[argyllcms] Display calibration - Hardware question

  • From: János, Tóth F. <janos666@xxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Sat, 12 Jul 2014 04:44:20 +0200


During the last few years, I have been using different colori- and
spectrophoto-meters (mostly together) for display calibration as
consumer grade products (both displays and measuring instruments) and
my knowledge changed (hopefully all improved but I wouldn't dare to
say it with confidence about either :D).

After I upgraded my small toolset with an i1 Display Pro (i1d3)
colorimeter (replacing an old i1d2), I started to question the benefit
of creating correction matrices with my older ColorMunki Photo spectro
(the old i1d2 obviously needed that but I wasn't sure if the
ColorMunki Photo is any more accurate --- if not slightly but
unequivocally less accurate ??? --- on a random display than an i1d3
alone). I tried to read the opinions and look at test results of as
many individuals as possible but it was very puzzling (some said the
i1d3 is very accurate without corrections while the CM is NOT and some
said the i1d3 still needs corrections and a CM grade spectro is still
much more reliable), so I couldn't decide.

Since I wasn't sure, I kept using the CM Photo to create correction
matrices for the i1d3 and I thought I might upgrade to an i1 Pro 2 in
time (hopefully when it becomes cheaper - for example, an OEM version
without the extra tools for cheap...).
But now, my CM stopped working completely. It must be some kind of
contact problem inside it's case: the device is accessible in the
default measuring position but becomes unavailable in any other
"dialer" positions, so self-calibration is no longer possible (and
thus the device is useless). But I don't even care to try and possibly
get it fixed because it's ~3 years old already, so it would be time to
dispose of and get a fresh one anyway (especially when I consider the
"i1d3: better of worse" question).

But now I wonder if somebody got some more solid informations by now.

Should I even care to create profiles for the i1d3 with a CM or i1 Pro
2 grade spectro? Is the i1d3 accurate enough (or even more accurate)
alone on a random (*) display?

* I mostly use it on HDTV (mostly PDP, sometimes through 3D LCD
glasses) and projector (mostly DLP) screens, so the supplied EDR files
don't really cover my usage cases. However, the difference between the
EDRs are not that big and I don't really need "spot-on", just a "good
enough" accuracy in general (consumer grade HDTVs are never "spot-on"
regardless how you calibrate them, just better than out of box...).

So, what do you think? Should I go for an i1 Pro 2 and use it to
profile my i1d3 or use the i1d3 alone in any case (even if I get a
spectro for other reasons anyway)?

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