Computing Motions of (Locally) Planar Surfaces from Spatio-Temporal Changes in Image Brightness: A Note

摘要

The motion at a locus on the projection surface cannot be obtained locally from spatio-temporal changes in image intensity at that locus. If the imaged surfaces are (locally) planar, however, and generate a set of non-parallel straight line edges in the image, it is possible to obtain estimates of image velocities of a set of image points corresponding to the intersections of the lines. The availability of such a (small set is sufficient to resolve the underlying optical flow into its translational and rotational components. (Author)