Experimental investigations of the bed evolution in wave flumes: Performance of 2D and 3D optical systems

Foti, Enrico; Rabionet, Ivan Cáceres; Marini, Alberto; Musumeci, Rosaria Ester; Sánchez‐Arcilla, Agustín

doi:10.1016/j.coastaleng.2011.01.007

Cited by 17 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such an approach was followed by Foti et al . [] and Astruc et al . [], who projected a grid on the bed and then estimated the location of the grid points.…”

Section: Introductionmentioning

confidence: 99%

“…These techniques are capable of obtaining accurate, time‐resolved measurements of the bed. However, the use of structured light or targets increases the complexity and cost of the experimental setup [ Foti et al ., ]. In applications where the free surface is very rough and wavy, such as in the case of flows around hydraulic structures, the structured light cannot be projected through the free surface, and the complexity of the setup is further increased.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High‐resolution 3‐D monitoring of evolving sediment beds

Bouratsis

Diplas

Dancey

et al. 2013

Water Resources Research

View full text Add to dashboard Cite

[1] A new photogrammetric technique has been developed for monitoring the morphology of evolving stream beds. A pair of commercial cameras is used to record the evolution of the bed, and a computational approach that consists of a set of computer-vision and imageprocessing algorithms is employed to analyze the videos and reconstruct the instantaneous 3-D surface of the bed. Time-and space-resolved measurements are obtained to generate accurate representations of the bed. The required setup for the implementation of the technique is relatively simple and minimally intrusive. A thorough description of the algorithms that were used and detailed instructions for the implementation of the technique is provided. High-resolution measurements of a gravel bed in a clear-water, bridge scour experiment were carried out to demonstrate the operation and validate the capabilities of the technique. The new technique shows advantages compared to existing methods in terms of spatial resolution, temporal resolution, simplicity, and cost.

show abstract

“…Such an approach was followed by Foti et al . [] and Astruc et al . [], who projected a grid on the bed and then estimated the location of the grid points.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐resolution 3‐D monitoring of evolving sediment beds

Bouratsis

Diplas

Dancey

et al. 2013

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…Wang et al (2012) developed the CCD camera based on the modified planebased camera calibration method (MPCC) to investigate the sand bed and waveform measurement. The laboratory investigation of sand bed evolution was carried out in a nearshore zone by using video camera detection (Foti et al, 2011;Astruc et al, 2012;Palmsten and Holman, 2012). Chinnarasri and Viriyakijja (2014) applied the image processing method to experimentally investigate the performance of a rectangular box type of single and double floating breakwater in a wave flume.…”

Section: Introductionmentioning

confidence: 99%

Wave Flume Measurement Using Image Analysis

Viriyakijja

Chinnarasri

2015

Aquatic Procedia

View full text Add to dashboard Cite

Wave observation represented water surface elevation at a reference point is basic and essential data for ocean and coastal engineering that is mostly measured with traditional wave gauges, for instance capacitance, resistance and conductivity types. Therefore, accuracy and exactness are the most important aspects of data acquisition systems. In this study, we focus on the development of image processing techniques for wave measurement in a wave flume as a tool to replace traditional wave gauges, which are complicated to use, costly and intrusive. Recently, image processing techniques have been developed for utilization in various tasks. The main factors that influence the accuracy of these techniques are image quality, algorithm performance and exact calibration. Image processing techniques based on edge detection algorithms were used to measure waves in the laboratory with a camera. The experimental results showed the agreement of water surface elevation from both measurement methods. The average wave height and average wave period of regular wave obtained from the zero up-crossing analysis were different by less than 10% and 1% respectively compared with traditional wave gauges. Moreover, this algorithm can also measure irregular waves in hydraulic laboratories as well. Hence, this approach is a new, alternative tool for use in wave flume measurement, with good results.

show abstract

“…In these systems measurement points in the scour hole are identified using a grid of dots produced by a diffractive laser (Sumer et al 2013, Baglio et al 2001, or by using feature matching software (Raaijmakers et al 2012). Foti et al (2011) noted that sand surfaces are not ideal for feature matching and this can result in a reduction in the accuracy of the solution.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Three Techniques for Scour Depth Measurement: Photogrammetry, Echosounder Profiling and a Calibrated Pile

Porter

Simons

Harris

2014

Int. Conf. Coastal. Eng.

View full text Add to dashboard Cite

Laboratory studies form an integral part of scour research, yet there is no standard technique for monitoring scour depth development during testing. This paper investigates the advantages and disadvantages of a variety of techniques, and compares results from three methods: photogrammetry, an echosounder, and a calibrated pile. A novel system involving an underwater camera is presented. This produces results in close agreement with the other techniques, and has the advantage of providing accurate measurements over the full scour hole while at the same time enabling qualitative information to be gained from the photographs.

show abstract

Experimental investigations of the bed evolution in wave flumes: Performance of 2D and 3D optical systems

Cited by 17 publications

References 23 publications

High‐resolution 3‐D monitoring of evolving sediment beds

High‐resolution 3‐D monitoring of evolving sediment beds

Wave Flume Measurement Using Image Analysis

Comparison of Three Techniques for Scour Depth Measurement: Photogrammetry, Echosounder Profiling and a Calibrated Pile

Contact Info

Product

Resources

About