Jean Devroye recently asked Alexandre Duvallet to create a software program to measure the scalp surface area. The software is useful for measuring the both the donor area and the recipient area. One can also plot the follicular density in a given area using the software. The software has it’s limitations however. The scalp is a curved three-dimensional surface. Photographs are a two dimensional surface. In order to convert a scalp surface area to a two dimensional surface area, one must take a clear surface area such as saran wrap, place it on the scalp, and then draw the surface area…