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2-D weighted least-squares phase unwrapping

Patent ·
OSTI ID:869930
 [1];  [2]
  1. Placitas, NM
  2. Albuquerque, NM
+ Show Author Affiliations

Weighted values of interferometric signals are unwrapped by determining the least squares solution of phase unwrapping for unweighted values of the interferometric signals; and then determining the least squares solution of phase unwrapping for weighted values of the interferometric signals by preconditioned conjugate gradient methods using the unweighted solutions as preconditioning values. An output is provided that is representative of the least squares solution of phase unwrapping for weighted values of the interferometric signals.

Research Organization:
AT & T CORP
DOE Contract Number:
AC04-76DP00789
Assignee:
U.S. Department of Energy (Washington, DC)
Patent Number(s):
US 5424743
OSTI ID:
869930
Country of Publication:
United States
Language:
English

References (3)

Robust two-dimensional weighted and unweighted phase unwrapping that uses fast transforms and iterative methods journal January 1994
Matrix formulation of the reconstruction of phase values from phase differences journal January 1979
Direct phase estimation from phase differences using fast elliptic partial differential equation solvers journal January 1989

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Related Subjects

/342/
2-d
conjugate
determining
gradient
interferometric
interferometric signals
least-squares
methods
output
phase
phase unwrapping
preconditioned
preconditioning
provided
representative
signals
solution
solutions
squares
unweighted
unwrapped
unwrapping
values
weighted
weighted values