A Hybrid Frequency-Space Approach for Shape Measurement by Shadow Moiré Technique with Carrier Fringe Pattern

2006 ◽  
Author(s):  
A. M. Siddiolo ◽  
L. D'Acquisto
Keyword(s):  
Fringe Pattern ◽  
Shape Measurement ◽  
Frequency Space ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Hybrid Frequency ◽  
Space Approach

Demodulation of Phase Shift Shadow Moiré Fringe Pattern by Orthonormalzing Method

2017 ◽  
Vol 46 (7) ◽  
pp. 712002
Author(s):  
杜虎兵 DU Hu-bing ◽  
颜菁菁 YAN Jing-jing
Keyword(s):  
Phase Shift ◽  
Fringe Pattern ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Moire Fringe ◽  
Moiré Fringe

An accurate method to calibrate shadow moiré measurement sensitivity

2019 ◽  
Vol 30 (12) ◽  
pp. 125021
Author(s):  
Wei Zhang ◽  
Fulong Zhu ◽  
Shenghuai Wang ◽  
Pengyan Lu ◽  
Xin Wu
Keyword(s):  
Accurate Method ◽  
Measurement Sensitivity ◽  
Shadow Moire ◽  
Shadow Moiré

Multi-STFT for adaptive SCPS phase determination

2009 ◽  
Vol 17 (4) ◽  
Author(s):  
R. Sitnik
Keyword(s):  
Fourier Transform ◽  
Carrier Phase ◽  
Fringe Pattern ◽  
Phase Shifting ◽  
Shape Measurement ◽  
Step Method ◽  
Phase Determination ◽  
3D Shape Measurement ◽  
Phase Calculation ◽  
Carrier Phase Shifting

AbstractThis paper presents a fast and reliable approach for phase modulo 2π-calculation from a single fringe pattern. It calculates correct phase values even for very complex and variable shape gradients based on a locally variable fringe period determined for the entire image. In the paper, a new two-step method for wrapped phase calculation is proposed. It is performed through the use of a method based on a multiple local fast Fourier transform for estimation of a local fringes period map and a 5-point spatial carrier phase shifting (SCPS) formula for phase modulo 2π-calculation. The described approach is verified by a correct demodulation of a real fringe pattern taken by a 3D-shape measurement system.

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