Re: Default and factory profiles in OSX Colorsync Utility
Re: Default and factory profiles in OSX Colorsync Utility
- Subject: Re: Default and factory profiles in OSX Colorsync Utility
- From: Chris Murphy <email@hidden>
- Date: Mon, 27 Dec 2004 12:50:29 -0700
On Dec 22, 2004, at 12:47 AM, colorcanuck wrote:
I would be very interested in any information that allows one (me) to
change the Factory Profile to a more realistic default.
That's up to the driver, I believe. So you'd probably have to learn how
to hack a driver. It might be as simple as going through the PM and
finding a plist of some sort, it might be in there as just plain text.
Has anyone else out there had devices register no information under
the ColorSync Utility? Similar situations?
Yes and they don't always get used. There are so many drivers out there
that do the wrong thing that without considerable testing, I wouldn't
trust such a workflow with a 10 foot pole. Much of ColorSync is
untrustworthy because somehow either the driver developers are reading
Apple's documentation wrong and building crappy drivers, or Apple's
documentation is the problem. Which it is, or how much of a combination
of the two possibilities, I don't know. But the end result is we have
faith based color management on Mac OS.
I'm innocently printing away under OSX 2.8 (with no rip) and I can't
help but notice that everything going out the CUPs printing pipeline
ends up in Generic RGB, so I have to convert everything to Generic
before sending it down the pipe.
Do I really have to convert everything to Generic RGB to get it
through the CUPS print pipeline?
I'm a Rip/postscript guy so please excuse my ignorance, but wasn't
this issue raised a while back. Can't seem to find it in the Archives.
RGB data going to a PostScript device remains RGB, but CSA's are
included in the PostScript stream. The CSA's are based on the source
profiles for objects in the document. There could be numerous sources,
a single source, or none. If there is no source profile defined by the
application, then the OS assumes Generic RGB. If you don't want to
convert everything to Generic RGB, your application needs to be capable
of informing the OS of something else to use.
In OS 10.2 there is no other option. In OS 10.3, you can choose to do
OS level color management instead of in-printer color management
(PostScript color management). The option is found in the ColorSync
portion of all print dialogs.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
-------------------------------------------------------------
Co-author "Real World Color Management, 2nd Edition"
Published by PeachPit Press (ISBN 0-321-26722-2)
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