Simple Techniques for Retrieval of Wind Wave Periods and Directions from Optical Images Sequences in Wave Tanks

Rapizo, H.; d'Avila, V.; Violante-Carvalho, N.; Pinho, U.; Parente C.E., and Nascimento, F., 2016. Simple techniques for retrieval of wind wave periods and directions from optical images sequences in wave tanks. Optical techniques are potentially suitable for overcoming some of the limitations...

Full description

Saved in:
Bibliographic Details
Published in:Journal of coastal research 2016-09, Vol.32 (5), p.1227-1234
Main Authors: Rapizo, Henrique, d'Avila, Victor, Violante-Carvalho, Nelson, Pinho, Uggo, Parente, Carlos Eduardo, Nascimento, Fabio
Format: Article
Language:English
Subjects:
Cameras
Coupling
Digital cameras
Feasibility
Indoor environments
Light
Lighting
measurement of waves
Methods
Optical properties
optical techniques
Outdoor
Propagation
Radio transmission
Seas
Signal reflection
Steepness
Stereoscopy
Tanks
TECHNICAL COMMUNICATIONS
Time series
Wave propagation
Wave reflection
Waves
Wind waves
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Rapizo, H.; d'Avila, V.; Violante-Carvalho, N.; Pinho, U.; Parente C.E., and Nascimento, F., 2016. Simple techniques for retrieval of wind wave periods and directions from optical images sequences in wave tanks. Optical techniques are potentially suitable for overcoming some of the limitations faced by single-point sensors, like buoys, in retrieving spatial properties of wind-generated waves. However, most of the approaches that have been addressed in the literature employ complex configurations that use a coupling system between cameras, making its implementation difficult. This article describes simple techniques for measuring the period and direction of multimodal, regular waves, employing a single, commonly available camera. Furthermore, there is no special requirement for light conditions, making its implementation feasible, in both indoor and outdoor environments. Several tests were conducted in a multidirectional tank, varying the steepness and direction of the waves. The optical measurements were in good agreement, especially for waves from moderate to greater steepness. The techniques described here could be employed as a preliminary step before tackling more-complex configurations, for instance, as a priori information on the main wave modes.
ISSN:0749-0208
1551-5036
DOI:10.2112/JCOASTRES-D-15-00072.1