scholarly journals 2D Points Curve Reconstruction Survey and Benchmark

2021 ◽  
Vol 40 (2) ◽  
pp. 611-632
Author(s):  
S. Ohrhallinger ◽  
J. Peethambaran ◽  
A. D. Parakkat ◽  
T. K. Dey ◽  
R. Muthuganapathy
Keyword(s):  
Curve Reconstruction

scholarly journals Discrete analytical curve reconstruction without patches

2005 ◽  
Vol 23 (2) ◽  
pp. 191-202 ◽  
Author(s):  
Isabelle Sivignon ◽  
Rodolphe Breton ◽  
Florent Dupont ◽  
Eric Andrès
Keyword(s):  
Curve Reconstruction ◽  
Analytical Curve

scholarly journals Section Curve Reconstruction and Mean-Camber Curve Extraction of a Point-Sampled Blade Surface

PLoS ONE ◽  
2014 ◽  
Vol 9 (12) ◽  
pp. e115471 ◽  
Author(s):  
Wen-long Li ◽  
He Xie ◽  
Qi-dong Li ◽  
Li-ping Zhou ◽  
Zhou-ping Yin
Keyword(s):  
Blade Surface ◽  
Curve Reconstruction ◽  
Section Curve

3D Highway Curve Reconstruction From Mobile Laser Scanning Point Clouds

2020 ◽  
Vol 21 (11) ◽  
pp. 4762-4772 ◽  
Author(s):  
Zongliang Zhang ◽  
Jonathan Li ◽  
Yulan Guo ◽  
Chenhui Yang ◽  
Cheng Wang
Keyword(s):  
Laser Scanning ◽  
Point Clouds ◽  
Curve Reconstruction

Validation of Dispersion Curve Reconstruction Techniques for the A0 and S0 Modes of Lamb Waves

2014 ◽  
Vol 14 (07) ◽  
pp. 1450024 ◽  
Author(s):  
Lina Draudvilienė ◽  
Renaldas Raišutis ◽  
Egidijus Žukauskas ◽  
Audrius Jankauskas
Keyword(s):  
Phase Velocity ◽  
Structural Changes ◽  
Lamb Waves ◽  
High Sensitivity ◽  
Dispersion Curves ◽  
Curve Reconstruction ◽  
Informative Signal ◽  
Zero Crossing ◽  
Reconstruction Methods ◽  
Phase Velocity Dispersion

The properties of ultrasonic Lamb waves, such as relatively small attenuation and high sensitivity to structural changes of the object being investigated, allow performing of non-destructive testing of various elongated structures like pipes, cables, etc. Due to the dispersion effect of Lamb waves, a waveform of the received informative signal is usually distorted, elongated and overlapping in the time domain. Therefore, in order to investigate objects using the ultrasonic Lamb waves and to reconstruct the dispersion curves, it is necessary to know the relationship between frequency, phase and group velocities and thickness of the plate. The zero-crossing technique for measurement of phase velocity of Lamb waves (the A0 and S0 modes) has been investigated using modelled dispersed signals and experimental signals obtained for an aluminium plate having thickness of 2 mm. A comparison between two reconstruction methods of Lamb wave phase velocity dispersion curves, namely, the two-dimensional fast Fourier transform (2D-FFT) and zero-crossing technique, along with the theoretical (analytical) dispersion curves is presented. The results indicate that the proposed zero-crossing method is suitable for use in reconstruction of dispersion curves in the regions affected by strong dispersion, especially for the A0 mode.

scholarly journals ANALYSIS OF LUMBOSACRAL LORDOSIS USING STANDING LATERAL RADIOGRAPHS THROUGH CURVE RECONSTRUCTION

2002 ◽  
Vol 14 (04) ◽  
pp. 149-156 ◽  
Author(s):  
RUEY-MO LIN ◽  
RONG-SHEAN LEE ◽  
YING-MING HUANG ◽  
SHOU-I CHEN ◽  
CHIN-YIN YU
Keyword(s):  
Age Groups ◽  
Lumbosacral Spine ◽  
Reconstruction Method ◽  
Lumbar Curve ◽  
Curve Reconstruction ◽  
Practical Applications ◽  
Geometric Characteristics ◽  
Gender And Age ◽  
Lumbosacral Lordosis ◽  
Lower Lumbar

The consensus of the normal magnitude of lumbosacral curve has not been achieved. The Cobb's angle cannot depict the whole contour of this curve. For practical applications, a clearer image of these curves and their aging changes should be further investigated. This study aimed to provide a more consolidate concept of normal lumbosacral curves for clinician through a computerized reconstruction method. Standing lateral radiographs of lumbosacral spine in 82 normal adults were used for reconstructing the sagittal lumbosacral curves. The geometric characteristics of these curves according to the gender and age groups were studied. Using standing lateral radiographs, reconstruction of the lumbosacral curves was performed through digitization, programming and computation. These curves and related parameters were normalized and averaged for analyzing the differences of gender and age. The most anteriorward and horizontal vertebrae usually occurred on the L4 and L3 in any gender and age groups. The sacral inclination angle did not change obviously with the increasing ages. A tendency of L1 shifting backward was noted in the age groups of 40 to 60 and above 60 years old. The sagittal lumbosacral curves can be easily reconstructed by digitizing lateral radiographs, The aging changes of lumbosacral curves could be qualitatively described as the flattening of lower lumbar curve and the rearward inclination of upper lumbar curve. The changes occurred obviously above 40 years old. Although individual variations existed, the aging changes and the geometric characteristics such as the most anteriorward or horizontal vertebrae could be used as an important guideline during therapy or surgical correction.

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