[argyllcms] Re: bin/average: averaging and possible outlier elimination for three or more .ti3 sets?
- From: Craig Ringer <craig@xxxxxxxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 29 Aug 2009 21:15:04 +0800
On Sat, 2009-08-29 at 12:25 +0100, Alastair M. Robinson wrote:
> > Here's an example error spike:
> >
> > 5: 83.070051 1.346918 2.895409 <=> 82.505987 1.360226 2.779120 de 0.576080
> > 6: 82.110832 1.536077 2.992189 <=> 81.607727 1.437567 2.733480 de 0.574238
> > 7: 40.886825 4.316704 18.048722 <=> 82.063784 1.539669 2.906388 de
> > 43.960711 **** Huge error spike ****
>
> Very likely to be a reading glitch - we saw similar problems when Robert
> from the Gutenprint project tried out his i1Pro and GPLin. I've been
> meaning since then to put together something myself to help with outlier
> elimination, but never got that far.
Yeah. There are even a few points that look almost like value
transposition. The two values with highest dE, for example, are:
184: 37.428620 -5.000581 0.024627 <=> 78.810882 -2.002915 60.115930 de
73.023573
732: 79.038963 -1.977274 60.090194 <=> 36.299104 -1.068111 -7.373731 de
79.868037
(
according to:
verify -v ruralpress1.sampleB.ti3 ruralpress1.sampleC.ti3 | sort -n -k 10
)
See how the L* in particular looks almost neatly transposed between the values?
--
Craig Ringer
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