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. 2021 Oct 18;21(20):6893. doi: 10.3390/s21206893

Table 2.

Results of Case 1 and Case 2, which are both wearable types. Case 1 is a 3-sensor selection for 5 recognized activities. Case 2 is a 2-sensor selection from a virtual wearable distance sensor.

Case Recognized Activity Method Position Computation Cost Result
Case 1 Standing/
Walking/
Running/
Upstairs/
Downstairs
ID-CS Chest,
Right shoulder,
Head
175 97.38%
Dynamic
programming
Chest,
Right lower leg,
Left lower leg
455 97.62%
Random
selection
Left shoulder,
Right upper arm,
Right lower leg
175 96.09%
Empirical Waist,
Right upper leg,
Head
1 95.12%
Case 2 Heel up and down/
Squat/
Hip stretch
ID-CS Left lower leg-left and
Left upper leg-back
40 100%
Dynamic
programming
Left lower leg-left and
Left upper leg-back
60 100%
Random
selection
Right upper leg-back and
Right upper leg-front
40 100%
Empirical Left lower leg-left and
Left upper leg-right
1 98.39%