[argyllcms] Re: Need help with error message...
- From: Leonard Evens <len@xxxxxxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 10 Apr 2009 10:51:22 -0500
On Fri, 2009-04-10 at 10:59 -0400, 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^2
> Target white value is XYZ 7.489355 3.107830 41.295990
> 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
> Total Iteration 3, Final Samples = 64 Final Repeat threshold = 0.600000
> Creating initial calibration curves...
> dispcal: Error - Mcv fit conjgrad failed
I look forward to responses since I often have trouble interpreting the
output of dispcal.
But certain things seem very strange on their face. Perhaps I am
misinterpreting something, but wouldn't an initial native brightness of
about 3.1 cd/m^2 would mean the screen looked pitched black? Also, if
`power' means the output as a power of the input, then a power of over
3000 would be preposterous.
As I said, the experts may be able to tell you what you did wrong, but
the readings seem to my minimally educated eye as being way out of any
plausible range.
>
> Any help is greatly appreciated, I am really trying to not have to
> install window xp to get an ICC file for my monitor.
>
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