JP4722731B2 - Shooting position specifying system, shooting position specifying device, and shooting position specifying method - Google Patents

Description

  The present invention relates to a shooting position specifying system, a shooting position specifying apparatus, and a shooting position specifying method, in particular, a shooting position specifying system, a shooting position specifying apparatus, and a shooting position specifying for calculating a position where an image is shot using a plurality of terminals. Regarding the method.

Conventionally, what is described in Patent Document 1 is known as a photographing apparatus such as a camera that can grasp where a photographed image is photographed. This photographing device acquires information on the position of the photographing device from GPS (Global Positioning System) at the time of photographing a subject, and stores the photographed image and the information on the photographed position in association with each other.
JP 2005-203994 A

  However, the photographing apparatus described in Patent Document 1 has a problem that the position at the time of photographing cannot be accurately specified because the position specifying accuracy using GPS is about several meters. In addition, in order to specify a position using GPS, it is necessary to receive radio waves from a satellite. Therefore, there has been a problem in that an imaging position cannot be specified in a building or underground.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shooting position specifying system, a shooting position specifying apparatus, and a shooting that can accurately determine the position at which an image is shot even in an environment where GPS cannot be used. The object is to provide a location method.

  The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a shooting position specifying system including a shooting position specifying device and at least three terminals. The apparatus includes an instruction obtaining unit that obtains a photographing instruction, a photographing unit that photographs a subject when the photographing instruction is obtained, a first storage unit that previously stores positions of the at least three terminals, and the photographing An electromagnetic wave emitting means for emitting an electromagnetic wave when an instruction is acquired, a sound wave receiving means for receiving a sound wave transmitted from the at least three terminals, a time when the sound wave is received, and a time when the electromagnetic wave is emitted Time acquisition means, distance calculation means for calculating the distance to each terminal based on the difference between the time when the sound wave was received and the time when the electromagnetic wave was emitted, and the sound speed, and the distance to each terminal Position calculating means for calculating the position of the self-photographing position specifying device based on the second storage means for associating and storing the photographing result of the photographing means and the position of the self-photographing position specifying device calculated by the position calculating means; The terminal has an electromagnetic wave receiving means for receiving an electromagnetic wave radiated by the electromagnetic wave radiating means, and a sound wave transmitting means for emitting a sound wave when the electromagnetic wave is received. System.

  Further, in the invention according to claim 2, the first storage unit stores in advance the positions of the at least three terminals and the identification information of the terminals in association with each other, and the sound wave reception unit When receiving a sound wave transmitted from at least three terminals, the terminal identifies the sound wave transmitted from which terminal based on the identification information, and the sound wave transmitting means receives the electromagnetic wave. 2. The photographing position specifying system according to claim 1, wherein a sound wave including identification information of the terminal is transmitted.

  According to a third aspect of the present invention, the electromagnetic wave radiation means radiates an electromagnetic wave a plurality of times when the photographing instruction is acquired, and the position calculation means receives the distance to each terminal and each terminal. 3. The photographing position specifying system according to claim 1, wherein the position of the self-photographing position specifying device is calculated based on the number of sound waves that have been made.

  According to a fourth aspect of the present invention, the photographing position specifying device further includes a direction measuring unit that measures a direction in which a subject is shot, and the second storage unit stores information taken by the shooting unit. 4. The photographing position specifying system according to claim 1, further storing the azimuth measured by the azimuth measuring unit in association with each other. 5.

  Further, the invention described in claim 5 further includes an elevation angle measuring unit that calculates an elevation angle of the self-portrait position specifying device at the time of shooting based on the acceleration of gravity, and the second storage unit includes: The imaging position specifying system according to any one of claims 1 to 4, wherein the elevation angle calculated by the elevation angle calculation means is further stored in association with the captured information.

  According to a sixth aspect of the present invention, there is provided an instruction acquisition unit for acquiring a shooting instruction, a shooting unit for shooting a subject when the shooting instruction is acquired, and a first position that stores in advance the positions of at least three terminals. Storage means, electromagnetic wave emission means for emitting electromagnetic waves when the imaging instruction is acquired, sound wave reception means for receiving sound waves transmitted from the at least three terminals, time of reception of the sound waves and electromagnetic waves Time acquisition means for acquiring the radiated time, distance calculation means for calculating the distance to each terminal based on the difference between the time when the sound wave was received and the time when the electromagnetic wave was radiated, and the sound speed; The position calculation means for calculating the position of the self-portrait position specifying device based on the distance of the camera, the shooting result by the shooting means and the position of the self-capture position specifying device calculated by the position calculation means are described in association with each other. A photographing position determination device, characterized in that a second storage means for.

  The invention according to claim 7 is a photographing position specifying device attached to the photographing device, wherein first storage means for storing in advance the positions of at least three terminals, and electromagnetic waves radiated from the photographing device. Electromagnetic wave receiving means for receiving sound waves, sound wave receiving means for receiving sound waves transmitted from the at least three terminals, time acquisition means for acquiring the time when the sound waves were received and the time when the electromagnetic waves were received, and the sound waves Distance calculating means for calculating the distance to each terminal based on the difference between the time when the electromagnetic wave is received and the time when the electromagnetic wave is radiated, and the speed of sound, and the position of the self-capturing position specifying device based on the distance to each terminal. A photographing position specifying device comprising: a position calculating means for calculating; and a second storage means for storing the position of the self-photographing position specifying device calculated by the position calculating means.

  The invention according to claim 8 is a shooting position specifying method using a shooting position specifying device and at least three terminals, an instruction acquiring process for acquiring a shooting instruction by the shooting position specifying device, When a shooting instruction is acquired, a shooting process of shooting a subject by the shooting position specifying device, a first storage process of previously storing the positions of the at least three terminals by the shooting position specifying device, and the shooting instruction An electromagnetic wave emission process in which electromagnetic waves are radiated by the imaging position specifying device when acquired, an electromagnetic wave reception process in which electromagnetic waves radiated in the electromagnetic wave emission process are received by the at least three terminals, A sound wave transmission process for transmitting the sound from the at least three terminals, and a sound wave transmitted from the at least three terminals to the imaging position specifying device. Difference between the time of receiving the sound wave, the time of receiving the sound wave and the time of emitting the electromagnetic wave, the time acquisition process of acquiring the time of emitting the electromagnetic wave by the imaging position specifying device, and the time of receiving the sound wave and the time of emitting the electromagnetic wave The distance calculation process of calculating the distance to each terminal based on the sound speed and the shooting position specifying device, and the position of the own shooting position specifying device based on the distance to each terminal is calculated using the shooting position specifying device. A position calculation process, and a second storage process in which the shooting position specifying device stores the shooting result in the shooting process and the position of the shooting position specifying device calculated in the position calculation process in association with each other. This is a characteristic shooting position specifying method.

In the photographing position specifying device of the present invention, the positions of at least three terminals are stored in advance, electromagnetic waves are emitted when a photographing instruction is acquired, and sound waves transmitted from at least three terminals are received and sound waves are received. The distance to each terminal is calculated based on the difference between the time at which the sound wave was received and the time at which the electromagnetic wave was radiated and the speed of sound, and based on the distance to each terminal. The position of the photographing position specifying device is calculated, and the photographing result and the position of the self photographing position specifying device are stored in association with each other.
As a result, even in a room where GPS radio waves cannot be received, after the user installs at least three terminals in the room, the user gives a shooting instruction to the shooting position specifying device and takes a shot. Can be recorded in association with the exact position where the image is taken. Therefore, the user can easily manage the captured images, and can prevent the user from knowing which image was captured where.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing an example of the configuration of an imaging position specifying system according to the first embodiment of the present invention. The shooting position specifying system includes a shooting position specifying device 10a and terminals 20a, 20b, and 20c. The photographing position specifying device 10a is a device used by an administrator of the photographing position specifying system and has a camera function for photographing the subject 60.
The terminals 20a to 20c are devices that are installed around the subject 60 before the photographing position specifying system administrator or the like takes a picture of the subject 60 with the photographing position specifying device 10a. As the terminals 20a to 20c, for example, ultrasonic tags that transmit sound waves such as ultrasonic waves can be used.

Here, the terminals 20a to 20c are attached to the tripods 30a to 30c and installed at predetermined positions on the floor 40 in the building. The installation positions of the terminals 20a to 20c are measured in advance by an administrator of the photographing position specifying system. Here, the installation positions of the terminals 20a, 20b, and 20c are (x, y, z) = (x _a , y _a , z _a ), (x _b , y _b , z _b ), and (x _c , y), respectively. _c , z _c ) will be described. However, the predetermined position of the floor 40 is the origin (x, y, z) = (0, 0, 0).

  FIG. 2 is a block diagram showing an example of the configuration of the photographing position specifying device 10a (FIG. 1) according to the first embodiment of the present invention. The imaging position specifying device 10a includes an input unit 11 (instruction acquisition unit), an imaging unit 12 (imaging unit), a light emitting unit 13 (electromagnetic wave emission unit), a sound wave reception unit 14 (sound wave reception unit), and a time acquisition unit 15 (time). Acquisition unit), control unit 16 (distance calculation unit, position calculation unit), storage unit 17 (first storage unit, second storage unit), azimuth measurement unit 18 (azimuth measurement unit), elevation angle measurement unit 19 (elevation angle) Measuring means).

The input unit 11 includes buttons for operating the shooting position specifying device 10a and the like, and inputs terminal position information, frequency information, shooting instructions, and the like based on an operation by an administrator of the shooting position specifying system. is there. For example, when the display position screen is provided in the photographing position specifying device 10a, the button is used to directly touch and input a portion displayed on the screen, or to set the cursor on the content displayed on the screen. These buttons are used to designate and determine the upper, lower, left, and right of the button, and buttons with predetermined numbers, symbols, characters, and instruction contents.
Here, the terminal position information refers to the installation positions (x, y, z) of the terminals 20a to 20c = (x _a , y _a , z _a ), (x _b , y _b , z _b ), (x _c , y _c , z _c ) information. Also, the frequency information, the frequency _f a of the sound waves respectively assigned to the terminal 20 a to 20 _c, refers to information of f b, _{f c.} Note that the frequencies f _a , f _b , and f _c are selected as frequencies that are prime to each other so that “beat” does not easily occur when they overlap.
The imaging unit 12 images the subject 60 (FIG. 1) and generates image information such as JPEG (Joint Photographic Experts Group). The light emitting unit 13 is a device that emits light according to the same principle as that of a flash, has a function of shielding electromagnetic noise generated during light emission, and radiates light around the photographing position specifying device 10a.
The electromagnetic wave here refers to a wave of energy generated by the interaction of electricity and magnetism, such as radiation, light, radio waves, electromagnetic fields, and the like.

The sound wave receiving unit 14 includes a microphone or the like, and receives sound waves transmitted from the terminals 20a to 20c. The time acquisition unit 15 includes a clock circuit, for example, and acquires a time t ₀ emitted by the light emitting unit 13 and a time such as the current time.
The control unit 16 includes, for example, a one-chip microcomputer or the like, and is acquired by the time acquisition unit 15, the time t ₀ emitted by the light emitting unit 13, and the time t _a when the sound waves transmitted from the terminals 20 a to 20 c are received. t _b, by the _{t c,} obtains these time _{t a,} t b, the difference between _{t c} and the time _{t 0,} respectively, by multiplying the sound velocity _{v s} to their difference, capturing localization device 10a and the terminal 20a~ Distances D _a , D _b , and D _c with respect to 20c are calculated. The distances D _a , D _b , and D _c can be expressed by the following formulas (1) to (3), respectively.

_{D a = v s (t a} -t 0) ··· formula (1)
D _b = v _s (t _b −t ₀ ) (2)
D _c = v _s (t _c −t ₀ ) (3)

On the other hand, the installation positions (x, y, z) of the terminals 20a to 20c recorded in the storage unit 17 = (x _a , y _a , z _a ), (x _b , y _b , z _b ), (x _c , Y _c , z _c ), distances D _a , D _b , D _c between the imaging position specifying device 10a and the terminals 20a to 20c, and the position (x, y, z) = (x ₀ ) of the imaging position specifying device 10a. , Y ₀ , z ₀ ), the following expressions (4) to (6) are satisfied.

D _a ² = (x _a −x ₀ ) ² + (y _a −y ₀ ) ² + (z _a −z ₀ ) ² Formula (4)
^{_{D b 2 = (x b -x}} 0) 2 + (y b -y 0) 2 + (z b -z 0) 2 ··· Equation (5)
^{_{D c 2 = (x c -x}} 0) 2 + (y c -y 0) 2 + (z c -z 0) 2 ··· Equation (6)

  The following formulas (7) and (8) are obtained by solving the above formulas (1) to (6).

y ₀ = Ax ₀ + B (7)
z ₀ = Cx ₀ + D (8)

In equations (7) and (8), A, B, C, and D are predetermined coefficients. By substituting equation (7) and (8) into equation (4), two x ₀ in the plane mirror image relation to a symmetry plane containing the triangle made of three points of the terminal 20a~20c is obtained.
Similarly, two y ₀ and z ₀ having the same mirror image relationship are obtained. Which of the two positions (x ₀ , y ₀ , z ₀ ) having the same mirror image relationship is selected is determined by giving an instruction from the input unit 11 by an administrator of the imaging position specifying system. When the terminals 20a to 20c are installed on the floor, the one having the larger z coordinate is automatically selected from two positions (x ₀ , y ₀ , z ₀ ) having the same mirror image relationship. May be. In addition, when the terminals 20a to 20c are installed on the ceiling, the one having the smaller z coordinate is automatically selected from two positions (x ₀ , y ₀ , z ₀ ) having the same mirror image relationship. May be.
In addition, in the above formulas (7) and (8), the case where y ₀ and z ₀ are expressed as x ₀ is described, but x ₀ and z ₀ are expressed as y ₀ or x ₀ and by representing the y ₀ as an expression of z _0, it may be calculated the position of the photographing position determination device 10a.
The storage unit 17 stores terminal location information (x _a , y _a , z _a ), (x _b , y _b , z _b ), (x _c , y _c , z _c ), frequency information f _a , f _b , f _c, information of the sound velocity v _s, also stores a time obtained the time and images obtained with these positions. Since the sound speed changes according to conditions such as the temperature, the administrator of the photographing position management system according to the present embodiment may input the sound speed from the input unit 11. Further, the photographing position specifying device 10a is placed at a place where the terminal 20a is installed, and then light is emitted from the light emitting unit 13 of the photographing position specifying device 10a, and a sound wave transmitted from another terminal 20b is received to emit light. The sound velocity in the environment at the time of shooting may be measured based on the time from when the unit 13 emits light until the sound wave of the terminal 10b is received and the distance between the terminal 20a and the terminal 20b.

FIG. 3 is a diagram showing an example of information recorded in advance in the storage unit 17 of the photographing position specifying device 10a (FIG. 1) according to the first embodiment of the present invention. As shown in FIG. 3, the storage unit 17 is associated with a terminal name (terminal 20a or the like), and terminal position information (x coordinate (x _a or the like), y coordinate (y _a or the like) of the terminals 20a to 20c. , Z coordinates (such as z _a )) and frequency information (such as f _a ) are recorded.

Returning to FIG. 2, the azimuth measuring unit 18 includes a azimuth magnet and the like, and measures the azimuth in which the subject 60 (FIG. 1) exists with respect to the imaging position specifying device 10a.
The elevation angle measurement unit 19 includes an acceleration sensor that measures the direction of gravity, and measures the elevation angle of the imaging position specifying device 10a from the relationship between the direction of gravity and the vertical direction of the imaging position specifying device 10a. For example, when the lens of the photographing position specifying device 10a is facing the direction of the floor 40, the elevation angle is −90 degrees, and when the lens is facing the direction parallel to the ground, the elevation angle is 0 degrees and facing the ceiling. In this case, the elevation angle is determined to be 90 degrees.

FIG. 4 is a block diagram showing an example of the configuration of the terminal 20a (FIG. 1) according to the first embodiment of the present invention. Note that the configurations of the terminals 20b and 20c are the same as the configuration of the terminal 20a, and thus detailed description thereof is omitted. The terminal 20a includes a light receiving unit 21 (electromagnetic wave receiving unit), a control unit 22, and a sound wave transmitting unit 23 (sound wave transmitting unit).
For example, in the present embodiment, the light receiving unit 21 includes an optical sensor, and receives light emitted from the light emitting unit 13 of the imaging position specifying device 10a. When the light receiving unit 21 receives the light emitted from the light emitting unit 13 of the imaging position specifying device 10a, the control unit 22 transmits a sound wave from the sound wave transmitting unit 23. Wave transmission unit 23, a sound wave of a frequency f _a which is assigned to the terminal 20a, transmits to the circumference of the photographing position determination device 10a.

Next, processing of the photographing position specifying system according to the first embodiment of the present invention will be described.
FIG. 5 is a flowchart showing an example of processing of the imaging position specifying device 10a according to the first embodiment of the present invention.
First, the administrator of the photographing position specifying system installs the terminals 20a to 20c around the subject 60 to be photographed. Then, the administrator has the three-dimensional positions (x, y, z) = (x _a , y _a , z _a ), (x _b , y _b , z _b ), (x _c , y _c , z _c ) is measured by surveying or the like and input from the input unit 11 as terminal position information. Further, the user of the photographing position specifying device 10a inputs the sound wave frequencies f _a , f _b , and f _c specific to the terminals 20a to 20c from the input unit 11 as frequency information. As shown in FIG. 3, the control unit 16 records terminal location information and frequency information in the storage unit 17 in association with the terminal name (step S101).

Next, the control unit 16 determines whether or not a shooting instruction is input from the input unit 11 (step S102). The photographing instruction is input by the input unit 11 when the administrator of the photographing position specifying system photographs a subject.
If no shooting instruction is input from the input unit 11, “NO” is determined in step S 102, and the process waits until a shooting instruction is input to the input unit 11. On the other hand, when a shooting instruction is input to the input unit 11, “YES” is determined in step S102, and the control unit 16 causes the light emitting unit 13 to emit light, thereby emitting light around the shooting position specifying device 10a. Radiate (step S103). The control unit 16 records a light emission time t ₀ that is a time at which light is emitted from the light emitting unit 13 in the storage unit 16.
Further, the control unit 16 captures the subject by the capturing unit 12 (step S104), and records the captured image and the time at that time in the storage unit 17 in association with each other.

On the other hand, the control unit 22 of the terminal 20a~20c is, when receiving the light emitted from the light emitting unit 13 of the photographing position determination device 10a by the light receiving unit 21, a frequency _f a of wave transmission unit _23, f b, _{f c} Each sound wave is transmitted.

The sound wave receiving unit 14 of the imaging position specifying device 10a receives sound waves transmitted from the sound wave transmitting units 23 of the terminals 20a to 20c, respectively (step S105). The control unit 16 sets the sound wave reception times t _a , t _b , and t _c that are times when the sound wave reception unit 14 receives sound waves transmitted from the terminals 20 a to 20 _c to the current time transmitted from the time acquisition unit 15. Identify based on. Further, the control unit 16 specifies from which terminal the sound wave received by the sound wave receiving unit 14 is transmitted based on the correspondence relationship between the terminal name and the frequency information stored in the storage unit 17 in step S101. And recorded in the storage unit 17 (step S106).

The control unit 16 calculates the above-described formula (1) from the sound wave reception times t _a , t _b and t _c for the sound waves transmitted from the terminals 20 a to 20 _c and the light emission time t ₀ stored in the storage unit 17. ) To Equations (3), distances D _a , D _b , and D _c between the imaging position specifying device 10a and the terminals 20a to 20c are calculated (step S107).
Further, the control unit 16 uses the distances D _a , D _b , and D _c to _calculate the three-dimensional position (x, y, z) of the imaging position specifying device 10a from the expressions (4) to (8). = (X ₀ , y ₀ , z ₀ ) is calculated (step S108).

And the control part 16 acquires the azimuth | direction information about which direction the imaging | photography position specific device 10a was facing from the azimuth | direction measurement part 18 when image | photographing the to-be-photographed object 60 by step S104 (step S109). In addition, when the subject 60 is imaged in step S104, the control unit 16 acquires elevation angle information about how many elevation angles of the imaging position specifying device 10a are from the elevation angle measurement unit 19 (step S110).
Then, the control unit 16 associates the image of the subject 60 photographed in step S104, the photographing information, and the photographing time, and records them in the storage unit 17 in the photographing order (step S111). Here, the shooting information includes the position information of the shooting position specifying device 10a calculated in step S108, the azimuth information acquired in step S109, and the elevation angle information obtained in step S110.

FIG. 6 is a diagram showing an example of information recorded in the storage unit 17 of the photographing position specifying device 10a (FIG. 1) according to the first embodiment of the present invention. By performing the processing according to the flowchart of FIG. 5, information as illustrated in FIG. 6 is recorded in the storage unit 17. In other words, in association with the image name of the image photographed by the photographing position determination device 10a (such as images p1), the position information (x coordinates indicating the position on the three-dimensional imaging localization device 10a (x _0, etc.), y and coordinates (such as _{y 0),} (such as _{z 0)} z-coordinate), and direction information (such as the north-northeast), the elevation angle information (such as 90 degrees), but are recorded in the storage unit 17 together with the time at that time.

According to the above-described shooting position specifying system according to the first embodiment of the present invention, the shooting position is specified using light and sound waves between the shooting position specifying device 10a and the terminals 20a to 20c. Even in a communication machine room where the use of radio waves is not permitted, it is possible to specify the shooting position of an image, and the burden on the administrator to manage the image can be reduced.
Further, since the terminals 20a to 20c are installed around the photographing position specifying device 10a, and the position of the photographing position specifying device 10a is calculated from the positions of the terminals 20a to 20c, indoors where GPS radio waves cannot be received. The image taken when checking the indoor equipment can be managed together with the shooting position of the image, so that the burden on the administrator or the like can be reduced. In addition, since the position of the photographing position specifying device 10a can be specified more accurately than the GPS that can specify the position only with a precision of several meters, it is a case where a plurality of devices having the same appearance are installed. Even if it exists, the administrator can grasp which device was taken.

In the first embodiment described above, the captured image and the shooting information are separately recorded in the storage unit 17, but may be recorded together as one file. In addition, the captured image and the shooting information are not recorded in the storage unit 17 but are recorded in another storage medium, or, for example, in a PC (Personal Computer) that is a management device of the shooting position specifying system through wireless communication. You may make it transmit.
In the first embodiment described above, when calculating the distance between the imaging position specifying device 10a and the terminals 20a to 20c, only the sound propagation time is considered and the light propagation time is not considered. This is because the light propagation time is negligibly small compared to the sound propagation time.
In the first embodiment described above, when the imaging position specifying device 10a receives a sound wave having the same frequency a plurality of times, it is desirable to specify the position based on the sound wave first received by the imaging position specifying device 10a. . Thereby, it is possible to remove the influence of the sound wave transmitted from the terminal and reflected on the wall or the like and reaching the imaging position specifying device 10a.

Next, an imaging position specifying system according to a modification of the first embodiment of the present invention will be described.
FIG. 7 is a schematic diagram illustrating an example of a configuration of a photographing position specifying system according to a modification of the first embodiment of the present invention. Parts in which the photographing position specifying system according to the present embodiment has the same configuration as that of the photographing position specifying system (FIG. 1) according to the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.
The present embodiment is different from the photographing position specifying device 10a according to the first embodiment in that the photographing position specifying device 10b is attached to the photographing device 70 such as a camera.

FIG. 8 is a block diagram showing an example of the configuration of the imaging position specifying device 10b according to the modification of the first embodiment of the present invention. The parts where the photographing position specifying device 10b according to the present embodiment has the same configuration as the photographing position specifying device 10a (FIG. 2) according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. To do.
The imaging position specifying device 10 a (FIG. 1) according to the first embodiment is different in that it does not have the imaging unit 12 and has a light receiving unit 50 (electromagnetic wave receiving means) instead of the light emitting unit 13. Moreover, the control method by the control part 16 differs.
The light receiving unit 50 includes, for example, an optical sensor, and receives light such as a flash emitted from the photographing device 70 to which the photographing position specifying unit 10b is attached.
In addition, since the structure of the terminals 20a-20c of this embodiment is the same as that of 1st Embodiment, those detailed description is abbreviate | omitted.

Next, processing of the photographing position specifying system according to the modification of the first embodiment of the present invention will be described.
FIG. 9 is a flowchart showing an example of processing of the imaging position specifying device 10b according to the modification of the first embodiment of the present invention. Note that the processing in steps S201 and S203 to S208 is the same as the processing in steps S101 and 105 to S110 (FIG. 5) of the imaging position specifying device 10a according to the first embodiment, and thus detailed description thereof is omitted.
In step S201, terminal location information and frequency information are recorded in the storage unit 17 in association with the terminal name, as in the first embodiment.
In step S202, it is determined whether or not the light receiving unit 50 has received light such as a flash emitted from the imaging device 70 to which the imaging position specifying device 10b is attached.
If the light emitted from the imaging device 70 is not received by the light receiving unit 50, “NO” is determined in step S202, and the process waits until the light emitted from the imaging device 70 is received.
On the other hand, when the light emitted from the imaging device 70 is received by the light receiving unit 50, “YES” is determined in step S202, and the control unit 16 emits light at time t when the light receiving unit 50 receives the light. ₀ is recorded in the storage unit 16. Then, the process proceeds to step S203, and the position of the photographing position specifying device 10b is calculated and the azimuth information and the elevation angle information are acquired (step S203 to step S208), as in the first embodiment.

  In step S209, the control unit 16 records the shooting information in the storage unit 17 in the shooting order. Here, the shooting information includes the position information of the shooting position specifying device 10b calculated in step S206, the azimuth information acquired in step S207, and the elevation angle information obtained in step S208.

According to the above-described photographing position specifying system according to the modification of the first embodiment of the present invention, the photographing position specifying device 10b is attached to the photographing apparatus 70 which is a normal camera having a photographing function and a light emitting function such as a flash. Thus, the storage unit 17 stores information on what position the captured image is captured at which position, in which orientation, and at what elevation angle. Can be recorded.
Therefore, the administrator of the shooting position specifying system can easily manage images by associating the image shot by the shooting device 70 with the shooting information recorded by the shooting position specifying device 10b.

Next, an imaging position specifying system according to the second embodiment of the present invention will be described.
FIGS. 10A and 10B are schematic views showing an example of the configuration of the photographing position specifying system according to the second embodiment of the present invention. FIG. 10A is a plan view showing a state of the ceiling 41 of the room where the subject 60 to be photographed by the photographing position specifying device 10c exists. FIG. 10B is a cross-sectional view illustrating a room in which the subject 60 to be photographed by the photographing position specifying device 10c is present.
The shooting position specifying system includes a shooting position specifying device 10c and terminals 201-224. In the present embodiment, a case where the terminals 201 to 224 are installed in a grid pattern (4 rows × 6 columns) on the ceiling 41 in the building where the subject 60 exists as illustrated in FIG. .

Since the configuration of the terminals 201 to 224 according to the present embodiment is the same as that of the terminal 20a (FIG. 4) according to the first embodiment, detailed description thereof will be omitted.
The configuration of the imaging position specifying device 10c according to the present embodiment is the same as the configuration of the imaging position specifying device 10a (FIG. 2) according to the first embodiment, and thus detailed description thereof is omitted. However, since the control method of the control unit 16 of the photographing position specifying device 10c is different from the control method of the control unit 16 of the photographing position specifying device 10a, the control method will be described next.

Next, processing of the photographing position specifying system according to the second embodiment of the present invention will be described.
FIG. 11 is a flowchart showing an example of processing of the imaging position specifying device 10c according to the second embodiment of the present invention. Note that the processing of steps S301 to S303, S305, and S310 to S312 is the same as the processing (FIG. 5) of steps S101 to S104 and 109 to S111 of the imaging position specifying device 10a according to the first embodiment, and the details thereof. The detailed explanation is omitted.
First, as in the first embodiment, terminal location information and frequency information are recorded in the storage unit 17 in association with the terminal name, and it is determined whether or not a shooting instruction has been input (step S301, S302).

In step S303, the control unit 16 causes the light emitting unit 13 to emit light, thereby radiating light around the photographing position specifying device 10c, and then controlling whether or not the number of times n emitted by the light emitting unit 13 has reached a predetermined number. The determination is made by the unit 16 (step S304). The number of times of light emission is, for example, n = 10 times, and this number of times of light emission is stored in the storage unit 17 in advance.
If the number of times of light emission has not reached the predetermined number, “NO” is determined in the step S304. And the control part 16 makes the light emission part 13 light-emit at predetermined intervals (for example, 100 ms) until the frequency | count of light emission reaches predetermined number of times (step S303). If the number of times of light emission reaches the predetermined number of times, “YES” is determined in the step S304, and the process proceeds to a step S305 to photograph the subject.

On the other hand, the control unit 22 of each of the terminals 201 to 224 is assigned to the own terminal from the sound wave transmitting unit 23 every time the light receiving unit 21 receives light emitted from the light emitting unit 13 of the photographing position specifying device 10c a predetermined number of times. Each frequency sound wave is transmitted.
Depending on the positional relationship between the terminals 201 to 224 and the photographing position specifying device 10c, a difference occurs whether or not the terminals 201 to 224 can receive the light emitted by the light emitting unit 13 of the photographing position specifying device 10c. .

The sound wave receiving unit 14 of the imaging position specifying device 10c receives sound waves transmitted from the light emitting units 13 of the terminals 201 to 224, respectively (step S306). The control part 22 selects three terminals with many reception frequency among the terminals 201-224. Instead of selecting three terminals that receive a large number of received sound waves, it is also possible to select three terminals that have reached the shooting position specifying device 10c earlier.
The control unit 16 transmits sound wave reception times t _a , t _b , and t _c , which are times when the sound waves transmitted from the three terminals selected by the sound wave reception unit 14 are first received, from the time acquisition unit 15. Specify based on the current time. Further, from which terminal the sound wave received by the sound wave receiving unit 14 is transmitted based on the correspondence between the terminal name and the frequency information stored in the storage unit 17 in step S301 (step S307). .

The control unit 16 described above from the sound wave reception times t _a , t _b , t _c for the sound waves transmitted from the three selected terminals and the light emission time t ₀ stored in the storage unit 17, as described above. Based on Expressions (1) to (3), distances D _a , D _b , and D _c between the imaging position specifying device 10a and the terminals 20a to 20c are calculated (step S308).
In addition, the control unit 16 uses the distances D _a , D _b , and D _c to _calculate the three-dimensional position (x, y, z) = (x ₀ , y ₀ , z ₀ ) is calculated (step S309).
Then, as in the first embodiment, azimuth information and elevation angle information are acquired and stored in the storage unit 17 in association with the captured image (steps S310 to S312).

According to the photographing position specifying system according to the second embodiment of the present invention described above, the number of sound waves emitted from the light emitting unit 13 of the photographing position specifying device 10c a predetermined number of times and transmitted from the terminals 201 to 224 in response thereto. Since the terminal used for calculation of the position of the photographing position specifying device 10c is selected using, the photographing position can be obtained more accurately.
In the second embodiment described above, the light emission intensity may be changed when the light emitting unit 13 emits light a predetermined number of times.

  In the first and second embodiments described above, light is emitted from the light emitting unit 13 of the photographing position specifying device and light is received by the light receiving unit 21 of the terminal. However, the present invention is limited to such a configuration. It is not something. For example, a wireless transmission unit that transmits radio waves may be provided instead of the light emitting unit 13, and a wireless reception unit that receives radio waves may be provided instead of the light receiving unit 21. With such a configuration, even if the terminal cannot receive light due to the influence of sunlight, such as outdoors, the terminal can reliably transmit sound waves to the imaging position specifying device when receiving radio waves. Can do.

In the first and second embodiments described above, the terminal is identified by changing the frequency of the sound wave transmitted from the terminal for each terminal. However, the identification information of the terminal is put on the sound wave transmitted from the terminal. Each terminal may be identified by transmission. Further, the frequency of sound waves transmitted from each terminal may be circulated and changed.
In the first and second embodiments described above, the case where the shooting position specifying device takes an image has been described. However, even when a moving image is shot, the above-described shooting position specifying system can be applied. it can.
Further, in the first and second embodiments described above, the terminal that has received light from the light emitting unit 13 of the imaging position specifying device immediately transmits a sound wave. The sound wave is received, and the sound wave may cause interference. In order to prevent this, a different delay may be provided for each terminal, and this may be taken into account when calculating the distance.
In the first and second embodiments described above, the case where an image is captured by the image capturing unit 12 and the position where the image is captured is calculated. However, the present invention is not limited to this. For example, when the input unit 11 receives a predetermined instruction (for example, when the shutter is half-pressed), the position of the shooting position specifying device 10a is calculated and displayed without shooting by the shooting unit 12. It may be.

  In the embodiment described above, the input unit 11, the imaging unit 12, the light emitting unit 13, the sound wave receiving unit 14, the time acquisition unit 15, the control unit 16, the storage unit 17, and the azimuth measurement in FIGS. 2, 4, and 8. Unit 18, elevation angle measuring unit 19, light receiving unit 21, control unit 22, sound wave transmitting unit 23, light receiving unit 50, or a program for realizing a part of these functions is recorded on a computer-readable recording medium. The photographing position specifying system may be controlled by causing the computer system to read and execute the program recorded on the recording medium. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

It is the schematic which shows an example of a structure of the imaging | photography position specific system by the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the imaging | photography position specific device 10a (FIG. 1) by the 1st Embodiment of this invention. It is a figure which shows an example of the information previously recorded on the memory | storage part 17 of the imaging position specific device 10a (FIG. 1) by the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the terminal 20a (FIG. 1) by the 1st Embodiment of this invention. It is a flowchart which shows an example of a process of the imaging position specific | specification apparatus 10a by the 1st Embodiment of this invention. It is a figure which shows an example of the information recorded on the memory | storage part 17 of the imaging position specification apparatus 10a (FIG. 1) by the 1st Embodiment of this invention. It is the schematic which shows an example of a structure of the imaging | photography position specific system by the modification of the 1st Embodiment of this invention. It is a block diagram which shows an example of a structure of the imaging position specific | specification apparatus 10b by the modification of the 1st Embodiment of this invention. It is a flowchart which shows an example of a process of the imaging position specific | specification apparatus 10b by the modification of the 1st Embodiment of this invention. It is the schematic which shows an example of a structure of the imaging | photography position specific system by the 2nd Embodiment of this invention. It is a flowchart which shows an example of a process of the imaging position specific | specification apparatus 10c by the 2nd Embodiment of this invention.

Explanation of symbols

10a to 10c ... imaging position specifying device, 11 ... input unit (instruction acquisition unit), 12 ... imaging unit (imaging unit), 13 ... light emitting unit (electromagnetic radiation unit), 14 ... Sound wave receiving unit (sound wave receiving unit), 15 ... Time acquisition unit (time acquisition unit), 16 ... Control unit (distance calculation unit, position calculation unit), 17 ... Storage unit (first storage unit) , Second storage means), 18... Azimuth measuring section (azimuth measuring means), 19... Elevation angle measuring section (elevation angle measuring means), 20 a to 20 c... Terminal, 21. Receiving means), 22 ... control unit, 23 ... sound wave sending part (sound wave sending means), 30a-30c ... tripod, 40 ... floor, 41 ... ceiling, 60 ... subject, 50... Light receiving unit (electromagnetic wave receiving means), 70... Photographing device, 201 to 224.

Claims (8)

A shooting position specifying system comprising a shooting position specifying device and at least three terminals,
The photographing position specifying device includes:
Instruction acquisition means for acquiring a shooting instruction;
Photographing means for photographing a subject when the photographing instruction is acquired;
First storage means for previously storing the positions of the at least three terminals;
An electromagnetic wave radiation means for radiating an electromagnetic wave when the photographing instruction is acquired;
A sound wave receiving means for receiving sound waves transmitted from the at least three terminals;
Time acquisition means for acquiring the time of receiving the sound wave and the time of emitting the electromagnetic wave;
Distance calculating means for calculating the distance to each terminal based on the difference between the time when the sound wave is received and the time when the electromagnetic wave is radiated and the sound speed;
Position calculating means for calculating the position of the self-capturing position specifying device based on the distance to each terminal;
Second storage means for storing the image capturing result by the image capturing means and the position of the self-capturing position specifying device calculated by the position calculating means in association with each other;
The terminal
An electromagnetic wave receiving means for receiving an electromagnetic wave emitted by the electromagnetic wave emitting means;
A sound wave transmitting means for transmitting a sound wave when receiving the electromagnetic wave;
A photographing position specifying system characterized by comprising: The first storage means stores in advance the positions of the at least three terminals and identification information of the terminals in association with each other,
The sound wave receiving means receives sound waves transmitted from the at least three terminals and specifies from which terminal the sound waves are transmitted based on the identification information,
The imaging position specifying system according to claim 1, wherein the sound wave transmitting unit transmits a sound wave including identification information of the terminal itself when the electromagnetic wave is received. The electromagnetic wave radiating means radiates an electromagnetic wave a plurality of times when the photographing instruction is acquired,
3. The photographing according to claim 1, wherein the position calculating unit calculates the position of the self-capturing position specifying device based on a distance to each terminal and the number of sound waves received from each terminal. Location system. The photographing position specifying device further includes an azimuth measuring unit that measures an azimuth for photographing the subject,
The said 2nd memory | storage means matches with the information image | photographed by the said imaging | photography means, and further memorize | stores the azimuth | direction measured by the said azimuth | direction measuring means, The said any one of Claim 1 to 3 characterized by the above-mentioned. Shooting position identification system. Further comprising an elevation angle measuring means for calculating the elevation angle of the self-portrait position specifying device at the time of shooting based on the acceleration of gravity,
The second storage unit further stores the elevation angle calculated by the elevation angle calculation unit in association with information captured by the imaging unit. Shooting position identification system. Instruction acquisition means for acquiring a shooting instruction;
Photographing means for photographing a subject when the photographing instruction is acquired;
First storage means for storing in advance the positions of at least three terminals;
An electromagnetic wave radiation means for radiating an electromagnetic wave when the photographing instruction is acquired;
A sound wave receiving means for receiving sound waves transmitted from the at least three terminals;
Time acquisition means for acquiring the time when the sound wave is received and the time when the electromagnetic wave is emitted;
Distance calculating means for calculating the distance to each terminal based on the difference between the time when the sound wave is received and the time when the electromagnetic wave is radiated and the sound speed;
Position calculating means for calculating the position of the self-capturing position specifying device based on the distance to each terminal;
A second storage means for storing the photographing result by the photographing means and the position of the self-photographing position specifying device calculated by the position calculating means in association with each other;
A photographing position specifying device characterized by comprising: An imaging position specifying device attached to an imaging device,
First storage means for storing in advance the positions of at least three terminals;
Electromagnetic wave receiving means for receiving electromagnetic waves radiated from the imaging device;
A sound wave receiving means for receiving sound waves transmitted from the at least three terminals;
Time acquisition means for acquiring the time of receiving the sound wave and the time of receiving the electromagnetic wave;
Distance calculating means for calculating the distance to each terminal based on the difference between the time when the sound wave is received and the time when the electromagnetic wave is radiated and the sound speed;
Position calculating means for calculating the position of the self-capturing position specifying device based on the distance to each terminal;
Second storage means for storing the position of the self-photographing position specifying device calculated by the position calculating means;
A photographing position specifying device characterized by comprising: A shooting position specifying method using a shooting position specifying device and at least three terminals,
An instruction obtaining process for obtaining a photographing instruction by the photographing position specifying device;
A shooting process of shooting the subject by the shooting position specifying device when the shooting instruction is acquired;
A first storing step of storing the positions of the at least three terminals in advance by the photographing position specifying device;
An electromagnetic wave emission process in which an electromagnetic wave is radiated by the photographing position specifying device when the photographing instruction is acquired;
An electromagnetic wave receiving process in which the electromagnetic waves radiated in the electromagnetic wave emitting process are received by the at least three terminals;
A sound wave transmitting process for transmitting sound waves by the at least three terminals when receiving the electromagnetic waves;
A sound wave receiving process of receiving sound waves transmitted from the at least three terminals by the imaging position specifying device;
A time acquisition process of acquiring the time when the sound wave is received and the time when the electromagnetic wave is radiated by the imaging position specifying device;
A distance calculation process for calculating the distance to each terminal based on the difference between the time when the sound wave is received and the time when the electromagnetic wave is radiated and the sound speed;
A position calculation process in which the position of the self-capturing position specifying device is calculated by the shooting position specifying device based on the distance to each terminal;
A second storage process in which the shooting position specifying device stores the shooting result in the shooting process and the position of the shooting position specifying device calculated in the position calculating process in association with each other;
An imaging position specifying method characterized by comprising:

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