I have posted already a similar question, but just to make my
question more precise, I can imagine a*sphere initially arounbd my set
of 3d points, and then air in pumped out of it so that its volume gets
smaller and smaller to finally stretch tightly around the volume definerd by
thgose points. Some points may be inside, but they are a minority (more a
noise than anything else), and the majority of 3d points define a 2d cover...
how to approximate this volume wuith spheres or blobs????
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