This paper presents an automatic alignment procedure for a 4-Source Photometric Stereo technique to reconstruct the depth map in the Scanning Electron Microscopy. PS, based on the so-called reflectance map, used several images of a surface to estimate the surface depth at each image point. Lambertian reflectivity function is the simplest one. In the SEM one of the most important signals, the Backscattered Electron emission, is nearly Lambertian, and, to simplify matters, SEM images are intrinsically greyscale maps. The possibility for electron-PS is assumed, taking advantage of one of the most exciting features of the technique, which doesn't return some depth illusion from ordinary pictures, but true numerical 3D models.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.