[argyllcms] Re: colprof: Error - Requested spectral interpretation when data not available

  • From: Graeme Gill <graeme@xxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 15 Nov 2012 13:11:44 +1100

Ivan Tsyba wrote:
> R080505.txt and resulting IMG_0523.ti3 do not have spectral data that
> needed for -i switch.

Yes, that's the problem.

> I'm not sure if colprof and scanin can use spectral data for input devices
> profiling. 

It should work - profin.c has the code to convert spectral to reference XYZ 
values.

> If not, at least in theory, you can use your .sp file to
> calculate tristimulus values of your chart under that illuminant using
> chart spectral reflectance data, and then use that values as usual in
> scanin, but I can't figure how to do this with available argyllCMS tools
> (calculate XYZ from chart reflectance and illuminant spectrum data).

You would use spec2cie, but it shouldn't be necessary.

Graeme Gill.

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