Carlos Ramon Pantaleon Dionisio Hae Young Kim New Area Matrix-Based Affine-Invariant Shape Features and Similarity Metrics. 1725-1728 2006 conf/icmcs/2006 ICME http://doi.ieeecomputersociety.org/10.1109/ICME.2006.262883 db/conf/icmcs/icme2006.html#DionisioK06