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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