A fun little test setup that uses three (cheap) webcams and a (static) line projector, to measure the outline and curvatures of a human fingernail. Resulting in an Bézier curves based 3D model, that approximates the subjects fingernail.
A small volume is calibrated for all three cameras (using a simple calibration cube). Making it relatively easy to measure and reconstruct the outlines and curvature of a fingernail in a distinct color.
The line projector is used to add a high contrast reference on the smooth fingernail surface.
The end goal is to get an low data approximation of the fingernail shape, to produce custom (as in perfect fitting) artificial nails.