A method of producing a depth map for use in the conversion of 2D images into stereoscopic images including the steps of: identifying at least one object within a 2D image; allocating an identifying tag to each object; allocating a depth tag to each object; and determining and defining an outline of...http://www.google.de/patents/US7054478?utm_source=gb-gplus-sharePatent US7054478 - Image conversion and encoding techniques
