The paper presents whack gestures – a class of mobile input techniques whose actions demand little exactness and attention from the user.
The paper gives examples of such gestures where whacking the phone signals the beginning/ending of a gesture and another whacking/wiggling/no_actions frames the gesture. The implementation used the accelerometer and, as proved in an experiment, yields little false positives.
Key Points & Take-Away
- Whack Gestures, an inexact and inattentive interaction technique… without the use of fine motor skills or detailed visual attention.
- “While this clearly does not cover all of the ways such devices are carried, it does provide an initial feasibility test for the approach.” -> very nice way to say “hey, this is limited; but it’s still reasonable as first steps”.
- What I don’t get in the experiment is the participants’ 2-hour of walking out with the device before told to perform the gesture (and only 3 times). Why need to collect ‘baseline data’ given that the system is already implemented and in place? Why separate the ‘walking out’ and the performing of the gestures – these gestures should have been performed during walking out in ‘normal routine’, right?
- “reduce the false positive rate by three orders of magnitude” – a more convincing way of saying how much your work improves the previous.