Applying the tool to transections of
stalks. A) Stalk perimeter (blue line) and rind/pith boundary (red line) superimposed on the orginial, unprocessed color image. B) Detected vascular bundles (red circles). C) An individual vascular bundle in the unprocessed image. D) Grayscale representation of A after processing including homomorphic filtering. E) Level contours of the 2D Gaussian distribution fit to the grayscale image in D projected onto the original image. This shows the method measures the very small vascular bundles in thin stalks of Miscanthus.