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Proceedings Paper

Unwrapping phase map by estimating regions containing phase jumps
Author(s): Feng Qian; Xiangzhao Wang; Zhenjun Peng; Xuefeng Wang
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Paper Abstract

We present herewith a phase unwrapping technique by estimation of regions containing 2π phase jumps based on their phase-distribution features. The more the neighbors around a pixel have phase values near π and -π, and the smaller the number difference between the neighbors near π and -π, the more possibly the pixel locates near a phase jump. The pixels with high possibility forms the phase-jump regions, which can then be eliminated by compensating the pixels with a multiply of 2π to minimize the phase difference between them and their neighbors. After removing phase jumps, one can utilize ordinary filtering operations to postprocess the noisy unwrapped phase map. Computer simulation and experimental results from the surface profile measurements of a transparent plate are presented.

Paper Details

Date Published: 20 September 2002
PDF: 9 pages
Proc. SPIE 4927, Optical Design and Testing, (20 September 2002); doi: 10.1117/12.471440
Show Author Affiliations
Feng Qian, Shanghai Institute of Optics and Fine Mechanics (China)
Xiangzhao Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Zhenjun Peng, Shanghai Institute of Optics and Fine Mechanics (China)
Xuefeng Wang, Shanghai Institute of Optics and Fine Mechanics (China)

Published in SPIE Proceedings Vol. 4927:
Optical Design and Testing
Zhicheng Weng; Jose M. Sasian; Yongtian Wang, Editor(s)

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