Spectrum reconstruction method and device and electronic equipment

The invention discloses a spectrum reconstruction method and device and electronic equipment, and the method comprises the steps: obtaining a human skin color database, a data set comprising a training set and a verification set; obtaining RGB response values of samples in the training set and reflectivity corresponding to the RGB response values; carrying out polynomial extensions of different orders on the RGB response value to obtain polynomial terms corresponding to the polynomial extensions of different orders, and adopting a principal component analysis method for the reflectivity to obtain feature vectors of different numbers of the reflectivity; combining polynomial term numbers corresponding to polynomial extensions of different orders and different numbers of each feature vector, determining indexes of spectrum reconstruction performance corresponding to each order under different numbers, wherein the indexes comprise chromatic aberration and spectrum errors; and determining a target order and a tar