The circle gesture is similar to the action of ‘turning a knob’. This can be associated with commands like volume up and down for the music player menu or zoom in and zoom out for browsing maps.
In this article, we have discussed the detection of simple proximity hand gestures using capacitive proximity sensors. Using these same principles, we can build more complex gestures which may involve using both hands to draw a pattern in air. The success of detection of such gestures, however, still depends on how good a sensor pattern we choose. It is important to choose a suitable pattern which allows for tolerance in hand movements while drawing gestures and yet have a clear distinction in the order in which the sensors are triggered.
About the author:
Sivaguru Noopuran ( firstname.lastname@example.org) is a Senior Product Marketing Engineer for automotive products at Cypress Semiconductor Corp., with more than seven years of experience. His primary interests include user interface solutions and product management.