A Region-Wised Medium Transmission Based Image Dehazing Method

IEEE Access

Zhixin Guo¹  Zhenzhen Sun¹  Hui Yuan¹  Changchun Liu¹ 

[1] School of Information Science and Engineering, Shandong University, Jinan, China;

关键词: Image dehazing;    image segmentation;    dark channel prior;   

DOI  :  10.1109/ACCESS.2017.2660302

来源: DOAJ

【 摘 要 】

Image dehazing is a technique to enhance the images acquired in poor weather conditions, such as fog and haze. Existing image dehazing methods are mainly based on dark channel prior. Since the dark channel is not reasonable for sky regions, a sky segmentation and region wised medium transmission based image dehazing method is proposed in this paper. Firstly, sky regions are segmented by quad-tree splitting based feature pixels detection. Then, a medium transmission estimation method for sky regions is proposed based on color characteristic observation of sky regions. The medium transmission is then filtered by an edge preserving guided filter. Finally, based on the estimated medium transmission, the hazed images are restored. Experimental results demonstrate that the performance of the proposed method is better than that of existing methods. The restored image is more natural, especially in the sky regions.

【 授权许可】

Unknown