porespy.filters.local_thickness_imj#

porespy.filters.local_thickness_imj(im, dt=None, smooth=False, approx=False)#

Insert a maximally inscribed sphere at every pixel labelled by sphere radius

Parameters:

  • im (ndarray) – Boolean image of the porous material

  • dt (ndarray, optional) – The distance transform of the image

  • smooth (bool, optional) – Indicates if protrusions should be removed from the faces of the spheres or not. Default is True.

  • approx (bool, optional) – If True the algorithm is more agressive at skipping voxels to process, which speeds things up, but this sacrifices accuracy in terms of a voxel-by-voxel match with the reference implementation. The default is False, meaning full accuracy is the default.

Returns:

lt – The local thickness of the image with each voxel labelled according to the radius of the largest sphere which overlaps it

Return type:

ndarray

Notes

This version uses some logic to only insert spheres at locations which are not fully overlapped by larger spheres to reduce the number of insertions

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