Description

In this thesis, we study the problem denoted as Non-Rigid Structure from Motion and tackle the two distinct parts of the problem: motion and shape estimation together with the corresponding temporal segmentation into actions of the body. For the motion estimation, we implement a Single Rotation algorithm (SRA) based on the Weiszfeld algorithm for the median of points in R^n. We use Brand's method to obtain a full corrective matrix and several estimates for the rotation matrices but find that the first column triplet obtains better results than any of the triplets found by Brand's method, making SRA pointless. For the shape factor, we make an assumption that shapes lie in a temporal union of subspaces.