[Insight-users] DeformableMesh3DFilter with an open mesh

[Georgi Diakov]

Dear All,

I have aplied the DeformableMesh3DFilter to segment bone from CT images. The
initial mesh is a result from thresholding and marching cubes triangulation. It
is an open surface, e.g. only a patch, delineating a region on the bone. If the
number of iterations is set high enough value, in order to reach convergence,
the whole mesh gets shifted into the corner of the image.
1. Does anybody know, if the reason for that shift could be, that the mesh is
not a complete closed surface?
2. Is there a way to limit the range of influence of the gradient forces, so
that they affect only nodes, which are in close neighbourhood of the contour?
Could this be done with reducing the GradientMagnitude? Actually, reducing the
GradientMagnitude only diminishes the deformation; I haven't established an
influence on the range of effect of the forces.

Thanks for the help!
Georgi