Image display system, terminal, method, and program

Abstract

The present invention provides an image display system, a terminal, a method, and a program that can quickly and accurately display an image corresponding to a particular location. An image display system according to one example embodiment of the present invention includes: a current image acquisition unit configured to acquire a first image captured by a mobile terminal; an information acquisition unit configured to acquire information including a position and an orientation of the mobile terminal that has captured the first image; a past image acquisition unit configured to acquire a second image based on the position and the orientation of the mobile terminal and a position and an orientation associated with the second image stored in the past in a storage device; and a difference detection unit configured to detect a difference between the first image and the second image.

1 . An image display system comprising:
 a first image acquisition unit configured to acquire a first image captured by a mobile terminal;   an information acquisition unit configured to acquire information including a position and an orientation of the mobile terminal that has captured the first image;   a second image acquisition unit configured to, 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, acquire the second image; and   a difference detection unit configured to detect a difference between the first image and the second image.   
     
     
         2 . The image display system according to  claim 1  further comprising an image display unit configured to display the difference in addition to at least one of the first image and the second image. 
     
     
         3 . The image display system according to  claim 2 , wherein the image display unit displays a frame surrounding a region including the difference on the first image and the second image. 
     
     
         4 . The image display system according to  claim 1 , wherein the position and the orientation associated with the second image are a position and an orientation of a captured range of the second image. 
     
     
         5 . The image display system according to  claim 1  further comprising a similarity degree calculation unit configured to calculate a similarity degree indicating resemblance of the position and the orientation of the mobile terminal to the position and the orientation associated with the second image,
 wherein the second image acquisition unit acquires the second image based on the similarity degree. 
 
     
     
         6 . The image display system according to  claim 1  further comprising:
 the mobile terminal having the first image acquisition unit and the information acquisition unit; and 
 a server having the second image acquisition unit, 
 wherein the difference detection unit is provided either in the mobile terminal or the server. 
 
     
     
         7 . The image display system according to  claim 1  further comprising a peripheral information display unit configured to display the position associated with the second image present within a predetermined distance from the position of the mobile terminal on a map. 
     
     
         8 . The image display system according to  claim 1  further comprising a proximity notification unit configured to perform notification when the second image is present within a predetermined distance from the position of the mobile terminal. 
     
     
         9 . The image display system according to  claim 1  further comprising an object recognition unit configured to recognize an object included in the first image and the second image and output information on the object. 
     
     
         10 . The image display system according to  claim 1  further comprising a condition acquisition unit configured to acquire a condition designated by a user of the mobile terminal,
 wherein the second image acquisition unit acquires the second image based on the designated condition in addition to the position and the orientation of the mobile terminal and the position and the orientation associated with the second image. 
 
     
     
         11 . 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.   
     
     
         12 . 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.   
     
     
         13 . 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.