Figure 4.

Linear discriminant analysis (LDA) score plot based on reflectance (a) and color and texture resources (b) of black oat seeds for classes of uninoculated and inoculated seeds with Drechslera avenae (Eidam) Sharif. (a, b) Ellipses show 95% confidence intervals for each seed health class. For each class, n = 200. (c) R-squared values indicate the spectral reflectance contributions of 19 wavelengths, and (d) the individual contribution of 36 variables extracted from multispectral images for classification of four seed health classes: 1-uninoculated; 2-inoculated for 24 h; 3-inoculated for 72 h; 4-inoculated for 120 h.