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Application of an autonomous robot for the collection of nearshore topographic and hydrodynamic measurements

Wübbold, Frauke; Hentschel, Matthias; Vousdoukas, Michalis I.; Wagner, Bernardo (Reston : American Society of Civil Engineers, 2012)

Beach topographic and hydrodynamic measurements are essential for coastal geology and engineering studies as well as sustainable coastal management. Standard approaches involve either time-consuming manual data acquisition ...
The benefit of 3D laser scanning technology in the generation and calibration of FEM models for health assessment of concrete structures

Yang, Hao; Xu, Xiangyang; Neumann, Ingo (Basel : MDPI AG, 2014)

Terrestrial laser scanning technology (TLS) is a new technique for quickly getting three-dimensional information. In this paper we research the health assessment of concrete structures with a Finite Element Method (FEM) ...
Comparison of target-and mutual informaton based calibration of terrestrial laser scanner and digital camera for deformation monitoring

Omidalizarandi, Mohammad; Neumann, Ingo (Göttingen : Copernicus GmbH, 2015)

In the current state-of-the-art, geodetic deformation analysis of natural and artificial objects (e.g. dams, bridges,.) is an ongoing research in both static and kinematic mode and has received considerable interest by ...
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 ...
Enabling second harmonic generation as a contrast mechanism for optical projection tomography (OPT) and scanning laser optical tomography (SLOT)

Nolte, Lena; Antonopoulos, Georgios C.; Rämisch, Lisa; Heisterkamp, Alexander; Ripken, Tammo; Meyer, Heiko (Washington, DC : Optical Society of America, 2018)

Volumetric imaging of connective tissue provides insights into the structure of biological tissue. Second harmonic generation (SHG) microscopy has become a standard method to image collagen rich tissue like skin or cornea. ...
Evaluation and optimization of parameters in the measurement for airborne scanner using response surface method

Zhang, Ding-bang; Zhang, Yi; Shen, Zheng; Cheng, Tao; Bai, Yongtao (London : SAGE Publications Ltd., 2019)

This paper aims to evaluate the working parameters and try to make an optimized use of the parameters which affect the measurement accuracy of airborne scanner. First, based on response surface method, three levels of ...
Evaluation of a Novel Radar Based Scanning Method

Fritsche, Paul; Wagner, Bernardo (New York, NY : Hindawi Publishing Corporation, 2016)

The following paper introduces a novel scanning method for mapping and localization purposes in mobile robotics. Our method is based on a rotating monostatic radar network, which determines the positions of objects around ...
High-precision 3D object capturing with static and kinematic terrestrial laser scanning in industrial applications-approaches of quality assessment

Stenz, Ulrich; Hartmann, Jens; Paffenholz, Jens-André; Neumann, Ingo (Basel : MDPI AG, 2020)

Abstract Terrestrial laser scanning is used in many disciplines of engineering. Examples include mobile mapping, architecture surveying, archaeology, as well as monitoring and surveillance measurements. For most of the ...
How significant are differences obtained by neglecting correlations when testing for deformation: A real case study using bootstrapping with terrestrial laser scanner observations approximated by b-spline surfaces

Kermarrec, Gaël; Paffenholz, Jens-André; Alkhatib, Hamza (Basel : MDPI AG, 2019)

B-spline surfaces possess attractive properties such as a high degree of continuity or the local support of their basis functions. One of the major applications of B-spline surfaces in engineering geodesy is the least-square ...
Influence of laser power on the shape of single tracks in scanner based laser wire cladding

Barroi, A.; Gonçalves, D.A.; Hermsdorf, J.; Kaierle, S.; Overmeyer, L. (Amsterdam : Elsevier B.V., 2016)

The shape of the cladding tracks is extremely important for producing layers or structures by adding them sequently. This paper shows the influence of the laser power of a diode laser in the range of 500 to 1000 W on the ...
Integrity and collaboration in dynamic sensor networks

Schön, Steffen; Brenner, Claus; Alkhatib, Hamza; Coenen, Max; Dbouk, Hani; Garcia-Fernandez, Nicolas; Fischer, Colin; Heipke, Christian; Lohmann, Katja; Neumann, Ingo; Nguyen, Uyen; Paffenholz, Jens-André; Peters, Torben; Rottensteiner, Franz; Schachtschneider, Julia; Sester, Monika; Sun, Ligang; Vogel, Sören; Voges, Raphael; Wagner, Bernardo (Basel : MDPI AG, 2018)

Global Navigation Satellite Systems (GNSS) deliver absolute position and velocity, as well as time information (P, V, T). However, in urban areas, the GNSS navigation performance is restricted due to signal obstructions ...
Investigation of second harmonic generation and multispectral imaging as new contrast mechanisms in scanning laser optical tomography

Nolte, Lena; Antonopoulos, Georgios C.; Heisterkamp, Alexander; Ripken, Tammo; Meyer, Heiko (Bellingham, WA : S P I E - International Society for Optical Engineering, 2018)

Scanning laser optical tomography (SLOT) is a 3D imaging technique, based on the principle of computed tomography to visualize samples up to magnitude of several centimeters. Intrinsic contrast mechanisms as absorption, ...
On the sensitivity of the parameters of the intensity-based stochastic model for terrestrial laser scanner. Case study: B-spline approximation

Kermarrec, Gael; Alkhatib, Hamza; Neumann, Ingo (Basel : MDPI AG, 2018)

For a trustworthy least-squares (LS) solution, a good description of the stochastic properties of the measurements is indispensable. For a terrestrial laser scanner (TLS), the range variance can be described by a power law ...
Optimisation of the calibration process of a k-tls based multi-sensor-system by genetic algorithms

Hartmann, J.; Von Gösseln, I.; Schild, N.; Dorndorf, A.; Paffenholz, J.-A.; Neumann, I. (Göttingen : Copernicus GmbH, 2019)

In recent years, the requirements in the industrial production of elongated objects, e.g., aircraft, have been increased. An essential aspect of the production process is the 3D object detection as well as the qualitative ...
Optimization of cyanine dye stability and analysis of FRET interaction on DNA microarrays

Haar, Marcel von der; Heuer, Christopher; Pähler, Martin; Haar, Kathrin von der; Lindner, Patrick; Scheper, Thomas; Stahl, Frank (Basel : MDPI AG, 2016)

The application of DNA microarrays for high throughput analysis of genetic regulation is often limited by the fluorophores used as markers. The implementation of multi-scan techniques is limited by the fluorophores’ ...
Point-based and model-based geolocation analysis of airborne laser scanning data

Sefercik, Umut Gunes; Buyuksalih, Gurcan; Jacobsen, Karsten; Alkan, Mehmet (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)

Airborne laser scanning (ALS) is one of the most effective remote sensing technologies providing precise three-dimensional (3-D) dense point clouds. A large-size ALS digital surface model (DSM) covering the whole Istanbul ...
Quantitative 3d reconstruction from scanning electron microscope images based on affine camera models

Töberg, Stefan; Reithmeier, Eduard (Basel : MDPI, 2020)

Scanning electron microscopes (SEMs) are versatile imaging devices for the micro-and nanoscale that find application in various disciplines such as the characterization of biological, mineral or mechanical specimen. Even ...
Registration of terrestrial laser scanning data using planar patches and image data

Dold, Christoph; Brenner, Claus ([Wechselnde Verlagsorte] : ISPRS, 2006)

The fully automatic registration of terrestrial scan data is still a major topic for many research groups. Existent methods used in commercial software often use artificial markers which are placed in the scene and measured ...
Robust and automatic modeling of tunnel structures based on terrestrial laser scanning measurement

Xu, Xiangyang; Yang, Hao; Kargoll, Boris (London : SAGE Publications Ltd., 2019)

The terrestrial laser scanning technology is increasingly applied in the deformation monitoring of tunnel structures. However, outliers and data gaps in the terrestrial laser scanning point cloud data have a deteriorating ...
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 ...

Now showing items 1-20 of 22

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