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Table 3 Degree of accuracy for different sensor combinations at all three levels of classification—without transitions

From: Development of a Human Activity Recognition System for Ballet Tasks

 

Level 1

Level 2

Level 3

Number of sensors (number of possible sensor combinations)

Accuracy score mean (range)

Best

Worst

Accuracy score mean (range)

Best

Worst

Accuracy score mean (range)

Best

Worst

5 (6)

98.2% (98–98.5%)

L shin

L thigh

R shin

R thigh Sacrum

L thigh

L shin

R thigh

Sacrum

Thoracic

81.8% (81.3–81.8%)

L shin

L thigh

R shin

R thigh

Sacrum

L shin

L thigh

R thigh

Sacrum

Thoracic

74.9% (74.1–76.3%)

L shin

L thigh

R shin

R thigh Sacrum

L shin

L thigh

R thigh

Sacrum

Thoracic

4 (15)

98.1% (97.8–98.4%)

L shin

L thigh

R shin

R thigh

L thigh

R shin

R thigh

Sacrum

81.3% (79.3–82.4%)

L shin

R shin

R thigh

Sacrum

L shin

L thigh Sacrum Thoracic

73.8% (71.8–75.1%)

L shin

R shin

R thigh

Sacrum

R shin

R thigh

Sacrum

Thoracic

3 (20)

98% (97.6–98.2%)

L shin

R thigh

Sacrum

R shin

Sacrum

Thoracic

79.5% (73.7–81.7%)

L shin

R shin

Sacrum

L shin

L thigh Thoracic

72.0% (65.2–74.5%)

L shin

R thigh

Sacrum

L shin

L thigh Thoracic

2 (15)

97.7% (97.2–98.1%)

L shin

R thigh

Sacrum

Thoracic

75.8% (69.7–80.2%)

L shin

R thigh

L shin

L thigh

68.0% (61.5–72.5%)

L shin

R thigh

L shin

Thoracic

1 (6)

97.3% (97–97.7%)

R thigh

R shin

67.1% (60.2–76.5%)

Sacrum

Thoracic

56.5% (38.0–65.3%)

Sacrum

Thoracic