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Digital BW, The Print

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Message

[Digital BW] Re: RGB Convert to Grayscale

2003-11-28 by Mark Hahn

my method is to:

action:
create Curves adjustment layer (I)
create Channel Mixer layer (with a generic mix)
create final Curves adjustment layer (may be deleted if not used)

then I tweak the curve I RGB channel for overall contrast and Levels-
type adjust and then the individual channels to get differential 
channel mixing (the Channel Mixer is simply a linear combination and 
this gives you much more subtle and differential control).  The final 
Curve adjust is sometimes easier for overall adjustment than trying 
to do everything in the first one, especially if you did a lot of 
detailed RGB curve tweaks and just want to add an overal smooth s-
cuve for gamma control etc.  The final curve adjust also gives you a 
super easy way to "tone" your image... just tweak the individual 
channels.  I have tried the HSV method, but can visualize RGB much 
better.  Also, it is easier to actually look at your RGB channels and 
see what you are working with since that is a direct PS color working 
space and HSV technically is not (they give you the adjustments, but 
not the actual channels).

mark 

...
> > This sounds much like a method I use (I think it was posted here 
last
> > year but I don't remember who - sorry I can't give proper credit):
> >
> > 1) Add Hue/Sat layer but don't change anything yet.
> > 2) Add Chan/Mix layer and do the usual things with it.
> > 3) Back to Hue/Sat layer: move the Hue slider to get the effect 
you
> > want (can give red or yellow filter look, etc).
> > 4) Flatten
> > 5) Convert to grayscale mode
...

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