Is it possible to interpret body dimensions (including depth) from a conventional point-and-shoot camera? Basically, can you calculate body dimensions to be used in 3D printing using an iphone camera? If so, details? If not, what if there was either a marker (e.g., a loose-fitting shirt with reflective markers - similar to motion capture dots) or a scale (e.g., known distance from camera)?

Purpose: I'm a medical student trying to see if it's possible to design a custom mold of a person using only conventional, ubiquitous equipment (i.e., smartphone camera, open-source software...etc.)

Thanks,
BT