Single Image Adaptive Defogging Algorithm Based on Guidance Filtering

Abstract

Outdoor images are often severely degraded due to atmosphere scattering of suspended particles on the condition of haze and foggy weather.In order to solve the problem,this paper proposes a single image adaptive defogging algorithm.Transmission is estimated indirectly by the method of accurate atmospheric veil through guided filtering on the basis of analysis of characteristic for atmospheric veil.Transmission of bright areas can be adjusted utilizing adaptive threshold value which obviously reforms the false colors in defogging images.At last,the images are recovered in the way of taking advantage of atmosphere scattering model.Experimental results show that compared with traditional guidance filtering algorithm and selecting stationary threshold value algorithm,the obtained defogging images have clearer nearby view and more natural bright areas,and the computational speed is improved.