This article presents noticeable performances improvement of an RBF neural classifier. Based on the Mahalanobis distance, this new classifier increases relatively the recognition rate while decreasing remarkably the number of hidden layer neurons. We obtain thus a new very general RBF classifier, very simple, not requiring any adjustment parameter, and presenting an excellent ratio performances/neurons number. A comparative study of its performances is presented and illustrated by examples on real databases. We present also the recognition improvements obtained by applying this new classifier on buried tag. amounts determining his structure, i.e. the number of hidden neurons Nh and the