Table 12.

Texture features of the fracture propagation area of materials investigated, DifEntrp—difference entropy, ShrtREmph—short run-length emphasis moment, LngREmph—long run-length emphasis moment.

Material	Entropy	DifEntrp	ShrtREmp	LngREmph	Texture Index	Composite Index
CR	3.21 ± 0.00	1.46 ± 0.02	0.97 ± 0.00	1.13 ± 0.01	2.84 ± 0.03	1.51 ± 0.02
EN	3.21 ± 0.00	1.44 ± 0.01	0.97 ± 0.00	1.15 ± 0.00	2.80 ± 0.01	1.49 ± 0.01
GR	3.21 ± 0.01	1.45 ± 0.02	0.97 ± 0.00	1.15 ± 0.01	2.79 ± 0.03	1.50 ± 0.02
VSC A	3.23 ± 0.00	1.48 ± 0.00	0.98 ± 0.00	1.10 ± 0.00	2.95 ± 0.01	1.52 ± 0.00
VSC B	3.22 ± 0.01	1.47 ± 0.01	0.98 ± 0.00	1.10 ± 0.00	2.93 ± 0.01	1.51 ± 0.01