(via Giant smiley measures a city’s mood | Grist)

The Fühl-o-meter (Feel-o-meter), also known as the Public Face, is an art installation, which is probably good because if it were an official civic amenity it might be a little Orwellian. But as art it’s cool! The idea is that cameras scan the faces of people passing through the city, and analyze their expressions to assess the prevailing mood. Then the Public Face reflects that mood — happy, sad, or indifferent — with its changeable mouth shape. Here’s a video of it in action in Lindau, Germany, where it appeared last year.

I can see one way to screw with this. If an angry mob began to march downtown and everyone of them was wearing the Anonymous (Guy Fawkes) mask, it would seem all was grand.