Detection of Fatigue Microcrack Using Eddy Current Pulsed Thermography

Table 5

The results of the quantitative analysis with SNR in dB.

	SNR (with machined notch in dB)				SNR (unnotched in dB)
	1	2	3	4	1	2	3	4
Original	2.14	3.88	3.49	3.10	X	2.26	-0.27	4.02
PCA	2.64	4.54	6.34	4.75	X	2.56	2.26	5.05
Tucker	7.18	8.18	7.65	7.30	X	2.80	1.52	7.67