Re: ColorSync preferences
Re: ColorSync preferences
- Subject: Re: ColorSync preferences
- From: Chris Murphy <email@hidden>
- Date: Thu, 17 Jun 2004 11:24:54 -0600
On Jun 16, 2004, at 5:04 PM, Andrew Rodney wrote:
My understanding is the ColorSync utility/preferences is where user
informs
ColorSync what profile to use for untagged images. So I load a profile
I
know is going to produce ugly results, save an untagged doc to disk
and open
in Preview. Looks fine (not like Photoshop unless I assign the display
profile to the image). What gives? Looks like the assumed profile is
always
the display profile. If I open the same image (tagged), it matches
Photoshop
as one would expect.
The source profile assumed depends on the application. Sometimes it's
monitor RGB, sometimes it's Generic RGB, sometimes it's what's set in
ColorSync Utility. It's not at all consistent. The consistent thing for
Apple to do is treat untagged RGB as sRGB and use display compensation
for all applications. If the application displaying something doesn't
tell the OS that it is explicitly tagged, or /DeviceRGB (i.e.
prematched data like Adobe apps which do their own display compensation
internally), then it should be assumed to be sRGB. If the display
profile is not sRGB then ColorSync should do display compensation.
The idea of a unified interface for configuring applications was noble,
but application vendors didn't play along, and they each needed more
sophisticated and unique controls than could realistically be presented
by a universal UI anyway. I'd be happy to see one less color management
related window that 98% of applications ignore, including apparently
all of Apple's.
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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