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

  • From: lee scratchy <leescratchy@xxxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Sun, 23 Dec 2007 13:24:45 +0000

Thanks for the reply Graeme,

hehe yeah I'll stick to "-qh", it's already long enough and looks really good ;)

actually I was more wondering about the DE measurements precision on the s2 
compared to the i1 display(which is supposedly very close to the i1 pro).

when the s2 gives me a 0.8 average DE, does that mean it's completely 
off....and might just be >10 average if I was to check with a i1 display ?

but you seem to agree that the s2 is quite off on that point ? also with LCD ?

I'm already VERY happy with the PQ, but the idea of achieving better DE with a 
i1 display is starting to grow on me ;)


> Date: Mon, 24 Dec 2007 00:11:18 +1100
> From: graeme@xxxxxxxxxxxxx
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: dispcal: Warning - RegOpenKeyEx failed with 2
> lee scratchy wrote:
> > OK so I'm totally in love with the L* gamma.
> > it makes my HD movies look much more natural, it's just amazing!
>  > like watching through a window.
> Interesting.
> > The thing is that the "-qh" made the process take around 90 mins, maybe 
> > more :)
> That's quite long, but probably because the sensor reading is so slow
> for dark colors. That's the tradeoff - you can make it more repeatable (and
> possibly accurate) with long integration times, but add that to -qh,
> and it may take a while!
> Drift in the equipment may be an issue over that time period too.
> > I understood the Eye One Display was much more accurate when it comes to
>  > deltaE measurements(almost similar to the Eye One Pro), and that it was
>  > sensitive up to 20 IRE with a videoprojector....the spyder2 is sensitive
>  > up to 30 IRE, and needs much longer integration time as you said...
> The main advantage of the Eye One Pro is that it is going to be more
> accurate with any spectrum that a colorimeter has been specially
> calibrated to. The disadvantage is that it tends to collect less
> light than a colorimeter, so you really need a longer integration time
> to give a repeatable reading.
> > do you think the Eye One Display is more accurate than the s2 when it comes 
> > to DE measurements ?
> > I'm still hesitating to upgrade, considering only the red levels are off 
> > <30 IRE when used
>  > with argyll with "-qh"....
> My experience with my particular Spyder 2, is that it is in worse
> agreement with all the other instruments I have, when measuring
> my CRT screen. Now I have no way of knowing whether this is typical
> of all the Spyder 2's out there (I would need to test a few more),
> but it makes me wonder about them.
> Graeme Gill.

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