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Chroma key: spill on problematic skin tone

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Dave LaRonde
Chroma key: spill on problematic skin tone
on Dec 8, 2014 at 6:00:46 pm

Well, this is just weird.

I'm keying a 3-shot of air talent. Keylight is pulling a good key. Almost.

The person screen left: no spill visible. The person screen right: no spill visible. The person center screen: spill on either side of the face. Go figure. It appears it's just a matter of the center person's skin tone, so I need to come up with a way to remove the spill on that one person.

Here's the rub: I can't use any plugins or scripts. It's a work computer, they're not buyin' anything, nor will they allow anything extra to be installed. I'm constrained to using AE CS 5.5 alone.

I seem to recall a despill recipe that involved a couple of layers and one or more of AE's Channel effects. I'd like to take a whack at it, but I can't find it. Does anyone recall it?

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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John Cuevas
Re: Chroma key: spill on problematic skin tone
on Dec 8, 2014 at 6:09:55 pm

I like to use Hue/Saturation effect, switch to green channel desaturate, then use the sliders to isolate the spill. Andrew Kramer does the same thing in this tutorial starting around 12:00

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.


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chris brett
Re: Chroma key: spill on problematic skin tone
on Dec 8, 2014 at 6:50:09 pm

Hi Johnny

-- have you got a link / info to the tutorial please ?


-------------------chris --


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John Cuevas
Re: Chroma key: spill on problematic skin tone
on Dec 8, 2014 at 6:52:57 pm

Sorry bout that.

The Portal

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.


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chris brett
Re: Chroma key: spill on problematic skin tone
on Dec 8, 2014 at 7:07:24 pm

-- thanks Johnny -----


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Dave LaRonde
Re: Chroma key: spill on problematic skin tone
on Dec 8, 2014 at 7:45:57 pm

Hey, thanks, Johnny... I'll give it a shot.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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