Lena Gorelick Meirav Galun Eitan Sharon Ronen Basri Achi Brandt Shape Representation and Classification Using the Poisson Equation. 1991-2005 2006 28 IEEE Trans. Pattern Anal. Mach. Intell. 12 http://doi.ieeecomputersociety.org/10.1109/TPAMI.2006.253 db/journals/pami/pami28.html#GorelickGSBB06