Figure 5. Large Beads Porosity and Number of Clusters vs.threshold value
Figure 6 shows the analysis of the glass-bead sample at threshold 0.45.
Figure 6A presents the applied pore cluster analysis to this sample,
resulting in a singular pore system, with all the pores being connected.
The histogram in Figure 6B shows that there likely is one main pore
system and, with the mode consisting of one voxel probably generated by
imaging noise and processing artifacts. The singular pore system
surrounds the glass beads. These results indicate that the PCA protocol
developed for our studies faithfully reflects the physical reality of
the system under consideration.