Results 71 to 80 of about 2,155 (180)

Slope Superficial Displacement Monitoring by Small Baseline SAR Interferometry Using Data from L-band ALOS PALSAR and X-band TerraSAR: A Case Study of Hong Kong, China

Remote Sensing, 2014
Owing to the development of spaceborne synthetic aperture radar (SAR) platforms, and in particular the increase in the availability of multi-source (multi-band and multi-resolution) data, it is now feasible to design a surface displacement monitoring ...
Fulong Chen, Hui Lin, Xianzhi Hu
doaj   +1 more source

Quadriwave lateral shearing interferometric microscopy with wideband sensitivity enhancement for quantitative phase imaging in real time

Scientific Reports, 2017
Real-time quantitative phase imaging has tremendous potential in investigating live biological specimens in vitro. Here we report on a wideband sensitivity-enhanced interferometric microscopy for quantitative phase imaging in real time by employing two ...
Tong Ling, Jiabin Jiang, Rui Zhang, Yongying Yang   +3 more
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Digital-twin-driven unambiguous structured light 3D imaging with physics-aware learning

npj Nanophotonics
Temporal phase unwrapping (TPU) plays a pivotal role in resolving phase ambiguities in fringe projection profilometry (FPP) caused by surface discontinuities or spatially isolated features.
Yiheng Liu, Wenwu Chen, Jinyang Jiang, Shengqi Yu, Ziheng Jin, Xinsheng Li, Shijie Feng, Qian Chen, Chao Zuo   +8 more
doaj   +1 more source

Near Real-Time Monitoring of Large Gradient Nonlinear Subsidence in Mining Areas: A Hybrid SBAS-InSAR Method Integrating Robust Sequential Adjustment and Deep Learning

Remote Sensing
With the increasing availability of satellite monitoring data, the demand for storage and computational resources for updating the results of monitoring the surface subsidence in a mining area continues to rise.
Yuanjian Wang, Ximin Cui, Yuhang Che, Yuling Zhao, Peixian Li, Xinliang Kang, Yue Jiang   +6 more
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Deformation Monitoring for Mountain Excavation and City Construction Area in Yan’an New District by Improved MT-InSAR Method

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The increasing demand for land in the cities of Loess Plateau, China has intensified the conflict between people and land. Therefore, large-scale mountain excavation and city creation (MECC) projects have emerged in many densely populated cities, where ...
Guangrong Li, Chaoying Zhao, Bin Li, Ming Yan, Baohang Wang, Jianqi Lou, Najeebullah Kakar, Jiangbo Xi   +7 more
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Application of ESPI Based on FTP Quantitative Analysis in Airflow Field Testing

工程科学与技术, 2006
:ESPI was proposed to test airflow speckle shift. N frames of speckle patterns along temporal sequence were collected by CCD, phase field of correlated patterns were obtained after calculating the temporal correlated patterns using a FFT program, which ...
doaj  

A Robust Method for Selecting a High‐Quality Interferogram Subset in InSAR Surface Deformation Analysis

Geophysical Research Letters
The accuracy of Interferometric Synthetic Aperture Radar surface deformation solutions depends on the quality of the chosen interferogram subset. We present a method to select interferogram subsets based on unwrapping errors rather than temporal baseline
M. S. Zebker, J. Chen
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Three-Shot Dual-Frequency Fringe Scheme Based on Spatial Computer-Generated Moiré Fringe

Photonics
A highly robust dual-frequency hierarchical temporal phase unwrapping (DHTPU) based on the novel spatial computer-generated Moiré profilometry (SCGMP) is proposed. The method requires only three patterns: a high-frequency fringe to provide robust surface
Hechen Zhang, Jin Zhou, Dan Jia, Jinlong Huang, Jing Yuan   +4 more
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Two-plus-two fringe projection profilometry based on phase-shifted coding

Scientific Reports
In fringe projection profilometry based on temporal phase unwrapping, determining a fringe order map commonly requires a large number of fringes. To reduce the fringe number, this paper proposes a concise absolute phase retrieval algorithm just by ...
Hechen Zhang, Jin Zhou, Dan Jia, Jinlong Huang, Jin Yuan   +4 more
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Shape measurements using temporal phase unwrapping

, 2000
This licentiate thesis is devoted to shape measurements using two different optical methods. The first one is a classical triangulation method, which uses projected fringes. The second one is a new interferometric method, which uses wavelength scanning. Both are whole field measuring methods.
openaire   +1 more source