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Information 2017, 8(2), 57; doi:10.3390/info8020057

An Effective and Robust Single Image Dehazing Method Using the Dark Channel Prior

1
School of Electronic Information Engineering, Nanjing College of Information Technology, Nanjing 210023, China
2
School of Internet of Things, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
*
Author to whom correspondence should be addressed.
Academic Editor: Marco Leo
Received: 14 March 2017 / Revised: 15 May 2017 / Accepted: 15 May 2017 / Published: 17 May 2017
(This article belongs to the Section Information Processes)
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Abstract

In this paper, we propose a single image dehazing method aiming at addressing the inherent limitations of the extensively employed dark channel prior (DCP). More concretely, we introduce the Gaussian mixture model (GMM) to segment the input hazy image into scenes based on the haze density feature map. With the segmentation results, combined with the proposed sky region detection method, we can effectively recognize the sky region where the DCP cannot well handle this. On the basis of sky region detection, we then present an improved global atmospheric light estimation method to increase the estimation accuracy of the atmospheric light. Further, we present a multi-scale fusion-based strategy to obtain the transmission map based on DCP, which can significantly reduce the blocking artifacts of the transmission map. To further rectify the error-prone transmission within the sky region, an adaptive sky region transmission correction method is also presented. Finally, due to the segmentation-blindness of GMM, we adopt the guided total variation (GTV) to tackle this problem while eliminating the extensive texture details contained in the transmission map. Experimental results verify the power of our method and show its superiority over several state-of-the-art methods. View Full-Text
Keywords: dehazing; DCP; fusion technique; transmission correction dehazing; DCP; fusion technique; transmission correction
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Yuan, X.; Ju, M.; Gu, Z.; Wang, S. An Effective and Robust Single Image Dehazing Method Using the Dark Channel Prior. Information 2017, 8, 57.

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