Re: GMGColor .mx4 to icc profiles
Re: GMGColor .mx4 to icc profiles
- Subject: Re: GMGColor .mx4 to icc profiles
- From: Thomas Holm/pixl <email@hidden>
- Date: Wed, 2 Jan 2008 09:40:14 +0100
On 02/01/2008, at 01.02, Matthew Larmour wrote:
Hi Thomas,
Could you elaborate how you go about doing this? What sort of a
"curve tool" do you use for this?
Sure:
In GMG's PRofile Editor make a new MX4, import either en ICC profile
or LAB measurement data, select calculate with target (It doesn't
matter much which gamut/printer select but it is preferable if it is
well behaved (no inherent kinks)- such as Fogra 39 dataset.
Then in 4-D color view, under Tools open Graphic View (curve tool).
You are now looking at the cyan axis (all cyan grid points). by
clicking on the right arrow under Magenta you can scroll through all
combinations of CMY with no Black (when you hit 100% and keep going
Yellow will automatically increase by 1 increment). After doing this
select 20% K and repeat the procedure and then 40% K, repeat etc and
then finish off with the Key axis.
What you are looking for, in a few words, is weird curves.
IE: If on some greenish color you have a smooth yellow curve, but on
the next increment have one which at one spot is negative (say 50% has
a lower value then 40%) but on the next increment it is fine again,
you almost certainly have a problem.
With some experience you can figure out whether you will need to
smooth, or rather, how much. I find that even measurement data for
inkjet printers which are pre linearized will benefit from some
smoothing.
Hope this helps.
Med venlig hilsen
Thomas Holm / Pixl Aps
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