NDLI: Scene-aware image dehazing based on sky-segmented dark channel prior

Content Provider	IET Digital Library
Author	Xiao, Jinsheng Zhu, Li Zhang, Yongqin Liu, Enyu Lei, Junfeng
Abstract	An improved dehazing algorithm based on dark channel theory is proposed, in order to solve the problems of colour distortion and halo effect which still exists in dark channel prior algorithm. The dark channel prior theory may lead to colour distortion in sky region. Firstly, the guided filter is used to refine the segmentation of the sky region, and the atmospheric light is estimated accurately. Then, the median filter is used to obtain the detailed edge information. So a more clear transmission can be gotten which effectively suppress the halo problem. Finally, the gamma correction is applied to enhance image lightness with an empirically selected gamma parameter. The experimental results show that the proposed algorithm can effectively remove the haze. It can correct the colour distortion of the sky area and eliminate the halo effect at the edge of the scene.
Starting Page	1163
Ending Page	1171
Page Count	9
ISSN	17519659
Volume Number	11
e-ISSN	17519667
Issue Number	Issue 12, Dec (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/11/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2017.0058
Journal	IET Image Processing
Publisher Date	2017-05-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Atmospheric Light Estimation Colour Distortion Problem Computer Vision And Image Processing Technique Dark Channel Prior Theory Empirically Selected Gamma Parameter Filtering Method in Signal Processing Gamma Correction Guided Filter Halo Effect Halo Problem Suppression Image Colour Analysis Image Enhancement Image Filtering Image Lightness Enhancement Image Segmentation Improved Dehazing Algorithm Median Filter Optical, Image And Video Signal Processing Scene-aware Image Dehazing Sky Brightness Sky Region Segmentation Sky-segmented Dark Channel Prior Algorithm
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

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