“A team of researchers from Princeton, Stanford, Rice and Southern Methodist universities devised a system that uses powerful lasers similar to a laser pointer. The beam is bounced off a visible wall and onto a hidden object behind a corner. The beam then bounces off the object and back onto the wall.
This creates an interference pattern on the wall called a speckle pattern. The image of the hidden object is encoded in this pattern, and the researchers turned to a deep learning algorithm to perform the complex computations required to reconstruct it in real time.
The researchers were able to successfully read numbers and letters not visible via a direct line of sight.”