grayscale a layer

[ghostinzman]

how do I grayscale a layer. I had a class were they were telling us a way to remove red eye was to select the eye portion and grayscale it. This gave it a more natural look and kept any reflective pixels intact. I just can't figure out how to do it.

 

[MarcusStringer]

You can't have two different colour spaces together.
It's either grayscale or not, or "CMYK or not", RGB or not.
It can't be RGB + Gray scale.

I think they are talking about making the layer of the eye look greyscale by going to e.g. Image>adjustment>desaturate

Marcus

http://www.midlandtypesetters.com.au

 

[ghostinzman]

I think your right. I could also use an Adjustment layer correct? Or would it be best to have seperate layers and adjust from there?

 

[MarcusStringer]

Whatever rocks you boat.

What I mean by that is there are so many different way to do what you want.
Actually, there are so many different ways to do anything in Photoshop.

So There is no one correct way to do it. If it work and it's good for you then such is life.



Marcus

http://www.midlandtypesetters.com.au

 

[duncdude]

Ironically - the layers are already greyscale. Each layer, or channel to be more exact, are 8-bit. This allows 256 shades from white through to black. A 24-bit RGB image is actually 3 x 8-bit greyscale channels. A CMYK image is 32-bit, 4 x 8-bit channels. You can view the individual channels from within Photoshop. When outputting a CMYK image to an imagesetter, for example, you will end up with 4 pieces of film. They will all be black dots on transparent film - NOT colour.


Kind Regards
Duncan

 

[MarcusStringer]

Come on Duncan

Don't confuse the poor guy, You know that's not what he was talking about.


Marcus

http://www.midlandtypesetters.com.au

 

[duncdude]

Sorry! That was a bit dumb of me


Kind Regards
Duncan