[argyllcms] Re: Compensating for dark paper colour
- From: Idea Digital Imaging <qcore@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 24 Feb 2010 11:34:18 +0000
On 23 Feb 2010, at 20:52, Graeme Gill wrote:
Idea Digital Imaging wrote:
Is there any way I can use Argyll to compensate for this dark paper
colour while making the device link conversions?
Not currently. I do have an experimental tool for such a thing, but
(unless
you are running on a Mac or are prepared to send me files to run
though
it) I probably can't help you at the moment, since I'm away from
home. That
approach requires a .ti3 from a similar printer + whatever details
you have
about the actual print conditions (ie. so if it was a press setup
for Fogra39
but different stock was being used, the stock measurement, or even a
test strip
measurement for printing on the stock.)
I am running both PPC and Intel Macs if you want me to test anything
Graeme.
As usual with this kind of project, the printer is in another part of
the world and all I've got to work with is the paper sample in the
form of a bound dummy of a book (so I can't do much with it) and an
assurance that the printer is set up for FOGRA39.
And a deadline of yesterday of course :(
I was thinking of creating an ECI Visual target with the paper colour
multiplied through it in Photoshop and then running the result through
the spectro -- but then thought it'd be a waste of time being as it
would take longer and be no more accurate than batch processing the
images in Photoshop with curve applied to lift the half and quarter
tones.
Not ideal, but as the paper was near neutral it was the fastest fix.
Be nice to have a tool that would compensate for coloured papers that
you'd never be likely to get target data for though.
Regards
--
Martin Orpen
Idea Digital Imaging Ltd
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