1 . A visit assistance device comprising: at least one memory storing program instructions; and at least one processor configured to execute the instructions stored in the memory to: acquire a visit destination user of a visitor who arrives at an entrance of a predetermined space; acquire a first photographed image as a photographed image of the visitor by a photographing device which is installed in the entrance; perform control so as to perform face authentication of the visitor based on the first photographed image; and perform a notification about a visit to a terminal device associated with the visit destination user in a case where the face authentication of the visitor succeeds.
2 . The visit assistance device according to claim 1 , wherein the processor is further configured to execute the instructions to notify the terminal device of information of the visitor in a case where the face authentication of the visitor succeeds.
3 . The visit assistance device according to claim 1 , wherein the processor is further configured to execute the instructions to: specify a seat position in which a user is seated in the space; and cause a display device installed in the entrance to display a map which indicates the specified seat position together with information identifying the user.
4 . The visit assistance device according to claim 3 , wherein the processor is further configured to execute the instructions to perform control such that as for display of the seat position, only a user who satisfies a predetermined condition among seated users is displayed.
5 . The visit assistance device according to claim 4 , wherein the processor is further configured to execute the instructions to perform performs control such that as for display of the seat position, only a user corresponding to the visit destination user among seated users is displayed.
6 . The visit assistance device according to claim 3 , wherein the processor is further configured to execute the instructions to cause the display device to further display a user interface image for accepting a visit appointment, and perform the notification in a case where an appointment for a visit is requested.
7 . the visit assistance device according to claim 3 , wherein the processor is further configured to execute the instructions to, in a case where a response result to the notification is received from the terminal device, cause the display device to display the response result.
8 . The visit assistance device according to claim 3 , wherein the processor is further configured to execute the instructions to: acquire a second photographed image as a photographed image of an inside of the space; search for a face image of a user which is in advance stored from the second photographed image; and specify the seat position of the user based on a position where the face image is searched for.
9 . The visit assistance device according to claim 3 , wherein an installation position of the terminal device in the space is in advance defined, the processor is further configured to execute the instructions to: acquire a third photographed image as a photographed image of a user of the terminal device which is photographed by a camera of the terminal device, perform control so as to perform the face authentication of a user who uses the terminal device based on the third photographed image, and in a case where the face authentication of the user who uses the terminal device succeeds, specify the installation position of the terminal device as the seat position of the user.
10 . The visit assistance device according to claim 1 , wherein the processor is further configured to execute the instructions to specify a participant who participates in a conference at the same date and time together with the visitor based on conference information which is in advance stored and includes a definition of a date and time when a conference is held and a participant in the conference in a case where the face authentication of the visitor succeeds and acquire the specified participant as the visit destination user.
11 . The visit assistance device according to claim 1 , wherein the notification includes personal information of a visitor.
12 . The visit assistance device according to claim 1 , wherein the notification includes history information about a visit of a visitor.
13 . The visit assistance device according to claim 1 , wherein the notification includes information indicating whether or not a visitor corresponds to a predetermined person.
14 . A visit assistance system comprising: an information processing device configured to be installed in an entrance of a predetermined space; and a visit assistance device configured to assist a visit to a user in the space, wherein the visit assistance device includes at least one memory storing program instructions; and at least one processor configured to execute the instructions stored in the memory to: acquire a visit destination user of a visitor who arrives at the entrance of the space, acquire a first photographed image as a photographed image of the visitor by a camera of the information processing device, perform control so as to perform face authentication of the visitor based on the first photographed image, and perform a notification about a visit to a terminal device associated with the visit destination user in a case where the face authentication of the visitor succeeds.
15 . The visit assistance system according to claim 14 , wherein the processor is further configured to execute the instructions to specify a seat position in which a user is seated in the space, and cause the information processing device to display a map which indicates the specified seat position together with information identifying the user.
16 . A visit assistance method comprising: acquiring a visit destination user of a visitor who arrives at an entrance of a predetermined space; acquiring a first photographed image as a photographed image of the visitor by a photographing device which is installed in the entrance; performing control so as to perform face authentication of the visitor based on the first photographed image; and performing a notification about a visit to a terminal device associated with the visit destination user in a case where the face authentication of the visitor succeeds.
17 . A non-transitory computer-readable medium configured to store a program causing a computer to execute: a visit destination acquisition step of acquiring a visit destination user of a visitor who arrives at an entrance of a predetermined space; an image acquisition step of acquiring a first photographed image as a photographed image of the visitor by a photographing device which is installed in the entrance; an authentication control step of performing control so as to perform face authentication of the visitor based on the first photographed image; and a notification step of performing a notification about a visit to a terminal device associated with the visit destination user in a case where the face authentication of the visitor succeeds.
