Fig. 3
From: Machine learning as a tool for classifying electron tomographic reconstructions
Plain reconstruction, processed with NAD. a The reconstruction from Fig. 1 but processed with NAD. b The result of a 5-level Otsu threshold operation on the processed image. c The histogram for (b) with the threshold levels indicated. d The middle three threshold levels from the top-left part of (a) displayed in separate images. Inset regions are ×2 magnified from the phantom (left) and NAD-filtered reconstruction (right). The contrast in the right inset of (a) has been enhanced for the purpose of improved visibility