A General Framework for 2D Multiframe and 3D Surface-to-surface Motion Estimation

A general framework for 2D multiframe and 3D surface-to-surface motion estimation is presented in this paper. By viewing a 2D contour sequence as a pseudo 3D surface, we solve the motion estimation problem for 2D multiframe and 3D surface-to-surface in a general framework, by estimating the motion of a ”surface”. The deformation of a ”surface” is modeled using spline-based motion. This spline-based motion model does not constrain the motion type in the temporal domain for 2D multiframe motion estimation. For 3D motion estimation, we focus on the relationship between the underlying nonrigid motion and 3D surface properties. The spline motion model provides our method certain advantages over other nonrigid shapebased methods. For example, we do not need approximation of the orthogonal parameterization. The small deformation constraint introduced by the previous surface-to-surface motion estimation methods is also relaxed in our method. Experiments on both synthetic and real motion are presented in this paper.