期刊
JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
卷 38, 期 -, 页码 504-516出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jvcir.2016.03.029
关键词
Deep-sea imaging; Inherent optical property; Image enhancement
资金
- Open Fund of the Key Laboratory of Marine Geology and Environment in Chinese Academy of Sciences [MGE2015KG02]
- Research Fund of State Key Laboratory of Ocean Engineering in Shanghai Jiao Tong University - China [1315, 1510]
- Research Fund of State Key Laboratory of Marine Geology in Tongji University - China [MGK1407]
- [15F15077]
- [13J10713]
- Grants-in-Aid for Scientific Research [15F15077] Funding Source: KAKEN
This paper describes a novel method for enhancing optical images using a weighted guided trigonometric filter and the camera's spectral properties in turbid water. Absorption, scattering, and artificial lighting are three major distortion issues in underwater optical imaging. Absorption permanently removes photons from the imaging path. Scattering is caused by large suspended particles found in turbid water, which redirect the angle of the photon path. Artificial lighting results in footprint effects, which cause vignetting distortion in the captured image. Our contributions include a novel deep-sea imaging method that compensates for the attenuation discrepancy along the propagation path, and an effective underwater scene enhancement scheme. The recovered images are characterized by a reduced noise level, better exposure of dark regions, and improved global contrast such that the finest details and edges are significantly enhanced. Our experiments showed that the average Peak Signal to Noise Ratio (PSNR) improved by at least 1 dB when compared with state-of-the-art-methods. (C) 2016 Elsevier Inc. All rights reserved.
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