[argyllcms] Re: Spectroradiometric measurements

Roger Breton wrote: 
Once you have the data in 5nm or 10nm form, then it is straigthforward to
compute tristimulus values.


The Argyll spectral module (xicc/xspect.c) currently does a linear 
interpolation
to 1nm, and then discretely integrates at 1nm intervals. For spectra at 5nm 
intervals or
better, this is (I believe) an acceptable approach. I think the CIE recommend
using a third-degree polynomial if the spectra is sampled at worse than 5nm
intervals. I've a mind to add polynomial interpolation at some stage..

Graeme Gill.

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