Patent ID: 8797360

Claim:
An image display device for displaying an image rendering a scene viewed from a viewpoint in a virtual space in a line of sight, the virtual space having at least one virtual object disposed therein, the image display device comprising: viewpoint moving unit configured to perform at least one of a process of moving a position of the viewpoint and a process of changing the line of sight, according to a viewpoint moving operation performed by a user; pitch angle change center point position calculation unit configured to calculate a position of a pitch angle change center point which exists a given distance away from the viewpoint on a straight line extending from the viewpoint in the line of sight; and pitch angle change unit configured to rotate the viewpoint about the pitch angle change center point keeping the line of sight so that the line of sight is directed to the pitch angle change center point by changing a pitch angle of the viewpoint about the pitch angle change center point according to a pitch angle change operation performed by the user.