Universität Bielefeld Electronic Collections animiertes Foto Universität Bielefeld

Access to the Document



Bowling for Calibration: An Undemanding Camera Calibration Procedure Using a Sphere

Cerri, Pietro ; Gerelli, Oscar ; Lodi Rizzini, Dario

The 5th International Conference on Computer Vision Systems, 2007
Bielefeld, 21. - 24. März 2007

Download file

Abstract:
Camera calibration is a critical problem in computer vision. This paper presents a new method for extrinsic parameters computation: images of a ball rolling on a flat plane in front of the camera are used to compute roll and pitch angles. The calibration is achieved by an iterative Inverse Perspective Mapping (IPM) process that uses an estimation on ball gradient invariant as a stop condition. The method is quick and as easy to use as throw a ball and is particularly suited to be used to quickly calibrate vision systems in unfriendly environments where a grid is not available. The algorithm correctness is demonstrated and its accuracy is computed using both computer generated and real images.


Keywords: calibration, sphere, external parameters
Institution: Faculty of Technology, Research Groups in Informatics
DDC classification: Data processing, computer science, computer systems

Suggested Citation:
Cerri, Pietro ; Gerelli, Oscar ; Lodi Rizzini, Dario  (2007)  Bowling for Calibration: An Undemanding Camera Calibration Procedure Using a Sphere. The 5th International Conference on Computer Vision Systems, 2007


URL: http://biecoll.ub.uni-bielefeld.de/volltexte/2007/99



 Questions or comments: publikationsdienste.ub@uni-bielefeld.de
 Latest update: 15 Feb 2011
 Legal Notice
OPUS-Logo     OAI compliant      BU Logo
OAI-Logo