Hock-Ann Goh Chee-Way Chong Rosli Besar Fazly Salleh Abas Kok-Swee Sim Translation and Scale Invariants of Hahn Moments. 271-285 2009 9 Int. J. Image Graphics 2 http://dx.doi.org/10.1142/S0219467809003435 db/journals/ijig/ijig9.html#GohCBAS09