Fig. 3

Mask creation and calculation of the average root GV based on characteristic peaks. a Depicts the drawing of a circular ROI bounded within the pot wall (red circle) on a 2D section of the worse case scenario. The bounded ROI serves the purpose of creating a mask. By extension of the bounded ROI by 50 pixels, an extended ROI is created (blue line). b Histogram of the bounded and extended ROI illustrated in a The extended ROI serves the purpose of creating a peak in the histogram which is used to calculate the average root GV