[argyllcms] Re: dispcal: Warning - RegOpenKeyEx failed with 2

  • From: lee scratchy <leescratchy@xxxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Sat, 22 Dec 2007 14:14:03 +0000

ok thanks for all the detailed explanations, much appreciated!

well I wanna reach D65 to get true to life colors in my HD movies mainly.

ok so here's the deal :

top is argyll, bottom is s2pro software.

so I've used "dispcal -v -yc -t6500 -qh test" then "dispwin test.cal"

BTW, does dispcal reset the LUT before calibrating or should I reset it with 
some other app ?

I've used the pre-calibration options(choice 5) of dispcal to set the OSD 
properly, I've played around with R/G/B and brightness....but it didn't ask to 
change the contrast setting...did I miss something ?

anyhow, I'm very happy with the calibration, it looks outstanding!

I'll try on my DLP projector during the week-end, the s2pro did a pretty poor 
job <30 IRE...but the spyder2 is notorious for being not too sensitive in dark 
colors, which requires to make much longer measurements I think.

do you think I would see some major improvement if I upgraded to a Eye One 
Display ?!



> Date: Sat, 22 Dec 2007 13:10:59 +1100
> From: graeme@xxxxxxxxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: dispcal: Warning - RegOpenKeyEx failed with 2
> lee scratchy wrote:
> > I think you should really make a simple HOWTO with the basic steps everyone 
> > needs...or maybe a GUI ?
> Well, this <http://www.argyllcms.com/doc7/Scenarios.html> is
> intended to be exactly that. I'm certainly open to suggestions
> as to how it can be improved though.
> My focus is on making available the underlying functionality
> in the GNU release - lprof is a better bet if you want
> a GUI display profiling application. I am working
> on a GUI version of Argyll, but it is not a GNU licensed project.
> > I thought 2.2 gamma and D65 were the default arguments.
> Gamma 2.2 (1.8 on OS X) is the default, but the default white point
> is the native white point, since that's the easiest way to
> specify that behaviour. See <http://www.argyllcms.com/doc7/dispcal.html#t>.
> > now I've RTFM and indeed that becomes crystal clear, even though I don't 
> > really get the
> > difference between D65 and 6500K but I'll try both...all I want is the 
> > lowest dE possible ;)
> They are different spectra, so they have a different locus when plotted on
> a chromaticity diagram. They are quite close, but a little apart.
> See Figure 1 of 
> <http://www.usna.edu/Users/oceano/raylee/papers/RLee_AO_CCTpaper.pdf>.
> The top line is Daylight, the bottom is Black body.
> The exact white point isn't that important when you are viewing a
> display in isolation, since your eyes adapt to the white point. It
> only becomes critical for proofing situations where you are
> viewing samples side by side.
> Graeme Gill.

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