[argyllcms] Re: RGB Printer Profiling / Issues with Blacks and Shadows

It is clear to me that the iMatch profile black point is mapped to a
"relative" black point, otherwise it would not reach all the way to the
bottom as shown?

Roger

-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of Andreas Hebeisen
Sent: August-06-11 6:54 AM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: RGB Printer Profiling / Issues with Blacks and
Shadows


Hi Klaus

Thanks for jumping in on this!

On 06.08.2011, at 12:18, Klaus Karcher wrote:
> If the modified argyll profile produces the blacks you expect and the
modified i1Match profile produces dull blacks, you can assume that Aperture
has an issue with the black point tag.

Sadly, the problem didn't go away. The behavior of the modified profiles is
the same.
But thanks to your contribution, we can rule this one out.

Did you, or someone else, ever looked at those two profiles on a LAB-plot?
Attached, you find the Lab-Plot from Apples ColorSync.
The wireframe gamut ist the eyeOne-iMatch profile, the smaller, colored one
is ArgyllCms. Even here, the latter doesn't seem to reach black at the
bottom of the give space. Coincidence?

Andreas

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