[argyllcms] Re: Need help with error message...
- From: Raul Torres <racerraul@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 21 Apr 2009 21:16:52 -0400
Thanks for putting me on track... it turns out I had my brightness set too low.
set the display to default and the calibration ran...
I think I now have a good grasp on it works.
On Sat, Apr 11, 2009 at 1:07 AM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
> Raul Torres wrote:
>>
>> I was able to calibrate the monitor white & black level\point with my
>> spyder2, however when moving on to the calibration process this is
>> what I get after 64 of 64 patches complete.
>>
>> Initial native brightness target = 3.107830 cd/m^
>> Target white value is XYZ 7.489355 3.107830 41.295990
>
> ^^^^^^^^ ^^^^^^^^^
> There's something badly wrong with your readings. A color
> with such an XYZ value isn't even possible.
>
>> Adjusted target black XYZ 0.00 0.20 0.16, Lab 30.29 -130.55 46.15
>> Target black after min adjust: XYZ 0.00 0.20 0.16, Lab 30.29 -130.55 46.15
>> dispcal: Warning - Computing effective gamma and input offset is
>> inaccurate (0.000665)
>> Gamma curve input offset = 0.999000, output offset = 0.000000, power =
>> 3226.405708
>
> So you get silly numbers as things progress.
>
>> Total Iteration 3, Final Samples = 64 Final Repeat threshold = 0.600000
>> Creating initial calibration curves...
>> dispcal: Error - Mcv fit conjgrad failed
>
> And then the maths fails.
>
> Use spotread to figure out what's going on, and to get
> a reasonable white value (XYZ's approximately equal
> and a Y values somewhere between 50 and 400 depending
> on whether this is a dull CRT of a bright LCD).
> You can put up a white test window using "dispwin -m".
>
> If you're always getting nonsense, even after the usual things like
> unplugging and re-plugging the instrument, run with diagnostics
> on (spotread -D5), and send me an email of it.
>
> Graeme Gill.
>
>
--
Maintaining sanity for my children, my wife, my good friends and the
next ride! -Raul Torres
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