David Gavilan Ruiz Suguru Saito Masayuki Nakajima Query-by-Sketch Based Image Synthesis. 2341-2352 2008 91-D IEICE Transactions 9 http://dx.doi.org/10.1093/ietisy/e91-d.9.2341 db/journals/ieicet/ieicet91d.html#RuizSN08