Anno di pubblicazione: 2014
[Mol.SCORE2014] M. G. Molfetta, A. Morea, G. Preziosa, “A new approach for measuring short water waves through stereo image sequences and artificial markers”. First WORKSHOP on the State of the art and Challenges Of Research Efforts @POLIBA (SCORE@POLIBA), December 3-5, 2014, Politecnico di Bari, Italy. ISBN: 978-88-492-2966-0.
We present an innovative approach to obtain, with a single instrument, measurements of several wave motion parameters of interest in physical models of marine hydraulics. The system, realized and tested in a laboratory environment, is based on stereo computer-vision techniques. A number of colored floating markers with low inertia are evenly distributed in the field of view of two synchronized movie-cameras, whose frame cover large portions of the hydraulic model. Specific computer-vision procedures are implemented to analyze acquired data. The system captures wave data simultaneously in a high number of points of the wave field and overcomes some limitations of the commonly used probes, limited in numbers, more intrusive and in need of frequent calibration. The system achieved good measurement’s accuracy within 5% in terms of significant wave height and 1% in terms of frequency spectrum, in comparison to the traditional calibration probes.
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