pytrax is an implementation of a random walk to calculate the tortuosity tensor of images.
The following code block illustrates how to use pytrax to perform a random walk simulation in open space, view the results and plot the mean square displacement to get the tortuosity:
>>> import pytrax as pt
>>> import numpy as np
>>> image = np.ones([3, 3])
>>> rw = pt.RandomWalk(image)
>>> rw.run(1000, 1000)
>>> rw.plot_walk_2d()
>>> rw.calc_msd()
>>> rw.plot_msd()