[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 :
http://img523.imageshack.us/my.php?image=argylltf1.gif
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 ?!
Cheers,
-Maxime
> 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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