Title of article :
Image-based correlation of Laser Scanning point cloud time series for landslide monitoring
Author/Authors :
Travelletti، نويسنده , , Julien and Malet، نويسنده , , Jean-Philippe and Delacourt، نويسنده , , Christophe، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
18
From page :
1
To page :
18
Abstract :
Very high resolution monitoring of landslide kinematics is an important aspect for a physical understanding of the failure mechanisms and for quantifying the associated hazard. In the last decade, the potential of Terrestrial Laser Scanning (TLS) to monitor slow-moving landslides has been largely demonstrated but accurate processing methods are still needed to extract useful information available in point cloud time series. This work presents an approach to measure the 3D deformation and displacement patterns from repeated TLS surveys. The method is based on the simplification of a 3D matching problem in a 2D matching problem by using a 2D statistical normalized cross-correlation function. The computed displacement amplitudes are compared to displacements (1) calculated with the classical approach of Iterative Closest Point and (2) measured from repeated dGPS observations. The performance of the method is tested on a 3 years dataset acquired at the Super-Sauze landslide (South French Alps). The observed landslide displacements are heterogeneous in time and space. Within the landslide, sub-areas presenting different deformation patterns (extension, compression) are detected by a strain analysis. It is demonstrated that pore water pressure changes within the landslide is the main controlling factor of the kinematics.
Keywords :
terrestrial laser scanning , Point clouds , Landslide , Image correlation , Kinematics , strain analysis
Journal title :
International Journal of Applied Earth Observation and Geoinformation
Serial Year :
2014
Journal title :
International Journal of Applied Earth Observation and Geoinformation
Record number :
2379642
Link To Document :
بازگشت