JP2019041151A - Imaging device, control method and program - Google Patents

Abstract

To increase probability in which position information can be imparted to a captured image in an imaging device having a radio communication function without complicating the structure of the device.SOLUTION: An imaging device having a radio communication function comprises: setting means for switching role of the imaging device to a role of receiving a beacon when radio connection with an external device is not established; receiving means for receiving the position information of the external device when set to the role of transmitting the beacon and receiving the beacon including the position information of a transmission source when set to the role of receiving the beacon; and imparting means for imparting the position information of the imaging device which is specified based on the received position information to the image obtained by the imaging means when the receiving means receives the position information and for imparting the position information of the imaging device which is specified based on the position information included in the received beacon to the image when the receiving means receives the beacon.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a photographing apparatus having a wireless communication function, a control method, and a program.

  Conventionally, a standard called Bluetooth (registered trademark) that can operate with low power consumption but low communication speed is known. In particular, since version 4.0, it has been adopted in a wide range of devices by focusing on low power consumption. Generally, Bluetooth after Version 4.0 is called Bluetooth Low Energy (hereinafter referred to as BLE). BLE is also installed in digital cameras, and realizes various functions and services by always connecting with a BLE-compatible smartphone. For example, there is a function of transmitting position information held by a smartphone to a digital camera by BLE communication. Thereby, even a digital camera having no positioning function can provide position information to image data.

  Patent Document 1 discloses a technology that has GPS (Global Positioning Service) and short-range radio, and can acquire position information from nearby devices using short-range radio when GPS positioning signals cannot be received. ing. Providing a plurality of routes for acquiring position information can increase the probability of acquiring position information.

JP 2004-125490 A

  In the case of a camera that acquires position information from a smartphone connected by BLE, the position information cannot be acquired from the smartphone unless the smartphone is within the BLE communication range, and the position information cannot be given to the captured image. In this case, as described in Patent Document 1, it is possible to acquire position information by a mechanism different from BLE. However, a mechanism other than BLE is required, which complicates the structure of the camera. There is.

  The present invention has been made in view of such problems, and in a photographing apparatus having a wireless communication function, the probability that position information can be given to a photographed image obtained by the photographing apparatus without complicating the structure of the apparatus. The purpose is to increase.

  Therefore, the present invention is an imaging device having a wireless communication function, and is an imaging unit for imaging a subject, and a role of transmitting a beacon indicating the presence of the imaging device as a role in wireless communication of the imaging device, and an external When one of the roles of receiving a beacon from a device is set and the wireless connection with an external device is not established in the state where the role of transmitting the beacon is set, the role of the photographing device is changed to the beacon. Setting means for switching to the role of receiving the beacon, and if the role of transmitting the beacon is set, the role of receiving the beacon is received from the external device that has received the beacon If it is set, the receiving means for receiving the beacon including the location information of the transmission source and the reception means when the receiving means receives the location information. Position information included in the received beacon when the receiving unit receives the beacon when the receiving unit receives the beacon from the position information of the image capturing device specified based on the position information And adding means for giving the position information of the photographing apparatus specified based on the photographed image to the photographed image.

  According to the present invention, in a photographing apparatus having a wireless communication function, it is possible to increase the probability that position information can be given to a photographed image obtained by the photographing apparatus without complicating the structure of the apparatus.

It is a figure which shows a digital camera. It is a figure which shows a terminal device. It is a figure which shows a wireless access point. 1 is an overall view of a system. It is a sequence diagram which shows a positional information reception process. It is a figure which shows a GATT server. It is a flowchart which shows the process in which a terminal device acquires position information. It is a figure which shows an example of a data structure of Advertise. It is a flowchart which shows a positional information acquisition process. It is a flowchart which shows the positional infomation acquisition process which concerns on 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a diagram illustrating a digital camera 100 as a photographing apparatus. Reference numeral 101 denotes a lens that captures a subject image into the digital camera 100. The imaging unit 102 includes an imaging device such as a CCD and a CMOS and various electronic devices, and converts a subject image optically captured by the lens 101 into digital data. The control unit 103 controls the entire digital camera 100. The control unit 103 is, for example, a central processing unit (CPU). The image processing unit 104 performs image processing on the still image captured by the imaging unit 102. The encoding unit 105 performs encoding processing on the image data processed by the image processing unit 104 according to a desired encoding method.

  A Read Only Memory (ROM) 106 is a rewritable nonvolatile memory, and holds programs such as an operating system (OS) and programs supplied from an external device. A Random Access Memory (RAM) 107 is a volatile memory that temporarily stores programs, captured image data, communication data, and the like. The storage unit 108 is a memory card that can be attached to and detached from the digital camera 100. The storage unit 108 can store image data / moving image data captured by the digital camera 100. Note that the functions and processing of the digital camera 100 to be described later are realized by the control unit 103 reading a program stored in the ROM 106 and executing the program.

  The Bit Move Unit (BMU) 109 is performed, for example, between memories (for example, between the RAM 107 and another memory) or between the memory and each I / O device (for example, the wireless unit 110) via the system bus 111. Control data transfer. The wireless unit 110 communicates with the terminal device 200 through device-to-device communication at a short distance.

  The wireless unit 110 performs short-range wireless communication using Bluetooth (registered trademark). Bluetooth, for example, is a wireless interface having a feature that the communication speed is slower than that of a wireless LAN but the power consumption is low. In the present embodiment, the wireless unit 110 is assumed to be compliant with the Bluetooth Low Energy standard (BLE) defined in Bluetooth standard version 4.0 or later. Furthermore, it is assumed that the wireless unit 110 can function as either an advertiser or a scanner as a role in BLE. That is, the wireless unit 110 can transmit the advertisement as an advertiser to notify the other device (external device) of the presence of the own device, and can also receive the advertisement generated by the other device as a scanner. The Advertise transmitted by the advertiser is an example of a beacon that notifies the existence of the own device, and the advertiser is an example of a role of transmitting the beacon. A scanner is an example of a role of receiving a beacon from an external device. The system bus 111 connects the blocks 102 to 110 so that they can communicate with each other.

  FIG. 2 is a diagram illustrating the terminal device 200. The terminal device 200 is connected to the digital camera 100 by BLE. The terminal device 200 may be realized by a single computer device, or may be realized by distributing functions to a plurality of computer devices as necessary. The control unit 201 controls the entire terminal device 200. The control unit 201 is, for example, a CPU. The ROM 202 is a rewritable nonvolatile memory and holds programs such as an OS and programs supplied from an external device. The RAM 203 is a volatile memory and temporarily stores programs and data. The storage unit 204 stores image data and the like. The storage unit 204 is, for example, a hard disk drive (HDD) that is fixedly installed in the terminal device 200 or a solid state drive (SSD) that includes a flash memory. The storage unit 204 may also be a hybrid drive or a memory card using both a hard disk and a flash memory. Note that the functions and processes of the terminal device 200 described later are realized by the control unit 201 reading a program stored in the ROM 202 or the like and executing the program.

  The BMU 205 controls, for example, data transfer between memories (for example, between the VRAM 206 and another memory) and between the memory and each I / O device (for example, the wireless unit 209 and the wireless LAN unit 210). A video RAM (VRAM) 206 draws an image to be displayed on the liquid crystal monitor 208. The image generated in the VRAM 206 is transmitted to the liquid crystal monitor 208 according to a predetermined rule. Thereby, the liquid crystal monitor 208 displays an image. The liquid crystal monitor 208 is a touch panel having a touch sensor 207. The touch panel is an input device that is configured to be planar and overlapped with the liquid crystal monitor 208 so that coordinate information corresponding to the touched position is output. The control unit 201 receives an instruction corresponding to a user operation on the touch panel.

  The wireless unit 209 performs wireless communication with other devices such as the digital camera 100 by short-range wireless communication. For example, the wireless unit 209 receives position information transmitted by a wireless access point described later via wireless communication. The wireless unit 209 is assumed to be compliant with the BLE similarly to the wireless unit 110 of the digital camera 100. However, the wireless unit 209 only needs to be able to operate in the role of a scanner as a role in BLE. The wireless unit 209 receives Advertise transmitted by another device, and establishes a BLE connection as necessary. The wireless LAN unit 210 connects to the Internet by communicating with a wireless access point.

  The GPS unit 211 performs positioning based on the Global Positioning Service. The GPS unit 211 receives the electric field from the satellite and calculates the accurate position information of the terminal device 200 by performing arithmetic processing. Calculation of position information by GPS is effective for position measurement outdoors. The system bus 212 connects the blocks 201 to 211 in a communicable manner.

  FIG. 3 is a diagram illustrating a wireless access point (AP) 300 in the present embodiment. The wireless AP 300 may be realized by a single computer device, or may be realized by distributing functions to a plurality of computer devices as necessary. The control unit 301 controls the entire wireless AP 300. The control unit 301 is a CPU, for example. A ROM 302 is a rewritable nonvolatile memory, and holds programs such as an OS and programs supplied from an external device. The RAM 303 is a volatile memory and temporarily stores programs and data. The storage unit 304 stores settings of the wireless AP 300 and programs to be executed. The storage unit 304 is, for example, an HDD, an SSD, a hybrid drive using a combination of a hard disk and flash memory, a memory card, or the like fixedly installed on the wireless AP 300. The BMU 305 controls data transfer between memories (for example, between the RAM 303 and another memory) or between the memory and each I / O device (for example, the wireless unit 306 and the wireless LAN unit 307).

  The wireless unit 306 performs wireless communication with other devices by short-range wireless communication. The wireless unit 209 is assumed to be compliant with BLE similarly to the wireless unit 110 and the like. However, the wireless unit 306 only needs to be able to operate in the role of an advertiser as a role in BLE. The wireless unit 306 has a function capable of performing Advertise conforming to BLE's Interior Positioning Service (IPS), and can transmit location information conforming to IPS. It is assumed that the transmitted position information is set when the wireless AP 300 is installed. The wireless LAN unit 307 connects to the terminal device 200 to perform wireless communication, and provides the terminal device 200 with access to the Internet. The system bus 308 connects the blocks 301 to 307 so that they can communicate with each other.

  Note that the short-range wireless communication used by the digital camera 100, the terminal device 200, and the wireless AP 300 is not limited to Bluetooth, and other short-range wireless communication schemes may be used.

  FIG. 4 is an overall view of a system that realizes a process in which the digital camera 100 assigns position information to a captured image obtained by imaging. The digital camera 100 is connected to the terminal device 200 by BLE. The digital camera 100 can always be connected by using BLE with low power consumption, and can acquire not only the position information from the terminal device 200 regularly but also the latest position information at the timing of shooting. it can. The digital camera 100 can also acquire the position information included in the Advertise by acquiring the Advertise including the position information transmitted by the wireless AP 300.

  The terminal device 200 acquires position information provided to the digital camera 100 by a plurality of methods. The first is a method in which the GPS unit 211 receives GPS radio waves emitted from the GPS satellite 400 and calculates position information. This is effective for positioning outdoors. The second method is a method for receiving Advertise including position information transmitted by the wireless AP 300. This is effective indoors where GPS radio waves do not reach. The third method is a method in which the terminal device 200 connects to the Internet 401 through a wireless LAN connection with the wireless AP 300 and acquires location information of the wireless AP 300 from the location information management server 402. The position information management server 402 manages the SSID information and the position information in association with each other. The terminal device 200 acquires location information by making an inquiry to the location information management server 402 via the Internet 401 using SSID (Service Set IDentifier) information indicating the wireless AP 300. This is also effective when GPS radio waves do not reach. The digital camera 100 receives the position information acquired by the terminal device 200. For this reason, the digital camera 100 can add position information to a captured image without having a positioning function such as GPS.

  FIG. 5 is a sequence diagram illustrating processing in which the digital camera 100 receives position information from the terminal device 200. This process is started when the digital camera 100 and the terminal device 200 are not connected to BLE. In S501, the digital camera 100 is activated. The digital camera 100 is activated in response to, for example, an operation in which a user presses a power button to take a picture. In step S <b> 502, the control unit 103 of the digital camera 100 performs control so as to start advertisement in accordance with the BLE standard. Specifically, the control unit 103 sets a setting value such as an Advertise interval and Advertise data for the wireless unit 110. In response to this, the wireless unit 110 starts transmitting an Advertise packet. Through the process of S502, the digital camera 100 can notify the peripheral devices of the presence of the own device. Advertise takes the form of a broadcast that is periodically distributed according to the Advertise interval. If the distribution interval becomes longer, Advertise can continue to be distributed for a long time. The digital camera 100 basically behaves as an advertiser device during BLE connection.

  When receiving the Advertise, the control unit 201 of the terminal device 200 controls to transmit a connection request to the digital camera 100 as a response to the Advertise in S503. Specifically, the control unit 201 sets a connection request for the wireless unit 209. In response to this, the wireless unit 209 transmits a connection request. As another example, the control unit 201 may transmit a connection request when receiving the Advertise and receiving a connection instruction from the user. For example, when receiving the advertisement, the terminal device 200 may display information indicating the presence of the digital camera 100 on the liquid crystal monitor 208 and then receive a connection instruction from the user.

  In step S <b> 504, the control unit 103 of the digital camera 100 and the control unit 201 of the terminal device 200 perform control so as to establish a BLE connection. This is a link layer connection. In S504, under the control of the control unit 103 and the control unit 201, the wireless unit 110 and the wireless unit 209 exchange information related to the support function as BLE, and the wireless radio waves can be exchanged. Basically, the wireless unit 110 and the wireless unit 209 automatically establish a link layer connection in accordance with the BLE standard, triggered by the transmission of the connection request in S503. The control unit 103 and the control unit 201 can grasp the completion of the BLE connection by monitoring the states of the wireless unit 110 and the wireless unit 209, respectively.

  Next, in step S505, the control unit 103 and the control unit 201 establish a connection with the ATT service. This is an application layer connection. The control unit 103 and the control unit 201 establish an ATT connection that can provide various functions based on the BLE connection established in S504. The communication follows the protocol specified by ATT. This processing can be realized when the control unit 103 of the digital camera 100 uses the wireless unit 110 and the control unit 201 of the terminal apparatus 200 exchanges requests and responses using the wireless unit 209.

  In the present embodiment, it is assumed that the digital camera 100 is compatible with a service related to position information as shown in FIG. A location information reception service 602 is prepared in a GATT server 601 that is a server function compliant with GATT (General ATTribular Profile). The GATT server 601 exists on the RAM 107 as a program executed by the control unit 103. The location information reception service 602 exists on the RAM 107 as data managed by the program of the GATT server 601. Further, the location information reception service 602 has a UUID (Universally Unique IDentifier) 603 for uniquely identifying itself. Further, the position information reception service 602 has a latitude value 606 that can be identified by the handle 604 and a longitude value 607 that can be identified by the handle 605 as actual values. The digital camera 100 can utilize the position information by referring to the latitude value 606 and the longitude value 607.

  Returning to FIG. 5, after the processing of S505, in S506, the control unit 201 of the terminal device 200 controls the digital camera 100 to transmit a position information write request according to the ATT protocol. The write request is a request for the terminal device 200 to request an update of the position information managed by the position information reception service 602 of the digital camera 100. The control unit 201 sets a write request for the wireless unit 209. In response to this, the wireless unit 209 transmits a write request. As a write request, UUID 603 and handles 604 and 605 are combined as arguments. Thereby, the latitude value 606 and the longitude value 607 in the position information reception service 602 managed by the GATT server 601 can be uniquely specified. The control unit 201 stores the latest position information in the RAM 203. Accordingly, the control unit 201 can transmit the latest position information. Note that a process in which the terminal device 200 acquires position information will be described later with reference to FIG.

  When the digital camera 100 receives the write request, the control unit 103 updates the position information in S507. Specifically, the GATT server 601 operating in the control unit 103 extracts latitude and longitude information from the request received by the wireless unit 110. Then, the GATT server 601 identifies the service to be written with the UUID 603 and copies the data to the latitude value 606 and longitude value 607 areas in the RAM 107 according to the handles 604 and 605. Thereby, the position information that can be handled by the digital camera 100 is updated.

  In step S <b> 508, the control unit 103 performs control so that a write response is transmitted to the terminal device 200 as a response corresponding to the write request. Specifically, the control unit 103 sets a write response in the wireless unit 110. In response to this, the wireless unit 110 transmits a write response to the terminal device 200. Through the processing so far, the terminal device 200 can provide position information to the digital camera 100 using BLE. Basically, the BLE is always connected, and the connection of the BLE between the digital camera 100 and the terminal device 200 is maintained while communication is not performed. Specifically, the control unit 103 of the digital camera 100 and the control unit 201 of the terminal device 200 continue to confirm each other's existence by exchanging empty packets.

  Next, in step S509, the control unit 103 of the digital camera 100 performs control so that shooting is performed according to a user operation. When the shooting button is pressed, the imaging unit 102 performs shooting under the control of the control unit 103. The control unit 103 performs processing of the image processing unit 104 and the encoding unit 105 on the photographed image obtained by photographing using the BMU 109 to obtain a photographed image according to a desired format. The obtained captured image is temporarily stored in the RAM 107. Next, in S510, the control unit 103 provides position information to the captured image. Specifically, the control unit 103 copies the latitude value 606 and the longitude value 607 acquired in S507 and stored in the RAM 107 to a predetermined area of the captured image. An example of the predetermined area of the image data is an area of position information in Exif (Exchangeable image file format). In step S <b> 511, the control unit 103 stores the captured image to which the position information is added in the storage unit 108. Specifically, the control unit 103 uses the BMU 109 to move the captured image from the RAM 107 to the storage unit 108. Through the above processing, the digital camera 100 can receive the position information via the BLE connection with the terminal device 200, and can add the received position information to the captured image.

  Next, a process in which the terminal device 200 acquires position information will be described with reference to FIG. The terminal device 200 acquires position information by three methods. The position information acquired by the terminal device 200 is transmitted to the digital camera 100. The first process for acquiring position information is a process using GPS. In step S <b> 701, the control unit 201 of the terminal device 200 can acquire position information by acquiring GPS information. Specifically, the GPS unit 211 calculates position information under conditions where radio waves from the GPS satellite 400 can be received. The control unit 201 acquires the position information by reading the position information calculated by the GPS unit 211 from the GPS unit 211. By executing this process periodically, the control unit 201 can continue to acquire the latest position information under conditions that allow GPS radio waves to be received, such as outdoors.

  The second is processing using BLE. In step S <b> 711, the wireless unit 306 of the wireless AP 300 performs advertisement based on BLE IPS. The control unit 301 sets a setting value such as an Advertise interval in the wireless unit 306 and position information of the wireless AP 300 as Advertise data. In response to this, the wireless unit 306 transmits an Advertise packet including position information.

  FIG. 8 is a diagram illustrating an example of an Advertise data structure compliant with IPS. Advertise 800 is information defined by the IPS standard. The data length 801 is an Advertise data length. The advertisement type 802 is an identifier indicating the type of Advertise. In the case of IPS Advertise, the advertisement type 802 has a value of “0x25”. A flag 803 indicates the type of information included in the Advertise. In the example of FIG. 8, “0x05” is set in the flag 803. This means that it includes position information composed of latitude and longitude according to a geodetic system conforming to WGS84 (World Geometric System 1984) and radio wave intensity information of Advertise. Reference numeral 804 denotes latitude information. Reference numeral 805 denotes latitude information. Reference numeral 806 denotes Advertise radio field intensity. This position information is information set in advance when the wireless AP 300 is installed.

  Returning to FIG. 7, the control unit 201 of the terminal device 200 confirms whether or not the advertise including the position information transmitted in S <b> 711 has been received. Specifically, when receiving the Advertise, the control unit 201 confirms whether “0x25” is set in the advertisement type 802 of the received Advertise. When “0x25” is set in the advertisement type 802, the control unit 201 determines that an advertise including position information has been received. In this case, the control unit 201 extracts latitude 804 and longitude 805 from the Advertise and stores them in the RAM 203. The control unit 201 can continuously acquire the latest position information even when the GPS radio wave cannot be received, such as indoors, by periodically executing this process.

  The third is processing using a wireless LAN. In S721, the control unit 301 of the wireless AP 300 periodically transmits a beacon in the access point mode of the wireless LAN function. Specifically, the control unit 301 writes a setting value such as an SSID in the wireless LAN unit 307. In response to this, the wireless LAN unit 307 transmits a beacon. On the other hand, in S722, the control unit 201 of the terminal device 200 performs a beacon scan. Specifically, the control unit 201 makes an inquiry to the wireless LAN unit 210. When the control unit 201 detects the beacon, next, in step S723, the control unit 201 of the terminal device 200 and the control unit 301 of the wireless AP 300 perform connection via a wireless LAN. The process of S723 is a process of establishing a link layer connection, and the control unit 201 and the control unit 301 perform an authentication process and establish a protected communication path. As another example, when a list of available access points is displayed on the liquid crystal monitor 208 on the terminal device 200 and selection of a desired wireless AP 300 is received from the user, the process of S723 is executed. It may be a thing.

  After establishing the connection in the wireless LAN, in step S724, the control unit 201 of the terminal device 200 transmits a position information inquiry request. The inquiry request is transmitted to the location information management server 402 via the wireless AP 300. The inquiry request is information in which an SSID is used as an argument and an inquiry is made for position information that matches the SSID. The transmission of the inquiry request can be realized by a POST process of HTTP (Hyper Text Transport Protocol). The control unit 201 can transmit an inquiry request by creating a request message in the RAM 203 and sending data from the RAM 203 to the wireless LAN unit 210 using the BMU 205. The control unit 301 of the wireless AP 300 transmits the received inquiry request to the Internet 401.

  Next, in S725, the location information management server 402 transmits a location information notification indicating the location information as a response to the received inquiry request. Specifically, the location information management server 402 acquires location information that matches the requested SSID from the database, assigns the acquired location information to an HTTP response message, and transmits this to the terminal device 200. The response message is sent to the terminal device 200 via the wireless AP 300. The control unit 201 of the terminal device 200 can acquire the position information notification via the wireless LAN unit 210.

  In this way, the terminal device 200 holds the position information of the device as accurate as possible by trying to acquire the position information by the three methods described above. The terminal device 200 provides position information to the digital camera 100 that is always connected by BLE. As long as the digital camera 100 maintains the BLE connection with the terminal device 200, the digital camera 100 can give the latest position information to the captured image.

  FIG. 9 is a flowchart showing position information acquisition processing by the digital camera 100. In the process described with reference to FIG. 5, the digital camera 100 cannot acquire the latest position information in a situation where BLE connection with the terminal device 200 is not possible. For this reason, for example, when one user carries the digital camera 100 and the terminal device 200 and the battery of the terminal device 200 runs out on the go, position information is given to the captured image obtained by the digital camera 100. You will not be able to. Therefore, the digital camera 100 attempts to acquire position information by the process shown in FIG. As a premise of processing, it is assumed that the digital camera 100 is set as an advertiser.

  In step S901, the control unit 103 of the digital camera 100 sets the operation mode of the digital camera 100 to the shooting mode. Here, the shooting mode is an operation mode for enabling the shooting function of the imaging unit 102. In the shooting mode, the imaging unit 102 can perform shooting in response to the user pressing the shooting button. That is, the process of S902 is an example of a process for effectively setting a shooting function by the shooting unit.

  In step S <b> 902, the control unit 103 confirms whether a BLE connection (wireless connection) between the digital camera 100 and the terminal device 200 is being established. Specifically, the control unit 103 determines that the BLE connection is being established when the wireless unit 110 is executing the exchange of empty packets described in S508 (FIG. 5). As another example, the control unit 103 may determine that a BLE connection is established when the wireless unit 110 is executing Advertise as an advertiser. If the control unit 103 determines that the BLE connection is being confirmed (Yes in S902), the control unit 103 advances the process to S903. If the control unit 103 determines that the BLE connection is not established (No in S902), the control unit 103 advances the process to S911.

  In step S <b> 903, the control unit 103 receives position information from the terminal device 200. In step S904, the control unit 103 updates the position information stored in the RAM 107 to the position information received in step S903. The processes of S903 and S904 correspond to the processes of S506 to S508 in FIG. Next, in step S905, the control unit 103 confirms whether shooting has been performed. The shooting process corresponds to the process of S509 in FIG. For example, the control unit 103 checks whether or not shooting has been performed depending on whether or not the shutter button has been pressed by the user. If the control unit 103 determines that shooting has been performed (YES in step S905), the control unit 103 advances the process to step S906. If the control unit 103 determines that no shooting has been performed (No in S905), the control unit 103 advances the process to S908. In step S906, the control unit 103 adds the position information updated in step S904 to the captured image as the position of the digital camera 100. In step S907, the control unit 103 stores the captured image to which the position information is added in the storage unit 108, and then advances the processing to step S902. Here, the processing of S906 and S907 corresponds to the processing of S510 and S511 of FIG.

  In step S908, the control unit 103 confirms whether the shooting mode has ended. Note that the control unit 103 ends the shooting mode when receiving an instruction to end the shooting mode in response to a user operation. When the control unit 103 determines that the shooting mode has ended (Yes in S908), the control unit 103 ends the process. If the control unit 103 determines that the shooting mode has not ended (No in S908), the control unit 103 advances the process to S902.

  On the other hand, in S911, the control unit 103 switches the role in BLE wireless communication from the advertiser to the scanner. This process is an example of a setting process for setting a role in wireless communication. Next, in S912, the control unit 103 confirms whether or not Advertise compliant with BLE IPS has been received. The control unit 103 determines that the Advertise conforming to the ISP has been received when the Advertise with the advertisement type “0x25” is received. If the control unit 103 determines that an Advertise compliant with ISP has been received (Yes in S912), the control unit 103 advances the process to S913. If the control unit 103 determines that the Advertise conforming to the ISP has not been received (No in S912), the control unit 103 advances the process to S915.

  In step S <b> 913, the control unit 103 acquires position information included in the received Advertise. Next, in S914, the control unit 103 updates the position information stored in the RAM 107 with the position information acquired from Advertise. Specifically, the control unit 103 confirms that the latitude 804 and longitude 805 exist based on the Advertise flag 803, and overwrites the latitude value 606 and longitude value 607 of the RAM 107 with these data. Note that since the BLE connection between the digital camera 100 and the terminal device 200 has not been established at the time of the processing in S913, the GATT server 601 and the location information reception service 602 are invalid. For this reason, in the process described with reference to FIG. 5, the terminal device 200 does not transmit a write request to the latitude value 606 and the longitude value 607 according to the ATT protocol. On the other hand, when the BLE connection between the digital camera 100 and the terminal device 200 is being established, the processes of S911 to S914 are not executed. That is, the latitude value 606 and the longitude value 607 of the RAM 107 are exclusively used when the BLE connection is being established and when it is not.

  In step S <b> 915, the control unit 103 confirms whether shooting has been performed. This process is the same as the process of S905. If the control unit 103 determines that shooting has been performed (Yes in S915), the control unit 103 advances the process to S916. If the control unit 103 determines that no shooting has been performed (No in S915), the control unit 103 advances the process to S919.

  In step S <b> 916, the control unit 103 confirms whether the updated position information is stored in the RAM 107. As will be described later, the processing of S912 to S919 is a loop processing, and S912 to S914 are executed a plurality of times. In this loop process, the control unit 103 determines that the updated position information is stored in the RAM 107 when Yes is determined in S912 executed immediately before the process of S916 and S914 is executed. . As another example, the control unit 103 may determine whether there is updated position information according to the update timing of the position information stored in the RAM 107. That is, the control unit 103 determines that the updated position information is stored when the period from the update timing to the time when the process of S916 is executed is less than the threshold.

  If the control unit 103 determines that the updated position information is stored (Yes in S916), the control unit 103 advances the process to S917. If the control unit 103 determines that the updated position information is not stored (No in S916), the process proceeds to S918. In step S917, the control unit 103 gives the position information updated in step S906 as the position of the digital camera to the captured image obtained by the capturing process. Next, in S918, the control unit 103 stores the captured image to which the position information is added in the storage unit 108, and then advances the processing to S912.

  In step S919, the control unit 103 confirms whether the shooting mode has ended. When the control unit 103 determines that the shooting mode has ended (Yes in S919), the control unit 103 advances the process to S920. If the control unit 103 determines that the shooting mode has not ended (No in S919), the control unit 103 advances the process to S912. In step S920, the control unit 103 sets the role of BLE of the digital camera 100 to the advertiser, and then ends the process.

  As described above, the digital camera 100 according to the present embodiment can give appropriate position information to a captured image by performing a continuous connection with the terminal device 200 using BLE. Furthermore, when the BLE connection with the terminal device 200 cannot be established, the digital camera 100 switches its role in wireless communication from the advertiser to the scanner. And the digital camera 100 can acquire the positional information contained in Advertise by receiving Advertise based on IPS. That is, the digital camera 100 can increase the probability that position information can be added to a captured image without requiring a configuration other than one communication unit called BLE by switching roles in wireless communication. That is, the digital camera 100 increases the possibility that a photographing apparatus having a short-range wireless communication function such as BLE acquires position information from an external apparatus, so that the positional information is not included in the photographed image without complicating the structure of the apparatus. The probability that can be given can be increased.

  A first modification of the first embodiment will be described. In the embodiment, the digital camera 100 executes the process of S902 in FIG. 9 on condition that the shooting mode is set. However, the process of S902 may be executed when a predetermined condition is satisfied, and the predetermined condition is not limited to the embodiment. As another example, the digital camera 100 may execute S902 on the condition that the power of the digital camera 100 is turned on. In this case, the control unit 103 may execute S902 when the digital camera 100 is powered on and the control unit 103 is activated.

  A second modification will be described. In the embodiment, when the role of BLE is set in the scanner in S911, the digital camera 100 returns the role of BLE to the advertiser on condition that the shooting mode ends. However, the process of returning the role of BLE may be executed when a predetermined condition is satisfied, and the predetermined condition is not limited to the embodiment. As another example, when the digital camera 100 receives a power-off instruction in response to a user operation, the digital camera 100 may set the role of wireless communication to the advertiser before the power is turned off.

  As a third modification, the wireless unit 110 of the digital camera 100 may be operable while switching between the advertiser and the scanner in a time division manner. Further, in this case, the control unit 103 causes the digital camera 100 to operate in the roles of both an advertiser and a scanner in parallel. The control unit 103 determines that the BLE connection is not established, and when the digital camera 100 establishes the BLE connection as the advertiser while executing the processing after S911, the control unit 103 stops the processing after S911, and S903. The subsequent processing may be performed. As a result, when the BLE connection is restored, the processing after S903 can be resumed immediately.

  As a fourth modification, when the digital camera 100 receives a plurality of advertisements in step S912, the digital camera 100 may specify the position information of the digital camera 100 according to the radio field intensity of each advertisement. Specifically, the control unit 103 of the digital camera 100 estimates the distance between the source of the Advertise and the digital camera 100 from the difference between the Advertise radio field intensity and the radio field intensity 806 (FIG. 8) included in the Advertise. To do. The control unit 103 performs this for each of the plurality of Advertises. Then, the control unit 103 may calculate more accurate position information by performing calculations such as triangulation and weighted average using the position information of the transmission source of each Advertise and the estimated distance.

  As a fifth modification, the wireless communication between the digital camera 100 and the external device may be a relatively short-range wireless communication, and is not limited to BLE communication. The wireless communication between the digital camera 100 and the external device may be, for example, a wireless LAN. In this case, the control unit 103 of the digital camera 100 confirms whether or not a wireless LAN connection is being established in S902 of FIG. The case where the wireless LAN connection is not being established is a state where the digital camera 100 is transmitting a beacon in the AP mode. In this case, in S911, the digital camera 100 switches the role in the wireless LAN to the station mode and tries to detect a beacon issued by another wireless AP. When a beacon is detected, the position information can be acquired according to the third position information acquisition procedure of FIG.

(Second Embodiment)
Next, the difference between the digital camera 100 according to the second embodiment and the digital camera 100 according to the first embodiment will be described. FIG. 10 is a flowchart showing position information acquisition processing by the digital camera 100 according to the second embodiment. Of the processes in the position information acquisition process shown in FIG. 9, the same processes as those in the position information acquisition process according to the first embodiment described with reference to FIG. doing.

  After the process of S904, the control unit 103 advances the process to S1001. In step S1001, the control unit 103 confirms whether moving image shooting (recording) has started. For example, the control unit 103 confirms whether or not the recording is started depending on whether or not the recording button is pressed by the user. When recording starts, the control unit 103 generates a moving image file in the storage unit 108, processes the moving image acquired by the imaging unit 102 by the image processing unit 104 and the encoding unit 105, and then stores the moving image file in the storage unit 108. Record sequentially. If the control unit 103 determines that the recording has started (Yes in S1001), the control unit 103 advances the process to S1002. If the recording has not started (No in S1001), the control unit 103 advances the process to S902.

  In S1002, the control unit 103 adds position information to the moving image. Specifically, the control unit 103 writes the position information (latitude value 606 and longitude value 607) stored in the RAM 107 in the moving image management area stored in the storage unit 108. In step S <b> 1003, the control unit 103 confirms whether recording has ended. For example, the control unit 103 ends the recording when receiving an instruction to end the recording in response to a user operation. The control unit 103 waits until the recording is finished, and when it is determined that the recording is finished (Yes in S1003), the process is finished.

  On the other hand, after the process of S914, the control unit 103 advances the process to S1011. In step S1011, the control unit 103 confirms whether recording has started. This process is the same as the process of S1001. If the control unit 103 determines that the recording has started (Yes in S1011), the control unit 103 advances the process to S1012. If the recording has not started (No in S1011), the control unit 103 advances the process to S912. In step S <b> 1012, the control unit 103 confirms whether or not the updated position information is stored in the RAM 107. The process of S1012 is the same as the process of S916 of FIG. When the control unit 103 determines that the updated position information is stored (Yes in S1012), the control unit 103 advances the process to S1013. When the control unit 103 determines that the updated position information is not stored (No in S1012), the control unit 103 advances the process to S912.

  In step S1013, the control unit 103 adds position information to the moving image. The process of S1013 is the same as the process of S1002. In step S <b> 1014, the control unit 103 sets the role of BLE of the digital camera 100 to the advertiser. Next, in S1015, the control unit 103 confirms whether or not the recording is finished. The process of S1015 is the same as the process of S1003. In other words, the control unit 103 waits until the recording is finished, and when it is determined that the recording is finished (Yes in S1015), the process is finished. Other configurations and processes of the digital camera 100 according to the second embodiment are the same as those of the digital camera 100 according to the first embodiment.

  As described above, the digital camera 100 increases the possibility that a photographing apparatus having a short-range wireless communication function such as BLE acquires position information from an external apparatus, so that the structure of the apparatus is not complicated. In contrast, the probability that position information can be given can be increased.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims.・ Change is possible.

(Other examples)
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

100 Camera 200 Terminal device 300 Wireless AP

Claims (10)

An imaging device having a wireless communication function,
Photographing means for photographing the subject;
The role of the photographing device in wireless communication is set to the role of transmitting the beacon by setting either the role of transmitting a beacon indicating the presence of the photographing device or the role of receiving a beacon from an external device. In the state, when the wireless connection with the external device is not established, setting means for switching the role of the photographing device to the role of receiving the beacon;
When the role of transmitting the beacon is set, the position information of the external device is received from the external device that has received the beacon, and when the role of receiving the beacon is set, the transmission source Receiving means for receiving a beacon including the location information;
When the receiving means receives the position information, the position information of the photographing device specified based on the received position information is added to the photographed image obtained by the photographing means, and the receiving means transmits the beacon. An imaging apparatus, comprising: an attaching unit that, when received, adds position information of the imaging apparatus specified based on position information included in the received beacon to the captured image.   When the receiving unit receives the position information, the adding unit adds the position information received by the receiving unit to the image as the position information of the photographing apparatus, and the receiving unit receives the beacon. The imaging apparatus according to claim 1, wherein position information included in the beacon is added to the image as position information of the imaging apparatus. The receiving means receives a plurality of beacons transmitted from different external devices,
Further comprising specifying means for specifying the position of the imaging device based on the radio field intensity of each of the plurality of beacons received by the receiving means and the position information of each of the plurality of beacons.
The imaging apparatus according to claim 1, wherein when the beacon is received, the adding unit adds position information indicating the position specified by the specifying unit to the image.   When the role of transmitting the beacon is set as the role of the photographing device and when a predetermined condition is satisfied, the image capturing device further includes confirmation means for confirming whether a wireless connection with the external device is being established. The imaging device according to any one of claims 1 to 3.   The photographing apparatus according to claim 4, wherein the predetermined condition is that the function of the photographing unit is set to be valid.   The imaging apparatus according to claim 4, wherein the predetermined condition is that the imaging apparatus is powered on.   When the role of receiving the beacon is set as the role of the photographing device, the setting means changes the role of the photographing device to the beacon on the condition that the function of the photographing means is set to be invalid. The imaging apparatus according to claim 1, wherein the imaging apparatus is switched to a role of transmitting a message.   When the role of receiving the beacon is set as the role of the imaging device, the setting means changes the role of the imaging device to the beacon on condition that an instruction to turn off the imaging device is received. The imaging apparatus according to claim 1, wherein the imaging apparatus is switched to a role of transmitting a message. A control method executed by a photographing apparatus having a wireless communication function,
A shooting step for shooting the subject;
The role of the photographing device in wireless communication is set to the role of transmitting the beacon by setting either the role of transmitting a beacon indicating the presence of the photographing device or the role of receiving a beacon from an external device. In the state, when the wireless connection with the external device is not established, the setting step of switching the role of the photographing device to the role of receiving the beacon;
When the role of transmitting the beacon is set, the position information of the external device is received from the external device that has received the beacon, and when the role of receiving the beacon is set, the transmission source A receiving step for receiving a beacon including the location information;
When the positional information is received in the receiving step, the positional information of the imaging device specified based on the received positional information is added to the captured image obtained in the imaging step, and the beacon is transmitted in the receiving step. And a granting step of granting, to the photographed image, the position information of the photographing device specified based on the position information contained in the received beacon. A computer of a photographing apparatus having a wireless communication function,
The role of the photographing device in wireless communication is set to the role of transmitting the beacon by setting either the role of transmitting a beacon indicating the presence of the photographing device or the role of receiving a beacon from an external device. In the state, when the wireless connection with the external device is not established, setting means for switching the role of the photographing device to the role of receiving the beacon;
When the role of transmitting the beacon is set, the position information of the external device is received from the external device that has received the beacon, and when the role of receiving the beacon is set, the transmission source Receiving means for receiving a beacon including the location information;
When the receiving means receives the position information, the position information of the photographing apparatus specified based on the received position information is added to the photographed image obtained by the photographing means, and the receiving means receives the beacon. In this case, a program for causing the position information of the photographing apparatus specified based on the position information included in the received beacon to function as an attaching unit that assigns the photographed image.

Images