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Table 6 Gray Level Co-Occurrence Matrix (GLCM) and Gray Level Run Length Matrix (GLRLM) of the horse’s back obtained before and after a training session with the use of method VI (novel texture analysis) for two groups of riders: low body weight (LBW) and high body weight (HBW)

From: A novel approach to thermographic images analysis of equine thoracolumbar region: the effect of effort and rider’s body weight on structural image complexity

GLCM Contras Correlate InvDefMom Entropy DifVarnc DifEntrp
LBW HBW LBW HBW LBW HBW LBW HBW LBW HBW LBW HBW
Before 1.11 ± 0.49a 1.27 ± 0.46a 0.88 ± 0.09a 0.91 ± 0.06a 0.73 ± 0.07a 0.72 ± 0.05a 1.28 ± 0.30a 1.35 ± 0.22a 0.69 ± 0.27a 0.79 ± 0.26a 0.45 ± 0.08a 0.47 ± 0.06a
After 0.46 ± 0.11b 0.78 ± 0.36c 0.92 ± 0.02a 0.87 ± 0.04b 0.82 ± 0.04b 0.77 ± 0.05c 1.07 ± 0.17b 1.19 ± 0.17c 0.31 ± 0.06b 0.49 ± 0.21c 0.32 ± 0.04b 0.40 ± 0.06c
p < 0.0001 0.0010 0.5140 0.0470 0.0001 0.0073 0.0050 0.0108 < 0.0001 0.0006 < 0.0001 0.0006
GLRLM RLN GLN LRE SRE Fraction MRLN
LBW HBW LBW HBW LBW HBW LBW HBW LBW HBW LBW HBW
Before 747 ± 378a 896 ± 314a 793 ± 184a 916 ± 379a 177 ± 205a 133 ± 85a 0.24 ± 0.07a 0.26 ± 0.06a 0.16 ± 0.05a 0.16 ± 0.04a 0.11 ± 0.03a 0.12 ± 0.02a
After 263 ± 101b 568 ± 327c 693 ± 171b 997 ± 421a 317 ± 279b 161 ± 111c 0.13 ± 0.02b 0.19 ± 0.05c 0.10 ± 0.02b 0.14 ± 0.03c 0.07 ± 0.01b 0.09 ± 0.02c
p < 0.0001 0.0043 0.0087 0.6218 0.0011 0.0002 0.0219 0.0008 0.0002 0.0219 < 0.0001 0.0004
  1. Contras contrast, Correlate correlation, InvDefMom inverse different moment, Entropy entropy, DifVarnc difference variance, DifEntrp difference entropy, RLN run length nonuniformity, GLN Gray level non-uniformity, LRE long run emphasis, SRE short run emphasis, Fraction fraction of image in runs, MRLN run length nonuniformity moment. a, b - subsequent letters in superscript indicated differences before/after a training session and LBW/HBW. Additionally, differences before/after a training session indicated with the p-value, and LBW/HBW emphasized with bold font. The significance level was established as p < 0.05