Assertion: optical keyboard | /r/CapableOf | analyse finger motions
Facets:
Source sentences:
text: It optically detects and analyses human hand and finger motions and interprets them as operations on a physically non-existent input device like a surface having painted keys.
text: It optically detects and analyses human hand and finger motions and interprets them as operations on a physically non-existent input device like a surface with painted or projected keys.