Fig. 4
From: A review on dark channel prior based image dehazing algorithms
Estimation of the atmospheric light [10]. a Hazy image. b Dark channel, where the size of Ω is 15 × 15 and the region inside the red boundary lines corresponds to the most haze-opaque region. c Patch used to determine the atmospheric light. d, e Patches that contain intensity values higher than that of the atmospheric light