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Rotoscoping or other technique to remove object from shot?

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Chris WoodRotoscoping or other technique to remove object from shot?
by on Mar 29, 2011 at 11:46:21 pm

Hello, I'm currently at Uni and for one of our group projects, I have been tasked to remove items from the shot that could not have been removed in production.

It's a period drama (exciting for Uni, I know) and we had permission to film in an old-style city hall, and a bar, and a hotel that still have 1920's decor.

But, there are some things that could not be removed or for some reason, were not covered up. Such as electrical sockets and green fire exit signs. I was wondering if anyone has any ideas on how to remove these from shot, without doing an exhausting frame-by-frame process.

What I was thinking was, bring it in to Photoshop, cover it up professionally there, bring the .png cover up back into After Effects and motion track it (would need help with this, not really done motion tracking before) If an actor or other obstruction came into shot, then I would simply mask around the object in question.


Can anyone help me out with this? Thank you very much.


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Brian CharlesRe: Rotoscoping or other technique to remove object from shot?
by on Mar 30, 2011 at 1:03:31 am

Without seeing the footage its difficult to know what techniques you'll need. If the camera moves, motion tracking is necessary.

If you have CS4 or CS5, MochaAE is your best bet. There are tutorials here:

http://www.imagineersystems.com/videos?tagFilter=%25learnmocha&sortBy=Newes...

Start with Steve Wright's Learn Mocha Chapter 1 and work through the first 6 chapters, you'll be well on your way.



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Conrad OlsonRe: Rotoscoping or other technique to remove object from shot?
by on Mar 30, 2011 at 9:18:31 am

You've pretty much got the workflow perfect there.

---

conradolson.com


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Jason MettlerRe: Rotoscoping or other technique to remove object from shot?
by on Mar 30, 2011 at 1:46:26 pm

For indepth usage of Mocha, check out all the tutorials by Mathias Mohl. He has some script plugins that make removal a lot simpler.

http://www.mamoworld.com/index.php?option=com_content&view=category&layout=...


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Michael SzalapskiRe: Rotoscoping or other technique to remove object from shot?
by on Mar 31, 2011 at 3:54:34 pm

Here's yet another tutorial specifically for object removal:
http://library.creativecow.net/articles/larsen_carl/simple25d_rig_removal.p...

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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