My question is totally different. For example , autochrome , there are 6 different colors at the filter. I ve posted the dyes. Dyes have a spectrum curve. And there is a published only RGB curve analysis of Autochrome.

How can we calculate from these dye curves or RGB curves , how a RGB xyz color transforms at the film x2y2z2.

And how can we see this transform at a graphic.

Above posted software link , may be relates with this question but I dont know it solves the problem