A method and apparatus for preparing a fine mask of a boundary on a picture of an area of interest to be separated from the remainder of the picture by: storing a digitized representation of the picture, and of a rough mask defining the approximate boundary of the area of interest; and then sequentially...http://www.google.fr/patents/US5355446?utm_source=gb-gplus-shareBrevet US5355446 - Method and apparatus for preparing picture masks
