TY - JOUR
T1 - Elaboración de modelos 3D de diferentes morfologías y escalas utilizando técnicas Structure-from-Motion y fotografías terrestres
AU - Ferro, Vito
AU - Caraballo Arias, Nathalie Almaru
AU - Conoscenti, Christian
AU - Di Stefano, Costanza
AU - Gómez-Gutiérrez, Álvaro
AU - De Matías, Javier
AU - Blasco Sanjosé, José Juan
AU - Berenguer-Sempere, Fernando
AU - Berenguer-Sempere, Fernando
AU - Gómez-Gutiérrez, Álvaro
AU - Schnabel, Susanne
AU - Angileri, Silvia Eleonora
PY - 2016
Y1 - 2016
N2 - Three-dimensional photo-reconstruction methods based on the use of Structure-from-Motion (SfM) and MultiView-Stereo techniques (MVS) are tested together for measuring, monitoring and quantifying three different geomorphological features: i) the Corral del Veleta rock glacier (Granada, Spain), ii) calanchi type badlands (Sicily, Italy) and iii) five small gully headcuts (Cáceres, Spain). Results about the accuracy, usefulness and applicability of these techniques are presented here. In order to quantify the accuracy, the root mean square error of the control points used during the georeferencing procedure and the average absolute distance between each point cloud and a benchmark cloud, calculated with the cloud-to-cloud and the multiscale model-to-model comparison techniques, were used. For the cases i) and iii) the benchmark point clouds were acquired by means of a terrestrial laser scanner, while for the case ii) a digital elevation model obtained by means of classical photogrammetry applied to aerial pictures taken by an unmanned aerial vehicle was used as benchmark. The results of these analyses showed centimetre-level accuracies with average distances to the benchmark models ranging from 0.01 m to 0.42 m. The estimated accuracies show that models are suitable for estimating geomorphic changes only in the case of gully headcuts. In the case of the glacier and the badlands, the obtained models are not suitable to estimate changes at an annual scale, but could be useful to produce high-quality maps or estimating morphometric parameters.
AB - Three-dimensional photo-reconstruction methods based on the use of Structure-from-Motion (SfM) and MultiView-Stereo techniques (MVS) are tested together for measuring, monitoring and quantifying three different geomorphological features: i) the Corral del Veleta rock glacier (Granada, Spain), ii) calanchi type badlands (Sicily, Italy) and iii) five small gully headcuts (Cáceres, Spain). Results about the accuracy, usefulness and applicability of these techniques are presented here. In order to quantify the accuracy, the root mean square error of the control points used during the georeferencing procedure and the average absolute distance between each point cloud and a benchmark cloud, calculated with the cloud-to-cloud and the multiscale model-to-model comparison techniques, were used. For the cases i) and iii) the benchmark point clouds were acquired by means of a terrestrial laser scanner, while for the case ii) a digital elevation model obtained by means of classical photogrammetry applied to aerial pictures taken by an unmanned aerial vehicle was used as benchmark. The results of these analyses showed centimetre-level accuracies with average distances to the benchmark models ranging from 0.01 m to 0.42 m. The estimated accuracies show that models are suitable for estimating geomorphic changes only in the case of gully headcuts. In the case of the glacier and the badlands, the obtained models are not suitable to estimate changes at an annual scale, but could be useful to produce high-quality maps or estimating morphometric parameters.
UR - http://hdl.handle.net/10447/227795
UR - http://recyt.fecyt.es/index.php/CUGEO/article/download/cyg.v30i1-2.39594/pdf_28
M3 - Article
VL - 30
SP - 23
EP - 35
JO - Cuaternario y Geomorfologia
JF - Cuaternario y Geomorfologia
SN - 0214-1744
ER -