Stereographic Lampshades

This article explains how to design a 3D-printed lampshade that projects a custom image using stereographic projection. It covers the mathematical mapping from a point on a sphere to a point on a plane, including polar coordinates and trigonometric relationships. The tutorial then demonstrates binarizing an image to create a mask for cutting holes in the spherical lampshade, with example code in Matlab. The content is focused on geometry, projection mathematics, and image processing for a tech/DIY project.