The description of the character groups in this study with their mathematical formulas.
| Types | Description | Formula |
|---|---|---|
| Morphometric Traits | ||
| Area | The area of a plant is denoted by the number of leaf pixels positioned above it per centimeter. | |
| Convex hull | The convex hull area denotes the smallest region bounded by an object's outer contour. The area of the convex hull was calculated using the pixel count per centimeter of the convex hull. | |
| Bounding area | The plant's bounding rectangle was the smallest rectangle that completely contained the plant. The value was determined by multiplying its width and height. | |
| Compactness | The object area divided by the convex hull area equals compactness. This can express plant density, including tillers and leaves. | |
| Perimeter | The measurement of the object's exterior boundary length. | |
| Centermassy | The Centre of mass Y shows the center of gravity of the y-axis. | |
| Eccentricity | Eccentricity is a mathematical parameter associated with the conic section. The value is specified between 0 and 1, with 0 representing a circle and 1 representing a line, to show the form of the plant. | |
| PAR | Perimeter Area Ratio | Plant Perimeter/Total Projected Shoot Area |
| TBR | Total plant area/bounding rectangle area ratio | Total projected plant area/bounding rectangle area |
| Colorimetric Traits | ||
| VEG | Vegetation Index | g/((r0.667)xb0.333) |
| CIVE | Color Index of Vegetation Extraction | 0.441R-0.811G+0.385B+18.787 |
| VARI | Visible Atmospherically Resistant Index | (g-r)/(g+r-b) |
| RGBVI | Red Green Blue Vegetation index | (G2-RxB)/(G2+BxR) |
| MGRVI | Modified Green Red Vegetation Index | (G2-R2)/(G2+R2) |
| NDI | Normalized Difference Index | (R-G)/(G+R) |
| GLI | Green Leaf Index | (2xG-R-B)/(R+2xG+B) |
| NGRDI | Normalized Green-Red Difference Index | (G-R)/(G+R) |
| Additional Information of Colorimetric Traits Formula | ||
| R | Digital number of red channels | |
| G | Digital number of green channels | |
| B | Digital number of blue channels | |
| r | Normalized red | R/(R+G+B) |
| g | Normalized green | G/(R+G+B) |
| b | Normalized blue | B/(R+G+B) |
