Patent ID: 6707486
Filing Date: 2004-03-16
Classification: H04N

Abstract:
A method of detecting motion in a video surveillance system, comprising:receiving a plurality of video image frames from a video camera that is positioned to image an object; comparing a sequence of video image frames to generate a map of differences between sequential video image frames and based on the map of differences, generating a plurality of relative location points for at least one object, wherein each relative location point is based on a center of mass of an individual object; generating at least one direction vector from the plurality of relative location points, wherein each direction vector indicates a velocity and direction of at least one object; comparing at least one direction vector with a user defined direction; determining a horizontal and a vertical component of at least one direction vector; and generating a signal indicative of movement of at least one object if at least one direction vector matches at least one predetermined velocity and at least one predetermined direction wherein the user defined direction is horizontal, wherein the signal is generated if the horizontal component is greater or equal to the vertical component.