Ali Ghodsi Jiayuan Huang Dale Schuurmans Transformation-Invariant Embedding for Image Analysis. 519-530 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3024&spage=519 2004 conf/eccv/2004-4 ECCV (4) db/conf/eccv/eccv2004-4.html#GhodsiHS04