If you apply fixed values in the channel mixer, you're doing the same
thing photoshop's grayscale conversion does. You're just making it more
difficult. The channel mixer is only an advantage if one varies the mix
to obtain different results.
Paul
On Oct 31, 2005, at 7:39 AM, Adam Maas wrote:
Godfrey DiGiorgi wrote:
I just tested this technique.
I took your Beast.jpg photo and used it as a test. If you do step 3
as stated, you're essentially eliminating what you did in Step
2a,b,c; there's no point to adding the HSV Adjustment Layer. I first
followed exactly what you have listed above and got the exact same
result you did, then I eliminated steps 2abc ... the result was again
bit for bit identical. All this method is doing, as listed, is
throwing away the AB channels and presenting a the Luminosity channel
as B&W.
Then I used the Channel Mixer layered method I normally use and
obtained results which I prefer. The CM layered method allows precise
balancing of the curve that translates RGB into monochrome and can
be used to emulate any B&W film's response curve you want. I
modified the green curve in a layer under the CM layer, which
rendered the foliage with more delicacy.
Godfrey
Godfrey,
Would you mind posting your workflow for this method? I'm using the
non-layer Channel Mixer method:
Open Channel Mixer
Set Monochrome
Set Red to +60
Set Green to +40
Tweak for basic tonality
Add contrast curve if necessary
and would rather like a quick into to a non-destructive method. My
experience with layers is sadly lacking, so I'm not sure where to
start when adapting this method to layers.
-Adam
