Re: Monitor calibration & profiling in a multiuser OSX environment.
Re: Monitor calibration & profiling in a multiuser OSX environment.
- Subject: Re: Monitor calibration & profiling in a multiuser OSX environment.
- From: Roger Breton <email@hidden>
- Date: Mon, 01 Sep 2003 20:35:33 -0400
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Our plan here is to teach students what calibrating and profiling monitors is
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about, then get them to do it so they can see how it works. Hopefully they
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will
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appreciate it's practical value and take it out into the industry.
So you are in a university envoronment. I also teach in a university
environment and one of the problem we face in our lab is that everyone has
different 'viewing' needs. So, the first thing most students do the nimute
they logs on to one of the WindowsXP stations in the labs is to fool around
with the OSD controls of the 19" Phillips Brillance CRTs to suit their
preferences. Some use Maya and Autocad so they want all the luminance they
can get from the monitors. Others use video editing apps like Premiere and I
don't know what are the requirements for video editing. Others still, like
me and my students, do image editing and DTP so we use 6500K calibration
(I'd prefer 5000K personnally but that scares the uninitiated everytime).
There is no way to satisfy everyone and no one group is willing to give up
for the sake of one unifying standard. I don't know what the situation is at
other universities. It's a riot!
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3 - The lectures I support consider teaching students monitor profiling an
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advanced stage of a designers or photographers education.
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Previously with OS9 our non expert users ended up with a reasonably calibrated
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and profiled monitor by default when they logged on. This no longer occurs
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with
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monitor profiles as personal preferences.
I know.
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Is there provision in OSX for the OS to use only a local root level monitor
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profile and ignore a users personal monitor profile?
Maybe John Gnaedy can answer that one?
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Has the monitor profiling philosophy changed?
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Is my understanding correct that there are now essentially two schools of
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thought regarding monitor profiling?
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1 - adjust monitor hardware close to target conditions (luminance, white point
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etc.) - then profile it.
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2 - leave monitor in 'native/Raw' state and profile it and let software
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adjustments in the profiling process make the adjustments.
The way I understand the latest v4 ICC specs and the incorporation of the
chromatic adaptation tag in monitor profiles, practically any color
temperature (above 5000K) can be used for calibrating and profiling monitors
successfully. Because, no matter what the state of the monitor is the
calculated profile will always result in 'D50 corresponding colors'. That is
what monitor profiling software manbufacturers have to produce by the latest
specs and that is the color theory this is based on. The PCS is D50 and
monitor profiles have to adapt, by definition, all screen colorimetry to
produce D50 colors to the screen, regardless of how they are calibrated.
If you believe the color theory behind chromatic adaptation and color
appearance models, in a broader sense (like me), then this is all you can
go by today. Beyond those theories, I don't see anything yet.
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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