re: dark monitor calibration
re: dark monitor calibration
- Subject: re: dark monitor calibration
- From: Dan Reid <email@hidden>
- Date: Wed, 04 Sep 2002 11:02:14 -0600
On Tue, 3 Sep 2002 16:11:51 -0400, email@hidden wrote:
>
I've learned to live with this (more or less) but every time I
>
profile/calibrate my monitor(s) the resulting calibration just seems dark
>
to me...like black is being exaggerated. This seems to be the case with all
>
three calibration tools/instruments I have (OptiCal, iOne w/ICC Display
>
2.1, LaCie Blue Eye) at my disposal. Generally speaking I leave black point
>
alone and specify a luminance of 85 or so, and I usually calibrate to a
>
color temperature of 5500K at a gamma of 1.8. Things seem to display darker
>
almost everywhere regardless of the application. What could I possibly be
>
doing wrong? Calibrating a monitor isn't exactly rocket science. This dark
>
behavior seems to be pretty consistent across the workgroup (mostly
>
Mitsubishi Diamond Pro monitors) regardless of which piece of software I
>
use.
Well most CRT monitors I have worked with indicate a natural gamma
response curve any where from 2.0 - 3.0.
Since most it's often recommend to use Adobe RGB for print workflows instead
of the smaller ColorMatch RGB color space, calibrating to a gamma of 2.2
does not force the CRT (video card) into a gamma response that can reduce
color fidelity. With Optical you can see the natural gamma curve,
calibration curve (VCLUT), and the resultant gamma response. Check it out.
Also Adobe RGB use a 6500K white point. You'll find that the monitor
appears a little color (maybe cleaner white?) calibrating with PreCal before
doing the Optical calibration. To maximize monitor brightness I set the Red
gun to 100% and dial in the blue and green guns to my target white point. I
further reduce ALL of the guns together with the monitor's contrast control
to hit my target luminance value. Use Optical's precision mode to nail the
brightness (gain setting) using the colorimeter/spectro. I feel the 85 cd/m2
is way too low which probably contributes to larger complaint you are
voicing. I shoot for at least 100 cd/m2 and higher if possible. Don't
believe the curmudgeons out there who voice a monitor will die quickly. You
don't care if you lose 6 months or so do you? Heck color is priority for you
and Filenes's can buy another 1,000+ monitor every 3 - 4 years.
This approach can maximize monitor brightness and color gamut by not
forcing the monitor to behave differently from it's natural state.
--
Dan B. Reid
RENAISSANCE PHOTOGRAPHIC IMAGING
http://www.rpimaging.com | email@hidden
Toll Free: (866) RGB-CMYK
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