Quality-guided phase unwrapping for the modified Fourier transform method

Hong Guo; Peisen Huang

doi:10.1117/12.827952

17 June 2009 Quality-guided phase unwrapping for the modified Fourier transform method

Hong Guo, Peisen Huang

Proceedings Volume 7389, Optical Measurement Systems for Industrial Inspection VI; 73890B (2009) https://doi.org/10.1117/12.827952
Event: SPIE Europe Optical Metrology, 2009, Munich, Germany

Abstract

In this paper, a quality-guided phase unwrapping method is proposed for a modified Fourier transform method, which utilizes a fringe image and a flat image. The proposed method takes advantage of the additional information provided by the flat image to calculate the visibility of the fringe pattern, which is difficult to obtain in the conventional Fourier transform method. The phase unwrapping process includes two steps. First, the pixels with unreliable phase values in the wrapped phase map are masked out. Then, visibility is chosen as a quality index to assist the quality-guided unwrapping. Experimental results show that the proposed method is an effective method to unwrap complex surface's phase map generated from dense fringe patterns.

Citation Download Citation

Hong Guo and Peisen Huang "Quality-guided phase unwrapping for the modified Fourier transform method", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73890B (17 June 2009); https://doi.org/10.1117/12.827952

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