Has anybody investigated the US copyright status of artwork rotoscoped from copyrighted video? I already have a good understanding of US copyright law including the application of derivative works and fair use, but I would be very interested to hear:

* If you have investigated this issue specifically, perhaps in consultation with a lawyer.
* If you can refer me to any relevant precedents (even if not specifically LASER related).

Naturally I won't take your comments as legal advice, so there is no need to disclaim them.