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Optical Engineering

Absolute phase technique for the Fourier transform method
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Paper Abstract

The phase-to-coordinate conversion is an important step for accurate 3-D shape measurement by use of structured light methods. We propose to use an absolute phase map in the Fourier transform method to achieve better accuracy in the phase-to-coordinate conversion. A cross-shaped marker is embedded in the fringe pattern that is projected onto the object. The position of the marker in the captured fringe image is detected and utilized to calculate the absolute phase map. For phase analysis of the fringe image, the marker is removed and the sinusoidal intensity distribution of the fringe pattern is restored before the forward and inverse Fourier transforms are applied. Experimental results of absolute phase retrieval and 3-D reconstruction are presented to show the feasibility of the proposed method.

Paper Details

Date Published: 1 April 2009
PDF: 7 pages
Opt. Eng. 48(4) 043609 doi: 10.1117/1.3122370
Published in: Optical Engineering Volume 48, Issue 4
Show Author Affiliations
Hong Guo, Stony Brook Univ. (United States)
Peisen S. Huang, Stony Brook Univ. (United States)

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