Synchronous phase-extraction technique and its applications

Y.Y. Hung; Shouhong Tang; Guofan Jin; Quiming Zhu

doi:10.1117/12.51124

1 January 1991 Synchronous phase-extraction technique and its applications

Y.Y. Hung, Shouhong Tang, Guofan Jin, Quiming Zhu

Proceedings Volume 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection; (1991) https://doi.org/10.1117/12.51124
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

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.

Citation Download Citation

Y.Y. Hung, Shouhong Tang, Guofan Jin, and Quiming Zhu "Synchronous phase-extraction technique and its applications", Proc. SPIE 1332, Optical Testing and Metrology III: Recent Advances in Industrial Optical Inspection, (1 January 1991); https://doi.org/10.1117/12.51124

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