期刊
JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
卷 26, 期 -, 页码 132-145出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jvcir.2014.11.006
关键词
Underwater image restoration; Color correction; Image dehazing; Contrast enhancement; Visibility recovery; Dark Channel; Artificial lighting; Attenuation; Underwater image degradation
资金
- Project of the Spanish Ministry of Economy and Competitiveness [MTM2013-40824-P]
- BCAM Severo Ochoa accreditation of excellence [SEV-2013-0323]
- CYTED [712RT0449]
- Basque Government Consolidated Research Group Grant on Mathematical Modeling, Simulation, and Industrial Applications (M2SI) [IT649-13]
Underwater images typically exhibit color distortion and low contrast as a result of the exponential decay that light suffers as it travels. Moreover, colors associated to different wavelengths have different attenuation rates, being the red wavelength the one that attenuates the fastest. To restore underwater images, we propose a Red Channel method, where colors associated to short wavelengths are recovered, as expected for underwater images, leading to a recovery of the lost contrast. The Red Channel method can be interpreted as a variant of the Dark Channel method used for images degraded by the atmosphere when exposed to haze. Experimental results show that our technique handles gracefully artificially illuminated areas, and achieves a natural color correction and superior or equivalent visibility improvement when compared to other state-of-the-art methods. (C) 2014 Elsevier Inc. All rights reserved.
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