Results 31 to 40 of about 75,493 (303)

Assessment of Registration Methods for Cranial 3D Modelling

open access: yesProceedings, 2019
Three-dimensional (3D) models are a useful tool for cranial deformation analysis in infants. The registration of the head 3D models to a known coordinate system is vital for the obtainment of parameters and indexes that quantify deformation.
Inés Barbero-García, José Luis Lerma
doaj   +1 more source

Accuracy Improvement Method of a 3D Laser Scanner Based on the D-H Model

open access: yesShock and Vibration, 2021
A three-dimensional (3D) laser scanner with characteristics such as acquiring huge point cloud data and noncontact measurement has revolutionized the surveying and mapping industry. Nonetheless, how to guarantee the 3D laser scanner precision remains the
Kai Chen   +3 more
doaj   +1 more source

Standard method for microCT-based additive manufacturing quality control 2: Density measurement

open access: yesMethodsX, 2018
MicroCT is best known for its ability to detect and quantify porosity or defects, and to visualize its 3D distribution. However, it is also possible to obtain accurate volumetric measurements from parts – this can be used in combination with the part ...
Anton du Plessis   +6 more
doaj   +1 more source

Standard method for microCT-based additive manufacturing quality control 1: Porosity analysis

open access: yesMethodsX, 2018
MicroCT is a well-established technique that is used to analyze the interior of objects non-destructively, and it is especially useful for void or porosity analysis.
Anton du Plessis   +6 more
doaj   +1 more source

AN AUTOMATIC PROCEDURE FOR COMBINING DIGITAL IMAGES AND LASER SCANNER DATA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
Besides improving both the geometry and the visual quality of the model, the integration of close-range photogrammetry and terrestrial laser scanning techniques directs at filling gaps in laser scanner point clouds to avoid modeling errors ...
W. Moussa, M. Abdel-Wahab, D. Fritsch
doaj   +1 more source

A Magnetic Laser Scanner for Endoscopic Microsurgery [PDF]

open access: yes2017 IEEE International Conference on Robotics and Automation (ICRA), 2020
Laser scanners increase the quality of the laser microsurgery enabling fast tissue ablation with less thermal damage. Such technology is part of state-of-the-art freebeam surgical laser systems. However, laser scanning has not been incorporated to fiber-based lasers yet.
Alperen Acemoglu, Leonardo S. Mattos
openaire   +3 more sources

Standard method for microCT-based additive manufacturing quality control 3: Surface roughness

open access: yesMethodsX, 2018
The use of microCT of 10 mm coupon samples produced by AM has the potential to provide useful information of mean density and detailed porosity information of the interior of the samples.
Anton du Plessis   +6 more
doaj   +1 more source

Evaluation of Three-Dimensional Photogrammetric Model from Low-Cost Digital Camera Applied in the Cultural Heritage Registry [PDF]

open access: yesAnuário do Instituto de Geociências, 2020
As tecnologias como o Laser Scanner se destacam no âmbito de registros arquitetônicos. Laser Scanner representa um equipamento extremamente preciso, que possibilita a criação de modelos tridimensionais por meio da coleta de milhares de pontos. Por outro
George Deroco Martins   +3 more
doaj   +1 more source

Design of a Liquid‐Driven Laser Scanner with Low Voltage Based on Liquid‐Infused Membrane

open access: yesAdvanced Intelligent Systems, 2023
Laser energy is commonly used in tissue ablation, wound suturing, and other precise manipulations during surgery. However, currently available laser scanners require further improvements in terms of miniaturization, driving voltage, and stability to ...
Chunqi Zhang   +5 more
doaj   +1 more source

Combining optical satellite data and airborne laser scanner data for vegetation classification [PDF]

open access: yes, 2011
The aim of this study was to investigate to which degree the accuracy of vegetation classification could be improved by combining optical satellite data and airborne laser scanner (ALS) data, compared with using satellite data only.
Nordkvist, Karin,   +15 more
core   +1 more source

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