[argyllcms] Re: ArgyllCMS: shadow details and blue color issues. What I'm doing incorrectly?

  • From: "Xavi" <aruiz@xxxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Mon, 8 Oct 2012 16:33:42 +0200

Hello Graeme Hill.

Thank you for your reply.

Here you can see a print screen of the commented issues:


I started with a chart of 210 patches. When I observed the results I
increased the number of patches to try to solve it. I have tested with 210,
396, 1188 and 1980 patches.

On all this cases occurs that the relative colorimetric  loose information
on shadow details and has a black less deeper (could be more neutral)than
the perceptual intent. But the perceptual intent has a muted or washed blue
color and a magenta cast, specially appreciable on yellows and skin colors
(appreciable on softproof or on prints illuminated a 500cd/m2, 5000k and
CRI>93) but a lot of shadow details and a black a lot more deeper.

I don't know if using  perceptual intent I see a magenta color cast beacause
I have not neutralized the gray axis. I don't know if it is possible to do
with Argyll v1.4.0. If you confirm that is possible I will investigate this
case to obtain more natural colors using perceptual intent.

I attach you  the ti3 files corresponding to the 210, 396, 1188 and 1980
patches. Could be that with a greather number of ti3 files you can discover,
more easily, where is the problem.

Also I attach you a ICM profile (from the chart of 396patches) if you want
to softproof with them.

I hope you can discover what is happening or something that I can try to do.

Please, if you need that I do something or you need other files, don't
hesitate to request them to me.

Thank you very much.

Best Regards,

-----Mensaje original-----
De: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
En nombre de Graeme Gill
Enviado el: lunes, 08 de octubre de 2012 5:29
Para: argyllcms@xxxxxxxxxxxxx
Asunto: [argyllcms] Re: ArgyllCMS: shadow details and blue color issues.
What I'm doing incorrectly?

Xavi wrote:
> *colprof -v -qu -iD50 -o 1931_2 -S AdobeRGB1998.icc -cmt -dpp 
> -D"Description Profile" -O"NameProfile.icm" 
> Argyllv140_396parxes48Gris3Blanc

        please email me (or post a link to) a .ti3 file that will illustrate
the problem.

        Graeme Gill.

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