According to degraded phenomena of images taken in foggy weather

this paper proposesd an algorithm of foggy image enhancement based on Single-Scale Retinex.The proposed algorithm first conversed RGB color space to HSI space.Using Retinex to estimate the fog veil of brightness whose distribution was in accord with the real fog density of the scene.The reflectance image could be obtained by subtracting the veil from the degraded image. Then

using bilateral filtering extracted the reflectance information included in the veil.The result image could be obtained by fusing the both reflectance images

using linear stretching to adjust saturation and conversing to RGB color space.Experiments show that the algorithm is more effective in foggy weather.