If I am understanding your comment and the one from Nikolay, you are talking
about the ultimate output to a CMYK printer. I’m talking about a consumer
inkjet printer, in my case an Epson 3880.
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Andreas Kraushaar
Sent: Monday, July 10, 2017 2:30 PM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: Optimizing Printer Profiles
for that reason we developed FOGRA53, a print referred large gamut exchange
colour space.
https://www.fogra.org/en/fogra-research/wc-digital-printing/digital-printing-current-projects/consolidating-standardization/research-topics/large-gamut-exchange-space/a-large-gamut-exchange-space.html
It is "proofable“ and can therefore be used as a universal reference (printing
the expected), where you can actually use dE76 for the difference between proof
and reproduction (which makes no sense for Adobe98 to print comping from an
image depending mapping or a general one). So if you insist on high quality
colour reproduction (contrary to "it should be nice and I will always get the
„best“ out of it“).
regards
Andy Kraushaar
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Am 10.07.2017 um 20:09 schrieb Nikolay Pokhilchenko (Redacted sender
"nikolay_po" for DMARC) <dmarc-noreply@xxxxxxxxxxxxx
<mailto:dmarc-noreply@xxxxxxxxxxxxx> >:
There is not much sense to build universal profile with AdobeRGB1998-to-paper
mapping. For most of real images your prints will be overcompressed. The
profiler is squeezing too large source gamut into somewhere not that large
print gamut. For most of images which gamut is not reaches all the AdobeRGB1998
boundaries this compression will be too high. This was my first disappointment
almost 10 years ago. I've started my color experiments in 2006 and remember
ArgyllCMS beta 0.6...
That is why I'm proposing to store the images in large enough synthetic matrix
profile color space but printing them only with individual color mapping while
using image gamut as a source.
Currently I can't say much about best softproof profile for editing purposes.
Sure it is useless to use AdobeRGB1998 source mapped profile as an instrument
for preview gamut checking while using same space for editing. It is better to
use for preview the profile without a mapping, without of gamut compression
just to check out-of-gamut colors which will take more attention.
понедельник, 10 июля 2017г., 20:48 +03:00 от Charlie
<mailto:dmarc-noreply@xxxxxxxxxxxxx> dmarc-noreply@xxxxxxxxxxxxx:
I made a profile for Red River Aurora Art Natural matte paper. From the
.gam file:
Home-made profile:
CSPACE_WHITE "96.474872 0.592788 1.026801"
GAMUT_WHITE "96.474872 0.592788 1.026801"
CSPACE_BLACK "18.378824 0.927170 1.620395"
GAMUT_BLACK "18.378824 0.927170 1.620395"
Red River's profile:
GAMUT_CENTER "50.000000 0.000000 0.000000"
CSPACE_WHITE "96.858887 0.658193 3.065480"
GAMUT_WHITE "96.858887 0.658193 3.065480"
CSPACE_BLACK "2.839341 0.454370 0.545357"
GAMUT_BLACK "2.842807 0.454377 0.545449"
I used the ColorMunki Photo device and these commands:
targen -v -d2 -G -g51 -e8 -f638 -w -W RRAuroraNat
colprof -v -qh -SAdobeRGB1998.icc -cmt -dpp -P -DRRAuroraNat RRAuroraNat
The result has peak error 1.72, avg. error 0.34, RMS 0.4.
