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Photo Retouching "Improving" photos, post-production, correction, etc.

holes in cmyk separations

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  #11  
Old 01-11-2008, 06:50 AM
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cricket1961 cricket1961 is offline
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Re: holes in cmyk separations

Hard to tell with the jpgs provided Karin. And I don't know how far along the first image is or whether you have done very much work to it.
But the first thing, you are spot on with trying apply image. You are just using the wrong channel.
Using your RGB jpg as a admittedly crappy guide try this:
select the cyan channel and open apply image.
using CYAN as your source channel, click the invert button
set to Normal mode and start out about 13%
now click on the mask button and again select CYAN as your source channel. Do not invert it. Click ok and go back to composite view.
This will of course turn the image slight green/blue.
Now open a curves adjustment layer, and slide the cyan hilight from 0 to about 11 or until you have your original background again. No other points on the curve please.
This should fill your hole better than the magenta channel and also open the shadows a little in the hair for more detail. You can also apply image some of the black channel into the cyan about 10% if you want afterwards.

But I am just shooting from the hip because the RGB jpg is quite bad really.
Hope this helps.

Chris
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  #12  
Old 01-11-2008, 07:05 AM
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Sveltepig Sveltepig is offline
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Smile apply image

o wow, amazing
thank you soo much
I had never tried it that way
(never read anything about apply image before, was always just experimenting)

I will definitely use this
k
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  #13  
Old 01-11-2008, 07:32 AM
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cricket1961 cricket1961 is offline
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Re: holes in cmyk separations

No problem Karin.

My cmyk days were a LONG time ago, but some of my experimenting has remained in my head!

Good luck

Chris
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  #14  
Old 01-11-2008, 07:54 AM
KR1156 KR1156 is offline
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Re: holes in cmyk separations

karin, in ps, go to "window" > "arrange" > "new window for…"

that basically gives you an alternative view of the file you're working on, in your case you can observe let's say the cyan channel as you are making overall adjustments and retouching on your main file.

there is only 1 file, just an alternative view of it. it's different than duplicate image.

it's prob used most often when you're retouching fine detail at a major zoom, and also want to see how it looks at 100%. nice big screen comes in handy for this!

hope that helps.
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  #15  
Old 01-12-2008, 04:54 AM
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Re: 2 ways to convert?

Quote:
Originally Posted by karin l View Post
Or is it maybe better to just fill in the holes after the fact (once it is cmyk)?
Absolutely not. You need to take care not to create the holes in the first place.
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  #16  
Old 01-12-2008, 04:57 AM
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Re: holes in cmyk separations

I have another question for you, Karin, that I don't think anyone has raised yet - how good is your CMYK profile? I mean (ignoring the holes for a moment) are you happy with the printed reproduction of the colour on your screen?

(I'm assuming you have your screen calibrated with a reputable device.)
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