How do I Key out black?

AM
Posted By
Aric_Mannion
Dec 15, 2008
Views
2280
Replies
5
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Closed
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Rene_Garneau
Dec 15, 2008
Go in the Channel palette and Command+click on the top channel, Inverse the selection and hit delete. But before deleting make sure the layer your black is on is a layer that’s not locked, like a background layer.
AM
Aric_Mannion
Dec 15, 2008
That deletes the grays as well as the blacks. Is there a way I can key, or "mask" the black so that I can feather the edge or have more edge control/tolerance?
I’d like to use the same method on green screen stuff to. I thought green screen was originally a photo technique, but I can only do it in after effects.
P
PECourtejoie
Dec 15, 2008
Instead of hitting delete, do not invert, and create a layer mask!
AM
Aric_Mannion
Dec 15, 2008
My image is black white and gray. It looks like his method doesn’t work on the grays, only whites? I need something that will let me choose a color, and then make that color transparent with a reasonable amount of controls such as tolerance, and feathered edges.
If someone gave you a photograph with a chroma green background, and asked you to key out the green, how would you do it? There must be some way to key out a color that I don’t want, without taking away other parts of the picture in the process.
DK
Doug_Katz
Dec 15, 2008
May sound silly, but how uniformly black is the black? If relatively so, then Color Range or even the Magic Wand can select narrow ranges of a single color. Use it in a channel for even more surgical control.

Or am I totally missing your objective?

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