Direct phase estimation from phase differences using fast elliptic partial differential equation solvers
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (US)
Obtaining robust phase estimates from phase differences is a problem common to several areas of importance to the optics and signal-processing communities. Specific areas of application include speckle imaging and interferometry, adaptive optics, compensated imaging, and coherent imaging such as synthetic-aperture radar. We derive in a concise form the equations describing the phase-estimation problem, relate these equations to the general form of elliptic partial differential equations, and illustrate results of reconstructions on large {ital M} by {ital N} grids, using existing, published, and readily available FORTRAN subroutines.
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5293842
- Journal Information:
- Optics Letters; (USA), Journal Name: Optics Letters; (USA) Vol. 14:20; ISSN 0146-9592; ISSN OPLED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440800* -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
DIFFERENTIAL EQUATIONS
EQUATIONS
IMAGE PROCESSING
ITERATIVE METHODS
MEASURING INSTRUMENTS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PHASE SHIFT
PROCESSING
RADAR
RANGE FINDERS
SYNTHETIC-APERTURE RADAR
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
DIFFERENTIAL EQUATIONS
EQUATIONS
IMAGE PROCESSING
ITERATIVE METHODS
MEASURING INSTRUMENTS
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
PHASE SHIFT
PROCESSING
RADAR
RANGE FINDERS
SYNTHETIC-APERTURE RADAR