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Proceedings Paper

Synchronous phase-extraction technique and its applications
Author(s): Y.Y. Hung; Shouhong Tang; Guofan Jin; Quiming Zhu
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Paper Abstract

A new technique for phase extraction of a fringe pattern is presented and verified in this paper. The technique makes use of the orthogonality of the trigonometric functions. It acquires the wrapped phase of a fringe pattern at a pixel point with the use of intensity values at that pixel point and its neighbors. It is capable of obtaining the unwrapped phase of a fringe pattern at every pixel point automatically provided that the phase of the fringe pattern is monotonically increasing. In contrast to the Fast Fourier transform (FFT) based phase measurement technique, this technique not only eliminates the difficulty of choosing a passing-band in the frequency domain but also provides great flexibility for processing an arbitrary number of pixel points at every row of the image.

Paper Details

Date Published: 1 January 1991
PDF: 10 pages
Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); doi: 10.1117/12.51124
Show Author Affiliations
Y.Y. Hung, Oakland Univ. (United States)
Shouhong Tang, Oakland Univ. (United States)
Guofan Jin, Oakland Univ. (China)
Quiming Zhu, Oakland Univ. (United States)


Published in SPIE Proceedings Vol. 1332:
Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection
Chander Prakash Grover, Editor(s)

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