Table 4 Root mean square errors (RMSE) and coefficient of variation (CV) of LAI estimation based on VI, H × VI and H × ln(VI + 1) model using ten-fold cross-validation
|  | VI | VI × H | H × ln(VI + 1) | |||
|---|---|---|---|---|---|---|
RMSE | CV (%) | RMSE | CV (%) | RMSE | CV (%) | |
MTCI | 1.44 | 35.1 | 1.09 | 26.6 | 0.97 | 23.8 |
\({\text{CI}}_{{{\text{green}}}}\) | 1.43 | 34.9 | 1.08 | 26.3 | 0.95 | 23.1 |
\({\text{CI}}_{{{\text{red edge}}}}\) | 1.43 | 34.9 | 1.09 | 26.6 | 0.98 | 23.8 |
NDRE | 1.42 | 34.7 | 0.96 | 23.4 | 0.95 | 23.2 |
WDRVI | 1.42 | 34.6 | 0.95 | 23.1 | 0.95 | 23.3 |
NDVI | 1.41 | 34.4 | 1.01 | 24.7 | 1.02 | 24.9 |
OSAVI | 1.38 | 33.7 | 0.94 | 23.0 | 0.94 | 22.9 |
EVI2 | 1.20 | 29.4 | 0.98 | 23.9 | 0.99 | 24.1 |