Summary: Camera Calibration Based on 3D­Point­Grid ?
X.­F. Zhang 1 , A. Luo 2 , W. Tao 1 and H. Burkhardt 3y
1 Tech. Informatik I, Hamburg­Harburg University of Technology, 21071 Hamburg
2 Mikroelektronik Anwendungszentrum (MAZ) Hamburg GmbH, 21079 Hamburg
3 Institut f¨ur Informatik, University of Freiburg, 79085 Freiburg
Germany
Abstract. In this paper an effective technique of camera calibration
based on a 3D­point­grid is presented. The properties of structured space
points, defined as 3D­point­grid, and their relations under perspective
transformation are analyzed. Upon the correspondence between these
3D­points and their image points a calibration is made not only to com­
pute the parameters of camera model by a linear method simply from
the independent points in 3D­point­grid but also to verify, modify and
regulate extrinsic parameters of the orientation and position simultane­
ously from the structure constraint implied in these points. On the basis
of the verification, modification and regulation the intrinsic parameters
of camera can be computed with more objective criteria. Experimental
results show the necessity and advantage of the verification and modi­
fication of the orientation and position parameters, and prove that our
calibration technique can improve the accuracy of both extrinsic and

Source: Albert-Ludwigs-Universität Freiburg, Institut für Informatik,, Lehrstuhls für Mustererkennung und Bildverarbeitung

Collections: Computer Technologies and Information Sciences