From: Predicting the quality of ryegrass using hyperspectral imaging
Variable | HSI data | Wavelength range | # LV PLSR | R2 calibration | RMSE calibration | R2 validation | RMSE validation | Validation intercept | Validation slope | Validation prediction bias |
---|---|---|---|---|---|---|---|---|---|---|
Sugars (mg/g) | BL + PS | 550–1700 nm | 12 | 0.70 | 28.9 | 0.58 | 34.4 | 10.1 ± 9.6 mg/g | 0.93 ± 0.10 | − 3.8 mg/g |
Sugars (mg/g) | BL + PS | 550–900 nm | 5 | 0.18 | 47.6 | 0.20 | 47.7 | − 15.3 ± 27.6 mg/g | 1.20 ± 0.30 | − 2.54 mg/g |
Sugars (mg/g) | BL + PS | 900–1700 nm | 8 | 0.53 | 36.0 | 0.43 | 40.1 | 18.8 ± 11.6 mg/g | 0.85 ± 0.12 | − 4.9 mg/g |
Nitrogen (%) | BL + PS | 550–1700 nm | 20 | 0.86 | 0.25 | 0.70 | 0.35 | 0.69 ± 0.22% | 0.80 ± 0.067 | − 0.05% |
Nitrogen (%) | BL + PS | 550–900 nm | 13 | 0.71 | 0.36 | 0.41 | 0.48 | 1.19 ± 0.31% | 0.64 ± 0.10 | − 0.06% |
Nitrogen (%) | BL + PS | 900–1700 nm | 7 | 0.62 | 0.41 | 0.44 | 0.47 | 0.64 ± 0.37% | 0.79 ± 0.11 | 0.04% |