if you are doing fine art, the last thing you want is wasteful uniform
gamut compression from a generic space to printer space; you really want
adaptive gamut compression.
Edmund
On Monday, July 10, 2017, Andreas Kraushaar <andreas.kraushaar@xxxxxx>
wrote:
Hi,
the question is your use case and hence your expectation. If you want a
„sexy“ reproduction (maximini your device capabilities) you might ignore
FOGRA53.
If you use a profiled monitor and expect a colour accurate reproduction
(across different output devices)….
regards
Andy Kraushaar
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Am 10.07.2017 um 21:04 schrieb Alan Goldhammer (Redacted sender
"agoldhammer" for DMARC) <dmarc-noreply@xxxxxxxxxxxxx
<javascript:_e(%7B%7D,'cvml','dmarc-noreply@xxxxxxxxxxxxx');>>:
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
<javascript:_e(%7B%7D,'cvml','argyllcms-bounce@xxxxxxxxxxxxx');> [
mailto:argyllcms-bounce@xxxxxxxxxxxxx
<javascript:_e(%7B%7D,'cvml','argyllcms-bounce@xxxxxxxxxxxxx');>] *On
Behalf Of *Andreas Kraushaar
*Sent:* Monday, July 10, 2017 2:30 PM
*To:* argyllcms@xxxxxxxxxxxxx
<javascript:_e(%7B%7D,'cvml','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
Register for the Fogra colour management symposium 2018 !
Our quality, neutrality
------------------------------------------------
Dr.-Ing. Andreas Kraushaar
Dept. Prepress
Fogra Graphic Technology Research Association
Streitfeldstrasse 19
81673 Munich, Germany
Telefon: +49 89. 431 82 - 335
Telefax: +49 89. 431 82 - 100
E-mail: kraushaar@xxxxxxxxx
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Am 10.07.2017 um 20:09 schrieb Nikolay Pokhilchenko (Redacted sender
"nikolay_po" for DMARC) <dmarc-noreply@xxxxxxxxxxxxx
<javascript:_e(%7B%7D,'cvml','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 dmarc-noreply@
freelists.org
<javascript:_e(%7B%7D,'cvml','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.
