Patent ID: 6771799
Filing Date: 2004-08-03
Classification: G06T,H04N

Abstract:
A method for detecting the foreground or background vector near a discontinuity in a vector field, characterized in that the method comprises determining whether covering or uncovering situation exists, that, at the position {right arrow over (x)}1 of the discontinuity, the method comprises the steps:calculating a first position {right arrow over (x)}a in the previous (covering) or next (uncovering) vector field by shifting {right arrow over (x)}1 over the first vector at one side of the discontinuity; calculating a second position {right arrow over (x)}b in the previous (covering) or next (uncovering) vector field by shifting {right arrow over (x)}1 over the second vector at the other side of the discontinuity; and calculating a third intermediate position between {right arrow over (x)}a and {right arrow over (x)}b, wherein the vector fetched with v{right arrow over (a)}v at the third position in the previous (covering) or next (uncovering) vector field is the background vector.