Yang Yang Satoshi Fujita Sayaka Kamei A Shape Recognition Scheme for Wireless Sensor Networks Based on a Distance Field Method. 350-361 2009 ICA3PP http://dx.doi.org/10.1007/978-3-642-03095-6_34 conf/ica3pp/2009 db/conf/ica3pp/ica3pp2009.html#YangFK09