Table 2.
Pearson's correlation coefficients (r) between image-dependent attributes and physical–chemical properties
| pH | Moisture % (m/m) | G' 1 Hz (Pa) |
Hardness (N) |
Adhesiveness (-N.s) |
|
|---|---|---|---|---|---|
| Perimeter per hole (mm) | − 0.35* | − 0.32 | − 0.07 | 0.01 | 0.05 |
| Feret (mm) | − 0.24 | − 0.27 | − 0.06 | − 0.01 | 0.04 |
| minFeret (mm) | − 0.23 | − 0.26 | − 0.04 | 0.01 | 0.07 |
| SF ( −) | 0.33* | 0.27 | − 0.07 | − 0.07 | − 0.09 |
| Area per hole (mm2) | − 0.42* | − 0.36* | − 0.07 | 0.05 | 0.12 |
| Percentage of holes (%) | − 0.85** | − 0.67** | 0.07 | 0.30 | 0.32 |
| Holes per unit area (holes cm−2) | − 0.67** | − 0.55** | 0.26 | 0.42** | 0.40* |
*Marked correlation significant (0.01 < p < 0.05)
**Marked correlation strongly significant (p < 0.01)