Single Image Dehazing Method under the Influence of Un-uniform Illumination
Wenhua Zhang, Shanshan Gao, Jing Chi, Hui Liu, Yuanfeng Zhou · 2016
Since the adverse effects may occur when the atmosphere value under un-uniform illumination is estimated, this paper proposed a dehazing method by using the homomorphic filtering technology. The innovation of this approach is that we use homomorphic filtering technology to remove un-uniform illumination firstly before obtaining its dark channel, then dehaze the pretreated image. During the process of transmission optimization, applying SLIC super pixel segmentation method to estimate the rough transmission rate, then we use guided filtering for a more accurate transmission. Besides, a new algorithm is proposed to estimate the atmosphere value aiming to the affects causing by un-uniform illumination. Experimental results show that this algorithm is efficient to avoid the degradation of hazed images, thus the image clarity could be improved.