Results 31 to 40 of about 693,780 (338)

Improving Geometric Accuracy of 3D Printed Parts Using 3D Metrology Feedback and Mesh Morphing

open access: yesJournal of Manufacturing and Materials Processing, 2020
Additive manufacturing (AM), also known as 3D printing, has gained significant interest due to the freedom it offers in creating complex-shaped and highly customized parts with little lead time. However, a current challenge of AM is the lack of geometric
Moustapha Jadayel, Farbod Khameneifar
doaj   +1 more source

Generation of curved high-order meshes with optimal quality and geometric accuracy [PDF]

open access: yes, 2016
We present a novel methodology to generate curved high-order meshes featuring optimal mesh quality and geometric accuracy. The proposed technique combines a distortion measure and a geometric L2-disparity measure into a single objective function.
Roca Navarro, Francisco Javier   +2 more
core   +2 more sources

Landsat 8 Operational Land Imager On-Orbit Geometric Calibration and Performance

open access: yesRemote Sensing, 2014
The Landsat 8 spacecraft was launched on 11 February 2013 carrying the Operational Land Imager (OLI) payload for moderate resolution imaging in the visible, near infrared (NIR), and short-wave infrared (SWIR) spectral bands.
James Storey, Michael Choate, Kenton Lee
doaj   +1 more source

The structure of the atomic helium trimers: Halos and Efimov states [PDF]

open access: yes, 1998
The Faddeev equations for the atomic helium-trimer systems are solved numerically with high accuracy both for the most sophisticated realistic potentials available and for simple phenomenological potentials. An efficient numerical procedure is described.
A S Jensen   +12 more
core   +2 more sources

Geometric Accuracy Analysis of Regional Block Adjustment Using GF-7 Stereo Images without GCPs

open access: yesRemote Sensing, 2023
As an important means of improving positioning accuracy, block adjustment has been used in the improvement and assessment of accuracy for the Chinese Gaofen-7 (GF-7) satellite.
Xinming Tang   +3 more
doaj   +1 more source

On-Orbit Geometric Calibration Model and Its Applications for High-Resolution Optical Satellite Imagery

open access: yesRemote Sensing, 2014
On-orbit geometric calibration is a key technology to guarantee the geometric quality of high-resolution optical satellite imagery. In this paper, we present an approach for the on-orbit geometric calibration of high-resolution optical satellite imagery,
Mi Wang, Bo Yang, Fen Hu, Xi Zang
doaj   +1 more source

High-Quality UAV-Based Orthophotos for Cadastral Mapping: Guidance for Optimal Flight Configurations

open access: yesRemote Sensing, 2020
During the past years, unmanned aerial vehicles (UAVs) gained importance as a tool to quickly collect high-resolution imagery as base data for cadastral mapping. However, the fact that UAV-derived geospatial information supports decision-making processes
Claudia Stöcker   +3 more
doaj   +1 more source

A Novel Electrode Front-End Face Design to Improve Geometric Accuracy in Electrical Discharge Machining Process

open access: yesMetals, 2023
Electrical discharge machining (EDM) is one of the important machining processes to produce mold components. When using the EDM process, surface quality, processing time, accuracy, and electrode cost must be considered.
Shih-Ming Wang   +4 more
doaj   +1 more source

Virtual Rephotography: Novel View Prediction Error for 3D Reconstruction

open access: yes, 2016
The ultimate goal of many image-based modeling systems is to render photo-realistic novel views of a scene without visible artifacts. Existing evaluation metrics and benchmarks focus mainly on the geometric accuracy of the reconstructed model, which is ...
Beljan, Mate   +5 more
core   +1 more source

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