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Underwater optical cameras are widely used for security monitoring in ocean, such as earthquake prediction and tsunami alarming. Optical cameras recognize objects for autonomous underwater vehicles and provide security protection for sea-floor networks. However, there are many issues for underwater optical imaging, such as forward and backward scattering, light absorption, and sea snow. Many underwater...
Vision-based underwater navigation and object detection requires robust computer vision algorithms to operate in turbid water. Many conventional methods aimed at improving visibility in low turbid water. In this paper, we propose a novel contrast enhancement measurement for different enhancement methods' assessment. As a rule to compare the performance of different image enhancement algorithms, a...
The deep-sea tripod systems designed and built at the U.S. Geological Survey (USGS) Pacific Coastal and Marine Science Center (PCMSC) in Santa Cruz, California. They were recovered in late September 2014 after spending about half a year collecting data on the floor of the South China Sea. The Free-Ascending Tripod (FAT) was deployed at 2,100 meters water depth—roughly 10 times as deep as most tripods...
We present a novel method of enhancing shallow ocean optical images or videos using weighted guided median filter and wavelength properties. Absorption, scattering and color distortion are three major distortion issues for underwater optical imaging. Light rays traveling through water are scattered and absorbed depending on the wavelength. Scattering is caused by large suspended particles, as in turbid...
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