Table 1.
The summary of mean values and standard errors (SE) of morphological and colour features of Arabica (n = 105) and Robusta (n = 70) coffee bean samples.
| Morphological/colour feature | Arabica |
Robusta |
p-value | ||
|---|---|---|---|---|---|
| Mean | SE | Mean | SE | ||
| Area (mm2) | 72.27 | 0.61 | 69.21 | 1.45 | 0.030 |
| Length (mm) | 10.95 | 0.06 | 10.46 | 0.11 | 0.000 |
| Width (mm) | 8.25 | 0.03 | 8.42 | 0.09 | 0.025 |
| Width/Length ratio | 0.76 | 0.00 | 0.81 | 0.00 | 0.000 |
| Compactness Circle | 0.75 | 0.00 | 0.81 | 0.00 | 0.000 |
| Compactness Ellipse | 1.00 | 0.00 | 1.00 | 0.00 | 0.000 |
| BetaShape_a | 1.42 | 0.00 | 1.50 | 0.00 | 0.000 |
| BetaShape_b | 1.38 | 0.00 | 1.45 | 0.00 | 0.000 |
| CIELab L* | 19.88 | 0.34 | 17.95 | 0.26 | 0.000 |
| CIELab A* | 12.00 | 0.11 | 11.24 | 0.09 | 0.000 |
| CIELab B* | 27.98 | 0.22 | 26.57 | 0.20 | 0.000 |
| Saturation | 29.48 | 0.26 | 27.67 | 0.22 | 0.000 |
| Hue | 1.15 | 0.00 | 1.14 | 0.00 | 0.841 |