Welding Diagnostics by Means of Particle Swarm Optimization and Feature Selection

Table 3

Spectral bands chosen by the SFFS algorithm.

Order	AISI-304	Inconel-718	Ti 6Al-4V
	Band (nm)	Band (nm)	Band (nm)
1	393.20	520.33	393.35
2	356.75	360.49	396.14
3	396.81	390.55	334.87
4	356.58	344.15	416.27
5	442.15	402.67	375.95
6	355.06	517.93	453.32
7	476.54	484.10	422.68
8	487.69	340.72	397.61
9	396.97	357.28	430.00
10	480.63	403.81	497.80