Phase unwrapping algorithm based on fringe density analysis in Fourier transform profilometry

Xianyu Su; Lian Xue

doi:10.1117/12.403883

10 October 2000 Phase unwrapping algorithm based on fringe density analysis in Fourier transform profilometry

Xianyu Su, Lian Xue

Proceedings Volume 4222, Process Control and Inspection for Industry; (2000) https://doi.org/10.1117/12.403883
Event: Optics and Optoelectronic Inspection and Control: Techniques, Applications, and Instruments, 2000, Beijing, China

Abstract

A new phase unwrapping algorithm based on fringe frequency analysis in Fourier Transform Profilometry (FTP) is presented. By the frequency weighted filtering, the analysis of fringe density is converted into the analysis of fringe modulation. And based on ordering this filtered fringe modulation, a more optimized phase unwrapping path can be found out. The consequent phase unwrapping path is always along the direction from an area in which local spatial frequency is less further from the fundamental frequency to one in which local spatial frequency is more further from the fundamental frequency. The experiment shows that the new phase unwrapping algorithm is reasonable and effective. Even in the worse case the error is limited, if there is any, to local minimum areas.

Citation Download Citation

Xianyu Su and Lian Xue "Phase unwrapping algorithm based on fringe density analysis in Fourier transform profilometry", Proc. SPIE 4222, Process Control and Inspection for Industry, (10 October 2000); https://doi.org/10.1117/12.403883

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