Patent ID: 6741725
Filing Date: 2004-05-25
Classification: G01S,G06T,H04N

Abstract:
A method for tracking motion in a stream of images, comprising the steps of:a) selecting one or more image templates from an original image, said image templates satisfying one or more template capture criteria; b) storing said image templates; c) using a first transform model to relate said image templates to a reference model, said reference model representing said original image in a coordinate system; d) determining a current position of said image templates with respect to a current image; e) calculating a current transform model using said current positions, said current transform model defining the way in which said reference model must be changed in order to correspond to said current image; f) purging said image templates that fail one or more template retention criteria, including said image retention criteria of the current position of said image template being in agreement with said current transform; and, g) extracting new image templates from said current image, said new image templates satisfying one or more template capture criteria.