by the FPU 310 in shooting processing executed by the imaging system 10. Each process of the flowchart of FIG. 4 is realized by the FPU 310 controlling the operation of each unit constituting the strobe device 300 by the CPU developing a predetermined program stored in the ROM in the RAM. When the power switch included in the input unit 312 provided in the strobe device 300 is turned on, the FPU 310 becomes operable.

  In step S401, the FPU 310 initializes its own memory and port, reads the state of the switch included in the input unit 312 and preset input information, and performs various light emission such as how to determine the light emission amount and light emission timing. Set the mode. In step S402, the FPU 310 operates the booster circuit block 302 to charge the main capacitor 302d. In step S403, the FPU 310 stores the focal length information of the lens barrel 200 acquired from the CCPU 101 via the communication line SC in a memory (RAM, EEPROM, or the like) included in the FPU 310. At this time, if the previously stored focal length information is held, it is updated to new focal length information.

  In step S <b> 404, the FPU 310 displays information on the light emission mode set by the operation on the input unit 312, information on the focal length information acquired in step S <b> 403, and the like on the display unit 313. In step S <b> 405, the FPU 310 moves the strobe optical system 307 to the optical system driving circuit 330 so that the illumination light irradiation range is in a range corresponding to the acquired focal length information. In step S <b> 406, the FPU 310 detects the posture of the strobe device 300 using the posture detection circuit 360. In step S407, the FPU 310 detects the rotation angle of the movable portion 300b with respect to the main body portion 300a by the first bounce angle detection circuit 340a, the second bounce angle detection circuit 340c, and the third bounce angle detection circuit 340e.

  In step S408, the FPU 310 determines whether or not the light emission mode is set to the partial light emission mode. If the FPU 310 determines that the partial light emission mode is set (YES in S408), the process proceeds to step s409, and if the FPU 310 determines that the partial light emission mode is not set (entire light emission mode) (S408). NO), the process proceeds to step S412. Note that the light emission mode can be set by operating the input unit 112 or the input unit 312. In step S409, the FPU 310 determines whether execution of partial light emission has been instructed. If the FPU 310 determines that execution of partial light emission has been instructed (YES in S409), the process proceeds to step S410. If it is determined that execution of partial light emission has not been instructed (NO in S409), the process proceeds to step S414. Proceed to

  In step S410, the FPU 310 confirms whether the posture of the light emitting unit for executing partial light emission matches the current posture of the light emitting unit, and determines whether it is necessary to change the posture of the light emitting unit. When the FPU 310 determines that the posture change of the light emitting unit is necessary (YES in S410), the process proceeds to step S411. When the FPU 310 determines that the posture change of the light emitting unit is not necessary (NO in S410), the process is performed. Proceed to step S414. When the FPU 310 determines that it is necessary to change the posture of the light emitting unit, the FPU 310 calculates a driving amount around each axis necessary for the rotation of the light emitting unit, and stores it in its own RAM. In step S411, the FPU 310 drives the first bounce drive circuit 340b, the second bounce drive circuit 340d, and the third bounce drive circuit 340f based on the drive amount calculated in step S410, and then the process proceeds to step S410. return.

  In step S412, the FPU 310 determines whether execution of an auto bounce operation is instructed. When the execution of the auto bounce operation is instructed (YES in S412), the FPU 310 advances the process to step S413. When the execution of the auto bounce operation is not instructed (NO in S412), the FPU 310 advances the process to step S414. In step S413, the FPU 310 performs an auto bounce operation in the bounce process in step S19.

  In step S414, the FPU 310 transmits current position information indicating the rotation angle of the movable part 300b with respect to the main body part 300a after the auto bounce operation to the CCPU 101. In step S415, the FPU 310 determines whether or not the charging of the main capacitor 302d is completed based on whether or not the charging voltage is equal to or higher than a predetermined value. If FPU 310 determines that charging is complete (YES in S415), the process proceeds to step S416, and if it is determined that charging is not complete (NO in S415), the process proceeds to step S419.

  In step S416, the FPU 310 transmits a charge completion signal to the CCPU 101. In step S417, the FPU 310 determines whether or not a signal (light emission command) for starting light emission is received from the CCPU 101. If the FPU 310 determines that a light emission command has been received (YES in S417), the process proceeds to step S418. If the FPU 310 determines that a light emission command has not been received (NO in S417), the process returns to step S402. In step S418, the FPU 310 controls the light emission control circuit 304 according to the received light emission command to cause the discharge tube 305 to emit light, and returns the process to step S402 after the light emission ends. In step S418, for a series of light emission such as the pre-flash for dimming and the main light emission, control is performed so that the process returns to step S402 after the end of the series of light emission without returning to step S402 even if each light emission ends. Is done. In step S419, the FPU 310 transmits a charging incomplete signal to the CCPU 101, and then returns the process to step S402. As described above, processing associated with light emission of the strobe device 300 including bounce operation is executed.

  Next, the process of partial light emission in step S15 from the determination of the shooting scene in step S12 will be further described. FIG. 5 is a perspective view showing an example of a posture that the strobe device 300 can take. FIG. 5A is a diagram illustrating a state in which the driving amount of the movable unit 300b is 0 degrees in each of the horizontal direction, the vertical direction, and the optical axis rotation. FIG. 5B is a diagram illustrating a state in which the driving amount of the movable unit 300b is 0 degrees in the horizontal and vertical directions and 90 degrees in the optical axis rotation.

  Based on the position information of the subject within the shooting angle of view, the CCPU 101 detects, for example, a shooting scene in which a highly reflective object and a human face are detected at the same time as in the scene described with reference to FIG. A shooting scene in which the position of is close to a part of the shooting angle of view is determined. It should be noted that the photographic scene may be discriminated based on an existing photographic scene discrimination algorithm or setting from the input unit 112 or the input unit 312.

  In the case of the shooting scene of FIG. 9 described above, it is possible to cope by changing the posture of the movable unit 300b from FIG. 5A to FIG. 5B. That is, based on the photometric result obtained by the photometric circuit 106, an object and a person with high reflectivity are detected, and it is detected that the person is at a position on the left side within the shooting angle of view. At this time, for example, the shooting scene may be classified and discriminated as in the “indoor commemorative shooting mode”. After the shooting scene determination, the CCPU 101 determines the illumination light irradiation range to cover the entire person based on the detection information of the person's face position and the posture information of the movable part 300b. The CCPU 101 calculates the driving amount of the movable unit 300b based on the determined irradiation range and the current posture information of the movable unit 300b, and transmits the calculation result to the FPU 310.

  The FPU 310 drives the first bounce drive circuit 340b, the second bounce drive circuit 340d, and the third bounce drive circuit 340f based on the received drive amount, as shown in FIGS. 6 (a) and 6 (b). In this way, the illumination light is irradiated toward the person. By automatically driving the bounce circuit 340 in this way, it is possible to determine the irradiation range without taking the eyes off the viewfinder, thereby eliminating the trouble of manually moving the movable part 300b and reconfirming the composition. it can. 6A and 6B show the same shooting scene. FIG. 6A is a view of the subject as viewed from the front (from the imaging system 10), and FIG. It is the figure which looked at the photographic subject and imaging system 10 from the upper part. The shooting scene in FIG. 6A is the same as the shooting scene in FIG. In addition to the face detection, the illumination light irradiation range may be determined based on an AF distance measuring point position, an underexposed portion in a photometric distribution, or the like.

  FIG. 6C is a diagram illustrating an example of another shooting scene, and schematically illustrates a composition in which a tree-lined road and illumination are present on both sides of a person. In such a shooting scene, if the illumination light is irradiated to the entire shooting angle of view, the illumination light is also irradiated to the tree-lined road near the photographer, resulting in unnatural lighting. Therefore, the third bounce drive circuit 340f is driven to bring the movable part 300b into the state shown in FIG. 5B, and illumination light is irradiated only at the center of the shooting angle of view, thereby illuminating the tree-lined road. Natural lighting that avoids light irradiation can be realized. Note that the third bounce drive circuit 340f can change the irradiation angle freely depending on the shooting scene, as well as the 90-degree drive, and thereby can perform effective lighting.

  Next, in addition to driving the movable part 300b in the above-described steps S410 and S411, control for performing a process of changing the irradiation range by driving the strobe optical system 307 regardless of the focal length of the lens barrel 200. explain.

  FIG. 7A is a diagram schematically showing a bright indoor shooting scene into which sunlight is inserted. FIG. 7B is a diagram schematically illustrating night scene shooting with the theme park in the background. In the shooting scene of FIG. 7 (a), the shadow is a person on the left side due to backlight, but if the illumination light is irradiated to the entire shooting angle of view for shadow removal, Illumination light is reflected, resulting in unnatural lighting. Further, in the shooting scene of FIG. 7B, it is desired to irradiate light on the person at the left end by slow sync shooting, but the wall near the subject (person) is also irradiated, resulting in unnatural lighting. End up.

  FIG. 8A is a diagram for explaining a preferable illumination light irradiation range for the shooting scene of FIG. In FIG. 8A, the illumination light is required only for the left subject, so that the above-mentioned problem can be solved by irradiating the left subject with the illumination light in a spot-like manner. . As a result, it is possible to avoid illuminating the front desk with illumination light and prevent unnatural lighting. In this case, for example, the irradiation range may be automatically determined based on the ratio of the irradiation range occupying within the shooting angle of view, such as 15% from the face detection position. In FIG. 8B, the illumination light is required only for the leftmost subject, so the illumination light is irradiated to the leftmost subject with a narrowed irradiation range. Thereby, it is possible to prevent the illumination light from being irradiated on the wall near the subject, thereby preventing unnatural lighting.

  When the process for narrowing the irradiation range is incorporated in the flowchart of FIG. 4, first, in step S410, the FPU 310 matches the posture and irradiation range of the light emitting unit for executing partial light emission with the current posture and irradiation range of the light emitting unit. It is determined whether or not. If the FPU 310 determines that it is necessary to change the posture of the light emitting unit and change the irradiation range (YES in S410), the FPU 310 advances the process to step S411, and the driving amount around each axis necessary for the rotation of the light emitting unit and the strobe optical system 307. Is calculated and stored in its own RAM. If the FPU 310 determines that it is not necessary to change the posture of the light emitting unit and the irradiation range (NO in S410), the FPU 310 advances the process to step S414.

  In step S411, the FPU 310 drives the first bounce drive circuit 340b, the second bounce drive circuit 340d, the third bounce drive circuit 340f, and the optical system drive circuit 330 based on the drive amount calculated in step S410. Thereby, the irradiation position of illumination light is determined, and the irradiation range (irradiation area) is narrowed down in a spot manner, thereby eliminating unnecessary reflection of illumination light and preventing unnatural lighting. After step S411, the process returns to step S410. Note that the arithmetic processing such as the determination of the shooting scene and the determination of the illumination light irradiation range described with reference to FIGS. 6 to 8 may be performed by the FPU 310 instead of the CCPU 101.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary. For example, the order of processing in each flowchart described in the above embodiment is an example, and the order of processing may be changed as long as there is no inconvenience. The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

100 camera body 101 CCPU (camera microcomputer)
DESCRIPTION OF SYMBOLS 112 Input part 140 Posture detection circuit 300 Strobe device 300a Main part 300b Movable part 310 FPU (strobe microcomputer)
340 Bounce circuit 360 Attitude detection circuit

Claims (8)

Imaging means;
An imaging system comprising: a light emitting unit that emits illumination light to a subject imaged by the imaging unit;
Drive means for rotating the posture of the light emitting unit at least about the optical axis of the light emitting unit;
It has a discriminating means for discriminating the shooting scene,
An imaging system comprising: a control unit that controls driving of the driving unit according to a shooting scene determined by the determining unit.   2. The imaging system according to claim 1, wherein the driving unit rotates the light emitting unit around two axes orthogonal to each other and orthogonal to the optical axis of the light emitting unit.   The imaging system according to claim 1, wherein the light emitting unit includes a changing unit that changes an irradiation range of illumination light according to a determination result by the determining unit. Detecting means for detecting the posture of the imaging system;
The control means controls the driving means and the changing means according to the attitude of the imaging system detected by the detection means to adjust the irradiation direction and irradiation range of the illumination light from the light emitting unit. The imaging system according to claim 3, wherein   The imaging system according to claim 1, wherein the determination unit determines a shooting scene based on position information of a person within a shooting angle of view by the imaging unit.   6. The imaging system according to claim 5, wherein the determination unit determines that the scene is a shooting scene in which an object having a high reflectance and a human face are simultaneously detected within a shooting angle of view.   6. The imaging system according to claim 5, wherein the determination unit determines that the scene is a shooting scene in which a person is close to a part of the shooting angle of view. An imaging system control method comprising: an imaging unit; and a light emitting unit that emits illumination light to a subject imaged by the imaging unit,
Determining the shooting scene;
Determining whether or not to irradiate illumination light to a partial range of the shooting angle of view according to the determined shooting scene;
Rotating the light emitting unit around at least the optical axis of the light emitting unit so that the partial range is irradiated with the illumination light when it is determined that the partial range is irradiated with the illumination light; ,
Adjusting the irradiation range of the illumination light to the partial range, and a method for controlling the imaging system.