highly significantp value < 0.05
Image Features Associated with ARR Resistance The correlation analysis of the extracted RGB features—selected using EN—revealed highly significant association with the visual disease scores (Spearman correlation coefficient, −0.73 ≤ ρ ≤ 0.74 and −0.82 ≤ ρ ≤ 0.84, p value < 0.05, for root_1 and root_2, respectively, Figure 4 ).