Alexandre Hervieu Patrick Bouthemy Jean-Pierre Le Cadre A HMM-Based Method for Recognizing Dynamic Video Contents from Trajectories. 533-536 2007 ICIP (4) http://dx.doi.org/10.1109/ICIP.2007.4380072 conf/icip/2007 db/conf/icip/icip2007-4.html#HervieuBC07