Artificial Smile, it's a happy world, after all
Artificial Smile
The camera „Artificial Smile“ is an apparat, whose pictures show in principle only smiling people, irrespective of their former emotional state. The camera uses a pool of pictures with smiling faces, which was created beforehand, to replace the mouthes of the pictured people with smiling ones.
http://digital.udk-berlin.de/en/hauptstudium/artificial-smile