Human Posture Detection Method Based on Wearable Devices

Table 3

Feature comparisons of wavelet coefficients for three motion states.

Features	Wavelet coefficients	Left turn	Stop	Right turn
Variance	a3	0.0007 ± 0.0004	5.6273e-06 ± 2.1938e-06	4.6795e-05 ± 3.9365e-05
	d3	0.0010 ± 0.0005	2.2806e-06 ± 1.1195e-06	8.2666e-05 ± 7.4132e-05
Maximum value	a3	118.7533 ± 48.8894	13.0637 ± 1.2329	23.5794 ± 19.2797
	d3	222.2225 ± 98.4360	6.9295 ± 2.5674	54.2183 ± 29.2419
Singular value	a3	1212.8528 ± 269.3678	560.9698 ± 12.5829	588.7500 ± 83.4251
	d3	1308.7037 ± 318.5597	41.6474 ± 10.4164	364.3723 ± 185.9567