Patent ID: 9595106
Date: 2017-03-14
CPC Classifications: G06T,H04N

Claim:
1. A calibration apparatus for calibrating a projection apparatus projecting a projection image, the calibration apparatus comprising: a captured image acquiring unit configured to acquire a captured image which is generated by capturing a projection image by an image capturing unit at each change of at least one of a relative position between the projection apparatus and a plane body and a relative posture between the projection apparatus and the plane body, the projection image being projected onto the plan body; a reflection position estimating unit configured to acquire a plurality of reflection positions, at which a plurality of light beams are reflected on the plane body, at each change of at least one of a position of the plane body and a posture of the plane body using a predetermined correspondence relationship between a pixel of the captured image and a position on the plane body; a plane body position posture estimating unit configured to estimate a plurality of positions and postures of the plane body so as to minimize a degree of misfit of the plurality of reflection positions, at which one light beam is reflected on the plane body at each change of at least one of the position of the plane body and the posture of the plane body, from a straight line of the plurality of reflection positions; and a projection light beam identifying unit configured to identify an equation of the light beam by transforming the plurality of reflection positions of the light beam into a plurality of coordinates in a three-dimensional space using the position of and the posture of the plane body reflecting the one light beam and by causing the plurality of coordinates to approximate the straight line.