“…As a consequence of the requirement of an accurate vehicular-target initialization, the automatic tracking of an unknown number of vehicles in a complex scene becomes difficult for the existing stochastic filter-based techniques. In this context, the tracking-by-detection approach has become one of the effective solutions for initializing as well as keeping a moving object within the track ( Chien, Chan, Tseng, & Chen, 2013;Ess et al, 2009;Ess, Schindler, Leibe, & Gool, 2010;Gavrila & Munder, 2007 ). For example, a correct motion model is estimated from a set of candidate trajectories generated by the EKF-trackers of different observations by using the semantic information of the object category ( Ess et al, 2010 ).…”