JP2017129624A - Light emitting control device, control method and control program of the same, and imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To optimally control a bounce angle by accurately performing range-finding for a subject and the like at any time in bounce drive control.SOLUTION: A strobo MPU 201 is configured to: drive a strobo head unit to set an irradiation direction to a direction of a subject, and perform light emission so as to range-find a distance to a subject from the strobo to thereby obtain a subject distance; drive the strobo to set the irradiation direction to a direction of a reflector, and perform light emission so as to range-find a distance from the strobo to the reflector to thereby obtain a reflector distance. In this instance, the strobo MPU changes a driving velocity in performing drive control of the strobo head unit in accordance with a prescribed condition, and determines the irradiation direction of the light in bounce shooting in accordance with the subject distance and the reflector distance.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a light emission control device, a control method thereof, a control program, and an imaging device, and more particularly to light emission shadow control of a light emission device such as a strobe device.

  2. Description of the Related Art Conventionally, so-called bounce photography is known in which light is emitted from a strobe device (hereinafter referred to as a strobe) toward a reflector such as a ceiling, and the subject is irradiated with diffusely reflected light reflected by the reflector. In bounce shooting, the subject can be indirectly illuminated, so that it is possible to draw with soft light.

  Further, the reflected light from each of the subject and the reflector is received by a light receiving sensor provided in the strobe by pre-light emission or laser light irradiation. Based on the amount of light, an optimum bounce angle is determined so that the subject can be drawn with soft light, and the strobe irradiation direction is controlled (auto bounce drive control). By using the auto bounce drive control, the user can perform optimum bounce shooting without setting the bounce angle.

  For example, when light is emitted toward a reflector during bounce shooting, an image pickup apparatus that automatically sets the angle of the strobe light emitting unit according to the distance to the reflector and the distance to the subject. Yes (see Patent Document 1).

  Further, during auto bounce drive control, the drive control in the range where the rotation angle exceeds the predetermined threshold is limited rather than the drive control in the range where the rotation angle with respect to the reference position of the strobe movable unit is equal to or less than the predetermined threshold. Such a strobe device is known (see Patent Document 2).

  When performing auto bounce drive control, auto bounce drive control is generally started by operating a button of a camera equipped with a strobe. For cameras that cannot be instructed to perform auto bounce drive control, auto bounce drive control is started by operating a button provided in the strobe.

JP-A-4-340527 Japanese Patent Laying-Open No. 2015-1730

  In Patent Document 1, for example, when auto bounce drive control is started by a button operation provided on a strobe, it is difficult to hold the imaging apparatus with both hands. For this reason, as compared with the case where auto bounce drive control is started by operating a button provided in the imaging apparatus, the imaging apparatus is more likely to be shaken. As a result, the distance measurement of the subject or the like may not be performed accurately due to the shake (that is, vibration) of the imaging apparatus in the distance measurement during the auto bounce drive control. If distance measurement of the subject or the like cannot be performed with high accuracy, it becomes difficult to optimally control the angle (bounce angle) of the strobe light emitting unit during bounce shooting.

  Accordingly, an object of the present invention is to provide a light emission control device, a control method thereof, a control program, and an imaging device that can accurately measure a subject or the like during bounce drive control.

  In order to achieve the above object, a light emission control device according to the present invention controls the light emitting device during bounce photographing in which light emitted from the light emitting device is reflected by a reflector to illuminate the subject. A light emission control device, wherein the light emitting device is driven to emit light with the irradiation direction as the direction of the subject, and a distance from the light emitting device to the subject is measured to obtain a subject distance. A distance process is performed, and the light emitting device is driven to emit light with the irradiation direction as the direction of the reflector, and a distance from the light emitting device to the reflector is measured to obtain a reflector distance. Control means for performing the distance measuring process, and determining means for determining an irradiation direction of light at the time of the bounce photographing according to the subject distance and the reflector distance, and the control means is predetermined. Depending on the conditions And changes the driving speed when driving and controlling the light emitting device.

  An image pickup apparatus according to the present invention includes an image pickup unit that picks up an image of the subject through an image pickup optical system to obtain an image, and the light emission control device.

  The control method according to the present invention is a control method of a light emission control device that controls the light emission device during bounce shooting in which light emitted from the light emission device is reflected by a reflector to illuminate the subject and perform shooting. , Driving the light emitting device to emit light with the irradiation direction as the direction of the subject, and performing a first distance measuring process to obtain a subject distance by measuring the distance from the light emitting device to the subject, A second distance measurement process is performed in which the light emitting device is driven to emit light with the irradiation direction as the direction of the reflector, and the distance from the light emitting device to the reflector is measured to obtain the reflector distance. A control step, and a determination step for determining an irradiation direction of light at the time of the bounce shooting according to the subject distance and the reflector distance, and in the control step, according to a predetermined condition, And changes the driving speed in driving control of the optical device.

  The control program according to the present invention is a control program used in a light emission control device that controls the light emitting device at the time of bounce shooting in which light emitted from the light emitting device is reflected by a reflector to illuminate the subject to perform shooting. Then, the computer included in the light emission control device drives the light emitting device to emit light with the irradiation direction as the direction of the subject, and measures the distance from the light emitting device to the subject to determine the subject distance. The first distance measurement processing to be obtained is performed, and the light emitting device is driven to emit light with the irradiation direction as the direction of the reflector, and the distance from the light emitting device to the reflector is measured to obtain a reflector. A control step for performing a second distance measurement process for obtaining a distance, and a determination step for determining an irradiation direction of light at the time of the bounce photographing according to the subject distance and the reflector distance It is executed, and in the control step, and changing the drive speed at the time of driving and controlling the light-emitting device according to a predetermined condition.

  According to the present invention, it is possible to accurately measure a subject or the like during bounce drive control.

It is a perspective view which abbreviate | omits a lens unit and shows an example of the imaging device with which the light emission control apparatus by embodiment of this invention is used from the front side. It is the figure which looked at an example of the strobe with which the camera shown in FIG. 1 is mounted | worn from the upper side. FIG. 3 is a diagram for explaining an operation for starting an auto bounce distance measuring operation performed with the strobe shown in FIG. 2 attached to the camera shown in FIG. 1, and (a) shows an auto performed using a button on the camera side. FIG. 5B is a diagram showing a start operation of a bounce distance measurement operation, and FIG. 5B is a diagram showing a start operation of an auto bounce distance measurement operation performed using a switch on the strobe side. It is a block diagram which shows the example about the structure of the camera shown in FIG. FIG. 3 is a block diagram showing a configuration of an example of a strobe shown in FIG. 2. 5 is a flowchart for explaining an example of a photographing process performed by the camera shown in FIG. 6 is a flowchart for explaining strobe control (bounce control) performed by the strobe shown in FIG. 5. 6 is a flowchart for explaining another example of strobe control (bounce control) performed by the strobe shown in FIG. 5.

  Hereinafter, an example of a light emission control device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an example of an imaging device using a light emission control device according to an embodiment of the present invention from the front side with a lens unit omitted.

  The illustrated imaging apparatus is, for example, a digital camera (hereinafter simply referred to as a camera) 100, and a lens unit (imaging optical system) is attached to the camera 100 via a lens mount. The camera 100 communicates with the lens unit via the lens mount contact 303. In addition, the camera 100 is provided with a release button 301 and a narrowing down start button 302. When the camera 100 is equipped with a strobe device corresponding to auto bounce drive control (hereinafter simply referred to as a strobe), the user turns on the aperture start button 302 to turn on the strobe head portion described later. Distance measurement can be performed at an angle (referred to as auto bounce distance measurement operation).

  FIG. 2 is a view of an example of the strobe attached to the camera shown in FIG. 1 as viewed from above.

  As shown in the figure, a bounce mode switching switch 401 for switching the bounce mode and an auto bounce start switch 402 are arranged on the top surface of the strobe 120. When the bounce mode changeover switch 401 sets the auto bounce enabled state and the auto bounce start switch 402 is turned on, the head portion of the strobe can be positioned at a predetermined angle for distance measurement.

  FIG. 3 is a diagram for explaining the start operation of the auto bounce distance measuring operation performed with the strobe shown in FIG. 2 attached to the camera shown in FIG. FIG. 3A is a diagram showing a start operation of an auto bounce distance measurement operation performed using a button on the camera side, and FIG. 3B is an auto bounce distance measurement performed using a switch on the flash side. It is a figure which shows operation start operation.

  As shown in FIG. 3A, when the user operates the aperture start button 302 provided on the camera 100 to start the auto bounce distance measuring operation, the user holds the camera 100 with both hands and starts the aperture start button 302. Can be operated. On the other hand, as shown in FIG. 3B, when operating the bounce mode switching switch 401 and the auto bounce start switch 402 provided in the strobe 120, the camera 100 is held with one hand and the other hand is held. It is necessary to perform the operation. For this reason, the camera 100 may be shaken in the state shown in FIG.

  FIG. 4 is a block diagram showing an example of the configuration of the camera shown in FIG.

  The camera 100 has a microcontroller (camera MPU) 101, and the camera MPU 101 controls the camera 100 by executing a shooting sequence and the like. The image sensor 103 is, for example, a CCD or CMOS sensor, and outputs an electrical signal (analog signal) corresponding to a subject image formed through a lens unit (not shown). The analog signal is converted into a digital image signal (image data) by the A / D converter 104. The timing generation circuit 102 generates a timing signal for operating the image sensor 103 and the A / D converter 104.

  The memory controller 105 controls reading / writing of the memory and refresh operation of the buffer memory 106. Then, the memory controller 105 temporarily stores the image data in the buffer memory 106. The image data stored in the buffer memory 106 is displayed on the image display unit 107 as an image under the control of the camera MPU 101. Further, the camera MPU 101 controls the memory controller 105 to record the image data stored in the buffer memory 106 on the recording medium 109 via the recording medium I / F (interface) 108. As the recording medium 109, for example, a memory card or a hard disk is used.

  During the exposure operation, the camera MPU 101 drives a motor (not shown) by the motor control unit 110 to raise or lower a mirror (not shown) and charge the shutter. Further, the camera MPU 101 performs an exposure operation by running the curtain while the shutter control unit 111 cuts off the energization of the shutter front curtain and the shutter rear curtain.

  The photometry unit 112 includes a multi-division photometry sensor 113, and the multi-division photometry sensor 113 has a sensor area (screen) divided into a plurality of areas. Then, the photometric unit 112 outputs the luminance value for each area of the multi-division photometric sensor 113 to the camera MPU 101 as a luminance signal. The camera MPU 101 A / D converts the luminance signal by an A / D converter (not shown) to obtain a digital luminance signal, and based on the digital luminance signal, AV (aperture value), TV (shutter speed), and Photometric calculation for obtaining ISO (sensitivity of imaging device) and the like is performed.

  Similarly, the photometry unit 112 outputs a luminance signal (pre-emission luminance signal) obtained when preliminary (pre) light emission is performed using the external strobe 120 or the built-in strobe light 120 to the camera MPU 101. Then, the camera MPU 101 obtains the main light emission amount (main light emission amount) of the strobe at the time of shooting.

  The lens control unit 114 communicates with the lens unit via the lens mount contact 303 under the control of the camera MPU 101. Then, the lens control unit 114 drives and controls a lens drive motor and a lens aperture motor (both not shown) to perform focus adjustment and aperture control.

  The focus detection unit 115 detects a defocus amount related to a subject for performing AF (autofocus) under the control of the camera MPU 101. The posture detection unit 116 detects the tilt of the camera 100 with respect to the direction of gravity and also detects the tilt of the camera with respect to the rotation direction about the optical axis of the lens unit. The switch operation unit 117 sends a first stroke signal to the camera MPU 101 when the release button 301 shown in FIG. In response to the first stroke signal, the camera MPU 101 starts AF and photometry. When the release button 301 shown in FIG. 1 is fully pressed, the switch operation unit 117 sends a second stroke signal to the camera MPU 101. As a result, the camera MPU 101 starts an exposure operation.

  Note that the operation of the release button 301, the operation of the aperture start button 302 shown in FIG. 2, and the operation of other operation members are detected by the switch operation unit 117, and the switch operation unit 117 sends the detection result to the camera MPU 101.

  Under the control of the camera MPU 101, the strobe control unit 118 performs a light emission process that instructs the external strobe 120 or the built-in strobe 119 to indicate a light emission pattern (pre-flash instruction or main light emission instruction), main light emission amount, and the like. Further, the strobe control unit 118 performs switching control for switching between the built-in strobe 119 and the external strobe 120 at the time of flash photography. Note that communication between the camera MPU 101 and the external strobe 120 is performed via the strobe controller 118.

  FIG. 5 is a block diagram showing the configuration of an example of the strobe (external strobe) shown in FIG.

  The strobe 120 has a strobe main body portion and a strobe head portion, and the strobe head portion is rotatable in the horizontal direction and the vertical direction with respect to the strobe main body portion. The strobe main unit includes a strobe MPU 201, a head drive control unit 204, an attitude detection unit 205, a bounce angle calculation unit 206, a switch operation unit 207, and a camera connection unit 208. The strobe main unit, that is, the strobe 120 is connected to the camera 100 by the camera connecting unit 208. The strobe MPU 201 performs a light emission control sequence and a sequence for determining the angle of the strobe head unit.

  The strobe head unit includes a light emitting unit 202 and a distance measuring photometric unit 203, and the light emitting unit 202 includes a strobe light emitting circuit that emits strobe light in response to a light emission instruction signal supplied from the strobe MPU 201. The distance measuring photometry unit 203 receives the reflected light reflected by the object to be measured by the strobe light emitted from the light emitting unit 202 by the distance measuring photometry sensor. Then, the distance measuring photometry unit 203 outputs a luminance signal indicating the luminance value of the reflected light to the strobe MPU 201.

  The strobe MPU 201 converts the luminance signal into a digital luminance signal by an A / D converter (not shown), and calculates a distance (distance measurement distance) according to the luminance value indicated by the digital luminance signal. The head drive control unit 204 drives the motor under the control of the strobe MPU 201 to rotate the strobe head unit in the horizontal and vertical directions with respect to the strobe body unit. Then, the head drive control unit 204 outputs the relative position of the strobe head unit to the strobe body unit to the strobe MPU 201 in accordance with the rotation amount (that is, the drive amount).

  The posture detection unit 205 detects the inclination of the strobe main body with respect to the direction of gravity and also detects the inclination of the strobe main body with respect to the rotation direction about the optical axis of the lens unit. Under the control of the flash MPU 201, the bounce angle calculation unit 206 is based on the distance measurement target distance obtained by the distance measurement by the distance measurement photometry unit 203 and the inclination detected by the posture detection 205, and the flash bounce shooting An optimum bounce angle indicating an optimum angle of the head portion is obtained.

  As described above, the flash MPU 201 communicates with the camera MPU 101 via the camera connection unit 208. When the aperture start button 302 is operated in the camera 100, an auto bounce drive start instruction is notified from the camera MPU 101 to the flash MPU 201 via the camera connection unit 208, and the flash MPU 201 uses the distance measuring photometry unit 203. To measure the distance.

  FIG. 6 is a flowchart for explaining an example of a photographing process performed by the camera shown in FIG. In the following description, the case of causing the external strobe 120 to emit light will be described as an example.

  Camera MPU 101 determines whether or not half-press of release button 301 (ON of SW1) is detected in switch operation unit 117 (step S501). If SW1 is OFF (NO in step S501), camera MPU 101 stands by. On the other hand, when SW1 is turned on (YES in step S501), camera MPU 101 performs AF and photometry using lens control unit 114 and photometry unit 112 (step S502: AE / AF). Then, the camera MPU 101 sends an auto bounce instruction to the external strobe 120 by the strobe control unit 118 (step S503).

  Subsequently, the camera MPU 101 determines whether or not the switch operation unit 117 detects that the release button 301 is fully pressed (SW2 is turned on) (step S504). If SW2 is OFF (NO in step S504), camera MPU 101 stands by. On the other hand, when SW2 is turned on (YES in step S504), the camera MPU 101 determines whether or not an auto bounce end notification has been received from the external strobe 120 (step S505).

  If the auto bounce completion notification is not received (NO in step S505), the camera MPU 101 returns to the process of step S504. On the other hand, when the auto bounce completion notification is received (YES in step S505), the camera MPU 101 performs strobe shooting control for shooting with the flash emitted (step S506).

  In the flash photography control in step S506, the camera MPU 101 instructs the flash control unit 118 to perform preliminary (pre) light emission. Accordingly, the light emission control unit 118 sends a pre-flash instruction to the external strobe 120 to perform pre-flash with a predetermined light amount. When receiving the pre-flash instruction, the flash MPU 201 controls the light emitting unit 202 to perform flash pre-flash.

  As described above, the camera MPU 101 obtains the strobe main light emission amount (main light emission amount) at the time of shooting according to the luminance signal obtained as a result of the pre-light emission. Then, the camera MPU 101 instructs the light emission control unit 118 to perform main light emission for performing main light emission with the strobe main light emission amount. As a result, the light emission control unit 118 sends a main light emission instruction that instructs the external strobe 120 to perform main light emission at the strobe main light emission amount. When receiving the main light emission instruction, the flash MPU 201 controls the light emitting unit 202 to perform the main flash emission with the main flash light emission amount.

  The camera MPU 101 performs an exposure operation (photographing) at predetermined exposure values (AV, TV, and ISO) in synchronization with the main flash light emission. After the exposure operation ends, the camera MPU 101 displays an image corresponding to the obtained image data on the image display unit 107 and records the image data on the recording medium 109. Then, the camera MPU 101 ends the shooting process.

  FIG. 7 is a flowchart for explaining an example of strobe control (bounce control) performed by the strobe shown in FIG.

  First, the flash MPU 201 determines whether or not the full auto bounce mode (AIB-F) is set by the bounce mode changeover switch (bounce mode SW) 401 (step S601). If AIB-F is not set (NO in step S601), strobe MPU 201 waits. When AIB-F is set (YES in step S601), the flash MPU 201 determines whether or not to perform an auto bounce drive operation on the camera 100 side (whether or not it is a predetermined condition) ( Step S602). Here, when an auto bounce drive start operation is notified from the camera 100 in accordance with the operation of the narrow-down button 302, the flash MPU 201 determines to perform an auto bounce drive operation on the camera 100 side. On the other hand, when the auto bounce start switch 402 is operated, the strobe MPU 201 determines to perform an auto bounce drive operation on the external strobe 120 side.

  When operating the narrow-down button 302, the user's operating posture is, for example, as shown in FIG. In this case, since the user can hold the camera 100 with both hands, camera shake can be reduced. On the other hand, when operating the auto bounce start switch 402, the user's operation posture is, for example, as shown in FIG. In this case, since the user holds the camera 100 with one hand, the camera 100 becomes unstable and tends to be shaken.

  If it is determined that an auto bounce drive operation is to be performed on the external strobe 120 side (NO in step S602), the strobe MPU 201 performs a bounce low speed drive setting in which the strobe head unit drive speed is the first speed (step S603). On the other hand, if it is determined that an auto bounce drive operation is to be performed on the camera 100 side (YES in step S602), the flash MPU 201 sets a bounce high speed drive setting in which the strobe head unit drive speed is set to a second speed higher than the first speed. This is performed (step S604).

  After the processing of step S603 or S604, the strobe MPU 201 controls the subject distance measurement drive so that the head drive control unit 204 drives and controls the strobe head unit at the strobe head unit drive speed so that the light emitting unit 202 faces the front (that is, the subject direction). Is performed (step S605). Then, as described above, the flash MPU 201 controls the light emitting unit 202 to perform pre-light emission with a predetermined light amount (step S606: front pre-light emission). As a result, the flash MPU 201 receives the reflected light reflected by the subject to be measured by the pre-flash by the ranging photometry unit 203 and, as described above, the distance to the subject (subject (Distance) is obtained (first distance measurement process).

  Subsequently, the strobe MPU 201 sets the bounce drive speed, which is the strobe head drive speed, to the bounce high-speed drive setting (step S607). Then, the strobe MPU 201 performs ceiling ranging drive control for driving the strobe head unit in the ceiling direction that is the direction of the reflector at the bounce drive speed set in step S607 by the head drive control unit 204 (step S608).

  Next, the flash MPU 201 controls the light emitting unit 202 to perform pre-light emission with a predetermined light amount toward the ceiling (step S609: ceiling pre-light emission). Accordingly, the flash MPU 201 receives the reflected light reflected from the ceiling, which is the object of distance measurement, by the pre-emission by the distance measuring light measuring unit 203, and the distance to the ceiling (ceiling distance: reflector distance) according to the luminance signal. (Second distance measurement process).

  Subsequently, the flash MPU 201 obtains a bounce angle that is an optimal angle of the flash head unit based on the subject distance and the ceiling distance (step S610). Since the calculation of the optimum bounce angle is known, detailed description thereof is omitted here. The strobe MPU 201 controls the head drive control unit 204 to perform optimum bounce angle drive control for driving the strobe head unit to the position of the optimum bounce angle (step S611).

  Subsequently, the flash MPU 201 determines whether or not there is a light emission instruction from the camera 100 (step S612). Here, if the pre-flash instruction or the main flash instruction and the flash amount are transmitted from the camera 100, the flash MPU 201 determines that the flash instruction has been issued. If there is no light emission instruction (YES in step S612), strobe MPU 210 stands by. On the other hand, when there is a light emission instruction (YES in step S612), the flash MPU 210 performs light emission by controlling the light emitting unit 202 with the light emission amount instructed according to the pre-light emission instruction or the main light emission instruction (step S613).

  Subsequently, the flash MPU 201 determines whether or not the light emission instruction is main light emission (step S614). If the light emission instruction is pre-light emission (NO in step S614), strobe MPU 201 returns to the processing in step S612 to continue the main light emission control. On the other hand, if the light emission instruction is main light emission (YES in step S614), strobe MPU 201 ends the strobe control.

  In this way, the bounce drive speed is changed according to whether the camera side or strobe side performs auto bounce drive operation, so camera shake during auto bounce drive is reduced and subject distance is reduced. It is possible to reduce an error in measuring the distance.

  FIG. 8 is a flowchart for explaining another example of strobe control (bounce control) performed by the strobe shown in FIG.

  First, the flash MPU 201 determines whether or not AIB-F is set in the same manner as the processing in step S601 in FIG. 7 (step S701). If AIB-F is set (YES in step S701), strobe MPU 201 determines whether or not an auto bounce drive start operation has been performed (step S702). If the auto bounce drive start operation is not performed (NO in step S702), strobe MPU 201 waits. On the other hand, when an auto bounce drive start operation is performed (YES in step S702), strobe MPU 201 performs ceiling ranging drive control described in step S608 of FIG. 7 at a predetermined bounce drive speed (step S703). ). Thereafter, the flash MPU 201 performs the ceiling pre-light emission described in step S609 in FIG. 7 (step S704), and obtains the ceiling distance.

  Subsequently, the strobe MPU 201 determines whether or not the strobe 120 has a shake (blur) of a predetermined amount (value) or more during the ceiling distance measurement drive control based on the attitude detection result by the attitude detection unit 205 (step) S705). If the shake is less than the predetermined amount (NO in step S705), the flash MPU 201 performs the bounce high-speed drive setting described in step S604 of FIG. 7 (step S706). On the other hand, if the shake is greater than or equal to the predetermined amount (YES in step S705), the flash MPU 201 performs the bounce low-speed drive setting described in step S603 of FIG. 7 (step S707).

  After the processing in step S706 or S707, the flash MPU 201 performs subject distance measurement drive control described in step 605 in FIG. 7 (step S708), and then performs front pre-light emission described in step S606 in FIG. S709). In steps S710 to S714, the flash MPU 201 performs the processes of steps S610 to S614 described with reference to FIG. 7, and ends the flash control.

  As described above, first, the ceiling distance measurement drive control is performed, and if the amount of shake during the ceiling distance measurement drive control is large, the bounce drive speed during the subject distance measurement drive control is set to a low speed. That is, when the amount of blurring during the ceiling distance measurement drive control is large, the amount of blurring during the subject distance measurement drive control is also large, and the bounce drive speed is set to a low speed. As a result, camera shake during auto bounce driving is reduced, and errors in measuring the subject distance can be reduced.

  As is clear from the above description, in the example shown in FIG. 4, the strobe MPU 201, the head drive control unit 204, the attitude detection unit 205, the light emitting unit 202, and the distance measuring photometry unit 203 function as a first control unit. The strobe MPU 201 functions as a determination unit. The bounce angle calculation unit 206, the head drive control unit 204, and the strobe MPU 201 function as a second control unit.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to these embodiment, Various forms of the range which does not deviate from the summary of this invention are also contained in this invention. .

  For example, the function of the above embodiment may be used as a control method, and the control method may be executed by the light emission control device. Further, a program having the functions of the above-described embodiments may be used as a control program, and the control program may be executed by a computer included in the light emission control device. The control program is recorded on a computer-readable recording medium, for example.

[Other Embodiments]
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.

101 Camera MPU
112 Metering unit 117 Switch operation unit 118 Strobe control unit 120 External strobe 201 Strobe MPU
202 Light Emitting Unit 203 Distance Metering Unit 204 Head Drive Control Unit 206 Bounce Angle Calculation Unit

Claims (10)

A light emission control device that controls the light emitting device during bounce shooting in which light emitted from the light emitting device is reflected by a reflector to illuminate the subject to perform shooting,
The light emitting device is driven to emit light with the irradiation direction as the direction of the subject, and a first distance measurement process for obtaining a subject distance by measuring a distance from the light emitting device to the subject is performed. A second distance measurement process is performed in which the light emitting device is driven to emit light with the irradiation direction as the direction of the reflector, and the distance from the light emitting device to the reflector is measured to obtain the reflector distance. 1 control means;
Determining means for determining an irradiation direction of light at the time of the bounce shooting according to the subject distance and the reflector distance;
The light emission control device characterized in that the first control means changes a driving speed when driving the light emitting device according to a predetermined condition.   The light emitting device includes a first operation unit for performing a bounce drive operation for performing the bounce shooting, and the bounce drive operation is performed by the first operation unit as the predetermined condition. When performed, the first control means performs the second distance measuring process after performing the first distance measuring process with the driving speed as a predetermined first speed. Item 2. The light emission control device according to Item 1.   The imaging apparatus includes a second operation unit for performing a bounce drive operation for performing the bounce shooting, and the bounce drive operation is performed by the second operation unit as the predetermined condition. 3. The light emission control device according to claim 2, wherein, when performed, the first control unit sets the driving speed to a second speed higher than the first speed. 4.   When there is a bounce driving operation for performing the bounce shooting, the first control unit performs the second distance measurement process, and the predetermined distance is determined in the second distance measurement process. 2. The light emission control device according to claim 1, wherein when the shake of the light emitting device is equal to or greater than a predetermined amount, the first distance measurement processing is performed with the driving speed as a predetermined first speed.   The first control means sets the driving speed as a second speed higher than the first speed when the blur of the light emitting device during the second distance measuring process is less than a predetermined amount. The light emission control device according to claim 4, wherein the distance measurement processing of 1 is performed.   The light emission control device according to claim 1, wherein a direction of the reflector is a ceiling direction.   A second control unit configured to drive and control the light emitting device so that the light emitting device emits light so that an irradiation direction of the light emitting device becomes the irradiation direction determined by the determining unit when performing the bounce photographing; The light emission control device according to any one of claims 1 to 6. Imaging means for obtaining an image by imaging the subject through an imaging optical system;
The light emission control device according to any one of claims 1 to 7,
An imaging device comprising: A control method of a light emission control device for controlling the light emitting device during bounce shooting in which light emitted from the light emitting device is reflected by a reflector to illuminate the subject to perform shooting,
The light emitting device is driven to emit light with the irradiation direction as the direction of the subject, and a first distance measurement process for obtaining a subject distance by measuring a distance from the light emitting device to the subject is performed. Control for performing second distance measurement processing for driving the light emitting device to emit light with the irradiation direction as the direction of the reflector, and measuring the distance from the light emitting device to the reflector to obtain the reflector distance Steps,
Determining a light irradiation direction in the bounce shooting according to the subject distance and the reflector distance;
In the control step, a driving speed when driving the light-emitting device is changed according to a predetermined condition. A control program used in a light emission control device that controls the light emitting device during bounce shooting in which light emitted from the light emitting device is reflected by a reflector to illuminate the subject to perform shooting,
A computer included in the light emission control device,
The light emitting device is driven to emit light with the irradiation direction as the direction of the subject, and a first distance measurement process for obtaining a subject distance by measuring a distance from the light emitting device to the subject is performed. Control for performing second distance measurement processing for driving the light emitting device to emit light with the irradiation direction as the direction of the reflector, and measuring the distance from the light emitting device to the reflector to obtain the reflector distance Steps,
A determination step of determining an irradiation direction of light at the time of the bounce shooting according to the subject distance and the reflector distance;
In the control step, a control program for changing a driving speed when driving the light emitting device according to a predetermined condition.

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