1. A method performed by a computer system comprising processor electronics and at least one memory device, the method comprising: obtaining multiple three dimensional (3D) point clouds captured using one or more 3D cameras, wherein at least two of the 3D point clouds correspond to different positions of a body relative to at least a single one of the one or more 3D cameras; identifying two of the 3D point clouds as corresponding to two predefined poses; and generating, based on the two 3D point clouds identified as corresponding to the two predefined poses, a segmented representation of the body in accordance with a 3D part-based volumetric model comprising cylindrical representations.