Multispectral polarization image defogging method combined with sky light polarization model

The invention provides a multispectral polarization image defogging method combined with a sky light polarization model, which comprises the following steps: under a foggy weather condition, firstly,acquiring polarization images under different spectrum channels by using a multispectral polarization imaging detection system, and simultaneously measuring the aerosol optical thickness of a corresponding spectrum band by using a sun photometer; secondly, inputting a detection waveband, a solar zenith angle, aerosol optical thickness, aerosol particle scattering information and the like into a sky light polarization model; obtaining a sky light polarization state distribution diagram through simulation, selecting a sky area in a horizontal field angle on a detection azimuth angle, and obtaining the average value of the light intensity and the average value of the polarization degree to serve as an atmospheric light intensity value and an atmospheric light polarization degree value at infinity respectively. And fi