Motion-induced error reduction for phase shifting profilometry using double-shot-in-single-illumination technique

2019 ◽  
Author(s):  
Vignesh Suresh ◽  
Yajun Wang ◽  
Beiwen Li
Keyword(s):  
Error Reduction ◽  
Phase Shifting

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.

Effective error reduction method in phase-shifting interferometer

2000 ◽  
Author(s):  
Yingjie Yu ◽  
Chunlong Wei ◽  
Mingyi Chen ◽  
Hongwei Guo
Keyword(s):  
Reduction Method ◽  
Error Reduction ◽  
Phase Shifting

Motion induced error reduction methods for phase shifting profilometry: A review

2021 ◽  
Vol 141 ◽  
pp. 106573
Author(s):  
Lei Lu ◽  
Vignesh Suresh ◽  
Yi Zheng ◽  
Yajun Wang ◽  
Jiangtao Xi ◽  
...  
Keyword(s):  
Error Reduction ◽  
Phase Shifting ◽  
Reduction Methods

Encultured minds, not error reduction minds

2020 ◽  
Vol 43 ◽  
Author(s):  
Robert Mirski ◽  
Mark H. Bickhard ◽  
David Eck ◽  
Arkadiusz Gut
Keyword(s):  
Free Energy ◽  
Error Reduction ◽  
Energy Principle ◽  
Free Energy Principle ◽  
Current Article

Abstract There are serious theoretical problems with the free-energy principle model, which are shown in the current article. We discuss the proposed model's inability to account for culturally emergent normativities, and point out the foundational issues that we claim this inability stems from.

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