Re: Monitor calibration software/hardware
Re: Monitor calibration software/hardware
- Subject: Re: Monitor calibration software/hardware
- From: Graeme Gill <email@hidden>
- Date: Mon, 24 Sep 2007 14:48:10 +1000
email@hidden wrote:
Huey has a much wider angle of view (so factors in inaccurate color emissions
from off-angles on low quality screens), and uses three sensors/filters
instead of four. It also has a much reduced area of shielded screen during
measurement, so that ambient light effects are more intense. And its positioning on
screen is less consistant. Those seem like fairly significant differences to me.
The Huey does seem much more cheaply made (as you would expect, given
the price), and as you note, has three sensors/filters compared to the Spyders 7.
Observing the angle at which the sensor no longer is visible though, it
appears as if they have they have roughly similar acceptance angles, being
wider than the Eye-One Display or DTP94. I'm not currently able to do any
measurements with the Huey to support this observation though.
(I think Edmund was meaning the Eye-One Display, not the Eye-One Pro by the way!).
If I measure the black level on my MacBook (which has a very poor vertical viewing
angle, with quite a lot of light coming from it when you are a few degrees below
the 90 degree mark - a rather disappointing display from Apple), I measure the
following for different instruments:
X Y Z D50 L* a* b*
Spectrolino: 0.366415 0.352546 0.692548 3.184534 1.069715 -7.584697
Eye-One Pro: 0.405160 0.391266 0.731828 3.534291 1.126687 -7.723253
Eye-One Display: 0.909546 0.913935 1.476462 8.252869 1.108462 -10.501008
DTP94: 1.010000 1.010000 1.850000 9.074471 1.321416 -13.169153
Spyder 2: 2.827000 2.660000 4.919000 18.627292 4.922603 -18.434490
(As an aside, the agreement between instrument as to absolute luminance levels
seems abysmal, something Roger Breton note some time ago).
Now whether a very narrow acceptance angle is a realistic representation
of how the viewer sees the screen is an interesting question, as is how
much it actually affects the end result.
Graeme Gill.
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