Trinocular stereo analysis of optical flow

A method for analyzing optical flows in orthographic projections of 3D rigid motions is described. A trinocular stereo constraint for optical flow derived from geometrical relations between three views is proposed. Instead of taking the correspondence between tokens in stereo images, the method is to reconstruct the motion and structure of a rigid motion by solving a nonlinear optimization problem for optical flow from three views with the trinocular stereo constraint. In the case of multiple motions, optical flow from each view is segmented into component optical flows by utilizing the properties of parallel optical flow vectors. The next step is to estimate globally the degree of correspondence between three component optical flows selected from three different views by using the trinocular stereo constraint, and thus to determine plausible correspondence. The optimization process for a single motion reconstructs the 3D information using the established correspondence