Page 151 - Introduction to Statistical Pattern Recognition
P. 151

4  Parametric Classifiers                                     133






























                                    Fig. 4-7  An example of linear mapping.

                         The expected values and variances of h (X) are

                               q; = E(h(X)lw;} = VTE(Xlw;} + V(] = VTM; + v,  ,   (4.19)









                         Let f  (7-1 I ,q2,07,0i) be  any criterion to be  minimized  or maximized for
                    determining the optimum  V and  v,.  Then, the derivatives off with  respect to
                     V and v,  are

                                                                                (4.21)



                                                                                (4.22)


                    On the other hand, from (4.19) and (4.20)
   146   147   148   149   150   151   152   153   154   155   156