Estimation of Parameters in Atmospheric Scattering Dehazing Model in Accordance with Visual Characteristics
Keywords:
Image dehazing, atmospheric scattering model, atmospheric light, transmittance.Abstract
In view of the problem that the restoration effect of the daytime defogging algorithm is not ideal, especially the over-enhancement and color distortion in the sky and its nearby. A new parameter estimation method for atmospheric scattering model is proposed. Firstly, the sky and non-sky areas are segmented. Then, estimating the atmospheric light at the junction, and then corresponding restrictions on the value of transmittance according to the change of the depth of field. Finally, the transmittance is optimized by context-based regularization, so that the final image after dehazing is more in line with the visual characteristics. Through the subjective comparison and analysis with the existing mainstream algorithms, the dehazing effect of the proposed method has the advantages of low noise and high color recovery, especially in the sky. The restoration with the non-sky junction is the best, enriching the details that other algorithms have not restored and the colors are true and natural.
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