Sparsity Preserving Discriminant Projections with Applications to Face Recognition

Table 5

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

Methods
SPP	1.1933	2.5641	5.1679	8.4467	13.0688	19.7787	29.4638
SPDP	0.2672	0.3526	0.5128	0.5933	0.7032	0.8158	1.2875