Dense three-dimensional point continuous measurement based on triple line-scan cameras

2021 ◽  
Author(s):  
Ruiying Liao ◽  
Luyao Ma ◽  
Linghui Yang ◽  
Jigui Zhu
Keyword(s):  
Continuous Measurement ◽  
Three Dimensional ◽  
Triple Line ◽  
Line Scan

scholarly journals Continuous measurement of optical surfaces using a line-scan interferometer with sinusoidal path length modulation

2014 ◽  
Vol 22 (24) ◽  
pp. 29787 ◽  
Author(s):  
Holger Knell ◽  
Sören Laubach ◽  
Gerd Ehret ◽  
Peter Lehmann
Keyword(s):  
Path Length ◽  
Continuous Measurement ◽  
Line Scan ◽  
Optical Surfaces

Three-dimensional line-scan imaging system for robotic measurement

1996 ◽  
Author(s):  
Richard S. Petty ◽  
Simon X. Godber ◽  
J. Paul O. Evans ◽  
McDonald Robinson
Keyword(s):  
Imaging System ◽  
Three Dimensional ◽  
Line Scan

Diffusion Tensor Imaging and 3D Tractography of the Cervical Spinal Cord Using the ECG-Gated Line-Scan Technique

2007 ◽  
Vol 20 (5) ◽  
pp. 574-579 ◽  
Author(s):  
M. Hori ◽  
K. Ishigame ◽  
S. Aoki ◽  
H. Kumagai ◽  
T. Araki
Keyword(s):  
Spinal Cord ◽  
Clinical Symptoms ◽  
Diffusion Tensor ◽  
Cervical Spinal Cord ◽  
Three Dimensional ◽  
Acquisition Time ◽  
Clinical Use ◽  
Ecg Gating ◽  
Line Scan

Diffusion tensor (DT) magnetic resonance (MR) imaging in addition to conventional MR images provide valuable information on the brain. This study compared line scan DT imaging with and without the ECG-gating technique to estimate clinical usefulness of the line scan diffusion tensor image (LSDTI) with ECG-gating in evaluating spinal cord diseases in vivo. First, five healthy volunteers participated in the comparison study. LSDWI was performed in three to five sagittal sections with a pulsed-field-gradient diffusion preparation pulse employing two different b-values (0 and 700 s/mm2) along six directions. Apparent diffusion coefficient (ADC) maps and fractional anisotropy (FA) were calculated and three-dimensional tract reconstruction and color schemes of the spinal cord were obtained. Image quality and the acquisition time of each LSDTI were compared. Second, LSDTI with ECG-gating was performed in eighteen patients with cervical spinal cord disorders and evaluated by two neuroradiologists. Images with the ECG-gated technique were all superior to those without ECG—gating. Mean extended time for LSDTI with ECG-gating was approximately two minutes. In clinical use, the ADC and FA of spinal cord in patients with cervical spondylotic myelopathy statically changed. Moreover, demonstration of fibers was correlated with clinical symptoms. ECG-gating technique is preferable to LSDTI. The ADC and FA measurements and 3D fiber tracking of LSDTI with ECG-gating are promising methods to estimate cervical spinal cord pathology in clinical use.

Three-dimensional line-scan intensity ratio sensing

1992 ◽  
Author(s):  
Israel Amir ◽  
Frank P. Higgins
Keyword(s):  
Intensity Ratio ◽  
Three Dimensional ◽  
Line Scan

The Investigation of Arch Model Acting in Mass-Flow Hoppers

2012 ◽  
Vol 508 ◽  
pp. 135-140 ◽  
Author(s):  
Jie Guo ◽  
Alan W. Roberts ◽  
Jan Dirk Prigge
Keyword(s):  
Mass Flow ◽  
Three Dimensional ◽  
Surface Profile ◽  
Experimental Results ◽  
Arch Model ◽  
Test Results ◽  
Arch Models ◽  
Plane Flow ◽  
Line Scan ◽  
Laser Line Scan

This paper presents the experimental results of mass-flow hopper arch geometry investigation, which was conducted using a variable geometry plane-flow bin. The cohesive arches formed under different critical outlet openings and hopper half-angles were measured using a 360° two-dimensional laser line scan system. This system was employed to obtain the complete surface profile of each arch across the width of the outlet by moving the rotating laser along the total length of the outlet. The test results were analyzed using Matlab, adopting stationary wavelet transformation de-noising to decrease the signal noise generated during the testing process. The geometric data for each single line scan was smoothed and combined to present a three-dimensional arch surface profile shown to be in good agreement with the observed experimental arch profiles. The angle η at the intersection of the arch with the hopper walls was then calculated by running a Matlab program and a new angle η' is introduced to the arch shape study. The detailed results are discussed in the paper. Arch geometry models, such as the parabolic arc and circular arc arch models developed, respectively, by Walker [ and Enstad [ are reviewed and their relevance is discussed based on the experimental results presented in this paper.

Sign in / Sign up

Export Citation Format

Share Document