Google is working on a "Human Presence Sensor" for Chromebooks, which could be used for face unlock or other long-awaited Chrome OS features.

Microsoft figures out how to make a nearly perfect 3D model of the human face by Todd Bishop on August 8, 2011 at 12:32 am ...

A new sensor developed at MIT can measure biological and environmental signals, and evaluate how well a face mask fits by measuring physical contact between the mask and the wearer’s face.