Accelerometry-Based Classification of Human Activities Using Markov Modeling

Table 4

Classification accuracy averaged over the seven subjects available in the sit-stand-walk dataset. The values are reported as mean ± standard deviation.

Sit-stand-walk dataset
	M = 1	M = 2	M = 3	M = 4	M = 5
Without rejection of spurious data
GMM	94.1 ± 1.8	93.7 ± 4.1	94.8 ± 2.4	95.5 ± 1.9	95.8 ± 2.1
HMM (1st level)	95.2 ± 7.0	96.8 ± 3.0	98.5 ± 1.0	98.3 ± 1.1	98.1 ± 1.1
HMM (1st + 2nd level)	95.2 ± 7.0	97.4 ± 2.9	97.9 ± 2.4	97.0 ± 2.9	98.5 ± 1.0
With rejection of spurious data
GMM	94.0 ± 1.8	95.6 ± 1.5	95.8 ± 2.3	95.6 ± 1.7	95.6 ± 1.5
HMM (1st level)	99.0 ± 1.0	98.6 ± 1.0	98.8 ± 1.0	98.8 ± 1.1	98.6 ± 1.1
HMM (1st + 2nd level)	99.0 ± 1.0	98.8 ± 1.0	98.8 ± 1.0	98.7 ± 1.1	98.7 ± 1.0