Canon’s new ELPH cameras come with Sleeping Face Recognition.
That means it detects when you’re photographing a sleeping person and automatically turns off its flash, detect beam (that red light), and beeping sound.
…so you can be extra sneaky!
Canon’s New ELPH Cameras Detect Sleeping People
via Engadget; photo by Desmorider (not shot on an ELPH)
Warning: Don’t get naked and drunk and fall asleep around me.