Patent Publication Number: US-2021180973-A1

Title: In-vehicle device, information processing device, information processing system, control method for in-vehicle device, information processing method, and recording medium

Description:
INCORPORATION BY REFERENCE 
     This is a continuation application of U.S. patent application Ser. No. 16/053,008, filed Aug. 2, 2018, which claims the disclosure of Japanese Patent Application No. 2017-182405 filed on Sep. 22, 2017. The specification, drawings and abstract are all incorporated herein by reference in their entirety. 
    
    
     BACKGROUND 
     1. Technical Field 
     The disclosure relates to an in-vehicle device, an information processing device, an information processing system, a control method for an in-vehicle device, an information processing method, and a recording medium. 
     2. Description of Related Art 
     There is an image pickup system in which pieces of location information of spots recommended for image pickup are recorded in an information center in advance, a vehicle downloads the pieces of location information via the Internet, and, when a current location of the vehicle coincides with any one of the locations of the spots recommended, captures an image (see, for example, Japanese Unexamined Patent Application Publication No. 2003-198904 (JP 2003-198904 A)). 
     SUMMARY 
     However, with the technique described in JP 2003-198904 A, the scenery of a spot that neither really interests a user of the vehicle nor suits a user&#39;s preference is also captured. 
     The disclosure provides an in-vehicle device, an information processing device, an information processing system, a control method for an in-vehicle device, an information processing method, and a recording medium that are able to acquire an image that suits a preference of a user of a vehicle. 
     An in-vehicle device according to a first aspect of the disclosure is connected to an image pickup device and is utilized by a first user. The in-vehicle device includes: a location information transmission unit configured to transmit first location information indicating a location of the in-vehicle device to an information processing device; a visit history receiving unit configured to receive visit history information of a second user, the visit history information being acquired by the information processing device based on preference information of the first user indicating a preference of the first user; and an image pickup control unit configured to cause the image pickup device to acquire an image based on a result of comparison between a first location indicated by the first location information and a second location indicated by second location information about a visited place which is visited by the second user included in the visit history information. 
     According to the above aspect, it is possible to acquire an image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the first user. 
     Therefore, it is possible to provide the in-vehicle device that is able to acquire an image that suits the preference of the user of the vehicle. 
     In the above aspect, the second user may be a user having a relationship with the first user on social media. 
     According to the above aspect, the visit history information of the second user having a relationship with the first user on social media is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the in-vehicle device that is able to acquire an image that suits the preference of the first user based on interactions between people. 
     In the above aspect, a degree of similarity between the preference indicated by the preference information of the first user and a preference of the second user may be higher than or equal to a predetermined degree. 
     According to the above aspect, the visit history information of the second user having a high degree of similarity in preference with the first user is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the in-vehicle device that is able to acquire an image that fairly suits the preference of the first user. 
     In the above aspect, the degree of similarity may increase as a degree of relationship between the first user and the second user on social media increases. 
     According to the above aspect, the visit history information of the second user having a high degree of relationship with the first user on social media is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the in-vehicle device that is able to acquire an image that probably suits the preference of the first user. 
     In the above aspect, the degree of similarity may be determined based on at least one of a birthplace of each of the first user and the second user, an age of each of the first user and the second user, a common friend of both the first user and the second user, a hobby of each of the first user and the second user, a place of work of each of the first user and the second user, an exchange of a comment between the first user and the second user on the social media, the number of times that the first user reads a post of the second user, and the number of times that the second user reads a post of the first user. 
     According to the above aspect, the visit history information of the second user determined to have a high degree of similarity in preference with the first user based on the birthplace, age, and the like, of the second user is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the second location information that is probably useful for the first user. 
     In the above aspect, the second location information may be information uploaded to social media by the second user. 
     According to the above aspect, the visit history information including the second location information uploaded to social media is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the second location information about which the first user probably empathizes. 
     In the above aspect, the second location information may be information indicating a location at which an image uploaded to social media by the second user is acquired or information indicating a location associated with post information posted to social media by the second user. 
     According to the above aspect, the visit history information including the location at which the image uploaded to social media has been acquired or the location associated with the posted information as the second location information is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the second location information about which the first user more probably empathizes. 
     In the above aspect, the visited place may be a facility, sightseeing area, or shop that the second user has ever visited. And, the second location may be a location of the facility, a location of the sightseeing area, or a location of the shop. 
     According to the above aspect, the visit history information including the location of the facility, sightseeing area or shop that the second user has ever visited as the second location information is provided to the in-vehicle device of the first user. 
     Therefore, it is possible to provide the second location information about the location of the facility, sightseeing area or shop about which the first user more probably empathizes. 
     In the above aspect, the image pickup control unit may be configured to cause the image pickup device to acquire the image from when a distance between the first location and the second location becomes shorter than or equal to a first predetermined distance to when the first location and the second location coincide with each other. 
     According to the above aspect, the image of the surrounding area within the range shorter than or equal to the first predetermined distance from the current location is acquired. 
     Therefore, it is possible to provide the in-vehicle device that is able to acquire the image that reliably includes a visited place of the second user. 
     In the above aspect, the image pickup control unit may be configured to extract, from the images acquired by the image pickup device, the image at a time when the first location and the second location coincide with each other or the image at a time when the first location is located near the second location. 
     According to the above aspect, the image at the time when the first location and the second location coincide with each other or are close to each other is extracted in the in-vehicle device. 
     Therefore, it is possible to provide the in-vehicle device that is able to reliably acquire the image of a visited place of the second user. 
     In the above aspect, the in-vehicle device may further include a visit history display unit configured to, when the distance between the first location and the second location becomes shorter than or equal to a second predetermined distance longer than the first predetermined distance, display the second location and a name of the second user on map data. 
     According to the above aspect, the visit history information of the surrounding area within the range shorter than or equal to the second predetermined distance is provided to the in-vehicle device. 
     Therefore, it is possible to provide the in-vehicle device that allows the first user to identify a visited place of the second user around the current location and easily make a stop. 
     In the above aspect, the first user may be a user of a vehicle on which the image pickup device is mounted. 
     According to the above aspect, the visit history information of the second user having a high degree of similarity in preference with the user of the vehicle is provided to the in-vehicle device. 
     Therefore, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the user of the vehicle. 
     An information processing device according to a second aspect of the disclosure includes: a receiving unit configured to receive first location information from an in-vehicle device that is utilized by a first user and that is connected to an image pickup device; a visit history acquisition unit configured to acquire visit history information of a second user based on preference information of the first user indicating a preference of the first user; a location information acquisition unit configured to acquire second location information about a visited place included in the visit history information; a transmission unit configured to transmit the second location information to the in-vehicle device. 
     According to the above aspect, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the first user. 
     Therefore, it is possible to provide the information processing device that is able to acquire the image that suits the preference of the user of the vehicle. 
     In the above aspect, the information processing device may further comprising an image recording control unit configured to store an image transmitted from the in-vehicle device in a storage unit. 
     An information processing system according to a third aspect of the disclosure includes: an in-vehicle device that is connected to an image pickup device and that is utilized by a first user; and an information processing device communicable with the in-vehicle device via a network, wherein: the in-vehicle device includes a location information transmission unit configured to transmit first location information indicating a location of the in-vehicle device to the information processing device, a visit history receiving unit configured to receive visit history information of a second user, the visit history information being acquired by the information processing device, and an image pickup control unit configured to cause the image pickup device to acquire an image based on a result of comparison between a first location indicated by the first location information and a second location indicated by second location information about a visited place included in the visit history information; and the information processing device includes a receiving unit configured to receive the first location information from the in-vehicle device, a visit history acquisition unit configured to acquire the visit history information of the second user based on preference information of the first user indicating a preference of the first user, a location information acquisition unit configured to acquire the second location information, and a transmission unit configured to transmit the second location information to the in-vehicle device. 
     In the above aspect, the information processing system may further include a social media server configured to store posts indicating spots that social media users have visited and user information of the social media users, wherein the information processing device is configured to acquire the visit history information of the second user, a degree of similarity between the preference of the first user and the a preference of the second user is equal to or larger than a predetermined value, the degree of similarity is calculated based on the user information of the first user and the user information of the second user. 
     According to the above aspect, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the first user. 
     Therefore, it is possible to provide the information processing system that is able to acquire the image that suits the preference of the user of the vehicle. 
     A control method for an in-vehicle device is connected to an image pickup device and is utilized by a first user. The control method according to a fourth aspect of the disclosure includes: transmitting, by a computer included in the in-vehicle device, first location information indicating a current location of the in-vehicle device to an information processing device; receiving, by the computer, visit history information of a second user, the visit history information being acquired by the information processing device based on preference information of the first user indicating a preference of the first user; and causing the image pickup device, by the computer, to acquire an image based on a result of comparison between a second location indicated by second location information about a visited place included in the visit history information and a first location indicated by the first location information. 
     According to the above aspect, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the first user. 
     Therefore, it is possible to provide the control method for an in-vehicle device, which is able to acquire the image that suits the preference of the user of the vehicle. 
     A non-transitory computer-readable recording medium on which a program is recorded according to a fifth aspect of the disclosure, the program being a control program for an in-vehicle device that is connected to an image pickup device and that is utilized by a first user, the program causing a computer included in the in-vehicle device to execute instructions for: transmitting first location information indicating a current location of the in-vehicle device to an information processing device; receiving visit history information of a second user, the visit history information being acquired by the information processing device based on preference information of the first user indicating a preference of the first user; and causing the image pickup device to acquire an image based on a result of comparison between a second location indicated by second location information about a visited place included in the visit history information and a first location indicated by the first location information. 
     According to the above aspect, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the first user. 
     Therefore, it is possible to provide the recording medium on which the control program for an in-vehicle device, which is able to acquire the image that suits the preference of the user of the vehicle, is recorded. 
     An information processing method according to a sixth aspect of the disclosure includes: receiving, by an information processing device, first location information from an in-vehicle device that is utilized by a first user and that is connected to an image pickup device; acquiring, by the information processing device, visit history information of a second user based on preference information of the first user indicating a preference of the first user; acquiring, by the information processing device, second location information about a visited place included in the visit history information; and transmitting, by the information processing device, the second location information to the in-vehicle device. 
     According to the above aspect, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that shows the preference of the first user. 
     Therefore, it is possible to provide the information processing method that is able to acquire the image that suits the preference of the user of the vehicle. 
     A non-transitory computer-readable recording medium on which a program is recorded according to a seventh aspect of the disclosure, the program causing an information processing device to execute instructions for: receiving first location information from an in-vehicle device that is utilized by a first user and that is connected to an image pickup device; acquiring visit history information of a second user based on preference information of the first user indicating a preference of the first user; acquiring second location information about a visited place included in the visit history information; and transmitting the second location information to the in-vehicle device. 
     According to the above aspect, it is possible to acquire the image by utilizing the visit history information of the second user. The visit history information is acquired based on the preference information that indicates the preference of the first user. 
     Therefore, it is possible to provide the recording medium on which the information processing program that is able to acquire the image that suits the preference of the user of the vehicle is recorded. 
     It is possible to provide the in-vehicle device, the information processing device, the information processing system, the control method for an in-vehicle device, the information processing method, and the recording medium that are able to acquire the image that suits the preference of the user of the vehicle. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features, advantages, and technical and industrial significance of exemplary embodiments of the disclosure will be described below with reference to the accompanying drawings, in which like numerals denote like elements, and wherein: 
         FIG. 1  is a diagram that shows an example of the configuration of an information processing system according to an embodiment of the disclosure; 
         FIG. 2  is a block diagram that shows an example of the hardware configuration of a center according to the embodiment of the disclosure; 
         FIG. 3  is a block diagram that shows an example of the hardware configuration of each in-vehicle device according to the embodiment of the disclosure; 
         FIG. 4  is a block diagram that shows a connection relation among the in-vehicle device, a camera and a camera ECU according to the embodiment of the disclosure; 
         FIG. 5  is a block diagram that shows an example of the functional configuration of each in-vehicle device and an example of the functional configuration of the center according to the embodiment of the disclosure; 
         FIG. 6  is a flowchart for illustrating an example of the procedure of a location information transmission process that the in-vehicle device executes; 
         FIG. 7  is a flowchart for illustrating an example of the procedure that the center executes in response to reception of location information; 
         FIG. 8  is a table that shows an example of the configuration of an ID correspondence storage unit; 
         FIG. 9  is a table that shows an example of posted spot information; 
         FIG. 10  is a flowchart for illustrating an example of the procedure that the in-vehicle device executes in response to reception of recommendation information; 
         FIG. 11  is a view that shows an example of display of the pieces of recommendation information; and 
         FIG. 12  is a flowchart that shows a process that the center stores an image in an auxiliary storage device. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     Hereinafter, an embodiment of the disclosure will be described with reference to the accompanying drawings.  FIG. 1  is a diagram that shows an example of the configuration of an information processing system  1  according to the embodiment of the disclosure. As shown in  FIG. 1 , the information processing system  1  includes in-vehicle devices  20  and a center  10 . Each in-vehicle device  20  and the center  10  are able to communicate with each other via a predetermined communication network NW 1 . 
     The predetermined communication network NW 1  includes a mobile communication network, the Internet, and other communication networks. The mobile communication network is a wireless communication network having a large number of base stations as terminals. In  FIG. 1 , for the sake of convenience, only one in-vehicle device  20  is shown; however, the in-vehicle device  20  of each of a plurality of vehicles  30  is configured to be able to communicate with the center  10  via the network NW 1 . 
     Each vehicle  30  is, for example, a hybrid vehicle (HV), a plug-in hybrid vehicle (PHV), an electric vehicle (EV), a gasoline vehicle, a diesel vehicle, or a vehicle of another type. A camera  31  is mounted on each vehicle  30 . The camera  31  is able to capture an image ahead in a traveling direction of the vehicle  30 . The camera  31  is, for example, disposed at an upper center (near an inner mirror) of a front windshield in a vehicle cabin. 
     The in-vehicle device  20  is disposed at a center console of the vehicle  30 , and has an information processing function and a communication function. For example, the in-vehicle device  20  may include a navigation system. In the present embodiment, the in-vehicle device  20  transmits location information about a current location of the vehicle  30  to the center  10 . The in-vehicle device  20  also receives recommendation information on a current location of the vehicle  30 . The recommendation information is transmitted from the center  10  based on the location information. The recommendation information on a current location of the vehicle  30  is information that indicates a spot that is estimated to suit a preference of an occupant, such as a driver, of the vehicle  30  (hereinafter, referred to as vehicle user) out of spots, such as facilities around the current location. The recommendation information may be information that indicates not only a facility around the current location but also a spot of a sightseeing area or a spot of a shop. The recommendation information is an example of visit history information that indicates a visit history of a user of a social networking service (SNS) (hereinafter, referred to as SNS user). The details of the recommendation information will be described later. 
     As the vehicle  30  reaches a location indicated by the visit history of the SNS user, included in the recommendation information, the in-vehicle device  20  causes the camera  31  to capture an image and acquires the image. The details of a process that the in-vehicle device  20  executes will be described later. 
     The center  10  is a collection of one or more computers (information processing devices). In the present embodiment, the center  10  receives location information from the in-vehicle device  20  of each vehicle  30 , and transmits recommendation information on a location associated with the location information to the corresponding in-vehicle device  20 . 
     As shown in  FIG. 1 , the center  10  is connected to a social media server (SNS server)  40  via a network, such as the Internet. The SNS server  40  includes one or more computers that provide a social networking service (SNS). The SNS server  40  stores user information of SNS user, and the like. Various posts posted by SNS users, comments on posts from other SNS users, and the like, are uploaded to the SNS server  40 . Some of various posts include posts each including information that indicates a spot (place) that an SNS user has visited (hereinafter, referred to as posted spot information). The posted spot information is utilized by the center  10  to generate recommendation information. Specifically, the center  10  utilizes all or part of posted spot information from a person of which a preference has a degree of similarity higher by a predetermined degree or above with a preference of a vehicle user from which location information is transmitted out of a posted spot information group as the recommendation information. 
     The recommendation information is information that indicates a history of spots that an SNS user of which a preference has a degree of similarity higher by the predetermined degree or above with a preference indicated by preference information of the vehicle user has visited (visited places). The history of visited places includes the locations (latitudes and longitudes) of visited places, the names of facilities, or the like, in the visited places, the genres of the facilities, or the like, and visited dates and times. The locations, the names of facilities, or the like, the genres of the facilities, or the like, and visited dates and times are, for example, indicated by point of interest (POI) information. The preference information of the vehicle user may include the group (community) which the vehicle user belongs. The preference information of the vehicle user may be acquired based on a post which the vehicle user made a comment, the user information, and the like. 
     Examples of the person of which a preference has a degree of similarity higher by the predetermined degree or above with the preference of the vehicle user include an SNS user who made a friendship with the vehicle user out of SNS users, and an SNS user who belongs to the same group (same community) as the vehicle user in the SNS. Alternatively, examples of the person having a relationship with the vehicle user may include an SNS user who has ever made a comment on a post of the vehicle user and an SNS user who has ever received a comment from the vehicle user in the SNS. This is because these SNS users presumably have a preference having a high degree of similarity with the preference of the vehicle user. Here, SNS users are defined as SNS users who made a friendship with the vehicle user. 
       FIG. 2  is a block diagram that shows an example of the hardware configuration of the center  10  according to the embodiment of the disclosure. The center  10  shown in  FIG. 2  includes a drive device  100 , an auxiliary storage device  102 , a memory device  103 , a CPU  104 , an interface device  105 , and the like, that are connected to one another by a bus B. 
     A program that implements processes in the center  10  is provided by a recording medium  101 , such as a CD-ROM. As the recording medium  101  on which the program is stored is inserted in the drive device  100 , the program is installed from the recording medium  101  into the auxiliary storage device  102  via the drive device  100 . However, the program does not always need to be installed by using the recording medium  101 . Instead, the program may be downloaded from another computer via the network. The auxiliary storage device  102  stores the installed program and also stores necessary files, data, and the like. 
     When instructions to launch the program have been issued, the memory device  103  loads the program from the auxiliary storage device  102  and stores the program. The CPU  104  executes functions associated with the center  10  in accordance with the program stored in the memory device  103 . The interface device  105  is used as an interface for connection with the network. 
       FIG. 3  is a block diagram that shows an example of the hardware configuration of each in-vehicle device  20  according to the embodiment of the disclosure. The in-vehicle device  20  shown in  FIG. 3  includes a drive device  200 , an auxiliary storage device  202 , a memory device  203 , a CPU  204 , a communication device  205 , a display device  206 , an input device  207 , a GPS receiver  208 , and the like. 
     A program that implements processes in the in-vehicle device  20  is provided by a recording medium  201 , such as an SD memory card. As the recording medium  201  on which the program is stored is inserted in the drive device  200 , the program is installed from the recording medium  201  into the auxiliary storage device  202  via the drive device  200 . However, the program does not always need to be installed by using the recording medium  201 . Instead, the program may be downloaded from another computer via the network. The auxiliary storage device  202  stores the installed program and also stores necessary files, data, and the like. 
     When instructions to launch the program have been issued, the memory device  203  loads the program from the auxiliary storage device  202  and stores the program. The CPU  204  implements functions associated with the in-vehicle device  20  in accordance with the program stored in the memory device  203 . The communication device  205  is a device for connection with the network by wireless communication. The communication device  205  may be realized by using, for example, a data communication module (DCM). Examples of the display device  206  include a liquid crystal display. The display device  206  displays a graphical user interface (GUI), or the like, based on the program. For the purpose of easy viewing of the vehicle user, the liquid crystal display of the display device  206  is disposed so as to be exposed from the center console. The input device  207  is used to allow the user to input various operating instructions. For example, the input device  207  may be a touch panel. The GPS receiver  208  acquires location information indicating a location of the vehicle  30 . Specifically, the GPS receiver  208  receives GPS signals that are transmitted from global positioning system (GPS) satellites, and measures a current location (latitude and longitude) of the vehicle  30  based on the GPS signals. 
     In the in-vehicle device  20 , the drive device  200 , the auxiliary storage device  202 , the memory device  203 , the CPU  204 , the display device  206 , and the input device  207 , other than the communication device  205  or the GPS receiver  208 , are components of a display control unit (DCU). The DCU is a kind of electronic control unit (ECU). 
       FIG. 4  is a block diagram that shows a connection relation among the in-vehicle device  20 , the camera  31  and a camera ECU  32  according to the embodiment of the disclosure. 
     The in-vehicle device  20  is connected to the camera ECU  32  via a bus  32 A. The camera ECU  32  is realized by a computer including a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), an input/output interface, a communication interface, an internal bus, and the like. 
     The camera ECU  32  executes image pickup control over the camera  31 . The camera ECU  32  is connected to the camera  31  via, for example, a cable  31 A. A camera that captures an image behind the vehicle  30  or an image lateral to the vehicle  30  may be connected to the camera ECU  32  in addition to the camera  31  that captures an image ahead. The camera ECU  32  is disposed, for example, inside the center console of the vehicle  30 .  FIG. 5  is a block diagram that shows an example of the configuration of each in-vehicle device  20  and an example of the configuration of the center  10  according to the embodiment of the disclosure. As shown in  FIG. 5 , each in-vehicle device  20  includes a map display unit  21 , a location information transmission unit  22 , a recommendation information receiving unit  23 , a recommendation information display unit  24 , a location comparison unit  25 , an image pickup control unit  26 , and the like. These units are implemented by processes that one or more programs installed on the in-vehicle device  20  cause the CPU  204  to execute. The camera ECU  32  is connected to the in-vehicle device  20  via a bus. 
     The map display unit  21  displays a map around a current location of the vehicle  30  (in-vehicle device  20 ) or a map around a location specified by the vehicle user on the display device  206 . The location information transmission unit  22  transmits location information about the current location of the vehicle  30  (in-vehicle device  20 ) and a vehicle ID to the center  10 . The recommendation information receiving unit  23  receives, from the center  10 , recommendation information that the center  10  acquires based on, for example, the location information transmitted by the location information transmission unit  22 . The location comparison unit  25  compares the current location with the visited place included in the recommendation information received by the recommendation information receiving unit  23 . As a distance between the current location and the visited place compared by the location comparison unit  25  becomes shorter than or equal to a predetermined distance D 2 , the recommendation information display unit  24  displays the recommendation information received by the recommendation information receiving unit  23  on the display device  206 . The predetermined distance D 2  is an example of a second predetermined distance, and is, for example, 3 km. As the distance between the current location and the visited place compared by the location comparison unit  25  becomes shorter than or equal to a predetermined distance D 1 , the image pickup control unit  26  causes the camera ECU  32  to capture an image with the use of the camera  31  until the current location of the vehicle  30  passes through the visited place. The predetermined distance D 1  is an example of a first predetermined distance, and is shorter than the predetermined distance D 2 . The predetermined distance D 1  is, for example, 15 m. As the distance between the current location and the visited place compared by the location comparison unit  25  becomes shorter than or equal to 5 m, the image pickup control unit  26  extracts an image that is acquired by the camera  31  and records the image on the recording medium  201  (see  FIG. 2 ) before the current location passes through the visited place. As accessory power is turned off, the image pickup control unit  26  transmits the image data recorded on the recording medium  201  to the center  10 . The details of such a process will be described later with reference to  FIG. 10 . 
     The center  10  includes a location information receiving unit  11 , a posted spot acquisition unit  12 , a recommendation information extracting unit  13 , a recommendation information transmission unit  14 , an image recording control unit  15 , an image database  16 , and the like. These units except the image database  16  are implemented by processes that one or more programs installed on the center  10  cause the CPU  104  to execute. The image database  16  shows a section that is utilized as the image database  16  in the auxiliary storage device  102  of the center  10 . 
     The center  10  utilizes an ID correspondence storage unit  111 , a map information storage unit  112 , and the like. These storage units may be realized by using, for example, the auxiliary storage device  102 , a storage device that is connectable to the center  10  via the network, or the like. 
     The location information receiving unit  11  receives location information and a vehicle ID that are transmitted from each in-vehicle device  20 . The posted spot acquisition unit  12  acquires, from the SNS server  40 , one or more pieces of posted spot information, posted by an SNS user having a relationship on the SNS with the vehicle user associated with the vehicle ID received by the location information receiving unit  11 . The recommendation information extracting unit  13  extracts posted spot information as recommendation information from the posted spot information acquired by the posted spot acquisition unit  12 . Since the recommendation information is an example of visit history information that indicates a visit history, the recommendation information extracting unit  13  may be regarded as a processing unit that acquires a visit history. Since the recommendation information extracting unit  13  acquires location information about a visited place included in a visit history, the recommendation information extracting unit  13  may be regarded as a location information acquisition unit. The recommendation information transmission unit  14  transmits the recommendation information extracted by the recommendation information extracting unit  13  to the in-vehicle device  20  from which the location information is transmitted. 
     A user ID of a vehicle user associated with a vehicle ID on the SNS is stored in the ID correspondence storage unit  111  for each vehicle ID. Map information that is utilized in the navigation system, and the like, is stored in the map information storage unit  112 . POI information including a POI ID, a name, a category (genre), location information (latitude and longitude), and the like, is included in the map information for each POI, such as a shop and a facility. 
     The image recording control unit  15  executes a process of recording image data in the image database  16 . The image data are transmitted from the image pickup control unit  26  of each in-vehicle device  20 . The image data are associated with a corresponding vehicle ID and recorded in the image database  16  by the image recording control unit  15 . 
     Hereinafter, a procedure that is executed on the information processing system  1  will be described.  FIG. 6  is a flowchart for illustrating an example of the procedure of a location information transmission process that each in-vehicle device  20  executes. 
     For example, as the accessory power of the vehicle  30  is turned on by an operation of the vehicle user (Yes in S 101 ), the location information transmission unit  22  acquires the location information (latitude and longitude) of the current location of the vehicle  30  from the GPS receiver  208  (S 102 ). Subsequently, the location information transmission unit  22  transmits the location information to the center  10  (S 103 ). At this time, the location information includes identification information of the vehicle user (hereinafter, referred to as vehicle ID). The vehicle ID may be an ID for each vehicle  30 . Step S 102  and step S 103  are repeated until, for example, the accessory power turns off (No in S 101 ). 
     The location information may be transmitted at predetermined intervals. The predetermined interval may be defined based on an elapsed time or may be defined based on a travel of the vehicle  30 . That is, step S 102  and step S 103  are successively executed even while the vehicle  30  is traveling. Therefore, different location information is transmitted to the center  10  as the vehicle  30  travels. 
     Location information that indicates the location of the vehicle  30  at a time point at which a predetermined operation has been performed by the vehicle user via the input device  207  may be transmitted at that time point. 
     Subsequently, a procedure that the center  10  executes in response to reception of location information that is transmitted from any one of the vehicles  30  will be described.  FIG. 7  is a flowchart for illustrating an example of the procedure that the center  10  executes in response to reception of location information. The procedure shown in  FIG. 7  is executed each time location information is transmitted from any one of the vehicles  30 . 
     As the location information receiving unit  11  receives (acquires) location information (S 201 ), the posted spot acquisition unit  12  acquires a user ID on the SNS (hereinafter, referred to as SNS user ID) corresponding to a vehicle ID (hereinafter, referred to as target vehicle ID) assigned to the location information (hereinafter, referred to as vehicle location information) from the ID correspondence storage unit  111  (S 202 ). That is, the target vehicle ID is converted to the SNS user ID. 
       FIG. 8  is a table that shows an example of the configuration of the ID correspondence storage unit  111 . As shown in  FIG. 8 , an SNS user ID corresponding to a vehicle ID is stored in the ID correspondence storage unit  111  in association with the vehicle ID. An SNS user ID corresponding to a vehicle ID is a user ID that a user associated with the vehicle ID utilizes on the SNS. That is, a vehicle ID and an SNS user ID that are associated with each other are IDs for the same person. Hereinafter, the SNS user ID acquired in step S 202  is referred to as target SNS user ID. 
     Subsequently, the posted spot acquisition unit  12  acquires, from the SNS server  40 , a collection of one or more pieces of public posted spot information (hereinafter, referred to as posted spot information group) posted by one or more other SNS users having a relationship with the SNS user associated with the target SNS user ID (S 203 ). For example, the posted spot acquisition unit  12  acquires, from the SNS server  40 , SNS user IDs of one or more SNS user IDs having a relationship with the SNS user associated with the target SNS user ID. The posted spot acquisition unit  12  acquires, from the SNS server  40 , posted spot information public to other people out of pieces of posted spot information posted in the past by the SNS users associated with the acquired SNS user IDs. The posted spot information public to other people is posted spot information that other people are permitted to see or browse by a poster. Opening posted spot information to the public is implemented by a function called check-in depending on an SNS; however, with what function posted spot information is open to the public varies with the type of SNS. The posted spot information to be acquired may be limited to posted spot information posted in a predetermined period from a current point in time back to the past. A method of acquiring a posted spot information group depends on an application program interface (API), or the like, that an SNS from which a posted spot information group is acquired opens to the public. Therefore, a posted spot information group may be acquired by a procedure other than the above procedure. 
       FIG. 9  is a table that shows an example of the posted spot information. As shown in  FIG. 9 , a piece of posted spot information includes, for example, values (data) of items, such as “SNS user ID”, “name”, “date and time”, “location information”, “spot name” and “accompanying information”. 
     The item “SNS user ID” is an SNS user ID of an SNS user that is a poster of the posted spot information. The item “name” is a name of the SNS user. The item “date and time” is a date and time at which the posted spot information was posted. The item “location information” is location information (latitude and longitude) of a spot at which the posted spot information was posted. When posted spot information is posted by utilizing a portable terminal with a GPS function, such as a smartphone, the portable terminal is able to incorporate location information that is acquired with the GPS function into the posted spot information. The item “spot name” is a name of the spot (place, facility, or the like) at which the posted spot information was posted. The item “accompanying information” is a text message given by the poster, image data captured at the spot, or the like. 
     The configuration of posted spot information can vary with the type of SNS or a poster. Therefore, posted spot information having a configuration different from the configuration shown in  FIG. 9  may be acquired. For example, posted spot information not including the item “spot name” may be acquired. 
     Subsequently, the recommendation information extracting unit  13  extracts posted spot information posted within a range around a location associated with vehicle location information (hereinafter, referred to as vehicle location) from the posted spot information group acquired by the posted spot acquisition unit  12  (S 204 ). For example, posted spot information of which the location information falls within a range of a predetermined distance from the vehicle location in all directions, a range of shorter than or equal to a radius R km about the vehicle location, or the like, may be extracted. As a result, it is possible to exclude posted spot information about a spot remote from the vehicle location, so it is possible to extract posted spot information that is probably useful for the vehicle user. The value of the radius R km may be selected, and just needs to be a value longer than the predetermined distance D 2  (for example, 3 km). This is because, as the distance between the current location and the visited place compared by the location comparison unit  25  becomes shorter than or equal to the predetermined distance D 2 , the recommendation information display unit  24  of the in-vehicle device  20  displays recommendation information received by the recommendation information receiving unit  23  on the display device  206 . 
     When there is no extracted posted spot information (No in S 205 ), the procedure shown in  FIG. 7  ends. When one or more pieces of posted spot information have been extracted (Yes in S 205 ), the recommendation information extracting unit  13  determines whether the number of the extracted pieces of posted spot information (hereinafter, referred to as recommendation candidate information) exceeds a predetermined threshold α. The value of the threshold α may be set to any value by an administrator, or the like, of the center  10  as long as the value prevents an enormous number of pieces of posted spot information from being transmitted to the in-vehicle device  20 . 
     When the number of pieces of recommendation candidate information is smaller than or equal to the threshold a (No in S 206 ), the recommendation information transmission unit  14  transmits all the pieces of recommendation candidate information to the in-vehicle device  20  from which vehicle location information is transmitted (S 207 ). That is, in this case, all the extracted pieces of posted spot information are set for recommendation information. 
     On the other hand, when the number of pieces of recommendation candidate information exceeds the threshold α (Yes in S 206 ), the recommendation information extracting unit  13  acquires user information of the vehicle user and user information of the poster of each piece of recommendation candidate information from the SNS server  40  (S 208 ). That is, the recommendation information extracting unit  13  acquires user information corresponding to the target SNS user ID and user information corresponding to an SNS user ID of each piece of recommendation candidate information from the SNS server  40 . The user information is information that is managed on the SNS server  40  as attribute information of an SNS user. The user information includes, for example, age, sex, a group name, a place of work, an industry, an address, a birth region, a graduated university, a hobby, and the like. The group name is the name of a group (community) that is formed on the SNS. The place of work is the name of a corporation, or the like, of a place of work of an SNS user. The industry is an industry to which the place of work of an SNS user belongs. The address is the home address of an SNS user. The birth region is the name of a home prefecture of an SNS user. The graduated university is the name of a graduated university of an SNS user. The hobby is the hobby of an SNS user. Of pieces of user information to be acquired, user information of a target SNS user (that is, the vehicle user associated with the in-vehicle device  20  from which location information is transmitted) is referred to as vehicle user information below, and the other user information (that is, user information of a poster of recommendation candidate information) is referred to as related user information below. 
     Subsequently, the recommendation information extracting unit  13  acquires, from the SNS server  40 , the number of posted comments on a post to the SNS by the vehicle user (hereinafter, referred to as the number of comments) for each SNS user associated with the related user information (S 209 ). Since comments from other SNS users on a post of each SNS user are managed on the SNS server  40 , it is possible to easily acquire the number of comments. 
     Subsequently, the recommendation information extracting unit  13  calculates a degree of similarity in preference with the vehicle user for the SNS user that is the poster of each piece of recommendation candidate information (that is, the SNS user associated with each piece of related user information) based on the vehicle user information, the pieces of related user information, and the number of comments of the poster of each piece of recommendation candidate information (S 210 ). 
     The degree of similarity in preference is an index that indicates a degree to which a preference is similar or common, and indicates that a similarity or commonality in preference becomes higher as the value increases. For example, a degree of similarity in preference for an SNS user is calculated by using the following mathematical expression (1). 
       (Degree of similarity in preference)= w 1×(Number of comments)+ w 2×(Common place of work term)+ w 3×(Common industry term)+ w 4×(Common living region term)+ w 5×(Common sex term)+ w 6×(Common generation term)  (1)
 
     Here, the common place of work term is one when the place of work is the same as that of the vehicle user, and is zero when the place of work is different from that of the vehicle user. The common industry term is one when the industry is the same as that of the vehicle user, and is zero when the industry is different from that of the vehicle user. The common living region term is one when the prefecture name of the address is the same as that of the vehicle user, and is zero when the prefecture name of the address is different from that of the vehicle user. The common sex term is one when the sex is the same as that of the vehicle user, and is zero when the sex is different from that of the vehicle user. The common generation term is one when the generation is the same as that of the vehicle user, and is zero when the generation is different from that of the vehicle user. The condition that the generation is the same may be, for example, the condition that the tenths places of the ages coincide with each other or may be the condition that a difference between the age of one and the age of the other falls within a predetermined value (for example, within 10). Here, w1 to w6 are weighting factors. The weighting factors just need to be selected. 
     According to the mathematical expression (1), as the number of comments increases, the degree of similarity in preference becomes higher. This means that a degree of similarity in preference is calculated based on a history of conversation (communication) on the SNS. This is because, as the number of times of conversation (communication) on the SNS increases, it is presumable that preferences are probably similar or common to each other. In other words, this is because it is presumable that the number of times of conversation (communication) on the SNS increases since the preferences are similar or common to each other. The number of comments may be a value in a predetermined period back from a current point in time to the past or may be a value in all the period in the past. 
     According to the mathematical expression (1), as the attribute of the SNS user, such as a place of work, an industry, a living region (address), sex and a generation, becomes more similar or common, the degree of similarity in preference becomes higher. This is because people having a high similarity or commonality in attribute to each other presumably tend to have a similar or common preference. 
     Whether the place of work is the same, whether the industry is the same, whether the prefecture name of the address is the same, whether the sex is the same and whether the generation is the same are determined by comparing vehicle user information with related user information. 
     The common living region term and the common generation term may not always be zero or one. For example, the common living region term may be a value based on the number of characters at a common part of the addresses. The common generation term may be a value based on the inverse of a difference in age. 
     Another term may be added. For example, whether the uses are family, whether the users have a common hobby, or the like, may be reflected by a degree of similarity in preference. Whether the users are family may be determined based on whether the addresses are the same. 
     Subsequently, the recommendation information extracting unit  13  sorts the pieces of recommendation candidate information in descending order of the degree of similarity in preference, calculated for the poster of each piece of the recommendation candidate information (S 211 ). Subsequently, the recommendation information transmission unit  14  transmits the top a pieces of recommendation candidate information in the sort order to the in-vehicle device  20  from which the vehicle location information is transmitted (S 212 ). That is, the top a pieces of recommendation candidate information are used as the recommendation information. Here, the degree of similarity in preference is an index that indicates a similarity in preference. Therefore, since the pieces of recommendation candidate information having a higher degree of similarity in preference are used as the recommendation information, it is expected to provide recommendation information that the vehicle user probably interests. 
     At the timing of step S 207  or the timing of step S 211 , when there is a piece of recommendation information not including the spot name out of the pieces of recommendation information to be transmitted, the recommendation information transmission unit  14  may identify the spot name by consulting the map information storage unit  112 , and may provide the spot name to the recommendation information. For example, the recommendation information transmission unit  14  may acquire, from the map information storage unit  112 , POI information corresponding to location information of recommendation information not including a spot name, and may provide a name included in the POI information to the recommendation information as a spot name. 
     Subsequently, the procedure that the in-vehicle device  20  executes in response to reception of recommendation information will be described.  FIG. 10  is a flowchart for illustrating an example of the procedure that the in-vehicle device  20  executes in response to reception of recommendation information. 
     As the accessory power of the vehicle  30  is turned on by an operation of the vehicle user (Yes in S 301 ), the recommendation information receiving unit  23  waits for reception of recommendation information from the center  10  (S 302 ). As the recommendation information receiving unit  23  receives recommendation information transmitted from the center  10  (Yes in S 302 ), the location comparison unit  25  compares the current location with the visited place included in the recommendation information received by the recommendation information receiving unit  23 , and determines whether a distance between the visited place and the current location is shorter than or equal to the predetermined distance D 2  (S 303 ). The predetermined distance D 2  is, for example, 3 km. When the location comparison unit  25  determines that the distance is not shorter than or equal to the predetermined distance D 2  (No in S 303 ), the location comparison unit  25  repeatedly executes the process of step S 303  until the distance becomes shorter than or equal to the predetermined distance D 2 . 
     When the location comparison unit  25  determines that the distance is shorter than or equal to the predetermined distance D 2  (Yes in S 303 ), the recommendation information display unit  24  displays the visited place of the SNS user included in the recommendation information received by the recommendation information receiving unit  23  on a map that is displayed on the display device  206  (see  FIG. 3 ) by the map display unit  21  in a superimposed manner (S 304 ). 
     Step S 302  is repeated until, for example, the accessory power turns off (No in S 301 ). 
       FIG. 11  is a view that shows an example of display of pieces of recommendation information. As shown in  FIG. 11 , each piece of recommendation information is, for example, displayed on the map that is displayed on the display device  206  by the map display unit  21  in association with the location of a POI corresponding to the location information or spot name of the recommendation information. In the example of  FIG. 11 , predetermined graphic symbols (open stars in  FIG. 11 ) are superimposed at the locations of POIs corresponding to the pieces of recommendation information on the map, and messages “XXX has/have been here.” are respectively displayed in a balloon b1 and a balloon b2 for the predetermined graphic symbols. Here, the name included in a corresponding piece of recommendation information is applied to “XXX”. As in the case of the balloon b2, pieces of recommendation information, corresponding to the same POI, may be collectively displayed in one balloon. 
     The vehicle user is allowed to enjoy driving, that is, stop by a spot associated with recommendation information displayed as shown in  FIG. 11  or select the spot for a destination by consulting the recommendation information. 
     A display mode of recommendation information is not limited to the display mode shown in  FIG. 11 . For example, the recommendation information display unit  24  may display a list of pieces of recommendation information received by the recommendation information receiving unit  23  at a predetermined position on the display device  206  of the in-vehicle device  20  in a menu form, or the like. Recommendation information selected by the vehicle user from among the list may be displayed as shown in  FIG. 11 . In this case, the sequence of display of the pieces of recommendation information in the list may be set in accordance with the sort order (that is, the descending order of a degree of similarity in preference) of step S 211  of  FIG. 7 . For this purpose, the recommendation information transmission unit  14  of the center  10  may transmit the pieces of recommendation information to the in-vehicle device  20  in a state where the pieces of recommendation information are arranged in the sort order or a degree of similarity in preference may be assigned to each piece of recommendation information and then each piece of recommendation information may be transmitted to the in-vehicle device  20 .  FIG. 7  shows an example in which a degree of similarity in preference is calculated only when the number of pieces of recommendation candidate information exceeds the threshold α. Alternatively, even when the number of pieces of recommendation candidate information is smaller than or equal to the threshold α, step S 207  may be executed after step S 208  to step S 211  are executed. 
     Accompanying information (a text message, image data, and the like) included in each piece of recommendation information may be displayed. For example, accompanying information of each piece of recommendation information shown in  FIG. 11  or accompanying information of each piece of recommendation information selected by the vehicle user from among the list may be displayed. As a result, the vehicle user is allowed to obtain detailed information provided by other people having a relationship on the SNS with regard to a POI corresponding to a specific one of the pieces of recommendation information. 
     Subsequently, the location comparison unit  25  compares the current location with the visited place included in the recommendation information received by the recommendation information receiving unit  23 , and determines whether a distance between the visited place and the current location is shorter than or equal to the predetermined distance D 1  (S 305 ). In this case, when there is a plurality of visited places, the location comparison unit  25  carries out determination as to a distance between each visited place and the current location. The predetermined distance D 1  is, for example, 15 m. When the location comparison unit  25  determines that the distance is not shorter than or equal to the predetermined distance D 1  for any visited place (No in S 305 ), the location comparison unit  25  repeatedly executes the process of step S 305  until the distance becomes shorter than or equal to the predetermined distance D 1 . 
     When the location comparison unit  25  determines that the distance is shorter than or equal to the predetermined distance D 1  for any one of the visited places (Yes in S 305 ), the image pickup control unit  26  outputs capturing start instructions to the camera ECU  32  (S 306 ). Thus, the camera ECU  32  causes the camera  31  to capture an image. The camera  31  is caused to capture an image until the current location of the vehicle  30  passes through the visited place from which the distance becomes close to the predetermined distance D 1  or shorter (approaching visited place). 
     Subsequently, the location comparison unit  25  compares the current location with the visited place that the vehicle  30  is approaching, and determines whether the current location is close to the approaching visited place (S 307 ). Whether the current location is close to the approaching visited place is determined based on, for example, whether the distance between the current location and the approaching visited place is shorter than or equal to 5 m. When the location comparison unit  25  determines that the current location is not close to the approaching visited place (No in S 307 ), the process of step S 307  is repeatedly executed until the current location becomes close to the approaching visited place. 
     Subsequently, when the location comparison unit  25  determines that the current location is close to the approaching visited place (Yes in S 307 ), the image pickup control unit  26  extracts an image acquired by the camera  31  at the current location, and records the image on the recording medium  201  (see  FIG. 2 ) (S 308 ). 
     Subsequently, the location comparison unit  25  compares the current location with the visited place near the vehicle  30 , and determines whether the current location has passed through the visited place (S 309 ). When the location comparison unit  25  determines that the vehicle  30  has not passed through the visited place (No in S 309 ), the process returns to step S 308 . 
     In this way, as a result of repetition of step S 308  and step S 309 , an image that is acquired by the camera  31  is extracted and is recorded on the recording medium  201  (see  FIG. 2 ) in a period from when the location comparison unit  25  determines that the current location is close to the visited place (Yes in S 307 ) to when the location comparison unit  25  determines that the current location has passed through the visited place (Yes in S 309 ) (from when the current location becomes close to the visited place to when the current location passes through the visited place). 
     When the location comparison unit  25  determines that the current location has passed through the visited place (Yes in S 309 ), the image pickup control unit  26  outputs capturing end instructions to the camera ECU  32  (S 310 ). As a result, the camera ECU  32  causes the camera  31  to end capturing an image. 
     As the process of step S 310  ends, the process returns to step S 301 . 
     As the accessory power is turned off (No in S 301 ), the image pickup control unit  26  determines whether an image has been recorded on the recording medium  201  (see  FIG. 2 ) (S 311 ). This is because, when an image has been recorded on the recording medium  201  (see  FIG. 2 ), the image is transmitted to the center  10 . 
     When the image pickup control unit  26  determines that an image has been recorded (Yes in S 311 ), the image pickup control unit  26  transmits the image recorded on the recording medium  201  (see  FIG. 2 ) to the center  10  via the communication device  205  (see  FIG. 3 ) (S 312 ). The image transmitted from the image pickup control unit  26  (the in-vehicle device  20 ) is recorded on the auxiliary storage device  102  of the center  10 . At this time, the image is recorded in association with the vehicle ID. The vehicle user is allowed to browse the image with a smartphone or a personal computer and download the image to the smartphone or the personal computer by utilizing an application for browsing the image recorded on the auxiliary storage device  102 . Here, the image pickup control unit  26  may transmit to the smartphone or the personal computer of the vehicle user directly. The image pickup control unit  26  may transmit to the other server than the center  10  and the transmitted image may be recorded in the other server. 
     On the other hand, when the image pickup control unit  26  determines that no image has been recorded (No in S 311 ), the image pickup control unit  26  ends the series of processes. 
     Here, the mode in which, as the accessory power is turned off (No in S 301 ), the image pickup control unit  26  determines whether an image has been recorded on the recording medium  201  (see  FIG. 2 ) (S 311 ) and, when an image has been recorded on the recording medium  201  (Yes in S 311 ), the image pickup control unit  26  transmits the image to the center  10  is described. However, the disclosure is not limited to this mode. For example, it may be periodically determined whether an image has been recorded, and, when an image has been recorded, the image is transmitted to the center  10 . 
       FIG. 12  is a flowchart that shows a process in which the center  10  records an image on the auxiliary storage device  102 . The process shown here is a process that is executed in accordance with the same program as the program of the process shown in  FIG. 7 , and is executed by the image recording control unit  15  of the center  10 . 
     The image recording control unit  15  determines whether image data have been received from the in-vehicle device  20  (S 401 ). When image data have been received (Yes in S 401 ), the image recording control unit  15  records the received image data in the image database  16  (S 402 ). When no image data have been received (No in S 401 ), the image recording control unit  15  returns the process to step S 401 , and executes the process of step S 401 . The image recording control unit  15  executes the process of step S 401  at intervals of a predetermined time. This is to periodically determine whether image data have been received. 
     As described above, the center  10  according to the embodiment transmits visit history information (recommendation information) indicating a visit history of the SNS user of which a preference has a high degree of similarity with the preference of the vehicle user to the in-vehicle device  20  mounted on the vehicle  30  of the vehicle user. 
     In the in-vehicle device  20  that has received the recommendation information, as the distance between the current location and the visited place compared by the location comparison unit  25  becomes shorter than or equal to the predetermined distance D 2 , the recommendation information display unit  24  displays the recommendation information received by the recommendation information receiving unit  23  on the display device  206 . As a result, the vehicle user is allowed to recognize that the visited place of the SNS user having a similar preference to that of the vehicle user is located near the current location, and is allowed to be informed of the name of the SNS user by seeing the balloon b1 or balloon b2 displayed on the display device  206  as shown in  FIG. 11 . In this case, the vehicle user is allowed to drive toward the displayed visited place, and is allowed to visit the same visited place as the SNS user. 
     As the distance between the current location and the visited place becomes shorter than or equal to the predetermined distance D 1 , the image pickup control unit  26  outputs capturing start instructions to the camera ECU  32 , and the camera  31  starts capturing an image. The camera  31  captures an image until the current location of the vehicle  30  passes through the visited place that the current location has approached at a distance shorter than or equal to the predetermined distance D 1 . For this reason, images from a spot at which the distance between the current location and the visited place becomes the predetermined distance D 1  to when the current location passes through the visited place are acquired by the camera  31 . 
     As the vehicle  30  reaches near the visited place, the image pickup control unit  26  extracts the image acquired by the camera  31  at the current location, and records the image on the recording medium  201  (see  FIG. 2 ). For this reason, it is possible to automatically and reliably record a captured image of a visited place included in recommendation information on the recording medium  201 , so it is possible to acquire image data that suit an own preference with the use of the camera  31  mounted on the vehicle  30  even when the vehicle user does not take an image. 
     Therefore, according to the embodiment, it is possible to provide the in-vehicle device  20 , a control method for the in-vehicle device  20  and a control program for the in-vehicle device  20 , which are able to acquire an image that suits a preference of a user of a vehicle. 
     Image data recorded on the recording medium  201  in the in-vehicle device  20  are transmitted to the center  10 , and are recorded on the auxiliary storage device  102 . 
     Therefore, according to the embodiment, it is possible to provide the center  10  (information processing device), the information processing system  1 , an information processing method and an information processing program, which are able to acquire an image that suits a preference of a user of a vehicle. 
     The mode in which the image pickup control unit  26  of the in-vehicle device  20  transmits an image recorded on the recording medium  201  to the center  10  and the image is recorded on the auxiliary storage device  102  in association with a vehicle ID is described above. Alternatively, a mode in which the in-vehicle device  20  does not transmit an image to the center  10  and a vehicle user acquires an image recorded on the recording medium  201  may be employed. In this case, the center  10  does not need to execute the process of recording an image on the auxiliary storage device  102  in association with a vehicle ID. 
     The mode in which an SNS user is defined as an SNS user who made a friendship with a vehicle user is described. Instead, an SNS user may be an SNS user who has no friendship with a vehicle user. In such a case, an item that indicates whether the SNS user is a friend just needs to be included when a degree of similarity in preference is calculated. For example, a degree of similarity in preference just needs to be calculated by using the following mathematical expression (2). 
       (Degree of similarity in preference)= w 1×(Number of comments)+ w 2×(Common place of work term)+ w 3×(Common industry term)+ w 4×(Common living region term)+ w 5×(Common sex term)+ w 6×(Common generation term)+ w 7×(Friend term)  (2)
 
     Here, w7, as well as w1 to w6, is a weighting factor. The weighting factors just need to be selected. The friend term is one when an SNS user and a vehicle user are friends on social media, and is zero when an SNS user and a vehicle user are not friends on social media. 
     With the mathematical expression (2), it is possible to obtain a degree of similarity in preference with an item that indicates whether an SNS user and a vehicle user are friends on social media in addition to a place of work, an industry, a living region (address), sex and a generation. A degree of similarity in preference becomes higher as the attribute of an SNS user is more similar or common, and becomes higher when the SNS user is a friend. This is because people having a high similarity or commonality in attribute to each other presumably tend to have a similar or common preference and, furthermore, preferences presumably tend to be more similar or common when people are friends on social media than when people are not friends. 
     The example in which location information during traveling of the vehicle  30  is automatically transmitted to the center  10  and posted spot information about a spot around a location associated with the location information is a candidate for recommendation information is described. Alternatively, location information based on which posted spot information is extracted may be not limited to location information about the current location of the vehicle  30 . For example, at the time when a vehicle user has set a destination by utilizing a navigation function of the in-vehicle device  20 , the location information transmission unit  22  may transmit location information about the destination to the center  10  as location information to be processed in  FIG. 7 . As a result, the vehicle user is allowed to obtain recommendation information around a destination in advance. 
     The location information transmission unit  22  may transmit location information about a spot freely selected by a vehicle user on a map that is displayed by the map display unit  21  to the center  10  as location information to be processed in  FIG. 7 . As a result, the vehicle user is allowed to obtain recommendation information around a selected spot, and is allowed to obtain reference information, for example, at the time when the vehicle user is wavering to select a destination. 
     The example in which the in-vehicle device  20  is a terminal that receives recommendation information from the center  10  is described. Alternatively, the present embodiment may be applied to a terminal that is carried with a person, such as a smartphone and a tablet terminal. That is, these terminals may include the functional configuration of the in-vehicle device  20  shown in  FIG. 5 . In this case, the location information transmission unit  22  of each terminal may transmit, to the center  10 , location information measured by a GPS function of the terminal, positional information about a destination selected by a user in a navigation application of the terminal, location information about a spot selected by a user in a map application of the terminal, or the like. A place name included in information stored in the terminal may be utilized. For example, when the terminal has a calendar function (schedule function) and a place name is included in a schedule entered into the calendar function, the location information transmission unit  22  of the terminal may transmit location information corresponding to the place name to the center  10 . As for the in-vehicle device  20  as well, when a driving schedule or other schedule information is stored, location information associated with a place name included in the schedule information may be set for information to be transmitted to the center  10 . 
     The embodiment in the case where an SNS that is an example of social media is utilized is described above. The present embodiment may be applied to social media other than the SNS, from which a relationship between users is able to be acquired. 
     As described above, according to the present embodiment, it is possible to display, on the mobile terminal, recommendation information around a location associated with location information that the mobile terminal, such as the in-vehicle device  20  and a portable terminal, transmits to the center  10  at predetermined timing. Here, the recommendation information is information about a spot that another individual who has a relationship with a user who uses the mobile terminal on social media, such as an SNS, has actually visited. Therefore, according to the present embodiment, it is possible to provide location information (posted spot information) based on interactions between people. As a result, it is expected to provide recommendation information that further suits a preference of a vehicle user. In addition, it is possible to give an opportunity to the vehicle user to share an experience with other SNS users with whom the vehicle user has interactions. 
     In the present embodiment, the center  10  is an example of the information processing device. The in-vehicle device  20  is an example of a terminal. The location information that is transmitted from the in-vehicle device  20  is an example of first location information. The posted spot information and the recommendation information are an example of second location information. The vehicle user is an example of a first user. The SNS user who has a relationship with the vehicle user is an example of a second user. The location information receiving unit  11  is an example of a receiving unit. The recommendation information transmission unit  14  is an example of a transmission unit. 
     The embodiment of the disclosure is described in detail above; however, the disclosure is not limited to the specific embodiment. The disclosure may be modified or altered in various forms within the scope of the disclosure recited in the appended claims.