Classification of terrestrial laser scanner point clouds: A comparison of methods for landslide monitoring from mathematical surface approximation

G Kermarrec, Z Yang, D Czerwonka-Schröder - Remote Sensing, 2022 - mdpi.com
Terrestrial laser scanners (TLS) are contact-free measuring sensors that record dense point
clouds of objects or scenes by acquiring coordinates and an intensity value for each point …

The variance inflation factor to account for correlations in likelihood ratio tests: deformation analysis with terrestrial laser scanners

G Kermarrec, M Lösler, S Guerrier, S Schön - Journal of Geodesy, 2022 - Springer
The measurement noise of a terrestrial laser scanner (TLS) is correlated. Neglecting those
correlations affects the dispersion of the parameters when the TLS point clouds are …

Deformation analysis using b-spline surface with correlated terrestrial laser scanner observations—A bridge under load

G Kermarrec, B Kargoll, H Alkhatib - Remote Sensing, 2020 - mdpi.com
The choice of an appropriate metric is mandatory to perform deformation analysis between
two point clouds (PC)—the distance has to be trustworthy and, simultaneously, robust …

[HTML][HTML] Analysis of the displacements of pipeline overpasses based on geodetic monitoring results

R Shults, A Annenkov, G Seitkazina… - Geodesy and …, 2022 - Elsevier
There are many approaches to address geospatial monitoring of pipeline overpasses,
among which the most widespread methods are terrestrial laser scanning and total station …

ILRS reference point determination using close range photogrammetry

M Lösler, C Eschelbach, T Klügel, S Riepl - Applied Sciences, 2021 - mdpi.com
A global geodetic reference system (GGRS) is realized by physical points on the Earth's
surface and is referred to as a global geodetic reference frame (GGRF). The GGRF is …

Uncertainty modelling of laser scanning point clouds using machine-learning methods

J Hartmann, H Alkhatib - Remote Sensing, 2023 - mdpi.com
Terrestrial laser scanners (TLSs) are a standard method for 3D point cloud acquisition due
to their high data rates and resolutions. In certain applications, such as deformation analysis …

Elementary error model applied to terrestrial laser scanning measurements: Study case arch dam kops

G Kerekes, V Schwieger - Mathematics, 2020 - mdpi.com
All measurements are affected by systematic and random deviations. A huge challenge is to
correctly consider these effects on the results. Terrestrial laser scanners deliver point clouds …

On estimating the Hurst parameter from least-squares residuals. Case study: Correlated terrestrial laser scanner range noise

G Kermarrec - Mathematics, 2020 - mdpi.com
Many signals appear fractal and have self-similarity over a large range of their power
spectral densities. They can be described by so-called Hermite processes, among which the …

A point cloud filtering method based on anisotropic error model

M Ozendi, D Akca, H Topan - The Photogrammetric Record, 2023 - Wiley Online Library
Many modelling applications require 3D meshes that should be generated from
filtered/cleaned point clouds. This paper proposes a methodology for filtering of terrestrial …

The stochastic model for Global Navigation Satellite Systems and terrestrial laser scanning observations: A proposal to account for correlations in least squares …

G Kermarrec, I Neumann, H Alkhatib… - Journal of Applied …, 2019 - degruyter.com
The best unbiased estimates of unknown parameters in linear models have the smallest
expected mean-squared errors as long as the residuals are weighted with their true variance …