A novel method was proposed,which extracted video object' s track and analyzed video object's be-havior.Firstly,this method tracked the video object based on motion history image,and obtained the co-ordinate-based track sequence and orientation-based track sequence of the video object.Then the pro-posed hidden markov model(HMM)based algorithm was used to analyze the behavior of video object withthe track sequence as input.Experimental results on traffic object show that this method can achieve thestatistics of a mass of traffic objects'behavior efficiently,can acquire the reasonable velocity behaviorcurve of traffic object,and can recognize traffic object's various behaviors accurately.It provides a basefor further research on video obiect behavior.
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