@article{oai:nagoya.repo.nii.ac.jp:00013088,
 author = {KATO, Jien and WATANABE, Toyohide and HASE, Hiroyuki},
 issue = {11},
 journal = {IEICE transactions on information and systems},
 month = {Nov},
 note = {Automatic traffic surveillance based on visual tracking techniques has been desired for many years. This paper proposes a basic highway surveillance system using an HMM-based segmentation method. The presented system meets the essential requirement of ITS: real-time running. Its another advantage is robustness to the shadows of moving objects, which have been recognized as one of main obstacles to robust car tracking. At present, using the system we can estimate velocity of vehicles with high accuracy. For acquiring metric information in the real world, the system does not require a precise calibration but only needs four point correspondences between the image plane and ground plane.},
 pages = {1767--1775},
 title = {A Highway Surveillance System Using an HMM-Based Segmentation Method},
 volume = {E85-D},
 year = {2002}
}