Re: Profile monitor for many users
Re: Profile monitor for many users
- Subject: Re: Profile monitor for many users
- From: david wollmann <email@hidden>
- Date: Fri, 29 Apr 2011 12:12:15 -0600
On Apr 29, 2011, at 10:23 AM, Peter Miles wrote:
There is no
guarantee that monitor brightness will be the same for original-admin-
user next time they log on. So even with the current arrangement,
their profile may no longer describe the behavior of the display
next time they log in.
We currently take a 'window-grab' of the brightness slider position
at the time of profile generation. For color critical work we suggest
to our photography students to open the 'window-grab' of the
brightness slider and compare it with the position of the brightness
slider in monitor/system prefs. In case a previous user has changed
it. Not the most elegant solution.
I always find the brightness slider to be just slightly short of
useless. Why are there no harsh marks along the scale? At least then
there would be a visible reference point, currently the best you can
do is reference the position in relation to the letters underneath the
slider.
Back in the glorious bygone days when ColorSync worked reliably I used
a set of Apple Scripts to check what the brightness value was set to
and there was also a script I could place in a start-up folder to
always set the brightness to a specified setting. (Someone on this
list was kind enough to share them years ago)
I find it odd that the brightness slider has no hash marks, not even a
center position, and yet when I run the Apple Script to query the
system about the brightness value, it returns to me a number with no
less then 16 numerals after the decimal. One reference is way too
course and cavalier about its position and the other seems overly
precise.
The scripts worked for me up to Mac 10.5.8, Snow Leopard, 10.6, broke
their usefulness and I have yet to find a way to recreate them.
For my lab at Arapaho Community College where I teach Color
Management, each student can, and must build their own custom display
profile for their work station. Their profile is stored in their own
User folder.
We found that each 27" iMac (LED screens) could not be set to less
than 200 cd/m2. The spec given by Xrite for LCD's and LED's is 120 cd/
m2. So, for these students to place their screens back to same
brightness level, if they had been moved by others, all they had to do
was move the slider all the way back to the left, the minimum
brightness.
For these iMacs thats how we handled variability in brightness, set it
to minimum and check that position at the start of class.
David Wollmann
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