Method for recovering multispectral information in foggy days

The invention provides a method for recovering multispectral information in a foggy day, which comprises the following steps of: acquiring a multispectral fog image in the foggy day, and extracting the multispectral fog image after spectral correction; fitting a relative extinction coefficient function related to the wavelength by utilizing a linear regression equation, and quantitatively representing spectral information degradation in the haze; then calculating first s dark channel images, and substituting the first s dark channel images into the established model equation to recover multispectral transmittance information and multispectral atmospheric light information; multi-spectral scene target information in the foggy day is recovered; according to the method, multispectral transmittance information, multispectral atmospheric light information and finer and clearer scene information in cloudy and foggy days are effectively recovered, the problem of spectrum degradation and distortion in cloudy and fogg