RGB values of visible spectrum

Question

I need an algorithm or function to map each wavelength of visible range of spectrum to its equivalent RGB values. Is there any structural relation between the RGB System an

Answer 1

If you want an exact match then the only solution is to perform a convolution of the x,y,z color matching functions with your spectral values so you finally get a (device-independent) XYZ color representation that you can later convert into (device-dependent) RGB.

This is described here: http://www.cs.rit.edu/~ncs/color/t_spectr.html

You can find the x,y,z color matching function for convolution here: http://cvrl.ioo.ucl.ac.uk/cmfs.htm