[argyllcms] Re: RGB Printer Profiling / Issues with Blacks and Shadows
- From: Andreas Hebeisen <fotografie@xxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 6 Aug 2011 12:15:54 +0200
2011/8/6 Graeme Gill <graeme@xxxxxxxxxxxxx>:
> There is a degree of ambiguity in V2 specifications regarding white point, and
> the ICC meddled with the black point treatment in the PCS, leading to even
> more
> variations in profile behaviour.
> Changes in the nature of the measurement mode (contact vs. telescopic) in V4
> have thrown in additional complications to muddy the waters.
OK. Thanks.
>
> I have no idea though why
> the profile maker profile should be any different though.
Yep.
But unfortunately there is a difference and it's not a little one.
I don't see any problems with profiles from eyeOne iMatch 3 or even the
profiles EPSON included in the driver package for their papers. But since I'd
like to create my own profiles for non-EPSON papers, that doesn't help much.
One last question: When I look at the header data of the profiles (iccdump), I
see some differences:
1) "Rndrng Intnt" is "Relative Colorimetric" in ArgyllCMS-profiles and
"Perceptual" in the other profiles I've mentioned above.
2) "Version" is "2.2.0" in ArgyllCMS-profiles but "2.4.0" in the other profiles.
Maybe those fields aren't just handled as metadata and do have an effect in how
the CMM behaves with a given profile? If yes: Is there a way to modify those
fields in ArgyllCMS?
Thanks again.
Andreas
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