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Masking moving objects on stationary background

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jipi lef
Masking moving objects on stationary background
on Nov 3, 2012 at 8:06:13 pm

Hello,

I need to mask moving foreground subjects and I was wondering if any techniques or plug-in existed to achieve that, or at least help, without resorting to manual rotoscoping. The camera is stationary, so in short I'm searching for something that can detect "moving" pixels with no luck so far...


Thanks in advance!


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mathew fuller
Re: Masking moving objects on stationary background
on Nov 4, 2012 at 12:37:48 am

Mocha for after fx.

My Work:
http://www.morecompletefx.com


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Erik Waluska
Re: Masking moving objects on stationary background
on Nov 4, 2012 at 2:45:53 am

If you have a clean plate of the background you can probably use the difference matte effect. Kevin Mcauliffe has a tutorial on the difference matte here on the cow.


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Tudor "Ted" Jelescu
Re: Masking moving objects on stationary background
on Nov 4, 2012 at 7:25:15 am

The Rotobrush is not exactly rotoscoping but it does require a certain amount of tweaking. The difference matte mentioned before is a good way to go- if you do not have a "clean plate" then you can build one from various frames that combined can create a background without any figures in the foreground.

Tudor "Ted" Jelescu
Senior VFX Artist


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Vishesh Arora
Re: Masking moving objects on stationary background
on Nov 4, 2012 at 8:57:54 am

Jipi

Here is a link to learn Rotobursh Technique:

http://www.video2brain.com/en/lessons/isolating-a-subject-with-roto-brush

And there are many out there on Youtube.

Rotobrush is good in isolating a subject as Ted has suggested. Just a little bit of tweaking will give you fast and accurate result.

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

Demo Reel(3D):







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jipi lef
Re: Masking moving objects on stationary background
on Nov 4, 2012 at 1:32:58 pm

Thanks for the answers, I'm going to check it out


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