Table 2 Features and thresholds adopted in the fall detection algorithms
Feature | Fall value | Fall description | Threshold |
|---|---|---|---|
SV | 23.45 | Fall from a chair ending lying | C sv =23 |
A V | 18.53 | Backward fall ending lying | C a v =18 |
C A | 66.33 | Forward fall with arm protection ending lying | C c a =65.5 |
VA | 4.93 | Fall from a chair ending lying | C v a =4.72 |
VA | 1.49 | Backward fall ending lying | \(C_{va}^{l_{1}}=1.48\) |
OD | 253.88 | Forward fall with arm protection ending lying | C o d =250 |
S V G | 6.02 | Backward fall ending lying | C s v g =5.9 |
S V G A | 111.21 | Backward fall ending lying | C s v g a =110 |