Patent ID: 6834116
Filing Date: 2004-12-21
Classification: B60R,G06T

Abstract:
A method for determining the position of a moveable object within a given area, which comprises:taking a sequence of frames of a given area with a video camera and calculating a current position of an object in the given area by electronically evaluating the frames of the sequence; comparing a currently taken one of the frames with a previously stored one of the frames to produce a differential image in which a contour of the object appears only when the object moves; and calculating the position of the object based on the differential image; and when the object is located within a predetermined region; a1) calculating a current differential image; b1) extracting a current contour of the object form the current differential image; c1) after initiation, defining a first contour and using the first contour as a template, and for all further contours, incorporating the current contour into the template in a weighted manner; and d1) repetitively performing steps a1 through c1 in order.