Paper Title:
Least Squares Phase Unwrapping Algorithm Based on Topographic Factors
  Abstract

The phase of complex signals is wrapped since it can only be measured modulo-2; unwrapping searches for the 2-combinations that minimize the discontinuity of the unwrapped phase, as only the unwrapped phase can be analyzed and interpreted by further processing. Weighted least squares phase unwrapping algorithm could avoid errors transmission in the whole phase images, but it could not avoid defect and overlay of interference fringes caused by topographic factors. Therefore, a new phase unwrapping and weights choosing method based on local phase frequency estimate of topographic factors was presented. Experiments show it is an efficient phase unwrapping method which well overcome the defect of under-estimate slopes by least squares algorithm, and has higher accuracy and stability than other methods.

  Info
Periodical
Chapter
Chapter 8: Measurement
Edited by
Paul P. Lin and Chunliang Zhang
Pages
1876-1879
DOI
10.4028/www.scientific.net/AMM.105-107.1876
Citation
W. K. Liu, G. L. Liu, X. Q. Zhang, "Least Squares Phase Unwrapping Algorithm Based on Topographic Factors", Applied Mechanics and Materials, Vols. 105-107, pp. 1876-1879, 2012
Online since
September 2011
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Price
$32.00
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