Introduction
In this tutorial we learn how to install snaphu on Kali Linux.
What is snaphu
snaphu is:
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.
There are three methods to install snaphu on Kali Linux. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install snaphu Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get updateAfter updating apt database, We can install snaphu using apt-get by running the following command:
sudo apt-get -y install snaphuInstall snaphu Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install snaphu using apt by running the following command:
sudo apt -y install snaphuInstall snaphu Using aptitude
If you want to follow this method, you might need to install aptitude on Kali Linux first since aptitude is usually not installed by default on Kali Linux. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install snaphu using aptitude by running the following command:
sudo aptitude -y install snaphu
How To Uninstall snaphu on Kali Linux
To uninstall only the snaphu package we can use the following command:
sudo apt-get remove snaphu
Uninstall snaphu And Its Dependencies
To uninstall snaphu and its dependencies that are no longer needed by Kali Linux, we can use the command below:
sudo apt-get -y autoremove snaphu
Remove snaphu Configurations and Data
To remove snaphu configuration and data from Kali Linux we can use the following command:
sudo apt-get -y purge snaphu
Remove snaphu configuration, data, and all of its dependencies
We can use the following command to remove snaphu configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge snaphu
Dependencies
snaphu have the following dependencies:
References
Summary
In this tutorial we learn how to install snaphu package on Kali Linux using different package management tools: apt, apt-get and aptitude.
