scholarly journals Motion-induced error reduction by combining Fourier transform profilometry with phase-shifting profilometry

2016 ◽  
Vol 24 (20) ◽  
pp. 23289 ◽  
Author(s):  
Beiwen Li ◽  
Ziping Liu ◽  
Song Zhang
Keyword(s):  
Fourier Transform ◽  
Error Reduction ◽  
Phase Shifting ◽  
Fourier Transform Profilometry

Non-phase-shifting Fourier transform profilometry using single grating pattern and object image

Optik ◽  
2016 ◽  
Vol 127 (19) ◽  
pp. 7565-7571 ◽  
Author(s):  
Jaroon Wongjarern ◽  
Joewono Widjaja ◽  
Porntip Chuamchaitrakool ◽  
Panomsak Meemon
Keyword(s):  
Fourier Transform ◽  
Phase Shifting ◽  
Object Image ◽  
Grating Pattern ◽  
Fourier Transform Profilometry

3D Profile Variety Measurement of Pectoral Fin in Fish Fast Start

2011 ◽  
Vol 83 ◽  
pp. 280-284
Author(s):  
Ming Jiang ◽  
Shu Zhang ◽  
Xiao Yuan He
Keyword(s):  
Fourier Transform ◽  
High Speed ◽  
Kinetic Characteristic ◽  
Three Dimensional ◽  
Pectoral Fin ◽  
Fourier Transform Profilometry ◽  
Fast Start ◽  
Fringe Patterns ◽  
3D Information ◽  
3D Profile

Fast-starts are brief, sudden accelerations used by fish during predator-prey encounters. In this paper, a three-dimensional (3D) test and analysis method is critical to understand the function of the pectoral fin during maneuvers. An experiment method based on Fourier Transform Profilometry for 3D pectoral fin profile variety during fish maneuvers is proposed. This method was used in a carp fast-start during prey. Projecting the moiré fringes onto a carp pectoral fin it will produce the deformed fringe patterns contain 3D information. A high speed camera captures these time-sequence images. By Fourier transform, filter, inverse Fourier transform and unwrap these phase maps in 3D phase space, the complex pectoral fin profile variety were really reconstructed. The present study provides a new method to quantify the analysis of kinetic characteristic of the pectoral fin during maneuvers.

Dynamic microscopic 3D shape measurement based on marker-embedded Fourier transform profilometry

2018 ◽  
Vol 57 (4) ◽  
pp. 772 ◽  
Author(s):  
Yan Hu ◽  
Qian Chen ◽  
Yuzhen Zhang ◽  
Shijie Feng ◽  
Tianyang Tao ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Shape Measurement ◽  
3D Shape ◽  
3D Shape Measurement ◽  
Fourier Transform Profilometry

scholarly journals An Error-Reduction Method for Temporal Phase Unwrapping Based on Double Three-Step Phase-Shifting and Least-Squares Fitting

2012 ◽  
Vol 6-7 ◽  
pp. 76-81
Author(s):  
Yong Liu ◽  
Ding Fa Huang ◽  
Yong Jiang
Keyword(s):  
Least Squares ◽  
Reduction Method ◽  
Intermediate Phase ◽  
Error Reduction ◽  
Phase Unwrapping ◽  
Phase Shifting ◽  
Surface Measurement ◽  
Acquisition Time ◽  
Least Squares Fitting ◽  
Temporal Phase

Phase-shifting interferometry on structured light projection is widely used in 3-D surface measurement. An investigation shows that least-squares fitting can significantly decrease random error by incorporating data from the intermediate phase values, but it cannot completely eliminate nonlinear error. This paper proposes an error-reduction method based on double three-step phase-shifting algorithm and least-squares fitting, and applies it on the temporal phase unwrapping algorithm using three-frequency heterodyne principle. Theoretical analyses and experiment results show that this method can greatly save data acquisition time and improve the precision.

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