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Proceedings Paper

Frequency-shifting method for phase retrieval from fringe patterns
Author(s): Haixia Wang; Kemao Qian; Wenjing Gao
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Paper Abstract

A novel frequency-shifting method for phase retrieval from fringe patterns is proposed. It needs two fringe patterns. In the second fringe pattern, a low frequency carrier is introduced. The low carrier frequency is used to open only fringe patches near critical points rather than the whole fringe pattern. The windowed Fourier ridges algorithm is used to retrieve the phase, which is able to characterize the density of the fringe patterns so that critical points can be recognized. The method is verified by a simulation example.

Paper Details

Date Published: 3 October 2008
PDF: 6 pages
Proc. SPIE 7155, Ninth International Symposium on Laser Metrology, 71550N (3 October 2008); doi: 10.1117/12.814522
Show Author Affiliations
Haixia Wang, Nanyang Technological Univ. (Singapore)
Kemao Qian, Nanyang Technological Univ. (Singapore)
Wenjing Gao, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 7155:
Ninth International Symposium on Laser Metrology
Chenggen Quan; Anand Asundi, Editor(s)

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