[argyllcms] Re: ArgyllCMS V1.3.0 has been released.

  • From: Sam Berry <samkberry@xxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Fri, 10 Sep 2010 11:23:25 +0100

I do believe you have a point, and having experienced the Spyder3's poor
inter-instrument agreement myself I think it's certainly something the
colorimeter owner needs to be aware of, but I'm not convinced it's better
than no correction at all. I do think that for the wobblier colorimeters
some sort of averaging would be needed. That said, The DTP-94 is still, by
most accounts still an excellent colorimeter, show excellent
inter-instrument agreement and is still available to buy new for a sensible
price, at least in Europe and the USA. I've not found any problems with
using it myself on wide gamut displays with correction, as it is used by
Quato. Simple matrix calculations using the three primaries result in a
white measurement of within 1deltaE of the reference measurements, showing
good linearity. My DTP-94 was bought used for 35 UK pounds, is several years
old, and agrees within 1deltaE of my eye-one pro on a standard gamut LCD. I
have yet to investigate whether my Spyder3 will behave as well. Either way,
I will find the tool very useful.

Sam Berry

2010/9/9 Konstantin Pyanzin <kokap@xxxxxxx>

> Thu, 09 Sep 2010 10:03:44 +1000 Graeme Gill <graeme@xxxxxxxxxxxxx>:
> > Graeme Gill wrote:
> > >     Added new utility ccmxmake, which makes Colorimeter Correction
> Matrices
> > >     for a particular Colorimeter + Display combination, using a
> > >     Spectrometer as a reference. The resulting .ccmx file can then be
> > >     used with spotread/dispcal/dispread (-X option).
> >
> > One thing I forgot to say was that if people want to contribute
> > correction matrices that they've made for particular colorimeter +
> display
> > combinations, I'm happy to put them on the website so that others can
> > make use of them. (And fair warning that I'm going to assume that
> > any ccmx files sent to me for that purpose are being placed in
> > the public domain).
> >
> > Graeme Gill.
> New "ccmxmake" utility and new "-X" option for spotread/dispcal/dispread
> are great.
> But I think that a database of contriibuted correction matrices is
> ineffective, taking into account bad inter-instrument agreement for
> colorimeters.

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