Re: Remote proofing
Re: Remote proofing
- Subject: Re: Remote proofing
- From: Henrik Holmegaard <email@hidden>
- Date: Thu, 11 Mar 2004 21:17:53 +0100
On onsdag, mar 10, 2004, at 13:20 Europe/Copenhagen, Roger Breton wrote:
would *needed* in order for PDF/X3 fully
address color color management?
Leaving aside the strategic level and looking at the tactical level, it
is not only the case that the printing industry is opposed to RGB. It
is fair to say that the photographic industry is _also_ opposed to RGB.
Now why would that be?
It is desirable to not have CMYK but to RGB in order to achieve the
most clean and crisp transparency flattening in the flattening module
of a PostScript 3 interpreter.
Therefore, when Photoshop users send content to an InDesign user, they
may send their own choice of RGB Working Space tagged content.
They may not send their own choice of CMYK Working Space tagged content
but must agree to leave the conversion to a truly late binding solution.
Therefore, only the Perceptual conversion is secure as the ICC has not
agreed on a 5th rendering intent for Relative Colorimetric with Black
Point Compensation.
This rekindles the objection users of Photoshop 1 to Photoshop 4 have
always voiced, and still voice, over Perceptual rendering in the ICC
Specification.
In this sense the LinoColor / ColorOpen implementation was always
correct in its approach to forward rendering, as it was always correct
in its Absolute Colorimetric approach to backward rendering.
But it doesn't help to state this, because every article and every book
on color management according to the ICC Specification rejects
Perceptual rendering, and thus directs the photographer to convert to
CMYK Working Space tagged content.
Most stories have two faces, and this one has, too.
So part of the challenge is to reconstitute the validity of Perceptual
rendering, which is not going to go down well with a lot of people on
the image design side, just as the printing and proofing side has
problems with proprietary systems that claim better quality but are
more properly described as non-interoperable.
Thanks,
Henrik
----------------------------------------------------
Henrik Holmegaard, Technical Writer
Tel +45 3880 0721 / +45 3881 0721
Tollosevej 69, DK-2700 Bronshoj
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