Sclaroff, StanPentland, Alex2011-09-142011-09-141994-11Sclaroff, S.; Pentland, A.P.. "Physically-Based Combinations of Views: Representing Rigid and Nonrigid Motion”, Technical Report BUCS-1994-016, Computer Science Department, Boston University, November 1994. [Available from: http://hdl.handle.net/2144/1486]https://hdl.handle.net/2144/1486Nonrigid motion can be described as morphing or blending between extremal shapes, e.g., heart motion can be described as transitioning between the systole and diastole states. Using physically-based modeling techniques, shape similarity can be measured in terms of forces and strain. This provides a physically-based coordinate system in which motion is characterized in terms of physical similarity to a set of extremal shapes. Having such a low-dimensional characterization of nonrigid motion allows for the recognition and the comparison of different types of nonrigid motion.en-USTechnical Report