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Thaumatin reconstruction and segmentation. From top row to bottom: the result of iterative reconstruction using the ToMoBAR package, manual segmentation using Avizo, a combined segmentation using GMM (liquor, loop and vacuum), GeoDistance thresholding and RegionGrow for the crystal. One can see that the GeoDistance method under-segments the crystal while RegionGrow is closer to the manual segmentation, yet slightly smoother.
