Hierarchical classification and feature reduction for fast face detection with support vector machines.

Bernd Heisele Thomas Serre Sam Prentice Tomaso Poggio Hierarchical classification and feature reduction for fast face detection with support vector machines. 2007-2017 2003 36 Pattern Recognition 9 http://dx.doi.org/10.1016/S0031-3203(03)00062-1 db/journals/pr/pr36.html#HeiseleSPP03