Mark S. Nixon Cem Direkoglu Xin U. Liu David J. Hurley On Using Physical Analogies for Feature and Shape Extraction in Computer Vision. 163-177 2008 BCS Int. Acad. Conf. http://www.bcs.org/server.php?show=ConWebDoc.22887 conf/bcs/2008 db/conf/bcs/bcs2008.html#NixonDLH08