JP2011040991A - Imaging device and imaging system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging device for eliminating mechanical noise sound from sound information by detecting the noise sound of the imaging device from the sound information inputted to a microphone provided in the imaging device. <P>SOLUTION: The imaging device includes: an imaging part for imaging a subject image and outputting an image signal; a microphone attached to the imaging device; an external sound information receiving part for receiving external sound information from an external microphone of a flash device that is not attached to the imaging device; a sound information processing part for performing correction processing of sound information acquired by the microphone with the external sound information to obtain corrected sound information data; and a sound information recording part for recording the corrected sound information data in a storing part while associating it with the image signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an imaging apparatus that records sound information corresponding to an image, and more particularly to an imaging apparatus and an imaging system having a function of removing mechanical noise.

Miniaturization of imaging devices such as video cameras and digital cameras having a microphone attached to the main body is progressing.
For this reason, the microphone is often arranged near the lens in the housing of the imaging device, and in addition to surrounding sound information when imaging, mechanical noise of the imaging device, for example, a zooming operation for moving the lens, The operation sound of each function switch such as motor sound and shutter operation during focal length change such as in-focus operation is picked up by the microphone directly or propagating through the housing, and deteriorates the S / N ratio of sound information As a result, the recording quality of the sound information is degraded.

  In order to improve this S / N ratio, a proposal has been made to attach a microphone to a flash device integrated with an imaging device in consideration of the position of the microphone as far as possible from the housing of the imaging device (see, for example, Patent Document 1). ).

Japanese Patent Laid-Open No. 2003-101834

  However, when the microphone is attached to the flash device integrated with the imaging device, as described above, the size of the imaging device has been reduced, and there is a restriction on the distance between the mechanical vibration sound source inside the imaging device and the microphone, The noise noise picked up by the microphone cannot be greatly reduced to the extent that humans do not care.

  The present invention has been made in view of such circumstances, and includes noise noise by removing mechanical noise noise of the imaging apparatus from sound information input to a microphone provided in the imaging apparatus. An object of the present invention is to provide an imaging apparatus and an imaging system that can obtain sound information.

  The imaging apparatus of the present invention receives external sound information from an imaging unit that captures a subject image and outputs an image signal, a microphone attached to the imaging unit, and an external microphone of a flash device not attached to the imaging unit. An external sound information input unit, a sound information processing unit that corrects the sound information acquired by the microphone with the external sound information to obtain corrected sound information data, and the corrected sound information data corresponds to the image signal. And a sound information recording unit for recording in the storage unit.

  In the imaging apparatus of the present invention, the sound information processing unit compares the sound information with the external sound information, detects a sound information signal measured only in the sound information as difference data, and detects the difference data. Is generated from the sound information to generate the corrected sound information data.

  In the imaging device according to the aspect of the invention, the sound information processing unit may calculate the sound information based on a distance difference between a first distance between the subject and the microphone and a second distance between the flash device and the microphone. Sound pressure ratio and phase difference between the external sound information and the sound pressure ratio and phase difference, the sound pressure and phase of the external sound information are made to correspond to the sound information, and the sound information is corrected. And

  In the imaging apparatus of the present invention, when the sound information processing unit receives a virtual distance from the virtual position of the subject to the microphone, the sound information at the first distance is converted to the sound pressure at the virtual distance and It is converted into virtual sound information to be a phase, the distance from the virtual position to the flash device is the second distance, and the virtual sound information is corrected.

  In the imaging apparatus according to the aspect of the invention, when the level of the difference data is greater than or equal to a set value, the sound information processing unit may obtain the sound information during a period in which difference data greater than or equal to the set value exists, the sound pressure ratio and the phase difference. Is replaced with the external sound information corresponding to the sound information.

  In the imaging device of the present invention, when a plurality of microphones are provided, a first distance between the subject and each of the plurality of microphones, and a second distance between the flash device and each of the plurality of microphones, And the sound information of each microphone is corrected based on the sound pressure ratio and the phase difference corresponding to each distance difference.

  In the imaging device of the present invention, when a plurality of the microphones and the flash devices are provided, a first distance between the subject and each of the plurality of microphones, and between each of the plurality of flash devices and the plurality of microphones. The sound information of each of the microphones is corrected using the second distance that is the distance of the microphone and the external sound information from a plurality of external microphones.

  The imaging apparatus according to the present invention further includes distance measuring means for measuring the first distance and the second distance.

  The imaging system of the present invention is a system that includes an imaging device and a flash device that is disposed at a different location from the imaging device and that irradiates light on the subject when the imaging device captures the image. An irradiating unit that irradiates light to the subject with an imaging signal indicating imaging timing from the imaging device, an external microphone, and an external sound information output unit that transmits external sound information acquired by the external microphone to the imaging device. Then, the imaging device inputs from the flash device, an imaging unit that captures a subject image of the subject and outputs an image signal, a microphone mounted on the imaging device, and external sound information acquired by the external microphone. An external sound information input section, a sound information processing section that corrects the sound information acquired by the microphone with the external sound information to obtain corrected sound information data, and the corrected sound information data. Serial to correspond to the image signal and having a sound information recording unit that records in the storage unit.

  As described above, according to the present invention, the sound information input to the microphone provided in the imaging device is compared with the external sound information input from the flash device that is not in direct contact with the imaging device. The sound that is present in the sound information but not in the external sound information is detected as a noise sound due to the mechanical operation of the imaging device, and the noise sound is removed from the sound information, so that the sound Sound information with improved quality can be provided.

It is a figure which shows the structural example of the imaging system by the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the imaging device 1 in FIG. It is a block diagram which shows the structural example of the flash device 2 in FIG. It is a flowchart explaining the operation example of the imaging device in the imaging system by 1st Embodiment. It is a figure which shows the structural example of the imaging system by the 2nd Embodiment of this invention. It is a figure which shows the structural example of the imaging system by the 3rd Embodiment of this invention. It is a figure which shows the structural example of the imaging system by the 4th Embodiment of this invention. It is a block diagram which shows the structural example of the flash device 2 in FIG. It is a figure which shows the structural example of the imaging system by the 5th Embodiment of this invention.

<First Embodiment>
Hereinafter, an imaging system having an imaging device and a flash device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of an imaging system according to the embodiment.
In this figure, the imaging device 1 of the present embodiment images a subject, and a microphone MIC1 to which sound in a shooting environment around the subject is input as sound information is mounted on the imaging device body 10.
The flash device 2 emits flash light (flash light) in response to an instruction signal indicating the imaging timing of an image input from the imaging device 1, and a microphone MIC2 to which sound in the shooting environment is input as external sound information. Is installed.

Next, the configuration of the imaging apparatus 1 in FIG. 1 will be described with reference to the drawings. FIG. 2 is a block diagram illustrating a configuration example of the imaging apparatus 1 in FIG.
2, the imaging apparatus 1 includes a microphone MIC1, an imaging unit 11, an external sound information input unit 12, a distance measurement unit 13, an angle measurement unit 14, a distance calculation unit 15, a sound information processing unit 16, a transmission unit 17, and a control unit. 18 and a storage unit 19.

  The imaging unit 11 includes a photographing lens having a zoom lens and a focus lens, and an imaging element configured by a CCD (Charge Coupled Device) or the like. The imaging unit 11 has a zoom mechanism control unit, and drives the zoom lens to move back and forth in the optical axis direction to control zoom of the photographing lens. Here, the photographing lens, the zoom mechanism control unit, and the focus mechanism control unit constitute a photographing optical system. The imaging unit 11 includes a focus mechanism control unit that performs autofocus, and drives the focus lens to move back and forth along the optical axis, thereby adjusting the focus of the image of the photographic subject that is imaged on the imaging surface of the image sensor. I do. The image pickup device picks up an image of a subject formed on the image pickup surface via a photographing lens, writes it as image data in the storage unit 19 corresponding to time information, and stores it.

  When a signal such as FM-modulated sound information transmitted from the microphone MIC <b> 2 is received, the external sound information input unit 12 performs FM demodulation on the signal and outputs the signal to the sound information processing unit 16.

The distance measuring unit 13 measures a distance L11 between the imaging device 1 and the subject 100 and a distance L21 between the imaging device 1 and the flash device 2. Here, for example, the distance measuring unit 13 may be configured to measure the distance to the subject by irradiating the subject 100 (or the flash device 2) with, for example, infrared rays and receiving the reflected light. That is, the distance measuring unit 13 receives and receives light such as infrared rays with respect to the subject 100 and calculates the distance to the subject based on the time difference.
The distance measurement unit 13 specifies a subject distance, which is a distance from the imaging device 1 to the subject 100, by performing a predetermined calculation based on the contrast of the captured image of the subject 100 in the imaging unit 11.

  That is, the distance measuring unit 13 has a distance information table for detecting the in-focus position where the imaging lens for focusing is moved in the imaging unit 11 and obtaining distance information from the imaging unit 1 to the subject 100. The distance corresponding to the in-focus position is output as the subject distance. In this distance information table, the in-focus position and the subject distance that is the distance between the subject 100 and the imaging unit 11 are stored in association with each other. For example, the subject distance from the closest position to the infinite position is about several bits. The subject distance corresponding to the detected in-focus position can be obtained. As the subject distance measured by the distance measuring unit 13, the distance between the imaging device 1 and the subject 100 is the first distance L11, and the distance between the imaging device 1 and the flash device 2 is the second distance L21.

  The angle measurement unit 14 includes an azimuth sensor or the like, and measures, for example, an azimuth angle of the image pickup unit 11 (measures the angle clockwise with respect to the north, in units of degrees, minutes, and seconds) using a gyro. Is. That is, the angle measurement unit 14 measures an azimuth angle α (not shown) from the imaging device 1 to the subject 100 by an input instructing angle measurement by the user, and then the azimuth angle from the imaging device 1 to the flash device 2. β (not shown) is measured, an angle difference between the measured azimuth angle α and azimuth angle β is calculated, and the angle difference between these azimuth angles is output as an angle θ1. Here, the angle measuring unit 14 is mounted on the imaging apparatus 1 so as to measure the azimuth angle in the direction in which the lens of the imaging unit 11 is directed.

The distance calculation unit 15 calculates the third distance L31 between the flash device 2 and the subject 100 using the first distance L11, the second distance 21, and the angle θ1 as follows.
First, the distance calculation unit 15 calculates the distance L12 from the intersection A between the line LN11 connecting the imaging device 1 and the subject 100 and the line LN22 perpendicular to the line LN11 and passing through the microphone MIC2 to the imaging device 1. Using the second distance L21 and the angle θ1, the following formula is used.
L12 = L21 × cos (θ1)
Then, the distance calculation unit 15 calculates the distance L13 from the intersection A to the subject 100 by subtracting the distance L12 from the first distance L11 as in the following equation.
L13 = L11−L12
The distance calculation unit 15 calculates the distance L22 from the intersection A to the microphone MIC2 (flash device 2) by using the second distance L21 and the angle θ1 as in the following expression.
L22 = L21 × sin (θ1)
When the distance L13 and the distance L22 are calculated, the distance calculation unit 15 calculates the third distance L31 from the flash device 2 to the subject 100 by the following equation.
L31 = (L13 ² + L22 ² ) ^1/2

The sound information processing unit 16 subtracts the third distance L31 from the first distance L11 to calculate a distance difference SB between the first distance L11 and the third distance L31, and a propagation delay time Td that is a phase difference due to the distance difference SB. Ask for. The propagation delay time Td indicates a time difference between the sound propagating through the first distance L11 and the sound propagating through the third distance L31. The sound information processing unit 16 calculates the propagation delay time Td by dividing the distance difference SB by the sound speed c using the following equation.
Td = SB / c
= SB / (331.5 + 0.6 × tm) where tm is the ambient temperature (Celsius)

The sound information processing unit 16 also receives sound information input from the microphone MIC1 (electric signal indicating the amplitude intensity of the sound pressure input to the microphone MIC1) and external sound information input from the external sound information input unit 12 ( The external sound information is delayed by the propagation delay time Td and the phase (time timing) is matched with the sound information to be compared in order to compare with the electric signal indicating the amplitude intensity of the sound pressure input to the microphone MIC2. . That is, the sound information processing unit 16 sets the phase difference between the sound information and the external sound information to 0 when comparing the external sound information and the sound information, and each of the microphones MIC1 and MIC2 has the sound at the same distance from the subject 100. Is acquired. Here, the sound information processing unit 16 has an amplifier circuit that amplifies the sound information input from the microphone MIC1 with a preset amplification degree. As described later, the external information sound is input from the microphone MIC2 and then amplified by the amplifier circuit in the flash device 2, and then transmitted to the imaging device 1.
In addition, the sound information processing unit 16 matches the sound pressure between the sound information and the external sound information, so that the sound intensity is attenuated by the square of the distance, so that it corresponds to the sound pressure ratio between the external sound information and the sound information. In order to match the sound intensity of the external sound information with the sound information, the signal level of the external sound information is attenuated by the amplification degree γ calculated by the following equation.
γ = (L31 / L11) ²

Further, the sound information processing unit 16 corrects the sound pressure (signal level) and the phase (time timing) for the external sound information corresponding to the distance difference SB, and then performs the sound information and the external sound information. Compare the sound pressures.
That is, the sound information processing unit 16 obtains difference data that is a difference in sound pressure between the sound information and the external sound information, and the noise data is removed by deleting the difference data from the sound information according to the time. Ask for sound information.
That is, the sound information processing unit 16 removes, from the sound information, a sound that is not input by the microphone MIC2 of the flash device 2 but is input only by the microphone MIC1 of the imaging device 1 from the sound information. Sound information that does not exist is generated, and written and stored in the storage unit 19 corresponding to the time information.
In addition, when the level of the difference data exceeds a preset threshold value, the sound information processing unit 16 determines that the correction cannot be performed, and the sound information in the period (time range) in which the difference data exceeding the threshold value exists is set to the sound pressure and You may comprise so that it may substitute with the external sound information which correct | amended the phase.

When an instruction signal is input from a power switch, a zoom switch, a setting switch, a half-press switch, or a release switch (full-press switch) (not shown), the control unit 18 corresponds to each instruction signal and corresponds to each part of the imaging device 1. Control. When the control unit 18 detects that the user has pressed the release switch for instructing the imaging, the control unit 18 outputs a control signal for controlling the imaging process to the imaging unit 11 and also transmits to the transmission unit 17. A control signal for controlling the flash device 2 is output.
When the control signal is input from the control unit 18, the transmission unit 17 transmits an instruction signal indicating an imaging timing for irradiating the subject 100 with the flash to the flash device 2.
The control unit 19 samples the sound information and the external sound information at the same sampling period, performs A / D (analog / digital) conversion, and sends the sound information to the sound information processing unit 16 in time series for each time of each period. , A / D converted sound information and external sound information are output.
The control unit 18 displays the image data output from the imaging unit 11 on a display unit formed from a liquid crystal display panel.
The storage unit 19 stores the corrected sound signal and the image data captured by the imaging unit 11 in correspondence with the time information.

Next, the configuration of the flash device 2 in FIG. 1 will be described with reference to the drawings. FIG. 3 is a block diagram showing a configuration example of the flash device 2 in FIG.
In FIG. 3, the flash device 2 includes a microphone MIC2, a flash emission unit 21, a control unit 22, an external sound output unit 23, a reception unit 24, and a storage unit 25.
When the instruction signal transmitted from the imaging device 1 is input via the reception unit 24, the control unit 22 outputs control information for emitting a flash (flash) to the flash emission unit 21.

When the control information for emitting the flash light is input from the control unit 22, the flash light emitting unit 21 emits the flash light in the emission direction.
The external sound output unit 23 includes an amplification circuit that adjusts the level of external sound information input from the microphone MIC2, and includes an FM modulation circuit that performs FM modulation on the external sound information subjected to level adjustment, and is modulated from an antenna (not shown). External sound information is transmitted to the imaging apparatus 1. Here, as a matter of course, the external sound information input from the microphone MIC2 does not include a noise sound inside the imaging apparatus 1. Further, the amplification degree for the external sound information of the amplification circuit in the external sound output unit 23 and the amplification degree for the sound information of the amplification circuit in the sound information processing unit 16 in the imaging device 1 are the same distance between the microphones MIC1 and MIC2. When the same sound is input, the amplification result is adjusted so as to have the same sound pressure level.
The control unit 22 controls the operation of each unit in the flash device 2 based on information stored in the storage unit 23.

Next, noise noise removal processing in the imaging apparatus 1 according to the present embodiment will be described with reference to FIGS. 1, 2, and 4. FIG. 4 illustrates noise noise removal processing in the imaging apparatus 1 according to the present embodiment. It is a flowchart explaining an operation example.
When an operation for acquiring the first distance L11 is performed by the user, the control unit 18 outputs a control signal for acquiring the first distance L11 to the distance measurement unit 13. At this time, the user is in a state where the imaging unit 11 is directed toward the subject 100.
When the control signal is input, the distance measuring unit 13 measures the first distance L11 that is the distance between the subject 100 and the imaging device 1 (step S1), and the distance calculation unit 15 sends the first distance L11 as the measurement result. Is output.

Next, the user points the imaging unit 11 of the imaging device 1 toward the flash device 2.
Then, when an operation for acquiring the second distance L21 is performed by the user, the control unit 18 outputs a control signal for acquiring the second distance L21 to the distance measurement unit 13.
When the control signal is input, the distance measuring unit 13 measures the second distance L21, which is the distance between the flash device 2 and the imaging device 1 (step S2), and sends the second distance of the measurement result to the distance calculating unit 15. L21 is output.

When the user directs the imaging unit 11 of the imaging device 1 toward the subject 100 and performs an operation for measuring the azimuth angle, the angle measurement unit 14 causes the azimuth angle in the direction of the line LN11 connecting the imaging device 1 to the subject 100. Measure α (not shown).
Further, when the user directs the imaging unit 11 of the imaging device 1 toward the flash device 2 and performs an operation of measuring the azimuth angle, the angle measurement unit 14 causes the line LN 21 connecting the imaging device 1 to the flash device 2. A direction azimuth β (not shown) is measured.
And the angle measurement part 14 calculates | requires the difference of azimuth angle (alpha) and azimuth angle (beta), and outputs it as angle (theta) 1 which line LN11 and line LN21 make (step S3).

Next, the distance calculation unit 15 calculates a first distance L31 between the flash device 2 and the subject 100 (step S4).
When calculating the first distance L31, the distance calculation unit 15 obtains a distance difference BS between the first distance L11 and the third distance L31, and calculates a propagation delay time Td in which sound propagates through the distance difference BS (step S5). ). Further, the sound information processing unit 16 calculates an amplification degree γ that matches the sound pressure of the sound information input from the microphone MIC2 with the sound pressure of the sound information input from the microphone MIC1, based on the distance difference BS.

  The control unit 18 determines whether or not the recording switch for starting recording is in the on state (step S6). If the recording switch is in the on state, the process proceeds to step S7 to start recording. On the other hand, when the recording switch is in the OFF state, the process of step S6 is repeated for a predetermined time.

When the switch is on, the control unit 18 outputs a control signal that instructs the sound information processing unit 16 to start the recording process.
Thereby, the sound information processing unit 16 uses the amplification degree γ and the propagation delay time Td to match the sound pressure and phase of the external sound information to the sound pressure and phase of the sound information for each A / D converted period. Correction processing is performed (step S7).
After matching the sound pressure and phase of the sound information and the external sound information, the sound information processing unit 16 compares the sound information and the external sound information at the same phase for each A / D converted sampling period. Difference data is obtained as a difference in sound pressure (amplitude level of the signal) between the information and the external sound information (step S8).

Next, the sound information processing unit 16 performs a correction process of subtracting the difference data from the sound information for each cycle to remove the difference data (that is, noise sound information) (step S9).
Then, the sound information processing unit 16 writes and stores the corrected sound information in the storage unit 19 in association with the time of the image data (step S10).
The control unit 18 detects whether the recording switch is on (in a state where the recording process is performed) or off (a state in which the recording process is not performed) at every preset detection cycle (step S11). The process proceeds to step S6, and if it is on, the process proceeds to step S7, and the processes from step S7 to step S11 are repeated.

Through the above-described processing, according to the present embodiment, the noise information generated by the mechanical operation inside the imaging apparatus 1 in the sound information input to the microphone MIC1 provided in the imaging apparatus 1 is converted into the sound information and the external sound information. Is detected as difference data, and the difference data is corrected to be subtracted from the sound information to generate sound information from which the noise sound has been removed. At the same time, it can be stored in the storage unit 19, and sound information with improved sound quality can be provided together with image data as compared with the conventional case.
In addition, the distance L11, the distance L21, and the angle θ1 are measured in advance by another measuring device, and the user inputs to the imaging apparatus 1, and the control unit 18 calculates the distance from the input distance L11, the distance L21, and the angle θ1. It may be configured to output to the unit 15 and the sound information processing unit 16.

<Second Embodiment>
Hereinafter, an imaging system having an imaging device and a flash device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a block diagram illustrating a configuration example of the imaging system according to the embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, differences from the first embodiment will be described.
When the distance from the imaging device 1 to the subject 100 is far, the movement of the image data may not correspond to the sound information due to the relationship of the sound speed. That is, when the sound information generated by the subject 100 is far from the imaging device 1 to the subject 100, a propagation delay occurs as a result of dividing the distance by the speed of sound.
Therefore, according to the second embodiment, as shown in FIG. 5, the distance from the imaging device 1 to the subject 100 is shortened to a distance Lx, and the virtual subject is set to a distance of L11-Lx from the imaging device 1. 101 is virtually provided, and sound information is generated from the virtual subject 101, and the sound information processing unit 16 corrects the sound information with the external sound information.

When the user inputs the distance Lx, the control unit 18 outputs the input distance Lx to the sound information processing unit 16.
Then, the sound information processing unit 16 uses the amplification degree γ and the propagation delay time Td to correct the sound pressure and phase of the external sound information to the sound pressure and phase of the sound information as in the first embodiment. The sound information is corrected by the difference data obtained by comparing the sound information and the external sound information.
Next, when the sound information processing unit 16 divides the distance Lx by the sound speed, calculates the correction time Tc, and stores it in the storage unit 19 corresponding to the time of the image data, the corrected sound for the image data is stored. The information time is stored in the storage unit 19 earlier than the correction time Tc.

  Thereby, according to the second embodiment, sound information from the virtual subject 101 that is close to the actual position of the subject 100 by the distance Lx from the imaging device 1 can be obtained corresponding to the image data. That is, since the sound information can be converted so as to shift the phase with the image data so that the sound information is generated at an arbitrary position, the sound quality can be improved as in the first embodiment, and the image can be improved. Sound information with less sense of incongruity in the video and timing by data can be generated.

<Third Embodiment>
Hereinafter, an imaging system having an imaging device and a flash device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a block diagram illustrating a configuration example of the imaging system according to the embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, differences from the first embodiment will be described. The flash device 4 has the same configuration as the flash device 2 of FIG.
In the first embodiment, the imaging system has only one flash device 2 as the flash device. On the other hand, in the third embodiment, two flash devices equipped with microphones, that is, the microphone MIC2 is mounted. And the flash device 4 on which the microphone MIC4 is mounted. The imaging apparatus 1 is also equipped with two microphones (for stereo recording), which are microphones MIC11 and MIC12. Here, the microphone MIC2 corrects the sound information of the microphone MIC11, and the microphone MIC4 corrects the sound information of the microphone MIC12.
That is, the imaging device 1 is provided with a plurality of microphones MIC11 and MIC12, and flash devices 2 and 4 corresponding to the microphones MIC11 and MIC12 are used.

Similar to the first embodiment, the distance measuring unit 13 includes a first distance LN11 between the point C of the imaging device 1 and the subject 100, a second distance L21 between the point C of the imaging device 1 and the flash device 2, and The fourth distance between the point C of the imaging device 1 and the flash device 41 is measured.
Similarly to the first embodiment, the angle measurement unit 14 also determines the azimuth angle α (not shown) in the direction from the point C of the imaging device 1 to the subject 100 and the point C of the imaging device 1 to the flash device 2. An azimuth angle β1 (not shown) in the direction of, and an azimuth angle β2 (not shown) in the direction from the imaging device 1 to the flash device 4 are measured. Here, the point C of the imaging device 1 is the microphone of the microphone MIC12 on a line passing through the center of the microphone surface (surface of the diaphragm) of the microphone MIC12 and the microphone MIC11 in the two-dimensional plane of the line LN11 and the line LN21. This is the midpoint of the line segment between the center of the surface and the center of the microphone surface of the microphone MIC11. For example, the point C is an intersection point on the optical axis of the optical system of the imaging unit 11.
Then, the angle measurement unit 14 obtains an angle θ1 that is an angle difference between the azimuth angle α and the azimuth angle β1 and an angle θ2 that is an angle difference between the azimuth angle α and the azimuth angle β2.

The distance calculation unit 15 calculates the third distance L31 between the flash device 2 and the subject 100 using the first distance L11, the second distance L21, and the angle θ1, as in the first embodiment.
Further, the distance calculation unit 15 calculates the fifth distance L51 between the flash device 4 and the subject 100 using the first distance L11, the fourth distance L41, and the angle θ2, as follows.
First, the distance calculation unit 15 calculates a distance L14 from the intersection B between the line LN11 connecting the imaging device 1 and the subject 100 and the line LN44 perpendicular to the line LN11 and passing through the microphone MIC4 to the imaging device 1. Using the fourth distance L41 and the angle θ2, the following formula is used.
L14 = L41 × cos (θ2)

Then, the distance calculation unit 15 calculates the distance L43 from the intersection B to the subject 100 by subtracting the distance L14 from the first distance L11 as in the following equation.
L43 = L11-L14
The distance calculation unit 15 calculates the distance L44 from the intersection point B to the microphone MIC4 (flash device 4) using the fourth distance L41 and the angle θ2 as in the following expression.
L44 = L41 × sin (θ2)
When the distance L43 and the distance L44 are calculated, the distance calculation unit 15 calculates the fifth distance L51 from the flash device 4 to the subject 100 by the following equation.
L51 = (L43 ² + L44 ² ) ^1/2

In addition, the distance calculation unit 15 obtains a distance L111 between the microphone MIC11 and the subject 100 by the following equation. In the following expression, the distance L10R is the distance between the center of the microphone surface of the microphone MIC11 and the point C, and is set in the distance calculation unit 15 in advance.
L111 = (L10R ² + L11 ² ) ^1/2
Similarly, the distance calculation unit 15 obtains a distance L112 between the microphone MIC12 and the subject 100 using the following equation. In the following expression, the distance L10L is the distance between the center of the microphone surface of the microphone MIC12 and the point C, and is set in the distance calculation unit 15 in advance.
L112 = (L10L ² + L11 ² ) ^1/2

The sound information processing unit 16 subtracts the distance L31 from the distance L111 to obtain a distance difference SB1 between the distance L111 and the distance L31, and subtracts the distance L51 from the distance L112 to obtain a distance difference between the distance L112 and the distance L51. SB2 is obtained.
The sound information processing unit 16 divides the distance difference SB1 by the speed of sound to obtain a propagation delay time Td1 between the sound information of the microphone MIC11 and the external sound information from the flash device 2, and similarly, the distance difference SB2 is calculated. Dividing by the speed of sound, the propagation delay time Td2 between the sound information of the microphone MIC12 and the external sound information from the flash device 4 is obtained.

In addition, the sound information processing unit 16 obtains an amplification factor γ1 by which the sound pressure of the external sound information of the microphone MIC2 is combined with the sound pressure of the sound information of the microphone MIC11 by the following formula.
γ1 = (L31 / L111) ²
Similarly, the sound information processing unit 16 obtains an amplification factor γ2 by which the sound pressure of the sound information of the microphone MIC4 and the sound pressure of the external sound information of the microphone MIC4 are combined with the following formula.
γ2 = (L51 / L112) ²
The sound information processing unit 16 adjusts the sound pressure of the sound information of the microphone MIC2 to the microphone MIC11 by using the amplification factor γ1, and delays the sound information of the microphone MIC2 by the propagation delay time Td1, so that the phase of the sound information of the microphone MIC11 is set. Correct the alignment.
Similarly, the sound information processing unit 16 adjusts the sound pressure of the sound information of the microphone MIC4 to the microphone MIC12 by the amplification factor γ2, and delays the sound information of the microphone MIC4 by the propagation delay time Td2, so that the sound information of the microphone MIC12 is delayed. Perform correction to match the phase.

After matching the sound pressure and phase of the sound information and the external sound information, the sound information processing unit 16 compares the sound information of the microphone MIC11 and the external sound information of the microphone MIC2 in the same phase, and the sound information of the microphone MIC11. And difference data D1 is obtained as a difference in sound pressure (amplitude level of the signal) between the external sound information of the microphone MIC2.
Then, the sound information processing unit 16 subtracts the difference data D1 from the sound information of the microphone MIC11, performs correction to remove the noise sound, obtains the corrected sound information of the microphone MIC11, and corresponds to the time information of the image data. Then, the data is written and stored in the storage unit 19.

Similarly, the sound information processing unit 16 compares the sound information of the microphone MIC12 and the external sound information of the microphone MIC4 in the same phase, and calculates the difference in sound pressure between the sound information of the microphone MIC12 and the external sound information of the microphone MIC4. The difference data D2 is obtained.
Then, the sound information processing unit 16 subtracts the difference data D2 from the sound information of the microphone MIC12, performs correction to remove the noise sound, obtains the corrected sound information of the microphone MIC12, and corresponds to the time information of the image data. Then, the data is written and stored in the storage unit 19.
Further, when the sound information processing unit 16 stores the sound information of the microphone MIC11 and the microphone MIC12 in the storage unit 19, the right sound information and the left sound information are stored in the storage unit 19 so that the right sound information or the left sound information can be identified. A storage area is set as sound information.

  In addition, the distance L11, the distance L21, the distance L41, the angle θ1 and the angle θ2 are measured in advance by another measuring device, and the user inputs to the imaging apparatus 1, and the input distance L11, distance L21, distance L41, angle The control unit 18 may output the θ1 and the angle θ2 to the distance calculation unit 15 and the sound information processing unit 16.

<Fourth Embodiment>
Hereinafter, an imaging system having an imaging device and a flash device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram illustrating a configuration example of the imaging system according to the embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, differences from the first embodiment will be described. A point C in FIG. 7 is the same as the point C described in FIG. 6 of the third embodiment.
In the present embodiment, the imaging device 1 is provided with a plurality of microphones, for example, microphones MIC11 and MIC12, and the flash device 2 is provided with microphones MIC2L and MIC2R corresponding to the microphones MIC11 and MIC12.

In the imaging apparatus 1, a microphone MIC11 is provided at a position separated from the optical axis of the lens of the imaging unit 11 by a distance L10R, and a microphone MIC12 is provided at a position separated from the distance L10L.
Further, the flash device 2 is provided with a microphone MIC2L and a microphone MIC2R which are separated by a distance L20. It is assumed that the diameter of the microphone is smaller than the distance L20. This distance L20 is preset in the distance calculation unit 15. In either the microphone MIC2L or the microphone MIC2R, a distance measurement mark (for example, a light emitting LED) is added in the vicinity of the microphone imaged by the imaging unit 11. In the present embodiment, it is assumed that a mark is added to the microphone MIC2L as an example.
Here, the microphone MIC2L acquires external sound information used for correction for removing noise sound from the sound information of the MIC12, and the microphone MIC2R acquires external sound information used for correction for removing noise sound from the sound information of the MIC11.

The distance measurement unit 13 measures the second distance L21 between the imaging device 1 and the microphone MIC2L in the flash device 2 as in the first embodiment.
Further, as in the first embodiment, the angle measuring unit 14 has an azimuth angle α (not shown) in the direction from the imaging device 1 to the subject 100 and an azimuth angle β in the direction from the imaging device 1 to the flash device 2. (Not shown).
Then, the angle measurement unit 14 obtains an angle θ1 that is an angle difference between the azimuth angle α and the azimuth angle β.
As shown in FIG. 8, the flash device 2 is provided with an angle measurement unit 26 composed of an azimuth angle sensor and microphones MIC2L and MIC2R, similar to the angle measurement unit 14 in the imaging device 1. FIG. 8 shows a configuration example of the flash device 2 in the fourth embodiment.

The angle measurement unit 26 measures an azimuth angle δ (not shown), and the external sound output unit 23 performs FM modulation on the measured azimuth angle δ and transmits it to the imaging apparatus 1. Then, the external sound input unit 12 performs FM demodulation on the input information on the azimuth angle δ and outputs the information to the control unit 18. The control unit 18 outputs the FM demodulated azimuth angle δ to the angle measurement unit 14. The angle measurement unit 14 calculates an angle θ3 that is an angle difference between the azimuth angle δ and the azimuth angle α, and outputs the calculated angle θ3 to the sound information processing unit 16.
Here, the azimuth angle δ is parallel to the two-dimensional plane in which the lines LN11 and L21 exist, and passes through the centers of the microphone surfaces (surfaces of the diaphragm) of the microphones MIC2L and MIC2R in the flash device 2. This is the azimuth angle in the direction perpendicular to the line LN225 (a chain line passing through the flash device 2 in FIG. 7).

The distance calculation unit 15 uses the first distance L11, the second distance L21, the angle θ1, and the angle θ3, the sixth distance L311 between the microphone MIC2R and the subject 100 in the flash device 2, and the microphone MIC2L and the subject 100 in the flash device 2. And a seventh distance L312 is calculated. Here, an intersection of a line LN128 drawn perpendicularly to the line LN11 from the center of the microphone surface of the microphone MIC2L and the line LN11 is defined as a point A.
That is, the distance calculation unit 15 calculates the distance L118 between the points A and C by the following formula.
L118 = L21 cos (θ1)
Further, the distance calculation unit 15 calculates a distance L119 from the point A to the subject 100 by the following equation.
L119 = L11-L118
Further, the distance calculation unit 15 calculates a distance L128 from the center of the microphone surface of the microphone MIC2L to the point A by the following equation.
L128 = L21sin (θ1)

Further, the distance calculation unit 15 calculates a distance L211 from the point A to the point D by the following formula. Here, the point D is an intersection of the line LN225 (a line that forms an angle θ3 with the line LN128 from the microphone MIC2L) and the line LN11.
L211 = L128tan (θ3)
Further, the distance calculation unit 15 calculates a distance L213 between the point D and the point C by the following formula.
L213 = L118−L211
In addition, the distance calculation unit 15 calculates a distance L225 from the center of the microphone surface of the microphone MIC2L to the point D by the following equation.
L225 = (L213 ² + L21 ² −2 × L213 × L21 × cos (θ1)) ^1/2

In addition, the distance calculation unit 15 calculates a distance L312 from the center of the microphone surface of the microphone MIC2L to the subject 100 using the following formula.
L312 = (L225 ² + (L119 + L211) ² −2 × L225 × (L119 + L211) × cos (θ4)) ^1/2
Here, θ4 is an angle formed by the line LN225 and the line LN11.
Further, the distance calculation unit 15 calculates a distance L311 from the microphone center of the microphone MIC2R to the subject 100 by the following formula.
L311 = ((L225 + L20) ² + (L119 + L211) ² −2 × (L225 + L20) × (L119 + L211) × cos (θ4)) ^1/2
Here, L20 is the distance between the center of the microphone surface of the microphone MIC2L and the center of the makeup surface of the microphone MIC2R, and is set in the distance calculation unit 15 in advance.
The distance calculation unit 15 also calculates the distance L111 between the microphone MIC11 and the subject 100 and the distance L112 between the microphone MIC12 and the subject 100, as in the third embodiment.

By the calculation processing of the distance calculation unit 15 described above, the distance L112 between the microphone MIC12 and the subject 100, the distance L111 between the microphone MIC11 and the subject 100, the distance L312 between the microphone MIC2L and the subject 100, and the distance L311 between the microphone MIC2R and the subject 100. Is required.
The sound information processing unit 16 subtracts the distance L311 from the distance L111 to obtain a distance difference SB1 between the distance L111 and the distance L311, and subtracts the distance L312 from the distance L112 to obtain a distance difference between the distance L112 and the distance L312. SB2 is obtained.
The sound information processing unit 16 divides the distance difference SB1 by the sound velocity c, and the sound information of the microphone MIC11 and the MIC2L obtain the propagation delay time Td1 in the external sound information of the microphone MIC2R. Similarly, the distance difference SB2 Is divided by the sound speed c to determine the propagation delay time Td2 between the sound information of the microphone MIC12 and the external sound information of the microphone MIC2L.

Further, the sound information processing unit 16 obtains an amplification factor γ1 by which the sound pressure of the external sound information of the microphone MIC2R is combined with the sound pressure of the sound information of the microphone MIC11 by the following expression.
γ1 = (L311 / L111) ²
Similarly, the sound information processing unit 16 obtains an amplification factor γ2 by which the sound pressure of the external sound information of the microphone MIC2L is combined with the sound pressure of the sound information of the microphone MIC12 by the following formula.
γ2 = (L312 / L112) ²
The sound information processing unit 16 adjusts the sound pressure of the sound information of the microphone MIC2R to the microphone MIC11 with the amplification factor γ1, and delays the sound information of the microphone MIC2R with the propagation delay time Td1 to obtain the phase of the sound information of the microphone MIC11. Correct the alignment.
Similarly, the sound information processing unit 16 adjusts the sound pressure of the sound information of the microphone MIC2L to the microphone MIC12 by the amplification factor γ2, and delays the sound information of the microphone MIC2L by the propagation delay time Td2, thereby Perform correction to match the phase.

After matching the sound pressure and phase of the sound information and the external sound information, the sound information processing unit 16 compares the sound information of the microphone MIC11 and the external sound information of the microphone MIC2R with the same phase, and the sound information of the microphone MIC11. Difference data D1 is obtained as a difference in sound pressure (signal amplitude level) between the external sound information of the microphone MIC2R and the signal.
Then, the sound information processing unit 16 performs correction to subtract the difference data D1 from the sound information of the microphone MIC11, performs correction to remove the noise sound, obtains the corrected sound information of the microphone MIC11, and calculates the time of the image data The information is written and stored in the storage unit 19 corresponding to the information.

Similarly, the sound information processing unit 16 compares the sound information of the microphone MIC12 and the external sound information of the microphone MIC2L in the same phase, and calculates the difference in sound pressure between the sound information of the microphone MIC12 and the external sound information of the microphone MIC2L. The difference data D2 is obtained.
Then, the sound information processing unit 16 performs correction to subtract the difference data D2 from the sound information of the microphone MIC12, performs correction to remove the noise sound, obtains the corrected sound information of the microphone MIC12, and obtains the time of the image data The information is written and stored in the storage unit 19 corresponding to the information.
Further, when the sound information processing unit 16 stores the sound information of the microphone MIC11 and the microphone MIC12 in the storage unit 19, the right sound information and the left sound information are stored in the storage unit 19 so that the right sound information or the left sound information can be identified. A storage area is set as sound information.

  Further, the distance L11, the distance L21, the angle θ1 and the angle θ3 are measured in advance by another measuring device, and the user inputs to the imaging device 1, and the inputted distance L11, distance L21, angle θ1 and angle θ3 are The control unit 18 may be configured to output to the distance calculation unit 15 and the sound information processing unit 16.

<Fifth Embodiment>
Hereinafter, an imaging system having an imaging device and a flash device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a block diagram illustrating a configuration example of the imaging system according to the embodiment. The same components as those in the fourth embodiment are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, differences from the fourth embodiment will be described. In the fifth embodiment, a flash device 4 is newly provided in addition to the configuration of the fourth embodiment. The flash device 4 has the same configuration as the flash device 2 of FIG. The microphones provided in the flash device 4 are the microphone MIC4L and the microphone MIC4R.
In the present embodiment, the sound information of the microphone MIC12 is corrected by the external sound information of the microphone MIC4L and the microphone MIC4R, and the sound information of the microphone MIC11 is corrected by the external sound information of the microphone MIC2L and the microphone MIC2R.

Similar to the fourth embodiment, the imaging device 1 inputs an azimuth angle δ (not shown) from the flash device 2 and an azimuth angle σ (not shown) from the flash device 4. Here, the azimuth angle σ is parallel to a two-dimensional plane where the lines LN11 and LN41 exist, and a line LN445 passing through the center of the microphone surface (surface of the diaphragm) of the microphone MIC4L and the microphone MIC4R in the flash device 2. Is the azimuth angle in the vertical direction.
The angle measurement unit 14 calculates an angle θ6 that is an angle difference between the azimuth angle σ and the azimuth angle α.
The distance calculation unit 15 uses the angle θ2, the angle θ6, the distance L11, and the distance L41 in the same manner as the distance L311 and the distance 312 are calculated using the angle θ1, the angle θ3, the distance L11, and the distance L21. A distance L511 and a distance L512 are calculated. Here, the distance L41 is the distance between the microphone MIC4R and the point C, the distance L511 is the distance between the subject 100 and the microphone MIC4R, and the distance L512 is the distance between the subject 100 and the microphone MIC4L.

As in the fourth embodiment, the distance calculation unit 15 includes a distance difference SB11 between the distance L111 and the distance L311, a distance difference SB12 between the distance L111 and the distance L312, a distance difference SB41 between the distance L112 and the distance L511, and a distance L112. And a distance difference SB42 between the distance L512 and the distance L512.
The sound information processing unit 16 divides each of the distance differences SB11, SB12, SB41, and SB42 by the sound speed c, the propagation delay time Td11 between the sound information of the microphone MIC11 and the external sound information of the microphone MIC2R, and the sound information of the microphone MIC11. Delay time Td12 between the microphone MIC2L and the external sound information of the microphone MIC12, propagation delay time Td41 between the sound information of the microphone MIC12 and the external sound information of the microphone MIC4R, and propagation delay time of the sound information of the microphone MIC12 and the external sound information of the microphone MIC4L Each of Td42 is calculated.
In addition, the sound information processing unit 16 obtains amplification factors γ11 and γ12 that match the sound pressures of the microphones MIC2R and MIC2L with the sound pressure of the sound information of the microphone MIC11 by the following formula.
γ11 = (L311 / L111) ²
γ12 = (L312 / L111) ²
Similarly, the sound information processing unit 16 obtains amplification factors γ41 and γ42 by which the sound pressure of the external sound information of the microphones MIC4R and MIC4L is combined with the sound pressure of the sound information of the microphone MIC12 by the following formula.
γ41 = (L511 / L111) ²
γ42 = (L512 / L111) ²

Here, the sound information processing unit 16 shifts the phase of the external sound information of the microphone MIC2R by the propagation delay time Td11 to match the phase of the sound information of the microphone MIC11. Similarly, the sound information processing unit 16 changes the phase of the external sound information of the microphone MIC2L. The phase is shifted by the propagation delay time Td12 to match the phase of the sound information of the microphone MIC11.
In addition, the sound information processing unit 16 multiplies the sound pressure of the external sound information of the microphone MIC2R by the amplification factor γ11 to match the sound pressure of the sound information of the microphone MIC11. Similarly, the sound of the external sound information of the microphone MIC2L The pressure is multiplied by an amplification factor γ12 to match the sound pressure of the sound information of the microphone MIC11.
Further, the sound information processing unit 16 shifts the phase of the external sound information of the microphone MIC4R by the propagation delay time Td41 to match the phase of the sound information of the microphone MIC12. Similarly, the phase of the external sound information of the microphone MIC4L is The phase is shifted by the propagation delay time Td42 to match the sound information phase of the microphone MIC12.
Further, the sound information processing unit 16 multiplies the sound pressure of the external sound information of the microphone MIC4R by the amplification factor γ41 to match the sound pressure of the sound information of the microphone MIC12, and similarly, the sound of the external sound information of the microphone MIC4L. The pressure is multiplied by an amplification factor γ42 to match the sound pressure of the sound information of the microphone MIC12.

Further, since the sound information processing unit 16 synthesizes the external sound information of the microphone MIC2L and the external sound information of the microphone MIC2R, a coefficient μ1 for multiplying both the external sound information at the time of synthesis is set. That is, the sound information processing unit 16 multiplies the external sound information in which the sound pressure of the microphone MIC2L is corrected by the coefficient μ1, and multiplies the external sound information in which the sound pressure of the microphone MIC2L is corrected by a coefficient (1-μ1). Then, the multiplication results are added to generate the first external sound information to be compared with the sound information of the microphone MIC11.
Similarly, since the sound information processing unit 16 synthesizes the external sound information of the microphone MIC4L and the external sound information of the microphone MIC4R, a coefficient μ2 for multiplying both the external sound information at the time of synthesis is set. That is, the sound information processing unit 16 multiplies the external sound information in which the sound pressure of the microphone MIC4L is corrected by the coefficient μ2, and multiplies the external sound information in which the sound pressure of the microphone MIC4R is corrected by a coefficient (1-μ2). Then, the multiplication results are added to generate second external sound information to be compared with the sound information of the microphone MIC12.

The sound information processing unit 16 compares the sound information of the microphone MIC11 and the first external sound information in the same phase, and the difference in sound pressure (signal amplitude level) between the sound information of the microphone MIC11 and the first external sound information. As a result, difference data D1 is obtained.
Then, the sound information processing unit 16 performs correction to subtract the difference data D1 from the sound information of the microphone MIC11, performs correction to remove the noise sound, obtains the corrected sound information of the microphone MIC11, and calculates the time of the image data The information is written and stored in the storage unit 19 corresponding to the information.
Similarly, the sound information processing unit 16 compares the sound information of the microphone MIC12 and the second external sound information in the same phase, and calculates difference data as a difference in sound pressure between the sound information of the microphone MIC12 and the second external sound information. Find D2.
Then, the sound information processing unit 16 performs correction to subtract the difference data D2 from the sound information of the microphone MIC12, performs correction to remove the noise sound, obtains the corrected sound information of the microphone MIC12, and obtains the time of the image data The information is written and stored in the storage unit 19 corresponding to the information.
Further, when the sound information processing unit 16 stores the sound information of the microphone MIC11 and the microphone MIC12 in the storage unit 19, the right sound information and the left sound information are stored in the storage unit 19 so that the right sound information or the left sound information can be identified. A storage area is set as sound information.

  In addition, the distance L11, the distance L21, the distance L41, the angle θ1, the angle θ2, the angle θ3, and the angle θ6 are measured in advance by another measuring device, and the user inputs to the imaging apparatus 1, and the input distance L11, distance The control unit 18 may output the L21, the angle θ1, and the angle θ3 to the distance calculation unit 15 and the sound information processing unit 16.

  Note that a program for realizing the functions of the distance calculation unit 15 and the sound information processing unit 16 in FIG. 2 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system. By executing this processing, the sound information of the microphone provided in the imaging apparatus 1 may be corrected. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer system” includes a WWW system having a homepage providing environment (or display environment). The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system. Further, the “computer-readable recording medium” refers to a volatile memory (RAM) in a computer system that becomes a server or a client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included.

  The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Imaging device 2, 4 ... Flash apparatus 11 ... Imaging part 12 ... External sound information input part 13 ... Distance measuring part 14, 26 ... Angle measuring part 15 ... Distance calculating part 16 ... Sound information processing part 17 ... Transmitting part 18, DESCRIPTION OF SYMBOLS 22 ... Control part 19, 25 ... Memory | storage part 21 ... Flash emission part 23 ... External sound output part 24 ... Reception part MIC11, MIC12, MIC2L, MIC2R, MIC4L, MIC4R ... Microphone

Claims (9)

An imaging unit that captures a subject image and outputs an image signal;
A microphone attached to itself,
An external sound information input unit for inputting external sound information from an external microphone of a flash device that is not attached to the flash device;
A sound information processing unit that corrects the sound information acquired by the microphone with the external sound information and sets the corrected sound information data;
A sound information recording unit that records the corrected sound information data in a storage unit in association with the image signal.   The sound information processing unit compares the sound information with the external sound information, detects a sound information signal measured only in the sound information as difference data, and removes the difference data from the sound information. The imaging apparatus according to claim 1, wherein the correction sound information data is generated.   The sound information processing unit determines whether the sound information and the external sound information are based on a difference in distance between a first distance between the subject and the microphone and a second distance between the flash device and the microphone. The sound pressure ratio and phase difference are obtained, and the sound pressure and phase of the external sound information are made to correspond to the sound information by the sound pressure ratio and phase difference, and the sound information is corrected. Imaging device.   When the sound information processing unit receives a virtual distance from the virtual position of the subject to the microphone, the sound information at the first distance is converted into virtual sound information that is sound pressure and phase at the virtual distance. The imaging apparatus according to claim 3, wherein the virtual sound information is corrected by converting the virtual position from the virtual position to the flash device as the second distance.   When the level of the difference data is greater than or equal to a set value, the sound information processing unit associates the sound information during a period in which difference data greater than or equal to the set value exists with the sound information by the sound pressure ratio and phase difference. 5. The imaging apparatus according to claim 3, wherein the imaging apparatus is replaced with the external sound information.   When a plurality of microphones are provided, a distance difference between a first distance between the subject and each of the plurality of microphones and a second distance between the flash device and each of the plurality of microphones is obtained, The imaging apparatus according to claim 2, wherein the sound information of each microphone is corrected based on a sound pressure ratio and a phase difference corresponding to the distance difference.   When a plurality of microphones and flash devices are provided, a first distance between each of the subject and the plurality of microphones and a second distance between each of the plurality of flash devices and the plurality of microphones. 6. The imaging apparatus according to claim 2, wherein a correction process for sound information of each microphone is performed using the distance and the external sound information from a plurality of external microphones.   The imaging apparatus according to claim 3, further comprising a distance measuring unit that measures the first distance and the second distance. An imaging system that includes an imaging device and a flash device that is disposed at a different location from the imaging device and that irradiates the subject with light when imaging by the imaging device,
An irradiating unit that irradiates light to a subject by an imaging signal indicating an imaging timing from the imaging device;
An external microphone and an external sound information output unit that transmits external sound information acquired by the external microphone to the imaging device,
The imaging device is
An imaging unit that captures a subject image of the subject and outputs an image signal;
A microphone mounted on the imaging device;
External sound information acquired by the external microphone, an external sound information input unit that inputs from the flash device,
A sound information processing unit that corrects the sound information acquired by the microphone with the external sound information and sets the corrected sound information data;
A sound information recording unit that records the correction sound information data in a storage unit in association with the image signal.

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