Table 1 Features used for activity recognition
From: In-lab versus at-home activity recognition in ambulatory subjects with incomplete spinal cord injury
Description | Total number of values |
|---|---|
Mean, absolute value of the mean | 6 |
Moments: standard deviation, skew, kurtosis | 9 |
Deviation, skew, kurtosis | 12 |
Root mean square | 3 |
Smoothed root mean square (5 pt kernel, 10 pt kernel) | 6 |
Extremes: min, max, abs min, abs max | 12 |
Histogram: includes counts for −4 to 4 z-score bins | 27 |
Fourier components: 32 samples for each axis | 96 |
Overall mean acceleration | 1 |
Cross product means: xy, xz, yz | 3 |
Abs mean of the cross products | 3 |