Accurate Computation of Optical Flow by Using Layered Motion Represent at ions

This paper presents a framework combining two prevailing approaches t o motion analysis: optical f low which describes motion at each point, and methods that define global motions for [arger regions. Image motion is represented b y layers, image regions whose coherent motion can be approximated b y some parametric motion model. The motion at every point is obtained b y the parametric motion estimate of the entire layer, corrected b y a residual f low field which captures the diflerence between the real image motion and the layer's motion model. The new approach is able to construct accurate flow fields in the presence of multip le motions, motion boundaries, and transparent motions.