Results 31 to 40 of about 875,579 (253)

Research on laser center positioning under CV model segmentation

open access: yesFrontiers in Physics, 2022
Spot positioning accuracy is an important index of laser processing system and ranging system. When the laser spot is noisy or the gray level is not uniform, the positioning accuracy is easily affected. Aiming at the above problems, this paper proposes a
Xingchen Guo   +5 more
doaj   +1 more source

Estimation of Translation, Rotation, and Scaling between Noisy Images Using the Fourier–Mellin Transform [PDF]

open access: yes, 2009
In this paper we focus on extended Euclidean registration of a set of noisy images. We provide an appropriate statistical model for this kind of registration problems, and a new criterion based on Fourier-type transforms is proposed to estimate the ...
Gamboa, Fabrice   +2 more
core   +1 more source

A Robust Rigid Skeleton Extraction Method from Noisy Visual Hull Model

open access: yesInternational Journal of Advanced Robotic Systems, 2015
The existing skeleton extraction algorithms from a coarse and noisy model cannot achieve a satisfactory skeleton, let alone the joints' central position in a markerless motion capture system (e.g., a rigid skeleton).
Xiaojun Wu, YiXin Xu
doaj   +1 more source

On rules for stopping the conjugate gradient type methods in ill‐posed problems

open access: yesMathematical Modelling and Analysis, 2007
We consider stopping rules in conjugate gradient type iteration methods for solving linear ill‐posed problems with noisy data. The noise level may be known exactly or approximately or be unknown. We propose several new stopping rules, mostly for the case
Uno Hämarik, Reimo Palm
doaj   +1 more source

Novel deep learning approach for practical applications of indentation

open access: yesMaterials Today Advances, 2022
The instrumented indentation technique has been investigated to efficiently evaluate the mechanical responses of materials with few limitations on the shape and size of the specimen.
Yongju Kim   +6 more
doaj   +1 more source

ChitambarLab/vqo-nonlocality-noisy-quantum-networks: v0.1.0

open access: yes, 2022
Initial public release of supplementary codebase for "Variational Quantum Optimization of Nonlocality in Noisy Quantum ...
Brian Doolittle
core   +1 more source

Coded Downlink Multi-user MC-CDMA System using Transmitter Pre-processing: Performance Results

open access: yesIEEE Access, 2016
In this treatise, we evaluate the error-rate (ER) performance of turbo-coded multi-carrier code division multiple access scheme (MC-CDMA) for downlink (DL) transmission.
K. S. Vishvaksenan, P. T. Vasanth Raj
doaj   +1 more source

Extract feature curves on noisy triangular meshes

open access: yesGraphical Models, 2017
Abstract Feature curve is a powerful shape descriptor for a wide spectrum of applications, such as shape registration, geometry compression and surface reconstruction in CAD and reverse engineering. However, feature curve extraction from noisy data has been a challenging problem for decades. In this paper, we propose a robust algorithm for extracting
Hao Liu 0029   +4 more
openaire   +1 more source

Human perception faithful curve reconstruction based on persistent homology and principal curve

open access: yesGraphical Models
Reconstructing curves that align with human visual perception from a noisy point cloud presents a significant challenge in the field of curve reconstruction. A specific problem involves reconstructing curves from a noisy point cloud sampled from multiple
Yu Chen, Hongwei Lin, Yifan Xing
doaj   +1 more source

The Effect of Noise in Raman Spectra on the Reconstruction of the Concentration of Amino Acids in the Mixture by Multivariate Curve Resolution (MCR) Analysis

open access: yesJournal of Biomedical Photonics & Engineering, 2021
Changes in the concentration of free amino acids in biological tissues is a sign of impaired protein metabolism in patients with cancer. Recently, Raman spectroscopy has been used for early diagnostics of oncological diseases.
Irina A. Matveeva   +4 more
doaj   +1 more source

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