Main
Datasets

	RecogRate	ErrorRate	RelativeError	Timings(sec)
MultiPIE	Link	Selected	Link	Link
Caltech_101	Link	Link	Link	Link
Sampled_MNIST	Link	Link	Link	Link

LDA

	Global	Class	Train	Test	Line
Offline	40.1 ± 1.3	35.2 ± 1.2	Impractical	N/A	N/A
Online	40.1 ± 1.3	35.2 ± 1.2	37.8 ± 1.1	34.7 ± 1.4	Impractical
Interp	40.1 ± 1.3	35.2 ± 1.2	35.7 ± 1.2	35.7 ± 1.1	35.6 ± 1.2

Metric Learning

	Global	Class	Train	Test	Line
Offline	40.8 ± 1.9	39.8 ± 1.8	Impractical	N/A	N/A
Online	40.8 ± 1.9	39.8 ± 1.8	Impractical	38.8 ± 1.5	Impractical
Interp	40.8 ± 1.9	39.8 ± 1.8	33.8 ± 1.5	33.9 ± 1.5	33.9 ± 1.6

Hybrid (Global LDA + Local Metric)

	Global	Class	Train	Test	Line
Offline	40.8 ± 1.9	34.4 ± 1.4	Impractical	N/A	N/A
Online	40.8 ± 1.9	34.4 ± 1.4	31.1 ± 1.2	29.9 ± 1.4	Impractical
Interp	40.8 ± 1.9	34.4 ± 1.4	34.6 ± 1.5	34.6 ± 1.5	34.6 ± 1.5