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Open AccessArticle

Wave-Tracking in the Surf Zone Using Coastal Video Imagery with Deep Neural Networks

1
Korea Institute of Ocean Science and Technology, Ansan 49111, Korea
2
School of Computer Science and Engineering, Kyungpook National University, Daegu 41566, Korea
3
Deltares, Boussinesqweg 1, 2629 HV Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(3), 304; https://doi.org/10.3390/atmos11030304
Received: 14 February 2020 / Revised: 11 March 2020 / Accepted: 17 March 2020 / Published: 21 March 2020
(This article belongs to the Special Issue Waves and Wave Climate Analysis and Modeling)
In this paper, we propose a series of procedures for coastal wave-tracking using coastal video imagery with deep neural networks. It consists of three stages: video enhancement, hydrodynamic scene separation and wave-tracking. First, a generative adversarial network, trained using paired raindrop and clean videos, is applied to remove image distortions by raindrops and to restore background information of coastal waves. Next, a hydrodynamic scene of propagated wave information is separated from surrounding environmental information in the enhanced coastal video imagery using a deep autoencoder network. Finally, propagating waves are tracked by registering consecutive images in the quality-enhanced and scene-separated coastal video imagery using a spatial transformer network. The instantaneous wave speed of each individual wave crest and breaker in the video domain is successfully estimated through learning the behavior of transformed and propagated waves in the surf zone using deep neural networks. Since it enables the acquisition of spatio-temporal information of the surf zone though the characterization of wave breakers inclusively wave run-up, we expect that the proposed framework with the deep neural networks leads to improve understanding of nearshore wave dynamics. View Full-Text
Keywords: coastal wave-tracking; coastal video imagery; video enhancement; hydrodynamic scene separation; image registration; deep neural networks coastal wave-tracking; coastal video imagery; video enhancement; hydrodynamic scene separation; image registration; deep neural networks
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Kim, J.; Kim, J.; Kim, T.; Huh, D.; Caires, S. Wave-Tracking in the Surf Zone Using Coastal Video Imagery with Deep Neural Networks. Atmosphere 2020, 11, 304.

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