Compute distance between 2 models

Development
1

I have reconstructed two 3D models in the scene. I want to convert them into point clouds and then calculate a comprehensive distance between the two models.

How should I achieve this? For example, if I convert each model into 10 points and also convert the other model into 10 points, then I can use the Kabsch algorithm in this case.

With Python script.

2

If the models are vtkPolyData, as you would get from model mrml nodes in slicer, then there are vtk filters that compute distance. E.g. hausdorff distance

import vtk
hausdorff_filter = vtk.vtkHausdorffDistancePointSetFilter()
hausdorff_filter.SetInputData(0, polydata1)
hausdorff_filter.SetInputData(1, polydata2)
hausdorff_filter.Update()
print(hausdorff_filter.GetHausdorffDistance())

Of course if you have the point clouds in hand then you can also write your own algorithm in python

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