Detecting the Early Stage of Phaeosphaeria Leaf Spot Infestations in Maize Crop Using In Situ Hyperspectral Data and Guided Regularized Random Forest Algorithm

Table 1

The confusion matrix showing overall accuracy (OA) and kappa for classifying the early stages of PLS (ES) and the healthy stage (HS) using the independent test dataset.

Using 1623 wavelengths			Using the selected 6 wavelengths
ES	HS	Total	ES	HS	Total
51	15	66	55	11	66
6	66	72	6	66	72
61	77	138	61	77	138
AO = 81.88%; Kappa = 0.64			AO = 87.68%; Kappa = 0.75