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Sensors 2017, 17(10), 2175; https://doi.org/10.3390/s17102175

Robust Dehaze Algorithm for Degraded Image of CMOS Image Sensors

1
College of Aeronautics and Astronautics Engineering, Air Force Engineering University, Xi’an 710038, China
2
Foundation Department, Air Force Engineering University, Xi’an 710051, China
3
Information and Navigation College, Air Force Engineering University, Xi’an 710077, China
*
Author to whom correspondence should be addressed.
Received: 29 August 2017 / Accepted: 18 September 2017 / Published: 22 September 2017
(This article belongs to the Section Physical Sensors)
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Abstract

The CMOS (Complementary Metal-Oxide-Semiconductor) is a new type of solid image sensor device widely used in object tracking, object recognition, intelligent navigation fields, and so on. However, images captured by outdoor CMOS sensor devices are usually affected by suspended atmospheric particles (such as haze), causing a reduction in image contrast, color distortion problems, and so on. In view of this, we propose a novel dehazing approach based on a local consistent Markov random field (MRF) framework. The neighboring clique in traditional MRF is extended to the non-neighboring clique, which is defined on local consistent blocks based on two clues, where both the atmospheric light and transmission map satisfy the character of local consistency. In this framework, our model can strengthen the restriction of the whole image while incorporating more sophisticated statistical priors, resulting in more expressive power of modeling, thus, solving inadequate detail recovery effectively and alleviating color distortion. Moreover, the local consistent MRF framework can obtain details while maintaining better results for dehazing, which effectively improves the image quality captured by the CMOS image sensor. Experimental results verified that the method proposed has the combined advantages of detail recovery and color preservation. View Full-Text
Keywords: CMOS image sensors; image dehaze; atmospheric scattering model; local consistent Markov random field CMOS image sensors; image dehaze; atmospheric scattering model; local consistent Markov random field
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Qu, C.; Bi, D.-Y.; Sui, P.; Chao, A.-N.; Wang, Y.-F. Robust Dehaze Algorithm for Degraded Image of CMOS Image Sensors. Sensors 2017, 17, 2175.

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