1. A method for modeling two-dimensional (2D) contours of a human body, comprising the steps of: capturing natural shapes/poses of a three-dimensional (3D) model of a human body, projecting the 3D model into a camera plane to derive 2D contours, segmenting the 2D contours based on a predetermined segmentation of the 3D model, and creating a factored representation of non-rigid deformations of the 2D contours, wherein the deformations are represented by line segments.