Patent ID: 6990429
Filing Date: 2006-01-24
Classification: G06T

Abstract:
1. An information processing apparatus for correcting a field angle of an image sensing device, which senses an image of a real space that includes a feature point whose position on the real space is known, comprising: position detection unit adapted to detect a position of the feature point included in the image of the real space sensed by the image sensing device in that image; measurement unit adapted to measure a position, orientation, and field angle of the image sensing device; position calculation unit adapted to set a virtual viewpoint specified by the position, orientation, and field angle measured by said measurement unit, and calculating a position of the feature point, which is seen when the real space is viewed from that viewpoint, in the image; first correction amount calculation unit adapted to calculate a correction amount of the position and/or a correction amount of the orientation of the image sensing device to minimize a deviation between the position detected by said position detection unit and the position calculated by said position calculation unit in the image sensed by the image sensing device; and second correction amount calculation unit adapted to calculate a correction amount of the field angle of the image sensing device in accordance with the deviation minimized by said first correction amount calculation unit or the correction amount of the position of the image sensing device calculated by said first correction amount calculation unit.