eulerian magnification

Seeing Beyond the Naked Eye

Eulerian magnification can see your pulse in video

A new video processing technique from a team at MIT analyzes subtle changes on the pixel level, and then magnifies those changes by adjusting the video’s time scale. As a result, invisible changes can be magnified … even a person’s pulse as it drives blood through their face!

The hope is that automated video systems (like hospital observations or security cameras) can use tools like this to decipher tiny changes. The possibilites seem endless: surveillance, lie detection, satellite imagery, animated GIFs …

Want more? Check out the full video explanation (somewhat technical).

Fun fact: Every time your heart beats, your skin flushes red with fresh blood just a tiny bit. Go ahead, take a look. If you’re reading this on a bus, stare intently at the person next to you and see if you can spot the subtle, rhythmic blush. If you don’t get immediately sprayed with Mace, then chances are you won’t ever see a thing, because the color change is so small that it’s pretty much invisible. But now, optics researchers at MIT have released an open-source program called Eulerian Video Magnification, which takes ordinary videos and magnifies those microscopic changes to show you what you’re missing. The results range from merely odd to downright terrifying.

But EVM works on more than colors; it picks up on subtle movements, too. As you can see in this video, even when you’re sitting still, the pumping action of your heart is enough to make your head jiggle like you’re sitting on an enormous speaker with the bass turned up

5 Secret Worlds Now Visible With Insane Technology


Mathematical real-time amplification of subtle changes in videos: motion, color, position.