关键词: 去雾, 暗原色先验, 加权, 透射率

Abstract: Images taken in foggy weather are seriously degraded due to the scattering of atmospheric particles. A simple and effective haze removal algorithm from a single image is proposed. Firstly, a halo evaluator is designed to detect halo zone. Then, precise transmission rat is obtained by weight fusion of single pixel based rate and block area based one, both taking the prior of dark channel. The weight is determined according to the halo evaluator. Finally, a parameter is added for image recovery to limit the low transmission and to protect the sky area. Experiments show that compared with other methods, more vivid and natural images can be recovered by the proposed method, especially at the edges of the foreground and the background and in the sky area.

Key words: dehazing, dark channel prior, weighting, transmission