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Fig. 2.

image

Illustration of the 3D DisPerSE skeleton projected on a 2D plane. Segments of filaments (thick black lines) are organised into portions delimited by critical points (in red, green and blue respectively for maxima, saddles and bifurcations). Maximum density critical points are located in over-dense regions (represented by grey discs) identified from the Delaunay density field. This illustration shows a total of 44 segments, organized in 18 portions forming 13 filaments, defined as the sets of segments connecting maxima to saddles.

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