fall scenarios
To be able to correctly recognize a fall, we need to define the cases in which we speak of a fall that should be recognized and which situations on the other hand should be ignored even though they resemble a fall scenario.
In the following table, defined by Noury et al. in [1], positive and negative scenarios are defined:
Category |
Description |
Outcome |
Video |
Backward fall |
Ending sitting |
Positive |
|
Ending lying |
Positive |
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Ending in lateral position |
Positive |
||
With recovery |
Negative |
||
Forward fall |
Ending on the knees |
Positive (but we think this could be negative) |
|
With forward arm protection |
Positive |
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Ending lying flat |
Positive |
||
With rotation, ending in lateral position (left or right) |
Positive |
||
With recovery |
Negative |
||
Lateral fall (to the left or right) |
Ending lying |
Positive |
|
With recovery |
Negative |
||
Syncope |
Vertical slipping against a wall finishing in sitting position |
Negative (we think this should be positive - initiate the alarm) |
|
Neutral |
To sit down on a chair, then to stand up |
Negative |
|
To lie down on the bed, then to stand up |
Negative |
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Walking |
Negative |
||
To bend down, pick something up, then to rise up |
Negative |
||
To cough or sneeze |
Negative |
[1] Noury N, Fleury A, Rumeau P, Bourke AK, Laighin GO, Rialle V, Lundy JE, Fall detection - principles and methods, Conf Proc IEEE Eng Med Biol Soc. 2007:1663-6.
All scenes are available here.