JP2010113223A - Imaging device, stroboscopic system, and light emission control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stroboscopic system that causes no operation problem due to difference in attitude of a light emitting section when a lighting system mounting the light emitting section at an arbitrary attitude is mounted in the imaging device. <P>SOLUTION: The stroboscopic system includes: the imaging device (1) on which an imaging lens (50) is mounted or included, and the lighting system (61) mounting the light emitting section (64) having a light source for illuminating a subject at an arbitrary attitude to the imaging device (1). The stroboscopic system includes a light emitting section attitude determining means that select a part of the light source of the light emitting section (64) to emit light, acquires subject luminance distribution information at light emission using a camera, and determines the attitude of the light emitting section based on the subject luminance distribution information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging device and a strobe system including the imaging device and a flash device.

  In a conventional flash device, a flash device in which a ring-shaped light emitting portion is mounted on the tip of a photographing lens of a camera, a so-called ring light, has a plurality of light sources capable of independently controlling the respective light amounts in the light emitting portion. Among such ring lights, there is also known one that can adjust the balance of the amount of light applied to the subject and adjust the shadow appearance of the subject.

Japanese Patent Laid-Open No. 2004-133830 uses a pair of xenon tube light sources arranged in the left-right direction as shown in 101 and 102 in FIG. A flash device that performs ratio control is disclosed. FIG. 18 is a screen showing a setting state of the light amount ratio of the left and right light sources displayed on the display unit of the flash device in Patent Document 1, and the light amount ratio of the left and right light sources is between 8: 1 and 1: 8. It can be set with.
JP 2000-215574 A

  However, the normal mounting posture when the flash device of Patent Document 1 is mounted on the front end of the photographing lens of the camera is a posture in which the projection 64b of the flash device is upward as shown in FIG. 14, but as shown in FIG. It is also possible to mount the projecting portion 64b of a simple flash device in a lateral orientation. For example, when the connecting cord 63 is in the way when the camera is operated, it is conceivable that the projection 64b of the flash device as shown in FIG. Therefore, when mounted in a posture other than the normal mounting posture as shown in FIG. 15, even if the light quantity ratio of the left and right light sources is set on the screen displayed in FIG. Since they are arranged side by side, the flash device does not emit light as intended by the photographer.

  Also, unlike the flash device of Patent Document 1, in a ring-shaped flash device having light sources at four points on the top, bottom, left and right, the same problem can be obtained when the light amount ratio of the upper and lower light sources can be set as well as the light amount ratio of the upper and lower light sources Occurs. In the case of a ring-shaped flash device with light sources at four points, top, bottom, left, and right, the position where the light source of the flash device exists does not change between the normal mounting posture and the horizontal mounting posture, but the photographer sets the right and left light intensity ratio Even so, the flash device emits light by controlling the upper and lower light quantity ratio.

  As described above, when the ring-shaped flash device is mounted on the imaging device in a posture other than the normal mounting posture, the correspondence between the light amount ratio set by the photographer and the light amount ratio at the time of actual light emission is It is difficult to understand and it is troublesome to set the light quantity ratio in consideration of the correspondence.

  SUMMARY An advantage of some aspects of the invention is that it provides an imaging device and a strobe system that can perform light emission control of the flash device as intended by the photographer regardless of the mounting posture of the flash device with respect to the imaging device.

  In order to achieve the above object, an imaging apparatus of the present invention is an imaging apparatus capable of mounting a flash device having a plurality of light emitting regions in an arbitrary mounting posture, and a calculation means for calculating a luminance distribution of a subject, Based on the luminance distribution of the subject calculated by the calculation means, a determination means for determining a mounting posture of the flash device with respect to the imaging device, and a light emission amount of each of the light emitting areas is determined based on a result of the determination means. And a light emission control means.

  The strobe system of the present invention is a strobe system comprising a flash device having a plurality of light emitting areas and an imaging device capable of mounting the flash device in an arbitrary mounting posture, and a calculating means for calculating a luminance distribution of a subject. A determination unit that determines a mounting posture of the flash device with respect to the imaging device based on the luminance distribution of the subject calculated by the calculation unit; and a light emission amount of each of the light emitting regions is determined based on a result of the determination unit And a light emission control means.

  According to the present invention, the light emission control of the flash device can be performed as intended by the photographer regardless of the mounting posture of the flash device with respect to the imaging device.

(First embodiment)
FIG. 1 is a perspective view showing a close-up strobe, a so-called ring light, which is a flash device according to an embodiment of the present invention. FIG. 2 is a perspective view of a single-lens reflex digital camera (hereinafter referred to as a camera) according to an embodiment of the present invention, in which a photographing lens 50 is attached.

  As shown in FIG. 1, the ring light 61 is divided into a control unit 62 that is directly attached to the camera and a light emitting unit 64 that is attached to the tip of the photographing lens 50. Electrical connection. The control unit 62 is mechanically and electrically connected to the camera by inserting the leg portion 68 into the upper shoe 4 of the camera.

  The front surface of the light emitting section 64 is a light emitting surface 65 that surrounds the optical axis of the photographing lens 50. A plurality of white LEDs arranged in a ring shape as light sources are provided inside the light emitting surface 65. The white LED group arranged in a ring shape is divided into 12 light emitting regions 70a, 70b, 70c, 70d, 70e, 70f, 70g, 70h, 70i, 70j, 70k, and 70l in the circumferential direction as shown in FIG. And each is individually controlled.

  A plurality of locking claws 66 that can swing in conjunction with the operation of the lock release button 67 protrude with an urging force on the inner periphery 64 a of the light emitting unit 64, and are formed on the entire periphery of the front end of the photographing lens 50. The light emitting portion 64 is attached to the photographing lens 50 by engaging the engaging claw 66 with the engaging groove 50a.

  As shown in FIG. 2, a release button 3 and a main dial 2 for changing setting values of photographing conditions such as a shutter speed and an aperture value are disposed on the grip 1a of the camera 1. The release button 3 is a switch having a two-stage stroke, which is a half-pressed state in which the camera 1 starts a shooting preparation operation such as photometry and distance measurement, and a full-pressed state in which the camera 1 actually executes the shooting operation.

  A preview button 5 disposed near the photographing lens 50 in front of the camera 1 is a button for executing a preview function described later.

  FIG. 3 is a rear perspective view of the camera according to the embodiment of the present invention. On the rear surface of the camera 1, there are an eyepiece window 6 of an optical finder described later, and TFTs used for displaying a GUI menu for reproducing captured images and setting various functions. A monitor 8 is arranged. A sub-dial 9 disposed beside the TFT monitor 8 is an input member that plays an auxiliary role of the main dial 2, and is also used for operating various information displayed on the TFT monitor 8. The live view button 7 is a button for operating a live view function described later.

  FIG. 5 is a block diagram showing an internal configuration of a strobe system including the camera 1 and the ring light 61 according to the embodiment of the present invention.

  A camera MPU 21 in the camera 1 is a microcomputer that controls the operation of the camera 1. The mirror control means 24, the focus detection means 23, the shutter control means 22, the image pickup circuit 25, the image processing circuit 27, the operation switch group 33, the photometry circuit 26, the TFT monitor drive circuit 28, the memory controller 30 and the like in the camera 1 are the camera MPU 21. It operates by controlling. The operation switch group 33 is an electric switch that is linked to various operation members such as the release button 3, the main dial 2, the sub dial 9, the preview button 5, and the live view button 7.

  The lens control means 55 in the photographic lens 50 is connected to the camera MPU 21 of the camera 1 via the mount contact 10 of the photographic lens 50, and the distance measuring operation and the aperture of the lens elements 52 and 53 according to the instruction of the camera MPU 21. 54 narrowing-down operation is executed.

  In the camera 1, a main mirror 11 and a sub mirror 12 that are oscillated by a mirror control means 24 are arranged. The main mirror 11 guides a subject luminous flux incident through the lens elements 52 and 53 upward, and the sub mirror 12 is a focal point. Guide to detection means 23. The subject luminous flux guided upward by the main mirror 11 is incident on an optical finder 32 composed of a focusing plate 13, a pentaprism 14, an eyepiece 15 and the like, and the subject image formed on the focusing plate 13 is an eyepiece window. 6 is observed by the photographer. At the time of photographing, the main mirror 11 is retracted from the photographing optical path, so that the subject luminous flux incident through the lens elements 52 and 53 is guided to the imaging circuit 25 described later without being reflected by the main mirror 11. Part of the light transmitted through the pentaprism 14 is incident on a photometric sensor 26 a in the photometric circuit 26.

  The photometric sensor 26a detects the luminance distribution of almost the entire area of the subject image, and the detection area is divided into a plurality of blocks 86 as shown in FIG. The luminance information for each block is output from the photometry circuit 26 to the camera MPU 21, and the camera MPU 21 calculates the exposure amount at the time of photographing based on the obtained luminance information.

  The main mirror 11 transmits a part of the subject luminous flux, and the transmitted light is reflected by the sub mirror 12 and guided to the focus detection means 23. The focus detection unit 23 uses a known phase difference type focus detection unit, and includes at least a pair of secondary imaging lenses, a diaphragm, a line sensor, a signal processing circuit, and the like. The focus detection unit 23 sends the calculation result by the phase difference detection method to the camera MPU 21 based on a pair of secondary image signals having a phase difference re-imaged on the line sensor, and focuses the photographing lens 50. Run the action.

  The shutter 16, which is a focal plane shutter, is opened by the shutter control means 22 that receives a command from the camera MPU 21 at the time of shooting, and causes the subject luminous flux to enter the imaging circuit 25.

  The imaging circuit 25 has an imaging sensor 25 a that is a two-dimensional imaging device using CMOS or the like, and outputs an imaging signal of a subject image formed on the imaging sensor 25 a by the imaging lens 50 to the image processing circuit 27. The image processing circuit 27 executes general hardware image processing such as A / D conversion, gamma correction, filter processing, and JPG compression on the image pickup signal to generate image data of the subject image. The generated image data is sent to the memory controller 30, and the image data is stored in the recording medium 31.

  The image processing circuit 27 compresses the image data and also generates image data for displaying the TFT monitor 8. The subject image is displayed on the TFT monitor 8 by the display image data sent to the TFT monitor drive circuit 28. Further, the image processing circuit 27 also executes a composition process for performing GUI display on the TFT monitor 8.

  A strobe MPU 69 provided in the control unit 62 of the ring light 61 communicates with the camera MPU 21 via the shoe 4. The strobe MPU 69 controls light emission control such as determination of the light emission amount and other ring light operations in accordance with a command from the camera MPU 21. Note that the light emission control such as determination of the light emission amount may be performed by the camera MPU 21, and the strobe MPU 69 may control the operation of the ring light according to a command from the camera MPU 21 based on the light emission control performed by the camera MPU 21.

  The plurality of LED arrays 71 in the light emitting unit 64 are white corresponding to the 12 light emitting regions 70a, 70b, 70c, 70d, 70e, 70f, 70g, 70h, 70i, 70j, 70k, and 70l shown in FIG. It is a light emitting element group of LED. Each LED array 71 is connected to an independent LED drive circuit 72. Each LED drive circuit 72 individually drives each LED array 71 in accordance with an instruction from the strobe MPU 69.

  Conventionally, a pair of xenon tubes that can be controlled independently by the light source of the light emitting section are arranged in the left-right direction, and a so-called light intensity ratio control function that adjusts the light intensity balance irradiated to the subject by changing the relative light intensity of each xenon tube A ring light is known.

  In the ring light 61 using the white LED in the present embodiment, for example, the light emitting area is distributed counterclockwise into two light emitting groups, that is, a light emitting group from 70a to 70f and a light emitting group from 70g to 70l. In FIG. 4, each light emitting group is arranged in the left-right direction. If the light quantity in each light emitting group is the same and the light quantity between the light emitting groups is relatively controlled, the pair of xenon tubes arranged in the left-right direction described above. A light quantity ratio control function similar to that of a conventional ring light using the can be achieved.

  Furthermore, the combinations of the light emitting areas belonging to each light emitting group are made counterclockwise to light emitting groups 70j to 70c and light emitting groups 70d to 70i, and the light quantity ratio can be controlled as a vertical arrangement. is there. That is, if a method of dividing the light emitting area into a plurality of light emitting areas using a white LED as a light source as in the present embodiment, it is possible to easily provide a ring light capable of freely changing the direction of the light amount ratio control with respect to the subject. is there.

  Information regarding the light amount ratio control function of the ring light 61 is displayed on the TFT monitor 8 as a GUI as shown in FIG. As shown in FIG. 6, the two arc-shaped lines 81a and 81b displayed on the GUI indicate the arrangement direction of the light emitting groups, and the numerical values 82a and 82b indicate the light emission amount ratios of the respective light emitting groups. It is possible to easily change the arrangement direction of the light emitting groups and the light emission amount ratio of each light emitting group by using a camera operation member such as the sub dial 9.

  When the light emitting unit 64 is attached to the photographic lens 50, the engaging claw 66 of the light emitting unit 64 is simply engaged with the engaging groove 50a of the photographic lens 50 that is the attaching unit. Can be mounted in any mounting position. In the present embodiment, the projection 64b to which the connecting cord 63 shown in FIG. 14 is attached has a normal mounting posture of the light emitting unit, but for example, as shown in FIG. You may make it equip with the camera 1 in the attitude | position facing sideways.

  If the light emitting section 64 is mounted in a normal mounting posture as shown in FIG. 14, the arrangement direction of the light emitting groups that are actually emitted toward the subject is on the TFT monitor 8 as shown in FIG. It matches the GUI display. However, if the light emitting unit is mounted in the horizontal orientation as shown in FIG. 15, there is a problem that the GUI display on the TFT monitor 8 and the arrangement direction of the light emitting groups that actually emit light toward the subject do not match. .

  Therefore, in the present embodiment, the mounting posture of the light emitting unit 64 is determined so that no operational problem occurs even if the light emitting unit 64 is not mounted on the photographing lens 50 in a normal mounting posture. Based on this, the light emitting area corresponding to each light emitting group is corrected.

  In the present embodiment, the light emitting area corresponding to each light emitting group is corrected when the live view function of the camera is operated.

  When the camera 1 is in a standby state, when the live view button 7 is pressed, the camera 1 starts a live view operation. During the live view operation, the main mirror 11 and the sub mirror 12 are in a so-called valve state in which the shutter 16 is opened while the main mirror 11 and the sub mirror 12 are retracted from the photographing optical path of the subject light flux. The imaging circuit 25 always captures the subject image, and the photographer can observe the subject image (live view display) that is sequentially displayed on the TFT monitor 8.

  The live view function is particularly effective in close-up photography that requires frequent manual focus adjustment and sufficient confirmation of the subject image. In particular, when using a ring light with a white LED that is easy to continuously emit light, if the modeling light emission is executed during the live view operation, the photographer will have the same illumination as before shooting. The subject can be confirmed.

  FIG. 7 is a flowchart showing the operation of the strobe system when the live view button 7 in this embodiment is pressed.

  When the live view button 7 is pressed (S101), the camera 1 is in a valve state under the control of the camera MPU 21 and enters a live view operation state in which the subject image is always captured and displayed (step S102). In the live view operation state, the camera MPU 21 determines whether or not the ring light 61 is attached to the camera 1 (S103). When the ring light 61 is attached, the camera MPU 21 performs a light emission group correction process for the ring light 61 (S104). If the ring light 61 is not attached, the process proceeds to step S107 while the live view operation is maintained.

  When the light emission group correction process is completed, a GUI display relating to the light amount ratio control is displayed as shown in FIG. 8 in a superimposed manner on the live view display on the TFT monitor 8 (step S105). Then, the ring light 61 starts modeling light emission controlled by the strobe MPU 69 in accordance with the arrangement direction and the light amount ratio of the light emission groups corresponding to the GUI display (S106). At this time, the photographer can observe the subject image on the TFT monitor 8 under the same illumination conditions as in actual photographing. Further, it is possible to adjust the light amount ratio in real time by operating the operation member of the camera 1.

  After the modeling flash is started, it is detected whether the live view button 7 is pressed again (S107). If the live view button 7 is pressed again, the camera MPU 21 determines whether the modeling flash is being performed (S113). ). When modeling light emission is in progress, after the modeling light emission is stopped by the flash MPU 69 (S114), the camera MPU 21 stops the live view operation (S115). When the live view operation is stopped, the camera 1 is switched from the valve state to the standby state by the camera MPU 21.

  If the live view button 7 is not pressed again in step S107, it is detected whether or not the release button 3 is pressed (S108). When the release button 3 is pressed regardless of whether the release button 3 is half-pressed or fully pressed, the camera MPU 21 determines whether or not modeling light emission is being performed (S109). When modeling light emission is in progress, after the modeling light emission is stopped by the flash MPU 69 (S110), the camera MPU 21 stops the live view operation (S111). When the live view operation is stopped, the camera MPU 21 temporarily changes the camera 1 from the valve state to the standby state, and immediately executes a shooting preparation operation such as distance measurement, photometry, or the like according to the pressed state of the release button 3. (S112).

  If pressing of the release button 3 is not detected in step S108, the process returns to step 107 again, and the live view operation is continued until it is detected that the live view button 7 or the release button 3 is pressed.

  Next, the flowchart of the light emission group correction process in S104 will be described with reference to FIGS.

  10 is a front view of the light emitting part 64 of the ring light showing each light emitting region. The light emitting part 64 in FIG. It is assumed that it is mounted on the left side). Further, since the light emitting unit 64 is ring-shaped, the position where the light emitting region exists with respect to the camera 1 is the same in the normal mounting posture shown in FIG. 4 and the horizontal mounting posture shown in FIG.

  If it is determined in S103 that the ring light 61 is mounted, the strobe MPU 69 first turns on only the light emitting areas 70l and 70a on the projection 64b side which is on the upper side in the normal mounting posture of the light emitting section 64 (step S201). Since the camera 1 is performing a live view operation, a subject image with a shadow on the right side with the light emitting areas 70l and 70a as the main light source is captured as shown in FIG. Then, the luminance distribution of the subject image is calculated by the camera MPU 21 (step S202).

  Various methods of calculating the luminance distribution are conceivable. For example, as shown in FIG. 12, the image data is divided into blocks 85 and the average luminance for each block is obtained. The calculation result, that is, the calculated luminance data for each block is temporarily stored in a predetermined storage area in the camera MPU 21. In addition, since there is a high possibility that the subject will be missing in the peripheral portion, the blocks in the range for calculating the luminance distribution may be limited to the thick line 87.

  When the luminance distribution is calculated in step S202, the flash MPU 69 lights only the light emitting areas 70c and 70d whose phases are shifted by 90 ° from the light emitting areas turned on in S201 (S203). When the light emitting areas 70c and 70d are turned on, the luminance distribution is distributed by the camera MPU 21 based on the image data of the subject image having a shadow different from that when the light emitting areas 70l and 70a are turned on as shown in FIG. Is calculated (step S204).

  In steps S205 to S208, processing similar to that in steps S201 to S204 is performed. Luminance based on the image data of FIG. 11C of the subject image when only the light emitting areas 70f and 70g are turned on and the image data of FIG. 11D of the subject image when only the light emitting areas 70i and 70j are turned on. Each distribution is calculated.

  When the luminance distribution of the image data when the light emitting areas in the four directions are turned on is calculated, the luminance distribution data calculated for each light emitting area is compared by the camera MPU 21 (S209). The comparison of the luminance distribution is performed between the light emitting areas at the symmetrical positions, and the mounting posture of the light emitting unit 64 is determined using a comparison result in which the influence of the directionality of the light source appears greatly in the difference in the luminance distribution (S210). For example, when comparing the luminance distributions when the light emitting areas 70l and 70a are lit and when the light emitting areas 70f and 70g are lit, the luminance distributions when the light emitting areas 70c and 70d are lit and when the light emitting areas 70i and 70j are lit are compared. The shadow change in the left-right direction is larger than the case. If the light emitting areas 70l and 70a, which should be light sources from the upper side with respect to the subject in a normal mounting posture, are lit, the luminance distribution of the subject image tends to have a shadow on the right side. 64 is determined to be attached to the left side when viewed from the back of the camera 1.

  Based on the determination result in step 210, the camera MPU 21 determines whether or not correction is necessary if the light emitting unit 64 is not in the normal mounting posture (S211), and if correction is necessary, the light emitting area belonging to the light emitting group. Is changed (S212).

  For example, when the arrangement direction of the set light emitting groups is the left-right direction, the combinations of the light emitting areas for which the light amount ratio is controlled are the light emitting groups 70j to 70c counterclockwise around the light emitting areas shown in FIG. To 70i combination of light emitting groups.

  As described above, when the light emitting unit 64 is not mounted on the photographing lens 50 in the normal mounting posture, the arrangement direction of the light emitting group set by the camera and the arrangement direction of the light emitting group that actually controls the light amount ratio do not match. Is corrected. That is, even when the light emitting unit 64 of the ring light 61 is not attached to the photographing lens 50 in a normal attachment posture, the arrangement direction of the light emission group set by the camera is matched with the arrangement direction of the light emission group that is actually controlled by the light amount ratio. Can do.

  Further, since the light emission group correction process is performed at the start of the live view operation, modeling light emission can be performed during the live view operation, and the subject can be confirmed in a state where illumination equivalent to that at the time of shooting is performed.

  Further, since the mounting posture of the light emitting unit 64 is determined based on the luminance distribution of the subject image when a part of the light emitting areas is turned on, the posture detection for detecting the posture of the light emitting unit 64 in the ring light 61 is performed. There is no need to mount elements and the like, and the number of parts can be reduced.

  Further, since the luminance distribution of the subject image is obtained based on the image data obtained by the imaging sensor 25a, it is not necessary to provide a dedicated luminance distribution detection sensor, and the number of parts can be reduced.

(Second Embodiment)
In the present embodiment, the light emission group correction process is executed during the preview operation of the camera 1.

  When the camera 1 is in a standby state, when the preview button 5 is pressed, the camera 1 starts a preview operation. The preview operation is an operation for narrowing the aperture of the photographing lens 50 to an arbitrary aperture value within a predetermined range, and allows the photographer to check the depth of the subject using the optical viewfinder 32. The preview operation is also effective in close-up, and if the modeling light emission of the ring light 61 is performed at the same time as the preview operation, it is possible to confirm the state in which the subject is illuminated at the same time.

  FIG. 13 is a flowchart showing the operation of the strobe system when the preview button 5 in this embodiment is pressed.

  When the preview button 5 is pressed (S301), the camera MPU 21 narrows down the photographing lens 50 (step S302). When the narrowing is performed and the preview operation state is entered, the camera MPU 21 determines whether or not the ring light 61 is attached to the camera 1 (S303). When the ring light 61 is attached, the camera MPU 21 performs a light emission group correction process for the ring light 61 (S304). If the ring light 61 is not attached, the process proceeds to step S307 while maintaining the preview operation.

  The light emission group correction process in step S304 is the same as that in the flowchart of FIG. 9 described in the first embodiment, and a description thereof will be omitted. However, when the luminance distribution is calculated, the captured subject image cannot be used unlike during the operation of the live view function. Instead, the luminance distribution of the photometric sensor 26a in the photometric circuit arranged in the optical viewfinder 32 is used. use. Since the photometric sensor 26a detects the brightness of the entire subject image with a plurality of blocks as shown in FIG. 16, the brightness distribution of the subject image can be calculated in the same manner as in the first embodiment. .

  When the light emission group correction process is completed, a GUI display related to the light amount ratio control is displayed on the TFT monitor 8 as shown in FIG. 6A (S305). Then, the ring light 61 starts modeling light emission controlled by the strobe MPU 69 in accordance with the arrangement direction and the light amount ratio of the light emission groups corresponding to the GUI display (S306). At this time, the photographer can observe the subject image through the optical viewfinder 32 under the same illumination conditions as in actual photographing. Further, it is possible to adjust the light amount ratio in real time by operating the operation member of the camera 1.

  After the modeling light emission is started, it is detected whether the preview button 5 is pressed again (S307). If the preview button 5 is pressed again, the camera MPU 21 determines whether the modeling light emission is being performed (S308). When modeling light emission is in progress, after the modeling light emission is stopped by the flash MPU 69 (S309), the camera MPU 21 releases the aperture of the photographing lens 50 (S310). When the aperture of the taking lens 50 is released and the preview operation is stopped, the camera 1 is put into a standby state by the camera MPU 21.

  As described above, even when the light emitting unit 64 of the ring light 61 is not mounted on the photographing lens 50 in the normal mounting posture, the arrangement direction of the light emitting group set by the camera and the arrangement direction of the light emitting group for actually controlling the light amount ratio are changed. Can be matched.

  In addition, since the light emission group correction process is performed at the start of the preview operation, it is possible to check the subject in a state in which the modeling light emission is performed during the preview operation and illumination equivalent to that at the time of shooting is performed. Further, since the luminance distribution of the subject is obtained by the photometric sensor 26a disposed in the optical viewfinder 32, it can be applied even to a camera that does not have a live view function.

  In the above-described two embodiments, a white LED that can be easily divided into a plurality of light emitting regions and controlled for lighting is used as the light source of the light emitting unit 64, but a small xenon is used as the light source of the light emitting unit 64. You may use what arranged the pipe | tube finely.

  In addition, the light emission group configuration is changed based on a comparison result of a plurality of calculated luminance distributions, but a warning is displayed on the TFT monitor 8 from the comparison result that the light emitting unit 64 is not mounted in the normal mounting posture. May be.

  Further, the number of light emitting areas to be turned on and the phase to be changed in the light emitting group correction process are not particularly limited, and the mounting posture of the light emitting unit 64 can be determined from the position of the lighted light emitting areas and the luminance distribution of the subject image. I just need it. For example, only one predetermined point may be turned on, and the determination may be made from the position of the light emitting region and the luminance distribution of the acquired subject image.

  Further, the light emitting areas used only for the light emitting group correction process may be provided individually in the light emitting areas of the light emitting unit 64.

  In addition, when the camera is not mounted in a normal mounting posture, the photographer can select whether or not the light emitting group arrangement direction set by the camera and the light emitting group arrangement direction that is actually controlled with the light intensity ratio are matched. Also good.

The perspective view of the ring light in the embodiment of the present invention. 1 is a perspective view of a digital camera equipped with a photographic lens according to an embodiment of the present invention. 1 is a rear perspective view of a digital camera according to an embodiment of the present invention. The figure which shows the light emission area | region of the light emission part when the ring light in embodiment of this invention is mounted | worn with a normal mounting attitude | position. The block diagram which shows the internal structure of the flash system in embodiment of this invention. The figure which shows GUI regarding the light quantity ratio control displayed on the TFT monitor of a camera. The flowchart explaining operation | movement of the live view function in 1st Embodiment. The figure which shows GUI regarding the light quantity ratio control displayed during live view operation | movement. The flowchart explaining the light emission group correction | amendment process in embodiment of this invention. The figure which shows the light emission area | region of the light emission part when the ring light in embodiment of this invention is mounted | worn with sideways. The figure which shows how to make the shadow of a to-be-photographed image appear when changing a light emission area and making it light. The figure regarding the luminance distribution calculation method of a captured image. 10 is a flowchart for explaining the operation of a preview function in the second embodiment. FIG. 3 is a perspective view of a strobe system in which a ring light is mounted in a normal mounting posture. The perspective view of the strobe system which mounted | wore the ring light sideways. The figure which showed the structure of the detection area of a photometry sensor. The figure which shows the light emission part of the ringlight in patent document 1. FIG. The figure which shows the screen which sets the light quantity ratio of the light source of right and left of the ring light in patent document 1. FIG.

Explanation of symbols

1 Camera 3 Release Button 5 Preview Button 7 Live View Button 8 TFT Monitor 11 Main Mirror 21 Camera MPU
DESCRIPTION OF SYMBOLS 25 Image pick-up circuit 25a Image pick-up sensor 26 Photometry circuit 26a Photometry sensor 27 Image processing circuit 32 Optical viewfinder 50 Shooting lens 61 Ring light 62 Control part 63 Connection code 64 Light emission part

Claims (11)

An imaging device capable of mounting a flash device having a plurality of light emitting areas in an arbitrary mounting posture,
A calculation means for calculating the luminance distribution of the subject;
A determination unit that determines a mounting posture of the flash device with respect to the imaging device based on a luminance distribution of the subject calculated by the calculation unit;
An imaging apparatus comprising: a light emission control unit that determines a light emission amount of each light emitting region based on a result of the determination unit.   The determination unit determines a mounting posture of the flash device with respect to the imaging device from a luminance distribution of the subject calculated by the calculation unit when a part of the plurality of light emitting regions is caused to emit light. The imaging device according to claim 1. The calculation means calculates a plurality of luminance distributions of the subject when light is emitted from a part of the plurality of light emitting regions, and the light emitting region to be emitted is changed.
The imaging apparatus according to claim 1, wherein the determination unit determines a mounting posture of the flash device with respect to the imaging apparatus by comparing a plurality of calculation results calculated by the calculation unit. Setting means for setting the light emission amount of each of the light emitting areas;
The light emission control means causes the light emitting region to emit light so as to achieve the set light emission amount when the mounting posture of the flash device with respect to the imaging device is a predetermined posture, and the flash device with respect to the imaging device. When the mounting posture is not the predetermined posture, the light emitting region is caused to emit light so as to have a light emission amount set for the light emitting region existing at the same position when the flash device is mounted in the predetermined posture. The imaging device according to any one of claims 1 to 3, wherein Display means for performing live view display for sequentially displaying images of the subject based on image data acquired by imaging the subject;
The calculation means calculates a luminance distribution of the subject using the acquired image data,
5. The imaging apparatus according to claim 1, wherein when the live view display is started by the display unit, the determination unit determines a mounting posture of the flash device with respect to the imaging apparatus. 6. . An instruction means for instructing a narrowing-down operation for narrowing the aperture of the imaging device to an arbitrary aperture value within a predetermined range;
5. The image pickup apparatus according to claim 1, wherein the determination unit determines a mounting posture of the flash device with respect to the image pickup apparatus when the narrowing-down operation is instructed.   The imaging device according to claim 1, wherein the light emitting regions are arranged in a ring shape. The flash device includes a light emitting unit having the plurality of light emitting regions, and a control unit that controls the light emitting unit according to a command from the imaging device,
The imaging apparatus according to claim 1, wherein the determination unit determines a mounting posture of the light emitting unit with respect to the imaging apparatus from a calculation result of the calculation unit. A mounting portion for mounting the light emitting portion;
The imaging apparatus according to claim 8, wherein the mounting portion is provided at a distal end of a photographing lens of the imaging apparatus. A flash system comprising a flash device having a plurality of light emitting areas and an imaging device capable of mounting the flash device in an arbitrary mounting posture,
A calculation means for calculating the luminance distribution of the subject;
A determination unit that determines a mounting posture of the flash device with respect to the imaging device based on a luminance distribution of the subject calculated by the calculation unit;
A strobe system comprising: a light emission control unit that determines a light emission amount of each light emitting region based on a result of the determination unit. A light emission control method for a flash device that has a plurality of light emitting areas and can be mounted in an arbitrary mounting posture on an imaging device,
A calculation step for calculating a luminance distribution of the subject;
A determination step of determining a mounting posture of the flash device with respect to the imaging device based on a luminance distribution of the subject calculated in the calculation step;
And a light emission control step of determining a light emission amount of each of the light emitting regions based on a result of the determination step.

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