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: John Zimmerer <email@hidden>
- Date: Fri, 19 Dec 2003 13:39:06 -0800
Chris,
You're welcome.
ColorSync
Color Conversion: Standard
Profile: System Default
Driver may perform custom color correction: true
Quartz Filter: None
... then buyer beware, because we can't tell if the driver will use
the
registered profile, or if it might tinker with the color after it's
matched.
System Default means what profile? Display profile or printer profile?
That's a good question. This message is a generic way of saying we're
not sure what the driver is going to do with the color.
Almost always this message means that the driver either didn't hand up
a profile at all (even if one was registered -- remember the driver
settings in the Print dialog influence this), or that the driver
actually handed up one of the Generic system profiles as the
destination space. This message almost always means that color will
first be matched to Generic RGB Profile.icc, then handed to the driver
which might pass this color through or perform additional operations on
the data.
With the Epson SP 2200, I get the above message in the summary whether
ColorSync is selected in the Color Management window, or No Color
Adjustment. Yet I get different output using those two options.
The reason you get different output has to do with what profile the
driver actually hands the printing system, and what the driver does to
the color AFTER it receives the data.
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.
Choosing ColorSync in *most* EPSON drivers means that the corresponding
ICC device profile for the current mode (i.e., quality and paper
setting) will be used. However, the driver might ignore the registered
Current Profile and hand up the Factory Profile instead. So again, we
can't be sure what the individual driver will do, so we throw the
caution flag.
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.
JZ
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.