Research on the Key- frame Extraction of Surveillance Video Based on Motion Velocity

People pay more attention to the change of object motion in surveillance video. Therefore, this paper proposes a key frame extraction method based on motion velocity. This method firstly extracts the moving object, next calculates the velocity of object and processes the velocity, then generates the motion velocity curve of the object, and finally extracts the key frames of the surveillance video according to the curve. Experimental results reveal that the proposed method can accurately extract the video frames whose motion changes in the process of object motion.