Le 14/08/2013 17:51, johannes hanika a écrit :
>
>
>
> On Wed, Aug 14, 2013 at 5:50 PM, Pascal Obry <[email protected]
> <mailto:[email protected]>> wrote:
>
>
> Hi Johannes,
>
> > for everybody's continued basecurve calibration pleasure i've pushed a
> > small c program to git master:
> >
> > https://github.com/darktable-org/darktable/tree/master/tools/basecurve
>
> Great!
>
> > which you can use to extract a basecurve from a raw + jpg pair. it
> takes
> > a lot less memory than the python script and will create an optimized
> > fit to only 8 control points (you can increase it from the cmdline if
> > necessary). it'll give you a line of code to insert into
> iop/basecurve.c
> > to get a new preset (after a recompile).
>
> Hum, lot of things are output on my side. I found the necessary line for
> iop/basecurve.c in the middle of a huge float number output :) Maybe
> some debug data still output?
>
>
> right, forgot that detail. you have to call it like
>
> make && ./basecurve inputraw.ppm inputjpg.ppm > basecurve.dat 2> fit.dat
>
> i should really create those files directly.
Hum... In fit.dat I have:
# err 114236096512.000000 improved 4 times
# copy paste into iop/basecurve.c:
# { "new measured basecurve", "", "", 0, 51200,
{{{{0.000
000, 0.003646}, {0.002878, 0.001839}, {0.025967, 0.034900}, {0.065501,
0.167940}
, {0.203832, 0.503986}, {0.476704, 0.863786}, {0.740543, 0.998729},
{1.000000, 0
.000000}}}, {8}, {m}}, 0},
0.000000 0.003647
0.000015 0.003632
0.000031 0.003632
0.000046 0.003616
0.000061 0.003601
0.000076 0.003601
0.000092 0.003586
...
<followed by 65500 lines with 2 floats>
Maybe something wrong with my input files?
--
Pascal Obry / Magny Les Hameaux (78)
The best way to travel is by means of imagination
http://v2p.fr.eu.org
http://www.obry.net
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