Results 41 to 50 of about 6,391,115 (351)

COMPARISON OF UAV IMAGERY-DERIVED POINT CLOUD TO TERRESTRIAL LASER SCANNER POINT CLOUD [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
A small unmanned aerial vehicle (UAV) with survey-grade GNSS positioning is used to produce a point cloud for topographic mapping and 3D reconstruction.
S. Peterson, J. Lopez, R. Munjy
doaj   +1 more source

Virtual Namesake Point Multi-Source Point Cloud Data Fusion Based on FPFH Feature Difference

open access: yesSensors, 2021
There are many sources of point cloud data, such as the point cloud model obtained after a bundle adjustment of aerial images, the point cloud acquired by scanning a vehicle-borne light detection and ranging (LiDAR), the point cloud acquired by ...
Li Zheng, Zhukun Li
doaj   +1 more source

3D point cloud video segmentation oriented to the analysis of interactions [PDF]

open access: yes, 2016
Given the widespread availability of point cloud data from consumer depth sensors, 3D point cloud segmentation becomes a promising building block for high level applications such as scene understanding and interaction analysis.
Casas Pla, Josep Ramon   +2 more
core   +1 more source

The Devils in the Point Clouds: Studying the Robustness of Point Cloud Convolutions

open access: yes, 2021
Recently, there has been a significant interest in performing convolution over irregularly sampled point clouds. Since point clouds are very different from regular raster images, it is imperative to study the generalization of the convolution networks more closely, especially their robustness under variations in scale and rotations of the input data ...
Li, Xingyi   +3 more
openaire   +2 more sources

Determinação do ponto de névoa em surfactantes não iônicos por espectroscopia de impedância elétrica

open access: yesQuímica Nova, 2010
In this paper, we analyze the use of electrical impedance spectroscopy applied to determination of cloud point. The slope of admittance measured at 100 kHz is reduced to temperature above the critical value which characterizes the phase transition, in a ...
Sandro Vagner de Lima   +1 more
doaj   +1 more source

Preparation and Characterization of New Tetra-Dentate N2O2 Schiff Base with Some of Metal Ions Complexes

open access: yesIndonesian Journal of Chemistry, 2021
This study describes preparation a new series of tetra-dentate N2O2 dinuclear complexes Cr(III), Co(II)and Cu(II) of the Schiff base 2-[5-(2-hydroxy-phenyl)-1,3,4-thiadiazol-2-ylimino]-methyl-naphthalen-1-ol], (LH2) derived from 1-hydroxy-naphthalene-2 ...
Naser Shaalan   +2 more
doaj   +1 more source

Consistent ICP for the registration of sparse and inhomogeneous point clouds [PDF]

open access: yes, 2016
In this paper, we derive a novel iterative closest point (ICP) technique that performs point cloud alignment in a robust and consistent way. Traditional ICP techniques minimize the point-to-point distances, which are successful when point clouds contain ...
Goeman, Werner   +3 more
core   +1 more source

SeedFormer: Patch Seeds based Point Cloud Completion with Upsample Transformer [PDF]

open access: yesEuropean Conference on Computer Vision, 2022
Point cloud completion has become increasingly popular among generation tasks of 3D point clouds, as it is a challenging yet indispensable problem to recover the complete shape of a 3D object from its partial observation.
Hao Zhou   +6 more
semanticscholar   +1 more source

Cold fl ow properties of palm oil biodiesel

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2014
The faulty performance of palm oil biodiesel at low temperatures constitutes its main quality drawback and limitation to use this alternative fuel for diesel engines either as a neat fuel or blended with conventional diesel fuel derived from petroleum ...
Pedro Nel Benjumea   +2 more
doaj   +1 more source

Orienting point clouds with dipole propagation [PDF]

open access: yesACM Transactions on Graphics, 2021
Establishing a consistent normal orientation for point clouds is a notoriously difficult problem in geometry processing, requiring attention to both local and global shape characteristics. The normal direction of a point is a function of the local surface neighborhood;
Metzer, Gal   +5 more
openaire   +5 more sources

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