[argyllcms] Re: Wanted: Spyder 3 and ColorMunki Beta Testers

  • From: Gerhard Fuernkranz <nospam456@xxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sun, 08 Mar 2009 13:08:12 +0100

Rick Richardson wrote:
> So, 100 patches for the Xrite software.

Unless the particular device can be modeled by a well-defined and
well-known parametric model, I would not expect wonders from just 100
patches, not even if the color space is just RGB (3-dimensional), and
not at all for a 4-dimensional CMYK color space [and I also would not
expect wonders from Argyll, using just 100 patches]. For a decent,
accurate CMYK profile IMO you rather need 1000+ or better 2000+ patches,
and even then then I'd not expect perfect neutrals, unless a black
generation with a strong UCR/GRC is used. Note, even if the profile is
very accurate and the printer's repeatability is excellent, we may still
encounter e.g. metamerism issues, i.e. even if neutrals mixed from CMY
look perfect under D50 illuminant, they may still show a color cast if
illuminated by a different light source.


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