478482.fig.002a
(a)
478482.fig.002b
(b)
478482.fig.002c
(c)
478482.fig.002d
(d)
Figure 2: (a) shows the distribution of the randomly selected face patterns in a 2D PCA-based subspace. (b), (c), and (d) show the SVDD training results using , , and , respectively. The white curves are the SVDD decision boundaries. The blue crosses with white circles denote the UBSVs, while the blue crosses with red circles in the upper-right subfigure are BSVs. The penalty weight is set as 0.3 in all the experiments.