Figure 2
From: Polarimetric observables for the enhanced visualization of plant diseases
Polarimetric images of Olea europaea leaf used in this study. (a) Picture of the underside part of O. europaea leaf. Black square denotes for selected region of interest (ROI) analyzed in remaining images, (b) regular intensity image (M00) of the O. europaea transmission ROI and its corresponding polarimetric observables (c) P1, (d) P2, (e) P3, (f) PΔ, (g) P, (h) D and (i) PS for visual comparison. All images correspond to 625 nm illumination wavelength measurements performed at transmission set-up configuration. Red and yellow dotted lines correspond to diameter and width measurements for chlorotic spot and necrotic ring, respectively. Yellow arrows indicate the unveiled vascular structures.
