[argyllcms] Re: FWA Compensation

  • From: Vladimir Gajic <vgajic67@xxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Tue, 14 Feb 2012 16:20:49 +0100

Hello Graeme,

I finally managed to make a few mesurements of a Heaven 42 -Paper
(it´s some kind of a ´reference´ when it comes to the FWA-content). I
performed all illumread-steps exactly as described in your
doumentation, and the results seem very logical to me. I plotted every
measurement including all intermediate steps, whitout noticing any
technical problems or false measurements. Three measurements confirmed
the consistency of the results.

My next step would be now to calculate a Heaven 42 ICC-profile using
-i<calculated.sp> -f. So far, so good. What is not quite clear to me,
ist the output profile for my proofer. There I use a paper wich has a
very small amount of FWA. Should I:

- Calculate a "default" ICC-profile using D50 or
- Calculate a ICC-profile using my calculated illuminant? Should in
that cas the -f swich be used too?

Thank´s in advance for your help.


Am 12. Februar 2012 23:14 schrieb Graeme Gill <graeme@xxxxxxxxxxxxx>:
> Vladimir Gajic wrote:
>> thank's for the hint. If I correctly understood, the -i option is to be used 
>> in spec2cie than.
> Yes,
>> In wich case the -I make sense, or does it make no sense at all when using 
>> standard types of
>> measurement devices?
> Ignore it. Assume it doesn't exist.
> [I think Gerhard added it to allow for the possibility of an instrument that 
> isn't
>  currently supported by Argyll, that has a different type of illuminant - 
> such as
>  the the spectroscan, which uses Xenon type illuminant.]
>> My question finally: does it make sense to use illumread and the fwa 
>> compensation in this
>> context, measuring the fwa content under the new lightning conditions?
> Yes, it's intended exactly for this sort of situation. You'll have to tell me 
> how successful
> it is in dealing with it :-)
> Graeme Gill.

Vladimir Gajic

Grünebergstr. 85
22763 Hamburg
Phone: +4940 18174180
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mailto: vgajic67@xxxxxxxxxxxxxx

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