Figure 3
From: Multi-Scale Correlative Tomography of a Li-Ion Battery Composite Cathode
The estimation of the quality of two different ternary Xt segmentation methods, by means of Cohen’s κ and comparison of the pore structure.
(a) Cohen’s κ for each possible combination of AM and CBD threshold values. (b) The pore size distributions of Xt and FIB/SEMt, calculated from (h,j,l), respectively. (c) A 2D Xt image of the correlatively imaged volume. (d) A 3D representation of the correlatively imaged volume as seen with Xt. (e) A FIB/SEMt image corresponding to (c). (f) A 3D representation of the correlatively imaged volume as seen with FIB/SEMt. (g) The best ternary Xt segmentation as determined in a, visualized by application to the 2D Xt image in (c). The AM and CBD are gray and light beige, respectively. (h) The corresponding spatial pore size distribution in 3D. (i) The same Xt data as used in (g), segmented by the AHE-based segmentation described within this work. (j) The corresponding spatial pore size distribution in 3D. (k) A 2D image of the FIB/SEMt segmentation that was used as reference. Features shaded in red were considered too small for detection by Xt and therefore excluded from comparison. (l) The spatial pore size distribution of the FIB/SEMt AM segmentation in 3D. The scale bars in (c–l) correspond to 5 μm.
