How can make the smoothed vtk mesh vertices distribute evenly

After smoothing the contour constructed by MatchingCubes with below codes, contour=vtk.vtkMarchingCubes() smoother = vtk.vtkWindowedSincPolyDataFilter() The result seem like below. Some vertices

VTK: vtkSmoothPolyDataFilter Class Reference

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VTK: vtkSmoothPolyDataFilter Class Reference

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