Colour Replace function


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Colour Replace function
by keith chegwin on May 7, 2008 at 3:44:53 pm

Hi guys,

I have a problem. I am designing a football app and need to have 5 different color shirts with 5 different color stripes.

i have managed to tint the shirt, but how would i isolate the black (gaffer tape) on the shirt and change it to say blue.

In photoshop there is a color replace function, but is there one in after effects?

Here is my example

http://img166.imageshack.us/img166/5354/picture2vh2.png

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Re: Colour Replace function
by Dave LaRonde on May 7, 2008 at 9:43:53 pm

You can use the Change Color or Change Color To effects in AE.

But because we're talking about black, and because there will be LOTS of black in your shots, don't be surprised if you have to use two layers -- one with NO effect applied -- and animate a mask to remove all the black areas that shouldn't be blue.

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

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Re: Colour Replace function
by keith chegwin on May 8, 2008 at 8:35:29 am

thanks for the reply. . . was trying to avoid masking, I have 5 or 6 different shirt types and three different body sizes :(

If i was to do this again what colours would be best?

I thought maybe shirt white and stripes red?

Cheers

K

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Re: Colour Replace function
by Dave LaRonde on May 8, 2008 at 3:09:53 pm

[keith chegwin] "If i was to do this again what colours would be best?"

What would be BEST? Getting the various shirt types you need for everyone on the field, and shooting the footage you need.

Dave's Stock Answer #2:

When you're out on a shoot, and you say, "we'll fix this in post" without knowing PRECISELY HOW you're going to fix it in post, don't shoot it! You'll only end up shooting it over again.

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

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Re: Colour Replace function
by keith chegwin on May 8, 2008 at 3:53:54 pm

Hey dave,

I actually worked it out :) I shot white shirts on a green screen, with black gloves. I then comped on some illustrated patterns at 90% opacity, with a bit of turbulence distortion.

http://img396.imageshack.us/img396/3677/picture4mr7.png

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Re: Colour Replace function
by Dave LaRonde on May 8, 2008 at 4:30:37 pm

Oh, and here I'm thinking about real-live soccer players actually playing on a soccer field, and you need to have a photorealistic solution to change their jerseys to different colors and patterns.

Silly me.

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

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