For pt.I see ibid., vol.7, no.1, p.45-52 (1992). Dynamic-scene and motion analysis techniques developed to support the DARPA Strategic Computing program's autonomous land vehicle effort are described. Motion-understanding techniques using displacement fields, 3-D motion and structures, and feature correspondence, which show promise, are discussed, and the issues to be addressed and problems to be solved before robust dynamic-scene and motion analysis is achieved are examined.