Sea state from single optical images: A methodology to derive wind-generated ocean waves from cameras, drones and satellites

Remote Sensing
By: , and 

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Abstract

Sea state is a key variable in ocean and coastal dynamics. The sea state is either sparsely measured by wave buoys and satellites or modelled over large scales. Only a few attempts have been devoted to sea state measurements covering a large domain; in particular its estimation from optical images. With optical technologies becoming omnipresent, optical images offer incomparable spatial resolution from diverse sensors such as shore-based cameras, airborne drones (unmanned aerial vehicles/UAVs), or satellites. Here, we present a standalone methodology to derive the water surface elevation anomaly induced by wind-generated ocean waves from optical imagery. The methodology was tested on drone and satellite images and compared against ground truth. The results show a clear dependence on the relative azimuth view angle in relation to the wave crest. A simple correction is proposed to overcome this bias. Overall, the presented methodology offers a practical way of estimating ocean waves for a wide range of applications.
Publication type Article
Publication Subtype Journal Article
Title Sea state from single optical images: A methodology to derive wind-generated ocean waves from cameras, drones and satellites
Series title Remote Sensing
DOI 10.3390/rs13040679
Volume 13
Issue 4
Year Published 2021
Language English
Publisher MDPI
Contributing office(s) St. Petersburg Coastal and Marine Science Center
Description 679, 8 p.
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