Large volume & vcgIsosurface

[Celli119]

Thresholding followed by mesh registration is really convenient to make quick segmentations but for large volumes, which happen quite often, it requires too much RAM.
Then, the idea, would be to :

• split the volume into subvolumes (250 px cube for e.g.)
• apply the marching cubes algorithm (vcgIsosurface) for each of them separately
• merge meshes into a single one
• merge closed vertices
• clean everything

That's what I did but maybe there is a more suitable solution directly implemented in the vcg lib.

[zarquon42b]

Hi, this is a good idea. However, in order to obtain a watertight mesh, you would need to remesh the merged meshes.
The problem with vcglib is, that it is not very memory efficient, at least not the space discretization part.
In case your data is stored in files, you can try vtkTriangulate from RvtkStatismo.