ADOBE AFTER EFFECTS: Forum Expressions Tutorials Creative Cloud

Fixing a white background

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Eric Nicastro
Fixing a white background
on Nov 27, 2012 at 2:43:55 pm

I have these videos that were shot on a white background, however, the background has some wrinkles in it. I've done my best to remove some of the worst wrinkles with a layer mask but I just can't remove those background wrinkles that are close to the talent. I've uploaded a screenshot to illustrate what I'm up against.

<a href="http://images.creativecow.net/107296/sequence09.still001.jpg"><img src="//i1.creativecow.net/u/107296/sequence09.still001.jpg" border="0" /></a>

I know the correct way to have shot is would have been to shoot on a greenscreen then key in the white background. Unfortunately, that's not really an option at this point. So please, no need to point out what I did wrong.

I've tried many different effects and techniques to remove it but none have worked that well. I've done motion tracking with a mask attached to a separate layer but that did not work. He moves his arms too much and the track point keeps moving from the spot I marked (I've tried a dozen or so different points to track from but they all keep doing that). I've tried the roto brush but that only works for about 45 frames. After which it looses the outline around my subject. And my layer mask is feathered as far as much as I can but unfortunately, he does sway a bit and doesn't stand perfectly still.

I would much rather reshoot this on a green screen, but the client is not a big fan of reshooting right now. Oh and I should mention, there are eight of these videos ranging from 15-28 minutes in length. Frame by frame tracking would not be an option.


Return to posts index

John Cuevas
Re: Fixing a white background
on Nov 27, 2012 at 2:57:17 pm

Here's the image(wasn't embedded correctly

http://images.creativecow.net/107296/sequence09.still001.jpg

Johnny Cuevas, Editor
Thinkck.com

"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.


Return to posts index

Dave LaRonde
Re: Fixing a white background
on Nov 27, 2012 at 3:10:36 pm

Rotobrush? The edges look good enough....

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


Return to posts index


Tudor "Ted" Jelescu
Re: Fixing a white background
on Nov 27, 2012 at 3:33:55 pm

Here's a screen shot of the setup I thought of:



There's a Color Range Key, a Matte Chocker and a duplicate layer with a garbage matte. One way to get good edges in this situation is to create the impression of a white spill/glow on the subject. It will hide the imperfections- that is if the client approves this look.

Tudor "Ted" Jelescu
Senior VFX Artist


Return to posts index

Vishesh Arora
Re: Fixing a white background
on Nov 27, 2012 at 4:08:20 pm

Eric

Once you will get the outline of actor correctly then you can use Auto Trace option for creating the garbage map. It will consume a little bit time though.

Here is a tutorial for this:

http://library.creativecow.net/articles/rabinowitz_aharon/junk_mattes.php

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

Demo Reel(3D):







Return to posts index

Vishesh Arora
Re: Fixing a white background
on Nov 27, 2012 at 4:17:57 pm

Eric

Here is another tutorial to create Garbage matte without auto tracing the footage.



http://www.videocopilot.net/tutorials/advanced_car_hit/

Vishesh Arora
3D and Motion Graphics Artist
Films Rajendra

Blog:
http://digieffects.wordpress.com

Demo Reel(3D):







Return to posts index


Eric Nicastro
Re: Fixing a white background
on Nov 27, 2012 at 4:39:07 pm

Wow Ted, that looks great! I'll work with those effects tonight. I can't tell you how much better that looks.


Return to posts index

Dave LaRonde
Re: Fixing a white background
on Nov 27, 2012 at 6:36:38 pm

...and since there's often one more way to skin a cat in AE, here's the same shot using Rotobrush and the Matte Choker. It's used as an alpha inverted matte for the original footage.

We can't tell how much the guy moves, so Rotobrush could be a crap shoot.


By recognizing the outcome could have been easier to achieve on a blue / green screen, you're one step ahead of many other people. But watch out for that spill!

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2017 CreativeCOW.net All Rights Reserved
[TOP]