Google’s ‘Project Soli’ Radar Hand Tracking and How VR and AR Might Use it
Project Soli uses radar (RAdio Detection And Ranging) to detect micro-movements in your hands and fingers. The pipeline translates reflected signals from you, say, rubbing your index finger and thumb together and recognises that as a gesture or action and redirect that gesture as input to an application.
The technology has thus far been developed to enable the hardware transmitting and receiving these radio waves to fit onto a single chip, embeddable into mobile devices or any other type of hardware.
[this could be used to fine-tune a graphic image, once the broad strokes have been created using other tracking systems.]
See the full story here; http://www.roadtovr.com/googles-project-soli-radar-hand-tracking-and-how-vr-and-ar-input-might-use-it/