Structure-from-Motion Reconstruction and Reference Microscopy of Severely Eroded Blade

The DEMs were acquired from 35 mm × 35 mm regions of interest (RoI) on the blade surface in two different ways; confocal microscopy of a replica of the surface using replica moulding and a rasterized RoI from a high-resolution Structure-from-Motion (SfM) reconstruction. The DEMs are provided as ASCII files with 13 lines of header describing the image size in both pixels and absolute length and width.

The confocal microscopy images were acquired using a PLU NEOX confocal microscope by Sensofar with a x5 magnification objective (NA = 0.15). For each image, a 4 × 4 binning was used resulting in a final pixel size of 13.3 μm. The images for the SfM reconstruction were acquired using a Canon 5DS DSLR camera with a variable zoom lens (Canon 70-300 f/4-5.6L IS USM)with the focal length fixed at 300 mm.