Pakiet: snaphu (2.0.7-1) [non-free]

[ Pakiet źródłowy: snaphu  ]

Statistical-Cost, Network-Flow Algorithm for 2D Phase Unwrapping

Two-dimensional phase unwrapping is the process of recovering unambiguous phase data from a 2-D array of phase values known only modulo 2pi rad.

There are many applications, like Magnetic Resonance Imaging (MRI), Synthetic Aperture Radar (SAR), fringe pattern analysis, tomography and spectroscopy, which as part of their fundamental operation depend upon the extraction of a phase signal from their input image. Usually the phase is available in a form that suffers from 2-pi phase jumps due to the use of the mathematical arctangent function, which produces an inherently wrapped output. This wrapped phase is unusable until the phase discontinuities are removed.

SNAPHU is an implementation of the Statistical-cost, Network-flow Algorithm for Phase Unwrapping particularly suitable for SAR interferometry applications. This algorithm poses phase unwrapping as a maximum a posteriori probability (MAP) estimation problem, the objective of which is to compute the most likely unwrapped solution given the observable input data. Because the statistics relating the input data to the solution depend on the measured quantity, SNAPHU incorporates three built-in statistical models, for topography data, deformation data, and smooth generic data. The posed optimization problem is solved approximately with use of network-flow techniques.

As SNAPHU uses an iterative optimization procedure, its execution time depends on the difficulty of the interferogram. In single-tile mode the required memory is on the order of 100 MB per 1000000 pixels in the input interferogram.

Znaczniki: Zaimplementowane w: C, Rola: Program

Inne pakiety związane z snaphu

• dep: libc6 (>= 2.34)

  Biblioteka GNU C: biblioteki współdzielone
  również pakiet wirtualny udostępniany przez libc6-udeb

Pobieranie snaphu

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Architektura	Rozmiar pakietu	Rozmiar po instalacji	Pliki
amd64	153,4 KiB	395,0 KiB	[lista plików]
arm64	139,8 KiB	386,0 KiB	[lista plików]
armel	140,9 KiB	374,0 KiB	[lista plików]
armhf	136,1 KiB	298,0 KiB	[lista plików]
i386	148,3 KiB	402,0 KiB	[lista plików]
mips64el	141,8 KiB	394,0 KiB	[lista plików]
ppc64el	163,7 KiB	451,0 KiB	[lista plików]
riscv64	149,9 KiB	327,0 KiB	[lista plików]
s390x	161,8 KiB	418,0 KiB	[lista plików]