Nayer Wanas, Mahmoud R. El-Sakka, and Mohamed S. Kamel, 
                  "Multiple Classifier Hierarchical Architecture for Handwritten
                  Arabic Character Recognition", International Joint Conference
                  on Neural Networks, IJCNN'1999, Vol. 4, pp. 2834-2838, July
                  1999, Washington DC, USA. 
               
               
               
               Abstract
               
               
               
                  Combining decisions from several classifiers can be used to 
                  improve on the results of handwritten characters recognition.
                  There are different methods to combine these decisions, most
                  of which are static. In this work, we present a new
                  architecture that integrates learning into the voting scheme 
                  used to aggregate individual decisions. The focus of this work
                  is to make the decision fusion a more adaptive process. This
                  approach makes use of feature detectors responsible of
                  gathering information about the input to perform adaptive
                  decision aggregation.  The approach is tested on handwritten
                  Arabic character recognition.  The results showed an
                  improvement over any individual classifier, as well as
                  different static classifier-combining schemes.