Sparsity Preserving Discriminant Projections with Applications to Face Recognition

Table 6

Time (s) for acquiring the discriminant vectors of SPP and SPDP on CMU PIE ( is the training sample size).

Methods
SPP	40.9725	67.6737	104.9756	178.6327
SPDP	0.2736	0.8135	1.9037	2.7218