Quanta Magazine August 30, 2018
Researchers at MIT showed that the changing light on the wall of a room, filmed with nothing fancier than an iPhone, can be processed to reveal the scene outside the window. In 2014 a man said “Mary had a little lamb…” an empty chip bag. They filmed the motion of the chip bag and reconstructed audio. DARPA’s REVEAL program (Revolutionary Enhancement of Visibility by Exploiting Active Light-fields) was partly inspired by these findings. REVEAL has been making non-line-of-sight imaging ever more powerful and practical… read more. Open Access TECHNICAL ARTICLE 1 , TECHNICAL ARTICLE 2
A shadow’s edge can reveal hidden objects.