By expanding the technique of detection of a motion vector by the of time-space differential method, (1) repetitive calculations are not needed, (2) different motion vectors near the boundary of an object can be detected, and (3) coupling of the region segmentation and the framework is enabled. For this,...http://www.google.de/patents/US5479218?utm_source=gb-gplus-sharePatent US5479218 - Motion vector detecting apparatus
