Assessment of stereo camera calibration techniques for a portable mobile mapping system. Issue 3 (1st June 2013)

• Record Type: Journal Article
• Authors: Brogan, Michael; McLoughlin, Simon; Deegan, Catherine
• Is Part Of: IET computer vision. Volume 7:Issue 3(2013)
• Page Start: 209
• Page End: 217
• Publication Date: 2013-06-01
• Subjects: calibration -- cameras -- geography -- Global Positioning System -- inertial navigation -- mobile computing -- roads -- stereo image processing; stereo camera calibration -- portable mobile mapping system -- MMS -- geo-reference road markings -- Global Positioning System -- inertial navigation system -- global coordinates -- portable system; Computer vision -- Periodicals; Pattern recognition systems -- Periodicals; 006.37
• DOI: 10.1049/iet-cvi.2012.0085
• Languages: English
• ISSNs: 1751-9632

Abstract

Abstract : Mobile mapping systems that detect and geo‐reference road markings almost always consist of a stereo camera system integrated with a global positioning system/inertial navigation system. The data acquired by this navigational system allows features detected in the stereo images to be assigned global co‐ordinates. An essential step in this process is the calibration of the cameras, as it relates the pose of the two cameras to each other and a world co‐ordinate system. In Europe, road markings must be evaluated from a 35 m range, so the cameras are required to have a wide field of view. Traditional calibration methods supposedly require a calibration object that would fill most of the calibration images. This large field of view would require a calibration object of substantial size that would be impractical for the purposes of this portable system. This study explores the theory of camera calibration and then details two camera calibration techniques (using portable 3D and 2D calibration objects). The accuracy of these methods is then evaluated using a ground‐truth experiment.