size_to_satn#

Converts values of invasion size into a saturation map

import numpy as np
import porespy as ps
import matplotlib.pyplot as plt
from edt import edt
ps.visualization.set_mpl_style()

The arguments and default values for this function are:

import inspect
inspect.signature(ps.filters.size_to_satn)
<Signature (size, im=None, bins=None)>

Generate an image containing invasion sizes using the porosimetry function:

np.random.seed(0)
im = ps.generators.blobs([200, 200], porosity=0.5)
inv = ps.filters.porosimetry(im)

size#

The sizes are produced by porosimetry for instance:

satn = ps.filters.size_to_satn(size=inv)
fig, ax = plt.subplots(1, 2, figsize=[12, 6])
ax[0].imshow(inv/im, origin='lower', interpolation='none')
ax[0].set_title('Invasion map by size')
ax[0].axis(False)
ax[1].imshow(satn/im, origin='lower', interpolation='none')
ax[1].set_title('Invasion map by saturation')
ax[1].axis(False);
../../../_images/0793f34560b86c9518b19129db4ee8aac6d77702c6b275359daae32d7c59870d.svg

The saturation map makes it very easy to obtain a desired fluid configuration just by applying a threhold:

fig, ax = plt.subplots(1, 2, figsize=[12, 6])

s = 0.3
ax[0].imshow((satn < s)*(satn > 0)/im, origin='lower', interpolation='none')
ax[0].set_title(f'saturation = {s}')
ax[0].axis(False)

s = 0.6
ax[1].imshow((satn < s)*(satn > 0)/im, origin='lower', interpolation='none')
ax[1].set_title(f'saturation = {s}')
ax[1].axis(False);
../../../_images/c6bb82a2769f107151225512b02a6322a947102f7ecdc5b9059242b66e8281c4.svg

im#

The boolean image can be optionally passed into so that uninvaded regions can be differentiated from solid (if both are labelled 0).

fig, ax = plt.subplots(1, 2, figsize=[12, 6])

satn = ps.filters.size_to_satn(size=inv)
ax[0].imshow(satn, origin='lower', interpolation='none')
ax[0].set_title('Invasion map by size')
ax[0].axis(False)

satn = ps.filters.size_to_satn(size=inv, im=im)
ax[1].imshow(satn, origin='lower', interpolation='none')
ax[1].set_title('Invasion map by saturation')
ax[1].axis(False);
../../../_images/acd8ef2d27dd04b7d7a0dbf60fa0c18835a51e1a6dd2b39c8d7b39a373a7317d.svg

The different between the two images above is that when im is not supplied, then uninvaded regions are given a lable of 0, matching solid. When im is supplied, the uninvaded regions are labelled -1.

bins#

The number of sequence values to when converting sizes. The default is 25.

fig, ax = plt.subplots(1, 2, figsize=[12, 6])

bins = 5
seq = ps.filters.size_to_satn(size=inv, bins=bins)
ax[0].imshow(seq, origin='lower', interpolation='none')
ax[0].set_title(f'bins = {bins}')
ax[0].axis(False)

bins = 25
seq = ps.filters.size_to_satn(size=inv, bins=bins)
ax[1].imshow(seq, origin='lower', interpolation='none')
ax[1].set_title(f'bins = {bins}')
ax[1].axis(False);
../../../_images/9ce7941d8170ac7785c969514e37e74d0bb28f2a6917ab4a385227ea33c5e1ab.svg