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Sensors 2014, 14(9), 16630-16650; https://doi.org/10.3390/s140916630

Sequential and Automatic Image-Sequence Registration of Road Areas Monitored from a Hovering Helicopter

1
Fugro Intersite B.V., Fugro, Dillenburgsingel 69, 2263 HW Leidschendam, The Netherlands
2
Department of Geoscience and Remote Sensing, Delft University of Technology, P.O. Box 5048,2600 GA Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 22 June 2014 / Revised: 14 August 2014 / Accepted: 1 September 2014 / Published: 5 September 2014
(This article belongs to the Special Issue Positioning and Tracking Sensors and Technologies in Road Transport)
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Abstract

In this paper, we propose an automatic and sequential method for the registration of an image sequence of a road area without ignoring scene-induced motion. This method contributes to a larger work, aiming at vehicle tracking. A typical image sequence is recorded from a helicopter hovering above the freeway. The demand for automation is inevitable due to the large number of images and continuous changes in the traffic situation and weather conditions. A framework is designed and implemented for this purpose. The registration errors are removed in a sequential way based on two homography assumptions. First, an approximate registration is obtained, which is efficiently refined in a second step, using a restricted search area. The results of the stabilization framework are demonstrated on an image sequence consisting of 1500 images and show that our method allows a registration between arbitrary images in the sequence with a geometric error of zero in pixel accuracy. View Full-Text
Keywords: image sequence stabilization;registration;sequential error removal;homography image sequence stabilization;registration;sequential error removal;homography
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Nejadasl, F.K.; Lindenbergh, R. Sequential and Automatic Image-Sequence Registration of Road Areas Monitored from a Hovering Helicopter. Sensors 2014, 14, 16630-16650.

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