A new lens-free and compact system for facial recognition scans a bust of Michelangelo’s David and reconstructs the image using less power than existing 3D-surface imaging systems.

Facial recognition machines at Miami International Airport. A Jan. 17 report from DHS found that such facial recognition systems are highly accurate in matching live faces to IDs. koiguo/Getty Images ...

The Detroit Police Department arrested three people after bad facial recognition matches, a national record. But it’s adopting new policies that even the A.C.L.U. endorses.