Image display system, terminal, method, and program

A terminal comprising:

• a first image acquisition unit configured to acquire a first image captured;
• an information acquisition unit configured to acquire information including a position and an orientation;
• and
• a difference detection unit configured to receive a second image acquired based on the position and the orientation and a position and an orientation associated with the second image stored in the past in a storage device and detect a difference between the first image and the second image.

A method comprising:

• acquiring a first image captured by a mobile terminal;
• acquiring information including a position and an orientation of the mobile terminal that has captured the first image;
• based on the position and the orientation of the mobile terminal and a position and an orientation associated with a second image stored in the past in a storage device, acquiring the second image;
• and
• detecting a difference between the first image and the second image.

A non-transitory storage medium in which a program is stored, the program being configured to cause a computer to execute:

• acquiring a first image captured by a mobile terminal;
• acquiring information including a position and an orientation of the mobile terminal that has captured the first image;
• based on the position and the orientation of the mobile terminal and a position and an orientation associated with a second image stored in the past in a storage device, acquiring the second image;
• and
• detecting a difference between the first image and the second image.