Characterization of Sun Glitter Statistics in Ocean Video

Rainey, Katie; Hallenborg, Eric

doi:10.21236/ada590050

Cited by 3 publications

(1 citation statement)

References 82 publications

(115 reference statements)

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“…It could also be due to the fact that some spectral bands, in particular those near 4000 nm, are affected by bright reflective sources, such as sun glint, during daylight hours. This is a known issue in remote sensing of water surfaces, and has been investigated by many authors (e.g., Rainey and Hallenborg 2013). Some techniques have also been suggested to reduce this effect (e.g., Kay et al, 2009), but they have not been applied here.…”

Section: Daytime and Night Time Sequencesmentioning

confidence: 99%

Application of multi-window maximum cross-correla-tion to the mediterranean sea circulation by using MODIS data

Doronzo¹,

Taddei²,

Brandini³

2017

Satell Oceanogr Meteorol

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Application of multi-window maximum cross-correlation to the mediterranean sea circulation by using MODIS data. © 2017 Bartolomeo Doronzo, et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 10 RESEARCH ARTICLEApplication of multi-window maximum cross-correlation to the mediterranean sea circulation by using MODIS data Abstract: In a previous study an improved Maximum Cross-Correlation technique, called Multi-Window MaximumCross-Correlation (MW-MCC), was proposed, and applied to noise-free synthetic images in order to show its potential and limits in oceanographic applications. In this work, instead, the application of MW-MCC to high resolution MODIS images, and its capability to provide useful and realistic results for ocean currents, is studied.When applied to real satellite images, the MW-MCC is subject to cloud cover and image quality problems. As a consequence the number of useful MODIS images is greatly reduced. However, for every MODIS image, multiple spectral bands are available, and it is possible to apply the MW-MCC algorithm to the same scene as many times as the number of these bands, increasing the possibility of finding valid current vectors.Moreover, the comparison among the results from different spectral bands allows to verify both the consistency of the computed current vectors and the validity of using a spectral band as a good tracer for the ocean circulation.Due to the lack of systematic current measurements in the area considered, it has been not possible to perform an ex-

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Section: Daytime and Night Time Sequencesmentioning

confidence: 99%

Application of multi-window maximum cross-correla-tion to the mediterranean sea circulation by using MODIS data

Doronzo¹,

Taddei²,

Brandini³

2017

Satell Oceanogr Meteorol

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Nearshore Wave Transformation Domains from Video Imagery

Andriolo¹

2019

JMSE

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Within the nearshore area, three wave transformation domains can be distinguished based on the wave properties: shoaling, surf, and swash zones. The identification of these distinct areas is relevant for understanding nearshore wave propagation properties and physical processes, as these zones can be related, for instance, to different types of sediment transport. This work presents a technique to automatically retrieve the nearshore wave transformation domains from images taken by coastal video monitoring stations. The technique exploits the pixel intensity variation of image acquisitions, and relates the pixel properties to the distinct wave characteristics. This allows the automated description of spatial and temporal extent of shoaling, surf, and swash zones. The methodology was proven to be robust, and capable of spotting the three distinct zones within the nearshore, both cross-shore and along-shore dimensions. The method can support a wide range of coastal studies, such as nearshore hydrodynamics and sediment transport. It can also allow a faster and improved application of existing video-based techniques for wave breaking height and depth-inversion, among others.

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Sun Glints and Underwater Caustics in Remote Sensing of Seas and Oceans

Gardashov,

Gardashov

2024

jour

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The Sun glints that are observed on the water surface have different radiances, shapes, and color shades, depending on the positions of the Sun and the observer, the water surface statement, and the transparency of the water and atmosphere. The texture, radiance, and color characteristics of Sun glints carry information about the state of the water and atmosphere. Therefore, Sun glints play an important role in remote sensing of seas and oceans, being a useful signal in some problems and noise in others. Bright stripes (underwater caustics) on the bottom of the water basin that are caused by the waves are also an indicator of the water surface shape. The application of the wave theory of light is used to study the intensity distribution in the vicinity of the caustic (i. e., where the geometric-optical approximation is inapplicable), which arises when light is refracted on a wavy water surface.A formula, which determines the parameters of the waves from the width of the caustic zone is obtained. The correctness of the method has been verified by experiments carried out in the pool. Also, here we give a brief overview of our investigations related to sun glints and underwater caustics.

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Characterization of Sun Glitter Statistics in Ocean Video

Cited by 3 publications

References 82 publications

Application of multi-window maximum cross-correla-tion to the mediterranean sea circulation by using MODIS data

Application of multi-window maximum cross-correla-tion to the mediterranean sea circulation by using MODIS data

Nearshore Wave Transformation Domains from Video Imagery

Sun Glints and Underwater Caustics in Remote Sensing of Seas and Oceans

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