I’ve been working on implementing methods for automagically rotoscoping a video in real-time. There is no semantic knowledge in these videos though the effect is still nice. There are ways to extract the object in the temporal domain, though not in real-time. I think there are some hacks yet to be discovered…
Nice work. I'm interested in realtime roto too, even to the point of thinking of custom hardware. Drop me a line: jhoobler@gmail.com