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Deformation analysis using B-spline surface with correlated terrestrial laser scanner observations-a bridge under load

Kermarrec, Gaël; Kargoll, Boris; Alkhatib, Hamza (Basel : MDPI AG, 2020)

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 against measurement noise, which may be correlated ...
Finite element analysis based on a parametric model by approximating point clouds

Xu, Wei; Neumann, Ingo (Basel : MDPI AG, 2020)

Simplified models are widely applied in finite element computations regarding mechanical and structural problems. However, the simplified model sometimes causes many deviations in the finite element analysis (FEA) of ...
Model selection for parametric surfaces approximating 3d point clouds for deformation analysis

Zhao, Xin; Kargoll, Boris; Omidalizarandi, Mohammad; Xu, Xiangyang; Alkhatib, Hamza (Basel : MDPI AG, 2018)

Deformation monitoring of structures is a common application and one of the major tasks of engineering surveying. Terrestrial laser scanning (TLS) has become a popular method for detecting deformations due to high precision ...
Robust Spatial Approximation of Laser Scanner Point Clouds by Means of Free-form Curve Approaches in Deformation Analysis

Bureick, Johannes; Alkhatib, Hamza; Neumann, Ingo (Berlin : De Gruyter, 2016)

In many geodetic engineering applications it is necessary to solve the problem of describing a measured data point cloud, measured, e. g. by laser scanner, by means of free-form curves or surfaces, e. g., with B-Splines ...
TLS-based composite structure deformation analysis validated with laser tracker

Xu, Xiangyang; Bureick, Johannes; Yang, Hao; Neumann, Ingo (Amsterdam : Elsevier, 2017)

This paper focuses on the adjustment of B-spline approximation to terrestrial laser scanning (TLS) data and its contribution to deformation analysis of composite arched structures. The deformation of an arch structure under ...

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