Re: fundamental question - monitor profile as working RGB?
Re: fundamental question - monitor profile as working RGB?
- Subject: Re: fundamental question - monitor profile as working RGB?
- From: Chris Murphy <email@hidden>
- Date: Tue, 9 Dec 2003 14:21:20 -0700
On Dec 9, 2003, at 11:50 AM, bruce fraser wrote:
It's a stupid idea. As others have pointed out, it's not necessarily a
catastrophe, but it doesn't come within shouting distance of being an
optimal workflow.
Monitor RGB alone yes. But for the policy to be convert to Monitor RGB,
that's begging for catastrophe. At least the profile is embedded with
this policy, but that's about the only plus side. When there are a
number of far superior ways to set things up, it's too bad such an idea
gets valuable ink on paper space.
Chris, several monitor profiling packages let you simply profile the
current state of the monitor without forcing a calibration or making
any assumptions about gray balance. ProfileMaker Pro does this, and
the Sony Artisan lets you profile the native gamma of the monitor
without tweaking the video LUT.
Most packages, by default, produce profiles that assume the monitor is
gray balanced. In the case of the Artisan, its profiles always assume
the display is gray balanced, because it is, even when the Artisan
builds a profile for the native gamma of the display.
However, it's safer to assume that display profiles are not "well
behaved" and just not go down that road. I'd much prefer Adobe get
serious about handling web graphics in a way that automatically
preserves color appearance and then simply dumps Monitor RGB as an
option outside of Proof Setup.
I've long felt that forcing the display to a specific gamma value is a
hangover from the days when we tried to do color management by trying
to force every monitor to behave identically (which didn't work).
Nowadays I generally set color temperature (on CRTs), white luminance
and black level, then profile at the native gamma. It gives me an
accurate display with smooth gradients, where forcing a gamma tweak
often produces some banding.
Exactly. In particular with respect to flat panel displays.
Unfortunately Apple doesn't agree, and as a result there is a
discrepancy in how to deal with web images on OS X. Some web browsers
assume sRGB, some use Monitor RGB. It would have been easier and better
if the legacy 1.8 gamma had been deprecated.
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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