Sung-Hyuk Cha Sargur N. Srihari Distance between Histograms of Angular Measurements and its Application to Handwritten Character Similarity. 2021-2024 2000 ICPR http://csdl.computer.org/comp/proceedings/icpr/2000/0750/02/07502021abs.htm db/conf/icpr/icpr2000-2.html#ChaS00