Re: ColorSync and printing -- Panther (1 of 2)
Re: ColorSync and printing -- Panther (1 of 2)
- Subject: Re: ColorSync and printing -- Panther (1 of 2)
- From: Chris Murphy <email@hidden>
- Date: Fri, 19 Dec 2003 16:20:14 -0700
On Dec 19, 2003, at 2:39 PM, John Zimmerer wrote:
In this particular case, I believe the "No Color Adjustment" means the
color will be matched to Generic RGB Profile.icc then left alone. This
is why choosing this mode seems to result in color similar to that
printed from Mac OS 9 -- the Generic RGB Profile.icc is very similar
to the "raw" RGB color space used in Mac OS 9. So if you pre-match
your data in an application like Photoshop, the data isn't (currently)
left alone after that -- it's actually matched to Generic RGB
Profile.icc and then not touched by the driver.
Wait a minute. Something doesn't make sense here. If I get essentially
the same thing from OS 9 and OS X with Same As Source in Photoshop and
No Color Adjustment in the driver, that tells me that the driver must
be aware of Generic RGB being used. So when No Color Adjustment is
selected, it must tell ColorSync to use Generic RGB as the destination.
Otherwise, if Generic RGB is source (and this much both you and John
Fieber have confirmed is the case), and there was something OTHER THAN
Generic RGB used as the destination - we would NOT be getting the same
output between OS 9 and OS X. If the Factory Profile or the Current
Profile from the ColorSync Utility were being used, then that would
mandate a conversion by ColorSync even in the case of No Color
Adjustment.
We've been working with Adobe and 3rd-party printer vendors on ways to
streamline this. I don't have anything to report yet, but we're
collectively making progress on making sure color is only matched once
when printing, and that driver settings get easier.
In the meantime we could really use a null option somewhere obvious so
we aren't profiling over converted profile targets, and having both
Adobe and Apple sticking their fingers everytime the Print button is
pressed. Please?
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0-201-77340-6)
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