Guoqiang Fei Yonghuai Liu Baogang Wei Longzhuang Li Discontinuity-Based Simplification of Free Form Surface From a Range Image. 13-16 2006 conf/icpr/2006 ICPR (4) http://doi.ieeecomputersociety.org/10.1109/ICPR.2006.454 db/conf/icpr/icpr2006-4.html#FeiLWL06