title: Extracting compact objects using linked pyramids.
abstract: This correspondence describes a method of extracting compact regions from images using three multiresolution (``pyramid'') representations of image features. The method makes use of a gray-level pyramid in which linking of similar nodes at successive levels smooths the image into uniform regions; an edge pyramid in which linking of similarly oriented edge elements serves to delineate the boundaries of the detected regions; and a ``surroundedness'' pyramid in which pixels surrounded by edges are detected.
authors.affiliation: Center for Automation Research, University of Maryland, College Park, MD 20742; National Bureau of Standards, Washington, DC 20234.
authors.forename: T H
authors.initials: TH
authors.lastname: Hong
authors.forename: M
authors.initials: M
authors.lastname: Shneier