Optical Techniques for Regular Cross Sea Identification

Authors

  • Henrique Rapizo Universidade Federal do Rio de Janeiro; COPPE; Laboratório de Instrumentação Oceanográfica LIOc; Programa de Engenharia Naval e Oceânica, PEnO
  • Victor D'Ávila Universidade do Estado do Rio de Janeiro; Faculdade de Oceanografia FAOC
  • Nelson Violante-Carvalho Universidade Federal do Rio de Janeiro; COPPE; Laboratório de Instrumentação Oceanográfica LIOc; Programa de Engenharia Naval e Oceânica, PEnO
  • Uggo Pinho Petrobras; Segmento de Oceanografia Operacional OCEANOP
  • Jefferson Pereira Universidade Federal do Rio de Janeiro; COPPE; Laboratório de Instrumentação Oceanográfica LIOc; Programa de Engenharia Naval e Oceânica, PEnO
  • Carlos Eduardo Parente Universidade Federal do Rio de Janeiro; COPPE; Laboratório de Instrumentação Oceanográfica LIOc; Programa de Engenharia Naval e Oceânica, PEnO

DOI:

https://doi.org/10.11137/2014_2_195_205

Keywords:

Optical image processing, Surface gravity waves.

Abstract

A new optical technique is presented and applied to measure regular, bichromatic surface waves propagating in different directions in a tank. The method is based on the patterns of spatio-temporal variations of brightness over sequential frames. A single camera is employed, allowing a simple and straightforward configuration well-suited for operational applications, therefore avoiding the technical complications typical of stereoscopic measurements. The initial results are promising, with directions of propagation and wave periods well defined for each wave train.

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Published

2017-02-15

Issue

Vol. 37 No. 2 (2014)

Section

Article

License

This journal is licensed under a Creative Commons — Attribution 4.0 International — CC BY 4.0, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.