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PyMaxflow is a Python library for graph construction and maxflow computation (commonly known as graph cuts). The core of this library is the C++ implementation by Vladimir Kolmogorov, which can be downloaded from his homepage. Besides the wrapper to the C++ library, PyMaxflow offers

  • NumPy integration,
  • methods for fast construction of common graph layouts in computer vision and graphics,
  • implementation of algorithms for fast energy minimization which use the maxflow method: the αβ-swap and the α-expansion.

Take a look at the PyMaxflow documentation.


You need the following libraries and tools installed on you system in order to build PyMaxflow:

They should be automatically downloaded and installed if PyMaxflow is installed via PyPI using pip install (see below).

Installation via PyPI

Open a terminal and write:

$ pip install PyMaxflow

Depending on your local configuration, you might need admin privileges. In that case, login as root or use sudo before pip install.

Manual installation

Download the source code or clone the Github repository. Then, open a terminal and write:

$ cd path/to/PyMaxflow
$ python build
... lots of text ...

If everything went OK, you should be able to install the package with:

$ sudo python install


The documentation of the package is available under the doc directory. To generate the HTML documentation, use:

$ cd doc/
$ make html


Python library for creating flow networks and computing the maxflow/mincut (aka graph-cuts for Python)



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