Image Defogging Improvement Under Non-uniform Fog Concentration
Dapeng Chen · 2020
Atmospheric scattering model is the main method of image defogging. Aiming at the defects of the existing defogging algorithms in different aspects, this paper puts forward some improvement measures based on the analysis of the defects of the existing defogging methods. In view of the irrationality of estimation of atmospheric light and atmospheric scattering coefficient, a method of locating atmospheric light region based on edge extraction and a method of selecting atmospheric scattering coefficient based on fog concentration are proposed. The estimation of depth of field and transmittance is improved. Finally, adaptive contrast enhancement is carried out for foggy image. The effectiveness of the proposed method is verified by comparative experiments.