Photographing apparatus and communication establishing method and program

A communication establishing method to establish a communication between a first photographing apparatus and a second photographing apparatus, the communication establishing method comprising:

• a first encoding part of said first photographing apparatus creating a first code image containing first authentication information;
• displaying said first code image on a first display part of said first photographing apparatus;
• taking a photograph of said first code image displayed on said first display part by a second photographing part of said second photographing apparatus;
• decoding said first authentication information from said first code image by a second decoding part of said second photographing apparatus;
• creating new authentication information from the first authentication information acquired by said second decoding part and second authentication information of said second photographing apparatus:
• creating, by a second encoding part of said second photographing apparatus, encoded connection information by encoding communication setup information of said second photographing apparatus;
• displaying a second code image on a second display part of said second photographing apparatus, said second code image containing said new authentication information and said encoded connection information of said second photographing apparatus;
• taking a photograph of said second code image displayed on said second display part by a first photographing part of said first photographing apparatus;
• decoding said encoded connection information from the photograph of said second code image by a first decoding part of said first photographing apparatus;
• restoring said communication setup information from said encoded connection information by using said first authentication information by a restoration part of said first photographing apparatus;
• acquiring, by said first photographing apparatus, the second authentication information from the new authentication information contained in said code image;
• and
• causing a first radio communication part of said first photographing apparatus to communicate with said second photographing apparatus by using said communication setup information, which is restored by said restoration part of said first photographing apparatus, and said second authentication information acquired from the new authentication information.

A non-transitory computer readable recording medium storing a computer readable program for causing a first photographing apparatus to perform a communication establishing method to establish a communication between the first photographing apparatus and a second photographing apparatus,

• said communication establishing method comprising:
• a first encoding part of said first photographing apparatus creating a first code image containing first authentication information;
• displaying said first code image on a first display part of said first photographing apparatus;
• taking a photograph of said first code image displayed on said first display part by a second photographing part of said second photographing apparatus;
• decoding said first authentication information from said first code image by a second decoding part of said second photographing apparatus;
• creating new authentication information from the first authentication information acquired by said second decoding part and second authentication information of said second photographing apparatus:
• creating, by a second encoding part of said second photographing apparatus, encoded connection information by encoding communication setup information of said second photographing apparatus;
• displaying a second code image on a second display part of said second photographing apparatus, said second code image containing said new authentication information and said encoded connection information of said second photographing apparatus;
• taking a photograph of said second code image displayed on said second display part by a first photographing part of said first photographing apparatus;
• decoding said encoded connection information from the photograph of said second code image by a first decoding part of said first photographing apparatus;
• restoring said communication setup information from said encoded connection information by using said first authentication information by a restoration part of said first photographing apparatus;
• acquiring, by said first photographing apparatus, the second authentication information from the new authentication information contained in said code image;
• and
• causing a first radio communication part of said first photographing apparatus to communicate with said second photographing apparatus by using said communication setup information, which is restored by said restoration part of said first photographing apparatus, and said second authentication information acquired from the new authentication information.