@article{ref1,
title="Towards automatic near real-time traffic monitoring with an airborne wide angle camera system",
journal="European transport research review",
year="2009",
author="Rosenbaum, Dominik and Kurz, Franz and Thomas, Ulrike and Suri, Sonia and Reinartz, Peter",
volume="1",
number="1",
pages="11-21",
abstract="Purpose  Large area traffic monitoring with high spatial and temporal resolution is a challenge that cannot be served by today available static infrastructure. Therefore, we present an automatic near real-time traffic monitoring approach using data of an airborne digital camera system with a frame rate of up to 3 fps.  Methods  By performing direct georeferencing on the obtained aerial images with the use of GPS/IMU data we are able to conduct near real-time traffic data extraction. The traffic processor consists mainly of three steps which are road extraction supported by a priori knowledge of road axes obtained from a road database, vehicle detection by edge extraction, and vehicle tracking based on normalized cross correlation.  Results  Traffic data is obtained with a correctness of up to 79% at a completeness of 68%.  Conclusions  With this system we are able to perform area-wide traffic monitoring with high actuality independent from any stationed infrastructure which makes the system well suited for deployments on demand in case of disasters and mass events.<p />",
language="",
issn="1867-0717",
doi="10.1007/s12544-008-0002-1",
url="http://dx.doi.org/10.1007/s12544-008-0002-1"
}