[argyllcms] Re: dispwin vs xcalib loading LUT

  • From: Stefan Döhla <color@xxxxxxxxx>
  • To: Gerhard Fuernkranz <argyllcms@xxxxxxxxxxxxx>
  • Date: Tue, 2 Jan 2007 00:13:26 +0100

>> Therefore I took the system gamma into account, which is 2.2 on Win32
>> and 2.222 on Unixes

> Hi Stefan, why 2.222 on Unix?
> According to which standard/specification?

I assumed this when reading Charles Poynton's GammaFAQ and some other
UNIX resources some time ago: As gamma usually 1/0.45 and 0.45 are
assumed (1/0.45 == 2.22222). Maybe that's the reason for this "system
gamma" as I named it, that one must take into account and then the
2.20 of Win32 should be 2.222 as well.

We'd have to doublecheck with the other profile loaders again - but
I'm sure they give slightly different results and we can never find
out whether it's 2.20 or 2.22 on Win32 or Linux ...



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