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JP2010200253

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2010200253
The present invention provides an imaging device capable of appropriately picking up and
capturing images according to the distance between the imaging device and a subject. An
imaging apparatus includes an acquisition unit, an imaging unit, a control unit, and a recording
control unit. An acquisition part acquires focal distance information which is information on a
focal distance of a photography lens. The imaging unit captures an image of a subject via a
shooting lens and generates image data. The control unit changes the directivity of the
microphone that collects the sound based on the focal distance information acquired by the
acquisition unit. The recording control unit associates the image data with the audio data
collected through the microphone and causes the storage unit to store the associated data.
[Selected figure] Figure 2
Imaging device
[0001]
The present invention relates to an imaging device such as a digital camera or video camera that
captures a still image or a moving image together with sound.
[0002]
Conventionally, a system for bi-normal (stereo) recording of voice is known (see, for example,
Patent Document 1).
[0003]
JP 2008-136215 A
03-05-2019
1
[0004]
By the way, in recent years, single-lens reflex cameras that capture moving images as well as
audio have been developed.
In an imaging apparatus such as this single-lens reflex camera, lenses can be replaced, and a
telephoto lens can be used.
When such a telephoto lens is used, there is a problem that it is difficult to collect and record
sound around the subject because the distance between the imaging device and the subject is
long.
One possible solution to this problem is to use a directional microphone.
[0005]
However, when using a wide-angle lens or a standard lens, the distance between the imaging
device and the subject may be short, and it may be desirable to collect and record sound around
the imaging camera. In such a case, it is not suitable to use the directional microphone as
described above. That is, in the conventional imaging device, there has been a problem that it is
not possible to appropriately pick up and capture images according to the distance between the
imaging device and the subject.
[0006]
The present invention has been made in view of such circumstances, and an object thereof is to
provide an imaging device capable of appropriately picking up and imaging according to the
distance between the imaging device and a subject. is there.
[0007]
This invention was made in order to solve the subject mentioned above, and the invention
according to claim 1 is an acquisition part which acquires focal length information which is
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information on a focal length of a photography lens, and via the photography lens A control unit
configured to capture an object and generate image data; a control unit configured to change
directivity of a microphone configured to collect voice based on focal length information
acquired by the acquisition unit; And a recording control unit for associating the voice data
collected via the recording medium with one another and storing the voice data in the storage
unit.
[0008]
According to the present invention, the imaging device acquires focal distance information which
is information of the focal distance of the imaging lens, changes the directivity of the microphone
that collects the sound based on the acquired focal distance information, and transmits the
directivity. By associating and storing voice data and image data collected via the changed
microphone, it is possible to appropriately pick up and capture images according to the distance
between the imaging device and the subject. .
[0009]
It is a block diagram showing composition of an imaging device by a 1st embodiment of this
invention.
It is a block diagram which shows the structure of the control part of FIG. 1, and a signal
processing part.
It is a flowchart which shows operation | movement of the imaging device by 1st Embodiment.
It is a flowchart which shows operation | movement of FIG.3 S103. It is a table | surface which
shows the directivity of the microphone as an example determined by the directivity
determination part. It is a block diagram showing composition of a control part of an imaging
device by a 2nd embodiment of this invention, and a signal processing part. It is a table | surface
as an example which divides the system of a lens based on a focal distance. It is a table | surface
which shows the information which shows the directivity linked | related with imaging |
photography mode and focal distance information. It is a flowchart which shows operation |
movement of the imaging device by 2nd Embodiment.
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3
[0010]
First Embodiment Hereinafter, an embodiment of the present invention will be described with
reference to the drawings. FIG. 1 is a schematic block diagram showing a configuration of an
imaging device 1 according to a first embodiment of the present invention. The imaging lens 2 is
detachably attached to the imaging device 1. Here, the configuration of the imaging lens 2 will be
described together with the configuration of the imaging device 1.
[0011]
The photographing lens 2 has a lens unit 21, a diaphragm unit 22, and an AF (Auto Focus
Control) unit 23. The lens unit 21 includes a plurality of lens groups, and receives light from a
subject or the like. The diaphragm unit 22 has a plurality of diaphragm wings, and narrows the
light received by the lens unit 21 by opening and closing the plurality of diaphragm wings. The
AF unit 23 controls the lens unit 21 so as to focus on the subject.
[0012]
In addition, the photographing lens 2 outputs focal distance information, which is information of
a focal distance of the self-photographing lens 2, to the imaging device 1 via an electrical contact
between the self-photographing lens 2 and the imaging device 1. The focal length information is
changed along with the zoom, for example, when the photographing lens 2 is a zoom lens. For
example, the AF unit 23 of the photographing lens 2 outputs focal distance information to the
imaging device 1.
[0013]
The imaging device 1 includes a microphone 11, a shutter unit 12, a sensor unit 13, a signal
processing unit 14, a memory card 15, a control unit 16, an operation unit 17, and an acquisition
unit 18. . The microphone 11 is built in the imaging device 1 and is, for example, the same
surface as the surface to which the photographing lens 2 is attached in the imaging device 1
main body, and the upper side of the imaging device 1 with the left hand Is attached to The
microphone 11 can be controlled by the control unit 16 to change the directivity of the sound to
be collected. The microphone 11 has, for example, the directivity changed to omnidirectional,
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unidirectional or superdirective.
[0014]
The shutter unit 12 controls the opening and closing of the shutter member to transmit or shield
the light flux input from the photographing lens 2. The sensor unit 13 converts the light flux
from the photographing lens 2 input through the shutter unit 12 into an electrical signal. The
sensor unit 13 is, for example, a charge coupled device (CCD) or a complementary metal oxide
semiconductor (CMOS) image sensor.
[0015]
The signal processing unit 14 causes the memory card 15 to record the electric signal converted
by the sensor unit 13 as a still image or a moving image. Further, when the electric signal
converted by the sensor unit 13 is recorded on the memory card 15 as a still image or a moving
image, the signal processing unit 14 associates the still image or the moving image with the
audio signal collected by the microphone 11 and stores the memory. The card 15 is made to
record. The memory card 15 is a non-volatile storage device such as a flash memory. The
memory card 15 may be removable from the imaging device 1.
[0016]
The operation unit 17 has a plurality of buttons, dials, direction input keys or a touch panel
operated by the user. Here, the operation unit 17 will be described as having the release button
171, the shooting mode switching button 172, and the microphone directivity setting button
173.
[0017]
The release button 171 outputs a release signal, which is a signal indicating imaging, to the
control unit 16 when pressed by the user. The shooting mode switching button 172 is, for
example, a dial button, and when rotated by the user, outputs a shooting mode switching signal
indicating the shooting mode according to the rotation angle to the control unit 16. For example,
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as described later, this shooting mode switching signal switches the shooting mode such as
portrait, landscape or children. The microphone directivity setting button 173 outputs a
microphone directivity setting signal, which is information for setting the directivity of the
microphone 11, to the control unit 16. For example, as this microphone directivity setting signal,
three signals indicating directivity, omnidirectionality, superdirectivity or auto are output.
[0018]
The acquisition unit 18 acquires focal distance information, which is information on the focal
distance of the imaging lens 2, from the imaging lens 2, and outputs the acquired focal distance
information to the control unit 16. The control unit 16 controls each component of the imaging
device 1 and the photographing lens 2 in accordance with, for example, each control signal input
from the operation unit 17. Further, the control unit 16 changes the directivity of the
microphone 11 that collects the sound based on the focal length information acquired by the
acquisition unit 18. The control unit 16 will be described later.
[0019]
Next, an example of the configuration of the signal processing unit 14 and the control unit 16 of
FIG. 1 will be described with reference to FIG. In the figure, parts corresponding to the parts in
FIG. 1 are given the same reference numerals, and the description thereof will be omitted.
[0020]
The signal processing unit 14 includes an imaging processing unit 141 and a recording control
unit 142. The imaging processing unit 141 performs image processing on the electrical signal
converted by the sensor unit 13 and converts the signal into a still image or a moving image. The
sensor unit 13 and the imaging processing unit 141 function as an imaging unit 19. The imaging
unit 19 captures an object through the imaging lens 2 and generates image data.
[0021]
The recording control unit 142 associates the image data generated by the imaging unit 19 with
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the audio data collected through the microphone 11 and stores the associated data in the storage
unit. The storage unit is, for example, the memory card 15, but may be a built-in storage unit
built in the imaging device 1 (not shown).
[0022]
The control unit 16 includes a distance calculation unit 161, a directivity determination unit 162,
and a directivity change unit 163. The distance calculation unit 161 calculates the distance to the
subject imaged by the imaging unit 19. The distance calculation unit 161 calculates, for example,
the distance to the subject to be imaged by the imaging unit 19 based on the focal distance
information acquired by the acquisition unit 18 and the amount of deviation of the AF. The
deviation amount of the AF is input from, for example, an AF sensor (not shown).
[0023]
The directivity determining unit 162 determines the directivity of the microphone 11 based on
the focal distance information acquired by the acquiring unit 18. Alternatively, the directivity
determination unit 162 determines the directivity of the microphone 11 based on the distance to
the subject calculated by the distance calculation unit 161.
[0024]
For example, when the distance to the subject calculated by distance calculation unit 161 is
shorter than a predetermined distance based on the acquired focal distance information,
directivity determination unit 162 determines that the directivity of microphone 11 is nondirectional. Decide to be sexual. Further, when the distance to the subject calculated by the
distance calculation unit 161 is not closer than a predetermined distance based on the acquired
focal distance information, the directivity determination unit 162 determines the directivity of
the microphone 11. Determine to be unidirectional.
[0025]
Further, the directivity determination unit 162 may determine the directivity such that the
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directivity of the microphone 11 changes continuously in accordance with the distance to the
subject calculated by the distance calculation unit 161. The directivity changing unit 163
changes the directivity of the microphone 11 determined by the directivity determining unit 162.
[0026]
Next, the operation of the imaging device 1 according to the first embodiment will be described
with reference to FIG. In response to the release button 171 being pressed, the control unit 16
acquires focal distance information from the photographing lens 2 and acquires the AF shift
amount via the acquisition unit 18 (step S101).
[0027]
Next, the distance calculation unit 161 of the control unit 16 calculates the distance to the
subject based on the acquired focal distance information and the AF shift amount (step S102).
Next, the directivity determination unit 162 of the control unit 16 determines the directivity of
the microphone 11 based on the distance to the subject calculated by the distance calculation
unit 161. Next, the directivity changing unit 163 of the control unit 16 changes the directivity of
the microphone 11 to the directivity of the microphone 11 determined by the directivity
determining unit 162 (step S103).
[0028]
Next, the imaging unit 19 acquires image data of one frame of the moving image (step S104).
Next, the control unit 16 determines whether the imaging has ended (step S105). For example,
the control unit 16 determines that imaging is ended when the release button 171 is not pressed.
[0029]
If it is determined in step S105 that the imaging has been completed, the control unit 16 ends
the imaging. On the other hand, when it is determined in step S105 that the imaging is not
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finished, the control unit 16 determines whether or not there is a change in the acquired focal
distance information or the amount of AF deviation (step S106). If there is a change in the
acquired focal distance information or the amount of deviation of the AF, it means that the
distance to the subject has changed.
[0030]
If it is determined in step S106 that there is no change in the acquired focal distance information
or the AF shift amount, the control unit 16 repeats the process from step S104. On the other
hand, if it is determined in step S106 that there is a change in the acquired focal distance
information or the AF shift amount, the control unit 16 repeats the process from step S101.
[0031]
By the operation described using FIG. 3 as described above, the imaging apparatus 1 can capture
a moving image by changing the directivity of the microphone according to the change of the
focal distance information.
[0032]
Next, a specific example of the process performed by the directivity determination unit 162
described in step S103 of FIG. 3 will be described with reference to FIG.
Here, it is assumed that the values of the predetermined distances d1, d2, and d3 are stored in
advance in the storage unit. The distance d 1, the distance d 2, and the distance d 3 have a
magnitude relation of “distance d 1 <distance d 2 <distance d 3”.
[0033]
First, the directivity determination unit 162 compares the distance to the subject (symbol d in
FIGS. 4 and 5) calculated by the distance calculation unit 161 with the distance d1 read from the
storage unit (step S201). If the distance (d) to the subject calculated in step S201 is smaller than
the distance d1, the directivity determining unit 162 determines the directivity of the
microphone 11 to be nondirectional, and the directivity changing unit 163 determines the
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directivity The directivity of the microphone 11 is changed to the nondirectional determined by
the gender determination unit 162 (step S204).
[0034]
Similar to the case of the distance d1, the directivity determination unit 162 sequentially
compares the distance (d) to the subject calculated by the distance calculation unit 161 with the
distance d2 and the distance d3 (see steps S202 and S203). . Then, when the condition is
satisfied, the directivity determining unit 162 determines the directivity of the microphone 11 to
the directivity predetermined for the condition. Next, the directivity changing unit 163 changes
the directivity determined by the directivity determining unit 162 to the directivity of the
microphone 11 (see steps S205 to S207).
[0035]
By the operation of FIG. 4 described above, directivity determination unit 162 determines the
directivity of microphone 11 as shown in FIG. 5, for example. For example, the directivity
determination unit 162 determines that the directivity of the microphone 11 is omnidirectional
when the distance (d) to the subject is d <d1. Similarly, the directivity determination unit 162 sets
the microphone as a single directivity in the case of d1 ≦ d <d2, a superdirectivity in the case of
d2 ≦ d <d3, and a superdirectivity in the case of d3 ≦ d. Determine the directivity of 11
[0036]
The imaging device 1 according to the first embodiment described above with reference to FIGS.
1 to 5 acquires focal distance information which is information of the focal distance of the
imaging lens, and collects voice based on the acquired focal distance information. The directivity
of the microphone is changed, and the voice data and the image data collected through the
microphone whose directivity is changed are associated with each other and stored. As a result, it
is possible to appropriately pick up and pick up images according to the distance between the
imaging device and the subject.
[0037]
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10
The control unit 16 may change the directivity of the microphone 11 at the start of the shooting
process, and maintain the changed directivity during the shooting process. When the shooting
lens 2 is a zoom lens, the control unit 16 may change the directivity of the microphone 11
according to the focal length of the shooting lens 2 changed by the zoom operation of the
shooting lens 2. Further, after the zoom operation of the photographing lens 2 is completed and
a predetermined time has elapsed, the control unit 16 changes the directivity of the microphone
11 according to the focal length of the photographing lens 2 changed by the zoom operation.
May be
[0038]
For example, if the directivity of the microphone 11 is frequently changed, the sound collected by
the microphone 11 may be difficult to hear. On the other hand, as the control unit 16 does not
immediately change the directivity of the microphone 11 according to the change of the focal
length as described above, the directivity of the microphone 11 is not frequently changed. It can
be reduced that the sound collected by the microphone 11 is difficult to hear.
[0039]
Second Embodiment Next, the configuration of an imaging device 1 according to a second
embodiment will be described with reference to FIG. Here, the same components as those in FIG.
1 or FIG.
[0040]
The control unit 16 further associates an imaging mode setting unit 164 for setting an imaging
mode among a plurality of imaging modes with a combination of focal distance information and
an imaging mode, and information indicating the directivity of the microphone 11 is previously
obtained. And a stored mode information storage unit 165. The photographing mode setting unit
164 is set by selecting any one of the plurality of photographing modes by the photographing
mode switching button 172 of the operation unit 17.
[0041]
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The directivity determining unit 162 of the control unit 16 changes the directivity of the
microphone 11 based on the combination of the acquired focal distance information and the
shooting mode set in the shooting mode setting unit 164. Specifically, the directivity
determination unit 162 of the control unit 16 stores information indicating the directivity of the
microphone 11 corresponding to the combination of the acquired focal distance information and
the shooting mode set by the shooting mode setting unit 164 as mode information The
directivity of the microphone 11 is determined by reading from the unit 165.
[0042]
In the present embodiment, as shown in FIG. 7, the photographing lens 2 is divided into a wide
system, a standard system, a telephoto system and a super telephoto system based on the focal
length of the photographing lens 2. Then, the directivity of the microphone 11 is determined
from a predetermined table as shown in FIG. 8 according to the section of the focal length of the
photographing lens 2 and the set photographing mode. The information shown in this table is
information indicating the directivity of the microphone 11 as an example stored in the mode
information storage unit 165 in association with the combination of the focal distance
information and the photographing mode.
[0043]
Next, the operation of the imaging device 1 according to the second embodiment will be
described with reference to FIG. When the release button 171 is pressed, the directivity
determining unit 162 of the control unit 16 controls the directivity of the microphone 11
corresponding to the combination of the acquired focal distance information and the shooting
mode set by the shooting mode setting unit 164. Information indicating the directivity of the
microphone 11 is acquired from the mode information storage unit 165 (step S301). Next, the
directivity changing unit 163 of the control unit 16 changes the directivity of the microphone 11
based on the information indicating the directivity of the microphone 11 acquired by the
directivity determining unit 162 (step S302).
[0044]
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Next, the imaging unit 19 acquires image data of one frame of the moving image (step S303).
Next, the control unit 16 determines whether the imaging has ended (step S304). If it is
determined in step S304 that the imaging is completed, the control unit 16 ends the imaging. On
the other hand, if it is determined in step S304 that the imaging is not finished, the control unit
16 repeats the processing from step S303.
[0045]
According to the imaging apparatus 1 according to the second embodiment described above with
reference to FIGS. 6 to 9, the directivity of the microphone is changed based on the imaging
mode as well as the focal length information acquired from the imaging lens. Audio data and
image data collected via a microphone whose directivity is changed are associated with each
other and stored. As a result, it is possible to appropriately pick up and pick up images according
to the distance between the imaging device and the subject.
[0046]
The control unit 16 may change the directivity of the microphone 11 in accordance with an input
from the microphone directivity setting button 173 by the user's manual operation. In addition,
the control unit 16 selects a method of determining the directivity of the microphone 11 from
the method according to the first embodiment or the method according to the second
embodiment by the microphone directivity setting button 173 manually operated by the user. It
may be decided. Further, as a method of determining the directivity of the microphone 11, the
method according to the first embodiment may be combined with the method according to the
second embodiment. Specifically, for example, the distance calculation unit 161 of the first
embodiment calculates “wide”, “standard”, “telephoto”, and “super telephoto” of the
zoom lens column in FIG. 8 of the second embodiment. It replaces with the relationship between
the distance to the subject (d) and "d1, d2, d3". More specifically, “wide” is “d <d1”,
“standard” is “d1 ≦ d <d2”, “telephoto” is “d2 ≦ d <d3”, and superdirective is “d3 ≦
d” You may replace each with
[0047]
Although the case where the imaging lens 2 is detachably attached to the imaging device 1 has
been described in the above embodiment, the present invention is not limited to this. Even when
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the imaging device 1 and the photographing lens 2 are integrally configured, the above-described
embodiment is applicable. Further, in the description of the above embodiment, it has been
described that the imaging device 1 incorporates a microphone, but the microphone may be
externally attached to the imaging device 1. For example, a microphone may be externally
attached to the imaging device 1 via a guide member attached to the imaging device 1.
[0048]
The embodiment of the present invention has been described in detail with reference to the
drawings, but the specific configuration is not limited to this embodiment, and includes design
and the like within the scope of the present invention.
[0049]
DESCRIPTION OF SYMBOLS 1 ... Imaging device, 2 ... Photographing lens, 15 ... Memory card, 16
... Control part, 18 ... Acquisition part, 19 ... Imaging part, 142 ... Recording control part, 161 ...
Distance calculation part, 162 ... Directionality determination part, 163 ... directivity changing
unit, 164 ... shooting mode setting unit, 165 ... mode information storage unit
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