Scientists Uncover Invisible Motion in Video
"A 30-second video of a newborn baby shows the infant silently snoozing in its crib, his breathing barely perceptible. But when the video is run through an algorithm that can amplify both movement and color, the baby’s face blinks crimson with each tiny heartbeat."
They talk of using it to analyse small movements in bolts in heavy machinery. And putting it in a mobile phone to analyse other people's micro-expressions. Win at poker! I can't see any problems with that.