Results 161 to 170 of about 2,155 (180)

Temporal phase unwrapping for fringe projection profilometry aided by recursion of Chebyshev polynomials

Applied Optics, 2017
This paper presents a temporal phase-unwrapping method for fringe projection profilometry. With it, a sequence of phase-shifting fringe patterns is projected onto the measured object for getting the wrapped phase map and achieving a high measurement resolution, and an additional sequence corresponding to Chebyshev polynomials is used for determining ...
Shuo, Xing, Hongwei, Guo
openaire   +2 more sources

Shape measurement of discontinuous objects using projected fringes and temporal phase unwrapping

Proceedings. International Conference on Recent Advances in 3-D Digital Imaging and Modeling (Cat. No.97TB100134), 2002
Temporal phase unwrapping is a method of analyzing fringe patterns in which the fringe phase, /spl Phi/, at each pixel is measured and unwrapped as a function of time, t. We propose a method for improving the signal-to-noise ratio of the total phase change by incorporating data from the intermediate phase values.
Henrik O. Saldner, Jonathan M. Huntley
openaire   +1 more source

Flexible error-reduction method for shape measurement by temporal phase unwrapping: phase averaging method

Applied Optics, 2012
Temporal phase unwrapping is an important method for shape measurement in structured light projection. Its measurement errors mainly come from both the camera noise and nonlinearity. Analysis found that least-squares fitting cannot completely eliminate nonlinear errors, though it can significantly reduce the random errors.
Liu, Yong, Huang, Dingfa, Jiang, Yong
openaire   +2 more sources

A comparative study on temporal phase unwrapping methods in high-speed fringe projection profilometry

Optics and Lasers in Engineering, 2021
Xiaoyu He, Qian Kemao, Kemao Qian
exaly  

A novel 2+1 three-dimensional measurement for temporal phase unwrapping

Optics Communications, 2023
Minghang Li, Yiping Cao
openaire   +1 more source

Temporal phase-unwrapping in fringe projection profilometry: Increasing the accuracy with equidistant long time-steps sampling

Optics and Lasers in Engineering, 2023
Jesus Villa, Gustavo A Rodriguez-Reveles, Ismael De La Rosa   +2 more
exaly  

Dual-Frequency Spatio-Temporal Phase Unwrapping

ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
Shuo Du, Qin Zou 0001, Chi Chen 0002, Bisheng Yang   +3 more
openaire   +1 more source

An improved temporal phase unwrapping based on super-grayscale multi-frequency grating projection

Optics and Lasers in Engineering, 2022
Yiping Cao, Yingying Wan, Haihua An
exaly  

A novel phase-shifting profilometry to realize temporal phase unwrapping simultaneously with the least fringe patterns

Optics and Lasers in Engineering, 2022
Haitao Wu, Yiping Cao, Haihua An
exaly  

Scale-insensitive property of the temporal phase unwrapping in fringe profilometry applications

Optik, 2022
A Davila, J A Rayas
exaly