From herlingjan
Imagine being able to remove something from live, full-motion video as it is playing. All you do is circle it with a stylus and, poof!, it’s gone. It’s the most recent research project in the area of Diminished Reality by Jan Herling and Wolfgang Broll, Ilmenau University of Technology, Department of Virtual Worlds / Digital Games, 2010.
I’m not sure where this software will be used, but combine this with hand gestures (currently you need a stylus), and it will look like magic: wave your hand over an object in a video and, when you move your hand away, it’s gone.
source popsci