RE: Iterative profile corrections
RE: Iterative profile corrections
- Subject: RE: Iterative profile corrections
- From: "Alexey Gribunin" <email@hidden>
- Date: Tue, 3 Dec 2002 10:41:24 +0300
Hello James!
In my opinion, you are on wrong way. If you are trying to correct
ProfileMaker calculation errors, you should not print and measure second
time. You can obtain profile errors by such way: conver 'i1 RGB 1.5 ref'
txt-file in ColorLab from printer RGB profile to Lab (Filter->ICC->LogoSync
or ColorSync) with Abs and then compare this Lab datas with measured.
Also you can measure 'i1 RGB 1.5 ref' once in spectrum and then ColorLab can
convert spectrum to Lab for you (Use ColorLab 2.77, Filter->Conversion->CIE
Colors).
And finally - I think that colorimatrical accuracy and visual accuracy are
quite different things (if your light source other than D50). On HP 10ps,
for example, if you'll get colorimatrical accuracy, visual one will be quite
bad (under daylight).
I think that visual gray balance accuracy is more considerable than
colorimetrical accuracy. There are greate tools in GretagMacbeth
ProfileEditor to achieve visual gray balance accuracy either numberically or
by visual evaluation/correction.
Best regards,
Alexey Gribunin, UNIT Copier, Moscow, Russia.
>
>I am trying to complete my workflow for performing iterative profile
>
>corrections, and am unsure how to proceed. Below, is the direction I have
>
>taken to get to where I am now, and I would greatly appreciate it
>
>if anyone
>
>could help me to move forward.
>
>Does anyone have any ideas on how I can proceed? Are there folks
>
>out there
>
>doing successful iterative profile corrections, who could share
>
>their workflow
>
>with me?
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