INVESTIGADORES
LANNUTTI Esteban DamiÁn
artículos
Título:
Detecting Glacier Surface Motion by Optical Flow
Autor/es:
LENZANO MARIA GABRIELA; ESTEBAN LANNUTTI; TOTH CHARLES; RIVERA ANDRÉS; LUIS LENZANO
Revista:
PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING
Editorial:
AMER SOC PHOTOGRAMMETRY
Referencias:
Año: 2018 vol. 84 p. 33 - 42
ISSN:
0099-1112
Resumen:
In this study, we assessed the feasibility of using optical flow,in particular, large displacement optical flow (LDOF) methodas a possible solution to obtain surface movement data toderive ice flow velocities in a glacier. Tests were carriedout at the Viedma Glacier, located at the South PatagoniaIcefield, Argentina, where terrestrial monoscopic imagesequences were acquired by a calibrated camera from April2014 until April 2016. As for preprocessing, the CorrelatedAnalysis method was implemented to avoid and minimizeerrors due to the measurable changes in lighting, shadows,clouds, and snow. The results show a flow field with amaximum surface velocity value of 3.5 m/d. The errors wereminimized by averaging the image sequence results basedon seasons, in which the Total Error Reconstruction yieldedfairly good mean accuracy (0.36 m/d). In summary, it wasdemonstrated that LDOF can provide accurate and robustsolution to detect daily changes in the glacier surface.
