Patent ID: 7542051
Filing Date: 2009-06-02
Classification: G06T

Abstract:
1. A calibration method for acquiring a correction value to correct position and orientation measured by using a position and orientation sensor provided on a physical object, the calibration method comprising: a first measuring step of measuring position and orientation of the physical object when a calibration is started; a capturing step of capturing an image of the physical object by a camera; a virtual object generation step of generating an image of a virtual object existing on a plane on which the physical object can be moved; a displaying step of displaying a composite image formed by superimposing the image of the virtual object on a captured image of the physical object; a detecting step of detecting an instruction indicating that an observer viewing the composite image regards the position and the orientation of the physical object as matching the position and the orientation of the virtual object; a second measuring step of measuring position and orientation of the physical object when the instruction is detected; an acquiring step of acquiring the correction value expressed by parallel movement of the physical object on the plane and rotation of the physical object about an axis set in the direction perpendicular to the plane on the basis of the position and orientation measured in the first measuring step and the position and orientation measured in the second measuring step.